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Merge commit '676da248cad49debc40720baa13214f0b94dcc71'

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* commit '676da248cad49debc40720baa13214f0b94dcc71':
  vmd: refactor the inner decode loop

Conflicts:
	libavcodec/vmdav.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2013-05-30 09:44:57 +02:00
parent 8ef89833d0 676da248ca
commit ab78e21ea2
1 changed files with 85 additions and 81 deletions
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16
libavcodec/vmdav.c
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@@ -270,9 +270,11 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
return AVERROR_INVALIDDATA;
}
}
if (s->size > 0) {
if (!s->size)
return 0;
/* originally UnpackFrame in VAG's code */
bytestream2_init(&gb, gb.buffer, s->buf + s->size - gb.buffer);
if (bytestream2_get_bytes_left(&gb) < 1)
return AVERROR_INVALIDDATA;
meth = bytestream2_get_byteu(&gb);
@@ -293,7 +295,8 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
len = bytestream2_get_byte(&gb);
if (len & 0x80) {
len = (len & 0x7F) + 1;
if (ofs + len > frame_width || bytestream2_get_bytes_left(&gb) < len)
if (ofs + len > frame_width ||
bytestream2_get_bytes_left(&gb) < len)
return AVERROR_INVALIDDATA;
bytestream2_get_bufferu(&gb, &dp[ofs], len);
ofs += len;
@@ -306,7 +309,8 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
}
} while (ofs < frame_width);
if (ofs > frame_width) {
av_log(s->avctx, AV_LOG_ERROR, "offset > width (%d > %d)\n",
av_log(s->avctx, AV_LOG_ERROR,
"offset > width (%d > %d)\n",
ofs, frame_width);
return AVERROR_INVALIDDATA;
}
@@ -346,7 +350,8 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
}
} while (ofs < frame_width);
if (ofs > frame_width) {
av_log(s->avctx, AV_LOG_ERROR, "offset > width (%d > %d)\n",
av_log(s->avctx, AV_LOG_ERROR,
"offset > width (%d > %d)\n",
ofs, frame_width);
return AVERROR_INVALIDDATA;
}
@@ -355,7 +360,6 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
}
break;
}
}
return 0;
}