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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2006 Chris Cannam.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #ifndef _CODED_AUDIO_FILE_READER_H_
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17 #define _CODED_AUDIO_FILE_READER_H_
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18
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19 #include "AudioFileReader.h"
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20
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21 #include <sndfile.h>
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22 #include <QMutex>
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23
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24 class WavFileReader;
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25
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26 class CodedAudioFileReader : public AudioFileReader
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27 {
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28 public:
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29 virtual ~CodedAudioFileReader();
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30
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31 enum CacheMode {
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32 CacheInTemporaryFile,
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33 CacheInMemory
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34 };
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35
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36 virtual void getInterleavedFrames(size_t start, size_t count,
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37 SampleBlock &frames) const;
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38
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39 protected:
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40 CodedAudioFileReader(CacheMode cacheMode);
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41
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42 void initialiseDecodeCache(); // samplerate, channels must have been set
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43 void addSampleToDecodeCache(float sample);
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44 void finishDecodeCache();
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45 bool isDecodeCacheInitialised() const { return m_initialised; }
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46
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47 QMutex m_cacheMutex;
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48 CacheMode m_cacheMode;
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49 SampleBlock m_data;
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50 bool m_initialised;
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51
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52 QString m_cacheFileName;
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53 SNDFILE *m_cacheFileWritePtr;
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54 WavFileReader *m_cacheFileReader;
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55 float *m_cacheWriteBuffer;
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56 size_t m_cacheWriteBufferIndex;
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57 size_t m_cacheWriteBufferSize; // frames
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58 };
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59
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60 #endif
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