diff audio/AudioGenerator.cpp @ 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.cpp	Tue Aug 04 13:27:42 2015 +0100
@@ -0,0 +1,709 @@
+/* -*- 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.
+*/
+
+#include "AudioGenerator.h"
+
+#include "base/TempDirectory.h"
+#include "base/PlayParameters.h"
+#include "base/PlayParameterRepository.h"
+#include "base/Pitch.h"
+#include "base/Exceptions.h"
+
+#include "data/model/NoteModel.h"
+#include "data/model/FlexiNoteModel.h"
+#include "data/model/DenseTimeValueModel.h"
+#include "data/model/SparseTimeValueModel.h"
+#include "data/model/SparseOneDimensionalModel.h"
+#include "data/model/NoteData.h"
+
+#include "ClipMixer.h"
+#include "ContinuousSynth.h"
+
+#include <iostream>
+#include <cmath>
+
+#include <QDir>
+#include <QFile>
+
+const sv_frame_t
+AudioGenerator::m_processingBlockSize = 1024;
+
+QString
+AudioGenerator::m_sampleDir = "";
+
+//#define DEBUG_AUDIO_GENERATOR 1
+
+AudioGenerator::AudioGenerator() :
+    m_sourceSampleRate(0),
+    m_targetChannelCount(1),
+    m_waveType(0),
+    m_soloing(false),
+    m_channelBuffer(0),
+    m_channelBufSiz(0),
+    m_channelBufCount(0)
+{
+    initialiseSampleDir();
+
+    connect(PlayParameterRepository::getInstance(),
+            SIGNAL(playClipIdChanged(const Playable *, QString)),
+            this,
+            SLOT(playClipIdChanged(const Playable *, QString)));
+}
+
+AudioGenerator::~AudioGenerator()
+{
+#ifdef DEBUG_AUDIO_GENERATOR
+    SVDEBUG << "AudioGenerator::~AudioGenerator" << endl;
+#endif
+}
+
+void
+AudioGenerator::initialiseSampleDir()
+{
+    if (m_sampleDir != "") return;
+
+    try {
+        m_sampleDir = TempDirectory::getInstance()->getSubDirectoryPath("samples");
+    } catch (DirectoryCreationFailed f) {
+        cerr << "WARNING: AudioGenerator::initialiseSampleDir:"
+                  << " Failed to create temporary sample directory"
+                  << endl;
+        m_sampleDir = "";
+        return;
+    }
+
+    QDir sampleResourceDir(":/samples", "*.wav");
+
+    for (unsigned int i = 0; i < sampleResourceDir.count(); ++i) {
+
+        QString fileName(sampleResourceDir[i]);
+        QFile file(sampleResourceDir.filePath(fileName));
+        QString target = QDir(m_sampleDir).filePath(fileName);
+
+        if (!file.copy(target)) {
+            cerr << "WARNING: AudioGenerator::getSampleDir: "
+                      << "Unable to copy " << fileName
+                      << " into temporary directory \""
+                      << m_sampleDir << "\"" << endl;
+        } else {
+            QFile tf(target);
+            tf.setPermissions(tf.permissions() |
+                              QFile::WriteOwner |
+                              QFile::WriteUser);
+        }
+    }
+}
+
+bool
+AudioGenerator::addModel(Model *model)
+{
+    if (m_sourceSampleRate == 0) {
+
+	m_sourceSampleRate = model->getSampleRate();
+
+    } else {
+
+	DenseTimeValueModel *dtvm =
+	    dynamic_cast<DenseTimeValueModel *>(model);
+
+	if (dtvm) {
+	    m_sourceSampleRate = model->getSampleRate();
+	    return true;
+	}
+    }
+
+    const Playable *playable = model;
+    if (!playable || !playable->canPlay()) return 0;
+
+    PlayParameters *parameters =
+	PlayParameterRepository::getInstance()->getPlayParameters(playable);
+
+    bool willPlay = !parameters->isPlayMuted();
+    
+    if (usesClipMixer(model)) {
+        ClipMixer *mixer = makeClipMixerFor(model);
+        if (mixer) {
+            QMutexLocker locker(&m_mutex);
