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authorMichael Niedermayer <michaelni@gmx.at>2013-11-07 18:39:23 +0100
committerMichael Niedermayer <michaelni@gmx.at>2013-11-07 20:39:08 +0100
commit3836af476534e6f84be7b3a19afce3530af50703 (patch)
tree9b8d67cca391d764c7ef8b6da85b0d899f4efc42 /libavformat
parent3bcd5c1e31e2f222a65e727a9681b23b89506f38 (diff)
downloadffmpeg-3836af476534e6f84be7b3a19afce3530af50703.tar.gz
avformat/mpegvideodec: check seq headers more completely during probing
Fixes probetest failure Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat')
-rw-r--r--libavformat/mpegvideodec.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/libavformat/mpegvideodec.c b/libavformat/mpegvideodec.c
index a400978d02..ade76d860e 100644
--- a/libavformat/mpegvideodec.c
+++ b/libavformat/mpegvideodec.c
@@ -23,6 +23,8 @@
#include "avformat.h"
#include "rawdec.h"
+#include "libavutil/intreadwrite.h"
+
#define SEQ_START_CODE 0x000001b3
#define GOP_START_CODE 0x000001b8
#define PICTURE_START_CODE 0x00000100
@@ -35,14 +37,29 @@ static int mpegvideo_probe(AVProbeData *p)
{
uint32_t code= -1;
int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0, sicle=0;
- int i;
+ int i, j;
uint32_t last = 0;
for(i=0; i<p->buf_size; i++){
code = (code<<8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
switch(code){
- case SEQ_START_CODE: seq++; break;
+ case SEQ_START_CODE:
+ if (!(p->buf[i+1+3+1+2] & 0x20))
+ break;
+ j = i;
+ if (p->buf[j+8] & 2)
+ j+= 64;
+ if (j >= p->buf_size)
+ break;
+ if (p->buf[j+8] & 1)
+ j+= 64;
+ if (j >= p->buf_size)
+ break;
+ if (AV_RB24(p->buf + j + 9) & 0xFFFFFE)
+ break;
+ seq++;
+ break;
case PICTURE_START_CODE: pic++; break;
case PACK_START_CODE: pspack++; break;
case 0x1b6: