mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-19 16:21:17 +00:00
gleffects: Merge laplacian filter into effects
https://bugzilla.gnome.org/show_bug.cgi?id=746209
This commit is contained in:
parent
0165b163db
commit
532f332c2f
9 changed files with 149 additions and 287 deletions
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@ -30,6 +30,7 @@ libgstopengl_la_SOURCES = \
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effects/gstgleffectglow.c \
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effects/gstgleffectblur.c \
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effects/gstgleffectsobel.c \
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effects/gstgleffectlaplacian.c \
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gstglcolorscale.c \
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gstglmixer.c \
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gstglvideomixer.c \
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@ -58,7 +59,6 @@ noinst_HEADERS = \
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# full opengl required
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if USE_OPENGL
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libgstopengl_la_SOURCES += \
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gstglfilterlaplacian.c \
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gstglfilterglass.c \
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gstgldeinterlace.c \
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gltestsrc.c \
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@ -66,7 +66,6 @@ libgstopengl_la_SOURCES += \
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gstglmosaic.c
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noinst_HEADERS += \
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gstglfilterlaplacian.h \
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gstglfilterglass.h \
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gstgldeinterlace.h \
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gltestsrc.h \
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74
ext/gl/effects/gstgleffectlaplacian.c
Normal file
74
ext/gl/effects/gstgleffectlaplacian.c
Normal file
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@ -0,0 +1,74 @@
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/*
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* GStreamer
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* Copyright (C) 2008-2010 Filippo Argiolas <filippo.argiolas@gmail.com>
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* Copyright (C) 2015 Michał Dębski <debski.mi.zd@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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "../gstgleffects.h"
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static void
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gst_gl_effects_laplacian_callback (gint width, gint height, guint texture,
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gpointer data)
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{
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GstGLShader *shader = NULL;
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GstGLEffects *effects = GST_GL_EFFECTS (data);
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GstGLFilter *filter = GST_GL_FILTER (effects);
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if (NULL != (shader = gst_gl_effects_get_fragment_shader (effects, "conv0",
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conv9_fragment_source_gles2, conv9_fragment_source_opengl))) {
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GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
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static gfloat kernel[9] = { 0.0, -1.0, 0.0,
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-1.0, 4.0, -1.0,
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0.0, -1.0, 0.0
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};
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#if GST_GL_HAVE_OPENGL
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if (USING_OPENGL (GST_GL_BASE_FILTER (filter)->context)) {
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gl->MatrixMode (GL_PROJECTION);
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gl->LoadIdentity ();
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}
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#endif
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gst_gl_shader_use (shader);
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gl->ActiveTexture (GL_TEXTURE0);
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gl->Enable (GL_TEXTURE_2D);
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gl->BindTexture (GL_TEXTURE_2D, texture);
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gl->Disable (GL_TEXTURE_2D);
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gst_gl_shader_set_uniform_1i (shader, "tex", 0);
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gst_gl_shader_set_uniform_1f (shader, "height", height);
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gst_gl_shader_set_uniform_1f (shader, "width", width);
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gst_gl_shader_set_uniform_1fv (shader, "kernel", 9, kernel);
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gst_gl_shader_set_uniform_1i (shader, "invert", effects->invert);
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gst_gl_filter_draw_texture (filter, texture, width, height);
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}
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}
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void
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gst_gl_effects_laplacian (GstGLEffects * effects)
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{
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gst_gl_filter_render_to_target (GST_GL_FILTER (effects), TRUE,
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effects->intexture, effects->outtexture,
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gst_gl_effects_laplacian_callback, effects);
