PulseAudioDevice.h

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/*******************************************************************************
 * Copyright 2009-2016 Jörg Müller
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

#pragma once

#ifdef PULSEAUDIO_PLUGIN
#define AUD_BUILD_PLUGIN
#endif

#include <pulse/pulseaudio.h>

#include "devices/MixingThreadDevice.h"

AUD_NAMESPACE_BEGIN

class AUD_PLUGIN_API PulseAudioDevice : public MixingThreadDevice
{
private:
    bool m_corked;

    pa_threaded_mainloop* m_mainloop;
    pa_context* m_context;
    pa_stream* m_stream;
    pa_context_state_t m_state;

    int m_buffersize;
    uint32_t m_underflows;

    pa_usec_t m_synchronizerStartTime{0};
    double m_synchronizerStartPosition{0.0};

    AUD_LOCAL void preMixingWork(bool playing) override;

    AUD_LOCAL static void PulseAudio_state_callback(pa_context* context, void* data);

    AUD_LOCAL static void PulseAudio_request(pa_stream* stream, size_t total_bytes, void* data);

    // delete copy constructor and operator=
    PulseAudioDevice(const PulseAudioDevice&) = delete;
    PulseAudioDevice& operator=(const PulseAudioDevice&) = delete;

protected:
    virtual void playing(bool playing);

public:
    PulseAudioDevice(const std::string &name, DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);

    virtual ~PulseAudioDevice();

    virtual void seekSynchronizer(double time);
    virtual double getSynchronizerPosition();
    virtual void playSynchronizer();
    virtual void stopSynchronizer();

    static void registerPlugin();
};

AUD_NAMESPACE_END