2 * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-subtitleoverlay
23 * #GstBin that auto-magically overlays a video stream with subtitles by
24 * autoplugging the required elements.
26 * It supports raw, timestamped text, different textual subtitle formats and
27 * DVD subpicture subtitles.
30 * <title>Examples</title>
32 * gst-launch -v filesrc location=test.mkv ! matroskademux name=demux ! "video/x-h264" ! queue2 ! decodebin2 ! subtitleoverlay name=overlay ! ffmpegcolorspace ! autovideosink demux. ! "video/x-dvd-subpicture" ! queue2 ! overlay.
33 * ]| This will play back the given Matroska file with h264 video and subpicture subtitles.
41 #include "gstsubtitleoverlay.h"
43 #include <gst/gstfilter.h>
44 #include <gst/pbutils/missing-plugins.h>
45 #include <gst/video/video.h>
48 GST_DEBUG_CATEGORY_STATIC (subtitle_overlay_debug);
49 #define GST_CAT_DEFAULT subtitle_overlay_debug
51 #define IS_SUBTITLE_CHAIN_IGNORE_ERROR(flow) \
52 G_UNLIKELY (flow == GST_FLOW_ERROR || flow == GST_FLOW_NOT_NEGOTIATED)
54 #define IS_VIDEO_CHAIN_IGNORE_ERROR(flow) \
55 G_UNLIKELY (flow == GST_FLOW_ERROR)
57 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
62 static GstStaticPadTemplate video_sinktemplate =
63 GST_STATIC_PAD_TEMPLATE ("video_sink",
68 static GstStaticPadTemplate subtitle_sinktemplate =
69 GST_STATIC_PAD_TEMPLATE ("subtitle_sink",
79 PROP_SUBTITLE_ENCODING
82 GST_BOILERPLATE (GstSubtitleOverlay, gst_subtitle_overlay, GstBin,
85 static void _pad_blocked_cb (GstPad * pad, gboolean blocked,
88 static GQuark _subtitle_overlay_event_marker_id = 0;
91 do_async_start (GstSubtitleOverlay * self)
93 if (!self->do_async) {
95 gst_message_new_async_start (GST_OBJECT_CAST (self), FALSE);
97 GST_DEBUG_OBJECT (self, "Posting async-start");
98 parent_class->handle_message (GST_BIN_CAST (self), msg);
99 self->do_async = TRUE;
104 do_async_done (GstSubtitleOverlay * self)
106 if (self->do_async) {
107 GstMessage *msg = gst_message_new_async_done (GST_OBJECT_CAST (self));
109 GST_DEBUG_OBJECT (self, "Posting async-done");
110 parent_class->handle_message (GST_BIN_CAST (self), msg);
111 self->do_async = FALSE;
116 gst_subtitle_overlay_finalize (GObject * object)
118 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (object);
121 g_mutex_free (self->lock);
125 if (self->factories_lock) {
126 g_mutex_free (self->factories_lock);
127 self->factories_lock = NULL;
131 gst_plugin_feature_list_free (self->factories);
132 self->factories = NULL;
133 gst_caps_replace (&self->factory_caps, NULL);
135 if (self->font_desc) {
136 g_free (self->font_desc);
137 self->font_desc = NULL;
140 if (self->encoding) {
141 g_free (self->encoding);
142 self->encoding = NULL;
145 G_OBJECT_CLASS (parent_class)->finalize (object);
149 _is_renderer (GstElementFactory * factory)
151 const gchar *klass, *name;
153 klass = gst_element_factory_get_klass (factory);
154 name = gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
156 if (strstr (klass, "Overlay/Subtitle") != NULL ||
157 strstr (klass, "Overlay/SubPicture") != NULL)
159 if (strcmp (name, "textoverlay") == 0)
165 _is_parser (GstElementFactory * factory)
169 klass = gst_element_factory_get_klass (factory);
171 if (strstr (klass, "Parser/Subtitle") != NULL)
176 static const gchar *_sub_pad_names[] = { "subpicture", "subpicture_sink",
178 "subtitle_sink", "subtitle"
182 _get_sub_caps (GstElementFactory * factory)
184 const GList *templates;
186 gboolean is_parser = _is_parser (factory);
188 templates = gst_element_factory_get_static_pad_templates (factory);
189 for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
190 GstStaticPadTemplate *templ = walk->data;
192 if (templ->direction == GST_PAD_SINK && templ->presence == GST_PAD_ALWAYS) {
193 gboolean found = FALSE;
200 for (i = 0; i < G_N_ELEMENTS (_sub_pad_names); i++) {
201 if (strcmp (templ->name_template, _sub_pad_names[i]) == 0) {
208 return gst_static_caps_get (&templ->static_caps);
215 _factory_filter (GstPluginFeature * feature, GstCaps ** subcaps)
217 GstElementFactory *factory;
220 const GList *templates;
222 gboolean is_renderer;
223 GstCaps *templ_caps = NULL;
224 gboolean have_video_sink = FALSE;
226 /* we only care about element factories */
227 if (!GST_IS_ELEMENT_FACTORY (feature))
230 factory = GST_ELEMENT_FACTORY_CAST (feature);
232 /* only select elements with autoplugging rank or textoverlay */
233 name = gst_plugin_feature_get_name (feature);
234 rank = gst_plugin_feature_get_rank (feature);
235 if (strcmp ("textoverlay", name) != 0 && rank < GST_RANK_MARGINAL)
238 /* Check if it's a renderer or a parser */
239 if (_is_renderer (factory)) {
241 } else if (_is_parser (factory)) {
247 /* Check if there's a video sink in case of a renderer */
249 templates = gst_element_factory_get_static_pad_templates (factory);
250 for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
251 GstStaticPadTemplate *templ = walk->data;
253 /* we only care about the always-sink templates */
254 if (templ->direction == GST_PAD_SINK && templ->presence == GST_PAD_ALWAYS) {
255 if (strcmp (templ->name_template, "video") == 0 ||
256 strcmp (templ->name_template, "video_sink") == 0) {
