WASAPI loopback

Windows
1

I added support for WASAPI loopback recording (https://learn.microsoft.com/en-us/windows/win32/coreaudio/loopback-recording.

To use it yourself, clone the direct2d branch of my JUCE fork: https://github.com/mattgonzalez/JUCE/tree/direct2d

If you’re using the AudioDeviceManager, set the output device to “<< none >>” and set the input to your desired output device:

image

Or do this:

        // Loopback only works in shared mode
        if (auto wasapiDeviceType = juce::AudioIODeviceType::createAudioIODeviceType_WASAPI(juce::WASAPIDeviceMode::shared))
        {
            wasapiDeviceType->scanForDevices();

            if (auto outputDeviceNames = wasapiDeviceType->getDeviceNames(false /* wantInputNames */); outputDeviceNames.size() > 0)
            {
                juce::String inputName = outputDeviceNames[0];
                std::unique_ptr<juce::AudioIODevice> device
                {
                    wasapiDeviceType->createDevice({}, inputName)
                };
                if (device)
                {
                    DBG("Opened " << device->getName() << " for WASAPI loopback recording");
                }
            }
        }

Enjoy-

Matt

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