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>
20static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__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).
25extern const float rdft_w[64];
26// Constants used by the C path.
27extern const float rdft_wk3ri_first[16];
28extern const float rdft_wk3ri_second[16];
29// Constants used by SSE2 and NEON but initialized in the C path.
30extern ALIGN16_BEG const float ALIGN16_END rdft_wk1r[32];
31extern ALIGN16_BEG const float ALIGN16_END rdft_wk2r[32];
32extern ALIGN16_BEG const float ALIGN16_END rdft_wk3r[32];
33extern ALIGN16_BEG const float ALIGN16_END rdft_wk1i[32];
34extern ALIGN16_BEG const float ALIGN16_END rdft_wk2i[32];
35extern ALIGN16_BEG const float ALIGN16_END rdft_wk3i[32];
36extern ALIGN16_BEG const float ALIGN16_END cftmdl_wk1r[4];
37
38// code path selection function pointers
39typedef void (*RftSub128)(float* a);
40extern RftSub128 rftfsub_128;
41extern RftSub128 rftbsub_128;
42extern RftSub128 cft1st_128;
43extern RftSub128 cftmdl_128;
44extern RftSub128 cftfsub_128;
45extern RftSub128 cftbsub_128;
46extern RftSub128 bitrv2_128;
47
48// entry points
49void aec_rdft_init(void);
50void aec_rdft_init_sse2(void);
51void aec_rdft_forward_128(float* a);
52void aec_rdft_inverse_128(float* a);
53
54#if defined(MIPS_FPU_LE)
55void aec_rdft_init_mips(void);
56#endif
57#if defined(WEBRTC_DETECT_NEON) || defined(WEBRTC_HAS_NEON)
58void aec_rdft_init_neon(void);
59#endif
60
61#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
62