Defer updates to SampleBuffer

Removed global lock from the Mixer

src/core/EffectChain.cpp

@@ -122,9 +122,9 @@ void EffectChain::loadSettings( const QDomElement & _this )
 
 void EffectChain::appendEffect( Effect * _effect )
 {
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 	m_effects.append( _effect );
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 
 	emit dataChanged();
 }
@@ -134,21 +134,18 @@ void EffectChain::appendEffect( Effect * _effect )
 
 void EffectChain::removeEffect( Effect * _effect )
 {
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 
 	Effect ** found = qFind( m_effects.begin(), m_effects.end(), _effect );
 	if( found == m_effects.end() )
 	{
-		goto fail;
+		Engine::mixer()->doneChangeInModel();
+		return;
 	}
 	m_effects.erase( found );
 
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 	emit dataChanged();
-	return;
-
-fail:
-	Engine::mixer()->unlock();
 }
 
 
@@ -252,7 +249,7 @@ void EffectChain::clear()
 {
 	emit aboutToClear();
 
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 
 	m_enabledModel.setValue( false );
 	for( int i = 0; i < m_effects.count(); ++i )
@@ -261,5 +258,5 @@ void EffectChain::clear()
 	}
 	m_effects.clear();
 
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 }

src/core/FxMixer.cpp

@@ -285,8 +285,8 @@ void FxMixer::toggledSolo()
 
 void FxMixer::deleteChannel( int index )
 {
-	// lock the mixer so channel deletion is performed between mixer rounds
-	Engine::mixer()->lock();
+	// channel deletion is performed between mixer rounds
+	Engine::mixer()->requestChangeInModel();
 
 	FxChannel * ch = m_fxChannels[index];
 
@@ -347,7 +347,7 @@ void FxMixer::deleteChannel( int index )
 		}
 	}
 
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 }
 
 

src/core/Mixer.cpp

@@ -75,7 +75,6 @@ Mixer::Mixer( bool renderOnly ) :
 	m_audioDev( NULL ),
 	m_oldAudioDev( NULL ),
 	m_audioDevStartFailed( false ),
-	m_globalMutex( QMutex::Recursive ),
 	m_profiler(),
 	m_metronomeActive(false),
 	m_changesSignal( false ),
@@ -386,10 +385,6 @@ const surroundSampleFrame * Mixer::renderNextBuffer()
 	}
 	unlockPlayHandleRemoval();
 
-	// now we have to make sure no other thread does anything bad
-	// while we're acting...
-	lock();
-
 	// rotate buffers
 	m_writeBuffer = ( m_writeBuffer + 1 ) % m_poolDepth;
 	m_readBuffer = ( m_readBuffer + 1 ) % m_poolDepth;
@@ -453,8 +448,6 @@ const surroundSampleFrame * Mixer::renderNextBuffer()
 	// STAGE 3: do master mix in FX mixer
 	fxMixer->masterMix( m_writeBuf );
 
-	unlock();
-
 
 	emit nextAudioBuffer( m_readBuf );
 
@@ -481,7 +474,6 @@ const surroundSampleFrame * Mixer::renderNextBuffer()
 void Mixer::clear()
 {
 	// TODO: m_midiClient->noteOffAll();
-	lock();
 	lockPlayHandleRemoval();
 	for( PlayHandleList::Iterator it = m_playHandles.begin(); it != m_playHandles.end(); ++it )
 	{
@@ -493,7 +485,6 @@ void Mixer::clear()
 		}
 	}
 	unlockPlayHandleRemoval();
-	unlock();
 }
 
 
@@ -620,9 +611,7 @@ void Mixer::removeAudioPort( AudioPort * _port )
 							_port );
 	if( it != m_audioPorts.end() )
 	{
-		lock();
 		m_audioPorts.erase( it );
-		unlock();
 	}
 }
 
@@ -650,7 +639,7 @@ bool Mixer::addPlayHandle( PlayHandle* handle )
 
 void Mixer::removePlayHandle( PlayHandle * _ph )
 {
-	lockPlayHandleRemoval();
+	requestChangeInModel();
 	// check thread affinity as we must not delete play-handles
 	// which were created in a thread different than mixer thread
 	if( _ph->affinityMatters() &&
@@ -694,7 +683,7 @@ void Mixer::removePlayHandle( PlayHandle * _ph )
 	{
 		m_playHandlesToRemove.push_back( _ph );
 	}
-	unlockPlayHandleRemoval();
+	doneChangeInModel();
 }
 
