'Twas brillig, and Antoine Martin at 28/09/09 07:53 did gyre and gimble: > Hi, > > I am trying to get some apps to talk to a seconday pa server, and > redirect the output of that server to another (ie: the regular pa server > on my machine) using pactl when desired, and fallback to null-sink when > not present. > > I start the new server with: > pulseaudio -n --start -vvvv --daemonize=false --system=false > --use-pid-file=false --exit-idle-time=-1 --load=module-null-sink > --load=module-rescue-streams "--load=module-native-protocol-unix > socket=/tmp/testpulse" > So far, so good. I can play files - they just get sent to /dev/null > > Now, when I try to tell this new server to add a new sink which points > to my existing pa server (which I also tested, and also works fine on > its own), I use: > pactl -s /tmp/testpulse load-module module-tunnel-sink > server=unix:/tmp/pulse-sJWIUwdZZeny/native sink_name=pulse_main > > Unfortunately, the new pa server seems to get into a spin: > > I: sink.c: Created sink 1 "pulse_main" with sample spec s16le 2ch > 44100Hz and channel map front-left,front-right > I: source.c: Created source 1 "pulse_main.monitor" with sample spec > s16le 2ch 44100Hz and channel map front-left,front-right > D: module-tunnel.c: Thread starting up > D: rtpoll.c: Acquired POSIX realtime signal SIGRTMIN+28 > I: module.c: Loaded "module-tunnel-sink" (index: #3; argument: > "server=unix:/tmp/pulse-sJWIUwdZZeny/native sink_name=pulse_main"). > D: module-tunnel.c: Connection established, authenticating ... > D: module-tunnel.c: Protocol version: remote 14, local 14 > D: module-tunnel.c: Connection authenticated, creating stream ... > I: client.c: Freed 0 "pactl" > I: protocol-native.c: Connection died. > D: module-tunnel.c: Stream created. > D: module-tunnel.c: Server reports playback started. > I: module-tunnel.c: Server signalled buffer overrun/underrun. > D: module-tunnel.c: Server reports playback started. > I: module-tunnel.c: Server signalled buffer overrun/underrun. > > [repeated hundreds of times] > > D: module-tunnel.c: Server reports playback started. > I: module-tunnel.c: Server signalled buffer overrun/underrun. > W: module-tunnel.c: Stream died. > I: module.c: Unloading "module-tunnel-sink" (index: #3). > D: module-rescue-streams.c: No sink inputs to move away. > D: module-rescue-streams.c: No source outputs to move away. > D: module-tunnel.c: Thread shutting down > I: sink.c: Freeing sink 1 "pulse_main" > I: source.c: Freeing source 1 "pulse_main.monitor" > I: module.c: Unloaded "module-tunnel-sink" (index: #3). > > Am I missing something obvious? > I thought the module-tunnels-sink should be straightforward to enable, > ultimately I want to use it through a vpn/tunnel, but if I can't get it > to work with plain unix sockets... there's not point in even trying that > is there? Odd. I've never tried this setup but I can't see why this would cause problems. You may have to dig through the code and work out why the under/over runs are being signalled. In an ideal world module-tunnel-* would work in a glitch free way (e.g. dynamic buffer adjustment to compensate for when underruns occur etc. which would help smooth out any network issues too and as a side effect, probably solve this problem. You maybe want to narrow down as to whether it is an under or an overrun that is occurring if you can. So I don't have a magic bullet, but for the record, rather than loading module-null-sink, you probably want to load module-always-sink. This module is specifically designed to keep a null sink loaded whenever a real sink (e.g. a tunnel or another null sink) is not present. This means that you'll probably get the automatic switching between the real and a dummy device that you want. Of course that's all irrelevant if the actual tunnel is playing up! Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mandriva Linux Contributor [http://www.mandriva.com/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]
