Hi,
I've just upgraded to Kubuntu 15.10 and applied patches for libsoxr
resampler to PA 6.0 that comes with the distro. I'm seeing crashes in
the LFE filter if I use soxr-vhq resampler (I haven't tried the other
soxr* variants yet). Is this a known problem? Below is the backtrace of
one of the crashes.
Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7f92bf7fc700 (LWP 2769)]
0x00007f92d2263267 in __GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:55
55 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 0x00007f92d2263267 in __GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:55
#1 0x00007f92d2264eca in __GI_abort () at abort.c:89
#2 0x00007f92d37e8b8b in pa_xmalloc () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-6.0.so
#3 0x00007f92d37e8d79 in pa_xmemdup () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-6.0.so
#4 0x00007f92d3a60c65 in pa_lfe_filter_process (f=0x1ed1d60,
buf=buf@entry=0x203ca50) at pulsecore/filter/lfe-filter.c:132
#5 0x00007f92d3a7e923 in pa_resampler_run (r=0x203c8d0,
in=0x7f92bf7f9490, out=0x7f92bf7f94b0) at pulsecore/resampler.c:1384
#6 0x00007f92d3a896e3 in pa_sink_input_peek (i=i@entry=0x1ebe8d0,
slength=22008, chunk=chunk@entry=0x7f92bf7f96d0,
volume=volume@entry=0x7f92bf7f96e8) at pulsecore/sink-input.c:965
#7 0x00007f92d3a91fa0 in fill_mix_info (s=s@entry=0x1e36350,
length=length@entry=0x7f92bf7f9618, info=info@entry=0x7f92bf7f96d0,
maxinfo=32) at pulsecore/sink.c:1016
#8 0x00007f92d3a94d5d in pa_sink_render_into (s=s@entry=0x1e36350,
target=target@entry=0x7f92bf7fbd20) at pulsecore/sink.c:1256
#9 0x00007f92d3a952ff in pa_sink_render_into_full (s=0x1e36350,
target=target@entry=0x7f92bf7fbde0) at pulsecore/sink.c:1340
#10 0x00007f92cccf71ba in mmap_write (on_timeout=false, polled=false,
sleep_usec=<synthetic pointer>, u=0x1fc6f60) at modules/alsa/alsa-sink.c:645
#11 thread_func (userdata=0x1fc6f60) at modules/alsa/alsa-sink.c:1716
#12 0x00007f92d38228b8 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-6.0.so
#13 0x00007f92d2d136aa in start_thread (arg=0x7f92bf7fc700) at
pthread_create.c:333
#14 0x00007f92d2334eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
The crashes stop happening if I disable the filter in daemon.conf with
"enable-lfe-remixing = no".
I realise 6.0+soxr is not an official configuration, but the patches are
a rather straightforward backport of the code that is in master, so I
suspect the same problem will be present in 7.x. If needed, I can
provide the actual patch I'm using.
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