Fix freeze when finishing export

include/AudioAlsa.h

@@ -33,6 +33,7 @@
 #define ALSA_PCM_NEW_HW_PARAMS_API
 
 #include <alsa/asoundlib.h>
+#include <QThread>
 
 #include "AudioDevice.h"
 

include/AudioDevice.h

@@ -25,17 +25,15 @@
 #ifndef AUDIO_DEVICE_H
 #define AUDIO_DEVICE_H
 
-#include <QtCore/QPair>
 #include <QtCore/QMutex>
-#include <QtCore/QThread>
 #include <samplerate.h>
 
 #include "lmms_basics.h"
-#include "TabWidget.h"
 
 
 class AudioPort;
 class Mixer;
+class QThread;
 
 
 class AudioDevice
@@ -135,6 +133,8 @@ class AudioDevice
 
 	bool hqAudio() const;
 
+	static void stopProcessingThread( QThread * thread );
+
 
 protected:
 	bool m_supportsCapture;

include/AudioDummy.h

@@ -84,11 +84,7 @@ class AudioDummy : public AudioDevice, public QThread
 
 	virtual void stopProcessing()
 	{
-		if( isRunning() )
-		{
-			wait( 1000 );
-			terminate();
-		}
+		stopProcessingThread( this );
 	}
 
 	virtual void run()

include/AudioOss.h

@@ -29,6 +29,8 @@
 
 #ifdef LMMS_HAVE_OSS
 
+#include <QThread>
+
 #include "AudioDevice.h"
 #include "AudioDeviceSetupWidget.h"
 

include/AudioPulseAudio.h

@@ -30,6 +30,7 @@
 #ifdef LMMS_HAVE_PULSEAUDIO
 
 #include <pulse/pulseaudio.h>
+#include <QThread>
 
 #include "AudioDevice.h"
 #include "AudioDeviceSetupWidget.h"

include/AudioSndio.h

@@ -5,6 +5,7 @@
 
 #ifdef LMMS_HAVE_SNDIO
 
+#include <QThread>
 #include <sndio.h>
 
 #include "AudioDevice.h"

include/Mixer.h

@@ -331,6 +331,8 @@ class EXPORT Mixer : public QObject
 
 		virtual void run();
 
+		void write( surroundSampleFrame * buffer );
+
 	} ;
 
 
@@ -347,6 +349,7 @@ class EXPORT Mixer : public QObject
 
 	const surroundSampleFrame * renderNextBuffer();
 
+	void clearInternal();
 
 	void runChangesInModel();
 
@@ -403,6 +406,8 @@ class EXPORT Mixer : public QObject
 
 	bool m_metronomeActive;
 
+	bool m_clearSignal;
+
 	bool m_changesSignal;
 	bool m_waitForMixer;
 	unsigned int m_changes;

include/fifo_buffer.h

@@ -57,6 +57,18 @@ class fifoBuffer
 		m_reader_sem.release();
 	}
 
+	bool tryWrite( T _element )
+	{
+		if( m_writer_sem.tryAcquire() )
+		{
+			m_buffer[m_writer_index++] = _element;
+			m_writer_index %= m_size;
+			m_reader_sem.release();
+			return true;
+		}
+		return false;
+	}
+
 	T read()
 	{
 		m_reader_sem.acquire();

src/core/Mixer.cpp

@@ -82,6 +82,7 @@ Mixer::Mixer( bool renderOnly ) :
 	m_audioDevStartFailed( false ),
 	m_profiler(),
 	m_metronomeActive(false),
+	m_clearSignal( false ),
 	m_changesSignal( false ),
 	m_waitForMixer( true ),
 	m_changes( 0 ),
@@ -234,9 +235,9 @@ void Mixer::stopProcessing()
 	{
 		m_fifoWriter->finish();
 		m_fifoWriter->wait();
+		m_audioDev->stopProcessing();
 		delete m_fifoWriter;
 		m_fifoWriter = NULL;
-		m_audioDev->stopProcessing();
 	}
 	else
 	{
@@ -365,6 +366,12 @@ const surroundSampleFrame * Mixer::renderNextBuffer()
 	// clear new write buffer
 	m_inputBufferFrames[ m_inputBufferWrite ] = 0;
 
