com-policy-config

COM definitions for the undocumented IPolicyConfig interface. This interface can be used to change to the default audio device on windows.

This is a manual port of PolicyConfig.h.

More additional resources:

Link 1

Link 2

Important: It is possible I made a mistake during the port or messed up some type. Take everything with a grain of salt.

Example

```rust use windows::core::{PCWSTR, Result}; use windows::Win32::Devices::FunctionDiscovery::PKEYDeviceFriendlyName; use windows::Win32::Media::Audio::{DEVICESTATEACTIVE, eConsole, eRender, IMMDeviceEnumerator, MMDeviceEnumerator}; use windows::Win32::System::Com::{CLSCTXALL, CoCreateInstance, COINITMULTITHREADED, CoInitializeEx, CoUninitialize, STGMREAD}; use compolicy_config::{IPolicyConfig, PolicyConfigClient};

fn main() -> Result<()>{

unsafe {
    CoInitializeEx(None, COINIT_MULTITHREADED)?;

    let enumerator: IMMDeviceEnumerator = CoCreateInstance(&MMDeviceEnumerator, None, CLSCTX_ALL)?;

    println!("All Devices:");
    let device_collection = enumerator.EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE)?;
    for i in 0..device_collection.GetCount()? {
        let device = device_collection.Item(i)?;
        let property_store = device.OpenPropertyStore(STGM_READ)?;
        let name = property_store.GetValue(&PKEY_Device_FriendlyName)?;
        println!("  {}", name.Anonymous.Anonymous.Anonymous.pwszVal.display());
    }

    let selected_device = device_collection.Item(0)?;
    let property_store = selected_device.OpenPropertyStore(STGM_READ)?;
    let name = property_store.GetValue(&PKEY_Device_FriendlyName)?;
    println!("Selected Device: {}", name.Anonymous.Anonymous.Anonymous.pwszVal.display());

    let device_id = PCWSTR(selected_device.GetId()?.0);
    let policy_config: IPolicyConfig = CoCreateInstance(&PolicyConfigClient, None, CLSCTX_ALL)?;
    policy_config.SetDefaultEndpoint(&device_id, eConsole)?;

    CoUninitialize();
}

Ok(())

} ```

License

MIT License