mippainputoutput.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 MIPPAINPUTOUTPUT_H

#define MIPPAINPUTOUTPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_PORTAUDIO

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

class MIPRaw16bitAudioMessage;
class MIPStreamBuffer;

class EMIPLIB_IMPORTEXPORT MIPPAInputOutput : public MIPComponent
{
public:
        enum AccessMode { ReadOnly, WriteOnly, ReadWrite };
        
        MIPPAInputOutput();
        ~MIPPAInputOutput();
        
        bool open(int sampRate, int channels, MIPTime interval, AccessMode accessMode = WriteOnly, 
                  MIPTime bufferTime = MIPTime(10.0));
        
        bool close();

        static bool initializePortAudio(std::string &errorString);
        
        static void terminatePortAudio();
        
        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        static int staticPACallback(const void *pInput, void *pOutput, unsigned long frameCount, const PaStreamCallbackTimeInfo *pTimeInfo, PaStreamCallbackFlags statusFlags, void *pUserData);
        int portAudioCallback(const void *pInput, void *pOutput, unsigned long frameCount, const PaStreamCallbackTimeInfo *pTimeInfo, PaStreamCallbackFlags statusFlags);
        
        PaStream *m_pStream;
        int m_sampRate;
        int m_channels;
        AccessMode m_accessMode;
        size_t m_blockFrames, m_blockBytes;
        MIPStreamBuffer *m_pOutputBuffer, *m_pInputBuffer;

        bool m_gotMsg;
        MIPSignalWaiter m_sigWait;
        MIPRaw16bitAudioMessage *m_pMsg;
        uint16_t *m_pMsgBuffer;
        bool m_gotLastInput;
};

#endif // MIPCONFIG_SUPPORT_PORTAUDIO

#endif // MIPPAINPUTOUTPUT_H