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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)20 static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__m128*)&a; }
_mm_castps_si128(__m128 a)21 static __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_NEON) || defined(WEBRTC_HAS_NEON)
58 void aec_rdft_init_neon(void);
59 #endif
60 
61 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
62