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 // These intrinsics were unavailable before VS 2008. 15 // TODO(andrew): move to a common file. 16 #if defined(_MSC_VER) && _MSC_VER < 1500 17 #include <emmintrin.h> 18 static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__m128*)&a; } 19 static __inline __m128i _mm_castps_si128(__m128 a) { return *(__m128i*)&a; } 20 #endif 21 22 #ifdef _MSC_VER /* visual c++ */ 23 # define ALIGN16_BEG __declspec(align(16)) 24 # define ALIGN16_END 25 #else /* gcc or icc */ 26 # define ALIGN16_BEG 27 # define ALIGN16_END __attribute__((aligned(16))) 28 #endif 29 30 // constants shared by all paths (C, SSE2). 31 extern float rdft_w[64]; 32 // constants used by the C path. 33 extern float rdft_wk3ri_first[32]; 34 extern float rdft_wk3ri_second[32]; 35 // constants used by SSE2 but initialized in C path. 36 extern float rdft_wk1r[32]; 37 extern float rdft_wk2r[32]; 38 extern float rdft_wk3r[32]; 39 extern float rdft_wk1i[32]; 40 extern float rdft_wk2i[32]; 41 extern float rdft_wk3i[32]; 42 extern float cftmdl_wk1r[4]; 43 44 // code path selection function pointers 45 typedef void (*rft_sub_128_t)(float *a); 46 extern rft_sub_128_t rftfsub_128; 47 extern rft_sub_128_t rftbsub_128; 48 extern rft_sub_128_t cft1st_128; 49 extern rft_sub_128_t cftmdl_128; 50 51 // entry points 52 void aec_rdft_init(void); 53 void aec_rdft_init_sse2(void); 54 void aec_rdft_forward_128(float *a); 55 void aec_rdft_inverse_128(float *a); 56 57 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_ 58
