gstreamer/gst/gl/gstgleffects.c

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/*
* 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
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
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/**
* SECTION:element-gleffects.
*
* GL Shading Language effects.
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch videotestsrc ! glupload ! gleffects effect=5 ! glimagesink
* ]|
* FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
* </refsect2>
*/
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gl/gstglconfig.h>
#include "gstgleffects.h"
#define GST_TYPE_GL_EFFECTS (gst_gl_effects_get_type())
#define GST_GL_EFFECTS(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_GL_EFFECTS,GstGLEffects))
#define GST_IS_GL_EFFECTS(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_GL_EFFECTS))
#define GST_GL_EFFECTS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) , GST_TYPE_GL_EFFECTS,GstGLEffectsClass))
#define GST_IS_GL_EFFECTS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) , GST_TYPE_GL_EFFECTS))
#define GST_GL_EFFECTS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) , GST_TYPE_GL_EFFECTS,GstGLEffectsClass))
#define GST_CAT_DEFAULT gst_gl_effects_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_effects_debug, "gleffects", 0, "gleffects element");
G_DEFINE_TYPE_WITH_CODE (GstGLEffects, gst_gl_effects, GST_TYPE_GL_FILTER,
DEBUG_INIT);
static void gst_gl_effects_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_effects_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_effects_init_resources (GstGLFilter * filter);
static void gst_gl_effects_reset_resources (GstGLFilter * filter);
static gboolean gst_gl_effects_on_init_gl_context (GstGLFilter * filter);
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static void gst_gl_effects_ghash_func_clean (gpointer key, gpointer value,
gpointer data);
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static gboolean gst_gl_effects_filter_texture (GstGLFilter * filter,
guint in_tex, guint out_tex);
/* dont' forget to edit the following when a new effect is added */
typedef enum
{
GST_GL_EFFECT_IDENTITY,
GST_GL_EFFECT_MIRROR,
GST_GL_EFFECT_SQUEEZE,
GST_GL_EFFECT_STRETCH,
GST_GL_EFFECT_TUNNEL,
GST_GL_EFFECT_FISHEYE,
GST_GL_EFFECT_TWIRL,
GST_GL_EFFECT_BULGE,
GST_GL_EFFECT_SQUARE,
GST_GL_EFFECT_HEAT,
GST_GL_EFFECT_SEPIA,
GST_GL_EFFECT_XPRO,
GST_GL_EFFECT_LUMA_XPRO,
GST_GL_EFFECT_XRAY,
GST_GL_EFFECT_SIN,
GST_GL_EFFECT_GLOW,
GST_GL_N_EFFECTS
} GstGLEffectsEffect;
#define GST_TYPE_GL_EFFECTS_EFFECT (gst_gl_effects_effect_get_type ())
static GType
gst_gl_effects_effect_get_type (void)
{
static GType gl_effects_effect_type = 0;
static const GEnumValue effect_types[] = {
{GST_GL_EFFECT_IDENTITY, "Do nothing Effect", "identity"},
{GST_GL_EFFECT_MIRROR, "Mirror Effect", "mirror"},
{GST_GL_EFFECT_SQUEEZE, "Squeeze Effect", "squeeze"},
#if GST_GL_HAVE_OPENGL
{GST_GL_EFFECT_STRETCH, "Stretch Effect", "stretch"},
{GST_GL_EFFECT_FISHEYE, "FishEye Effect", "fisheye"},
{GST_GL_EFFECT_TWIRL, "Twirl Effect", "twirl"},
{GST_GL_EFFECT_BULGE, "Bulge Effect", "bulge"},
{GST_GL_EFFECT_TUNNEL, "Light Tunnel Effect", "tunnel"},
{GST_GL_EFFECT_SQUARE, "Square Effect", "square"},
{GST_GL_EFFECT_HEAT, "Heat Signature Effect", "heat"},
{GST_GL_EFFECT_SEPIA, "Sepia Toning Effect", "sepia"},
{GST_GL_EFFECT_XPRO, "Cross Processing Effect", "xpro"},
{GST_GL_EFFECT_LUMA_XPRO, "Luma Cross Processing Effect", "lumaxpro"},
{GST_GL_EFFECT_XRAY, "Glowing negative effect", "xray"},
{GST_GL_EFFECT_SIN, "All Grey but Red Effect", "sin"},
{GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow"},
#endif
{0, NULL, NULL}
};
if (!gl_effects_effect_type) {
gl_effects_effect_type =
g_enum_register_static ("GstGLEffectsEffect", effect_types);
}
return gl_effects_effect_type;
}
static void
gst_gl_effects_set_effect (GstGLEffects * effects, gint effect_type)
{
switch (effect_type) {
case GST_GL_EFFECT_IDENTITY:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_identity;
break;
case GST_GL_EFFECT_MIRROR:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_mirror;
break;
case GST_GL_EFFECT_SQUEEZE:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_squeeze;
break;
#if GST_GL_HAVE_OPENGL
