From 5867bb8f12f3841a06eed3cd253365be0728c0af Mon Sep 17 00:00:00 2001
From: Nathanael Sensfelder <SpamShield0@MultiAgentSystems.org>
Date: Thu, 3 Sep 2015 05:11:31 +0200
Subject: Now applies the 'fuzz' and 'flat' properties.

---
 src/config.c | 24 ++++++++++++++++++++++--
 src/config.h |  7 +++++--
 src/main.c   |  4 ++--
 3 files changed, 29 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/config.c b/src/config.c
index d4288ef..e84737a 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1,5 +1,6 @@
 #include <errno.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "error.h"
 #include "pervasive.h"
@@ -136,6 +137,7 @@ static int parse_axis_configuration_line
    errno = prev_errno;
 
    conf->axis[axis].enabled = 1;
+   conf->axis[axis].previous_value = 0;
 
    return 0;
 }
@@ -314,7 +316,7 @@ int relabsd_config_parse
 
 int relabsd_config_filter
 (
-   const struct relabsd_config * const conf,
+   struct relabsd_config * const conf,
    enum relabsd_axis const axis,
    int * const value
 )
@@ -324,6 +326,13 @@ int relabsd_config_filter
       return 0;
    }
 
+   if (abs(*value - conf->axis[axis].previous_value) <= conf->axis[axis].fuzz)
+   {
+      conf->axis[axis].previous_value = *value;
+
+      return -1;
+   }
+
    if (*value < conf->axis[axis].min)
    {
       *value = conf->axis[axis].min;
@@ -332,8 +341,19 @@ int relabsd_config_filter
    {
       *value = conf->axis[axis].max;
    }
+   else if (abs(*value) <= conf->axis[axis].flat)
+   {
+      *value = 0;
+
+      /*
+       * As long as the 'fuzz' test is done prior the 'flat' one, moving around
+       * in the 'flat' zone won't trigger useless '0' value events.
+       */
+   }
+
+   /* TODO: handle conf->axis[axis].resolution */
 
-   /* TODO: handle the other properties. */
+   conf->axis[axis].previous_value = *value;
 
    return 1;
 }
diff --git a/src/config.h b/src/config.h
index 1ede1f3..c0c83a7 100644
--- a/src/config.h
+++ b/src/config.h
@@ -8,6 +8,7 @@
 struct relabsd_config_axis
 {
    int enabled;
+   int previous_value;
    int min;
    int max;
    int fuzz;
@@ -54,11 +55,13 @@ int relabsd_config_parse
  *
  * If the return value is 0, this function will not have altered the value at
  * 'value'. Otherwise, this function can have altered it to match its
- * requierements.
+ * requirements.
+ * If the return value is either 0 or -1, the 'previous_value' of the axis
+ * has been updated.
  */
 int relabsd_config_filter
 (
-   const struct relabsd_config * const conf,
+   struct relabsd_config * const conf,
    enum relabsd_axis const axis,
    int * const value
 );
diff --git a/src/main.c b/src/main.c
index 9eb3433..47b78a2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,7 +21,7 @@ static void interrupt (int unused_mandatory_parameter)
 
 static void handle_relative_axis_event
 (
-   const struct relabsd_config * const conf,
+   struct relabsd_config * const conf,
    const struct relabsd_device * const dev,
    unsigned int const input_type,
    unsigned int const input_code,
@@ -53,7 +53,7 @@ static void handle_relative_axis_event
 
 static void convert_input
 (
-   const struct relabsd_config * const conf,
+   struct relabsd_config * const conf,
    const struct relabsd_input * const input,
    const struct relabsd_device * const dev
 )
-- 
cgit v1.2.3-70-g09d2