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improve latency calculation of NULL sink

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1088 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-07-14 23:59:42 +00:00
parent d43bcb31bb
commit 55a8db8efe
1 changed files with 27 additions and 7 deletions
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34
src/modules/module-null-sink.c
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@ -63,6 +63,9 @@ struct userdata {
pa_sink *sink;
pa_time_event *time_event;
size_t block_size;
uint64_t n_bytes;
struct timeval start_time;
};
static const char* const valid_modargs[] = {
@ -90,6 +93,19 @@ static void time_callback(pa_mainloop_api *m, pa_time_event*e, const struct time
pa_timeval_add(&ntv, pa_bytes_to_usec(l, &u->sink->sample_spec));
m->time_restart(e, &ntv);
u->n_bytes += l;
}
static pa_usec_t get_latency(pa_sink *s) {
struct userdata *u = s->userdata;
pa_usec_t a, b;
struct timeval now;
a = pa_timeval_diff(pa_gettimeofday(&now), &u->start_time);
b = pa_bytes_to_usec(u->n_bytes, &s->sample_spec);
return b > a ? b - a : 0;
}
int pa__init(pa_core *c, pa_module*m) {
@ -97,8 +113,9 @@ int pa__init(pa_core *c, pa_module*m) {
pa_sample_spec ss;
pa_channel_map map;
pa_modargs *ma = NULL;
struct timeval tv;
assert(c && m);
assert(c);
assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": failed to parse module arguments.");
@ -111,7 +128,7 @@ int pa__init(pa_core *c, pa_module*m) {
goto fail;
}
u = pa_xmalloc0(sizeof(struct userdata));
u = pa_xnew0(struct userdata, 1);
u->core = c;
u->module = m;
m->userdata = u;
@ -120,13 +137,16 @@ int pa__init(pa_core *c, pa_module*m) {
pa_log(__FILE__": failed to create sink.");
goto fail;
}
u->sink->get_latency = get_latency;
u->sink->userdata = u;
pa_sink_set_owner(u->sink, m);
u->sink->description = pa_sprintf_malloc("NULL sink");
u->sink->description = pa_xstrdup("NULL sink");
pa_gettimeofday(&tv);
u->time_event = c->mainloop->time_new(c->mainloop, &tv, time_callback, u);
u->n_bytes = 0;
pa_gettimeofday(&u->start_time);
u->time_event = c->mainloop->time_new(c->mainloop, &u->start_time, time_callback, u);
u->block_size = pa_bytes_per_second(&ss) / 10;