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urisourcebin: Ensure all stream-start are handled

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In order to ensure all initial events (stream-start, caps, ..) are present on
pads that we expose, those various sticky events are propagated (from parsebin
to multiqueue output, from multiqueue output to exposed pads).

The problem was that the "hack" in `urisourcebin` to inform downstream elements
that the stream is parsed data and a collection will be present was only done in
one place : a probe on the output of parsebin ... but the stream-start could
potentially have already been propagated to the output pads before that.

In order to fix that, we make sure any pending sticky stream-start event is
updated before being propagated.

Fixes #3788

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7604>
This commit is contained in:
Edward Hervey 2024-10-02 11:29:38 +02:00 committed by GStreamer Marge Bot
parent 7e438dfaa7
commit 94c393341c
1 changed files with 20 additions and 0 deletions
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20
subprojects/gst-plugins-base/gst/playback/gsturisourcebin.c
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@ -1208,6 +1208,19 @@ setup_multiqueue (GstURISourceBin * urisrc, ChildSrcPadInfo * info,
gst_element_sync_state_with_parent (info->multiqueue);
}
static gboolean
mark_stream_start_parsed (GstPad * pad, GstEvent ** event, gpointer user_data)
{
if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START) {
GstStructure *s;
*event = gst_event_make_writable (*event);
s = (GstStructure *) gst_event_get_structure (*event);
gst_structure_set (s, "urisourcebin-parsed-data", G_TYPE_BOOLEAN, TRUE,
NULL);
}
return TRUE;
}
/* Called with lock held */
static OutputSlotInfo *
new_output_slot (ChildSrcPadInfo * info, GstPad * originating_pad)
@ -1247,6 +1260,13 @@ new_output_slot (ChildSrcPadInfo * info, GstPad * originating_pad)
slot->queue_sinkpad =
gst_element_request_pad_simple (info->multiqueue, "sink_%u");
srcpad = gst_pad_get_single_internal_link (slot->queue_sinkpad);
if (urisrc->is_adaptive || (slot->linked_info
&& slot->linked_info->demuxer_is_parsebin)) {
/* This is a temporary hack to notify downstream decodebin3 to *not*
* plug in an extra parsebin */
gst_pad_sticky_events_foreach (originating_pad, mark_stream_start_parsed,
NULL);
}
gst_pad_sticky_events_foreach (originating_pad, copy_sticky_events, srcpad);
slot->output_pad = create_output_pad (slot, srcpad);
gst_object_unref (srcpad);