1 /*
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "modules/audio_processing/aec3/frame_blocker.h"
12
13 #include "modules/audio_processing/aec3/aec3_common.h"
14 #include "rtc_base/checks.h"
15
16 namespace webrtc {
17
FrameBlocker(size_t num_bands,size_t num_channels)18 FrameBlocker::FrameBlocker(size_t num_bands, size_t num_channels)
19 : num_bands_(num_bands),
20 num_channels_(num_channels),
21 buffer_(num_bands_, std::vector<std::vector<float>>(num_channels)) {
22 RTC_DCHECK_LT(0, num_bands);
23 RTC_DCHECK_LT(0, num_channels);
24 for (auto& band : buffer_) {
25 for (auto& channel : band) {
26 channel.reserve(kBlockSize);
27 RTC_DCHECK(channel.empty());
28 }
29 }
30 }
31
32 FrameBlocker::~FrameBlocker() = default;
33
InsertSubFrameAndExtractBlock(const std::vector<std::vector<rtc::ArrayView<float>>> & sub_frame,Block * block)34 void FrameBlocker::InsertSubFrameAndExtractBlock(
35 const std::vector<std::vector<rtc::ArrayView<float>>>& sub_frame,
36 Block* block) {
37 RTC_DCHECK(block);
38 RTC_DCHECK_EQ(num_bands_, block->NumBands());
39 RTC_DCHECK_EQ(num_bands_, sub_frame.size());
40 for (size_t band = 0; band < num_bands_; ++band) {
41 RTC_DCHECK_EQ(num_channels_, block->NumChannels());
42 RTC_DCHECK_EQ(num_channels_, sub_frame[band].size());
43 for (size_t channel = 0; channel < num_channels_; ++channel) {
44 RTC_DCHECK_GE(kBlockSize - 16, buffer_[band][channel].size());
45 RTC_DCHECK_EQ(kSubFrameLength, sub_frame[band][channel].size());
46 const int samples_to_block = kBlockSize - buffer_[band][channel].size();
47 std::copy(buffer_[band][channel].begin(), buffer_[band][channel].end(),
48 block->begin(band, channel));
49 std::copy(sub_frame[band][channel].begin(),
50 sub_frame[band][channel].begin() + samples_to_block,
51 block->begin(band, channel) + kBlockSize - samples_to_block);
52 buffer_[band][channel].clear();
53 buffer_[band][channel].insert(
54 buffer_[band][channel].begin(),
55 sub_frame[band][channel].begin() + samples_to_block,
56 sub_frame[band][channel].end());
57 }
58 }
59 }
60
IsBlockAvailable() const61 bool FrameBlocker::IsBlockAvailable() const {
62 return kBlockSize == buffer_[0][0].size();
63 }
64
ExtractBlock(Block * block)65 void FrameBlocker::ExtractBlock(Block* block) {
66 RTC_DCHECK(block);
67 RTC_DCHECK_EQ(num_bands_, block->NumBands());
68 RTC_DCHECK_EQ(num_channels_, block->NumChannels());
69 RTC_DCHECK(IsBlockAvailable());
70 for (size_t band = 0; band < num_bands_; ++band) {
71 for (size_t channel = 0; channel < num_channels_; ++channel) {
72 RTC_DCHECK_EQ(kBlockSize, buffer_[band][channel].size());
73 std::copy(buffer_[band][channel].begin(), buffer_[band][channel].end(),
74 block->begin(band, channel));
75 buffer_[band][channel].clear();
76 }
77 }
78 }
79
80 } // namespace webrtc
81