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calculate buffer sizes from sample spec

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@306 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-11-21 19:39:46 +00:00
parent 4583c22bfd
commit d45abba9aa
3 changed files with 13 additions and 15 deletions
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11
polyp/memblockq.c
View file

@ -68,18 +68,21 @@ struct pa_memblockq* pa_memblockq_new(size_t maxlength, size_t tlength, size_t b
bq->tlength = ((tlength+base-1)/base)*base;
if (!bq->tlength || bq->tlength >= bq->maxlength)
bq->tlength = bq->maxlength;
bq->minreq = (minreq/base)*base;
if (bq->minreq == 0)
bq->minreq = 1;
bq->prebuf = (prebuf == (size_t) -1) ? bq->maxlength/2 : prebuf;
bq->prebuf = (bq->prebuf/base)*base;
if (bq->prebuf > bq->maxlength)
bq->prebuf = bq->maxlength;
if (bq->prebuf > bq->tlength - bq->minreq)
bq->prebuf = bq->tlength - bq->minreq;
bq->orig_prebuf = bq->prebuf;
bq->minreq = (minreq/base)*base;
if (bq->minreq == 0)
bq->minreq = 1;
pa_log(__FILE__": memblockq sanitized: maxlength=%u, tlength=%u, base=%u, prebuf=%u, minreq=%u\n", bq->maxlength, bq->tlength, bq->base, bq->prebuf, bq->minreq);
bq->mcalign = NULL;

6
polyp/polyplib-internal.h
View file

@ -37,12 +37,6 @@
#include "strlist.h"
#include "mcalign.h"
#define DEFAULT_TLENGTH (44100*2*2/2) //(10240*8)
#define DEFAULT_MAXLENGTH ((DEFAULT_TLENGTH*3)/2)
#define DEFAULT_MINREQ 512
#define DEFAULT_PREBUF (DEFAULT_TLENGTH-DEFAULT_MINREQ)
#define DEFAULT_FRAGSIZE 1024
#define DEFAULT_TIMEOUT (10)
struct pa_context {

11
polyp/polyplib-stream.c
View file

@ -283,11 +283,12 @@ static void create_stream(struct pa_stream *s, const char *dev, const struct pa_
if (attr)
s->buffer_attr = *attr;
else {
s->buffer_attr.maxlength = DEFAULT_MAXLENGTH;
s->buffer_attr.tlength = DEFAULT_TLENGTH;
s->buffer_attr.prebuf = DEFAULT_PREBUF;
s->buffer_attr.minreq = DEFAULT_MINREQ;
s->buffer_attr.fragsize = DEFAULT_FRAGSIZE;
/* half a second */
s->buffer_attr.tlength = pa_bytes_per_second(&s->sample_spec)/2;
s->buffer_attr.maxlength = (s->buffer_attr.tlength*3)/2;
s->buffer_attr.minreq = s->buffer_attr.tlength/100;
s->buffer_attr.prebuf = s->buffer_attr.tlength - s->buffer_attr.minreq;
s->buffer_attr.fragsize = s->buffer_attr.tlength/100;
}
pa_stream_set_state(s, PA_STREAM_CREATING);