svn commit: r193683 - head/sys/conf

[Ariff Abdullah]

Author: ariff
Date: Mon Jun  8 04:39:47 2009
New Revision: 193683
URL: http://svn.freebsd.org/changeset/base/193683

Log:
  Add notes on various SND_* options.

Modified:
  head/sys/conf/NOTES

Modified: head/sys/conf/NOTES
==============================================================================
--- head/sys/conf/NOTES	Mon Jun  8 04:34:51 2009	(r193682)
+++ head/sys/conf/NOTES	Mon Jun  8 04:39:47 2009	(r193683)
@@ -2110,6 +2110,42 @@ hint.gusc.0.drq="1"
 hint.gusc.0.flags="0x13"
 
 #
+# Following options are intended for debugging/testing purposes:
+#
+# SND_DEBUG                    Enable extra debugging code that includes
+#                              sanity checking and possible increase of
+#                              verbosity.
+#
+# SND_DIAGNOSTIC               Simmilar in a spirit of INVARIANTS/DIAGNOSTIC,
+#                              zero tolerance against inconsistencies.
+#
+# SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
+#                              in. This options enable most feeder converters
+#                              except for 8bit. WARNING: May bloat the kernel.
+#
+# SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
+#
+# SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
+#                              as much as possible (the default trying to
+#                              avoid it). Possible slowdown.
+#
+# SND_PCM_64                   (Only applicable for i386/32bit arch)
+#                              Process 32bit samples through 64bit
+#                              integer/arithmetic. Slight increase of dynamic
+#                              range at a cost of possible slowdown.
+#
+# SND_OLDSTEREO                Only 2 channels are allowed, effectively
+#                              disabling multichannel processing.
+#
+options		SND_DEBUG
+options		SND_DIAGNOSTIC
+options		SND_FEEDER_MULTIFORMAT
+options		SND_FEEDER_FULL_MULTIFORMAT
+options		SND_FEEDER_RATE_HP
+options		SND_PCM_64
+options		SND_OLDSTEREO
+
+#
 # IEEE-488 hardware:
 # pcii:		PCIIA cards (uPD7210 based isa cards)
 # tnt4882:	National Instruments PCI-GPIB card.