commit 38c15d3995e7d1c1270fee741f8c6534fccccf88
author Alex Loiko <aleloi@webrtc.org> Fri Mar 02 12:53:09 2018
committer Commit Bot <commit-bot@chromium.org> Fri Mar 02 14:00:39 2018
tree 769f4c93ff5b5f7b074404ded351569f9306fe63
parent 3e871ea0474adc012cedf976626543c32b49ff49

Template argument and corpora for Audio Processing Fuzzer.

We found out that

  int16_t x = test::FuzzDataHelper::ReadOrDefaultValue(0)

reads 4 bytes from the fuzzer input instead of 2. That means that
almost half the bits in the input data to audio_processing_fuzzer are
ignored. This change adds template arguments to force reading 2 bytes
when we only need 2.

We also add a small manually generated corpus. During local testing we
let the fuzzer run for a few hours on an empty corpus. Adding the
manually-generated files resulted in an immediate coverage increase by
~3%, and then by another 3% over the next few hours.

The manually generated corpus contains a short segment of speech with
real echo. We suspect that triggering Voice Activity Detection or echo
estimation filter convergence can be difficult for an automatic
fuzzer.

We remove the Level Controller config. We read 20 bytes extra after the
config to guard against future configuration changes.

Bug: webrtc:7820
Change-Id: If60c04f53b27c519c349a40bd13664eef7999368
Reviewed-on: https://webrtc-review.googlesource.com/58744
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22269}