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core: make fixed latency dynamically changeable

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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

14
src/pulsecore/source.h
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@ -93,8 +93,6 @@ struct pa_source {
pa_memchunk silence;
pa_usec_t fixed_latency; /* for sources with PA_SOURCE_DYNAMIC_LATENCY this is 0 */
pa_hashmap *ports;
pa_device_port *active_port;
@ -153,7 +151,9 @@ struct pa_source {
pa_usec_t min_latency; /* we won't go below this latency */
pa_usec_t max_latency; /* An upper limit for the latencies */
} thread_info;
pa_usec_t fixed_latency; /* for sources with PA_SOURCE_DYNAMIC_LATENCY this is 0 */
} thread_info;
void *userdata;
};
@ -175,6 +175,8 @@ typedef enum pa_source_message {
PA_SOURCE_MESSAGE_DETACH,
PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
PA_SOURCE_MESSAGE_SET_FIXED_LATENCY,
PA_SOURCE_MESSAGE_GET_FIXED_LATENCY,
PA_SOURCE_MESSAGE_GET_MAX_REWIND,
PA_SOURCE_MESSAGE_SET_MAX_REWIND,
PA_SOURCE_MESSAGE_MAX
@ -250,6 +252,7 @@ int pa_source_sync_suspend(pa_source *s);
pa_usec_t pa_source_get_latency(pa_source *s);
pa_usec_t pa_source_get_requested_latency(pa_source *s);
void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
pa_usec_t pa_source_get_fixed_latency(pa_source *s);
size_t pa_source_get_max_rewind(pa_source *s);
@ -259,6 +262,7 @@ int pa_source_suspend_all(pa_core *c, pa_bool_t suspend, pa_suspend_cause_t caus
void pa_source_set_volume(pa_source *source, const pa_cvolume *volume, pa_bool_t save);
const pa_cvolume *pa_source_get_volume(pa_source *source, pa_bool_t force_refresh);
void pa_source_set_mute(pa_source *source, pa_bool_t mute, pa_bool_t save);
pa_bool_t pa_source_get_mute(pa_source *source, pa_bool_t force_refresh);
@ -290,11 +294,13 @@ void pa_source_detach_within_thread(pa_source *s);
pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind);
void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency);
/*** To be called exclusively by source output drivers, from IO context */
void pa_source_invalidate_requested_latency(pa_source *s);
void pa_source_invalidate_requested_latency(pa_source *s, pa_bool_t dynamic);
pa_usec_t pa_source_get_latency_within_thread(pa_source *s);
#define pa_source_assert_io_context(s) \