2 * filter_oldfilm.c -- oldfilm 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>
28 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
31 mlt_filter filter = mlt_frame_pop_service( this );
32 *format = mlt_image_yuv422;
33 int error = mlt_frame_get_image( this, image, format, width, height, 1 );
35 if ( error == 0 && *image )
43 mlt_position in = mlt_filter_get_in( filter );
44 mlt_position out = mlt_filter_get_out( filter );
45 mlt_position time = mlt_frame_get_position( this );
46 double position = ( double )( time - in ) / ( double )( out - in + 1 );
47 srand(position*10000);
49 int delta = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "delta" );
50 int every = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "every" );
52 int bdu = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_up" );
53 int bdd = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_down" );
54 int bevery = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_every" );
58 diffpic=rand()%delta*2-delta;
62 brightdelta=rand()%(bdu+bdd)-bdd;
65 if (rand()%100>bevery)
81 uint8_t* pic=(*image+y*w*2+x*2);
83 if (newy>0 && newy<h ){
84 uint8_t oldval=*(pic+diffpic*w*2);
86 int randx=(x<=frameborder)?x:(x+frameborder>w)?w-x:-1;
87 int randy=((newy)<=frameborder)?(newy):((newy)+frameborder>h)?h-(y+diffpic):-1;
89 oldval=oldval*pow(((double)randx/(double)frameborder),1.5);
92 oldval=oldval*pow(((double)randy/(double)frameborder),1.5);
94 if (randx>=0 && randy>=0){
95 //oldval=oldval*(randx*randy)/500.0;
98 if ( ((int) oldval + brightdelta ) >255)
100 else if ( ( (int) oldval+brightdelta ) <0){
103 *pic=oldval+brightdelta;
104 *(pic+1)=*(pic+diffpic*w*2+1);
119 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
122 mlt_frame_push_service( frame, this );
123 mlt_frame_push_get_image( frame, filter_get_image );
127 mlt_filter filter_oldfilm_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
129 mlt_filter this = mlt_filter_new( );
132 this->process = filter_process;
133 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "delta", "14" );
134 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "every", "20" );
135 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_up" , "20" );
136 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_down" , "30" );
137 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_every" , "70" );