Windows下获取扬声器的一些信息

Windows下获取扬声器的一些信息

一、获取扬声器是否为静音和音量  #include "audio_utils.h" #include #include #include #include #include #include #include #include #include #include #include // 获取默认设备的音量 float GetDefaultAudioDeviceVolume() { CoInitializeEx(NULL, COINIT_MULTITHREADED); // 创建com对象，创建IMMDeviceEnumerator对象 Microsoft::WRL::ComPtr enumerator = nullptr; Microsoft::WRL::ComPtr device = nullptr; Microsoft::WRL::ComPtr endpoint_volume = nullptr; std::shared_ptr raii_ptr(nullptr, [&](void*) { endpoint_volume = nullptr; device = nullptr; enumerator = nullptr; CoUninitialize(); }); HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)enumerator.GetAddressOf()); if (hr != S_OK) { std::cout << "CoCreateInstance error" << std::endl; return -1; } // 获取指定EDataFlow和ERole方向上的设备 // eRender：渲染设备的数据流方向，扬声器，对应eCapture：麦克风 // eConsole：游戏，系统通知声音和命令 hr = enumerator->GetDefaultAudioEndpoint(eRender, eConsole, device.GetAddressOf()); if (hr != S_OK) { std::cout << "GetDefaultAudioEndpoint error" << std::endl; return -1; } // 创建IAudioEndpointVolume对象 hr = device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (void**)endpoint_volume.GetAddressOf()); if (hr != S_OK) { std::cout << "Activate error" << std::endl; return -1; } float volume_sacle; endpoint_volume->GetMasterVolumeLevelScalar(&volume_sacle); return volume_sacle; } // 设置默认设备的音量 void SetDefaultAudioDeviceVolume(float volume) { CoInitializeEx(NULL, COINIT_MULTITHREADED); Microsoft::WRL::ComPtr enumerator = nullptr; Microsoft::WRL::ComPtr device = nullptr; Microsoft::WRL::ComPtr endpoint_volume = nullptr; std::shared_ptr raii_ptr(nullptr, [&](void*) { endpoint_volume = nullptr; device = nullptr; enumerator = nullptr; CoUninitialize(); }); HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)enumerator.GetAddressOf()); if (hr != S_OK) { std::cout << "CoCreateInstance error" << std::endl; return; } hr = enumerator->GetDefaultAudioEndpoint(eRender, eConsole, device.GetAddressOf()); if (hr != S_OK) { std::cout << "GetDefaultAudioEndpoint error" << std::endl; return; } hr = device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (void**)endpoint_volume.GetAddressOf()); if (hr != S_OK) { std::cout << "Activate error" << std::endl; return; } endpoint_volume->SetMasterVolumeLevelScalar(volume, nullptr); } // 默认设备是不是静音 bool IsDefaultAudioDeviceMuted() { CoInitializeEx(NULL, COINIT_MULTITHREADED); Microsoft::WRL::ComPtr enumerator = nullptr; Microsoft::WRL::ComPtr device = nullptr; Microsoft::WRL::ComPtr endpoint_volume = nullptr; std::shared_ptr raii_ptr(nullptr, [&](void*) { endpoint_volume = nullptr; device = nullptr; enumerator = nullptr; CoUninitialize(); }); HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)enumerator.GetAddressOf()); if (hr != S_OK) { std::cout << "CoCreateInstance error" << std::endl; return false; } hr = enumerator->GetDefaultAudioEndpoint(eRender, eConsole, device.GetAddressOf()); if (hr != S_OK) { std::cout << "GetDefaultAudioEndpoint error" << std::endl; return false; } hr = device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (void**)endpoint_volume.GetAddressOf()); if (hr != S_OK) { std::cout << "Activate error" << std::endl; return false; } BOOL mute = false; endpoint_volume->GetMute(&mute); return mute; } // 设置默认设备是否为静音 void SetDefaultAudioDeviceMuted(bool mute) { BOOL bmute = mute; CoInitializeEx(NULL, COINIT_MULTITHREADED); Microsoft::WRL::ComPtr enumerator = nullptr; Microsoft::WRL::ComPtr device = nullptr; Microsoft::WRL::ComPtr endpoint_volume = nullptr; std::shared_ptr raii_ptr(nullptr, [&](void*) { endpoint_volume = nullptr; device = nullptr; enumerator = nullptr; CoUninitialize(); }); HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)enumerator.GetAddressOf()); if (hr != S_OK) { std::cout << "CoCreateInstance error" << std::endl; return; } hr = enumerator->GetDefaultAudioEndpoint(eRender, eConsole, device.GetAddressOf()); if (hr != S_OK) { std::cout << "GetDefaultAudioEndpoint error" << std::endl; return; } hr = device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC_SERVER, NULL, (void**)endpoint_volume.GetAddressOf()); if (hr != S_OK) { std::cout << "Activate error" << std::endl; return; } endpoint_volume->SetMute(bmute, nullptr); } 二、获取扬声器的名字和id void RequireAudioInfo() { Microsoft::WRL::ComPtr device_enumerator = nullptr; Microsoft::WRL::ComPtr device = nullptr; Microsoft::WRL::ComPtr collection = nullptr; LPWSTR current_device_id = NULL; HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); std::shared_ptr raii_ptr(nullptr, [&](void*) { collection = nullptr; device = nullptr; device_enumerator = nullptr; CoUninitialize(); }); hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)device_enumerator.GetAddressOf()); hr = device_enumerator->GetDefaultAudioEndpoint(eRender, eConsole, device.GetAddressOf()); hr = device_enumerator->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, collection.GetAddressOf()); UINT count; hr = collection->GetCount(&count); device->GetId(¤t_device_id); std::wcout << "current_device_id:" << current_device_id << std::endl; CoTaskMemFree(current_device_id); // 打印音频设备个数 std::cout << "count:" << count << std::endl; for (int i = 0; i < count; ++i) { IMMDevice* pEndpointDevice = NULL; IDeviceTopology* deviceTopology = NULL; IConnector* connector = NULL; LPWSTR device_name = NULL; LPWSTR device_id = NULL; hr = collection->Item(i, &pEndpointDevice); hr = pEndpointDevice->Activate(__uuidof(IDeviceTopology), CLSCTX_INPROC_SERVER, NULL, (LPVOID*)&deviceTopology); hr = deviceTopology->GetConnector(0, &connector); hr = connector->GetConnectorIdConnectedTo(&device_name); std::wcout << "device name:" << device_name << std::endl; hr = pEndpointDevice->GetId(&device_id); std::wcout << "device id:" << device_id << std::endl; CoTaskMemFree(device_name); CoTaskMemFree(device_id); } }

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