Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 50 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_processing/transient/moving_moments.cc b/third_party/libwebrtc/modules/audio_processing/transient/moving_moments.cc
new file mode 100644
index 0000000000..83810bfe3c
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/transient/moving_moments.cc
@@ -0,0 +1,50 @@
+/*
+ *  Copyright (c) 2013 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/transient/moving_moments.h"
+
+#include <algorithm>
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+MovingMoments::MovingMoments(size_t length)
+    : length_(length), queue_(), sum_(0.0), sum_of_squares_(0.0) {
+  RTC_DCHECK_GT(length, 0);
+  for (size_t i = 0; i < length; ++i) {
+    queue_.push(0.0);
+  }
+}
+
+MovingMoments::~MovingMoments() {}
+
+void MovingMoments::CalculateMoments(const float* in,
+                                     size_t in_length,
+                                     float* first,
+                                     float* second) {
+  RTC_DCHECK(in);
+  RTC_DCHECK_GT(in_length, 0);
+  RTC_DCHECK(first);
+  RTC_DCHECK(second);
+
+  for (size_t i = 0; i < in_length; ++i) {
+    const float old_value = queue_.front();
+    queue_.pop();
+    queue_.push(in[i]);
+
+    sum_ += in[i] - old_value;
+    sum_of_squares_ += in[i] * in[i] - old_value * old_value;
+    first[i] = sum_ / length_;
+    second[i] = std::max(0.f, sum_of_squares_ / length_);
+  }
+}
+
+}  // namespace webrtc