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adx: fix the data offset parsing in adx_decode_header()

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first 2 bytes are 0x80, 0x00. offset is only 16-bit.
this is according to format descriptions on multimedia wiki and wikipedia.
This commit is contained in:
Justin Ruggles 2011-11-20 12:57:21 -05:00
parent 837bbd19eb
commit ca9e4727ba
1 changed files with 2 additions and 2 deletions
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4
libavcodec/adxdec.c
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@ -90,9 +90,9 @@ static int adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,
ADXContext *c = avctx->priv_data;
int offset;
if (buf[0] != 0x80)
if (AV_RB16(buf) != 0x8000)
return AVERROR_INVALIDDATA;
offset = (AV_RB32(buf) ^ 0x80000000) + 4;
offset = AV_RB16(buf + 2) + 4;
if (bufsize < offset || memcmp(buf + offset - 6, "(c)CRI", 6))
return AVERROR_INVALIDDATA;