blob: 9f17d61b75712f795c33eb9bf5b13a890434430e [file] [log] [blame]
/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*
*/
#include "dl/api/omxtypes.h"
void x86SP_FFT_CToC_FC32_Inv_Radix2_fs(
const OMX_F32 *in,
OMX_F32 *out,
OMX_INT n) {
OMX_INT i;
OMX_INT n_by_2 = n >> 1;
OMX_F32 *out0 = out;
for (i = 0; i < n_by_2; i++) {
const OMX_F32 *in0 = in + i;
const OMX_F32 *in1 = in0 + n_by_2;
OMX_F32 *out1 = out0 + n_by_2;
// CADD out0, in0, in1
out0[0] = in0[0] + in1[0];
out0[n] = in0[n] + in1[n];
// CSUB out1, in0, in1
out1[0] = in0[0] - in1[0];
out1[n] = in0[n] - in1[n];
out0 += 1;
}
}