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 #ifndef MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 12 #define MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 13 14 #include <memory> 15 16 namespace webrtc { 17 18 class FIRFilter; 19 20 // A single node of a Wavelet Packet Decomposition (WPD) tree. 21 class WPDNode { 22 public: 23 // Creates a WPDNode. The data vector will contain zeros. The filter will have 24 // the coefficients provided. 25 WPDNode(size_t length, const float* coefficients, size_t coefficients_length); 26 ~WPDNode(); 27 28 // Updates the node data. |parent_data| / 2 must be equals to |length_|. 29 // Returns 0 if correct, and -1 otherwise. 30 int Update(const float* parent_data, size_t parent_data_length); 31 data()32 const float* data() const { return data_.get(); } 33 // Returns 0 if correct, and -1 otherwise. 34 int set_data(const float* new_data, size_t length); length()35 size_t length() const { return length_; } 36 37 private: 38 std::unique_ptr<float[]> data_; 39 size_t length_; 40 std::unique_ptr<FIRFilter> filter_; 41 }; 42 43 } // namespace webrtc 44 45 #endif // MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 46