libavutil/hwcontext_qsv: add usage child_device_type argument to explicitly select d3d11va/DX11 device type

UPD: Rebase of last patch set over current master and use DX9 as default device type.

Makes selection of dxva2/DX9 device type by default as before with explicit d3d11va/DX11 usage to cover more HW configurations.
Added warning message to expect changing default device type in the future.

Fixes TGL / AV1 decode as requires DX11 with explicit DX11 type
selection.

Add headless/multi adapter support and fixes:
    https://trac.ffmpeg.org/ticket/7511
    https://trac.ffmpeg.org/ticket/6827
    http://ffmpeg.org/pipermail/ffmpeg-trac/2017-November/041901.html
    https://trac.ffmpeg.org/ticket/7933
    https://github.com/InitialForce/FFmpeg/commit/338fbcd5bba1de0e1b3e3bad8985eee2fdfbeca1
    https://github.com/jellyfin/jellyfin/issues/2626#issuecomment-602153952

Any other fixes are welcome including OpenCL interop patch since I don't have proper setup to validate this use case

Decoding, encoding, transcoding have been validated.

child_device_type option is responsible for d3d11va/dxva2 device selection

Usage examples:

DirectX 11:
    -init_hw_device qsv:hw,child_device_type=d3d11va
    -init_hw_device qsv:hw,child_device_type=d3d11va,child_device=0
OR
    -init_hw_device d3d11va=dx -init_hw_device qsv@dx

DirectX 9 is still supported but requires explicit selection:
    -init_hw_device qsv:hw,child_device_type=dxva2
OR
    -init_hw_device dxva2=dx -init_hw_device qsv@dx

Signed-off-by: Artem Galin <artem.galin@intel.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index c896aede3b..62d9703b7a 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -1104,6 +1104,9 @@ device type:
 @item dxva2
 @var{device} is the number of the Direct3D 9 display adapter.
 
+@item d3d11va
+@var{device} is the number of the Direct3D 11 display adapter.
+
 @item vaapi
 @var{device} is either an X11 display name or a DRM render node.
 If not specified, it will attempt to open the default X11 display (@emph{$DISPLAY})
@@ -1127,9 +1130,21 @@ If not specified, it will attempt to open the default X11 display (@emph{$DISPLA
 @end table
 If not specified, @samp{auto_any} is used.
 (Note that it may be easier to achieve the desired result for QSV by creating the
-platform-appropriate subdevice (@samp{dxva2} or @samp{vaapi}) and then deriving a
+platform-appropriate subdevice (@samp{dxva2} or @samp{d3d11va} or @samp{vaapi}) and then deriving a
 QSV device from that.)
 
+Alternatively, @samp{child_device_type} helps to choose platform-appropriate subdevice type.
+On Windows @samp{d3d11va} is used as default subdevice type.
+
+Examples:
+@table @emph
+@item -init_hw_device qsv:hw,child_device_type=d3d11va
+Choose the GPU subdevice with type @samp{d3d11va} and create QSV device with @samp{MFX_IMPL_HARDWARE}.
+
+@item -init_hw_device qsv:hw,child_device_type=dxva2
+Choose the GPU subdevice with type @samp{dxva2} and create QSV device with @samp{MFX_IMPL_HARDWARE}.
+@end table
+
 @item opencl
 @var{device} selects the platform and device as @emph{platform_index.device_index}.
 
@@ -1232,6 +1247,9 @@ Use VDPAU (Video Decode and Presentation API for Unix) hardware acceleration.
 @item dxva2
 Use DXVA2 (DirectX Video Acceleration) hardware acceleration.
 
+@item d3d11va
+Use D3D11VA (DirectX Video Acceleration) hardware acceleration.
+
 @item vaapi
 Use VAAPI (Video Acceleration API) hardware acceleration.