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6f50f90b9c
Removes the FIFO writer thread in the audio engine to simplify inter-thread communication and avoid deadlock bugs. --------- Co-authored-by: szeli1 <143485814+szeli1@users.noreply.github.com> Co-authored-by: Dalton Messmer <messmer.dalton@gmail.com>
106 lines
2.9 KiB
C++
106 lines
2.9 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 "LmmsTypes.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 AudioBusHandle;
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class SampleFrame;
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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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// if audio-driver supports ports, classes inheriting AudioBusHandle
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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(AudioBusHandle* port);
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virtual void unregisterPort(AudioBusHandle* port);
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virtual void renamePort(AudioBusHandle* 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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void startProcessing();
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void stopProcessing();
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bool isRunning() const { return m_running.test(std::memory_order_acquire); }
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protected:
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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 SampleFrame* _ab, const f_cnt_t _frames, 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, const f_cnt_t _frames);
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ch_cnt_t channels() const { return m_channels; }
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AudioEngine* audioEngine() { return m_audioEngine; }
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void setSampleRate(const sample_rate_t _new_sr) { m_sampleRate = _new_sr; }
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void setChannels(const ch_cnt_t channels) { m_channels = channels; }
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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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virtual void startProcessingImpl() = 0;
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virtual void stopProcessingImpl() = 0;
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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 = nullptr;
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std::atomic_flag m_running = ATOMIC_FLAG_INIT;
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};
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} // namespace lmms
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#endif // LMMS_AUDIO_DEVICE_H
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