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Merge commit '0aed0bfc62b273a780a2bfba3be56039fccd7423'

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* commit '0aed0bfc62b273a780a2bfba3be56039fccd7423':
  vmd: fix mode 3 decoding

Conflicts:
	libavcodec/vmdav.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-06-03 12:21:25 +02:00
commit c3660c3618
1 changed files with 18 additions and 14 deletions
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32
libavcodec/vmdav.c
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@ -152,9 +152,10 @@ static int rle_unpack(const unsigned char *src, unsigned char *dest,
int src_count, int src_size, int dest_len)
{
unsigned char *pd;
int i, j, l;
int i, l, used = 0;
unsigned char *dest_end = dest + dest_len;
GetByteContext gb;
uint16_t run_val;
bytestream2_init(&gb, src, src_size);
pd = dest;
@ -162,10 +163,9 @@ static int rle_unpack(const unsigned char *src, unsigned char *dest,
if (bytestream2_get_bytes_left(&gb) < 1)
return 0;
*pd++ = bytestream2_get_byteu(&gb);
used++;
}
src_count >>= 1;
i = 0;
do {
if (bytestream2_get_bytes_left(&gb) < 1)
break;
@ -177,18 +177,17 @@ static int rle_unpack(const unsigned char *src, unsigned char *dest,
bytestream2_get_bufferu(&gb, pd, l);
pd += l;
} else {
int ps[2];
if (dest_end - pd < 2*l || bytestream2_get_bytes_left(&gb) < 2)
return bytestream2_tell(&gb);
ps[0] = bytestream2_get_byteu(&gb);
ps[1] = bytestream2_get_byteu(&gb);
for (j = 0; j < l; j++) {
*pd++ = ps[0];
*pd++ = ps[1];
run_val = bytestream2_get_ne16(&gb);
for (i = 0; i < l; i++) {
AV_WN16(pd, run_val);
pd += 2;
}
l *= 2;
}
i += l;
} while (i < src_count);
used += l;
} while (used < src_count);
return bytestream2_tell(&gb);
}
@ -335,13 +334,18 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
len = bytestream2_get_byte(&gb);
if (len & 0x80) {
len = (len & 0x7F) + 1;
if (bytestream2_get_byte(&gb) == 0xFF)
if (bytestream2_peek_byte(&gb) == 0xFF) {
int slen = len;
bytestream2_get_byte(&gb);
len = rle_unpack(gb.buffer, &dp[ofs],
len, bytestream2_get_bytes_left(&gb),
frame_width - ofs);
else
ofs += slen;
bytestream2_skip(&gb, len);
} else {
bytestream2_get_buffer(&gb, &dp[ofs], len);
bytestream2_skip(&gb, len);
ofs += len;
}
} else {
/* interframe pixel copy */
if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])