annotate data/fileio/CodedAudioFileReader.h @ 228:f02989f7e160

...
author Chris Cannam
date Mon, 12 Feb 2007 13:09:31 +0000
parents 1a42221a1522
children 71dfc6ab3b54
rev   line source
Chris@148 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@148 2
Chris@148 3 /*
Chris@148 4 Sonic Visualiser
Chris@148 5 An audio file viewer and annotation editor.
Chris@148 6 Centre for Digital Music, Queen Mary, University of London.
Chris@148 7 This file copyright 2006 Chris Cannam.
Chris@148 8
Chris@148 9 This program is free software; you can redistribute it and/or
Chris@148 10 modify it under the terms of the GNU General Public License as
Chris@148 11 published by the Free Software Foundation; either version 2 of the
Chris@148 12 License, or (at your option) any later version. See the file
Chris@148 13 COPYING included with this distribution for more information.
Chris@148 14 */
Chris@148 15
Chris@148 16 #ifndef _CODED_AUDIO_FILE_READER_H_
Chris@148 17 #define _CODED_AUDIO_FILE_READER_H_
Chris@148 18
Chris@148 19 #include "AudioFileReader.h"
Chris@148 20
Chris@148 21 #include <sndfile.h>
Chris@148 22
Chris@148 23 class WavFileReader;
Chris@148 24
Chris@148 25 class CodedAudioFileReader : public AudioFileReader
Chris@148 26 {
Chris@148 27 public:
Chris@148 28 virtual ~CodedAudioFileReader();
Chris@148 29
Chris@148 30 enum CacheMode {
Chris@148 31 CacheInTemporaryFile,
Chris@148 32 CacheInMemory
Chris@148 33 };
Chris@148 34
Chris@148 35 virtual void getInterleavedFrames(size_t start, size_t count,
Chris@148 36 SampleBlock &frames) const;
Chris@148 37
Chris@148 38 protected:
Chris@148 39 CodedAudioFileReader(CacheMode cacheMode);
Chris@148 40
Chris@148 41 void initialiseDecodeCache(); // samplerate, channels must have been set
Chris@148 42 void addSampleToDecodeCache(float sample);
Chris@148 43 void finishDecodeCache();
Chris@148 44 bool isDecodeCacheInitialised() const { return m_initialised; }
Chris@148 45
Chris@148 46 CacheMode m_cacheMode;
Chris@148 47 SampleBlock m_data;
Chris@148 48 bool m_initialised;
Chris@148 49
Chris@148 50 QString m_cacheFileName;
Chris@148 51 SNDFILE *m_cacheFileWritePtr;
Chris@148 52 WavFileReader *m_cacheFileReader;
Chris@148 53 float *m_cacheWriteBuffer;
Chris@148 54 size_t m_cacheWriteBufferIndex;
Chris@148 55 size_t m_cacheWriteBufferSize; // frames
Chris@148 56 };
Chris@148 57
Chris@148 58 #endif