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playbin2: handle missing input-selector

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Gracefully degrade and disable stream selection when input-selector is
missing.
This commit is contained in:
Wim Taymans 2009-04-10 12:26:16 +02:00
parent ee03bf5379
commit f25e4e4743
1 changed files with 82 additions and 65 deletions
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69
gst/playback/gstplaybin2.c
View file

@ -369,6 +369,10 @@ struct _GstPlayBin
gint shutdown;
GValueArray *elements; /* factories we can use for selecting elements */
gboolean have_selector; /* set to FALSE when we fail to create an
* input-selector, so that we only post a
* warning once */
};
struct _GstPlayBinClass
@ -989,6 +993,9 @@ gst_play_bin_init (GstPlayBin * playbin)
playbin->lock = g_mutex_new ();
playbin->dyn_lock = g_mutex_new ();
/* assume we can create a selector */
playbin->have_selector = TRUE;
/* init groups */
playbin->curr_group = &playbin->groups[0];
playbin->next_group = &playbin->groups[1];
@ -1736,22 +1743,37 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
goto unknown_type;
GST_SOURCE_GROUP_LOCK (group);
if (select->selector == NULL) {
if (select->selector == NULL && playbin->have_selector) {
/* no selector, create one */
GST_DEBUG_OBJECT (playbin, "creating new selector");
select->selector = gst_element_factory_make ("input-selector", NULL);
if (select->selector == NULL)
goto no_selector;
if (select->selector == NULL) {
/* post the missing selector message only once */
playbin->have_selector = FALSE;
gst_element_post_message (GST_ELEMENT_CAST (playbin),
gst_missing_element_message_new (GST_ELEMENT_CAST (playbin),
"input-selector"));
GST_ELEMENT_WARNING (playbin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"input-selector"), (NULL));
} else {
g_signal_connect (select->selector, "notify::active-pad",
G_CALLBACK (selector_active_pad_changed), playbin);
GST_DEBUG_OBJECT (playbin, "adding new selector %p", select->selector);
gst_bin_add (GST_BIN_CAST (playbin), select->selector);
gst_element_set_state (select->selector, GST_STATE_PAUSED);
}
}
/* save source pad */
if (select->srcpad == NULL) {
if (select->selector) {
/* save source pad of the selector */
select->srcpad = gst_element_get_static_pad (select->selector, "src");
} else {
/* no selector, use the pad as the source pad then */
select->srcpad = gst_object_ref (pad);
}
/* block the selector srcpad. It's possible that multiple decodebins start
* pushing data into the selectors before we have a chance to collect all
* streams and connect the sinks, resulting in not-linked errors. After we
@ -1760,6 +1782,7 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
}
/* get sinkpad for the new stream */
if (select->selector) {
if ((sinkpad = gst_element_get_request_pad (select->selector, "sink%d"))) {
GST_DEBUG_OBJECT (playbin, "got pad %s:%s from selector",
GST_DEBUG_PAD_NAME (sinkpad));
@ -1779,9 +1802,15 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
g_object_set_data (G_OBJECT (pad), "playbin2.sinkpad", sinkpad);
changed = TRUE;
}
GST_DEBUG_OBJECT (playbin, "linked pad %s:%s to selector %p",
GST_DEBUG_PAD_NAME (pad), select->selector);
}
} else {
/* no selector, don't configure anything, we'll link the new pad directly to
* the sink. */
changed = FALSE;
sinkpad = NULL;
}
GST_SOURCE_GROUP_UNLOCK (group);
if (changed) {
@ -1822,18 +1851,6 @@ unknown_type:
name, GST_DEBUG_PAD_NAME (pad));
goto done;
}
no_selector:
{
GST_SOURCE_GROUP_UNLOCK (group);
gst_element_post_message (GST_ELEMENT_CAST (playbin),
gst_missing_element_message_new (GST_ELEMENT_CAST (playbin),
"input-selector"));
GST_ELEMENT_ERROR (playbin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"input-selector"), (NULL));
goto done;
}
link_failed:
{
GST_ERROR_OBJECT (playbin,
@ -1937,7 +1954,7 @@ no_more_pads_cb (GstElement * decodebin, GstSourceGroup * group)
* created for it. If there is the media type, get a sinkpad from the sink
* and link it. We only do this if we have not yet requested the sinkpad
* before. */
if (select->selector && select->sinkpad == NULL) {
if (select->srcpad && select->sinkpad == NULL) {
GST_DEBUG_OBJECT (playbin, "requesting new sink pad %d", select->type);
select->sinkpad =
gst_play_sink_request_pad (playbin->playsink, select->type);
@ -1979,7 +1996,7 @@ no_more_pads_cb (GstElement * decodebin, GstSourceGroup * group)
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (select->selector) {
if (select->srcpad) {
GST_DEBUG_OBJECT (playbin, "unblocking %" GST_PTR_FORMAT,
select->srcpad);
gst_pad_set_blocked_async (select->srcpad, FALSE, selector_blocked,
@ -2004,7 +2021,8 @@ shutdown:
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (select->selector && select->sinkpad == NULL) {
if (select->srcpad) {
if (select->sinkpad == NULL) {
GST_DEBUG_OBJECT (playbin, "requesting new flushing sink pad");
select->sinkpad =
gst_play_sink_request_pad (playbin->playsink,
@ -2012,7 +2030,6 @@ shutdown:
res = gst_pad_link (select->srcpad, select->sinkpad);
GST_DEBUG_OBJECT (playbin, "linked flushing, result: %d", res);
}
if (select->srcpad) {
GST_DEBUG_OBJECT (playbin, "unblocking %" GST_PTR_FORMAT,
select->srcpad);
gst_pad_set_blocked_async (select->srcpad, FALSE, selector_blocked,
@ -2350,11 +2367,9 @@ deactivate_group (GstPlayBin * playbin, GstSourceGroup * group)
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (!select->selector)
continue;
GST_DEBUG_OBJECT (playbin, "unlinking selector %s", select->media);
if (select->srcpad) {
if (select->sinkpad) {
GST_LOG_OBJECT (playbin, "unlinking from sink");
gst_pad_unlink (select->srcpad, select->sinkpad);
@ -2364,14 +2379,16 @@ deactivate_group (GstPlayBin * playbin, GstSourceGroup * group)
gst_play_sink_release_pad (playbin->playsink, select->sinkpad);
select->sinkpad = NULL;
}
gst_object_unref (select->srcpad);
select->srcpad = NULL;
}
if (select->selector) {
gst_element_set_state (select->selector, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (playbin), select->selector);
select->selector = NULL;
}
}
/* we still have the decodebins added to the playbin2 but we can't remove them
* yet or change their state because this function might be called from the
* streaming threads, instead block the state so that state changes on the