Chris@43: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@43: 
Chris@43: /*
Chris@43:     Sonic Visualiser
Chris@43:     An audio file viewer and annotation editor.
Chris@43:     Centre for Digital Music, Queen Mary, University of London.
Chris@43:     This file copyright 2006 Chris Cannam.
Chris@43:     
Chris@43:     This program is free software; you can redistribute it and/or
Chris@43:     modify it under the terms of the GNU General Public License as
Chris@43:     published by the Free Software Foundation; either version 2 of the
Chris@43:     License, or (at your option) any later version.  See the file
Chris@43:     COPYING included with this distribution for more information.
Chris@43: */
Chris@43: 
Chris@43: #include "AudioGenerator.h"
Chris@43: 
Chris@43: #include "base/TempDirectory.h"
Chris@43: #include "base/PlayParameters.h"
Chris@43: #include "base/PlayParameterRepository.h"
Chris@43: #include "base/Pitch.h"
Chris@43: #include "base/Exceptions.h"
Chris@43: 
Chris@43: #include "data/model/NoteModel.h"
Chris@43: #include "data/model/DenseTimeValueModel.h"
Chris@43: #include "data/model/SparseOneDimensionalModel.h"
Chris@43: 
Chris@43: #include "plugin/RealTimePluginFactory.h"
Chris@43: #include "plugin/RealTimePluginInstance.h"
Chris@43: #include "plugin/PluginIdentifier.h"
Chris@43: #include "plugin/PluginXml.h"
Chris@43: #include "plugin/api/alsa/seq_event.h"
Chris@43: 
Chris@43: #include <iostream>
Chris@167: #include <cmath>
Chris@43: 
Chris@43: #include <QDir>
Chris@43: #include <QFile>
Chris@43: 
Chris@43: const size_t
Chris@43: AudioGenerator::m_pluginBlockSize = 2048;
Chris@43: 
Chris@43: QString
Chris@43: AudioGenerator::m_sampleDir = "";
Chris@43: 
Chris@43: //#define DEBUG_AUDIO_GENERATOR 1
Chris@43: 
Chris@43: AudioGenerator::AudioGenerator() :
Chris@43:     m_sourceSampleRate(0),
Chris@43:     m_targetChannelCount(1),
Chris@43:     m_soloing(false)
Chris@43: {
Chris@108:     initialiseSampleDir();
Chris@43: 
Chris@43:     connect(PlayParameterRepository::getInstance(),
Chris@108:             SIGNAL(playPluginIdChanged(const Playable *, QString)),
Chris@43:             this,
Chris@108:             SLOT(playPluginIdChanged(const Playable *, QString)));
Chris@108: 
Chris@108:     connect(PlayParameterRepository::getInstance(),
Chris@108:             SIGNAL(playPluginConfigurationChanged(const Playable *, QString)),
Chris@108:             this,
Chris@108:             SLOT(playPluginConfigurationChanged(const Playable *, QString)));
Chris@43: }
Chris@43: 
Chris@43: AudioGenerator::~AudioGenerator()
Chris@43: {
Chris@177: #ifdef DEBUG_AUDIO_GENERATOR
Chris@233:     SVDEBUG << "AudioGenerator::~AudioGenerator" << endl;
Chris@177: #endif
Chris@43: }
Chris@43: 
Chris@108: void
Chris@108: AudioGenerator::initialiseSampleDir()
Chris@43: {
Chris@108:     if (m_sampleDir != "") return;
Chris@108: 
Chris@108:     try {
Chris@108:         m_sampleDir = TempDirectory::getInstance()->getSubDirectoryPath("samples");
Chris@108:     } catch (DirectoryCreationFailed f) {
Chris@108:         std::cerr << "WARNING: AudioGenerator::initialiseSampleDir:"
Chris@108:                   << " Failed to create temporary sample directory"
Chris@108:                   << std::endl;
Chris@108:         m_sampleDir = "";
Chris@108:         return;
Chris@108:     }
Chris@108: 
Chris@108:     QDir sampleResourceDir(":/samples", "*.wav");
Chris@108: 
Chris@108:     for (unsigned int i = 0; i < sampleResourceDir.count(); ++i) {
Chris@108: 
Chris@108:         QString fileName(sampleResourceDir[i]);
