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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2006 Chris Cannam.
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. See the file
COPYING included with this distribution for more information.
*/
#ifndef _CODED_AUDIO_FILE_READER_H_
#define _CODED_AUDIO_FILE_READER_H_
#include "AudioFileReader.h"
#include <sndfile.h>
#include <QMutex>
#include <QReadWriteLock>
class WavFileReader;
class Serialiser;
class Resampler;
class CodedAudioFileReader : public AudioFileReader
{
Q_OBJECT
public:
virtual ~CodedAudioFileReader();
enum CacheMode {
CacheInTemporaryFile,
CacheInMemory
};
virtual SampleBlock getInterleavedFrames(sv_frame_t start, sv_frame_t count) const;
virtual sv_samplerate_t getNativeRate() const { return m_fileRate; }
virtual QString getLocalFilename() const { return m_cacheFileName; }
/// Intermediate cache means all CodedAudioFileReaders are quickly seekable
virtual bool isQuicklySeekable() const { return true; }
signals:
void progress(int);
protected:
CodedAudioFileReader(CacheMode cacheMode,
sv_samplerate_t targetRate,
bool normalised);
void initialiseDecodeCache(); // samplerate, channels must have been set
// may throw InsufficientDiscSpace:
void addSamplesToDecodeCache(float **samples, sv_frame_t nframes);
void addSamplesToDecodeCache(float *samplesInterleaved, sv_frame_t nframes);
void addSamplesToDecodeCache(const SampleBlock &interleaved);
// may throw InsufficientDiscSpace:
void finishDecodeCache();
bool isDecodeCacheInitialised() const { return m_initialised; }
void startSerialised(QString id);
void endSerialised();
private:
void pushBuffer(float *interleaved, sv_frame_t sz, bool final);
void pushBufferResampling(float *interleaved, sv_frame_t sz, double ratio, bool final);
void pushBufferNonResampling(float *interleaved, sv_frame_t sz);
protected:
QMutex m_cacheMutex;
CacheMode m_cacheMode;
SampleBlock m_data;
mutable QReadWriteLock m_dataLock;
bool m_initialised;
Serialiser *m_serialiser;
sv_samplerate_t m_fileRate;
QString m_cacheFileName;
SNDFILE *m_cacheFileWritePtr;
WavFileReader *m_cacheFileReader;
float *m_cacheWriteBuffer;
sv_frame_t m_cacheWriteBufferIndex;
sv_frame_t m_cacheWriteBufferSize; // frames
Resampler *m_resampler;
float *m_resampleBuffer;
sv_frame_t m_fileFrameCount;
bool m_normalised;
float m_max;
float m_gain;
};
#endif
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