AudioGenerator.h

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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();

    static bool canPlay(const Model *model);

    static QString getDefaultPlayPluginId(const Model *model);
    static QString getDefaultPlayPluginConfiguration(const Model *model);

    virtual bool addModel(Model *model);

    virtual void removeModel(Model *model);

    virtual void clearModels();

    virtual void reset();

    virtual void setTargetChannelCount(size_t channelCount);

    virtual size_t getBlockSize() const;

    virtual size_t mixModel(Model *model, size_t startFrame, size_t frameCount,
                            float **buffer, size_t fadeIn = 0, size_t fadeOut = 0);

    virtual void setSoloModelSet(std::set<Model *>s);

    virtual void clearSoloModelSet();

protected slots:
    void playPluginIdChanged(const Model *, QString);
    void playPluginConfigurationChanged(const Model *, QString);

protected:
    size_t       m_sourceSampleRate;
    size_t       m_targetChannelCount;

    bool m_soloing;
    std::set<Model *> m_soloModelSet;

    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

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