mipjackoutput.h

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/*
    
  This file is a part of EMIPLIB, the EDM Media over IP Library.
  
  Copyright (C) 2006-2011  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef MIPJACKOUTPUT_H

#define MIPJACKOUTPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_JACK

#include "mipcomponent.h"
#include "miptime.h"
#include <jack/jack.h>
#include <jthread/jmutex.h>
#include <string>

class EMIPLIB_IMPORTEXPORT MIPJackOutput : public MIPComponent
{
public:
        MIPJackOutput();
        ~MIPJackOutput();

        bool open(MIPTime interval = MIPTime(0.020), const std::string &serverName = std::string(""), MIPTime arrayTime = MIPTime(10.0));

        bool close();

        int getSamplingRate() const                                                             { if (m_pClient == 0) return 0; return m_sampRate; }

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        static int StaticJackCallback(jack_nframes_t nframes, void *arg);
        int JackCallback(jack_nframes_t nframes);
        
        jack_client_t *m_pClient;
        jack_port_t *m_pLeftOutput;
        jack_port_t *m_pRightOutput;
        
        int m_sampRate;
        float *m_pFrameArrayLeft;
        float *m_pFrameArrayRight;
        size_t m_frameArrayLength;
        size_t m_currentPos, m_nextPos;
        size_t m_blockLength, m_intervalLength;
        MIPTime m_delay;
        MIPTime m_distTime, m_blockTime, m_interval;
        jthread::JMutex m_frameMutex;
};

#endif // MIPCONFIG_SUPPORT_JACK

#endif // MIPJACKOUTPUT_H