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- added support for user control elements

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This commit is contained in:
Jaroslav Kysela 2003-10-21 17:39:14 +00:00
parent 701d0614f1
commit 4a54759f1f
5 changed files with 83 additions and 3 deletions
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42
src/control/control.c
View file

@ -252,6 +252,48 @@ int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
return ctl->ops->element_info(ctl, info);
}
/**
* \brief Create and add an user CTL element
* \param ctl CTL handle
* \param info CTL element info
* \return 0 on success otherwise a negative error code
*
* Note that the new element is locked!
*/
int snd_ctl_elem_add(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
{
assert(ctl && info && info->id.name[0]);
return ctl->ops->element_add(ctl, info);
}
/**
* \brief Replace an user CTL element
* \param ctl CTL handle
* \param info CTL element info
* \return 0 on success otherwise a negative error code
*
* Note that the new element is locked!
*/
int snd_ctl_elem_replace(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
{
assert(ctl && info && info->id.name[0]);
return ctl->ops->element_replace(ctl, info);
}
/**
* \brief Remove an user CTL element
* \param ctl CTL handle
* \param id CTL element identification
* \return 0 on success otherwise a negative error code
*
* Note that the new element is locked!
*/
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
{
assert(ctl && id && (id->name[0] || id->numid));
return ctl->ops->element_remove(ctl, id);
}
/**
* \brief Get CTL element value
* \param ctl CTL handle

29
src/control/control_hw.c
View file

@ -39,7 +39,7 @@ const char *_snd_module_control_hw = "";
#endif
#define SNDRV_FILE_CONTROL "/dev/snd/controlC%i"
#define SNDRV_CTL_VERSION_MAX SNDRV_PROTOCOL_VERSION(2, 0, 2)
#define SNDRV_CTL_VERSION_MAX SNDRV_PROTOCOL_VERSION(2, 0, 3)
typedef struct {
int card;
@ -142,6 +142,30 @@ static int snd_ctl_hw_elem_info(snd_ctl_t *handle, snd_ctl_elem_info_t *info)
return 0;
}
static int snd_ctl_hw_elem_add(snd_ctl_t *handle, snd_ctl_elem_info_t *info)
{
snd_ctl_hw_t *hw = handle->private_data;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_ADD, info) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_elem_replace(snd_ctl_t *handle, snd_ctl_elem_info_t *info)
{
snd_ctl_hw_t *hw = handle->private_data;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_REPLACE, info) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_elem_remove(snd_ctl_t *handle, snd_ctl_elem_id_t *id)
{
snd_ctl_hw_t *hw = handle->private_data;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_REMOVE, id) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_elem_read(snd_ctl_t *handle, snd_ctl_elem_value_t *control)
{
snd_ctl_hw_t *hw = handle->private_data;
@ -272,6 +296,9 @@ snd_ctl_ops_t snd_ctl_hw_ops = {
.card_info = snd_ctl_hw_card_info,
.element_list = snd_ctl_hw_elem_list,
.element_info = snd_ctl_hw_elem_info,
.element_add = snd_ctl_hw_elem_add,
.element_replace = snd_ctl_hw_elem_replace,
.element_remove = snd_ctl_hw_elem_remove,
.element_read = snd_ctl_hw_elem_read,
.element_write = snd_ctl_hw_elem_write,
.element_lock = snd_ctl_hw_elem_lock,

3
src/control/control_local.h
View file

@ -29,6 +29,9 @@ typedef struct _snd_ctl_ops {
int (*card_info)(snd_ctl_t *handle, snd_ctl_card_info_t *info);
int (*element_list)(snd_ctl_t *handle, snd_ctl_elem_list_t *list);
int (*element_info)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
int (*element_add)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
int (*element_replace)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
int (*element_remove)(snd_ctl_t *handle, snd_ctl_elem_id_t *id);
int (*element_read)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
int (*element_write)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
int (*element_lock)(snd_ctl_t *handle, snd_ctl_elem_id_t *lock);