drivers/input/touchscreen/ts_filter_median.h

   1 #ifndef __TS_FILTER_MEDIAN_H__
   2 #define __TS_FILTER_MEDIAN_H__
   3
   4 #include "ts_filter.h"
   5
   6 /*
   7  * Touchscreen filter.
   8  *
   9  * median
  10  *
  11  * (c) 2008 Andy Green <andy@openmoko.com>
  12  */
  13
  14 struct ts_filter_median_configuration {
  15         int extent;
  16         int midpoint;
  17         int decimation_threshold;
  18         int decimation_above;
  19         int decimation_below;
  20 };
  21
  22 struct ts_filter_median {
  23         struct ts_filter tsf;
  24         struct ts_filter_median_configuration *config;
  25
  26         int decimation_count;
  27         int last_issued[MAX_TS_FILTER_COORDS];
  28         int valid; /* how many samples in the sort buffer are valid */
  29         int *sort[MAX_TS_FILTER_COORDS]; /* samples taken for median */
  30         int *fifo[MAX_TS_FILTER_COORDS]; /* samples taken for median */
  31         int pos; /* where we are in the fifo sample memory */
  32 };
  33
  34 extern struct ts_filter_api ts_filter_median_api;
  35
  36 #endif