mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-31 22:25:35 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

ctl: add an API to set dimension levels to element information

Browse source 
In a former commit, 'struct snd_ctl_elem_info' is used as a 'container' to
transfer extra fields of element information for APIs to add an element
set. The extra fields should be filled in advance of call of the APIs.
Currently, dimension level is in the extra fields and no APIs to set it.

This commit adds an API to set dimension level to the information
structure. This API is expected to be used in advance of usage of APIs
to add an element set, for nothing others. When the information structure
is extended in future, then the similar APIs shall be added for the new
feature.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2016-06-29 22:43:00 +09:00 • committed by Takashi Iwai
parent f9e6011255
commit 16812b70da
2 changed files with 32 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/control/control.c
View file

@ -2457,6 +2457,36 @@ int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int
}
use_default_symbol_version(__snd_ctl_elem_info_get_dimension, snd_ctl_elem_info_get_dimension, ALSA_0.9.3);
/**
* \brief Set width to a specified dimension level of given element information.
* \param info Information of an element.
* \param dimension Dimension width for each level by member unit.
* \return Zero on success, otherwise a negative error code.
*
* \par Errors:
* <dl>
* <dt>-EINVAL
* <dd>Invalid arguments are given as parameters.
* </dl>
*/
int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info,
const int dimension[4])
{
unsigned int i;
if (info == NULL)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(info->dimen.d); i++) {
if (dimension[i] < 0)
return -EINVAL;
info->dimen.d[i] = dimension[i];
}
return 0;
}
/**
* \brief Get CTL element identifier of a CTL element id/info
* \param obj CTL element id/info