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avcodec_align_dimensions2: set only 4 linesizes, not AV_NUM_DATA_POINTERS.

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This function is video-only, so there's no point in setting more
linesizes.

Fixes stack corruption in avplay.
This commit is contained in:
Anton Khirnov 2012-01-28 08:46:22 +01:00
parent be822d77b6
commit 2d9535ad31
1 changed files with 2 additions and 2 deletions
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4
libavcodec/utils.c
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@ -219,7 +219,7 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
*height+=2; // some of the optimized chroma MC reads one line too much
// which is also done in mpeg decoders with lowres > 0
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
for (i = 0; i < 4; i++)
linesize_align[i] = STRIDE_ALIGN;
//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
@ -229,7 +229,7 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
s->codec_id == CODEC_ID_VP6A) {
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
for (i = 0; i < 4; i++)
linesize_align[i] = 16;
}
#endif