id3.h

在SOPC平台上

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 *
 * Copyright (C) 2002 by Linus Nielsen Feltzing
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/


#ifndef ID3_H
#define ID3_H


struct id3info {
    char* title;
    char* artist;
    char* album;
    char* genre_string;
    char* track_string;
    char* year_string;
    char* composer;
    int tracknum;
    int version;
    int layer;
    int year;
    unsigned char id3version;
    unsigned char genre;
    unsigned int codectype;
    unsigned int bitrate;
    unsigned long frequency;
    unsigned long id3v2len;
    unsigned long id3v1len;
    unsigned long first_frame_offset; /* Byte offset to first real MP3 frame.
                                         Used for skipping leading garbage to
                                         avoid gaps between tracks. */
    unsigned long vbr_header_pos;
    unsigned long filesize; /* without headers; in bytes */
    unsigned long length;   /* song length in ms */
    unsigned long elapsed;  /* ms played */

    int lead_trim;          /* Number of samples to skip at the beginning */
    int tail_trim;          /* Number of samples to remove from the end */
    
    /* local buffering */
    char id3v2buf[300];
    char id3v1buf[3][32];
};

enum {
    ID3_VER_1_0 = 1,
    ID3_VER_1_1,
    ID3_VER_2_2,
    ID3_VER_2_3,
    ID3_VER_2_4
};


int getid3info( int fd, struct id3info *mp3 );
char* id3_get_genre(const struct id3info* id3);


#endif /* ID3_H */