PipeWireDevice.h

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/*******************************************************************************
 * Copyright 2009-2024 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 PIPEWIRE_PLUGIN
#define AUD_BUILD_PLUGIN
#endif

#include <pipewire/pipewire.h>

#include "devices/MixingThreadDevice.h"

AUD_NAMESPACE_BEGIN

class AUD_PLUGIN_API PipeWireDevice : public MixingThreadDevice
{
private:
    pw_stream* m_stream;
    pw_thread_loop* m_thread;
    std::unique_ptr<pw_stream_events> m_events;
    bool m_active{false};

    bool m_getSynchronizerStartTime{false};
    int64_t m_synchronizerStartTime{0};
    double m_synchronizerStartPosition{0.0};

    AUD_LOCAL static void handleStateChanged(void* device_ptr, enum pw_stream_state old, enum pw_stream_state state, const char* error);

    AUD_LOCAL static void mixAudioBuffer(void* device_ptr);

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

protected:
    void preMixingWork(bool playing);
    virtual void playing(bool playing);

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

    virtual ~PipeWireDevice();

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

    static void registerPlugin();
};

AUD_NAMESPACE_END