1 /*
2 * Copyright (C) 2004-2010 NXP Software
3 * Copyright (C) 2010 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #ifndef __SCALARARITHMETIC_H__
19 #define __SCALARARITHMETIC_H__
20
21 /*######################################################################################*/
22 /* Include files */
23 /*######################################################################################*/
24 #include <math.h>
25 #include "LVM_Types.h"
26
27 /*######################################################################################*/
28 /* Extern function prototypes */
29 /*######################################################################################*/
30
31 /* Absolute value including the corner case for the extreme negative value */
32
Abs_Float(LVM_FLOAT input)33 static inline LVM_FLOAT Abs_Float(LVM_FLOAT input) {
34 return fabs(input);
35 }
36
LVM_Clamp(LVM_FLOAT val)37 static inline LVM_FLOAT LVM_Clamp(LVM_FLOAT val) {
38 return fmin(fmax(val, -1.0f), 1.0f);
39 }
40
41 /****************************************************************************************
42 * Name : dB_to_Lin32()
43 * Input : Signed 16-bit integer
44 * MSB (16) = sign bit
45 * (15->05) = integer part
46 * (04->01) = decimal part
47 * Output : Signed 32-bit integer
48 * MSB (32) = sign bit
49 * (31->16) = integer part
50 * (15->01) = decimal part
51 * Returns : Lin value format 1.16.15
52 ****************************************************************************************/
53 LVM_FLOAT dB_to_LinFloat(LVM_INT16 db_fix);
54
55 #endif /* __SCALARARITHMETIC_H__ */
56