[pulseaudio-tickets] [Bug 90125] [native protocol] sending to 5.1 configuration doesn't work

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90125

--- Comment #7 from rh <r at hirner.at> ---
Thanks for your instructions. My new findings (both
pulseaudio-6.0-2.fc22.x86_64):

1) WITH DEFAULT-SERVER

When using
default-server = <name-of-pc.lan>
instead of zeroconf-publish/discover on PC B, 5.1 sound transmission to PC A
works perfectly.
There are no suspicious log messages, neither on PC A nor on PC B.

However, when using this configuration, I can't switch to the local headphones
on PC-B in Gnome audio settings because the local sound card is not used by
pulseaudio.


2) WHEN ADDING THE SINK MANUALLY WITH PARAMETERS AS TOLD BY zeroconf-discover

When following your instructions, zeroconf-discover reports this sink (+
another HDMI sink which I won't use):

server=[<ip of PC A>]:4713 sink=alsa_output.pci-0000_00_1b.0.analog-surround-51
format=s16le channels=6 rate=44100
sink_name=tunnel.PC-A.local.alsa_output.pci-0000_00_1b.0.analog-surround-51
channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe

When adding this on PC B with "pactl load-module module-tunnel-sink", pactl
prints "24". I don't even have to play something: immediately after adding the
sink on PC B, PC A prints these lines to the logs:

---------------------------
Jun 10 21:23:38 PC-A.lan pulseaudio[3268]: [pulseaudio] protocol-native.c:
Client sent non-aligned memblock: index 0, length 18824, frame size: 12
Jun 10 21:23:38 PC-A.lan pulseaudio[3268]: [pulseaudio] protocol-native.c:
Client sent non-aligned memblock: index 18824, length 17376, frame size: 12
---------------------------

The memblock indexes and the count of these lines vary when I try several
times.

Now the strange thing: When using "module-tunnel-sink-new", the same lines
appear and it doesn't work, either.


3) WITHOUT ADDING A SINK MANUALLY, BUT USING paplay

Now the even more strange thing: When using "paplay -v -s PC-A.lan
some-stereo-sample.wav", all works:

---------------------------
Opening a playback stream with sample specification 's16le 2ch 44100Hz' and
channel map 'front-left,front-right'.
Connection established.
Stream successfully created.
Buffer metrics: maxlength=4194304, tlength=352800, prebuf=349276, minreq=3528
Using sample spec 's16le 2ch 44100Hz', channel map 'front-left,front-right'.
Connected to device alsa_output.pci-0000_00_1b.0.analog-surround-51 (index: 1,
suspended: no).
Stream started.
Stream underrun.
Playback stream drained.: 382721 usec.        
Draining connection to server.
---------------------------

When playing a 5.1 sample WAV file, it does NOT work:

---------------------------
LANG=en paplay -s pc-a.lan -v 6_Channel_ID.wav 
Opening a playback stream with sample specification 's16le 6ch 44100Hz' and
channel map 'front-left,front-right,front-center,lfe,rear-left,rear-right'.
Connection established.
Stream successfully created.
Buffer metrics: maxlength=4194312, tlength=1058400, prebuf=1047828,
minreq=10584
Using sample spec 's16le 6ch 44100Hz', channel map
'front-left,front-right,front-center,lfe,rear-left,rear-right'.
Connected to device alsa_output.pci-0000_00_1b.0.analog-surround-51 (index: 1,
suspended: no).
<<gets stucked here until I hit Ctrl+C>>
^CGot signal, exiting.cy: 666643 usec.      
---------------------------
(on PC A, the non-aligned memblocks are printed)

So I guess this must be somehow related to how 5.1 sound is transmitted.

Does this make any sense to you? Can I do more debugging, maybe with paplay?

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