Split gstreamer plugin into smaller plugins providing fewer services

The gstreamer blob has been split into four plugins: audiodecoder,
camerabin, mediacapture, and mediaplayer.
Note: camerabin is still disabled because it is untested camerabin2
implementation.
A new qmake configuration use_gstreamer_camera has been introduced
and is needed for the mediacapture plugin to expose the camera
service. This configuration has been disabled by default.
Shared functionality has been moved to the internal gsttools library.

Change-Id: Ifb2604f440cfa97513d39f5d7978766c88eaec45
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

1 files changed, 346 insertions, 0 deletions

diff --git a/src/gsttools/qgstreamervideowindow.cpp b/src/gsttools/qgstreamervideowindow.cpp
new file mode 100644
index 000000000..077060fd2
--- /dev/null
+++ b/src/gsttools/qgstreamervideowindow.cpp
@@ -0,0 +1,346 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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 "qgstreamervideowindow_p.h"
+#include <private/qgstutils_p.h>
+
+#include <QtCore/qdebug.h>
+
+#include <gst/gst.h>
+#include <gst/interfaces/xoverlay.h>
+#include <gst/interfaces/propertyprobe.h>
+
+/*
+   QGstreamerVideoWindow is similar to QGstreamerVideoOverlay,
+   but uses xvimagesink like gstreamer element instead of QX11VideoSurface.
+
+   This allows to use the accelerated elements if available on the target platform,
+   but requires at least 0.10.29 gstreamer version
+   with gst_x_overlay_set_render_rectangle to set display rect.
+*/
+
+QGstreamerVideoWindow::QGstreamerVideoWindow(QObject *parent, const char *elementName)
+    : QVideoWindowControl(parent)
+    , m_videoSink(0)
+    , m_windowId(0)
+    , m_aspectRatioMode(Qt::KeepAspectRatio)
+    , m_fullScreen(false)
+    , m_colorKey(QColor::Invalid)
+{
+    if (elementName)
+        m_videoSink = gst_element_factory_make(elementName, NULL);
+    else
+        m_videoSink = gst_element_factory_make("xvimagesink", NULL);
+
+    if (m_videoSink) {
+        gst_object_ref(GST_OBJECT(m_videoSink)); //Take ownership
+        gst_object_sink(GST_OBJECT(m_videoSink));
+
+        GstPad *pad = gst_element_get_static_pad(m_videoSink,"sink");
+        m_bufferProbeId = gst_pad_add_buffer_probe(pad, G_CALLBACK(padBufferProbe), this);
+    }
+}
+
+QGstreamerVideoWindow::~QGstreamerVideoWindow()
+{
+    if (m_videoSink)
+        gst_object_unref(GST_OBJECT(m_videoSink));
+}
+
+WId QGstreamerVideoWindow::winId() const
+{
+    return m_windowId;
+}
+
+void QGstreamerVideoWindow::setWinId(WId id)
+{
+    if (m_windowId == id)
+        return;
+
+    qDebug() << Q_FUNC_INFO << id;
+
+    WId oldId = m_windowId;
+
+    m_windowId = id;
+
+    if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) {
+        gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(m_videoSink), m_windowId);
+    }
+
+    if (!oldId)
+        emit readyChanged(true);
+
+    if (!id)
+        emit readyChanged(false);
+}
+
+bool QGstreamerVideoWindow::processSyncMessage(const QGstreamerMessage &message)
+{
+    GstMessage* gm = message.rawMessage();
+
+    if ((GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) &&
+            gst_structure_has_name(gm->structure, "prepare-xwindow-id") &&
+            m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) {
+
+        gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(m_videoSink), m_windowId);
+
+        GstPad *pad = gst_element_get_static_pad(m_videoSink,"sink");
+        m_bufferProbeId = gst_pad_add_buffer_probe(pad, G_CALLBACK(padBufferProbe), this);
+
+        return true;
+    }
+
+    return false;
+}
+
+QRect QGstreamerVideoWindow::displayRect() const
+{
+    return m_displayRect;
+}
+
+void QGstreamerVideoWindow::setDisplayRect(const QRect &rect)
+{
+    m_displayRect = rect;
+
+    if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) {
+#if GST_VERSION_MICRO >= 29
+        if (m_displayRect.isEmpty())
+            gst_x_overlay_set_render_rectangle(GST_X_OVERLAY(m_videoSink), -1, -1, -1, -1);
+        else
+            gst_x_overlay_set_render_rectangle(GST_X_OVERLAY(m_videoSink),
+                                               m_displayRect.x(),
+                                               m_displayRect.y(),
+                                               m_displayRect.width(),
+                                               m_displayRect.height());
+        repaint();
+#endif
+    }
+}
+
+Qt::AspectRatioMode QGstreamerVideoWindow::aspectRatioMode() const
+{
+    return m_aspectRatioMode;
+}
+
+void QGstreamerVideoWindow::setAspectRatioMode(Qt::AspectRatioMode mode)
+{
+    m_aspectRatioMode = mode;
+
+    if (m_videoSink) {
+        g_object_set(G_OBJECT(m_videoSink),
+                     "force-aspect-ratio",
+                     (m_aspectRatioMode == Qt::KeepAspectRatio),
