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avformat/avidec: use avpriv_find_start_code in avi_read_packet()

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Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
zhaoxiu.zeng 2015-03-15 16:38:27 +08:00 committed by Michael Niedermayer
parent e3f5b6f16d
commit bf696e265a
1 changed files with 8 additions and 8 deletions
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16
libavformat/avidec.c
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@ -36,6 +36,7 @@
#include "riff.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/exif.h"
#include "libavcodec/internal.h"
#include "libavformat/isom.h"
typedef struct AVIStream {
@ -1446,17 +1447,16 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (index >= 0 && e->timestamp == ast->frame_offset) {
if (index == st->nb_index_entries-1) {
int key=1;
int i;
uint32_t state=-1;
for (i=0; i<FFMIN(size,256); i++) {
if (st->codec->codec_id == AV_CODEC_ID_MPEG4) {
if (state == 0x1B6) {
key= !(pkt->data[i]&0xC0);
if (st->codec->codec_id == AV_CODEC_ID_MPEG4) {
const uint8_t *ptr = pkt->data, *end = ptr + FFMIN(size, 256);
while (ptr < end) {
ptr = avpriv_find_start_code(ptr, end, &state);
if (state == 0x1B6 && ptr < end) {
key = !(*ptr & 0xC0);
break;
}
}else
break;
state= (state<<8) + pkt->data[i];
}
}
if (!key)
e->flags &= ~AVINDEX_KEYFRAME;