research.m1stereo.tv/gitweb/ - melted/blob - src/modules/oldfilm/filter_oldfilm.c

   1 /*
   2  * filter_oldfilm.c -- oldfilm 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
  28 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  29 {
  30
  31         mlt_filter filter = mlt_frame_pop_service( this );
  32         int error = mlt_frame_get_image( this, image, format, width, height, 1 );
  33
  34         if (  error == 0 && *image && *format == mlt_image_yuv422 )
  35         {
  36                 int h = *height;
  37                 int w = *width;
  38
  39                 int x=0;
  40                 int y=0;
  41
  42                 mlt_position in = mlt_filter_get_in( filter );
  43                 mlt_position out = mlt_filter_get_out( filter );
  44                 mlt_position time = mlt_frame_get_position( this );
  45                 double position = ( double )( time - in ) / ( double )( out - in + 1 );
  46                 srand(position*10000);
  47
  48                 int delta = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "delta" );
  49                 int every = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "every" );
  50
  51                 int bdu = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_up" );
  52                 int bdd = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_down" );
  53                 int bevery = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "brightnessdelta_every" );
  54
  55                 int diffpic=0;
  56                 if (delta)
  57                         diffpic=rand()%delta*2-delta;
  58
  59                 int brightdelta=0;
  60                 if ((bdu+bdd)!=0)
  61                          brightdelta=rand()%(bdu+bdd)-bdd;
  62                 if (rand()%100>every)
  63                         diffpic=0;
  64                 if (rand()%100>bevery)
  65                         brightdelta=0;
  66                 int yend,ydiff;
  67                 if (diffpic<=0){
  68                         y=h;
  69                         yend=0;
  70                         ydiff=-1;
  71                 }else{
  72                         y=0;
  73                         yend=h;
  74                         ydiff=1;
  75                 }
  76
  77                 while(y!=yend){
  78                         //int newy=y+diffpic;
  79                         for (x=0;x<w;x++){
  80                                         uint8_t* pic=(*image+y*w*2+x*2);
  81                                         int newy=y+diffpic;
  82                                         if (newy>0 && newy<h ){
  83                                                 uint8_t oldval=*(pic+diffpic*w*2);
  84                                                 /* frame around
  85                                                 int randx=(x<=frameborder)?x:(x+frameborder>w)?w-x:-1;
  86                                                 int randy=((newy)<=frameborder)?(newy):((newy)+frameborder>h)?h-(y+diffpic):-1;
  87                                                 if (randx>=0 ){
  88                                                         oldval=oldval*pow(((double)randx/(double)frameborder),1.5);
  89                                                 }
  90                                                 if (randy>=0 ){
  91                                                         oldval=oldval*pow(((double)randy/(double)frameborder),1.5);
  92                                                 }
  93                                                 if (randx>=0 && randy>=0){
  94                                                         //oldval=oldval*(randx*randy)/500.0;
  95                                                 }
  96                                                 */
  97                                                 if ( ((int) oldval + brightdelta ) >255)
  98                                                         *pic=255;
  99                                                 else if ( ( (int) oldval+brightdelta )  <0){
 100                                                         *pic=0;
 101                                                 }else
 102                                                         *pic=oldval+brightdelta;
 103                                                 *(pic+1)=*(pic+diffpic*w*2+1);
 104
 105                                         }else{
 106                                                 *pic=0;
 107                                                 //*(pic-1)=127;
 108                                         }
 109
 110                         }
 111                         y+=ydiff;
 112                 }
 113         }
 114
 115         return error;
 116 }
 117
 118 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 119 {
 120
 121         mlt_frame_push_service( frame, this );
 122         mlt_frame_push_get_image( frame, filter_get_image );
 123         return frame;
 124 }
 125
 126 mlt_filter filter_oldfilm_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
 127 {
 128         mlt_filter this = mlt_filter_new( );
 129         if ( this != NULL )
 130         {
 131                 this->process = filter_process;
 132                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "delta", "14" );
 133                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "every", "20" );
 134                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_up" , "20" );
 135                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_down" , "30" );
 136                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "brightnessdelta_every" , "70" );
 137         }
 138         return this;
 139 }
 140