blob: fd275ec8cf2d7feb75cc1f70aae9447079ca9731 [file] [log] [blame]
/*
* GStreamer
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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.
*/
/**
* SECTION:element-glfilterblur
*
* Blur with 9x9 separable convolution.
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch videotestsrc ! glupload ! glfilterblur ! glimagesink
* ]|
* FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglfilterblur.h"
#include "effects/gstgleffectssources.h"
#define GST_CAT_DEFAULT gst_gl_filterblur_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_filterblur_debug, "glfilterblur", 0, "glfilterblur element");
G_DEFINE_TYPE_WITH_CODE (GstGLFilterBlur, gst_gl_filterblur,
GST_TYPE_GL_FILTER, DEBUG_INIT);
static void gst_gl_filterblur_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_filterblur_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_filter_filterblur_reset (GstGLFilter * filter);
static gboolean gst_gl_filterblur_init_shader (GstGLFilter * filter);
static gboolean gst_gl_filterblur_filter_texture (GstGLFilter * filter,
guint in_tex, guint out_tex);
static void gst_gl_filterblur_hcallback (gint width, gint height, guint texture,
gpointer stuff);
static void gst_gl_filterblur_vcallback (gint width, gint height, guint texture,
gpointer stuff);
static void
gst_gl_filterblur_init_resources (GstGLFilter * filter)
{
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
gl->GenTextures (1, &filterblur->midtexture);
gl->BindTexture (GL_TEXTURE_2D, filterblur->midtexture);
gl->TexImage2D (GL_TEXTURE_2D, 0, GL_RGBA8,
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
static void
gst_gl_filterblur_reset_resources (GstGLFilter * filter)
{
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
gl->DeleteTextures (1, &filterblur->midtexture);
}
static void
gst_gl_filterblur_class_init (GstGLFilterBlurClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_filterblur_set_property;
gobject_class->get_property = gst_gl_filterblur_get_property;
gst_element_class_set_metadata (element_class, "Gstreamer OpenGL Blur",
"Filter/Effect/Video", "Blur with 9x9 separable convolution",
"Filippo Argiolas <filippo.argiolas@gmail.com>");
GST_GL_FILTER_CLASS (klass)->filter_texture =
gst_gl_filterblur_filter_texture;
GST_GL_FILTER_CLASS (klass)->display_init_cb =
gst_gl_filterblur_init_resources;
GST_GL_FILTER_CLASS (klass)->display_reset_cb =
gst_gl_filterblur_reset_resources;
GST_GL_FILTER_CLASS (klass)->onInitFBO = gst_gl_filterblur_init_shader;
GST_GL_FILTER_CLASS (klass)->onReset = gst_gl_filter_filterblur_reset;
}
static void
gst_gl_filterblur_init (GstGLFilterBlur * filterblur)
{
filterblur->shader0 = NULL;
filterblur->shader1 = NULL;
filterblur->midtexture = 0;
/* gaussian kernel (well, actually vector), size 9, standard
* deviation 3.0 */
/* FIXME: eventually make this a runtime property */
fill_gaussian_kernel (filterblur->gauss_kernel, 7, 3.0);
}
static void
gst_gl_filter_filterblur_reset (GstGLFilter * filter)
{
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
//blocking call, wait the opengl thread has destroyed the shader
if (filterblur->shader0)
gst_gl_context_del_shader (filter->context, filterblur->shader0);
filterblur->shader0 = NULL;
//blocking call, wait the opengl thread has destroyed the shader
if (filterblur->shader1)
gst_gl_context_del_shader (filter->context, filterblur->shader1);
filterblur->shader1 = NULL;
}
static void
gst_gl_filterblur_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
/* GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (object); */
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_filterblur_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
/* GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (object); */
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_filterblur_init_shader (GstGLFilter * filter)
{
GstGLFilterBlur *blur_filter = GST_GL_FILTERBLUR (filter);
//blocking call, wait the opengl thread has compiled the shader
if (!gst_gl_context_gen_shader (filter->context, 0, hconv7_fragment_source,
&blur_filter->shader0))
return FALSE;
//blocking call, wait the opengl thread has compiled the shader
if (!gst_gl_context_gen_shader (filter->context, 0, vconv7_fragment_source,
&blur_filter->shader1))
return FALSE;
return TRUE;
}
static gboolean
gst_gl_filterblur_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
gst_gl_filter_render_to_target (filter, TRUE, in_tex,
filterblur->midtexture, gst_gl_filterblur_hcallback, filterblur);
gst_gl_filter_render_to_target (filter, FALSE, filterblur->midtexture,
out_tex, gst_gl_filterblur_vcallback, filterblur);
return TRUE;
}
static void
gst_gl_filterblur_hcallback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (filterblur->shader0);
gl->ActiveTexture (GL_TEXTURE1);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (filterblur->shader0, "tex", 1);
gst_gl_shader_set_uniform_1fv (filterblur->shader0, "kernel", 7,
filterblur->gauss_kernel);
gst_gl_shader_set_uniform_1f (filterblur->shader0, "width", width);
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
gst_gl_filterblur_vcallback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
GstGLFilterBlur *filterblur = GST_GL_FILTERBLUR (filter);
GstGLFuncs *gl = filter->context->gl_vtable;
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
gst_gl_shader_use (filterblur->shader1);
gl->ActiveTexture (GL_TEXTURE1);
gl->Enable (GL_TEXTURE_2D);
gl->BindTexture (GL_TEXTURE_2D, texture);
gl->Disable (GL_TEXTURE_2D);
gst_gl_shader_set_uniform_1i (filterblur->shader1, "tex", 1);
gst_gl_shader_set_uniform_1fv (filterblur->shader1, "kernel", 7,
filterblur->gauss_kernel);
gst_gl_shader_set_uniform_1f (filterblur->shader1, "height", height);
gst_gl_filter_draw_texture (filter, texture, width, height);
}