[Bug 47502] Wine names MIDI devices not the same as Windows

WineHQ Bugzilla wine-bugs at winehq.org
Sun Jan 3 03:39:37 CST 2021


https://bugs.winehq.org/show_bug.cgi?id=47502

Martin Rosenau <mdjrosenau at hotmail.de> changed:

           What    |Removed                     |Added
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                 CC|                            |mdjrosenau at hotmail.de

--- Comment #1 from Martin Rosenau <mdjrosenau at hotmail.de> ---
I had a similar problem with a program that uses the MIDI port for data
transfer with an electric piano.

It turned out that the program does not only check the the name but also the
"wVid" and "wPid" fields of the MIDI port.

Having a look at the latest (as of 2021-01-03) version of
"winealsa.drv/midi.c", I found out that only dummy values are returned by Wine.
A comment is saying: "FIXME Product ID".

According to another comment I have found in the sources, it is not possible to
return the same data Windows returns.

My suggestion is to allow overwriting the fields of the "MIDIINCAPS" and
"MIDIOUTCAPS" structures in a registry key so it is possible to run
vendor-specific programs.

Example registry keys:

[HKEY_CURRENT_USER\Software\Wine\Drivers\winealsa.drv\midiinports\EXAMPLE
USB-MIDI MIDI 1]
"dwSupport"=dword:00000001
"wChannelMask"=dword:0000ffff
"wPid"=dword:0000ffff
"wVoices"=dword:00000020

[HKEY_CURRENT_USER\Software\Wine\Drivers\winealsa.drv\midioutports\EXAMPLE
USB-MIDI MIDI 1]
"szPname"="Example Industries MIDI OUT"
"wMid"=dword:00001234
"wPid"=dword:0000ABCD

The registry key name ("EXAMPLE USB-MIDI MIDI 1") would be the name that would
normally be returned by Wine (the name returned by ALSA).

The values inside the key are the values that shall actually be returned in the
MIDIINCAPS and MIDIOUTCAPS structures. For values not specified in the registry
key, Wine should return the "default" (or the correct) values.

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