#include <stdio.h>#include <stdlib.h>#include <stdarg.h>#include "camserv.h"#include "camconfig.h"#include "video.h"#include "filter.h"#include "log.h"#define MODNAME "randfilter"typedef struct rand_filter_st {  int colored_pixels;  int num_perline;} RandFilter;/* * filter_init:  Standard filter initialization routine. * * Filter variables:  randmod_perline = max # of random pixels per line *                    randmod_colordpix = Use colored pixels */void *filter_init( CamConfig *ccfg, char *section_name ){  RandFilter *res;  if( (res = malloc( sizeof( *res ))) == NULL ){    camserv_log( MODNAME, 		 "FATAL!  Could not allocate space for random filter!" );    return NULL;  }  res->num_perline = camconfig_query_def_int( ccfg, section_name,					      "num_perline", 20 );  res->colored_pixels = camconfig_query_def_int( ccfg, section_name,						 "coloredpix",1);  return res;}/* * filter_deinit:  Standard filter deinit routine  */void filter_deinit( void *filter_dat ){  RandFilter *rfilt = filter_dat;  free( rfilt );}void filter_func( char *in_data, char **out_data, void *cldat, 		  const Video_Info *vinfo_in, Video_Info *vinfo_out ){  RandFilter *rfilt = cldat;  int rowspan, i, j, randval;  unsigned char *cp, *outp;  *vinfo_out = *vinfo_in;  *out_data = in_data;  if( vinfo_in->is_black_white ) { /* UNTESTED */    rowspan = vinfo_in->width;        for( i=0, cp = in_data; i< vinfo_in->height; i++, cp += rowspan ) {      randval = random() % 100;      for( j=0; j< randval; j++ ){	outp = cp + (random() % vinfo_in->width );	*outp = random() % 256;      }    }  } else {    /* Pick random spots per line */    rowspan = vinfo_in->width * 3;    for( i=0, cp = in_data; i< vinfo_in->height; i++, cp += rowspan ){      randval = random() % rfilt->num_perline;      if( rfilt->colored_pixels ) {	for( j=0; j< randval; j++ ){	  outp = cp + 3*(random() % vinfo_in->width );	  *(outp + 0) = random() % 255;	  *(outp + 1) = random() % 255;	  *(outp + 2) = random() % 255;	}      } else {	for( j=0; j< randval; j++ ){	  outp = cp + 3*(random() % vinfo_in->width );	  *(outp + 0) = 255 - *(outp + 0 );	  *(outp + 1) = 255 - *(outp + 1 );	  *(outp + 2) = 255 - *(outp + 2 );	}      }    }  }}void filter_validation(){  Filter_Init_Func init = filter_init;  Filter_Deinit_Func deinit = filter_deinit;  Filter_Func_Func func = filter_func;  if( init != NULL && deinit != NULL && func != NULL ) return;}/* * modinfo_query:  Routine to return information about the variables *                 accessed by this particular module. * * Return values:  Returns a malloced ModInfo structure, for which *                 the caller must free, or NULL on failure. */ModInfo *modinfo_query(){  ModInfo *res;  if( (res = modinfo_create( 2 )) == NULL )    return NULL;  modinfo_varname_set( res, 0, "num_perline" );  modinfo_desc_set( res, 0, "Maximum number of speckles per line" );  res->vars[ 0 ].type = MODINFO_TYPE_INT;  modinfo_varname_set( res, 1, "coloredpix" );  modinfo_desc_set( res, 1, "Enable colored pixels (1==on, 0==off)");  res->vars[ 1 ].type = MODINFO_TYPE_INT;  return res;}