--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2015 Julien Isorce <julien.isorce@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <GL/gl.h>
+#include "SDL/SDL.h"
+#include "SDL/SDL_opengl.h"
+
+#ifndef WIN32
+#include <GL/glx.h>
+#include "SDL/SDL_syswm.h"
+#include <gst/gl/x11/gstgldisplay_x11.h>
+#endif
+
+#include <gst/gst.h>
+#include <gst/gl/gl.h>
+
+static GstGLContext *sdl_context;
+static GstGLDisplay *sdl_gl_display;
+
+/* rotation angle for the triangle. */
+float rtri = 0.0f;
+
+/* rotation angle for the quadrilateral. */
+float rquad = 0.0f;
+
+/* A general OpenGL initialization function. Sets all of the initial parameters. */
+static void
+InitGL (int Width, int Height) // We call this right after our OpenGL window is created.
+{
+ glViewport (0, 0, Width, Height);
+ glClearColor (0.0f, 0.0f, 0.0f, 0.0f); // This Will Clear The Background Color To Black
+ glClearDepth (1.0); // Enables Clearing Of The Depth Buffer
+ glDepthFunc (GL_LESS); // The Type Of Depth Test To Do
+ glEnable (GL_DEPTH_TEST); // Enables Depth Testing
+ glShadeModel (GL_SMOOTH); // Enables Smooth Color Shading
+
+ glMatrixMode (GL_PROJECTION);
+ glLoadIdentity (); // Reset The Projection Matrix
+
+ glMatrixMode (GL_MODELVIEW);
+}
+
+/* The main drawing function. */
+static void
+DrawGLScene (GstSample * sample)
+{
+ GstVideoFrame v_frame;
+ GstVideoInfo v_info;
+ guint texture = 0;
+ GstBuffer *buf = gst_sample_get_buffer (sample);
+ GstCaps *caps = gst_sample_get_caps (sample);
+
+#ifdef WIN32
+ if (!wglGetCurrentContext ())
+ return;
+#else
+ if (!glXGetCurrentContext ())
+ return;
+#endif
+
+ gst_video_info_from_caps (&v_info, caps);
+
+ if (!gst_video_frame_map (&v_frame, &v_info, buf, GST_MAP_READ | GST_MAP_GL)) {
+ g_warning ("Failed to map the video buffer");
+ return;
+ }
+
+ texture = *(guint *) v_frame.data[0];
+
+ glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
+ glLoadIdentity (); // Reset The View
+
+ glTranslatef (-0.4f, 0.0f, 0.0f); // Move Left 1.5 Units And Into The Screen 6.0
+
+ glRotatef (rtri, 0.0f, 1.0f, 0.0f); // Rotate The Triangle On The Y axis
+ // draw a triangle (in smooth coloring mode)
+ glBegin (GL_POLYGON); // start drawing a polygon
+ glColor3f (1.0f, 0.0f, 0.0f); // Set The Color To Red
+ glVertex3f (0.0f, 0.4f, 0.0f); // Top
+ glColor3f (0.0f, 1.0f, 0.0f); // Set The Color To Green
+ glVertex3f (0.4f, -0.4f, 0.0f); // Bottom Right
+ glColor3f (0.0f, 0.0f, 1.0f); // Set The Color To Blue
+ glVertex3f (-0.4f, -0.4f, 0.0f); // Bottom Left
+ glEnd (); // we're done with the polygon (smooth color interpolation)
+
+ glEnable (GL_TEXTURE_2D);
+ glBindTexture (GL_TEXTURE_2D, texture);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+ glLoadIdentity (); // make sure we're no longer rotated.
+ glTranslatef (0.5f, 0.0f, 0.0f); // Move Right 3 Units, and back into the screen 6.0
+
+ glRotatef (rquad, 1.0f, 0.0f, 0.0f); // Rotate The Quad On The X axis
+ // draw a square (quadrilateral)
+ glColor3f (0.4f, 0.4f, 1.0f); // set color to a blue shade.
