non/Timeline/Audio_File.H

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/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* 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; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
#pragma once
/* Base class for all audio file library interfaces */
#include <stdlib.h>
#include "types.h"
#include "Peaks.H"
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#include <string>
#include <map>
#include <list>
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class Peak_Writer;
class Audio_File
{
static std::map <std::string, Audio_File*> _open_files;
protected:
struct format_desc
{
const char *name;
const char *extension;
unsigned long id;
};
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const char *_filename;
nframes_t _length; /* length of file in samples */
nframes_t _samplerate; /* sample rate */
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int _channels;
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Peaks *_peaks;
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Peak_Writer *_peak_writer;
static const format_desc *
find_format ( const format_desc *fd, const char *name )
{
for ( ; fd->name; ++fd )
if ( ! strcmp( fd->name, name ) )
return fd;
return NULL;
}
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public:
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Audio_File ( )
{
_filename = NULL;
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_length = _channels = 0;
}
virtual ~Audio_File ( );
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static void all_supported_formats ( std::list <const char *> &formats );
static Audio_File *from_file ( const char *filename );
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Peaks const * peaks ( ) { return _peaks; }
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const char *name ( void ) const { return _filename; }
nframes_t length ( void ) const { return _length; }
int channels ( void ) const { return _channels; }
nframes_t samplerate ( void ) const { return _samplerate; }
// Peaks const * peaks ( void ) { return &_peaks; }
virtual bool open ( void ) = 0;
virtual void close ( void ) = 0;
virtual void seek ( nframes_t offset ) = 0;
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virtual nframes_t read ( sample_t *buf, int channel, nframes_t len ) = 0;
virtual nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t end ) = 0;
virtual nframes_t write ( sample_t *buf, nframes_t len ) = 0;
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bool read_peaks( float fpp, nframes_t start, nframes_t end, int *peaks, Peak **pbuf, int *channels );
};