Mercurial > hg > svcore
view data/fileio/CodedAudioFileReader.h @ 1306:b325e91505b5 mp3-gapless
Refactor in CodedAudioFileReader in preparation for trimming at end
author | Chris Cannam |
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date | Tue, 29 Nov 2016 12:06:49 +0000 |
parents | 9f9f55a8af92 |
children | c84629395040 |
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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 }; enum DecodeMode { DecodeAtOnce, // decode the file on construction, with progress DecodeThreaded // decode in a background thread after construction }; virtual std::vector<float> 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 // compensation for encoder delays: void setSamplesToTrim(sv_frame_t fromStart, sv_frame_t fromEnd); // may throw InsufficientDiscSpace: void addSamplesToDecodeCache(float **samples, sv_frame_t nframes); void addSamplesToDecodeCache(float *samplesInterleaved, sv_frame_t nframes); void addSamplesToDecodeCache(const std::vector<float> &interleaved); // may throw InsufficientDiscSpace: void finishDecodeCache(); bool isDecodeCacheInitialised() const { return m_initialised; } void startSerialised(QString id); void endSerialised(); private: void pushCacheWriteBufferMaybe(bool final); sv_frame_t pushBuffer(float *interleaved, sv_frame_t sz, bool final); // to be called only by pushBuffer void pushBufferResampling(float *interleaved, sv_frame_t sz, double ratio, bool final); // to be called only by pushBuffer and pushBufferResampling void pushBufferNonResampling(float *interleaved, sv_frame_t sz); protected: QMutex m_cacheMutex; CacheMode m_cacheMode; std::vector<float> m_data; mutable QMutex 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; sv_frame_t m_trimFromStart; sv_frame_t m_trimFromEnd; sv_frame_t m_clippedCount; sv_frame_t m_firstNonzero; sv_frame_t m_lastNonzero; }; #endif