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decklinksrc: Implement latency query

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Implement latency query.  Fix memleak releasing resources.
This commit is contained in:
David Schleef 2012-03-17 11:41:04 -07:00
parent 83e2ca791c
commit c13e4eacc2
1 changed files with 49 additions and 4 deletions
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53
sys/decklink/gstdecklinksrc.cpp
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@ -695,6 +695,9 @@ gst_decklink_src_stop (GstElement * element)
decklinksrc->input->Release ();
decklinksrc->input = NULL;
decklinksrc->decklink->Release ();
decklinksrc->decklink = NULL;
return TRUE;
}
@ -782,8 +785,18 @@ gst_decklink_src_send_event (GstElement * element, GstEvent * event)
static gboolean
gst_decklink_src_query (GstElement * element, GstQuery * query)
{
GstDecklinkSrc *decklinksrc = GST_DECKLINK_SRC (element);
gboolean ret;
return FALSE;
GST_DEBUG_OBJECT (decklinksrc, "query");
switch (GST_QUERY_TYPE (query)) {
default:
ret = GST_ELEMENT_CLASS (parent_class)->query (element, query);
break;
}
return ret;
}
static GstCaps *
@ -1138,7 +1151,7 @@ gst_decklink_src_video_src_event (GstPad * pad, GstEvent * event)
static gboolean
gst_decklink_src_video_src_query (GstPad * pad, GstQuery * query)
{
gboolean res;
gboolean ret;
GstDecklinkSrc *decklinksrc;
decklinksrc = GST_DECKLINK_SRC (gst_pad_get_parent (pad));
@ -1146,13 +1159,45 @@ gst_decklink_src_video_src_query (GstPad * pad, GstQuery * query)
GST_DEBUG_OBJECT (decklinksrc, "query");
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
const GstDecklinkMode *mode;
/* device must be open */
if (decklinksrc->decklink == NULL) {
GST_WARNING_OBJECT (decklinksrc,
"Can't give latency since device isn't open !");
goto done;
}
mode = gst_decklink_get_mode (decklinksrc->mode);
/* min latency is the time to capture one frame */
min_latency =
gst_util_uint64_scale_int (GST_SECOND, mode->fps_d, mode->fps_n);
/* max latency is total duration of the frame buffer */
max_latency = 2 * min_latency;
GST_DEBUG_OBJECT (decklinksrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
ret = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, query);
ret = gst_pad_query_default (pad, query);
break;
}
done:
gst_object_unref (decklinksrc);
return res;
return ret;
}
static GstIterator *