mipjackinput.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 MIPJACKINPUT_H

#define MIPJACKINPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_JACK

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

class MIPRawFloatAudioMessage;

class EMIPLIB_IMPORTEXPORT MIPJackInput : public MIPComponent, public jthread::JThread
{
public:
        MIPJackInput();
        ~MIPJackInput();

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

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

        bool close();

        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);
        void *Thread();
        
        class RecordBuffer
        {
        public:
                RecordBuffer(size_t bufSize)                                            { m_pLeftBuffer = new jack_default_audio_sample_t [bufSize]; m_pRightBuffer = new jack_default_audio_sample_t [bufSize]; }
                ~RecordBuffer()                                                         { delete [] m_pLeftBuffer; delete [] m_pRightBuffer; }
                jack_default_audio_sample_t *getLeftBuffer()                            { return m_pLeftBuffer; }
                jack_default_audio_sample_t *getRightBuffer()                           { return m_pRightBuffer; }
                void setOffset(size_t o)                                                { m_offset = o; }
                size_t getOffset() const                                                { return m_offset; }
        private:
                jack_default_audio_sample_t *m_pLeftBuffer, *m_pRightBuffer;
                size_t m_offset;
        };
        
        jack_client_t *m_pClient;
        jack_port_t *m_pLeftInput;
        jack_port_t *m_pRightInput;
        
        int m_sampRate;
        size_t m_blockSize;
        float *m_pLastInputCopy;
        float *m_pMsgBuffer;
        size_t m_bufSize;
        size_t m_frames;
        RecordBuffer **m_pRecordBuffers;
        int m_numBuffers;
        int m_curBuffer;
        int m_curReadBuffer;
        size_t m_availableFrames;
        MIPRawFloatAudioMessage *m_pMsg;
        bool m_gotLastInput;
        bool m_gotMsg;
        bool m_stopThread;
        MIPSignalWaiter m_sigWait, m_sigWait2;
        jthread::JMutex m_frameMutex, m_blockMutex, m_stopMutex;
        MIPTime m_interval, m_sampleInstant;
};

#endif // MIPCONFIG_SUPPORT_JACK

#endif // MIPJACKINPUT_H