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pulse-server: Add a message to enable/disable mono mixdown

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WirePlumber recently added a mechanism to force mono mixdown on audio
outputs, which is a useful feature for accessibility. Let's also expose
that setting via libpulse for existing audio settings UIs to be able to
use.
This commit is contained in:
Arun Raghavan 2025-12-18 16:35:35 -08:00
parent 8c7890eb52
commit 385161b12a
4 changed files with 73 additions and 7 deletions
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16
src/modules/module-protocol-pulse/pulse-server.c
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@ -404,6 +404,14 @@ static void handle_metadata(struct client *client, struct pw_manager_object *old
if (client->metadata_routes == old)
client->metadata_routes = new;
}
else if (spa_streq(name, "sm-settings")) {
if (client->metadata_sm_settings == old)
client->metadata_sm_settings = new;
}
else if (spa_streq(name, "schema-sm-settings")) {
if (client->metadata_schema_sm_settings == old)
client->metadata_schema_sm_settings = new;
}
}
static uint32_t frac_to_bytes_round_up(struct spa_fraction val, const struct sample_spec *ss)
@ -964,6 +972,14 @@ static void manager_metadata(void *data, struct pw_manager_object *o,
}
if (subject == PW_ID_CORE && o == client->metadata_routes)
client_update_routes(client, key, value);
if (subject == PW_ID_CORE && o == client->metadata_schema_sm_settings) {
if (spa_streq(key, METADATA_FEATURES_AUDIO_MONO))
client->have_force_mono_audio = true;
}
if (subject == PW_ID_CORE && o == client->metadata_sm_settings) {
if (spa_streq(key, METADATA_FEATURES_AUDIO_MONO))
client->force_mono_audio = spa_streq(value, "true");
}
}