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avcodec/mpegpicture: fix "stride changed" failures in gray mode 

Before adding uvlinesize check, I was seeing failures decoding
some video with ffmpeg compiled with --enable-gray and using AV_CODEC_FLAG_GRAY.

[mpeg2video @ 0x7fa193818c00] get_buffer() failed (stride changed: linesize=1280/1280 uvlinesize=0/640)
[mpeg2video @ 0x7fa193818c00] get_buffer() failed (stride changed: linesize=1280/1280 uvlinesize=0/640)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Aman Gupta 2018-04-10 10:17:52 -07:00
parent 2108a6736f
commit 19128408ac
1 changed files with 5 additions and 3 deletions
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8
libavcodec/mpegpicture.c
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@ -148,10 +148,12 @@ static int alloc_frame_buffer(AVCodecContext *avctx, Picture *pic,
}
}
if (linesize && (linesize != pic->f->linesize[0] ||
uvlinesize != pic->f->linesize[1])) {
if ((linesize && linesize != pic->f->linesize[0]) ||
(uvlinesize && uvlinesize != pic->f->linesize[1])) {
av_log(avctx, AV_LOG_ERROR,
"get_buffer() failed (stride changed)\n");
"get_buffer() failed (stride changed: linesize=%d/%d uvlinesize=%d/%d)\n",
linesize, pic->f->linesize[0],
uvlinesize, pic->f->linesize[1]);
ff_mpeg_unref_picture(avctx, pic);
return -1;
}