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}
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@ -803,4 +803,66 @@ const gchar *difference_fragment_source =
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"gl_FragColor = vec4 (step (0.12, length (savedcolor - currentcolor)));"
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"}";
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/* This filter is meant as a demo of gst-plugins-gl + glsl
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capabilities. So I'm keeping this shader readable enough. If and
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when this shader will be used in production be careful to hard code
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kernel into the shader and remove unneeded zero multiplications in
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the convolution */
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const gchar *conv9_fragment_source_opengl =
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"uniform sampler2D tex;"
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"uniform float kernel[9];"
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"uniform float width, height;"
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"uniform bool invert;"
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"void main () {"
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" float w = 1.0 / width;"
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" float h = 1.0 / height;"
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" vec2 texturecoord[9];"
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" texturecoord[4] = gl_TexCoord[0].st;" /* 0 0 */
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" texturecoord[5] = texturecoord[4] + vec2(w, 0.0);" /* 1 0 */
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" texturecoord[2] = texturecoord[5] - vec2(0.0, h);" /* 1 -1 */
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" texturecoord[1] = texturecoord[2] - vec2(w, 0.0);" /* 0 -1 */
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" texturecoord[0] = texturecoord[1] - vec2(w, 0.0);" /* -1 -1 */
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" texturecoord[3] = texturecoord[0] + vec2(0.0, h);" /* -1 0 */
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" texturecoord[6] = texturecoord[3] + vec2(0.0, h);" /* -1 1 */
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" texturecoord[7] = texturecoord[6] + vec2(w, 0.0);" /* 0 1 */
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" texturecoord[8] = texturecoord[7] + vec2(w, 0.0);" /* 1 1 */
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" int i;"
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" vec3 sum = vec3 (0.0);"
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" for (i = 0; i < 9; i++) { "
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" vec4 neighbor = texture2D (tex, texturecoord[i]);"
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" sum += neighbor.xyz * kernel[i];"
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" }"
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" gl_FragColor = vec4 (abs(sum - vec3(float(invert))), 1.0);"
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"}";
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const gchar *conv9_fragment_source_gles2 =
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"#ifdef GL_ES\n"
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"precision mediump float;\n"
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"#endif\n"
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"varying vec2 v_texcoord;"
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"uniform sampler2D tex;"
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"uniform float kernel[9];"
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"uniform float width, height;"
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"void main () {"
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" float w = 1.0 / width;"
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" float h = 1.0 / height;"
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" vec2 texturecoord[9];"
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" texturecoord[4] = v_texcoord.xy;" /* 0 0 */
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" texturecoord[5] = texturecoord[4] + vec2(w, 0.0);" /* 1 0 */
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" texturecoord[2] = texturecoord[5] - vec2(0.0, h);" /* 1 -1 */
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" texturecoord[1] = texturecoord[2] - vec2(w, 0.0);" /* 0 -1 */
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" texturecoord[0] = texturecoord[1] - vec2(w, 0.0);" /* -1 -1 */
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" texturecoord[3] = texturecoord[0] + vec2(0.0, h);" /* -1 0 */
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" texturecoord[6] = texturecoord[3] + vec2(0.0, h);" /* -1 1 */
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" texturecoord[7] = texturecoord[6] + vec2(w, 0.0);" /* 0 1 */
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" texturecoord[8] = texturecoord[7] + vec2(w, 0.0);" /* 1 1 */
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" int i;"
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" vec3 sum = vec3 (0.0);"
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" for (i = 0; i < 9; i++) { "
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" vec4 neighbor = texture2D (tex, texturecoord[i]);"
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" sum += neighbor.xyz * kernel[i];"
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" }"
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" gl_FragColor = vec4 (abs(sum - vec3(float(invert))), 1.0);"
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"}";
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/* *INDENT-ON* */
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@ -41,6 +41,7 @@ extern const gchar *sep_sobel_hconv3_fragment_source_opengl;
