hang in mci tests?

[Dan Kegel]

Hi Joerg,
I had a new hang on yesterday's git under valgrind:

../../../tools/runtest -q -P wine -M winmm.dll -T ../../.. -p
winmm_test.exe.so mci.c && touch mci.ok
preloader: Warning: failed to reserve range 00110000-68000000
mci.c:186: Test failed: mci close all notify (without buffer) returned
error: 281
mci.c:190: Test failed: mci close all notify (with output buffer)
returned error: 281
mci.c:199: Test failed: mci sysinfo waveaudio quantity open, expected
output buffer '0', got: '1'
mci.c:279: Test failed: mci status position gave 2333, expected 2000,
some tests will fail
mci.c:288: Test failed: recorded 74662 bytes, expected 64000
mci.c:298: Test failed: recorded 37331 samples, expected 32000
mci.c:330: Test failed: mci status length gave 2333, expected 2000,
some tests will fail.
mci.c:333: Test failed: mci incorrect cue output returned:
MCIERR_EXTENSION_NOT_FOUND
mci.c:148: Test failed: got 0001 instead of MCI_NOTIFY_xyz 0002 from
command play
mci.c:149: Test failed: PeekMessage should succeed for command status
mci.c:437: Test failed: Expected full pathname from info file: tempfile.wav
err:wave:wodPlayer_WriteMaxFrags Error in writing wavehdr. Reason:
Resource temporarily unavailable
err:wave:wodPlayer_WriteMaxFrags Error in writing wavehdr. Reason:
Resource temporarily unavailable
err:wave:wodPlayer_WriteMaxFrags Error in writing wavehdr. Reason:
Resource temporarily unavailable
err:wave:wodPlayer_WriteMaxFrags Error in writing wavehdr. Reason:
Resource temporarily unavailable
... 1600 dup lines removed ...
ALSA lib ../../../src/pcm/pcm.c:7228:(snd_pcm_recover) underrun occured

16 bytes in 1 blocks are definitely lost in loss record 148 of 913
by: RtlAllocateHeap (heap.c:1421)
by: mciSendStringW (mci.c:1319)
by: mciSendStringA (mci.c:1448)
by: test_openCloseWAVE (mci.c:164)
by: func_mci (mci.c:652)

I had to kill it; dunno if the leak was because I interrupted it or not.
- Dan

Dan Kegel wrote:
> I had a new hang on yesterday's git under valgrind:
> err:wave:wodPlayer_WriteMaxFrags Error in writing wavehdr. Reason:
> Resource temporarily unavailable
> ... 1600 dup lines removed ...
> ALSA lib ../../../src/pcm/pcm.c:7228:(snd_pcm_recover) underrun occured

Good that I'm not alone. I had these specific two yesterday for the first time
ever as well, without valgrind.  I attributed it to "yet another flaky error
in the audio drivers" -- I mean I don't entirely trust the audio drivers because
winmm/tests/wave.c has shown flaky failures (WOD_PREPARED msg) for ages,
without being driven by the MCI.
IIRC, Wine did not hang as I waited long enough, but maybe I did ^C.

Facts:
 - The MCI play loop is still buggy w.r.t. sample size (witness the 333ms multiples)
   That could explain the underrun log that I've also seen (which I believe is a very recent
   log addition from Maarten).
 - winmm/wave.ok produces errors from time to time in test.winehq as well as on my machines.

Suppositions:
 - the broken MCI play loop causes the above errors, randomly. But we have nothing to prove that.

Well, I don't know where to look for the wave.ok intermittent failures (not in MCI), but
my goal is to write a correct MCI play/record loop that will also be usable in mciavi32.

Oh well, another piece to the puzzle: using my interactive MCI shell,
play 2 sounds in parallel [*].  *Sometimes* the second one manages to halt
the first sound. I see no reason/code in MCI's waveaudio that can do that! The
error must be elsewhere (-> wave or audio drivers).

[*]
open long-sound.wav alias a
open other.wav alias b
play a from 0
play b from 0
Repeat play until a is interrupted (i.e. nothing is heard any more).
The playloop appears to hang.

Regards,
 Jörg Höhle