Minor fixes following up review

use CLAMP in colordistance

keep MY_MAX_RAND in rgbnoise

code cleanup from old experiments

leaner free section in water

Co-authored-by: Dan Dennedy <dan@dennedy.org>

src/filter/colordistance/colordistance.c

@@ -135,8 +135,7 @@ void f0r_update(f0r_instance_t instance, double time,
 		l = (int)rint( sqrtf( powf( r1 - r2, 2 ) + powf( g1 - g2, 2 ) + powf( b1 - b2, 2 ) ) * SCALE_FACTOR );
 
 		// Clamp result to valid range
-		if (l < 0) l = 0;
-		if (l > 255) l = 255;
+		l = CLAMP(l, 0, 255);
 
 		*dst++ = (unsigned char) (l);
 		*dst++ = (unsigned char) (l);

src/filter/rgbnoise/rgbnoise.c

@@ -29,12 +29,14 @@
 #include "frei0r.h"
 #include "frei0r/math.h"
 
+#define MY_MAX_RAND 32767 // assume RAND_MAX to be at least this big.
+
 typedef struct rgbnoise_instance
 {
   unsigned int width;
   unsigned int height;
   double noise;
-  double gaussian_lookup[32767];
+  double gaussian_lookup[MY_MAX_RAND];
   int table_inited;
   int next_gaussian_index;
   int last_in_range;
@@ -77,7 +79,7 @@ f0r_instance_t f0r_construct(unsigned int width, unsigned int height)
   inst->noise = 0.2;
   inst->table_inited = 0;
   inst->next_gaussian_index = 0;
-  inst->last_in_range = 32766;
+  inst->last_in_range = MY_MAX_RAND;
   return (f0r_instance_t)inst;
 }
 
@@ -137,8 +139,8 @@ static inline double gauss()
 static void create_new_lookup_range(rgbnoise_instance_t* inst)
 {
     int first, last, tmp;
-    first = rand() % (32767 - 1);
-    last = rand() % (32767 - 1);
+    first = rand() % (MY_MAX_RAND - 1);
+    last = rand() % (MY_MAX_RAND - 1);
     if (first > last)
     {
       tmp = last;
@@ -185,13 +187,13 @@ void rgb_noise(f0r_instance_t instance, double time,
   if (inst->table_inited == 0)
   {
     int i;
-    for( i = 0; i < 32767; i++)
+    for( i = 0; i < MY_MAX_RAND; i++)
     {
       inst->gaussian_lookup[i] = gauss() * 127.0;
     }
     inst->table_inited = 1;
     inst->next_gaussian_index = 0;
-    inst->last_in_range = 32766;
+    inst->last_in_range = MY_MAX_RAND;
   }
 
   unsigned char* dst = (unsigned char*)outframe;
@@ -218,4 +220,3 @@ void f0r_update(f0r_instance_t instance, double time,
   assert(instance);
   rgb_noise(instance, time, inframe, outframe);
 }
-

src/filter/rgbsplit0r/rgbsplit0r.c

@@ -111,13 +111,6 @@ f0r_instance_t f0r_construct(unsigned int width, unsigned int height)
     inst->width = width; inst->height = height;
     inst->shiftY = 0;
     inst->shiftX = 0;
-
-    // Initialize default values for shift to avoid division by zero issues
-    if (width > 0 && height > 0) {
-        inst->shiftY = (unsigned int)((height / 8) * 0.0); // 0.0 corresponds to center
-        inst->shiftX = (unsigned int)((width / 8) * 0.0);  // 0.0 corresponds to center
-    }
-
     return (f0r_instance_t)inst;
 }
 
@@ -239,4 +232,3 @@ void f0r_update(f0r_instance_t instance, double time,
             *(dst + x + (y*inst->width)) = (pxG | pxB | pxR);
         }
 }
-

src/filter/water/water.cpp

@@ -141,11 +141,11 @@ public:
 
   ~Water() {
     delete geo;
-    if (Height[0]) free(Height[0]);
-    if (Height[1]) free(Height[1]);
-    if (BkGdImagePre) free(BkGdImagePre);
-    if (BkGdImage) free(BkGdImage);
-    if (BkGdImagePost) free(BkGdImagePost);
+    free(Height[0]);
+    free(Height[1]);
+    free(BkGdImagePre);
+    free(BkGdImage);
+    free(BkGdImagePost);
   }
 
   virtual void update(double time,