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jack: use node.lock-quantum by default

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As soon as a JACK app is started, the automatic quantum change is
disabled. This means no pulse/alsa app can change the quantum.

The only way to change the quantum is with node.force-quantum or
with the settings metadata.

This means only a JACK buffersize change (usually controlled from the
JACK app, such as in ardour) or a metadata change (from the command
line) can modify things. Both of those are usually caused by a user
action.

For JACK apps where the quantum is allowed to change automatically,
explicit rules need to be placed in the config.
This commit is contained in:
Wim Taymans 2022-02-08 18:35:12 +01:00
parent 14d252ec9d
commit fae7a1f592
2 changed files with 6 additions and 1 deletions
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2
pipewire-jack/src/pipewire-jack.c
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@ -3267,6 +3267,8 @@ jack_client_t * jack_client_open (const char *client_name,
pw_properties_set(client->props, PW_KEY_MEDIA_ROLE, "DSP");
if (pw_properties_get(client->props, PW_KEY_NODE_ALWAYS_PROCESS) == NULL)
pw_properties_set(client->props, PW_KEY_NODE_ALWAYS_PROCESS, "true");
if (pw_properties_get(client->props, PW_KEY_NODE_LOCK_QUANTUM) == NULL)
pw_properties_set(client->props, PW_KEY_NODE_LOCK_QUANTUM, "true");
pw_properties_set(client->props, PW_KEY_NODE_TRANSPORT_SYNC, "true");
client->node = pw_core_create_object(client->core,

5
src/daemon/jack.conf.in
View file

@ -65,7 +65,10 @@ context.modules = [
# global properties for all jack clients
jack.properties = {
#node.latency = 1024/48000
#node.lock-quantum = false
#node.rate = 1/48000
#node.quantum = 1024/48000
#node.lock-quantum = true
#node.force-quantum = 0
#jack.show-monitor = true
#jack.merge-monitor = false
#jack.short-name = false