JUCEでWavファイルを書き出す

juce_exportWav.cpp

void MainContentComponent::exportWav(AudioSampleBuffer &bufferToWrite, String fileName)
{
    const double sampleRate = deviceManager.getCurrentAudioDevice()->getCurrentSampleRate();//現在のサンプルレートを取得
    const int numChannel = bufferToWrite.getNumChannels();
    const int bitDepth = 32;//32bitFloat
    File file(File::getSpecialLocation(File::SpecialLocationType::userDesktopDirectory).getChildFile(fileName));
    file.deleteFile();
    ScopedPointer<FileOutputStream>  fos(file.createOutputStream());
    WavAudioFormat wavFormat;
    ScopedPointer<AudioFormatWriter> writer(wavFormat.createWriterFor(fos, sampleRate, numChannel, bitDepth, StringPairArray(), 0));
    fos.release();
    writer->writeFromAudioSampleBuffer(bufferToWrite, 0, bufferToWrite.getNumSamples());
}