1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 * 10 */ 11 12 #include "dl/api/omxtypes.h" 13 14 void x86SP_FFT_CToC_FC32_Fwd_Radix2_fs( 15 const OMX_F32 *in, 16 OMX_F32 *out, 17 OMX_INT n) { 18 OMX_INT i; 19 OMX_F32 *out0 = out; 20 21 for (i = 0; i < n; i += 2) { 22 const OMX_F32 *in0 = in + i; 23 const OMX_F32 *in1 = in0 + n; 24 OMX_F32 *out1 = out0 + (n >> 1); 25 26 // CADD out0, in0, in1 27 out0[0] = in0[0] + in1[0]; 28 out0[n] = in0[1] + in1[1]; 29 30 // CSUB out1, in0, in1 31 out1[0] = in0[0] - in1[0]; 32 out1[n] = in0[1] - in1[1]; 33 34 out0 += 1; 35 } 36 } 37
