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adaptivedemux2: Implement send_event() vfunc

Browse source 
Handle select-streams and seek events in an element
level send_event() vfunc, so they can be received
before any source pads are created.

This allows preferred streams to be selected before
segment downloading starts.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2912>
This commit is contained in:
Jan Schmidt 2022-08-18 09:48:15 +10:00 committed by Tim-Philipp Müller
parent 050006e9f0
commit ba8f14e922
1 changed files with 57 additions and 15 deletions
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72
subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux.c
View file

@ -203,6 +203,8 @@ static GstStateChangeReturn gst_adaptive_demux_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_adaptive_demux_query (GstElement * element,
GstQuery * query);
static gboolean gst_adaptive_demux_send_event (GstElement * element,
GstEvent * event);
static void gst_adaptive_demux_handle_message (GstBin * bin, GstMessage * msg);
@ -214,6 +216,10 @@ static gboolean gst_adaptive_demux_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_adaptive_demux_handle_seek_event (GstAdaptiveDemux * demux,
GstEvent * event);
static gboolean gst_adaptive_demux_handle_select_streams_event (GstAdaptiveDemux
* demux, GstEvent * event);
static gboolean
gst_adaptive_demux_push_src_event (GstAdaptiveDemux * demux, GstEvent * event);
@ -529,6 +535,7 @@ gst_adaptive_demux_class_init (GstAdaptiveDemuxClass * klass)
gstelement_class->change_state = gst_adaptive_demux_change_state;
gstelement_class->query = gst_adaptive_demux_query;
gstelement_class->send_event = gst_adaptive_demux_send_event;
gstbin_class->handle_message = gst_adaptive_demux_handle_message;
@ -1420,6 +1427,32 @@ gst_adaptive_demux_query (GstElement * element, GstQuery * query)
return GST_ELEMENT_CLASS (parent_class)->query (element, query);
}
static gboolean
gst_adaptive_demux_send_event (GstElement * element, GstEvent * event)
{
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (element);
gboolean res = FALSE;
GST_DEBUG_OBJECT (demux, "Received event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
res = gst_adaptive_demux_handle_seek_event (demux, event);
break;
}
case GST_EVENT_SELECT_STREAMS:
{
res = gst_adaptive_demux_handle_select_streams_event (demux, event);
break;
}
default:
res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
break;
}
return res;
}
/* MANIFEST_LOCK held. Find the stream that owns the given element */
static GstAdaptiveDemux2Stream *
find_stream_for_element_locked (GstAdaptiveDemux * demux, GstObject * o)
@ -2600,6 +2633,29 @@ select_streams_done:
return selection_handled;
}
static gboolean
gst_adaptive_demux_handle_select_streams_event (GstAdaptiveDemux * demux,
GstEvent * event)
{
GList *streams;
gboolean selection_handled;
if (GST_EVENT_SEQNUM (event) ==
g_atomic_int_get (&demux->priv->requested_selection_seqnum)) {
GST_DEBUG_OBJECT (demux, "Already handled/handling select-streams %d",
GST_EVENT_SEQNUM (event));
return TRUE;
}
gst_event_parse_select_streams (event, &streams);
selection_handled =
handle_stream_selection (demux, streams, GST_EVENT_SEQNUM (event));
g_list_free_full (streams, g_free);
gst_event_unref (event);
return selection_handled;
}
static gboolean
gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
@ -2651,21 +2707,7 @@ gst_adaptive_demux_src_event (GstPad * pad, GstObject * parent,
}
case GST_EVENT_SELECT_STREAMS:
{
GList *streams;
gboolean selection_handled;
if (GST_EVENT_SEQNUM (event) ==
g_atomic_int_get (&demux->priv->requested_selection_seqnum)) {
GST_DEBUG_OBJECT (demux, "Already handled/handling select-streams %d",
GST_EVENT_SEQNUM (event));
return TRUE;
}
gst_event_parse_select_streams (event, &streams);
selection_handled =
handle_stream_selection (demux, streams, GST_EVENT_SEQNUM (event));
g_list_free_full (streams, g_free);
return selection_handled;
return gst_adaptive_demux_handle_select_streams_event (demux, event);
}
default:
break;