C++ Float32Array::Length方法代码示例

本文整理汇总了C++中Float32Array::Length方法的典型用法代码示例。如果您正苦于以下问题：C++ Float32Array::Length方法的具体用法？C++ Float32Array::Length怎么用？C++ Float32Array::Length使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Float32Array的用法示例。

在下文中一共展示了Float32Array::Length方法的8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: PodMove

void
AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
                           uint32_t aChannelNumber, uint32_t aStartInChannel,
                           ErrorResult& aRv)
{
  aSource.ComputeLengthAndData();

  uint32_t length = aSource.Length();
  CheckedInt<uint32_t> end = aStartInChannel;
  end += length;
  if (aChannelNumber >= NumberOfChannels() ||
      !end.isValid() || end.value() > mLength) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  if (!mSharedChannels && JS_GetTypedArrayLength(mJSChannels[aChannelNumber]) != mLength) {
    // The array was probably neutered
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  if (!RestoreJSChannelData(aJSContext)) {
    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
    return;
  }

  PodMove(JS_GetFloat32ArrayData(mJSChannels[aChannelNumber]) + aStartInChannel,
          aSource.Data(), length);
}

开发者ID:afabbro，项目名称:gecko-dev，代码行数:30，代码来源:AudioBuffer.cpp

示例2: PeriodicWave

already_AddRefed<PeriodicWave>
AudioContext::CreatePeriodicWave(const Float32Array& aRealData,
                                 const Float32Array& aImagData,
                                 ErrorResult& aRv)
{
  if (aRealData.Length() != aImagData.Length() ||
      aRealData.Length() == 0 ||
      aRealData.Length() > 4096) {
    aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
    return nullptr;
  }

  nsRefPtr<PeriodicWave> periodicWave =
    new PeriodicWave(this, aRealData.Data(), aRealData.Length(),
                     aImagData.Data(), aImagData.Length());
  return periodicWave.forget();
}

开发者ID:Nebelhom，项目名称:mozilla-central，代码行数:17，代码来源:AudioContext.cpp

示例3: DOMMatrix

already_AddRefed<DOMMatrix>
DOMMatrix::Constructor(const GlobalObject& aGlobal, const Float32Array& aArray32, ErrorResult& aRv)
{
  RefPtr<DOMMatrix> obj = new DOMMatrix(aGlobal.GetAsSupports());
  aArray32.ComputeLengthAndData();
  SetDataInMatrix(obj, aArray32.Data(), aArray32.Length(), aRv);

  return obj.forget();
}

开发者ID:GuanWen-Chen，项目名称:gecko-b2g，代码行数:9，代码来源:DOMMatrix.cpp

示例4:

void
AnalyserNode::GetFloatTimeDomainData(const Float32Array& aArray)
{
  float* buffer = aArray.Data();
  uint32_t length = std::min(aArray.Length(), mBuffer.Length());

  for (uint32_t i = 0; i < length; ++i) {
    buffer[i] = mBuffer[(i + mWriteIndex) % mBuffer.Length()];;
  }
}

开发者ID:JuannyWang，项目名称:gecko-dev，代码行数:10，代码来源:AnalyserNode.cpp

示例5: frequencies

void
BiquadFilterNode::GetFrequencyResponse(const Float32Array& aFrequencyHz,
                                       const Float32Array& aMagResponse,
                                       const Float32Array& aPhaseResponse)
{
  aFrequencyHz.ComputeLengthAndData();
  aMagResponse.ComputeLengthAndData();
  aPhaseResponse.ComputeLengthAndData();

  uint32_t length = std::min(std::min(aFrequencyHz.Length(), aMagResponse.Length()),
                             aPhaseResponse.Length());
  if (!length) {
    return;
  }

  nsAutoArrayPtr<float> frequencies(new float[length]);
  float* frequencyHz = aFrequencyHz.Data();
  const double nyquist = Context()->SampleRate() * 0.5;

  // Normalize the frequencies
  for (uint32_t i = 0; i < length; ++i) {
    if (frequencyHz[i] >= 0 && frequencyHz[i] <= nyquist) {
        frequencies[i] = static_cast<float>(frequencyHz[i] / nyquist);
    } else {
        frequencies[i] = std::numeric_limits<float>::quiet_NaN();
    }
  }

  const double currentTime = Context()->CurrentTime();

  double freq = mFrequency->GetValueAtTime(currentTime);
  double q = mQ->GetValueAtTime(currentTime);
  double gain = mGain->GetValueAtTime(currentTime);
  double detune = mDetune->GetValueAtTime(currentTime);

