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pulse-server: make sure we don't exceed maxlength

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Make sure the various buffer attributes don't exceed maxlength.
Add some SPA_ROUND_UP and SPA_ROUND_DOWN macros.

Fixes #2100
This commit is contained in:
Wim Taymans 2022-02-04 11:59:57 +01:00
parent 877dc77645
commit 8c10080324
2 changed files with 15 additions and 13 deletions
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3
spa/include/spa/utils/defs.h
View file

@ -228,6 +228,9 @@ struct spa_fraction {
#define SPA_RESTRICT
#endif
#define SPA_ROUND_DOWN(num,value) ((num) - ((num) % (value)))
#define SPA_ROUND_UP(num,value) ((((num) + (value) - 1) / (value)) * (value))
#define SPA_ROUND_DOWN_N(num,align) ((num) & ~((align) - 1))
#define SPA_ROUND_UP_N(num,align) SPA_ROUND_DOWN_N((num) + ((align) - 1),align)

25
src/modules/module-protocol-pulse/pulse-server.c
View file

@ -374,15 +374,14 @@ static uint32_t fix_playback_buffer_attr(struct stream *s, struct buffer_attr *a
if (attr->maxlength == (uint32_t) -1 || attr->maxlength > MAXLENGTH)
attr->maxlength = MAXLENGTH;
attr->maxlength -= attr->maxlength % frame_size;
attr->maxlength = SPA_MAX(attr->maxlength, frame_size);
attr->maxlength = SPA_ROUND_UP(attr->maxlength, frame_size);
minreq = SPA_MIN(minreq, attr->maxlength);
if (attr->tlength == (uint32_t) -1)
attr->tlength = frac_to_bytes_round_up(s->default_tlength, &s->ss);
if (attr->tlength > attr->maxlength)
attr->tlength = attr->maxlength;
attr->tlength -= attr->tlength % frame_size;
attr->tlength = SPA_MAX(attr->tlength, frame_size);
attr->tlength = SPA_MIN(attr->tlength, attr->maxlength);
attr->tlength = SPA_ROUND_UP(attr->tlength, frame_size);
attr->tlength = SPA_MAX(attr->tlength, minreq);
if (attr->minreq == (uint32_t) -1) {
@ -390,13 +389,13 @@ static uint32_t fix_playback_buffer_attr(struct stream *s, struct buffer_attr *a
/* With low-latency, tlength/4 gives a decent default in all of traditional,
* adjust latency and early request modes. */
uint32_t m = attr->tlength / 4;
m -= m % frame_size;
m = SPA_ROUND_DOWN(m, frame_size);
attr->minreq = SPA_MIN(process, m);
}
attr->minreq = SPA_MAX(attr->minreq, minreq);
if (attr->tlength < attr->minreq+frame_size)
attr->tlength = attr->minreq + frame_size;
attr->tlength = SPA_MIN(attr->minreq + frame_size, attr->maxlength);
if (s->early_requests) {
latency = attr->minreq;
@ -406,7 +405,7 @@ static uint32_t fix_playback_buffer_attr(struct stream *s, struct buffer_attr *a
else
latency = attr->minreq;
latency -= latency % frame_size;
latency = SPA_ROUND_DOWN(latency, frame_size);
if (attr->tlength >= latency)
attr->tlength -= latency;
@ -418,20 +417,20 @@ static uint32_t fix_playback_buffer_attr(struct stream *s, struct buffer_attr *a
}
if (attr->tlength < latency + 2 * attr->minreq)
attr->tlength = latency + 2 * attr->minreq;
attr->tlength = SPA_MIN(latency + 2 * attr->minreq, attr->maxlength);
attr->minreq -= attr->minreq % frame_size;
attr->minreq = SPA_ROUND_DOWN(attr->minreq, frame_size);
if (attr->minreq <= 0) {
attr->minreq = frame_size;
attr->tlength += frame_size*2;
}
if (attr->tlength <= attr->minreq)
attr->tlength = attr->minreq*2 + frame_size;
attr->tlength = SPA_MIN(attr->minreq*2 + frame_size, attr->maxlength);
max_prebuf = attr->tlength + frame_size - attr->minreq;
if (attr->prebuf == (uint32_t) -1 || attr->prebuf > max_prebuf)
attr->prebuf = max_prebuf;
attr->prebuf -= attr->prebuf % frame_size;
attr->prebuf = SPA_ROUND_DOWN(attr->prebuf, frame_size);
attr->fragsize = 0;