257 have_video_sink = TRUE;
262 templ_caps = _get_sub_caps (factory);
264 if (is_renderer && have_video_sink && templ_caps) {
267 GST_DEBUG ("Found renderer element %s (%s) with caps %" GST_PTR_FORMAT,
268 gst_element_factory_get_longname (factory),
269 gst_plugin_feature_get_name (feature), templ_caps);
270 tmp = gst_caps_union (*subcaps, templ_caps);
271 gst_caps_unref (templ_caps);
272 gst_caps_replace (subcaps, tmp);
273 gst_caps_unref (tmp);
275 } else if (!is_renderer && !have_video_sink && templ_caps) {
278 GST_DEBUG ("Found parser element %s (%s) with caps %" GST_PTR_FORMAT,
279 gst_element_factory_get_longname (factory),
280 gst_plugin_feature_get_name (feature), templ_caps);
281 tmp = gst_caps_union (*subcaps, templ_caps);
282 gst_caps_unref (templ_caps);
283 gst_caps_replace (subcaps, tmp);
284 gst_caps_unref (tmp);
288 gst_caps_unref (templ_caps);
293 /* Call with factories_lock! */
295 gst_subtitle_overlay_update_factory_list (GstSubtitleOverlay * self)
298 || self->factories_cookie !=
299 gst_default_registry_get_feature_list_cookie ()) {
303 subcaps = gst_caps_new_empty ();
305 factories = gst_default_registry_feature_filter (
306 (GstPluginFeatureFilter) _factory_filter, FALSE, &subcaps);
307 GST_DEBUG_OBJECT (self, "Created factory caps: %" GST_PTR_FORMAT, subcaps);
308 gst_caps_replace (&self->factory_caps, subcaps);
309 gst_caps_unref (subcaps);
311 gst_plugin_feature_list_free (self->factories);
312 self->factories = factories;
313 self->factories_cookie = gst_default_registry_get_feature_list_cookie ();
316 return (self->factories != NULL);
319 G_LOCK_DEFINE_STATIC (_factory_caps);
320 static GstCaps *_factory_caps = NULL;
321 static guint32 _factory_caps_cookie = 0;
324 gst_subtitle_overlay_create_factory_caps (void)
327 GstCaps *subcaps = NULL;
329 G_LOCK (_factory_caps);
331 || _factory_caps_cookie !=
332 gst_default_registry_get_feature_list_cookie ()) {
334 gst_caps_unref (_factory_caps);
335 _factory_caps = gst_caps_new_empty ();
337 factories = gst_default_registry_feature_filter (
338 (GstPluginFeatureFilter) _factory_filter, FALSE, &_factory_caps);
339 GST_DEBUG ("Created factory caps: %" GST_PTR_FORMAT, _factory_caps);
340 gst_plugin_feature_list_free (factories);
341 _factory_caps_cookie = gst_default_registry_get_feature_list_cookie ();
343 subcaps = gst_caps_ref (_factory_caps);
344 G_UNLOCK (_factory_caps);
350 _filter_factories_for_caps (GstElementFactory * factory, const GstCaps * caps)
352 GstCaps *fcaps = _get_sub_caps (factory);
353 gboolean ret = (fcaps) ? gst_caps_can_intersect (fcaps, caps) : FALSE;
356 gst_caps_unref (fcaps);
359 gst_object_ref (factory);
364 _sort_by_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
367 const gchar *rname1, *rname2;
369 diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
373 /* If the ranks are the same sort by name to get deterministic results */
374 rname1 = gst_plugin_feature_get_name (f1);
375 rname2 = gst_plugin_feature_get_name (f2);
377 diff = strcmp (rname1, rname2);
383 _get_sub_pad (GstElement * element)
388 for (i = 0; i < G_N_ELEMENTS (_sub_pad_names); i++) {
389 pad = gst_element_get_static_pad (element, _sub_pad_names[i]);
397 _get_video_pad (GstElement * element)
399 static const gchar *pad_names[] = { "video", "video_sink" };
403 for (i = 0; i < G_N_ELEMENTS (pad_names); i++) {
404 pad = gst_element_get_static_pad (element, pad_names[i]);
412 _create_element (GstSubtitleOverlay * self, GstElement ** element,
413 const gchar * factory_name, GstElementFactory * factory,
414 const gchar * element_name, gboolean mandatory)
418 g_assert (!factory || !factory_name);
421 elt = gst_element_factory_make (factory_name, element_name);
424 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
425 elt = gst_element_factory_create (factory, element_name);
428 if (G_UNLIKELY (!elt)) {
433 gst_missing_element_message_new (GST_ELEMENT_CAST (self),
435 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
438 GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
439 ("no '%s' plugin found", factory_name));
441 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN, (NULL),
442 ("no '%s' plugin found", factory_name));
445 GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
446 ("can't instantiate '%s'", factory_name));
448 GST_ELEMENT_WARNING (self, CORE, FAILED, (NULL),
449 ("can't instantiate '%s'", factory_name));
456 if (G_UNLIKELY (gst_element_set_state (elt,
457 GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS)) {
458 gst_object_unref (elt);
460 GST_ELEMENT_ERROR (self, CORE, STATE_CHANGE, (NULL),
461 ("failed to set '%s' to READY", factory_name));
463 GST_WARNING_OBJECT (self, "Failed to set '%s' to READY", factory_name);
468 if (G_UNLIKELY (!gst_bin_add (GST_BIN_CAST (self), gst_object_ref (elt)))) {
469 gst_element_set_state (elt, GST_STATE_NULL);
470 gst_object_unref (elt);
472 GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
473 ("failed to add '%s' to subtitleoverlay", factory_name));
475 GST_WARNING_OBJECT (self, "Failed to add '%s' to subtitleoverlay",
481 gst_element_sync_state_with_parent (elt);
487 _remove_element (GstSubtitleOverlay * self, GstElement ** element)
