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mp3tech.h
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mp3tech.h
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#ifndef __MP3TECH_H__
#define __MP3TECH_H__
#include <unistd.h>
/*
mp3tech.h - Headers for mp3tech.c
Copyright (C) 2000-2001 Cedric Tefft <[email protected]>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************
This file is based in part on:
* MP3Info 0.5 by Ricardo Cerqueira <[email protected]>
* MP3Stat 0.9 by Ed Sweetman <[email protected]> and
Johannes Overmann <[email protected]>
---
The original file is part of mp3info 0.8.4
TriTag: This file was modified (e.g. unused methods were removed) !
*/
/* MIN_CONSEC_GOOD_FRAMES defines how many consecutive valid MP3 frames
we need to see before we decide we are looking at a real MP3 file */
#define MIN_CONSEC_GOOD_FRAMES 4
#define FRAME_HEADER_SIZE 4
#define MIN_FRAME_SIZE 21
#define NUM_SAMPLES 4
#ifndef uint
#define uint unsigned int
#endif
enum VBR_REPORT { VBR_VARIABLE, VBR_AVERAGE, VBR_MEDIAN };
enum SCANTYPE { SCAN_NONE, SCAN_QUICK, SCAN_FULL };
typedef struct {
unsigned long sync;
unsigned int version;
unsigned int layer;
unsigned int crc;
unsigned int bitrate;
unsigned int freq;
unsigned int padding;
unsigned int extension;
unsigned int mode;
unsigned int mode_extension;
unsigned int copyright;
unsigned int original;
unsigned int emphasis;
} mp3header;
typedef struct {
char *filename;
FILE *file;
off_t datasize;
int header_isvalid;
mp3header header;
int id3_isvalid;
char id3tag[130];
int vbr;
float vbr_average;
int seconds;
int frames;
int badframes;
} mp3info;
int get_mp3_info(mp3info *mp3,int scantype, int fullscan_vbr);
// Not used but maybe ill need them later
int get_header(FILE *file,mp3header *header);
int frame_length(mp3header *header);
int header_layer(mp3header *h);
int header_bitrate(mp3header *h);
int sameConstant(mp3header *h1, mp3header *h2);
int header_frequency(mp3header *h);
char *header_emphasis(mp3header *h);
char *header_mode(mp3header *h);
int get_first_header(mp3info *mp3,long startpos);
int get_next_header(mp3info *mp3);
#endif // !__MP3TECH_H__