92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2022 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.
|
|
*/
|
|
|
|
#ifndef MODULES_AUDIO_PROCESSING_AEC3_BLOCK_H_
|
|
#define MODULES_AUDIO_PROCESSING_AEC3_BLOCK_H_
|
|
|
|
#include <array>
|
|
#include <vector>
|
|
|
|
#include "api/array_view.h"
|
|
#include "modules/audio_processing/aec3/aec3_common.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// Contains one or more channels of 4 milliseconds of audio data.
|
|
// The audio is split in one or more frequency bands, each with a sampling
|
|
// rate of 16 kHz.
|
|
class Block {
|
|
public:
|
|
Block(int num_bands, int num_channels, float default_value = 0.0f)
|
|
: num_bands_(num_bands),
|
|
num_channels_(num_channels),
|
|
data_(num_bands * num_channels * kBlockSize, default_value) {}
|
|
|
|
// Returns the number of bands.
|
|
int NumBands() const { return num_bands_; }
|
|
|
|
// Returns the number of channels.
|
|
int NumChannels() const { return num_channels_; }
|
|
|
|
// Modifies the number of channels and sets all samples to zero.
|
|
void SetNumChannels(int num_channels) {
|
|
num_channels_ = num_channels;
|
|
data_.resize(num_bands_ * num_channels_ * kBlockSize);
|
|
std::fill(data_.begin(), data_.end(), 0.0f);
|
|
}
|
|
|
|
// Iterators for accessing the data.
|
|
auto begin(int band, int channel) {
|
|
return data_.begin() + GetIndex(band, channel);
|
|
}
|
|
|
|
auto begin(int band, int channel) const {
|
|
return data_.begin() + GetIndex(band, channel);
|
|
}
|
|
|
|
auto end(int band, int channel) { return begin(band, channel) + kBlockSize; }
|
|
|
|
auto end(int band, int channel) const {
|
|
return begin(band, channel) + kBlockSize;
|
|
}
|
|
|
|
// Access data via ArrayView.
|
|
rtc::ArrayView<float, kBlockSize> View(int band, int channel) {
|
|
return rtc::ArrayView<float, kBlockSize>(&data_[GetIndex(band, channel)],
|
|
kBlockSize);
|
|
}
|
|
|
|
rtc::ArrayView<const float, kBlockSize> View(int band, int channel) const {
|
|
return rtc::ArrayView<const float, kBlockSize>(
|
|
&data_[GetIndex(band, channel)], kBlockSize);
|
|
}
|
|
|
|
// Lets two Blocks swap audio data.
|
|
void Swap(Block& b) {
|
|
std::swap(num_bands_, b.num_bands_);
|
|
std::swap(num_channels_, b.num_channels_);
|
|
data_.swap(b.data_);
|
|
}
|
|
|
|
private:
|
|
// Returns the index of the first sample of the requested |band| and
|
|
// |channel|.
|
|
int GetIndex(int band, int channel) const {
|
|
return (band * num_channels_ + channel) * kBlockSize;
|
|
}
|
|
|
|
int num_bands_;
|
|
int num_channels_;
|
|
std::vector<float> data_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
#endif // MODULES_AUDIO_PROCESSING_AEC3_BLOCK_H_
|