[haiku-bugs] [Haiku] #9134: Adjustable stream parameters for HDA driver
- From: "Pete" <trac@xxxxxxxxxxxx>
- Date: Sun, 11 Nov 2012 03:29:37 -0000
#9134: Adjustable stream parameters for HDA driver
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Reporter: Pete | Owner: nobody
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: Audio & Video | Version: R1/alpha3
Keywords: HDA audio driver | Blocked By:
Blocking: | Has a Patch: 0
Platform: All |
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The current (fixed) default buffer size in the HDA driver is unsuitable
for real-time use, as it results in a latency of 1/10 sec or so. The
attached patch makes it possible for the user to supply a settings file
(in /boot/home/config/settings/kernel/drivers) that can optionally set
buffer size, buffer count and sample rate.
Parameters supplied in the file override the defaults (and the sample
rates in the Media Preferences), but any not supplied remain at their
defaults.
I find that if I leave the sample rate at the default 192000 fps, but
request 4 buffers of 1024 frames, I get a nice 13-14ms latency.
I'm also attaching a sample hda.settings file (as it didn't get into the
patch...)
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Ticket URL: <http://dev.haiku-os.org/ticket/9134>
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