Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 138 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_processing/residual_echo_detector_unittest.cc b/third_party/libwebrtc/modules/audio_processing/residual_echo_detector_unittest.cc
new file mode 100644
index 0000000000..d8c227a443
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/residual_echo_detector_unittest.cc
@@ -0,0 +1,138 @@
+/*
+ *  Copyright (c) 2016 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.
+ */
+
+#include "modules/audio_processing/residual_echo_detector.h"
+
+#include <vector>
+
+#include "api/make_ref_counted.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+
+TEST(ResidualEchoDetectorTests, Echo) {
+  auto echo_detector = rtc::make_ref_counted<ResidualEchoDetector>();
+  echo_detector->SetReliabilityForTest(1.0f);
+  std::vector<float> ones(160, 1.f);
+  std::vector<float> zeros(160, 0.f);
+
+  // In this test the capture signal has a delay of 10 frames w.r.t. the render
+  // signal, but is otherwise identical. Both signals are periodic with a 20
+  // frame interval.
+  for (int i = 0; i < 1000; i++) {
+    if (i % 20 == 0) {
+      echo_detector->AnalyzeRenderAudio(ones);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    } else if (i % 20 == 10) {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(ones);
+    } else {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    }
+  }
+  // We expect to detect echo with near certain likelihood.
+  auto ed_metrics = echo_detector->GetMetrics();
+  ASSERT_TRUE(ed_metrics.echo_likelihood);
+  EXPECT_NEAR(1.f, ed_metrics.echo_likelihood.value(), 0.01f);
+}
+
+TEST(ResidualEchoDetectorTests, NoEcho) {
+  auto echo_detector = rtc::make_ref_counted<ResidualEchoDetector>();
+  echo_detector->SetReliabilityForTest(1.0f);
+  std::vector<float> ones(160, 1.f);
+  std::vector<float> zeros(160, 0.f);
+
+  // In this test the capture signal is always zero, so no echo should be
+  // detected.
+  for (int i = 0; i < 1000; i++) {
+    if (i % 20 == 0) {
+      echo_detector->AnalyzeRenderAudio(ones);
+    } else {
+      echo_detector->AnalyzeRenderAudio(zeros);
+    }
+    echo_detector->AnalyzeCaptureAudio(zeros);
+  }
+  // We expect to not detect any echo.
+  auto ed_metrics = echo_detector->GetMetrics();
+  ASSERT_TRUE(ed_metrics.echo_likelihood);
+  EXPECT_NEAR(0.f, ed_metrics.echo_likelihood.value(), 0.01f);
+}
+
+TEST(ResidualEchoDetectorTests, EchoWithRenderClockDrift) {
+  auto echo_detector = rtc::make_ref_counted<ResidualEchoDetector>();
+  echo_detector->SetReliabilityForTest(1.0f);
+  std::vector<float> ones(160, 1.f);
+  std::vector<float> zeros(160, 0.f);
+
+  // In this test the capture signal has a delay of 10 frames w.r.t. the render
+  // signal, but is otherwise identical. Both signals are periodic with a 20
+  // frame interval. There is a simulated clock drift of 1% in this test, with
+  // the render side producing data slightly faster.
+  for (int i = 0; i < 1000; i++) {
+    if (i % 20 == 0) {
+      echo_detector->AnalyzeRenderAudio(ones);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    } else if (i % 20 == 10) {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(ones);
+    } else {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    }
+    if (i % 100 == 0) {
+      // This is causing the simulated clock drift.
+      echo_detector->AnalyzeRenderAudio(zeros);
+    }
+  }
+  // We expect to detect echo with high likelihood. Clock drift is harder to
+  // correct on the render side than on the capture side. This is due to the
+  // render buffer, clock drift can only be discovered after a certain delay.
+  // A growing buffer can be caused by jitter or clock drift and it's not
+  // possible to make this decision right away. For this reason we only expect
+  // an echo likelihood of 75% in this test.
+  auto ed_metrics = echo_detector->GetMetrics();
+  ASSERT_TRUE(ed_metrics.echo_likelihood);
+  EXPECT_GT(ed_metrics.echo_likelihood.value(), 0.75f);
+}
+
+TEST(ResidualEchoDetectorTests, EchoWithCaptureClockDrift) {
+  auto echo_detector = rtc::make_ref_counted<ResidualEchoDetector>();
+  echo_detector->SetReliabilityForTest(1.0f);
+  std::vector<float> ones(160, 1.f);
+  std::vector<float> zeros(160, 0.f);
+
+  // In this test the capture signal has a delay of 10 frames w.r.t. the render
+  // signal, but is otherwise identical. Both signals are periodic with a 20
+  // frame interval. There is a simulated clock drift of 1% in this test, with
+  // the capture side producing data slightly faster.
+  for (int i = 0; i < 1000; i++) {
+    if (i % 20 == 0) {
+      echo_detector->AnalyzeRenderAudio(ones);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    } else if (i % 20 == 10) {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(ones);
+    } else {
+      echo_detector->AnalyzeRenderAudio(zeros);
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    }
+    if (i % 100 == 0) {
+      // This is causing the simulated clock drift.
+      echo_detector->AnalyzeCaptureAudio(zeros);
+    }
+  }
+  // We expect to detect echo with near certain likelihood.
+  auto ed_metrics = echo_detector->GetMetrics();
+  ASSERT_TRUE(ed_metrics.echo_likelihood);
+  EXPECT_NEAR(1.f, ed_metrics.echo_likelihood.value(), 0.01f);
+}
+
+}  // namespace webrtc