+ add 'random' sampler : for testing

CMakeLists.txt

@@ -23,6 +23,8 @@ endif ()
 
 if (${SAMPLER} STREQUAL "dummy")
   set(SAMPLER "dummy")
+elseif (${SAMPLER} STREQUAL "random")
+  set(SAMPLER "random")
 else ()
   set(SAMPLER "magick")
 endif ()

src/samplers/random.c

@@ -0,0 +1,36 @@
+#include "../common.h"
+#include "../record.h"
+#include "../simdb.h"
+
+simdb_urec_t *
+simdb_record_create(const char * const path) {
+  simdb_urec_t *tmp;
+  uint8_t pattern;
+  uint16_t size;
+  float ratio = 0;
+  assert(path != NULL);
+
+  (void)(path);
+
+  if ((tmp = calloc(1, sizeof(simdb_urec_t))) == NULL)
+    return NULL;
+
+  tmp->used = 0xFF;
+
+  size  = 200 + rand() % 2000; /* [200, 2200] */
+  ratio = ((50 + rand() % 100) / (float) 100); /* [0.5, 1.5] */
+  tmp->image_w = size;
+  tmp->image_h = size * ratio;
+
+  pattern = rand() % 256;
+  for (size_t i =  0; i < 16; i += 2)
+    tmp->bitmap[i + 0] =  pattern,
+    tmp->bitmap[i + 1] = ~pattern;
+
+  pattern = rand() % 256;
+  for (size_t i = 16; i < 32; i += 2)
+    tmp->bitmap[i + 0] =  pattern,
+    tmp->bitmap[i + 1] = ~pattern;
+
+  return tmp;
+}