2014-04-29 06:38:55 +00:00
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/*
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* GStreamer
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* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
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* Copyright (C) 2009 Andrey Nechypurenko <andreynech@gmail.com>
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* Copyright (C) 2010 Nuno Santos <nunosantos@imaginando.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <QGLWidget>
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#include <QApplication>
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2014-07-01 00:36:53 +00:00
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#include <QDebug>
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2014-04-29 06:38:55 +00:00
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#include <QCloseEvent>
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2014-09-28 14:23:57 +00:00
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#include <GL/glx.h>
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2014-04-29 06:38:55 +00:00
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#include <gst/video/video.h>
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#include <gst/gl/gstglmemory.h>
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2014-09-28 14:23:57 +00:00
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#if GST_GL_HAVE_PLATFORM_GLX
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#include <QX11Info>
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#include <gst/gl/x11/gstgldisplay_x11.h>
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#endif
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2014-04-29 06:38:55 +00:00
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#include "gstthread.h"
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#include "qglrenderer.h"
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#include "pipeline.h"
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#if defined(Q_WS_MAC)
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2014-09-28 14:23:57 +00:00
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extern void *qt_current_nsopengl_context ();
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2014-04-29 06:38:55 +00:00
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#endif
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2014-09-28 14:23:57 +00:00
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QGLRenderer::QGLRenderer (const QString & videoLocation, QWidget * parent)
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:
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QGLWidget (parent),
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videoLoc (videoLocation),
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gst_thread (NULL),
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closing (false),
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frame (NULL)
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2014-04-29 06:38:55 +00:00
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{
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2014-09-28 14:23:57 +00:00
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move (20, 10);
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resize (640, 480);
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2014-04-29 06:38:55 +00:00
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}
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2014-09-28 14:23:57 +00:00
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QGLRenderer::~QGLRenderer ()
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2014-04-29 06:38:55 +00:00
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{
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}
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void
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2014-09-28 14:23:57 +00:00
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QGLRenderer::initializeGL ()
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2014-04-29 06:38:55 +00:00
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{
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2014-09-28 14:23:57 +00:00
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GstGLContext *context;
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GstGLDisplay *display;
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#if GST_GL_HAVE_PLATFORM_GLX
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display =
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(GstGLDisplay *) gst_gl_display_x11_new_with_display (QX11Info::
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display ());
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#else
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display = gst_gl_display_new ();
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#endif
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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/* FIXME: Allow the choice at runtime */
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2014-07-01 00:36:53 +00:00
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#if GST_GL_HAVE_PLATFORM_WGL
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2014-09-28 14:23:57 +00:00
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context =
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gst_gl_context_new_wrapped (display, (guintptr) wglGetCurrentContext (),
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GST_GL_PLATFORM_WGL, GST_GL_API_OPENGL);
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2014-07-01 00:36:53 +00:00
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#elif GST_GL_HAVE_PLATFORM_CGL
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2014-09-28 14:23:57 +00:00
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context =
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gst_gl_context_new_wrapped (display,
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(guintptr) qt_current_nsopengl_context (), GST_GL_PLATFORM_CGL,
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GST_GL_API_OPENGL);
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2014-07-01 00:36:53 +00:00
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#elif GST_GL_HAVE_PLATFORM_GLX
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2014-09-28 14:23:57 +00:00
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context =
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gst_gl_context_new_wrapped (display, (guintptr) glXGetCurrentContext (),
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GST_GL_PLATFORM_GLX, GST_GL_API_OPENGL);
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2014-04-29 06:38:55 +00:00
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#endif
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2014-09-28 14:23:57 +00:00
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gst_object_unref (display);
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// We need to unset Qt context before initializing gst-gl plugin.
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// Otherwise the attempt to share gst-gl context with Qt will fail.
