61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
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/*
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* Copyright (c) 2017 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_FFT_BUFFER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_FFT_BUFFER_H_
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#include <stddef.h>
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#include <vector>
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#include "modules/audio_processing/aec3/fft_data.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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// Struct for bundling a circular buffer of FftData objects together with the
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// read and write indices.
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struct FftBuffer {
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FftBuffer(size_t size, size_t num_channels);
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~FftBuffer();
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int IncIndex(int index) const {
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RTC_DCHECK_EQ(buffer.size(), static_cast<size_t>(size));
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return index < size - 1 ? index + 1 : 0;
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}
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int DecIndex(int index) const {
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RTC_DCHECK_EQ(buffer.size(), static_cast<size_t>(size));
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return index > 0 ? index - 1 : size - 1;
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}
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int OffsetIndex(int index, int offset) const {
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RTC_DCHECK_GE(buffer.size(), offset);
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RTC_DCHECK_EQ(buffer.size(), static_cast<size_t>(size));
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return (size + index + offset) % size;
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}
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void UpdateWriteIndex(int offset) { write = OffsetIndex(write, offset); }
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void IncWriteIndex() { write = IncIndex(write); }
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void DecWriteIndex() { write = DecIndex(write); }
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void UpdateReadIndex(int offset) { read = OffsetIndex(read, offset); }
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void IncReadIndex() { read = IncIndex(read); }
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void DecReadIndex() { read = DecIndex(read); }
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const int size;
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std::vector<std::vector<FftData>> buffer;
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int write = 0;
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int read = 0;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_FFT_BUFFER_H_
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