simple_playback blocks (no sound) on Ubuntu 18.04 / pulseaudio.

[fidergo-stephane-gourichon]

Hi.

Context

Ubuntu 18.04 (actually Xubuntu, practically the same) with regular pulseaudio server (version 1:11.1-1ubuntu7.2), no specific tweak. gcc 7.3.0 .

Compile with

gcc -W -Wall -Wextra -g simple_playback.c -lpthread -lm -ldl -o simple_playback

I started with current https://github.com/dr-soft/miniaudio/tree/master a.k.a. e184644

Expected

Sound is heard.

Observed

No sound.
No output besides Press Enter to quit.... Then I added more output.

Additional information.

I have not noticed any other sound problem on the machine : applications work, audio, video, full duplex, everything. There's only an occasional sound corruption on pulseaudio output, solved with a pulseaudio -k and autospawn, but that seems unrelated.

Debug information

For comfort I fixed unrelated warnings and re-enabled the printf in the pulseaudio code. The exact code I now use is pushed to https://github.com/fidergo-stephane-gourichon/miniaudio/tree/test_on_ubuntu1804_pulseaudio

Here's a full output:

./simple_playback /usr/share/orage/sounds/Wall_c.wav

Using device: Audio interne Stéréo analogique
DECODER: 16-bit Signed Integer / 1 / 11025
DEVICE:  16-bit Signed Integer / 2 / 44100 / PulseAudio
Press Enter to quit...TRACE: Outer loop.
TRACE: Inner loop.
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=4228, periodSizeInBytes=5280

I also tried with a 44100Hz 2 channel WAV file, with flac file, same result.

I traced with gdb.
Execution blocks inside call to pa_mainloop_iterate:

int error = ((ma_pa_mainloop_iterate_proc)pDevice->pContext->pulse.pa_mainloop_iterate)((ma_pa_mainloop*)pDevice->pulse.pMainLoop, 1, NULL);

Here's a backtrace:

(gdb) bt
#0  ma_device_write__pulse (pDevice=0x7ffffffe6480, pPCMFrames=0x7fffe40adee0, frameCount=1024) at ../miniaudio.h:14677
#1  0x00005555555983c9 in ma_worker_thread (pData=0x7ffffffe6480) at ../miniaudio.h:22471
#2  0x00007ffff7bbd6db in start_thread (arg=0x7fffe40b0700) at pthread_create.c:463
#3  0x00007ffff734488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

When stuck, I sometimes have a more complete backtrace:

#0  0x00007ffff7337cf6 in __GI_ppoll (fds=0x5555557d3ea0, nfds=3, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007ffff6ff6ec1 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so
#2  0x00007ffff6ff74d0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so
#3  0x00005555555939f0 in ma_device_write__pulse (pDevice=0x7ffffffe6480, pPCMFrames=0x7fffe40adee0, frameCount=1024) at ../miniaudio.h:14677
#4  0x00005555555983c9 in ma_worker_thread (pData=0x7ffffffe6480) at ../miniaudio.h:22471
#5  0x00007ffff7bbd6db in start_thread (arg=0x7fffe40b0700) at pthread_create.c:463
#6  0x00007ffff734488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Also, here's the end of an strace output:

[pid 16582] write(1, "Press Enter to quit...", 22Press Enter to quit...) = 22
[pid 16582] read(0,  <unfinished ...>
[pid 16583] getpid()                    = 16582
[pid 16583] getpid()                    = 16582
[pid 16583] write(5, "W", 1)            = 1
[pid 16583] mmap(NULL, 134217728, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x7fc52fa60000
[pid 16583] munmap(0x7fc52fa60000, 5898240) = 0
[pid 16583] munmap(0x7fc534000000, 61210624) = 0
[pid 16583] mprotect(0x7fc530000000, 135168, PROT_READ|PROT_WRITE) = 0
[pid 16583] write(5, "W", 1)            = 1
[pid 16583] read(4, "WW", 10)           = 2
[pid 16583] write(6, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 16583] read(4, 0x7fc53825bbde, 10) = -1 EAGAIN (Resource temporarily unavailable)
[pid 16583] ppoll([{fd=4, events=POLLIN}, {fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 3, {tv_sec=29, tv_nsec=999777000}, NULL, 8) = 1 ([{fd=8, revents=POLLIN}], left {tv_sec=29, tv_nsec=999694603})
[pid 16583] read(8, "\1\0\0\0\0\0\0\0", 8) = 8
[pid 16583] write(1, "TRACE: Outer loop.\n", 19TRACE: Outer loop.
) = 19
[pid 16583] write(1, "TRACE: Inner loop.\n", 19TRACE: Inner loop.
) = 19
[pid 16583] getpid()                    = 16582
[pid 16583] getpid()                    = 16582
[pid 16583] write(1, "TRACE: Playback: pa_mainloop_ite"..., 89TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=4932, periodSizeInBytes=5280
) = 89
[pid 16583] read(4, 0x7fc53825bc8e, 10) = -1 EAGAIN (Resource temporarily unavailable)
[pid 16583] ppoll([{fd=4, events=POLLIN}, {fd=7, events=POLLIN}, {fd=8, events=POLLIN}], 3, NULL, NULL, 8