Chris@108:         QFile file(sampleResourceDir.filePath(fileName));
Chris@151:         QString target = QDir(m_sampleDir).filePath(fileName);
Chris@108: 
Chris@151:         if (!file.copy(target)) {
Chris@108:             std::cerr << "WARNING: AudioGenerator::getSampleDir: "
Chris@108:                       << "Unable to copy " << fileName.toStdString()
Chris@108:                       << " into temporary directory \""
Chris@228:                       << m_sampleDir << "\"" << std::endl;
Chris@151:         } else {
Chris@151:             QFile tf(target);
Chris@151:             tf.setPermissions(tf.permissions() |
Chris@151:                               QFile::WriteOwner |
Chris@151:                               QFile::WriteUser);
Chris@108:         }
Chris@43:     }
Chris@43: }
Chris@43: 
Chris@43: bool
Chris@43: AudioGenerator::addModel(Model *model)
Chris@43: {
Chris@43:     if (m_sourceSampleRate == 0) {
Chris@43: 
Chris@43: 	m_sourceSampleRate = model->getSampleRate();
Chris@43: 
Chris@43:     } else {
Chris@43: 
Chris@43: 	DenseTimeValueModel *dtvm =
Chris@43: 	    dynamic_cast<DenseTimeValueModel *>(model);
Chris@43: 
Chris@43: 	if (dtvm) {
Chris@43: 	    m_sourceSampleRate = model->getSampleRate();
Chris@43: 	    return true;
Chris@43: 	}
Chris@43:     }
Chris@43: 
Chris@43:     RealTimePluginInstance *plugin = loadPluginFor(model);
Chris@43:     if (plugin) {
Chris@43:         QMutexLocker locker(&m_mutex);
Chris@43:         m_synthMap[model] = plugin;
Chris@43:         return true;
Chris@43:     }
Chris@43: 
Chris@43:     return false;
Chris@43: }
Chris@43: 
Chris@43: void
Chris@108: AudioGenerator::playPluginIdChanged(const Playable *playable, QString)
Chris@43: {
Chris@108:     const Model *model = dynamic_cast<const Model *>(playable);
Chris@108:     if (!model) {
Chris@108:         std::cerr << "WARNING: AudioGenerator::playPluginIdChanged: playable "
Chris@108:                   << playable << " is not a supported model type"
Chris@108:                   << std::endl;
Chris@108:         return;
Chris@108:     }
Chris@108: 
Chris@43:     if (m_synthMap.find(model) == m_synthMap.end()) return;
Chris@43:     
Chris@43:     RealTimePluginInstance *plugin = loadPluginFor(model);
Chris@43:     if (plugin) {
Chris@43:         QMutexLocker locker(&m_mutex);
Chris@43:         delete m_synthMap[model];
Chris@43:         m_synthMap[model] = plugin;
Chris@43:     }
Chris@43: }
Chris@43: 
Chris@43: void
Chris@108: AudioGenerator::playPluginConfigurationChanged(const Playable *playable,
Chris@43:                                                QString configurationXml)
Chris@43: {
Chris@233: //    SVDEBUG << "AudioGenerator::playPluginConfigurationChanged" << endl;
Chris@43: 
Chris@108:     const Model *model = dynamic_cast<const Model *>(playable);
Chris@108:     if (!model) {
Chris@108:         std::cerr << "WARNING: AudioGenerator::playPluginIdChanged: playable "
Chris@108:                   << playable << " is not a supported model type"
Chris@108:                   << std::endl;
Chris@108:         return;
Chris@108:     }
Chris@108: 
Chris@43:     if (m_synthMap.find(model) == m_synthMap.end()) {
Chris@233:         SVDEBUG << "AudioGenerator::playPluginConfigurationChanged: We don't know about this plugin" << endl;
Chris@43:         return;
Chris@43:     }
Chris@43: 
Chris@43:     RealTimePluginInstance *plugin = m_synthMap[model];
Chris@43:     if (plugin) {
Chris@43:         PluginXml(plugin).setParametersFromXml(configurationXml);
Chris@43:     }