490 gst_bin_remove (GST_BIN_CAST (self), *element);
491 gst_element_set_state (*element, GST_STATE_NULL);
492 gst_object_unref (*element);
498 _generate_update_newsegment_event (GstSegment * segment, GstEvent ** event1,
506 event = gst_event_new_new_segment_full (FALSE, segment->rate,
507 segment->applied_rate, segment->format, 0, segment->accum, 0);
508 gst_structure_id_set (event->structure, _subtitle_overlay_event_marker_id,
509 G_TYPE_BOOLEAN, TRUE, NULL);
512 event = gst_event_new_new_segment_full (FALSE, segment->rate,
513 segment->applied_rate, segment->format,
514 segment->start, segment->stop, segment->time);
515 gst_structure_id_set (event->structure, _subtitle_overlay_event_marker_id,
516 G_TYPE_BOOLEAN, TRUE, NULL);
521 _setup_passthrough (GstSubtitleOverlay * self)
524 GstElement *identity;
526 GST_DEBUG_OBJECT (self, "Doing video passthrough");
528 if (self->passthrough_identity) {
529 GST_DEBUG_OBJECT (self, "Already in passthrough mode");
533 /* Unlink & destroy everything */
534 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
535 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
536 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad), NULL);
537 self->silent_property = NULL;
538 _remove_element (self, &self->post_colorspace);
539 _remove_element (self, &self->overlay);
540 _remove_element (self, &self->parser);
541 _remove_element (self, &self->renderer);
542 _remove_element (self, &self->pre_colorspace);
543 _remove_element (self, &self->passthrough_identity);
545 if (G_UNLIKELY (!_create_element (self, &self->passthrough_identity,
546 "identity", NULL, "passthrough-identity", TRUE))) {
550 identity = self->passthrough_identity;
551 g_object_set (G_OBJECT (identity), "silent", TRUE, "signal-handoffs", FALSE,
554 /* Set src ghostpad target */
555 src = gst_element_get_static_pad (self->passthrough_identity, "src");
556 if (G_UNLIKELY (!src)) {
557 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
558 ("Failed to get srcpad from identity"));
562 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
564 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
565 ("Failed to set srcpad target"));
566 gst_object_unref (src);
569 gst_object_unref (src);
571 sink = gst_element_get_static_pad (self->passthrough_identity, "sink");
572 if (G_UNLIKELY (!sink)) {
573 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
574 ("Failed to get sinkpad from identity"));
578 /* Send segment to the identity. This is dropped because identity
579 * is not linked downstream yet */
580 if (self->video_segment.format != GST_FORMAT_UNDEFINED) {
581 GstEvent *event1, *event2;
583 _generate_update_newsegment_event (&self->video_segment, &event1, &event2);
584 GST_DEBUG_OBJECT (self,
585 "Pushing video accumulate newsegment event: %" GST_PTR_FORMAT,
587 GST_DEBUG_OBJECT (self,
588 "Pushing video update newsegment event: %" GST_PTR_FORMAT,
590 gst_pad_send_event (sink, event1);
591 gst_pad_send_event (sink, event2);
594 /* Link sink ghostpads to identity */
595 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
596 (self->video_sinkpad), sink))) {
597 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
598 ("Failed to set video sinkpad target"));
599 gst_object_unref (sink);
602 gst_object_unref (sink);
604 GST_DEBUG_OBJECT (self, "Video passthrough setup successfully");
608 gst_pad_set_blocked_async_full (self->video_block_pad, FALSE,
609 _pad_blocked_cb, gst_object_ref (self),
610 (GDestroyNotify) gst_object_unref);
612 if (self->subtitle_sink_blocked)
613 gst_pad_set_blocked_async_full (self->subtitle_block_pad, FALSE,
614 _pad_blocked_cb, gst_object_ref (self),
615 (GDestroyNotify) gst_object_unref);
620 /* Must be called with subtitleoverlay lock! */
622 gst_subtitle_overlay_set_fps (GstSubtitleOverlay * self)
624 GObjectClass *gobject_class;
627 if (!self->parser || self->fps_d == 0)
630 gobject_class = G_OBJECT_GET_CLASS (self->parser);
631 pspec = g_object_class_find_property (gobject_class, "video-fps");
632 if (!pspec || pspec->value_type != GST_TYPE_FRACTION)
635 GST_DEBUG_OBJECT (self, "Updating video-fps property in parser");
636 g_object_set (self->parser, "video-fps", self->fps_n, self->fps_d, NULL);
640 _get_silent_property (GstElement * element, gboolean * invert)
649 GObjectClass *gobject_class;
653 gobject_class = G_OBJECT_GET_CLASS (element);
655 for (i = 0; i < G_N_ELEMENTS (properties); i++) {
656 pspec = g_object_class_find_property (gobject_class, properties[i].name);
657 if (pspec && pspec->value_type == G_TYPE_BOOLEAN) {
658 *invert = properties[i].invert;
659 return properties[i].name;
666 _has_subtitle_encoding_property (GstElement * element)
671 g_object_class_find_property (G_OBJECT_GET_CLASS (element),
672 "subtitle-encoding");
673 return (pspec && pspec->value_type == G_TYPE_STRING);
677 _has_font_desc_property (GstElement * element)
682 g_object_class_find_property (G_OBJECT_GET_CLASS (element), "font-desc");
683 return (pspec && pspec->value_type == G_TYPE_STRING);
687 _pad_blocked_cb (GstPad * pad, gboolean blocked, gpointer user_data)
689 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (user_data);
