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ff_dv_frame_profile2: Check input buffer size.

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Based on code by DivX, Inc. / drffmpeg

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-04 04:21:19 +02:00
parent dd968a2edf
commit 51b0694bc0
1 changed files with 5 additions and 3 deletions
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8
libavcodec/dvdata.c
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@ -249,11 +249,13 @@ static const DVprofile dv_profiles[] = {
const DVprofile* ff_dv_frame_profile2(AVCodecContext* codec, const DVprofile *sys,
const uint8_t* frame, unsigned buf_size)
{
int i;
int i, dsf, stype;
int dsf = (frame[3] & 0x80) >> 7;
if(buf_size < DV_PROFILE_BYTES)
return NULL;
int stype = frame[80*5 + 48 + 3] & 0x1f;
dsf = (frame[3] & 0x80) >> 7;
stype = frame[80*5 + 48 + 3] & 0x1f;
/* 576i50 25Mbps 4:1:1 is a special case */
if (dsf == 1 && stype == 0 && frame[4] & 0x07 /* the APT field */) {