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 "filter_lines.h"
  21
  22 #include <framework/mlt_frame.h>
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <math.h>
  27
  28
  29 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
  30 {
  31
  32         mlt_filter filter = mlt_frame_pop_service( this );
  33         int error = mlt_frame_get_image( this, image, format, width, height, 1 );
  34
  35         if ( error == 0 && *image && *format == mlt_image_yuv422 )
  36         {
  37                 int h = *height;
  38                 int w = *width;
  39
  40                 int width = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "width" );
  41                 int num = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "num" );
  42                 //int frame = mlt_properties_get_int( this, "_position" );
  43                 char buf[1024];
  44
  45                 while (num--){
  46                         sprintf(buf,"line%d",num);
  47
  48                         int type=rand()%2;
  49                         int x1=rand()%w;;
  50                         int dx=rand()%width;
  51                         /*int xx=mlt_properties_get_int(MLT_PRODUCER_PROPERTIES(mlt_frame_get_original_producer( this ),buf);
  52                         if (xx==0){
  53                                 mlt_properties_set_int(this,buf,x1);
  54                                 //x1=100;
  55                         }
  56                         x1=mlt_properties_get_int(this,buf)+5;
  57                         */
  58                         int x=0,y=0,pix=0;
  59                         for (x=-dx;x<dx;x++)
  60                                 for(y=0;y<h;y++)
  61                                         if (x+x1<w && x+x1>0){
  62                                                 uint8_t* pixel=(*image+(y)*w*2+(x+x1)*2);
  63                                                 switch(type){
  64                                                         case 0:
  65                                                                 pix=(*pixel)*abs(x)/dx;
  66                                                                 *pixel=pix;
  67                                                                 break;
  68                                                         case 1:
  69                                                                 pix=(*pixel)+((255-*pixel)*abs(x)/dx);
  70                                                                 *pixel=pix;
  71                                                                 break;
  72                                                 }
  73
  74                                 }
  75                 }
  76         }
  77
  78         return error;
  79 }
  80
  81 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
  82 {
  83
  84         mlt_frame_push_service( frame, this );
  85         mlt_frame_push_get_image( frame, filter_get_image );
  86         return frame;
  87 }
  88
  89 mlt_filter filter_lines_init( char *arg )
  90 {
  91         mlt_filter this = mlt_filter_new( );
  92         if ( this != NULL )
  93         {
  94                 this->process = filter_process;
  95                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "width", "2" );
  96                 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "num", "5" );
  97         }
  98         return this;
  99 }
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