endless loop with sync quantize and key-lock

[Daniel Schürmann]

Sometimes it happens that a track loops with around one buffer lengths after this sequence.
It seems to happens more often when the same track is loaded to both decks.

* sync track (Sync_enable)
* press quantize
* press key lock (enabled)
* press Key lock (disable) looping continues
* press quantize (disabled) looping stops

Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true
Debug [Engine]: EngineSync::notifyPlaying "[Channel2]" true

This is the backtrace from eclipse

EngineSync::notifyPlaying() at enginesync.cpp:151 0x71909c
SyncControl::qt_static_metacall() at moc_synccontrol.cc:72 0x71caa2
QMetaObject::activate() at qobject.cpp:3.539 0x7ffff57d5a58
ControlObjectSlave::valueChanged() at moc_controlobjectslave.cc:113 0x88c64e
ControlObjectSlave::qt_static_metacall() at moc_controlobjectslave.cc:64 0x88c5f1
QMetaObject::activate() at qobject.cpp:3.539 0x7ffff57d5a58
ControlDoublePrivate::valueChanged() at moc_control.cc:102 0x4de4c7
setInner() at control.cpp:162 0x4d91f7
ControlDoublePrivate::setAndConfirm() at control.cpp:153 0x4d91f7
ControlObject::setAndConfirm() at controlobject.cpp:107 0x56cda1
slotControlPlayRequest() at enginebuffer.cpp:570 0x6d935b
EngineBuffer::setNewPlaypos() at enginebuffer.cpp:423 0x6d935b
EngineBuffer::processSeek() at enginebuffer.cpp:986 0x6de626
EngineBuffer::process() at enginebuffer.cpp:671 0x6deed0
EngineDeck::process() at enginedeck.cpp:101 0x6e6a32
EngineMaster::processChannels() at enginemaster.cpp:272 0x6f08fb
EngineMaster::process() at enginemaster.cpp:295 0x6f2480
SoundManager::requestBuffer() at soundmanager.cpp:495 0x904878
SoundDevicePortAudio::callbackProcess() at sounddeviceportaudio.cpp:332 0x8ff339
0x7ffff7bb4053
0x7ffff7bb61d3
0x7ffff7bbcf68
start_thread() at pthread_create.c:311 0x7ffff32b1f6e
clone() at clone.S:113 0x7ffff1e2d9cd

[Daniel Schürmann (daschuer)]

Fixed in https://github.com/mixxxdj/mixxx/pull/174

[Daniel Schürmann (daschuer)]

Merged to master 4984d1a0b5df3a13b38ed051b7f1264ff334c193

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/7291