Author: mav
Date: Wed Jan 25 11:45:50 2012
New Revision: 230537
URL: http://svn.freebsd.org/changeset/base/230537
Log:
Allow PASSTHROUGH (AC3) to have more then 2 channels.
8 channels can be used to get more then 6.144Mbps bandwidth.
Modified:
head/sys/dev/sound/pcm/channel.c
Modified: head/sys/dev/sound/pcm/channel.c
==============================================================================
--- head/sys/dev/sound/pcm/channel.c Wed Jan 25 11:28:18 2012
(r230536)
+++ head/sys/dev/sound/pcm/channel.c Wed Jan 25 11:45:50 2012
(r230537)
@@ -2000,9 +2000,10 @@ chn_setformat(struct pcm_channel *c, uin
int ret;
/* XXX force stereo */
- if (format & AFMT_PASSTHROUGH)
+ if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) {
format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL,
AFMT_PASSTHROUGH_EXTCHANNEL);
+ }
oldformat = c->format;
oldspeed = c->speed;
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