+	if( m_clearSignal )
+	{
+		m_clearSignal = false;
+		clearInternal();
+	}
+
 	// remove all play-handles that have to be deleted and delete
 	// them if they still exist...
 	// maybe this algorithm could be optimized...
@@ -469,12 +476,19 @@ const surroundSampleFrame * Mixer::renderNextBuffer()
 
 
 
+void Mixer::clear()
+{
+	m_clearSignal = true;
+}
+
+
+
+
 // removes all play-handles. this is necessary, when the song is stopped ->
 // all remaining notes etc. would be played until their end
-void Mixer::clear()
+void Mixer::clearInternal()
 {
 	// TODO: m_midiClient->noteOffAll();
-	requestChangeInModel();
 	for( PlayHandleList::Iterator it = m_playHandles.begin(); it != m_playHandles.end(); ++it )
 	{
 		// we must not delete instrument-play-handles as they exist
@@ -484,7 +498,6 @@ void Mixer::clear()
 			m_playHandlesToRemove.push_back( *it );
 		}
 	}
-	doneChangeInModel();
 }
 
 
@@ -1053,10 +1066,26 @@ void Mixer::fifoWriter::run()
 		surroundSampleFrame * buffer = new surroundSampleFrame[frames];
 		const surroundSampleFrame * b = m_mixer->renderNextBuffer();
 		memcpy( buffer, b, frames * sizeof( surroundSampleFrame ) );
-		m_fifo->write( buffer );
+		write( buffer );
 	}
 
-	m_fifo->write( NULL );
+	write( NULL );
+}
+
+
+
+
+void Mixer::fifoWriter::write( surroundSampleFrame * buffer )
+{
+	while( !m_fifo->tryWrite( buffer ) )
+	{
+		if( m_mixer->m_changesSignal )
+		{
+			m_mixer->runChangesInModel();
+			continue;
+		}
+		yieldCurrentThread();
+	}
 }
 
 

src/core/audio/AudioAlsa.cpp

@@ -245,11 +245,7 @@ void AudioAlsa::startProcessing()
 
 void AudioAlsa::stopProcessing()
 {
-	if( isRunning() )
-	{
-		wait( 1000 );
-		terminate();
-	}
+	stopProcessingThread( this );
 }
 
 

src/core/audio/AudioDevice.cpp

@@ -131,6 +131,22 @@ void AudioDevice::stopProcessing()
 
 
 
+void AudioDevice::stopProcessingThread( QThread * thread )
+{
+	if( !thread->wait( 30000 ) )
+	{
+		fprintf( stderr, "Terminating audio device thread\n" );
+		thread->terminate();
+		if( !thread->wait( 1000 ) )
+		{
+			fprintf( stderr, "Thread not terminated yet\n" );
+		}
+	}
+}
+
+
+
+
 void AudioDevice::applyQualitySettings()
 {
 	src_delete( m_srcState );

src/core/audio/AudioOss.cpp

@@ -255,11 +255,7 @@ void AudioOss::startProcessing()
 
 void AudioOss::stopProcessing()
 {
-	if( isRunning() )
-	{
-		wait( 1000 );
-		terminate();
-	}
+	stopProcessingThread( this );
 }
 
 

src/core/audio/AudioPulseAudio.cpp

@@ -105,11 +105,7 @@ void AudioPulseAudio::startProcessing()
 
 void AudioPulseAudio::stopProcessing()
 {
-	if( isRunning() )
-	{
-		wait( 1000 );
-		terminate();
-	}
+	stopProcessingThread( this );
 }
 
 

src/core/audio/AudioSndio.cpp

@@ -114,11 +114,7 @@ void AudioSndio::startProcessing( void )
 
 void AudioSndio::stopProcessing( void )
 {
-	if( isRunning() )
-	{
-		wait( 1000 );
-		terminate();
-	}
+	stopProcessingThread( this );
 }