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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).
143 lines
3.2 KiB
C++
143 lines
3.2 KiB
C++
/*
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* AudioDevice.h - base-class for audio-devices, used by LMMS audio engine
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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_DEVICE_H
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#define LMMS_AUDIO_DEVICE_H
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#include <QMutex>
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#include <samplerate.h>
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#include "lmms_basics.h"
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class QThread;
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namespace lmms
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{
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class AudioEngine;
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class AudioPort;
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class AudioDevice
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{
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public:
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AudioDevice( const ch_cnt_t _channels, AudioEngine* audioEngine );
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virtual ~AudioDevice();
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inline void lock()
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{
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m_devMutex.lock();
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}
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inline void unlock()
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{
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m_devMutex.unlock();
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}
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// if audio-driver supports ports, classes inherting AudioPort
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// (e.g. channel-tracks) can register themselves for making
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// audio-driver able to collect their individual output and provide
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// them at a specific port - currently only supported by JACK
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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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inline bool supportsCapture() const
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{
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return m_supportsCapture;
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}
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inline sample_rate_t sampleRate() const
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{
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return m_sampleRate;
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}
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ch_cnt_t channels() const
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{
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return m_channels;
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}
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void processNextBuffer();
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virtual void startProcessing()
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{
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m_inProcess = true;
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}
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virtual void stopProcessing();
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protected:
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// subclasses can re-implement this for being used in conjunction with
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// processNextBuffer()
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virtual void writeBuffer(const surroundSampleFrame* /* _buf*/, const fpp_t /*_frames*/) {}
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// called by according driver for fetching new sound-data
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fpp_t getNextBuffer( surroundSampleFrame * _ab );
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// convert a given audio-buffer to a buffer in signed 16-bit samples
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// returns num of bytes in outbuf
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int convertToS16( const surroundSampleFrame * _ab,
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const fpp_t _frames,
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int_sample_t * _output_buffer,
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const bool _convert_endian = false );
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// clear given signed-int-16-buffer
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void clearS16Buffer( int_sample_t * _outbuf,
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const fpp_t _frames );
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inline void setSampleRate( const sample_rate_t _new_sr )
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{
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m_sampleRate = _new_sr;
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}
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AudioEngine* audioEngine()
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{
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return m_audioEngine;
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}
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static void stopProcessingThread( QThread * thread );
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protected:
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bool m_supportsCapture;
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private:
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sample_rate_t m_sampleRate;
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ch_cnt_t m_channels;
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AudioEngine* m_audioEngine;
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bool m_inProcess;
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QMutex m_devMutex;
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surroundSampleFrame * m_buffer;
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};
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} // namespace lmms
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#endif // LMMS_AUDIO_DEVICE_H
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