+ glBegin (GL_QUADS); // start drawing a polygon (4 sided)
+ glTexCoord3f (0.0f, 1.0f, 0.0f);
+ glVertex3f (-0.4f, 0.4f, 0.0f); // Top Left
+ glTexCoord3f (1.0f, 1.0f, 0.0f);
+ glVertex3f (0.4f, 0.4f, 0.0f); // Top Right
+ glTexCoord3f (1.0f, 0.0f, 0.0f);
+ glVertex3f (0.4f, -0.4f, 0.0f); // Bottom Right
+ glTexCoord3f (0.0f, 0.0f, 0.0f);
+ glVertex3f (-0.4f, -0.4f, 0.0f); // Bottom Left
+ glEnd (); // done with the polygon
+
+ glBindTexture (GL_TEXTURE_2D, 0);
+
+ rtri += 1.0f; // Increase The Rotation Variable For The Triangle
+ rquad -= 1.0f; // Decrease The Rotation Variable For The Quad
+
+ // swap buffers to display, since we're double buffered.
+ SDL_GL_SwapBuffers ();
+
+ gst_video_frame_unmap (&v_frame);
+}
+
+static gboolean
+update_sdl_scene (gpointer data)
+{
+ GstElement *pipeline = (GstElement *) data;
+ SDL_Event event;
+
+ while (SDL_PollEvent (&event)) {
+ if (event.type == SDL_QUIT) {
+ gst_element_send_event (GST_ELEMENT (pipeline), gst_event_new_eos ());
+ return FALSE;
+ }
+ if (event.type == SDL_KEYDOWN) {
+ if (event.key.keysym.sym == SDLK_ESCAPE) {
+ gst_element_send_event (GST_ELEMENT (pipeline), gst_event_new_eos ());
+ return FALSE;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static GMutex app_lock;
+static GCond app_cond;
+
+static gboolean
+executeCallback (gpointer data)
+{
+ GstSample *sample = (GstSample *) data;
+
+ g_mutex_lock (&app_lock);
+
+ DrawGLScene (sample);
+
+ g_cond_signal (&app_cond);
+ g_mutex_unlock (&app_lock);
+
+ return FALSE;
+}
+
+static gboolean
+on_client_draw (GstElement * glsink, GstGLContext * context, GstSample * sample,
+ gpointer data)
+{
+ g_mutex_lock (&app_lock);
+
+ g_idle_add_full (G_PRIORITY_HIGH, executeCallback, sample, NULL);
+ g_cond_wait (&app_cond, &app_lock);
+ g_mutex_unlock (&app_lock);
+
+ return TRUE;
+}
+
+/* gst bus signal watch callback */
+static void
+end_stream_cb (GstBus * bus, GstMessage * msg, GMainLoop * loop)
+{
+ switch (GST_MESSAGE_TYPE (msg)) {
+
+ case GST_MESSAGE_EOS:
+ g_print ("End-of-stream\n");
+ break;
+
+ case GST_MESSAGE_ERROR:
+ {
+ gchar *debug = NULL;
+ GError *err = NULL;
+
+ gst_message_parse_error (msg, &err, &debug);
+
+ g_print ("Error: %s\n", err->message);
+ g_error_free (err);
+
+ if (debug) {
+ g_print ("Debug deails: %s\n", debug);
+ g_free (debug);
+ }
+
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ g_main_loop_quit (loop);
+}
+
+static gboolean
+sync_bus_call (GstBus * bus, GstMessage * msg, gpointer data)
+{
+ switch (GST_MESSAGE_TYPE (msg)) {
+ case GST_MESSAGE_NEED_CONTEXT:
+ {
+ const gchar *context_type;
+
+ gst_message_parse_context_type (msg, &context_type);
+ g_print ("got need context %s\n", context_type);
+
+ if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
+ GstContext *display_context =
+ gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
+ gst_context_set_gl_display (display_context, sdl_gl_display);
+ gst_element_set_context (GST_ELEMENT (msg->src), display_context);
+ return TRUE;
+ } else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
+ GstContext *app_context = gst_context_new ("gst.gl.app_context", TRUE);
+ GstStructure *s = gst_context_writable_structure (app_context);
+ gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, sdl_context,
+ NULL);
+ gst_element_set_context (GST_ELEMENT (msg->src), app_context);
+ return TRUE;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+ return FALSE;
+}
+
+int
+main (int argc, char **argv)
+{
+#ifdef WIN32
+ HGLRC sdl_gl_context = 0;
+ HDC sdl_dc = 0;
+#else
+ SDL_SysWMinfo info;
+ Display *sdl_display = NULL;
+ Window sdl_win = 0;