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extern const gchar *sep_sobel_vconv3_fragment_source_opengl;
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extern const gchar *sep_sobel_length_fragment_source_opengl;
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extern const gchar *multiply_fragment_source_opengl;
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extern const gchar *conv9_fragment_source_opengl;
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extern const gchar *mirror_fragment_source_gles2;
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extern const gchar *squeeze_fragment_source_gles2;
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@ -62,6 +63,7 @@ extern const gchar *sep_sobel_hconv3_fragment_source_gles2;
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extern const gchar *sep_sobel_vconv3_fragment_source_gles2;
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extern const gchar *sep_sobel_length_fragment_source_gles2;
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extern const gchar *multiply_fragment_source_gles2;
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extern const gchar *conv9_fragment_source_gles2;
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extern const gchar *interpolate_fragment_source;
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extern const gchar *texture_interp_fragment_source;
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@ -92,6 +92,7 @@ typedef enum
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GST_GL_EFFECT_GLOW,
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GST_GL_EFFECT_SOBEL,
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GST_GL_EFFECT_BLUR,
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GST_GL_EFFECT_LAPLACIAN,
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GST_GL_N_EFFECTS
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} GstGLEffectsEffect;
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@ -119,6 +120,7 @@ gst_gl_effects_effect_get_type (void)
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{GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow"},
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{GST_GL_EFFECT_SOBEL, "Sobel edge detection Effect", "sobel"},
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{GST_GL_EFFECT_BLUR, "Blur with 9x9 separable convolution Effect", "blur"},
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{GST_GL_EFFECT_LAPLACIAN, "Laplacian Convolution Demo Effect", "laplacian"},
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{0, NULL, NULL}
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};
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@ -243,6 +245,12 @@ gst_gl_effects_set_effect (GstGLEffects * effects, gint effect_type)
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GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3;
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effects->current_effect = effect_type;
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break;
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case GST_GL_EFFECT_LAPLACIAN:
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effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_laplacian;
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filter_class->supported_gl_api =
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GST_GL_API_GLES2 | GST_GL_API_OPENGL | GST_GL_API_OPENGL3;
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effects->current_effect = effect_type;
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break;
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default:
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g_assert_not_reached ();
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}
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@ -334,7 +342,7 @@ gst_gl_effects_class_init (GstGLEffectsClass * klass)
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g_object_class_install_property (gobject_class,
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PROP_INVERT,
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g_param_spec_boolean ("invert",
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"Invert the colours for sobel effect",
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"Invert the colours for sobel and laplacian effect",
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"Invert colors to get dark edges on bright background when using sobel effect",
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FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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@ -111,6 +111,7 @@ void gst_gl_effects_sin (GstGLEffects *effects);
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void gst_gl_effects_glow (GstGLEffects *effects);
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void gst_gl_effects_sobel (GstGLEffects *effects);
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void gst_gl_effects_blur (GstGLEffects *effects);
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void gst_gl_effects_laplacian (GstGLEffects *effects);
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G_END_DECLS
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@ -1,225 +0,0 @@
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/*
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* GStreamer
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* Copyright (C) 2008-2010 Filippo Argiolas <filippo.argiolas@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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/**
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* SECTION:element-glfilterlaplacian
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*
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* Laplacian Convolution Demo Filter.
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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 videotestsrc ! glupload ! glfilterlaplacian ! glimagesink
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* ]|
