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[ALSA] Control API - more robust TLV implementation

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- added callback option
- added READ/WRITE/COMMAND flags to access member
- added WRITE/COMMAND ioctls
- added SNDRV_CTL_EVENT_MASK_TLV for TLV change notifications
- added TLV support to ELEM_ADD ioctl

Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Jaroslav Kysela
2006-07-05 17:34:51 +02:00
parent 6bbe13ecbb
commit 8aa9b586e4
3 changed files with 132 additions and 33 deletions
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16
include/sound/control.h
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@@ -30,6 +30,11 @@ struct snd_kcontrol;
typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,
int op_flag, /* 0=read,1=write,-1=command */
unsigned int size,
unsigned int __user *tlv);
struct snd_kcontrol_new {
snd_ctl_elem_iface_t iface; /* interface identifier */
@@ -42,7 +47,10 @@ struct snd_kcontrol_new {
snd_kcontrol_info_t *info;
snd_kcontrol_get_t *get;
snd_kcontrol_put_t *put;
unsigned int *tlv;
union {
snd_kcontrol_tlv_rw_t *c;
unsigned int *p;
} tlv;
unsigned long private_value;
};
@@ -59,7 +67,11 @@ struct snd_kcontrol {
snd_kcontrol_info_t *info;
snd_kcontrol_get_t *get;
snd_kcontrol_put_t *put;
unsigned int *tlv;
snd_kcontrol_tlv_rw_t *tlv_rw;
union {
snd_kcontrol_tlv_rw_t *c;
unsigned int *p;
} tlv;
unsigned long private_value;
void *private_data;
void (*private_free)(struct snd_kcontrol *kcontrol);