configure.ac: Add checks for Flex/Yacc/Bison and other furry animals, for the new...

[platform/upstream/gst-plugins-good.git] / gst / goom / goom_tools.h

diff --git a/gst/goom/goom_tools.h b/gst/goom/goom_tools.h
index 6178dba..31d044e 100644 (file)
--- a/gst/goom/goom_tools.h
+++ b/gst/goom/goom_tools.h
@@ -1,24 +1,33 @@
 #ifndef _GOOMTOOLS_H
 #define _GOOMTOOLS_H
 
-#define NB_RAND 0x10000
-
-#define RAND_INIT(gd,i) \
-        srand (i); \
-        if (gd->rand_tab == NULL) \
-                gd->rand_tab = g_malloc (NB_RAND * sizeof(gint)) ;\
-        gd->rand_pos = 0; \
-        while (gd->rand_pos < NB_RAND) \
-                gd->rand_tab [gd->rand_pos++] = rand ();
-
-#define RAND(gd) \
-        (gd->rand_tab[gd->rand_pos = ((gd->rand_pos + 1) % NB_RAND)])
-
-#define RAND_CLOSE(gd) \
-        g_free (gd->rand_tab); \
-        gd->rand_tab = NULL;
-
-/*#define iRAND(i) ((guint32)((float)i * RAND()/RAND_MAX)) */
-#define iRAND(gd,i) (RAND(gd) % i)
-        
+/**
+ * Random number generator wrapper for faster random number.
+ */
+
+#define GOOM_NB_RAND 0x10000
+
+typedef struct _GOOM_RANDOM {
+       int array[GOOM_NB_RAND];
+       unsigned short pos;
+} GoomRandom;
+
+GoomRandom *goom_random_init(int i);
+void goom_random_free(GoomRandom *grandom);
+
+inline static int goom_random(GoomRandom *grandom) {
+       
+       grandom->pos++; /* works because pos is an unsigned short */
+       return grandom->array[grandom->pos];
+}
+
+inline static int goom_irand(GoomRandom *grandom, int i) {
+
+       grandom->pos++;
+       return grandom->array[grandom->pos] % i;
+}
+
+/* called to change the specified number of value in the array, so that the array does not remain the same*/
+void goom_random_update_array(GoomRandom *grandom, int numberOfValuesToChange);
+
 #endif