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gstreamer/ext/gl/gstglalpha.c
Matthew Waters 675415bf2e gl: try to use highp precision where supported 
The use of mediump as a specifier in GLSL shaders will have limited
resolution and when used as texture coordinates may become inaccurate
over texture sizes of 1024.
2019-02-28 17:26:32 +11:00

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/* GStreamer
* Copyright (C) 2018 Matthew Waters <matthew@centricular.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.
*/
/*
* This file was modified from the alpha element and converted to OpenGL
*/
/**
* SECTION:element-glalpha
* @title: glalpha
*
* The glalpha element adds an alpha channel to a video stream. The values
* of the alpha channel can be either be set to a constant or can be
* dynamically calculated via chroma keying, e.g. blue can be set as
* the transparent color.
*
* Sample pipeline:
* |[
* gst-launch-1.0 gltestsrc pattern=snow ! mixer.sink_0 \
* gltestsrc pattern=smpte ! glalpha method=green ! mixer.sink_1 \
* glvideomixer name=mixer sink_0::zorder=0 sink_1::zorder=1 ! \
* glimagesink
* ]| This pipeline adds a alpha channel to the SMPTE color bars
* with green as the transparent color and overlays the output on
* top of a snow video stream.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglalpha.h"
#include <string.h>
#include <math.h>
#include <gst/gl/gstglfuncs.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
GST_DEBUG_CATEGORY_STATIC (glalpha_debug);
#define GST_CAT_DEFAULT glalpha_debug
#define GST_TYPE_GL_ALPHA_METHOD (gst_gl_alpha_method_get_type())
static GType
gst_gl_alpha_method_get_type (void)
{
static GType alpha_method_type = 0;
static const GEnumValue alpha_method[] = {
{ALPHA_METHOD_SET, "Set/adjust alpha channel", "set"},
{ALPHA_METHOD_GREEN, "Chroma Key on pure green", "green"},
{ALPHA_METHOD_BLUE, "Chroma Key on pure blue", "blue"},
{ALPHA_METHOD_CUSTOM, "Chroma Key on custom RGB values", "custom"},
{0, NULL, NULL},
};
if (!alpha_method_type) {
alpha_method_type =
g_enum_register_static ("GstGLAlphaMethod", alpha_method);
}
return alpha_method_type;
}
/* GstGLAlpha properties */
#define DEFAULT_METHOD ALPHA_METHOD_SET
#define DEFAULT_ALPHA 1.0
#define DEFAULT_TARGET_R 0
#define DEFAULT_TARGET_G 255
#define DEFAULT_TARGET_B 0
#define DEFAULT_ANGLE 20.0
#define DEFAULT_NOISE_LEVEL 2.0
#define DEFAULT_BLACK_SENSITIVITY 100
#define DEFAULT_WHITE_SENSITIVITY 100
enum
{
PROP_0,
PROP_METHOD,
PROP_ALPHA,
PROP_TARGET_R,
PROP_TARGET_G,
PROP_TARGET_B,
PROP_ANGLE,
PROP_NOISE_LEVEL,
PROP_BLACK_SENSITIVITY,
PROP_WHITE_SENSITIVITY,
};
/* *INDENT-OFF* */
static const gchar *alpha_frag =
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"uniform float alpha;\n"
"void main () {\n"
" vec4 rgba = texture2D (tex, v_texcoord);\n"
" rgba.a = alpha;\n"
" gl_FragColor = rgba;\n"
"}\n";
static const gchar *chroma_key_frag =
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"uniform float cb;\n"
"uniform float cr;\n"
"uniform float kg;\n"
"uniform float accept_angle_tg;\n"
"uniform float accept_angle_ctg;\n"
"uniform float one_over_kc;\n"
"uniform float kfgy_scale;\n"
"uniform float noise_level2;\n"
"uniform float smin;\n"
"uniform float smax;\n"
/* these values are taken from the alpha element and divided by 256 to
* get the floating point numbers below.
