[Scummvm-tracker] [ScummVM :: Bugs] #14527: Midi dump feature not working

[ScummVM :: Bugs]

#14527: Midi dump feature not working
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Reporter:  fabianostermann  |      Owner:  (none)
    Type:  defect           |     Status:  new
Priority:  normal           |  Component:  Audio
 Version:                   |   Keywords:  MidiDriver Midi Dump Feature
    Game:  Monkey Island 2  |
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 Hi all,

 has anyone ever used the --midi-dump feature, that is build in since
 commit 3b4810a to the MidiDriver from audio/mididrv.h+cpp?

 I tested it with stable version 2.7.0, an up-to-date build from source and
 checked out the code to the state of the former commit 3b4810a in order to
 detect if it is an error that has occured while improving on the engine or
 if the error maybe is due to my setup.

 Alle three attempts failed leading to no file dump.mid was generated.
 When I forced a midi file to be written by code change, it gave me a midi
 file with header only. So, midi events are never recorded (proved it with
 debug prints) and the dump cache remains empty.

 I tested on my version of monkey1 and monkey2.
 Monkey2 directory has following files:

 ADLIB.IMS    MONKEY2.001  ROL_330.IMS  ROL_334.IMS  ROLAND.IMS
 SPEAKER.IMS
 MONKEY2.000  MONKEY2.EXE  ROL_332.IMS  ROL_336.IMS  SOUNBLAS.IMS

 Can anyone help to find the problem? Is it maybe the version of my game,
 that is not capable?

 I am trying to analyse the iMuse engine for academic research, so having
 the ability to dump midis and, in the best case, redirect events directly
 from source code to other programs would really help me.
 Rebuilding the iMuse engine in python would be the next thing I would
 check, if this approach with ScummVM does not work. So if anyone has ideas
 here, that would also be super helpful for me.

 I would appreciate it a lot if someone can provide me any hint of where to
 look next. Thanks in advance!

 (And many thanks for all the work anyone has spend on ScummVM. I use it
 for playing my favorite adventure for over 15 years now. :-D )
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Ticket URL: <https://bugs.scummvm.org/ticket/14527>
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