echo_canceller_test_tools.h (1493B)
1 /* 2 * Copyright (c) 2017 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_TEST_ECHO_CANCELLER_TEST_TOOLS_H_ 12 #define MODULES_AUDIO_PROCESSING_TEST_ECHO_CANCELLER_TEST_TOOLS_H_ 13 14 #include <cstddef> 15 #include <vector> 16 17 #include "api/array_view.h" 18 #include "rtc_base/random.h" 19 20 namespace webrtc { 21 22 // Randomizes the elements in a vector with values -32767.f:32767.f. 23 void RandomizeSampleVector(Random* random_generator, ArrayView<float> v); 24 25 // Randomizes the elements in a vector with values -amplitude:amplitude. 26 void RandomizeSampleVector(Random* random_generator, 27 ArrayView<float> v, 28 float amplitude); 29 30 // Class for delaying a signal a fixed number of samples. 31 template <typename T> 32 class DelayBuffer { 33 public: 34 explicit DelayBuffer(size_t delay) : buffer_(delay) {} 35 ~DelayBuffer() = default; 36 37 // Produces a delayed signal copy of x. 38 void Delay(ArrayView<const T> x, ArrayView<T> x_delayed); 39 40 private: 41 std::vector<T> buffer_; 42 size_t next_insert_index_ = 0; 43 }; 44 45 } // namespace webrtc 46 47 #endif // MODULES_AUDIO_PROCESSING_TEST_ECHO_CANCELLER_TEST_TOOLS_H_