+                     (const char*)NULL);
+    }
+}
+
+void QGstreamerVideoWindow::repaint()
+{
+    if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) {
+        //don't call gst_x_overlay_expose if the sink is in null state
+        GstState state = GST_STATE_NULL;
+        GstStateChangeReturn res = gst_element_get_state(m_videoSink, &state, NULL, 1000000);
+        if (res != GST_STATE_CHANGE_FAILURE && state != GST_STATE_NULL) {
+            gst_x_overlay_expose(GST_X_OVERLAY(m_videoSink));
+        }
+    }
+}
+
+QColor QGstreamerVideoWindow::colorKey() const
+{
+    if (!m_colorKey.isValid()) {
+        gint colorkey = 0;
+        if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "colorkey"))
+            g_object_get(G_OBJECT(m_videoSink), "colorkey", &colorkey, NULL);
+
+        if (colorkey > 0)
+            m_colorKey.setRgb(colorkey);
+    }
+
+    return m_colorKey;
+}
+
+void QGstreamerVideoWindow::setColorKey(const QColor &color)
+{
+    m_colorKey = color;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "colorkey"))
+        g_object_set(G_OBJECT(m_videoSink), "colorkey", color.rgba(), NULL);
+}
+
+bool QGstreamerVideoWindow::autopaintColorKey() const
+{
+    bool enabled = true;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "autopaint-colorkey"))
+        g_object_get(G_OBJECT(m_videoSink), "autopaint-colorkey", &enabled, NULL);
+
+    return enabled;
+}
+
+void QGstreamerVideoWindow::setAutopaintColorKey(bool enabled)
+{
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "autopaint-colorkey"))
+        g_object_set(G_OBJECT(m_videoSink), "autopaint-colorkey", enabled, NULL);
+}
+
+int QGstreamerVideoWindow::brightness() const
+{
+    int brightness = 0;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness"))
+        g_object_get(G_OBJECT(m_videoSink), "brightness", &brightness, NULL);
+
+    return brightness / 10;
+}
+
+void QGstreamerVideoWindow::setBrightness(int brightness)
+{
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) {
+        g_object_set(G_OBJECT(m_videoSink), "brightness", brightness * 10, NULL);
+
+        emit brightnessChanged(brightness);
+    }
+}
+
+int QGstreamerVideoWindow::contrast() const
+{
+    int contrast = 0;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast"))
+        g_object_get(G_OBJECT(m_videoSink), "contrast", &contrast, NULL);
+
+    return contrast / 10;
+}
+
+void QGstreamerVideoWindow::setContrast(int contrast)
+{
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) {
+        g_object_set(G_OBJECT(m_videoSink), "contrast", contrast * 10, NULL);
+
+        emit contrastChanged(contrast);
+    }
+}
+
+int QGstreamerVideoWindow::hue() const
+{
+    int hue = 0;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue"))
+        g_object_get(G_OBJECT(m_videoSink), "hue", &hue, NULL);
+
+    return hue / 10;
+}
+
+void QGstreamerVideoWindow::setHue(int hue)
+{
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) {
+        g_object_set(G_OBJECT(m_videoSink), "hue", hue * 10, NULL);
+
+        emit hueChanged(hue);
+    }
+}
+
+int QGstreamerVideoWindow::saturation() const
+{
+    int saturation = 0;
+
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation"))
+        g_object_get(G_OBJECT(m_videoSink), "saturation", &saturation, NULL);
+
+    return saturation / 10;
+}
+
+void QGstreamerVideoWindow::setSaturation(int saturation)
+{
+    if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) {
+        g_object_set(G_OBJECT(m_videoSink), "saturation", saturation * 10, NULL);
+
+        emit saturationChanged(saturation);
+    }
+}
+
+bool QGstreamerVideoWindow::isFullScreen() const
+{
+    return m_fullScreen;
+}
+
+void QGstreamerVideoWindow::setFullScreen(bool fullScreen)
+{
+    emit fullScreenChanged(m_fullScreen = fullScreen);
+}
+
+QSize QGstreamerVideoWindow::nativeSize() const
+{
+    return m_nativeSize;
+}
+
+void QGstreamerVideoWindow::padBufferProbe(GstPad *pad, GstBuffer * /* buffer */, gpointer user_data)
+{
+    QGstreamerVideoWindow *control = reinterpret_cast<QGstreamerVideoWindow*>(user_data);
+    QMetaObject::invokeMethod(control, "updateNativeVideoSize", Qt::QueuedConnection);
+    gst_pad_remove_buffer_probe(pad, control->m_bufferProbeId);
+}
+
+void QGstreamerVideoWindow::updateNativeVideoSize()
+{
+    const QSize oldSize = m_nativeSize;
+    m_nativeSize = QSize();
+
+    if (m_videoSink) {
+        //find video native size to update video widget size hint
+        GstPad *pad = gst_element_get_static_pad(m_videoSink,"sink");
+        GstCaps *caps = gst_pad_get_negotiated_caps(pad);
+
+        if (caps) {
+            m_nativeSize = QGstUtils::capsCorrectedResolution(caps);
+            gst_caps_unref(caps);
+        }
+    }
+
+    if (m_nativeSize != oldSize)
+        emit nativeSizeChanged();
+}
+
+GstElement *QGstreamerVideoWindow::videoSink()
+{
+    return m_videoSink;
+}