+            m_clipMixerMap[model] = mixer;
+            return willPlay;
+        }
+    }
+
+    if (usesContinuousSynth(model)) {
+        ContinuousSynth *synth = makeSynthFor(model);
+        if (synth) {
+            QMutexLocker locker(&m_mutex);
+            m_continuousSynthMap[model] = synth;
+            return willPlay;
+        }
+    }
+
+    return false;
+}
+
+void
+AudioGenerator::playClipIdChanged(const Playable *playable, QString)
+{
+    const Model *model = dynamic_cast<const Model *>(playable);
+    if (!model) {
+        cerr << "WARNING: AudioGenerator::playClipIdChanged: playable "
+                  << playable << " is not a supported model type"
+                  << endl;
+        return;
+    }
+
+    if (m_clipMixerMap.find(model) == m_clipMixerMap.end()) return;
+
+    ClipMixer *mixer = makeClipMixerFor(model);
+    if (mixer) {
+        QMutexLocker locker(&m_mutex);
+        m_clipMixerMap[model] = mixer;
+    }
+}
+
+bool
+AudioGenerator::usesClipMixer(const Model *model)
+{
+    bool clip = 
+        (qobject_cast<const SparseOneDimensionalModel *>(model) ||
+         qobject_cast<const NoteModel *>(model) ||
+         qobject_cast<const FlexiNoteModel *>(model));
+    return clip;
+}
+
+bool
+AudioGenerator::wantsQuieterClips(const Model *model)
+{
+    // basically, anything that usually has sustain (like notes) or
+    // often has multiple sounds at once (like notes) wants to use a
+    // quieter level than simple click tracks
+    bool does = 
+        (qobject_cast<const NoteModel *>(model) ||
+         qobject_cast<const FlexiNoteModel *>(model));
+    return does;
+}
+
+bool
+AudioGenerator::usesContinuousSynth(const Model *model)
+{
+    bool cont = 
+        (qobject_cast<const SparseTimeValueModel *>(model));
+    return cont;
+}
+
+ClipMixer *
+AudioGenerator::makeClipMixerFor(const Model *model)
+{
+    QString clipId;
+
+    const Playable *playable = model;
+    if (!playable || !playable->canPlay()) return 0;
+
+    PlayParameters *parameters =
+	PlayParameterRepository::getInstance()->getPlayParameters(playable);
+    if (parameters) {
+        clipId = parameters->getPlayClipId();
+    }
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    std::cerr << "AudioGenerator::makeClipMixerFor(" << model << "): sample id = " << clipId << std::endl;
+#endif
+
+    if (clipId == "") {
+        SVDEBUG << "AudioGenerator::makeClipMixerFor(" << model << "): no sample, skipping" << endl;
+        return 0;
+    }
+
+    ClipMixer *mixer = new ClipMixer(m_targetChannelCount,
+                                     m_sourceSampleRate,
+                                     m_processingBlockSize);
+
+    double clipF0 = Pitch::getFrequencyForPitch(60, 0, 440.0); // required
+
+    QString clipPath = QString("%1/%2.wav").arg(m_sampleDir).arg(clipId);
+
+    double level = wantsQuieterClips(model) ? 0.5 : 1.0;
+    if (!mixer->loadClipData(clipPath, clipF0, level)) {
+        delete mixer;
+        return 0;
+    }
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    std::cerr << "AudioGenerator::makeClipMixerFor(" << model << "): loaded clip " << clipId << std::endl;
+#endif
+
+    return mixer;
+}
+
+ContinuousSynth *
+AudioGenerator::makeSynthFor(const Model *model)
+{
+    const Playable *playable = model;
+    if (!playable || !playable->canPlay()) return 0;
+
+    ContinuousSynth *synth = new ContinuousSynth(m_targetChannelCount,
+                                                 m_sourceSampleRate,