691 GList *l, *factories = NULL;
693 GST_DEBUG_OBJECT (pad, "Pad blocked: %d", blocked);
695 GST_SUBTITLE_OVERLAY_LOCK (self);
696 if (pad == self->video_block_pad)
697 self->video_sink_blocked = blocked;
698 else if (pad == self->subtitle_block_pad)
699 self->subtitle_sink_blocked = blocked;
702 GST_SUBTITLE_OVERLAY_UNLOCK (self);
706 /* Now either both or the video sink are blocked */
708 /* Get current subtitle caps */
709 subcaps = self->subcaps;
713 peer = gst_pad_get_peer (self->subtitle_sinkpad);
715 subcaps = gst_pad_get_negotiated_caps (peer);
717 subcaps = gst_pad_get_caps_reffed (peer);
718 if (!gst_caps_is_fixed (subcaps)) {
719 gst_caps_unref (subcaps);
723 gst_object_unref (peer);
725 gst_caps_replace (&self->subcaps, subcaps);
727 gst_caps_unref (subcaps);
729 GST_DEBUG_OBJECT (self, "Current subtitle caps: %" GST_PTR_FORMAT, subcaps);
731 /* If there are no subcaps but the subtitle sink is blocked upstream
732 * must behave wrong as there are no fixed caps set for the first
733 * buffer or in-order event */
734 if (G_UNLIKELY (!subcaps && self->subtitle_sink_blocked)) {
735 GST_ELEMENT_WARNING (self, CORE, NEGOTIATION, (NULL),
736 ("Subtitle sink is blocked but we have no subtitle caps"));
740 if (self->subtitle_error || (self->silent && !self->silent_property)) {
741 _setup_passthrough (self);
742 do_async_done (self);
746 /* Now do something with the caps */
747 if (subcaps && !self->subtitle_flush) {
749 gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad));
751 if (target && gst_pad_accept_caps (target, subcaps)) {
752 GST_DEBUG_OBJECT (pad, "Target accepts caps");
754 gst_object_unref (target);
757 gst_pad_set_blocked_async_full (self->video_block_pad, FALSE,
758 _pad_blocked_cb, gst_object_ref (self),
759 (GDestroyNotify) gst_object_unref);
761 if (self->subtitle_sink_blocked)
762 gst_pad_set_blocked_async_full (self->subtitle_block_pad, FALSE,
763 _pad_blocked_cb, gst_object_ref (self),
764 (GDestroyNotify) gst_object_unref);
767 gst_object_unref (target);
771 if (self->subtitle_sink_blocked && !self->video_sink_blocked) {
772 GST_DEBUG_OBJECT (self, "Subtitle sink blocked but video not blocked");
773 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
774 _pad_blocked_cb, gst_object_ref (self),
775 (GDestroyNotify) gst_object_unref);
779 self->subtitle_flush = FALSE;
781 /* Find our factories */
782 g_mutex_lock (self->factories_lock);
783 gst_subtitle_overlay_update_factory_list (self);
785 factories = gst_filter_run (self->factories,
786 (GstFilterFunc) _filter_factories_for_caps, FALSE, subcaps);
790 msg = gst_missing_decoder_message_new (GST_ELEMENT_CAST (self), subcaps);
791 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
792 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN, (NULL),
793 ("no suitable subtitle plugin found"));
795 self->subtitle_error = TRUE;
798 g_mutex_unlock (self->factories_lock);
801 _setup_passthrough (self);
802 do_async_done (self);
806 /* Now the interesting parts are done: subtitle overlaying! */
808 /* Sort the factories by rank */
809 factories = g_list_sort (factories, (GCompareFunc) _sort_by_ranks);
811 for (l = factories; l; l = l->next) {
812 GstElementFactory *factory = l->data;
813 gboolean is_renderer = _is_renderer (factory);
817 /* Unlink & destroy everything */
819 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
820 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
821 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad),
823 self->silent_property = NULL;
824 _remove_element (self, &self->post_colorspace);
825 _remove_element (self, &self->overlay);
826 _remove_element (self, &self->parser);
827 _remove_element (self, &self->renderer);
828 _remove_element (self, &self->pre_colorspace);
829 _remove_element (self, &self->passthrough_identity);
831 GST_DEBUG_OBJECT (self, "Trying factory '%s'",
832 GST_STR_NULL (gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST
835 if (G_UNLIKELY ((is_renderer
836 && !_create_element (self, &self->renderer, NULL, factory,
837 "renderer", FALSE)) || (!is_renderer
838 && !_create_element (self, &self->parser, NULL, factory,
842 element = is_renderer ? self->renderer : self->parser;
844 /* If this is a parser, create textoverlay and link video and the parser to it
845 * Else link the renderer to the output colorspace */
850 /* Try to get the latest video framerate */
851 video_peer = gst_pad_get_peer (self->video_sinkpad);
856 video_caps = gst_pad_get_negotiated_caps (video_peer);
858 video_caps = gst_pad_get_caps_reffed (video_peer);
859 if (!gst_caps_is_fixed (video_caps)) {
860 gst_caps_unref (video_caps);
866 && gst_video_parse_caps_framerate (video_caps, &fps_n, &fps_d)) {
867 if (self->fps_n != fps_n || self->fps_d != fps_d) {
868 GST_DEBUG_OBJECT (self, "New video fps: %d/%d", fps_n, fps_d);
875 gst_caps_unref (video_caps);
876 gst_object_unref (video_peer);
879 if (_has_subtitle_encoding_property (self->parser))
880 g_object_set (self->parser, "subtitle-encoding", self->encoding, NULL);
882 /* Try to set video fps on the parser */
883 gst_subtitle_overlay_set_fps (self);
885 /* First link everything internally */
