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mixer: simple - Unify simple_none: base_len() exception handling

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Unify simple_none: base_len() exception handling:

1. In the "Input Source" and "3D Control" cases the base-name is the same
   as the full-name and base_len() simply returns strlen(name).
   Instead of returning 0 when the type is unknown, set the type to
   CTL_SINGLE and return strlen(name). This allows removing the special
   case for base_len() returning 0 in simple_event_add().

2. Move the special handling for "Capture Volume" and "Capture Switch"
   from simple_event_add() to base_len(), so that we handle all exceptions
   inside base_len(). Instead of handling some special cases in base_len()
   and other special cases in simple_event_add().

[jk - moved the "Capture Volume" and "Capture Switch" to "Input Source"
exceptions]

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Hans de Goede 2021-02-28 17:13:02 +01:00 • committed by Jaroslav Kysela
parent 33ddf2e1c7
commit 86b9c67774
1 changed files with 25 additions and 18 deletions
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33
src/mixer/simple_none.c
View file

@ -907,11 +907,12 @@ static const struct suf {
};
#endif
/* Return base length or 0 on failure */
/* Return base length */
static int base_len(const char *name, selem_ctl_type_t *type)
{
const struct suf *p;
size_t nlen = strlen(name);
p = suffixes;
while (p->suffix) {
size_t slen = strlen(p->suffix);
@ -927,6 +928,16 @@ static int base_len(const char *name, selem_ctl_type_t *type)
p++;
}
/* exception: "Capture Volume" and "Capture Switch" */
if (!strcmp(name, "Capture Volume")) {
*type = CTL_CAPTURE_VOLUME;
return strlen("Capture");
}
if (!strcmp(name, "Capture Switch")) {
*type = CTL_CAPTURE_SWITCH;
return strlen("Capture");
}
/* Special case - handle "Input Source" as a capture route.
* Note that it's *NO* capture source. A capture source is split over
* sub-elements, and multiple capture-sources will result in an error.
@ -944,7 +955,9 @@ static int base_len(const char *name, selem_ctl_type_t *type)
return strlen(name);
}
}
return 0;
*type = CTL_SINGLE;
return strlen(name);
}
@ -1605,8 +1618,10 @@ static int simple_add1(snd_mixer_class_t *class, const char *name,
static int simple_event_add(snd_mixer_class_t *class, snd_hctl_elem_t *helem)
{
const char *name = snd_hctl_elem_get_name(helem);
selem_ctl_type_t type;
char ename[128];
size_t len;
selem_ctl_type_t type = CTL_SINGLE; /* to shut up warning */
if (snd_hctl_elem_get_interface(helem) != SND_CTL_ELEM_IFACE_MIXER)
return 0;
if (strcmp(name, "Capture Source") == 0) {
@ -1633,23 +1648,15 @@ static int simple_event_add(snd_mixer_class_t *class, snd_hctl_elem_t *helem)
}
return 0;
}
len = base_len(name, &type);
if (len == 0) {
return simple_add1(class, name, helem, CTL_SINGLE, 0);
} else {
char ename[128];
if (len >= sizeof(ename))
len = sizeof(ename) - 1;
memcpy(ename, name, len);
ename[len] = 0;
/* exception: Capture Volume and Capture Switch */
if (type == CTL_GLOBAL_VOLUME && !strcmp(ename, "Capture"))
type = CTL_CAPTURE_VOLUME;
else if (type == CTL_GLOBAL_SWITCH && !strcmp(ename, "Capture"))
type = CTL_CAPTURE_SWITCH;
return simple_add1(class, ename, helem, type, 0);
}
}
static int simple_event_remove(snd_hctl_elem_t *helem,
snd_mixer_elem_t *melem)