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dfa: use av_memcpy_backptr() where previously impossible

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Since the requirement for output padding has been lifted, we can
use av_memcpy_backptr() here as well.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2012-10-23 18:17:46 +01:00
parent e831b3b852
commit a153e45b95
1 changed files with 1 additions and 3 deletions
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libavcodec/dfa.c
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@ -122,9 +122,7 @@ static int decode_dsw1(GetByteContext *gb, uint8_t *frame, int width, int height
count = ((v >> 13) + 2) << 1;
if (frame - frame_start < offset || frame_end - frame < count)
return AVERROR_INVALIDDATA;
// can't use av_memcpy_backptr() since it can overwrite following pixels
for (v = 0; v < count; v++)
frame[v] = frame[v - offset];
av_memcpy_backptr(frame, offset, count);
frame += count;
} else if (bitbuf & (mask << 1)) {
frame += bytestream2_get_le16(gb);