case GST_GL_EFFECT_STRETCH:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_stretch;
break;
case GST_GL_EFFECT_TUNNEL:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_tunnel;
break;
case GST_GL_EFFECT_FISHEYE:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_fisheye;
break;
case GST_GL_EFFECT_TWIRL:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_twirl;
break;
case GST_GL_EFFECT_BULGE:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_bulge;
break;
case GST_GL_EFFECT_SQUARE:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_square;
break;
case GST_GL_EFFECT_HEAT:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_heat;
break;
case GST_GL_EFFECT_SEPIA:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sepia;
break;
case GST_GL_EFFECT_XPRO:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_xpro;
break;
case GST_GL_EFFECT_LUMA_XPRO:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_luma_xpro;
break;
case GST_GL_EFFECT_XRAY:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_xray;
break;
case GST_GL_EFFECT_SIN:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sin;
break;
case GST_GL_EFFECT_GLOW:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_glow;
break;
#endif
default:
g_assert_not_reached ();
}
effects->current_effect = effect_type;
}
/* init resources that need a gl context */
static void
gst_gl_effects_init_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
for (i = 0; i < NEEDED_TEXTURES; i++) {
glGenTextures (1, &effects->midtexture[i]);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, effects->midtexture[i]);
glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
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GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
}
}
/* free resources that need a gl context */
static void
gst_gl_effects_reset_gl_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
for (i = 0; i < NEEDED_TEXTURES; i++) {
glDeleteTextures (1, &effects->midtexture[i]);
effects->midtexture[i] = 0;
}
for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) {
glDeleteTextures (1, &effects->curve[i]);
effects->curve[i] = 0;
}
}
static void
gst_gl_effects_class_init (GstGLEffectsClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_effects_set_property;
gobject_class->get_property = gst_gl_effects_get_property;
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GST_GL_FILTER_CLASS (klass)->filter_texture = gst_gl_effects_filter_texture;
GST_GL_FILTER_CLASS (klass)->display_init_cb =
gst_gl_effects_init_gl_resources;
GST_GL_FILTER_CLASS (klass)->display_reset_cb =
gst_gl_effects_reset_gl_resources;
GST_GL_FILTER_CLASS (klass)->onStart = gst_gl_effects_init_resources;
GST_GL_FILTER_CLASS (klass)->onStop = gst_gl_effects_reset_resources;
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GST_GL_FILTER_CLASS (klass)->onInitFBO = gst_gl_effects_on_init_gl_context;
g_object_class_install_property (gobject_class,
PROP_EFFECT,
g_param_spec_enum ("effect",
"Effect",
"Select which effect apply to GL video texture",
GST_TYPE_GL_EFFECTS_EFFECT,
GST_GL_EFFECT_IDENTITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_HSWAP,
g_param_spec_boolean ("hswap",
"Horizontal Swap",
"Switch video texture left to right, useful with webcams",
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class,
"Gstreamer OpenGL Effects", "Filter/Effect/Video",
"GL Shading Language effects",
"Filippo Argiolas <filippo.argiolas@gmail.com>");
}
void
gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex, guint width,
guint height)
{
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GstGLDisplay *display = GST_GL_FILTER (effects)->display;
GstGLFuncs *gl = display->gl_vtable;
#if GST_GL_HAVE_OPENGL
if (gst_gl_display_get_gl_api (display) & GST_GL_API_OPENGL) {
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gfloat verts[] = { -1.0f, -1.0f,
1.0f, -1.0f,
1.0f, 1.0f,
-1.0f, 1.0f
};
gint texcoords[] = { 0, 0,
width, 0,
width, height,
0, height
};
gl->ActiveTexture (GL_TEXTURE0);
gl->Enable (GL_TEXTURE_RECTANGLE_ARB);
gl->BindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
gl->EnableClientState (GL_VERTEX_ARRAY);
gl->EnableClientState (GL_TEXTURE_COORD_ARRAY);
gl->VertexPointer (2, GL_FLOAT, 0, &verts);
