c++ - 如何使用 Juce 加载脉冲响应的音频文件

Question

我目前正在为大学创建一个卷积混响插件，我已经下载了一个已经制作好的卷积器库以供在插件中使用。我有一些生成脉冲响应的代码，但是我不太确定如何将实际的音频文件加载到进程中。

这是卷积器类:

class FFTConvolver
{  
public:
  FFTConvolver();  
  virtual ~FFTConvolver();

  /**
  * @brief Initializes the convolver
  * @param blockSize Block size internally used by the convolver (partition size)
  * @param ir The impulse response
  * @param irLen Length of the impulse response
  * @return true: Success - false: Failed
  */
  bool init(size_t blockSize, const Sample* ir, size_t irLen);

  /**
  * @brief Convolves the the given input samples and immediately outputs the result
  * @param input The input samples
  * @param output The convolution result
  * @param len Number of input/output samples
  */
  void process(const Sample* input, Sample* output, size_t len);

  /**
  * @brief Resets the convolver and discards the set impulse response
  */
  void reset();

private:
  size_t _blockSize;
  size_t _segSize;
  size_t _segCount;
  size_t _fftComplexSize;
  std::vector<SplitComplex*> _segments;
  std::vector<SplitComplex*> _segmentsIR;
  SampleBuffer _fftBuffer;
  audiofft::AudioFFT _fft;
  SplitComplex _preMultiplied;
  SplitComplex _conv;
  SampleBuffer _overlap;
  size_t _current;
  SampleBuffer _inputBuffer;
  size_t _inputBufferFill;

  // Prevent uncontrolled usage
  FFTConvolver(const FFTConvolver&);
  FFTConvolver& operator=(const FFTConvolver&);
};

这是我用来实现脉冲响应的代码(但不是音频文件):

//convolver
    ir.ensureStorageAllocated (512);
    zeromem (ir.getRawDataPointer(), 512 * sizeof(float));
    ir.set (0, 1.0f);


    for (int i = 0; i < 10; ++i)
    {
        ir.set (Random::getSystemRandom().nextInt (512),
                Random::getSystemRandom().nextFloat() * 2.f - 1.f);
    }

    convolver.init (128, ir.getRawDataPointer(), 512);

并且在进程 block 中...

convolver.process (inputData, channelData, buffer.getNumSamples());

谁能告诉我如何使用脉冲响应的实际音频文件？

Answer 1

JUCE 可以在这里帮助您，文档中最相关的部分似乎是:

• AudioFormatReader
• AudioFormat::createReaderFor