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/*
* Copyright (c) 2013 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 MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_
#define MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_
#include <cstddef>
#include <memory>
namespace webrtc {
class FIRFilter;
// A single node of a Wavelet Packet Decomposition (WPD) tree.
class WPDNode {
public:
// Creates a WPDNode. The data vector will contain zeros. The filter will have
// the coefficients provided.
WPDNode(size_t length, const float* coefficients, size_t coefficients_length);
~WPDNode();
// Updates the node data. `parent_data` / 2 must be equals to `length_`.
// Returns 0 if correct, and -1 otherwise.
int Update(const float* parent_data, size_t parent_data_length);
const float* data() const { return data_.get(); }
// Returns 0 if correct, and -1 otherwise.
int set_data(const float* new_data, size_t length);
size_t length() const { return length_; }
private:
std::unique_ptr<float[]> data_;
size_t length_;
std::unique_ptr<FIRFilter> filter_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_WPD_NODE_H_
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