1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
18 #define LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
19
20 #include <math.h>
21
22 namespace le_fx {
23
24 namespace sigmod {
25
26 template <typename T>
SearchIndex(const T x_data[],T x,int start_index,int end_index)27 int SearchIndex(const T x_data[],
28 T x,
29 int start_index,
30 int end_index) {
31 int start = start_index;
32 int end = end_index;
33 while (end > start + 1) {
34 int i = (end + start) / 2;
35 if (x_data[i] > x) {
36 end = i;
37 } else {
38 start = i;
39 }
40 }
41 return start;
42 }
43
44 } // namespace sigmod
45
46 } // namespace le_fx
47
48 #endif // LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
49