don't use fifoWriter when rendering as we do not have realtime issues here - fixes lockups on various systems when exporting project

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1122 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/core/audio/audio_device.cpp

@@ -96,7 +96,7 @@ fpp_t audioDevice::getNextBuffer( surroundSampleFrame * _ab )
 	// make sure, no other thread is accessing device
 	lock();
 
-	// now were safe to access the device
+	// resample if neccessary
 	if( getMixer()->processingSampleRate() != m_sampleRate )
 	{
 		resample( b, frames, _ab, getMixer()->processingSampleRate(),
@@ -112,7 +112,10 @@ fpp_t audioDevice::getNextBuffer( surroundSampleFrame * _ab )
 	// release lock
 	unlock();
 
-	delete[] b;
+	if( getMixer()->hasFifoWriter() )
+	{
+		delete[] b;
+	}
 
 	return( frames );
 }
@@ -122,9 +125,12 @@ fpp_t audioDevice::getNextBuffer( surroundSampleFrame * _ab )
 
 void audioDevice::stopProcessing( void )
 {
-	while( m_inProcess )
+	if( getMixer()->hasFifoWriter() )
 	{
-		processNextBuffer();
+		while( m_inProcess )
+		{
+			processNextBuffer();
+		}
 	}
 }
 

src/core/mixer.cpp

@@ -344,10 +344,17 @@ void mixer::initDevices( void )
 
 
 
-void mixer::startProcessing( void )
+void mixer::startProcessing( bool _needs_fifo )
 {
-	m_fifo_writer = new fifoWriter( this, m_fifo );
-	m_fifo_writer->start();
+	if( _needs_fifo )
+	{
+		m_fifoWriter = new fifoWriter( this, m_fifo );
+		m_fifoWriter->start();
+	}
+	else
+	{
+		m_fifoWriter = NULL;
+	}
 
 	m_audioDev->startProcessing();
 }
@@ -357,13 +364,19 @@ void mixer::startProcessing( void )
 
 void mixer::stopProcessing( void )
 {
-	m_fifo_writer->finish();
-
-	m_audioDev->stopProcessing();
-
-	m_fifo_writer->wait( 1000 );
-	m_fifo_writer->terminate();
-	delete m_fifo_writer;
+	if( m_fifoWriter != NULL )
+	{
+		m_fifoWriter->finish();
+		m_audioDev->stopProcessing();
+		m_fifoWriter->wait( 1000 );
+		m_fifoWriter->terminate();
+		delete m_fifoWriter;
+		m_fifoWriter = NULL;
+	}
+	else
+	{
+		m_audioDev->stopProcessing();
+	}
 }
 
 
@@ -825,7 +838,8 @@ void mixer::setAudioDevice( audioDevice * _dev )
 
 
 void mixer::setAudioDevice( audioDevice * _dev,
-					const struct qualitySettings & _qs )
+				const struct qualitySettings & _qs,
+				bool _needs_fifo )
 {
 	// don't delete the audio-device
 	stopProcessing();
@@ -847,7 +861,7 @@ void mixer::setAudioDevice( audioDevice * _dev,
 	emit qualitySettingsChanged();
 	emit sampleRateChanged();
 
-	startProcessing();
+	startProcessing( _needs_fifo );
 }
 
 

src/core/project_renderer.cpp

@@ -146,7 +146,8 @@ void projectRenderer::startProcessing( void )
 	// have to do mixer stuff with GUI-thread-affinity in order to make
 	// slots connected to sampleRateChanged()-signals being called
 	// immediately
-	engine::getMixer()->setAudioDevice( m_fileDev, m_qualitySettings );
+	engine::getMixer()->setAudioDevice( m_fileDev, m_qualitySettings,
+									FALSE );
 
 	start( QThread::HighestPriority );
 }