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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "QtCore/qdebug.h"
#include "mfaudioendpointcontrol.h"
MFAudioEndpointControl::MFAudioEndpointControl(QObject *parent)
: QAudioOutputSelectorControl(parent)
, m_currentActivate(0)
{
updateEndpoints();
setActiveOutput(m_defaultEndpoint);
}
MFAudioEndpointControl::~MFAudioEndpointControl()
{
foreach (LPWSTR wstrID, m_devices)
CoTaskMemFree(wstrID);
if (m_currentActivate)
m_currentActivate->Release();
}
QList<QString> MFAudioEndpointControl::availableOutputs() const
{
return m_devices.keys();
}
QString MFAudioEndpointControl::outputDescription(const QString &name) const
{
return name.section(QLatin1Char('\\'), -1);
}
QString MFAudioEndpointControl::defaultOutput() const
{
return m_defaultEndpoint;
}
QString MFAudioEndpointControl::activeOutput() const
{
return m_activeEndpoint;
}
void MFAudioEndpointControl::setActiveOutput(const QString &name)
{
if (m_activeEndpoint == name)
return;
QMap<QString, LPWSTR>::iterator it = m_devices.find(name);
if (it == m_devices.end())
return;
LPWSTR wstrID = *it;
IMFActivate *activate = NULL;
HRESULT hr = MFCreateAudioRendererActivate(&activate);
if (FAILED(hr)) {
qWarning() << "Failed to create audio renderer activate";
return;
}
if (wstrID) {
hr = activate->SetString(MF_AUDIO_RENDERER_ATTRIBUTE_ENDPOINT_ID, wstrID);
} else {
//This is the default one that has been inserted in updateEndpoints(),
//so give the activate a hint that we want to use the device for multimedia playback
//then the media foundation will choose an appropriate one.
//from MSDN:
//The ERole enumeration defines constants that indicate the role that the system has assigned to an audio endpoint device.
//eMultimedia: Music, movies, narration, and live music recording.
hr = activate->SetUINT32(MF_AUDIO_RENDERER_ATTRIBUTE_ENDPOINT_ROLE, eMultimedia);
}
if (FAILED(hr)) {
qWarning() << "Failed to set attribute for audio device" << name;
return;
}
if (m_currentActivate)
m_currentActivate->Release();
m_currentActivate = activate;
m_activeEndpoint = name;
}
IMFActivate* MFAudioEndpointControl::currentActivate() const
{
return m_currentActivate;
}
void MFAudioEndpointControl::updateEndpoints()
{
m_defaultEndpoint = QString::fromLatin1("Default");
m_devices.insert(m_defaultEndpoint, NULL);
IMMDeviceEnumerator *pEnum = NULL;
HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator),
NULL, CLSCTX_ALL,
__uuidof(IMMDeviceEnumerator),
(void**)&pEnum);
if (SUCCEEDED(hr)) {
IMMDeviceCollection *pDevices = NULL;
hr = pEnum->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &pDevices);
if (SUCCEEDED(hr)) {
UINT count;
hr = pDevices->GetCount(&count);
if (SUCCEEDED(hr)) {
for (UINT i = 0; i < count; ++i) {
IMMDevice *pDevice = NULL;
hr = pDevices->Item(i, &pDevice);
if (SUCCEEDED(hr)) {
LPWSTR wstrID = NULL;
hr = pDevice->GetId(&wstrID);
if (SUCCEEDED(hr)) {
QString deviceId = QString::fromWCharArray(wstrID);
m_devices.insert(deviceId, wstrID);
}
pDevice->Release();
}
}
}
pDevices->Release();
}
pEnum->Release();
}
}
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