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sink, source: Add a latency offset which is inherited from the port

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A latency offset variable was added to the sink/source struct.

Also a function was introduced to update the latency offset of the
sink/source and a new message type was introduced so we can send the latency
offset to the IO thread.

The latency offset is automatically populated with the latency from the
currently active port.
This commit is contained in:
poljar 2012-06-22 20:55:54 +02:00 • committed by Tanu Kaskinen
parent bc03487896
commit eebdda456b
5 changed files with 92 additions and 0 deletions
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26
src/pulsecore/source.c
View file

@ -296,6 +296,11 @@ pa_source* pa_source_new(
s->active_port = p;
}
if (s->active_port)
s->latency_offset = s->active_port->latency_offset;
else
s->latency_offset = 0;
s->save_volume = data->save_volume;
s->save_muted = data->save_muted;
@ -323,6 +328,7 @@ pa_source* pa_source_new(
pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
s->thread_info.volume_change_safety_margin = core->deferred_volume_safety_margin_usec;
s->thread_info.volume_change_extra_delay = core->deferred_volume_extra_delay_usec;
s->thread_info.latency_offset = s->latency_offset;
/* FIXME: This should probably be moved to pa_source_put() */
pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
@ -1024,6 +1030,8 @@ pa_usec_t pa_source_get_latency(pa_source *s) {
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
usec += s->latency_offset;
return usec;
}
@ -1051,6 +1059,8 @@ pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
if (o->process_msg(o, PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
return -1;
usec += s->thread_info.latency_offset;
return usec;
}
@ -2168,6 +2178,10 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_
pa_source_get_mute(s, TRUE);
return 0;
case PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET:
s->thread_info.latency_offset = (pa_usec_t) offset;
return 0;
case PA_SOURCE_MESSAGE_MAX:
;
}
@ -2507,6 +2521,18 @@ void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency)
pa_source_invalidate_requested_latency(s, FALSE);
}
/* Called from main thread */
void pa_source_set_latency_offset(pa_source *s, pa_usec_t offset) {
pa_source_assert_ref(s);
s->latency_offset = offset;
if (PA_SOURCE_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET, NULL, (int64_t) offset, NULL) == 0);
else
s->thread_info.fixed_latency = offset;
}
/* Called from main thread */
size_t pa_source_get_max_rewind(pa_source *s) {
size_t r;