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::setSampleDir(RealTimePluginInstance *plugin)
Chris@43: {
Chris@108:     if (m_sampleDir != "") {
Chris@108:         plugin->configure("sampledir", m_sampleDir.toStdString());
Chris@108:     }
Chris@43: } 
Chris@43: 
Chris@43: RealTimePluginInstance *
Chris@43: AudioGenerator::loadPluginFor(const Model *model)
Chris@43: {
Chris@43:     QString pluginId, configurationXml;
Chris@43: 
Chris@108:     const Playable *playable = model;
Chris@108:     if (!playable || !playable->canPlay()) return 0;
Chris@108: 
Chris@43:     PlayParameters *parameters =
Chris@108: 	PlayParameterRepository::getInstance()->getPlayParameters(playable);
Chris@43:     if (parameters) {
Chris@43:         pluginId = parameters->getPlayPluginId();
Chris@43:         configurationXml = parameters->getPlayPluginConfiguration();
Chris@43:     }
Chris@43: 
Chris@276:     std::cerr << "AudioGenerator::loadPluginFor(" << model << "): id = " << pluginId << std::endl;
Chris@276: 
Chris@276:     if (pluginId == "") {
Chris@276:         SVDEBUG << "AudioGenerator::loadPluginFor(" << model << "): parameters contain empty plugin ID, skipping" << endl;
Chris@276:         return 0;
Chris@276:     }
Chris@43: 
Chris@43:     RealTimePluginInstance *plugin = loadPlugin(pluginId, "");
Chris@43:     if (!plugin) return 0;
Chris@43: 
Chris@276:     std::cerr << "AudioGenerator::loadPluginFor(" << model << "): loaded plugin "
Chris@276:               << plugin << std::endl;
Chris@276: 
Chris@43:     if (configurationXml != "") {
Chris@43:         PluginXml(plugin).setParametersFromXml(configurationXml);
Chris@179:         setSampleDir(plugin);
Chris@43:     }
Chris@43: 
Chris@108:     configurationXml = PluginXml(plugin).toXmlString();
Chris@108: 
Chris@43:     if (parameters) {
Chris@43:         parameters->setPlayPluginId(pluginId);
Chris@43:         parameters->setPlayPluginConfiguration(configurationXml);
Chris@43:     }
Chris@43: 
Chris@43:     return plugin;
Chris@43: }
Chris@43: 
Chris@43: RealTimePluginInstance *
Chris@43: AudioGenerator::loadPlugin(QString pluginId, QString program)
Chris@43: {
Chris@43:     RealTimePluginFactory *factory =
Chris@43: 	RealTimePluginFactory::instanceFor(pluginId);
Chris@43:     
Chris@43:     if (!factory) {
Chris@43: 	std::cerr << "Failed to get plugin factory" << std::endl;
Chris@274: 	return 0;
Chris@43:     }
Chris@43: 	
Chris@43:     RealTimePluginInstance *instance =
Chris@43: 	factory->instantiatePlugin
Chris@43: 	(pluginId, 0, 0, m_sourceSampleRate, m_pluginBlockSize, m_targetChannelCount);
Chris@43: 
Chris@43:     if (!instance) {
Chris@228: 	std::cerr << "Failed to instantiate plugin " << pluginId << std::endl;
Chris@43:         return 0;
Chris@43:     }
Chris@43: 
Chris@43:     setSampleDir(instance);
Chris@43: 
Chris@43:     for (unsigned int i = 0; i < instance->getParameterCount(); ++i) {
Chris@43:         instance->setParameterValue(i, instance->getParameterDefault(i));
Chris@43:     }
Chris@43:     std::string defaultProgram = instance->getProgram(0, 0);
Chris@43:     if (defaultProgram != "") {
Chris@276:         std::cerr << "first selecting default program " << defaultProgram << std::endl;
Chris@43:         instance->selectProgram(defaultProgram);
Chris@43:     }
Chris@43:     if (program != "") {
Chris@276:         std::cerr << "now selecting desired program " << program << std::endl;
Chris@43:         instance->selectProgram(program.toStdString());
Chris@43:     }
Chris@43:     instance->setIdealChannelCount(m_targetChannelCount); // reset!
