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| author | David Vossel <dvossel@digium.com> | 2010-08-12 20:17:17 +0000 |
|---|---|---|
| committer | David Vossel <dvossel@digium.com> | 2010-08-12 20:17:17 +0000 |
| commit | bbb32fe33eb9a0acc1fdacada7cf7f8eafe072f2 (patch) | |
| tree | 30f1421ea8c3e45cb1063acd31e9d4d0af63f05d /CHANGES | |
| parent | 2c75d020665a5398ce155eb7feb0130e6def4cfd (diff) | |
Merged revisions 282047 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.8
........
r282047 | dvossel | 2010-08-12 15:15:41 -0500 (Thu, 12 Aug 2010) | 35 lines
improved translation paths for wideband codecs
The problem I'm addressing is that Asterisk's current
method of building the least cost translation paths
between codecs does not take into account sample rate.
For instance, it was possible for siren14 (a 32khz codec),
to contain the a translation path to siren7 (a 16khz
audio codec) that goes through slin at 8khz. In this
case Asterisk takes a 32khz codec, down samples it to
8khz and then up samples it to 16khz which is terrible
regardless if it is computationally less expensive. This
patch now builds translation paths that give priority to
maintaining the best possible sample rate before taking
into consideration computational cost. This patch also
adds cli commands to expose what translation paths are
actually being used.
Changes:
1. Translation paths will never contain a step that changes
the sample rate unless absolutely necessary.
2. When choosing the best codec to make two channels compatible.
Shared codecs with the highest sample rate are given priority.
3. A new cli command to show all translation paths available
for a specific codec 'core show translation paths [codec name]'
has been added.
4. 'core show translation' which displays the translation
matrix now includes the new higher bit audio codecs in the table.
5. 'core show channel [channel name]' now displays the
translation paths if translation is used.
(closes issue #16841)
Reported by: dvossel
Review: https://reviewboard.asterisk.org/r/842/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@282048 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'CHANGES')
| -rw-r--r-- | CHANGES | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -543,6 +543,8 @@ Miscellaneous * The UNISTIM channel driver (chan_unistim) has been updated to support devices that have less than 3 lines on the LCD. * Realtime now supports database failover. See the sample extconfig.conf for details. + * The addition of improved translation path building for wideband codecs. Sample + rate changes during translation are now avoided unless absolutely necessary. CLI Changes ----------- |