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> 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