Chris@43: 
Chris@43:     return instance;
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::removeModel(Model *model)
Chris@43: {
Chris@43:     SparseOneDimensionalModel *sodm =
Chris@43: 	dynamic_cast<SparseOneDimensionalModel *>(model);
Chris@43:     if (!sodm) return; // nothing to do
Chris@43: 
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43: 
Chris@43:     if (m_synthMap.find(sodm) == m_synthMap.end()) return;
Chris@43: 
Chris@43:     RealTimePluginInstance *instance = m_synthMap[sodm];
Chris@43:     m_synthMap.erase(sodm);
Chris@43:     delete instance;
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::clearModels()
Chris@43: {
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43:     while (!m_synthMap.empty()) {
Chris@43: 	RealTimePluginInstance *instance = m_synthMap.begin()->second;
Chris@43: 	m_synthMap.erase(m_synthMap.begin());
Chris@43: 	delete instance;
Chris@43:     }
Chris@43: }    
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::reset()
Chris@43: {
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43:     for (PluginMap::iterator i = m_synthMap.begin(); i != m_synthMap.end(); ++i) {
Chris@43: 	if (i->second) {
Chris@43: 	    i->second->silence();
Chris@43: 	    i->second->discardEvents();
Chris@43: 	}
Chris@43:     }
Chris@43: 
Chris@43:     m_noteOffs.clear();
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::setTargetChannelCount(size_t targetChannelCount)
Chris@43: {
Chris@43:     if (m_targetChannelCount == targetChannelCount) return;
Chris@43: 
Chris@233: //    SVDEBUG << "AudioGenerator::setTargetChannelCount(" << targetChannelCount << ")" << endl;
Chris@43: 
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43:     m_targetChannelCount = targetChannelCount;
Chris@43: 
Chris@43:     for (PluginMap::iterator i = m_synthMap.begin(); i != m_synthMap.end(); ++i) {
Chris@43: 	if (i->second) i->second->setIdealChannelCount(targetChannelCount);
Chris@43:     }
Chris@43: }
Chris@43: 
Chris@43: size_t
Chris@43: AudioGenerator::getBlockSize() const
Chris@43: {
Chris@43:     return m_pluginBlockSize;
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::setSoloModelSet(std::set<Model *> s)
Chris@43: {
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43: 
Chris@43:     m_soloModelSet = s;
Chris@43:     m_soloing = true;
Chris@43: }
Chris@43: 
Chris@43: void
Chris@43: AudioGenerator::clearSoloModelSet()
Chris@43: {
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43: 
Chris@43:     m_soloModelSet.clear();
Chris@43:     m_soloing = false;
Chris@43: }
Chris@43: 
Chris@43: size_t
Chris@43: AudioGenerator::mixModel(Model *model, size_t startFrame, size_t frameCount,
Chris@43: 			 float **buffer, size_t fadeIn, size_t fadeOut)
Chris@43: {
Chris@43:     if (m_sourceSampleRate == 0) {
Chris@43: 	std::cerr << "WARNING: AudioGenerator::mixModel: No base source sample rate available" << std::endl;
Chris@43: 	return frameCount;
Chris@43:     }
Chris@43: 
Chris@43:     QMutexLocker locker(&m_mutex);
Chris@43: 
Chris@108:     Playable *playable = model;
Chris@108:     if (!playable || !playable->canPlay()) return frameCount;
Chris@108: 
Chris@43:     PlayParameters *parameters =
Chris@108: 	PlayParameterRepository::getInstance()->getPlayParameters(playable);
Chris@43:     if (!parameters) return frameCount;
Chris@43: 
Chris@43:     bool playing = !parameters->isPlayMuted();
Chris@43:     if (!playing) {
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@43:         std::cout << "AudioGenerator::mixModel(" << model << "): muted" << std::endl;
Chris@43: #endif
