1/*
2 *  Copyright (c) 2011 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/*--------------------------------*-C-*---------------------------------*
12 * File:
13 * fft.h
14 * ---------------------------------------------------------------------*
15 * Re[]: real value array
16 * Im[]: imaginary value array
17 * nTotal: total number of complex values
18 * nPass: number of elements involved in this pass of transform
19 * nSpan: nspan/nPass = number of bytes to increment pointer
20 *  in Re[] and Im[]
21 * isign: exponent: +1 = forward  -1 = reverse
22 * scaling: normalizing constant by which the final result is *divided*
23 * scaling == -1, normalize by total dimension of the transform
24 * scaling <  -1, normalize by the square-root of the total dimension
25 *
26 * ----------------------------------------------------------------------
27 * See the comments in the code for correct usage!
28 */
29
30#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_FFT_H_
31#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_FFT_H_
32
33
34#include "structs.h"
35
36
37int16_t WebRtcIsacfix_FftRadix16Fastest(int16_t RexQx[], int16_t ImxQx[], int16_t iSign);
38
39
40
41#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_FFT_H_ */
42