Adventures into the cursed land of c++ #NaN.

xinput_audio.cpp

#include <iostream>
#include <Windows.h>
#include <Xinput.h>

#pragma comment (lib, "xinput.lib")

int main()
{
    std::cout << "Hello World!\n";

    DWORD id = 0;
    XINPUT_STATE state;
  
    // First, a little sanity check: Gotta make sure we can see the controller
    if (XInputGetState(id, &state) != ERROR_SUCCESS)
    {
        printf("Controller %d doesn't exist\n", id);
        return 1;
    }

    // Now I just want to play around with the audio functionality. This is the only
    // example available that hasn't been plastered with deprecation warnings.
    // https://docs.microsoft.com/en-us/windows/win32/xinput/getting-started-with-xinput#getting-audio-device-identifiers
    WCHAR renderId[256] = { 0 };
    WCHAR captureId[256] = { 0 };
    UINT rcount = 256;
    UINT ccount = 256;

    // Annoyingly, it doesn't seem like anything is ending up in those buffers, so
    // let's check out the return value.
    DWORD result = XInputGetAudioDeviceIds(id, renderId, &rcount, captureId, &ccount);
    printf("%d", result); // => 1167 (ERROR_DEVICE_NOT_CONNECTED)
    // - https://docs.microsoft.com/en-us/windows/win32/api/xinput/nf-xinput-xinputgetaudiodeviceids#return-value
    // So if the documentation is to be trusted, this explicitly means the controller isn't
    // physically connected. After we *just* polled it. Right.
}