diff options
Diffstat (limited to 'src/VBox/Devices/Audio/DrvHostAudioDSoundMMNotifClient.cpp')
| -rw-r--r-- | src/VBox/Devices/Audio/DrvHostAudioDSoundMMNotifClient.cpp | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/VBox/Devices/Audio/DrvHostAudioDSoundMMNotifClient.cpp b/src/VBox/Devices/Audio/DrvHostAudioDSoundMMNotifClient.cpp new file mode 100644 index 00000000..71d438b5 --- /dev/null +++ b/src/VBox/Devices/Audio/DrvHostAudioDSoundMMNotifClient.cpp @@ -0,0 +1,237 @@ +/* $Id: DrvHostAudioDSoundMMNotifClient.cpp $ */ +/** @file + * Host audio driver - DSound - Implementation of the IMMNotificationClient interface to detect audio endpoint changes. + */ + +/* + * Copyright (C) 2017-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + +#include "DrvHostAudioDSoundMMNotifClient.h" + +#include <iprt/win/windows.h> +#include <mmdeviceapi.h> +#include <iprt/win/endpointvolume.h> +#include <iprt/errcore.h> + +#ifdef LOG_GROUP /** @todo r=bird: wtf? Put it before all other includes like you're supposed to. */ +# undef LOG_GROUP +#endif +#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO +#include <VBox/log.h> + + +DrvHostAudioDSoundMMNotifClient::DrvHostAudioDSoundMMNotifClient(PPDMIHOSTAUDIOPORT pInterface, bool fDefaultIn, bool fDefaultOut) + : m_fDefaultIn(fDefaultIn) + , m_fDefaultOut(fDefaultOut) + , m_fRegisteredClient(false) + , m_cRef(1) + , m_pIAudioNotifyFromHost(pInterface) +{ +} + +DrvHostAudioDSoundMMNotifClient::~DrvHostAudioDSoundMMNotifClient(void) +{ +} + +/** + * Registers the mulitmedia notification client implementation. + */ +HRESULT DrvHostAudioDSoundMMNotifClient::Register(void) +{ + HRESULT hr = m_pEnum->RegisterEndpointNotificationCallback(this); + if (SUCCEEDED(hr)) + m_fRegisteredClient = true; + + return hr; +} + +/** + * Unregisters the mulitmedia notification client implementation. + */ +void DrvHostAudioDSoundMMNotifClient::Unregister(void) +{ + if (m_fRegisteredClient) + { + m_pEnum->UnregisterEndpointNotificationCallback(this); + + m_fRegisteredClient = false; + } +} + +/** + * Initializes the mulitmedia notification client implementation. + * + * @return HRESULT + */ +HRESULT DrvHostAudioDSoundMMNotifClient::Initialize(void) +{ + HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), 0, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), + (void **)&m_pEnum); + + LogFunc(("Returning %Rhrc\n", hr)); + return hr; +} + +/** + * Handler implementation which is called when an audio device state + * has been changed. + * + * @return HRESULT + * @param pwstrDeviceId Device ID the state is announced for. + * @param dwNewState New state the device is now in. + */ +STDMETHODIMP DrvHostAudioDSoundMMNotifClient::OnDeviceStateChanged(LPCWSTR pwstrDeviceId, DWORD dwNewState) +{ + char *pszState = "unknown"; + + switch (dwNewState) + { + case DEVICE_STATE_ACTIVE: + pszState = "active"; + break; + case DEVICE_STATE_DISABLED: + pszState = "disabled"; + break; + case DEVICE_STATE_NOTPRESENT: + pszState = "not present"; + break; + case DEVICE_STATE_UNPLUGGED: + pszState = "unplugged"; + break; + default: + break; + } + + LogRel(("Audio: Device '%ls' has changed state to '%s'\n", pwstrDeviceId, pszState)); + + if (m_pIAudioNotifyFromHost) + m_pIAudioNotifyFromHost->pfnNotifyDevicesChanged(m_pIAudioNotifyFromHost); + + return