com-policy-config

对未记录的IPolicyConfig接口的COM定义。此接口可用于更改Windows上的默认音频设备。

这是PolicyConfig.h的手动移植。

更多资源

链接1

链接2

重要：在移植过程中可能出错或混淆了一些类型。对一切持保留态度。

示例

use windows::core::{PCWSTR, Result};
use windows::Win32::Devices::FunctionDiscovery::PKEY_Device_FriendlyName;
use windows::Win32::Media::Audio::{DEVICE_STATE_ACTIVE, eConsole, eRender, IMMDeviceEnumerator, MMDeviceEnumerator};
use windows::Win32::System::Com::{CLSCTX_ALL, CoCreateInstance, COINIT_MULTITHREADED, CoInitializeEx, CoUninitialize, STGM_READ};
use com_policy_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(())
}

许可

MIT许可