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

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.

1 files changed, 13 insertions, 9 deletions

diff --git a/src/pulse/stream.c b/src/pulse/stream.c
index c4a54af6..ff3644ff 100644
--- a/src/pulse/stream.c
+++ b/src/pulse/stream.c
@@ -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);
         }
     }