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
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#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(bla) \
GST_DEBUG_CATEGORY_INIT (gst_gl_effects_debug, "gleffects", 0, "gleffects element");
GST_BOILERPLATE_FULL (GstGLEffects, gst_gl_effects, GstGLFilter,
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);
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static void gst_gl_effects_on_init_gl_context (GstGLFilter* filter);
static void gst_gl_effects_ghash_func_clean (gpointer key, gpointer value, gpointer data);
static gboolean gst_gl_effects_filter (GstGLFilter * filter,
GstGLBuffer * inbuf, GstGLBuffer * outbuf);
static const GstElementDetails element_details = GST_ELEMENT_DETAILS (
"Gstreamer OpenGL Effects",
"Filter/Effect",
"GL Shading Language effects",
"Filippo Argiolas <filippo.argiolas@gmail.com>");
/* 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_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" },
{ 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_SIN, "All Grey but Red Effect", "sin" },
{ GST_GL_EFFECT_GLOW, "Glow Lighting Effect", "glow" },
{ 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;
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_SIN:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_sin;
break;
case GST_GL_EFFECT_GLOW:
effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_glow;
break;
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,
filter->width, filter->height, 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<10; 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_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &element_details);
}
static void
gst_gl_effects_class_init (GstGLEffectsClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_gl_effects_set_property;
gobject_class->get_property = gst_gl_effects_get_property;
GST_GL_FILTER_CLASS (klass)->filter = gst_gl_effects_filter;
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));
}
void
gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex)
{
GstGLFilter *filter = GST_GL_FILTER (effects);
glActiveTexture (GL_TEXTURE0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
glBegin (GL_QUADS);
glTexCoord2f (0.0, 0.0);
glVertex2f (-1.0, -1.0);
glTexCoord2f ((gfloat)filter->width, 0.0);
glVertex2f (1.0, -1.0);
glTexCoord2f ((gfloat)filter->width, (gfloat)filter->height);
glVertex2f (1.0, 1.0);
glTexCoord2f (0.0, (gfloat)filter->height);
glVertex2f (-1.0, 1.0);
glEnd ();
}
static void
set_horizontal_swap (GstGLDisplay *display, gpointer data)
{
// GstGLEffects *effects = GST_GL_EFFECTS (data);
const double 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
};
glMatrixMode (GL_MODELVIEW);
glLoadMatrixd (mirrormatrix);
}
static void
gst_gl_effects_init (GstGLEffects * effects, GstGLEffectsClass * klass)
{
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);
// g_message ("reset resources");
//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;
// g_message ("init resources");
// g_message ("init hashtable");
effects->shaderstable = g_hash_table_new (g_str_hash,
g_str_equal);
// g_message ("zero textures and curves");
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;
}
}
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static void
gst_gl_effects_on_init_gl_context (GstGLFilter* filter)
{
//check that your hardware supports shader
//if not the pipeline correctly shut down
gst_gl_display_gen_shader (filter->display, 0, 0, NULL);
}
static gboolean
gst_gl_effects_filter (GstGLFilter* filter, GstGLBuffer* inbuf,
GstGLBuffer* outbuf)
{
GstGLEffects* effects = GST_GL_EFFECTS(filter);
effects->intexture = inbuf->texture;
effects->outtexture = outbuf->texture;
if (effects->horizontal_swap == TRUE)
gst_gl_display_thread_add (filter->display, set_horizontal_swap, effects);
effects->effect (effects);
return TRUE;
}