Adding upstream version 110.0.1.upstream/110.0.1upstream

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

1 files changed, 52 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_processing/agc/agc.h b/third_party/libwebrtc/modules/audio_processing/agc/agc.h
new file mode 100644
index 0000000000..da42808225
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/agc/agc.h
@@ -0,0 +1,52 @@
+/*
+ *  Copyright (c) 2012 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_AGC_AGC_H_
+#define MODULES_AUDIO_PROCESSING_AGC_AGC_H_
+
+#include <memory>
+
+#include "api/array_view.h"
+#include "modules/audio_processing/vad/voice_activity_detector.h"
+
+namespace webrtc {
+
+class LoudnessHistogram;
+
+class Agc {
+ public:
+  Agc();
+  virtual ~Agc();
+
+  // `audio` must be mono; in a multi-channel stream, provide the first (usually
+  // left) channel.
+  virtual void Process(rtc::ArrayView<const int16_t> audio);
+
+  // Retrieves the difference between the target RMS level and the current
+  // signal RMS level in dB. Returns true if an update is available and false
+  // otherwise, in which case `error` should be ignored and no action taken.
+  virtual bool GetRmsErrorDb(int* error);
+  virtual void Reset();
+
+  virtual int set_target_level_dbfs(int level);
+  virtual int target_level_dbfs() const;
+  virtual float voice_probability() const;
+
+ private:
+  double target_level_loudness_;
+  int target_level_dbfs_;
+  std::unique_ptr<LoudnessHistogram> histogram_;
+  std::unique_ptr<LoudnessHistogram> inactive_histogram_;
+  VoiceActivityDetector vad_;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_AGC_AGC_H_