* XXX: They are different from the values produced by videoconvert and used
* by glcolorconvert
298, 0, 409, -57068,
298, -100, -208, 34707,
298, 516, 0, -70870,
*/
"#define from_yuv_bt601_offset vec3(-0.0625, -0.5, -0.5)\n"
"#define from_yuv_bt601_rcoeff vec3(1.1640625, 0.000, 1.787)\n"
"#define from_yuv_bt601_gcoeff vec3(1.1640625,-0.213,-0.531)\n"
"#define from_yuv_bt601_bcoeff vec3(1.1640625, 2.112, 0.000)\n"
/* these values are taken from the alpha element and divided by 256 to
* get the floating point numbers below
* XXX: They are different from the values produced by videoconvert and used
* by glcolorconvert
66, 129, 25, 4096,
-38, -74, 112, 32768,
112, -94, -18, 32768,
*/
"#define from_rgb_bt601_offset vec3(0.0625, 0.5, 0.5)\n"
"#define from_rgb_bt601_ycoeff vec3( 0.2578125, 0.50390625, 0.09765625)\n"
"#define from_rgb_bt601_ucoeff vec3(-0.1484375,-0.28906250, 0.43750000)\n"
"#define from_rgb_bt601_vcoeff vec3( 0.4375000,-0.36718750,-0.07031250)\n"
"#define PI 3.14159265\n"
"\n"
"vec3 yuv_to_rgb (vec3 val) {\n"
" vec3 rgb;\n"
" val += from_yuv_bt601_offset;\n"
" rgb.r = dot(val, from_yuv_bt601_rcoeff);\n"
" rgb.g = dot(val, from_yuv_bt601_gcoeff);\n"
" rgb.b = dot(val, from_yuv_bt601_bcoeff);\n"
" return rgb;\n"
"}\n"
"vec3 rgb_to_yuv (vec3 val) {\n"
" vec3 yuv;\n"
" yuv.r = dot(val.rgb, from_rgb_bt601_ycoeff);\n"
" yuv.g = dot(val.rgb, from_rgb_bt601_ucoeff);\n"
" yuv.b = dot(val.rgb, from_rgb_bt601_vcoeff);\n"
" yuv += from_rgb_bt601_offset;\n"
" return yuv;\n"
"}\n"
"vec4 chroma_keying_yuv (vec4 yuva) {\n"
" float y, u, v;\n"
" y = yuva.x;\n"
" u = yuva.y-0.5;\n"
" v = yuva.z-0.5;\n"
" if (y < smin || y > smax) {\n"
" return yuva;\n"
" }\n"
" vec4 new;\n"
" float tmp, tmp1;\n"
" float x = clamp ((u * cb + v * cr) * 2.0, -0.5, 0.5);\n"
" float z = clamp ((v * cb - u * cr) * 2.0, -0.5, 0.5);\n"
" if (abs(z) > min (0.5, x * accept_angle_tg * 0.0625)) {\n"
" return yuva;\n"
" }\n"
" float x1 = min (0.5, abs(z * accept_angle_ctg * 0.0625));\n"
" float y1 = z;\n"
" tmp1 = max (0.0, x-x1);\n"
" float b_alpha = yuva.a * (1.0 - clamp (tmp1 * one_over_kc, 0.0, 1.0));\n"
" tmp = min (1.0, tmp1 * kfgy_scale * 0.0625);\n"
" new.x = max (y-tmp, 0.0);//y < tmp ? 0.0 : y - tmp;\n"
" new.y = clamp ((x1 * cb - y1 * cr) * 2.0, -0.5, 0.5)+0.5;\n"
" new.z = clamp ((y1 * cb + x1 * cr) * 2.0, -0.5, 0.5)+0.5;\n"
" new.a = z * z + (x - kg) * (x - kg) < noise_level2 ? 0.0 : b_alpha;\n"
" return new;\n"
"}\n"
"void main () {\n"
" vec4 yuva;\n"
/* operations translated from alpha and tested with glvideomixer
* with one pad's paremeters blend-equation-rgb={subtract,reverse-subtract},
* blend-function-src-rgb=src-color and blend-function-dst-rgb=dst-color */
" vec4 rgba = texture2D (tex, v_texcoord);\n"
" yuva.xyz = rgb_to_yuv (rgba.rgb);\n"
" yuva.a = rgba.a;\n"
" yuva = chroma_keying_yuv (yuva);\n"
" rgba.rgb = yuv_to_rgb (yuva.xyz);\n"
" rgba.a = yuva.a;\n"
" gl_FragColor = rgba;\n"
"}\n";
/* *INDENT-ON* */
static const gfloat cog_rgb_to_ycbcr_matrix_8bit_sdtv[] = {
0.2578125, 0.50390625, 0.09765625, 0.0625f,
