| /* |
| * Copyright 2024 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 VIDEO_CORRUPTION_DETECTION_HALTON_SEQUENCE_H_ |
| #define VIDEO_CORRUPTION_DETECTION_HALTON_SEQUENCE_H_ |
| |
| #include <vector> |
| |
| namespace webrtc { |
| |
| // Generates the Halton sequence: a low discrepancy sequence of doubles in the |
| // half-open interval [0,1). See https://en.wikipedia.org/wiki/Halton_sequence |
| // for information on how the sequence is constructed. |
| class HaltonSequence { |
| public: |
| // Creates a sequence in `num_dimensions` number of dimensions. Possible |
| // values are [1, 5]. |
| explicit HaltonSequence(int num_dimensions); |
| // Creates a default sequence in a single dimension. |
| HaltonSequence() = default; |
| HaltonSequence(const HaltonSequence&) = default; |
| HaltonSequence(HaltonSequence&&) = default; |
| HaltonSequence& operator=(const HaltonSequence&) = default; |
| HaltonSequence& operator=(HaltonSequence&&) = default; |
| ~HaltonSequence() = default; |
| |
| // Gets the next point in the sequence where each value is in the half-open |
| // interval [0,1). |
| std::vector<double> GetNext(); |
| int GetCurrentIndex() const { return current_idx_; } |
| void SetCurrentIndex(int idx) { current_idx_ = idx; } |
| void Reset(); |
| |
| private: |
| int num_dimensions_ = 1; |
| int current_idx_ = 0; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // VIDEO_CORRUPTION_DETECTION_HALTON_SEQUENCE_H_ |