C++ keyfinder::AudioData类代码示例

本文整理汇总了C++中keyfinder::AudioData类的典型用法代码示例。如果您正苦于以下问题：C++ AudioData类的具体用法？C++ AudioData怎么用？C++ AudioData使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了AudioData类的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1:

TEST (AudioDataTest, FrameMutatorBounds) {
  KeyFinder::AudioData a;
  a.setChannels(2);
  a.addToFrameCount(10);
  ASSERT_THROW(a.getSampleByFrame(-1, 0), KeyFinder::Exception);
  ASSERT_THROW(a.getSampleByFrame(10, 0), KeyFinder::Exception);
  ASSERT_THROW(a.getSampleByFrame( 0,-1), KeyFinder::Exception);
  ASSERT_THROW(a.getSampleByFrame( 0, 2), KeyFinder::Exception);
}

开发者ID:PimpinFou，项目名称:libKeyFinder，代码行数:9，代码来源:audiodatatest.cpp

示例2:

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;
}

开发者ID:Quadrophone，项目名称:libKeyFinder，代码行数:13，代码来源:lowpassfiltertest.cpp

示例3: keyDetectionProcess

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;
}

开发者ID:b0m0x，项目名称:is_KeyFinder，代码行数:50，代码来源:asynckeyprocess.cpp

示例4:

TEST(AudioDataTest, SamplesBasic){
  KeyFinder::AudioData a;
  a.addToSampleCount(100);
  ASSERT_EQ(100, a.getSampleCount());
  // init values
  for(int i=0; i<100; i++){
    ASSERT_EQ(0.0, a.getSample(i));
  }
  a.setSample(0, 10.0);
  ASSERT_EQ(10.0, a.getSample(0));
}

开发者ID:heyigor，项目名称:libKeyFinder，代码行数:11，代码来源:audiodatatest.cpp

示例5: decodeFile

KeyFinder::AudioData* LibAvDecoder::decodeFile(const QString& filePath, const int maxDuration){

  QMutexLocker codecMutexLocker(&codecMutex); // mutex the preparatory section of this method

  AVCodec *codec = NULL;
  AVFormatContext *fCtx = NULL;
  AVCodecContext *cCtx = NULL;
  AVDictionary* dict = NULL;

  // convert filepath
#ifdef Q_OS_WIN
  const wchar_t* filePathWc = reinterpret_cast<const wchar_t*>(filePath.constData());
  const char* filePathCh = utf16_to_utf8(filePathWc);
#else
  QByteArray encodedPath = QFile::encodeName(filePath);
  const char* filePathCh = encodedPath;
#endif

  // open file
  int openInputResult = avformat_open_input(&fCtx, filePathCh, NULL, NULL);
  if(openInputResult != 0){
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavCouldNotOpenFile(openInputResult).toLocal8Bit().constData());
  }

  if(avformat_find_stream_info(fCtx, NULL) < 0){
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavCouldNotFindStreamInformation().toLocal8Bit().constData());
  }
  int audioStream = -1;
  for(int i=0; i<(signed)fCtx->nb_streams; i++){
    if(fCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO){
      audioStream = i;
      break;
    }
  }
  if(audioStream == -1){
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavCouldNotFindAudioStream().toLocal8Bit().constData());
  }

  // Determine duration
  int durationSeconds = fCtx->duration / AV_TIME_BASE;
  int durationMinutes = durationSeconds / 60;
  // First condition is a hack for bizarre overestimation of some MP3s
  if(durationMinutes < 720 && durationSeconds > maxDuration * 60){
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->durationExceedsPreference(durationMinutes, durationSeconds % 60, maxDuration).toLocal8Bit().constData());
  }

  // Determine stream codec
  cCtx = fCtx->streams[audioStream]->codec;
  codec = avcodec_find_decoder(cCtx->codec_id);
  if(codec == NULL){
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavUnsupportedCodec().toLocal8Bit().constData());
  }

  // Open codec
  int codecOpenResult = avcodec_open2(cCtx, codec, &dict);
  if(codecOpenResult < 0){
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavCouldNotOpenCodec(codec->long_name, codecOpenResult).toLocal8Bit().constData());
  }

  ReSampleContext* rsCtx = av_audio_resample_init(
        cCtx->channels, cCtx->channels,
        cCtx->sample_rate, cCtx->sample_rate,
        AV_SAMPLE_FMT_S16, cCtx->sample_fmt,
        0, 0, 0, 0);
  if(rsCtx == NULL){
    avcodec_close(cCtx);
    av_close_input_file(fCtx);
    throw KeyFinder::Exception(GuiStrings::getInstance()->libavCouldNotCreateResampleContext().toLocal8Bit().constData());
  }

  qDebug("Decoding %s (%s, %d)", filePathCh, av_get_sample_fmt_name(cCtx->sample_fmt), cCtx->sample_rate);

  codecMutexLocker.unlock();

  // Prep buffer
  KeyFinder::AudioData *audio = new KeyFinder::AudioData();
  audio->setFrameRate(cCtx->sample_rate);
  audio->setChannels(cCtx->channels);
  // Decode stream
  AVPacket avpkt;
  int badPacketCount = 0;
  int badPacketThreshold = 100;
  while(true){
    av_init_packet(&avpkt);
    if(av_read_frame(fCtx, &avpkt) < 0)
      break;
    if(avpkt.stream_index == audioStream){
      try{
        int result = decodePacket(cCtx, rsCtx, &avpkt, audio);
        if(result != 0){
          if(badPacketCount < badPacketThreshold){
            badPacketCount++;
          }else{
            avcodec_close(cCtx);
            av_close_input_file(fCtx);
//.........这里部分代码省略.........