-0.1484375, -0.28906250, 0.43750000, 0.5f,
0.4375000, -0.36718750, -0.07031250, 0.5f
};
static void gst_gl_alpha_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_alpha_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define gst_gl_alpha_parent_class parent_class
G_DEFINE_TYPE (GstGLAlpha, gst_gl_alpha, GST_TYPE_GL_FILTER);
static gboolean
gst_gl_alpha_is_passthrough (GstGLAlpha * glalpha)
{
return glalpha->method == ALPHA_METHOD_SET && glalpha->alpha == 1.0;
}
/* move v to be inside [from, to] by some multiple of (to-from) */
static float
wrap (float v, float from, float to)
{
float diff;
if (from > to) {
float t = to;
to = from;
from = t;
}
if (!isfinite (to) || !isfinite (from) || !isfinite (v))
return v;
diff = to - from;
while (v < from)
v += diff;
while (v > to)
v -= diff;
return v;
}
static void
gst_gl_alpha_update_properties (GstGLAlpha * glalpha)
{
GstBaseTransform *base = GST_BASE_TRANSFORM (glalpha);
gboolean current_passthrough, passthrough;
gfloat kgl;
gfloat tmp;
gfloat target_r, target_g, target_b;
gfloat target_y, target_u, target_v;
const float *matrix = cog_rgb_to_ycbcr_matrix_8bit_sdtv;
GST_OBJECT_LOCK (glalpha);
switch (glalpha->method) {
case ALPHA_METHOD_GREEN:
target_r = 0.0;
target_g = 1.0;
target_b = 0.0;
break;
case ALPHA_METHOD_BLUE:
target_r = 0.0;
target_g = 0.0;
target_b = 1.0;
break;
default:
target_r = (gfloat) glalpha->target_r / 255.0;
target_g = (gfloat) glalpha->target_g / 255.0;
target_b = (gfloat) glalpha->target_b / 255.0;
break;
}
target_y =
matrix[0] * target_r + matrix[1] * target_g + matrix[2] * target_b +
matrix[3];
/* Cb,Cr without offset here because the chroma keying
* works with them being in range [-128,127]
*/
target_u = matrix[4] * target_r + matrix[5] * target_g + matrix[6] * target_b;
target_v =
matrix[8] * target_r + matrix[9] * target_g + matrix[10] * target_b;
tmp = target_u * target_u + target_v * target_v;
kgl = sqrt (tmp);
glalpha->cb = target_u / kgl * 0.5;
glalpha->cr = target_v / kgl * 0.5;
tmp = 15 * tan (M_PI * glalpha->angle / 180);
tmp = MIN (tmp, 255);
glalpha->accept_angle_tg = tmp;
tmp = 15 / tan (M_PI * glalpha->angle / 180);
tmp = MIN (tmp, 255);
glalpha->accept_angle_ctg = tmp;
glalpha->one_over_kc = wrap (2 / kgl - 255, 0, 256);
tmp = 15 * target_y / kgl;
tmp = MIN (tmp, 255);
glalpha->kfgy_scale = tmp;
glalpha->kg = MIN (kgl, 0.5);
glalpha->noise_level2 =
glalpha->noise_level / 256.0 * glalpha->noise_level / 256.0;
GST_INFO_OBJECT (glalpha, "target yuv: %f, %f, %f, "
"kgl: %f, cb: %f, cr: %f, accept_angle_tg: %f, accept_angle_ctg: %f, "
"one_over_kc: %f, kgfy_scale: %f, kg: %f, noise level: %f",
(float) target_y, (float) target_u, (float) target_v, (float) kgl,
(float) glalpha->cb, (float) glalpha->cr,
(float) glalpha->accept_angle_tg, (float) glalpha->accept_angle_ctg,
(float) glalpha->one_over_kc, (float) glalpha->kfgy_scale,
(float) glalpha->kg, (float) glalpha->noise_level2);
passthrough = gst_gl_alpha_is_passthrough (glalpha);
GST_OBJECT_UNLOCK (glalpha);
