U.S. patent application number 12/986979 was filed with the patent office on 2011-06-23 for video presenting network configuration solution space traversal.
This patent application is currently assigned to Microsoft Corporation. Invention is credited to Marcus J. Andrews, Bryan L. Langley, Michael Milirud.
Application Number | 20110149161 12/986979 |
Document ID | / |
Family ID | 35188574 |
Filed Date | 2011-06-23 |
United States Patent
Application |
20110149161 |
Kind Code |
A1 |
Milirud; Michael ; et
al. |
June 23, 2011 |
VIDEO PRESENTING NETWORK CONFIGURATION SOLUTION SPACE TRAVERSAL
Abstract
Resources of a video presenting network having plural outputs
can be configured. A provisional configuration can be supported.
Configuration of inputs can be performed separately from
configuration of outputs. Interdependencies between network
resources can be considered to restrict provided options to those
co-functional with a provisional configuration. Responsibility for
considering interdependencies can be delegated to a video driver,
such as a video miniport. A client can use a variety of approaches
to find a desired configuration. The desired configuration can be
treated as a solution to an NP-Complete graph problem.
Inventors: |
Milirud; Michael; (Bellevue,
WA) ; Andrews; Marcus J.; (Bellevue, WA) ;
Langley; Bryan L.; (Duvall, WA) |
Assignee: |
Microsoft Corporation
Redmond
WA
|
Family ID: |
35188574 |
Appl. No.: |
12/986979 |
Filed: |
January 7, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10925662 |
Aug 24, 2004 |
7898533 |
|
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12986979 |
|
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|
60567053 |
Apr 30, 2004 |
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Current U.S.
Class: |
348/571 ;
348/E5.062 |
Current CPC
Class: |
H04N 21/4122 20130101;
H04N 21/4316 20130101; H04N 21/43615 20130101; G06F 3/1423
20130101 |
Class at
Publication: |
348/571 ;
348/E05.062 |
International
Class: |
H04N 5/14 20060101
H04N005/14 |
Claims
1-15. (canceled)
16. A method of configuring a video presenting network comprising
video sources and video targets, the method comprising: selecting a
topology for the video presenting network; enumerating
co-functional options for the video sources; from among the
co-functional options for the video sources, pinning options for
the video sources; enumerating co-functional options for the video
targets; and from among the co-functional options for the video
targets, pinning options for the video targets.
17. The method of claim 16 wherein: the co-functional options for
the video sources are co-functional with respect to the topology;
and the co-functional options for the video targets are
co-functional with respect to the topology and co-functional with
respect to the pinned options for the video sources.
18. The method of claim 16 wherein pinning options for the video
sources comprises: pinning an option for a first video source,
wherein the pinning invalidates a configuration option for a second
video source; determining that the configuration option for the
second video source has been invalidated; and unpinning the option
for the first video source responsive to determining that the
configuration option for the second video source has been
invalidated.
19. The method of claim 16 further comprising: responsive to
determining a desired option is not among the co-functional options
for the video sources, choosing a different topology.
20. The method of claim 16 further comprising: responsive to
determining a desired option is not among the co-functional options
for the video targets, choosing a different topology.
21. The method of claim 16 further comprising: responsive to
determining a desired option is not among the co-functional options
for the video targets, choosing a different option for at least one
of the video sources.
22. (canceled)
23. The method of claim 16 wherein: the co-functional options for
the video sources are co-functional with respect to the topology;
and the co-functional options for the video targets are
co-functional with respect to the topology.
24. One or more computer-readable storage media storing
computer-executable instructions for causing a computer to perform
a method, the method comprising: selecting a topology for the video
presenting network; enumerating co-functional options for the video
sources; from among the co-functional options for the video
sources, pinning options for the video sources; enumerating
co-functional options for the video targets; and from among the
co-functional options for the video targets, pinning options for
the video targets.
25. The one or more computer-readable storage media of claim 24
wherein: the co-functional options for the video sources are
co-functional with respect to the topology; and the co-functional
options for the video targets are co-functional with respect to the
topology and co-functional with respect to the pinned options for
the video sources.
26. The one or more computer-readable storage media of claim 24
wherein pinning options for the video sources comprises: pinning an
option for a first video source, wherein the pinning invalidates a
configuration option for a second video source; determining that
the configuration option for the second video source has been
invalidated; and unpinning the option for the first video source
responsive to determining that the configuration option for the
second video source has been invalidated.
27. The one or more computer-readable storage media of claim 24
further comprising: responsive to determining a desired option is
not among the co-functional options for the video sources, choosing
a different topology.
28. The one or more computer-readable storage media of claim 24
further comprising: responsive to determining a desired option is
not among the co-functional options for the video targets, choosing
a different topology.
29. The one or more computer-readable storage media of claim 24
further comprising: responsive to determining a desired option is
not among the co-functional options for the video targets, choosing
a different option for at least one of the video sources.
30. The one or more computer-readable storage media of claim 24
wherein: the co-functional options for the video sources are
co-functional with respect to the topology; and the co-functional
options for the video targets are co-functional with respect to the
topology.
31. At least one computing system programmed to carry out a method
comprising: selecting a topology for the video presenting network;
enumerating co-functional options for the video sources; from among
the co-functional options for the video sources, pinning options
for the video sources; enumerating co-functional options for the
video targets; and from among the co-functional options for the
video targets, pinning options for the video targets.
32. The at least one computing system of claim 31 wherein: the
co-functional options for the video sources are co-functional with
respect to the topology; and the co-functional options for the
video targets are co-functional with respect to the topology and
co-functional with respect to the pinned options for the video
sources.
33. The at least one computing system of claim 31 wherein pinning
options for the video sources comprises: pinning an option for a
first video source, wherein the pinning invalidates a configuration
option for a second video source; determining that the
configuration option for the second video source has been
invalidated; and unpinning the option for the first video source
responsive to determining that the configuration option for the
second video source has been invalidated.
34. The at least one computing system of claim 31 further
comprising: responsive to determining a desired option is not among
the co-functional options for the video sources, choosing a
different topology.
35. The at least one computing system of claim 31 further
comprising: responsive to determining a desired option is not among
the co-functional options for the video targets, choosing a
different topology.
36. The at least one computing system of claim 31 further
comprising: responsive to determining a desired option is not among
the co-functional options for the video targets, choosing a
different option for at least one of the video sources.
Description
RELATED APPLICATION DATA
[0001] This application claims the benefit of Milirud et al., U.S.
Provisional Application No. 60/567,053, entitled "VIDEO PRESENTING
NETWORK MANAGEMENT," filed Apr. 30, 2004, which is hereby
incorporated herein by reference.
TECHNICAL FIELD
[0002] The technical field relates to configuration of video
display adapters (e.g., computer video cards).
BACKGROUND
[0003] Computer systems using multiple monitors are becoming
widespread. For example, it is now common for a computer to drive
both an LCD panel and a projector device. Further, computer users
now routinely watch video presentations (e.g., DVDs) using their
computer. In such a case, the computer may be driving both a
conventional monitor and a television.
[0004] In response to demand, video adapter hardware manufacturers
now include multiple outputs on video adapters. In this way, a user
can more easily use a computer to drive desired devices without
having to switch cables for a single output and re-configure the
output.
[0005] Although such multi-monitor video adapters have a variety of
functionality, available configurations are typically limited.
Accordingly, there exists a need to improve functionality related
to configuring multi-monitor computer systems.
SUMMARY
[0006] Configuring a video presenting network having plural outputs
can be challenging, due to the sheer number of possible
configurations and configuration interdependencies among
resources.
[0007] A variety of technologies described herein can be used to
configure resources of a video presenting network having plural
outputs. For example, provisional configuration can be supported.
Configuration of inputs can be performed separately from
configuration of outputs. Traversal through possible configuration
solutions can include backtracking. For example, backtracking can
be used when a selected configuration option invalidates another
desired configuration option.
[0008] Interdependencies between network resources can be
considered to restrict provided options to those co-functional with
a provisional configuration. Responsibility for considering
interdependencies can be delegated to (e.g., performed by) a video
driver, such as a video miniport. A client can use a variety of
approaches to find a desired configuration. The desired
configuration can be treated as a solution to an NP-Complete graph
problem.
[0009] The foregoing and other features and advantages will become
more apparent from the following detailed description of disclosed
embodiments, which proceeds with reference to the accompanying
drawings.
BRIEF DESCRIPTION OF THE FIGURES
[0010] FIG. 1 is a block diagram showing an exemplary configurable
video presenting network.
[0011] FIG. 2 is a block diagram showing another exemplary
configurable video presenting network.
[0012] FIG. 3 is a block diagram showing combinations of
configurations for a video presenting network.
[0013] FIG. 4 is a flowchart showing a method of configuring a
configurable video presenting network, such as that shown in FIG.
1.
[0014] FIG. 5 is a table showing exemplary provisional
configuration of a video presenting network, such as that shown in
FIG. 1.
[0015] FIG. 6 is a block diagram showing an exemplary transactional
approach to achieving configuration of a video presenting network,
such as that shown in FIG. 1.
[0016] FIG. 7 is a flowchart showing an exemplary method for
performing configuration via a transactional approach.
[0017] FIG. 8A is a block diagram showing exemplary source for
feedback during a provisional configuration of a video presenting
network, such as that shown in FIG. 1.
[0018] FIG. 8B is a block diagram showing exemplary source for
feedback similar to FIG. 8A, but for plural resources.
[0019] FIGS. 9A, 9B, and 9C are block diagrams showing exemplary
co-functional options for a plurality of resources during
pinning.
[0020] FIGS. 10A, 10B, and 10C are block diagrams showing other
exemplary co-functional options for a plurality of resources during
pinning.
[0021] FIG. 11 is a block diagram showing an exemplary
transactional approach with feedback to achieve configuration of a
video presenting network, such as that shown in FIG. 1.
[0022] FIG. 12 is a flowchart showing an exemplary method for
performing configuration via a transactional approach with feedback
from a server perspective.
[0023] FIG. 13 is a flowchart showing an exemplary method for
performing configuration via a transactional approach with feedback
from a client perspective.
[0024] FIG. 14 is a block diagram showing an exemplary architecture
in which provisional configuration can be implemented.
[0025] FIG. 15 is a flowchart showing an exemplary method of
configuring a video presenting network.
[0026] FIG. 16 is a flowchart showing an exemplary method of
finding a desired configuration by systematic traversal of the
solution space to converge on a desired configuration.
[0027] FIGS. 17A-B are a flowchart showing a first exemplary
detailed method of finding a desired configuration by systematic
traversal of the solution space to converge on a desired
configuration.
[0028] FIGS. 18A-C are a flowchart showing a second exemplary
detailed method of finding a desired configuration by systematic
traversal of the solution space to converge on a desired
configuration.
[0029] FIG. 19 is a flowchart showing an exemplary method of
determining a topology for a video presenting network.
[0030] FIG. 20 is a block diagram showing calls between a client
and server to arrive at a configuration for a video presenting
network.
[0031] FIG. 21 is a block diagram showing integration of an
implementation of the technology into a computer system having a
plurality of video display devices.
[0032] FIG. 22 is a block diagram showing a client-server system
that takes priorities into account in determining a desired video
configuration.
[0033] FIG. 23 is a flowchart showing an exemplary method of
determining a desired video configuration in a client-server system
such as that in FIG. 22.
[0034] FIG. 24 is a flowchart showing an exemplary method of
finding a desired configuration by systematic traversal of the
solution space where the topology can be changed during execution
of the method.
[0035] FIG. 25 is a block diagram showing an exemplary
multi-monitor/multi-view system.
[0036] FIG. 26 is a diagram depicting a general-purpose computing
device constituting an exemplary system for implementing the
disclosed technology.
DETAILED DESCRIPTION
Example 1
Exemplary Video Presenting Network
[0037] FIG. 1 shows a configurable video presenting network 100.
The technologies described in any of the examples herein can be
used to configure the video presenting network 100.
[0038] The video presenting network 100 for use with the
technologies described herein can have one or more inputs 110A-110N
(e.g., a total of .SIGMA. inputs, .sigma.); two or more outputs
120A-120N (e.g., a total of T inputs, .tau.); and one or more
digital-video-input-representation-to-video-output-signal
converters 130A-130N (e.g., a total of K converters, .kappa.).
[0039] The inputs 110A-110N are sometimes called "sources" or
"surfaces." The outputs 120A-120N are sometimes called "targets."
The digital-video-input-representation-to-video-output-signal
converters are sometimes called "converters."
[0040] In addition to the inputs, converters, and outputs, the
video presenting network can include other resources 140 (e.g.,
video memory, bandwidth, memory capacity, and the like). The other
resources 140 can be used by the inputs, converters, and outputs to
achieve video presenting functionality.
[0041] The video presenting network 100 can be implemented in
hardware such as a video display adapter (e.g., video card). In
some cases, some resources may reside outside the adapter.
[0042] An exemplary computer system may include one or more video
views in digital form (e.g., which are written to by applications
of the computer system), which are used by the inputs 110A-110N.
The resulting signal coming from the plural outputs 120A-120N can
be used to drive plural video display devices.
Example 2
Exemplary Alternative Video Presenting Network
[0043] FIG. 2 shows another configurable video presenting network
200. The technologies described in any of the examples herein can
be used to configure the video presenting network 200.
[0044] In the example, multiple inputs can be used for a single
digital-video-input-representation-to-video-output-signal converter
(e.g., the inputs 210B and 210N are used as inputs to the converter
230N). Such a configuration can be useful in overlaying one video
signal on top of another by using a video output codec with two
inputs, wherein the first input is the primary content and the
second input is the overlaid content. In such a situation, the
position and size of the overlay can be specified as part of the
video present source mode for the video presenting network source
representing the overlaid content.
[0045] Video presenting networks can take many other forms, having
an arbitrary number of inputs, converters, and plural outputs.
Example 3
Exemplary Video Presenting Network Resources
[0046] In any of the examples herein, a resource can include video
presenting network inputs (e.g., sources or surfaces), video
presenting network outputs (e.g., targets), converters, video
memory, bandwidth, memory capacity, and the like.
[0047] The topology of a video presenting network is also sometimes
called a resource. For example, configuring a resource can include
simply choosing a topology without regard to choosing configuration
options for the individual resources involved in the topology.
Example 4
Exemplary Video Paths in a Video Presenting Network
[0048] A video presenting network 100 can have a plurality of video
paths. For example, as shown in FIG. 1, a path may be from the
input 110A, through the converter 130A, to the output 120A. Another
path may be from the input 110A through the converter 130A, to the
output 120B, and so forth.
[0049] The topology of the video presenting network 100 can be
configured so that there are different paths according to the
configuration. For example, instead of sending the output of the
converter 130N to the video output 120N, it could be routed to a
different video output (e.g., 120B) by changing a configuration
setting.
Example 5
Exemplary Video Presenting Network Inputs
[0050] In any of the examples described herein, the video inputs
(or "sources") can take any of a variety of forms, such as those
providing digital surfaces. In practice, the inputs can be
configured to use a variety of source modes. Such modes can include
parameters such as width, height, unit format, rasterized graphics
filtering technique, primary surface chain length, the like, or
some combination thereof.
Example 6
Exemplary Video Presenting Network Outputs
[0051] In any of the examples described herein, the video outputs
(or "targets") can take any of a variety of forms, such as those
providing output signals. A descriptor can be associated with the
outputs. The descriptor can indicate a format (e.g., DVI, HDMI,
HD-15, BNC, S-video, RF, RCA and the like) and HPD awareness. The
output can also be associated with a video encoding type.
Furthermore, an output can be configured to be in sync with another
output.
[0052] In practice, the outputs can be configured to use a variety
of target modes. Such modes can include parameters such as active
region (e.g., width and height), total region (e.g., width and
height), active region displacement, pixel encoding format,
vertical retrace frequency, horizontal retrace frequency, pixel
clock rate, content ordering, color primaries, white point
reference, color space transformation matrix, the like, or some
combination thereof.
Example 7
Exemplary Converters
[0053] In any of the examples herein, a
digital-video-input-representation-to-video-output-signal converter
can take the form of a video codec, a digital-to-analog converter,
or the like. Some converters are sharable. For example, in a clone
(e.g., mirror) mode, a codec may send its signal to two
outputs.
Example 8
Exemplary Interdependency of Resources
[0054] Although any number of configurations of the video
presenting network 100 are theoretically possible, only a limited
number of theoretical configurations are functional configurations.
In practice, the resources of the video presenting network 100 are
subject to configuration interdependency.
[0055] For example, configuring the video input 110A to be of a
particular type may consume a large amount of video memory. In such
a case, there may not be sufficient remaining memory for another
video input (e.g., 110N) to be of the same type. For example, it
may only be configurable to a type consuming less memory.
[0056] There are a wide variety of other interdependencies. For
example, the converters may only accept particular video input
types or produce particular video output types. So, a particular
input may not be functional in combination with a particular
converter, and so forth.
[0057] Thus, in practice, an obstacle to implementing a desired
configuration is that it may not be functional. Further, it is not
easy to determine which combinations are functional out of the
myriad of theoretically possible combinations for a video
presenting network having a plurality of video inputs, a plurality
of converters, and a plurality of video outputs (which can be
interconnected in a variety of ways).
[0058] FIG. 3 is a block diagram showing combinations of
configurable resources for a video presenting network. In the
example, the theoretically possible configurations 300 can be
assembled by connecting one or more of a configured first resource
302 (e.g., a video presenting network input), with one or more of a
configured second resource 304 (e.g., a video presenting network
converter), that are connected with one or more of a configured
third resource 306 (e.g., a video presenting network output). The
resulting set of theoretically possible configurations 310 is shown
as a vast collection of possibilities, some of which are
functional, and some of which are non-functional, depending on the
configuration of the resources therein.
[0059] Finding a solution for an optimal configuration in such a
vast solution space is a tri-partite graph matching problem, which
is an NP-Complete problem. Therefore, using a brute force approach
can be problematic when the number of possible configurations for
the resources exceeds a reasonable number.
Example 9
Exemplary Configuration
[0060] In any of the examples described herein, configuration of
resources can take a wide variety of forms, including selecting a
topology for a set of resources of the video presenting network or
selecting configuration options (e.g., modes) for one or more
resources in the network (e.g., whether or not the network is
interconnected).
Example 10
Exemplary Configuration Method
[0061] FIG. 4 shows an exemplary configuration method 400 which can
be used for any of the video presenting networks described herein
to achieve configuration. The method and any of the other methods
described herein can be implemented via computer-executable
instructions on one or more computer-readable media.
[0062] At 410, an indication of a configuration of a first resource
of the video presenting network is received. For example, a
configuration for a particular video input of the video presenting
network can be received.
[0063] At 420, separately from the indication of the configuration
of the first resource, an indication of a configuration for a
second resource of the video presenting network is received. For
example, a configuration for a particular video output of the
plurality of outputs of the video presenting network can be
received.
[0064] Then, at 430, the video presenting network is configured
according to the indications of configurations.
[0065] In practice, additional indications of configuration can be
separately received for any resources of the video presenting
network (e.g., for two different inputs, two different outputs, two
different converters, a converter and an output, and so forth).
[0066] Separately received indications can include those received
by using two different calls, such as those to a programmatic
interface (e.g., device driver interface calls). For example, two
different calls to a device driver can be used. Or, two different
parameters can be used in the same call. Or, one or more data
structures indicating separate values for the resources can be
used. Such calls can come from a client such as an operating
system.
[0067] In such a way, the resources of the video presenting network
can be independently configured. Such configuration can also
indicate a topology for the video presenting network (e.g., how the
resources are interconnected).
Example 11
Exemplary Provisional Configuration
[0068] Using a provisional configuration approach can facilitate a
variety of functionality, including finding a desirable
configuration among the myriad of possible functional
configurations. FIG. 5 shows a table 500 indicating provisional
configuration of a resource of a video presenting network such as
that shown in FIG. 1.
[0069] In the example, the resource .sigma..sub.1 has been
provisionally configured (e.g., configuration parameters for the
resource of the video presenting network are stored but the
configuration need not be fully functional). Such a provisional
configuration can be based on receipt of a partial configuration
(e.g., a configuration of a resource out of the video presenting
network resources or an indication of a topology for the video
presenting network). Configuration for all resources need not be
received for a provisional configuration. Because a configuration
without the full set of configuration parameters is typically not
yet functional, a provisional configuration is sometimes called
"semi-functional." Providing a partial configuration for a resource
is sometimes called "pinning" the resource. If desired, the partial
configuration can be removed (or overridden). Removing the partial
configuration is sometimes called "unpinning."
Example 12
Exemplary Transactional Configuration
[0070] A transactional approach to achieving configuration of a
video presenting network can be based on the described provisional
configuration. FIG. 6 shows an exemplary arrangement 600 for
achieving configuration of a video presenting network 630 (e.g.,
the video presenting network shown in FIG. 1) via a transactional
approach.
[0071] In the example arrangement 600, a client 610 can send
partial configuration information for a video presenting network to
a server 620. Upon receiving a commit, the server 620 can then
configure the video presenting network 630 according to the
indications of partial configuration.
[0072] FIG. 7 shows an exemplary method 700 for performing
configuration via a transactional approach. At 710, a series of
partial configurations for the video presenting network are
received (e.g., from a client by a server). The partial
configurations can be used to build a provisional functional
configuration.
[0073] At 720, the provisional functional configuration is
committed. The committing can implement the provisional functional
configuration in the video presenting network (e.g., the network
630).
[0074] A provisional functional configuration can be stored without
being implemented. For example, the configuration can be stored
without configuring the resources of the video presenting network
(e.g., until a commit configuration indication is processed).
Example 13
Exemplary Determination of Co-Functional Configuration Options
[0075] Due to interdependencies between the resources of a video
presenting network, some theoretically possible configuration
options may not be functional in light of a provisionally
functional configuration that has already been assembled. For
example, given that the resource .sigma..sub.1 has been
provisionally configured (e.g., as shown in FIG. 5), the
configuration options available for another resource of the video
presenting network (e.g., .sigma..sub..SIGMA.) may be
restricted.
[0076] FIG. 8A shows an exemplary set of configuration options 850
for a resource .sigma..sub..SIGMA., out of which only a subset 860
of configuration options are available (e.g., would result in a
functional configuration) in light of how another resource
.sigma..sub.1 has been provisionally configured. In such an
arrangement, the available configuration options are sometimes
described as "co-functional" with the other configuration options
(e.g., of the provisional functional configuration) or "not
invalidating" a provisional configuration.
[0077] The set of co-functional configuration options 860 for a
resource can be provided as feedback during provisional
configuration in a process sometimes called "enumeration." Such
feedback can then be used to make decisions regarding further
configuration (e.g., to further build the provisional functional
configuration or to backtrack to an earlier provisional functional
configuration).
[0078] In some cases, it may be desirable to remove a partial
configuration from the provisional functional configuration. For
example, it may be discovered that the provisional functional
configuration does not permit configuration of an as yet
un-configured resource in a desired way. Accordingly, any of the
configuration methods described herein can include receiving an
indication to remove a partial configuration from the provisional
functional configuration and remove the partial configuration
responsive to receiving the indication (or, simply a new partial
configuration, which overrides the old). In this way, a method can
backtrack (e.g., unpin a resource) to an earlier provisional
functional configuration (e.g., before committing the provisional
functional configuration).
Example 14
Exemplary Determination of Co-Functional Configuration Options for
Plural Resources
[0079] In practice, it may be desirable to determine co-functional
configuration options for plural resources at once. For example,
after a given topology is selected as part of a partial
configuration, it may be desirable to enumerate the configuration
options for video presenting network sources that are co-functional
with the selected topology.
[0080] FIG. 8B shows an arrangement in which co-functional
configuration options 880A, 880B, and 880C for respective resources
(e.g., .sigma..sub.1, .sigma..sub.2, and .sigma..sub.3) are
indicated, wherein configuration options for more than one resource
at a time are indicated. The co-functional configuration options
shown are co-functional with respect to the chosen topology. The
options may not be co-functional with respect to each other. For
example, choosing one of the co-functional options for a first
resource may invalidate (e.g., not be co-functional with) another
one of the co-functional options of another resource.
[0081] In the example, at least some of the original options (e.g.,
870A, 870B, and 870C) are no longer available (e.g., are not
co-functional) in light of the chosen topology. A similar
arrangement is possible when options are enumerated for other
resources (e.g., targets).
[0082] Such options can be enumerated by software (e.g., a video
driver). In any of the examples described herein, it may be
desirable to guarantee that if any of the enumerated options are
chosen for one resource, such a choice will be co-functional with
at least one (e.g., will not invalidate all) of the options for any
of the other resources.
Example 15
Exemplary Invalidation of Co-Functional Options During Pinning
[0083] In practice, after having enumerated the configuration
options (e.g., for a plurality of resources) co-functional with a
topology for a plurality of resources, such configuration options
can be included in a partial, provisional configuration. However,
pinning (e.g., provisionally choosing) one of the configuration
options for a first resource may invalidate (e.g., not be
co-functional with) another option for another resource.
[0084] FIGS. 9A-C show an example in which choosing a configuration
option for one resource invalidates a configuration option for
another resource. A topology can be chosen. FIG. 9A shows the
co-functional options 920A, 920B, and 920C (e.g., subsets of
theoretically possible options 910A, 920B, and 920C, respectively)
enumerated after having chosen a topology. Then, FIG. 9B shows that
a particular option 921 has been chosen (e.g., pinned) for a first
resource. As a result, some of the configuration options for the
other resources may no longer be available (e.g., they are
invalidated). In the example, an option no longer appears in 920B'.
In some cases, other options are invalidated. Or, perhaps none are
invalidated.
[0085] FIG. 9C shows that a particular option 922 has been chosen
(e.g., pinned) for another resource. As a result, some of the
configuration options for the remaining resources may no longer be
available. In the example, an option no longer appears in 920C''.
In some cases, some of the options for the first resource may also
be invalided (e.g., resulting in a set 920A', not shown). However,
in practice, after a resource has been pinned (e.g., a
configuration option has been chosen for the resource), the pinned
configuration option will not be invalidated by choosing another
one of the enumerated configuration options.
[0086] Due to the phenomenon illustrated in FIGS. 9A-9C, when
enumerating for plural resources, it may be necessary to check for
invalidated options after pinning a resource. Such can be performed
by re-enumeration.
Example 16
Exemplary Invalidation of Co-Functional Options During Another
Pinning Scenario
[0087] FIGS. 10A-C show another example in which choosing a
configuration option for one resource invalidates a configuration
option for another resource. A topology can be chosen. FIG. 10A
shows the co-functional options 1020A, 1020B, and 1020C (e.g.,
subsets of theoretically possible options 1010A, 1020B, and 1020C,
respectively) enumerated after having chosen a topology. Then, FIG.
10B shows that a particular option 1021 has been chosen (e.g.,
pinned) for a first resource. As a result, some of the
configuration options for the other resources may no longer be
available (e.g., they are invalidated). In the example, an option
no longer appears in 1020B'. In some cases, other options are
invalidated. Or, perhaps none are invalidated.
[0088] FIG. 10C shows that a particular option 1022 has been chosen
(e.g., pinned) for another resource. As a result, some of the
configuration options for the remaining resources may no longer be
available. In the example, an option no longer appears in 1020C''.
In some cases, some of the options for the first resource may also
be invalided (e.g., resulting in a set 1020A', not shown). However,
in practice, after a resource has been pinned (e.g., a
configuration option has been chosen for the resource), the pinned
configuration option will not be invalidated by choosing another
one of the enumerated configuration options. Many other scenarios
are possible.
Example 17
Exemplary Transactional Approach with Feedback
[0089] FIG. 11 shows an exemplary arrangement 1100 for achieving
configuration of a video presenting network 1130 (e.g., the video
presenting network shown in FIG. 1) via a transactional approach
with feedback.
[0090] In the example arrangement 1100, a client 1110 can send
partial configuration information for a video presenting network to
a server 1120. The partial configuration information can be for any
of the resources of the video presenting network. The partial
configuration can indicate a topology of the video presenting
network.
[0091] After receiving the configuration information (e.g., a
partial configuration, such as for a first resource), co-functional
configuration options (e.g., for a second resource) can be
provided. The co-functional configuration options can be for a
different resource than the partial configuration, for a resource
in a different path, and the like. The co-functional options can be
restricted (e.g., at least one non-co-functional option is removed)
based on the configuration information. As described herein, the
options can be provided via enumeration, and enumeration can be
done for plural resources at a time.
[0092] The co-functional configuration options for the other
resource(s) can be based on interdependencies between the resources
of the video presenting network. The client can select from among
the co-functional configuration options and continue to build a
provisional functional configuration.
[0093] Upon receiving a commit, the server 1120 can then configure
the video presenting network 1130 according to the indications of
partial configuration.
[0094] FIG. 12 shows an exemplary method 1200 for performing
configuration with feedback from a server perspective. The method
can operate via the arrangement shown in FIG. 11. At 1210, an
indication of a partial video network presenting configuration is
received. For example, the partial configuration can indicate a
configuration for a first resource of the video presenting
network.
[0095] At 1220, co-functional configuration options are indicated
(e.g., as described for FIG. 11A or 11B, above). Alternatively, all
configuration options may be indicated with the exception of one or
more non-co-functional configuration options, which would be
removed from the options indicated before the options are
indicated. The method can also include a commit (not shown) by
which the configuration is committed to the video presenting
network.
[0096] FIG. 13 shows an exemplary method 1300 for performing
configuration with feedback from a client perspective. The method
can operate via the arrangement shown in FIG. 11. At 1310, an
indication of a partial video presenting network configuration is
sent. For example, the partial configuration can indicate a
configuration for a first resource of the video presenting
network.
