1 /*
2 * Copyright (c) 2018 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 #include "modules/audio_processing/agc2/adaptive_agc.h"
12
13 #include "common_audio/include/audio_util.h"
14 #include "modules/audio_processing/agc2/vad_with_level.h"
15 #include "modules/audio_processing/logging/apm_data_dumper.h"
16 #include "rtc_base/checks.h"
17
18 namespace webrtc {
19
AdaptiveAgc(ApmDataDumper * apm_data_dumper)20 AdaptiveAgc::AdaptiveAgc(ApmDataDumper* apm_data_dumper)
21 : speech_level_estimator_(apm_data_dumper),
22 gain_applier_(apm_data_dumper),
23 apm_data_dumper_(apm_data_dumper),
24 noise_level_estimator_(apm_data_dumper) {
25 RTC_DCHECK(apm_data_dumper);
26 }
27
AdaptiveAgc(ApmDataDumper * apm_data_dumper,const AudioProcessing::Config::GainController2 & config)28 AdaptiveAgc::AdaptiveAgc(ApmDataDumper* apm_data_dumper,
29 const AudioProcessing::Config::GainController2& config)
30 : speech_level_estimator_(
31 apm_data_dumper,
32 config.adaptive_digital.level_estimator,
33 config.adaptive_digital.use_saturation_protector,
34 config.adaptive_digital.extra_saturation_margin_db),
35 gain_applier_(apm_data_dumper),
36 apm_data_dumper_(apm_data_dumper),
37 noise_level_estimator_(apm_data_dumper) {
38 RTC_DCHECK(apm_data_dumper);
39 }
40
41 AdaptiveAgc::~AdaptiveAgc() = default;
42
Process(AudioFrameView<float> float_frame,float last_audio_level)43 void AdaptiveAgc::Process(AudioFrameView<float> float_frame,
44 float last_audio_level) {
45 auto signal_with_levels = SignalWithLevels(float_frame);
46 signal_with_levels.vad_result = vad_.AnalyzeFrame(float_frame);
47 apm_data_dumper_->DumpRaw("agc2_vad_probability",
48 signal_with_levels.vad_result.speech_probability);
49 apm_data_dumper_->DumpRaw("agc2_vad_rms_dbfs",
50 signal_with_levels.vad_result.speech_rms_dbfs);
51 apm_data_dumper_->DumpRaw("agc2_vad_peak_dbfs",
52 signal_with_levels.vad_result.speech_peak_dbfs);
53
54 speech_level_estimator_.UpdateEstimation(signal_with_levels.vad_result);
55
56 signal_with_levels.input_level_dbfs =
57 speech_level_estimator_.LatestLevelEstimate();
58
59 signal_with_levels.input_noise_level_dbfs =
60 noise_level_estimator_.Analyze(float_frame);
61
62 apm_data_dumper_->DumpRaw("agc2_noise_estimate_dbfs",
63 signal_with_levels.input_noise_level_dbfs);
64
65 signal_with_levels.limiter_audio_level_dbfs =
66 last_audio_level > 0 ? FloatS16ToDbfs(last_audio_level) : -90.f;
67 apm_data_dumper_->DumpRaw("agc2_last_limiter_audio_level",
68 signal_with_levels.limiter_audio_level_dbfs);
69
70 signal_with_levels.estimate_is_confident =
71 speech_level_estimator_.LevelEstimationIsConfident();
72
73 // The gain applier applies the gain.
74 gain_applier_.Process(signal_with_levels);
75 }
76
Reset()77 void AdaptiveAgc::Reset() {
78 speech_level_estimator_.Reset();
79 }
80
81 } // namespace webrtc
82