current_passthrough = gst_base_transform_is_passthrough (base);
gst_base_transform_set_passthrough (base, passthrough);
if (current_passthrough != passthrough)
gst_base_transform_reconfigure_src (base);
}
static gboolean
_create_shader (GstGLAlpha * alpha)
{
GstGLBaseFilter *base_filter = GST_GL_BASE_FILTER (alpha);
GstGLFilter *filter = GST_GL_FILTER (alpha);
GError *error = NULL;
const gchar *frags[2];
if (alpha->alpha_shader)
gst_object_unref (alpha->alpha_shader);
frags[0] =
gst_gl_shader_string_get_highest_precision (base_filter->context,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY);
frags[1] = alpha_frag;
if (!(alpha->alpha_shader =
gst_gl_shader_new_link_with_stages (base_filter->context, &error,
gst_glsl_stage_new_default_vertex (base_filter->context),
gst_glsl_stage_new_with_strings (base_filter->context,
GL_FRAGMENT_SHADER, GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, 2,
frags), NULL))) {
GST_ELEMENT_ERROR (alpha, RESOURCE, NOT_FOUND, ("%s",
"Failed to initialize alpha shader"), ("%s",
error ? error->message : "Unknown error"));
return FALSE;
}
if (alpha->chroma_key_shader)
gst_object_unref (alpha->chroma_key_shader);
frags[1] = chroma_key_frag;
if (!(alpha->chroma_key_shader =
gst_gl_shader_new_link_with_stages (base_filter->context, &error,
gst_glsl_stage_new_default_vertex (base_filter->context),
gst_glsl_stage_new_with_strings (base_filter->context,
GL_FRAGMENT_SHADER, GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, 2,
frags), NULL))) {
GST_ELEMENT_ERROR (alpha, RESOURCE, NOT_FOUND, ("%s",
"Failed to initialize chroma key shader"), ("%s",
error ? error->message : "Unknown error"));
return FALSE;
}
filter->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (alpha->alpha_shader, "a_position");
filter->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (alpha->alpha_shader, "a_texcoord");
return TRUE;
}
static gboolean
gst_gl_alpha_gl_start (GstGLBaseFilter * base_filter)
{
GstGLAlpha *alpha = GST_GL_ALPHA (base_filter);
if (!_create_shader (alpha))
return FALSE;
return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter);
}
static void
gst_gl_alpha_gl_stop (GstGLBaseFilter * base_filter)
{
GstGLAlpha *alpha = GST_GL_ALPHA (base_filter);
if (alpha->alpha_shader)
gst_object_unref (alpha->alpha_shader);
alpha->alpha_shader = NULL;
if (alpha->chroma_key_shader)
gst_object_unref (alpha->chroma_key_shader);
alpha->chroma_key_shader = NULL;
GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter);
}
static void
gst_gl_alpha_before_transform (GstBaseTransform * base, GstBuffer * buf)
{
GstGLAlpha *alpha = GST_GL_ALPHA (base);
GstClockTime timestamp, stream_time;
timestamp = GST_BUFFER_TIMESTAMP (buf);
stream_time =
gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (alpha, "sync to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (alpha), stream_time);
}
static gboolean
gst_gl_alpha_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex,
GstGLMemory * out_tex)
{
GstGLAlpha *alpha = GST_GL_ALPHA (filter);
GstGLShader *shader;
if (!alpha->alpha_shader)
