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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_REFINED_FILTER_UPDATE_GAIN_H_
#define MODULES_AUDIO_PROCESSING_AEC3_REFINED_FILTER_UPDATE_GAIN_H_
#include <stddef.h>
#include <array>
#include <atomic>
#include <memory>
#include "api/array_view.h"
#include "api/audio/echo_canceller3_config.h"
#include "modules/audio_processing/aec3/aec3_common.h"
namespace webrtc {
class AdaptiveFirFilter;
class ApmDataDumper;
struct EchoPathVariability;
struct FftData;
class RenderSignalAnalyzer;
struct SubtractorOutput;
// Provides functionality for computing the adaptive gain for the refined
// filter.
class RefinedFilterUpdateGain {
public:
RefinedFilterUpdateGain(
const EchoCanceller3Config::Filter::RefinedConfiguration& config,
size_t config_change_duration_blocks);
~RefinedFilterUpdateGain();
RefinedFilterUpdateGain(const RefinedFilterUpdateGain&) = delete;
RefinedFilterUpdateGain& operator=(const RefinedFilterUpdateGain&) = delete;
// Takes action in the case of a known echo path change.
void HandleEchoPathChange(const EchoPathVariability& echo_path_variability);
// Computes the gain.
void Compute(const std::array<float, kFftLengthBy2Plus1>& render_power,
const RenderSignalAnalyzer& render_signal_analyzer,
const SubtractorOutput& subtractor_output,
rtc::ArrayView<const float> erl,
size_t size_partitions,
bool saturated_capture_signal,
bool disallow_leakage_diverged,
FftData* gain_fft);
// Sets a new config.
void SetConfig(
const EchoCanceller3Config::Filter::RefinedConfiguration& 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:
static std::atomic<int> instance_count_;
std::unique_ptr<ApmDataDumper> data_dumper_;
const int config_change_duration_blocks_;
float one_by_config_change_duration_blocks_;
EchoCanceller3Config::Filter::RefinedConfiguration current_config_;
EchoCanceller3Config::Filter::RefinedConfiguration target_config_;
EchoCanceller3Config::Filter::RefinedConfiguration old_target_config_;
std::array<float, kFftLengthBy2Plus1> H_error_;
size_t poor_excitation_counter_;
size_t call_counter_ = 0;
int config_change_counter_ = 0;
// Updates the current config towards the target config.
void UpdateCurrentConfig();
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AEC3_REFINED_FILTER_UPDATE_GAIN_H_
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