Pull the Voice Activity Detector out from the AGC

webrtc/modules/audio_processing/agc/circular_buffer.cc

Index: webrtc/modules/audio_processing/agc/circular_buffer.cc
diff --git a/webrtc/modules/audio_processing/agc/circular_buffer.cc b/webrtc/modules/audio_processing/agc/circular_buffer.cc
deleted file mode 100644
index 8ecb76008f7de71e14234daa8524010caa883747..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_processing/agc/circular_buffer.cc
+++ /dev/null
@@ -1,136 +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.
- */
-
-#include "webrtc/modules/audio_processing/agc/circular_buffer.h"
-
-#include <assert.h>
-#include <stdlib.h>
-
-namespace webrtc {
-
-AgcCircularBuffer::AgcCircularBuffer(int buffer_size)
-    : buffer_(new double[buffer_size]),
-      is_full_(false),
-      index_(0),
-      buffer_size_(buffer_size),
-      sum_(0) {}
-
-AgcCircularBuffer::~AgcCircularBuffer() {}
-
-void AgcCircularBuffer::Reset() {
-  is_full_ = false;
-  index_ = 0;
-  sum_ = 0;
-}
-
-AgcCircularBuffer* AgcCircularBuffer::Create(int buffer_size) {
-  if (buffer_size <= 0)
-    return NULL;
-  return new AgcCircularBuffer(buffer_size);
-}
-
-double AgcCircularBuffer::Oldest() const {
-  if (!is_full_)
-    return buffer_[0];
-  else
-    return buffer_[index_];
-}
-
-double AgcCircularBuffer::Mean() {
-  double m;
-  if (is_full_) {
-    m = sum_ / buffer_size_;
-  } else {
-    if (index_ > 0)
-      m = sum_ / index_;
-    else
-      m = 0;
-  }
-  return m;
-}
-
-void AgcCircularBuffer::Insert(double value) {
-  if (is_full_) {
-    sum_ -= buffer_[index_];
-  }
-  sum_ += value;
-  buffer_[index_] = value;
-  index_++;
-  if (index_ >= buffer_size_) {
-    is_full_ = true;
-    index_ = 0;
-  }
-}
-int AgcCircularBuffer::BufferLevel() {
-  if (is_full_)
-    return buffer_size_;
-  return index_;
-}
-
-int AgcCircularBuffer::Get(int index, double* value) const {
-  int err = ConvertToLinearIndex(&index);
-  if (err < 0)
-    return -1;
-  *value = buffer_[index];
-  return 0;
-}
-
-int AgcCircularBuffer::Set(int index, double value) {
-  int err = ConvertToLinearIndex(&index);
-  if (err < 0)
-    return -1;
-
-  sum_ -= buffer_[index];
-  buffer_[index] = value;
-  sum_ += value;
-  return 0;
-}
-
-int AgcCircularBuffer::ConvertToLinearIndex(int* index) const {
-  if (*index < 0 || *index >= buffer_size_)
-    return -1;
-
-  if (!is_full_ && *index >= index_)
-    return -1;
-
-  *index = index_ - 1 - *index;
-  if (*index < 0)
-    *index += buffer_size_;
-  return 0;
-}
-
-int AgcCircularBuffer::RemoveTransient(int width_threshold,
-                                       double val_threshold) {
-  if (!is_full_ && index_ < width_threshold + 2)
-    return 0;
-
-  int index_1 = 0;
-  int index_2 = width_threshold + 1;
-  double v = 0;
-  if (Get(index_1, &v) < 0)
-    return -1;
-  if (v < val_threshold) {
-    Set(index_1, 0);
-    int index;
-    for (index = index_2; index > index_1; index--) {
-      if (Get(index, &v) < 0)
-        return -1;
-      if (v < val_threshold)
-        break;
-    }
-    for (; index > index_1; index--) {
-      if (Set(index, 0.0) < 0)
-        return -1;
-    }
-  }
-  return 0;
-}
-
-}  // namespace webrtc