tree f1add7c7ee200dbdfe3b8f4481f9e11b28c2d178
parent 2c52868e3c66852c5b692871fc4c1cb70a376eca
author Marco Paniconi <marpan@google.com> 1611558954 -0800
committer Marco Paniconi <marpan@google.com> 1611611866 +0000

rtc-svc: Set the multi-threading per spatial layer

Add the (#threads, #tile_columns/rows) to the layer context
for spatial layers. This allows for setting the multi-threading
per spatial layer. For now, since the mt is not working well for
real-time (especially for low resolns), we force lower spatial layers
to always use 1 thread, and top layer to use the mt input by user.

Future CL will add codec control to allow user to set the mt per
spatial layer, when the mt performance is improved.

Forcing lower resolutions to use 1 thread removes regression in
the current codebase if user/application enables mt for svc.

Change-Id: I22c5638dd6a92e5db6224078254d07bc15ac3e4e