[ Thanks to An Anonymous
Reader for this link. ]
“For the decoder, Koleszar highlights the work of Jeff
Muizelaar, Johan Koenig, and Tim Terriberry. While he doesn’t
specifically ask for help on any one item as he did with the
encoder, he does highlight some of the ongoing work. Terriberry is
working had on the bool decoder, which is called multiple times per
each bit in the input stream. Currently, the code uses a simple
clamp on the innermost loops for checking and performs less
frequent copies into a circular buffer. Terriberry’s patch uses a
more complex clamp and removes the circular buffer.“Meanwhile Muizelaar’s work has combined IDCT and summation with
the predicted block into a single function. Doing this reduces
memory transfers and therefore reduces cache pollution. Koenig is
implementing Muizellaar’s work into ARM processors.”