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dc872b6be1
Bug: webrtc:9193,chromium:836790 Change-Id: I589082a18a4a5d1ba5abc170b6cf49d1f545b6cc Reviewed-on: https://webrtc-review.googlesource.com/72480 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23027}
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/*
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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_RENDER_BUFFER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_RENDER_BUFFER_H_
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#include <array>
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#include <memory>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/fft_buffer.h"
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#include "modules/audio_processing/aec3/fft_data.h"
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#include "modules/audio_processing/aec3/matrix_buffer.h"
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#include "modules/audio_processing/aec3/vector_buffer.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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// Provides a buffer of the render data for the echo remover.
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class RenderBuffer {
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public:
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RenderBuffer(MatrixBuffer* block_buffer,
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VectorBuffer* spectrum_buffer,
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FftBuffer* fft_buffer);
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~RenderBuffer();
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// Get a block.
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const std::vector<std::vector<float>>& Block(int buffer_offset_blocks) const {
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int position =
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block_buffer_->OffsetIndex(block_buffer_->read, buffer_offset_blocks);
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return block_buffer_->buffer[position];
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}
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// Get the spectrum from one of the FFTs in the buffer.
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rtc::ArrayView<const float> Spectrum(int buffer_offset_ffts) const {
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int position = spectrum_buffer_->OffsetIndex(spectrum_buffer_->read,
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buffer_offset_ffts);
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return spectrum_buffer_->buffer[position];
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}
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// Get the spectrum directly from a position in the buffer.
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rtc::ArrayView<const float> SpectrumFromPosition(int position) const {
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RTC_CHECK_LT(position, spectrum_buffer_->size);
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int position_bound = std::min(position, spectrum_buffer_->size - 1);
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position_bound = std::max(0, position_bound);
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return spectrum_buffer_->buffer[position_bound];
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}
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// Returns the circular fft buffer.
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rtc::ArrayView<const FftData> GetFftBuffer() const {
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return fft_buffer_->buffer;
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}
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// Returns the current position in the circular buffer.
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size_t Position() const {
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RTC_DCHECK_EQ(spectrum_buffer_->read, fft_buffer_->read);
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RTC_DCHECK_EQ(spectrum_buffer_->write, fft_buffer_->write);
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return fft_buffer_->read;
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}
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// Returns the write postion in the circular buffer.
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int GetWritePositionSpectrum() const { return spectrum_buffer_->write; }
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// Returns the sum of the spectrums for a certain number of FFTs.
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void SpectralSum(size_t num_spectra,
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std::array<float, kFftLengthBy2Plus1>* X2) const;
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// Gets the recent activity seen in the render signal.
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bool GetRenderActivity() const { return render_activity_; }
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// Specifies the recent activity seen in the render signal.
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void SetRenderActivity(bool activity) { render_activity_ = activity; }
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// Returns the headroom between the write and the read positions in the
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// buffer;
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int Headroom() const {
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// The write and read indices are decreased over time.
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int headroom =
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fft_buffer_->write < fft_buffer_->read
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? fft_buffer_->read - fft_buffer_->write
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: fft_buffer_->size - fft_buffer_->write + fft_buffer_->read;
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RTC_DCHECK_LE(0, headroom);
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RTC_DCHECK_GE(fft_buffer_->size, headroom);
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return headroom;
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}
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// Decrease an index that is used for accessing the buffer.
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int DecIdx(int idx) const { return spectrum_buffer_->DecIndex(idx); }
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private:
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const MatrixBuffer* const block_buffer_;
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const VectorBuffer* const spectrum_buffer_;
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const FftBuffer* const fft_buffer_;
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bool render_activity_ = false;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RenderBuffer);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_RENDER_BUFFER_H_
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