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Control API - add TLV support

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snd_ctl_elem_tlv_read
snd_ctl_elem_tlv_write
snd_ctl_elem_tlv_command
snd_ctl_elem_info_is_tlv_readable
snd_ctl_elem_info_is_tlv_writable
snd_ctl_elem_info_is_tlv_commandable
snd_hctl_elem_tlv_read
snd_hctl_elem_tlv_write
snd_hctl_elem_tlv_command
This commit is contained in:
Jaroslav Kysela 2006-07-05 17:42:16 +02:00
parent 408697bfe2
commit c7a0708a23
7 changed files with 248 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

16
include/sound/asound.h
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@ -756,10 +756,15 @@ enum sndrv_ctl_elem_iface {
#define SNDRV_CTL_ELEM_ACCESS_WRITE (1<<1)
#define SNDRV_CTL_ELEM_ACCESS_READWRITE (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
#define SNDRV_CTL_ELEM_ACCESS_VOLATILE (1<<2) /* control value may be changed without a notification */
#define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP (1<<2) /* when was control changed */
#define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP (1<<3) /* when was control changed */
#define SNDRV_CTL_ELEM_ACCESS_TLV_READ (1<<4) /* TLV read is supported */
#define SNDRV_CTL_ELEM_ACCESS_TLV_WRITE (1<<5) /* TLV write is supported */
#define SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE (SNDRV_CTL_ELEM_ACCESS_TLV_READ|SNDRV_CTL_ELEM_ACCESS_TLV_WRITE)
#define SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND (1<<6) /* TLV command is possible */
#define SNDRV_CTL_ELEM_ACCESS_INACTIVE (1<<8) /* control does actually nothing, but may be updated */
#define SNDRV_CTL_ELEM_ACCESS_LOCK (1<<9) /* write lock */
#define SNDRV_CTL_ELEM_ACCESS_OWNER (1<<10) /* write lock owner */
#define SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK (1<<28) /* flag only for kernel */
#define SNDRV_CTL_ELEM_ACCESS_USER (1<<29) /* user space element */
#define SNDRV_CTL_ELEM_ACCESS_DINDIRECT (1<<30) /* indirect access for matrix dimensions in the info structure */
#define SNDRV_CTL_ELEM_ACCESS_INDIRECT (1<<31) /* indirect access for element value in the value structure */
@ -847,6 +852,12 @@ struct sndrv_ctl_elem_value {
unsigned char reserved[128-sizeof(struct timespec)];
};
struct sndrv_ctl_tlv {
unsigned int numid; /* control element numeric identification */
unsigned int length; /* in bytes aligned to 4 */
unsigned int tlv[0]; /* first TLV */
};
enum {
SNDRV_CTL_IOCTL_PVERSION = _IOR('U', 0x00, int),
SNDRV_CTL_IOCTL_CARD_INFO = _IOR('U', 0x01, struct sndrv_ctl_card_info),
@ -860,6 +871,9 @@ enum {
SNDRV_CTL_IOCTL_ELEM_ADD = _IOWR('U', 0x17, struct sndrv_ctl_elem_info),
SNDRV_CTL_IOCTL_ELEM_REPLACE = _IOWR('U', 0x18, struct sndrv_ctl_elem_info),
SNDRV_CTL_IOCTL_ELEM_REMOVE = _IOWR('U', 0x19, struct sndrv_ctl_elem_id),
SNDRV_CTL_IOCTL_TLV_READ = _IOWR('U', 0x1a, struct sndrv_ctl_tlv),
SNDRV_CTL_IOCTL_TLV_WRITE = _IOWR('U', 0x1b, struct sndrv_ctl_tlv),
SNDRV_CTL_IOCTL_TLV_COMMAND = _IOWR('U', 0x1c, struct sndrv_ctl_tlv),
SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE = _IOWR('U', 0x20, int),
SNDRV_CTL_IOCTL_HWDEP_INFO = _IOR('U', 0x21, struct sndrv_hwdep_info),
SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE = _IOR('U', 0x30, int),