Commit Graph

11 Commits

Author SHA1 Message Date
Warner Losh
098ca2bda9 Start each of the license/copyright comments with /*-, minor shuffle of lines 2005-01-06 01:43:34 +00:00
Orion Hodson
6635978f23 Additional malloc failure checks. 2003-04-20 17:08:56 +00:00
Orion Hodson
a7576e2e4b Back out last commit, which is fine in theory, but ignores the fact
that a lock is held whilst the allocations are made (M_WAITOK -> M_NOWAIT).
2003-03-05 14:48:28 +00:00
Brian Feldman
3fbe138ca9 It seems that sound(4)'s feeder routines don't need to allocate memory
without waiting, since they are called from a system-call context only.
This appears to fix all sorts of problems with open("/dev/dsp", O_WRONLY)
randomly returning ENXIO.

Found by:	cognet
2003-02-23 20:49:45 +00:00
Orion Hodson
63679b6573 Fix comment typo.
Sync with userland test framework which now deals better with pcm feeder kobj
emulation.

Reduce max rate from 96kHz to 48kHz as userland tests found a few bad
points about 90kHz and we don't care about operating up there for now.
2003-02-06 17:32:02 +00:00
Orion Hodson
456922d5f2 o Constrain inputs to 25Hz granularity so interpolator can operate
between any pair of values in range 4-96kHz.  Thanks to Ken Marks for
discovering there were problems with the previous version.

o Use a non-recursive gcd routine.
2003-01-30 16:32:56 +00:00
Orion Hodson
4a532ff091 Re-implemention of the interpolation code used for sample rate
conversion.  The new version has improved interpolation accuracy and
maintains the timing relationship between the input and output signals
exactly.

Approved by:	cg
2003-01-20 00:54:24 +00:00
Cameron Grant
67beb5a5c8 various fixes to eliminate locking warnings
Approved by:	re
Reviewed by:	orion
2002-11-25 17:17:43 +00:00
Cameron Grant
67b1dce3bc many changes:
* add new channels to the end of the list so channels used in order of
addition

* de-globalise definition of struct snddev_info and provide accessor
functions where necessary.

* move the $FreeBSD$ tag in each .c file into a macro and allow the
/dev/sndstat handler to display these when set to maximum verbosity to aid
debugging.

* allow each device to register its own sndstat handler to reduce the amount
of groping sndstat must do in foreign structs.
2001-08-23 11:30:52 +00:00
Cameron Grant
4dce85407c add a new method for retrieving feeder parameters 2001-05-27 14:49:14 +00:00
Cameron Grant
60391e107d add a software sample rate conversion feeder. this uses linear
interpolation for reasonable quality whilst not using too much cpu time.
2001-04-08 20:26:22 +00:00