2,783 questions
If you're talking about this : https://i.ibb.co/mvrpKCQ/Deactivate-Device.jpg
It is done with IPolicyConfig.SetEndpointVisibility
How to programmatically disable a playback in the sound control panel?
Victor Chen
106
Reputation points
The original requirement was to switch the communication device in Skype for Business, but since there is no such api (please tell me if there is any way to do this), so I gave up. Then I found that by disable/enable the device, Skype for Business seems to be able to detect this action and prompt the user to switch the communication device.
I know to use devcon.exe in the WDK to disable/enable a device, but when the device is playing sound, disabling the device will be prompted to reboot the system, so this method does not work.
So is there any way to help me do this?
Windows development | Windows API - Win32
Accepted answer
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Castorix31 90,681 Reputation points2020-09-23T13:48:05.51+00:00 -
Victor Chen 106 Reputation points
2020-09-24T02:28:24.097+00:00 Yes, that's it! You helped me a lot and saved me at least 2 weeks! Thank you so much!
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xiaoguo 0 Reputation points2024-05-14T08:41:58.2666667+00:00 Can you provide a demo or a link to use IPolicyConfig.SetEndpointVisibility? Bro
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Castorix31 90,681 Reputation points
2024-05-15T05:01:47.4466667+00:00 Can you provide a demo or a link to use IPolicyConfig.SetEndpointVisibility?
Similar code as in this test for example :
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xiaoguo 0 Reputation points
2024-05-16T07:09:34.13+00:00 #include <Windows.h>
#include <mmdeviceapi.h>
#include <iostream>
#include "PolicyConfig.h"
#include "ScopeGuard.h"
#include "BasicMacro.h"
HRESULT DisableAudioOutputDevice(const std::wstring& devID)
{
if (devID.empty()) { return S_FALSE; } HRESULT hr = ::CoInitializeEx(nullptr, COINIT_MULTITHREADED); if (FAILED(hr)) { return hr; } IPolicyConfigVista* policyConfig = nullptr; SCOPE_EXIT { SAFE_RELEASE(policyConfig); ::CoUninitialize(); }; hr = CoCreateInstance(__uuidof(CPolicyConfigVistaClient), NULL, CLSCTX_ALL, __uuidof(IPolicyConfigVista), (LPVOID*)&policyConfig); if (FAILED(hr)) { return hr; } ERole reserved = eMultimedia; if (policyConfig != nullptr) { hr = policyConfig->SetEndpointVisibility(devID.c_str(), reserved); if (FAILED(hr)) { return hr; } } return hr;}
bool GetDefaultAudioDeviceID(std::wstring& outDeviceId) {
HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); if (FAILED(hr)) { std::wcerr << L"Failed to initialize COM library" << std::endl; return false; } IMMDeviceEnumerator* pEnumerator = NULL; hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (LPVOID*)&pEnumerator); if (FAILED(hr)) { std::wcerr << L"Failed to create device enumerator" << std::endl; CoUninitialize(); return false; } IMMDevice* pDevice = NULL; hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice); if (FAILED(hr)) { std::wcerr << L"Failed to get default audio endpoint" << std::endl; pEnumerator->Release(); CoUninitialize(); return false; } LPWSTR deviceId; hr = pDevice->GetId(&deviceId); if (FAILED(hr)) { std::wcerr << L"Failed to get device ID" << std::endl; pDevice->Release(); pEnumerator->Release(); CoUninitialize(); return false; } outDeviceId.assign(deviceId); CoTaskMemFree(deviceId); pDevice->Release(); pEnumerator->Release(); CoUninitialize(); return true;}
int main() {
std::wstring deviceId; if (GetDefaultAudioDeviceID(deviceId)) { HRESULT hr = DisableAudioOutputDevice(deviceId.c_str()); if (SUCCEEDED(hr)) { std::wcout << L"Successfully disabled the audio device." << std::endl; } else { std::wcout << L"Failed to disable the audio device." << std::endl; } } else { std::wcerr << L"Failed to get the default audio device ID." << std::endl; return -1; } std::wcout << "Device ID: " << deviceId << std::endl; return 0;}
The above is my demo, when running“hr = policyConfig->SetEndpointVisibility(devID.c_str(), reserved);”，The hr return value of hr is 0x000000032: The request is not supported。What's the reason for this? It's so strange.
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Castorix31 90,681 Reputation points
2024-05-17T10:35:06.3166667+00:00 I just did a quick test by disabling my main render device on Windows 10 22H2 :
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xiaoguo 0 Reputation points
2024-05-14T08:44:24.4233333+00:00 Can you provide a demo or a link to use IPolicyConfig.SetEndpointVisibility ? Bro