Add background audio element.

Change-Id: I64c91beb7219cc148efc606e87e5f6e57b4b55ce Reviewed-on: http://codereview.qt.nokia.com/3574 Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com> Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
2011-08-25 17:43:31 +10:00
parent 955c3f21b8
commit 40c100ca3e
6 changed files with 244 additions and 5 deletions
--- a/src/imports/multimedia/qdeclarativebackgroundaudio.cpp
+++ b/src/imports/multimedia/qdeclarativebackgroundaudio.cpp
@@ -0,0 +1,137 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qdeclarativebackgroundaudio_p.h"
+#include <qmediabackgroundplaybackcontrol.h>
+#include <qmediaservice.h>
+
+void QDeclarativeBackgroundAudio::classBegin()
+{
+}
+
+void QDeclarativeBackgroundAudio::componentComplete()
+{
+    setObject(this, QMediaServiceProviderHint(QMediaServiceProviderHint::BackgroundPlayback));
+    if (m_mediaService) {
+        m_backgroundPlaybackControl =
+                static_cast<QMediaBackgroundPlaybackControl*>(
+                        m_mediaService->requestControl(QMediaBackgroundPlaybackControl_iid));
+        if (m_backgroundPlaybackControl) {
+            connect(m_backgroundPlaybackControl, SIGNAL(acquired()), this, SIGNAL(acquiredChanged()));
+            connect(m_backgroundPlaybackControl, SIGNAL(lost()), this, SIGNAL(acquiredChanged()));
+            if (!m_contextId.isEmpty())
+                m_backgroundPlaybackControl->setContextId(m_contextId);
+        } else {
+            qWarning("can not get QMediaBackgroundPlaybackControl!");
+        }
+    }
+    QDeclarativeMediaBase::componentComplete();
+}
+
+QDeclarativeBackgroundAudio::QDeclarativeBackgroundAudio(QObject *parent)
+    : QDeclarativeAudio(parent)
+    , m_backgroundPlaybackControl(0)
+{
+
+}
+
+QDeclarativeBackgroundAudio::~QDeclarativeBackgroundAudio()
+{
+    if (m_backgroundPlaybackControl)
+        m_mediaService->releaseControl(m_backgroundPlaybackControl);
+}
+
+/*!
+    \qmlproperty string BackgroundAudio::contextId
+
+    This property holds the unique contextId for the application
+
+    When a new contextId is set, the previously set contextId will be released automatically.
+*/
+QString QDeclarativeBackgroundAudio::contextId() const
+{
+    return m_contextId;
+}
+
+void QDeclarativeBackgroundAudio::setContextId(QString contextId)
+{
+    if (m_contextId == contextId)
+        return;
+    m_contextId = contextId;
+    if (m_backgroundPlaybackControl)
+        m_backgroundPlaybackControl->setContextId(m_contextId);
+    emit contextIdChanged();
+}
+
+/*!
+    \qmlproperty bool BackgroundAudio::acquired
+
+    This property indicates whether the application holds the playback resource in music daemon
+*/
+bool QDeclarativeBackgroundAudio::isAcquired() const
+{
+    if (!m_backgroundPlaybackControl)
+        return false;
+    return m_backgroundPlaybackControl->isAcquired();
+}
+
+/*!
+    \qmlmethod BackgroundAudio::acquire()
+
+    try to acquire the playback resource in music daemon
+*/
+void QDeclarativeBackgroundAudio::acquire()
+{
+    if (isAcquired() || !m_backgroundPlaybackControl)
+        return;
+    m_backgroundPlaybackControl->acquire();
+}
+
+/*!
+    \qmlmethod BackgroundAudio::acquire()
+
+    try to release the playback resource in music daemon
+*/
+void QDeclarativeBackgroundAudio::release()
+{
+    if (!isAcquired() || !m_backgroundPlaybackControl)
+        return;
+    m_backgroundPlaybackControl->release();
+}