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 WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 13 14 #include "webrtc/base/scoped_ptr.h" 15 #include "webrtc/typedefs.h" 16 17 namespace webrtc { 18 19 class FIRFilter; 20 21 // A single node of a Wavelet Packet Decomposition (WPD) tree. 22 class WPDNode { 23 public: 24 // Creates a WPDNode. The data vector will contain zeros. The filter will have 25 // the coefficients provided. 26 WPDNode(size_t length, const float* coefficients, size_t coefficients_length); 27 ~WPDNode(); 28 29 // Updates the node data. |parent_data| / 2 must be equals to |length_|. 30 // Returns 0 if correct, and -1 otherwise. 31 int Update(const float* parent_data, size_t parent_data_length); 32 data()33 const float* data() const { return data_.get(); } 34 // Returns 0 if correct, and -1 otherwise. 35 int set_data(const float* new_data, size_t length); length()36 size_t length() const { return length_; } 37 38 private: 39 rtc::scoped_ptr<float[]> data_; 40 size_t length_; 41 rtc::scoped_ptr<FIRFilter> filter_; 42 }; 43 44 } // namespace webrtc 45 46 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_ 47