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doc/ffmpeg: update the documentation about qsv device creation 

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
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Haihao Xiang 2024-01-16 13:23:10 +08:00 committed by Stefano Sabatini
parent 344d3a7d45
commit 6414ecd857
1 changed files with 24 additions and 2 deletions
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@ -1400,16 +1400,38 @@ If not specified, @samp{auto_any} is used.
platform-appropriate subdevice (@samp{dxva2} or @samp{d3d11va} 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.) QSV device from that.)
Alternatively, @samp{child_device_type} helps to choose platform-appropriate subdevice type. The following options are recognized:
On Windows @samp{d3d11va} is used as default subdevice type. @table @option
@item child_device
Specify a DRM render node on Linux or DirectX adapter on Windows.
@item child_device_type
Choose platform-appropriate subdevice type. On Windows @samp{d3d11va} is used
as default subdevice type when @code{--enable-libvpl} is specified at configuration time,
@samp{dxva2} is used as default subdevice type when @code{--enable-libmfx} is specified at
configuration time. On Linux user can use @samp{vaapi} only as subdevice type.
@end table
Examples: Examples:
@table @emph @table @emph
@item -init_hw_device qsv:hw,child_device=/dev/dri/renderD129
Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DRM render node @file{/dev/dri/renderD129}.
@item -init_hw_device qsv:hw,child_device=1
Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DirectX adapter 1.
@item -init_hw_device qsv:hw,child_device_type=d3d11va @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}. 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 @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}. Choose the GPU subdevice with type @samp{dxva2} and create QSV device with @samp{MFX_IMPL_HARDWARE}.
@item -init_hw_device qsv:hw,child_device=1,child_device_type=d3d11va
Create a QSV device with @samp{MFX_IMPL_HARDWARE} on DirectX adapter 1 with subdevice type @samp{d3d11va}.
@item -init_hw_device vaapi=va:/dev/dri/renderD129 -init_hw_device qsv=hw1@@@var{va}
Create a VAAPI device called @samp{va} on @file{/dev/dri/renderD129}, then derive a QSV device called @samp{hw1}
from device @samp{va}.
@end table @end table
@item opencl @item opencl