 
@@ -702,7 +691,7 @@ void Mixer::removePlayHandle( PlayHandle * _ph )
 
 void Mixer::removePlayHandlesOfTypes( Track * _track, const quint8 types )
 {
-	lockPlayHandleRemoval();
+	requestChangeInModel();
 	PlayHandleList::Iterator it = m_playHandles.begin();
 	while( it != m_playHandles.end() )
 	{
@@ -721,7 +710,7 @@ void Mixer::removePlayHandlesOfTypes( Track * _track, const quint8 types )
 			++it;
 		}
 	}
-	unlockPlayHandleRemoval();
+	doneChangeInModel();
 }
 
 
@@ -729,18 +718,13 @@ void Mixer::removePlayHandlesOfTypes( Track * _track, const quint8 types )
 
 bool Mixer::hasNotePlayHandles()
 {
-	lock();
-
 	for( PlayHandleList::Iterator it = m_playHandles.begin(); it != m_playHandles.end(); ++it )
 	{
 		if( (*it)->type() == PlayHandle::TypeNotePlayHandle )
 		{
-			unlock();
 			return true;
 		}
 	}
-
-	unlock();
 	return false;
 }
 

src/core/SampleBuffer.cpp

@@ -170,6 +170,7 @@ void SampleBuffer::update( bool _keep_settings )
 	const bool lock = ( m_data != NULL );
 	if( lock )
 	{
+		Engine::mixer()->requestChangeInModel();
 		m_varLock.lockForWrite();
 		MM_FREE( m_data );
 	}
@@ -270,6 +271,7 @@ void SampleBuffer::update( bool _keep_settings )
 	if( lock )
 	{
 		m_varLock.unlock();
+		Engine::mixer()->doneChangeInModel();
 	}
 
 	emit sampleUpdated();
@@ -354,7 +356,7 @@ void SampleBuffer::normalizeSampleRate( const sample_rate_t _src_sr,
 	// do samplerate-conversion to our default-samplerate
 	if( _src_sr != Engine::mixer()->baseSampleRate() )
 	{
-		SampleBuffer * resampled = resample( this, _src_sr,
+		SampleBuffer * resampled = resample( _src_sr,
 					Engine::mixer()->baseSampleRate() );
 		MM_FREE( m_data );
 		m_frames = resampled->frames();
@@ -597,8 +599,6 @@ bool SampleBuffer::play( sampleFrame * _ab, handleState * _state,
 					const float _freq,
 					const LoopMode _loopmode )
 {
-	QReadLocker readLocker(&m_varLock);
-
 	f_cnt_t startFrame = m_startFrame;
 	f_cnt_t endFrame = m_endFrame;
 	f_cnt_t loopStartFrame = m_loopStartFrame;
@@ -1147,12 +1147,12 @@ QString & SampleBuffer::toBase64( QString & _dst ) const
 
 
 
-SampleBuffer * SampleBuffer::resample( sampleFrame * _data,
-						const f_cnt_t _frames,
-						const sample_rate_t _src_sr,
+SampleBuffer * SampleBuffer::resample( const sample_rate_t _src_sr,
 						const sample_rate_t _dst_sr )
 {
-	const f_cnt_t dst_frames = static_cast<f_cnt_t>( _frames /
+	sampleFrame * data = m_data;
+	const f_cnt_t frames = m_frames;
+	const f_cnt_t dst_frames = static_cast<f_cnt_t>( frames /
 					(float) _src_sr * (float) _dst_sr );
 	SampleBuffer * dst_sb = new SampleBuffer( dst_frames );
 	sampleFrame * dst_buf = dst_sb->m_origData;
@@ -1165,9 +1165,9 @@ SampleBuffer * SampleBuffer::resample( sampleFrame * _data,
 	{
 		SRC_DATA src_data;
 		src_data.end_of_input = 1;
-		src_data.data_in = _data[0];
+		src_data.data_in = data[0];
 		src_data.data_out = dst_buf[0];
-		src_data.input_frames = _frames;
+		src_data.input_frames = frames;
 		src_data.output_frames = dst_frames;
 		src_data.src_ratio = (double) _dst_sr / _src_sr;
 		if( ( error = src_process( state, &src_data ) ) )
@@ -1355,7 +1355,6 @@ void SampleBuffer::loadFromBase64( const QString & _data )
 
 void SampleBuffer::setStartFrame( const f_cnt_t _s )
 {
-	QWriteLocker writeLocker(&m_varLock);
 	m_startFrame = _s;
 }
 
