Revert of Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/frame_blocker.cc

-/*
- *  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.
- */
-
-#include "webrtc/modules/audio_processing/aec3/frame_blocker.h"
-
-#include <algorithm>
-
-#include "webrtc/base/checks.h"
-#include "webrtc/modules/audio_processing/aec3/aec3_constants.h"
-
-namespace webrtc {
-
-FrameBlocker::FrameBlocker(size_t num_bands)
-    : num_bands_(num_bands), buffer_(num_bands_) {
-  for (auto& b : buffer_) {
-    b.reserve(kBlockSize);
-    RTC_DCHECK(b.empty());
-  }
-}
-
-FrameBlocker::~FrameBlocker() = default;
-
-void FrameBlocker::InsertSubFrameAndExtractBlock(
-    const std::vector<rtc::ArrayView<float>>& sub_frame,
-    std::vector<std::vector<float>>* block) {
-  RTC_DCHECK(block);
-  RTC_DCHECK_EQ(num_bands_, block->size());
-  RTC_DCHECK_EQ(num_bands_, sub_frame.size());
-  for (size_t i = 0; i < num_bands_; ++i) {
-    RTC_DCHECK_GE(kBlockSize - 16, buffer_[i].size());
-    RTC_DCHECK_EQ(kBlockSize, (*block)[i].size());
-    RTC_DCHECK_EQ(kSubFrameLength, sub_frame[i].size());
-    const int samples_to_block = kBlockSize - buffer_[i].size();
-    (*block)[i].clear();
-    (*block)[i].insert((*block)[i].begin(), buffer_[i].begin(),
-                       buffer_[i].end());
-    (*block)[i].insert((*block)[i].begin() + buffer_[i].size(),
-                       sub_frame[i].begin(),
-                       sub_frame[i].begin() + samples_to_block);
-    buffer_[i].clear();
-    buffer_[i].insert(buffer_[i].begin(),
-                      sub_frame[i].begin() + samples_to_block,
-                      sub_frame[i].end());
-  }
-}
-
-bool FrameBlocker::IsBlockAvailable() const {
-  return kBlockSize == buffer_[0].size();
-}
-
-void FrameBlocker::ExtractBlock(std::vector<std::vector<float>>* block) {
-  RTC_DCHECK(block);
-  RTC_DCHECK_EQ(num_bands_, block->size());
-  RTC_DCHECK(IsBlockAvailable());
-  for (size_t i = 0; i < num_bands_; ++i) {
-    RTC_DCHECK_EQ(kBlockSize, buffer_[i].size());
-    RTC_DCHECK_EQ(kBlockSize, (*block)[i].size());
-    (*block)[i].clear();
-    (*block)[i].insert((*block)[i].begin(), buffer_[i].begin(),
-                       buffer_[i].end());
-    buffer_[i].clear();
-  }
-}
-
-}  // namespace webrtc