File descriptor 4 may the a communication pipe between threads as shown below.

stat --format="%N"  /proc/16582/fd/* /proc/16583/fd/*

'/proc/16582/fd/0' -> '/dev/pts/10'
'/proc/16582/fd/1' -> '/dev/pts/10'
'/proc/16582/fd/2' -> '/dev/pts/10'
'/proc/16582/fd/3' -> '/usr/share/orage/sounds/Wall_c.wav'
'/proc/16582/fd/4' -> 'pipe:[823676]'
'/proc/16582/fd/5' -> 'pipe:[823676]'
'/proc/16582/fd/6' -> 'anon_inode:[eventfd]'
'/proc/16582/fd/7' -> 'socket:[824606]'
'/proc/16582/fd/8' -> 'anon_inode:[eventfd]'
'/proc/16583/fd/0' -> '/dev/pts/10'
'/proc/16583/fd/1' -> '/dev/pts/10'
'/proc/16583/fd/2' -> '/dev/pts/10'
'/proc/16583/fd/3' -> '/usr/share/orage/sounds/Wall_c.wav'
'/proc/16583/fd/4' -> 'pipe:[823676]'
'/proc/16583/fd/5' -> 'pipe:[823676]'
'/proc/16583/fd/6' -> 'anon_inode:[eventfd]'
'/proc/16583/fd/7' -> 'socket:[824606]'
'/proc/16583/fd/8' -> 'anon_inode:[eventfd]'

$ grep -a . /proc/16582/cmdline /proc/16583/cmdline 

/proc/16582/cmdline:./simple_playback/usr/share/orage/sounds/Wall_c.wav
/proc/16583/cmdline:./simple_playback/usr/share/orage/sounds/Wall_c.wav

Can I do something more to help you figuring out what's wrong?

Thanks.

[fidergo-stephane-gourichon]

Sample advanced_config cannot complete, outputs nothing.

Same cause inside:

#0  0x00007ffff7337cf6 in __GI_ppoll (fds=0x55555578f330, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:39
#1  0x00007ffff6ff6ec1 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so
#2  0x00007ffff6ff74d0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so
#3  0x000055555555c77e in ma_context_enumerate_devices__pulse (pContext=0x7ffffffe6130, callback=0x5555555646da <ma_context_get_devices__enum_callback>, pUserData=0x0) at ../miniaudio.h:13887
#4  0x0000555555564a04 in ma_context_get_devices (pContext=0x7ffffffe6130, ppPlaybackDeviceInfos=0x7ffffffe5ee0, pPlaybackDeviceCount=0x7ffffffe5ecc, ppCaptureDeviceInfos=0x7ffffffe5ee8, pCaptureDeviceCount=0x7ffffffe5ed0) at ../miniaudio.h:22942
#5  0x0000555555577f48 in main (argc=1, argv=0x7fffffffda48) at advanced_config.c:114
up
#1  0x00007ffff6ff6ec1 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so
(gdb) 
#2  0x00007ffff6ff74d0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so
(gdb) 
#3  0x000055555555c77e in ma_context_enumerate_devices__pulse (pContext=0x7ffffffe6130, callback=0x5555555646da <ma_context_get_devices__enum_callback>, pUserData=0x0) at ../miniaudio.h:13887
13887	        error = ((ma_pa_mainloop_iterate_proc)pContext->pulse.pa_mainloop_iterate)(pMainLoop, 1, NULL);
Breakpoint 3 at 0x55555555c760: file ../miniaudio.h, line 13887.

[mackron]

Hmm, that's annoying... I will take a look at this as soon as I can. Can you try the ALSA backend by disabling PulseAudio (Put #define MA_NO_PULSEAUDIO above the #include "miniaudio.h" line) and let me know if that works?

Thanks for reporting this!

[fidergo-stephane-gourichon]

Thank you for your feedback.

Adding #define MA_NO_PULSEAUDIO at the top of simple_playback.c and advanced_config.c (same as removing ma_backend_pulseaudio in backends) allows both samples to use ALSA backend and have expected behavior (show list of devices, play sound).

[fidergo-stephane-gourichon]

For convenience, I added a Makefile in branch https://github.com/fidergo-stephane-gourichon/miniaudio/tree/my_experiments see commit fidergo-stephane-gourichon@6c573fa

It might also be convenient for exact reproduction.

