Chris@148: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@148: 
Chris@148: /*
Chris@148:     Sonic Visualiser
Chris@148:     An audio file viewer and annotation editor.
Chris@148:     Centre for Digital Music, Queen Mary, University of London.
Chris@148:     This file copyright 2006 Chris Cannam.
Chris@148:     
Chris@148:     This program is free software; you can redistribute it and/or
Chris@148:     modify it under the terms of the GNU General Public License as
Chris@148:     published by the Free Software Foundation; either version 2 of the
Chris@148:     License, or (at your option) any later version.  See the file
Chris@148:     COPYING included with this distribution for more information.
Chris@148: */
Chris@148: 
Chris@148: #ifndef _CODED_AUDIO_FILE_READER_H_
Chris@148: #define _CODED_AUDIO_FILE_READER_H_
Chris@148: 
Chris@148: #include "AudioFileReader.h"
Chris@148: 
Chris@148: #include <sndfile.h>
Chris@263: #include <QMutex>
Chris@543: #include <QReadWriteLock>
Chris@148: 
Chris@148: class WavFileReader;
Chris@297: class Serialiser;
Chris@297: class Resampler;
Chris@148: 
Chris@148: class CodedAudioFileReader : public AudioFileReader
Chris@148: {
Chris@357:     Q_OBJECT
Chris@357: 
Chris@148: public:
Chris@148:     virtual ~CodedAudioFileReader();
Chris@148: 
Chris@148:     enum CacheMode {
Chris@148:         CacheInTemporaryFile,
Chris@148:         CacheInMemory
Chris@148:     };
Chris@148: 
Chris@148:     virtual void getInterleavedFrames(size_t start, size_t count,
Chris@148: 				      SampleBlock &frames) const;
Chris@148: 
Chris@297:     virtual size_t getNativeRate() const { return m_fileRate; }
Chris@297: 
Chris@357: signals:
Chris@357:     void progress(int);
Chris@357: 
Chris@148: protected:
Chris@297:     CodedAudioFileReader(CacheMode cacheMode, size_t targetRate);
Chris@148: 
Chris@148:     void initialiseDecodeCache(); // samplerate, channels must have been set
Chris@544: 
Chris@544:     // may throw InsufficientDiscSpace:
Chris@297:     void addSamplesToDecodeCache(float **samples, size_t nframes);
Chris@297:     void addSamplesToDecodeCache(float *samplesInterleaved, size_t nframes);
Chris@297:     void addSamplesToDecodeCache(const SampleBlock &interleaved);
Chris@544: 
Chris@544:     // may throw InsufficientDiscSpace:
Chris@148:     void finishDecodeCache();
Chris@544: 
Chris@148:     bool isDecodeCacheInitialised() const { return m_initialised; }
Chris@148: 
Chris@297:     void startSerialised(QString id);
Chris@297:     void endSerialised();
Chris@297: 
Chris@297: private:
Chris@297:     void pushBuffer(float *interleaved, size_t sz, bool final);
Chris@758:     void pushBufferResampling(float *interleaved, size_t sz, float ratio, bool final);
Chris@758:     void pushBufferNonResampling(float *interleaved, size_t sz);
Chris@297: 
Chris@297: protected:
Chris@263:     QMutex m_cacheMutex;
Chris@148:     CacheMode m_cacheMode;
Chris@148:     SampleBlock m_data;
Chris@543:     mutable QReadWriteLock m_dataLock;
Chris@148:     bool m_initialised;
Chris@297:     Serialiser *m_serialiser;
Chris@297:     size_t m_fileRate;
Chris@148: 
Chris@290:     QString m_cacheFileName;
Chris@148:     SNDFILE *m_cacheFileWritePtr;
Chris@148:     WavFileReader *m_cacheFileReader;
Chris@148:     float *m_cacheWriteBuffer;
Chris@148:     size_t m_cacheWriteBufferIndex;
Chris@148:     size_t m_cacheWriteBufferSize; // frames
Chris@297: 
Chris@297:     Resampler *m_resampler;
Chris@297:     float *m_resampleBuffer;
Chris@757:     size_t m_fileFrameCount;
Chris@148: };
Chris@148: 
Chris@148: #endif