Music 3SI

 Sender		--(Signal)-->	   Receiver  	----	Slot 1
[Widget]	  [Action]	    [Form]	 |-	Slot 2
							...
						 |-	Slot n

/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you want to add, delete, or rename functions or slots, use
** Qt Designer to update this file, preserving your code.
**
** You should not define a constructor or destructor in this file.
** Instead, write your code in functions called init() and destroy().
** These will automatically be called by the form's constructor and
** destructor.
*****************************************************************************/


// Stk header files
#include "BeeThree.h"
#include "RtAudio.h"

// Callback function
int tick(char *buffer, int bufferSize, void *dataPointer) {
  BeeThree *beethree = (BeeThree *) dataPointer;
  StkFloat *samples = (StkFloat *) buffer;

  for ( int i=0; i<bufferSize; i++ )
    *samples++ = beethree->tick();

  return 0;
}

// Pointers to Stk instances
BeeThree* _beethree;
RtAudio* _dac;

// Slot for slider signal
void BeeThreeForm::_pitchSliderMoved()
{
  printf("slider moved!\n");
  int pitch = _pitchSlider->value();                  // _pitchSlider: see QSlider
  _beethree->setFrequency((float) pitch);
  _pitchEdit->setText(QString::number( pitch, 10) );  // _pitchEdit: see QLineEdit
}

// Slot for line edit signal
void BeeThreeForm::_pitchEditEntered()
{
  printf("edit entered!\n");
  bool ok;
  int pitch = _pitchEdit->text().toInt(&ok, 10);
  if (ok) {
    _beethree->setFrequency((float) pitch);
    _pitchSlider->setValue(pitch);
  }
}

// Slot for start button
void BeeThreeForm::_startButtonClicked()
{
  printf("start!\n");
  _dac->setStreamCallback(&tick, (void *)_beethree);
  _dac->startStream();
}

// Slot for stop button
void BeeThreeForm::_stopButtonClicked()
{
  printf("stop!\n");
  _dac->stopStream();
  _dac->cancelStreamCallback();
}

// Initialization
void BeeThreeForm::init()
{
  printf("init!\n");
  Stk::setSampleRate( 44100.0 );

  float frequency = (float) _pitchSlider->value();

  _beethree = new BeeThree();
  _beethree->noteOn( frequency, 0.7 );

  RtAudioFormat format = ( sizeof(StkFloat) == 8 ) ? RTAUDIO_FLOAT64:RTAUDIO_FLOAT32;
  int bufferSize = RT_BUFFER_SIZE;
  _dac = new RtAudio(0, 1, 0, 0, format, (int)Stk::sampleRate(), &bufferSize, 0);
}

// Destruction
void BeeThreeForm::destroy()
{
  printf("destroy!\n");
  delete _dac;
  delete _beethree;
}