Chris@43:         return frameCount;
Chris@43:     }
Chris@43: 
Chris@43:     if (m_soloing) {
Chris@43:         if (m_soloModelSet.find(model) == m_soloModelSet.end()) {
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@43:             std::cout << "AudioGenerator::mixModel(" << model << "): not one of the solo'd models" << std::endl;
Chris@43: #endif
Chris@43:             return frameCount;
Chris@43:         }
Chris@43:     }
Chris@43: 
Chris@43:     float gain = parameters->getPlayGain();
Chris@43:     float pan = parameters->getPlayPan();
Chris@43: 
Chris@43:     DenseTimeValueModel *dtvm = dynamic_cast<DenseTimeValueModel *>(model);
Chris@43:     if (dtvm) {
Chris@43: 	return mixDenseTimeValueModel(dtvm, startFrame, frameCount,
Chris@43: 				      buffer, gain, pan, fadeIn, fadeOut);
Chris@43:     }
Chris@43: 
Chris@43:     SparseOneDimensionalModel *sodm = dynamic_cast<SparseOneDimensionalModel *>
Chris@43: 	(model);
Chris@43:     if (sodm) {
Chris@275:         return mixSyntheticNoteModel(model, startFrame, frameCount,
Chris@275:                                      buffer, gain, pan, fadeIn, fadeOut);
Chris@43:     }
Chris@43: 
Chris@43:     NoteModel *nm = dynamic_cast<NoteModel *>(model);
Chris@43:     if (nm) {
Chris@275:         return mixSyntheticNoteModel(model, startFrame, frameCount,
Chris@275:                                      buffer, gain, pan, fadeIn, fadeOut);
Chris@43:     }
Chris@43: 
Chris@276:     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;
Chris@276: 
Chris@43:     return frameCount;
Chris@43: }
Chris@43: 
Chris@43: size_t
Chris@43: AudioGenerator::mixDenseTimeValueModel(DenseTimeValueModel *dtvm,
Chris@43: 				       size_t startFrame, size_t frames,
Chris@43: 				       float **buffer, float gain, float pan,
Chris@43: 				       size_t fadeIn, size_t fadeOut)
Chris@43: {
Chris@80:     static float **channelBuffer = 0;
Chris@80:     static size_t  channelBufSiz = 0;
Chris@80:     static size_t  channelBufCount = 0;
Chris@43: 
Chris@43:     size_t totalFrames = frames + fadeIn/2 + fadeOut/2;
Chris@43: 
Chris@80:     size_t modelChannels = dtvm->getChannelCount();
Chris@80: 
Chris@80:     if (channelBufSiz < totalFrames || channelBufCount < modelChannels) {
Chris@80: 
Chris@80:         for (size_t c = 0; c < channelBufCount; ++c) {
Chris@80:             delete[] channelBuffer[c];
Chris@80:         }
Chris@80: 
Chris@43: 	delete[] channelBuffer;
Chris@80:         channelBuffer = new float *[modelChannels];
Chris@80: 
Chris@80:         for (size_t c = 0; c < modelChannels; ++c) {
Chris@80:             channelBuffer[c] = new float[totalFrames];
Chris@80:         }
Chris@80: 
Chris@80:         channelBufCount = modelChannels;
Chris@43: 	channelBufSiz = totalFrames;
Chris@43:     }
Chris@80: 
Chris@43:     size_t got = 0;
Chris@80: 
Chris@80:     if (startFrame >= fadeIn/2) {
Chris@80:         got = dtvm->getData(0, modelChannels - 1,
Chris@80:                             startFrame - fadeIn/2,
Chris@80:                             frames + fadeOut/2 + fadeIn/2,
Chris@80:                             channelBuffer);
Chris@80:     } else {
Chris@80:         size_t missing = fadeIn/2 - startFrame;
Chris@80: 
Chris@80:         for (size_t c = 0; c < modelChannels; ++c) {
Chris@80:             channelBuffer[c] += missing;
Chris@80:         }
Chris@80: 
Chris@80:         got = dtvm->getData(0, modelChannels - 1,
Chris@80:                             startFrame,
Chris@80:                             frames + fadeOut/2,
Chris@80:                             channelBuffer);