[0097] At 1320, a set of co-functional configuration options (e.g.,
as described for FIG. 11A or 11B, above) are indicated. Again, the
method can also include a commit (not shown) by which the
configuration is committed to the video presenting network.
Example 18
Exemplary Server Implementation in Video Driver
[0098] Determining co-functional configuration options can be
delegated to a video driver. In any of the examples described
herein, actions performed by the server can be performed by a video
driver (e.g., a video miniport).
[0099] FIG. 14 shows an exemplary architecture 1400 in which
provisional configuration with feedback can be implemented. The
example includes a client 1410 (e.g., an operating system, such as
the graphics subsystem, an application, or the like), a driver 1420
(e.g., a device-specific video driver operating in kernel mode)
with interdependency logic 1425, and a video adapter 1430, which
provides video output to plural display devices 1440A-1440N.
[0100] The video driver 1420 can serve as a server in any of the
examples described herein. The interdependency logic 1425 can
include functions for accepting partial configurations, enumerating
co-functional configuration options, and committing a
configuration.
[0101] In this way, a hardware vendor of a display adapter can
develop an appropriate driver 1420 that incorporates the
appropriate interdependency logic 1425 to aid in determining a
desirable video presenting network configuration.
Example 19
Exemplary Advantages
[0102] Implementing interdependency logic in a video driver, as
discussed above in Example 18, can simplify determining an
appropriate configuration by reducing the scope for a given
hardware implementation with a certain set of limitations. If the
logic were instead in the operating system, the task can be more
complex (e.g., need to be completely generic and support every
possible interdependency).
Example 20
Exemplary Configuration of Video Presenting Network
[0103] FIG. 15 shows an exemplary method 1500 for configuration of
a video presenting network via partial configuration. At 1504, a
topology for the video presenting network is chosen. At 1506,
configurations options for the sources are enumerated and pinned.
At 1508, configuration options for the targets are enumerated and
pinned. A commit (not shown) can be used to implement the
configuration.
[0104] In any of the examples herein, although sources are
sometimes shown as pinned before targets, such need not be the
case. For example, targets can be pinned before sources.
Example 21
Exemplary Traversal of Solution Space to Converge on Functional
Configuration
[0105] FIG. 16 shows a flowchart of an exemplary method 1600 of
traversing a graph of possible functional multiple video output
configuration combinations. Such a method can be used by a client
(e.g., the client 1410) interacting with a server (e.g., video
driver 1420). The example shows a video miniport, but another video
driver (e.g., video driver 1420) can be used.
[0106] The example also includes a fixed topology functional video
presenting network configuration search, but other examples may
include an option of changing the topology during the search. For
example, a topology may be desired to be changed after the pinning
of a video present source mode on a video presenting network source
invalidates at least one other video present source mode for
another video presenting network source.
[0107] At 1602, a desired video presenting network topology has
been selected.
[0108] At 1604, given the desired video presenting network
topology, a video miniport is queried for a video presenting
network configuration (e.g., topology) that supports at least one
monitor-supported video signal mode (e.g., all modes) on at least
one video presenting network target (e.g., all targets).
[0109] At 1606, the sets of available video present source modes on
at least one video present source (e.g., all sources) in the
obtained video presenting network configuration (e.g., topology)
are enumerated.
[0110] At 1608, a video present source mode is pinned on at least
one video presenting network source (e.g., all sources).
[0111] At 1610, it is determined whether there are any more video
presenting network sources on which a video present source mode is
to be pinned. If there is another video presenting network source
to be pinned, the process proceeds to 1612. Otherwise, the process
proceeds to 1614.
[0112] At 1612, it is determined whether any of the previously
enumerated video present source modes has been invalidated. If so,
the process returns to 1606. If not, the process returns to 1608.
In the example, at least one of the previously enumerated video
present source modes can be invalidated based on the selection of
another video present source mode, but not all of the video present
source modes can be invalidated by such a selection.
[0113] At 1614, the sets of available video present target modes on
at least one video present target (e.g., all targets) in the
obtained video presenting network configuration are enumerated.
[0114] At 1616, a video present target mode is pinned on at least
one video presenting network target (e.g., all targets).
[0115] At 1618, it is determined whether there are any more video
presenting network targets on which a video present target mode is
to be pinned. If there is another video presenting network target
to be pinned, the process proceeds to 1620. Otherwise, the process
proceeds to 1622.
[0116] At 1620, it is determined whether any of the previously
enumerated video present target modes has been invalidated. If so,
the process returns to 1614. If not, the process returns to
1616.
[0117] At 1622, a resulting functional video presenting network
configuration combination is committed.
Example 22
First Exemplary Detailed Traversal of Solution Space to Converge on
Functional Configuration
[0118] FIGS. 17A-B show a flowchart of a first exemplary detailed
method 1700 of traversing a graph of possible functional multiple
video output configuration combinations. Such a method can be used
by a client (e.g., the client 1410) interacting with a server
(e.g., video driver 1420). The example shows a video miniport, but
another video driver (e.g., video driver 1420) can be used.
[0119] At 1702, an initial video presenting network topology has
been provided.
[0120] At 1704, given the initial video presenting network
topology, a video miniport is queried for a video presenting
network configuration (e.g., topology) that supports at least one
monitor-supported video signal mode (e.g., all modes) on at least
one video presenting network target (e.g., all targets).
[0121] At 1706, a determination is made as to whether the video
presenting network topology specified by the query of 1704 is
supported. If the specified video presenting network topology is
supported, then the process proceeds to 1708. Otherwise, the
process proceeds to 1710.
[0122] At 1708, a determination is made as to whether the current
video presenting network topology is the most desired video
presenting network topology. If it is, then the process proceeds to
1712. Otherwise, the process proceeds to 1714.
[0123] At 1710, a determination is made as to whether at least one
other initial video presenting network topology exists. If so, then
the process returns to 1704. Otherwise, the process terminates at
1790 because there is no convergence to a functional configuration
combination with the desired search parameters.
[0124] At 1712, the sets of available video present source modes on
at least one video presenting network source (e.g., all sources) in
the obtained video presenting network configuration are enumerated.
The process then proceeds to 1722.
[0125] At 1714, the video presenting network topology is adjusted
to a new valid video presenting network topology by the addition or
removal of a video presenting path (e.g., multi-path). The process
then proceeds to 1716, where a determination is made as to whether
the new valid video presenting network topology is supported. If
so, then the process returns to 1708. Otherwise, the process
proceeds to 1718.
[0126] At 1718, a determination is made as to whether there is at
least one other desired video presenting network topology that can
be obtained by incremental changes through valid video presenting
network topologies. If so, the process proceeds to 1720. Otherwise,
the process terminates at 1790.
[0127] At 1720, a determination is made as to whether another
desired video presenting network topology is obtainable only by the
null topology (e.g., the topology cannot be further adjusted). If
so, the process returns to 1704. Otherwise, the process returns to
1714.
[0128] At 1722, a determination is made as to whether any of the
enumerated video present source modes are missing a mode desired
for the respective video presenting network source. If so, the
process proceeds to 1724. Otherwise, the process proceeds to
1732.
[0129] At 1724, a determination is made as to whether any video
presenting network sources have a video present source mode pinned.
If so, the process proceeds to 1728, where a pinned video present
source mode is unpinned, and then back to 1712. Otherwise, the
process proceeds to 1730. The video present source mode unpinning
at 1728 can be ordered according to video presenting network source
importance (e.g., the source modes can be prioritized from most to
least important).
[0130] At 1730, a determination is made as to whether there is at
least one other video present source mode available for a video
presenting network source. If so, the process returns to 1732,
where a video present source mode is pinned on at least one video
presenting network source (e.g., for all sources), and then to
1734. Otherwise, the process terminates at 1790. The video present
source mode pinning at 1732 can be ordered according to video
presenting network source importance (e.g., the source modes can be
prioritized from most to least important).
[0131] At 1734, it is determined whether there are any more video
presenting network sources on which a video present source mode is
to be pinned. If there is another video presenting network source
to be pinned, the process proceeds to 1736. Otherwise, the process
proceeds to 1738.
[0132] At 1736, it is determined whether any of the previously
enumerated video present source modes has been invalidated. If so,
the process returns to 1712. If not, the process returns to
1732.
[0133] At 1738, the sets of available video present target modes on
at least one video presenting network target (e.g., all targets) in
the obtained video presenting network configuration are
enumerated.
[0134] At 1742, a determination is made as to whether any of the
enumerated video present targets modes are missing a mode desired
for the respective video presenting network target. If so, the
process proceeds to 1744. Otherwise, the process proceeds to
1752.
[0135] At 1744, a determination is made as to whether any video
presenting network target has a video present target mode pinned on
it. If so, the process proceeds to 1748, where a pinned video
present target mode is unpinned, and then back to 1738. Otherwise,
the process proceeds to 1750. The video present target mode
unpinning at 1748 can be ordered according to video presenting
network target importance (e.g., the target modes can be
prioritized from most to least important).
[0136] At 1750, a determination is made as to whether there is at
least one other video present target mode available for a video
presenting network target. If so, the process returns to 1752,
where a video present target mode is pinned on at least one video
presenting network target (e.g., for all targets), and then to
1754. Otherwise, the process terminates at 1790. The video present
target mode pinning at 1752 can be ordered according to video
presenting network target importance (e.g., the target modes can be
prioritized from most to least important).
[0137] At 1754, it is determined whether there are any more video
presenting network targets on which a video present target mode is
to be pinned. If there is another video presenting network target
to be pinned, the process proceeds to 1756. Otherwise, the process
proceeds to 1780.
[0138] At 1756, it is determined whether any of the previously
enumerated video present target modes has been invalidated. If so,
the process returns to 1738. If not, the process returns to
1752.
[0139] At 1780, a resulting functional video presenting network
configuration combination is committed.
Example 23
Second Exemplary Detailed Traversal of Solution Space to Converge
on Functional Configuration
[0140] FIGS. 18A-C shows a flowchart of a first exemplary detailed
method 1800 of traversing a graph of possible functional multiple
video output configuration combinations. Such a method can be used
by a client (e.g., the client 1410) interacting with a server
(e.g., video driver 1420). The example shows a video miniport, but
another video driver (e.g., video driver 1420) can be used.
[0141] At 1802, an initial video presenting network topology has
been provided.
[0142] At 1804, given the initial video presenting network
topology, a video miniport is queried for a video presenting
network configuration (e.g., topology) that supports at least one
monitor-supported video signal mode (e.g., all modes) on at least
one video presenting network target (e.g., all targets).
[0143] At 1806, a determination is made as to whether the video
presenting network topology specified by the query of 1804 is
supported. If the specified video presenting network topology is
supported, then the process proceeds to 1808. Otherwise, the
process proceeds to 1810.
[0144] At 1808, a determination is made as to whether the current
video presenting network topology is the most desired video
presenting network topology. If it is, then the process proceeds to
1812. Otherwise, the process proceeds to 1814.
[0145] At 1810, a determination is made as to whether at least one
other initial video presenting network topology exists. If so, then
the process returns to 1804. Otherwise, the process terminates at
1890 because there is no convergence to a functional configuration
combination with the desired search parameters.
[0146] At 1812, the sets of available video present source modes on
at least one video presenting network source (e.g., all sources) in
the obtained video presenting network configuration are enumerated.
The process then proceeds to 1822.
[0147] At 1814, the video presenting network topology is adjusted
to a new valid video presenting network topology by the addition or
removal of a video presenting path (e.g., multi-path). The process
then proceeds to 1816, where a determination is made as to whether
the new valid video presenting network topology is supported. If
so, then the process returns to 1808. Otherwise, the process
proceeds to 1818.
[0148] At 1818, a determination is made as to whether there is at
least one other desired video presenting network topology that can
be obtained by incremental changes through valid video presenting
network topologies. If so, the process proceeds to 1820. Otherwise,
the process terminates at 1890.
[0149] At 1820, a determination is made as to whether another
desired video presenting network topology is obtainable only by the
null topology (e.g., the topology cannot be further adjusted). If
so, the process returns to 1804. Otherwise, the process returns to
1814.
[0150] At 1822, a determination is made as to whether any of the
enumerated video present source modes are missing a mode desired
for the respective video presenting network source. If so, the
process proceeds to 1824. Otherwise, the process proceeds to
1832.
[0151] At 1824, a determination is made as to whether any video
presenting network sources have a video present source mode pinned.
If so, the process proceeds to 1828, where a pinned video present
source mode is unpinned, and then back to 1812. Otherwise, the
process proceeds to 1830. The video present source mode unpinning
at 1828 can be ordered according to video presenting network source
importance (e.g., the source modes can be prioritized from most to
least important).
[0152] At 1830, a determination is made as to whether there is at
least one other video present source mode available for a video
presenting network source. If so, the process returns to 1832,
where a video present source mode is pinned on at least one video
presenting network source (e.g., for all sources), and then to
1834. Otherwise, the process proceeds to 1831. The video present
source mode pinning at 1832 can be ordered according to video
presenting network source importance (e.g., the source modes can be
prioritized from most to least important).
[0153] At 1831, a determination is made as to whether there is at
least one other video present source mode available for a video
presenting network source given any other desired video presenting
network topology. If so, the process returns to 1818. Otherwise,
the process terminates at 1890.
[0154] At 1834, it is determined whether there are any more video
presenting network sources on which a video present source mode is
to be pinned. If there is another video presenting network source
to be pinned, the process proceeds to 1836. Otherwise, the process
proceeds to 1838.
[0155] At 1836, it is determined whether any of the previously
enumerated video present source modes has been invalidated. If so,
the process returns to 1812. If not, the process returns to
1832.
[0156] At 1838, the sets of available video present target modes on
at least one video presenting network target (e.g., all targets) in
the obtained video presenting network configuration are
enumerated.
[0157] At 1842, a determination is made as to whether any of the
enumerated video present targets modes are missing a mode desired
for the respective video presenting network target. If so, the
process proceeds to 1844. Otherwise, the process proceeds to
1852.
[0158] At 1844, a determination is made as to whether any video
presenting network target has a video present target mode pinned on
it. If so, the process proceeds to 1848, where a pinned video
present target mode is unpinned, and then back to 1838. Otherwise,
the process proceeds to 1850. The video present target mode
unpinning at 1848 can be ordered according to video presenting
network target importance (e.g., the target modes can be
prioritized from most to least important).
[0159] At 1850, a determination is made as to whether there is at
least one other video present target mode available for a video
presenting network target given the current video presenting
network topology and video present source modes pinned on video
presenting network sources. If so, the process returns to 1852,
where a video present target mode is pinned on at least one video
presenting network target (e.g., for all targets), and then to
1854. Otherwise, the process proceeds to 1856. The video present
target mode pinning at 1852 can be ordered according to video
presenting network target importance (e.g., the target modes can be
prioritized from most to least important).
[0160] At 1854, it is determined whether there are any more video
presenting network targets on which a video present target mode is
to be pinned. If there is another video presenting network target
to be pinned, the process proceeds to 1868. Otherwise, the process
proceeds to 1880.
[0161] At 1856, a determination is made as to what is considered to
be more important: the current video presenting network topology or
the video present source modes currently pinned on video presenting
network sources. If the video present source modes currently pinned
on video presenting network sources are considered to be more
important, the process proceeds to 1862. If the current video
presenting network topology is considered to be more important, the
process proceeds to 1864.
[0162] At 1862, it is determined whether there is at least one
other desired video presenting network topology. If so, the process
returns to 1818. If not, the process proceeds to 1866.
[0163] At 1864, a determination is made as to whether there is at
least one other desired video present source mode given the current
video presenting network topology. If so, the process returns to
1828. Otherwise, the process proceeds to 1862.
[0164] At 1866, a determination is made as to whether there is at
least one other desirable video present source mode available on at
least one video presenting network source. If so, the process
proceeds to 1864. Otherwise, the process terminates at 1890.
[0165] At 1868, it is determined whether any of the previously
enumerated video present target modes has been invalidated. If so,
the process returns to 1838. If not, the process returns to
1852.
[0166] At 1880, a resulting functional video presenting network
configuration combination is committed.
Example 24
Exemplary Method of Achieving Goal Configuration
[0167] FIG. 19 shows a flowchart showing an exemplary method 1900
of determining a topology for a video presenting network in light
of a goal (e.g., stated in terms of video modes supported by
monitors).
[0168] At 1902, the process starts with an initial topology. At
1906, the initial topology is modified to better meet the goal
(e.g., by generating a provisional functional configuration better
meeting the goal). Such modifications can take into account
interdependencies among resources of the video presenting
network.
[0169] Possible goals can relate to video modes or other
configuration options. For example, a goal can be the best way to
route video presenting network targets to video presenting network
sources in a video presenting network through the available video
output codecs to maximize supported graphics video presenting
network source mode sets on its video presenting network sources,
given that video mode sets on the video presenting network targets
must support preferred modes on all the monitors connected to them.
Or, if such a goal cannot be attained, the goal can be the best way
to route video presenting network targets to video presenting
network sources in a video presenting network through the available
video output codecs to maximize supported graphics video presenting
network source mode sets on its video presenting network sources,
given that video mode sets on the video presenting network targets
must support preferred modes on the monitors connected to them in a
specified prioritization ordering. Or, if such a goal cannot be
attained, the goal can be the best way to route video presenting
network targets to video presenting network sources in a video
presenting network through the available video output codecs to
maximize supported graphics video presenting network source mode
sets on its video presenting network sources, given that video mode
sets on the video presenting network targets must support at least
one of the video modes supported by the monitors connected to
them.
[0170] If desired, a first goal can be attempted. Then, if the
first goal cannot be met, a second goal can be attempted, and so
forth. A goal is sometimes described as an "optimal"
configuration.
Example 25
Exemplary Additional Goals
[0171] In addition to the goals described above, other
configuration goals may be desired and can be facilitated by the
technologies described herein. For example, it might be of interest
to achieve the following, separately or in some combination:
[0172] 1. Maximize the special resolution on the render targets
[0173] 2. Maximize the color resolution on the render targets
[0174] 3. Maximize both spatial and color resolutions on one of the
render targets (e.g., for medical imaging applications, computer
assisted design, and the like).
[0175] 4. Match refresh rates on the monitors displaying a view
which contains a real-time television broadcast presentation to
avoid video stream synchronization issues. Such synchronization
issues can manifest themselves as artifacts, dropped frames (e.g.,
glitches), or both.
[0176] 5. Conserve the video memory bandwidth as much as possible
by driving views at lowest rendering modes acceptable to boost 3D
performance, assuming one or more GPUs are competing for the same
video memory bus.
[0177] Because such goals are beyond the scope of a simple video
driver, such goals can be achieved by placing decision-making
ability outside of the video driver (e.g., in the upper layers of
the operating system, such as in the shell, graphics subsystem, DX
runtime, and the like).
[0178] Due to the sheer amount of possible rendering modes, a
driver can not simply enumerate them. A query or a traversal
approach (e.g., such as described in the examples herein) can be
used to achieve configuration goals.
[0179] Still other goals can be classified as follows:
[0180] 1. In a mode optimized for image quality, one cares most
about displaying the image to the best degree possible.
[0181] 2. In a mode optimized for performance, one cares most about
not overloading the video memory bus (e.g., each codec has to read
from the video memory, and thus consumes video memory
bandwidth).
[0182] 3. In a mode optimized for power consumption, one may want
to choose the codec which consumes the least power, even if it can
not drive preferred modes on either of two monitors, turning all
other codecs off.
[0183] Typically, an implicit goal in any configuration is that the
video outputs support at least one mode supported by the respective
monitor. Unless overridden by performance or power management
considerations, it is typically a further goal that video outputs
try to support preferred modes of their respective monitors, where
the monitor's importance is prioritized by the client (e.g.,
operating system) as part of the configuration request.
[0184] For example, the present the same render target on multiple
views (e.g., clone view), the video driver should attempt to have
as many monitors to run in their preferred modes, only sharing
codecs when doing otherwise means one of the requested outputs can
not be driven.
[0185] For example, in a case involving three video outputs, but
only two codecs, it might be acceptable to share a codec when asked
to support all three outputs, even if at least one of the monitors
might not be running in its preferred mode. However, when asked to
support only two of the outputs, a codec should not be shared if
preferred modes can be achieved on both monitors by not sharing a
codec.
Example 26
Exemplary Goals Related to Power Consumption
[0186] In some scenarios, it may be desirable to specify goals with
respect to power consumption. For example, a configuration with
smaller power consumption may be preferred for economy power
states, and performance and/or image quality may be preferred when
in full-power states. In any of the examples herein, such goals can
be implemented.
Example 27
Exemplary Device Driver Interface
[0187] Example 45 lists a set of functions (e.g.,
EnumerateAvailVidPNTargets, ConstrainNodesOnVidPNTargets, etc.) and
their purposes. Such functions can be included in a device driver
interface supported by a video device driver (e.g., a video
miniport). The functions can be used by clients to build a video
presenting network in incremental fashion, employing various
algorithms (e.g., search algorithms).
Example 28
Exemplary Functions for Configuration Management
[0188] Example 45 details a set of functions for configuration
management. For example, a function (e.g., GetActiveVidPNTopology)
identifies a video presenting network configuration (e.g., a
topology). Another function (e.g., CommitVidPNImpl) commits a video
presenting network configuration. Another function (e.g.,
EnumCurrentlyAvailVidPNSourceModeSets) enumerates video present
source modes available given a desired video presenting network
configuration. Another function (e.g.,
EnumCurrentlyAvailVidPNTargetModeSets) enumerates video present
target modes available given a desired video presenting network
configuration. Another function (e.g., PinModeOnVidPNSource) pins a
video present source mode on a video presenting network source.
Another function (e.g., PinModeOnVidPNTarget) pins a video present
target mode on a video presenting network target. Another function
(e.g., UnpinModeOnVidPNSource) unpins a video present source mode
on a video presenting network source. Another function (e.g.,
UnpinModeOnVidPNTarget) unpins a video present target mode on a
video presenting network target. Another function (e.g.,
CreateVidPNImpl) creates a video presenting network configuration.
Any combination of the functions can be implemented as part of a
programmatic interface (e.g., a device driver interface). Such an
interface can provide access to the functions as a service (e.g.,
for client programs).
Example 29
Exemplary Calls to Arrive at Configuration
[0189] FIG. 20 shows a block diagram showing exemplary calls to
arrive at a configuration. Such calls can be implemented as part of
a device driver interface (DDI).
[0190] System 2000 includes communication between a driver 2002
(e.g., video miniport) and a graphics kernel subsystem 2004. Given
a specified video presenting network configuration,
EnumAvailVidPNTargets can be called to enumerate available video
presenting network targets supported by a given video card.
EnumAvailVidPNSources can be called to enumerate available video
presenting network sources supported by the given video card. These
two calls can be part of a system initialization. Alternatively,
these two calls can be part of a video adapter arrival event (e.g.,
PCI express or docking station hot-plug). In some situations, a
null video presenting network configuration modality can be
supported, signifying that all available video presenting targets
and sources should be reported (e.g., as is appropriate for
initialization).
[0191] IsMonitor Connected can be used to determine which of the
enumerated video presenting targets have a monitor connected to
them. GetMonitorDescriptor can be called for each of the connected
monitors to obtain each respective monitor's descriptor.
ConstrainModesOnVidPNTargets can be called to set video mode
constraints on each of the enumerated video presenting targets in
line with the monitor capabilities obtained from the monitors'
descriptors.
[0192] During video presenting network construction,
GetInitialVidPNImpl can optionally be called to obtain a video
presenting network provisional configuration recommended by the
video miniport. CreateVidPNImpl can be called to create a video
presenting network provisional configuration based on the optional
recommendation by the video miniport. Alternatively,
CreateVidPNImpl can create a video presenting network provisional
configuration disregarding the optional recommendation by the
miniport.
[0193] EnumCurrentlyAvailVidPNSourceModeSets, PinModeOnVidPNSource,
and UnpinModeOnVidPNSource can be called until video presenting
source modes are pinned on the video presenting network sources, as
part of creating a semi-functional video presenting network. If
video presenting source modes to be pinned are known to work for
the video presenting network sources, PinModeOnEachVidPNSource can
be called to pin video presenting source modes on all the video
presenting network sources at once.
[0194] EnumCurrentlyAvailVidPNTargetModeSets, PinModeOnVidPNTarget,
and UnpinModeOnVidPNTarget can be called until video presenting
target modes are pinned on the video presenting network targets, as
part of completing a functional video presenting network. If video
presenting target modes to be pinned are known to work for the
video presenting network targets, PinModeOnEachVidPNTarget can be
called to pin video presenting target modes on all the video
presenting network targets at once.
[0195] To commit a video presenting network provisional
configuration, CommitVidPNImpl may be called. A functional video
presenting network provisional configuration may be committed after
primary surface chains have been set up for each source in the
video presenting network. CommitVidPNImpl might require as input
other OS-owned resources outside of the video presenting network
topology and video presenting sources and targets (e.g., primary
surface chains).
Example 30
Exemplary Separation of Video Output and Render Target
[0196] An interface that a video rendering device driver exposes
(e.g., to an operating system, and thus indirectly to applications
running on the operating system) need not differentiate between the
notion of a video output on which the video rendering device is
physically driving the displayed image and a render target to which
the application is logically rendering the content it wants to be
presented as two separate, independent entities. The render target
can be implicitly and statically associated with each video output
on the video rendering device. However, such an approach can be
limiting.
[0197] In any of the examples described herein, an explicit notion
of a render target can be supported through the notion of a
rendering mode. A display mode that is the basic operational
modality descriptor of any device in an operating system can be
described as two things: a video mode, which is an output modality
descriptor (for an output or target, such as those shown in FIG. 1
or FIG. 25), and a rendering mode, which is an input modality
descriptor (for an input or source, such as those shown in FIG. 1
or FIG. 25). Such an approach is particularly useful in system with
multiple video outputs. Interfaces to the video driver (e.g., a
DDI) can allow separate specification of the video mode and the
rendering mode.
[0198] Thus, logical render targets can be dynamically managed
separately from the physical video outputs. The targets can be
mapped to video outputs of choice in run-time, redirecting them
from output to output as needed, or even mapping a single render
target simultaneously to multiple outputs.
Example 31
Exemplary Management for Monitor Arrival/Departure
[0199] Any of the technologies described herein can be applied to
scenarios in which a monitor is attached to or removed from a
system while it is running. For example, events (e.g., HPD events)
can be detected by a system when a monitor arrives or departs from
the system, and a configuration can be chosen accordingly. Also,
changes to redirect video streams to different outputs (e.g., for
clone view, extended desktop management, and the like) can be
implemented. Robust support for such dynamic configuration changes
can be accomplished by managing logical render targets separately
from the physical video outputs as described herein.
Example 32
Exemplary Integration of Technology
[0200] In any of the examples described herein, the video display
devices can take a variety of forms. For example, FIG. 21 shows an
exemplary integration of the technology into a computer system
having a plurality of video display devices.
[0201] FIG. 21 is a diagram of an exemplary high-level architecture
of a multiple video output device system 2100. A desktop 2110, a
display properties applet 2112, and a full-screen graphics
application 2114 communicate with a graphics subsystem 2120. The
graphics subsystem 2120 drives a video driver 2130 and another
video driver 2132. Both video drivers (e.g., video miniports)
communicate through a hardware abstraction layer (HAL) 2140 to
video adapters 2150 and 2152, which send outputted signals to any
combination of multiple video output devices. Such video output
devices can include a CRT monitor 2160, a flat-panel monitor 2162,
a digital projector 2164, an LCD monitor 2166, a pair of virtual
reality goggles 2168, and the like. Other combinations than those
shown are possible.
Example 33
Exemplary Traversal of Solution Space to Converge on Desired
Configuration
[0202] FIG. 22 shows a client-server system 2200 in which a video
configuration is determined based on priorities. A client 2202
communicates with a server 2204. The client 2202 contains
priorities 2206 that specify prioritization information.
[0203] Such prioritization information can include a list of one or
more desired topologies, a list of desired modes for respective
sources, a list of desired modes for respective targets, the like,
or some combination thereof. Prioritization information can also
include whether certain source modes are more important than
topology selection. Additionally, the source modes desired and the
target modes desired can be prioritized (e.g., from most to least
important).
[0204] Such priorities can be in the form of a prioritized list.
However, the priorities can also be achieved by incorporation into
logic (e.g., if-then statements in the client 2202).
[0205] FIG. 23 shows an exemplary method 2300 for determining a
video configuration based on a prioritized list of desired video
configuration options, such as in the system shown above in FIG.
22.
[0206] At 2302, a partial video configuration for at least a first
resource is submitted.
[0207] At 2304, a list of configuration options co-functional with
the partial video configuration is received.
[0208] At 2306, a determination is made as to whether a desired
option in the prioritized list is present in the list of
configuration options co-functional with the partial video
configuration.
[0209] At 2308, in response to a determination that the desired
option is not present, a modified partial configuration is
re-submitted for the first resource. In practice, a trade-of
between priorities may be desirable.
[0210] Detailed examples are included in the present application
(e.g., Appendix A at FIGS. 5 and 6).
Example 34
Exemplary Traversal of Solution Space to Converge on Desired
Configuration where Topology can be Changed
[0211] FIG. 24 shows a flowchart of another exemplary method 2400
of traversing a graph of possible functional multiple video output
configuration combinations. The example, however, includes the
possibility of changing the topology during determination of a
desired functional video presenting network provisional
configuration.
[0212] At 2402, a particular topology is selected.
[0213] At 2404, a video present source mode is selected and pinned
on a video present source.
