Don't always downsample to 16kHz in the reverse stream in APM

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The first approach landed here: https://codereview.webrtc.org/1773173002
But it was partially reverted, because it affected the AEC performance, here: https://codereview.webrtc.org/1867483003/
The main difference of this approach is that it doesn't use the 3-band splitting filter in the reverse stream, which seems to be the culprit of the AEC regression.
Also, the 2-band splitting filter has been used for the 32kHz case for a long time without any problem, and this is expanded in the CL to cover the 48kHz case as well.

BUG=webrtc:5725
TBR=tina.legrand@webrtc.org

Review URL: https://codereview.webrtc.org/1865633005

Cr-Commit-Position: refs/heads/master@{#12451}

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aluebs

2016-04-20 15:27:58 -07:00

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parent 0a2c054f42

commit eb3603bd5e

5 changed files with 20 additions and 13 deletions

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