diff options
Diffstat (limited to 'polyp/module-alsa-source.c')
| -rw-r--r-- | polyp/module-alsa-source.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/polyp/module-alsa-source.c b/polyp/module-alsa-source.c index cf828eb0..41a17691 100644 --- a/polyp/module-alsa-source.c +++ b/polyp/module-alsa-source.c @@ -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); |