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core: make fixed latency dynamically changeable

Browse source 
This of course makes the name 'fixed' a bit of a misnomer. However the
definitions are now like this:

fixed latency: the latency may change during runtime, but is solely
controlled by the backend, the client has no influence.

dynamic latency: the latency may change during runtime, influenced by
the requests of the clients.

i.e. fixed vs. dynamic is from the perspective of the client.
This commit is contained in:
Lennart Poettering 2009-08-15 00:48:14 +02:00
parent 4eb59fb90e
commit 350a2bc846
10 changed files with 212 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

101
src/pulsecore/sink.c
View file

@ -256,8 +256,6 @@ pa_sink* pa_sink_new(
s->muted = data->muted;
s->refresh_volume = s->refresh_muted = FALSE;
s->fixed_latency = flags & PA_SINK_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
reset_callbacks(s);
s->userdata = NULL;
@ -307,6 +305,7 @@ pa_sink* pa_sink_new(
s->thread_info.requested_latency = 0;
s->thread_info.min_latency = ABSOLUTE_MIN_LATENCY;
s->thread_info.max_latency = ABSOLUTE_MAX_LATENCY;
s->thread_info.fixed_latency = flags & PA_SINK_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
pa_assert_se(pa_idxset_put(core->sinks, s, &s->index) >= 0);
@ -349,6 +348,7 @@ pa_sink* pa_sink_new(
s->monitor_source->monitor_of = s;
pa_source_set_latency_range(s->monitor_source, s->thread_info.min_latency, s->thread_info.max_latency);
pa_source_set_fixed_latency(s->monitor_source, s->thread_info.fixed_latency);
pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
return s;
@ -438,11 +438,11 @@ void pa_sink_put(pa_sink* s) {
pa_assert((s->flags & PA_SINK_HW_VOLUME_CTRL) || (s->base_volume == PA_VOLUME_NORM && s->flags & PA_SINK_DECIBEL_VOLUME));
pa_assert(!(s->flags & PA_SINK_DECIBEL_VOLUME) || s->n_volume_steps == PA_VOLUME_NORM+1);
pa_assert(!(s->flags & PA_SINK_DYNAMIC_LATENCY) == (s->fixed_latency != 0));
pa_assert(!(s->flags & PA_SINK_DYNAMIC_LATENCY) == (s->thread_info.fixed_latency != 0));
pa_assert(!(s->flags & PA_SINK_LATENCY) == !(s->monitor_source->flags & PA_SOURCE_LATENCY));
pa_assert(!(s->flags & PA_SINK_DYNAMIC_LATENCY) == !(s->monitor_source->flags & PA_SOURCE_DYNAMIC_LATENCY));
pa_assert(s->monitor_source->fixed_latency == s->fixed_latency);
pa_assert(s->monitor_source->thread_info.fixed_latency == s->thread_info.fixed_latency);
pa_assert(s->monitor_source->thread_info.min_latency == s->thread_info.min_latency);
pa_assert(s->monitor_source->thread_info.max_latency == s->thread_info.max_latency);
@ -1748,7 +1748,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
pa_sink_input_unref(i);
pa_sink_invalidate_requested_latency(s);
pa_sink_invalidate_requested_latency(s, TRUE);
pa_sink_request_rewind(s, (size_t) -1);
/* In flat volume mode we need to update the volume as
@ -1794,7 +1794,7 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
pa_sink_input_unref(i);
pa_sink_invalidate_requested_latency(s);
pa_sink_invalidate_requested_latency(s, TRUE);
pa_log_debug("Requesting rewind due to started move");
pa_sink_request_rewind(s, (size_t) -1);
@ -1946,6 +1946,16 @@ int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offse
return 0;
}
case PA_SINK_MESSAGE_GET_FIXED_LATENCY:
*((pa_usec_t*) userdata) = s->thread_info.fixed_latency;
return 0;
case PA_SINK_MESSAGE_SET_FIXED_LATENCY:
pa_sink_set_fixed_latency_within_thread(s, (pa_usec_t) offset);
return 0;
case PA_SINK_MESSAGE_GET_MAX_REWIND:
*((size_t*) userdata) = s->thread_info.max_rewind;
