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0e6d2f5118
This CL corrects the way that the estimated filter delay is used in AEC3. In particular -It uses the filter delay to choose the correct render block in AecState -It changes the code to reflect that the filter delay is always computed -It removes part of the code that formerly relied on the filter delay being an Optional. Bug: webrtc:8671 Change-Id: I58135a5c174b404707e19a41c3617c09831e871d Reviewed-on: https://webrtc-review.googlesource.com/35221 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21557}
120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
/*
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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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#ifndef MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_
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#include <stddef.h>
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#include "typedefs.h" // NOLINT(build/include)
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namespace webrtc {
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#ifdef _MSC_VER /* visual c++ */
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#define ALIGN16_BEG __declspec(align(16))
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#define ALIGN16_END
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#else /* gcc or icc */
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#define ALIGN16_BEG
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#define ALIGN16_END __attribute__((aligned(16)))
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#endif
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enum class Aec3Optimization { kNone, kSse2, kNeon };
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constexpr int kNumBlocksPerSecond = 250;
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constexpr int kMetricsReportingIntervalBlocks = 10 * kNumBlocksPerSecond;
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constexpr int kMetricsComputationBlocks = 11;
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constexpr int kMetricsCollectionBlocks =
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kMetricsReportingIntervalBlocks - kMetricsComputationBlocks;
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constexpr size_t kFftLengthBy2 = 64;
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constexpr size_t kFftLengthBy2Plus1 = kFftLengthBy2 + 1;
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constexpr size_t kFftLengthBy2Minus1 = kFftLengthBy2 - 1;
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constexpr size_t kFftLength = 2 * kFftLengthBy2;
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constexpr int kMaxAdaptiveFilterLength = 50;
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constexpr int kRenderTransferQueueSizeFrames = 100;
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constexpr size_t kMaxNumBands = 3;
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constexpr size_t kSubFrameLength = 80;
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constexpr size_t kBlockSize = kFftLengthBy2;
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constexpr size_t kBlockSizeLog2 = 6;
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constexpr size_t kExtendedBlockSize = 2 * kFftLengthBy2;
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constexpr size_t kMatchedFilterWindowSizeSubBlocks = 32;
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constexpr size_t kMatchedFilterAlignmentShiftSizeSubBlocks =
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kMatchedFilterWindowSizeSubBlocks * 3 / 4;
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// TODO(peah): Integrate this with how it is done inside audio_processing_impl.
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constexpr size_t NumBandsForRate(int sample_rate_hz) {
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return static_cast<size_t>(sample_rate_hz == 8000 ? 1
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: sample_rate_hz / 16000);
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}
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constexpr int LowestBandRate(int sample_rate_hz) {
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return sample_rate_hz == 8000 ? sample_rate_hz : 16000;
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}
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constexpr bool ValidFullBandRate(int sample_rate_hz) {
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return sample_rate_hz == 8000 || sample_rate_hz == 16000 ||
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sample_rate_hz == 32000 || sample_rate_hz == 48000;
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}
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constexpr int GetTimeDomainLength(int filter_length_blocks) {
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return filter_length_blocks * kFftLengthBy2;
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}
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constexpr size_t GetDownSampledBufferSize(size_t down_sampling_factor,
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size_t num_matched_filters) {
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return kBlockSize / down_sampling_factor *
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(kMatchedFilterAlignmentShiftSizeSubBlocks * num_matched_filters +
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kMatchedFilterWindowSizeSubBlocks + 1);
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}
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constexpr size_t GetRenderDelayBufferSize(size_t down_sampling_factor,
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size_t num_matched_filters,
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size_t filter_length_blocks) {
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return GetDownSampledBufferSize(down_sampling_factor, num_matched_filters) /
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(kBlockSize / down_sampling_factor) +
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filter_length_blocks + 1;
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}
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// Detects what kind of optimizations to use for the code.
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Aec3Optimization DetectOptimization();
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static_assert(1 << kBlockSizeLog2 == kBlockSize,
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"Proper number of shifts for blocksize");
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static_assert(1 == NumBandsForRate(8000), "Number of bands for 8 kHz");
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static_assert(1 == NumBandsForRate(16000), "Number of bands for 16 kHz");
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static_assert(2 == NumBandsForRate(32000), "Number of bands for 32 kHz");
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static_assert(3 == NumBandsForRate(48000), "Number of bands for 48 kHz");
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static_assert(8000 == LowestBandRate(8000), "Sample rate of band 0 for 8 kHz");
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static_assert(16000 == LowestBandRate(16000),
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"Sample rate of band 0 for 16 kHz");
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static_assert(16000 == LowestBandRate(32000),
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"Sample rate of band 0 for 32 kHz");
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static_assert(16000 == LowestBandRate(48000),
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"Sample rate of band 0 for 48 kHz");
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static_assert(ValidFullBandRate(8000),
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"Test that 8 kHz is a valid sample rate");
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static_assert(ValidFullBandRate(16000),
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"Test that 16 kHz is a valid sample rate");
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static_assert(ValidFullBandRate(32000),
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"Test that 32 kHz is a valid sample rate");
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static_assert(ValidFullBandRate(48000),
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"Test that 48 kHz is a valid sample rate");
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static_assert(!ValidFullBandRate(8001),
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"Test that 8001 Hz is not a valid sample rate");
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_
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