Alessio Bazzica 05f5d636e5 RNN VAD: pitch search optimizations (part 4)
Add inverted lags index to simplify the loop in
`FindBestPitchPeriod48kHz()`. Instead of looping over 294 items,
only loop over the relevant ones (up to 10) by keeping track of
the relevant indexes.

The benchmark has shown a slight improvement (about +6x).

Benchmarked as follows:
```
out/release/modules_unittests \
  --gtest_filter=*RnnVadTest.DISABLED_RnnVadPerformance* \
  --gtest_also_run_disabled_tests --logs
```

Results:

      | baseline             | this CL
------+----------------------+------------------------
run 1 | 22.8319 +/- 1.46554  | 22.1951 +/- 0.747611
      | 389.367x             | 400.539x
------+----------------------+------------------------
run 2 | 22.4286 +/- 0.726449 | 22.2718 +/- 0.963738
      | 396.369x             | 399.16x
------+----------------------+------------------------
run 2 | 22.5688 +/- 0.831341 | 22.4166 +/- 0.953362
      | 393.906x             | 396.581x

This CL also moved `PitchPseudoInterpolationInvLagAutoCorr()`
into `FindBestPitchPeriod48kHz()`.

Bug: webrtc:10480
Change-Id: Id4e6d755045c3198a80fa94a0a7463577d909b7e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/191764
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32590}
2020-11-11 15:51:52 +00:00
2018-10-05 14:40:21 +00:00
2020-11-02 13:46:16 +00:00
2020-11-05 15:55:33 +00:00
2019-10-28 12:27:50 +00:00
2020-09-09 14:36:03 +00:00
2020-10-23 15:14:22 +00:00
2020-03-30 12:15:56 +00:00
2020-07-13 11:42:07 +00:00
2020-10-22 19:13:15 +00:00

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