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av_samples_copy: support overlapping copies 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-07-12 21:36:22 +02:00
parent 19ff479f69
commit 375c0f74d1
1 changed files with 7 additions and 2 deletions
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9
libavutil/samplefmt.c
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@ -208,8 +208,13 @@ int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset,
dst_offset *= block_align;
src_offset *= block_align;
for (i = 0; i < planes; i++)
memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) {
for (i = 0; i < planes; i++)
memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
} else {
for (i = 0; i < planes; i++)
memmove(dst[i] + dst_offset, src[i] + src_offset, data_size);
}
return 0;
}