mirror of
https://github.com/LMMS/lmms.git
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b4e38e3978
This commit fixes lockup of the whole audio engine as soon as LMMS' JACK backend got zombified due to longer delays (e.g. when audio engine is blocked while loading a project). Restart JACK backend in such cases and show an according message to the user. Furthermore this commit includes various cleanups and improvements.
129 lines
2.7 KiB
C++
129 lines
2.7 KiB
C++
/*
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* audio_jack.h - support for JACK-transport
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*
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* Copyright (c) 2005-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _AUDIO_JACK_H
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#define _AUDIO_JACK_H
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#include "lmmsconfig.h"
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#ifdef LMMS_HAVE_JACK
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#include <jack/jack.h>
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#endif
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#include <QtCore/QVector>
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#include <QtCore/QList>
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#include <QtCore/QMap>
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#include "audio_device.h"
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class QLineEdit;
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class lcdSpinBox;
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class audioJACK : public QObject, public audioDevice
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{
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Q_OBJECT
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public:
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audioJACK( bool & _success_ful, mixer * _mixer );
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virtual ~audioJACK();
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inline static QString name( void )
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{
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return QT_TRANSLATE_NOOP( "setupWidget",
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"JACK (JACK Audio Connection Kit)" );
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}
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class setupWidget : public audioDevice::setupWidget
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{
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public:
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setupWidget( QWidget * _parent );
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virtual ~setupWidget();
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virtual void saveSettings( void );
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private:
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QLineEdit * m_clientName;
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lcdSpinBox * m_channels;
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} ;
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private slots:
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void restartAfterZombified( void );
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#ifdef LMMS_HAVE_JACK
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private:
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bool initJackClient( void );
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virtual void startProcessing( void );
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virtual void stopProcessing( void );
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virtual void applyQualitySettings( void );
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virtual void registerPort( audioPort * _port );
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virtual void unregisterPort( audioPort * _port );
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virtual void renamePort( audioPort * _port );
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int processCallback( jack_nframes_t _nframes, void * _udata );
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static int staticProcessCallback( jack_nframes_t _nframes,
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void * _udata );
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static void shutdownCallback( void * _udata );
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jack_client_t * m_client;
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bool m_active;
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bool m_stopped;
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QSemaphore m_stopSemaphore;
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QVector<jack_port_t *> m_outputPorts;
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sampleFrameA * m_outBuf;
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f_cnt_t m_framesDoneInCurBuf;
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f_cnt_t m_framesToDoInCurBuf;
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struct stereoPort
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{
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jack_port_t * ports[2];
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} ;
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typedef QMap<audioPort *, stereoPort> jackPortMap;
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jackPortMap m_portMap;
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#endif
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signals:
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void zombified( void );
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} ;
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#endif
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