C++ (Cpp) AudioData::reduceToMono Examples

Example #1

File: audiodatatest.cpp Project: PimpinFou/libKeyFinder

TEST (AudioDataTest, DownsamplerInsistsOnMonophonicAudio) {
  KeyFinder::AudioData a;
  a.setChannels(2);
  a.setFrameRate(100);
  a.addToSampleCount(10);

  ASSERT_THROW(a.downsample(5), KeyFinder::Exception);
  a.reduceToMono();
  ASSERT_NO_THROW(a.downsample(5));
}

Example #2

File: lowpassfiltertest.cpp Project: Quadrophone/libKeyFinder

TEST (LowPassFilterTest, InsistsOnMonophonicAudio) {
    KeyFinder::AudioData a;
    a.setChannels(2);
    a.setFrameRate(frameRate);
    a.addToSampleCount(frameRate);

    KeyFinder::LowPassFilter* lpf = new KeyFinder::LowPassFilter(filterOrder, frameRate, cornerFrequency, filterFFT);
    KeyFinder::Workspace w;
    ASSERT_THROW(lpf->filter(a, w), KeyFinder::Exception);
    a.reduceToMono();
    ASSERT_NO_THROW(lpf->filter(a, w));
    delete lpf;
}

Example #3

File: audiodatatest.cpp Project: PimpinFou/libKeyFinder

TEST (AudioDataTest, MakeMono) {
  KeyFinder::AudioData a;
  a.setChannels(2);
  a.addToSampleCount(20);
  for (int i = 0; i < 10; i++) {
    a.setSample(i * 2, 100.0);
  }
  a.reduceToMono();
  ASSERT_EQ(10, a.getSampleCount());
  for (int i = 0; i < 10; i++) {
    ASSERT_FLOAT_EQ(50.0, a.getSample(i));
  }
}

Example #4

File: asynckeyprocess.cpp Project: b0m0x/is_KeyFinder

KeyFinderResultWrapper keyDetectionProcess(const AsyncFileObject& object){

  KeyFinderResultWrapper result;
  result.batchRow = object.batchRow;

  // initialise stream and decode file into it.
  KeyFinder::AudioData* audio = NULL;
  AudioFileDecoder* decoder = NULL;
  try{
    decoder = AudioFileDecoder::getDecoder();
  }catch(KeyFinder::Exception& e){
    delete decoder;
    result.errorMessage = QString(e.what().c_str());
    return result;
  }

  try{
    audio = decoder->decodeFile(object.filePath);
    delete decoder;
  }catch(KeyFinder::Exception& e){
    delete audio;
    delete decoder;
    result.errorMessage = QString(e.what().c_str());
    return result;
  }

  // make audio stream monaural ahead of downsample to reduce load
  audio->reduceToMono();

  // downsample if necessary
  if(object.prefs.getDFactor() > 1){
    Downsampler* ds = Downsampler::getDownsampler(object.prefs.getDFactor(),audio->getFrameRate(),object.prefs.getLastFreq());
    try{
      audio = ds->downsample(audio,object.prefs.getDFactor());
    }catch(KeyFinder::Exception& e){
      delete audio;
      delete ds;
      result.errorMessage = QString(e.what().c_str());
      return result;
    }
    delete ds;
  }

  KeyFinder::KeyFinder* kf = LibKeyFinderSingleton::getInstance()->getKeyFinder();
  result.core = kf->findKey(*audio, object.prefs.core);

  delete audio;

  return result;
}