[0214] At 2406, it is determined whether any video present target
modes are available (e.g., via enumeration). If so, the process
continues to 2408. If not, the process advances to 2410.
[0215] At 2408, a video present target mode is selected and pinned
on a video present target. The method can then end (e.g., after a
commit)
[0216] At 2410, it is determined whether having the previously
selected topology is more important than having the selected video
present source mode. If the answer is yes, a different video
present source mode is selected and pinned on the video present
source at 2412 and the process returns to 2406. If not, a different
topology is selected at 2414 and the process returns to 2404.
[0217] Although the example shows a trade-off between source mode
and topology, other trade-offs among resources are possible.
Further, as shown in some of the other example, desired options can
be prioritized.
[0218] The logic implemented in the example and demonstrated in
FIG. 24 may be altered to accommodate multiple video present
sources and/or multiple video present targets, similar to that
demonstrated above and in FIG. 16. For example, the logic
implemented at 2410-2414 in FIG. 24 can be inserted between 1608
and 1610 and/or between 1616 and 1618 in FIG. 16.
[0219] In the example, the search begins with an initial topology,
as is done at 2402 in FIG. 24. For video present paths in the
topology, a video present source mode can be pinned on the video
present path's video presenting network source before a video
present target mode can be pinned on the video present path's video
presenting network target. For example, a search can start with a
single source-view video present path, pin modes on both the source
and the target, and then grow the topology by adding another video
present path to it. Alternatively, the topology can be changed when
only the video present source mode is pinned.
Example 35
Exemplary Use of Configuration Service
[0220] Exemplary execution of the configuration service can proceed
to configure a video presenting network. The example assumes a
video presenting network with three sources in its topology and the
following video present source mode sets enumerated for each of the
three sources: [0221] 1. (1, {1, 640.times.480), (2,
800.times.600), (3, 1024.times.768), (4, 1280.times.1024)}) [0222]
2. (2, {1, 640.times.480), (2, 800.times.600), (3, 1024.times.768),
(4, 1280.times.1024) (5, 1600.times.1200), (6, 2000.times.1500)})
[0223] 3. (3, {1, 640.times.480), (2, 800.times.600), (3,
1024.times.768)})
[0224] Supposing the client is interested in getting the highest
possible spatial resolution on each of the video presenting network
sources, the first video presenting network source being most
important, the second video presenting network source being the
second-most important, and the third and last video presenting
network source being of least importance, it would proceed to pin
the highest mode on the first video presenting network source,
which is (4, 128.times.1024).
[0225] By doing so, however, the client invalidates modes (4,
1280.times.1024), (5, 1600.times.1200), and (6, 2000.times.1500) on
the second video presenting network source. Since the client isn't
yet aware of this, it will try and pin the highest mode previously
enumerated on the second video presenting network source (e.g., (6,
2000.times.1500)), which will fail with a status code stating that
the specified video present source mode has been invalidated.
[0226] At this point, the client will re-enumerate the available
video present source modes across all the video presenting network
sources, obtaining the following three sets: [0227] 1. (1, {1,
640.times.480), (2, 800.times.600), (3, 1024.times.768), (4,
1280.times.1024)}) [0228] 2. (2, {1, 640.times.480), (2,
800.times.600), (3, 1024.times.768)}) [0229] 3. (3, {1,
640.times.480), (2, 800.times.600), (3, 1024.times.768)})
[0230] The client would then proceed to pin the highest available
video present source mode on the second video presenting network
source (e.g., (3, 1024.times.768)). To support this additional
mode, however, the video card can no longer support neither (2,
800.times.600) nor (3, 1024.times.768) on the third video
presenting network source.
[0231] Again, not being aware of this fact, the client will try to
pin the highest mode previously enumerated for that video present
source (e.g., (3, 102 4.76 8)). Failing that, the client will
re-enumerate the available modes across all sources, getting:
[0232] 1. (1, {1, 640.times.480), (2, 800.times.600), (3,
1024.times.768), (4, 1280.times.1024)}) [0233] 2. (2, {1,
640.times.480), (2, 800.times.600), (3, 1024.times.768)}) [0234] 3.
(3, {1, 640.times.480)}) leaving it with only one mode choice for
the third and last video presenting network source.
[0235] At this point, the client can either accept this source mode
distribution and proceed to pin target modes to arrive at a
functional video presenting network, or it may decide that
640.times.480 spatial resolution isn't high enough for it and
backtrack to find a more suitable solution (e.g., one that perhaps
doesn't involve setting 1280.times.1024 spatial resolution on the
first video presenting network source, or alternatively, one that
has only 2 video presenting network sources in its topology).
[0236] The following marked-up list of modes summarizes the whole
process, with bold and underlined modes in each set representing
the pinned modes, single strikethrough modes representing the modes
invalidated when the mode on the first video presenting network
target was pinned, and double strikethrough modes representing the
modes invalidated when the mode on a second video presenting
network target was pinned:
##STR00001##
[0237] It can be noted that the above algorithm uses a simplistic
Greedy approach for rendering multi-mode convergence, and that it
doesn't employ back-tracking. A more complicated search (e.g., a
depth-first search) can be used by the client instead to find a
more optimal rendering multi-model. It can also be noted that the
above algorithm assumes a desired topology is fixed through the
convergence process, such as in the exemplary method 1600 in FIG.
16.
Example 36
Exemplary Multi-Monitor/Multi-View System
[0238] FIG. 25 is a diagram of an exemplary
multi-monitor/multi-view system 2500, which can be described using
the following formalism. Sometimes the term "VidPN" is used in
place of "video presenting network," and "video present" is used in
place of "video presenting." Also, the term "implementation" is
sometimes used to refer to a provisional configuration. The system
2500 can be used with any of the examples described herein. [0239]
1. M is a set of monitors 2510 m=(.delta..sub.M), where: [0240] a.
Monitor m is video presenting device that monitors the output of a
video rendering device, and [0241] b. .delta..sub.M.epsilon.{EDID
v1.0, EDID v1.1, EDID v1.2, EDID v1.3, EDID v1.3 with DIEXT} is a
monitor descriptor. [0242] 2. T is a set of video present targets
2520 t=(.delta..sub.T), of a video rendering device, where: [0243]
a. .delta..sub.T.epsilon.{(Format[.delta..sub.T],
HPD-aware[.delta..sub.T])} is a video present target descriptor,
where: [0244] i. Format[.delta..sub.T].epsilon.VC={DVI, HDMI,
HDMI-2, HD-15, BNC, 4-pin S-video, 7-pin S-video, RF, RCA
composite, 3 component RCA, Other} is a video output format type,
[0245] ii. HPD-awareness[.delta..sub.T].epsilon.HPD={Interruptible,
Non-Destructively Polled, Destructively Polled, None} is the video
output HPD-awareness, where video output has: [0246] 1.
Interruptible HPD-awareness iff (if and only if video miniport can
asynchronously notify the OS about monitor arrivals/departures.
[0247] 2. Non-Destructively Polled HPD-awareness iff video miniport
can report monitor arrivals/departures to the OS only by
periodically polling the underlying h/w, without causing visual
artifacts. [0248] 3. Destructively Polled HPD-awareness iff video
miniport can report monitor arrivals/departures to the OS only by
sporadically polling the underlying h/w, causing visual artifacts
on each poll. [0249] 4. No HPD-awareness iff video miniport is not
aware of monitor arrivals/departures and, hence, can not
asynchronously notify or synchronously report occurrences of such
events to the OS. [0250] b. Encoding.epsilon.(VE).sup.VC is a video
encoding type, where: [0251] i. VE.ident.{Digital_YCbCr,
Digital_RGB, Analog_YPbPr, Analog_RGB, Analog_YC, Analog_Composite,
Other} is a video encoding type, and [0252] Video output connectors
are mapped to respective video output encoding as specified in
Table 1, shown below (note: presence of DDC support implies
possibility to acquire a monitor descriptor, .delta..sub.M):
TABLE-US-00001 [0252] TABLE 1 Video Output Connectors to Output
Encoding Mapping Video output DDC connector type Video encoding
type support DVI Digital_RGB or Yes Digital_YCbCr HDMI Digital_RGB
or Yes Digital_YCbCr (+audio) HDMI-2 Digital_RGB or Yes
Digital_YCbCr (+audio) HD-15 Analog_RGB Sometimes BNC Analog_RGB or
No Analog_YPbPr 7-pin S-video Analog_YC Yes 4-pin S-video Analog_YC
No RCA composite Analog_Composite No 3 component RCA Analog YPbPr
No RF Analog_Composite No Other Other Unknown
[0253] c. Synchronized
[0253] : T 2 .fwdarw. { True , False } = { True : present target
modes on t 1 and t 2 are in sync False : otherwise ##EQU00001## is
a video output synchronization predicate, which, given two outputs,
determines whether they are in sync with each other or not. [0254]
3. K is a set of video presenting codecs 2530
.kappa.=(.delta..sub.K), where: [0255] a. .delta..sub.K is a video
codec descriptor. [0256] 4. E is a set of video present sources
2550 .sigma.=(.delta..sub..SIGMA.), where: [0257] a.
.delta..sub..SIGMA..epsilon.{Linear, Other} is a video present
source descriptor, and [0258] b. The content of each video
presenting network input that is presented on a monitor, is called
a view. [0259] 5. V is a set of views 2560 v=(.delta..sub.V),
where: [0260] a. .delta..sub.V.epsilon.{(Importance[.delta..sub.V],
Orientation[.delta..sub.V])} is a view descriptor, where: [0261] i.
Importance[.delta..sub.V]{Primary, Secondary, Other} [0262] ii.
Orientation[.delta..sub.V]{Left, Right, Center, Other} [0263] 6.
S=Z.sub.2.sub.32.ident.{0..0xffffffff} is a set of 32-bit spatial
coordinates. [0264] 7. .THETA. is a set of display modes
.theta.=(w.sub..THETA.,h.sub..THETA.,r.sub..THETA.,f.sub..THETA.),
where: [0265] a. w.sub..THETA..epsilon.S\{0} is the display mode
width. [0266] b. h.sub..THETA..epsilon.S\{0} is the display mode
height. [0267] c. r.sub..THETA..epsilon.R.sub..THETA. is the
display mode frame rate, where: [0268] i.
R.sub..THETA..ident.{a.b|a,b{1..0.times.FFFF}} is a set of display
mode frame rates in Hz. [0269] d.
f.sub..THETA..epsilon.F.sub..THETA. is the display mode unit
format, (i.e. effective color resolution of the monitor--a physical
parameter that is a function of the monitor technology), where:
[0270] i. F.sub..SIGMA..ident.{1bit, 5bit, 6bit, 8bit, 10bit,
12bit, 16bit, 18bit, 32bit, TBD} is a set of display mode color
resolutions. [0271] e.
g.sub..THETA..epsilon.[1..0,+.infin.).orgate.{SD-601, HD-709} is
the monitor transfer function (i.e. monitor gamma) which is a
function of the monitor technology's intensity response. [0272] 8.
B is a set of video present target modes, [0273]
.beta.=(A.sub.B,T.sub.B,.DELTA.(A.sub.BT.sub.B),f.sub.B,vr.sub.B,hr.sub.B-
,cr.sub.B,o.sub.B,cp.sub.B,g.sub.B,T.sub.B,YUV.fwdarw.RGB,bpo.sub.B,wpo.su-
b.B,pm.sub.B), also known as present target modes, where: [0274] a.
A.sub.B.epsilon.{(Width[A.sub.B], Height[A.sub.B])} is the video
present target mode active region, where: [0275] i. Width[A.sub.B]
is video present mode active region width. [0276] ii.
Height[A.sub.B] is video present mode active region height. [0277]
b. T.sub.B.epsilon.{(Width[T.sub.B], Height[T.sub.B])} is the video
present target mode total region, where: [0278] i. Width[T.sub.B]
is video present mode total region width. [0279] ii.
Height[T.sub.B] is video present mode total region height. [0280]
c. .DELTA.(A.sub.BT.sub.B).epsilon.{(OffsetHoriz[A.sub.B,T.sub.B],
OffsetVert[A.sub.B,T.sub.B])} is the video present target mode's
active region displacement, where: [0281] i.
OffsetHoriz[A.sub.B,T.sub.B] is video present mode's horizontal
active region displacement. [0282] ii. OffsetVert[A.sub.B,T.sub.B]
is video present mode's vertical active region displacement. [0283]
d. f.sub.B.epsilon.F.sub.B=F.sub.B,analog.orgate.F.sub.B,digital is
the video mode pixel encoding format, where: [0284] i.
F.sub.B,digital.ident.{Y10Cb10Cr10, Y8Cb8Cr8, sR10G10B10, sR8G8B8}
is a set of digital video mode pixel encoding formats. [0285] ii.
F.sub.B,analog.ident.{YPbPr, Analog_YC, Analog_Composite, RGB} is a
set of analog video mode pixel encoding formats. [0286] e.
vr.sub.B.epsilon.VR.sub.B is the vertical refresh rate, also known
as Vsync rate, or vertical retrace frequency, where: [0287] i.
VR.sub.B.ident.{a.b|a,b{1.0xFFFFFFFF}} is a set of rational
vertical refresh rates in Hz, usually found in the range of 50 to
200 Hz. [0288] f. hr.sub.B.epsilon.HR.sub.B is the horizontal
refresh rate, also known as Hsync rate, line rate, or horizontal
retrace frequency, where: [0289] i.
HR.sub.B.ident.{a.b|a,b{1.0xFFFFFFFF}} is a set of fractional
horizontal refresh rates in Hz, usually found in the range of 10 to
200 KHz. [0290] g. cr.sub.B.epsilon.CR.sub.B is the pixel clock
rate, where: [0291] i. CR.sub.B.ident.{a|a{1.0xFFFFFFFF}} is a set
of pixel clock rates in Hz, usually found in the range of 1 to 500
MHz. [0292] h. o.sub.B.epsilon.O.sub.B is the content ordering,
where: [0293] i. O.sub.B.ident.{Progressive,
Interlaced_upperFieldFirst, Interlaced_lowerFieldFirst} is a set of
content ordering types, where for progressive content ordering
field rate=Vsync rate, and for interlaced content ordering field
rate=2.times.Vsync rate. [0294] i. cp.sub.B.epsilon.CP.sub.B are
the color primaries. (3 primaries in (x,y), where x=X/(X+Y+Z) and
y=Y/(X+Y+Z) which are relative to some spec.). [0295] j.
wpr.sub.B.epsilon.CP.sub.B is the white point reference (i.e.
reference white). [0296] k.
g.sub.B.epsilon.[1.0,+.infin.).orgate.{SD-601,HD-709} is the
transfer function's exponent (i.e. gamma coefficient). [0297] l.
T.sub.B,YUV.fwdarw.RGB is the color space transformation matrix
from Y'U'V' to R'G'B'. [0298] m. bpo.sub.B.epsilon. is the black
point offset (i.e. setup voltage). [0299] n. wpo.sub.B.epsilon. is
the white point offset. [0300] o.
pm.sub.B.epsilon.Z.sub.2.sub.8.ident.{0..0xff} is the video present
target mode preference ordinal, where mode preference is
represented via the {0x01..0xff} range with 0x01 signifying the
most preferred and 0xff--the least preferred mode or irrelevant
mode preference. 0x00 is reserved for uknown/not initialized.
[0301] Certain video modes are defined through an industry-wide
standardization (both de-facto and formal). These modes can include
those listed in Table 2 below, as well as the following continuous
set of modes defined by the VESA Generalized Timing Formula
(GTF):
.beta..sub.GTF.ident..beta..sub.GTF,VR.orgate..beta..sub.GTF,HR.orgate..-
beta..sub.GTF,CR
[0302] where: [0303]
.beta..sub.GTF,VR.ident.{(vr.sub.B,GTF.sub.VR.sub.B.sub..fwdarw.HB.sub.B(-
vr.sub.B,o.sub.B,w.sub.B,h.sub.B),GTF.sub.VR.sub.B.sub..fwdarw.CR.sub.B(vr-
.sub.B,o.sub.B,w.sub.B,h.sub.B))|vr.sub.B.epsilon.VR.sub.B} [0304]
.beta..sub.GTF,HR.ident.{(GTF.sub.HR.sub.B.sub..fwdarw.VR.sub.B(hr.sub.B,-
o.sub.B,w.sub.B,h.sub.B),hr.sub.B,GTF.sub.HR.sub.B.sub..fwdarw.CR.sub.B(hr-
.sub.B,o.sub.B,w.sub.B,h.sub.B))|hr.sub.B.epsilon.HR.sub.B} [0305]
.beta..sub.GTF,CR.ident.{(GTF.sub.CR.sub.B.sub..fwdarw.HR.sub.B(cr.sub.B,-
o.sub.B,w.sub.B,h.sub.B)GTF.sub.CR.sub.B.sub..fwdarw.VR.sub.B(vr.sub.B,o.s-
ub.B,w.sub.B,h.sub.B),cr.sub.B)|cr.sub.B.epsilon.CR.sub.B}
TABLE-US-00002 [0305] TABLE 2 Modes YUV-> RGB Width Height Vsync
rate Hsync rate Pixel clock Transfer Content Name (Pixels) (Pixels)
Pixel Encoding Format (Hz) (Hz) rate (Hz) Matrix Ordering NTSC_M
720 525 YPbPr 60000/1001 15,734.27 3,579,545 601 Interlaced
Analog_YC Analog_Composite NTSC_J 720 525 Same 60000/1001 15,734.27
3,579,545 601 Interlaced NTSC_443 720 525 Same 60000/1001 15,734.27
4,433,618.75 601 Interlaced PAL_B 720 625 YPbPr 50 15,625
4,433,618.75 601 Interlaced Analog_YC Analog_Composite
RGB601_compositeSync PAL_B1 720 625 Same 50 15,625 4,433,618.75 601
Interlaced PAL_G 720 625 Same 50 15,625 4,433,618.75 601 Interlaced
PAL_H 720 625 Same 50 15,625 4,433,618.75 601 Interlaced PAL_I 720
625 Same 50 15,625 4,433,618.75 601 Interlaced PAL_D 720 525 Same
60000/1001 15,734 3,575,611.49 601 Interlaced PAL_N 720 625 Same 50
15,625 4,433,618.75 601 Interlaced PAL_NC 720 625 Same 50 15,625
3,582,056.25 601 Interlaced SECAM_B 720 625 Same 50 15,625 601
Interlaced SECAM_D 720 625 Same 50 15,625 601 Interlaced SECAM_G
720 625 Same 50 15,625 601 Interlaced SECAM_H 720 625 Same 50
15,625 601 Interlaced SECAM_K 720 625 Same 50 15,625 601 Interlaced
SECAM_K1 720 625 Same 50 15,625 601 Interlaced SECAM_L 720 625 Same
50 15,625 601 Interlaced SECAM_L1 720 625 Same 50 15,625 601
Interlaced EIA_861_1 720 480 YPbPr (NTSC timing) 60000/1001 601
Interlaced Y8Cb8Cr8 Y10Cb10Cr10 (R10G10B10 future) EIA_861_2 640
480 Same 60000/1001 601 Progressive EIA_861_3 720 480 Same
60000/1001 601 Progressive EIA_861_4 1280 720 Same 60000/1001 709
Progressive EIA_861_5 1920 1080 Same 60000/1001 709 Interlaced
EIA_861_6 720 480 YPbPr 60 601 Interlaced Y8Cb8Cr8 Y10Cb10Cr10
(R10G10B10 future) EIA_861_7 640 480 Same 60 601 Progressive
EIA_861_8 720 480 Same 60 601 Progressive EIA_861_9 1280 720 Same
60 709 Progressive EIA_861_10 1920 1080 Same 60 709 Interlaced
EIA_861A_1 720 576 YPbPr (PAL timing) 50 601 Interlaced sRGB
Y8Cb8Cr8 Y10Cb10Cr10 (sR10G10B10 future) EIA_861A_2 720 576 Same 50
601 Progressive EIA_861A_3 1280 720 Same 50 709 Progressive
EIA_861A_4 1920 1080 Same 50 709 Interlaced EIA_861B_1 1920 1080
YPbPr 24000/1001 709 Progressive sRGB Y8Cb8Cr8 Y10Cb10Cr10
(sR10G10B10 future) EIA_861B_2 1920 1080 Same 24 709 Progressive
EIA_861B_3 1920 1080 Same 25 709 Progressive EIA_861B_4 1920 1080
Same 30000/1001 709 Progressive EIA_861B_5 1920 1080 Same 30 709
Progressive EIA_861B_6 1920 1080 Same 50 709 Progressive EIA_861B_7
1920 1080 Same 60 709 Progressive IBM_1 720 400 sRGB 70 N/A
Progressive IBM_2 720 400 Same 88 N/A Progressive IBM_3 640 480
Same 60 N/A Progressive IBM_4 1024 768 Same 87 N/A Interlaced
APPLE_1 640 480 Same 67 N/A Progressive APPLE_2 832 624 Same 75 N/A
Progressive APPLE_3 1152 870 Same 75 N/A Progressive VESA_1 640 480
Same 72 N/A Progressive VESA_2 640 480 Same 75 N/A Progressive
VESA_3 800 600 Same 56 N/A Progressive VESA_4 800 600 Same 60 N/A
Progressive VESA_5 800 600 Same 72 N/A Progressive VESA_6 800 600
Same 75 N/A Progressive VESA_7 1042 768 Same 60 N/A Progressive
VESA_8 1042 768 Same 70 N/A Progressive VESA_9 1042 768 Same 75 N/A
Progressive VESA_10 1280 1024 Same 75 N/A Progressive VDMT_1 640
350 Same 85 37,900 31,500,000 N/A Progressive VDMT_2 640 400 Same
85 37,900 31,500,000 N/A Progressive VDMT_3 720 400 Same 85 37,900
35,500,000 N/A Progressive VDMT_4 640 480 Same 60 31,500 25,175,000
N/A Progressive VDMT_5 640 480 Same 72 37,900 31,500,000 N/A
Progressive VDMT_6 640 480 Same 75 37,500 31,500,000 N/A
Progressive VDMT_7 640 480 Same 85 43,300 36,000,000 N/A
Progressive VDMT_8 800 600 Same 56 35,100 36,000,000 N/A
Progressive VDMT_9 800 600 Same 60 37,900 40,000,000 N/A
Progressive VDMT_10 800 600 Same 72 48,100 50,000,000 N/A
Progressive VDMT_11 800 600 Same 75 46,900 49,500,000 N/A
Progressive VDMT_12 800 600 Same 85 53,700 56,250,000 N/A
Progressive VDMT_13 1024 768 Same 43 35,500 44,900,000 N/A
Interlaced VDMT_14 1024 768 Same 60 48,400 65,000,000 N/A
Progressive VDMT_15 1024 768 Same 70 56,500 75,000,000 N/A
Progressive VDMT_16 1024 768 Same 75 60,000 78,750,000 N/A
Progressive VDMT_17 1024 768 Same 85 68,700 94,500,000 N/A
Progressive VDMT_18 1152 864 Same 75 67,500 108,000,000 N/A
Progressive VDMT_19 1280 960 Same 60 60,000 108,000,000 N/A
Progressive VDMT_20 1280 960 Same 85 85,900 148,500,000 N/A
Progressive VDMT_21 1280 1024 Same 60 64,000 108,000,000 N/A
Progressive VDMT_22 1280 1024 Same 75 80,000 135,000,000 N/A
Progressive VDMT_23 1280 1024 Same 85 91,100 157,500,000 N/A
Progressive VDMT_24 1600 1200 Same 60 75,000 162,000,000 N/A
Progressive VDMT_25 1600 1200 Same 65 81,300 175,500,000 N/A
Progressive VDMT_26 1600 1200 Same 70 87,500 189,000,000 N/A
Progressive VDMT_27 1600 1200 Same 75 93,800 202,500,000 N/A
Progressive VDMT_28 1600 1200 Same 85 106,300 229,500,000 N/A
Progressive VDMT_29 1792 1344 Same 60 83,640 204,750,000 N/A
Progressive VDMT_30 1792 1344 Same 75 106,270 261,000,000 N/A
Progressive VDMT_31 1856 1392 Same 60 86,330 218,250,000 N/A
Progressive VDMT_32 1856 1392 Same 75 112,500 288,000,000 N/A
Progressive VDMT_33 1920 1440 Same 60 90,000 234,000,000 N/A
Progressive VDMT_34 1920 1440 Same 75 112,500 297,000,000 N/A
Progressive
[0306] 9. .GAMMA. is a set of video present source modes,
.gamma.=(w.sub..GAMMA.,h.sub..GAMMA.,f.sub..GAMMA.,.phi..sub..GAMMA.,n.su-
b..GAMMA.,pm.sub..GAMMA.), also known as present source modes,
where: [0307] a. w.sub..GAMMA..epsilon.S\{0} is a video present
source mode width. [0308] b. h.sub..GAMMA..epsilon.S\{0} is a video
present source mode height. [0309] c.
f.sub..GAMMA..epsilon.F.sub..GAMMA. is a video present source mode
unit format, where: [0310] i. F.sub..GAMMA. is a set of video
present source mode unit formats, which can be categorized into two
major subclasses: [0311] 1. Graphics video present source mode unit
formats, as defined by D3DFORMAT enum type in the latest DirectX
release. [0312] 2. Text video present source mode unit formats, as
defined by TBD. [0313] d.
.phi..sub..GAMMA..epsilon..PSI..sub..GAMMA. is a rasterized
graphics filtering technique used during rendering, where: [0314]
i. .PSI..sub..GAMMA. is a set of rasterized graphics filtering
techniques, as defined by D3DDDIMULTISAMPLE_TYPE enum type in the
latest DirectX release. [0315] e. n.sub..GAMMA..epsilon.N is the
primary surfaces chain length (i.e. number of surfaces in the
primary surfaces chain). [0316] f.
pm.sub..GAMMA..epsilon.Z.sub.2.sub.8.ident.{0 . . 0xff} is the
video present source mode preference ordinal, where mode preference
is represented via the {0x01..0xff} range with 0x01 signifying the
most preferred and 0xff--the least preferred mode or irrelevant
mode preference. 0x00 is reserved for unknown/not initialized.
[0317] 10. .rho..sub.MT.epsilon.T.sup.M is a monitor connectivity
topology--i.e. mapping from monitors to the video present targets
they are connected to. [0318] 11. .rho..sub.TK.epsilon.K.sup.T is a
video present targets-to-codecs topology--i.e. mapping from video
present targets to video present codecs driving them--defined by a
programmable cross-bar on the video card. [0319] 12.
.rho..sub.K.SIGMA..epsilon..SIGMA..sup.K is a video present
codecs-to-sources topology--i.e. mapping from video present codecs
to video video present sources from which the codecs are streaming
visual content. [0320] 13. .rho..sub.T.SIGMA..epsilon..SIGMA..sup.T
is a video present targets-to-sources topology 2540--i.e. mapping
from video present sources, from which its underlying video output
codecs are streaming visual content, to video present targets, to
which that content is being streamed to . . . [0321] 14.
P.sub.TK.SIGMA..ident.{.rho..sub.IK.SIGMA.|(.rho..sub.IK.SIGMA..ident..rh-
o..sub.IK.smallcircle..rho..sub.K.SIGMA.)supported(.rho..sub.IK)supported(-
.rho..sub.K.SIGMA.).rho..sub.IK.SIGMA. implements is a set of
supported VidPN topologies--i.e. a mapping from a pair consisting
of the set of video present targets and the set of video present
sources, (T.sub.1,.SIGMA..sub.1).epsilon.(T).times.(.SIGMA.), to
the respective set of the supported VidPN implementations for that
pair, where each implementation specifies explicitly the way in
which video present sources are routed through the video output
codecs to the video present targets they are driving. [0322] 15.
.GAMMA..epsilon.{(T.sub..GAMMA.,.SIGMA..sub..GAMMA.,.rho..sub.T.sub..GAMM-
A..sub..SIGMA..sub..GAMMA.)|(T.sub..GAMMA..OR
right.T)(.SIGMA..sub..GAMMA..OR
right..SIGMA.).E-backward..sub..rho..sub.IK.SIGMA..sub..epsilon.P.sub.TK.-
SIGMA.(.rho..sub.T.sub..GAMMA..sub..SIGMA..sub..GAMMA.=.rho..sub.TK.SIGMA.-
)} is called a VidPN implementation, where: [0323] a.
T.sub..GAMMA..epsilon.(T) is the set of VidPN video present
targets. [0324] b. .SIGMA..sub..GAMMA..epsilon.(.SIGMA.) is the set
of VidPN video present sources. [0325] c.
.rho..sub.T.sub..GAMMA..sub..SIGMA..sub..GAMMA..epsilon..SIGMA..sup.T
is the VidPN topology. [0326] 16.
.rho..sub..SIGMA.V.epsilon.V.sup..SIGMA. and
.rho..sub.V.SIGMA..epsilon..SIGMA..sup.V are the 1:1
correspondences between views and the underlying video present
sources--i.e. .rho..sub..SIGMA.V and .rho..sub.V.SIGMA. are
isomorphisms between .SIGMA. and V. [0327] 17. {right arrow over
(B)}.sub.K.epsilon.(B).sup.K is a multi-codec video present target
mode set vector--i.e. mapping from video output codecs to the video
present target mode sets they support. [0328] 18. {right arrow over
(B)}.sub.T.epsilon.(B).sup.T is a multi-target video present target
mode set vector--i.e. mapping from video present targets to the
video present target mode sets they support. [0329] 19. {right
arrow over (B)}.sub.M.epsilon.(B).sup.M is a multi-monitor video
monitor source mode set vector--i.e. mapping from monitors to the
video monitor source mode sets they support. [0330] 20. {right
arrow over (.GAMMA.)}.sub.T.epsilon.(.GAMMA.).sup.T is a
multi-source video present source mode set vector--i.e. mapping
from video present sources to the video present source mode sets
they support. [0331] 21. {right arrow over
(.beta.)}.sub.K.epsilon.B.sup.K is a multi-codec video present
target mode vector--i.e. mapping from video output codecs to the
video present target modes which these codecs are driving on the
video present targets' video outputs to which they are connected.