886 if (G_UNLIKELY (!_create_element (self, &self->overlay, "textoverlay",
887 NULL, "overlay", FALSE))) {
890 overlay = self->overlay;
891 self->silent_property = "silent";
892 self->silent_property_invert = FALSE;
894 /* Set some properties */
895 g_object_set (G_OBJECT (overlay),
896 "halign", "center", "valign", "bottom", "wait-text", FALSE, NULL);
898 g_object_set (G_OBJECT (overlay), "font-desc", self->font_desc, NULL);
900 src = gst_element_get_static_pad (element, "src");
901 if (G_UNLIKELY (!src)) {
905 sink = gst_element_get_static_pad (overlay, "text_sink");
906 if (G_UNLIKELY (!sink)) {
907 GST_WARNING_OBJECT (self, "Can't get text sink from textoverlay");
908 gst_object_unref (src);
912 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
913 GST_WARNING_OBJECT (self, "Can't link parser to textoverlay");
914 gst_object_unref (sink);
915 gst_object_unref (src);
918 gst_object_unref (sink);
919 gst_object_unref (src);
921 if (G_UNLIKELY (!_create_element (self, &self->post_colorspace,
922 "ffmpegcolorspace", NULL, "post-colorspace", FALSE))) {
926 src = gst_element_get_static_pad (overlay, "src");
927 if (G_UNLIKELY (!src)) {
928 GST_WARNING_OBJECT (self, "Can't get src pad from overlay");
932 sink = gst_element_get_static_pad (self->post_colorspace, "sink");
933 if (G_UNLIKELY (!sink)) {
934 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
935 gst_object_unref (src);
939 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
940 GST_WARNING_OBJECT (self, "Can't link overlay with ffmpegcolorspace");
941 gst_object_unref (src);
942 gst_object_unref (sink);
945 gst_object_unref (src);
946 gst_object_unref (sink);
948 if (G_UNLIKELY (!_create_element (self, &self->pre_colorspace,
949 "ffmpegcolorspace", NULL, "pre-colorspace", FALSE))) {
953 sink = gst_element_get_static_pad (overlay, "video_sink");
954 if (G_UNLIKELY (!sink)) {
955 GST_WARNING_OBJECT (self, "Can't get video sink from textoverlay");
959 src = gst_element_get_static_pad (self->pre_colorspace, "src");
960 if (G_UNLIKELY (!src)) {
961 GST_WARNING_OBJECT (self, "Can't get srcpad from ffmpegcolorspace");
962 gst_object_unref (sink);
966 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
967 GST_WARNING_OBJECT (self, "Can't link ffmpegcolorspace to textoverlay");
968 gst_object_unref (src);
969 gst_object_unref (sink);
972 gst_object_unref (src);
973 gst_object_unref (sink);
975 /* Set src ghostpad target */
976 src = gst_element_get_static_pad (self->post_colorspace, "src");
977 if (G_UNLIKELY (!src)) {
978 GST_WARNING_OBJECT (self, "Can't get src pad from ffmpegcolorspace");
982 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
983 (self->srcpad), src))) {
984 GST_WARNING_OBJECT (self, "Can't set srcpad target");
985 gst_object_unref (src);
988 gst_object_unref (src);
990 /* Send segments to the parser/overlay if necessary. These are not sent
991 * outside this element because of the proxy pad event function */
992 if (self->video_segment.format != GST_FORMAT_UNDEFINED) {
993 GstEvent *event1, *event2;
995 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
996 if (G_UNLIKELY (!sink)) {
997 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
1001 _generate_update_newsegment_event (&self->video_segment, &event1,
1003 GST_DEBUG_OBJECT (self,
1004 "Pushing video accumulate newsegment event: %" GST_PTR_FORMAT,
1006 GST_DEBUG_OBJECT (self,
1007 "Pushing video update newsegment event: %" GST_PTR_FORMAT,
1009 gst_pad_send_event (sink, event1);
1010 gst_pad_send_event (sink, event2);
1012 gst_object_unref (sink);
1015 if (self->subtitle_segment.format != GST_FORMAT_UNDEFINED) {
1016 GstEvent *event1, *event2;
1018 sink = gst_element_get_static_pad (element, "sink");
1019 if (G_UNLIKELY (!sink)) {
1020 GST_WARNING_OBJECT (self, "Failed to get subpad");
1024 _generate_update_newsegment_event (&self->subtitle_segment, &event1,
1026 GST_DEBUG_OBJECT (self,
1027 "Pushing subtitle accumulate newsegment event: %" GST_PTR_FORMAT,
1029 GST_DEBUG_OBJECT (self,
1030 "Pushing subtitle update newsegment event: %" GST_PTR_FORMAT,
1032 gst_pad_send_event (sink, event1);
1033 gst_pad_send_event (sink, event2);
1035 gst_object_unref (sink);
1038 /* Set the sink ghostpad targets */
1039 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
1040 if (G_UNLIKELY (!sink)) {
1041 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
1045 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1046 (self->video_sinkpad), sink))) {
1047 GST_WARNING_OBJECT (self, "Can't set video sinkpad target");
1048 gst_object_unref (sink);
1051 gst_object_unref (sink);
1053 /* Link subtitle identity to subtitle pad of our element */
1054 sink = gst_element_get_static_pad (element, "sink");
1055 if (G_UNLIKELY (!sink)) {
1056 GST_WARNING_OBJECT (self, "Failed to get subpad");
1060 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1061 (self->subtitle_sinkpad), sink))) {
1062 GST_WARNING_OBJECT (self, "Failed to set subtitle sink target");
1063 gst_object_unref (sink);
1066 gst_object_unref (sink);
1069 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
1071 if (strcmp (name, "textoverlay") == 0) {
1072 /* Set some textoverlay specific properties */
