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add input latency measurement

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add GETOSPACE support to module-oss


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@205 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-09-16 00:05:56 +00:00
parent f5d47a293a
commit f9e2058820
20 changed files with 293 additions and 69 deletions
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15
polyp/module-alsa-source.c
View file

@ -143,6 +143,20 @@ static void io_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd,
do_read(u);
}
static pa_usec_t source_get_latency_cb(struct pa_source *s) {
struct userdata *u = s->userdata;
snd_pcm_sframes_t frames;
assert(s && u && u->source);
if (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
pa_log(__FILE__": failed to get delay\n");
s->get_latency = NULL;
return 0;
}
return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
}
int pa__init(struct pa_core *c, struct pa_module*m) {
struct pa_modargs *ma = NULL;
int ret = -1;
@ -191,6 +205,7 @@ int pa__init(struct pa_core *c, struct pa_module*m) {
assert(u->source);
u->source->userdata = u;
u->source->get_latency = source_get_latency_cb;
pa_source_set_owner(u->source, m);
u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s'", dev);