diff data/fileio/CodedAudioFileReader.h @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/fileio/CodedAudioFileReader.h	Fri May 11 09:08:14 2007 +0000
@@ -0,0 +1,58 @@
+/* -*- 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>
+
+class WavFileReader;
+
+class CodedAudioFileReader : public AudioFileReader
+{
+public:
+    virtual ~CodedAudioFileReader();
+
+    enum CacheMode {
+        CacheInTemporaryFile,
+        CacheInMemory
+    };
+
+    virtual void getInterleavedFrames(size_t start, size_t count,
+				      SampleBlock &frames) const;
+
+protected:
+    CodedAudioFileReader(CacheMode cacheMode);
+
+    void initialiseDecodeCache(); // samplerate, channels must have been set
+    void addSampleToDecodeCache(float sample);
+    void finishDecodeCache();
+    bool isDecodeCacheInitialised() const { return m_initialised; }
+
+    CacheMode m_cacheMode;
+    SampleBlock m_data;
+    bool m_initialised;
+
+    QString m_cacheFileName;
+    SNDFILE *m_cacheFileWritePtr;
+    WavFileReader *m_cacheFileReader;
+    float *m_cacheWriteBuffer;
+    size_t m_cacheWriteBufferIndex;
+    size_t m_cacheWriteBufferSize; // frames
+};
+
+#endif