lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     This file copyright 2006 Chris Cannam.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #ifndef _CODED_AUDIO_FILE_READER_H_
lbajardsilogic@0: #define _CODED_AUDIO_FILE_READER_H_
lbajardsilogic@0: 
lbajardsilogic@0: #include "AudioFileReader.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include <sndfile.h>
lbajardsilogic@0: 
lbajardsilogic@0: class WavFileReader;
lbajardsilogic@0: 
lbajardsilogic@0: class CodedAudioFileReader : public AudioFileReader
lbajardsilogic@0: {
lbajardsilogic@0: public:
lbajardsilogic@0:     virtual ~CodedAudioFileReader();
lbajardsilogic@0: 
lbajardsilogic@0:     enum CacheMode {
lbajardsilogic@0:         CacheInTemporaryFile,
lbajardsilogic@0:         CacheInMemory
lbajardsilogic@0:     };
lbajardsilogic@0: 
lbajardsilogic@0:     virtual void getInterleavedFrames(size_t start, size_t count,
lbajardsilogic@0: 				      SampleBlock &frames) const;
lbajardsilogic@0: 
lbajardsilogic@0: protected:
lbajardsilogic@0:     CodedAudioFileReader(CacheMode cacheMode);
lbajardsilogic@0: 
lbajardsilogic@0:     void initialiseDecodeCache(); // samplerate, channels must have been set
lbajardsilogic@0:     void addSampleToDecodeCache(float sample);
lbajardsilogic@0:     void finishDecodeCache();
lbajardsilogic@0:     bool isDecodeCacheInitialised() const { return m_initialised; }
lbajardsilogic@0: 
lbajardsilogic@0:     CacheMode m_cacheMode;
lbajardsilogic@0:     SampleBlock m_data;
lbajardsilogic@0:     bool m_initialised;
lbajardsilogic@0: 
lbajardsilogic@0:     QString m_cacheFileName;
lbajardsilogic@0:     SNDFILE *m_cacheFileWritePtr;
lbajardsilogic@0:     WavFileReader *m_cacheFileReader;
lbajardsilogic@0:     float *m_cacheWriteBuffer;
lbajardsilogic@0:     size_t m_cacheWriteBufferIndex;
lbajardsilogic@0:     size_t m_cacheWriteBufferSize; // frames
lbajardsilogic@0: };
lbajardsilogic@0: 
lbajardsilogic@0: #endif