开发者ID:jlertle，项目名称:is_KeyFinder，代码行数:101，代码来源:decoderlibav.cpp

示例6: decodeFile

KeyFinder::AudioData* LibAvDecoder::decodeFile(const QString& filePath){

  QMutexLocker codecMutexLocker(&codecMutex); // mutex the preparatory section of this method

  AVCodec *codec = NULL;
  AVFormatContext *fCtx = NULL;
  AVCodecContext *cCtx = NULL;
  AVDictionary* dict = NULL;

  // convert filepath
#ifdef Q_OS_WIN
  const wchar_t* filePathWc = reinterpret_cast<const wchar_t*>(filePath.constData());
  const char* filePathCh = utf16_to_utf8(filePathWc);
#else
  QByteArray encodedPath = QFile::encodeName(filePath);
  const char* filePathCh = encodedPath;
#endif

  // open file
  int openInputResult = avformat_open_input(&fCtx, filePathCh, NULL, NULL);
  if(openInputResult != 0){
    std::ostringstream ss;
    ss << "Could not open audio file (" << openInputResult << ")";
    throw KeyFinder::Exception(ss.str());
  }

  if(avformat_find_stream_info(fCtx,NULL) < 0){
    throw KeyFinder::Exception("Could not find stream information");
  }
  int audioStream = -1;
  for(int i=0; i<(signed)fCtx->nb_streams; i++){
    if(fCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO){
      audioStream = i;
      break;
    }
  }
  if(audioStream == -1){
    throw KeyFinder::Exception("Could not find an audio stream");
  }

  // Determine stream codec
  cCtx = fCtx->streams[audioStream]->codec;
  codec = avcodec_find_decoder(cCtx->codec_id);
  if(codec == NULL){
    throw KeyFinder::Exception("Audio stream has unsupported codec");
  }

  // Open codec
  int codecOpenResult = avcodec_open2(cCtx, codec, &dict);
  if(codecOpenResult < 0){
    std::ostringstream ss;
    ss << "Could not open audio codec: " << codec->long_name << " (" << codecOpenResult << ")";
    throw KeyFinder::Exception(ss.str());
  }

  ReSampleContext* rsCtx = av_audio_resample_init(
        cCtx->channels, cCtx->channels,
        cCtx->sample_rate, cCtx->sample_rate,
        AV_SAMPLE_FMT_S16, cCtx->sample_fmt,
        0, 0, 0, 0);
  if(rsCtx == NULL){
    throw KeyFinder::Exception("Could not create ReSampleContext");
  }

  qDebug("Decoding %s (%s, %d)", filePathCh, av_get_sample_fmt_name(cCtx->sample_fmt), cCtx->sample_rate);

  codecMutexLocker.unlock();

  // Prep buffer
  KeyFinder::AudioData *audio = new KeyFinder::AudioData();
  audio->setFrameRate(cCtx->sample_rate);
  audio->setChannels(cCtx->channels);
  // Decode stream
  AVPacket avpkt;
  int badPacketCount = 0;
  while(true){
    av_init_packet(&avpkt);
    if(av_read_frame(fCtx, &avpkt) < 0)
      break;
    if(avpkt.stream_index == audioStream){
      try{
        int result = decodePacket(cCtx, rsCtx, &avpkt, audio);
        if(result != 0){
          if(badPacketCount < 100){
            badPacketCount++;
          }else{
            throw KeyFinder::Exception("100 bad packets");
          }
        }
      }catch(KeyFinder::Exception& e){
        throw e;
      }
    }
    av_free_packet(&avpkt);
  }

  codecMutexLocker.relock();
  audio_resample_close(rsCtx);
  int codecCloseResult = avcodec_close(cCtx);
  if(codecCloseResult < 0){
//.........这里部分代码省略.........

开发者ID:bkpsu，项目名称:is_KeyFinder，代码行数:101，代码来源:decoderlibav.cpp

示例7: while

TEST (AudioDataTest, SliceFromBack) {
  KeyFinder::AudioData a;
  a.setChannels(1);
  a.setFrameRate(1);

  KeyFinder::AudioData* b = NULL;
  KeyFinder::AudioData* nullPtr = NULL;

  ASSERT_THROW(b = a.sliceSamplesFromBack(1), KeyFinder::Exception);
  ASSERT_EQ(nullPtr, b);

  a.addToFrameCount(10);
  ASSERT_THROW(b = a.sliceSamplesFromBack(11), KeyFinder::Exception);
  ASSERT_EQ(nullPtr, b);

  a.resetIterators();
  float v = 0;
  while (a.writeIteratorWithinUpperBound()) {
    a.setSampleAtWriteIterator(v);
    a.advanceWriteIterator();
    v += 1.0;
  }

  ASSERT_NO_THROW(b = a.sliceSamplesFromBack(5));
  ASSERT_NE(nullPtr, b);
  ASSERT_EQ(5, a.getSampleCount());
  ASSERT_EQ(5, b->getSampleCount());
  ASSERT_FLOAT_EQ(5.0, b->getSample(0));
  ASSERT_FLOAT_EQ(9.0, b->getSample(4));
  delete b;
}

开发者ID:PimpinFou，项目名称:libKeyFinder，代码行数:31，代码来源:audiodatatest.cpp

注：本文中的keyfinder::AudioData类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。