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Add decibel conversion functions to //common_audio:common_audio

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The functions replace some existing code and will be used in the
the new AutomaticGainController.

Bug: webrtc:7949
Change-Id: I9a32132d4a4699a507b8548a2eac10972a2f3fd6
Reviewed-on: https://webrtc-review.googlesource.com/53141
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22045}
This commit is contained in:
Alex Loiko
2018-02-16 10:42:48 +01:00
committed by Commit Bot
parent e4be6dad65
commit 6df09f6f6a
8 changed files with 121 additions and 52 deletions
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2
modules/audio_processing/audio_processing_impl.cc
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@ -1262,7 +1262,7 @@ int AudioProcessingImpl::ProcessCaptureStreamLocked() {
int gain_db = public_submodules_->gain_control->is_enabled() ?
public_submodules_->gain_control->compression_gain_db() :
0;
float gain = std::pow(10.f, gain_db / 20.f);
float gain = DbToRatio(gain_db);
gain *= capture_nonlocked_.level_controller_enabled ?
private_submodules_->level_controller->GetLastGain() :
1.f;