C++ (Cpp) AudioBufferAddWithScale_NEON示例

示例#1

文件： AudioNodeEngine.cpp 项目： rnd-user/gecko-dev

void AudioBufferAddWithScale(const float* aInput,
                             float aScale,
                             float* aOutput,
                             uint32_t aSize)
{
#ifdef BUILD_ARM_NEON
  if (mozilla::supports_neon()) {
    AudioBufferAddWithScale_NEON(aInput, aScale, aOutput, aSize);
    return;
  }
#endif

#ifdef USE_SSE2
  if (mozilla::supports_sse2()) {
    AudioBufferAddWithScale_SSE(aInput, aScale, aOutput, aSize);
    return;
  }
#endif

  if (aScale == 1.0f) {
    for (uint32_t i = 0; i < aSize; ++i) {
      aOutput[i] += aInput[i];
    }
  } else {
    for (uint32_t i = 0; i < aSize; ++i) {
      aOutput[i] += aInput[i]*aScale;
    }
  }
}

示例#2

文件： AudioNodeEngine.cpp 项目： Wafflespeanut/gecko-dev

void AudioBufferAddWithScale(const float* aInput,
                             float aScale,
                             float* aOutput,
                             uint32_t aSize)
{
#ifdef BUILD_ARM_NEON
  if (mozilla::supports_neon()) {
    AudioBufferAddWithScale_NEON(aInput, aScale, aOutput, aSize);
    return;
  }
#endif

#ifdef USE_SSE2
  if (mozilla::supports_sse2()) {
    if (aScale == 1.0f) {
      while (aSize && (!IS_ALIGNED16(aInput) || !IS_ALIGNED16(aOutput))) {
        *aOutput += *aInput;
        ++aOutput;
        ++aInput;
        --aSize;
      }
    } else {
      while (aSize && (!IS_ALIGNED16(aInput) || !IS_ALIGNED16(aOutput))) {
        *aOutput += *aInput*aScale;
        ++aOutput;
        ++aInput;
        --aSize;
      }
    }

    // we need to round aSize down to the nearest multiple of 16
    uint32_t alignedSize = aSize & ~0x0F;
    if (alignedSize > 0) {
      AudioBufferAddWithScale_SSE(aInput, aScale, aOutput, alignedSize);

      // adjust parameters for use with scalar operations below
      aInput += alignedSize;
      aOutput += alignedSize;
      aSize -= alignedSize;
    }
  }
#endif

  if (aScale == 1.0f) {
    for (uint32_t i = 0; i < aSize; ++i) {
      aOutput[i] += aInput[i];
    }
  } else {
    for (uint32_t i = 0; i < aSize; ++i) {
      aOutput[i] += aInput[i]*aScale;
    }
  }
}