commit 6df09f6f6a7daf5b6708081f1fb66e711186a306
author Alex Loiko <aleloi@webrtc.org> Fri Feb 16 10:42:48 2018 +0100
committer Commit Bot <commit-bot@chromium.org> Fri Feb 16 10:46:48 2018 +0000
tree a349b4d2b0ba15dac8c231490dde86f645a68931
parent e4be6dad656a36165534b520e4888eb1717dced3

Add decibel conversion functions to //common_audio:common_audio

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}

modules/audio_processing/audio_processing_impl.cc

diff --git a/modules/audio_processing/audio_processing_impl.cc b/modules/audio_processing/audio_processing_impl.cc
index 2c292f7..6275726 100644
--- a/modules/audio_processing/audio_processing_impl.cc
+++ b/modules/audio_processing/audio_processing_impl.cc
@@ -1262,7 +1262,7 @@
     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;