+                                                 m_processingBlockSize,
+                                                 m_waveType);
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    std::cerr << "AudioGenerator::makeSynthFor(" << model << "): created synth" << std::endl;
+#endif
+
+    return synth;
+}
+
+void
+AudioGenerator::removeModel(Model *model)
+{
+    SparseOneDimensionalModel *sodm =
+	dynamic_cast<SparseOneDimensionalModel *>(model);
+    if (!sodm) return; // nothing to do
+
+    QMutexLocker locker(&m_mutex);
+
+    if (m_clipMixerMap.find(sodm) == m_clipMixerMap.end()) return;
+
+    ClipMixer *mixer = m_clipMixerMap[sodm];
+    m_clipMixerMap.erase(sodm);
+    delete mixer;
+}
+
+void
+AudioGenerator::clearModels()
+{
+    QMutexLocker locker(&m_mutex);
+
+    while (!m_clipMixerMap.empty()) {
+        ClipMixer *mixer = m_clipMixerMap.begin()->second;
+	m_clipMixerMap.erase(m_clipMixerMap.begin());
+	delete mixer;
+    }
+}    
+
+void
+AudioGenerator::reset()
+{
+    QMutexLocker locker(&m_mutex);
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    cerr << "AudioGenerator::reset()" << endl;
+#endif
+
+    for (ClipMixerMap::iterator i = m_clipMixerMap.begin(); i != m_clipMixerMap.end(); ++i) {
+	if (i->second) {
+	    i->second->reset();
+	}
+    }
+
+    m_noteOffs.clear();
+}
+
+void
+AudioGenerator::setTargetChannelCount(int targetChannelCount)
+{
+    if (m_targetChannelCount == targetChannelCount) return;
+
+//    SVDEBUG << "AudioGenerator::setTargetChannelCount(" << targetChannelCount << ")" << endl;
+
+    QMutexLocker locker(&m_mutex);
+    m_targetChannelCount = targetChannelCount;
+
+    for (ClipMixerMap::iterator i = m_clipMixerMap.begin(); i != m_clipMixerMap.end(); ++i) {
+	if (i->second) i->second->setChannelCount(targetChannelCount);
+    }
+}
+
+sv_frame_t
+AudioGenerator::getBlockSize() const
+{
+    return m_processingBlockSize;
+}
+
+void
+AudioGenerator::setSoloModelSet(std::set<Model *> s)
+{
+    QMutexLocker locker(&m_mutex);
+
+    m_soloModelSet = s;
+    m_soloing = true;
+}
+
+void
+AudioGenerator::clearSoloModelSet()
+{
+    QMutexLocker locker(&m_mutex);
+
+    m_soloModelSet.clear();
+    m_soloing = false;
+}
+
+sv_frame_t
+AudioGenerator::mixModel(Model *model, sv_frame_t startFrame, sv_frame_t frameCount,
+			 float **buffer, sv_frame_t fadeIn, sv_frame_t fadeOut)
+{
+    if (m_sourceSampleRate == 0) {
+	cerr << "WARNING: AudioGenerator::mixModel: No base source sample rate available" << endl;
+	return frameCount;
+    }
+
+    QMutexLocker locker(&m_mutex);
+
+    Playable *playable = model;
+    if (!playable || !playable->canPlay()) return frameCount;
+
+    PlayParameters *parameters =
+	PlayParameterRepository::getInstance()->getPlayParameters(playable);
+    if (!parameters) return frameCount;
+
+    bool playing = !parameters->isPlayMuted();
+    if (!playing) {
+#ifdef DEBUG_AUDIO_GENERATOR
+        cout << "AudioGenerator::mixModel(" << model << "): muted" << endl;
+#endif
+        return frameCount;
+    }
+
+    if (m_soloing) {
+        if (m_soloModelSet.find(model) == m_soloModelSet.end()) {
+#ifdef DEBUG_AUDIO_GENERATOR
+            cout << "AudioGenerator::mixModel(" << model << "): not one of the solo'd models" << endl;
+#endif
+            return frameCount;
+        }
+    }
+
+    float gain = parameters->getPlayGain();
+    float pan = parameters->getPlayPan();
+
+    DenseTimeValueModel *dtvm = dynamic_cast<DenseTimeValueModel *>(model);
+    if (dtvm) {
+	return mixDenseTimeValueModel(dtvm, startFrame, frameCount,
