[alsa-devel] [PATCH] rawmidi.c Set a name for a newly allocated rawmidi substream

[Clemens Ladisch]

Ralf Beck wrote:
> Am 07.05.2014 19:39, schrieb Clemens Ladisch:
>> Ralf Beck wrote:
>>> Rationale: Bitwig Studio (and possibly other rawmidi clients) enumerate the Midi I/Os by substream names. With the current rawmidi implementation, the name is an empty string and only the USB mididriver changes it to a meaningful value after allocation.
>>
>> Many RawMIDI devices have only one substream, or multiple substreams that are merged into one port. For these, separate substream names do not make sense.
>
> Any having no substream name at all makes more sense?

The device itself already has a name.

Apparently, Bitwig has not been tested with any driver except snd-usb-audio.

>>> This patch sets a default substream name of the form "somename x-y-z"
>>
>> The ID string is not meant to be a name.
>
> Would it be acceptable, if i remove the ID string and only return x-y-z ?

No; you should use the device name or something like that.

But the substream name buffer is rather short; a better idea would be to
fix all rawmidi drivers to set the substream name(s) to the appropriate
value.

> Other than the alsa developers i would call creating rawmidi substreams, but not
> assigning a name to them a bug.

For most drivers, substreams do not have a logical identity separate
from the device.


Regards,
Clemens