API changes to QML element MediaPlayer aka Audio

Changed Video.qml for new API
Removed lowercase enum copies, replaced with calling
	parent (VideoOutput, MediaPlayer) enums
Removed properties playing, paused
Removed signals started, resumed
Added readonly property playbackState
Added signal playing
Added autoPlay property
Fixed unit tests for new API

Added backwards compatibility for QtMultimedia 4

Change-Id: I27c91cd46d91402b8c4c42bb7d4961ad67909aeb
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>

src/imports/multimedia/qdeclarativeaudio.cpp

@@ -166,7 +166,7 @@ QDeclarativeAudio::~QDeclarativeAudio()
 
     Starts playback of the media.
 
-    Sets the \l playing property to true, and the \l paused property to false.
+    Sets the \l playbackState property to PlayingState.
 */
 
 void QDeclarativeAudio::play()
@@ -174,8 +174,7 @@ void QDeclarativeAudio::play()
     if (!m_complete)
         return;
 
-    setPaused(false);
-    setPlaying(true);
+    setPlaybackState(QMediaPlayer::PlayingState);
 }
 
 /*!
@@ -183,7 +182,7 @@ void QDeclarativeAudio::play()
 
     Pauses playback of the media.
 
-    Sets the \l playing and \l paused properties to true.
+    Sets the \l playbackState property to PausedState.
 */
 
 void QDeclarativeAudio::pause()
@@ -191,8 +190,7 @@ void QDeclarativeAudio::pause()
     if (!m_complete)
         return;
 
-    setPaused(true);
-    setPlaying(true);
+    setPlaybackState(QMediaPlayer::PausedState);
 }
 
 /*!
@@ -200,7 +198,7 @@ void QDeclarativeAudio::pause()
 
     Stops playback of the media.
 
-    Sets the \l playing and \l paused properties to false.
+    Sets the \l playbackState property to StoppedState.
 */
 
 void QDeclarativeAudio::stop()
@@ -208,8 +206,7 @@ void QDeclarativeAudio::stop()
     if (!m_complete)
         return;
 
-    setPlaying(false);
-    setPaused(false);
+    setPlaybackState(QMediaPlayer::StoppedState);
 }
 
 /*!
@@ -227,45 +224,30 @@ void QDeclarativeAudio::stop()
 */
 
 /*!
-    \qmlproperty bool Audio::playing
+    \qmlsignal Audio::playbackStateChanged()
 
-    This property holds whether the media is playing.
-
-    Defaults to false, and can be set to true to start playback.
+    This handler is called when the \l playbackState property is altered.
 */
 
-/*!
-    \qmlproperty bool Audio::paused
-
-    This property holds whether the media is paused.
-
-    Defaults to false, and can be set to true to pause playback.
-*/
 
 /*!
-    \qmlsignal Audio::onStarted()
-
-    This handler is called when playback is started.
-*/
-
-/*!
-    \qmlsignal Audio::onResumed()
-
-    This handler is called when playback is resumed from the paused state.
-*/
-
-/*!
-    \qmlsignal Audio::onPaused()
+    \qmlsignal Audio::paused()
 
     This handler is called when playback is paused.
 */
 
 /*!
-    \qmlsignal Audio::onStopped()
+    \qmlsignal Audio::stopped()
 
     This handler is called when playback is stopped.
 */
 
+/*!
+    \qmlsignal Audio::playing()
+
+    This handler is called when playback is started or resumed.
+*/
+
 /*!
     \qmlproperty enumeration Audio::status
 
@@ -289,6 +271,32 @@ QDeclarativeAudio::Status QDeclarativeAudio::status() const
     return Status(m_status);
 }
 
+
+/*!
+    \qmlproperty enumeration Audio::playbackState
+
+    This property holds the state of media playback. It can be one of:
+
+    \list
+    \o PlayingState - the media is currently playing.
+    \o PausedState - playback of the media has been suspended.
+    \o StoppedState - playback of the media is yet to begin.
+    \endlist
+*/
+
+QDeclarativeAudio::PlaybackState QDeclarativeAudio::playbackState() const
+{
+    return PlaybackState(m_playbackState);
+}
+
+/*!
+    \qmlproperty int Audio::autoPlay
+
+    This property controls whether the media will begin to play on start up.
+
+    Defaults to false, if set true the value of autoLoad will be overwritten to true.
+*/
+
 /*!
     \qmlproperty int Audio::duration