using kit_w32 audio callbacks

#include <kit/audio.hpp>

using namespace kit;


#define FORMULA t*(42&t>>10) //the elusive 42 melody~
#define TARGET_SAMPLE_RATE 8000
u64 _t = KIT_U64_MAX;

s32 audio_callback(const void* _input, void* _output,
                   const AudioStreamInfo* info, void* userdata)
{
  (void)_input;
  u8* output = (u8*)_output;

  u32 numSamples = info->sampleFrames;
  f64 sampleRate = info->sampleRate;
  f64 rateRatio  = (f64)TARGET_SAMPLE_RATE/sampleRate;


  for(u32 i=0; i<numSamples; ++i){
    u64 t = (u64)((++_t)*rateRatio);
    output[i] = (u8)( FORMULA );
  }

  return ASTREAM_RTN_CONTINUE;
}




int main(int argc, char** argv){

  AudioStreamParams params;
  params.callback       = audio_callback;
  params.outputDeviceID = audio::getDefOutputDevice();
  params.outputFormat   = ASTREAM_FMT_U8;
  params.outputChannels = 1;

  AudioStream stream(&params);

  stream.start();
  time::sleep(8300); //plays 1 loop of 42 melody bytebeat
  stream.stop();

  return 0;
}