1073 g_object_set (G_OBJECT (element),
1074 "halign", "center", "valign", "bottom", "wait-text", FALSE, NULL);
1075 if (self->font_desc)
1076 g_object_set (G_OBJECT (element), "font-desc", self->font_desc, NULL);
1077 self->silent_property = "silent";
1078 self->silent_property_invert = FALSE;
1080 self->silent_property =
1081 _get_silent_property (element, &self->silent_property_invert);
1082 if (_has_subtitle_encoding_property (self->renderer))
1083 g_object_set (self->renderer, "subtitle-encoding", self->encoding,
1085 if (_has_font_desc_property (self->renderer))
1086 g_object_set (self->renderer, "font-desc", self->font_desc, NULL);
1089 /* First link everything internally */
1090 if (G_UNLIKELY (!_create_element (self, &self->post_colorspace,
1091 "ffmpegcolorspace", NULL, "post-colorspace", FALSE))) {
1095 src = gst_element_get_static_pad (element, "src");
1096 if (G_UNLIKELY (!src)) {
1097 GST_WARNING_OBJECT (self, "Can't get src pad from renderer");
1101 sink = gst_element_get_static_pad (self->post_colorspace, "sink");
1102 if (G_UNLIKELY (!sink)) {
1103 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
1104 gst_object_unref (src);
1108 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
1109 GST_WARNING_OBJECT (self, "Can't link renderer with ffmpegcolorspace");
1110 gst_object_unref (src);
1111 gst_object_unref (sink);
1114 gst_object_unref (src);
1115 gst_object_unref (sink);
1117 if (G_UNLIKELY (!_create_element (self, &self->pre_colorspace,
1118 "ffmpegcolorspace", NULL, "pre-colorspace", FALSE))) {
1122 sink = _get_video_pad (element);
1123 if (G_UNLIKELY (!sink)) {
1124 GST_WARNING_OBJECT (self, "Can't get video sink from renderer");
1128 src = gst_element_get_static_pad (self->pre_colorspace, "src");
1129 if (G_UNLIKELY (!src)) {
1130 GST_WARNING_OBJECT (self, "Can't get srcpad from ffmpegcolorspace");
1131 gst_object_unref (sink);
1135 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
1136 GST_WARNING_OBJECT (self, "Can't link ffmpegcolorspace to renderer");
1137 gst_object_unref (src);
1138 gst_object_unref (sink);
1141 gst_object_unref (src);
1142 gst_object_unref (sink);
1144 /* Set src ghostpad target */
1145 src = gst_element_get_static_pad (self->post_colorspace, "src");
1146 if (G_UNLIKELY (!src)) {
1147 GST_WARNING_OBJECT (self, "Can't get src pad from ffmpegcolorspace");
1151 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1152 (self->srcpad), src))) {
1153 GST_WARNING_OBJECT (self, "Can't set srcpad target");
1154 gst_object_unref (src);
1157 gst_object_unref (src);
1159 /* Send segments to the renderer if necessary. These are not sent
1160 * outside this element because of the proxy pad event handler */
1161 if (self->video_segment.format != GST_FORMAT_UNDEFINED) {
1162 GstEvent *event1, *event2;
1164 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
1165 if (G_UNLIKELY (!sink)) {
1166 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
1170 _generate_update_newsegment_event (&self->video_segment, &event1,
1172 GST_DEBUG_OBJECT (self,
1173 "Pushing video accumulate newsegment event: %" GST_PTR_FORMAT,
1175 GST_DEBUG_OBJECT (self,
1176 "Pushing video update newsegment event: %" GST_PTR_FORMAT,
1178 gst_pad_send_event (sink, event1);
1179 gst_pad_send_event (sink, event2);
1180 gst_object_unref (sink);
1183 if (self->subtitle_segment.format != GST_FORMAT_UNDEFINED) {
1184 GstEvent *event1, *event2;
1186 sink = _get_sub_pad (element);
1187 if (G_UNLIKELY (!sink)) {
1188 GST_WARNING_OBJECT (self, "Failed to get subpad");
1192 _generate_update_newsegment_event (&self->subtitle_segment, &event1,
1194 GST_DEBUG_OBJECT (self,
1195 "Pushing subtitle accumulate newsegment event: %" GST_PTR_FORMAT,
1197 GST_DEBUG_OBJECT (self,
1198 "Pushing subtitle update newsegment event: %" GST_PTR_FORMAT,
1200 gst_pad_send_event (sink, event1);
1201 gst_pad_send_event (sink, event2);
1202 gst_object_unref (sink);
1205 /* Set the sink ghostpad targets */
1206 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
1207 if (G_UNLIKELY (!sink)) {
1208 GST_WARNING_OBJECT (self, "Can't get sink pad from ffmpegcolorspace");
1212 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1213 (self->video_sinkpad), sink))) {
1214 GST_WARNING_OBJECT (self, "Can't set video sinkpad target");
1215 gst_object_unref (sink);
1218 gst_object_unref (sink);
1220 sink = _get_sub_pad (element);
1221 if (G_UNLIKELY (!sink)) {
1222 GST_WARNING_OBJECT (self, "Failed to get subpad");
1226 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1227 (self->subtitle_sinkpad), sink))) {
1228 GST_WARNING_OBJECT (self, "Failed to set subtitle sink target");
1229 gst_object_unref (sink);
1232 gst_object_unref (sink);
1238 if (G_UNLIKELY (l == NULL)) {
1239 GST_ELEMENT_WARNING (self, CORE, FAILED, (NULL),
1240 ("Failed to find any usable factories"));
1241 self->subtitle_error = TRUE;
1242 _setup_passthrough (self);
1243 do_async_done (self);
1245 GST_DEBUG_OBJECT (self, "Everything worked, unblocking pads");
1246 gst_pad_set_blocked_async_full (self->video_block_pad, FALSE,
1247 _pad_blocked_cb, gst_object_ref (self),
1248 (GDestroyNotify) gst_object_unref);
