Revert of Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/block_framer.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/block_framer.h"
-
-#include <algorithm>
-
-#include "webrtc/base/checks.h"
-
-namespace webrtc {
-
-BlockFramer::BlockFramer(size_t num_bands)
-    : num_bands_(num_bands),
-      buffer_(num_bands_, std::vector<float>(kBlockSize, 0.f)) {}
-
-BlockFramer::~BlockFramer() = default;
-
-// All the constants are chosen so that the buffer is either empty or has enough
-// samples for InsertBlockAndExtractSubFrame to produce a frame. In order to
-// achieve this, the InsertBlockAndExtractSubFrame and InsertBlock methods need
-// to be called in the correct order.
-void BlockFramer::InsertBlock(const std::vector<std::vector<float>>& block) {
-  RTC_DCHECK_EQ(num_bands_, block.size());
-  for (size_t i = 0; i < num_bands_; ++i) {
-    RTC_DCHECK_EQ(kBlockSize, block[i].size());
-    RTC_DCHECK_EQ(0, buffer_[i].size());
-    buffer_[i].insert(buffer_[i].begin(), block[i].begin(), block[i].end());
-  }
-}
-
-void BlockFramer::InsertBlockAndExtractSubFrame(
-    const std::vector<std::vector<float>>& block,
-    std::vector<rtc::ArrayView<float>>* sub_frame) {
-  RTC_DCHECK(sub_frame);
-  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_LE(kSubFrameLength, buffer_[i].size() + kBlockSize);
-    RTC_DCHECK_EQ(kBlockSize, block[i].size());
-    RTC_DCHECK_GE(kBlockSize, buffer_[i].size());
-    RTC_DCHECK_EQ(kSubFrameLength, (*sub_frame)[i].size());
-    const int samples_to_frame = kSubFrameLength - buffer_[i].size();
-    std::copy(buffer_[i].begin(), buffer_[i].end(), (*sub_frame)[i].begin());
-    std::copy(block[i].begin(), block[i].begin() + samples_to_frame,
-              (*sub_frame)[i].begin() + buffer_[i].size());
-    buffer_[i].clear();
-    buffer_[i].insert(buffer_[i].begin(), block[i].begin() + samples_to_frame,
-                      block[i].end());
-  }
-}
-
-}  // namespace webrtc