[FFmpeg-devel] [PATCH v2 2/9] avcodec: add D3D12VA hardware accelerated H264 decoding

[Michael Niedermayer]

On Wed, May 31, 2023 at 11:07:15AM +0800, Tong Wu wrote:
> From: Wu Jianhua <toqsxw at 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 at outlook.com>
> Signed-off-by: Tong Wu <tong1.wu at intel.com>
> ---
>  configure                   |   2 +
>  libavcodec/Makefile         |   3 +
>  libavcodec/d3d11va.h        |   3 -
>  libavcodec/d3d12va.c        | 552 ++++++++++++++++++++++++++++++++++++
>  libavcodec/d3d12va.h        | 184 ++++++++++++
>  libavcodec/d3d12va_h264.c   | 210 ++++++++++++++
>  libavcodec/dxva2.c          |  24 ++
>  libavcodec/dxva2.h          |   3 -
>  libavcodec/dxva2_h264.c     |  12 +-
>  libavcodec/dxva2_internal.h |  69 +++--
>  libavcodec/h264_slice.c     |   4 +
>  libavcodec/h264dec.c        |   3 +
>  libavcodec/hwaccels.h       |   1 +
>  libavcodec/hwconfig.h       |   2 +
>  14 files changed, 1030 insertions(+), 42 deletions(-)
>  create mode 100644 libavcodec/d3d12va.c
>  create mode 100644 libavcodec/d3d12va.h
>  create mode 100644 libavcodec/d3d12va_h264.c

seems to break build on mingw64 here
 make
CC	libavcodec/dxva2.o
In file included from src/libavcodec/dxva2.c:33:0:
src/libavcodec/dxva2.c: In function ‘ff_dxva2_get_surface_index’:
src/libavcodec/dxva2_internal.h:48:43: error: pasting "." and "surface_count" does not give a valid preprocessing token
 #define D3D11VA_VAR(ctx, var) ctx->d3d11va.##var
                                           ^
src/libavcodec/dxva2_internal.h:123:114: note: in expansion of macro ‘D3D11VA_VAR’
 #define DXVA2_CONTEXT_VAR(avctx, ctx, var) (avctx->pix_fmt == AV_PIX_FMT_D3D12 ? 0 : (ff_dxva2_is_d3d11(avctx) ? D3D11VA_VAR(ctx, var) :  DXVA2_VAR(ctx, var)))
                                                                                                                  ^~~~~~~~~~~
src/libavcodec/dxva2_internal.h:127:49: note: in expansion of macro ‘DXVA2_CONTEXT_VAR’
 #define DXVA_CONTEXT_COUNT(avctx, ctx)          DXVA2_CONTEXT_VAR(avctx, ctx, surface_count)
                                                 ^~~~~~~~~~~~~~~~~
src/libavcodec/dxva2.c:791:21: note: in expansion of macro ‘DXVA_CONTEXT_COUNT’
     for (i = 0; i < DXVA_CONTEXT_COUNT(avctx, ctx); i++) {
                     ^
In file included from src/libavcodec/dxva2.c:33:0:
src/libavcodec/dxva2_internal.h:40:39: error: pasting "." and "surface_count" does not give a valid preprocessing token
 #define DXVA2_VAR(ctx, var) ctx->dxva2.##var
                                       ^
src/libavcodec/dxva2_internal.h:123:139: note: in expansion of macro ‘DXVA2_VAR’
 #define DXVA2_CONTEXT_VAR(avctx, ctx, var) (avctx->pix_fmt == AV_PIX_FMT_D3D12 ? 0 : (ff_dxva2_is_d3d11(avctx) ? D3D11VA_VAR(ctx, var) :  DXVA2_VAR(ctx, var)))
                                                                                                                                           ^~~~~~~~~
src/libavcodec/dxva2_internal.h:127:49: note: in expansion of macro ‘DXVA2_CONTEXT_VAR’
 #define DXVA_CONTEXT_COUNT(avctx, ctx)          DXVA2_CONTEXT_VAR(avctx, ctx, surface_count)
                                                 ^~~~~~~~~~~~~~~~~
src/libavcodec/dxva2.c:791:21: note: in expansion of macro ‘DXVA_CONTEXT_COUNT’
     for (i = 0; i < DXVA_CONTEXT_COUNT(avctx, ctx); i++) {
                     ^
src/ffbuild/common.mak:81: recipe for target 'libavcodec/dxva2.o' failed
make: *** [libavcodec/dxva2.o] Error 1

[...]

--
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

There will always be a question for which you do not know the correct answer.
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