1249 gst_pad_set_blocked_async_full (self->subtitle_block_pad, FALSE,
1250 _pad_blocked_cb, gst_object_ref (self),
1251 (GDestroyNotify) gst_object_unref);
1252 do_async_done (self);
1257 gst_plugin_feature_list_free (factories);
1258 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1261 static GstStateChangeReturn
1262 gst_subtitle_overlay_change_state (GstElement * element,
1263 GstStateChange transition)
1265 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (element);
1266 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1268 switch (transition) {
1269 case GST_STATE_CHANGE_NULL_TO_READY:
1270 GST_DEBUG_OBJECT (self, "State change NULL->READY");
1271 g_mutex_lock (self->factories_lock);
1272 if (G_UNLIKELY (!gst_subtitle_overlay_update_factory_list (self))) {
1273 g_mutex_unlock (self->factories_lock);
1274 return GST_STATE_CHANGE_FAILURE;
1276 g_mutex_unlock (self->factories_lock);
1278 GST_SUBTITLE_OVERLAY_LOCK (self);
1279 /* Set the internal pads to blocking */
1280 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1281 _pad_blocked_cb, gst_object_ref (self),
1282 (GDestroyNotify) gst_object_unref);
1283 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1284 _pad_blocked_cb, gst_object_ref (self),
1285 (GDestroyNotify) gst_object_unref);
1286 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1288 case GST_STATE_CHANGE_READY_TO_PAUSED:
1289 GST_DEBUG_OBJECT (self, "State change READY->PAUSED");
1290 gst_segment_init (&self->video_segment, GST_FORMAT_UNDEFINED);
1291 gst_segment_init (&self->subtitle_segment, GST_FORMAT_UNDEFINED);
1293 self->fps_n = self->fps_d = 0;
1295 self->subtitle_flush = FALSE;
1296 self->subtitle_error = FALSE;
1298 self->downstream_chain_error = FALSE;
1300 do_async_start (self);
1301 ret = GST_STATE_CHANGE_ASYNC;
1304 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1305 GST_DEBUG_OBJECT (self, "State change PAUSED->PLAYING");
1311 GstStateChangeReturn bret;
1313 bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1314 GST_DEBUG_OBJECT (self, "Base class state changed returned: %d", bret);
1315 if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
1317 else if (bret == GST_STATE_CHANGE_ASYNC)
1319 else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
1320 do_async_done (self);
1325 switch (transition) {
1326 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1327 GST_DEBUG_OBJECT (self, "State change PLAYING->PAUSED");
1329 case GST_STATE_CHANGE_PAUSED_TO_READY:
1330 GST_DEBUG_OBJECT (self, "State change PAUSED->READY");
1331 do_async_done (self);
1334 case GST_STATE_CHANGE_READY_TO_NULL:{
1337 GST_DEBUG_OBJECT (self, "State change READY->NULL");
1339 GST_SUBTITLE_OVERLAY_LOCK (self);
1340 gst_caps_replace (&self->subcaps, NULL);
1342 /* Unlink ghost pads */
1343 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
1344 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
1345 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad),
1349 if (self->video_block_pad) {
1350 pad = self->video_block_pad;
1351 gst_pad_set_blocked_async_full (pad, FALSE, _pad_blocked_cb,
1352 gst_object_ref (self), (GDestroyNotify) gst_object_unref);
1355 if (self->subtitle_block_pad) {
1356 pad = self->subtitle_block_pad;
1357 gst_pad_set_blocked_async_full (pad, FALSE, _pad_blocked_cb,
1358 gst_object_ref (self), (GDestroyNotify) gst_object_unref);
1361 /* Remove elements */
1362 self->silent_property = NULL;
1363 _remove_element (self, &self->post_colorspace);
1364 _remove_element (self, &self->overlay);
1365 _remove_element (self, &self->parser);
1366 _remove_element (self, &self->renderer);
1367 _remove_element (self, &self->pre_colorspace);
1368 _remove_element (self, &self->passthrough_identity);
1369 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1381 gst_subtitle_overlay_handle_message (GstBin * bin, GstMessage * message)
1383 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (bin);
1385 if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ERROR) {
1386 GstObject *src = GST_MESSAGE_SRC (message);
1388 /* Convert error messages from the subtitle pipeline to
1389 * warnings and switch to passthrough mode */
1392 && gst_object_has_ancestor (src,
1393 GST_OBJECT_CAST (self->overlay))) || (self->parser
1394 && gst_object_has_ancestor (src,
1395 GST_OBJECT_CAST (self->parser))) || (self->renderer
1396 && gst_object_has_ancestor (src,
1397 GST_OBJECT_CAST (self->renderer))))) {
1399 gchar *debug = NULL;
1402 gst_message_parse_error (message, &err, &debug);
1403 GST_DEBUG_OBJECT (self,
1404 "Got error message from subtitle element %s: %s (%s)",
1405 GST_MESSAGE_SRC_NAME (message), GST_STR_NULL (err->message),
1406 GST_STR_NULL (debug));
1408 wmsg = gst_message_new_warning (src, err, debug);
1409 gst_message_unref (message);
1414 GST_SUBTITLE_OVERLAY_LOCK (self);
1415 self->subtitle_error = TRUE;
1417 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1418 _pad_blocked_cb, gst_object_ref (self),
1419 (GDestroyNotify) gst_object_unref);
1421 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1422 _pad_blocked_cb, gst_object_ref (self),
1423 (GDestroyNotify) gst_object_unref);
