libmpdemux/mp3_hdr.h


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int mp_decode_mp3_header(unsigned char* hbuf);

static inline int mp_check_mp3_header(unsigned int head){
    if( (head & 0x0000e0ff) != 0x0000e0ff ||  
        (head & 0x00fc0000) == 0x00fc0000) return 0;
    if(mp_decode_mp3_header((unsigned char*)(&head))<=0) return 0;
    return 1;
}