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media-session: round buffer-size down to power of 2

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use rate of the session to calculate the buffer size and round down
to power of 2
This commit is contained in:
Wim Taymans 2018-06-22 17:31:54 +02:00
parent 73602ad98a
commit 1eae3f1a2c
1 changed files with 18 additions and 4 deletions
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22
src/modules/module-media-session.c
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@ -435,6 +435,16 @@ static int find_session(void *data, struct session *sess)
return 0;
}
static uint32_t flp2(uint32_t x)
{
x = x | (x >> 1);
x = x | (x >> 2);
x = x | (x >> 4);
x = x | (x >> 8);
x = x | (x >> 16);
return x - (x >> 1);
}
static int handle_autoconnect(struct impl *impl, struct pw_node *node,
const struct pw_properties *props)
{
@ -474,10 +484,14 @@ static int handle_autoconnect(struct impl *impl, struct pw_node *node,
else
exclusive = false;
if ((str = pw_properties_get(props, "node.latency")) != NULL)
buffer_size = atoi(str) * sizeof(float);
else
buffer_size = MAX_BUFFER_SIZE;
buffer_size = MAX_BUFFER_SIZE;
if ((str = pw_properties_get(props, "node.latency")) != NULL) {
uint32_t num, denom;
pw_log_info("module %p: '%s'", impl, str);
if (sscanf(str, "%u/%u", &num, &denom) == 2 && denom != 0) {
buffer_size = flp2((num * denom / sample_rate) * sizeof(float));
}
}
pw_log_info("module %p: '%s' '%s' '%s' exclusive:%d quantum:%d/%d", impl,
media, category, role, exclusive,