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Stricter TMV probe 

Originally committed as revision 20194 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Verkamp 2009-10-09 18:24:47 +00:00
parent 0359289d1d
commit f19ae9ea4d
1 changed files with 11 additions and 2 deletions
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13
libavformat/tmv.c
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@ -43,10 +43,19 @@ typedef struct TMVContext {
unsigned stream_index;
} TMVContext;
#define PROBE_MIN_SAMPLE_RATE 5000
#define PROBE_MAX_FPS 120
#define PROBE_MIN_AUDIO_SIZE (PROBE_MIN_SAMPLE_RATE / PROBE_MAX_FPS)
static int tmv_probe(AVProbeData *p)
{
if (AV_RL32(p->buf) == TMV_TAG)
return AVPROBE_SCORE_MAX;
if (AV_RL32(p->buf) == TMV_TAG &&
AV_RL16(p->buf+4) >= PROBE_MIN_SAMPLE_RATE &&
AV_RL16(p->buf+6) >= PROBE_MIN_AUDIO_SIZE &&
!p->buf[8] && // compression method
p->buf[9] && // char cols
p->buf[10]) // char rows
return AVPROBE_SCORE_MAX / (p->buf[9] == 40 && p->buf[10] == 25)? 1 : 4;
return 0;
}