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Unified Diff: webrtc/modules/audio_processing/vad/vad_circular_buffer.h

Issue 1192863006: Revert "Pull the Voice Activity Detector out from the AGC" (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Created 5 years, 6 months ago
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Index: webrtc/modules/audio_processing/vad/vad_circular_buffer.h
diff --git a/webrtc/modules/audio_processing/vad/vad_circular_buffer.h b/webrtc/modules/audio_processing/vad/vad_circular_buffer.h
deleted file mode 100644
index 5238f77257bf41b6ba8e11b128a1e36b95f86a6f..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_processing/vad/vad_circular_buffer.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * 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 WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_CIRCULAR_BUFFER_H_
-#define WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_CIRCULAR_BUFFER_H_
-
-#include "webrtc/base/scoped_ptr.h"
-
-namespace webrtc {
-
-// A circular buffer tailored to the need of this project. It stores last
-// K samples of the input, and keeps track of the mean of the last samples.
-//
-// It is used in class "PitchBasedActivity" to keep track of posterior
-// probabilities in the past few seconds. The posterior probabilities are used
-// to recursively update prior probabilities.
-class VadCircularBuffer {
- public:
- static VadCircularBuffer* Create(int buffer_size);
- ~VadCircularBuffer();
-
- // If buffer is wrapped around.
- bool is_full() const { return is_full_; }
- // Get the oldest entry in the buffer.
- double Oldest() const;
- // Insert new value into the buffer.
- void Insert(double value);
- // Reset buffer, forget the past, start fresh.
- void Reset();
-
- // The mean value of the elements in the buffer. The return value is zero if
- // buffer is empty, i.e. no value is inserted.
- double Mean();
- // Remove transients. If the values exceed |val_threshold| for a period
- // shorter then or equal to |width_threshold|, then that period is considered
- // transient and set to zero.
- int RemoveTransient(int width_threshold, double val_threshold);
-
- private:
- explicit VadCircularBuffer(int buffer_size);
- // Get previous values. |index = 0| corresponds to the most recent
- // insertion. |index = 1| is the one before the most recent insertion, and
- // so on.
- int Get(int index, double* value) const;
- // Set a given position to |value|. |index| is interpreted as above.
- int Set(int index, double value);
- // Return the number of valid elements in the buffer.
- int BufferLevel();
-
- // Convert an index with the interpretation as get() method to the
- // corresponding linear index.
- int ConvertToLinearIndex(int* index) const;
-
- rtc::scoped_ptr<double[]> buffer_;
- bool is_full_;
- int index_;
- int buffer_size_;
- double sum_;
-};
-
-} // namespace webrtc
-#endif // WEBRTC_MODULES_AUDIO_PROCESSING_VAD_VAD_CIRCULAR_BUFFER_H_

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