Refactor code; add documentation

include/decmp.h

@@ -22,10 +22,11 @@
 #include <cmp_entity.h>
 #include <cmp_support.h>
 
-int decompress_data(uint32_t *compressed_data, void *de_model_buf,
-		    const struct cmp_info *info, void *decompressed_data);
-
-int decompress_cmp_entiy(struct cmp_entity *ent, void *model_buf,
+int decompress_cmp_entiy(struct cmp_entity *ent, void *model_of_data,
 			 void *up_model_buf, void *decompressed_data);
 
+int decompress_rdcu_data(uint32_t *compressed_data, const struct cmp_info *info,
+			 uint16_t *model_of_data, uint16_t *up_model_buf,
+			 uint16_t *decompressed_data);
+
 #endif /* DECMP_H_ */

test/cmp_icu/test_decmp.c

@@ -110,7 +110,69 @@ void test_cmp_decmp_n_imagette_raw(void)
 }
 
 
-/*
+/**
+ * @test count_leading_ones
+ */
+
+void test_count_leading_ones(void)
+{
+	unsigned int n_leading_bit;
+	uint32_t value;
+
+	value = 0;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(0, n_leading_bit);
+
+	value = 0x7FFFFFFF;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(0, n_leading_bit);
+
+	value = 0x80000000;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(1, n_leading_bit);
+
+	value = 0xBFFFFFFF;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(1, n_leading_bit);
+
+	value = 0xFFFF0000;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(16, n_leading_bit);
+
+	value = 0xFFFF7FFF;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(16, n_leading_bit);
+
+	value = 0xFFFFFFFF;
+	n_leading_bit = count_leading_ones(value);
+	TEST_ASSERT_EQUAL_INT(32, n_leading_bit);
+}
+
+
+/**
+ * @test rice_decoder
+ */
+
+void test_rice_decoder(void)
+{
+	int cw_len;
+	uint32_t code_word;
+	unsigned int m = ~0;  /* we don't need this value */
+	unsigned int log2_m;
+	unsigned int decoded_cw;
+
+	/* test log_2 to big */
+	code_word = 0xE0000000;
+	log2_m = 33;
+	cw_len = rice_decoder(code_word, m, log2_m, &decoded_cw);
+	TEST_ASSERT_EQUAL(0, cw_len);
+	log2_m = UINT_MAX;
+	cw_len = rice_decoder(code_word, m, log2_m, &decoded_cw);
+	TEST_ASSERT_EQUAL(0, cw_len);
+}
+
+
+/**
  * @test re_map_to_pos
  */
 
@@ -160,25 +222,6 @@ void test_re_map_to_pos(void)
 }
 
 
-void test_rice_decoder(void)
-{
-	int cw_len;
-	uint32_t code_word;
-	unsigned int m = ~0;/* we don't need this value */
-	unsigned int log2_m;
-	unsigned int decoded_cw;
-
-	/* test log_2 to big */
-	code_word = 0xE0000000;
-	log2_m = 33;
-	cw_len = rice_decoder(code_word, m, log2_m, &decoded_cw);
-	TEST_ASSERT_EQUAL(0, cw_len);
-	log2_m = UINT_MAX;
-	cw_len = rice_decoder(code_word, m, log2_m, &decoded_cw);
-	TEST_ASSERT_EQUAL(0, cw_len);
-}
-
-
 void test_decode_normal(void)
 {
 	uint32_t decoded_value = ~0;