+				      buffer, gain, pan, fadeIn, fadeOut);
+    }
+
+    if (usesClipMixer(model)) {
+        return mixClipModel(model, startFrame, frameCount,
+                            buffer, gain, pan);
+    }
+
+    if (usesContinuousSynth(model)) {
+        return mixContinuousSynthModel(model, startFrame, frameCount,
+                                       buffer, gain, pan);
+    }
+
+    std::cerr << "AudioGenerator::mixModel: WARNING: Model " << model << " of type " << model->getTypeName() << " is marked as playable, but I have no mechanism to play it" << std::endl;
+
+    return frameCount;
+}
+
+sv_frame_t
+AudioGenerator::mixDenseTimeValueModel(DenseTimeValueModel *dtvm,
+				       sv_frame_t startFrame, sv_frame_t frames,
+				       float **buffer, float gain, float pan,
+				       sv_frame_t fadeIn, sv_frame_t fadeOut)
+{
+    sv_frame_t maxFrames = frames + std::max(fadeIn, fadeOut);
+
+    int modelChannels = dtvm->getChannelCount();
+
+    if (m_channelBufSiz < maxFrames || m_channelBufCount < modelChannels) {
+
+        for (int c = 0; c < m_channelBufCount; ++c) {
+            delete[] m_channelBuffer[c];
+        }
+
+	delete[] m_channelBuffer;
+        m_channelBuffer = new float *[modelChannels];
+
+        for (int c = 0; c < modelChannels; ++c) {
+            m_channelBuffer[c] = new float[maxFrames];
+        }
+
+        m_channelBufCount = modelChannels;
+	m_channelBufSiz = maxFrames;
+    }
+
+    sv_frame_t got = 0;
+
+    if (startFrame >= fadeIn/2) {
+        got = dtvm->getMultiChannelData(0, modelChannels - 1,
+                                        startFrame - fadeIn/2,
+                                        frames + fadeOut/2 + fadeIn/2,
+                                        m_channelBuffer);
+    } else {
+        sv_frame_t missing = fadeIn/2 - startFrame;
+
+        for (int c = 0; c < modelChannels; ++c) {
+            m_channelBuffer[c] += missing;
+        }
+
+        if (missing > 0) {
+            cerr << "note: channelBufSiz = " << m_channelBufSiz
+                 << ", frames + fadeOut/2 = " << frames + fadeOut/2 
+                 << ", startFrame = " << startFrame 
+                 << ", missing = " << missing << endl;
+        }
+
+        got = dtvm->getMultiChannelData(0, modelChannels - 1,
+                                        startFrame,
+                                        frames + fadeOut/2,
+                                        m_channelBuffer);
+
+        for (int c = 0; c < modelChannels; ++c) {
+            m_channelBuffer[c] -= missing;
+        }
+
+        got += missing;
+    }	    
+
+    for (int c = 0; c < m_targetChannelCount; ++c) {
+
+	int sourceChannel = (c % modelChannels);
+
+//	SVDEBUG << "mixing channel " << c << " from source channel " << sourceChannel << endl;
+
+	float channelGain = gain;
+	if (pan != 0.0) {
+	    if (c == 0) {
+		if (pan > 0.0) channelGain *= 1.0f - pan;
+	    } else {
+		if (pan < 0.0) channelGain *= pan + 1.0f;
+	    }
+	}
+
+	for (sv_frame_t i = 0; i < fadeIn/2; ++i) {
+	    float *back = buffer[c];
+	    back -= fadeIn/2;
+	    back[i] +=
+                (channelGain * m_channelBuffer[sourceChannel][i] * float(i))
+                / float(fadeIn);
+	}
+
+	for (sv_frame_t i = 0; i < frames + fadeOut/2; ++i) {
+	    float mult = channelGain;
+	    if (i < fadeIn/2) {
+		mult = (mult * float(i)) / float(fadeIn);
+	    }
+	    if (i > frames - fadeOut/2) {
+		mult = (mult * float((frames + fadeOut/2) - i)) / float(fadeOut);
+	    }
