Class: Portaudio

Inherits:
Object
  • Object
show all
Defined in:
ext/portaudio/portaudio.c

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.new ⇒ Object 



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# File 'ext/portaudio/portaudio.c', line 54

VALUE rb_portaudio_new(VALUE klass)
{
  PaStreamParameters outputParameters;
  const PaDeviceInfo *deviceInfo;
  PaError err;
  int device, numDevices;
  VALUE self;
  Portaudio *portaudio = (Portaudio *) malloc(sizeof(Portaudio));

  pthread_mutex_init(&portaudio->mutex, NULL);
  pthread_cond_init(&portaudio->cond, NULL);

  portaudio->size = 4096 * 2;
  portaudio->buffer = (float *) malloc(sizeof(float) * portaudio->size);

  err = Pa_OpenDefaultStream(&portaudio->stream,
                             0,           /* no input channels */
                             2,           /* stereo output */
                             paFloat32,   /* 32 bit floating point output */
                             44100,       /* 44100 sample rate*/
                             4096,        /* frames per buffer */
                             paCallback,  /* this is your callback function */
                             (void*) portaudio);

  if (err != paNoError) {
    rb_raise(rb_eStandardError, "%s", Pa_GetErrorText(err));
  }

  self = Data_Wrap_Struct(rb_cPortaudio, 0, free_portaudio, portaudio);

  return self;
}

Instance Method Details

#start ⇒ Object 



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# File 'ext/portaudio/portaudio.c', line 118

VALUE rb_portaudio_start(VALUE self)
{
  Portaudio *portaudio;
  Data_Get_Struct(self, Portaudio, portaudio);
  int err = Pa_StartStream(portaudio->stream);

  pthread_cond_broadcast(&portaudio->cond);

  if (err != paNoError) {
    rb_raise(rb_eStandardError, "%s", Pa_GetErrorText(err));
  }

  return self;
}

#stop ⇒ Object 



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# File 'ext/portaudio/portaudio.c', line 133

VALUE rb_portaudio_stop(VALUE self)
{
  Portaudio *portaudio;
  Data_Get_Struct(self, Portaudio, portaudio);
  int err = Pa_StopStream(portaudio->stream);

  pthread_cond_broadcast(&portaudio->cond);

  if (err != paNoError) {
    rb_raise(rb_eStandardError, "%s", Pa_GetErrorText(err));
  }

  return self;
}

#write(buffer) ⇒ Object 



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# File 'ext/portaudio/portaudio.c', line 97

VALUE rb_portaudio_write(VALUE self, VALUE buffer)
{
  int i;
  Portaudio *portaudio;
  Data_Get_Struct(self, Portaudio, portaudio);

  Check_Type(buffer, T_ARRAY);

  for (i = 0; i < portaudio->size; i++) {
    portaudio->buffer[i] = NUM2DBL(rb_ary_entry(buffer, i));
  }

#ifdef RUBY_UBF_IO
  rb_thread_blocking_region(portaudio_wait, portaudio, RUBY_UBF_IO, NULL);
#else
  portaudio_wait(portaudio);
#endif

  return self;
}