mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
5da138d1ae
There's no need for the jump to an extra thread in most cases, especially when relying solely on a shader to render. We can use the provided render_to_target() functions to simplify filter writing.
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
|
|
* GStreamer
|
|
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
|
|
* Copyright (C) 2015 Michał Dębski <debski.mi.zd@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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "../gstgleffects.h"
|
|
|
|
static float *
|
|
gst_gl_effects_blur_kernel (void)
|
|
{
|
|
/* gaussian kernel (well, actually vector), size 9, standard
|
|
* deviation 3.0 */
|
|
/* FIXME: make this a runtime property */
|
|
static gfloat *kernel = NULL;
|
|
if (G_UNLIKELY (NULL == kernel)) {
|
|
/* 3x3 matrix */
|
|
kernel = g_malloc (sizeof (gfloat) * 9);
|
|
fill_gaussian_kernel (kernel, 7, 3.f);
|
|
}
|
|
return kernel;
|
|
}
|
|
|
|
void
|
|
gst_gl_effects_blur (GstGLEffects * effects)
|
|
{
|
|
GstGLFilter *filter = GST_GL_FILTER (effects);
|
|
GstGLShader *shader;
|
|
|
|
shader = gst_gl_effects_get_fragment_shader (effects, "hconv0",
|
|
hconv7_fragment_source_gles2);
|
|
gst_gl_shader_use (shader);
|
|
gst_gl_shader_set_uniform_1f (shader, "gauss_width",
|
|
GST_VIDEO_INFO_WIDTH (&filter->in_info));
|
|
gst_gl_shader_set_uniform_1fv (shader, "kernel", 7,
|
|
gst_gl_effects_blur_kernel ());
|
|
gst_gl_filter_render_to_target_with_shader (filter, effects->intexture,
|
|
effects->midtexture[0], shader);
|
|
|
|
shader = gst_gl_effects_get_fragment_shader (effects, "vconv0",
|
|
vconv7_fragment_source_gles2);
|
|
gst_gl_shader_use (shader);
|
|
gst_gl_shader_set_uniform_1f (shader, "gauss_height",
|
|
GST_VIDEO_INFO_HEIGHT (&filter->in_info));
|
|
gst_gl_shader_set_uniform_1fv (shader, "kernel", 7,
|
|
gst_gl_effects_blur_kernel ());
|
|
gst_gl_filter_render_to_target_with_shader (filter, effects->midtexture[0],
|
|
effects->outtexture, shader);
|
|
}
|