diff options
| author | Takashi Iwai <tiwai@suse.de> | 2023-06-12 10:10:49 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-06-12 18:22:29 +0200 |
| commit | 5437ac9bad639bb9112e1a749acbe4a143562cdc (patch) | |
| tree | 1e81649daf96580342a41ee264cad0f8613df918 /include/uapi/sound | |
| parent | 960a1149c8fa70c221c70eaa13903ff873ba1873 (diff) | |
ALSA: seq: ump: Handle groupless messages
The UMP Utility and Stream messages are "groupless", i.e. an incoming
groupless packet should be sent only to the UMP EP port, and the event
with the groupless message is sent to UMP EP as is without the group
translation per port.
Also, the former reserved bit 0 for the client group filter is now
used for groupless events. When the bit 0 is set, the groupless
events are filtered out and skipped.
Link: https://lore.kernel.org/r/20230612081054.17200-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/uapi/sound')
| -rw-r--r-- | include/uapi/sound/asequencer.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/uapi/sound/asequencer.h b/include/uapi/sound/asequencer.h index 5e91243665d8..b5bc8604efe8 100644 --- a/include/uapi/sound/asequencer.h +++ b/include/uapi/sound/asequencer.h @@ -362,7 +362,10 @@ struct snd_seq_client_info { int card; /* RO: card number[kernel] */ int pid; /* RO: pid[user] */ unsigned int midi_version; /* MIDI version */ - unsigned int group_filter; /* UMP group filter bitmap (for 1-based Group indices) */ + unsigned int group_filter; /* UMP group filter bitmap + * (bit 0 = groupless messages, + * bit 1-16 = messages for groups 1-16) + */ char reserved[48]; /* for future use */ }; |