1/*
2 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_ECHO_CANCELLATION_IMPL_H_
12#define WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_ECHO_CANCELLATION_IMPL_H_
13
14#include "audio_processing.h"
15#include "processing_component.h"
16
17namespace webrtc {
18class AudioProcessingImpl;
19class AudioBuffer;
20
21class EchoCancellationImpl : public EchoCancellation,
22                             public ProcessingComponent {
23 public:
24  explicit EchoCancellationImpl(const AudioProcessingImpl* apm);
25  virtual ~EchoCancellationImpl();
26
27  int ProcessRenderAudio(const AudioBuffer* audio);
28  int ProcessCaptureAudio(AudioBuffer* audio);
29
30  // EchoCancellation implementation.
31  virtual bool is_enabled() const;
32  virtual int device_sample_rate_hz() const;
33  virtual int stream_drift_samples() const;
34
35  // ProcessingComponent implementation.
36  virtual int Initialize();
37  virtual int get_version(char* version, int version_len_bytes) const;
38
39 private:
40  // EchoCancellation implementation.
41  virtual int Enable(bool enable);
42  virtual int enable_drift_compensation(bool enable);
43  virtual bool is_drift_compensation_enabled() const;
44  virtual int set_device_sample_rate_hz(int rate);
45  virtual int set_stream_drift_samples(int drift);
46  virtual int set_suppression_level(SuppressionLevel level);
47  virtual SuppressionLevel suppression_level() const;
48  virtual int enable_metrics(bool enable);
49  virtual bool are_metrics_enabled() const;
50  virtual bool stream_has_echo() const;
51  virtual int GetMetrics(Metrics* metrics);
52  virtual int enable_delay_logging(bool enable);
53  virtual bool is_delay_logging_enabled() const;
54  virtual int GetDelayMetrics(int* median, int* std);
55
56  // ProcessingComponent implementation.
57  virtual void* CreateHandle() const;
58  virtual int InitializeHandle(void* handle) const;
59  virtual int ConfigureHandle(void* handle) const;
60  virtual int DestroyHandle(void* handle) const;
61  virtual int num_handles_required() const;
62  virtual int GetHandleError(void* handle) const;
63
64  const AudioProcessingImpl* apm_;
65  bool drift_compensation_enabled_;
66  bool metrics_enabled_;
67  SuppressionLevel suppression_level_;
68  int device_sample_rate_hz_;
69  int stream_drift_samples_;
70  bool was_stream_drift_set_;
71  bool stream_has_echo_;
72  bool delay_logging_enabled_;
73};
74}  // namespace webrtc
75
76#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_MAIN_SOURCE_ECHO_CANCELLATION_IMPL_H_
77