1 /* 2 * Copyright (c) 2013 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 // This header file defines the coefficients of the FIR based approximation of 12 // the Meyer Wavelet 13 #ifndef MODULES_AUDIO_PROCESSING_TRANSIENT_DAUBECHIES_8_WAVELET_COEFFS_H_ 14 #define MODULES_AUDIO_PROCESSING_TRANSIENT_DAUBECHIES_8_WAVELET_COEFFS_H_ 15 16 // Decomposition coefficients Daubechies 8. 17 18 namespace webrtc { 19 20 const int kDaubechies8CoefficientsLength = 16; 21 22 const float kDaubechies8HighPassCoefficients[kDaubechies8CoefficientsLength] = { 23 -5.44158422430816093862e-02f, 3.12871590914465924627e-01f, 24 -6.75630736298012846142e-01f, 5.85354683654869090148e-01f, 25 1.58291052560238926228e-02f, -2.84015542962428091389e-01f, 26 -4.72484573997972536787e-04f, 1.28747426620186011803e-01f, 27 1.73693010020221083600e-02f, -4.40882539310647192377e-02f, 28 -1.39810279170155156436e-02f, 8.74609404701565465445e-03f, 29 4.87035299301066034600e-03f, -3.91740372995977108837e-04f, 30 -6.75449405998556772109e-04f, -1.17476784002281916305e-04f}; 31 32 const float kDaubechies8LowPassCoefficients[kDaubechies8CoefficientsLength] = { 33 -1.17476784002281916305e-04f, 6.75449405998556772109e-04f, 34 -3.91740372995977108837e-04f, -4.87035299301066034600e-03f, 35 8.74609404701565465445e-03f, 1.39810279170155156436e-02f, 36 -4.40882539310647192377e-02f, -1.73693010020221083600e-02f, 37 1.28747426620186011803e-01f, 4.72484573997972536787e-04f, 38 -2.84015542962428091389e-01f, -1.58291052560238926228e-02f, 39 5.85354683654869090148e-01f, 6.75630736298012846142e-01f, 40 3.12871590914465924627e-01f, 5.44158422430816093862e-02f}; 41 42 } // namespace webrtc 43 44 #endif // MODULES_AUDIO_PROCESSING_TRANSIENT_DAUBECHIES_8_WAVELET_COEFFS_H_ 45