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| 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 #include "webrtc/modules/audio_processing/aec3/output_selector.h" |
| 12 |
| 13 #include <algorithm> |
| 14 #include <array> |
| 15 |
| 16 #include "webrtc/modules/audio_processing/aec3/aec3_common.h" |
| 17 #include "webrtc/test/gtest.h" |
| 18 |
| 19 namespace webrtc { |
| 20 |
| 21 // Verifies that the switching between the signals in the output works as |
| 22 // intended. |
| 23 TEST(OutputSelector, ProperSwitching) { |
| 24 OutputSelector selector; |
| 25 |
| 26 constexpr int kNumBlocksToSwitchToSubtractor = 3; |
| 27 constexpr int kNumBlocksToSwitchFromSubtractor = 10; |
| 28 |
| 29 std::array<float, kBlockSize> weaker; |
| 30 std::array<float, kBlockSize> stronger; |
| 31 std::array<float, kBlockSize> y; |
| 32 std::array<float, kBlockSize> e; |
| 33 weaker.fill(10.f); |
| 34 stronger.fill(20.f); |
| 35 |
| 36 bool y_is_weakest = false; |
| 37 |
| 38 const auto form_e_and_y = [&](bool y_equals_weaker) { |
| 39 if (y_equals_weaker) { |
| 40 std::copy(weaker.begin(), weaker.end(), y.begin()); |
| 41 std::copy(stronger.begin(), stronger.end(), e.begin()); |
| 42 } else { |
| 43 std::copy(stronger.begin(), stronger.end(), y.begin()); |
| 44 std::copy(weaker.begin(), weaker.end(), e.begin()); |
| 45 } |
| 46 }; |
| 47 |
| 48 for (int k = 0; k < 30; ++k) { |
| 49 // Verify that it takes a while for the signals transition to take effect. |
| 50 const int num_blocks_to_switch = y_is_weakest |
| 51 ? kNumBlocksToSwitchFromSubtractor |
| 52 : kNumBlocksToSwitchToSubtractor; |
| 53 for (int j = 0; j < num_blocks_to_switch; ++j) { |
| 54 form_e_and_y(y_is_weakest); |
| 55 selector.FormLinearOutput(e, y); |
| 56 EXPECT_EQ(stronger, y); |
| 57 EXPECT_EQ(y_is_weakest, selector.UseSubtractorOutput()); |
| 58 } |
| 59 |
| 60 // Verify that the transition block is a mix between the signals. |
| 61 form_e_and_y(y_is_weakest); |
| 62 selector.FormLinearOutput(e, y); |
| 63 EXPECT_NE(weaker, y); |
| 64 EXPECT_NE(stronger, y); |
| 65 EXPECT_EQ(!y_is_weakest, selector.UseSubtractorOutput()); |
| 66 |
| 67 y_is_weakest = !y_is_weakest; |
| 68 } |
| 69 } |
| 70 |
| 71 } // namespace webrtc |
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