src/ui-mobile/mobile-gst-element-factory.cpp

   1 /*
   2  * This file is based on Collabora example (QtGst-QmlSink)
   3  *
   4  *   Copyright (C) 2011 Lukáš Karas <lukas.karas@centrum.cz>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the
  18  *   Free Software Foundation, Inc.,
  19  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  */
  21
  22 #include <QGst/Bin>
  23 #include <QGst/ElementFactory>
  24
  25 #include <QtGui>
  26 #include <QtDeclarative>
  27 #include <QtOpenGL/QGLWidget>
  28 #include <gst/gst.h>
  29 #include <QtGstQmlSink/qmlvideosurfacegstsink.h>
  30 #include <QtGstQmlSink/qmlgstvideoitem.h>
  31
  32 #include "mobile-gst-element-factory.h"
  33
  34 MobileGstElementFactory::MobileGstElementFactory(QDeclarativeView *qmlView) : _qmlView(qmlView) {
  35
  36   g = new QGLWidget();
  37   _qmlView->setViewport(g);
  38
  39 }
  40
  41 MobileGstElementFactory::~MobileGstElementFactory() {
  42   if (g)
  43     g->deleteLater();
  44 }
  45
  46 QGst::ElementPtr MobileGstElementFactory::makeVideoOutputElement() {
  47   qDebug() << "MobileGstElementFactory: creating QmlPainterVideoSurface for GST";
  48
  49   // both the video sink and the video item need access to a
  50   // QmlPainterVideoSurface, which does accelerated drawing of video
  51   // frames
  52   QmlPainterVideoSurface *surface = new QmlPainterVideoSurface(this);
  53   surface->setGLContext((QGLContext *) g->context());
  54
  55   //surface->moveToThread(new QThread(this));
  56
  57   connect(surface, SIGNAL(frameChanged()), SLOT(onFrameChanged()));
  58
  59   GstElement *vsnk = GST_ELEMENT(QmlVideoSurfaceGstSink::createSink(surface));
  60   QGst::ElementPtr ptr = QGst::ElementPtr::wrap(vsnk, true);
  61
  62   _surfacesMap.insert(ptr, surface);
  63  // _glMap.insert(ptr, g);
  64
  65   return ptr;
  66 }
  67
  68 /**
  69  * just for debug...
  70  */
  71 void MobileGstElementFactory::onFrameChanged() {
  72   //qDebug() << "MobileGstElementFactory: frame changed";
  73 }
  74
  75 QmlPainterVideoSurface *MobileGstElementFactory::mapElementToSurface(QGst::ElementPtr element) {
  76   return _surfacesMap[ element ];
  77 }
  78
  79 bool MobileGstElementFactory::forgetElement(QGst::ElementPtr element) {
  80   // FIXME: is safe remove surface and gl widget?
  81   QmlPainterVideoSurface *surface = _surfacesMap[ element ];
  82   if (surface)
  83     surface->deleteLater();
  84   return _surfacesMap.remove(element);
  85 }
  86
  87 #include "mobile-gst-element-factory.moc"