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* FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
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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 "gstglfilterlaplacian.h"
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#define GST_CAT_DEFAULT gst_gl_filter_laplacian_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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enum
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{
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PROP_0
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};
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_filter_laplacian_debug, "glfilterlaplacian", 0, "glfilterlaplacian element");
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G_DEFINE_TYPE_WITH_CODE (GstGLFilterLaplacian, gst_gl_filter_laplacian,
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GST_TYPE_GL_FILTER, DEBUG_INIT);
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static void gst_gl_filter_laplacian_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_laplacian_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_laplacian_reset (GstGLFilter * filter);
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static gboolean gst_gl_filter_laplacian_init_shader (GstGLFilter * filter);
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static gboolean gst_gl_filter_laplacian_filter_texture (GstGLFilter * filter,
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guint in_tex, guint out_tex);
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static void gst_gl_filter_laplacian_callback (gint width, gint height,
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guint texture, gpointer stuff);
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/* *INDENT-OFF* */
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/* This filter is meant as a demo of gst-plugins-gl + glsl
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capabilities. So I'm keeping this shader readable enough. If and
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when this shader will be used in production be careful to hard code
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kernel into the shader and remove unneeded zero multiplications in
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the convolution */
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static const gchar *convolution_fragment_source =
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"uniform sampler2D tex;"
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"uniform float kernel[9];"
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"uniform float width, height;"
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"void main () {"
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" float w = 1.0 / width;"
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" float h = 1.0 / height;"
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" vec2 texturecoord[9];"
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" texturecoord[4] = gl_TexCoord[0].st;" /* 0 0 */
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" texturecoord[5] = texturecoord[4] + vec2(w, 0.0);" /* 1 0 */
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" texturecoord[2] = texturecoord[5] - vec2(0.0, h);" /* 1 -1 */
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" texturecoord[1] = texturecoord[2] - vec2(w, 0.0);" /* 0 -1 */
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" texturecoord[0] = texturecoord[1] - vec2(w, 0.0);" /* -1 -1 */
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" texturecoord[3] = texturecoord[0] + vec2(0.0, h);" /* -1 0 */
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" texturecoord[6] = texturecoord[3] + vec2(0.0, h);" /* -1 1 */
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" texturecoord[7] = texturecoord[6] + vec2(w, 0.0);" /* 0 1 */
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" texturecoord[8] = texturecoord[7] + vec2(w, 0.0);" /* 1 1 */
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" int i;"
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" vec4 sum = vec4 (0.0);"
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" for (i = 0; i < 9; i++) { "
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" vec4 neighbor = texture2D(tex, texturecoord[i]);"
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" sum += neighbor * kernel[i];"
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" }"
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" gl_FragColor = sum;"
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"}";
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/* *INDENT-ON* */
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static void
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gst_gl_filter_laplacian_class_init (GstGLFilterLaplacianClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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gobject_class->set_property = gst_gl_filter_laplacian_set_property;
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gobject_class->get_property = gst_gl_filter_laplacian_get_property;
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gst_element_class_set_metadata (element_class,
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"OpenGL laplacian filter", "Filter/Effect/Video",
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"Laplacian Convolution Demo Filter",
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"Filippo Argiolas <filippo.argiolas@gmail.com>");
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GST_GL_FILTER_CLASS (klass)->filter_texture =
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gst_gl_filter_laplacian_filter_texture;
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GST_GL_FILTER_CLASS (klass)->onInitFBO = gst_gl_filter_laplacian_init_shader;
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GST_GL_FILTER_CLASS (klass)->onReset = gst_gl_filter_laplacian_reset;
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GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api = GST_GL_API_OPENGL;
