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_H_ 18 #define LE_FX_ENGINE_DSP_CORE_BASIC_H_ 19 20 #include <limits.h> 21 #include "common/core/math.h" 22 #include "common/core/types.h" 23 24 namespace le_fx { 25 26 namespace sigmod { 27 28 // Searchs for the interval that contains <x> using a divide-and-conquer 29 // algorithm. 30 // X[]: a vector of sorted values (X[i+1] > X[i]) 31 // x: a value 32 // StartIndex: the minimum searched index 33 // EndIndex: the maximum searched index 34 // returns: the index <i> that satisfies: X[i] <= x <= X[i+1] && 35 // StartIndex <= i <= (EndIndex-1) 36 template <typename T> 37 int SearchIndex(const T x_data[], 38 T x, 39 int start_index, 40 int end_index); 41 42 } // namespace sigmod 43 44 } // namespace le_fx 45 46 #include "dsp/core/basic-inl.h" 47 48 #endif // LE_FX_ENGINE_DSP_CORE_BASIC_H_ 49
