102 lines
3.4 KiB
C++
102 lines
3.4 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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#pragma once
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/* Base class for all audio file library interfaces */
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#include <stdlib.h>
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#include "types.h"
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#include "Peaks.H"
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#include <string>
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#include <map>
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#include <list>
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class Peak_Writer;
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class Audio_File
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{
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static std::map <std::string, Audio_File*> _open_files;
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Audio_File ( const Audio_File &rhs );
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const Audio_File & operator= ( const Audio_File &rhs );
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protected:
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struct format_desc
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{
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const char *name;
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const char *extension;
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unsigned long id;
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};
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const char *_filename;
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nframes_t _length; /* length of file in samples */
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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;
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static const format_desc *
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find_format ( const format_desc *fd, const char *name )
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{
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for ( ; fd->name; ++fd )
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if ( ! strcmp( fd->name, name ) )
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return fd;
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return NULL;
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}
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public:
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Audio_File ( )
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{
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_filename = NULL;
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_length = _channels = 0;
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}
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virtual ~Audio_File ( );
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static void all_supported_formats ( std::list <const char *> &formats );
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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; }
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nframes_t length ( void ) const { return _length; }
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int channels ( void ) const { return _channels; }
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nframes_t samplerate ( void ) const { return _samplerate; }
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// Peaks const * peaks ( void ) { return &_peaks; }
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virtual bool open ( void ) = 0;
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virtual void close ( void ) = 0;
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virtual void seek ( nframes_t offset ) = 0;
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virtual nframes_t read ( sample_t *buf, int channel, nframes_t len ) = 0;
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virtual nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t end ) = 0;
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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 );
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};
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