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/*
* Copyright (c) 2012 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_ECHO_CANCELLATION_IMPL_H_
#define MODULES_AUDIO_PROCESSING_ECHO_CANCELLATION_IMPL_H_
#include <memory>
#include <vector>
#include "modules/audio_processing/include/audio_processing.h"
#include "rtc_base/constructormagic.h"
#include "rtc_base/criticalsection.h"
namespace webrtc {
class AudioBuffer;
class EchoCancellationImpl : public EchoCancellation {
public:
EchoCancellationImpl(rtc::CriticalSection* crit_render,
rtc::CriticalSection* crit_capture);
~EchoCancellationImpl() override;
void ProcessRenderAudio(rtc::ArrayView<const float> packed_render_audio);
int ProcessCaptureAudio(AudioBuffer* audio, int stream_delay_ms);
// EchoCancellation implementation.
bool is_enabled() const override;
int stream_drift_samples() const override;
SuppressionLevel suppression_level() const override;
bool is_drift_compensation_enabled() const override;
void Initialize(int sample_rate_hz,
size_t num_reverse_channels_,
size_t num_output_channels_,
size_t num_proc_channels_);
void SetExtraOptions(const webrtc::Config& config);
bool is_delay_agnostic_enabled() const;
bool is_extended_filter_enabled() const;
std::string GetExperimentsDescription();
bool is_refined_adaptive_filter_enabled() const;
// Returns the system delay of the first AEC component.
int GetSystemDelayInSamples() const;
static void PackRenderAudioBuffer(const AudioBuffer* audio,
size_t num_output_channels,
size_t num_channels,
std::vector<float>* packed_buffer);
static size_t NumCancellersRequired(size_t num_output_channels,
size_t num_reverse_channels);
// Enable logging of various AEC statistics.
int enable_metrics(bool enable) override;
// Provides various statistics about the AEC.
int GetMetrics(Metrics* metrics) override;
// Enable logging of delay metrics.
int enable_delay_logging(bool enable) override;
// Provides delay metrics.
int GetDelayMetrics(int* median,
int* std,
float* fraction_poor_delays) override;
private:
class Canceller;
struct StreamProperties;
// EchoCancellation implementation.
int Enable(bool enable) override;
int enable_drift_compensation(bool enable) override;
void set_stream_drift_samples(int drift) override;
int set_suppression_level(SuppressionLevel level) override;
bool are_metrics_enabled() const override;
bool stream_has_echo() const override;
bool is_delay_logging_enabled() const override;
int GetDelayMetrics(int* median, int* std) override;
struct AecCore* aec_core() const override;
void AllocateRenderQueue();
int Configure();
rtc::CriticalSection* const crit_render_ RTC_ACQUIRED_BEFORE(crit_capture_);
rtc::CriticalSection* const crit_capture_;
bool enabled_ = false;
bool drift_compensation_enabled_ RTC_GUARDED_BY(crit_capture_);
bool metrics_enabled_ RTC_GUARDED_BY(crit_capture_);
SuppressionLevel suppression_level_ RTC_GUARDED_BY(crit_capture_);
int stream_drift_samples_ RTC_GUARDED_BY(crit_capture_);
bool was_stream_drift_set_ RTC_GUARDED_BY(crit_capture_);
bool stream_has_echo_ RTC_GUARDED_BY(crit_capture_);
bool delay_logging_enabled_ RTC_GUARDED_BY(crit_capture_);
bool extended_filter_enabled_ RTC_GUARDED_BY(crit_capture_);
bool delay_agnostic_enabled_ RTC_GUARDED_BY(crit_capture_);
bool refined_adaptive_filter_enabled_ RTC_GUARDED_BY(crit_capture_) = false;
// Only active on Chrome OS devices.
const bool enforce_zero_stream_delay_ RTC_GUARDED_BY(crit_capture_);
std::vector<std::unique_ptr<Canceller>> cancellers_;
std::unique_ptr<StreamProperties> stream_properties_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(EchoCancellationImpl);
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_ECHO_CANCELLATION_IMPL_H_
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