riggiding commented 4 years ago

Hi,

we're using the file plugin to pipe data for use in a vu-meter application. This worked well but since updating to 1.1.4.1 the data received is incomplete (tested using sine test tones and Audacity to playback / inspect the data that went through the fifo). When writing to a normal file all is fine.

Also tried using tee, same result. Any hints or ideas would be great!

The fifo is created by:

! /bin/sh

if [ ! -p "$ALSA_FIFO" ]; then

create a fifo for alsa -> vumeter

mkfifo "$ALSA_FIFO"                                           
chmod 666 "$ALSA_FIFO"

fi

cat <>"$ALSA_FIFO"

asound.conf:

pcm.hiface { type hw card 0 device 0 }

pcm.vumeter { type rate slave { pcm "alsaFifo" rate 44100 format "S16_LE" } }

pcm.alsaFifo { type file slave.pcm "null" file "/tmp/alsa-fifo" }

pcm.alsaFifoTee { type empty slave.pcm "tee:null,'/tmp/alsa-fifo',raw" }

pcm.direct { type route slave.pcm "split_direct" ttable.0.0 1 ttable.1.1 1 ttable.0.2 1 ttable.1.3 1 }

pcm.split_direct { type multi slaves.a.pcm "hiface" slaves.a.channels 2 slaves.b.pcm "vumeter" slaves.b.channels 2 bindings.0.slave a bindings.0.channel 0 bindings.1.slave a bindings.1.channel 1 bindings.2.slave b bindings.2.channel 0 bindings.3.slave b bindings.3.channel 1 }

perexg commented 4 years ago

https://github.com/alsa-project/alsa-lib/commit/6ecd330fb8a4063f814e4828f017ade20c6003e6

riggiding commented 4 years ago

Thx @perexg! Unfortunately the patch did not help :-/ Normal playback was never affected so I think there has to be a different cause

perexg commented 4 years ago

Sorry, it's probably the patch which introduced this issue (the write error code for the output file descriptor is handled differently than in the previous version). I do not have a proper fix yet.

JanM-cz commented 4 years ago

Hi @perexg any news on a fix or a possible workaround? I think we are influenced by the same problem.

adjiandov commented 4 years ago

Hi @perexg, hi all. In case someone finds a solution please share since I am affected by this problem as well.

anton87ken commented 4 years ago

Hello @perexg, we're experiencing the same problem. Any news on a this? Cheers!

mrakks commented 4 years ago

Hi, we encountered the same issue. It would be much appreciated if someone could find a solution. Best regards! @perexg

paulbalomiri commented 4 years ago

Hello @perexg,

Sorry, it's probably the patch which introduced this issue (the write error code for the output file descriptor is handled differently than in the previous version). I do not have a proper fix yet.

Do you still believe that the mentioned patch is causing this or is that idea dismissed?

riggiding commented 4 years ago

@paulbalomiri,

Do you still believe that the mentioned patch is causing this or is that idea dismissed?

I don't think so - the problem was evident before I applied the path (which I did believe to be a fix)

mbuchner commented 2 years ago

Any update on this one?

alsa-project / alsa-lib

File Plugin seems to drop data when writing to FIFO #63

! /bin/sh

create a fifo for alsa -> vumeter