[0332] 22. {right arrow over
(.beta.)}.sub.T.ident.(.rho..sub.TK.smallcircle.{right arrow over
(.beta.)}.sub.K).epsilon.B.sup.Tis a multi-output video present
target mode vector--i.e. mapping from video present targets to the
video present target modes being driven on their video present
targets by the video output codecs they are connected to. [0333]
23. {right arrow over
(.beta.)}.sub.M.ident.(.rho..sub.MT.smallcircle.{right arrow over
(.beta.)}.sub.T).epsilon.B.sup.M is a multi-monitor video present
target mode vector--i.e. mapping from monitors to the video present
target mode being driven on them by the video present targets they
are connected to. [0334] 24. {right arrow over
(.theta.)}.sub.M.times.B.epsilon..THETA..sup.M.times.B is a
multi-monitor display mode vector--mapping from monitors to the
display modes being displayed on them as the result of the
underling video present target mode driven on the monitors' inputs.
[0335] 25. {right arrow over
(.gamma.)}.sub..SIGMA..epsilon..GAMMA..sup..SIGMA. is a
multi-source video present source vector--i.e. mapping from video
present sources to the video present source modes these sources are
set to. [0336] 26. A VidPN implementation is said to be
semi-functional iff video present source modes have been
successfully selected on all of its video present sources. [0337]
27. A VidPN implementation is said to be functional iff it is
semi-functional and video present target modes have been
successfully selected on all of its video present targets.
Example 37
Exemplary Definitions
[0338] Given the complicated set of interdependencies involved, a
number of formal definitions can be used for some implementations.
Certain (view, output) pairs may be factored into video present
sources, which can represent inputs into video output codecs (e.g.,
CRTC DAC, TMDS) and video present targets, which can represent
video outputs on a video card (e.g., HD-15, DVI, S-video).
[0339] A display mode may be factored into a video present source
mode, which can specify the primary surface format via which a
graphics stack is providing rendered content to be presented for a
user, and a video present target mode, which can specify a video
signal format driven on a respective video output.
[0340] Video presenting capabilities of a multiple-output video
card are modeled via the notion of a Video Present Network (VidPN),
which can relate a set of video present sources to a set of video
present targets via a VidPN topology. A VidPN may be considered
semi-functional iff video present source modes are pinned on each
of its video present sources. A VidPN may be considered functional
iff it is semi-functional, and video present target modes are
pinned on each of its video present targets.
[0341] Association between a single video present source and a
single video present target can be called a video present path.
Association between a single video present source and multiple
video present targets can be called a video present multipath.
[0342] With the preceding definitions in place, a video miniport's
job, in the context of display mode management, can be described as
managing an active VidPN that represents a state of a video present
configuration on a respective video card it is driving, as well as
servicing clients' requests aimed at incrementally building
functional VidPNs, each of which could be set as active.
Example 38
Exemplary Multiple Video Output Display Mode Solution
[0343] Changing display modes on monitors attached to a
multiple-output video card may no longer suffer from a
"single-output operation" view of the world, where video miniport
developers had to implement complex synchronization among certain
video driver stacks that were driving the same underlying physical
device, and may be superseded with an explicit transaction-based
commit of a functional VidPN implementation on a given video card
serviced by a single video driver stack.
[0344] A multiple output video display mode solution may depend on
multiple criteria such as: (a) hardware limitations (e.g., video
mode sets supported by monitors connected to respective video
present targets); (b) operational mode considerations (e.g.,
specific video modes preferred by monitors connected to respective
video present targets); (c) performance considerations (e.g.,
rendering performance improvements achieved through reduction of
contention for a video memory bus by video output codecs); (d)
power management considerations (e.g., reduction of a video card's
power consumption achieved by disabling unutilized video output
codecs, and throttling down its capabilities); (e) heat dissipation
considerations (e.g., reduction of a video card's operational
temperature achieved through continuous interswitching among
multiple units, where one unit is given a chance to cool down while
another one is operational, and vice versa, thus never increasing
the number of J/sec radiated by the video card beyond a certain
desired upper bound); and (f) usability considerations (e.g., a
driving monitor's preferred mode on a user's primary monitor is
more important than driving it on a secondary monitor, assuming
that all monitors cannot be driven at preferred modes, where a
decision of which monitor is primary is a function of
user-specified mode of operation). For example, given DVI LCD,
S-video HDTV, and HD-15 CRT/3D glasses, a user might prefer to
work/read/browse on DVI LCD that has the best clarity, watch movies
on S-video HDTV that has the largest active pixel region, and play
games on HD-15 CRT/3D glasses that support the highest refresh
rates and best gaming experience.
Example 39
Exemplary Solution Space
[0345] A solution space containing all possible VidPN
implementations, with all possible video present target mode sets
available on its targets and all the various ways to distribute
available video present source modes across its inputs,
availability of each of which is a function of a video mode to be
driven on a respective output (based on such factors as the
presence of hardware scaling in an underlying video codec), may be
intractable for a simple brutal force enumeration. A non-brute
force approach for a general case of T video present targets, K
codecs, and .SIGMA. video present sources may be analogous to a
classical tri-partite graph matching problem, which is known to be
NPC (e.g., there is no known algorithm that runs in polynomial time
and finds an ideal, or globally optimal, solution). Determining an
approximate solution as close as possible to an ideal solution is
desirable.
Example 40
Exemplary Complexities
[0346] Determining which configurations are functional can be a
complex task. For example, for a given configuration, the following
may need to be considered:
[0347] 1. Which video output codec can be used to drive which video
output
[0348] 2. Which video codec can be used to convert which render
target's primary surface into a video signal
[0349] 3. What are the possible video mode set distributions across
the video outputs
[0350] 4. What are the possible video modes that each video codec
can drive
[0351] 5. What are the possible graphics rendering mode
distributions across the render targets.
[0352] Some of the issues making the search complex are that codes
are a scarce resource, and there are usually less codecs than
outputs, so for clone-view it is beneficial to share a single codec
across multiple outputs, whenever possible. Such an approach has a
downside of forcing the same video mode on both monitors which may
not work, if the monitors do not have a common video mode that the
both support (e.g., a CRT can go up to 1280.times.1024 and an LCD
may support only 1600.times.1200). Even if they do share a video
mode, such might not be the ideal way to drive the monitors, since
the video mode might not be their preferred mode. For example, a
projector supports 640.times.480, 800.times.600, 1024.times.768
(native), and 1280.times.1024. The LCD supports 640.times.480,
800.times.600, 1024.times.768, 1280.times.1024, and 1400.times.1050
(native). Sharing a codec between these two means only one driver
can be driven at its preferred video mode.
[0353] Or, an LCD might support 1024.times.768, 1280.times.1024,
1600.times.1200 (preferred). And a projector might support
640.times.480, 800.times.600 (preferred), and 1024.times.768.
Sharing means that neither monitor can be driven at its preferred
mode.
[0354] In addition, not all codecs are created equal. Sometimes a
video card has different codecs, with one being able to do more
modes or perform some of them better than the other. The situation
can become even more complicated with certain modes being available
on certain codecs (e.g., one codec can do only 16-bit, and another
codec can do only 32-bit modes).
[0355] Finally, while cross-bar can be used to reroute codecs to
different outputs, its limitations and incompatibility of the codec
with the video output's technology can result in certain codecs
being restricted to certain subsets of outputs (e.g., CRTC can not
drive DVI, and TMDS can not drive HD-15 of S-video).
[0356] To avoid a brute force approach of enumerating all possible
implementations, a convergence approach can be used instead.
Example 41
Exemplary Advantages to Delegating Determination to Video
Driver
[0357] In any of the examples described herein, determining whether
a particular provisional configuration is functional for the video
adapter can be accomplished by (e.g., delegated to) the device
driver. A possible alternative is to construct a general-case
generic solution that can handle determination across a set of
video adapters (e.g., all known video adapters). However, such a
solution would require logic for handling a vast number of
scenarios.
[0358] Instead, by delegating determination to the device driver,
the device driver can be made more lightweight and need not solve
the general case. For example, the device driver need not contain
logic for handling scenarios that the corresponding video adapter
cannot implement (e.g., are not present in hardware). In this way,
the size of the device driver can be reduced and its performance
(e.g., speed) can be increased (e.g., as compared to a general
solution).
Example 42
Exemplary Comparison between Topology and Sources/Targets
[0359] A topology can be treated as a configurable resource,
wherein the options (e.g., video present paths) can be configured
concurrently. Compare to those video preset sources/targets in
which only a single option (e.g., source/target mode) can be
configured at once. Modes can be mutually exclusive within a given
mode set, whereas present paths need not be necessarily mutually
exclusive, but can be.
Example 43
Exemplary Approaches
[0360] Two possible approaches include a query-based approach and a
traversal-based approach. A query-based approach may involve
querying a display miniport for a solution that satisfies a set of
requirements provided by the OS. A traversal-based approach may
involve navigating through a solution space by incrementally
building up a functional VidPN implementation with desired video
present target and source modes chosen for its targets and sources,
respectively. Determining a near-optimal implementation of a VidPN
may be left to a video miniport.
[0361] Alternatively, an OS may supply a video miniport with: (1) a
video present target mode set requirement for each VidPN target
that has a monitor connected to it (e.g., a video card must not
expose video signal modes not supported by an attached monitor),
conformance to which on the DDI side can be validated by the OS
during video present target mode enumeration; and (2) a video
present target mode set guideline to support monitors' preferred
monitor source modes based on a supplied prioritization scheme,
where a display miniport may find a VidPN implementation where a
preferred monitor source mode is supported on a more preferable
monitor first, with the preferred monitor source mode support on
every monitor connected to the system being the ideal solution.
[0362] Finding a near-optimal distribution of graphics video
present source modes supported on VidPN sources may be left to a
graphics subsystem's client (e.g., Shell), where a driver merely
exposes an ability to traverse respective video present source mode
sets distribution solution space through an API reporting a video
card's capabilities under a specified operational state. Approaches
as simple as Greedy or as complex as graph-based searches may be
employed.
Example 44
Exemplary Computing Environment
[0363] FIG. 26 and the following discussion are intended to provide
a brief, general description of an exemplary computing environment
in which the disclosed technology may be implemented. Although not
required, the disclosed technology will be described in the general
context of computer-executable instructions, such as program
modules, being executed by a personal computer (PC). Generally,
program modules include routines, programs, objects, components,
data structures, etc. that perform particular tasks or implement
particular abstract data types. Moreover, the disclosed technology
may be implemented with other computer system configurations,
including hand-held devices, multiprocessor systems,
microprocessor-based or programmable consumer electronics, network
PCs, minicomputers, mainframe computers, and the like. The
disclosed technology may also be practiced in distributed computing
environments where tasks are performed by remote processing devices
that are linked through a communications network. In a distributed
computing environment, program modules may be located in both local
and remote memory storage devices.
[0364] With reference to FIG. 26, an exemplary system for
implementing the disclosed technology includes a general purpose
computing device in the form of a conventional PC 2600, including a
processing unit 2602, a system memory 2604, and a system bus 2606
that couples various system components including the system memory
2604 to the processing unit 2602. The system bus 2606 may be any of
several types of bus structures including a memory bus or memory
controller, a peripheral bus, and a local bus using any of a
variety of bus architectures. The system memory 2604 includes read
only memory (ROM) 2608 and random access memory (RAM) 2610. A basic
input/output system (BIOS) 2612, containing the basic routines that
help with the transfer of information between elements within the
PC 2600, is stored in ROM 2608.
[0365] The PC 2600 further includes a hard disk drive 2614 for
reading from and writing to a hard disk (not shown), a magnetic
disk drive 2616 for reading from or writing to a removable magnetic
disk 2617, and an optical disk drive 2618 for reading from or
writing to a removable optical disk 2619 (such as a CD-ROM or other
optical media). The hard disk drive 2614, magnetic disk drive 2616,
and optical disk drive 2618 are connected to the system bus 2606 by
a hard disk drive interface 2620, a magnetic disk drive interface
2622, and an optical drive interface 2624, respectively. The drives
and their associated computer-readable media provide nonvolatile
storage of computer-readable instructions, data structures, program
modules, and other data for the PC 2600. Other types of
computer-readable media which can store data that is accessible by
a PC, such as magnetic cassettes, flash memory cards, digital video
disks, CDs, DVDs, RAMs, ROMs, and the like, may also be used in the
exemplary operating environment.
[0366] A number of program modules may be stored on the hard disk,
magnetic disk 2617, optical disk 2619, ROM 2608, or RAM 2610,
including an operating system 2630, one or more application
programs 2632, other program modules 2634, and program data 2636. A
user may enter commands and information into the PC 2600 through
input devices such as a keyboard 2640 and pointing device 2642
(such as a mouse). Other input devices (not shown) may include a
digital camera, microphone, joystick, game pad, satellite dish,
scanner, or the like. These and other input devices are often
connected to the processing unit 2602 through a serial port
interface 2644 that is coupled to the system bus 2606, but may be
connected by other interfaces such as a parallel port, game port,
or universal serial bus (USB). A monitor 2646 or other type of
display device is also connected to the system bus 2606 via an
interface, such as a video adapter 2648. Other peripheral output
devices, such as speakers and printers (not shown), may be
included.
[0367] The PC 2600 may operate in a networked environment using
logical connections to one or more remote computers, such as a
remote computer 2650. The remote computer 2650 may be another PC, a
server, a router, a network PC, or a peer device or other common
network node, and typically includes many or all of the elements
described above relative to the PC 2600, although only a memory
storage device 2652 has been illustrated in FIG. 26. The logical
connections depicted in FIG. 26 include a local area network (LAN)
2654 and a wide area network (WAN) 2656. Such networking
environments are commonplace in offices, enterprise-wide computer
networks, intranets, and the Internet.
[0368] When used in a LAN networking environment, the PC 2600 is
connected to the LAN 2654 through a network interface 2658. When
used in a WAN networking environment, the PC 2600 typically
includes a modem 2660 or other means for establishing
communications over the WAN 2656, such as the Internet. The modem
2660, which may be internal or external, is connected to the system
bus 2606 via the serial port interface 2644. In a networked
environment, program modules depicted relative to the personal
computer 2600, or portions thereof, may be stored in the remote
memory storage device. The network connections shown are exemplary,
and other means of establishing a communications link between the
computers may be used.
Example 45
Exemplary Specification
[0369] The following is an exemplary specification for implementing
a video presenting network supporting the various technologies
described herein. In the example, a video presenting network is
sometimes called a "video present network" or "VidPN." A particular
configuration for the video present network is sometimes called a
"VidPN implementation."
[0370] The functions described can be combined into a programmatic
interface, such as an API or DDI. Such an interface can be
implemented by a device driver for access by a client such as an
operating system.
TABLE-US-00003 TABLE 3 Function EnumAvailVidPNTargets Name
EnumAvailVidPNTargets Purpose Enumerates available VidPN targets,
supported by the video card, given the specified VidPN
implementation, each of which could be added to its topology using
AddVideoPresentPathToVidPNTopology, where each target represents a
unique video output on the video card. Prototype NTSTATUS
EnumAvailVidPNTargets ( [in] VIDPN_IMPL hVidPNImpl, [out] PDWORD
pdwNumOfAvailVidPTs, [out] PVIDEO_PRESENT_TARGET* ppAvailVidPTs );
Inputs Name Description -- -- Outputs Name Description hVidPNImpl
VidPN implementation in whose context the caller is interested in
finding the available VidPN targets supported by the video card.
Note that these aren't just the targets that are part of the
specified VidPN implementation. If hVidPNImpl = NULL, the video
present targets that video card can support through at least one
VidPN shall be returned. pdwNumOfAvailVidPTs Number of available
video present targets (VidPTs). ppAvailVidPTs Placeholder for the
address of the array containing available video present target
descriptors to be initialized by the display miniport. Status Name
Description STATUS_SUCCESS Query has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Invalid VidPN implementation handle
has been provided. STATUS_NO_MEMORY Display miniport failed to
allocate enough system memory for the requested array of video
present targets. Side-effects None. Allocation Display miniport is
responsible for allocating a buffer of size: ownership
pdwNumOfAvailVidPTs * sizeof (VIDPT) semantics for the video
present targets array in system memory using DlpAllocatePool.
Display loader is responsible for de-allocating this buffer once
it's done with it. Remarks Video present targets are ordered by
their IDs, smallest first, from 0 to pdwNumOfAvailVidPTs - 1. Note
that any number of the enumerated video present targets can be
mutually exclusive, meaning they are not necessarily all available
for concurrent use through a single VidPN, and using one of them
for the topology of any given VidPN may make one or more of the
other enumerated video present targets inaccessible.
TABLE-US-00004 TABLE 4 Function ConstrainModesOnVidPNTargets Name
ConstrainModesOnVidPNTargets Purpose Sets the video mode
constraints on each of the enumerated video present targets.
Prototype NTSTATUS ConstrainModesOnVidPNTargets ( [in]
PVIDEO_MODE_SET pvmsMonitor ); Inputs Name Description pvmsMonitor
Array of video mode sets supported by the monitors connected to the
respective VidPT's video present targets, and, hence, allowed on
these outputs. Entry containing NULL means no constraints are
imposed on the respective video output's modes (i.e. no monitor is
present on that output). OS shall treat NULL-constrained outputs as
disabled, and display miniport should consider powering down the
DAC driving that video output to conserve video card's power
consumption. Outputs Name Description -- -- Status Name Description
STATUS_SUCCESS Constraint has been set successfully. Side-effects
None. Allocation Display miniport must make a private copy of the
supplied per-target video mode constraints, since once ownership
the request is successfully completed, arguments' memory can be
deallocated by the OS. semantics Remarks This DDI lets OS specify
the video mode sets that are allowed on each of the video present
targets, ordered in the same sequence as enumerated by
EnumAvailVidPNTargets. OS needs to use this DDI on monitor HPD
events to notify display miniport about the change in video mode
constraints on the video card's video present targets. Note that if
no monitor descriptor is present, OS shall use a hard coded list of
video modes expected to be supported on the video output of a given
type (e.g. IBM_*, APPLE_*, VESA_*, VDMT_*, AND EIA_* modes for DVI,
HD-15, BNC, etc.; NTSC_*, PAL_*, AND SECAM_* modes for S-video,
RCA, RF, etc.). 3.sup.rd party hard-coded list manipulation (e.g.
addition/removal of video modes to/from such lists) shall be
supported in the OS to satisfy extensibility and flexibility
requirements.
TABLE-US-00005 TABLE 5 Function EnumAvailVidPNSources Name
EnumAvailVidPNSources Purpose Enumerates available VidPN sources
supported by the video card, given the specified VidPN
implementation, each of which could be added to its topology using
AddVideoPresentPathToVidPNTopology, where each source represents a
video output codec's input on the video card. Prototype NTSTATUS
EnumAvailVidPNSources ( [in] VIDPN_IMPL hVidPNImpl, [out] PDWORD
pdwNumOfAvailVidPSs, [out] PVIDEO_PRESENT_SOURCE* ppAvailVidPSs );
Inputs Name Description hVidPNImpl VidPN implementation in whose
context the caller is interested in finding the available VidPN
sources supported by the video card. Note that these aren't just
the sources that are part of the specified VidPN implementation. If
hVidPNImpl = NULL, the maximum number of video present sources (and
hence views) video card can support under at least one VidPN shall
be returned. Outputs Name Description pdwNumOfAvailVidPSs Number of
available present sources that can be added to the topology of the
specified VidPN. ppAvailVidPSs Placeholder for the address of the
array containing available video present source descriptors to be
initialized by the display miniport. Status Name Description
STATUS_SUCCESS Query has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Invalid VidPN implementation handle
has been provided. STATUS_NO_MEMORY Display miniport failed to
allocate enough system memory for the requested array of video
present sources. Side-effects None. Allocation Display miniport is
responsible for allocating a buffer of size: ownership
pdwNumOfAvailVidPSs * sizeof(VIDPS) semantics for the video present
targets array in system memory using DlpAllocatePool. Display
loader is responsible for de-allocating this buffer once it's done
with it. Remarks Video present sources are identified from 0 to
dwNumOfOutputs - 1, ordered smallest first. Note that this DDI does
not return all the sources, just those that can be added to the
specified VidPN. Maximum number of supported video present sources
is a function of the VidPN's implementation. Specifically, per each
sharing of video output codec among two or more video present
targets (for clone- view), an additional video present source can
be supported by the video card. If each output in clone- view
association is driven by a separate video codec, then the number of
maximum number of video present sources decreases as the number of
available codecs decreases. Therefore, essentially, this DDI
returns the number of video output codecs unused by the
implementation of the specified VidPN and usable in combination
with the video output codecs employed by that VidPN. To find the
maximum number of additional video present sources current VidPN
can be extended to, pass the VidPN implementation handle returned
by GetActiveVidPNImpl.
TABLE-US-00006 TABLE 6 Function CreateVidPNImpl Name
CreateVidPNImpl Purpose Creates a VidPN implementation. Prototype
NTSTATUS CreateVidPNImpl ( [in] PVIDPN_TOPOLOGY pVidPNTopology,
[in] PDWORD pdwPreferredMonitors, [out] PVIDPN_IMPL phVidPNImpl );
Inputs Name Description pVidPNTopology Topology of the VidPN to be
created. pdwPreferredMonitors Prioritization of monitors, from the
most preferred to the least preferred. While choosing among VidPN
implementations satisfying the specified topology, display miniport
must try to support preferred video mode on the most preferred
monitor first, the ideal situation being that monitors (e.g., all)
can be driven in their preferred modes. Outputs Name Description
phVidPNImpl Placeholder for the handle to the implementation of the
specified VidPN. Status Name Description STATUS_SUCCESS Request has
been completed successfully.
STATUS_VIDEO_VIDPN_TOPOLOGY_NOT_SUPPORTED Specified VidPN topology
is not supported by the video card.
STATUS_VIDEO_INVALID_VIDPN_TOPOLOGY Specified VidPN is invalid
(e.g. output can not point to two video present sources
simultaneously). Side-effects None. Allocation Display miniport
must make a private copy of the supplied monitors' prioritization
scheme, since once ownership the request is successfully completed,
arguments' memory can be deallocated by the OS. semantics Remarks
This DDI creates a temporary object maintained by the display
miniport that represents a VidPN. The following operations can
subsequently be executed on such a VidPN object: 1.
AddVideoPresentPathToVidPNTopology add a video present (target,
source) association to it. 2. RemovePresentTargetFromVidPNTopology
remove an video present target from it. 3.
RemovePresentSourceFromVidPNTopology remove a video present source
from it. 4. DisposeOfVidPNImpl dispose of it. 5. CommitVidPNImpl
set video card's active VidPN to it. See descriptions of the
respective DDIs for more detail.
TABLE-US-00007 TABLE 7 Function GetActiveVidPNImpl Name
GetActiveVidPNImpl Purpose Returns a handle to the VidPN
implementation which is based on the VidPN currently set on the
video card. Prototype NTSTATUS GetActiveVidPNImpl ( [out]
PVIDPN_IMPL phActiveVidPNImpl ); Inputs Name Description -- --
Outputs Name Description phActiveVidPNImpl Handle to the
implementation of the active VidPN. Status Name Description
STATUS_SUCCESS Query has been completed successfully. Side-effects
None. Remarks This DDI is useful when it is desired to add or
remove a VidPN association to the existing VidPN, rather than
creating a completely new configuration. This DDI is essentially a
combination of GetActiveVidPNTopology and CreateVidPNImpl. It is
also useful to determine the additional maximum number of video
present sources (and hence views) that video card can support given
the current VidPN (see EnumAvailVidPNSources for more detail).
TABLE-US-00008 TABLE 8 Function GetActiveVidPNTopology Name
GetActiveVidPNTopology Purpose Returns topology of the active
VidPN. Prototype NTSTATUS GetActiveVidPNTopology ( [out]
PVIDPN_TOPOLOGY* ppActiveVidPNTopology ); Inputs Name Description
-- -- Outputs Name Description ppActiveVidPNTopology Placeholder
for the topology descriptor of the active VidPN. Status Name
Description STATUS_SUCCESS Query has been completed successfully.
STATUS_NO_MEMORY Display miniport failed to allocate enough system
memory for the requested VidPN. Side-effects None. Allocation
Display miniport is responsible for allocating a big enough buffer
for the VidPN in system memory using ownership DlpAllocatePool.
Display loader is responsible for de-allocating this buffer once
it's done with it. semantics Remarks This DDI is useful to
determine the active VidPN. In particular, it's required to obtain
the initial VidPN topology video card is booted in, by the
BIOS.
TABLE-US-00009 TABLE 9 Function DisposeOfVidPNImpl Name
DisposeOfVidPNImpl Purpose Disposes of the specified VidPN
implementation. Prototype NTSTATUS DisposeOfVidPNImpl ( [in]
VIDPN_IMPL hVidPNImpl ); Inputs Name Description hVidPNImpl VidPN
implementation to be disposed off. Outputs Name Description -- --
Status Name Description STATUS_SUCCESS Request has been completed
successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN
implementation is invalid. Side-effects On successful completion,
the specified VidPN implementation is rendered invalid. Remarks OS
should use this DDI when it no longer needs the VidPN
implementation it created using CreateVidPNImpl or
GetActiveVidPNImpl.
TABLE-US-00010 TABLE 10 Function CommitVidPNImpl Name
CommitVidPNImpl Purpose Sets the active VidPN to the specified
VidPN implementation. Prototype NTSTATUS CommitVidPNImpl ( [in]
VIDPN_IMPL hVidPNImpl ); Inputs Name Description hVidPNImpl VidPN
implementation to be set as active. Outputs Name Description -- --
Status Name Description STATUS_SUCCESS Request has been completed
successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN
implementation is invalid.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode has not
been pinned on one or more video present targets. Only a functional
VidPN implementation can be committed.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE Video present source
mode has not been pinned on one or more video present sources. Only
a functional VidPN implementation can be committed. Side-effects On
successful completion, the active VidPN on the video card is
changed to the specified VidPN implementation. Appropriate video
modes and graphics modes are then set on the video present targets
and video present sources, according to how they were set on the
VidPN implementation using PinModeOnVidPNSource(s) and
PinVideoModes. Remarks OS uses this DDI to change the current VidPN
to a functional VidPN implementation it converged on.
TABLE-US-00011 TABLE 11 Function AddVideoPresentPathToVidPNTopology
Name AddVideoPresentPathToVidPNTopology Purpose Adds a video
present target-to-source association to the specified VidPN
implementation. Prototype NTSTATUS
AddVideoPresentPathToVidPNTopology ( [in] VIDPN_IMPL hVidPNImpl,
[in] PVIDEO_PRESENT_PATH pVidPresentPathToAdd, [in] PDWORD
pdwPreferredMonitors ); Intputs Name Description hVidPNImpl VidPN
implementation to add video- output-to-render-target association
to. pVidPresentPathToAdd Video present path (i.e. target to source
association) to be added. pdwPreferredMonitors Prioritization of
monitors, from the most preferred to the least preferred. While
choosing among the various VidPN implementations satisfying the
specified topology, display miniport must try to support the
preferred video mode on the most preferred monitor first, the ideal
situation being that monitors (e.g., all) can be driven in their
preferred modes. Outputs Name Description -- -- Status Name
Description STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDPN_TARGET Specified video present
target is invalid. STATUS_VIDEO_INVALID_VIDPN_SOURCE Specified
video present source is invalid.
STATUS_VIDEO_VIDPN_TOPOLOGY_NOT_SUPPORTED Requested VidPN is not
supported by the video card. Side-effects On successful completion,
the specified VidPN association is added to the specified VidPN
implementation. Otherwise, no changes are made. Remarks OS uses
this DDI to incrementally grow a VidPN topology, one present path
at a time.
TABLE-US-00012 TABLE 12 Function
RemovePresentTargetFromVidPNTopology Name
RemovePresentTargetFromVidPNTopology Purpose Removes the specified
video present target from the topology of the specified VidPN
implementation. Prototype NTSTATUS
RemovePresentTargetFromVidPNTopology ( [in] VIDPN_IMPL hVidPNImpl,
[in] VIDPT_ID idTargetToRemove ); Inputs Name Description
hVidPNImpl VidPN implementation to remove video present target
from. idTargetToRemove Video present target to remove. Outputs Name
Description -- -- Status Name Description STATUS_SUCCESS Request
has been completed successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL
Specified VidPN implementation is invalid.
STATUS_VIDEO_INVALID_VIDPN_TARGET Specified video present target is
invalid. Side-effects On successful completion, the VidPN
association corresponding to the specified video present target is
removed from the topology of the specified VidPN implementation.
Otherwise, no changes are made. If video present source is removed
as part of the output removal, the sets of available graphics video
present source modes on the other video present sources in the
resulting VidPN may grow to include new modes. Remarks OS uses this
DDI to remove a video present target from a VidPN
implementation.
