Chris@19: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@21:     Sonic Visualiser
Chris@21:     An audio file viewer and annotation editor.
Chris@21:     Centre for Digital Music, Queen Mary, University of London.
Chris@21:     This file copyright 2006 Chris Cannam.
Chris@0:     
Chris@21:     This program is free software; you can redistribute it and/or
Chris@21:     modify it under the terms of the GNU General Public License as
Chris@21:     published by the Free Software Foundation; either version 2 of the
Chris@21:     License, or (at your option) any later version.  See the file
Chris@21:     COPYING included with this distribution for more information.
Chris@0: */
Chris@0: 
Chris@0: #ifndef _AUDIO_GENERATOR_H_
Chris@0: #define _AUDIO_GENERATOR_H_
Chris@0: 
Chris@0: class Model;
Chris@0: class ViewManager;
Chris@11: class NoteModel;
Chris@0: class DenseTimeValueModel;
Chris@0: class SparseOneDimensionalModel;
Chris@0: class RealTimePluginInstance;
Chris@0: 
Chris@22: #include <QObject>
Chris@8: #include <QMutex>
Chris@8: 
Chris@0: #include <set>
Chris@0: #include <map>
Chris@0: 
Chris@22: class AudioGenerator : public QObject
Chris@0: {
Chris@22:     Q_OBJECT
Chris@22: 
Chris@0: public:
Chris@0:     AudioGenerator(ViewManager *);
Chris@0:     virtual ~AudioGenerator();
Chris@0: 
Chris@0:     /**
Chris@13:      * Return true if the given model is of a type that we generally
Chris@13:      * know how to play.  This doesn't guarantee that a specific
Chris@13:      * AudioGenerator will actually produce sounds for it (for
Chris@13:      * example, it may turn out that a vital plugin is missing).
Chris@13:      */
Chris@13:     static bool canPlay(const Model *model);
Chris@13: 
Chris@22:     static QString getDefaultPlayPluginId(const Model *model);
Chris@22:     static QString getDefaultPlayPluginConfiguration(const Model *model);
Chris@22: 
Chris@13:     /**
Chris@13:      * Add a data model to be played from and initialise any necessary
Chris@13:      * audio generation code.  Returns true if the model will be
Chris@13:      * played.  (The return value test here is stricter than that for
Chris@13:      * canPlay, above.)  The model will be added regardless of the
Chris@13:      * return value.
Chris@0:      */
Chris@10:     virtual bool addModel(Model *model);
Chris@0: 
Chris@0:     /**
Chris@0:      * Remove a model.
Chris@0:      */
Chris@0:     virtual void removeModel(Model *model);
Chris@0: 
Chris@0:     /**
Chris@0:      * Remove all models.
Chris@0:      */
Chris@0:     virtual void clearModels();
Chris@0: 
Chris@0:     /**
Chris@0:      * Reset playback, clearing plugins and the like.
Chris@0:      */
Chris@0:     virtual void reset();
Chris@0: 
Chris@0:     /**
Chris@0:      * Set the target channel count.  The buffer parameter to mixModel
Chris@0:      * must always point to at least this number of arrays.
Chris@0:      */
Chris@0:     virtual void setTargetChannelCount(size_t channelCount);
Chris@0: 
Chris@0:     /**
Chris@0:      * Return the internal processing block size.  The frameCount
Chris@0:      * argument to all mixModel calls must be a multiple of this
Chris@0:      * value.
Chris@0:      */
Chris@0:     virtual size_t getBlockSize() const;
Chris@0: 
Chris@0:     /**
Chris@0:      * Mix a single model into an output buffer.
Chris@0:      */
Chris@0:     virtual size_t mixModel(Model *model, size_t startFrame, size_t frameCount,
Chris@4: 			    float **buffer, size_t fadeIn = 0, size_t fadeOut = 0);
Chris@0: 
Chris@22: protected slots:
Chris@22:     void playPluginIdChanged(const Model *, QString);
Chris@22:     void playPluginConfigurationChanged(const Model *, QString);
Chris@22: 
Chris@0: protected:
Chris@0:     ViewManager *m_viewManager;
Chris@0:     size_t       m_sourceSampleRate;
Chris@0:     size_t       m_targetChannelCount;
Chris@0: 
Chris@0:     struct NoteOff {
Chris@0: 
Chris@0: 	int pitch;
Chris@0: 	size_t frame;
Chris@0: 
Chris@0: 	struct Comparator {
Chris@0: 	    bool operator()(const NoteOff &n1, const NoteOff &n2) const {
Chris@0: 		return n1.frame < n2.frame;
Chris@0: 	    }
Chris@0: 	};
Chris@0:     };
Chris@0: 
Chris@22:     typedef std::map<const Model *, RealTimePluginInstance *> PluginMap;
Chris@0: 
Chris@0:     typedef std::set<NoteOff, NoteOff::Comparator> NoteOffSet;
Chris@22:     typedef std::map<const Model *, NoteOffSet> NoteOffMap;
Chris@0: 
Chris@8:     QMutex m_mutex;
Chris@0:     PluginMap m_synthMap;
Chris@0:     NoteOffMap m_noteOffs;
Chris@0: 
Chris@22:     virtual RealTimePluginInstance *loadPluginFor(const Model *model);
Chris@11:     virtual RealTimePluginInstance *loadPlugin(QString id, QString program);
Chris@11: 
Chris@0:     virtual size_t mixDenseTimeValueModel
Chris@0:     (DenseTimeValueModel *model, size_t startFrame, size_t frameCount,
Chris@4:      float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut);
Chris@0: 
Chris@0:     virtual size_t mixSparseOneDimensionalModel
Chris@0:     (SparseOneDimensionalModel *model, size_t startFrame, size_t frameCount,
Chris@4:      float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut);
Chris@0: 
Chris@11:     virtual size_t mixNoteModel
Chris@11:     (NoteModel *model, size_t startFrame, size_t frameCount,
Chris@11:      float **buffer, float gain, float pan, size_t fadeIn, size_t fadeOut);
Chris@11: 
Chris@0:     static const size_t m_pluginBlockSize;
Chris@0: };
Chris@0: 
Chris@0: #endif
Chris@0: