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@ -24,47 +24,55 @@ |
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static int h264_probe(AVProbeData *p) |
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{ |
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uint32_t code= -1; |
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int sps=0, pps=0, idr=0, res=0, sli=0; |
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uint32_t code = -1; |
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int sps = 0, pps = 0, idr = 0, res = 0, sli = 0; |
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int i; |
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for(i=0; i<p->buf_size; i++){ |
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code = (code<<8) + p->buf[i]; |
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for (i = 0; i < p->buf_size; i++) { |
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code = (code << 8) + p->buf[i]; |
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if ((code & 0xffffff00) == 0x100) { |
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int ref_idc= (code>>5)&3; |
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int type = code & 0x1F; |
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static const int8_t ref_zero[32]={ |
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2, 0, 0, 0, 0,-1, 1,-1, |
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-1, 1, 1, 1, 1,-1, 2, 2, |
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2, 2, 2, 0, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2 |
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int ref_idc = (code >> 5) & 3; |
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int type = code & 0x1F; |
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static const int8_t ref_zero[] = { |
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2, 0, 0, 0, 0, -1, 1, -1, |
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-1, 1, 1, 1, 1, -1, 2, 2, |
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2, 2, 2, 0, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2 |
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}; |
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if(code & 0x80) //forbidden bit
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if (code & 0x80) // forbidden_bit
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return 0; |
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if(ref_zero[type] == 1 && ref_idc) |
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if (ref_zero[type] == 1 && ref_idc) |
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return 0; |
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if(ref_zero[type] ==-1 && !ref_idc) |
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if (ref_zero[type] == -1 && !ref_idc) |
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return 0; |
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if(ref_zero[type] == 2) |
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if (ref_zero[type] == 2) |
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res++; |
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switch(type){ |
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case 1: sli++; break; |
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case 5: idr++; break; |
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case 7: |
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switch (type) { |
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case 1: |
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sli++; |
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break; |
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case 5: |
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idr++; |
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break; |
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case 7: |
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if (p->buf[i + 2] & 0x03) |
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return 0; |
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sps++; |
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break; |
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case 8: pps++; break; |
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case 8: |
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pps++; |
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break; |
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} |
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} |
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} |
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if(sps && pps && (idr||sli>3) && res<(sps+pps+idr)) |
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return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
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if (sps && pps && (idr || sli > 3) && res < (sps + pps + idr)) |
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return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
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return 0; |
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} |
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FF_DEF_RAWVIDEO_DEMUXER(h264 , "raw H.264 video", h264_probe, "h26l,h264,264", AV_CODEC_ID_H264) |
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FF_DEF_RAWVIDEO_DEMUXER(h264, "raw H.264 video", h264_probe, "h26l,h264,264", AV_CODEC_ID_H264) |
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