Chris@80: 
Chris@80:         for (size_t c = 0; c < modelChannels; ++c) {
Chris@80:             channelBuffer[c] -= missing;
Chris@80:         }
Chris@80: 
Chris@80:         got += missing;
Chris@80:     }	    
Chris@43: 
Chris@43:     for (size_t c = 0; c < m_targetChannelCount; ++c) {
Chris@43: 
Chris@80: 	size_t sourceChannel = (c % modelChannels);
Chris@43: 
Chris@233: //	SVDEBUG << "mixing channel " << c << " from source channel " << sourceChannel << endl;
Chris@43: 
Chris@43: 	float channelGain = gain;
Chris@43: 	if (pan != 0.0) {
Chris@43: 	    if (c == 0) {
Chris@43: 		if (pan > 0.0) channelGain *= 1.0 - pan;
Chris@43: 	    } else {
Chris@43: 		if (pan < 0.0) channelGain *= pan + 1.0;
Chris@43: 	    }
Chris@43: 	}
Chris@43: 
Chris@43: 	for (size_t i = 0; i < fadeIn/2; ++i) {
Chris@43: 	    float *back = buffer[c];
Chris@43: 	    back -= fadeIn/2;
Chris@80: 	    back[i] += (channelGain * channelBuffer[sourceChannel][i] * i) / fadeIn;
Chris@43: 	}
Chris@43: 
Chris@43: 	for (size_t i = 0; i < frames + fadeOut/2; ++i) {
Chris@43: 	    float mult = channelGain;
Chris@43: 	    if (i < fadeIn/2) {
Chris@43: 		mult = (mult * i) / fadeIn;
Chris@43: 	    }
Chris@43: 	    if (i > frames - fadeOut/2) {
Chris@43: 		mult = (mult * ((frames + fadeOut/2) - i)) / fadeOut;
Chris@43: 	    }
Chris@80:             float val = channelBuffer[sourceChannel][i];
Chris@80:             if (i >= got) val = 0.f;
Chris@80: 	    buffer[c][i] += mult * val;
Chris@43: 	}
Chris@43:     }
Chris@43: 
Chris@43:     return got;
Chris@43: }
Chris@43:   
Chris@43: size_t
Chris@275: AudioGenerator::mixSyntheticNoteModel(Model *model,
Chris@275:                                       size_t startFrame, size_t frames,
Chris@275:                                       float **buffer, float gain, float pan,
Chris@275:                                       size_t /* fadeIn */,
Chris@275:                                       size_t /* fadeOut */)
Chris@43: {
Chris@275:     RealTimePluginInstance *plugin = m_synthMap[model];
Chris@43:     if (!plugin) return 0;
Chris@43: 
Chris@43:     size_t latency = plugin->getLatency();
Chris@43:     size_t blocks = frames / m_pluginBlockSize;
Chris@43:     
Chris@43:     //!!! hang on -- the fact that the audio callback play source's
Chris@43:     //buffer is a multiple of the plugin's buffer size doesn't mean
Chris@43:     //that we always get called for a multiple of it here (because it
Chris@43:     //also depends on the JACK block size).  how should we ensure that
Chris@43:     //all models write the same amount in to the mix, and that we
Chris@43:     //always have a multiple of the plugin buffer size?  I guess this
Chris@43:     //class has to be queryable for the plugin buffer size & the
Chris@43:     //callback play source has to use that as a multiple for all the
Chris@43:     //calls to mixModel
Chris@43: 
Chris@43:     size_t got = blocks * m_pluginBlockSize;
Chris@43: 
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275:     std::cout << "mixModel [synthetic note]: frames " << frames
Chris@43: 	      << ", blocks " << blocks << std::endl;
Chris@43: #endif
Chris@43: 
Chris@43:     snd_seq_event_t onEv;
Chris@43:     onEv.type = SND_SEQ_EVENT_NOTEON;
Chris@43:     onEv.data.note.channel = 0;
Chris@43: 
Chris@43:     snd_seq_event_t offEv;
Chris@43:     offEv.type = SND_SEQ_EVENT_NOTEOFF;
Chris@43:     offEv.data.note.channel = 0;
Chris@43:     offEv.data.note.velocity = 0;
Chris@43:     
Chris@275:     NoteOffSet &noteOffs = m_noteOffs[model];
Chris@43: 
Chris@43:     for (size_t i = 0; i < blocks; ++i) {