+            float val = m_channelBuffer[sourceChannel][i];
+            if (i >= got) val = 0.f;
+	    buffer[c][i] += mult * val;
+	}
+    }
+
+    return got;
+}
+  
+sv_frame_t
+AudioGenerator::mixClipModel(Model *model,
+                             sv_frame_t startFrame, sv_frame_t frames,
+                             float **buffer, float gain, float pan)
+{
+    ClipMixer *clipMixer = m_clipMixerMap[model];
+    if (!clipMixer) return 0;
+
+    int blocks = int(frames / m_processingBlockSize);
+    
+    //!!! todo: the below -- it matters
+
+    //!!! hang on -- the fact that the audio callback play source's
+    //buffer is a multiple of the plugin's buffer size doesn't mean
+    //that we always get called for a multiple of it here (because it
+    //also depends on the JACK block size).  how should we ensure that
+    //all models write the same amount in to the mix, and that we
+    //always have a multiple of the plugin buffer size?  I guess this
+    //class has to be queryable for the plugin buffer size & the
+    //callback play source has to use that as a multiple for all the
+    //calls to mixModel
+
+    sv_frame_t got = blocks * m_processingBlockSize;
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    cout << "mixModel [clip]: start " << startFrame << ", frames " << frames
+         << ", blocks " << blocks << ", have " << m_noteOffs.size()
+         << " note-offs" << endl;
+#endif
+
+    ClipMixer::NoteStart on;
+    ClipMixer::NoteEnd off;
+
+    NoteOffSet &noteOffs = m_noteOffs[model];
+
+    float **bufferIndexes = new float *[m_targetChannelCount];
+
+    for (int i = 0; i < blocks; ++i) {
+
+	sv_frame_t reqStart = startFrame + i * m_processingBlockSize;
+
+        NoteList notes;
+        NoteExportable *exportable = dynamic_cast<NoteExportable *>(model);
+        if (exportable) {
+            notes = exportable->getNotesWithin(reqStart,
+                                               reqStart + m_processingBlockSize);
+        }
+
+        std::vector<ClipMixer::NoteStart> starts;
+        std::vector<ClipMixer::NoteEnd> ends;
+
+	for (NoteList::const_iterator ni = notes.begin();
+             ni != notes.end(); ++ni) {
+
+	    sv_frame_t noteFrame = ni->start;
+
+	    if (noteFrame < reqStart ||
+		noteFrame >= reqStart + m_processingBlockSize) continue;
+
+	    while (noteOffs.begin() != noteOffs.end() &&
+		   noteOffs.begin()->frame <= noteFrame) {
+
+                sv_frame_t eventFrame = noteOffs.begin()->frame;
+                if (eventFrame < reqStart) eventFrame = reqStart;
+
+                off.frameOffset = eventFrame - reqStart;
+                off.frequency = noteOffs.begin()->frequency;
+
+#ifdef DEBUG_AUDIO_GENERATOR
+		cerr << "mixModel [clip]: adding note-off at frame " << eventFrame << " frame offset " << off.frameOffset << " frequency " << off.frequency << endl;
+#endif
+
+                ends.push_back(off);
+		noteOffs.erase(noteOffs.begin());
+	    }
+
+            on.frameOffset = noteFrame - reqStart;
+            on.frequency = ni->getFrequency();
+            on.level = float(ni->velocity) / 127.0f;
+            on.pan = pan;
+
+#ifdef DEBUG_AUDIO_GENERATOR
+	    cout << "mixModel [clip]: adding note at frame " << noteFrame << ", frame offset " << on.frameOffset << " frequency " << on.frequency << ", level " << on.level << endl;
+#endif
+	    
+            starts.push_back(on);
+	    noteOffs.insert
+                (NoteOff(on.frequency, noteFrame + ni->duration));
+	}
+
