Hi,
I finally got around to working out the kinks to pass-through
high-definition audio
in Xbmc. Funny how long it took me to get back to it. I was re-reading
some
emails on the list from way back in March and one of the emails turned
me on to
a proper solution. One thing that I wasn't able to do was to get PulseAudio
to pass-through 8 channel audio when the device's sink was set as
hdmi-stereo.
So I patched PulseAudio 1.1 for hdmi-surround-71 and lo and behold it
worked.
Here's a patch, hopefully we can get this added in the next official release
of PulseAudio. I know that there are quite a few Xbmc users that have
been anxiously
waiting for high-definition audio pass-through to work correctly. Of
course if someone
has a better solution, that would be fine too.
--- ./src/modules/alsa/mixer/profile-sets/default.conf.orig
2011-10-20 06:54:16.000000000 -0600
+++ ./src/modules/alsa/mixer/profile-sets/default.conf 2011-11-17
02:16:00.038900536 -0700
@@ -173,6 +173,12 @@ channel-map = left,right
priority = 4
direction = output
+[Mapping hdmi-surround-71]
+device-strings = hdmi:%f
+channel-map =
front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right
+priority = 5
+direction = output
+
; An example for defining multiple-sink profiles
#[Profile output:analog-stereo+output:iec958-stereo+input:analog-stereo]
#description = Foobar
--- ./src/modules/alsa/alsa-mixer.c.orig 2011-10-20
06:54:16.000000000 -0600
+++ ./src/modules/alsa/alsa-mixer.c 2011-11-17 02:15:38.168035216 -0700
@@ -3700,7 +3700,8 @@ static int mapping_verify(pa_alsa_mappin
{ "iec958-passthrough", N_("Digital Passthrough (IEC958)") },
{ "iec958-ac3-surround-40", N_("Digital Surround 4.0
(IEC958/AC3)") },
{ "iec958-ac3-surround-51", N_("Digital Surround 5.1
(IEC958/AC3)") },
- { "hdmi-stereo", N_("Digital Stereo (HDMI)") }
+ { "hdmi-stereo", N_("Digital Stereo (HDMI)") },
+ { "hdmi-surround-71", N_("Digital Surround 7.1 (HDMI)") }
};
pa_assert(m);
