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card: Add card profile availability

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Some cards are capable to announce if a specific profile is available or
not, effectively predicting whether a profile switch would fail or would
likely succeed. This can for example be useful for a UI that would gray
out any unavailable profile.

In addition, this information can be useful for internal modules
implementing automatic profile-switching policies, such as
module-switch-on-port-available or module-bluetooth-policy.

In particular, this information is essential when a port is associated
to multiple card profiles and therefore the port availability flag does
not provide enough information. The port "bluetooth-output" falls into
this category, for example, since it doesn't distinguish HSP/HFP from
A2DP.
This commit is contained in:
Mikel Astiz 2013-02-18 09:10:31 +01:00 • committed by Tanu Kaskinen
parent 8851644a3c
commit afd33da56a
3 changed files with 25 additions and 0 deletions
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20
src/pulsecore/card.c
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@ -63,6 +63,26 @@ void pa_card_profile_free(pa_card_profile *c) {
pa_xfree(c);
}
void pa_card_profile_set_available(pa_card_profile *c, pa_available_t available) {
pa_core *core;
pa_assert(c);
pa_assert(c->card); /* Modify member variable directly during creation instead of using this function */
if (c->available == available)
return;
c->available = available;
pa_log_debug("Setting card %s profile %s to availability status %s", c->card->name, c->name,
available == PA_AVAILABLE_YES ? "yes" : available == PA_AVAILABLE_NO ? "no" : "unknown");
/* Post subscriptions to the card which owns us */
pa_assert_se(core = c->card->core);
pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_CARD|PA_SUBSCRIPTION_EVENT_CHANGE, c->card->index);
pa_hook_fire(&core->hooks[PA_CORE_HOOK_CARD_PROFILE_AVAILABLE_CHANGED], c);
}
pa_card_new_data* pa_card_new_data_init(pa_card_new_data *data) {
pa_assert(data);