1 files changed, 61 insertions, 0 deletions
diff --git a/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_rdft.h b/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_rdft.h
new file mode 100644
index 00000000..18eb7a5c
--- /dev/null
+++ b/third_party/webrtc/src/webrtc/modules/audio_processing/aec/aec_rdft.h
@@ -0,0 +1,61 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
+#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_
+
+#include "webrtc/modules/audio_processing/aec/aec_common.h"
+
+// These intrinsics were unavailable before VS 2008.
+// TODO(andrew): move to a common file.
+#if defined(_MSC_VER) && _MSC_VER < 1500
+#include <emmintrin.h>
+static __inline __m128 _mm_castsi128_ps(__m128i a) { return *(__m128*)&a; }
+static __inline __m128i _mm_castps_si128(__m128 a) { return *(__m128i*)&a; }
+#endif
+
+// Constants shared by all paths (C, SSE2, NEON).
+extern const float rdft_w[64];
+// Constants used by the C path.
+extern const float rdft_wk3ri_first[16];
+extern const float rdft_wk3ri_second[16];
+// Constants used by SSE2 and NEON but initialized in the C path.
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk1r[32];
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk2r[32];
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk3r[32];
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk1i[32];
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk2i[32];
+extern ALIGN16_BEG const float ALIGN16_END rdft_wk3i[32];
+extern ALIGN16_BEG const float ALIGN16_END cftmdl_wk1r[4];
+
+// code path selection function pointers
+typedef void (*RftSub128)(float* a);
+extern RftSub128 rftfsub_128;
+extern RftSub128 rftbsub_128;
+extern RftSub128 cft1st_128;
+extern RftSub128 cftmdl_128;
+extern RftSub128 cftfsub_128;
+extern RftSub128 cftbsub_128;
+extern RftSub128 bitrv2_128;
+
+// entry points
+void aec_rdft_init(void);
+void aec_rdft_init_sse2(void);
+void aec_rdft_forward_128(float* a);
+void aec_rdft_inverse_128(float* a);
+
+#if defined(MIPS_FPU_LE)
+void aec_rdft_init_mips(void);
+#endif
+#if defined(WEBRTC_DETECT_NEON) || defined(WEBRTC_HAS_NEON)
+void aec_rdft_init_neon(void);
+#endif
+
+#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_MAIN_SOURCE_AEC_RDFT_H_