Re: [FFmpeg-devel] [PATCH 1/6] lavu/hwcontext_qsv: specify Shift for each format

["Xiang, Haihao" <haihao.xiang-at-intel.com@ffmpeg.org>]

On Thu, 2022-10-06 at 15:35 +0800, Xiang, Haihao wrote:
> From: Haihao Xiang <haihao.xiang@intel.com>
> 
> We can't get Shift from bit depth for some formats in the SDK. For
> example, bit depth is 10, however Shift is 0 for Y410 (XV30 in FFmpeg).
> In order to support these formats in the next commits, this patch
> specified Shift for each format
> 
> Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
> ---
>  libavutil/hwcontext_qsv.c | 27 +++++++++++++++++++--------
>  1 file changed, 19 insertions(+), 8 deletions(-)
> 
> diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c
> index 9fa0dfa1c0..2272df52f2 100644
> --- a/libavutil/hwcontext_qsv.c
> +++ b/libavutil/hwcontext_qsv.c
> @@ -109,20 +109,21 @@ typedef struct QSVFramesContext {
>  static const struct {
>      enum AVPixelFormat pix_fmt;
>      uint32_t           fourcc;
> +    uint16_t           mfx_shift;
>  } supported_pixel_formats[] = {
> -    { AV_PIX_FMT_NV12, MFX_FOURCC_NV12 },
> -    { AV_PIX_FMT_BGRA, MFX_FOURCC_RGB4 },
> -    { AV_PIX_FMT_P010, MFX_FOURCC_P010 },
> -    { AV_PIX_FMT_PAL8, MFX_FOURCC_P8   },
> +    { AV_PIX_FMT_NV12, MFX_FOURCC_NV12, 0 },
> +    { AV_PIX_FMT_BGRA, MFX_FOURCC_RGB4, 0 },
> +    { AV_PIX_FMT_P010, MFX_FOURCC_P010, 1 },
> +    { AV_PIX_FMT_PAL8, MFX_FOURCC_P8,   0 },
>  #if CONFIG_VAAPI
>      { AV_PIX_FMT_YUYV422,
> -                       MFX_FOURCC_YUY2 },
> +                       MFX_FOURCC_YUY2, 0 },
>      { AV_PIX_FMT_Y210,
> -                       MFX_FOURCC_Y210 },
> +                       MFX_FOURCC_Y210, 1 },
>      // VUYX is used for VAAPI child device,
>      // the SDK only delares support for AYUV
>      { AV_PIX_FMT_VUYX,
> -                       MFX_FOURCC_AYUV },
> +                       MFX_FOURCC_AYUV, 0 },
>  #endif
>  };
>  
> @@ -170,6 +171,16 @@ static uint32_t qsv_fourcc_from_pix_fmt(enum
> AVPixelFormat pix_fmt)
>      return 0;
>  }
>  
> +static uint16_t qsv_shift_from_pix_fmt(enum AVPixelFormat pix_fmt)
> +{
> +    for (int i = 0; i < FF_ARRAY_ELEMS(supported_pixel_formats); i++) {
> +        if (supported_pixel_formats[i].pix_fmt == pix_fmt)
> +            return supported_pixel_formats[i].mfx_shift;
> +    }
> +
> +    return 0;
> +}
> +
>  #if CONFIG_D3D11VA
>  static uint32_t qsv_get_d3d11va_bind_flags(int mem_type)
>  {
> @@ -503,7 +514,7 @@ static int qsv_init_surface(AVHWFramesContext *ctx,
> mfxFrameSurface1 *surf)
>  
>      surf->Info.BitDepthLuma   = desc->comp[0].depth;
>      surf->Info.BitDepthChroma = desc->comp[0].depth;
> -    surf->Info.Shift          = desc->comp[0].depth > 8;
> +    surf->Info.Shift          = qsv_shift_from_pix_fmt(ctx->sw_format);
>  
>      if (desc->log2_chroma_w && desc->log2_chroma_h)
>          surf->Info.ChromaFormat   = MFX_CHROMAFORMAT_YUV420;

Will apply,

-Haihao
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