JackDevice.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 JACK_PLUGIN
#define AUD_BUILD_PLUGIN
#endif

 
#include <atomic>
#include <condition_variable>
#include <string>
#include <thread>
 
#include <jack/jack.h>
 
#include "devices/MixingThreadDevice.h"
#include "util/Buffer.h"
 
AUD_NAMESPACE_BEGIN

class AUD_PLUGIN_API JackDevice : public MixingThreadDevice
{
private:
    jack_port_t** m_ports;

    jack_client_t* m_client;

    Buffer m_deinterleavebuf;

    AUD_LOCAL static void jack_shutdown(void* data);

    AUD_LOCAL static int jack_mix(jack_nframes_t length, void* data);
 
    AUD_LOCAL static int jack_sync(jack_transport_state_t state, jack_position_t* pos, void* data);

    jack_transport_state_t m_lastState;

    jack_transport_state_t m_lastMixState;

    std::atomic<float> m_syncTime;

    std::atomic<int> m_syncCallRevision;

    std::atomic<int> m_lastSyncCallRevision;

    int m_rollingSyncRevision;

    int m_lastRollingSyncRevision;

    syncFunction m_syncFunc;

    void* m_syncFuncData;
 
    AUD_LOCAL void preMixingWork(bool playing) override;
 
    // delete copy constructor and operator=
    JackDevice(const JackDevice&) = delete;
    JackDevice& operator=(const JackDevice&) = delete;
 
protected:
    virtual void playing(bool playing);
 
public:
    JackDevice(const std::string &name, DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);

    virtual ~JackDevice();

    void playSynchronizer();

    void stopSynchronizer();

    void seekSynchronizer(double time);

    void setSyncCallback(syncFunction sync, void* data);

    double getSynchronizerPosition();

    int isSynchronizerPlaying();

    static void registerPlugin();
};
 
AUD_NAMESPACE_END