@ -2082,13 +2092,12 @@ pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
pa_sink_assert_io_context(s);
if (!(s->flags & PA_SINK_DYNAMIC_LATENCY))
return PA_CLAMP(s->fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
return PA_CLAMP(s->thread_info.fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
if (s->thread_info.requested_latency_valid)
return s->thread_info.requested_latency;
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
PA_HASHMAP_FOREACH(i, s->thread_info.inputs, state)
if (i->thread_info.requested_sink_latency != (pa_usec_t) -1 &&
(result == (pa_usec_t) -1 || result > i->thread_info.requested_sink_latency))
result = i->thread_info.requested_sink_latency;
@ -2190,18 +2199,18 @@ void pa_sink_set_max_request(pa_sink *s, size_t max_request) {
}
/* Called from IO thread */
void pa_sink_invalidate_requested_latency(pa_sink *s) {
void pa_sink_invalidate_requested_latency(pa_sink *s, pa_bool_t dynamic) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
pa_sink_assert_io_context(s);
if (!(s->flags & PA_SINK_DYNAMIC_LATENCY))
if ((s->flags & PA_SINK_DYNAMIC_LATENCY))
s->thread_info.requested_latency_valid = FALSE;
else if (dynamic)
return;
s->thread_info.requested_latency_valid = FALSE;
if (PA_SINK_IS_LINKED(s->thread_info.state)) {
if (s->update_requested_latency)
@ -2295,16 +2304,20 @@ void pa_sink_set_latency_range_within_thread(pa_sink *s, pa_usec_t min_latency,
i->update_sink_latency_range(i);
}
pa_sink_invalidate_requested_latency(s);
pa_sink_invalidate_requested_latency(s, FALSE);
pa_source_set_latency_range_within_thread(s->monitor_source, min_latency, max_latency);
}
/* Called from main thread, before the sink is put */
/* Called from main thread */
void pa_sink_set_fixed_latency(pa_sink *s, pa_usec_t latency) {
pa_sink_assert_ref(s);
pa_assert_ctl_context();
pa_assert(pa_sink_get_state(s) == PA_SINK_INIT);
if (s->flags & PA_SINK_DYNAMIC_LATENCY) {
pa_assert(latency == 0);
return;
}
if (latency < ABSOLUTE_MIN_LATENCY)
latency = ABSOLUTE_MIN_LATENCY;
@ -2312,10 +2325,64 @@ void pa_sink_set_fixed_latency(pa_sink *s, pa_usec_t latency) {
if (latency > ABSOLUTE_MAX_LATENCY)
latency = ABSOLUTE_MAX_LATENCY;
s->fixed_latency = latency;
if (PA_SINK_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_FIXED_LATENCY, NULL, (int64_t) latency, NULL) == 0);
else
s->thread_info.fixed_latency = latency;
pa_source_set_fixed_latency(s->monitor_source, latency);
}
/* Called from main thread */
pa_usec_t pa_sink_get_fixed_latency(pa_sink *s) {
pa_usec_t latency;
pa_sink_assert_ref(s);
pa_assert_ctl_context();
if (s->flags & PA_SINK_DYNAMIC_LATENCY)
return 0;
if (PA_SINK_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_FIXED_LATENCY, &latency, 0, NULL) == 0);
else
latency = s->thread_info.fixed_latency;
return latency;
}
/* Called from IO thread */
void pa_sink_set_fixed_latency_within_thread(pa_sink *s, pa_usec_t latency) {
pa_sink_assert_ref(s);
pa_sink_assert_io_context(s);
if (s->flags & PA_SINK_DYNAMIC_LATENCY) {
pa_assert(latency == 0);
return;
}
pa_assert(latency >= ABSOLUTE_MIN_LATENCY);
pa_assert(latency <= ABSOLUTE_MAX_LATENCY);
if (s->thread_info.fixed_latency == latency)
return;
s->thread_info.fixed_latency = latency;
if (PA_SINK_IS_LINKED(s->thread_info.state)) {
pa_sink_input *i;
void *state = NULL;
PA_HASHMAP_FOREACH(i, s->thread_info.inputs, state)
if (i->update_sink_fixed_latency)
i->update_sink_fixed_latency(i);
}
pa_sink_invalidate_requested_latency(s, FALSE);
pa_source_set_fixed_latency_within_thread(s->monitor_source, latency);
}
/* Called from main context */
size_t pa_sink_get_max_rewind(pa_sink *s) {
size_t r;