/*
* GStreamer
* Copyright (C) 2008-2009 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.
*/
#include <gst/gst.h>
#include <gst/gl/gl.h>
#include <gst/gl/gstglfuncs.h>
#include <iostream>
#include <string>
static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data)
{
GMainLoop *loop = (GMainLoop*)data;
switch (GST_MESSAGE_TYPE (msg))
{
case GST_MESSAGE_EOS:
g_print ("End-of-stream\n");
g_main_loop_quit (loop);
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);
}
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
//client reshape callback
static gboolean reshapeCallback (void *gl_sink, void *context, GLuint width, GLuint height, gpointer data)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
return TRUE;
}
//client draw callback
static gboolean drawCallback (GstElement * gl_sink, GstGLContext *context, GstSample * sample, gpointer data)
{
static GLfloat xrot = 0;
static GLfloat yrot = 0;
static GLfloat zrot = 0;
static GTimeVal current_time;
static glong last_sec = current_time.tv_sec;
static gint nbFrames = 0;
GstVideoFrame v_frame;
GstVideoInfo v_info;
guint texture = 0;
GstBuffer *buf = gst_sample_get_buffer (sample);
GstCaps *caps = gst_sample_get_caps (sample);
gst_video_info_from_caps (&v_info, caps);
if (!gst_video_frame_map (&v_frame, &v_info, buf, (GstMapFlags) (GST_MAP_READ | GST_MAP_GL))) {
g_warning ("Failed to map the video buffer");
return TRUE;
}
texture = *(guint *) v_frame.data[0];
g_get_current_time (¤t_time);
nbFrames++ ;
if ((current_time.tv_sec - last_sec) >= 1)
{
std::cout << "GRPHIC FPS = " << nbFrames << std::endl;
nbFrames = 0;
last_sec = current_time.tv_sec;
}
glEnable(GL_DEPTH_TEST);
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);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* invert the y-axis to get the front face the correct way up */
glScalef (0.5f, -0.5f, 0.5f);
glRotatef(xrot,1.0f,0.0f,0.0f);
glRotatef(yrot,0.0f,1.0f,0.0f);
glRotatef(zrot,0.0f,0.0f,1.0f);
glBegin(GL_QUADS);
// Front Face
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
// Back Face
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
// Top Face
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
// Bottom Face
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
// Right face
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
// Left Face
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glEnd();
gst_video_frame_unmap (&v_frame);
xrot+=0.3f;
yrot+=0.2f;
zrot+=0.4f;
glDisable (GL_DEPTH_TEST);
glDisable (GL_TEXTURE_2D);
return TRUE;
}
//gst-launch-1.0 videotestsrc num_buffers=400 ! video/x-raw, width=320, height=240 !
//glgraphicmaker ! glfiltercube ! video/x-raw, width=800, height=600 ! glimagesink
gint main (gint argc, gchar *argv[])
{
GstStateChangeReturn ret;
GstElement *pipeline, *videosrc, *glimagesink;
GMainLoop *loop;
GstBus *bus;
/* FIXME: remove once the example supports gl3 and/or gles2 */
g_setenv ("GST_GL_API", "opengl", FALSE);
/* initialization */
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* create elements */
pipeline = gst_pipeline_new ("pipeline");
/* watch for messages on the pipeline's bus (note that this will only
* work like this when a GLib main loop is running) */
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
/* create elements */
videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc0");
glimagesink = gst_element_factory_make ("glimagesink", "glimagesink0");
if (!videosrc || !glimagesink)
{
g_print ("one element could not be found \n");
return -1;
}
/* change video source caps */
GstCaps *caps = gst_caps_new_simple("video/x-raw",
"format", G_TYPE_STRING, "RGB",
"width", G_TYPE_INT, 320,
"height", G_TYPE_INT, 240,
"framerate", GST_TYPE_FRACTION, 25, 1,
NULL) ;
/* configure elements */
g_object_set(G_OBJECT(videosrc), "num-buffers", 400, NULL);
g_signal_connect(G_OBJECT(glimagesink), "client-reshape", G_CALLBACK (reshapeCallback), NULL);
g_signal_connect(G_OBJECT(glimagesink), "client-draw", G_CALLBACK (drawCallback), NULL);
/* add elements */
gst_bin_add_many (GST_BIN (pipeline), videosrc, glimagesink, NULL);
/* link elements */
gboolean link_ok = gst_element_link_filtered(videosrc, glimagesink, caps) ;
gst_caps_unref(caps) ;
if(!link_ok)
{
g_warning("Failed to link videosrc to glimagesink!\n") ;
return -1 ;
}
/* run */
ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE)
{
g_print ("Failed to start up pipeline!\n");
/* check if there is an error message with details on the bus */
GstMessage* msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
if (msg)
{
GError *err = NULL;
gst_message_parse_error (msg, &err, NULL);
g_print ("ERROR: %s\n", err->message);
g_error_free (err);
gst_message_unref (msg);
}
return -1;
}
g_main_loop_run (loop);
/* clean up */
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
return 0;
}