added support for PortAudio

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1507 0778d3d1-df1d-0410-868b-ea421aaaa00d
2008-08-27 13:51:39 +00:00
parent f539fce7e1
commit d1283bc54e
6 changed files with 684 additions and 3 deletions
--- a/include/audio_portaudio.h
+++ b/include/audio_portaudio.h
@@ -0,0 +1,119 @@
+/*
+ * audio_portaudio.h - device-class that performs PCM-output via PortAudio
+ *
+ * Copyright (c) 2008 Csaba Hruska <csaba.hruska/at/gmail.com>
+ * 
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#ifndef _AUDIO_PORTAUDIO_H
+#define _AUDIO_PORTAUDIO_H
+
+#include <QtCore/QObject>
+
+#include "lmmsconfig.h"
+#include "combobox_model.h"
+
+class audioPortAudioSetupUtil : public QObject
+{
+	Q_OBJECT
+public slots:
+	void updateDevices( void );
+	void updateChannels( void );
+		
+public:
+	comboBoxModel m_backendModel;
+	comboBoxModel m_deviceModel;
+} ;
+
+
+#ifdef LMMS_HAVE_PORTAUDIO
+
+#include <portaudio.h>
+
+#include "audio_device.h"
+
+
+class comboBox;
+class lcdSpinBox;
+
+
+class audioPortAudio : public audioDevice
+{
+public:
+	audioPortAudio( bool & _success_ful, mixer * _mixer );
+	virtual ~audioPortAudio();
+
+	inline static QString name( void )
+	{
+		return( QT_TRANSLATE_NOOP( "setupWidget",
+					"PortAudio" ) );
+	}
+
+
+	int process_callback( const float *_inputBuffer,
+		float * _outputBuffer,
+		unsigned long _framesPerBuffer );
+
+
+	class setupWidget : public audioDevice::setupWidget
+	{
+	public:
+		setupWidget( QWidget * _parent );
+		virtual ~setupWidget();
+
+		virtual void saveSettings( void );
+
+	private:
+		comboBox * m_backend;
+		comboBox * m_device;
+		lcdSpinBox * m_channels;
+		audioPortAudioSetupUtil m_setupUtil;
+
+	} ;
+
+private:
+	virtual void startProcessing( void );
+	virtual void stopProcessing( void );
+	virtual void applyQualitySettings( void );
+
+	static int _process_callback( const void *_inputBuffer, void *_outputBuffer,
+		unsigned long _framesPerBuffer,
+		const PaStreamCallbackTimeInfo* _timeInfo,
+		PaStreamCallbackFlags _statusFlags,
+		void *arg );
+
+	PaStream * m_paStream;
+	PaStreamParameters m_outputParameters;
+	PaStreamParameters m_inputParameters;
+	bool m_wasPAInitError;
+ 
+	surroundSampleFrame * m_outBuf;
+	int m_outBuf_pos;
+	int m_outBuf_size;
+
+	bool m_stopped;
+	QSemaphore m_stop_semaphore;
+
+} ;
+
+#endif
+
+#endif