tree 7e243aac882eb229f7ac444ed279b42600c9dbc6
parent 0ad65f40d495fe2d1ba7be8f4cbc396e82db2eb5
author susannad <susannad@google.com> 1603135760 +0000
committer Susanna D'Souza <susannad@google.com> 1603294178 +0000

Create current_unit_stack variable.

This variable points to the most recent list of units with merged
coefficients and is passed through several functions to the functions
that check filter RD-values.

There is also a minor change to thread_common.c to properly disable
multithreading.

Change-Id: Iacbb6338f44ecf05e4c6b7bbfe53eddc2f41cd4d