commit 3ae24657887ed0a9f2e547973640890e9dfa6ea4
author Attila Nagy <attilanagy@google.com> Fri Feb 25 13:42:05 2011 +0200
committer Attila Nagy <attilanagy@google.com> Fri Mar 11 10:52:51 2011 +0200
tree ae112cccd2353c21568843b01c9527ae009d634a
parent cfaee9f7c663150d4bc478bb47e3eb4038076ca5

Encoder loopfilter running in its own thread

In multithreaded mode the loopfilter is running in its own thread (filter level
calculation and frame filtering). Filtering is mostly done in parallel with the
bitstream packing. Before starting the packing the loopfilter level has
to be calculated. Also any needed reference frame copying is done in the
filter thread.

Currently the encoder will create n+1 threads, where n > 1 is the number of
threads specified by application  and 1 is the extra filter thread. With n = 1
the encoder runs in single thread mode. There will never be more than n threads
running concurrently.

Change-Id: I4fb29b559a40275d6d3babb8727245c40fba931b