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/*
* Copyright (c) 2017 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_COARSE_FILTER_UPDATE_GAIN_H_
#define MODULES_AUDIO_PROCESSING_AEC3_COARSE_FILTER_UPDATE_GAIN_H_
#include <stddef.h>
#include <array>
#include "api/audio/echo_canceller3_config.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "modules/audio_processing/aec3/fft_data.h"
#include "modules/audio_processing/aec3/render_signal_analyzer.h"
namespace webrtc {
// Provides functionality for computing the fixed gain for the coarse filter.
class CoarseFilterUpdateGain {
public:
explicit CoarseFilterUpdateGain(
const EchoCanceller3Config::Filter::CoarseConfiguration& config,
size_t config_change_duration_blocks);
// Takes action in the case of a known echo path change.
void HandleEchoPathChange();
// Computes the gain.
void Compute(const std::array<float, kFftLengthBy2Plus1>& render_power,
const RenderSignalAnalyzer& render_signal_analyzer,
const FftData& E_coarse,
size_t size_partitions,
bool saturated_capture_signal,
FftData* G);
// Sets a new config.
void SetConfig(
const EchoCanceller3Config::Filter::CoarseConfiguration& config,
bool immediate_effect) {
if (immediate_effect) {
old_target_config_ = current_config_ = target_config_ = config;
config_change_counter_ = 0;
} else {
old_target_config_ = current_config_;
target_config_ = config;
config_change_counter_ = config_change_duration_blocks_;
}
}
private:
EchoCanceller3Config::Filter::CoarseConfiguration current_config_;
EchoCanceller3Config::Filter::CoarseConfiguration target_config_;
EchoCanceller3Config::Filter::CoarseConfiguration old_target_config_;
const int config_change_duration_blocks_;
float one_by_config_change_duration_blocks_;
// TODO(peah): Check whether this counter should instead be initialized to a
// large value.
size_t poor_signal_excitation_counter_ = 0;
size_t call_counter_ = 0;
int config_change_counter_ = 0;
void UpdateCurrentConfig();
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AEC3_COARSE_FILTER_UPDATE_GAIN_H_
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