_create_shader (alpha);
GST_OBJECT_LOCK (alpha);
if (alpha->method == ALPHA_METHOD_SET) {
shader = alpha->alpha_shader;
gst_gl_shader_use (shader);
gst_gl_shader_set_uniform_1f (shader, "alpha", alpha->alpha);
} else {
shader = alpha->chroma_key_shader;
gst_gl_shader_use (shader);
gst_gl_shader_set_uniform_1f (shader, "cb", alpha->cb);
gst_gl_shader_set_uniform_1f (shader, "cr", alpha->cr);
gst_gl_shader_set_uniform_1f (shader, "kg", alpha->kg);
gst_gl_shader_set_uniform_1f (shader, "accept_angle_tg",
alpha->accept_angle_tg);
gst_gl_shader_set_uniform_1f (shader, "accept_angle_ctg",
alpha->accept_angle_ctg);
gst_gl_shader_set_uniform_1f (shader, "one_over_kc", alpha->one_over_kc);
gst_gl_shader_set_uniform_1f (shader, "kfgy_scale", alpha->kfgy_scale);
gst_gl_shader_set_uniform_1f (shader, "noise_level2", alpha->noise_level2);
gst_gl_shader_set_uniform_1f (shader, "smin",
0.5 - alpha->black_sensitivity / 255.0);
gst_gl_shader_set_uniform_1f (shader, "smax",
0.5 + alpha->white_sensitivity / 255.0);
}
GST_OBJECT_UNLOCK (alpha);
gst_gl_filter_render_to_target_with_shader (filter, in_tex, out_tex, shader);
return TRUE;
}
static void
gst_gl_alpha_class_init (GstGLAlphaClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
GstGLBaseFilterClass *base_filter_class = (GstGLBaseFilterClass *) klass;
GstGLFilterClass *filter_class = (GstGLFilterClass *) klass;
GST_DEBUG_CATEGORY_INIT (glalpha_debug, "glalpha", 0, "glalpha");
gst_gl_filter_add_rgba_pad_templates (GST_GL_FILTER_CLASS (klass));
gobject_class->set_property = gst_gl_alpha_set_property;
gobject_class->get_property = gst_gl_alpha_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_METHOD,
g_param_spec_enum ("method", "Method",
"How the alpha channels should be created", GST_TYPE_GL_ALPHA_METHOD,
DEFAULT_METHOD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ALPHA,
g_param_spec_double ("alpha", "Alpha", "The value for the alpha channel",
0.0, 1.0, DEFAULT_ALPHA,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_R,
g_param_spec_uint ("target-r", "Target Red",
"The red color value for custom RGB chroma keying", 0, 255,
DEFAULT_TARGET_R,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_G,
g_param_spec_uint ("target-g", "Target Green",
"The green color value for custom RGB chroma keying", 0, 255,
DEFAULT_TARGET_G,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TARGET_B,
g_param_spec_uint ("target-b", "Target Blue",
"The blue color value for custom RGB chroma keying", 0, 255,
DEFAULT_TARGET_B,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ANGLE,
g_param_spec_float ("angle", "Angle", "Size of the colorcube to change",
0.0, 90.0, DEFAULT_ANGLE,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_NOISE_LEVEL,
g_param_spec_float ("noise-level", "Noise Level", "Size of noise radius",
0.0, 64.0, DEFAULT_NOISE_LEVEL,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_BLACK_SENSITIVITY, g_param_spec_uint ("black-sensitivity",
"Black Sensitivity", "Sensitivity to dark colors", 0, 128,
