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 "JackSynchronizer.h"
#include "devices/SoftwareDevice.h"
#include "util/Buffer.h"
 
#include <string>
#include <condition_variable>
#include <thread>
#include <jack/jack.h>
#include <jack/ringbuffer.h>
 
AUD_NAMESPACE_BEGIN
 
class AUD_PLUGIN_API JackDevice : public SoftwareDevice
{
private:
    jack_port_t** m_ports;
 
    jack_client_t* m_client;
 
    Buffer m_buffer;
 
    Buffer m_deinterleavebuf;
 
    jack_ringbuffer_t** m_ringbuffers;
 
    bool m_valid;
 
    JackSynchronizer m_synchronizer;
 
    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_nextState;
 
    jack_transport_state_t m_state;
 
    int m_sync;
 
    ISynchronizer::syncFunction m_syncFunc;
 
    void* m_syncFuncData;
 
    std::thread m_mixingThread;
 
    std::mutex m_mixingLock;
 
    std::condition_variable m_mixingCondition;
 
    AUD_LOCAL void updateRingBuffers();
 
    // 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();
 
    virtual ISynchronizer* getSynchronizer();
 
    void startPlayback();
 
    void stopPlayback();
 
    void seekPlayback(double time);
 
    void setSyncCallback(ISynchronizer::syncFunction sync, void* data);
 
    double getPlaybackPosition();
 
    bool doesPlayback();
 
    static void registerPlugin();
};
 
AUD_NAMESPACE_END