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add API to allow runtime reconfiguration of memblockqs

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2063 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-11-21 01:19:28 +00:00
parent 07832d080a
commit d1d07783e0
2 changed files with 78 additions and 23 deletions
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95
src/pulsecore/memblockq.c
View file

@ -72,7 +72,6 @@ pa_memblockq* pa_memblockq_new(
pa_memblockq* bq;
pa_assert(base > 0);
pa_assert(maxlength >= base);
bq = pa_xnew(pa_memblockq, 1);
bq->blocks = bq->blocks_tail = NULL;
@ -84,36 +83,20 @@ pa_memblockq* pa_memblockq_new(
pa_log_debug("memblockq requested: maxlength=%lu, tlength=%lu, base=%lu, prebuf=%lu, minreq=%lu",
(unsigned long) maxlength, (unsigned long) tlength, (unsigned long) base, (unsigned long) prebuf, (unsigned long) minreq);
bq->maxlength = ((maxlength+base-1)/base)*base;
pa_assert(bq->maxlength >= base);
bq->missing = bq->requested = bq->maxlength = bq->tlength = bq->prebuf = bq->minreq = 0;
bq->in_prebuf = TRUE;
bq->tlength = ((tlength+base-1)/base)*base;
if (bq->tlength <= 0 || bq->tlength > bq->maxlength)
bq->tlength = bq->maxlength;
bq->prebuf = (prebuf == (size_t) -1) ? bq->tlength/2 : prebuf;
bq->prebuf = ((bq->prebuf+base-1)/base)*base;
if (bq->prebuf > bq->maxlength)
bq->prebuf = bq->maxlength;
bq->minreq = (minreq/base)*base;
if (bq->minreq > bq->tlength - bq->prebuf)
bq->minreq = bq->tlength - bq->prebuf;
if (!bq->minreq)
bq->minreq = 1;
pa_memblockq_set_maxlength(bq, maxlength);
pa_memblockq_set_tlength(bq, tlength);
pa_memblockq_set_prebuf(bq, prebuf);
pa_memblockq_set_minreq(bq, minreq);
pa_log_debug("memblockq sanitized: maxlength=%lu, tlength=%lu, base=%lu, prebuf=%lu, minreq=%lu",
(unsigned long)bq->maxlength, (unsigned long)bq->tlength, (unsigned long)bq->base, (unsigned long)bq->prebuf, (unsigned long)bq->minreq);
bq->in_prebuf = bq->prebuf > 0;
bq->silence = silence ? pa_memblock_ref(silence) : NULL;
bq->mcalign = NULL;
bq->missing = bq->tlength;
bq->requested = 0;
return bq;
}
@ -688,3 +671,69 @@ size_t pa_memblockq_pop_missing(pa_memblockq *bq) {
return l;
}
void pa_memblockq_set_maxlength(pa_memblockq *bq, size_t maxlength) {
pa_assert(bq);
bq->maxlength = ((maxlength+bq->base-1)/bq->base)*bq->base;
if (bq->maxlength < bq->base)
bq->maxlength = bq->base;
if (bq->tlength > bq->maxlength)
pa_memblockq_set_tlength(bq, bq->maxlength);
if (bq->prebuf > bq->maxlength)
pa_memblockq_set_prebuf(bq, bq->maxlength);
}
void pa_memblockq_set_tlength(pa_memblockq *bq, size_t tlength) {
size_t old_tlength;
pa_assert(bq);
old_tlength = bq->tlength;
if (tlength <= 0)
tlength = bq->maxlength;
bq->tlength = ((tlength+bq->base-1)/bq->base)*bq->base;
if (bq->tlength > bq->maxlength)
bq->tlength = bq->maxlength;
if (bq->minreq > bq->tlength - bq->prebuf)
pa_memblockq_set_minreq(bq, bq->tlength - bq->prebuf);
bq->missing += (int64_t) bq->tlength - (int64_t) old_tlength;
}
void pa_memblockq_set_prebuf(pa_memblockq *bq, size_t prebuf) {
pa_assert(bq);
bq->prebuf = (prebuf == (size_t) -1) ? bq->tlength/2 : prebuf;
bq->prebuf = ((bq->prebuf+bq->base-1)/bq->base)*bq->base;
if (prebuf > 0 && bq->prebuf < bq->base)
bq->prebuf = bq->base;
if (bq->prebuf > bq->maxlength)
bq->prebuf = bq->maxlength;
if (bq->prebuf <= 0 || pa_memblockq_get_length(bq) >= bq->prebuf)
bq->in_prebuf = FALSE;
if (bq->minreq > bq->tlength - bq->prebuf)
pa_memblockq_set_minreq(bq, bq->tlength - bq->prebuf);
}
void pa_memblockq_set_minreq(pa_memblockq *bq, size_t minreq) {
pa_assert(bq);
bq->minreq = (minreq/bq->base)*bq->base;
if (bq->minreq > bq->tlength - bq->prebuf)
bq->minreq = bq->tlength - bq->prebuf;
if (bq->minreq < bq->base)
bq->minreq = bq->base;
}

6
src/pulsecore/memblockq.h
View file

@ -142,4 +142,10 @@ size_t pa_memblockq_get_maxlength(pa_memblockq *bq);
/* Return the prebuffer length in bytes */
size_t pa_memblockq_get_prebuf(pa_memblockq *bq);
/* Change metrics. */
void pa_memblockq_set_maxlength(pa_memblockq *memblockq, size_t maxlength);
void pa_memblockq_set_tlength(pa_memblockq *memblockq, size_t tlength);
void pa_memblockq_set_prebuf(pa_memblockq *memblockq, size_t prebuf);
void pa_memblockq_set_minreq(pa_memblockq *memblockq, size_t minreq);
#endif