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@ -44,6 +44,26 @@ static int cdxa_probe(AVProbeData *p) |
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return 0; |
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} |
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static int check_pes(uint8_t *p, uint8_t *end){ |
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int pes1; |
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int pes2= (p[3] & 0xC0) == 0x80 |
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&& (p[4] & 0xC0) != 0x40 |
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&&((p[4] & 0xC0) == 0x00 || (p[4]&0xC0)>>2 == (p[6]&0xF0)); |
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for(p+=3; p<end && *p == 0xFF; p++); |
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if((*p&0xC0) == 0x40) p+=2; |
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if((*p&0xF0) == 0x20){ |
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pes1= p[0]&p[2]&p[4]&1; |
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p+=5; |
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}else if((*p&0xF0) == 0x30){ |
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pes1= p[0]&p[2]&p[4]&p[5]&p[7]&p[9]&1; |
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p+=10; |
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}else |
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pes1 = *p == 0x0F; |
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return pes1||pes2; |
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} |
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static int mpegps_probe(AVProbeData *p) |
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{ |
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uint32_t code= -1; |
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@ -58,11 +78,13 @@ static int mpegps_probe(AVProbeData *p) |
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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 pes= check_pes(p->buf+i, p->buf+i+p->buf_size); |
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if(code == SYSTEM_HEADER_START_CODE) sys++; |
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else if(code == PRIVATE_STREAM_1) priv1++; |
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else if(code == PACK_START_CODE) pspack++; |
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else if((code & 0xf0) == VIDEO_ID) vid++; |
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else if((code & 0xe0) == AUDIO_ID) audio++; |
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else if((code & 0xf0) == VIDEO_ID && pes) vid++; |
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else if((code & 0xe0) == AUDIO_ID && pes) audio++; |
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} |
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} |
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