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65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
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#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
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// These intrinsics were unavailable before VS 2008.
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// TODO(andrew): move to a common file.
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#if defined(_MSC_VER) && _MSC_VER < 1500
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#include <emmintrin.h>
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static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__m128*)&a; }
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static __inline __m128i _mm_castps_si128(__m128 a) { return *(__m128i*)&a; }
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#endif
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#ifdef _MSC_VER /* visual c++ */
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#define ALIGN16_BEG __declspec(align(16))
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#define ALIGN16_END
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#else /* gcc or icc */
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#define ALIGN16_BEG
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#define ALIGN16_END __attribute__((aligned(16)))
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#endif
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// constants shared by all paths (C, SSE2).
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extern float rdft_w[64];
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// constants used by the C path.
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extern float rdft_wk3ri_first[32];
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extern float rdft_wk3ri_second[32];
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// constants used by SSE2 but initialized in C path.
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extern ALIGN16_BEG float ALIGN16_END rdft_wk1r[32];
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extern ALIGN16_BEG float ALIGN16_END rdft_wk2r[32];
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extern ALIGN16_BEG float ALIGN16_END rdft_wk3r[32];
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extern ALIGN16_BEG float ALIGN16_END rdft_wk1i[32];
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extern ALIGN16_BEG float ALIGN16_END rdft_wk2i[32];
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extern ALIGN16_BEG float ALIGN16_END rdft_wk3i[32];
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extern ALIGN16_BEG float ALIGN16_END cftmdl_wk1r[4];
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// code path selection function pointers
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typedef void (*rft_sub_128_t)(float* a);
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extern rft_sub_128_t rftfsub_128;
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extern rft_sub_128_t rftbsub_128;
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extern rft_sub_128_t cft1st_128;
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extern rft_sub_128_t cftmdl_128;
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extern rft_sub_128_t cftfsub_128;
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extern rft_sub_128_t cftbsub_128;
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extern rft_sub_128_t bitrv2_128;
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// entry points
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void aec_rdft_init(void);
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void aec_rdft_init_sse2(void);
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void aec_rdft_forward_128(float* a);
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void aec_rdft_inverse_128(float* a);
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#if defined(MIPS_FPU_LE)
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void aec_rdft_init_mips(void);
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#endif
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#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
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