Chris@43: 
Chris@43: 	size_t reqStart = startFrame + i * m_pluginBlockSize;
Chris@43: 
Chris@275:         NoteList notes = getNotes(model,
Chris@275:                                   reqStart + latency,
Chris@275:                                   reqStart + latency + m_pluginBlockSize);
Chris@43: 
Chris@43:         Vamp::RealTime blockTime = Vamp::RealTime::frame2RealTime
Chris@43: 	    (startFrame + i * m_pluginBlockSize, m_sourceSampleRate);
Chris@43: 
Chris@275: 	for (NoteList::const_iterator ni = notes.begin();
Chris@275:              ni != notes.end(); ++ni) {
Chris@43: 
Chris@275: 	    size_t noteFrame = ni->start;
Chris@43: 
Chris@275: 	    if (noteFrame >= latency) noteFrame -= latency;
Chris@43: 
Chris@275: 	    if (noteFrame < reqStart ||
Chris@275: 		noteFrame >= reqStart + m_pluginBlockSize) continue;
Chris@43: 
Chris@43: 	    while (noteOffs.begin() != noteOffs.end() &&
Chris@275: 		   noteOffs.begin()->frame <= noteFrame) {
Chris@43: 
Chris@43:                 Vamp::RealTime eventTime = Vamp::RealTime::frame2RealTime
Chris@43: 		    (noteOffs.begin()->frame, m_sourceSampleRate);
Chris@43: 
Chris@43: 		offEv.data.note.note = noteOffs.begin()->pitch;
Chris@43: 
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275: 		std::cerr << "mixModel [synthetic]: sending note-off event at time " << eventTime << " frame " << noteOffs.begin()->frame << " pitch " << noteOffs.begin()->pitch << std::endl;
Chris@43: #endif
Chris@43: 
Chris@43: 		plugin->sendEvent(eventTime, &offEv);
Chris@43: 		noteOffs.erase(noteOffs.begin());
Chris@43: 	    }
Chris@43: 
Chris@43:             Vamp::RealTime eventTime = Vamp::RealTime::frame2RealTime
Chris@275: 		(noteFrame, m_sourceSampleRate);
Chris@43: 	    
Chris@275:             if (ni->isMidiPitchQuantized) {
Chris@275:                 onEv.data.note.note = ni->midiPitch;
Chris@275:             } else {
Chris@275: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275:                 std::cerr << "mixModel [synthetic]: non-pitch-quantized notes are not supported [yet], quantizing" << std::endl;
Chris@275: #endif
Chris@275:                 onEv.data.note.note = Pitch::getPitchForFrequency(ni->frequency);
Chris@275:             }
Chris@275: 
Chris@275:             onEv.data.note.velocity = ni->velocity;
Chris@275: 
Chris@43: 	    plugin->sendEvent(eventTime, &onEv);
Chris@43: 
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275: 	    std::cout << "mixModel [synthetic]: note at frame " << noteFrame << ", block start " << (startFrame + i * m_pluginBlockSize) << ", resulting time " << eventTime << std::endl;
Chris@43: #endif
Chris@43: 	    
Chris@275: 	    noteOffs.insert
Chris@275:                 (NoteOff(onEv.data.note.note, noteFrame + ni->duration));
Chris@43: 	}
Chris@43: 
Chris@43: 	while (noteOffs.begin() != noteOffs.end() &&
Chris@43: 	       noteOffs.begin()->frame <=
Chris@43: 	       startFrame + i * m_pluginBlockSize + m_pluginBlockSize) {
Chris@43: 
Chris@43:             Vamp::RealTime eventTime = Vamp::RealTime::frame2RealTime
Chris@43: 		(noteOffs.begin()->frame, m_sourceSampleRate);
Chris@43: 
Chris@43: 	    offEv.data.note.note = noteOffs.begin()->pitch;
Chris@43: 
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275:             std::cerr << "mixModel [synthetic]: sending leftover note-off event at time " << eventTime << " frame " << noteOffs.begin()->frame << " pitch " << noteOffs.begin()->pitch << std::endl;
Chris@43: #endif
Chris@43: 
Chris@43: 	    plugin->sendEvent(eventTime, &offEv);
Chris@43: 	    noteOffs.erase(noteOffs.begin());
