diff options
| author | zhaoxiu.zeng <zhaoxiu.zeng@gmail.com> | 2015-03-15 16:46:22 +0800 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-03-15 13:28:44 +0100 |
| commit | 84d8b4fb812c2a7eed31c3abc6bab2ec747b7666 (patch) | |
| tree | 5384c6a6d271c38bb50bceb71b28c961ef2d1b62 /libavformat/mpegvideodec.c | |
| parent | 213ddcb0298bd59d0a70c871d0b5dde5065474de (diff) | |
| download | ffmpeg-84d8b4fb812c2a7eed31c3abc6bab2ec747b7666.tar.gz | |
avformat/mpegvideodec: use avpriv_find_start_code in mpegvideo_probe()
Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat/mpegvideodec.c')
| -rw-r--r-- | libavformat/mpegvideodec.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/libavformat/mpegvideodec.c b/libavformat/mpegvideodec.c index ade76d860e..5ea5569379 100644 --- a/libavformat/mpegvideodec.c +++ b/libavformat/mpegvideodec.c @@ -24,6 +24,7 @@ #include "rawdec.h" #include "libavutil/intreadwrite.h" +#include "libavcodec/internal.h" #define SEQ_START_CODE 0x000001b3 #define GOP_START_CODE 0x000001b8 @@ -37,26 +38,27 @@ 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, j; + const uint8_t *ptr = p->buf, *end = ptr + p->buf_size; uint32_t last = 0; + int j; - for(i=0; i<p->buf_size; i++){ - code = (code<<8) + p->buf[i]; + while (ptr < end) { + ptr = avpriv_find_start_code(ptr, end, &code); if ((code & 0xffffff00) == 0x100) { switch(code){ case SEQ_START_CODE: - if (!(p->buf[i+1+3+1+2] & 0x20)) + if (!(ptr[3 + 1 + 2] & 0x20)) break; - j = i; - if (p->buf[j+8] & 2) + j = -1; + if (ptr[j + 8] & 2) j+= 64; - if (j >= p->buf_size) + if (ptr + j >= end) break; - if (p->buf[j+8] & 1) + if (ptr[j + 8] & 1) j+= 64; - if (j >= p->buf_size) + if (ptr + j >= end) break; - if (AV_RB24(p->buf + j + 9) & 0xFFFFFE) + if (AV_RB24(ptr + j + 9) & 0xFFFFFE) break; seq++; break; |