"Fossies" - the Fresh Open Source Software Archive

Member "mp3info-0.8.5a/mp3tech.h" (6 Nov 2006, 2733 Bytes) of package /linux/misc/old/mp3info-0.8.5a.tgz:

    1 /*
    2     mp3tech.h - Headers for mp3tech.c
    3 
    4     Copyright (C) 2000-2006 Cedric Tefft <cedric@phreaker.net>
    5 
    6     This program is free software; you can redistribute it and/or modify
    7     it under the terms of the GNU General Public License as published by
    8     the Free Software Foundation; either version 2 of the License, or
    9     (at your option) any later version.
   10 
   11     This program is distributed in the hope that it will be useful,
   12     but WITHOUT ANY WARRANTY; without even the implied warranty of
   13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   14     GNU General Public License for more details.
   15 
   16     You should have received a copy of the GNU General Public License
   17     along with this program; if not, write to the Free Software
   18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   19 
   20   ***************************************************************************
   21 
   22   This file is based in part on:
   23 
   24     * MP3Info 0.5 by Ricardo Cerqueira <rmc@rccn.net>
   25     * MP3Stat 0.9 by Ed Sweetman <safemode@voicenet.com> and 
   26              Johannes Overmann <overmann@iname.com>
   27 
   28 */
   29 
   30 /* MIN_CONSEC_GOOD_FRAMES defines how many consecutive valid MP3 frames
   31    we need to see before we decide we are looking at a real MP3 file */
   32 #define MIN_CONSEC_GOOD_FRAMES 4
   33 #define FRAME_HEADER_SIZE 4
   34 #define MIN_FRAME_SIZE 21
   35 #define NUM_SAMPLES 4
   36 
   37 enum VBR_REPORT { VBR_VARIABLE, VBR_AVERAGE, VBR_MEDIAN };
   38 enum SCANTYPE { SCAN_NONE, SCAN_QUICK, SCAN_FULL };
   39 
   40 typedef struct {
   41     unsigned long   sync;
   42     unsigned int    version;
   43     unsigned int    layer;
   44     unsigned int    crc;
   45     unsigned int    bitrate;
   46     unsigned int    freq;
   47     unsigned int    padding;
   48     unsigned int    extension;
   49     unsigned int    mode;
   50     unsigned int    mode_extension;
   51     unsigned int    copyright;
   52     unsigned int    original;
   53     unsigned int    emphasis;
   54 } mp3header;
   55 
   56 typedef struct {
   57     char title[31];
   58     char artist[31];
   59     char album[31];
   60     char year[5];
   61     char comment[31];
   62     unsigned char track[1];
   63     unsigned char genre[1];
   64 } id3tag;
   65 
   66 typedef struct {
   67     char *filename;
   68     FILE *file;
   69     off_t datasize;
   70     int header_isvalid;
   71     mp3header header;
   72     int id3_isvalid;
   73     id3tag id3;
   74     int vbr;
   75     float vbr_average;
   76     int seconds;
   77     int frames;
   78     int badframes;
   79 } mp3info;
   80 
   81 
   82 int get_header(FILE *file,mp3header *header);
   83 int frame_length(mp3header *header);
   84 int header_layer(mp3header *h);
   85 int header_bitrate(mp3header *h);
   86 int sameConstant(mp3header *h1, mp3header *h2);
   87 int get_mp3_info(mp3info *mp3,int scantype, int fullscan_vbr);
   88 int get_id3(mp3info *mp3);
   89 char *pad(char *string, int length);
   90 char *unpad(char *string);
   91 int write_tag(mp3info *mp3);
   92 int header_frequency(mp3header *h);
   93 char *header_emphasis(mp3header *h);
   94 char *header_mode(mp3header *h);
   95 int get_first_header(mp3info *mp3,long startpos);
   96 int get_next_header(mp3info *mp3);