Mercurial > hg > sonic-visualiser
view audioio/AudioGenerator.h @ 148:0c22273a1d8c
* Enable threaded decoding for Ogg and MP3 files.
Needs some work on reducing updates to the overview widget
author | Chris Cannam |
---|---|
date | Wed, 06 Jun 2007 16:24:55 +0000 |
parents | cd5d7ff8ef38 |
children | 98ba77e0d897 |
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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 _AUDIO_GENERATOR_H_ #define _AUDIO_GENERATOR_H_ class Model; class NoteModel; class DenseTimeValueModel; class SparseOneDimensionalModel; class RealTimePluginInstance; #include <QObject> #include <QMutex> #include <set> #include <map> class AudioGenerator : public QObject { Q_OBJECT public: AudioGenerator(); virtual ~AudioGenerator(); /** * Return true if the given model is of a type that we generally * know how to play. This doesn't guarantee that a specific * AudioGenerator will actually produce sounds for it (for * example, it may turn out that a vital plugin is missing). */ static bool canPlay(const Model *model); static QString getDefaultPlayPluginId(const Model *model); static QString getDefaultPlayPluginConfiguration(const Model *model); /** * Add a data model to be played from and initialise any necessary * audio generation code. Returns true if the model will be * played. (The return value test here is stricter than that for * canPlay, above.) The model will be added regardless of the * return value. */ virtual bool addModel(Model *model); /** * Remove a model. */ virtual void removeModel(Model *model); /** * Remove all models. */ virtual void clearModels(); /** * Reset playback, clearing plugins and the like. */ virtual void reset(); /** * Set the target channel count. The buffer parameter to mixModel * must always point to at least this number of arrays. */ virtual void setTargetChannelCount(size_t channelCount); /** * Return the internal processing block size. The frameCount * argument to all mixModel calls must be a multiple of this * value. */ virtual size_t getBlockSize() const; /** * Mix a single model into an output buffer. */ virtual size_t mixModel(Model *model, size_t startFrame, size_t frameCount, float **buffer, size_t fadeIn = 0, size_t fadeOut = 0); protected slots: void playPluginIdChanged(const Model *, QString); void playPluginConfigurationChanged(const Model *, QString); protected: size_t m_sourceSampleRate; size_t m_targetChannelCount; struct NoteOff { int pitch; size_t frame; struct Comparator { bool operator()(const NoteOff &n1, const NoteOff &n2) const { return n1.frame < n2.frame; } }; }; typedef std::map<const Model *, RealTimePluginInstance *> PluginMap; typedef std::set<NoteOff, NoteOff::Comparator> NoteOffSet; typedef std::map<const Model *, NoteOffSet> NoteOffMap; QMutex m_mutex; PluginMap m_synthMap; NoteOffMap m_noteOffs; static QString m_sampleDir; virtual RealTimePluginInstance *loadPluginFor(const Model *model); virtual RealTimePluginInstance *loadPlugin(QString id, QString program); static QString getSampleDir(); static void setSampleDir(RealTimePluginInstance *plugin); virtual size_t mixDenseTimeValueModel (DenseTimeValueModel *model, size_t startFrame, size_t frameCount, float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut); virtual size_t mixSparseOneDimensionalModel (SparseOneDimensionalModel *model, size_t startFrame, size_t frameCount, float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut); virtual size_t mixNoteModel (NoteModel *model, size_t startFrame, size_t frameCount, float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut); static const size_t m_pluginBlockSize; }; #endif