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control: enhance doc for snd_ctl_ascii_value_parse() function

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2013-04-11 13:36:56 +02:00
parent 91de1212d0
commit 201f28a008
1 changed files with 3 additions and 0 deletions
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3
src/control/ctlparse.c
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@ -302,6 +302,9 @@ static int get_ctl_enum_item_index(snd_ctl_t *handle,
* \param info CTL element info structure * \param info CTL element info structure
* \param value source ASCII string * \param value source ASCII string
* \return zero on success, otherwise a negative error code * \return zero on success, otherwise a negative error code
*
* Note: For toggle command, the dst must contain previous (current)
* state (do the #snd_ctl_elem_read call to obtain it).
*/ */
int snd_ctl_ascii_value_parse(snd_ctl_t *handle, int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
snd_ctl_elem_value_t *dst, snd_ctl_elem_value_t *dst,