Chris@43: 	}
Chris@43: 	
Chris@43: 	plugin->run(blockTime);
Chris@43: 	float **outs = plugin->getAudioOutputBuffers();
Chris@43: 
Chris@43: 	for (size_t c = 0; c < m_targetChannelCount; ++c) {
Chris@43: #ifdef DEBUG_AUDIO_GENERATOR
Chris@275: 	    std::cout << "mixModel [synthetic]: adding " << m_pluginBlockSize << " samples from plugin output " << c << std::endl;
Chris@43: #endif
Chris@43: 
Chris@43: 	    size_t sourceChannel = (c % plugin->getAudioOutputCount());
Chris@43: 
Chris@43: 	    float channelGain = gain;
Chris@43: 	    if (pan != 0.0) {
Chris@43: 		if (c == 0) {
Chris@43: 		    if (pan > 0.0) channelGain *= 1.0 - pan;
Chris@43: 		} else {
Chris@43: 		    if (pan < 0.0) channelGain *= pan + 1.0;
Chris@43: 		}
Chris@43: 	    }
Chris@43: 
Chris@43: 	    for (size_t j = 0; j < m_pluginBlockSize; ++j) {
Chris@43: 		buffer[c][i * m_pluginBlockSize + j] +=
Chris@43: 		    channelGain * outs[sourceChannel][j];
Chris@43: 	    }
Chris@43: 	}
Chris@43:     }
Chris@43: 
Chris@43:     return got;
Chris@43: }
Chris@43: 
Chris@275: AudioGenerator::NoteList
Chris@275: AudioGenerator::getNotes(Model *model,
Chris@275:                          size_t startFrame,
Chris@275:                          size_t endFrame)
Chris@43: {
Chris@275:     NoteList notes;
Chris@43: 
Chris@275:     SparseOneDimensionalModel *sodm = 
Chris@275:         qobject_cast<SparseOneDimensionalModel *>(model);
Chris@43: 
Chris@275:     if (sodm) {
Chris@275:         
Chris@275: 	SparseOneDimensionalModel::PointList points =
Chris@275: 	    sodm->getPoints(startFrame, endFrame);
Chris@43: 
Chris@275: 	for (SparseOneDimensionalModel::PointList::iterator pli =
Chris@43: 		 points.begin(); pli != points.end(); ++pli) {
Chris@43: 
Chris@275:             notes.push_back
Chris@275:                 (NoteData(pli->frame,
Chris@275:                           m_sourceSampleRate / 6, // arbitrary short duration
Chris@275:                           64,   // default pitch
Chris@275:                           100)); // default velocity
Chris@275:         }
Chris@43: 
Chris@275:         return notes;
Chris@275:     }
Chris@43: 
Chris@275:     NoteModel *nm = qobject_cast<NoteModel *>(model);
Chris@43: 
Chris@275:     if (nm) {
Chris@275:         
Chris@275: 	NoteModel::PointList points =
Chris@275: 	    nm->getPoints(startFrame, endFrame);
Chris@43: 
Chris@275:         for (NoteModel::PointList::iterator pli =
Chris@275: 		 points.begin(); pli != points.end(); ++pli) {
Chris@43: 
Chris@43: 	    size_t duration = pli->duration;
Chris@43:             if (duration == 0 || duration == 1) {
Chris@43:                 duration = m_sourceSampleRate / 20;
Chris@43:             }
Chris@179: 
Chris@275:             int pitch = lrintf(pli->value);
Chris@43: 
Chris@275:             int velocity = 100;
Chris@275:             if (pli->level > 0.f && pli->level <= 1.f) {
Chris@275:                 velocity = lrintf(pli->level * 127);
Chris@275:             }
Chris@43: 
Chris@275:             NoteData note(pli->frame,
Chris@275:                           duration,
Chris@275:                           pitch,
Chris@275:                           velocity);
Chris@43: 
Chris@275:             if (nm->getScaleUnits() == "Hz") {
Chris@275:                 note.frequency = pli->value;
Chris@275:                 note.isMidiPitchQuantized = false;
Chris@275:             }
Chris@275:         
Chris@275:             notes.push_back(note);
Chris@275:         }
Chris@43: 
Chris@275:         return notes;
Chris@43:     }
Chris@43: 
Chris@275:     return notes;
Chris@43: }
Chris@43: