Android: refactor video renderer.

Removed the overhead of having to create a shared OpenGL context in the GUI
thread and pre-render the frame into a FBO.

We now directly render the GL_TEXTURE_EXTERNAL_OES in the QtQuick render
thread, using an Android-specific QSGVideoNode.
We also use a callback from the render thread to create the texture from
there and not have to create a separate shared OpenGL context.

Change-Id: I6c8eb94b47d0a03329c912701b8af3fb5ebd1876
Reviewed-by: Christian Stromme <christian.stromme@digia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/imports/multimedia/qdeclarativevideooutput_render.cpp b/src/imports/multimedia/qdeclarativevideooutput_render.cpp
index 002f50a62..cd03cd6b8 100644
--- a/src/imports/multimedia/qdeclarativevideooutput_render.cpp
+++ b/src/imports/multimedia/qdeclarativevideooutput_render.cpp
@@ -193,6 +193,13 @@ QSGNode *QDeclarativeVideoRendererBackend::updatePaintNode(QSGNode *oldNode,
     if (!m_glContext) {
         m_glContext = QOpenGLContext::currentContext();
         m_surface->scheduleOpenGLContextUpdate();
+
+        // Internal mechanism to call back the surface renderer from the QtQuick render thread
+        QObject *obj = m_surface->property("_q_GLThreadCallback").value<QObject*>();
+        if (obj) {
+            QEvent ev(QEvent::User);
+            obj->event(&ev);
+        }
     }
 
     if (m_frameChanged) {