This CL adds two new tests to perf, covering I420 and I420A input to multiplex
codec. In order to have the correct input, it adds I420A case to
SquareGenerator and corresponding PSNR and SSIM calculations.
Bug: webrtc:7671
Change-Id: I9735d725bbfba457e804e29907cee55406ae5c8d
Reviewed-on: https://webrtc-review.googlesource.com/52180
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Reviewed-by: Niklas Enbom <niklas.enbom@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Emircan Uysaler <emircan@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22330}
d90a7e8424