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alsa: Catch role matched streams to enable/disable modifier

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In UCM basic functions, we only assign intended roles from modifier
to sink/source, but we don't have a chance to set the ucm modifiers.
Here we amend the functions so that when roled stream starts or
stops, we have the following results:
1. stream will be routed to sink/source specified in modifier by
   module-intended-roles
2. After that, modifier will be enabled or disabled.
3. when multiple streams with matched roles of modifier start, only
   the first one will enable the modifier, and when they end, the
   last one will disable the modifier.

Signed-off-by: Feng Wei <wei.feng@freescale.com>
Signed-off-by: Arun Raghavan <arun.raghavan@collabora.co.uk>
This commit is contained in:
Feng Wei 2012-07-17 18:17:21 +08:00 • committed by Arun Raghavan
parent 801f286dfd
commit 3a92bda554
5 changed files with 148 additions and 34 deletions
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49
src/modules/alsa/alsa-ucm.c
View file

@ -1561,3 +1561,52 @@ void pa_alsa_ucm_mapping_context_free(pa_alsa_ucm_mapping_context *context) {
pa_idxset_free(context->ucm_modifiers, NULL, NULL);
}
}
/* Enable the modifier when the first stream with matched role starts */
void pa_alsa_ucm_roled_stream_begin(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
pa_alsa_ucm_modifier *mod;
if (!ucm->active_verb)
return;
PA_LLIST_FOREACH(mod, ucm->active_verb->modifiers) {
if ((mod->action_direction == dir) && (pa_streq(mod->media_role, role))) {
if (mod->enabled_counter == 0) {
const char *mod_name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
pa_log_info("Enable ucm modifier %s", mod_name);
if (snd_use_case_set(ucm->ucm_mgr, "_enamod", mod_name) < 0) {
pa_log("Failed to enable ucm modifier %s", mod_name);
}
}
mod->enabled_counter++;
break;
}
}
}
/* Disable the modifier when the last stream with matched role ends */
void pa_alsa_ucm_roled_stream_end(pa_alsa_ucm_config *ucm, const char *role, pa_direction_t dir) {
pa_alsa_ucm_modifier *mod;
if (!ucm->active_verb)
return;
PA_LLIST_FOREACH(mod, ucm->active_verb->modifiers) {
if ((mod->action_direction == dir) && (pa_streq(mod->media_role, role))) {
mod->enabled_counter--;
if (mod->enabled_counter == 0) {
const char *mod_name = pa_proplist_gets(mod->proplist, PA_ALSA_PROP_UCM_NAME);
pa_log_info("Disable ucm modifier %s", mod_name);
if (snd_use_case_set(ucm->ucm_mgr, "_dismod", mod_name) < 0) {
pa_log("Failed to disable ucm modifier %s", mod_name);
}
}
break;
}
}
}