Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 33 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_processing/echo_detector/mean_variance_estimator.h b/third_party/libwebrtc/modules/audio_processing/echo_detector/mean_variance_estimator.h
new file mode 100644
index 0000000000..7f793df1e8
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/echo_detector/mean_variance_estimator.h
@@ -0,0 +1,33 @@
+/*
+ *  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.
+ */
+
+#ifndef MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_
+#define MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_
+
+namespace webrtc {
+
+// This class iteratively estimates the mean and variance of a signal.
+class MeanVarianceEstimator {
+ public:
+  void Update(float value);
+  float std_deviation() const;
+  float mean() const;
+  void Clear();
+
+ private:
+  // Estimate of the expected value of the input values.
+  float mean_ = 0.f;
+  // Estimate of the variance of the input values.
+  float variance_ = 0.f;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_ECHO_DETECTOR_MEAN_VARIANCE_ESTIMATOR_H_