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alsa: rework mixer logic

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Completely rework mixer logic. This now allows controlling a full set of
elements from a single sink's volume slider/mute button.

This also introduces sink and source "ports" that can be used to choose
different input or output ports with the UI. (i.e. "mic"/"line-in" or
"speaker"/"headphones".

The mixer paths and device maps are now configered in external
configuration files and can be tweaked as necessary.
This commit is contained in:
Lennart Poettering 2009-06-17 03:45:14 +02:00
parent e9c70ac41b
commit 31575f7766
54 changed files with 7029 additions and 1694 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/modules/udev-util.c
View file

@ -58,7 +58,7 @@ static int read_id(struct udev_device *d, const char *n) {
return u;
}
int pa_udev_get_info(pa_core *core, pa_proplist *p, int card_idx) {
int pa_udev_get_info(int card_idx, pa_proplist *p) {
int r = -1;
struct udev *udev;
struct udev_device *card = NULL;
@ -66,7 +66,6 @@ int pa_udev_get_info(pa_core *core, pa_proplist *p, int card_idx) {
const char *v;
int id;
pa_assert(core);
pa_assert(p);
pa_assert(card_idx >= 0);
@ -153,3 +152,40 @@ finish:
return r;
}
char* pa_udev_get_property(int card_idx, const char *name) {
struct udev *udev;
struct udev_device *card = NULL;
char *t, *r = NULL;
const char *v;
pa_assert(card_idx >= 0);
pa_assert(name);
if (!(udev = udev_new())) {
pa_log_error("Failed to allocate udev context.");
goto finish;
}
t = pa_sprintf_malloc("%s/class/sound/card%i", udev_get_sys_path(udev), card_idx);
card = udev_device_new_from_syspath(udev, t);
pa_xfree(t);
if (!card) {
pa_log_error("Failed to get card object.");
goto finish;
}
if ((v = udev_device_get_property_value(card, name)) && *v)
r = pa_xstrdup(v);
finish:
if (card)
udev_device_unref(card);
if (udev)
udev_unref(udev);
return r;
}