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control: Add UMP device query support

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Add a function to query the next available UMP device via control
interface, just like the existing one for rawmidi.  As the UMP rawmidi
is compatible with the standard rawmidi, no extra helper for the
rawmidi_info is present.  Ditto for the preferred subdevice, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2022-12-25 12:09:51 +01:00
parent f47763d2c1
commit 8bc10c83b1
5 changed files with 26 additions and 0 deletions
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1
src/control/control_local.h
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@ -47,6 +47,7 @@ typedef struct _snd_ctl_ops {
int (*rawmidi_next_device)(snd_ctl_t *handle, int *device);
int (*rawmidi_info)(snd_ctl_t *handle, snd_rawmidi_info_t * info);
int (*rawmidi_prefer_subdevice)(snd_ctl_t *handle, int subdev);
int (*ump_next_device)(snd_ctl_t *handle, int *device);
int (*set_power_state)(snd_ctl_t *handle, unsigned int state);
int (*get_power_state)(snd_ctl_t *handle, unsigned int *state);
int (*read)(snd_ctl_t *handle, snd_ctl_event_t *event);