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this->doneCurrent ();
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this->gst_thread =
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new GstThread (display, context, this->videoLoc,
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SLOT (newFrame ()), this);
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this->makeCurrent ();
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QObject::connect (this->gst_thread, SIGNAL (finished ()),
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this, SLOT (close ()));
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QObject::connect (this, SIGNAL (closeRequested ()),
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this->gst_thread, SLOT (stop ()), Qt::QueuedConnection);
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qglClearColor (QApplication::palette ().color (QPalette::Active,
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QPalette::Window));
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//glShadeModel(GL_FLAT);
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//glEnable(GL_DEPTH_TEST);
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//glEnable(GL_CULL_FACE);
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glEnable (GL_TEXTURE_2D); // Enable Texture Mapping
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this->gst_thread->start ();
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2014-04-29 06:38:55 +00:00
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}
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void
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2014-09-28 14:23:57 +00:00
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QGLRenderer::resizeGL (int width, int height)
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2014-04-29 06:38:55 +00:00
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{
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// Reset The Current Viewport And Perspective Transformation
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2014-09-28 14:23:57 +00:00
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glViewport (0, 0, width, height);
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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gluPerspective (45.0f, (GLfloat) width / (GLfloat) height, 0.1f, 100.0f);
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glMatrixMode (GL_MODELVIEW);
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2014-04-29 06:38:55 +00:00
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}
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void
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2014-09-28 14:23:57 +00:00
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QGLRenderer::newFrame ()
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2014-04-29 06:38:55 +00:00
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{
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2014-09-28 14:23:57 +00:00
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Pipeline *pipeline = this->gst_thread->getPipeline ();
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if (!pipeline)
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return;
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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/* frame is initialized as null */
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if (this->frame)
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pipeline->queue_output_buf.put (this->frame);
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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this->frame = pipeline->queue_input_buf.get ();
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2014-04-29 06:38:55 +00:00
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2014-09-28 14:23:57 +00:00
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/* direct call to paintGL (no queued) */
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this->updateGL ();
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2014-04-29 06:38:55 +00:00
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}
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2014-09-28 14:23:57 +00:00
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static void
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flushGstreamerGL (GstGLContext * context, void *data G_GNUC_UNUSED)
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{
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context->gl_vtable->Flush ();
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2014-08-26 08:21:42 +00:00
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}
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2014-04-29 06:38:55 +00:00
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void
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2014-09-28 14:23:57 +00:00
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QGLRenderer::paintGL ()
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2014-04-29 06:38:55 +00:00
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{
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2014-09-28 14:23:57 +00:00
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static GLfloat xrot = 0;
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static GLfloat yrot = 0;
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static GLfloat zrot = 0;
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if (this->frame) {
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guint tex_id;
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GstMemory *mem;
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GstVideoInfo v_info;
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GstVideoFrame v_frame;
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GstVideoMeta *v_meta;
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mem = gst_buffer_peek_memory (this->frame, 0);
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v_meta = gst_buffer_get_video_meta (this->frame);
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Q_ASSERT (gst_is_gl_memory (mem));
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GstGLMemory *gl_memory = (GstGLMemory *) mem;
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gst_gl_context_thread_add (gl_memory->context, flushGstreamerGL, NULL);
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gst_video_info_set_format (&v_info, v_meta->format, v_meta->width,
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v_meta->height);
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gst_video_frame_map (&v_frame, &v_info, this->frame,
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(GstMapFlags) (GST_MAP_READ | GST_MAP_GL));
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tex_id = *(guint *) v_frame.data[0];
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glEnable (GL_DEPTH_TEST);
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glEnable (GL_TEXTURE_2D);
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glBindTexture (GL_TEXTURE_2D, tex_id);
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if (glGetError () != GL_NO_ERROR) {
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qDebug ("failed to bind texture that comes from gst-gl");
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emit closeRequested ();
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return;
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2014-04-29 06:38:55 +00:00
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}
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2014-09-28 14:23:57 +00:00
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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glTranslatef (0.0f, 0.0f, -5.0f);
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glRotatef (xrot, 1.0f, 0.0f, 0.0f);
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glRotatef (yrot, 0.0f, 1.0f, 0.0f);
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glRotatef (zrot, 0.0f, 0.0f, 1.0f);
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glBegin (GL_QUADS);
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// Front Face
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (-1.0f, -1.0f, 1.0f);
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (1.0f, -1.0f, 1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (1.0f, 1.0f, 1.0f);
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (-1.0f, 1.0f, 1.0f);
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// Back Face
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (-1.0f, -1.0f, -1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (-1.0f, 1.0f, -1.0f);
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (1.0f, 1.0f, -1.0f);
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (1.0f, -1.0f, -1.0f);
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// Top Face
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (-1.0f, 1.0f, -1.0f);
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (-1.0f, 1.0f, 1.0f);
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (1.0f, 1.0f, 1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (1.0f, 1.0f, -1.0f);
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// Bottom Face
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (-1.0f, -1.0f, -1.0f);
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (1.0f, -1.0f, -1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (1.0f, -1.0f, 1.0f);
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (-1.0f, -1.0f, 1.0f);
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// Right face
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (1.0f, -1.0f, -1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (1.0f, 1.0f, -1.0f);
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (1.0f, 1.0f, 1.0f);
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (1.0f, -1.0f, 1.0f);
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// Left Face
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glTexCoord2f (1.0f, 0.0f);
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glVertex3f (-1.0f, -1.0f, -1.0f);
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glTexCoord2f (0.0f, 0.0f);
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glVertex3f (-1.0f, -1.0f, 1.0f);
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glTexCoord2f (0.0f, 1.0f);
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glVertex3f (-1.0f, 1.0f, 1.0f);
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glTexCoord2f (1.0f, 1.0f);
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glVertex3f (-1.0f, 1.0f, -1.0f);
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glEnd ();
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xrot += 0.3f;
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yrot += 0.2f;
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zrot += 0.4f;
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glBindTexture (GL_TEXTURE_2D, 0);
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gst_video_frame_unmap (&v_frame);
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}
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2014-04-29 06:38:55 +00:00
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}
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void
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2014-09-28 14:23:57 +00:00
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QGLRenderer::closeEvent (QCloseEvent * event)
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2014-04-29 06:38:55 +00:00
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{
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2014-09-28 14:23:57 +00:00
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if (this->closing == false) {
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this->closing = true;
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emit closeRequested ();
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event->ignore ();
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}
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2014-04-29 06:38:55 +00:00
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}
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