player: added volume control

4 files changed, 53 insertions, 1 deletions

diff --git a/examples/player/mediaapp.cpp b/examples/player/mediaapp.cpp
index 75a4d5c..7802b1e 100644
--- a/examples/player/mediaapp.cpp
+++ b/examples/player/mediaapp.cpp
@@ -99,6 +99,9 @@ void MediaApp::onStateChanged()
     m_pauseButton->setEnabled(newState == QGst::StatePlaying);
     m_stopButton->setEnabled(newState != QGst::StateNull);
     m_positionSlider->setEnabled(newState != QGst::StateNull);
+    m_volumeSlider->setEnabled(newState != QGst::StateNull);
+    m_volumeLabel->setEnabled(newState != QGst::StateNull);
+    m_volumeSlider->setValue(m_player->volume());
 
     //if we are in Null state, call onPositionChanged() to restore
     //the position of the slider and the text on the label
@@ -155,6 +158,8 @@ void MediaApp::showControls(bool show)
     m_stopButton->setVisible(show);
     m_fullScreenButton->setVisible(show);
     m_positionSlider->setVisible(show);
+    m_volumeSlider->setVisible(show);
+    m_volumeLabel->setVisible(show);
     m_positionLabel->setVisible(show);
 }
 
@@ -193,6 +198,14 @@ void MediaApp::createUI(QBoxLayout *appLayout)
 
     connect(m_positionSlider, SIGNAL(sliderMoved(int)), this, SLOT(setPosition(int)));
 
+    m_volumeSlider = new QSlider(Qt::Horizontal);
+    m_volumeSlider->setTickPosition(QSlider::TicksLeft);
+    m_volumeSlider->setTickInterval(2);
+    m_volumeSlider->setMaximum(10);
+    m_volumeSlider->setMaximumSize(64,32);
+
+    connect(m_volumeSlider, SIGNAL(sliderMoved(int)), m_player, SLOT(setVolume(int)));
+
     QGridLayout *posLayout = new QGridLayout;
     posLayout->addWidget(m_positionLabel, 1, 0);
     posLayout->addWidget(m_positionSlider, 1, 1, 1, 2);
@@ -215,8 +228,15 @@ void MediaApp::createUI(QBoxLayout *appLayout)
 
     m_fullScreenButton = initButton(QStyle::SP_TitleBarMaxButton, tr("Fullscreen"),
                                     this, SLOT(toggleFullScreen()), btnLayout);
-
     btnLayout->addStretch();
+
+    m_volumeLabel = new QLabel();
+    m_volumeLabel->setPixmap(
+        style()->standardIcon(QStyle::SP_MediaVolume).pixmap(QSize(32, 32),
+                QIcon::Normal, QIcon::On));
+
+    btnLayout->addWidget(m_volumeLabel);
+    btnLayout->addWidget(m_volumeSlider);
     appLayout->addLayout(btnLayout);
 }
 
diff --git a/examples/player/mediaapp.h b/examples/player/mediaapp.h
index 7fbf20a..2e50a15 100644
--- a/examples/player/mediaapp.h
+++ b/examples/player/mediaapp.h
@@ -67,7 +67,9 @@ private:
     QToolButton *m_pauseButton;
     QToolButton *m_stopButton;
     QSlider *m_positionSlider;
+    QSlider *m_volumeSlider;
     QLabel *m_positionLabel;
+    QLabel *m_volumeLabel;
     QTimer m_fullScreenTimer;
 };
 
diff --git a/examples/player/player.cpp b/examples/player/player.cpp
index 73266f0..6266644 100644
--- a/examples/player/player.cpp
+++ b/examples/player/player.cpp
@@ -27,6 +27,7 @@
 #include <QGst/Query>
 #include <QGst/ClockTime>
 #include <QGst/Event>
+#include <QGst/StreamVolume>
 
 Player::Player(QWidget *parent)
     : QGst::Ui::VideoWidget(parent)
@@ -97,6 +98,33 @@ void Player::setPosition(const QTime & pos)
     m_pipeline->sendEvent(evt);
 }
 
+int Player::volume() const
+{
+    if (m_pipeline) {
+        QGst::StreamVolumePtr svp =
+            m_pipeline.dynamicCast<QGst::StreamVolume>();
+
+        if (svp) {
+            return svp->volume(QGst::StreamVolumeFormatCubic) * 10;
+        }
+    }
+
+    return 0;
+}
+
+
+void Player::setVolume(int volume)
+{
+    if (m_pipeline) {
+        QGst::StreamVolumePtr svp =
+            m_pipeline.dynamicCast<QGst::StreamVolume>();
+
+        if(svp) {
+            svp->setVolume((double)volume / 10, QGst::StreamVolumeFormatCubic);
+        }
+    }
+}
+
 QTime Player::length() const
 {
     if (m_pipeline) {
diff --git a/examples/player/player.h b/examples/player/player.h
index 1110e8c..3a42ca2 100644
--- a/examples/player/player.h
+++ b/examples/player/player.h
@@ -35,6 +35,7 @@ public:
 
     QTime position() const;
     void setPosition(const QTime & pos);
+    int volume() const;
 
     QTime length() const;
     QGst::State state() const;
@@ -43,6 +44,7 @@ public Q_SLOTS:
     void play();
     void pause();
     void stop();
+    void setVolume(int volume);
 
 Q_SIGNALS:
     void positionChanged();