clipsourcetest.cxx

inline void test_clipsource()
{
    juce::AudioFormatManager mana;
    mana.registerBasicFormats();
    auto reader =
        mana.createReaderFor(juce::File(R"(C:\MusicAudio\sourcesamples\ukulele\uku01.wav)"));
    double outsr = 96000.0;
    auto readersrc = std::make_unique<juce::AudioFormatReaderSource>(reader, true);
    auto src = std::make_unique<ClipAudioSourceModel>(std::move(readersrc), juce::String("foo"),
                                                      0.0, 0.0, 1.0, mana);
    juce::WavAudioFormat wavf;
    juce::File outputfile{R"(C:\MusicAudio\sourcesamples\ukulele\tstest.wav)"};
    if (outputfile.existsAsFile())
        outputfile.deleteFile();
    auto ostream = outputfile.createOutputStream();
    auto writer = wavf.createWriterFor(ostream.release(), outsr, reader->numChannels, 32, {}, 0);
    int bufsize = 256;
    juce::AudioBuffer<float> procBuf{(int)reader->numChannels, bufsize};
    procBuf.clear();
    int outlen = reader->lengthInSamples / reader->sampleRate * outsr;
    int counter = 0;
    src->prepareToPlay(bufsize, outsr);
    src->setStretchRatio(0.5);
    while (counter < outlen)
    {
        juce::AudioSourceChannelInfo info;
        info.buffer = &procBuf;
        info.startSample = 0;
        info.numSamples = bufsize;
        src->getNextAudioBlock(info);
        writer->writeFromAudioSampleBuffer(procBuf, 0, bufsize);
        counter += bufsize;
    }
    delete writer;
}