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321 lines
10 KiB
C
321 lines
10 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-glfiltercube
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*
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* The resize and redraw callbacks can be set from a client code.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfiltercube ! glimagesink
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* ]| A pipeline to mpa textures on the 6 cube faces..
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* FBO is required.
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* |[
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* gst-launch -v videotestsrc ! glupload ! glfiltercube ! video/x-raw-gl, width=640, height=480 ! glimagesink
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* ]| Resize scene after drawing the cube.
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* The scene size is greater than the input video size.
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|[
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* gst-launch -v videotestsrc ! glupload ! video/x-raw-gl, width=640, height=480 ! glfiltercube ! glimagesink
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* ]| Resize scene before drawing the cube.
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* The scene size is greater than the input video size.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstglfiltercube.h"
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#define GST_CAT_DEFAULT gst_gl_filter_cube_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static const GstElementDetails element_details =
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GST_ELEMENT_DETAILS ("OpenGL cube filter",
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"Filter/Effect",
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"Map input texture on the 6 cube faces",
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"Julien Isorce <julien.isorce@gmail.com>");
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enum
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{
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PROP_0,
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PROP_RED,
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PROP_GREEN,
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PROP_BLUE,
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PROP_FOVY,
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PROP_ASPECT,
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PROP_ZNEAR,
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PROP_ZFAR
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};
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#define DEBUG_INIT(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_gl_filter_cube_debug, "glfiltercube", 0, "glfiltercube element");
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GST_BOILERPLATE_FULL (GstGLFilterCube, gst_gl_filter_cube, GstGLFilter,
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GST_TYPE_GL_FILTER, DEBUG_INIT);
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static void gst_gl_filter_cube_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_cube_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_gl_filter_cube_set_caps (GstGLFilter * filter,
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GstCaps * incaps, GstCaps * outcaps);
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static gboolean gst_gl_filter_cube_filter (GstGLFilter * filter,
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GstGLBuffer * inbuf, GstGLBuffer * outbuf);
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static void gst_gl_filter_cube_callback (gint width, gint height, guint texture,
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gpointer stuff);
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static void
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gst_gl_filter_cube_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_set_details (element_class, &element_details);
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}
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static void
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gst_gl_filter_cube_class_init (GstGLFilterCubeClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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gobject_class->set_property = gst_gl_filter_cube_set_property;
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gobject_class->get_property = gst_gl_filter_cube_get_property;
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GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_filter_cube_set_caps;
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GST_GL_FILTER_CLASS (klass)->filter = gst_gl_filter_cube_filter;
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g_object_class_install_property (gobject_class, PROP_RED,
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g_param_spec_float ("red", "Red", "Background red color",
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0.0f, 1.0f, 0.0f, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_GREEN,
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g_param_spec_float ("green", "Green", "Background reen color",
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0.0f, 1.0f, 0.0f, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_BLUE,
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g_param_spec_float ("blue", "Blue", "Background blue color",
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0.0f, 1.0f, 0.0f, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_FOVY,
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g_param_spec_double ("fovy", "Fovy", "Field of view angle in degrees",
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0.0, 180.0, 45.0, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_ASPECT,
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g_param_spec_double ("aspect", "Aspect",
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"Field of view in the x direction", 0.0, 100, 0.0, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_ZNEAR,
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g_param_spec_double ("znear", "Znear",
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"Specifies the distance from the viewer to the near clipping plane",
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0.0, 100.0, 0.1, G_PARAM_WRITABLE));
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g_object_class_install_property (gobject_class, PROP_ZFAR,
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g_param_spec_double ("zfar", "Zfar",
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"Specifies the distance from the viewer to the far clipping plane",
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0.0, 1000.0, 100.0, G_PARAM_WRITABLE));
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}
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static void
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gst_gl_filter_cube_init (GstGLFilterCube * filter, GstGLFilterCubeClass * klass)
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{
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filter->fovy = 45;
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filter->aspect = 0;
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filter->znear = 0.1;
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filter->zfar = 100;
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}
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static void
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gst_gl_filter_cube_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGLFilterCube *filter = GST_GL_FILTER_CUBE (object);
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switch (prop_id) {
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case PROP_RED:
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filter->red = g_value_get_float (value);