TABLE-US-00013 TABLE 13 Function
RemovePresentSourceFromVidPNTopology Name
RemovePresentSourceFromVidPNTopology Purpose Removes the specified
video present source from the topology of the specified VidPN
implementation. Prototype NTSTATUS
RemovePresentSourceFromVidPNTopology ( [in] VIDPN_IMPL hVidPNImpl,
[in] VIDPS_ID idSourceToRemove ); Inputs Name Description
hVidPNImpl VidPN implementation to remove video present source
from. idSourceToRemove Video present source to remove. Outputs Name
Description -- -- Status Name Description STATUS_SUCCESS Request
has been completed successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL
Specified VidPN implementation is invalid.
STATUS_VIDEO_INVALID_VIDPN_SOURCE Specified video present source is
invalid. Side-effects On successful completion, the VidPN
associations corresponding to the specified video present source
are removed from the topology of the specified VidPN
implementation. Otherwise, no changes are made. If successful, the
sets of available graphics video present source modes on other
video present sources in the resulting VidPN may grow to include
new modes. Remarks OS should use this DDI to remove a video present
source from a topology of the VidPN implementation.
TABLE-US-00014 TABLE 14 Function
EnumCurrentlyAvailVidPNTargetModeSets Name
EnumCurrentlyAvailVidPNTargetModeSets Purpose Enumerates sets of
available video present target modes on each of the video present
targets in the specified VidPN implementation, supported by the
respective monitors connected to these outputs. Prototype NTSTATUS
EnumCurrentlyAvailVidPNTargetModeSets ( [in] VIDPN_IMPL hVidPNImpl,
[out] PVIDEO_MODE_SET* ppvmsAvailable ); Inputs Name Description
hVidPNImpl VidPN implementation on whose video present targets sets
of available video modes must be enumerated. Outputs Name
Description ppvmsAvailable Placedholder for the array of video mode
sets supported on the video present targets in the specified VidPN
implementation. Video mode sets are ordered by their outputs IDs
(smallest first). If no video modes are supported on a given video
output (e.g. output has been disabled), display miniport should
return NULL for its video mode set. Status Name Description
STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_NO_MEMORY Display miniport failed to allocate
enough system memory for the requested VidPN. Allocation Display
miniport is responsible for allocating a big enough buffer for the
array of sets of ownership available video modes in the system
memory using DlpAllocatePool. Display loader is responsible
semantics for de-allocating this buffer once it's done with it.
Side-effects None. Remarks Note that video card might not support
all the video modes supported by the monitor. Hence OS must
enumerate video modes despite the fact that it is aware of what
video modes each monitor supports. OS shall validate that
enumerated video mode sets are subsets of the video mode sets
supported by the respective monitors. Note that setting one of the
enumerated video modes on one of the video present targets may
invalidate enumerated video mode on another video output. This is
the primary reason for enumerating available (e.g., all) video mode
sets on all video present targets in a single call, so that the
client could choose from the options potentially available to
it.
TABLE-US-00015 TABLE 15 Function PinModeOnVidPNTarget Name
PinModeOnVidPNTarget Purpose Pins the specified video present
target mode on the specified VidPN target, guaranteeing that
display miniport shall not enumerate (and allow to be pinned) video
present target modes on other VidPN targets that would invalidate
this mode. Prototype NTSTATUS PinModeOnVidPNTarget ( [in]
VIDPN_IMPL hVidPNImpl, [in] VIDEO_PRESENT_TARGET
pTargetToPinModeOn, [in] DWORD dwVideoPresentTargetModeToPin, [out]
PBOOLEAN pbOtherVideoPresentTargetModesInvalidated ); Inputs Name
Description hVidPNImpl VidPN implementation on whose video present
target the specified video present target modes is to be pinned.
pTargetToPinModeOn Video present target on which the specified
video present target mode is to be pinned.
dwVideoPresentTargetModeToPin Index of the video present target
mode from the set of available modes on the specified video present
target, enumerated through EnumCurrentlyAvailVidPNTargetModeSets,
to pin. pbOtherVideoPresentTargetModesInvalidated Placeholder for
the predicate, which if true signifies that at least one video
present target mode on some other video present target has been
invalidated and the OS needs to re-query the available video
present target modes using EnumCurrentlyAvailVidPNTargetModeSets.
Outputs Name Description -- -- Status Name Description
STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDPN_TARGET Specified video present
target is invalid. STATUS_VIDEO_INVALID_VIDEO_PRESENT_TARGET_MODE
The specified video present target mode was not enumerated as
available. STATUS_VIDEO_PRESENT_TARGET_MODE_ALREADY_PINNED Video
present target mode has already been pinned on the specified video
present target. Caller must first unpin the video present target
mode in question using UnpinModeOnVidPNTarget.
STATUS_VIDEO_ENUMERATED_VIDPN_TARGET_MODESET_CHANGED Previously
enumerated set of available video present target modes on the
specified video present target has changed. OS must reenumerate the
set by using EnumCurrentlyAvailVidPNTargetModeSets.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE Video mode was not
pinned on one or more of the video present sources. Semi-
functional VidPN implementation must be provided. Side-effects
None. Remarks OS uses this DDI to pin a video present target mode
for each of the video present targets in the VidPN implementation,
prior to activating that implementation using CommitVidPNImpl. Note
that video present targets must have a video mode selected on them.
Video present target modes on the video present target other than
the pinned mode are subject to invalidation when a video present
target mode on another video present target is set. Display
miniport shall guarantee that no video present target mode that
would invalidate any of the pinned video present target modes is
enumerated and/or pinnable (from previous enumerations) on any of
the video present targets in the specified VidPN
implementation.
TABLE-US-00016 TABLE 16 Function UnpinModeOnVidPNTarget Name
UnpinModeOnVidPNTarget Purpose Unpins the currently selected video
present target mode on the specified video present target of the
specified VidPN implementation, freeing display miniport up from
the obligation to disallow video present target modes on other
video present ources that would invalidate the previously selected
video present target mode on the specified video present target.
Prototype NTSTATUS UnpinModeOnVidPNTarget ( [in] VIDPN_IMPL
hVidPNImpl, [in] PVIDEO_PRESENT_TARGET pTargetToUnpinModeOn, [out]
PBOOLEAN pbNewVideoPresentTargetModesAvailable ); Inputs Name
Description hVidPNImpl VidPN implementation on whose video present
target the specified video present target mode is to be unpinned.
pTargetToUnpinModeOn VidPN target on which the specified video
present target mode is to be unpinned.
pbNewVideoPresentTargetModesAvailable Placeholder for the
predicate, which if true signifies that at least one new video
present target mode has become available on some other video
present target and the OS needs to re-query the available video
present target modes using EnumCurrentlyAvailVidPNTargetModeSets.
Outputs Name Description -- -- Status Name Description
STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDPN_TARGET Specified video present
target is invalid. STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET
Specified video present target doesn't have a selected mode.
Side-effects None. Remarks OS uses this DDI when it is no longer
interested in support for the specified video present target mode
on the specified video present target. This could, for instance, be
the case if a pinned video present target mode invalidates a
desired video present target mode on another video present
target.
TABLE-US-00017 TABLE 17 Function PinModeOnEachVidPNTarget Name
PinModeOnEachVidPNTarget Purpose Pins a video mode for each video
present target in the specified VidPN implementation. Prototype
NTSTATUS PinModeOnEachVidPNTarget ( [in] VIDPN_IMPL hVidPNImpl,
[in] PDWORD pdwVideoModesToPin ); Inputs Name Description
hVidPNImpl VidPN implementation on whose video present targets
specified video modes will be pinned. pdwVideoModesToPin Array of
video mode indices into the respective video mode sets enumerated
using EnumCurrentlyAvailVidPNTargetModeSets. Video modes are
ordered by their video output IDs (smallest first). Outputs Name
Description -- -- Status Name Description STATUS_SUCCESS Request
has been completed successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL
Specified VidPN implementation is invalid.
STATUS_VIDEO_INVALID_VIDEO_PRESENT_TARGET.sub.-- One or more of the
specified video mode IDs MODE were invalid.
STATUS_VIDEO_ENUMERATED_VIDPN_TARGET.sub.-- Previously enumerated
set of available video MODESET_CHANGED modes on the specified video
output has changed. OS must reenumerate the set by using
EnumCurrentlyAvailVidPNTargetModeSets. Side-effects None. Remarks
This DDIs pins a video mode for each video output in the VidPN from
the sets of video modes available on respective outputs, enumerated
using EnumCurrentlyAvailVidPNTargetModeSets. Note that pinning a
video mode on one video output does not invalidate any previously
enumerated video modes on the other video present targets, since
available video mode sets depend only on the video output codec
driving it, and hence only on the specified VidPN implementation.
The only way a given video mode may become invalidated is if the
video card's operational capabilities have changed due to a change
in in its power management state.
TABLE-US-00018 TABLE 18 Function
EnumCurrentlyAvailVidPNSourceModeSets Name
EnumCurrentlyAvailVidPNSourceModeSets Purpose Enumerates sets of
available video present source modes on each of the video present
sources in the specified VidPN implementation. Prototype NTSTATUS
EnumCurrentlyAvailVidPNSourceModeSets ( [in] VIDPN_IMPL hVidPNImpl,
[out] PVIDEO_PRESENT_SOURCE_MODE_SET* pprmsAvailable ); Inputs Name
Description hVidPNImpl VidPN implementation on whose views sets of
available video present source modes must be enumerated. Outputs
Name Description pprmsAvailable Array of video present source mode
sets available on the video present sources in the specified VidPN
implementation. Video present source mode sets are ordered by their
video present sources' IDs (smallest first). Status Name
Description STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_NO_MEMORY Display miniport failed to allocate
enough system memory for the requested VidPN.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode has not
been pinned on one or more video present targets. Semi-functional
VidPN implementation must be provided. Side-effects None.
Allocation Display miniport is responsible for allocating a big
enough buffer for the array of sets of available ownership graphics
modes in the system memory using DlpAllocatePool. Display loader is
responsible for de- semantics allocating this buffer once it's done
with it. Remarks Before calling this DDI, OS must select a video
present target mode for each of the VidPN targets. Note that the
spatial resolution of the video mode set does not necessarily
correspond to that of the (graphics) video present source mode,
since video card can do h/w scaling (in its video output codec).
Display miniport must not report (graphics) video present source
modes which require GPU based scaling. This functionality shall be
done in the graphics subsystem layer of the OS. Display miniport
must not report (graphics) video present source modes selecting
which would prevent another video present source from supporting at
least one video present source mode.
TABLE-US-00019 TABLE 19 Function PinModeOnVidPNSource Name
PinModeOnVidPNSource Purpose Pins the specified video present
source mode on the specified video present source of the specified
VidPN implementation, guaranteeing that display miniport shall not
enumerate (and allow to be pinned) video present source modes on
other video present sources that would invalidate this mode.
Prototype NTSTATUS PinModeOnVidPNSource ( [in] VIDPN_IMPL
hVidPNImpl, [in] PVIDEO_PRESENT_SOURCE pSourceToPinModeOn, [in]
DWORD dwVideoPresentSourceModeToPin, [out] PBOOLEAN
pbOtherVideoPresentSourceModesInvalidated ); Inputs Name
Description hVidPNImpl VidPN implementation on whose video present
target the specified video present source modes is to be pinned.
pSourceToPinModeOn Video present source on which the specified
video present source mode is to be pinned.
dwVideoPresentSourceModeToPin Index of the video present source
mode from the set of available modes on the specified VidPN source,
enumerated through EnumCurrentlyAvailVidPNSourceModeSets, to pin.
pbOtherVideoPresentSourceModesInvalidated Placeholder for the
predicate, which if true signifies that at least one video present
source mode on some other VidPN source has been invalidated and the
OS needs to re-query the available video present source modes using
EnumCurrentlyAvailVidPNSourceModeSets. Outputs Name Description --
-- Status Name Description STATUS_SUCCESS Request has been
completed successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL Specified
VidPN implementation is invalid. STATUS_VIDEO_INVALID_VIDPN_SOURCE
Specified VidPN source is invalid.
STATUS_VIDEO_INVALID_VIDEO_PRESENT_SOURCE_MODE The specified video
present source mode was not enumerated as available.
STATUS_VIDEO_MODE_ALREADY_PINNED_ON_VIDPN_SOURCE Video present
source mode has already been pinned on the specified VidPN source.
Caller must first unpin the video present source mode in question
using UnpinModeOnVidPNSource.
STATUS_VIDEO_ENUMERATED_VIDPN_TARGET_MODESET_CHANGED Previously
enumerated set of available video present source modes on the
specified VidPN source has changed. OS must reenumerate the set by
using EnumCurrentlyAvailVidPNSourceModeSets. Side-effects None.
Remarks OS uses this DDI to pin a video present source mode for
each of the video present sources in the VidPN implementation,
prior to activating that implementation using CommitVidPNImpl. Note
that video present targets must have a video mode selected on them.
Video present source modes on the video present source other than
the pinned mode are subject to invalidation when a video present
source mode on another video present source is set. Display
miniport shall guarantee that no video present source mode that
would invalidate any of the pinned video present source modes is
enumerated and/or pinnable (from previous enumerations) on any of
the video present sources in the specified VidPN
implementation.
TABLE-US-00020 TABLE 20 Function UnpinModeOnVidPNSource Name
UnpinModeOnVidPNSource Purpose Unpins the currently selected video
present source mode on the specified video present source of the
specified VidPN implementation, freeing display miniport up from
the obligation to disallow video present source modes on other
video present ources that would invalidate the previously selected
video present source mode on the specified video present source.
Prototype NTSTATUS UnpinModeOnVidPNSource ( [in] VIDPN_IMPL
hVidPNImpl, [in] PVIDEO_PRESENT_SOURCE pSourceToUnpinModeOn, [out]
PBOOLEAN pbNewVideoPresentSourceModesAvailable ); Inputs Name
Description hVidPNImpl VidPN implementation on whose video present
targets the specified video present source modes is to be unpinned.
pSourceToUnpinModeOn Video present source on which the specified
video present source mode is to be unpinned.
pbNewVideoPresentSourceModesAvailable Placeholder for the
predicate, which if true signifies that at least one new video
present source mode has become available on some other video
present source and the OS needs to re-query the available video
present source modes using EnumCurrentlyAvail VidPNSourceModeSets.
Outputs Name Description -- -- Status Name Description
STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDPN_SOURCE Specified video present
source is invalid. STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE
Specified video present source doesn't have a selected mode.
Side-effects None. Remarks OS uses this DDI when it is no longer
interested in support for the specified video present source mode
on the specified video present source. This could, for instance, be
the case if a pinned video present source mode invalidates a
desired video present source mode on another video present
source.
TABLE-US-00021 TABLE 21 Function PinModeOnEachVidPNSource Name
PinModeOnEachVidPNSource Purpose Pins a video present source mode
for each of the video present sources in the VidPN implementation,
in a single call. Prototype NTSTATUS PinModeOnEachVidPNSource (
[in] VIDPN_IMPL hVidPNImpl, [in] PDWORD pdwRenderingModeIDsToPin );
Inputs Name Description hVidPNImpl VidPN implementation on whose
video present source specified video present source modes will be
pinned. pdwRenderingModeIDsToPin Array of video present source mode
IDs of video present source modes to be pinned, where each mode is
from the mode set of the respective video present sources',,
enumerated via EnumCurrentlyAvailVid PNSourceModeSets. Video
present source modes are ordered by their video present sources'
IDs (smallest first). Outputs Name Description -- -- Status Name
Description STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDEO_PRESENT_SOURCE_MODE_ID One or
more of the specified video present source mode IDs were invalid.
STATUS_VIDEO_ENUMERATED_VIDPN_TARGET_MODESET_CHANGED Previously
enumerated set of available video present source modes on the
specified video present source has changed. OS must reenumerate the
set by using EnumCurrentlyAvailVid PNSourceModeSets.
STATUS_VIDEO_PRESENT_SOURCE_MODES_ARE_MUTUALLY_EXCLUSIVE At least
one of the specified video present source modes on one of the video
present sources invalidates another specified video present source
mode on another video present source in the specified VidPN.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode was not
pinned on one or more of the video present targets. Semi-
functional VidPN implementation must be provided. Side-effects
None. Remarks This DDIs pins a video present source mode for each
video present source in the VidPN from the set of video present
source modes available on the respective video present sources,
enumerated using EnumCurrentlyAvailVidPNSourceModeSets. This DDI
should be used when the specified rendering multi-mode for a given
VidPN is known to work, such as the case when OS logs a known user
in, or, on a previously encountered monitor HPD-event- induced
VidPN, where a previously used configuration has been persisted and
can still be reused. Note that if any of the video present sources
had a video present source mode pinned on them using PinRenderMode,
that mode shall be ignored and assuming the specified video present
source modes can be set, the call shall succeed. This is different
from the calling semantics of PinRenderMode which will fail if a
video present source mode is already selected on the specified
video present source.
TABLE-US-00022 TABLE 22 Function
EnumCurrentlyAvailFilteringTechniqueSets Name
EnumCurrentlyAvailFilteringTechniqueSets Purpose Enumerates sets of
available filtering techniques on each of the video present sources
in the specified functional VidPN implementation. Prototype
NTSTATUS EnumCurrentlyAvailFilteringTechniqueSets ( [in] VIDPN_IMPL
hVidPNImpl, [out] PFILTERING_TECHNIQUES_SET* ppftsAvailable );
Inputs Name Description hVidPNImpl VidPN implementation on whose
views the sets of available filtering techniques must be
enumerated. Outputs Name Description ppftsAvailable Array of
filtering techniques sets available on the video present sources in
the specified VidPN implementation. Video present source mode sets
are ordered by their video present sources' IDs (smallest first).
Status Name Description STATUS_SUCCESS Request has been completed
successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN
implementation is invalid. STATUS_NO_MEMORY Display miniport failed
to allocate enough system memory for the requested VidPN.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode was not
pinned on one or more video present target. A functional VidPN
implementation must be provided.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE Video present source
mode was not pinned on one or more video present source. A
functional VidPN implementation must be provided. Side-effects
None. Allocation Display miniport is responsible for allocating a
big enough buffer for the array of sets of available ownership
graphics modes in the system memory using DlpAllocatePool. Display
loader is responsible for de- semantics allocating this buffer once
it's done with it. Remarks Before calling this DDI, OS must pin a
video mode for each of the video present targets and pin a video
present source mode for each of the video present sources in the
specified VidPN implementation (i.e. it needs to construct a
functional VidPN).
TABLE-US-00023 TABLE 23 Function PinFilteringTechniqueOnVidPNSource
Name PinFilteringTechniqueOnVidPNSource Purpose Pins the specified
filtering technique on the specified video present source of the
specified VidPN implementation, guaranteeing that display miniport
shall not enumerate (and allow to be set) filtering techniques on
other video present sources that would invalidate this filtering
technique. Prototype NTSTATUS PinFilteringTechnique ( [in]
VIDPN_IMPL hVidPNImpl, [in] VIDPS_ID idSourceToPinModeOn, [in]
DWORD dwFilteringTechniqueToSelect, [out] PBOOLEAN
pbOtherFilteringTechniquesInvalidated ); Inputs Name Description
hVidPNImpl VidPN implementation on whose video present targets the
specified video present source modes is to be pinned.
idRenderTargetToSelectModeOn Video present source on which the
specified filtering technique is to be pinned.
dwFilteringTechniqueToSelect Index of the filtering technique from
the set of available filtering techniques on the specified video
present source, enumerated through EnumCurrentlyAvailFiltering
TechniqueSets, to pin. pbOtherFilteringTechniquesInvalidated
Placeholder for the predicate, which if true signifies that at
least one filtering technique on some other video present source
has been invalidated and the OS needs to re-query the available
filtering techniques using EnumCurrentlyAvailFiltering
TechniqueSets. Outputs Name Description -- -- Status Name
Description STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_VIDPN_SOURCE Specified video present
source is invalid. STATUS_VIDEO_INVALID_FLTRTECHNIQUE The specified
filtering technique has not been enumerated as available.
STATUS_VIDEO_FLTRTECHNIQUE_ALREADY_PINNED Filtering technique has
already been pinned on the specified video present source. Caller
must first unpin the filtering technique in question using
UnpinFilteringTechnique.
STATUS_VIDEO_ENUMERATED_TECHNIQUE_SET_CHANGED Previously enumerated
set of available filtering techniques on the specified video
present source has changed. OS must reenumerate the set by using
EnumCurrentlyAvailFiltering TechniqueSets.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode has not
been pinned on one or more video present targets. A functional
VidPN implementation must be provided.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE Video present source
mode was not selected on one or more video present sources. A
functional VidPN implementation must be provided. Side-effects
None. Remarks OS uses this DDI to select a filtering technique for
each of the video present sources in the VidPN implementation,
prior to setting that implementation as the current configuration,
using CommitVidPNImpl. Note that this step is optional, and if not
explicitly specified, driver should use the default filtering
technique - i.e. no filtering. Note that video present targets must
have a video mode pinned on them and video present sources must
have a video present source mode pinned on them - i.e. the VidPN
must be functional. Filtering techniques on the video present
source other than the pinned technique are subject to invalidation
when a filtering technique on another video present source is set.
Display miniport shall guarantee that no filtering technique that
would invalidate any of the pinned techniques is enumerated and/or
pinnable (from previous enumerations) on any of the video present
sources in the specified VidPN implementation.
TABLE-US-00024 TABLE 24 Function
UnpinFilteringTechniqueOnVidPNSource Name
UnpinFilteringTechniqueOnVidPNSource Purpose Unpins the currently
pinned filtering technique on the specified video present source of
the specified VidPN implementation, freeing display miniport up
from the obligation to disallow filtering techniques on other video
present source that would invalidate the previously selected
filtering technique on the specified video present source.
Prototype NTSTATUS UnpinFilteringTechnique ( [in] VIDPN_IMPL
hVidPNImpl, [in] VIDPS_ID idSorceToUnpinTechniqueOn, [out] PBOOLEAN
pbNewFilteringTechniquesAvailable ); Inputs Name Description
hVidPNImpl VidPN implementation on whose video present targets the
specified video present source modes is to be pinned.
idSorceToUnpinTechniqueOn Video present source on which the
specified video present source mode is to be pinned.
bNewFilteringTechniquesAvailable Placeholder for the predicate,
which if true signifies that at least one new filtering technique
has become available on some other video present source and the OS
needs to re-query the available filtering techniques using
EnumCurrentlyAvail FilteringTechnique Sets. Outputs Name
Description -- -- Status Name Description STATUS_SUCCESS Request
has been completed successfully. STATUS_VIDEO_INVALID_VIDPN_IMPL
Specified VidPN implementation is invalid.
STATUS_VIDEO_INVALID_VIDPN_SOURCE Specified video present source is
invalid. STATUS_VIDEO_FLTRTECHNIQUE_NOT_PINNED_ON_VIDPN_SOURCE
Specified video present source doesn't have a pinned filtering
technique. Side-effects None. Remarks OS uses this DDI when it is
no longer interested in support for the specified filtering
technique on the specified video present source. This could, for
instance, be the case if a selected filtering technique invalidates
a desired filtering technique on another video present source. When
no filtering technique is selected on the video present source the
default filtering technique is "no filtering", represented through
a zero filtering technique ID.
TABLE-US-00025 TABLE 25 Function
PinFilteringTechniqueOnEachVidPNSource Name
PinFilteringTechniqueOnEachVidPNSource Purpose Pins a filtering
technique for each of the video present sources in the VidPN
implementation, in a single call. Prototype NTSTATUS
PinFilteringTechniques ( [in] VIDPN_IMPL hVidPNImpl, [in] PDWORD
pdwFilteringTechniqueIDsToPin ); Inputs Name Description hVidPNImpl
VidPN implementation on whose video present source specified
filtering techniques will be pinned. pdwFilteringTechniqueIDsToPin
Array of filtering technique IDs from the filtering technique sets
of respective video present sources. Filtering techniques are
ordered by their video present sources' IDs (smallest first).
Outputs Name Description -- -- Status Name Description
STATUS_SUCCESS Request has been completed successfully.
STATUS_VIDEO_INVALID_VIDPN_IMPL Specified VidPN implementation is
invalid. STATUS_VIDEO_INVALID_FLTRTECHNIQUE_ID One or more of the
specified filtering technique IDs were invalid.
STATUS_VIDEO_FLTRMODES_ARE_MUTUALLY_EXCLUSIVE At least one of the
specified filtering techniques on one of the video present sources
invalidates another specified filtering technique on another video
present source in the specified VidPN.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_TARGET Video mode was not
pinned on one or more video present targets. A functional VidPN
implementation must be provided.
STATUS_VIDEO_MODE_NOT_PINNED_ON_VIDPN_SOURCE Video present source
mode was not pinned on one or more video present sources. A
functional VidPN implementation must be provided. Side-effects
None. Remarks This DDIs selects a filtering technique for each
video present source in the VidPN from the sets of filtering
techniques available on the respective video present sources,
enumerated using EnumCurrentlyAvailFilteringTechniqueSets. Zero
filtering technique ID represents no filtering. This DDI should be
used when the specified distribution of filtering techniques across
the video present sources for a given VidPN is known to work, such
as the case when OS logs a known user in, or, on a previously
encountered monitor HPD event induced VidPN, where a previously
used configuration can be reused.
TABLE-US-00026 TABLE 26 Function Filtering_Techniques_Set Name
FILTERING_TECHNIQUES_SET Purpose Filtering techniques set
Definition typedef struct _FILTERING_TECHNIQUES_SET { DWORD
dwNumOfFilteringTechniques; PFILTERING_TECHNIQUE
pFilteringTechniques; } FILTERING_TECHNIQUES_SET,
*PFILTERING_TECHNIQUES_SET; Fields Name Description
dwNumOfFilteringTechniques Number of filtering techniques in the
set. pFilteringTechniques Array of set's elements (number of
entries is determined by dwNumOfFilteringTechniques). Remarks
Filtering techniques sets are used to describe sets of available
filtering techniques on the video present sources in a given VidPN
implementation.
TABLE-US-00027 TABLE 27 Function Filtering_Technique Name
FILTERING_TECHNIQUE Purpose Filtering technique descriptor.
Definition typedef enum _FILTERING_TECHNIQUE { TBD } VIDEO_MODE,
*PVIDEO_MODE; Remarks Filtering technique specifies what filtering
algorithm GPU and/or video output codec uses to process the video
present source's primary surface while converting the rendered
frame into a video mode field.
TABLE-US-00028 TABLE 28 Function Video_Present_Target Name
VIDEO_PRESENT_TARGET Purpose Video present target descriptor.
Definition typedef struct _VIDPT { VIDEO_OUTPUT_TECHNOLOGY
VideoOutputTechnology; VIDEO_OUTPUT_HPD_AWARENESS
VideoOutputHPDAwareness; DWORD dwCharacteristics; }
VIDEO_PRESENT_TARGET, *PVIDEO_PRESENT_TARGET; Fields Name
Description VideoOutputTechnology Type of the video output
technology (see VIDEO_OUTPUT_TECHNOLOGY for more details).
VideoOutputHPDAwareness Type of the video output's HPD awareness
(see VIDEO_OUTPUT_HPD_AWARENESS for more details).
dwCharacteristics Bit array describing predicative characteristics
of the video output, with the following flags defined: TBD Remarks
OS obtains descriptors for each video output in the VidPN by
enumerating them with EnumAvailVidPNTargets.
TABLE-US-00029 TABLE 29 Function Video_Output_Technology Name
VIDEO_OUTPUT_TECHNOLOGY Purpose Video output technology descriptor.
Definition typedef enum _VIDEO_OUTPUT_TECHNOLOGY {
VOT_Uninitialized = 0, VOT_HD15 = 1, VOT_DVI = 2, VOT_HDMI = 3,
VOT_HDMI2 = 4, VOT_SVideo_4pin = 5, VOT_SVideo_7pin = 6,
VOT_RCA_composite = 7, VOT_RCA_3component = 8, VOT_BNC = 9, VOT_RF
= 10, VOT_Other = 255 } VIDEO_OUTPUT_TECHNOLOGY,
*PVIDEO_OUTPUT_TECHNOLOGY; Remarks Video output technology is used
to determine the hard-coded list of video modes supported by the
monitor, when monitor descriptor is not available. Filtering
technique is a video output codec input characteristic. YUV->RGB
transformation is a video output codec output characteristic.
Defaults recommendation to IHVs: SD -> 601, HD -> 709. This
could be wrong so you want to be able to override it.
TABLE-US-00030 TABLE 30 Function Video_Output_HPD_Awareness Name
VIDEO_OUTPUT_HPD_AWARENESS Purpose Video output HPD awareness
descriptor. Definition typedef enum _VIDEO_OUTPUT_HPD_AWARENESS {
VOHPD_Uninitialized = 0, VOHPD_None = 1 VOHPD_DestructivelyPolled =
2, VOHPD_NonDestructivelyPolled = 3, VOHPD_Interruptible = 4 }
VIDEO_OUTPUT_HPD_AWARENESS, *PVIDEO_OUTPUT_HPD_AWARENESS; Remarks
Video output HPD awareness is used to represent the level of
monitor connectivity sensed by a video card on its video output.
Video output has: 4. Interruptible HPD-awareness iff display
miniport can asynchronously notify the OS about monitor
arrivals/departures. 5. Non-Destructively Polled HPD-awareness iff
display miniport can report monitor arrivals/departures to the OS
only by periodically polling the underlying h/w, without causing
visual artifacts. 6. Destructively Polled HPD-awareness iff display
miniport can report monitor arrivals/departures to the OS only by
sporadically polling the underlying h/w, causing visual artifacts
on each poll. 7. No HPD-awareness iff display miniport is not aware
of monitor arrivals/departures and, hence, can not asynchronously
notify or synchronously report occurrences of such events to the
OS
TABLE-US-00031 TABLE 31 Function Video_Present_Source Name
VIDEO_PRESENT_SOURCE Purpose Video present source descriptor.
