87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*
|
|
* 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_CONTROL_MOBILE_IMPL_H_
|
|
#define MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "api/array_view.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class AudioBuffer;
|
|
|
|
// The acoustic echo control for mobile (AECM) component is a low complexity
|
|
// robust option intended for use on mobile devices.
|
|
class EchoControlMobileImpl {
|
|
public:
|
|
EchoControlMobileImpl();
|
|
|
|
~EchoControlMobileImpl();
|
|
|
|
// Recommended settings for particular audio routes. In general, the louder
|
|
// the echo is expected to be, the higher this value should be set. The
|
|
// preferred setting may vary from device to device.
|
|
enum RoutingMode {
|
|
kQuietEarpieceOrHeadset,
|
|
kEarpiece,
|
|
kLoudEarpiece,
|
|
kSpeakerphone,
|
|
kLoudSpeakerphone
|
|
};
|
|
|
|
// Sets echo control appropriate for the audio routing `mode` on the device.
|
|
// It can and should be updated during a call if the audio routing changes.
|
|
int set_routing_mode(RoutingMode mode);
|
|
RoutingMode routing_mode() const;
|
|
|
|
// Comfort noise replaces suppressed background noise to maintain a
|
|
// consistent signal level.
|
|
int enable_comfort_noise(bool enable);
|
|
bool is_comfort_noise_enabled() const;
|
|
|
|
void ProcessRenderAudio(rtc::ArrayView<const int16_t> packed_render_audio);
|
|
int ProcessCaptureAudio(AudioBuffer* audio, int stream_delay_ms);
|
|
|
|
void Initialize(int sample_rate_hz,
|
|
size_t num_reverse_channels,
|
|
size_t num_output_channels);
|
|
|
|
static void PackRenderAudioBuffer(const AudioBuffer* audio,
|
|
size_t num_output_channels,
|
|
size_t num_channels,
|
|
std::vector<int16_t>* packed_buffer);
|
|
|
|
static size_t NumCancellersRequired(size_t num_output_channels,
|
|
size_t num_reverse_channels);
|
|
|
|
private:
|
|
class Canceller;
|
|
struct StreamProperties;
|
|
|
|
int Configure();
|
|
|
|
RoutingMode routing_mode_;
|
|
bool comfort_noise_enabled_;
|
|
|
|
std::vector<std::unique_ptr<Canceller>> cancellers_;
|
|
std::unique_ptr<StreamProperties> stream_properties_;
|
|
std::vector<std::array<int16_t, 160>> low_pass_reference_;
|
|
bool reference_copied_ = false;
|
|
};
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
|