On 2017/12/15 15:03, wbse...@gmail.com wrote:
> From: wang-bin <wbse...@gmail.com>
>
> a hw decoder may have software or hybrid implementation, for example
> videotoolbox hevc.
> the performance may be better than ffmpeg sw decoder.
It's confused, and I think wm4 give a other patch for this case. you can
refer to
https://patchwork.ffmpeg.org/patch/6773/
> ---
> libavcodec/avcodec.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index ce089b7c4a..6d1f5ee532 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -3725,6 +3725,10 @@ typedef struct AVHWAccel {
> */
> #define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
>
> +/**
> + * Hardware acceleration can use it's software implementation.
> + */
> +#define AV_HWACCEL_FLAG_ALLOW_SOFTWARE (1 << 3)
> /**
> * @}
> */
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