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/*
length detection etc.. for mpeg audio
Copyright (C) 2001 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#ifndef __MPEGAUDIOINFO_H
#define __MPEGAUDIOINFO_H
#include "../util/file/fileAccess.h"
class MpegAudioStream;
class MpegAudioHeader;
class MpegAudioFrame;
typedef struct {
char name [30+1];
char artist [30+1];
char album [30+1];
char year [ 4+1];
char comment[30+1];
unsigned char genre;
} ID3TAG;
class MpegAudioInfo {
long length;
int lXingVBR;
ID3TAG* id3;
MpegAudioStream* mpegAudioStream;
MpegAudioHeader* mpegAudioHeader;
MpegAudioFrame * mpegAudioFrame;
FileAccess* input;
int leof;
int initState;
unsigned char inputbuffer[8192];
int lNeedInit;
public:
MpegAudioInfo(FileAccess* input);
~MpegAudioInfo();
void reset();
int initialize();
// store info wheter init need or not here.(after reset its true)
int getNeedInit();
void setNeedInit(int lNeedInit);
// returns byte positions
long getSeekPosition(int second);
// returns length in seconds
long getLength();
// for id3 parsing you need to seek -128 bytes before the end of strem
// after parseID3 you must jump back to 0. This method is blocking
int initializeID3();
ID3TAG* getID3();
void print(const char* msg);
private:
// non-blocking init. return true,false,or -1==eof
int initializeLength(long fileSize);
int initializeID3(long fileSize);
void calculateLength(long fileSize);
int parseXing(unsigned char* frame,int size);
// used for seek
void parseID3();
int getByteDirect();
// extension for xing vbr
#ifdef _FROM_SOURCE
XHEADDATA* xHeadData;
#else
void* xHeadData;
#endif
private:
int getFrame(MpegAudioFrame* frame);
};
#endif
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