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270f7b5353
In preparation of coming CLs that will add an AGC interface to make the gain controller injectable. This CL simplifies AGC2 (dummy sub-module of audioproc_f) since it only implements the fixed digital mode with hard-clipping - i.e., no limiter is used. The AGC2 config now includes the fixed gain to apply and audioproc_f has been adapted accordingly. Finally, this CL slightly simplifies the AGC2 integration into APM. This CL is a continuation of https://codereview.webrtc.org/2995043002/ Bug: webrtc:7494 Change-Id: I3d554ea4dc6208928352059feb14987edabf14c7 Reviewed-on: https://webrtc-review.googlesource.com/4661 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20278}
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* Copyright (c) 2017 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_AGC2_GAIN_CONTROLLER2_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_
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#include <memory>
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#include <string>
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#include "modules/audio_processing/include/audio_processing.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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class ApmDataDumper;
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class AudioBuffer;
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// Gain Controller 2 aims to automatically adjust levels by acting on the
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// microphone gain and/or applying digital gain.
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//
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// Temporarily implements a fixed gain mode with hard-clipping.
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class GainController2 {
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public:
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GainController2();
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~GainController2();
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void Initialize(int sample_rate_hz);
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void Process(AudioBuffer* audio);
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void ApplyConfig(const AudioProcessing::Config::GainController2& config);
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static bool Validate(const AudioProcessing::Config::GainController2& config);
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static std::string ToString(
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const AudioProcessing::Config::GainController2& config);
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private:
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static int instance_count_;
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std::unique_ptr<ApmDataDumper> data_dumper_;
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int sample_rate_hz_;
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float fixed_gain_;
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RTC_DISALLOW_COPY_AND_ASSIGN(GainController2);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_
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