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119 lines
2.3 KiB
C++
119 lines
2.3 KiB
C++
/*
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* AudioDummy.h - dummy audio-device
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*
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* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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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_DUMMY_H
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#define AUDIO_DUMMY_H
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#include "AudioDevice.h"
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#include "AudioDeviceSetupWidget.h"
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#include "MicroTimer.h"
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#include "Mixer.h"
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class AudioDummy : public QThread, public AudioDevice
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{
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Q_OBJECT
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public:
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AudioDummy( bool & _success_ful, Mixer* mixer ) :
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AudioDevice( DEFAULT_CHANNELS, mixer )
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{
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_success_ful = true;
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}
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virtual ~AudioDummy()
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{
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stopProcessing();
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}
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inline static QString name()
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{
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return QT_TRANSLATE_NOOP( "AudioDeviceSetupWidget", "Dummy (no sound output)" );
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}
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class setupWidget : public AudioDeviceSetupWidget
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{
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public:
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setupWidget( QWidget * _parent ) :
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AudioDeviceSetupWidget( AudioDummy::name(), _parent )
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{
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}
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virtual ~setupWidget()
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{
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}
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void saveSettings() override
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{
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}
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void show() override
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{
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parentWidget()->hide();
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QWidget::show();
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}
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} ;
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private:
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void startProcessing() override
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{
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start();
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}
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void stopProcessing() override
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{
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stopProcessingThread( this );
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}
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void run() override
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{
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MicroTimer timer;
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while( true )
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{
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timer.reset();
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const surroundSampleFrame* b = mixer()->nextBuffer();
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if( !b )
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{
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break;
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}
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if( mixer()->hasFifoWriter() )
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{
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delete[] b;
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}
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const int microseconds = static_cast<int>( mixer()->framesPerPeriod() * 1000000.0f / mixer()->processingSampleRate() - timer.elapsed() );
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if( microseconds > 0 )
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{
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usleep( microseconds );
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}
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}
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}
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} ;
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#endif
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