[FFmpeg-devel] [PATCH 5/6] avcodec/apng: Add support for blending with GRAY8A pixel format

[Paul B Mahol]

Dana 2. 6. 2015. 17:50 osoba "Donny Yang" <work at kota.moe> napisala je:
>
> Signed-off-by: Donny Yang <work at kota.moe>
> ---
>  libavcodec/pngdec.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
> index 1f5c433..1667530 100644
> --- a/libavcodec/pngdec.c
> +++ b/libavcodec/pngdec.c
> @@ -891,7 +891,8 @@ static int handle_p_frame_apng(AVCodecContext *avctx,
PNGDecContext *s,
>          return AVERROR(ENOMEM);
>
>      if (s->blend_op == APNG_BLEND_OP_OVER &&
> -        avctx->pix_fmt != AV_PIX_FMT_RGBA) {
> +        avctx->pix_fmt != AV_PIX_FMT_RGBA &&
> +        avctx->pix_fmt != AV_PIX_FMT_GRAY8A) {
>          avpriv_request_sample(avctx, "Blending with pixel format %s",
>                                av_get_pix_fmt_name(avctx->pix_fmt));
>          return AVERROR_PATCHWELCOME;
> @@ -935,6 +936,11 @@ static int handle_p_frame_apng(AVCodecContext
*avctx, PNGDecContext *s,
>                      foreground_alpha = foreground[3];
>                      background_alpha = background[3];
>                      break;
> +
> +                case AV_PIX_FMT_GRAY8A:
> +                    foreground_alpha = foreground[1];
> +                    background_alpha = background[1];
> +                    break;
>                  }
>
>                  if (foreground_alpha == 0)
> --
> 2.4.0
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel

Is there actual sample?