[mackron]

I've pushed a potential fix to the dev branch. Relevant commit: 72b0e7b

To test, could you add #define MA_DEBUG_OUTPUT and show the me the output. It will dump a whole bunch of lines, but I only need to see the first few. If it works I'll bump the version and organise a new release.

The advance_config example will fail due to the server name not existing, but the deadlock should be gone now.

[fidergo-stephane-gourichon]

Summary: better

I tested your current dev branch (60d6156 which contains 72b0e7b).

$ ./simple_playback /usr/share/orage/sounds/Wall_c.wav
Press Enter to quit...

Works! 👍

The advance_config example will fail due to the server name not existing, but the deadlock should be gone now.

Indeed.

$ ./advanced_config 

Playback Devices (0)

Capture Devices (0)
Failed to initialize playback device.

Other tests.

Also:

$ ./simple_enumeration 

Playback Devices
    0: Audio interne Stéréo analogique

Capture Devices
    0: Monitor of Audio interne Stéréo analogique
    1: Audio interne Stéréo analogique

And that one:

./simple_capture test_cap.wav
Press Enter to stop recording...

records relevant sound for only a very small time (about one fourth of a second).

It worked well with ALSA backend. That's probably another issue.

[fidergo-stephane-gourichon]

Detailed output

$ git branch -v

* dev                            60d6156 Another potential deadlock fix for PulseAudio.

$ gcc -W -Wall -Wextra -g -DMA_DEBUG_OUTPUT=1 simple_playback.c -lpthread -lm -ldl -o simple_playback

(usual "fall through" warnings, -W or -Wextra are enough to cause them)

$ ./simple_playback /usr/share/orage/sounds/Wall_c.wav

[miniaudio] Endian:  LE
[miniaudio] SSE2:    YES
[miniaudio] AVX2:    NO
[miniaudio] AVX512F: NO
[miniaudio] NEON:    NO
[PulseAudio] Playback attr: maxlength=5280, tlength=1760, prebuf=-1, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
[PulseAudio] Playback actual attr: maxlength=5280, tlength=5280, prebuf=3524, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
[PulseAudio]
  Audio interne Stéréo analogique (Playback)
    Format:      16-bit Signed Integer -> 16-bit Signed Integer
    Channels:    1 -> 2
    Sample Rate: 11025 -> 44100
    Buffer Size: 1320/1 (1320)
    Conversion:
      Pre Format Conversion:    YES
      Post Format Conversion:   YES
      Channel Routing:          YES
      SRC:                      YES
      Channel Routing at Start: NO
      Passthrough:              NO
Press Enter to quit...TRACE: Data available: 5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2564
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2496
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2752
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2528
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2752
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2528
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 1888
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
TRACE: Data available: 2784

[fidergo-stephane-gourichon]

Anyway, now it works.

writableSizeInBytes=0 always, as seen here:

TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280

 ./simple_playback /usr/share/orage/sounds/Wall_c.wav 2>&1 | sort | uniq -c


      1       Channel Routing at Start: NO
      1       Channel Routing:          YES
      1       Passthrough:              NO
      1       Post Format Conversion:   YES
      1       Pre Format Conversion:    YES
      1       SRC:                      YES
      1     Buffer Size: 1320/1 (1320)
      1     Channels:    1 -> 2
      1     Conversion:
      1     Format:      16-bit Signed Integer -> 16-bit Signed Integer
      1     Sample Rate: 11025 -> 44100
      1   Audio interne Stéréo analogique (Playback)
      1 Press Enter to quit...TRACE: Data available: 5280
     24 TRACE: Data available: 1760
      1 TRACE: Data available: 1788
     15 TRACE: Data available: 1792
      2 TRACE: Data available: 1820
     21 TRACE: Data available: 1824
      1 TRACE: Data available: 1828
     18 TRACE: Data available: 1856
     30 TRACE: Data available: 1888
     18 TRACE: Data available: 1920
      2 TRACE: Data available: 1924
      1 TRACE: Data available: 1948
      9 TRACE: Data available: 1952
      6 TRACE: Data available: 1984
      4 TRACE: Data available: 2016
      2 TRACE: Data available: 2048
      1 TRACE: Data available: 2052
      1 TRACE: Data available: 2076
      2 TRACE: Data available: 2080
      8 TRACE: Data available: 2112
      1 TRACE: Data available: 2116
      1 TRACE: Data available: 2172
      1 TRACE: Data available: 2176
      1 TRACE: Data available: 2180
      1 TRACE: Data available: 2204
      1 TRACE: Data available: 2208
      1 TRACE: Data available: 2212
      1 TRACE: Data available: 2236
      1 TRACE: Data available: 2244
      1 TRACE: Data available: 2272
      1 TRACE: Data available: 2304
      1 TRACE: Data available: 2340
      2 TRACE: Data available: 2368
      5 TRACE: Data available: 2400
      1 TRACE: Data available: 2432
     14 TRACE: Data available: 2464
      2 TRACE: Data available: 2492
    109 TRACE: Data available: 2496
    125 TRACE: Data available: 2528
     24 TRACE: Data available: 2560
      1 TRACE: Data available: 2564
     19 TRACE: Data available: 2592
      1 TRACE: Data available: 2620
      8 TRACE: Data available: 2624
      3 TRACE: Data available: 2628
      2 TRACE: Data available: 2652
      5 TRACE: Data available: 2656
     13 TRACE: Data available: 2688
     27 TRACE: Data available: 2720
    137 TRACE: Data available: 2752
    115 TRACE: Data available: 2784
      1 TRACE: Data available: 2788
     14 TRACE: Data available: 2816
      1 TRACE: Data available: 2848
      5 TRACE: Data available: 2880
      2 TRACE: Data available: 2912
      1 TRACE: Data available: 2976
   1999 TRACE: Playback: pa_mainloop_iterate(). writableSizeInBytes=0, periodSizeInBytes=5280
      1 [PulseAudio]
      1 [PulseAudio] Playback actual attr: maxlength=5280, tlength=5280, prebuf=3524, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
      1 [PulseAudio] Playback attr: maxlength=5280, tlength=1760, prebuf=-1, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
      1 [miniaudio] AVX2:    NO
      1 [miniaudio] AVX512F: NO
      1 [miniaudio] Endian:  LE
      1 [miniaudio] NEON:    NO
      1 [miniaudio] SSE2:    YES

[mackron]

Potential fix for the capture issue is in the dev branch.

[fidergo-stephane-gourichon]

Tested 015c116, which includes b725388, same behavior, no improvement.

[mackron]

Hmm, that's annoying. I've pushed another update with some debug output. Could you post the output of that?

One thing I've noticed (which I don't know how to fix just yet) is that it will deadlock when you try capturing without an actual microphone active. So for example, on my machine PulseAudio will have a generic input device even when no microphone is plugged in. In this case it deadlocks. When I plug in my actual microphone and use that as the capture device it will work like normal.

I will take a further look at this later to work around those deadlocks (I'm also getting a deadlock with ALSA in my no-microphone-plugged-in scenario above by the way).

[fidergo-stephane-gourichon]

Summary: fixed in dea8309, correct behavior observed.

Just tested current dev, now it records sound correctly as long as needed.

Recorded sound files play correctly with simple_playback as well as with e.g. mplayer.

git branch -v

* dev                            dea8309 PulseAudio: Experimental fix for a deadlock with PulseAudio.



./simple_capture test_cap2.wav

[miniaudio] Endian:  LE
[miniaudio] SSE2:    YES
[miniaudio] AVX2:    NO
[miniaudio] AVX512F: NO
[miniaudio] NEON:    NO
[PulseAudio] Capture attr: maxlength=5280, tlength=1760, prebuf=-1, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
[PulseAudio] Capture actual attr: maxlength=5280, tlength=1760, prebuf=-1, minreq=1760, fragsize=1760; internalBufferSizeInFrames=1320
[PulseAudio]
  Audio interne Stéréo analogique (Capture)
    Format:      32-bit IEEE Floating Point -> 16-bit Signed Integer
    Channels:    2 -> 2
    Sample Rate: 44100 -> 44100
    Buffer Size: 1320/3 (440)
    Conversion:
      Pre Format Conversion:    NO
      Post Format Conversion:   YES
      Channel Routing:          NO
      SRC:                      NO
      Channel Routing at Start: NO
      Passthrough:              NO
Press Enter to stop recording...
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=3616.
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=1856.
TRACE: Data available: bytesMapped=96, readableSizeInBytes=96.
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=3456.
TRACE: Data available: bytesMapped=1696, readableSizeInBytes=1696.
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=3488.
TRACE: Data available: bytesMapped=1728, readableSizeInBytes=1728.
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=3616.
TRACE: Data available: bytesMapped=1760, readableSizeInBytes=1856.
TRACE: Data available: bytesMapped=96, readableSizeInBytes=96.
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0
TRACE: Capture: pa_mainloop_iterate(). readableSizeInBytes=0

[mackron]

Thanks for testing that. I will organize a release with these fixes soon.

[mackron]

I've gone ahead and pushed these fixes to the master branch and bumped the version. Just as a side note, this particular part of the PulseAudio backend (among others) will be refactored soon so fingers crossed I don't accidentally reintroduce these bugs...

Thanks for reporting these issues!