@@ -1364,7 +1363,6 @@ void SampleBuffer::setStartFrame( const f_cnt_t _s )
 
 void SampleBuffer::setEndFrame( const f_cnt_t _e )
 {
-	QWriteLocker writeLocker(&m_varLock);
 	m_endFrame = _e;
 }
 

src/core/Song.cpp

@@ -790,7 +790,7 @@ void Song::clearProject()
 	}
 
 
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 
 	if( gui && gui->getBBEditor() )
 	{
@@ -831,7 +831,7 @@ void Song::clearProject()
 	AutomationPattern::globalAutomationPattern( &m_masterPitchModel )->
 									clear();
 
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 
 	if( gui && gui->getProjectNotes() )
 	{
@@ -963,7 +963,7 @@ void Song::loadProject( const QString & fileName )
 
 	DataFile::LocaleHelper localeHelper( DataFile::LocaleHelper::ModeLoad );
 
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 
 	// get the header information from the DOM
 	m_tempoModel.loadSettings( dataFile.head(), "bpm" );
@@ -1050,7 +1050,7 @@ void Song::loadProject( const QString & fileName )
 	AutomationPattern::resolveAllIDs();
 
 
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 
 	ConfigManager::inst()->addRecentlyOpenedProject( fileName );
 

src/gui/FileBrowser.cpp

@@ -534,7 +534,7 @@ void FileBrowserTreeWidget::mouseReleaseEvent(QMouseEvent * me )
 
 void FileBrowserTreeWidget::handleFile(FileItem * f, InstrumentTrack * it )
 {
-	Engine::mixer()->lock();
+	Engine::mixer()->requestChangeInModel();
 	switch( f->handling() )
 	{
 		case FileItem::LoadAsProject:
@@ -582,7 +582,7 @@ void FileBrowserTreeWidget::handleFile(FileItem * f, InstrumentTrack * it )
 			break;
 
 	}
-	Engine::mixer()->unlock();
+	Engine::mixer()->doneChangeInModel();
 }
 
 
@@ -604,12 +604,10 @@ void FileBrowserTreeWidget::activateListItem(QTreeWidgetItem * item,
 	}
 	else if( f->handling() != FileItem::NotSupported )
 	{
-//		engine::mixer()->lock();
 		InstrumentTrack * it = dynamic_cast<InstrumentTrack *>(
 				Track::create( Track::InstrumentTrack,
 					Engine::getBBTrackContainer() ) );
 		handleFile( f, it );
-//		engine::mixer()->unlock();
 	}
 }
 
@@ -621,11 +619,9 @@ void FileBrowserTreeWidget::openInNewInstrumentTrack( TrackContainer* tc )
 	if( m_contextMenuItem->handling() == FileItem::LoadAsPreset ||
 		m_contextMenuItem->handling() == FileItem::LoadByPlugin )
 	{
-//		engine::mixer()->lock();
 		InstrumentTrack * it = dynamic_cast<InstrumentTrack *>(
 				Track::create( Track::InstrumentTrack, tc ) );
 		handleFile( m_contextMenuItem, it );
-//		engine::mixer()->unlock();
 	}
 }
 

src/gui/widgets/EnvelopeAndLfoView.cpp

@@ -508,6 +508,8 @@ void EnvelopeAndLfoView::paintEvent( QPaintEvent * )
 		osc_frames *= 100.0f;
 	}
 
+	// userWaveSample() may be used, called out of loop for efficiency
+	m_params->m_userWave.dataReadLock();
 	float old_y = 0;
 	for( int x = 0; x <= LFO_GRAPH_W; ++x )
 	{
@@ -558,6 +560,7 @@ void EnvelopeAndLfoView::paintEvent( QPaintEvent * )
 						graph_y_base + cur_y ) );
 		old_y = cur_y;
 	}
+	m_params->m_userWave.dataUnlock();
 
 	p.setPen( QColor( 201, 201, 225 ) );
 	int ms_per_osc = static_cast<int>( SECS_PER_LFO_OSCILLATION *

src/gui/widgets/Graph.cpp

@@ -585,11 +585,13 @@ QString graphModel::setWaveToUser()
 	QString fileName = sampleBuffer->openAndSetWaveformFile();
 	if( fileName.isEmpty() == false )
 	{
+		sampleBuffer->dataReadLock();
 		for( int i = 0; i < length(); i++ )
 		{
 			m_samples[i] = sampleBuffer->userWaveSample(
 					i / static_cast<float>( length() ) );
 		}
+		sampleBuffer->dataUnlock();
 	}
 
 	sharedObject::unref( sampleBuffer );