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https://github.com/LMMS/lmms.git
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9b6e33aa5c
Oversampling can have many different effects to the audio signal such as latency, phase issues, clipping, smearing, etc, so this should really be an option on a per-plugin basis, not globally across all of LMMS (which, in some places, shouldn't really need to oversample at all but were oversampled anyways).
120 lines
2.4 KiB
C++
120 lines
2.4 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 LMMS_AUDIO_DUMMY_H
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#define LMMS_AUDIO_DUMMY_H
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#include "AudioDevice.h"
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#include "AudioDeviceSetupWidget.h"
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#include "AudioEngine.h"
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#include "MicroTimer.h"
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namespace lmms
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{
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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, AudioEngine* audioEngine ) :
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AudioDevice( DEFAULT_CHANNELS, audioEngine )
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{
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_success_ful = true;
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}
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~AudioDummy() override
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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 gui::AudioDeviceSetupWidget
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{
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public:
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setupWidget( QWidget * _parent ) :
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gui::AudioDeviceSetupWidget( AudioDummy::name(), _parent )
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{
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}
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~setupWidget() override = default;
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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 = audioEngine()->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( audioEngine()->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>( audioEngine()->framesPerPeriod() * 1000000.0f / audioEngine()->outputSampleRate() - 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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} // namespace lmms
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#endif // LMMS_AUDIO_DUMMY_H
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