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AudioDeviceService.cpp
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AudioDeviceService.cpp
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#include "common.h"
#include "Mmdeviceapi.h"
#include "AudioDeviceService.h"
#include "Functiondiscoverykeys_devpkey.h"
#include "PolicyConfig.h"
#include "Propidl.h"
#include "Endpointvolume.h"
using namespace std;
using namespace std::tr1;
using namespace EarTrumpet::Interop;
AudioDeviceService* AudioDeviceService::__instance = nullptr;
void AudioDeviceService::CleanUpAudioDevices()
{
for (auto device = _devices.begin(); device != _devices.end(); device++)
{
CoTaskMemFree(device->Id);
CoTaskMemFree(device->DisplayName);
}
_devices.clear();
}
HRESULT AudioDeviceService::RefreshAudioDevices()
{
CleanUpAudioDevices();
CComPtr<IMMDeviceEnumerator> deviceEnumerator;
FAST_FAIL(CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_INPROC, IID_PPV_ARGS(&deviceEnumerator)));
CComPtr<IMMDeviceCollection> deviceCollection;
FAST_FAIL(deviceEnumerator->EnumAudioEndpoints(EDataFlow::eRender, ERole::eMultimedia, &deviceCollection));
CComPtr<IMMDevice> defaultDevice;
FAST_FAIL(deviceEnumerator->GetDefaultAudioEndpoint(EDataFlow::eRender, ERole::eMultimedia, &defaultDevice));
CComHeapPtr<wchar_t> defaultDeviceId;
FAST_FAIL(defaultDevice->GetId(&defaultDeviceId));
UINT numDevices;
FAST_FAIL(deviceCollection->GetCount(&numDevices));
for (UINT i = 0; i < numDevices; i++)
{
CComPtr<IMMDevice> device;
if (FAILED(deviceCollection->Item(i, &device)))
{
continue;
}
CComHeapPtr<wchar_t> deviceId;
FAST_FAIL(device->GetId(&deviceId));
CComPtr<IPropertyStore> propertyStore;
FAST_FAIL(device->OpenPropertyStore(STGM_READ, &propertyStore));
PROPVARIANT friendlyName;
PropVariantInit(&friendlyName);
FAST_FAIL(propertyStore->GetValue(PKEY_Device_FriendlyName, &friendlyName));
CComPtr<IAudioEndpointVolume> audioEndpointVol;
FAST_FAIL(device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC, nullptr, reinterpret_cast<void**>(&audioEndpointVol)));
BOOL isMuted;
FAST_FAIL(audioEndpointVol->GetMute(&isMuted));
EarTrumpetAudioDevice audioDevice = {};
FAST_FAIL(SHStrDup(friendlyName.pwszVal, &audioDevice.DisplayName));
FAST_FAIL(SHStrDup(deviceId, &audioDevice.Id));
audioDevice.IsDefault = (wcscmp(defaultDeviceId, deviceId) == 0);
audioDevice.IsMuted = !!isMuted;
_devices.push_back(audioDevice);
PropVariantClear(&friendlyName);
}
return S_OK;
}
HRESULT AudioDeviceService::SetDefaultAudioDevice(LPWSTR deviceId)
{
CComPtr<IPolicyConfig> policyConfig;
FAST_FAIL(CoCreateInstance(__uuidof(CPolicyConfigClient), nullptr, CLSCTX_INPROC, IID_PPV_ARGS(&policyConfig)));
return policyConfig->SetDefaultEndpoint(deviceId, ERole::eMultimedia);
}
HRESULT AudioDeviceService::GetDeviceByDeviceId(PWSTR deviceId, IMMDevice** device)
{
CComPtr<IMMDeviceEnumerator> deviceEnumerator;
FAST_FAIL(CoCreateInstance(__uuidof(MMDeviceEnumerator), nullptr, CLSCTX_INPROC, IID_PPV_ARGS(&deviceEnumerator)));
return deviceEnumerator->GetDevice(deviceId, device);
}
HRESULT AudioDeviceService::GetAudioDeviceVolume(LPWSTR deviceId, float* volume)
{
CComPtr<IMMDevice> device;
FAST_FAIL(this->GetDeviceByDeviceId(deviceId, &device));
CComPtr<IAudioEndpointVolume> audioEndpointVol;
FAST_FAIL(device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC, nullptr, reinterpret_cast<void**>(&audioEndpointVol)));
return audioEndpointVol->GetMasterVolumeLevelScalar(volume);
}
HRESULT AudioDeviceService::SetAudioDeviceVolume(LPWSTR deviceId, float volume)
{
CComPtr<IMMDevice> device;
FAST_FAIL(this->GetDeviceByDeviceId(deviceId, &device));
CComPtr<IAudioEndpointVolume> audioEndpointVol;
FAST_FAIL(device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC, nullptr, reinterpret_cast<void**>(&audioEndpointVol)));
return audioEndpointVol->SetMasterVolumeLevelScalar(volume, nullptr);
}
HRESULT AudioDeviceService::GetAudioDevices(void** audioDevices)
{
if (_devices.size() == 0)
{
return HRESULT_FROM_WIN32(ERROR_NO_MORE_ITEMS);
}
*audioDevices = &_devices[0];
return S_OK;
}
HRESULT AudioDeviceService::SetMuteBoolForDevice(LPWSTR deviceId, BOOL value)
{
CComPtr<IMMDevice> device;
FAST_FAIL(this->GetDeviceByDeviceId(deviceId, &device));
CComPtr<IAudioEndpointVolume> audioEndpointVol;
FAST_FAIL(device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_INPROC, nullptr, reinterpret_cast<void**>(&audioEndpointVol)));
return audioEndpointVol->SetMute(value, nullptr);
}
HRESULT AudioDeviceService::MuteAudioDevice(LPWSTR deviceId)
{
return SetMuteBoolForDevice(deviceId, TRUE);
}
HRESULT AudioDeviceService::UnmuteAudioDevice(LPWSTR deviceId)
{
return SetMuteBoolForDevice(deviceId, FALSE);
}
int AudioDeviceService::GetAudioDeviceCount()
{
return _devices.size();
}