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Commit b9ed4f2b authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
Browse files

[ALSA] Add helper functions for frequently used callbacks 



Added helper functions for frequenty used callbacks:
  snd_ctl_boolean_mono_info() and snd_ctl_boolean_stereo_info()

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 90fd5ce5

include/sound/control.h

+8 −0
Original line number Diff line number Diff line
@@ -161,4 +161,12 @@ static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id 
	return dst_id;

}



/*

 * Frequently used control callbacks

 */

int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_info *uinfo);

int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,

				struct snd_ctl_elem_info *uinfo);



#endif	/* __SOUND_CONTROL_H */

sound/core/control.c

+27 −0
Original line number Diff line number Diff line
@@ -1486,3 +1486,30 @@ int snd_ctl_create(struct snd_card *card) 
	snd_assert(card != NULL, return -ENXIO);

	return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);

}



/*

 * Frequently used control callbacks

 */

int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_info *uinfo)

{

	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;

	uinfo->count = 1;

	uinfo->value.integer.min = 0;

	uinfo->value.integer.max = 1;

	return 0;

}



EXPORT_SYMBOL(snd_ctl_boolean_mono_info);



int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,

				struct snd_ctl_elem_info *uinfo)

{

	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;

	uinfo->count = 2;

	uinfo->value.integer.min = 0;

	uinfo->value.integer.max = 1;

	return 0;

}



EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);