S_OK; +} + +/** + * Handler implementation which is called when a new audio device has been added. + * + * @return HRESULT + * @param pwstrDeviceId Device ID which has been added. + */ +STDMETHODIMP DrvHostAudioDSoundMMNotifClient::OnDeviceAdded(LPCWSTR pwstrDeviceId) +{ + LogRel(("Audio: Device '%ls' has been added\n", pwstrDeviceId)); + /* Note! It is hard to properly support non-default devices when the backend is DSound, + as DSound talks GUID where-as the pwszDeviceId string we get here is something + completely different. So, ignorining that edge case here. The WasApi backend + supports this, though. */ + if (m_pIAudioNotifyFromHost) + m_pIAudioNotifyFromHost->pfnNotifyDevicesChanged(m_pIAudioNotifyFromHost); + return S_OK; +} + +/** + * Handler implementation which is called when an audio device has been removed. + * + * @return HRESULT + * @param pwstrDeviceId Device ID which has been removed. + */ +STDMETHODIMP DrvHostAudioDSoundMMNotifClient::OnDeviceRemoved(LPCWSTR pwstrDeviceId) +{ + LogRel(("Audio: Device '%ls' has been removed\n", pwstrDeviceId)); + if (m_pIAudioNotifyFromHost) + m_pIAudioNotifyFromHost->pfnNotifyDevicesChanged(m_pIAudioNotifyFromHost); + return S_OK; +} + +/** + * Handler implementation which is called when the device audio device has been + * changed. + * + * @return HRESULT + * @param eFlow Flow direction of the new default device. + * @param eRole Role of the new default device. + * @param pwstrDefaultDeviceId ID of the new default device. + */ +STDMETHODIMP DrvHostAudioDSoundMMNotifClient::OnDefaultDeviceChanged(EDataFlow eFlow, ERole eRole, LPCWSTR pwstrDefaultDeviceId) +{ + /* When the user triggers a default device change, we'll typically get two or + three notifications. Just pick up the one for the multimedia role for now + (dunno if DSound default equals eMultimedia or eConsole, and whether it make + any actual difference). */ + if (eRole == eMultimedia) + { + PDMAUDIODIR enmDir = PDMAUDIODIR_INVALID; + char *pszRole = "unknown"; + if (eFlow == eRender) + { + pszRole = "output"; + if (m_fDefaultOut) + enmDir = PDMAUDIODIR_OUT; + } + else if (eFlow == eCapture) + { + pszRole = "input"; + if (m_fDefaultIn) + enmDir = PDMAUDIODIR_IN; + } + + LogRel(("Audio: Default %s device has been changed to '%ls'\n", pszRole, pwstrDefaultDeviceId)); + + if (m_pIAudioNotifyFromHost) + { + if (enmDir != PDMAUDIODIR_INVALID) + m_pIAudioNotifyFromHost->pfnNotifyDeviceChanged(m_pIAudioNotifyFromHost, enmDir, NULL); + m_pIAudioNotifyFromHost->pfnNotifyDevicesChanged(m_pIAudioNotifyFromHost); + } + } + return S_OK; +} + +STDMETHODIMP DrvHostAudioDSoundMMNotifClient::QueryInterface(REFIID interfaceID, void **ppvInterface) +{ + const IID MY_IID_IMMNotificationClient = __uuidof(IMMNotificationClient); + + if ( IsEqualIID(interfaceID, IID_IUnknown) + || IsEqualIID(interfaceID, MY_IID_IMMNotificationClient)) + { + *ppvInterface = static_cast<IMMNotificationClient*>(this); + AddRef(); + return S_OK; + } + + *ppvInterface = NULL; + return E_NOINTERFACE; +} + +STDMETHODIMP_(ULONG) DrvHostAudioDSoundMMNotifClient::AddRef(void) +{ + return InterlockedIncrement(&m_cRef); +} + +STDMETHODIMP_(ULONG) DrvHostAudioDSoundMMNotifClient::Release(void) +{ + long lRef = InterlockedDecrement(&m_cRef); + if (lRef == 0) + delete this; + + return lRef; +} + |