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Modify smoothing code to make cubic interpolation optional and allow 'quick fixups' on resuming

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The primary reason for this change is to allow time graphs that do not
go through the origin and hence smoothing starting from the origin is
not desired. This change will allow passing time data into the smoother
while paused and then abruptly use that data without smoothing using the
'quick fixup' flag when resuming.

Primary use case is allowing recording time graphs where the data
recorded originates from a time before the stream was created. The
resulting graft will be shifted and should not be smoothened to go
through the origin.
This commit is contained in:
Lennart Poettering 2009-04-05 02:26:02 +02:00
parent 1c26d7e174
commit d035f4a3f3
12 changed files with 136 additions and 43 deletions
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22
src/pulse/stream.c
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@ -393,7 +393,8 @@ static void check_smoother_status(pa_stream *s, pa_bool_t aposteriori, pa_bool_t
if (s->suspended || s->corked || force_stop)
pa_smoother_pause(s->smoother, x);
else if (force_start || s->buffer_attr.prebuf == 0)
pa_smoother_resume(s->smoother, x);
pa_smoother_resume(s->smoother, x, TRUE);
/* Please note that we have no idea if playback actually started
* if prebuf is non-zero! */
@ -1064,14 +1065,17 @@ static int create_stream(
if (flags & PA_STREAM_INTERPOLATE_TIMING) {
pa_usec_t x;
if (s->smoother)
pa_smoother_free(s->smoother);
s->smoother = pa_smoother_new(SMOOTHER_ADJUST_TIME, SMOOTHER_HISTORY_TIME, !(flags & PA_STREAM_NOT_MONOTONIC), SMOOTHER_MIN_HISTORY);
x = pa_rtclock_usec();
pa_smoother_set_time_offset(s->smoother, x);
pa_smoother_pause(s->smoother, x);
pa_assert(!s->smoother);
s->smoother = pa_smoother_new(
SMOOTHER_ADJUST_TIME,
SMOOTHER_HISTORY_TIME,
!(flags & PA_STREAM_NOT_MONOTONIC),
TRUE,
SMOOTHER_MIN_HISTORY,
x,
TRUE);
}
if (!dev)
@ -1623,7 +1627,7 @@ static void stream_get_timing_info_callback(pa_pdispatch *pd, uint32_t command,
pa_smoother_put(o->stream->smoother, u, calc_time(o->stream, TRUE));
if (i->playing)
pa_smoother_resume(o->stream->smoother, x);
pa_smoother_resume(o->stream->smoother, x, TRUE);
}
}