AudioPA.hxx

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#ifndef AUDIO_PA_HDR
#define AUDIO_PA_HDR

/*
  Copyright (c) 2012, Matthew H. Reilly (kb1vc)
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:

  Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in
  the documentation and/or other materials provided with the
  distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "SoDaBase.hxx"
#include "AudioIfc.hxx"

#include <boost/format.hpp>
#if HAVE_LIBPORTAUDIO
#  include <portaudio.h>
#  define PORTAUDIO_DEF
#else 
#  define PORTAUDIO_DEF { throw SoDa::SoDaException("PortAudio Library is not enabled in this build version."); }
#endif
#include <iostream>
#include <stdexcept>

namespace SoDa {
  class AudioPA : public AudioIfc {
  public:
    AudioPA(unsigned int _sample_rate, AudioIfc::DataFormat _fmt, unsigned int _sample_count_hint = 1024) ;

    ~AudioPA() { }
    int send(void * buf, unsigned int len) { (void) buf; (void) len; PORTAUDIO_DEF }

    bool sendBufferReady(unsigned int len) { (void) len; PORTAUDIO_DEF } 

    int recv(void * buf, unsigned int len, bool block = true) { (void) buf; (void) len; (void) block; PORTAUDIO_DEF }

    bool recvBufferReady(unsigned int len) { (void) len; PORTAUDIO_DEF }

    void sleepOut() {
#if HAVE_LIBPORTAUDIO
      pa_stat = Pa_StopStream(pa_outstream);
      if(pa_stat != paStreamIsStopped) checkStatus(pa_stat, "sleepOut");      
#endif
    }
    void wakeOut() {
#if HAVE_LIBPORTAUDIO
      pa_stat = Pa_StartStream(pa_outstream);
      if(pa_stat != paStreamIsNotStopped) checkStatus(pa_stat, "wakeOut");
#endif
    }
        
    void sleepIn() {
#if HAVE_LIBPORTAUDIO
      pa_stat = Pa_StopStream(pa_instream);
      if(pa_stat != paStreamIsStopped) checkStatus(pa_stat, "sleepIn");      
#endif
    }
    void wakeIn() {
#if HAVE_LIBPORTAUDIO
      pa_stat = Pa_StartStream(pa_instream);
      if(pa_stat != paStreamIsNotStopped) checkStatus(pa_stat, "wakeIn");
#endif
    }

  protected:
#if HAVE_LIBPORTAUDIO    
    PaStream * pa_instream; 
    PaStream * pa_outstream; 
    PaError pa_stat; 

    
    PaSampleFormat translateFormat(AudioIfc::DataFormat fmt) PORTAUDIO_DEF ;
#endif
    
#if HAVE_LIBPORTAUDIO 
    void checkStatus(PaError v, const std::string & exp, bool fatal = false) {

      if (v != paNoError) {
    if(fatal) throw SoDaException((boost::format("%s %s") % exp % Pa_GetErrorText(v)).str(), this);
    else std::cerr << boost::format("%s: %s %s\n") % getObjName() % exp % Pa_GetErrorText(v);
      }
    }
#endif
  };
}


#endif