  WebCore::Biquad biquad;
  SetParamsOnBiquad(biquad, Context()->SampleRate(), mType, freq, q, gain, detune);
  biquad.getFrequencyResponse(int(length), frequencies, aMagResponse.Data(), aPhaseResponse.Data());
}

开发者ID:Manishearth，项目名称:gecko-dev，代码行数:39，代码来源:BiquadFilterNode.cpp

示例6: PeriodicWave

already_AddRefed<PeriodicWave>
AudioContext::CreatePeriodicWave(const Float32Array& aRealData,
                                 const Float32Array& aImagData,
                                 const PeriodicWaveConstraints& aConstraints,
                                 ErrorResult& aRv)
{
  aRealData.ComputeLengthAndData();
  aImagData.ComputeLengthAndData();

  if (aRealData.Length() != aImagData.Length() ||
      aRealData.Length() == 0) {
    aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
    return nullptr;
  }

  RefPtr<PeriodicWave> periodicWave =
    new PeriodicWave(this, aRealData.Data(), aImagData.Data(),
                     aImagData.Length(), aConstraints.mDisableNormalization,
                     aRv);
  if (aRv.Failed()) {
    return nullptr;
  }
  return periodicWave.forget();
}

开发者ID:subsevenx2001，项目名称:gecko-dev，代码行数:24，代码来源:AudioContext.cpp

示例7: Length

void
AudioBuffer::CopyFromChannel(const Float32Array& aDestination, uint32_t aChannelNumber,
                             uint32_t aStartInChannel, ErrorResult& aRv)
{
  aDestination.ComputeLengthAndData();

  uint32_t length = aDestination.Length();
  CheckedInt<uint32_t> end = aStartInChannel;
  end += length;
  if (aChannelNumber >= NumberOfChannels() ||
      !end.isValid() || end.value() > Length()) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  JS::AutoCheckCannotGC nogc;
  JSObject* channelArray = mJSChannels[aChannelNumber];
  if (channelArray) {
    if (JS_GetTypedArrayLength(channelArray) != Length()) {
      // The array's buffer was detached.
      aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
      return;
    }

    bool isShared = false;
    const float* sourceData =
      JS_GetFloat32ArrayData(channelArray, &isShared, nogc);
    // The sourceData arrays should all have originated in
    // RestoreJSChannelData, where they are created unshared.
    MOZ_ASSERT(!isShared);
    PodMove(aDestination.Data(), sourceData + aStartInChannel, length);
    return;
  }

  if (!mSharedChannels.IsNull()) {
    CopyChannelDataToFloat(mSharedChannels, aChannelNumber, aStartInChannel,
                           aDestination.Data(), length);
    return;
  }

  PodZero(aDestination.Data(), length);
}

开发者ID:luke-chang，项目名称:gecko-1，代码行数:42，代码来源:AudioBuffer.cpp

示例8: PodMove

void
AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
                           uint32_t aChannelNumber, uint32_t aStartInChannel,
                           ErrorResult& aRv)
{
  aSource.ComputeLengthAndData();

  uint32_t length = aSource.Length();
  CheckedInt<uint32_t> end = aStartInChannel;
  end += length;
  if (aChannelNumber >= NumberOfChannels() ||
      !end.isValid() || end.value() > mLength) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  if (!RestoreJSChannelData(aJSContext)) {
    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
    return;
  }

  JS::AutoCheckCannotGC nogc;
  JSObject* channelArray = mJSChannels[aChannelNumber];
  if (JS_GetTypedArrayLength(channelArray) != mLength) {
    // The array's buffer was detached.
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  bool isShared = false;
  float* channelData = JS_GetFloat32ArrayData(channelArray, &isShared, nogc);
  // The channelData arrays should all have originated in
  // RestoreJSChannelData, where they are created unshared.
  MOZ_ASSERT(!isShared);
  PodMove(channelData + aStartInChannel, aSource.Data(), length);
}

开发者ID:MekliCZ，项目名称:positron，代码行数:36，代码来源:AudioBuffer.cpp

注：本文中的Float32Array::Length方法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。