gl->TexCoordPointer (2, GL_INT, 0, &texcoords);
gl->DrawArrays (GL_TRIANGLE_FAN, 0, 4);
gl->DisableClientState (GL_VERTEX_ARRAY);
gl->DisableClientState (GL_TEXTURE_COORD_ARRAY);
}
#endif
#if GST_GL_HAVE_GLES2
if (gst_gl_display_get_gl_api (display) & GST_GL_API_GLES2) {
const GLfloat vVertices[] = {
-1.0f, -1.0f, 0.0f,
0.0f, 0.0f,
1.0, -1.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
/* glClear (GL_COLOR_BUFFER_BIT); */
/* Load the vertex position */
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gl->VertexAttribPointer (effects->draw_attr_position_loc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), vVertices);
/* Load the texture coordinate */
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gl->VertexAttribPointer (effects->draw_attr_texture_loc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]);
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gl->EnableVertexAttribArray (effects->draw_attr_position_loc);
gl->EnableVertexAttribArray (effects->draw_attr_texture_loc);
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gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
}
#endif
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gst_gl_display_clear_shader (display);
}
static void
set_horizontal_swap (GstGLDisplay * display, gpointer data)
{
#if GST_GL_HAVE_OPENGL
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GstGLFuncs *gl = display->gl_vtable;
if (gst_gl_display_get_gl_api (display) & GST_GL_API_OPENGL) {
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const gfloat mirrormatrix[16] = {
-1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0
};
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gl->MatrixMode (GL_MODELVIEW);
gl->LoadMatrixf (mirrormatrix);
}
#endif
}
static void
gst_gl_effects_init (GstGLEffects * effects)
{
effects->effect = gst_gl_effects_identity;
effects->horizontal_swap = FALSE;
}
static void
gst_gl_effects_ghash_func_clean (gpointer key, gpointer value, gpointer data)
{
GstGLShader *shader = (GstGLShader *) value;
GstGLFilter *filter = (GstGLFilter *) data;
//blocking call, wait the opengl thread has destroyed the shader
gst_gl_display_del_shader (filter->display, shader);
value = NULL;
}
static void
gst_gl_effects_reset_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
/* release shaders in the gl thread */
g_hash_table_foreach (effects->shaderstable, gst_gl_effects_ghash_func_clean,
filter);
/* clean the htable without calling values destructors
* because shaders have been released in the glthread
* through the foreach func */
g_hash_table_unref (effects->shaderstable);
effects->shaderstable = NULL;
}
static void
gst_gl_effects_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLEffects *effects = GST_GL_EFFECTS (object);
switch (prop_id) {
case PROP_EFFECT:
gst_gl_effects_set_effect (effects, g_value_get_enum (value));
break;
case PROP_HSWAP:
effects->horizontal_swap = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_effects_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLEffects *effects = GST_GL_EFFECTS (object);
switch (prop_id) {
case PROP_EFFECT:
g_value_set_enum (value, effects->current_effect);
break;
case PROP_HSWAP:
g_value_set_boolean (value, effects->horizontal_swap);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_effects_init_resources (GstGLFilter * filter)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
gint i;
effects->shaderstable = g_hash_table_new (g_str_hash, g_str_equal);
for (i = 0; i < NEEDED_TEXTURES; i++) {
effects->midtexture[i] = 0;
}
for (i = 0; i < GST_GL_EFFECTS_N_CURVES; i++) {
effects->curve[i] = 0;
}
}
static gboolean
gst_gl_effects_on_init_gl_context (GstGLFilter * filter)
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{
return TRUE;
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}
static gboolean
gst_gl_effects_filter_texture (GstGLFilter * filter, guint in_tex,
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guint out_tex)
{
GstGLEffects *effects = GST_GL_EFFECTS (filter);
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effects->intexture = in_tex;
effects->outtexture = out_tex;
if (effects->horizontal_swap == TRUE)
gst_gl_display_thread_add (filter->display, set_horizontal_swap, effects);
effects->effect (effects);
return TRUE;
}