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}
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static void
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gst_gl_filter_laplacian_init (GstGLFilterLaplacian * filter)
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{
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filter->shader = NULL;
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}
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static void
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gst_gl_filter_laplacian_reset (GstGLFilter * filter)
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{
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GstGLFilterLaplacian *laplacian_filter = GST_GL_FILTER_LAPLACIAN (filter);
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//blocking call, wait the opengl thread has destroyed the shader
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if (laplacian_filter->shader)
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gst_gl_context_del_shader (GST_GL_BASE_FILTER (filter)->context,
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laplacian_filter->shader);
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laplacian_filter->shader = NULL;
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}
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static void
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gst_gl_filter_laplacian_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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//GstGLFilterLaplacian *filter = GST_GL_FILTER_LAPLACIAN (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 void
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gst_gl_filter_laplacian_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
|
||||
{
|
||||
//GstGLFilterLaplacian *filter = GST_GL_FILTER_LAPLACIAN (object);
|
||||
|
||||
switch (prop_id) {
|
||||
default:
|
||||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_gl_filter_laplacian_init_shader (GstGLFilter * filter)
|
||||
{
|
||||
GstGLFilterLaplacian *laplacian_filter = GST_GL_FILTER_LAPLACIAN (filter);
|
||||
|
||||
//blocking call, wait the opengl thread has compiled the shader
|
||||
return gst_gl_context_gen_shader (GST_GL_BASE_FILTER (filter)->context, 0,
|
||||
convolution_fragment_source, &laplacian_filter->shader);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_gl_filter_laplacian_filter_texture (GstGLFilter * filter, guint in_tex,
|
||||
guint out_tex)
|
||||
{
|
||||
gpointer laplacian_filter = GST_GL_FILTER_LAPLACIAN (filter);
|
||||
|
||||
|
||||
//blocking call, use a FBO
|
||||
gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
|
||||
gst_gl_filter_laplacian_callback, laplacian_filter);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
//opengl scene, params: input texture (not the output filter->texture)
|
||||
static void
|
||||
gst_gl_filter_laplacian_callback (gint width, gint height, guint texture,
|
||||
gpointer stuff)
|
||||
{
|
||||
GstGLFilter *filter = GST_GL_FILTER (stuff);
|
||||
GstGLFilterLaplacian *laplacian_filter = GST_GL_FILTER_LAPLACIAN (filter);
|
||||
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
|
||||
|
||||
gfloat kernel[9] = { 0.0, -1.0, 0.0,
|
||||
-1.0, 4.0, -1.0,
|
||||
0.0, -1.0, 0.0
|
||||
};
|
||||
|
||||
gl->MatrixMode (GL_PROJECTION);
|
||||
gl->LoadIdentity ();
|
||||
|
||||
gst_gl_shader_use (laplacian_filter->shader);
|
||||
|
||||
gl->ActiveTexture (GL_TEXTURE0);
|
||||
gl->Enable (GL_TEXTURE_2D);
|
||||
gl->BindTexture (GL_TEXTURE_2D, texture);
|
||||
|
||||
gst_gl_shader_set_uniform_1i (laplacian_filter->shader, "tex", 0);
|
||||
gst_gl_shader_set_uniform_1fv (laplacian_filter->shader, "kernel", 9, kernel);
|
||||
gst_gl_shader_set_uniform_1f (laplacian_filter->shader, "width",
|
||||
(gfloat) width);
|
||||
gst_gl_shader_set_uniform_1f (laplacian_filter->shader, "height",
|
||||
(gfloat) height);
|
||||
|
||||
gst_gl_filter_draw_texture (filter, texture, width, height);
|
||||
}
|
|
@ -1,53 +0,0 @@
|
|||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _GST_GL_FILTERLAPLACIAN_H_
|
||||
#define _GST_GL_FILTERLAPLACIAN_H_
|
||||
|
||||
#include <gst/gl/gstglfilter.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GST_TYPE_GL_FILTER_LAPLACIAN (gst_gl_filter_laplacian_get_type())
|
||||
#define GST_GL_FILTER_LAPLACIAN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_FILTER_LAPLACIAN,GstGLFilterLaplacian))
|
||||
#define GST_IS_GL_FILTER_LAPLACIAN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_FILTER_LAPLACIAN))
|
||||
#define GST_GL_FILTER_LAPLACIAN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_FILTER_LAPLACIAN,GstGLFilterLaplacianClass))
|
||||
#define GST_IS_GL_FILTER_LAPLACIAN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_FILTER_LAPLACIAN))
|
||||
#define GST_GL_FILTER_LAPLACIAN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_FILTER_LAPLACIAN,GstGLFilterLaplacianClass))
|
||||
|
||||
typedef struct _GstGLFilterLaplacian GstGLFilterLaplacian;
|
||||
typedef struct _GstGLFilterLaplacianClass GstGLFilterLaplacianClass;
|
||||
|
||||
struct _GstGLFilterLaplacian
|
||||
{
|
||||
GstGLFilter filter;
|
||||
GstGLShader *shader;
|
||||
};
|
||||
|
||||
struct _GstGLFilterLaplacianClass
|
||||
{
|
||||
GstGLFilterClass filter_class;
|
||||
};
|
||||
|
||||
GType gst_gl_filter_laplacian_get_type (void);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* _GST_GLFILTERLAPLACIAN_H_ */
|
|
@ -69,7 +69,6 @@
|
|||
|
||||
#if GST_GL_HAVE_OPENGL
|
||||
#include "gstgltestsrc.h"
|
||||
#include "gstglfilterlaplacian.h"
|
||||
#include "gstglfilterglass.h"
|
||||
/* #include "gstglfilterreflectedscreen.h" */
|
||||
#include "gstgldeinterlace.h"
|
||||
|
@ -200,11 +199,6 @@ plugin_init (GstPlugin * plugin)
|
|||
return FALSE;
|
||||
}
|
||||
|
||||
if (!gst_element_register (plugin, "glfilterlaplacian",
|
||||
GST_RANK_NONE, GST_TYPE_GL_FILTER_LAPLACIAN)) {
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (!gst_element_register (plugin, "glfilterglass",
|
||||
GST_RANK_NONE, GST_TYPE_GL_FILTER_GLASS)) {
|
||||
return FALSE;
|
||||
|
|
Loading…
Reference in a new issue