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alsa: automatically decrease watermark after a time of stability

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This commit is contained in:
Lennart Poettering 2009-08-24 03:26:56 +02:00
parent 80c6937303
commit 050a3a99e1
4 changed files with 241 additions and 84 deletions
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28
src/pulsecore/rtpoll.c
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@ -63,6 +63,7 @@ struct pa_rtpoll {
pa_bool_t running:1;
pa_bool_t rebuild_needed:1;
pa_bool_t quit:1;
pa_bool_t timer_elapsed:1;
#ifdef DEBUG_TIMING
pa_usec_t timestamp;
@ -94,26 +95,14 @@ PA_STATIC_FLIST_DECLARE(items, 0, pa_xfree);
pa_rtpoll *pa_rtpoll_new(void) {
pa_rtpoll *p;
p = pa_xnew(pa_rtpoll, 1);
p = pa_xnew0(pa_rtpoll, 1);
p->n_pollfd_alloc = 32;
p->pollfd = pa_xnew(struct pollfd, p->n_pollfd_alloc);
p->pollfd2 = pa_xnew(struct pollfd, p->n_pollfd_alloc);
p->n_pollfd_used = 0;
pa_zero(p->next_elapse);
p->timer_enabled = FALSE;
p->running = FALSE;
p->scan_for_dead = FALSE;
p->rebuild_needed = FALSE;
p->quit = FALSE;
PA_LLIST_HEAD_INIT(pa_rtpoll_item, p->items);
#ifdef DEBUG_TIMING
p->timestamp = pa_rtclock_now();
p->slept = p->awake = 0;
#endif
return p;
@ -229,6 +218,7 @@ int pa_rtpoll_run(pa_rtpoll *p, pa_bool_t wait_op) {
pa_assert(!p->running);
p->running = TRUE;
p->timer_elapsed = FALSE;
/* First, let's do some work */
for (i = p->items; i && i->priority < PA_RTPOLL_NEVER; i = i->next) {
@ -286,7 +276,7 @@ int pa_rtpoll_run(pa_rtpoll *p, pa_bool_t wait_op) {
if (p->rebuild_needed)
rtpoll_rebuild(p);
memset(&timeout, 0, sizeof(timeout));
pa_zero(timeout);
/* Calculate timeout */
if (wait_op && !p->quit && p->timer_enabled) {
@ -314,9 +304,11 @@ int pa_rtpoll_run(pa_rtpoll *p, pa_bool_t wait_op) {
r = ppoll(p->pollfd, p->n_pollfd_used, (!wait_op || p->quit || p->timer_enabled) ? &ts : NULL, NULL);
}
#else
r = poll(p->pollfd, p->n_pollfd_used, (!wait_op || p->quit || p->timer_enabled) ? (int) ((timeout.tv_sec*1000) + (timeout.tv_usec / 1000)) : -1);
r = poll(p->pollfd, p->n_pollfd_used, (!wait_op || p->quit || p->timer_enabled) ? (int) ((timeout.tv_sec*1000) + (timeout.tv_usec / 1000)) : -1);
#endif
p->timer_elapsed = r == 0;
#ifdef DEBUG_TIMING
{
pa_usec_t now = pa_rtclock_now();
@ -628,3 +620,9 @@ void pa_rtpoll_quit(pa_rtpoll *p) {
p->quit = TRUE;
}
pa_bool_t pa_rtpoll_timer_elapsed(pa_rtpoll *p) {
pa_assert(p);
return p->timer_elapsed;
}