87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
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#define MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "api/array_view.h"
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namespace webrtc {
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class AudioBuffer;
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// The acoustic echo control for mobile (AECM) component is a low complexity
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// robust option intended for use on mobile devices.
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class EchoControlMobileImpl {
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public:
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EchoControlMobileImpl();
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~EchoControlMobileImpl();
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// Recommended settings for particular audio routes. In general, the louder
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// the echo is expected to be, the higher this value should be set. The
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// preferred setting may vary from device to device.
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enum RoutingMode {
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kQuietEarpieceOrHeadset,
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kEarpiece,
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kLoudEarpiece,
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kSpeakerphone,
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kLoudSpeakerphone
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};
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// Sets echo control appropriate for the audio routing `mode` on the device.
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// It can and should be updated during a call if the audio routing changes.
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int set_routing_mode(RoutingMode mode);
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RoutingMode routing_mode() const;
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// Comfort noise replaces suppressed background noise to maintain a
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// consistent signal level.
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int enable_comfort_noise(bool enable);
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bool is_comfort_noise_enabled() const;
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void ProcessRenderAudio(rtc::ArrayView<const int16_t> packed_render_audio);
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int ProcessCaptureAudio(AudioBuffer* audio, int stream_delay_ms);
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void Initialize(int sample_rate_hz,
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size_t num_reverse_channels,
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size_t num_output_channels);
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static void PackRenderAudioBuffer(const AudioBuffer* audio,
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size_t num_output_channels,
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size_t num_channels,
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std::vector<int16_t>* packed_buffer);
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static size_t NumCancellersRequired(size_t num_output_channels,
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size_t num_reverse_channels);
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private:
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class Canceller;
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struct StreamProperties;
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int Configure();
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RoutingMode routing_mode_;
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bool comfort_noise_enabled_;
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std::vector<std::unique_ptr<Canceller>> cancellers_;
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std::unique_ptr<StreamProperties> stream_properties_;
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std::vector<std::array<int16_t, 160>> low_pass_reference_;
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bool reference_copied_ = false;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
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