Added QMediaRecorder::status property

QMediaRecorder::state property represents the user request and
changed synchronously during record(), pause() or stop() calls.

Recorder status is changed asynchronously
and represents the actual status of media recorder.

This also makes API more consistent with QMediaPlayer and QCamera.

Change-Id: I80b4aaa70bb88e555c492908da8c29d0fc5ed5ea
Reviewed-by: Ling Hu <ling.hu@nokia.com>

src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.cpp

@@ -46,10 +46,13 @@
 #include <QtCore/QDebug>
 
 QGstreamerRecorderControl::QGstreamerRecorderControl(QGstreamerCaptureSession *session)
-    :QMediaRecorderControl(session), m_session(session), m_state(QMediaRecorder::StoppedState)
+    :QMediaRecorderControl(session),
+      m_session(session),
+      m_state(QMediaRecorder::StoppedState),
+      m_status(QMediaRecorder::UnloadedStatus)
 {
-    connect(m_session, SIGNAL(stateChanged(QGstreamerCaptureSession::State)), SLOT(updateState()));
-    connect(m_session, SIGNAL(error(int,QString)), SIGNAL(error(int,QString)));
+    connect(m_session, SIGNAL(stateChanged(QGstreamerCaptureSession::State)), SLOT(updateStatus()));
+    connect(m_session, SIGNAL(error(int,QString)), SLOT(handleSessionError(int,QString)));
     connect(m_session, SIGNAL(durationChanged(qint64)), SIGNAL(durationChanged(qint64)));
     connect(m_session, SIGNAL(mutedChanged(bool)), SIGNAL(mutedChanged(bool)));
     m_hasPreviewState = m_session->captureMode() != QGstreamerCaptureSession::Audio;
@@ -74,27 +77,48 @@ bool QGstreamerRecorderControl::setOutputLocation(const QUrl &sink)
 
 QMediaRecorder::State QGstreamerRecorderControl::state() const
 {
-    switch ( m_session->state() ) {
-        case QGstreamerCaptureSession::RecordingState:
-            return QMediaRecorder::RecordingState;
-        case QGstreamerCaptureSession::PausedState:
-            return QMediaRecorder::PausedState;
-        case QGstreamerCaptureSession::PreviewState:
-        case QGstreamerCaptureSession::StoppedState:
-            return QMediaRecorder::StoppedState;
-    }
-
-    return QMediaRecorder::StoppedState;
-
+    return m_state;
 }
 
-void QGstreamerRecorderControl::updateState()
+QMediaRecorder::Status QGstreamerRecorderControl::status() const
 {
-    QMediaRecorder::State newState = state();
-    if (m_state != newState) {
-        m_state = newState;
-        emit stateChanged(m_state);
+    static QMediaRecorder::Status statusTable[3][3] = {
+        //Stopped recorder state:
+        { QMediaRecorder::LoadedStatus, QMediaRecorder::FinalizingStatus, QMediaRecorder::FinalizingStatus },
+        //Recording recorder state:
+        { QMediaRecorder::StartingStatus, QMediaRecorder::RecordingStatus, QMediaRecorder::PausedStatus },
+        //Paused recorder state:
+        { QMediaRecorder::StartingStatus, QMediaRecorder::RecordingStatus, QMediaRecorder::PausedStatus }
+    };
+
+    QMediaRecorder::State sessionState = QMediaRecorder::StoppedState;
+
+    switch ( m_session->state() ) {
+        case QGstreamerCaptureSession::RecordingState:
+            sessionState = QMediaRecorder::RecordingState;
+        case QGstreamerCaptureSession::PausedState:
+            sessionState = QMediaRecorder::PausedState;
+        case QGstreamerCaptureSession::PreviewState:
+        case QGstreamerCaptureSession::StoppedState:
+            sessionState = QMediaRecorder::StoppedState;
     }
+
+    return statusTable[m_state][sessionState];
+}
+
+void QGstreamerRecorderControl::updateStatus()
+{
+    QMediaRecorder::Status newStatus = status();
+    if (m_status != newStatus) {
+        m_status = newStatus;
+        emit statusChanged(m_status);
+    }
+}
+
+void QGstreamerRecorderControl::handleSessionError(int code, const QString &description)
+{
+    emit error(code, description);
+    stop();
 }
 
 qint64 QGstreamerRecorderControl::duration() const
@@ -104,6 +128,11 @@ qint64 QGstreamerRecorderControl::duration() const
 
 void QGstreamerRecorderControl::record()
 {
+    if (m_state == QMediaRecorder::RecordingState)
+        return;
+
+    m_state = QMediaRecorder::RecordingState;
+
     if (m_outputLocation.isEmpty()) {
         QString container = m_session->mediaContainerControl()->containerExtension();
         if (container.isEmpty())
@@ -119,25 +148,44 @@ void QGstreamerRecorderControl::record()
         emit error(QMediaRecorder::ResourceError, tr("Service has not been started"));
 
     m_session->dumpGraph("after-record");
+
+    emit stateChanged(m_state);
+    updateStatus();
 }
 
 void QGstreamerRecorderControl::pause()
 {
+    if (m_state == QMediaRecorder::PausedState)
+        return;
+
+    m_state = QMediaRecorder::PausedState;
+
     m_session->dumpGraph("before-pause");
     if (!m_hasPreviewState || m_session->state() != QGstreamerCaptureSession::StoppedState) {
         m_session->setState(QGstreamerCaptureSession::PausedState);
     } else
         emit error(QMediaRecorder::ResourceError, tr("Service has not been started"));
+
+    emit stateChanged(m_state);
+    updateStatus();
 }
 
 void QGstreamerRecorderControl::stop()
 {
+    if (m_state == QMediaRecorder::StoppedState)
+        return;
+
+    m_state = QMediaRecorder::StoppedState;
+
     if (!m_hasPreviewState) {
         m_session->setState(QGstreamerCaptureSession::StoppedState);
     } else {
         if (m_session->state() != QGstreamerCaptureSession::StoppedState)
             m_session->setState(QGstreamerCaptureSession::PreviewState);
     }
+
+    emit stateChanged(m_state);
+    updateStatus();
 }
 
 void QGstreamerRecorderControl::applySettings()

src/plugins/gstreamer/mediacapture/qgstreamerrecordercontrol.h

@@ -62,6 +62,7 @@ public:
     bool setOutputLocation(const QUrl &sink);
 
     QMediaRecorder::State state() const;
+    QMediaRecorder::Status status() const;
 
     qint64 duration() const;
 
@@ -76,7 +77,8 @@ public slots:
     void setMuted(bool);
 
 private slots:
-    void updateState();
+    void updateStatus();
+    void handleSessionError(int code, const QString &description);
 
 private:
     QDir defaultDir() const;
@@ -85,6 +87,7 @@ private:
     QUrl m_outputLocation;
     QGstreamerCaptureSession *m_session;
     QMediaRecorder::State m_state;
+    QMediaRecorder::Status m_status;
     bool m_hasPreviewState;
 };