+ GLXContext sdl_gl_context = NULL;
+#endif
+
+ GMainLoop *loop = NULL;
+ GstPipeline *pipeline = NULL;
+ GstBus *bus = NULL;
+ GstElement *glimagesink = NULL;
+ const gchar *platform;
+
+ /* Initialize SDL for video output */
+ if (SDL_Init (SDL_INIT_VIDEO) < 0) {
+ fprintf (stderr, "Unable to initialize SDL: %s\n", SDL_GetError ());
+ return -1;
+ }
+
+ /* Create a 640x480 OpenGL screen */
+ if (SDL_SetVideoMode (640, 480, 0, SDL_OPENGL) == NULL) {
+ fprintf (stderr, "Unable to create OpenGL screen: %s\n", SDL_GetError ());
+ SDL_Quit ();
+ return -1;
+ }
+
+ /* Set the title bar in environments that support it */
+ SDL_WM_SetCaption ("SDL and gst-plugins-gl", NULL);
+
+
+ /* Loop, drawing and checking events */
+ InitGL (640, 480);
+
+ gst_init (&argc, &argv);
+ loop = g_main_loop_new (NULL, FALSE);
+
+ /* retrieve and turn off sdl opengl context */
+#ifdef WIN32
+ sdl_gl_context = wglGetCurrentContext ();
+ sdl_dc = wglGetCurrentDC ();
+ wglMakeCurrent (0, 0);
+ platform = "wgl";
+ sdl_gl_display = gst_gl_display_new ();
+#else
+ SDL_VERSION (&info.version);
+ SDL_GetWMInfo (&info);
+ /* FIXME: This display is different to the one that SDL uses to create the
+ * GL context inside SDL_SetVideoMode() above which fails on Intel hardware
+ */
+ sdl_display = info.info.x11.gfxdisplay;
+ sdl_win = info.info.x11.window;
+ sdl_gl_context = glXGetCurrentContext ();
+ glXMakeCurrent (sdl_display, None, 0);
+ platform = "glx";
+ sdl_gl_display =
+ (GstGLDisplay *) gst_gl_display_x11_new_with_display (sdl_display);
+#endif
+
+ sdl_context =
+ gst_gl_context_new_wrapped (sdl_gl_display, (guintptr) sdl_gl_context,
+ gst_gl_platform_from_string (platform), GST_GL_API_OPENGL);
+
+ pipeline =
+ GST_PIPELINE (gst_parse_launch
+ ("videotestsrc ! video/x-raw, width=320, height=240, framerate=(fraction)30/1 ! "
+ "glimagesink name=glimagesink0", NULL));
+
+ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
+ gst_bus_add_signal_watch (bus);
+ g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb), loop);
+ g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb), loop);
+ g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), loop);
+ gst_bus_enable_sync_message_emission (bus);
+ g_signal_connect (bus, "sync-message", G_CALLBACK (sync_bus_call), NULL);
+ gst_object_unref (bus);
+
+ glimagesink = gst_bin_get_by_name (GST_BIN (pipeline), "glimagesink0");
+ g_signal_connect (G_OBJECT (glimagesink), "client-draw",
+ G_CALLBACK (on_client_draw), NULL);
+ gst_object_unref (glimagesink);
+
+ /* NULL to PAUSED state pipeline to make sure the gst opengl context is created and
+ * shared with the sdl one */
+ gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PAUSED);
+
+ /* turn on back sdl opengl context */
+#ifdef WIN32
+ wglMakeCurrent (sdl_dc, sdl_gl_context);
+#else
+ glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
+#endif
+
+ gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+
+ g_timeout_add (100, update_sdl_scene, pipeline);
+
+ g_main_loop_run (loop);
+
+ /* before to deinitialize the gst-gl-opengl context,
+ * no shared context (here the sdl one) must be current
+ */
+#ifdef WIN32
+ wglMakeCurrent (0, 0);
+#else
+ glXMakeCurrent (sdl_display, sdl_win, sdl_gl_context);
+#endif
+
+ gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
+ gst_object_unref (pipeline);
+
+ /* turn on back sdl opengl context */
+#ifdef WIN32
+ wglMakeCurrent (sdl_dc, sdl_gl_context);
+#else
+ glXMakeCurrent (sdl_display, None, 0);
+#endif
+
+ SDL_Quit ();
+
+ return 0;
+}
projects / platform / upstream / gst-plugins-bad.git / commitdiff