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break;
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case PROP_GREEN:
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filter->green = g_value_get_float (value);
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break;
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case PROP_BLUE:
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filter->blue = g_value_get_float (value);
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break;
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case PROP_FOVY:
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filter->fovy = g_value_get_double (value);
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break;
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case PROP_ASPECT:
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filter->aspect = g_value_get_double (value);
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break;
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case PROP_ZNEAR:
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filter->znear = g_value_get_double (value);
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break;
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case PROP_ZFAR:
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filter->zfar = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gl_filter_cube_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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//GstGLFilterCube* filter = GST_GL_FILTER_CUBE (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_gl_filter_cube_set_caps (GstGLFilter * filter, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstGLFilterCube *cube_filter = GST_GL_FILTER_CUBE (filter);
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if (cube_filter->aspect == 0)
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cube_filter->aspect = (gdouble) filter->width / (gdouble) filter->height;
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return TRUE;
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}
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static gboolean
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gst_gl_filter_cube_filter (GstGLFilter * filter, GstGLBuffer * inbuf,
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GstGLBuffer * outbuf)
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{
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GstGLFilterCube *cube_filter = GST_GL_FILTER_CUBE (filter);
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//blocking call, use a FBO
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gst_gl_display_use_fbo (filter->display, filter->width, filter->height,
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filter->fbo, filter->depthbuffer, outbuf->texture,
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gst_gl_filter_cube_callback, inbuf->width, inbuf->height, inbuf->texture,
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cube_filter->fovy, cube_filter->aspect, cube_filter->znear,
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cube_filter->zfar, GST_GL_DISPLAY_PROJECTION_PERSPECIVE,
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(gpointer) cube_filter);
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return TRUE;
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}
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//opengl scene, params: input texture (not the output filter->texture)
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static void
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gst_gl_filter_cube_callback (gint width, gint height, guint texture,
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gpointer stuff)
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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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GstGLFilterCube *cube_filter = GST_GL_FILTER_CUBE (stuff);
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glEnable (GL_DEPTH_TEST);
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glEnable (GL_TEXTURE_RECTANGLE_ARB);
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glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
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glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
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GL_CLAMP_TO_EDGE);
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glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
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GL_CLAMP_TO_EDGE);
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glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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glClearColor (cube_filter->red, cube_filter->green, cube_filter->blue, 0.0);
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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);
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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, (gfloat) height);
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glVertex3f (1.0f, 1.0f, 1.0f);
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glTexCoord2f ((gfloat) width, (gfloat) height);
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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, (gfloat) height);
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glVertex3f (-1.0f, 1.0f, -1.0f);
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glTexCoord2f ((gfloat) width, (gfloat) height);
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glVertex3f (1.0f, 1.0f, -1.0f);
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glTexCoord2f ((gfloat) width, 0.0f);
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glVertex3f (1.0f, -1.0f, -1.0f);
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// Top Face
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glTexCoord2f ((gfloat) width, (gfloat) height);
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glVertex3f (-1.0f, 1.0f, -1.0f);
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glTexCoord2f ((gfloat) width, 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, (gfloat) height);
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glVertex3f (1.0f, 1.0f, -1.0f);
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// Bottom Face
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glTexCoord2f ((gfloat) width, 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, (gfloat) height);
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glVertex3f (1.0f, -1.0f, 1.0f);
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glTexCoord2f ((gfloat) width, (gfloat) height);
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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, (gfloat) height);
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glVertex3f (1.0f, 1.0f, -1.0f);
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glTexCoord2f ((gfloat) width, (gfloat) height);
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glVertex3f (1.0f, 1.0f, 1.0f);
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glTexCoord2f ((gfloat) width, 0.0f);
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glVertex3f (1.0f, -1.0f, 1.0f);
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// Left Face
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glTexCoord2f ((gfloat) width, 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, (gfloat) height);
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glVertex3f (-1.0f, 1.0f, 1.0f);
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glTexCoord2f ((gfloat) width, (gfloat) height);
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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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glDisable (GL_DEPTH_TEST);
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}
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