2 * filter_tcolor.c -- tcolor filter
3 * Copyright (c) 2007 Marco Gittler <g.marco@freenet.de>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library 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 GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <framework/mlt_filter.h>
21 #include <framework/mlt_frame.h>
27 #define MIN(a,b) (a<b?a:b)
28 #define MAX(a,b) (a<b?b:a)
30 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
33 mlt_filter filter = mlt_frame_pop_service( this );
34 *format = mlt_image_yuv422;
35 int error = mlt_frame_get_image( this, image, format, width, height, 1 );
37 if ( error == 0 && *image )
40 double over_cr = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "oversaturate_cr" )/100.0;
41 double over_cb = mlt_properties_get_double( MLT_FILTER_PROPERTIES( filter ), "oversaturate_cb" )/100.0;
43 int video_width = *width;
44 int video_height = *height;
48 for (y=0;y<video_height;y++){
49 for (x=0;x<video_width;x+=2){
50 uint8_t *pix=(*image+y*video_width*2+x*2+1);
51 uint8_t *pix1=(*image+y*video_width*2+x*2+3);
52 *pix=MIN(MAX( ((double)*pix-127.0)*over_cb+127.0,0),255);
53 *pix1=MIN(MAX( ((double)*pix1-127.0)*over_cr+127.0,0),255);
56 // short a, short b, short c, short d
58 // b: +=blue, -=yellow
66 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
68 mlt_frame_push_service( frame, this );
69 mlt_frame_push_get_image( frame, filter_get_image );
74 mlt_filter filter_tcolor_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
76 mlt_filter this = mlt_filter_new( );
79 this->process = filter_process;
80 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "oversaturate_cr", "190" );
81 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "oversaturate_cb", "190" );