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decklink: Add a clock epoch that is used as offset whenever restarting the clock

Browse source 
Otherwise we're going to return times starting at 0 again after shutting down
an element for a specific input/output and then using it again later.

https://bugzilla.gnome.org/show_bug.cgi?id=755426
This commit is contained in:
Sebastian Dröge 2015-09-23 15:56:26 +02:00
parent e0fd5317df
commit 9764e22a5c
4 changed files with 10 additions and 2 deletions
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2
sys/decklink/gstdecklink.cpp
View file

@ -885,6 +885,7 @@ gst_decklink_clock_get_internal_time (GstClock * clock)
self->input->clock_last_time = result;
}
result += self->input->clock_epoch;
g_mutex_unlock (&self->input->lock);
} else if (self->output != NULL) {
g_mutex_lock (&self->output->lock);
@ -924,6 +925,7 @@ gst_decklink_clock_get_internal_time (GstClock * clock)
self->output->clock_last_time = result;
}
result += self->output->clock_epoch;
g_mutex_unlock (&self->output->lock);
} else {
g_assert_not_reached ();

4
sys/decklink/gstdecklink.h
View file

@ -134,7 +134,7 @@ struct _GstDecklinkOutput {
IDeckLink *device;
IDeckLinkOutput *output;
GstClock *clock;
GstClockTime clock_start_time, clock_last_time;
GstClockTime clock_start_time, clock_last_time, clock_epoch;
GstClockTimeDiff clock_offset;
gboolean started, clock_restart;
@ -162,7 +162,7 @@ struct _GstDecklinkInput {
IDeckLinkConfiguration *config;
IDeckLinkAttributes *attributes;
GstClock *clock;
GstClockTime clock_start_time, clock_offset, clock_last_time;
GstClockTime clock_start_time, clock_offset, clock_last_time, clock_epoch;
gboolean started, clock_restart;
/* Everything below protected by mutex */

3
sys/decklink/gstdecklinkvideosink.cpp
View file

@ -558,6 +558,7 @@ gst_decklink_video_sink_open (GstBaseSink * bsink)
self->output->start_scheduled_playback =
gst_decklink_video_sink_start_scheduled_playback;
self->output->clock_start_time = GST_CLOCK_TIME_NONE;
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
g_mutex_unlock (&self->output->lock);
@ -706,6 +707,7 @@ gst_decklink_video_sink_change_state (GstElement * element,
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (&self->output->lock);
self->output->clock_start_time = GST_CLOCK_TIME_NONE;
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
g_mutex_unlock (&self->output->lock);
@ -746,6 +748,7 @@ gst_decklink_video_sink_change_state (GstElement * element,
gst_clock_set_calibration (self->output->clock, 0, 0, 1, 1);
g_mutex_lock (&self->output->lock);
self->output->clock_start_time = GST_CLOCK_TIME_NONE;
self->output->clock_epoch += self->output->clock_last_time;
self->output->clock_last_time = 0;
self->output->clock_offset = 0;
g_mutex_unlock (&self->output->lock);

3
sys/decklink/gstdecklinkvideosrc.cpp
View file

@ -645,6 +645,7 @@ gst_decklink_video_src_open (GstDecklinkVideoSrc * self)
self->input->got_video_frame = gst_decklink_video_src_got_frame;
self->input->start_streams = gst_decklink_video_src_start_streams;
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_epoch += self->input->clock_last_time;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);
@ -752,6 +753,7 @@ gst_decklink_video_src_change_state (GstElement * element,
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_mutex_lock (&self->input->lock);
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_epoch += self->input->clock_last_time;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);
@ -790,6 +792,7 @@ gst_decklink_video_src_change_state (GstElement * element,
gst_clock_set_calibration (self->input->clock, 0, 0, 1, 1);
g_mutex_lock (&self->input->lock);
self->input->clock_start_time = GST_CLOCK_TIME_NONE;
self->input->clock_epoch += self->input->clock_last_time;
self->input->clock_last_time = 0;
self->input->clock_offset = 0;
g_mutex_unlock (&self->input->lock);