diff audio/AudioGenerator.h @ 468:56acd9368532 bqaudioio

Initial work toward switching to bqaudioio library (so as to get I/O, not just O)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio/AudioGenerator.h	Tue Aug 04 13:27:42 2015 +0100
@@ -0,0 +1,168 @@
+/* -*- 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 FlexiNoteModel;
+class DenseTimeValueModel;
+class SparseOneDimensionalModel;
+class Playable;
+class ClipMixer;
+class ContinuousSynth;
+
+#include <QObject>
+#include <QMutex>
+
+#include <set>
+#include <map>
+#include <vector>
+
+#include "base/BaseTypes.h"
+
+class AudioGenerator : public QObject
+{
+    Q_OBJECT
+
+public:
+    AudioGenerator();
+    virtual ~AudioGenerator();
+
+    /**
+     * Add a data model to be played from and initialise any necessary
+     * audio generation code.  Returns true if the model will be
+     * played.  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 buffers 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(int channelCount);
+
+    /**
+     * Return the internal processing block size.  The frameCount
+     * argument to all mixModel calls must be a multiple of this
+     * value.
+     */
+    virtual sv_frame_t getBlockSize() const;
+
+    /**
+     * Mix a single model into an output buffer.
+     */
+    virtual sv_frame_t mixModel(Model *model, sv_frame_t startFrame, sv_frame_t frameCount,
+			    float **buffer, sv_frame_t fadeIn = 0, sv_frame_t fadeOut = 0);
+
+    /**
+     * Specify that only the given set of models should be played.
+     */
+    virtual void setSoloModelSet(std::set<Model *>s);
+
+    /**
+     * Specify that all models should be played as normal (if not
+     * muted).
+     */
+    virtual void clearSoloModelSet();
+
+protected slots:
+    void playClipIdChanged(const Playable *, QString);
+
+protected:
+    sv_samplerate_t m_sourceSampleRate;
+    int m_targetChannelCount;
+    int m_waveType;
+
+    bool m_soloing;
+    std::set<Model *> m_soloModelSet;
+
+    struct NoteOff {
+
+        NoteOff(float _freq, sv_frame_t _frame) : frequency(_freq), frame(_frame) { }
+
+        float frequency;
+	sv_frame_t frame;
+
+	struct Comparator {
+	    bool operator()(const NoteOff &n1, const NoteOff &n2) const {
+		return n1.frame < n2.frame;
+	    }
+	};
+    };
+
+
+    typedef std::map<const Model *, ClipMixer *> ClipMixerMap;
+
+    typedef std::multiset<NoteOff, NoteOff::Comparator> NoteOffSet;
+    typedef std::map<const Model *, NoteOffSet> NoteOffMap;
+
+    typedef std::map<const Model *, ContinuousSynth *> ContinuousSynthMap;
+
+    QMutex m_mutex;
+
+    ClipMixerMap m_clipMixerMap;
+    NoteOffMap m_noteOffs;
+    static QString m_sampleDir;
+
+    ContinuousSynthMap m_continuousSynthMap;
+
+    bool usesClipMixer(const Model *);
+    bool wantsQuieterClips(const Model *);
+    bool usesContinuousSynth(const Model *);
+
+    ClipMixer *makeClipMixerFor(const Model *model);
+    ContinuousSynth *makeSynthFor(const Model *model);
+
+    static void initialiseSampleDir();
+
+    virtual sv_frame_t mixDenseTimeValueModel
+    (DenseTimeValueModel *model, sv_frame_t startFrame, sv_frame_t frameCount,
+     float **buffer, float gain, float pan, sv_frame_t fadeIn, sv_frame_t fadeOut);
+
+    virtual sv_frame_t mixClipModel
+    (Model *model, sv_frame_t startFrame, sv_frame_t frameCount,
+     float **buffer, float gain, float pan);
+
+    virtual sv_frame_t mixContinuousSynthModel
+    (Model *model, sv_frame_t startFrame, sv_frame_t frameCount,
+     float **buffer, float gain, float pan);
+    
+    static const sv_frame_t m_processingBlockSize;
+
+    float **m_channelBuffer;
+    sv_frame_t m_channelBufSiz;
+    int m_channelBufCount;
+};
+
+#endif
+