1 /*****************************************************************************
2 * colorthres.c: Theshold color based on similarity to reference color
3 *****************************************************************************
4 * Copyright (C) 2000-2006 the VideoLAN team
7 * Authors: Sigmund Augdal <dnumgis@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
38 #include "vlc_filter.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static picture_t *Filter( filter_t *, picture_t * );
48 /*****************************************************************************
50 *****************************************************************************/
51 #define COLOR_TEXT N_("Color")
52 #define COLOR_LONGTEXT N_("Colors similar to this will be kept, others will be "\
53 "grayscaled. This must be an hexadecimal (like HTML colors). The first two "\
54 "chars are for red, then green, then blue. #000000 = black, #FF0000 = red,"\
55 " #00FF00 = green, #FFFF00 = yellow (red + green), #FFFFFF = white" )
56 static int pi_color_values[] = {
57 0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x0000FF00, 0x000000FF, 0x0000FFFF };
59 static const char *ppsz_color_descriptions[] = {
60 N_("Red"), N_("Fuchsia"), N_("Yellow"), N_("Lime"), N_("Blue"), N_("Aqua") };
62 #define CFG_PREFIX "colorthres-"
65 set_description( _("Color threshold filter") );
66 set_shortname( _("Color threshold" ));
67 set_category( CAT_VIDEO );
68 set_subcategory( SUBCAT_VIDEO_VFILTER );
69 set_capability( "video filter2", 0 );
70 add_integer( CFG_PREFIX "color", 0x00FF0000, NULL, COLOR_TEXT,
71 COLOR_LONGTEXT, false );
72 change_integer_list( pi_color_values, ppsz_color_descriptions, 0 );
73 add_integer( CFG_PREFIX "saturationthres", 20, NULL,
74 _("Saturaton threshold"), "", false );
75 add_integer( CFG_PREFIX "similaritythres", 15, NULL,
76 _("Similarity threshold"), "", false );
77 set_callbacks( Create, Destroy );
80 static const char *ppsz_filter_options[] = {
81 "color", "saturationthes", "similaritythres", NULL
84 /*****************************************************************************
85 * filter_sys_t: adjust filter method descriptor
86 *****************************************************************************/
91 /*****************************************************************************
92 * Create: allocates adjust video thread output method
93 *****************************************************************************
94 * This function allocates and initializes a adjust vout method.
95 *****************************************************************************/
96 static int Create( vlc_object_t *p_this )
98 filter_t *p_filter = (filter_t *)p_this;
100 /* XXX: we might need to add/remove some FOURCCs ... */
101 if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','0')
102 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','Y','U','V')
103 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('J','4','2','0')
104 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','V','1','2')
106 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','2')
107 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('J','4','2','2') )
109 msg_Err( p_filter, "Unsupported input chroma (%4s)",
110 (char*)&(p_filter->fmt_in.video.i_chroma) );
114 if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
116 msg_Err( p_filter, "Input and output chromas don't match" );
120 config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
122 var_CreateGetIntegerCommand( p_filter, CFG_PREFIX "color" );
123 var_CreateGetIntegerCommand( p_filter, CFG_PREFIX "similaritythres" );
124 var_CreateGetIntegerCommand( p_filter, CFG_PREFIX "saturationthres" );
126 /* Allocate structure */
127 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
128 if( p_filter->p_sys == NULL )
130 msg_Err( p_filter, "out of memory" );
134 p_filter->pf_video_filter = Filter;
139 /*****************************************************************************
140 * Destroy: destroy adjust video thread output method
141 *****************************************************************************
142 * Terminate an output method created by adjustCreateOutputMethod
143 *****************************************************************************/
144 static void Destroy( vlc_object_t *p_this )
146 filter_t *p_filter = (filter_t *)p_this;
147 free( p_filter->p_sys );
150 /*****************************************************************************
151 * Render: displays previously rendered output
152 *****************************************************************************
153 * This function send the currently rendered image to adjust modified image,
154 * waits until it is displayed and switch the two rendering buffers, preparing
156 *****************************************************************************/
157 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
160 uint8_t *p_in_y, *p_in_u, *p_in_v, *p_in_end_u;
161 uint8_t *p_out_y, *p_out_u, *p_out_v;
162 int i_simthres = var_GetInteger( p_filter, "colorthres-similaritythres" );
163 int i_satthres = var_GetInteger( p_filter, "colorthres-saturationthres" );
164 int i_color = var_GetInteger( p_filter, "colorthres-color" );
166 if( !p_pic ) return NULL;
168 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
171 msg_Warn( p_filter, "can't get output picture" );
172 if( p_pic->pf_release )
173 p_pic->pf_release( p_pic );
177 p_in_u = p_pic->p[U_PLANE].p_pixels;
178 p_in_v = p_pic->p[V_PLANE].p_pixels;
179 p_in_y = p_pic->p[Y_PLANE].p_pixels;
180 p_in_end_u = p_in_u + p_pic->p[U_PLANE].i_visible_lines
181 * p_pic->p[U_PLANE].i_pitch - 8;
183 p_out_y = p_outpic->p[Y_PLANE].p_pixels;
184 p_out_u = p_outpic->p[U_PLANE].p_pixels;
185 p_out_v = p_outpic->p[V_PLANE].p_pixels;
187 /* Create grayscale version of input */
189 pf_memcpy( p_out_y, p_in_y, p_pic->p[Y_PLANE].i_visible_lines
190 * p_pic->p[Y_PLANE].i_pitch - 8 );
192 pf_memset( p_out_u, 0x80, p_pic->p[U_PLANE].i_visible_lines
193 * p_pic->p[U_PLANE].i_pitch - 8 );
195 pf_memset( p_out_v, 0x80, p_pic->p[U_PLANE].i_visible_lines
196 * p_pic->p[U_PLANE].i_pitch - 8 );
199 * Do the U and V planes
201 int i_red = ( i_color & 0xFF0000 ) >> 16;
202 int i_green = ( i_color & 0xFF00 ) >> 8;
203 int i_blue = i_color & 0xFF;
204 int i_u = (int8_t)(( -38 * i_red - 74 * i_green +
205 112 * i_blue + 128) >> 8) + 128;
206 int i_v = (int8_t)(( 112 * i_red - 94 * i_green -
207 18 * i_blue + 128) >> 8) + 128;
208 int refu = i_u - 0x80; /*bright red*/
209 int refv = i_v - 0x80;
210 int reflength = sqrt(refu*refu+refv*refv);
212 while( p_in_u < p_in_end_u ) {
213 /* Length of color vector */
214 int inu = (*p_in_u) - 0x80;
215 int inv = (*p_in_v) - 0x80;
216 int length = sqrt(inu*inu+inv*inv);
218 int diffu = refu * length - inu *reflength;
219 int diffv = refv * length - inv *reflength;
220 long long int difflen2=diffu*diffu;
221 difflen2 +=diffv*diffv;
222 long long int thres = length*reflength;
224 if( length > i_satthres && (difflen2*i_simthres< thres ) ) {
227 // fprintf(stderr,"keeping color %d %d\n", length, difflen2);
235 p_outpic->date = p_pic->date;
236 p_outpic->b_force = p_pic->b_force;
237 p_outpic->i_nb_fields = p_pic->i_nb_fields;
238 p_outpic->b_progressive = p_pic->b_progressive;
239 p_outpic->b_top_field_first = p_pic->b_top_field_first;
241 if( p_pic->pf_release )
242 p_pic->pf_release( p_pic );