1 /* 2 * Copyright (c) 2014 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 #ifndef _MIPSSP_H_ 13 #define _MIPSSP_H_ 14 15 #include "dl/api/omxtypes.h" 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 /* 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). 26 */ 27 #define SUBTRANSFORM_CONST (0x2aab) 28 #define SQRT1_2 (0.7071067812f) /* sqrt(0.5f) */ 29 30 extern OMX_F32 mipsSP_FFT_F32TwiddleTable[]; 31 32 typedef struct MIPSFFTSpec_R_FC32_Tag { 33 OMX_U32 order; 34 OMX_U16* pBitRev; 35 OMX_U16* pBitRevInv; 36 const OMX_U16* pOffset; 37 OMX_F32* pTwiddle; 38 OMX_F32* pBuf; 39 } MIPSFFTSpec_R_FC32; 40 41 #ifdef __cplusplus 42 } 43 #endif 44 45 #endif 46
