71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
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/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_processing/aec3/frame_blocker.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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FrameBlocker::FrameBlocker(size_t num_bands)
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: num_bands_(num_bands), buffer_(num_bands_) {
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for (auto& b : buffer_) {
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b.reserve(kBlockSize);
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RTC_DCHECK(b.empty());
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}
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}
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FrameBlocker::~FrameBlocker() = default;
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void FrameBlocker::InsertSubFrameAndExtractBlock(
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const std::vector<rtc::ArrayView<float>>& sub_frame,
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std::vector<std::vector<float>>* block) {
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RTC_DCHECK(block);
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RTC_DCHECK_EQ(num_bands_, block->size());
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RTC_DCHECK_EQ(num_bands_, sub_frame.size());
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for (size_t i = 0; i < num_bands_; ++i) {
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RTC_DCHECK_GE(kBlockSize - 16, buffer_[i].size());
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RTC_DCHECK_EQ(kBlockSize, (*block)[i].size());
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RTC_DCHECK_EQ(kSubFrameLength, sub_frame[i].size());
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const int samples_to_block = kBlockSize - buffer_[i].size();
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(*block)[i].clear();
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(*block)[i].insert((*block)[i].begin(), buffer_[i].begin(),
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buffer_[i].end());
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(*block)[i].insert((*block)[i].begin() + buffer_[i].size(),
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sub_frame[i].begin(),
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sub_frame[i].begin() + samples_to_block);
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buffer_[i].clear();
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buffer_[i].insert(buffer_[i].begin(),
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sub_frame[i].begin() + samples_to_block,
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sub_frame[i].end());
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}
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}
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bool FrameBlocker::IsBlockAvailable() const {
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return kBlockSize == buffer_[0].size();
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}
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void FrameBlocker::ExtractBlock(std::vector<std::vector<float>>* block) {
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RTC_DCHECK(block);
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RTC_DCHECK_EQ(num_bands_, block->size());
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RTC_DCHECK(IsBlockAvailable());
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for (size_t i = 0; i < num_bands_; ++i) {
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RTC_DCHECK_EQ(kBlockSize, buffer_[i].size());
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RTC_DCHECK_EQ(kBlockSize, (*block)[i].size());
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(*block)[i].clear();
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(*block)[i].insert((*block)[i].begin(), buffer_[i].begin(),
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buffer_[i].end());
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buffer_[i].clear();
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}
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}
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} // namespace webrtc
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