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Use nanosecond time in audio_sndio

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This commit is contained in:
Mike Brady
2020-02-25 15:53:56 +00:00
parent 8bd6d8d45f
commit c2655b0388
1 changed files with 9 additions and 5 deletions
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audio_sndio.c
+9 -5
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@@ -247,7 +247,7 @@ static void stop() {
}
static void onmove_cb(__attribute__((unused)) void *arg, int delta) {
time_of_last_onmove_cb = get_absolute_time_in_fp();
time_of_last_onmove_cb = get_absolute_time_in_ns();
at_least_one_onmove_cb_seen = 1;
played += delta;
}
@@ -258,10 +258,14 @@ static int delay(long *_delay) {
if (at_least_one_onmove_cb_seen) { // when output starts, the onmove_cb callback will be made
// calculate the difference in time between now and when the last callback occurred,
// and use it to estimate the frames that would have been output
uint64_t time_difference = get_absolute_time_in_fp() - time_of_last_onmove_cb;
uint64_t frame_difference = time_difference * par.rate;
uint64_t frame_difference_big_integer = frame_difference >> 32;
estimated_extra_frames_output = frame_difference_big_integer;
uint64_t time_difference = get_absolute_time_in_ns() - time_of_last_onmove_cb;
uint64_t frame_difference = (time_difference * par.rate) / 1000000000;
estimated_extra_frames_output = frame_difference;
// sanity check -- total estimate can not exceed frames written.
if ((estimated_extra_frames_output + played) > written/framesize) {
// debug(1,"play estimate fails sanity check, possibly due to running on a VM");
estimated_extra_frames_output = 0; // can't make any sensible guess
}
// debug(1,"Frames played to last cb: %d, estimated to current time:
// %d.",played,estimated_extra_frames_output);
}