152 lines
3.6 KiB
C++
152 lines
3.6 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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#ifdef PULSEAUDIO_PLUGIN
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#define AUD_BUILD_PLUGIN
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#endif
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/**
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* @file PulseAudioDevice.h
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* @ingroup plugin
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* The PulseAudioDevice class.
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*/
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#include "devices/SoftwareDevice.h"
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#include "util/RingBuffer.h"
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#include <condition_variable>
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#include <thread>
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#include <pulse/pulseaudio.h>
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AUD_NAMESPACE_BEGIN
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/**
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* This device plays back through PulseAudio, the simple direct media layer.
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*/
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class AUD_PLUGIN_API PulseAudioDevice : public SoftwareDevice
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{
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private:
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class PulseAudioSynchronizer : public DefaultSynchronizer
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{
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PulseAudioDevice* m_device;
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public:
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PulseAudioSynchronizer(PulseAudioDevice* device);
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virtual double getPosition(std::shared_ptr<IHandle> handle);
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};
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/// Synchronizer.
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PulseAudioSynchronizer m_synchronizer;
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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;
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/**
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* Set when playback is paused in order to later clear the ring buffer when the playback starts again.
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*/
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volatile bool m_clear;
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pa_threaded_mainloop* m_mainloop;
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pa_context* m_context;
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pa_stream* m_stream;
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pa_context_state_t m_state;
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/**
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* The mixing ring buffer.
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*/
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RingBuffer m_ring_buffer;
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/**
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* Whether the device is valid.
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*/
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bool m_valid;
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int m_buffersize;
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uint32_t m_underflows;
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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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/**
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* Reports the state of the PulseAudio server connection.
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* \param context The PulseAudio context.
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* \param data The PulseAudio device.
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*/
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AUD_LOCAL static void PulseAudio_state_callback(pa_context* context, void* data);
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/**
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* Supplies the next samples to PulseAudio.
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* \param stream The PulseAudio stream.
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* \param num_bytes The length in bytes to be supplied.
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* \param data The PulseAudio device.
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*/
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AUD_LOCAL static void PulseAudio_request(pa_stream* stream, size_t total_bytes, void* data);
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// delete copy constructor and operator=
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PulseAudioDevice(const PulseAudioDevice&) = delete;
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PulseAudioDevice& operator=(const PulseAudioDevice&) = delete;
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protected:
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virtual void playing(bool playing);
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public:
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/**
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* Opens the PulseAudio audio device for playback.
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* \param specs The wanted audio specification.
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* \param buffersize The size of the internal buffer.
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* \note The specification really used for opening the device may differ.
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* \exception Exception Thrown if the audio device cannot be opened.
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*/
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PulseAudioDevice(const std::string &name, DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);
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/**
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* Closes the PulseAudio audio device.
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*/
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virtual ~PulseAudioDevice();
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virtual ISynchronizer* getSynchronizer();
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/**
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* Registers this plugin.
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*/
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static void registerPlugin();
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};
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AUD_NAMESPACE_END
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