mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 00:36:51 +00:00
322 lines
11 KiB
C++
322 lines
11 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 <GL/gl.h>
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#include <GL/glu.h>
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#if __WIN32__ || _WIN32
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# include <GL/glext.h>
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#endif
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#include <gst/gst.h>
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#include <iostream>
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#include <sstream>
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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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//display video framerate
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static void identityCallback (GstElement *src, GstBuffer *buffer, GstElement* textoverlay)
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{
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static GstClockTime last_timestamp = 0;
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static gint nbFrames = 0 ;
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//display estimated video FPS
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nbFrames++ ;
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if (GST_BUFFER_TIMESTAMP(buffer) - last_timestamp >= 1000000000)
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{
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std::ostringstream oss ;
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oss << "video framerate = " << nbFrames ;
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std::string s(oss.str()) ;
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g_object_set(G_OBJECT(textoverlay), "text", s.c_str(), NULL);
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last_timestamp = GST_BUFFER_TIMESTAMP(buffer) ;
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nbFrames = 0 ;
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}
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}
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//client reshape callback
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static void reshapeCallback (GLuint width, GLuint height)
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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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gluPerspective(45, (gfloat)width/(gfloat)height, 0.1, 100);
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glMatrixMode(GL_MODELVIEW);
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}
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//client draw callback
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static gboolean drawCallback (GLuint texture, GLuint width, GLuint height)
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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 GTimeVal current_time;
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static glong last_sec = current_time.tv_sec;
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static gint nbFrames = 0;
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g_get_current_time (¤t_time);
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nbFrames++ ;
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if ((current_time.tv_sec - last_sec) >= 1)
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{
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std::cout << "GRPHIC FPS = " << nbFrames << std::endl;
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nbFrames = 0;
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last_sec = current_time.tv_sec;
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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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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((gfloat)width, 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, (gfloat)height); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f((gfloat)width, (gfloat)height); 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, (gfloat)height); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f((gfloat)width, (gfloat)height); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f((gfloat)width, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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// Top Face
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glTexCoord2f((gfloat)width, (gfloat)height); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f((gfloat)width, 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, (gfloat)height); glVertex3f( 1.0f, 1.0f, -1.0f);
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// Bottom Face
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glTexCoord2f((gfloat)width, 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, (gfloat)height); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f((gfloat)width,(gfloat)height); 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, (gfloat)height); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f((gfloat)width, (gfloat)height); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f((gfloat)width, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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// Left Face
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glTexCoord2f((gfloat)width, 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, (gfloat)height); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f((gfloat)width, (gfloat)height); glVertex3f(-1.0f, 1.0f, -1.0f);
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glEnd();
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xrot+=0.03f;
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yrot+=0.02f;
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zrot+=0.04f;
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//return TRUE causes a postRedisplay
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//so you have to return FALSE to synchronise to have a graphic FPS
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//equals to the input video frame rate
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//Usually, we will not always return TRUE (or FALSE)
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//For example, if you want a fixed graphic FPS equals to 60
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//then you have to use the timeclock to return TRUE or FALSE
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//in order to increase or decrease the FPS in real time
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//to reach the 60.
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return TRUE;
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}
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static void cb_new_pad (GstElement* decodebin, GstPad* pad, GstElement* identity)
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{
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GstPad* identity_pad = gst_element_get_static_pad (identity, "sink");
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//only link once
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if (GST_PAD_IS_LINKED (identity_pad))
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{
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gst_object_unref (identity_pad);
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return;
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}
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GstCaps* caps = gst_pad_get_current_caps (pad);
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GstStructure* str = gst_caps_get_structure (caps, 0);
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if (!g_strrstr (gst_structure_get_name (str), "video"))
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{
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gst_caps_unref (caps);
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gst_object_unref (identity_pad);
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return;
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}
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gst_caps_unref (caps);
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GstPadLinkReturn ret = gst_pad_link (pad, identity_pad);
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if (ret != GST_PAD_LINK_OK)
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g_warning ("Failed to link with decodebin!\n");
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}
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gint main (gint argc, gchar *argv[])
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{
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if (argc != 2)
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{
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g_warning ("usage: cubeyuv.exe videolocation\n");
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return -1;
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}
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std::string video_location(argv[1]);
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/* initialization */
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gst_init (&argc, &argv);
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GMainLoop* loop = g_main_loop_new (NULL, FALSE);
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/* create elements */
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GstElement* 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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GstBus* 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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GstElement* videosrc = gst_element_factory_make ("filesrc", "filesrc0");
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GstElement* decodebin = gst_element_factory_make ("decodebin", "decodebin");
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GstElement* identity = gst_element_factory_make ("identity", "identity0");
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GstElement* textoverlay = gst_element_factory_make ("textoverlay", "textoverlay0");
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GstElement* glcolorscale = gst_element_factory_make ("glcolorscale", "glcolorscale0");
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GstElement* glimagesink = gst_element_factory_make ("glimagesink", "glimagesink0");
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if (!videosrc || !decodebin || !identity || !textoverlay ||
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!glcolorscale || !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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GstCaps *outcaps = gst_caps_new_simple("video/x-raw",
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"width", G_TYPE_INT, 640,
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"height", G_TYPE_INT, 480,
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NULL);
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/* configure elements */
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g_object_set(G_OBJECT(videosrc), "num-buffers", 800, NULL);
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g_object_set(G_OBJECT(videosrc), "location", video_location.c_str(), NULL);
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g_signal_connect(identity, "handoff", G_CALLBACK(identityCallback), textoverlay) ;
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g_object_set(G_OBJECT(textoverlay), "font_desc", "Ahafoni CLM Bold 30", NULL);
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g_object_set(G_OBJECT(glimagesink), "client-reshape-callback", reshapeCallback, NULL);
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g_object_set(G_OBJECT(glimagesink), "client-draw-callback", drawCallback, NULL);
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/* add elements */
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gst_bin_add_many (GST_BIN (pipeline), videosrc, decodebin, identity,
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textoverlay, glcolorscale, glimagesink, NULL);
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/* link elements */
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gst_element_link_pads (videosrc, "src", decodebin, "sink");
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g_signal_connect (decodebin, "pad-added", G_CALLBACK (cb_new_pad), identity);
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if (!gst_element_link_pads(identity, "src", textoverlay, "video_sink"))
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{
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g_print ("Failed to link identity to textoverlay!\n");
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return -1;
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}
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gst_element_link (textoverlay, glcolorscale);
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gboolean link_ok = gst_element_link_filtered(glcolorscale, glimagesink, outcaps) ;
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gst_caps_unref(outcaps) ;
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if(!link_ok)
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{
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g_warning("Failed to link textoverlay to glimagesink!\n") ;
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return -1 ;
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}
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/* run */
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GstStateChangeReturn 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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