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decodebin: set the decode pad target before setting elements to PAUSED

Browse source 
Otherwise caps and context queries will disappear into nothing and therefore
fail.  With autoplug-query now actually working, users (such as playbin) can
proxy these queries to the selected video sink and be able to select an
more appropriate configuration.

https://bugzilla.gnome.org/show_bug.cgi?id=731204
This commit is contained in:
Matthew Waters 2015-10-16 03:40:43 +11:00
parent df0d5aa4d5
commit d50b713f44
1 changed files with 23 additions and 66 deletions
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89
gst/playback/gstdecodebin2.c
View file

@ -1484,7 +1484,8 @@ decode_pad_set_target (GstDecodePad * dpad, GstPad * target)
* - get list of factories to autoplug.
* - continue autoplugging to one of the factories.
*/
static void
/* returns whether to expose the pad */
static gboolean
analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
GstCaps * caps, GstDecodeChain * chain)
{
@ -1504,12 +1505,12 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
&& src != ((GstDecodeElement *) chain->elements->data)->element
&& src != ((GstDecodeElement *) chain->elements->data)->capsfilter) {
GST_ERROR_OBJECT (dbin, "New pad from not the last element in this chain");
return;
return FALSE;
}
if (chain->endpad) {
GST_ERROR_OBJECT (dbin, "New pad in a chain that is already complete");
return;
return FALSE;
}
if (chain->demuxer) {
@ -1532,7 +1533,7 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
CHAIN_MUTEX_UNLOCK (oldchain);
if (!group) {
GST_WARNING_OBJECT (dbin, "No current group");
return;
return FALSE;
}
/* If this is not a dynamic pad demuxer, we're no-more-pads
@ -1786,15 +1787,15 @@ analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
gst_caps_unref (caps);
return;
return FALSE;
expose_pad:
{
GST_LOG_OBJECT (dbin, "Pad is final. autoplug-continue:%d", apcontinue);
expose_pad (dbin, src, dpad, pad, caps, chain);
GST_LOG_OBJECT (dbin, "Pad is final and should expose the pad. "
"autoplug-continue:%d", apcontinue);
gst_object_unref (dpad);
gst_caps_unref (caps);
return;
return TRUE;
}
discarded_type:
@ -1814,7 +1815,7 @@ discarded_type:
EXPOSE_UNLOCK (dbin);
do_async_done (dbin);
return;
return FALSE;
}
unknown_type:
@ -1848,7 +1849,7 @@ unknown_type:
}
do_async_done (dbin);
}
return;
return FALSE;
}
non_fixed:
{
@ -1887,7 +1888,7 @@ setup_caps_delay:
if (caps)
gst_caps_unref (caps);
return;
return FALSE;
}
}
@ -1984,39 +1985,6 @@ error_message_to_string (GstMessage * msg)
return full_message;
}
/* We consider elements as "simple demuxer" when they are a demuxer
* with one and only one ALWAYS source pad.
*/
static gboolean
is_simple_demuxer_factory (GstElementFactory * factory)
{
if (strstr (gst_element_factory_get_metadata (factory,
GST_ELEMENT_METADATA_KLASS), "Demuxer")) {
const GList *tmp;
gint num_alway_srcpads = 0;
for (tmp = gst_element_factory_get_static_pad_templates (factory);
tmp; tmp = tmp->next) {
GstStaticPadTemplate *template = tmp->data;
if (template->direction == GST_PAD_SRC) {
if (template->presence == GST_PAD_ALWAYS) {
if (num_alway_srcpads >= 0)
num_alway_srcpads++;
} else {
num_alway_srcpads = -1;
}
}
}
if (num_alway_srcpads == 1)
return TRUE;
}
return FALSE;
}
static GstPadProbeReturn
demuxer_source_pad_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer user_data)
@ -2122,7 +2090,8 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
GParamSpec *pspec;
gboolean subtitle;
GList *to_connect = NULL;
gboolean is_parser_converter = FALSE, is_simple_demuxer = FALSE;
gboolean is_parser_converter = FALSE;
gboolean to_expose = FALSE;
/* Set dpad target to pad again, it might've been unset
* below but we came back here because something failed
@ -2190,7 +2159,6 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
*/
is_parser_converter = strstr (gst_element_factory_get_metadata (factory,
GST_ELEMENT_METADATA_KLASS), "Parser") != NULL;
is_simple_demuxer = is_simple_demuxer_factory (factory);
if (is_parser_converter) {
gboolean skip = FALSE;
@ -2447,14 +2415,15 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
/* link this element further */
to_connect = connect_element (dbin, delem, chain);
if ((is_simple_demuxer || is_parser_converter) && to_connect) {
{
GList *l;
for (l = to_connect; l; l = g_list_next (l)) {
GstPad *opad = GST_PAD_CAST (l->data);
GstCaps *ocaps;
ocaps = get_pad_caps (opad);
analyze_new_pad (dbin, delem->element, opad, ocaps, chain);
to_expose = analyze_new_pad (dbin, delem->element, opad, ocaps, chain);
if (ocaps)
gst_caps_unref (ocaps);
@ -2573,22 +2542,8 @@ connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
SUBTITLE_UNLOCK (dbin);
}
if (to_connect) {
GList *l;
for (l = to_connect; l; l = g_list_next (l)) {
GstPad *opad = GST_PAD_CAST (l->data);
GstCaps *ocaps;
ocaps = get_pad_caps (opad);
analyze_new_pad (dbin, delem->element, opad, ocaps, chain);
if (ocaps)
gst_caps_unref (ocaps);
gst_object_unref (opad);
}
g_list_free (to_connect);
to_connect = NULL;
}
if (to_expose)
expose_pad (dbin, delem->element, dpad, pad, caps, chain);
res = TRUE;
break;
@ -2836,7 +2791,8 @@ type_found (GstElement * typefind, guint probability,
* be held (if called from a proxied setcaps), so grab it anyway */
GST_PAD_STREAM_LOCK (sink_pad);
decode_bin->decode_chain = gst_decode_chain_new (decode_bin, NULL, pad);
analyze_new_pad (decode_bin, typefind, pad, caps, decode_bin->decode_chain);
if (analyze_new_pad (decode_bin, typefind, pad, caps, decode_bin->decode_chain))
expose_pad (decode_bin, typefind, decode_bin->decode_chain->current_pad, pad, caps, decode_bin->decode_chain);
GST_PAD_STREAM_UNLOCK (sink_pad);
gst_object_unref (sink_pad);
@ -2889,7 +2845,8 @@ pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
GST_DEBUG_OBJECT (pad, "pad added, chain:%p", chain);
caps = get_pad_caps (pad);
analyze_new_pad (dbin, element, pad, caps, chain);
if (analyze_new_pad (dbin, element, pad, caps, chain))
expose_pad (dbin, element, chain->current_pad, pad, caps, chain);
if (caps)
gst_caps_unref (caps);