+	while (noteOffs.begin() != noteOffs.end() &&
+	       noteOffs.begin()->frame <= reqStart + m_processingBlockSize) {
+
+            sv_frame_t eventFrame = noteOffs.begin()->frame;
+            if (eventFrame < reqStart) eventFrame = reqStart;
+
+            off.frameOffset = eventFrame - reqStart;
+            off.frequency = noteOffs.begin()->frequency;
+
+#ifdef DEBUG_AUDIO_GENERATOR
+            cerr << "mixModel [clip]: adding leftover note-off at frame " << eventFrame << " frame offset " << off.frameOffset << " frequency " << off.frequency << endl;
+#endif
+
+            ends.push_back(off);
+            noteOffs.erase(noteOffs.begin());
+	}
+
+	for (int c = 0; c < m_targetChannelCount; ++c) {
+            bufferIndexes[c] = buffer[c] + i * m_processingBlockSize;
+        }
+
+        clipMixer->mix(bufferIndexes, gain, starts, ends);
+    }
+
+    delete[] bufferIndexes;
+
+    return got;
+}
+
+sv_frame_t
+AudioGenerator::mixContinuousSynthModel(Model *model,
+                                        sv_frame_t startFrame,
+                                        sv_frame_t frames,
+                                        float **buffer,
+                                        float gain, 
+                                        float pan)
+{
+    ContinuousSynth *synth = m_continuousSynthMap[model];
+    if (!synth) return 0;
+
+    // only type we support here at the moment
+    SparseTimeValueModel *stvm = qobject_cast<SparseTimeValueModel *>(model);
+    if (stvm->getScaleUnits() != "Hz") return 0;
+
+    int blocks = int(frames / m_processingBlockSize);
+
+    //!!! todo: see comment in mixClipModel
+
+    sv_frame_t got = blocks * m_processingBlockSize;
+
+#ifdef DEBUG_AUDIO_GENERATOR
+    cout << "mixModel [synth]: frames " << frames
+	      << ", blocks " << blocks << endl;
+#endif
+    
+    float **bufferIndexes = new float *[m_targetChannelCount];
+
+    for (int i = 0; i < blocks; ++i) {
+
+	sv_frame_t reqStart = startFrame + i * m_processingBlockSize;
+
+	for (int c = 0; c < m_targetChannelCount; ++c) {
+            bufferIndexes[c] = buffer[c] + i * m_processingBlockSize;
+        }
+
+        SparseTimeValueModel::PointList points = 
+            stvm->getPoints(reqStart, reqStart + m_processingBlockSize);
+
+        // by default, repeat last frequency
+        float f0 = 0.f;
+
+        // go straight to the last freq that is genuinely in this range
+        for (SparseTimeValueModel::PointList::const_iterator itr = points.end();
+             itr != points.begin(); ) {
+            --itr;
+            if (itr->frame >= reqStart &&
+                itr->frame < reqStart + m_processingBlockSize) {
+                f0 = itr->value;
+                break;
+            }
+        }
+
+        // if we found no such frequency and the next point is further
+        // away than twice the model resolution, go silent (same
+        // criterion TimeValueLayer uses for ending a discrete curve
+        // segment)
+        if (f0 == 0.f) {
+            SparseTimeValueModel::PointList nextPoints = 
+                stvm->getNextPoints(reqStart + m_processingBlockSize);
+            if (nextPoints.empty() ||
+                nextPoints.begin()->frame > reqStart + 2 * stvm->getResolution()) {
+                f0 = -1.f;
+            }
+        }
+
+//        cerr << "f0 = " << f0 << endl;
+
+        synth->mix(bufferIndexes,
+                   gain,
+                   pan,
+                   f0);
+    }
+
+    delete[] bufferIndexes;
+
+    return got;
+}
+