Definition typedef struct _VIDEO_PRESENT_SOURCE {
VIDEO_PRESENT_SOURCE_CONTENT_LAYOUT ContentLayout; DWORD
dwCharacteristics; } VIDEO_PRESENT_SOURCE, *PVIDEO_PRESENT_SOURCE;
Fields Name Description dwCharacteristics Bit array describing
predicative characteristics of the video present source, with the
following flags defined: TBD ContentLayout Type of the layout
format in which video present source's content is stored (see
VIDEO_PRESENT_SOURCE_CONTENT_LAYOUT for more details). Remarks OS
obtains descriptors for each video present source in the VidPN by
enumerating them with EnumAvailVidPNTargets.
TABLE-US-00032 TABLE 32 Function
Video_Present_Source_Content_Layout Name
VIDEO_PRESENT_SOURCE_CONTENT_LAYOUT Purpose Video present source
content's layout format. Definition typedef enum
_VIDEO_PRESENT_SOURCE_CONTENT_LAYOUT { VPSCL_Linear = 1,
VPSCL_Other = 2 } VIDEO_PRESENT_SOURCE_CONTENT_LAYOUT,
*PVIDEO_PRESENT_SOURCE_CONTENT_LAYOUT; Remarks Video present
source's layout format is used to determine how the content of the
image is arranged in the respective primary surface.
TABLE-US-00033 TABLE 33 Function Video_Present_Path Name
VIDEO_PRESENT_PATH Purpose Video present target to source mapping.
Definition typedef struct _VIDEO_PRESENT_PATH {
PVIDEO_PRESENT_TARGET pVidPT; PVIDEO_PRESENT_SOURCE pVidPS; }
VIDEO_PRESENT_PATH, *PVIDEO_PRESENT_PATH; Remarks This type is used
to describe a mapping from a single video present target to a
single video present source in a VidPN.
TABLE-US-00034 TABLE 34 Function VidPN_Topology Name VIDPN_TOPOLOGY
Purpose VidPN topology descriptor. Definition typedef struct
_VIDPN_TOPOLOGY { DWORD dwNumOfVidPresentPaths; VIDEO_PRESENT_PATH
arr_pVidPresentPaths[1]; } VIDPN_TOPOLOGY, *PVIDPN_TOPOLOGY; Fields
Name Description dwNumOfVidPresentPaths Number of video modes in
the set. arr_pVidPresentPaths Array of dwNumOfVidPresentPaths
elements of the video present paths in the VidPN topology. Remarks
This type is used to describe VidPNs in CreateVidPNImpl and
GetCurrentVidPNTopology.
TABLE-US-00035 TABLE 35 Function VidPN_Impl Name VIDPN_IMPL Purpose
VidPN implementation handle. Definition typedef ULONG_PTR
VIDPN_IMPL, *PVIDPN_IMPL; Remarks This type is used to describe
handles to VidPN implementations returned by the display miniport
for a particular VidPN.
TABLE-US-00036 TABLE 36 Function Video_Present_Target_Mode_Set Name
VIDEO_PRESENT_TARGET_MODE_SET Purpose Video mode set descriptor.
Definition typedef struct _VIDEO_PRESENT_TARGET_MODE_SET { DWORD
dwNumOfModes; VIDEO_PRESENT_TARGET_MODE arr_vidptModes[1]; }
VIDEO_PRESENT_TARGET_MODE_SET, *PVIDEO_PRESENT_TARGET_MODE_SET;
Fields Name Description dwNumOfModes Number of video modes in the
set. arr_vidptModes Array of dwNumOfModes elements of the video
mode set. Remarks Video mode sets are used to describe sets of
available video modes on the video present targets in a given VidPN
implementation.
TABLE-US-00037 TABLE 37 Function Video_Present_Target_Mode Name
VIDEO_PRESENT_TARGET_MODE Purpose Video mode descriptor. Definition
typedef struct _VIDEO_PRESENT_TARGET_MODE { VIDEO_SIGNAL_STANDARD
vidStandard; SIZE sizeTotal; SIZE sizeActive; SIZE
sizeActiveOffset; SIZE sizeTLDeltaVisibleFromActive; SIZE
sizeBRDeltaVisibleFromActive; FRACTIONAL_FREQUENCY frqVSync;
FRACTIONAL_FREQUENCY frqHSync; DWORD dwPixelRate;
VIDEO_SIGNAL_SCANLINE_ORDERING ScanLineOrdering; BOOLEAN bIsGTF;
BOOLEAN bIsPreferred; BOOLEAN bIsKnownToBeSupportedByMonitor; }
VIDEO_PRESENT_TARGET_MODE, *PVIDEO_PRESENT_TARGET_MODE; Fields Name
Description vidStandard Video mode standard this mode is defined by
(if any). sizeTotal Total region size (in pixels) sizeActive Active
region size (in pixels), also known as production aperture.
sizeActiveOffset Offset of the active region's top-left corner with
respect to total region's top-left corner.
sizeTLDeltaVisibleFromActive Monitor screen's delta of visible
pixels' top-left corner from video signal's active pixels top-left
corner. Note: Default = (0, 0). sizeBRDeltaVisibleFromActive
Monitor screen's delta of visible pixels' bottom- right corner from
video signal's active pixels bottom-right corner. Note: Default =
(0, 0). frqVSync Vertical refresh frequency (in Hz). frqHSync
Horizontal refresh frequency (in KHz). dwPixelRate Pixel clock
rate. ScanLineOrdering Scan line ordering (e.g. progressive,
interlaced). bIsPreferred Predicate specifying whether this mode is
preferred by the monitor connected to the respective video output.
bIsGTF Predicate specifying whether this mode's VSync, HSync, and
clock rate comply with the restrictions imposed by the VESA
Generalized Timing Formula. bIsKnownToBeSupportedByMonitor
Predicate specifying whether this mode is known to be supported by
the connected monitor. By setting this field to TRUE, video
miniport will make sure this particular mode survives OS monitor-
capability based mode pruning, even if the monitor doesn't list
support for it. Remarks Video mode is the mode of operation of a
given video output that's driving a connected monitor, and is
driven by an internal video output codec. Note that this descriptor
supersedes subset of the VIDEO_MODE_INFORMATION structure related
to video mode. In XDDM, both video and video present source modes
were described in this struct. LDDM separates these two notions,
and hence their descriptors. The video standard field, vidStandard,
should be used for video mode comparisons, when it's set to a
well-defined video standard. Note that most of the standard modes
do not comply with the VESA GTF frequency constraints. The
monitor-capability based pruning-override field,
bIsKnownToBeSupportedByMonitor, lets video IHVs specify additional
video modes which they know are supported by the monitor their
video card is attached to, but which are not specified in the
monitor's descriptor. This is most useful for monitors which have
no descriptors and information about their capabilities is instead
stored in a proprietary format in the BIOS by the OEM who produces
the final integrated solution. This override should be used
sparingly and only reserved for cases where there is no other way
to expose a mode which is known to work for a given monitor! Video
miniport should never enumerate a mode which is listed as supported
by the monitor descriptor with this field set to TRUE.
TABLE-US-00038 TABLE 38 Function Video_Signal_Standard Name
VIDEO_SIGNAL_STANDARD Purpose Video mode standard descriptor,
listing standards that are explicitly supported by Windows.
Definition typedef enum _VIDEO_SIGNAL_STANDARD { NTSC_M, NTSC_J,
NTSC_443, PAL_B, PAL_B1, PAL_G, PAL_H, PAL_I, PAL_D, PAL_N, PAL_NC,
SECAM_B, SECAM_D, SECAM_G, SECAM_H, SECAM_K, SECAM_K1, SECAM_L,
SECAM_L1, EIA_861_1, EIA_861_2, EIA_861_3, EIA_861_4, EIA_861_5,
EIA_861_6, EIA_861_7, EIA_861_8, EIA_861_9, EIA_861_10, EIA_861A_1,
EIA_861A_2, EIA_861A_3, EIA_861A_4, EIA_861B_1, EIA_861B_2,
EIA_861B_3, EIA_861B_4, EIA_861B_5, EIA_861B_6, EIA_861B_7, IBM_1,
IBM_2, IBM_3, IBM_4, APPLE_1, APPLE_2, APPLE_3, VESA_1, VESA_2,
VESA_3, VESA_4, VESA_5, VESA_6, VESA_7, VESA_8, VESA_9, VESA_10,
VDMT_1, VDMT_2, VDMT_3, VDMT_4, VDMT_5, VDMT_6, VDMT_7, VDMT_8,
VDMT_9, VDMT_10, VDMT_11, VDMT_12, VDMT_13, VDMT_14, VDMT_15,
VDMT_16, VDMT_17, VDMT_18, VDMT_19, VDMT_20, VDMT_21, VDMT_22,
VDMT_23, VDMT_24, VDMT_25, VDMT_26, VDMT_27, VDMT_28, VDMT_29,
VDMT_30, VDMT_31, VDMT_32, VDMT_33, VDMT_34, GTF, Other }
VIDEO_SIGNAL_STANDARD, *PVIDEO_SIGNAL_STANDARD; This enum should be
used to simplify video mode comparisons, when appropriate (i.e. not
Other). The following table lists some of the basic parameters of
these modes. Vsync Width Height rate Hsync rate Pixel clock Content
Name (Pixels) (Pixels) (Hz) (Hz) rate (Hz) Ordering Remarks NTSC_M
720 525 59.94 15,734.27 3,579,545 Interlaced NTSC_J 720 525 59.94
15,734.27 3,579,545 Interlaced NTSC_443 720 525 59.94 15,734.27
4,433,618.75 Interlaced PAL_B 720 625 50 15,625 4,433,618.75
Interlaced PAL_B1 720 625 50 15,625 4,433,618.75 Interlaced PAL_G
720 625 50 15,625 4,433,618.75 Interlaced PAL_H 720 625 50 15,625
4,433,618.75 Interlaced PAL_I 720 625 50 15,625 4,433,618.75
Interlaced PAL_D 720 525 59.94 15,734 3,575,611.49 Interlaced PAL_N
720 625 50 15,625 4,433,618.75 Interlaced PAL_NC 720 625 50 15,625
3,582,056.25 Interlaced SECAM_B 720 625 50 15,625 Interlaced
SECAM_D 720 625 50 15,625 Interlaced SECAM_G 720 625 50 15,625
Interlaced SECAM_H 720 625 50 15,625 Interlaced SECAM_K 720 625 50
15,625 Interlaced SECAM_K1 720 625 50 15,625 Interlaced SECAM_L 720
625 50 15,625 Interlaced SECAM_L1 720 625 50 15,625 Interlaced
EIA_861_1 720 480 59.94 Interlaced EIA_861_2 720 480 60 Interlaced
EIA_861_3 640 480 59.94 Progressive EIA_861_4 640 480 60
Progressive EIA_861_5 720 480 59.94 Progressive EIA_861_6 720 480
60 Progressive EIA_861_7 1280 720 59.94 Progressive EIA_861_8 1280
720 60 Progressive EIA_861_9 1920 1080 59.94 Interlaced EIA_861_10
1920 1080 60 Interlaced EIA_861A_1 720 576 50 Interlaced EIA_861A_2
720 576 50 Progressive EIA_861A_3 1280 720 50 Progressive
EIA_861A_4 1920 1080 50 Interlaced EIA_861B_1 1920 1080 23.96
Progressive EIA_861B_2 1920 1080 24 Progressive EIA_861B_3 1920
1080 25 Progressive EIA_861B_4 1920 1080 29.97 Progressive
EIA_861B_5 1920 1080 30 Progressive EIA_861B_6 1920 1080 50
Progressive EIA_861B_7 1920 1080 60 Progressive IBM_1 720 400 70
Progressive IBM_2 720 400 88 Progressive IBM_3 640 480 60
Progressive IBM_4 1024 768 87 Interlaced APPLE_1 640 480 67
Progressive APPLE_2 832 624 75 Progressive APPLE_3 1152 870 75
Progressive VESA_1 640 480 72 Progressive VESA_2 640 480 75
Progressive VESA_3 800 600 56 Progressive VESA_4 800 600 60
Progressive VESA_5 800 600 72 Progressive VESA_6 800 600 75
Progressive VESA_7 1024 768 60 Progressive VESA_8 1024 768 70
Progressive VESA_9 1024 768 75 Progressive VESA_10 1280 1024 75
Progressive VDMT_1 640 350 85 37,900 31,500,000 Progressive VDMT_2
640 400 85 37,900 31,500,000 Progressive VDMT_3 720 400 85 37,900
35,500,000 Progressive VDMT_4 640 480 60 31,500 25,175,000
Progressive VDMT_5 640 480 72 37,900 31,500,000 Progressive VDMT_6
640 480 75 37,500 31,500,000 Progressive VDMT_7 640 480 85 43,300
36,000,000 Progressive VDMT_8 800 600 56 35,100 36,000,000
Progressive VDMT_9 800 600 60 37,900 40,000,000 Progressive VDMT_10
800 600 72 48,100 50,000,000 Progressive VDMT_11 800 600 75 46,900
49,500,000 Progressive VDMT_12 800 600 85 53,700 56,250,000
Progressive VDMT_13 1024 768 43 35,500 44,900,000 Interlaced
VDMT_14 1024 768 60 48,400 65,000,000 Progressive VDMT_15 1024 768
70 56,500 75,000,000 Progressive VDMT_16 1024 768 75 60,000
78,750,000 Progressive VDMT_17 1024 768 85 68,700 94,500,000
Progressive VDMT_18 1152 864 75 67,500 108,000,000 Progressive
VDMT_19 1280 960 60 60,000 108,000,000 Progressive VDMT_20 1280 960
85 85,900 148,500,000 Progressive VDMT_21 1280 1024 60 64,000
108,000,000 Progressive VDMT_22 1280 1024 75 80,000 135,000,000
Progressive VDMT_23 1280 1024 85 91,100 157,500,000 Progressive
VDMT_24 1600 1200 60 75,000 162,000,000 Progressive VDMT_25 1600
1200 65 81,300 175,500,000 Progressive VDMT_26 1600 1200 70 87,500
189,000,000 Progressive VDMT_27 1600 1200 75 93,800 202,500,000
Progressive VDMT_28 1600 1200 85 106,300 229,500,000 Progressive
VDMT_29 1792 1344 60 83,640 204,750,000 Progressive VDMT_30 1792
1344 75 106,270 261,000,000 Progressive VDMT_31 1856 1392 60 86,330
218,250,000 Progressive VDMT_32 1856 1392 75 112,500 288,000,000
Progressive VDMT_33 1920 1440 60 90,000 234,000,000 Progressive
VDMT_34 1920 1440 75 112,500 297,000,000 Progressive
TABLE-US-00039 TABLE 39 Function Video_Signal_Scanline_Ordering
Name VIDEO_SIGNAL_SCANLINE_ORDERING Purpose Scan line ordering
descriptor. Definition typedef enum _VIDEO_SIGNAL_SCANLINE_ORDERING
{ SLO_Uninitialized = 0, SLO_Progressive = 1,
SLO_Interlaced_UpperFieldFirst = 2, SLO_Interlaced_LowerFieldFirst
= 3, SLO_Other = 255 } VIDEO_SIGNAL_SCANLINE_ORDERING,
*PVIDEO_SIGNAL_SCANLINE_ORDERING; Remarks Scan-line ordering of the
video mode, specifies whether each field contains the entire
content of a frame, or only half of it (i.e. even/odd lines
interchangeably). Note that while for standard interlaced modes,
what field comes first can be inferred from the mode, specifying
this characteristic expliclty with an enum both frees up the client
from having to maintain mode-based look-up tables and is extensible
for future standard modes not listed in the VIDEO_MODE_STD
enum.
TABLE-US-00040 TABLE 40 Function Fractional_Frequency Name
FRACTIONAL_FREQUENCY Purpose Video mode fractional frequency
descriptor. Definition typedef struct _FRACTIONAL_FREQUENCY { DWORD
dwNumerator; DWORD dwDenominator; } FRACTIONAL_FREQUENCY,
*PFRACTIONAL_FREQUENCY; Fields Name Description dwNumerator
Fractional frequency numerator. dwDenominator Fractional frequency
denominator. Remarks Fractional value used to represent vertical
and horizontal frequencies of a video mode (i.e. VSync and HSync).
Vertical frequencies are stored in Hz. Horizontal frequencies are
stored in KHz. The dynamic range of this encoding format, given
10{circumflex over ( )}-7 resolution is {0 . . . 2{circumflex over
( )}32 - 1/10{circumflex over ( )}7}, which translates to {0 . . .
428.4967296} [Hz] for vertical frequencies and {0 . . .
428.4967296} [KHz] for horizontal frequencies. This
sub-microseconds precision range should be acceptable even for a
pro-video application (error in one microsecond for video signal
synchronization would imply a time drift with a cycle of
10{circumflex over ( )}7/(60 * 60 * 24) = 115.741 days.
TABLE-US-00041 TABLE 41 Function Video_Present_Source_Mode_Set Name
VIDEO_PRESENT_SOURCE_MODE_SET Purpose Video present source mode set
descriptor. Definition typedef struct
_VIDEO_PRESENT_SOURCE_MODE_SET { DWORD dwNumOfModes;
VIDEO_PRESENT_SOURCE_MODE arr_vidpsModes[1]; }
VIDEO_PRESENT_SOURCE_MODE_SET, *PVIDEO_PRESENT_SORCE_MODE_SET;
Fields Name Description dwNumOfModes Number of video present source
modes in the set. pvidpsModes Array of dwNumOfModes elements of the
video present source mode set. Remarks Video present source mode
sets are used to describe sets of available video present source
modes on the video present sources in a given VidPN
implementation.
TABLE-US-00042 TABLE 42 Function Video_Present_Source_Mode Name
VIDEO_PRESENT_SOURCE_MODE Purpose Video present source mode
descriptor. Definition typedef struct .sub.--
VIDEO_PRESENT_SOURCE_MODE { VIDEO_PRESENT_SOURCE_MODE_TYPE type;
union { GRAPHICS_RENDERING_FORMAT grfxFormat; // if (type ==
Graphics) TEXT_RENDERING_FORMAT textFormat; // if (type == Text) }
} VIDEO_PRESENT_SOURCE_MODE, *P VIDEO_PRESENT_SOURCE_MODE; Fields
type Specifies whether the mode is a graphics or a text video
present source mode. grfxFormat Descriptor of the graphics video
present source mode (valid only if (type==Graphics). textFormat
Descriptor of the text video present source mode (valid only if
(type==Graphics). Remarks Video present source mode is the mode of
operation of a given video present source. Video present source
mode determines the format of the video present source's primary
surface to which the graphics subsystem is rendering the visual
image to be presented to the user, and from which the video output
codec is reading the visual image content to be converted into a
respective video mode signal.
TABLE-US-00043 TABLE 43 Function Video_Present_Source_Mode_Type
Name VIDEO_PRESENT_SOURCE_MODE_TYPE Purpose Video present source
mode enumeration type descriptor. Definition typedef enum .sub.--
VIDEO_PRESENT_SOURCE_MODE_TYPE { RMT_Uninitialized = 0,
RMT_Graphics = 1, RMT_Text = 2 } VIDEO_PRESENT_SOURCE_MODE_TYPE,
*PVIDEO_PRESENT_SOURCE_MODE_TYPE; Remarks This type is used to
specify whether the video present source mode is a graphics or a
text video present source mode (see VIDEO_PRESENT_SOURCE_MODE for
more details).
TABLE-US-00044 TABLE 44 Function Graphics_Rendering_Format Name
GRAPHICS_RENDERING_FORMAT Purpose Graphics video present source
mode descriptor. Definition typedef struct
_GRAPHICS_RENDERING_FORMAT { SIZE sizePrimSurf; SIZE sizeVisible;
DWORD dwStride; PIXEL_FORMAT PixelFormat; COLOR_ACCESS_MODE
clrAccessMode; } GRAPHICS_RENDERING_FORMAT,
*PGRAPHICS_RENDERING_FORMAT; Fields sizePrimSurf Size of the
primary surface required for this video present source mode.
sizeVisible Size of the visible part of the primary surface, used
for panned modes including zoom modes. dwStride Number of bytes
between the start of one scan line and the next. PixelFormat Pixel
format (e.g. break down into individual sub- channels)
clrAccessMode Access mode for the pixel color information Remarks
Graphics video present source mode is the dominantly used subtype
of the video present source modes (other being the text video
present source mode). Note that whenever video present source
mode's visible size, GRAPHICS_VIDEO_PRESENT_SOURCE_MODE.sizeVisible
is not equal to the respective video mode's visible size,
VIDEO_MODE.sizeVisible, h/w scaling is undertaken by the video
output codec.
TABLE-US-00045 TABLE 45 Function Pixel_Format Name PIXEL_FORMAT
Purpose Graphics video present source mode pixel format descriptor.
Definition typedef struct _PIXEL_FORMAT { D3DFORMAT type;
COLOR_BASIS clrBasis; } Fields type Corresponding DirectX type of
the pixel format. clrBasis Color basis with respect to which the
pixel's color is expanded. Remarks Display miniport is free to
support any D3D pixel format for its graphics modes that is
meaningful as a primary surface pixel format. No validation for an
appropriately used pixel format shall be done in kernel- mode. If
this turns out to be a problem, WHQL can enforce a certain list of
pixel formats from user-mode. This descriptor does NOT include
pixel value sub-channel bit masks since: a. Primary argument for
exposing pixel value sub-channel bit masks is to allow application
developers write extensible code that can leverage future pixel
formats. b. As it stands, however, historically numerous
application developers have failed to properly implement generic
pixel value decoding algorithms and pixel value sub-channel bit
masks were dropped in DX8. c. Main idea: it's best to force
application developers to test every scenario they claim to support
by making them use look-up tables that map D3D pixel format enums
into pixel value sub-channel bit masks. d. To facilitate
application development, it would make sense to ship a helper
user-mode library that does the enum-to-bitmask mapping for the
application developers. They would still need to code their
application against existing pixel value formats but not maintain
look-up tables, for every application. e. Need for pixel value
sub-channel bitmasks exposure is further reduced by the fact that
they are only truly useful for linear surface formats with well
defined integer RGB encoded pixel values. i. When surface format
has a non-linear pixel layout (i.e. VIDPS.VidPSContentLayout =
VPSCL_Linear), knowledge of pixel value sub-channel bitmasks will
not help the developer to know how to access each pixel in the
surface. ii. Most four-CC formats (e.g. NVT4/NVT5) fall into this
category and one should test against every format to be supported
by the application, because most of them imply texture layouts that
aren't easily described. iii. Also the bitmasks won't work for
floating point pixel formats.
TABLE-US-00046 TABLE 46 Function Color_Access_Mode Name
COLOR_ACCESS_MODE Purpose Color access mode descriptor. Definition
typedef enum _COLOR_ACCESS_MODE { CAM_Uninitialized = 0, CAM_Direct
= 1, CAM_PresetPalette = 2, CAM_SettablePalette = 3 }
COLOR_ACCESS_MODE, *PCOLOR_ACCESS_MODE; Remarks Use Direct to
represent video present source modes with colors stored directly in
the primary surface. Use PresetPalette to represent video present
source modes with colors' indices stored in the primary surface and
actual color values stored in a palette specific to the video card,
that must be queried from the display miniport. Use SettablePalette
to represent video present source modes with colors' indices stored
in the primary surface and actual color values stored in a settable
palette that can be dynamically set on the video card, by
specifying it to the display miniport.
TABLE-US-00047 TABLE 47 Function Color_Basis Name COLOR_BASIS
Purpose Descriptor of the color basis with respect to which the
pixels' colors are expanded, or conversely, based on which the
color values are synthesized. Definition typedef enum _COLOR_BASIS
{ CB_Uninitialized = 0, CB_Intensity = 1, CB_sRGB = 2, CB_scRGB =
3, CB_YCbCr = 4, CB_YPbPr = 5 } COLOR_BASIS, *PCOLOR_BASIS; Remarks
The commonly used color bases in graphics industry are RGB, which
has the basis (red, green, blue), as well as YPbPr and YCbCr, which
have scaled variants of basis (1, blue-1, red-
1)*intensity(red,green,blue). Tri-stimulus linear RGB is well
suited for real-time rendering, since most filtering algorithms use
tri- stimulus values to approximate light's spectral
transformations caused by its interaction with the environment,
primarily due to the fact that there is a linear relationship
between the perceived light level and the light's spectral
intensity. Ideally, processing (e.g., all processing) of video
content (i.e. scaling, filtering, etc) should be performed in a
linear RGB space. Y'PbPr spaces store data using a nonlinear curve
which is approximately the inverse of a gamma 2.2 curve (i.e.
x{circumflex over ( )}0.45). This allows more precision to be
stored in darker intensities where the human eye is more sensitive.
sRGB (more accurately, sR'G'B') stores light intensities relative
to a gamma curve. scRGB stores linear values and requires much
higher precision to represent the same perceptually similar signal.
The light-intensity based YPbPr and YCbCr is better suited for
persistence of pre-rendered content, such as video streaming. This
is due to the fact that a human visual system is more responsive to
small differences in photons' intensity rather than frequency (i.e.
perceived color), and, hence, a light-intensity based color
expansion over a finite dynamic range, yields a better perceptual
image quality for the human eye than a tri-stimulus based color
expansion in that same range (e.g non-linear Y8Cb8Cr8 appears
slightly better than R8G8B8 and is comparable to R9G9B9). To
represent monochrome modes, use Intensity. Grayscale imaging is
heavily used in medical imaging. * Note: the apostrophe notation
Y'PbPr is used to remind you that you are working with non-linear
data.
TABLE-US-00048 TABLE 48 Function Text_Rendering_Format Name
TEXT_RENDERING_FORMAT Purpose Text video present source mode
format. Definition typedef TBD TEXT_RENDERING_FORMAT; Remarks Text
video present source modes are only supported for backwards
compatibility.
TABLE-US-00049 TABLE 49 Function Filtering_Technique Name
FILTERING_TECHNIQUE Purpose Filtering technique enumeration type.
Definition typedef D3DDDIMULTISAMPLE_TYPE FILTERING_TECHNIQUE,
*PFILTERING_TECHNIQUE; Remarks This type is used to specify what
type of filtering technique is used for rendering on the video
present source (e.g. 2 .times. 2/ 4 .times. 4
multisampling/supersampling, etc.).
Example 46
Exemplary Relative Importance of Monitors
[0371] In any of the examples herein, the video driver handling
multiple monitors (e.g., video miniport) can be asked to provide a
recommended functional configuration. In such a case, the relative
importance of the monitors can be specified. For example, the
monitors can be ranked (e.g., most important to least important).
The driver can then provide a configuration according to the
relative importance as specified.
Example 47
Exemplary Stateless Implementation
[0372] Some of the technologies described herein have been
described using an approach in which the video driver maintains a
state of the provisional configuration (e.g., as it is pinned and
unpinned). However, a stateless approach can also be employed. In
this way, the video driver need not track state (e.g., of the
provisional configuration) and may be made more lightweight and
less complex. If desired, the client software can track a state
during determination of a desired configuration.
[0373] In such an approach, a programming interface (e.g., a DDI)
can be used to pass information regarding a state of the
provisional configuration. For example, a data structure can be
used to hold the configuration details and passed through the
interface.
Example 48
Exemplary Stateless Driver Interface
[0374] The following is an exemplary kernel mode driver interface
(e.g., a DDI), including a stateless video presenting network
management miniport interface, for implementing a video presenting
network supporting the various technologies described herein. In
the example, a video presenting network is sometimes called a
"video present network" or "VidPN." A particular configuration for
the video present network is sometimes called a "VidPN
implementation." Also in the example, the word "miniport" is used,
but the technologies described within can be applied to any display
adapter or video driver.
[0375] An exemplary kernel mode driver can be part of a video
miniport. Each physical GPU can be treated as its own adapter,
where the adapter can be represented by the HANDLE hAdapter
retrieved below. If a single GPU has multiple outputs (e.g.,
heads), it may still be treated as a single adapter.
[0376] A miniport's HwVidQueryInterface function can be called with
the following QUERY_INTERFACE structure to retrieve driver entry
points:
TABLE-US-00050 QUERY_INTERFACE queryinterface;
queryinterface.InterfaceType = GUID_DEVINTERFACE_D3DDDI;
queryinterface.Size = sizeof(D3DKMDDI_INTERFACE);
queryinterface.Version = D3DDDI_INTERFACE_VERSION;
queryinterface.Interface = &pD3DKMDDIInterface;
queryinterface.InterfaceSpecificData =
&pD3DKMDDIInterfaceSpecificData;
[0377] The HwVidQueryInterface call returns NO_ERROR if the
interface was successfully retrieved; otherwise it should return
the appropriate error code. The driver entry points can be returned
in the D3DKMDDI_INTERFACE structure below. Querying the interface
may implicitly reference it. Thus, if initialization of the driver
fails after the interface has been queried, the interface
dereference function can be called without the driver having seen
an explicit reference.
