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/*
* 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 "modules/audio_processing/aec3/frame_blocker.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "rtc_base/checks.h"
namespace webrtc {
FrameBlocker::FrameBlocker(size_t num_bands, size_t num_channels)
: num_bands_(num_bands),
num_channels_(num_channels),
buffer_(num_bands_, std::vector<std::vector<float>>(num_channels)) {
RTC_DCHECK_LT(0, num_bands);
RTC_DCHECK_LT(0, num_channels);
for (auto& band : buffer_) {
for (auto& channel : band) {
channel.reserve(kBlockSize);
RTC_DCHECK(channel.empty());
}
}
}
FrameBlocker::~FrameBlocker() = default;
void FrameBlocker::InsertSubFrameAndExtractBlock(
const std::vector<std::vector<rtc::ArrayView<float>>>& sub_frame,
Block* block) {
RTC_DCHECK(block);
RTC_DCHECK_EQ(num_bands_, block->NumBands());
RTC_DCHECK_EQ(num_bands_, sub_frame.size());
for (size_t band = 0; band < num_bands_; ++band) {
RTC_DCHECK_EQ(num_channels_, block->NumChannels());
RTC_DCHECK_EQ(num_channels_, sub_frame[band].size());
for (size_t channel = 0; channel < num_channels_; ++channel) {
RTC_DCHECK_GE(kBlockSize - 16, buffer_[band][channel].size());
RTC_DCHECK_EQ(kSubFrameLength, sub_frame[band][channel].size());
const int samples_to_block = kBlockSize - buffer_[band][channel].size();
std::copy(buffer_[band][channel].begin(), buffer_[band][channel].end(),
block->begin(band, channel));
std::copy(sub_frame[band][channel].begin(),
sub_frame[band][channel].begin() + samples_to_block,
block->begin(band, channel) + kBlockSize - samples_to_block);
buffer_[band][channel].clear();
buffer_[band][channel].insert(
buffer_[band][channel].begin(),
sub_frame[band][channel].begin() + samples_to_block,
sub_frame[band][channel].end());
}
}
}
bool FrameBlocker::IsBlockAvailable() const {
return kBlockSize == buffer_[0][0].size();
}
void FrameBlocker::ExtractBlock(Block* block) {
RTC_DCHECK(block);
RTC_DCHECK_EQ(num_bands_, block->NumBands());
RTC_DCHECK_EQ(num_channels_, block->NumChannels());
RTC_DCHECK(IsBlockAvailable());
for (size_t band = 0; band < num_bands_; ++band) {
for (size_t channel = 0; channel < num_channels_; ++channel) {
RTC_DCHECK_EQ(kBlockSize, buffer_[band][channel].size());
std::copy(buffer_[band][channel].begin(), buffer_[band][channel].end(),
block->begin(band, channel));
buffer_[band][channel].clear();
}
}
}
} // namespace webrtc
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