[mythtv-commits] mythtv/master commit: 412ceac04 by Mark Kendall (mark-kendall)

[MythTV]

      Author:  Mark Kendall <mkendall at mythtv.org>
 Change Date:  2011-06-05T20:34:34-07:00
   Push Date:  2011/06/05 20:34:53 -0700
  Repository:  mythtv
      Branch:  master
New Revision:  412ceac04d12ae5d65bd0fb3b0ad2afa50c59b78
   Changeset:  https://github.com/MythTV/mythtv/commit/412ceac04

Log:

RingBuffer: Tweak the fill_threshold settings again.

- raise fill_threshold to 7/8th of the buffer size, which gives up to
4Mb of additional filled buffer.
- drop wait timeout for filling the additional buffer space above the
threshold from 1000ms to 50ms.

On bursty matroska streams, there may be no buffer activity at all for
10s of seconds. During this time the read ahead loop would only trigger
an additional read above the fill threshold every second and under the
worst case scenario, this meant that the buffer was not sufficiently
full before the next burst of read activity.

(N.B. I inadvertantly committed a change to the fill threshold in
bff85941ca)

Modified:

   mythtv/libs/libmythtv/ringbuffer.cpp