TABLE-US-00051 typedef struct _D3DKMDDI_INTERFACE { USHORT Size;
USHORT Version; HANDLE hAdapter; VOID* pInterfaceReference; VOID*
pInterfaceDereference; // Exemplary adapter methods
PFND3DKMDDI_QUERYADAPTERINFO pfnQueryAdapterInfo;
PFND3DKMDDI_CREATEDEVICE pfnCreateDevice;
PFND3DKMDDI_CREATEALLOCATION pfnCreateAllocation;
PFND3DKMDDI_DESTROYALLOCATION pfnDestroyAllocation;
PFND3DKMDDI_ACQUIREAPERTURE pfnAcquireAperture;
PFND3DKMDDI_RELEASEAPERTURE pfnReleaseAperture;
PFND3DKMDDI_MAPAPERTURESEGMENT pfnMapApertureSegment;
PFND3DKMDDI_UNMAPAPERTURESEGMENT pfnUnmapApertureSegment;
PFND3DKMDDI_PATCH pfnPatch; PFND3DKMDDI_SUBMITCOMMAND
pfnSubmitCommand; PFND3DKMDDI_PREEMPTCOMMAND pfnPreemptCommand;
PFND3DKMDDI_SETPOINTERSHAPE pfnSetPointerShape;
PFND3DKMDDI_SETPOINTERPOSITION pfnSetPointerPosition;
PFND3DKMDDI_BUILDPAGINGBUFFER pfnBuildPagingBuffer;
PFND3DKMDDI_ESCAPE pfnEscape; PFND3DKMDDI_QUERYCURRENTFENCE
pfnQueryCurrentFence; PFND3DKMDDI_SETMODE pfnSetMode;
PFND3DKMDDI_SETOUTPUTSTATE pfnSetOutputState; // Exemplary adapter
VidPN management methods PFND3DKMDDI_ENUMVIDEOPRESENTSOURCESET
pfnEnumVideoPresentSourceSet; PFND3DKMDDI_ENUMVIDEOPRESENTTARGETSET
pfnEnumVideoPresentTargetSet; PFND3DKMDDI_ISSUPPORTEDVIDPN
pfnIsSupportedVidPN; PFND3DKMDDI_ENUMCOFUNCVIDPNSOURCEIDSET
pfnEnumCofuncVidPNSourceIDSet;
PFND3DKMDDI_ENUMCOFUNCVIDPNTARGETIDSET
pfnEnumCofuncVidPNTargetIDSet; PFND3DKMDDI_ENUMVIDPNCOFUNCMODALITY
pfnEnumVidPNCofuncModality; PFND3DKMDDI_RECOMMENDFUNCTIONALVIDPN
pfnRecommendFunctionalVidPN; // Exemplary device methods
PFND3DKMDDI_DESTROYDEVICE pfnDestroyDevice;
PFND3DKMDDI_OPENALLOCATION pfnOpenAllocation;
PFND3DKMDDI_CLOSEALLOCATION pfnCloseAllocation; PFND3DKMDDI_RENDER
pfnRender; PFND3DKMDDI_PRESENT pfnPresent; } D3DKMDDI_INTERFACE;
typedef NTSTATUS (APIENTRY *PFND3DKMDDI_QUERYADAPTERINFO)(HANDLE
hAdapter, CONST D3DKMDDIARG_QUERYADAPTERINFO*); typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_CREATEDEVICE)(HANDLE hAdapter,
D3DKMDDIARG_CREATEDEVICE*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_CREATEALLOCATION)(HANDLE hAdapter,
D3DKMDDIARG_CREATEALLOCATION*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_DESTROYALLOCATION)(HANDLE hAdapter, CONST
D3DKMDDIARG_DESTROYALLOCATION*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ACQUIREAPERTURE)(HANDLE hAdapter,
D3DKMDDIARG_ACQUIREAPERTURE*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_RELEASEAPERTURE)(HANDLE hAdapter, CONST
D3DKMDDIARG_RELEASEAPERTURE*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_MAPAPERTURESEGMENT)(HANDLE hAdapter, CONST
D3DKMDDIARG_MAPAPERTURESEGMENT*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_UNMAPAPERTURESEGMENT)(HANDLE hAdapter, CONST
D3DKMDDIARG_UNMAPAPERTURESEGMENT*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_PATCH)(HANDLE hAdapter, CONST D3DKMDDIARG_PATCH*);
typedef NTSTATUS (APIENTRY *PFND3DKMDDI_SUBMITCOMMAND)(HANDLE
hAdapter, CONST D3DKMDDIARG_SUBMITCOMMAND*); typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_PREEMPTCOMMAND)(HANDLE hAdapter, CONST
D3DKMDDIARG_PREEMPTCOMMAND*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_SETPOINTERSHAPE)(HANDLE hAdapter, CONST
D3DKMDDIARG_SETPOINTERSHAPE*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_SETPOINTERPOSITION)(HANDLE hAdapter, CONST
D3DKMDDIARG_SETPOINTERPOSITION*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_BUILDPAGINGBUFFER)(VOID*,
D3DKMDDIARG_BUILDPAGINGBUFFER*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ESCAPE)(HANDLE hAdapter, D3DKMDDIARG_ESCAPE*); typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_QUERYCURRENTFENCE)(HANDLE hAdapter,
ULARGE_INTEGER*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_SETMODE)(HANDLE hAdapter, D3DKMDDIARG_SETMODE*);
typedef NTSTATUS (APIENTRY *PFND3DKMDDI_SETOUTPUTSTATE)(HANDLE
hAdapter, D3DKMDDIARG_SETOUTPUTSTATE*); // Exemplary VidPN
management methods typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ENUMVIDEOPRESENTSOURCESET)(HANDLE hAdapter,
D3DKMDDIARG_ENUMVIDEOPRESENTSOURCESET*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ENUMVIDEOPRESENTTARGETSET)(HANDLE hAdapter,
D3DKMDDIARG_ENUMVIDEOPRESENTTARGETSET*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ISSUPPORTEDVIDPN)(HANDLE hAdapter,
D3DKMDDIARG_ISSUPPORTEDVIDPN*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_ENUMCOFUNCVIDPNSOURCEIDSET)(HANDLE hAdapter,
D3DKMDDIARG_ENUMCOFUNCVIDPNSOURCEIDSET*); typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_ENUMCOFUNCVIDPNTARGETIDSET)(HANDLE hAdapter,
D3DKMDDIARG_ENUMCOFUNCVIDPNTARGETIDSET*); typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_ENUMVIDPNCOFUNCMODALITY)(HANDLE hAdapter,
D3DKMDDIARG_ENUMVIDPNCOFUNCMODALITY*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_RECOMMENDFUNCTIONALVIDPN)(HANDLE hAdapter,
D3DKMDDIARG_RECOMMENDFUNCTIONALVIDPN*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_DESTROYDEVICE)(HANDLE hDevice); typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_OPENALLOCATION)(HANDLE hDevice, CONST
D3DKMDDIARG_OPENALLOCATION*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_CLOSEALLOCATION)(HANDLE hDevice, CONST
D3DKMDDIARG_CLOSEALLOCATION*); typedef NTSTATUS (APIENTRY
*PFND3DKMDDI_RENDER)(HANDLE hDevice, D3DKMDDIARG_RENDER*); typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_PRESENT)(HANDLE hDevice,
D3DKMDDIARG_PRESENT*);
[0378] The returned hAdapter in the D3DKMDDI_INTERFACE structure
can be passed as the context for pInterfaceReference and
pInterfaceDereference. It can also be passed in the hAdapter
parameter for the adapter functions in the interface.
TABLE-US-00052 typedef struct _D3DKMDDI_INTERFACESPECIFICDATA {
HANDLE hAdapter; // Exemplary D3DKMDDI interface callback functions
PFND3DKMDDI_GETHANDLEDATACB pfnGetHandleDataCb;
PFND3DKMDDI_GETHANDLEPARENTCB pfnGetHandleParentCb;
PFND3DKMDDI_ENUMHANDLECHILDRENCB pfnEnumHandleChildrenCb;
PFND3DKMDDI_NOTIFY_DMAINTERRUPTCB pfnNotifyDmaInterruptCb;
PFND3DKMDDI_NOTIFY_DMADPCCB pfnNotifyDmaDpcCb;
PFND3DKMDDI_ALLOCSYSMEMFOROUTPARAMCB pfnAllocSysMemForOutParamCb;
PFND3DKMDDI_FREESYSMEMFOROUTPARAMCB pfnFreeSysMemForOutParamCb; }
D3DKMDDI_INTERFACESPECIFICDATA; typedef HANDLE (APIENTRY CALLBACK
*PFND3DKMDDI_GETHANDLEPARENTCB)(HANDLE hDevice, D3DKMT_HANDLE);
typedef VOID* (APIENTRY CALLBACK
*PFND3DKMDDI_GETHANDLEDATACB)(HANDLE hDevice, CONST
D3DKMDDIARGCB_GETHANDLEDATA*); typedef HANDLE (APIENTRY CALLBACK
*PFND3DKMDDI_ENUMHANDLECHILDRENCB)(HANDLE hDevice, CONST
D3DKMDDIARGCB_ENUMHANDLECHILDREN*); typedef NTSTATUS (APIENTRY
CALLBACK *PFND3DKMDDI_NOTIFY_DMAINTERRUPTCB)(HANDLE hAdapter, CONST
D3DKMDDIARG_NOTIFY_DMAINTERRUPT_DATA*); typedef NTSTATUS (APIENTRY
CALLBACK *PFND3DKMDDI_NOTIFY_DMADPCCB)(HANDLE hAdapter, CONST
D3DKMDDIARG_NOTIFY_DMADPC_DATA*); typedef VOID* (APIENTRY CALLBACK
*PFND3DKMDDI_ALLOCSYSMEMFOROUTPARAMCB)(IN POOL_TYPE, IN SIZE_T);
typedef VOID (APIENTRY CALLBACK
*PFND3DKMDDI_FREESYSMEMFOROUTPARAMCB)(VOID*);
[0379] The interface specific data can contain pointers to callback
functions in the runtime that the driver can call. The hAdapter can
be the runtime's adapter handle and can be passed for callbacks
requesting an adapter handle.
[0380] In addition to the above interfaces, the following legacy
IOCTLs can also be used:
TABLE-US-00053 IOCTL_VIDEO_RESET_DEVICE
IOCTL_VIDEO_SET_COLOR_REGISTERS
IOCTL_VIDEO_QUERY_POINTER_CAPABILITIES
IOCTL_VIDEO_QUERY_COLOR_CAPABILITIES
IOCTL_VIDEO_QUERY_NUM_AVAIL_MODES IOCTL_VIDEO_QUERY_AVAIL_MODES
TABLE-US-00054 TABLE 50 Function EnumVideoPresentSourceSet typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_ENUMVIDEOPRESENTSOURCESET) (IN
HANDLE hAdapter, OUT D3DKMDDIARG_ENUMVIDEOPRESENTSOURCESET*
pEnumVideoPresentSourceSetArg); typedef struct
_D3DKMDDIARG_ENUMVIDEOPRESENTSOURCESET { OUT
D3DKMDDI_VIDEO_PRESENT_SOURCE_SET* pVideoPresentSourceSet; }
D3DKMDDIARG_ENUMVIDEOPRESENTSOURCESET;
[0381] EnumVideoPresentSourceSet can be called for each display
adapter in the system by the VidPN manager instance that is driving
the post-rendering video presentational capabilities of the
respective display adapter in order to obtain a list of video
present sources that the specified display adapter has.
[0382] The miniport can allocate a large enough buffer in system
memory to contain the requested set of video present sources for
the specified display adapter using the AllocSysMemForOutParamCb
callback provided to it by the operating system via the
INTERFACESPECIFICDATA interface. The size of the allocation should
be
sizeof(D3DKMDDI_VIDEO_PRESENT_SOURCE_SET)+sizeof(DDKMDDI_VIDEO_PRESENT_SO-
URCE)*(# of video present sources-1).
[0383] Once the memory for the output parameter has been allocated,
the miniport can populate it based on the definitions below:
TABLE-US-00055 typedef struct _D3DKMDDI_VIDEO_PRESENT_SOURCE_SET {
SIZE_T NumOfVideoPresentSources; D3DKMDDI_VIDEO_PRESENT_SOURCE
VideoPresentSources[1]; } D3DKMDDI_VIDEO_PRESENT_SOURCE_SET;
where: [0384] NumOfVideoPresentSources--Number of video present
sources listed in VideoPresentSources. [0385]
VideoPresentSources--Address of the array of video present source
descriptors in the set. Actual number of elements is specified in
NumOfVideoPresentSources. With the video present source descriptor
defined as follows:
TABLE-US-00056 [0385] typedef struct _D3DKMDDI_VIDEO_PRESENT_SOURCE
{ D3DKMDDI_VIDEO_PRESENT_SOURCE_ID VideoPresentSourceID; DWORD
dwReserved; } D3DKMDDI_VIDEO_PRESENT_SOURCE;
where: [0386] VideoPresentSourceID--Unique ID used to reference the
respective video present source by the miniport and the operating
system. [0387] dwReserved--Other video present source descriptor
properties go here With the video present source ID defined as:
[0388] typedef UINT D3DKMDDI_VIDEO_PRESENT_SOURCE_ID;
[0389] On successful return from this function, the operating
system can take ownership of the lifetime of the data returned in
the output parameter and can deallocate the memory taken by its
supporting allocation when it is done with it.
Return Codes
[0390] STATUS_SUCCESS indicates that the driver handled the call
successfully.
TABLE-US-00057 TABLE 51 Function EnumVideoPresentTargetSet typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_ENUMVIDEOPRESENTTARGETSET) (IN
HANDLE hAdapter, OUT D3DKMDDIARG_ENUMVIDEOPRESENTTARGETSET*
pEnumVideoPresentTargetSetArg); typedef struct
_D3DKMDDIARG_ENUMVIDEOPRESENTTARGETSET { OUT
D3DKMDDI_VIDEO_PRESENT_TARGET_SET* pVideoPresentTargetSet; }
D3DKMDDIARG_ENUMVIDEOPRESENTTARGETSET;
[0391] EnumVideoPresentTargetSet can be called for each display
adapter in the system by the VidPN manager instance that is driving
the post-rendering video presentational capabilities of the
respective display adapter in order to obtain a list of video
present targets that the specified display adapter has.
[0392] The miniport can allocate a large enough buffer in system
memory to contain the requested set of video present sources for
the specified display adapter using the AllocSysMemForOutParamCb
callback provided to it by the operating system via the
INTERFACESPECIFICDATA interface. The size of the allocation should
be
sizeof(D3DKMDDI_VIDEO_PRESENT_TARGET_SET)+sizeof(D3DKMDDI_VIDEO_PRESENT_T-
ARGET)*(# of video present targets-1).
[0393] Once the memory for the output parameter has been allocated,
the miniport can populate it based on the definitions below:
TABLE-US-00058 typedef struct _D3DKMDDI_VIDEO_PRESENT_TARGET_SET {
SIZE_T NumOfVideoPresent- Targets; D3DKMDDI_VIDEO_PRESENT_SOURCE
VideoPresent- Targets[1]; } D3DKMDDI_VIDEO_PRESENT_TARGET_SET;
where: [0394] NumOfVideoPresentTargets--Number of video present
targets listed in VideoPresentSources. [0395]
VideoPresentSources--Address of the array of video present target
descriptors in the set. Actual number of elements is specified in
NumOfVideoPresentTargets.
[0396] With the video present target descriptor defined as
follows:
TABLE-US-00059 typedef struct _D3DKMDDI_VIDEO_PRESENT_TARGET {
D3DKMDDI_VIDEO_PRESENT_TARGET_ID VideoPresentTargetID;
D3DKMDDI_VIDEO_OUTPUT_TECHNOLOGY VideoOutputTechnology;
D3DKMDDI_VIDEO_OUTPUT_HPD_AWARENESS VideoOutputHPDAwareness;
D3DKMDDI_MONITOR_ORIENTATION_AWARENESS MonitorOrientationAwareness;
} D3DKMDDI_VIDEO_PRESENT_TARGET;
where: [0397] VideoPresentTargetID--Unique ID used to reference the
respective video present target by the miniport and the operating
system. [0398] VideoOutputTechnology--Type of the video output
technology. [0399] VideoOutputHPDAwareness--Type of the video
output's HPD awareness. [0400] MonitorOrientationAwareness--Monitor
orientation awareness. With the video present target ID defined
as:
[0401] typedefUINT D3DKMDDI_VIDEO_PRESENT_TARGET_ID;
The video output technology type descriptor can be defined as:
TABLE-US-00060 typedef enum _D3DKMDDI_VIDEO_OUTPUT_TECHNOLOGY {
D3DKMDDI_VOT_UNINITIALIZED = 0, D3DKMDDI_VOT_HD15 = 1,
D3DKMDDI_VOT_DVI = 2, D3DKMDDI_VOT_HDMI = 3, D3DKMDDI_VOT_HDMI2 =
4, D3DKMDDI_VOT_SVIDEO_4PIN = 5, D3DKMDDI_VOT_SVIDEO_7PIN = 6,
D3DKMDDI_VOT_RCA_COMPOSITE = 7, D3DKMDDI_VOT_RCA_3COMPONENT = 8,
D3DKMDDI_VOT_BNC = 9, D3DKMDDI_VOT_RF = 10, D3DKMDDI_VOT_OTHER =
255 } D3DKMDDI_VIDEO_OUTPUT_TECHNOLOGY;
The video output HPD awareness descriptor type can be defined
as:
TABLE-US-00061 typedef enum _D3DKMDDI_VIDEO_OUTPUT_HPD_AWARENESS {
D3DKMDDI_VOHPDA_UNINITIALIZED = 0, D3DKMDDI_VOHPDA_NONE = 1,
D3DKMDDI_VOHPDA_DESTRUCTIVELYPOLLED = 2,
D3DKMDDI_VOHPDA_NONDESTRUCTIVELYPOLLED = 3,
D3DKMDDI_VOHPDA_INTERRUPTIBLE = 4 }
D3DKMDDI_VIDEO_OUTPUT_HPD_AWARENESS;
[0402] Video output HPD awareness can be used to represent the
level of monitor connectivity sensed by a display adapter on its
video output, and with the following four types available: [0403]
1. Interruptible HPD--awareness if and only if the miniport can
asynchronously notify the operating system about monitor
arrivals/departures. [0404] 2. Non-Destructively Polled
HPD--awareness if and only if the miniport can not asynchronously
notify the operating system about monitor arrivals/departures, but
the operating system can periodically poll for the presence of a
monitor without causing visual artifacts. [0405] 3. Destructively
Polled HPD--awareness if and only if the miniport can not
asynchronously notify the operating system about monitor
arrivals/departures, but the operating system can sporadically poll
for presence of a monitor, causing visual artifacts on each poll.
[0406] 4. No HPD--awareness if and only if the miniport is not
aware of monitor arrivals/departures either through interrupts or
polling. Monitor orientation awareness can be defined as:
TABLE-US-00062 [0406] typedef enum
_D3DKMDDI_MONITOR_ORIENTATION_AWARENESS {
D3DKMDDI_MOA_UNINITIALIZED = 0, D3DKMDDI_MOA_NONE = 1,
D3DKMDDI_MPA_POLLED = 2, D3DKMDDI_MOA_INTERRUPTIBLE = 3 }
D3DKMDDI_MONITOR_ORIENTATION_AWARENESS;
[0407] On successful return from this function, the operating
system can take ownership of the lifetime of the data returned in
the output parameter and can deallocate the memory taken by its
supporting allocation when it is done with it.
Return Codes
[0408] STATUS_SUCCESS indicates that the driver handled the call
successfully.
TABLE-US-00063 TABLE 52 Function IsSupportedVidPN typedef NTSTATUS
(APIENTRY *PFND3DKMDDI_ISSUPPORTEDVIDPN) (IN HANDLE hAdapter, IN
OUT D3DKMDDIARG_ISSUPPORTEDVIDPN* pIsSupportedVidPNArg); typedef
struct _D3DKMDDIARG_ISSUPPORTEDVIDPN { IN OUT D3DKMDDI_VIDPN*
pDesiredVidPN; OUT BOOLEAN* pbIsVidPNSupported; }
D3DKMDDIARG_ISSUPPORTEDVIDPN;
[0409] IsSupportedVidPN can allow the operating system to ask the
miniport whether the provided VidPN configuration is supported
(e.g., can be extended to a functional
[0410] VidPN). The first argument, hAdapter, can specify the
display adapter on which the VidPN support is in question. The
actual VidPN can be specified in the first field of the second
argument, pIsSupportedVidPNArg->pDesiredVidPN, where the VidPN
descriptor can be defined as:
TABLE-US-00064 typedef struct _D3DKMDDI_VIDPN {
D3DKMDDI_VIDPN_TOPOLOGY VidPNTopology; DWORD dwReserved; }
D3DKMDDI_VIDPN;
The VidPN topology descriptor can be defined as:
TABLE-US-00065 typedef struct _D3DKMDDI_VIDPN_TOPOLOGY {
D3DKMDDI_VIDPN_PRESENT_PATH_SET VidPNPresentPathSet; }
D3DKMDDI_VIDPN_TOPOLOGY;
VidPNPresentPathSet can represent the set of video present paths
constituting the VidPN's topology, where:
TABLE-US-00066 typedef struct _D3DKMDDI_VIDPN_PRESENT_PATH_SET {
SIZE_T NumOfVidPNPresent- Paths; D3DKMDDI_VIDPN_PRESENT_PATH
VidPNPresentPaths[1]; } D3DKMDDI_VIDPN_PRESENT_PATH_SET;
with: [0411] 1. NumOfVidPNPresentPaths containing the number of
video present paths in VidPNPresentPaths, and [0412] 2.
VidPNPresentPaths containing an array of video present paths
constituting the VidPN's topology. The VidPN present path
descriptor can be defined as:
TABLE-US-00067 [0412] typedef struct _D3DKMDDI_VIDPN_PRESENT_PATH {
D3DKMDDI_VIDPN_SOURCE VidPNSource; D3DKMDDI_VIDPN_TARGET
VidPNTarget; D3DKMDDI_VIDPN_PRESENT_PATH_TRANSFORMATION
VidPNPresentPathTransformation; } D3DKMDDI_VIDPN_PRESENT_PATH;
[0413] D3DKMDDI_VIDPN_PRESENT_PATH is the video present path
descriptor that can be used to describe a mapping from a single
video present target to a single video present source in a VidPN
topology, with: [0414] VidPNSource is the video present path's
source descriptor. [0415] VidPNTarget is the video present path's
target descriptor. [0416] VidPNPresentPathTransformation is the
video present path's content transformation descriptor. where the
VidPN source descriptor can be defined as:
TABLE-US-00068 [0416] typedef struct _D3DKMDDI_VIDPN_SOURCE {
D3DKMDDI_VIDEO_PRESENT_SOURCE_ID VidPNSourceID; SIZE_T
PinnedModeIndex; D3DKMDDI_VIDPN_SOURCE_MODESET*
pCofuncVidPNSourceModeSet; } D3DKMDDI_VIDPN_SOURCE;
with: [0417] VidPNSourceID is the unique ID used to reference the
respective video present source by the miniport and the operating
system. This value comes from the EnumVideoPresentSourceSet call.
[0418] PinnedModeIndex is the index of the video present source
mode that is pinned in the co-functional set of modes available on
this video present source given the current VidPN configuration, or
D3DKMDDI_NO_PINNED_MODE if no mode is pinned on this source. [0419]
pCofuncVidPNSourceModeSet is the VidPN source modes co-functional
with the current (partial or provisional) VidPN this source is a
member of. The VidPN source mode set descriptor can be defined
as:
TABLE-US-00069 [0419] typedef struct _D3DKMDDI_VIDPN_SOURCE_MODESET
{ SIZE_T NumOfVidPNSource- Modes; D3DKMDDI_VIDPN_SOURCE_MODE
VidPNSourceModes[1]; } D3DKMDDI_VIDPN_SOURCE_MODESET;
with: [0420] NumOfVidPNSourceModes specifying the number of video
present source modes listed in VidPNSourceModes. [0421]
VidPNSourceModes containing the array of video present source modes
in the set. The VidPN source mode descriptor can be defined as:
TABLE-US-00070 [0421] typedef struct _D3DKMDDI_VIDPN_SOURCE_MODE {
D3DKMDDI_VIDPN_SOURCE_MODE_TYPE Type; union {
D3DKMDDI_GRAPHICS_RENDERING_FORMAT grfxFormat;
D3DKMDDI_TEXT_RENDERING_FORMAT textFormat; }; }
D3DKMDDI_VIDPN_SOURCE_MODE;
with Type containing the VidPN source mode type descriptor, defined
as:
TABLE-US-00071 typedef enum _D3DKMDDI_VIDPN_SOURCE_MODE_TYPE {
D3DKMDDI_RMT_UNINITIALIZED = 0, D3DKMDDI_RMT_GRAPHICS = 1,
D3DKMDDI_RMT_TEXT = 2 } D3DKMDDI_VIDPN_SOURCE_MODE_TYPE;
[0422] If Type equals D3DKMDDI_RMT_GRAPHICS, then the source mode
descriptor contains a graphics rendering format descriptor,
grfxFormat, defined as:
TABLE-US-00072 typedef struct _D3DKMDDI_GRAPHICS_RENDERING_FORMAT {
SIZE sizePrimSurf; SIZE sizeVisible; DWORD dwStride;
D3DKMDDI_PIXEL_FORMAT PixelFormat; D3DKMDDI_COLOR_ACCESS_MODE
PixelValueAccessMode; } D3DKMDDI_GRAPHICS_RENDERING_FORMAT;
with: [0423] sizePrimSurf specifying the size of the primary
surface required for this VidPN source mode. [0424] sizeVisible
specifying the size of the visible part of the primary surface,
used for panned modes including zoom modes. [0425] dwStride
specifying the number of bytes between the start of one scan line
and the next. [0426] PixelFormat specifying the pixel format.
[0427] PixelValueAccessMode specifying access mode for the pixel
value information.
[0428] Otherwise, if Type equals D3DKMDDI_RMT_TEXT, then the source
mode descriptor contains a text rendering format descriptor,
textFormat, defined as:
TABLE-US-00073 typedef enum _D3DKMDDI_TEXT_RENDERING_FORMAT {
D3DKMDDI_TRF_UNINITIALIZED = 0 }
D3DKMDDI_TEXT_RENDERING_FORMAT;
Furthermore, the VidPN target descriptor can be defined as:
TABLE-US-00074 typedef struct _D3DKMDDI_VIDPN_TARGET {
D3DKMDDI_VIDEO_PRESENT_TARGET_ID VidPNTargetID; SIZE_T
PinnedModeIndex; D3DKMDDI_VIDPN_TARGET_MODESET*
pCofuncVidPNTargetModeSet; } D3DKMDDI_VIDPN_TARGET;
with: [0429] VidPNTargetID is the unique ID used to reference the
respective video present target by the miniport and the operating
system. This value comes from the EnumVideoPresentTargetSet call.
[0430] PinnedModeIndex is the index of the video present target
mode that is pinned in the co-functional set of modes available on
this video present target given the current VidPN configuration, or
D3DKMDDI_NO_PINNED_MODE if no mode is pinned on this target. [0431]
pCofuncVidPNSourceModeSet is the VidPN target modes co-functional
with the current (partial) VidPN this target is a member of. The
VidPN target mode set descriptor can be defined as:
TABLE-US-00075 [0431] typedef struct _D3DKMDDI_VIDPN_TARGET_MODESET
{ SIZE_T NumOfVidPNTargetModes; D3DKMDDI_VIDPN_TARGET_MODE
VidPNTargetModes[1]; } D3DKMDDI_VIDPN_TARGET_MODESET;
with: [0432] NumOfVidPNTargetModes specifying the number of video
present target modes listed in VidPNTargetModes. [0433]
VidPNTargetModes containing the array of video present target modes
in the set. where the VidPN target mode descriptor can be defined
as shown in Table 53:
TABLE-US-00076 [0433] TABLE 53 VidPN target mode descriptor typedef
struct _D3DKMDDI_VIDPN_TARGET_MODE { D3DKMDDI_VIDEO_SIGNAL_STANDARD
vidStandard; SIZE sizeTotal; SIZE sizeActive; SIZE
sizeActiveOffset; SIZE sizeTLDeltaVisibleFromActive; SIZE
sizeBRDeltaVisibleFromActive; D3DKMDDI_FRACTIONAL_FREQUENCY
frqVSync; D3DKMDDI_FRACTIONAL_FREQUENCY frqHSync; SIZE_T
sztPixelRate; D3DKMDDI_VIDEO_SIGNAL_SCANLINE_ORDERING
ScanLineOrdering; D3DKMDDI_GTFCOMPLIANCE IsGTFCompliant;
D3DKMDDI_MODE_PREFERENCE ModePreference; }
D3DKMDDI_VIDPN_TARGET_MODE; typedef enum
_D3DKMDDI_VIDEO_SIGNAL_STANDARD { // W .times. H{i|p} @ ( VR / HR /
CR ) D3DKMDDI_VMS_UNINITIALIZED = 0, D3DKMDDI_VMS_GTF = 1,
D3DKMDDI_VMS_NTSC_M = 2, // 720 .times. 525i @ (59.94 [Hz] /
15,734.27[Hz] / 3,579,545 [Hz]) D3DKMDDI_VMS_NTSC_J = 3, // 720
.times. 525i @ (59.94 [Hz] / 15,734.27[Hz] / 3,579,545 [Hz])
D3DKMDDI_VMS_NTSC_443 = 4, // 720 .times. 525i @ (59.94 [Hz] /
15,734.27[Hz] / 4,433,618.75[Hz]) D3DKMDDI_VMS_PAL_B = 5, // 720
.times. 625i @ (50 [Hz] / 15,625 [Hz] / 4,433,618.75[Hz])
D3DKMDDI_VMS_PAL_B1 = 6, // 720 .times. 625i @ (50 [Hz] / 15,625
[Hz] / 4,433,618.75[Hz]) D3DKMDDI_VMS_PAL_G = 7, // 720 .times.
