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echo-cancel: improve accuracy

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Make the echo canceler drift up to 1ms now that things are more accurate.
Add 10 samples of headroom to allow for timing inaccuracies.
This commit is contained in:
Wim Taymans 2010-09-09 12:39:15 +02:00 • committed by Colin Guthrie
parent c47d689613
commit 7b873785ca
1 changed files with 5 additions and 1 deletions
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6
src/modules/echo-cancel/module-echo-cancel.c
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@ -295,7 +295,7 @@ static void time_callback(pa_mainloop_api *a, pa_time_event *e, const struct tim
new_rate = base_rate;
}
else {
if (diff_time > 4000) {
if (diff_time > 1000) {
/* diff too big, quickly adjust */
pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_APPLY_DIFF_TIME,
NULL, diff_time, NULL, NULL);
@ -594,6 +594,10 @@ static void apply_diff_time(struct userdata *u, int64_t diff_time) {
diff = pa_usec_to_bytes (-diff_time, &u->source_output->sample_spec);
if (diff > 0) {
/* add some extra safety samples to compensate for jitter in the
* timings */
diff += 10 * pa_frame_size (&u->source_output->sample_spec);
pa_log_info("Playback after capture (%lld), drop sink %lld", (long long) diff_time, (long long) diff);
u->sink_skip = diff;