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Set a positive initial gain in the Adaptive Digital GC.

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If the adaptive gain is too low, we raise it slowly and only during
speech.

The CL gives better behavior at the start of a call. If the gain is too
high, the fixed-digital limits it. The gain is also quickly reduced by
the AdaptiveGainApplier.

Bug: webrtc:7494
Change-Id: I683f1e3e463cddec2d91f6c7f15c73e744430034
Reviewed-on: https://webrtc-review.googlesource.com/71484
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23053}
This commit is contained in:
Alex Loiko
2018-04-20 15:28:45 +02:00
committed by Commit Bot
parent d4043f69ae
commit 95141d91d8
5 changed files with 16 additions and 16 deletions
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6
modules/audio_processing/gain_controller2_unittest.cc
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@ -80,12 +80,6 @@ TEST(GainController2, Usage) {
SetAudioBufferSamples(sample_value, &ab);
AudioProcessing::Config::GainController2 config;
// Check that samples are not modified when the fixed gain is 0 dB.
config.fixed_gain_db = 0.f;
gain_controller2->ApplyConfig(config);
gain_controller2->Process(&ab);
EXPECT_EQ(ab.channels_f()[0][0], sample_value);
// Check that samples are amplified when the fixed gain is greater than 0 dB.
config.fixed_gain_db = 5.f;
gain_controller2->ApplyConfig(config);