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APM: Make the GetStatistics call independent of the locks in APM

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This CL changes the GetStatistics call in the audio processing module
(APM) to not aquire the render or capture locks in APM, while still
being thread-safe.
This change eliminates the risk of thread-priority inversion due to the
GetStatistics call.

Apart from the above the CL:
-Corrects the GetStatistics to not be const (it was const even though it
 aquired locks).
-Slightly changes the statistics reporting, so that the stats received
may be older than the most recent stats reported.

Bug: webrtc:11241
Change-Id: I00deb5507e004cbe6e4a19a8bad357491f86f4ab
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/163982
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30131}
This commit is contained in:
Per Åhgren
2019-12-30 14:32:14 +01:00
committed by Commit Bot
parent a43777dead
commit cf4c872dbd
7 changed files with 90 additions and 67 deletions
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3
modules/audio_processing/include/mock_audio_processing.h
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@ -129,7 +129,8 @@ class MockAudioProcessing : public ::testing::NiceMock<AudioProcessing> {
MOCK_METHOD0(DetachPlayoutAudioGenerator, void());
MOCK_METHOD0(UpdateHistogramsOnCallEnd, void());
MOCK_CONST_METHOD1(GetStatistics, AudioProcessingStats(bool));
MOCK_METHOD0(GetStatistics, AudioProcessingStats());
MOCK_METHOD1(GetStatistics, AudioProcessingStats(bool));
MOCK_CONST_METHOD0(GetConfig, AudioProcessing::Config());
};