diff options
| author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-01-26 00:22:50 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-01-29 19:30:25 +0100 |
| commit | 9953fc9a2372cb09ec8e3d9395611f4285916d46 (patch) | |
| tree | 96c0027d3e0baed8a440575dd3824ee50794c483 /libavcodec/mpegvideo.c | |
| parent | 83c1ac65701f10f21186447aa5e20d83044914c5 (diff) | |
avcodec/mpegvideo: Fix off-by-one error when decoding >8 bit MPEG-4
Fixes visual corruptions on two macroblocks from two frames from
https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4447/A003C003_SR_422_23.98p.mxf
Reviewed-by: Kieran Kunhya <kierank@obe.tv>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/mpegvideo.c')
| -rw-r--r-- | libavcodec/mpegvideo.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index e9f2fb212a..47603c2991 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -1648,8 +1648,8 @@ void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64], int vsub = i ? s->chroma_y_shift : 0; int hsub = i ? s->chroma_x_shift : 0; dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub) - 1); - for(h = (16 >> vsub)-1; h >= 1; h--){ - for(w = (16 >> hsub)-1; w >= 1; w--) + for (h = (16 >> vsub) - 1; h >= 0; h--) { + for (w = (16 >> hsub) - 1; w >= 0; w--) dest_pcm[i][w] = (*s->dpcm_macroblock)[i][idx++]; dest_pcm[i] -= linesize[i] / 2; } |