git.sesse.net Git - mlt/blob - src/modules/oldfilm/filter_lines.c

   1 /*
   2  * filter_lines.c -- lines filter
   3  * Copyright (c) 2007 Marco Gittler <g.marco@freenet.de>
   4  *
   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.
   9  *
  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.
  14  *
  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
  18  */
  19
  20 #include <framework/mlt_filter.h>
  21 #include <framework/mlt_frame.h>
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <math.h>
  26
  27 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  28 {
  29
  30         mlt_filter filter = mlt_frame_pop_service( this );
  31         *format = mlt_image_yuv422;
  32         int error = mlt_frame_get_image( this, image, format, width, height, 1 );
  33
  34         if ( error == 0 && *image )
  35         {
  36                 int h = *height;
  37                 int w = *width;
  38
  39                 int width_line = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "width" );
  40                 int num = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "num" );
  41                 double maxdarker= (double)mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "darker" ) ;
  42                 double maxlighter=(double)mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "lighter" ) ;
  43                 //int frame = mlt_properties_get_int( this, "_position" );
  44                 char buf[256];
  45                 char typebuf[256];
  46
  47                 mlt_position in = mlt_filter_get_in( filter );
  48                 mlt_position out = mlt_filter_get_out( filter );
  49                 mlt_position time = mlt_frame_get_position( this );
  50                 double position = ( double )( time - in ) / ( double )( out - in + 1 );
  51                 srand(position*10000);
  52                 if (!width_line)
  53                         return 0;
  54
  55                 mlt_service_lock( MLT_FILTER_SERVICE( filter ) );
  56
  57                 while (num--){
  58                         int type=(rand()%3)+1;
  59                         int x1=(double)w*rand()/RAND_MAX;
  60                         int dx=rand()%width_line;
  61                         int x=0,y=0;
  62                         int ystart=rand()%h;
  63                         int yend=rand()%h;
  64
  65                         sprintf(buf,"line%d",num);
  66                         sprintf(typebuf,"typeline%d",num);
  67                         maxlighter+=rand()%30-15;
  68                         maxdarker+=rand()%30-15;
  69
  70                         if (mlt_properties_get_int(MLT_FILTER_PROPERTIES( filter ),buf)==0){
  71                                 mlt_properties_set_int(MLT_FILTER_PROPERTIES( filter ),buf,x1);
  72                         }
  73
  74                         if (mlt_properties_get_int(MLT_FILTER_PROPERTIES( filter ),typebuf)==0 ){
  75                                 mlt_properties_set_int(MLT_FILTER_PROPERTIES( filter ),typebuf,type);
  76                         }
  77
  78
  79                         x1=mlt_properties_get_int(MLT_FILTER_PROPERTIES( filter ),buf);
  80                         type=mlt_properties_get_int(MLT_FILTER_PROPERTIES( filter ),typebuf);
  81                         if (position!=mlt_properties_get_double(MLT_FILTER_PROPERTIES( filter ),"last_oldfilm_line_pos")){
  82                                 x1+=(rand()%11-5);
  83                         }
  84
  85                         if (yend<ystart){
  86                                 yend=h;
  87                         }
  88
  89                         for (x = -dx ; x < dx && dx != 0 ; x++ )
  90                                 for(y=ystart;y<yend;y++)
  91                                         if (x+x1<w && x+x1>0){
  92                                                 uint8_t* pixel=(*image+(y)*w*2+(x+x1)*2);
  93                                                 double diff=1.0-fabs(x)/dx;
  94                                                 switch(type){
  95                                                         case 1: //blackline
  96                                                                 *pixel-=((double)*pixel*diff*maxdarker/100.0);
  97                                                                 break;
  98                                                         case 2: //whiteline
  99                                                                 *pixel+=((255.0-(double)*pixel)*diff*maxlighter/100.0);
 100                                                                 break;
 101                                                         case 3: //greenline
 102                                                                 *(pixel+1)-=((*(pixel+1))*diff*maxlighter/100.0);
 103                                                         break;
 104                                                 }
 105
 106                                 }
 107                         mlt_properties_set_int(MLT_FILTER_PROPERTIES( filter ),buf,x1);
 108                 }
 109                 mlt_properties_set_double(MLT_FILTER_PROPERTIES( filter ),"last_oldfilm_line_pos",position);
 110                 mlt_service_unlock( MLT_FILTER_SERVICE( filter ) );
 111         }
 112
 113         return error;
 114 }
 115
 116 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 117 {
 118
 119         mlt_frame_push_service( frame, this );
 120         mlt_frame_push_get_image( frame, filter_get_image );
 121         return frame;
 122 }
 123
 124 mlt_filter filter_lines_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 125 {
 126         mlt_filter this = mlt_filter_new( );
 127         if ( this != NULL )
 128         {
 129                 this->process = filter_process;
 130                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "width", "2" );
 131                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "num", "5" );
 132                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "darker" , 40 ) ;
 133                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( this ), "lighter" , 40 ) ;
 134         }
 135         return this;
 136 }
 137
 138