DEFAULT_BLACK_SENSITIVITY,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_WHITE_SENSITIVITY, g_param_spec_uint ("white-sensitivity",
"White Sensitivity", "Sensitivity to bright colors", 0, 128,
DEFAULT_WHITE_SENSITIVITY,
G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"OpenGL Alpha Filter", "Filter/Effect/Video",
"Adds an alpha channel to video using OpenGL - uniform or chroma-keying",
"Matthew Waters <matthew@centricular.com>");
trans_class->before_transform =
GST_DEBUG_FUNCPTR (gst_gl_alpha_before_transform);
trans_class->transform_ip_on_passthrough = FALSE;
base_filter_class->gl_start = GST_DEBUG_FUNCPTR (gst_gl_alpha_gl_start);
base_filter_class->gl_stop = GST_DEBUG_FUNCPTR (gst_gl_alpha_gl_stop);
filter_class->filter_texture =
GST_DEBUG_FUNCPTR (gst_gl_alpha_filter_texture);
}
static void
gst_gl_alpha_init (GstGLAlpha * alpha)
{
alpha->alpha = DEFAULT_ALPHA;
alpha->method = DEFAULT_METHOD;
alpha->target_r = DEFAULT_TARGET_R;
alpha->target_g = DEFAULT_TARGET_G;
alpha->target_b = DEFAULT_TARGET_B;
alpha->angle = DEFAULT_ANGLE;
alpha->noise_level = DEFAULT_NOISE_LEVEL;
alpha->black_sensitivity = DEFAULT_BLACK_SENSITIVITY;
alpha->white_sensitivity = DEFAULT_WHITE_SENSITIVITY;
gst_gl_alpha_update_properties (alpha);
}
static void
gst_gl_alpha_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLAlpha *alpha = GST_GL_ALPHA (object);
GST_OBJECT_LOCK (alpha);
switch (prop_id) {
case PROP_METHOD:{
alpha->method = g_value_get_enum (value);
break;
}
case PROP_ALPHA:{
alpha->alpha = g_value_get_double (value);
break;
}
case PROP_TARGET_R:
alpha->target_r = g_value_get_uint (value);
break;
case PROP_TARGET_G:
alpha->target_g = g_value_get_uint (value);
break;
case PROP_TARGET_B:
alpha->target_b = g_value_get_uint (value);
break;
case PROP_ANGLE:
alpha->angle = g_value_get_float (value);
break;
case PROP_NOISE_LEVEL:
alpha->noise_level = g_value_get_float (value);
break;
case PROP_BLACK_SENSITIVITY:
alpha->black_sensitivity = g_value_get_uint (value);
break;
case PROP_WHITE_SENSITIVITY:
alpha->white_sensitivity = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (alpha);
gst_gl_alpha_update_properties (alpha);
}
static void
gst_gl_alpha_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLAlpha *alpha = GST_GL_ALPHA (object);
switch (prop_id) {
case PROP_METHOD:
g_value_set_enum (value, alpha->method);
break;
case PROP_ALPHA:
g_value_set_double (value, alpha->alpha);
break;
case PROP_TARGET_R:
g_value_set_uint (value, alpha->target_r);
break;
case PROP_TARGET_G:
g_value_set_uint (value, alpha->target_g);
break;
case PROP_TARGET_B:
g_value_set_uint (value, alpha->target_b);
break;
case PROP_ANGLE:
g_value_set_float (value, alpha->angle);
break;
case PROP_NOISE_LEVEL:
g_value_set_float (value, alpha->noise_level);
break;
case PROP_BLACK_SENSITIVITY:
g_value_set_uint (value, alpha->black_sensitivity);
break;
case PROP_WHITE_SENSITIVITY:
g_value_set_uint (value, alpha->white_sensitivity);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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