pngdec: Add support for PIX_FMT_Y400A

Originally committed as revision 22882 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index aa05ff020b75cbc0dbd102746f3d016c2f9d2730..03859a99139c92fda9ee80a43fd96c507e0cec21 100644 (file)
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -489,6 +489,8 @@ static int decode_frame(AVCodecContext *avctx,
                     avctx->pix_fmt = PIX_FMT_MONOBLACK;
                 } else if (s->color_type == PNG_COLOR_TYPE_PALETTE) {
                     avctx->pix_fmt = PIX_FMT_PAL8;
+                } else if (s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
+                    avctx->pix_fmt = PIX_FMT_Y400A;
                 } else {
                     goto fail;
                 }