1 /****************************************************************************** 2 * * 3 * Copyright (C) 2023 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 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 */ 20 21 #pragma once 22 23 #define C70 (-0.1666667014f) //(cos(u) + cos(2 * u) + cos(3 * u)) / 3; 24 #define C71 (0.7901564837f) //(2 * cos(u) - cos(2 * u) - cos(3 * u)) / 3; 25 #define C72 (0.0558542535f) //(cos(u) - 2 * cos(2 * u) + cos(3 * u)) / 3; 26 #define C73 (0.7343022227f) //(cos(u) + cos(2 * u) - 2 * cos(3 * u)) / 3; 27 #define C74 (-0.4409585893f) //(sin(u) + sin(2 * u) - sin(3 * u)) / 3; 28 #define C75 (-0.3408728838f) //(2 * sin(u) - sin(2 * u) + sin(3 * u)) / 3; 29 #define C76 (0.5339693427f) //(sin(u) - 2 * sin(2 * u) - sin(3 * u)) / 3; 30 #define C77 (-0.8748422265f) //(sin(u) + sin(2 * u) + 2 * sin(3 * u)) / 3; 31 32 #define CPLX_MPY_FFT(re, im, a, b, c, d) \ 33 { \ 34 re = ((a * c) - (b * d)); \ 35 im = ((a * d) + (b * c)); \ 36 } 37 38 IA_ERRORCODE iusace_fft_based_mdct(FLOAT64 *ptr_in, FLOAT64 *ptr_out, WORD32 npoints, 39 const WORD32 tx_flag, iusace_scratch_mem *pstr_scratch); 40 41 VOID iusace_complex_fft(FLOAT32 *data, WORD32 nlength, iusace_scratch_mem *pstr_scratch); 42