PipeWireDevice.h

Go to the documentation of this file.

/*******************************************************************************
 * 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 <condition_variable>
#include <thread>
#include <pipewire/pipewire.h>
#include <spa/utils/ringbuffer.h>
 
#include "devices/SoftwareDevice.h"
 
AUD_NAMESPACE_BEGIN

class AUD_PLUGIN_API PipeWireDevice : public SoftwareDevice
{
private:
    class PipeWireSynchronizer : public DefaultSynchronizer
    {
        PipeWireDevice* m_device;
        bool m_playing = false;
        bool m_get_tick_start = false;
        int64_t m_tick_start = 0.0f;
        double m_seek_pos = 0.0f;
 
    public:
        PipeWireSynchronizer(PipeWireDevice* device);
 
        void updateTickStart();
        virtual void play();
        virtual void stop();
        virtual void seek(std::shared_ptr<IHandle> handle, double time);
        virtual double getPosition(std::shared_ptr<IHandle> handle);
    };

    PipeWireSynchronizer m_synchronizer;

    bool m_fill_ringbuffer;
 
    pw_stream* m_stream;
    pw_thread_loop* m_thread;
    std::unique_ptr<pw_stream_events> m_events;

    std::thread m_mixingThread;
    bool m_run_mixing_thread;

    std::mutex m_mixingLock;

    spa_ringbuffer m_ringbuffer;
    Buffer m_ringbuffer_data;
    std::condition_variable m_mixingCondition;
 
    AUD_LOCAL static void handleStateChanged(void* device_ptr, enum pw_stream_state old, enum pw_stream_state state, const char* error);

    AUD_LOCAL void updateRingBuffers();

    AUD_LOCAL static void mixAudioBuffer(void* device_ptr);
 
    // delete copy constructor and operator=
    PipeWireDevice(const PipeWireDevice&) = delete;
    PipeWireDevice& operator=(const PipeWireDevice&) = delete;
 
protected:
    virtual void playing(bool playing);
 
public:
    PipeWireDevice(const std::string& name, DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);

    virtual ~PipeWireDevice();
 
    virtual ISynchronizer* getSynchronizer();
    static void registerPlugin();
};
 
AUD_NAMESPACE_END