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| author |   Takashi Iwai <tiwai@suse.de> | 2014-02-19 14:30:29 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-02-02 14:21:21 +0100 |
| commit | 23c18d4bfd73ee24070849faf98b3ab01263a3c4 (patch) | |
| tree | 944e0e24bd847fdbbddd8baf5ab0976c0fdcfa81 /include/sound/control.h | |
| parent | ALSA: Allow to pass the device object to snd_register_device*() (diff) | |
| download | linux-dev-23c18d4bfd73ee24070849faf98b3ab01263a3c4.tar.xz linux-dev-23c18d4bfd73ee24070849faf98b3ab01263a3c4.zip | |
ALSA: control: Provide a helper to look for the preferred subdevice
Instead of open-coding the search over the control file loop, provide
a helper function for the preferred subdevice assigned to the current
process.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/control.h')
| -rw-r--r-- | include/sound/control.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/sound/control.h b/include/sound/control.h index 042613938a1d..75f3054023f7 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -93,12 +93,17 @@ struct snd_kctl_event { struct pid; +enum { + SND_CTL_SUBDEV_PCM, + SND_CTL_SUBDEV_RAWMIDI, + SND_CTL_SUBDEV_ITEMS, +}; + struct snd_ctl_file { struct list_head list; /* list of all control files */ struct snd_card *card; struct pid *pid; - int prefer_pcm_subdevice; - int prefer_rawmidi_subdevice; + int preferred_subdevice[SND_CTL_SUBDEV_ITEMS]; wait_queue_head_t change_sleep; spinlock_t read_lock; struct fasync_struct *fasync; @@ -138,6 +143,8 @@ int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn); #define snd_ctl_unregister_ioctl_compat(fcn) #endif +int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type); + static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id) { return id->numid - kctl->id.numid; |