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Add accessor to user control elements

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Added accessor functions to user control elements, snd_ctl_elem_add_*(),
and_ctl_elem_remove() and snd_ctl_elem_info_is_user().
This commit is contained in:
Takashi Iwai 2005-01-03 11:52:39 +00:00
parent 77348e830f
commit 0732cce6f0
4 changed files with 133 additions and 33 deletions
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23
src/pcm/pcm_softvol.c
View file

@ -333,23 +333,9 @@ static void snd_pcm_softvol_dump(snd_pcm_t *pcm, snd_output_t *out)
int snd_ctl_elem_add(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
int snd_ctl_elem_replace(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
static int add_user_ctl(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo, int replace)
static int add_user_ctl(snd_pcm_softvol_t *svol, snd_ctl_elem_info_t *cinfo)
{
int err;
cinfo->type = SND_CTL_ELEM_TYPE_INTEGER;
cinfo->count = 1;
cinfo->value.integer.min = 0;
cinfo->value.integer.max = svol->max_val;
if (replace)
err = snd_ctl_elem_replace(svol->ctl, cinfo);
else
err = snd_ctl_elem_add(svol->ctl, cinfo);
if (err < 0)
return err;
/* initialize */
svol->elem.value.integer.value[0] = 0;
return snd_ctl_elem_write(svol->ctl, &svol->elem);
return snd_ctl_elem_add_integer(svol->ctl, &cinfo->id, 1, 0, svol->max_val, 0);
}
static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
@ -392,7 +378,7 @@ static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
SNDERR("Cannot get info for CTL %s", ctl_name);
return err;
}
err = add_user_ctl(svol, cinfo, 0);
err = add_user_ctl(svol, cinfo);
if (err < 0) {
SNDERR("Cannot add a control");
return err;
@ -406,7 +392,8 @@ static int softvol_load_control(snd_pcm_t *pcm, snd_pcm_softvol_t *svol,
SNDERR("Invalid control");
return -EINVAL;
}
err = add_user_ctl(svol, cinfo, 1);
snd_ctl_elem_remove(svol->ctl, &cinfo->id);
err = add_user_ctl(svol, cinfo);
if (err < 0) {
SNDERR("Cannot replace a control");
return err;