2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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.
15 #include "dl/api/omxtypes.h"
22 * Number of sub-transforms performed in the final stage of the 65536-size FFT.
23 * The number of sub-transforms for all other stages can be derived from this
24 * number. This sequence of numbers is equivalent to the Jacobsthal number
25 * sequence (see http://en.wikipedia.org/wiki/Jacobsthal_number).
27 #define SUBTRANSFORM_CONST (0x2aab)
28 #define SQRT1_2 (0.7071067812f) /* sqrt(0.5f) */
30 extern OMX_F32 mipsSP_FFT_F32TwiddleTable[];
32 typedef struct MIPSFFTSpec_R_FC32_Tag {
36 const OMX_U16* pOffset;
37 const OMX_F32* pTwiddle;