Phonon MMF: fix state changes emitted during playlist handling

This change is required by the testPlayBeforeFinish step in
tst_mediaobject.  This test starts playback of one track, then calls
MediaObject::setCurrentSource() followed by MediaObject::play().  The
step checks that the following stateChanged() signals are emitted
by the MediaObject:

    1. StoppedState (optionally)
	2. LoadingState
	3. BufferingState or PlayingState

The state changes emitted by the Phonon MMF backend were:

    1. PlayingState -> StoppedState
	2. LoadingState -> PlayingState

This patch fixes the discontinuity in state changes which occurred
while processing a playlist.

Reviewed-by: Frans Englich

1 files changed, 5 insertions, 0 deletions

diff --git a/src/3rdparty/phonon/mmf/abstractplayer.cpp b/src/3rdparty/phonon/mmf/abstractplayer.cpp
index 8c3f5cb..77d7ae0 100644
--- a/src/3rdparty/phonon/mmf/abstractplayer.cpp
+++ b/src/3rdparty/phonon/mmf/abstractplayer.cpp
@@ -48,6 +48,11 @@ MMF::AbstractPlayer::AbstractPlayer(const AbstractPlayer *player)
         m_tickInterval = player->m_tickInterval;
         m_transitionTime = player->m_transitionTime;
         m_prefinishMark = player->m_prefinishMark;
+
+        // This is to prevent unwanted state transitions occurring as a result
+        // of MediaObject::switchToNextSource() during playlist playback.
+        if (StoppedState == player->m_state)
+            m_state = player->m_state;
     }
 }