[LMMS-devel] Bug: segfault when using looped samples

[Bernhard S. <ber...@in...>]

Hi!

I think I've found a bug (leading to a segfault) in LMMS concerning the 
audiofile processor plugin and the use of looped samples.

Steps to reproduce:
1. Open a sample, for example "stringsnpads/orion_string01.ogg"
2. A window displaying the audiofile processor settings shows up. Activate 
looping here.
3. Play the sample for some seconds.

LMMS crashes due to a segfault. If it doesn't, try to play other notes. 
Especially when playing the sample in its original frequency, LMMS is likely 
to crash.

Here's a gdb backtrace of the crash:

#0  0x080a06de in sampleBuffer::play (this=0x14, _ab=0x86039d0, 
_start_frame=140525608, _frames=16384, _freq=440, _looped=true,
    _resampling_data=0x8663e38) at sample_buffer.cpp:837
#1  0xb707c7d8 in audioFileProcessor::playNote (this=0x86bd660, _n=0x8663dd0) 
at note_play_handle.h:108
#2  0x081204e1 in instrumentTrack::playNote (this=0x8673aa0, _n=0x8663dd0) at 
instrument_track.cpp:720
#3  0x0812052e in notePlayHandle::play (this=0x8663dd0) at 
note_play_handle.cpp:128
#4  0x08138eaa in mixer::renderNextBuffer (this=0x8387068) at mixer.cpp:274
#5  0x081393a8 in audioDevice::getNextBuffer (this=0x8436e20, _ab=0x8428ae0) 
at audio_device.h:167
#6  0x0813a56b in audioALSA::run (this=0x8436e20) at audio_alsa.cpp:228
#7  0xb7a5bee9 in QThreadInstance::start () from /usr/lib/libqt-mt.so.3
#8  0xb74be420 in start_thread () from /lib/libpthread.so.0
#9  0xb72f139e in clone () from /lib/libc.so.6

I'm using the current (actually yesterday's) CVS version of LMMS.

BTW, LMMS looks very promising, keep up the excellent work!


HAND,
Bernhard Stiftner