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 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_ 13 14 #include "webrtc/modules/audio_processing/aec/aec_common.h" 15 16 // These intrinsics were unavailable before VS 2008. 17 // TODO(andrew): move to a common file. 18 #if defined(_MSC_VER) && _MSC_VER < 1500 19 #include <emmintrin.h> _mm_castsi128_ps(__m128i a)20static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__m128*)&a; } _mm_castps_si128(__m128 a)21static __inline __m128i _mm_castps_si128(__m128 a) { return *(__m128i*)&a; } 22 #endif 23 24 // Constants shared by all paths (C, SSE2, NEON). 25 extern const float rdft_w[64]; 26 // Constants used by the C path. 27 extern const float rdft_wk3ri_first[16]; 28 extern const float rdft_wk3ri_second[16]; 29 // Constants used by SSE2 and NEON but initialized in the C path. 30 extern ALIGN16_BEG const float ALIGN16_END rdft_wk1r[32]; 31 extern ALIGN16_BEG const float ALIGN16_END rdft_wk2r[32]; 32 extern ALIGN16_BEG const float ALIGN16_END rdft_wk3r[32]; 33 extern ALIGN16_BEG const float ALIGN16_END rdft_wk1i[32]; 34 extern ALIGN16_BEG const float ALIGN16_END rdft_wk2i[32]; 35 extern ALIGN16_BEG const float ALIGN16_END rdft_wk3i[32]; 36 extern ALIGN16_BEG const float ALIGN16_END cftmdl_wk1r[4]; 37 38 // code path selection function pointers 39 typedef void (*RftSub128)(float* a); 40 extern RftSub128 rftfsub_128; 41 extern RftSub128 rftbsub_128; 42 extern RftSub128 cft1st_128; 43 extern RftSub128 cftmdl_128; 44 extern RftSub128 cftfsub_128; 45 extern RftSub128 cftbsub_128; 46 extern RftSub128 bitrv2_128; 47 48 // entry points 49 void aec_rdft_init(void); 50 void aec_rdft_init_sse2(void); 51 void aec_rdft_forward_128(float* a); 52 void aec_rdft_inverse_128(float* a); 53 54 #if defined(MIPS_FPU_LE) 55 void aec_rdft_init_mips(void); 56 #endif 57 #if defined(WEBRTC_DETECT_ARM_NEON) || defined(WEBRTC_ARCH_ARM_NEON) 58 void aec_rdft_init_neon(void); 59 #endif 60 61 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_ 62