]> git.sesse.net Git - mlt/blob - src/modules/opengl/filter_movit_white_balance.cpp
Rename some Movit filter filenames, for consistency.
[mlt] / src / modules / opengl / filter_movit_white_balance.cpp
1 /*
2  * filter_white_balance.cpp
3  * Copyright (C) 2013 Dan Dennedy <dan@dennedy.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software Foundation,
17  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20 #include <framework/mlt.h>
21 #include <string.h>
22 #include <math.h>
23 #include <assert.h>
24
25 #include "filter_glsl_manager.h"
26 #include <movit/white_balance_effect.h>
27
28 static double srgb8_to_linear(int c)
29 {
30         double x = c / 255.0f;
31         if (x < 0.04045f) {
32                 return (1.0/12.92f) * x;
33         } else {
34                 return pow((x + 0.055) * (1.0/1.055f), 2.4);
35         }
36 }
37
38 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
39 {
40         mlt_filter filter = (mlt_filter) mlt_frame_pop_service( frame );
41         mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
42         GlslManager::get_instance()->lock_service( frame );
43         Effect* effect = GlslManager::get_effect( MLT_FILTER_SERVICE( filter ), frame );
44         if ( effect ) {
45                 mlt_position position = mlt_filter_get_position( filter, frame );
46                 mlt_position length = mlt_filter_get_length2( filter, frame );
47                 int color_int = mlt_properties_anim_get_int( properties, "neutral_color", position, length );
48                 RGBTriplet color(
49                         srgb8_to_linear((color_int >> 24) & 0xff),
50                         srgb8_to_linear((color_int >> 16) & 0xff),
51                         srgb8_to_linear((color_int >> 8) & 0xff)
52                 );
53                 bool ok = effect->set_vec3( "neutral_color", (float*) &color );
54                 ok |= effect->set_float( "output_color_temperature",
55                         mlt_properties_anim_get_double( properties, "color_temperature", position, length ) );
56                 assert(ok);
57         }
58         GlslManager::get_instance()->unlock_service( frame );
59         *format = mlt_image_glsl;
60         return mlt_frame_get_image( frame, image, format, width, height, writable );
61 }
62
63 static mlt_frame process( mlt_filter filter, mlt_frame frame )
64 {
65         if ( !mlt_frame_is_test_card( frame ) ) {
66                 if ( !GlslManager::get_effect( MLT_FILTER_SERVICE( filter ), frame ) )
67                         GlslManager::add_effect( MLT_FILTER_SERVICE( filter ), frame, new WhiteBalanceEffect );
68         }
69         mlt_frame_push_service( frame, filter );
70         mlt_frame_push_get_image( frame, get_image );
71         return frame;
72 }
73
74 extern "C" {
75
76 mlt_filter filter_white_balance_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
77 {
78         mlt_filter filter = NULL;
79         GlslManager* glsl = GlslManager::get_instance();
80
81         if ( glsl && ( filter = mlt_filter_new() ) ) {
82                 mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
83                 mlt_properties_set( properties, "neutral_color", arg? arg : "#7f7f7f" );
84                 mlt_properties_set_double( properties, "color_temperature", 6500.0 );
85                 filter->process = process;
86         }
87         return filter;
88 }
89
90 }