e4792cb4e7
Fixes #135897 by introducing a mixing thread to coreaudio, making the callback lock free. At the same time these changes unify all devices that use a mixing thread (now that's jack, pulse, pipewire and coreaudio). Pull Request: https://projects.blender.org/blender/blender/pulls/136711
132 lines
2.8 KiB
C++
132 lines
2.8 KiB
C++
/*******************************************************************************
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* Copyright 2009-2016 Jörg Müller
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#pragma once
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/**
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* @file MixingThreadDevice.h
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* @ingroup device
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* The MixingThreadDevice class.
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*/
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#include <condition_variable>
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#include <thread>
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#include "devices/SoftwareDevice.h"
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#include "util/RingBuffer.h"
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AUD_NAMESPACE_BEGIN
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/**
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* This device extends the SoftwareDevice with code for running mixing in a separate thread.
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*/
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class AUD_PLUGIN_API MixingThreadDevice : public SoftwareDevice
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{
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private:
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/**
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* Whether there is currently playback.
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*/
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volatile bool m_playback{false};
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/**
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* The deinterleaving buffer.
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*/
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Buffer m_mixingBuffer;
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/**
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* The mixing ring buffer.
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*/
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RingBuffer m_ringBuffer;
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/**
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* Whether the device is valid.
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*/
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bool m_valid{false};
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/**
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* The mixing thread.
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*/
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std::thread m_mixingThread;
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/**
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* Mutex for mixing.
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*/
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std::mutex m_mixingLock;
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/**
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* Condition for mixing.
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*/
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std::condition_variable m_mixingCondition;
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/**
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* Updates the ring buffer.
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*/
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AUD_LOCAL void updateRingBuffer();
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// delete copy constructor and operator=
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MixingThreadDevice(const MixingThreadDevice&) = delete;
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MixingThreadDevice& operator=(const MixingThreadDevice&) = delete;
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protected:
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/**
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* Starts the streaming thread.
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* @param buffersize Size of the ring buffer in bytes.
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*/
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void startMixingThread(size_t buffersize);
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/**
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* Notify the mixing thread.
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*/
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void notifyMixingThread();
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/**
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* Get ring buffer for reading.
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*/
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inline RingBuffer& getRingBuffer()
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{
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return m_ringBuffer;
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}
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/**
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* Returns whether the thread is running or not.
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*/
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inline bool isMixingThreadRunning()
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{
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return m_valid;
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}
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virtual void playing(bool playing);
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/**
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* Called every iteration in the mixing thread before mixing.
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*/
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virtual void preMixingWork(bool playing);
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/**
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* Empty default constructor. To setup the device call the function create()
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* and to uninitialize call destroy().
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*/
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MixingThreadDevice();
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/**
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* Stops all playback and notifies the mixing thread to stop.
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* \warning The device has to be unlocked to not run into a deadlock.
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*/
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void stopMixingThread();
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};
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AUD_NAMESPACE_END
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