Re: [FFmpeg-devel] [PATCH v10 2/9] avcodec: add D3D12VA hardware accelerated H264 decoding

[Michael Niedermayer <michael@niedermayer.cc>]

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On Sat, Dec 02, 2023 at 06:12:42PM +0800, Tong Wu wrote:
> From: Wu Jianhua <toqsxw@outlook.com>
> 
> The implementation is based on:
> https://learn.microsoft.com/en-us/windows/win32/medfound/direct3d-12-video-overview
> 
> With the Direct3D 12 video decoding support, we can render or process
> the decoded images by the pixel shaders or compute shaders directly
> without the extra copy overhead, which is beneficial especially if you
> are trying to render or post-process a 4K or 8K video.
> 
> The command below is how to enable d3d12va:
> ffmpeg -hwaccel d3d12va -i input.mp4 output.mp4
> 
> Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
> Signed-off-by: Tong Wu <tong1.wu@intel.com>
> ---
>  configure                   |   2 +
>  libavcodec/Makefile         |   3 +
>  libavcodec/d3d11va.h        |   3 -
>  libavcodec/d3d12va_decode.c | 564 ++++++++++++++++++++++++++++++++++++
>  libavcodec/d3d12va_decode.h | 179 ++++++++++++
>  libavcodec/d3d12va_h264.c   | 207 +++++++++++++
>  libavcodec/dxva2.c          |  29 +-
>  libavcodec/dxva2.h          |   3 -
>  libavcodec/dxva2_av1.c      |   4 +-
>  libavcodec/dxva2_h264.c     |  26 +-
>  libavcodec/dxva2_hevc.c     |   6 +-
>  libavcodec/dxva2_internal.h |  74 ++---
>  libavcodec/dxva2_mpeg2.c    |   6 +-
>  libavcodec/dxva2_vc1.c      |   6 +-
>  libavcodec/dxva2_vp9.c      |   6 +-
>  libavcodec/h264_slice.c     |   4 +
>  libavcodec/h264dec.c        |   3 +
>  libavcodec/hwaccels.h       |   1 +
>  libavcodec/hwconfig.h       |   2 +
>  19 files changed, 1061 insertions(+), 67 deletions(-)
>  create mode 100644 libavcodec/d3d12va_decode.c
>  create mode 100644 libavcodec/d3d12va_decode.h
>  create mode 100644 libavcodec/d3d12va_h264.c

breaks build with mingw64 here

make
CC	libavcodec/dxva2.o
In file included from src/libavcodec/dxva2.c:33:0:
src/libavcodec/dxva2_internal.h:141:39: error: unknown type name ‘D3D12VADecodeContext’; did you mean ‘AVD3D11VADeviceContext’?
                                       D3D12VADecodeContext *ctx, const AVFrame *frame,
                                       ^~~~~~~~~~~~~~~~~~~~
                                       AVD3D11VADeviceContext
src/ffbuild/common.mak:81: recipe for target 'libavcodec/dxva2.o' failed
make: *** [libavcodec/dxva2.o] Error 1


[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Old school: Use the lowest level language in which you can solve the problem
            conveniently.
New school: Use the highest level language in which the latest supercomputer
            can solve the problem without the user falling asleep waiting.

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