625i @ (50 [Hz] / 15,625 [Hz] / 4,433,618.75[Hz])
D3DKMDDI_VMS_PAL_H = 8, // 720 .times. 625i @ (50 [Hz] / 15,625
[Hz] / 4,433,618.75[Hz]) D3DKMDDI_VMS_PAL_I = 9, // 720 .times.
625i @ (50 [Hz] / 15,625 [Hz] / 4,433,618.75[Hz])
D3DKMDDI_VMS_PAL_D = 10, // 720 .times. 525i @ (59.94 [Hz] / 15,734
[Hz] / 3,575,611.49[Hz]) D3DKMDDI_VMS_PAL_N = 11, // 720 .times.
625i @ (50 [Hz] / 15,625 [Hz] / 4,433,618.75[Hz])
D3DKMDDI_VMS_PAL_NC = 12, // 720 .times. 625i @ (50 [Hz] / 15,625
[Hz] / 3,582,056.25[Hz]) D3DKMDDI_VMS_SECAM_B = 13, // 720 .times.
625i @ (50 [Hz] / 15,625 [Hz] / [Hz]) D3DKMDDI_VMS_SECAM_D = 14, //
720 .times. 625i @ (50 [Hz] / 15,625 [Hz] / [Hz])
D3DKMDDI_VMS_SECAM_G = 15, // 720 .times. 625i @ (50 [Hz] / 15,625
[Hz] / [Hz]) D3DKMDDI_VMS_SECAM_H = 16, // 720 .times. 625i @ (50
[Hz] / 15,625 [Hz] / [Hz]) D3DKMDDI_VMS_SECAM_K = 17, // 720
.times. 625i @ (50 [Hz] / 15,625 [Hz] / [Hz]) D3DKMDDI_VMS_SECAM_K1
= 18, // 720 .times. 625i @ (50 [Hz] / 15,625 [Hz] / [Hz])
D3DKMDDI_VMS_SECAM_L = 19, // 720 .times. 625i @ (50 [Hz] / 15,625
[Hz] / [Hz]) D3DKMDDI_VMS_SECAM_L1 = 20, // 720 .times. 625i @ (50
[Hz] / 15,625 [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_1 = 21, // 720
.times. 480i @ (59.94 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_2 =
22, // 720 .times. 480i @ (60 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_EIA_861_3 = 23, // 640 .times. 480p @ (59.94 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_4 = 24, // 640 .times. 480p @ (60
[Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_5 = 25, // 720 .times.
480p @ (59.94 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_6 = 26, //
720 .times. 480p @ (60 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_7 =
27, // 1280 .times. 720p @ (59.94 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_EIA_861_8 = 28, // 1280 .times. 720p @ (60 [Hz] / [Hz]
/ [Hz]) D3DKMDDI_VMS_EIA_861_9 = 29, // 1920 .times. 1080i @ (59.94
[Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861_10 = 30, // 1920 .times.
1080i @ (60 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861A_1 = 31, //
720 .times. 576i @ (50 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861A_2
= 32, // 720 .times. 576p @ (50 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_EIA_861A_3 = 33, // 1280 .times. 720p @ (50 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_EIA_861A_4 = 34, // 1920 .times. 1080i @
(50 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861B_1 = 35, // 1920
.times. 1080p @ (23.960 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861B_2
= 36, // 1920 .times. 1080p @ (24 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_EIA_861B_3 = 37, // 1920 .times. 1080p @ (25 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_EIA_861B_4 = 38, // 1920 .times. 1080p @
(29.970 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861B_5 = 39, // 1920
.times. 1080p @ (30 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_EIA_861B_6 =
40, // 1920 .times. 1080p @ (50 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_EIA_861B_7 = 41, // 1920 .times. 1080p @ (60 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_IBM_1 = 42, // 720 .times. 400p @ (70
[Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_IBM_2 = 43, // 720 .times. 400p @
(88 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_IBM_3 = 44, // 640 .times.
480p @ (60 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_IBM_4 = 45, // 1024
.times. 768i @ (87 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_APPLE_1 = 46,
// 640 .times. 480p @ (67 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_APPLE_2
= 47, // 832 .times. 624p @ (75 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_APPLE_3 = 48, // 1152 .times. 870p @ (75 [Hz] / [Hz] /
[Hz]) D3DKMDDI_VMS_VESA_1 = 49, // 640 .times. 480p @ (72 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_VESA_2 = 50, // 640 .times. 480p @ (75
[Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VESA_3 = 51, // 800 .times. 600p @
(56 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VESA_4 = 52, // 800 .times.
600p @ (60 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VESA_5 = 53, // 800
.times. 600p @ (72 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VESA_6 = 54, //
800 .times. 600p @ (75 [Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VESA_7 =
55, // 1024 .times. 768p @ (60 [Hz] / [Hz] / [Hz])
D3DKMDDI_VMS_VESA_8 = 56, // 1024 .times. 768p @ (70 [Hz] / [Hz] /
[Hz]) D3DKMDDI_VMS_VESA_9 = 57, // 1024 .times. 768p @ (75 [Hz] /
[Hz] / [Hz]) D3DKMDDI_VMS_VESA_10 = 58, // 1280 .times. 1024p @ (75
[Hz] / [Hz] / [Hz]) D3DKMDDI_VMS_VDMT_1 = 59, // 640 .times. 350p @
(85 [Hz] / 37,900 [Hz] / 31,500,000 [Hz]) D3DKMDDI_VMS_VDMT_2 = 60,
// 640 .times. 400p @ (85 [Hz] / 37,900 [Hz] / 31,500,000 [Hz])
D3DKMDDI_VMS_VDMT_3 = 61, // 720 .times. 400p @ (85 [Hz] / 37,900
[Hz] / 35,500,000 [Hz]) D3DKMDDI_VMS_VDMT_4 = 62, // 640 .times.
480p @ (60 [Hz] / 31,500 [Hz] / 25,175,000 [Hz])
D3DKMDDI_VMS_VDMT_5 = 63, // 640 .times. 480p @ (72 [Hz] / 37,900
[Hz] / 31,500,000 [Hz]) D3DKMDDI_VMS_VDMT_6 = 64, // 640 .times.
480p @ (75 [Hz] / 37,500 [Hz] / 31,500,000 [Hz])
D3DKMDDI_VMS_VDMT_7 = 65, // 640 .times. 480p @ (85 [Hz] / 43,300
[Hz] / 36,000,000 [Hz]) D3DKMDDI_VMS_VDMT_8 = 66, // 800 .times.
600p @ (56 [Hz] / 35,100 [Hz] / 36,000,000 [Hz])
D3DKMDDI_VMS_VDMT_9 = 67, // 800 .times. 600p @ (60.317 [Hz] /
37,879 [Hz] / 40,000,000 [Hz]) D3DKMDDI_VMS_VDMT_10 = 68, // 800
.times. 600p @ (72 [Hz] / 48,100 [Hz] / 50,000,000 [Hz])
D3DKMDDI_VMS_VDMT_11 = 69, // 800 .times. 600p @ (75 [Hz] / 46,900
[Hz] / 49,500,000 [Hz]) D3DKMDDI_VMS_VDMT_12 = 70, // 800 .times.
600p @ (85 [Hz] / 53,700 [Hz] / 56,250,000 [Hz])
D3DKMDDI_VMS_VDMT_13 = 71, // 1024 .times. 768i @ (43 [Hz] / 35,500
[Hz] / 44,900,000 [Hz]) D3DKMDDI_VMS_VDMT_14 = 72, // 1024 .times.
768p @ (60.004 [Hz] / 48,363 [Hz] / 65,000,000 [Hz])
D3DKMDDI_VMS_VDMT_15 = 73, // 1024 .times. 768p @ (70 [Hz] / 56,500
[Hz] / 75,000,000 [Hz]) D3DKMDDI_VMS_VDMT_16 = 74, // 1024 .times.
768p @ (75 [Hz] / 60,000 [Hz] / 78,750,000 [Hz])
D3DKMDDI_VMS_VDMT_17 = 75, // 1024 .times. 768p @ (85 [Hz] / 68,700
[Hz] / 94,500,000 [Hz]) D3DKMDDI_VMS_VDMT_18 = 76, // 1152 .times.
864p @ (75 [Hz] / 67,500 [Hz] / 108,000,000 [Hz])
D3DKMDDI_VMS_VDMT_19 = 77, // 1280 .times. 960p @ (60 [Hz] / 60,000
[Hz] / 108,000,000 [Hz]) D3DKMDDI_VMS_VDMT_20 = 78, // 1280 .times.
960p @ (85 [Hz] / 85,900 [Hz] / 148,500,000 [Hz])
D3DKMDDI_VMS_VDMT_21 = 79, // 1280 .times. 1024p @ (60 [Hz] /
64,000 [Hz] / 108,000,000 [Hz]) D3DKMDDI_VMS_VDMT_22 = 80, // 1280
.times. 1024p @ (75 [Hz] / 80,000 [Hz] / 135,000,000 [Hz])
D3DKMDDI_VMS_VDMT_23 = 81, // 1280 .times. 1024p @ (85 [Hz] /
91,100 [Hz] / 157,500,000 [Hz]) D3DKMDDI_VMS_VDMT_24 = 82, // 1600
.times. 1200p @ (60 [Hz] / 75,000 [Hz] / 162,000,000 [Hz])
D3DKMDDI_VMS_VDMT_25 = 83, // 1600 .times. 1200p @ (65 [Hz] /
81,300 [Hz] / 175,500,000 [Hz]) D3DKMDDI_VMS_VDMT_26 = 84, // 1600
.times. 1200p @ (70 [Hz] / 87,500 [Hz] / 189,000,000 [Hz])
D3DKMDDI_VMS_VDMT_27 = 85, // 1600 .times. 1200p @ (75 [Hz] /
93,800 [Hz] / 202,500,000 [Hz]) D3DKMDDI_VMS_VDMT_28 = 86, // 1600
.times. 1200p @ (85 [Hz] / 106,300 [Hz] / 229,500,000 [Hz])
D3DKMDDI_VMS_VDMT_29 = 87, // 1792 .times. 1344p @ (60 [Hz] /
83,640 [Hz] / 204,750,000 [Hz]) D3DKMDDI_VMS_VDMT_30 = 88, // 1792
.times. 1344p @ (75 [Hz] / 106,270 [Hz] / 261,750,000 [Hz])
D3DKMDDI_VMS_VDMT_31 = 89, // 1856 .times. 1392p @ (60 [Hz] /
86,330 [Hz] / 218,250,000 [Hz]) D3DKMDDI_VMS_VDMT_32 = 90, // 1856
.times. 1392p @ (75 [Hz] / 112,500 [Hz] / 288,000,000 [Hz])
D3DKMDDI_VMS_VDMT_33 = 91, // 1920 .times. 1440p @ (60 [Hz] /
90,000 [Hz] / 234,000,000 [Hz]) D3DKMDDI_VMS_VDMT_34 = 92, // 1920
.times. 1440p @ (75 [Hz] / 112,500 [Hz] / 297,000,000 [Hz])
D3DKMDDI_VMS_OTHER = 255 } D3DKMDDI_VIDEO_SIGNAL_STANDARD; typedef
enum _D3DKMDDI_GTFCOMPLIANCE { D3DKMDDI_GTF_UNINITIALIZED = 0,
D3DKMDDI_GTF_COMPLIANT = 1, D3DKMDDI_GTF_NOTCOMPLIANT = 2 }
D3DKMDDI_GTFCOMPLIANCE; typedef enum _D3DKMDDI_MODE_PREFERENCE {
D3DKMDDI_MP_UNINITIALIZED = 0, D3DKMDDI_MP_PREFERRED = 1,
D3DKMDDI_MP_NOTPREFERRED = 2 } D3DKMDDI_MODE_PREFERENCE;
with: [0434] vidStandard specifying the video mode standard this
mode is defined by (if any). [0435] sizeTotal specifying video
signal's size in pixels (e.g., HTotal & VTotal). [0436]
sizeActive specifying the presented image's size in active pixels
(e.g., HActive & VActive). [0437] sizeActiveOffset specifying
the position of the active pixels with respect to the total pixels.
[0438] sizeTLDeltaVisibleFromActive specifying monitor screen's
delta of visible pixels' top-left corner from video signal's active
pixels bottom-right corner. [0439] sizeBRDeltaVisibleFromActive
specifying monitor screen's delta of visible pixels' bottom-right
corner from video signal's active pixels bottom-right corner.
[0440] frqVSync specifying this mode's vertical refresh frequency
(in Hz). [0441] frqHSync specifying this mode's horizontal refresh
frequency (in KHz). [0442] sztPixelRate specifying this mode's
pixel clock rate. [0443] ScanLineOrdering specifying this mode's
scan line ordering (e.g., progressive, interlaced). [0444]
IsGTFCompliant specifying whether this mode's VSync, HS ync, and
clock rate comply with the restrictions imposed by the VESA
Generalized Timing Formula. [0445] ModePreference specifying
whether this mode is preferred by the monitor connected to the
respective video output.
[0446] The video signal standard enum can be used to simplify video
mode comparisons when appropriate.
[0447] The fractional frequency descriptor can be defined as:
TABLE-US-00077 typedef struct _D3DKMDDI_FRACTIONAL_FREQUENCY {
SIZE_T Numerator; SIZE_T sztDenominator; }
D3DKMDDI_FRACTIONAL_FREQUENCY;
with: [0448] Numerator specifying the fractional frequency
numerator. [0449] Denominator specifying the fractional frequency
denominator.
[0450] Vertical frequencies can be stored in Hz and horizontal
frequencies can be stored in KHz. The dynamic range of this
encoding format, given 10 -7 resolution (on 32-bit systems) is
{0..(2 32-1)/10 7}, which translates to {0..428.4967296} [Hz] for
vertical frequencies and 10.428.49672961 [KHz] for horizontal
frequencies. This sub-microseconds precision range should be
acceptable even for a pro-video application (error in one
microsecond for video signal synchronization would imply a time
drift with a cycle of 10 7/(60*60*24)=115.741 days.
[0451] The video signal scan-line ordering descriptor can be
defined as:
TABLE-US-00078 typedef enum
_D3DKMDDI_VIDEO_SIGNAL_SCANLINE_ORDERING {
D3DKMDDI_VSSLO_UNINITIALIZED = 0, D3DKMDDI_VSSLO_PROGRESSIVE = 1,
D3DKMDDI_VSSLO_INTERLACED_UPPERFIELDFIRST = 2,
D3DKMDDI_VSSLO_INTERLACED_LOWERFIELDFIRST = 3, D3DKMDDI_VSSLO_OTHER
= 255 } D3DKMDDI_VIDEO_SIGNAL_SCANLINE_ORDERING;
and can be used specify whether each field contains the entire
content of a frame or only half of it (e.g., even/odd lines
interchangeably). Specifying this characteristic explicitly with an
enum can both free up the client from having to maintain mode-based
look-up tables and be extensible for future standard modes not
listed in the D3DKMDDI_VIDEO_SIGNAL_STANDARD enum.
[0452] Storing deltas for visible/active pixels mapping rather than
visible pixels' size & offset has the added benefit of
ideal/default state being zeros.
[0453] The VidPN present path transformation descriptor can be
defined as:
TABLE-US-00079 typedef enum
_D3DKMDDI_VIDPN_PRESENT_PATH_TRANSFORMATION {
D3DKMDDI_VPPT_IDENTITY = 1, D3DKMDDI_VPPT_CENTERED = 2 }
D3DKMDDI_VIDPN_PRESENT_PATH_TRANSFORMATION;
with: [0454] D3DKMDDI_VPPT_IDENTITY representing source content
presented as-is. Note that this transformation is available if and
only if the video present source and target modes' spatial
resolutions match. [0455] D3DKMDDI_VPPT_CENTERED representing
source content presented unscaled, centered with respect to the
target mode's spatial resolution.
[0456] A specified VidPN should at a minimum specify a valid
topology, but can also have some or all of its targets/sources
configured with respectively pinned modes.
Return Codes
[0457] STATUS_SUCCESS indicates that the driver handled the call
successfully. STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY indicates that
the specified VidPN topology is invalid.
TABLE-US-00080 TABLE 54 Function EnumCofuncVidPNSourceIDSet typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_ENUMCOFUNCVIDPNSOURCEIDSET) (IN
HANDLE hAdapter, IN OUT D3DKMDDIARG_ENUMCOFUNCVIDPNSOURCEIDSET*
pEnumCofuncVidPNSourceIDSetArg); typedef struct
_D3DKMDDIARG_ENUMCOFUNCVIDPNSOURCEIDSET { IN D3DKMDDI_VIDPN*
pConstrainingVidPN; OUT D3DKMDDI_VIDEO_PRESENT_SOURCE_ID_SET*
pCofuncVidPNSourceIDSet; }
D3DKMDDIARG_ENUMCOFUNCVIDPNSOURCEIDSET;
[0458] EnumCofuncVidPNSourceIDSet enumerates a set of VidPN source
IDs confunctional with the specified VidPN implementation. A VidPN
source can be cofunctional with a given VidPN implementation if an
only if it can be added to its topology via at least one video
present path without rendering that VidPN implementation invalid or
unsupported. The miniport can allocate a large enough buffer
pointed to by pEnumCofuncVidPNSourceIDSetArg to accommodate the
entire enumeration result using
D3DKMDDI_INTERFACESPECIFICDATA.pfnAllocSysMemFor OutParamCb. The
size of the allocation should be
sizeof(D3DKMDDI_VIDEO_PRESENT_SOURCE_ID_SET)+sizeof(D3DKMDDI_VIDEO_PRESEN-
T_SOURCE_ID)*(# of cofunctional video present sources-1).
[0459] Once the memory for the output parameter has been allocated,
the miniport can populate it based on the definitions below:
TABLE-US-00081 typedef struct _D3DKMDDI_VIDEO_PRESENT_SOURCE_ID_SET
{ SIZE_T NumOfVidPNSourceIDs; D3DKMDDI_VIDEO_PRESENT_SOURCE_ID
VideoPresentSourceIDs[1]; }
D3DKMDDI_VIDEO_PRESENT_SOURCE_ID_SET;
with: [0460] NumOfVidPNSourceIDs specifying the number of video
present sources' IDs listed in VideoPresentSourceIDs. [0461]
VideoPresentSourceIDs representing the array of video present
sources' IDs in the set.
[0462] On successful return from this function, the operating
system can take ownership of the lifetime of the data returned in
the output parameter and can deallocate the memory taken by its
supporting allocation when it is done with it.
Return Codes
[0463] STATUS_SUCCESS indicates that the driver handled the call
successfully. STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY indicates that
the specified VidPN topology is invalid. STATUS_NO_MEMORY indicate
that miniport could not allocate a buffer to fit in the requested
enumeration.
TABLE-US-00082 TABLE 55 Function EnumCofuncVidPNTargetIDSet typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_ENUMCOFUNCVIDPNTARGETIDSET) (IN
HANDLE hAdapter, IN OUT D3DKMDDIARG_ENUMCOFUNCVIDPNTARGETIDSET*
pEnumCofuncVidPNTargetIDSetArg); typedef struct
_D3DKMDDIARG_ENUMCOFUNCVIDPNSOURCEIDSET { IN D3DKMDDI_VIDPN*
pConstrainingVidPN; OUT D3DKMDDI_VIDEO_PRESENT_TARGET_ID_SET*
pCofuncVidPNTargetIDSet; }
D3DKMDDIARG_ENUMCOFUNCVIDPNTARGETIDSET;
[0464] EnumCofuncVidPNTargetIDSet enumerates a set of VidPN target
IDs confunctional with the specified VidPN implementation. A VidPN
target can be cofunctional with a given VidPN implementation if and
only if it can be added to its topology via at least one video
present path without rendering that VidPN implementation invalid or
unsupported. The miniport can allocate a large enough buffer
pointed to by pEnumCofuncVidPNTargetIDSetArg to accommodate the
entire enumeration result using
D3DKMDDI_INTERFACESPECIFICDATA.pfnAllocSysMemFor OutParamCb. The
size of the allocation should be
sizeof(D3DKMDDI_VIDEO_PRESENT_TARGET_ID_SET)+sizeof(D3DKMDDI_VIDEO_PRESEN-
T_TARGET_ID)*(# of cofunctional video present targets-1).
[0465] Once the memory for the output parameter has been allocated,
the miniport can populate it based on the definitions below:
TABLE-US-00083 typedef struct _D3DKMDDI_VIDEO_PRESENT_TARGET_ID_SET
{ SIZE_T NumOfVidPNTargetIDs; D3DKMDDI_VIDEO_PRESENT_TARGET_ID
VideoPresentTargetIDs[1]; }
D3DKMDDI_VIDEO_PRESENT_TARGET_ID_SET;
with: [0466] NumOfVidPNTargetIDs specifying the number of video
present targets' IDs listed in VideoPresentTargetIDs. [0467]
VideoPresentSourceIDs representing the array of video present
targets' IDs in the set.
[0468] On successful return from this function, the operating
system can take ownership of the lifetime of the data returned in
the output parameter and can deallocate the memory taken by its
supporting allocation when it is done with it.
Return Codes
[0469] STATUS_SUCCESS indicates that the driver handled the call
successfully. STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY indicates that
the specified VidPN topology is invalid. STATUS_NO_MEMORY indicates
that the miniport could not allocate a buffer to fit in the
requested enumeration.
TABLE-US-00084 TABLE 56 Function EnumVidPNCofuncModality typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_ENUMVIDPNCOFUNCMODALITY) (IN HANDLE
hAdapter, IN OUT D3DKMDDIARG_ENUMVIDPNCOFUNCMODALITY*
pEnumVidPNCofuncModalityArg); typedef struct
_D3DKMDDIARG_ENUMVIDPNCOFUNCMODALITY { IN D3DKMDDI_VIDPN*
pConstrainingVidPN; OUT D3DKMDDI_VIDPN_PRESENT_PATH_SET*
pVidPNPresentPathSetWithCofuncModeSets; }
D3DKMDDIARG_ENUMVIDPNCOFUNCMODALITY;
[0470] EnumVidPNCofuncModality lets the operating system enumerate
cofunctional video present and target mode sets on each video
present path in the specified VidPN, where: [0471]
pConstrainingVidPN is the VidPN with respect to which cofunctional
mode sets on VidPN's targets and sources are being sought. [0472]
pVidPNPresentPathSetWithCofuncModeSets is the set of VidPN present
paths where each source/target is populated with mode sets
cofunctional to the constraining VidPN. If any sources/targets of
the constraining VidPN have modes pinned on them, their indices
should be properly updated in the respective VidPN source/target
descriptor in the result set.
[0473] The miniport should populate:
pVidPresentPath->VideoPresentSource.pCofuncVidPNSourceModeSet->VidP-
NSourceModes[1..n] and
pVidPresentPath->VideoPresentTarget.pCofuncVidPNTargetModeSet->VidP-
NTargetModes[1..m] where: D3DKMDDI_VIDPN_PRESENT_PATH*
pVidPresentPath=(*o_ppVidPNPresentPathSetWithCofuncModeSets)->arr_VidP-
resentPaths[1..k];
[0474] On successful return from this function, the operating
system can take ownership of the lifetime of the data returned in
the output parameter and can deallocate the memory taken by its
supporting allocation when it is done with it.
Return Codes
[0475] STATUS_SUCCESS indicates that the driver handled the call
successfully. STATUS_NO_MEMORY indicate that miniport could not
allocate a buffer to fit in the requested enumeration.
TABLE-US-00085 TABLE 57 Function RecommendFunctionalVidPN typedef
NTSTATUS (APIENTRY *PFND3DKMDDI_RECOMMENDFUNCTIONALVIDPN) (IN
HANDLE hAdapter, IN OUT D3DKMDDIARG_RECOMMENDFUNCTIONALVIDPN*
pRecommendFunctionalVidPNArg); typedef struct
_D3DKMDDIARG_RECOMMENDFUNCTIONALVIDPN { IN UINT NumberOfMonitors;
IN D3DKMDDI_VIDEO_PRESENT_TARGET_ID*
pVidPNTargetPrioritizationVector; OUT D3DKMDDI_VIDPN*
pRecommendedFunctionalVidPN; }
D3DKMDDIARG_RECOMMENDFUNCTIONALVIDPN;
[0476] RecommendFunctionalVidPN lets the operating system query for
a VidPN recommended by the miniport, given the current state of the
h/w. The operating system may use it in case it encounters a
configuration where no user preference (e.g., last-used modality)
has been specified. As part of this request, the operating system
specifies to the miniport a vector of VidPN targets IDs,
pVidPNTargetPrioritizationVector ordered most important first,
representing the relative importance of monitors connected to them.
In turn, the miniport should allocate sufficient memory to populate
the functional VidPN it wishes to recommend to the operating system
for the current state of the h/w, populate the respective fields,
and assign its address to pRecommendedFunctionalVidPN. On
successful return from this function, the operating system can take
ownership of the lifetime of the data returned in the output
parameter and can deallocate the memory taken by its supporting
allocation when it is done with it.
Return Codes
[0477] STATUS_SUCCESS indicates that the driver handled the call
successfully. STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN indicates that
miniport has no VidPN recommendation for the current configuration
of the display adapter. STATUS_NO_MEMORY indicates that the
miniport could not allocate a buffer to fit in the requested
enumeration.
Example 49
Exemplary Device-Specific Part of Video Rendering Device Driver
[0478] Any of the technologies described herein can be implemented
in the device-specific part of a video rendering device driver. A
reusable portion of the driver can be shared across video rendering
device drivers.
[0479] For example, in an implementation carried out in the
MICROSOFT.RTM. WINDOWS.RTM. operating system, the video port can
serve as the reusable portion of the driver, and a video miniport
can serve as the device-specific part of the video rendering device
driver.
Exemplary Advantages
[0480] Multi-monitor display mode management is a complex problem
that deals with capabilities of video rendering/presenting devices
(e.g., video cards also known as graphics adapters) and video
monitoring devices (e.g., monitors). A main issue causing
complexity in display mode management is an inherent
interdependency among capabilities of graphics display device
objects (e.g., MICROSOFT.RTM. WINDOWS.RTM. GDI objects), each
representing a separate (view, output) mapping on a single
multi-output video card, which is not dealt with well by the legacy
display mode management architecture.
[0481] These interdependencies arise primarily from: (1) possible
contention for video output codecs on systems having more video
outputs than codecs that can drive them; (2) the multitude of ways
to satisfy a request for establishment of any given multi-output
video presenting configuration within a given video card, largely
due to: (a) differences in capabilities of video output codecs
present in a video card; (b) a video card's ability to use video
output codecs with various video outputs through the use of
cross-bars that can route any video output codec to any compatible
video output; (c) a video card's ability to share video output
codecs for multiple video outputs in cases where video output
codecs are a scarce resource (e.g., less than the number of video
outputs to be driven); (d) a video card's ability to use multiple
video output codecs or a single multi-input video output codec for
a single video output (e.g., overlays), in cases where tampering
with one of the video streams cannot be tolerated or where a video
stream on which a secondary signal needs to be overlaid is already
in an analog format and decoding it just to add a digital overlay
and then remodulate it is wasteful; (3) contention for video memory
bus bandwidth by utilized video output codecs, each of which is
responsible for converting content of associated primary surface(s)
into a video signal on the respective video output interface, which
ultimately is reduced to periodic video memory reads; or (4)
contention for video memory capacity by the primary surfaces
required to support a given video present path (e.g., a logical
path from the rendered digital content to the physical video
interface output).
[0482] As such, above-mentioned interdependencies between available
display mode sets of (view, output) pairs are more intricate than
just on a (view, output) pair basis. Specifically, choosing to use
a given primary surface format on a view may affect what video
signal can be presented on the respective output. Also, when
considering scenarios where a single view is presented on multiple
outputs, the set of available video signals changes based on how
and which video output codecs are used to implement the resulting
present configuration. Finally, when considering scenarios where
multiple views are employed on a single video card (each
potentially presented to multiple outputs), available video signals
change based on association between the various views and the
outputs. That is, what video signals a video card can drive on its
outputs is a function of what types of primary surfaces it is asked
to present and in what fashion should they be presented (e.g., to
what outputs).
[0483] Furthermore, designs might not take into account the scaling
capability of contemporary video cards, which are able to up- or
down-sample a given primary surface content to a different spatial
resolution to be driven on the respective video output. As such,
two main abstractions that may be made with respect to multi-output
video cards are: (1) a simplified view of a multi-function display
device abstraction that includes both the video card and the
monitor, represented in a unified "display mode" descriptor
modality, which contains states of two distinct physical devices;
and (2) extension of a single-output mode enumeration to multiple
outputs, which can be achieved via duplication of independent video
driver stacks and respective graphics devices, one per (view,
output). These abstractions are not sufficient to properly drive
such devices and may be superseded with: (1) distinct modality
descriptors for views and outputs; (2) one video driver stack per
video card, which hosts a video miniport that exposes a
capability-balancing DDI that lets a client pin the modes it
desires and re-enumerate an updated set of available modes,
ultimately converging on a functional solution in a series of
iterations (e.g., graph search); and (3) augmentation of an
implementation to support display mode interdependencies, resulting
available mode set invalidations, and mode change failures.
Alternatives
[0484] The technologies from any example can be combined with the
technologies described in any one or more of the other examples. In
view of the many possible embodiments to which the principles of
the invention may be applied, it should be recognized that the
illustrated embodiments are examples of the invention and should
not be taken as a limitation on the scope of the invention. Rather,
the scope of the invention includes what is covered by the
following claims. We therefore claim as our invention all that
comes within the scope and spirit of these claims.
* * * * *