* MIDI Through Port Number in ALSA Sequencer
@ 2021-07-24 10:07 rv71
2021-07-27 8:36 ` Takashi Iwai
0 siblings, 1 reply; 2+ messages in thread
From: rv71 @ 2021-07-24 10:07 UTC (permalink / raw)
To: alsa-devel@alsa-project.org
Hello,
ALSA Sequencer always creates MIDI Through Port with the id 14:0. However, I can't find where it is defined that this special port will have this particular id/number. I also don't see any definition in seq.h regarding this ( unlike the timer and announce special port, for example). Can you explain?
Thanks
Robert
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: MIDI Through Port Number in ALSA Sequencer
2021-07-24 10:07 MIDI Through Port Number in ALSA Sequencer rv71
@ 2021-07-27 8:36 ` Takashi Iwai
0 siblings, 0 replies; 2+ messages in thread
From: Takashi Iwai @ 2021-07-27 8:36 UTC (permalink / raw)
To: rv71; +Cc: alsa-devel@alsa-project.org
On Sat, 24 Jul 2021 12:07:14 +0200,
rv71@onet.eu wrote:
>
> Hello,
>
> ALSA Sequencer always creates MIDI Through Port with the id 14:0. However, I can't find where it is defined that this special port will have this particular id/number. I also don't see any definition in seq.h regarding this ( unlike the timer and announce special port, for example). Can you explain?
It's a fixed client number defined with SNDRV_SEQ_CLIENT_DUMMY in the
kernel header include/uapi/sound/asequencer.h (which will be installed
in /usr/include/sound/asequencer.h).
Oh, and now I noticed that the comment in sound/core/seq/seq_dummy.c
is with an old number that is no longer correct. Will fix up :)
Takashi
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