mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-12 19:36:38 +00:00
267 lines
8.6 KiB
C++
267 lines
8.6 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2008-2009 Julien Isorce <julien.isorce@gmail.com>
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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 <gst/gst.h>
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#include <gst/gl/gl.h>
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#include <gst/gl/gstglfuncs.h>
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#include <iostream>
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#include <string>
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static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data)
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{
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GMainLoop *loop = (GMainLoop*)data;
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switch (GST_MESSAGE_TYPE (msg))
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{
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case GST_MESSAGE_EOS:
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g_print ("End-of-stream\n");
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g_main_loop_quit (loop);
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break;
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case GST_MESSAGE_ERROR:
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{
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gchar *debug = NULL;
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GError *err = NULL;
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gst_message_parse_error (msg, &err, &debug);
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g_print ("Error: %s\n", err->message);
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g_error_free (err);
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if (debug)
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{
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g_print ("Debug deails: %s\n", debug);
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g_free (debug);
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}
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g_main_loop_quit (loop);
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break;
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}
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default:
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break;
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}
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return TRUE;
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}
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//client reshape callback
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static gboolean reshapeCallback (void *gl_sink, void *context, GLuint width, GLuint height, gpointer data)
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{
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glViewport(0, 0, width, height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glMatrixMode(GL_MODELVIEW);
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return TRUE;
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}
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//client draw callback
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static gboolean drawCallback (GstElement * gl_sink, GstGLContext *context, GstSample * sample, gpointer data)
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{
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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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static GstClockTime current_time;
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static GstClockTime last_time = gst_util_get_timestamp();
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static gint nbFrames = 0;
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GstVideoFrame v_frame;
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GstVideoInfo v_info;
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guint texture = 0;
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GstBuffer *buf = gst_sample_get_buffer (sample);
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GstCaps *caps = gst_sample_get_caps (sample);
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gst_video_info_from_caps (&v_info, caps);
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if (!gst_video_frame_map (&v_frame, &v_info, buf, (GstMapFlags) (GST_MAP_READ | GST_MAP_GL))) {
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g_warning ("Failed to map the video buffer");
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return TRUE;
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}
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texture = *(guint *) v_frame.data[0];
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current_time = gst_util_get_timestamp ();
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nbFrames++ ;
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if ((current_time - last_time) >= GST_SECOND)
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{
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std::cout << "GRAPHIC FPS = " << nbFrames << std::endl;
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nbFrames = 0;
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last_time = current_time;
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}
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glEnable(GL_DEPTH_TEST);
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glEnable (GL_TEXTURE_2D);
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glBindTexture (GL_TEXTURE_2D, texture);
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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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/* invert the y-axis to get the front face the correct way up */
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glScalef (0.5f, -0.5f, 0.5f);
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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); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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// Back Face
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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// Top Face
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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// Bottom Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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// Right face
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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// Left Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glEnd();
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gst_video_frame_unmap (&v_frame);
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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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glDisable (GL_DEPTH_TEST);
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glDisable (GL_TEXTURE_2D);
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return TRUE;
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}
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//gst-launch-1.0 videotestsrc num_buffers=400 ! video/x-raw, width=320, height=240 !
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//glgraphicmaker ! glfiltercube ! video/x-raw, width=800, height=600 ! glimagesink
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gint main (gint argc, gchar *argv[])
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{
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GstStateChangeReturn ret;
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GstElement *pipeline, *videosrc, *glimagesink;
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GMainLoop *loop;
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GstBus *bus;
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/* FIXME: remove once the example supports gl3 and/or gles2 */
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g_setenv ("GST_GL_API", "opengl", FALSE);
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/* initialization */
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gst_init (&argc, &argv);
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loop = g_main_loop_new (NULL, FALSE);
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/* create elements */
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pipeline = gst_pipeline_new ("pipeline");
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/* watch for messages on the pipeline's bus (note that this will only
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* work like this when a GLib main loop is running) */
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_bus_add_watch (bus, bus_call, loop);
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gst_object_unref (bus);
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/* create elements */
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videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc0");
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glimagesink = gst_element_factory_make ("glimagesink", "glimagesink0");
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if (!videosrc || !glimagesink)
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{
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g_print ("one element could not be found \n");
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return -1;
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}
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/* change video source caps */
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GstCaps *caps = gst_caps_new_simple("video/x-raw",
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"format", G_TYPE_STRING, "RGB",
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"width", G_TYPE_INT, 320,
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"height", G_TYPE_INT, 240,
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"framerate", GST_TYPE_FRACTION, 25, 1,
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NULL) ;
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/* configure elements */
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g_object_set(G_OBJECT(videosrc), "num-buffers", 400, NULL);
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g_signal_connect(G_OBJECT(glimagesink), "client-reshape", G_CALLBACK (reshapeCallback), NULL);
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g_signal_connect(G_OBJECT(glimagesink), "client-draw", G_CALLBACK (drawCallback), NULL);
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/* add elements */
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gst_bin_add_many (GST_BIN (pipeline), videosrc, glimagesink, NULL);
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/* link elements */
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gboolean link_ok = gst_element_link_filtered(videosrc, glimagesink, caps) ;
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gst_caps_unref(caps) ;
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if(!link_ok)
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{
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g_warning("Failed to link videosrc to glimagesink!\n") ;
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return -1 ;
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}
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/* run */
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ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE)
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{
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g_print ("Failed to start up pipeline!\n");
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/* check if there is an error message with details on the bus */
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GstMessage* msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
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if (msg)
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{
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GError *err = NULL;
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gst_message_parse_error (msg, &err, NULL);
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g_print ("ERROR: %s\n", err->message);
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g_error_free (err);
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gst_message_unref (msg);
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}
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return -1;
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}
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g_main_loop_run (loop);
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/* clean up */
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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}
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