mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-12-17 08:56:49 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

alsa: use dynamic bandwidth

Browse source
This commit is contained in:
Wim Taymans 2018-11-12 09:55:21 +01:00
parent 3d3d86fd24
commit 0f7a3bdb2a
1 changed files with 4 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

7
spa/plugins/alsa/alsa-utils.h
View file

@ -68,6 +68,7 @@ struct dll {
double T; double T;
double b, c; double b, c;
double n0; double n0;
int count;
}; };
struct state { struct state {
@ -156,7 +157,7 @@ static inline void dll_bandwidth(struct dll *dll, double period, double rate, do
static inline void dll_init(struct dll *dll, double period, double rate, double bandwidth) static inline void dll_init(struct dll *dll, double period, double rate, double bandwidth)
{ {
dll->T = 1000000.0 / rate; dll->T = 1000000.0 / rate;
dll->n0 = 0.0; dll->count = 0;
dll_bandwidth(dll, period, rate, bandwidth); dll_bandwidth(dll, period, rate, bandwidth);
} }
@ -164,12 +165,12 @@ static inline double dll_update(struct dll *dll, double system_time, double peri
{ {
double e; double e;
if (dll->n0 == 0.0) { if (dll->count++ == 0) {
dll->n0 = system_time; dll->n0 = system_time;
} else { } else {
dll->n0 += period * dll->T; dll->n0 += period * dll->T;
e = system_time - dll->n0; e = system_time - dll->n0;
dll->n0 += dll->b * e; dll->n0 += SPA_MAX(dll->b, 1.0 / dll->count) * e;
dll->T += dll->c * e; dll->T += dll->c * e;
} }
return dll->n0; return dll->n0;