mirror of https://git.ffmpeg.org/ffmpeg.git
Improve sierravmd probe. It is still quite weak, but further improvements
are non-obvious and probably need a large (about 1kB at least) probe buffer. Originally committed as revision 19850 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -61,10 +61,17 @@ typedef struct VmdDemuxContext {
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static int vmd_probe(AVProbeData *p)
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static int vmd_probe(AVProbeData *p)
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{
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{
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int w, h;
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if (p->buf_size < 16)
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return 0;
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/* check if the first 2 bytes of the file contain the appropriate size
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/* check if the first 2 bytes of the file contain the appropriate size
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* of a VMD header chunk */
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* of a VMD header chunk */
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if (AV_RL16(&p->buf[0]) != VMD_HEADER_SIZE - 2)
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if (AV_RL16(&p->buf[0]) != VMD_HEADER_SIZE - 2)
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return 0;
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return 0;
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w = AV_RL16(&p->buf[12]);
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h = AV_RL16(&p->buf[14]);
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if (!w || w > 2048 || !h || h > 2048)
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return 0;
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/* only return half certainty since this check is a bit sketchy */
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/* only return half certainty since this check is a bit sketchy */
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return AVPROBE_SCORE_MAX / 2;
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return AVPROBE_SCORE_MAX / 2;
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