1424 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1428 GST_BIN_CLASS (parent_class)->handle_message (bin, message);
1432 gst_subtitle_overlay_get_property (GObject * object, guint prop_id,
1433 GValue * value, GParamSpec * pspec)
1435 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (object);
1439 g_value_set_boolean (value, self->silent);
1441 case PROP_FONT_DESC:
1442 GST_SUBTITLE_OVERLAY_LOCK (self);
1443 g_value_set_string (value, self->font_desc);
1444 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1446 case PROP_SUBTITLE_ENCODING:
1447 GST_SUBTITLE_OVERLAY_LOCK (self);
1448 g_value_set_string (value, self->encoding);
1449 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1452 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1458 gst_subtitle_overlay_set_property (GObject * object, guint prop_id,
1459 const GValue * value, GParamSpec * pspec)
1461 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (object);
1465 GST_SUBTITLE_OVERLAY_LOCK (self);
1466 self->silent = g_value_get_boolean (value);
1467 if (self->silent_property) {
1468 gboolean silent = self->silent;
1470 if (self->silent_property_invert)
1474 g_object_set (self->overlay, self->silent_property, silent, NULL);
1475 else if (self->renderer)
1476 g_object_set (self->renderer, self->silent_property, silent, NULL);
1478 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1479 _pad_blocked_cb, gst_object_ref (self),
1480 (GDestroyNotify) gst_object_unref);
1482 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1483 _pad_blocked_cb, gst_object_ref (self),
1484 (GDestroyNotify) gst_object_unref);
1486 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1488 case PROP_FONT_DESC:
1489 GST_SUBTITLE_OVERLAY_LOCK (self);
1490 g_free (self->font_desc);
1491 self->font_desc = g_value_dup_string (value);
1493 g_object_set (self->overlay, "font-desc", self->font_desc, NULL);
1494 else if (self->renderer && _has_font_desc_property (self->renderer))
1495 g_object_set (self->renderer, "font-desc", self->font_desc, NULL);
1496 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1498 case PROP_SUBTITLE_ENCODING:
1499 GST_SUBTITLE_OVERLAY_LOCK (self);
1500 g_free (self->encoding);
1501 self->encoding = g_value_dup_string (value);
1502 if (self->renderer && _has_subtitle_encoding_property (self->renderer))
1503 g_object_set (self->renderer, "subtitle-encoding", self->encoding,
1505 if (self->parser && _has_subtitle_encoding_property (self->parser))
1506 g_object_set (self->parser, "subtitle-encoding", self->encoding, NULL);
1507 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1510 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1516 gst_subtitle_overlay_base_init (gpointer g_class)
1518 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
1520 gst_element_class_add_pad_template (gstelement_class,
1521 gst_static_pad_template_get (&srctemplate));
1523 gst_element_class_add_pad_template (gstelement_class,
1524 gst_static_pad_template_get (&video_sinktemplate));
1525 gst_element_class_add_pad_template (gstelement_class,
1526 gst_static_pad_template_get (&subtitle_sinktemplate));
1528 gst_element_class_set_details_simple (gstelement_class, "Subtitle Overlay",
1529 "Video/Overlay/Subtitle",
1530 "Overlays a video stream with subtitles",
1531 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
1535 gst_subtitle_overlay_class_init (GstSubtitleOverlayClass * klass)
1537 GObjectClass *gobject_class = (GObjectClass *) klass;
1538 GstElementClass *element_class = (GstElementClass *) klass;
1539 GstBinClass *bin_class = (GstBinClass *) klass;
1541 gobject_class->finalize = gst_subtitle_overlay_finalize;
1542 gobject_class->set_property = gst_subtitle_overlay_set_property;
1543 gobject_class->get_property = gst_subtitle_overlay_get_property;
1545 g_object_class_install_property (gobject_class, PROP_SILENT,
1546 g_param_spec_boolean ("silent",
1548 "Whether to show subtitles", FALSE,
1549 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1551 g_object_class_install_property (gobject_class, PROP_FONT_DESC,
1552 g_param_spec_string ("font-desc",
1553 "Subtitle font description",
1554 "Pango font description of font "
1555 "to be used for subtitle rendering", NULL,
1556 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1558 g_object_class_install_property (gobject_class, PROP_SUBTITLE_ENCODING,
1559 g_param_spec_string ("subtitle-encoding", "subtitle encoding",
1560 "Encoding to assume if input subtitles are not in UTF-8 encoding. "
1561 "If not set, the GST_SUBTITLE_ENCODING environment variable will "
1562 "be checked for an encoding to use. If that is not set either, "
1563 "ISO-8859-15 will be assumed.", NULL,
1564 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1566 element_class->change_state =
1567 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_change_state);
1569 bin_class->handle_message =
1570 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_handle_message);
1573 static GstFlowReturn
1574 gst_subtitle_overlay_src_proxy_chain (GstPad * proxypad, GstBuffer * buffer)
1577 GstSubtitleOverlay *self;
1580 ghostpad = GST_PAD_CAST (gst_pad_get_parent (proxypad));
1581 if (G_UNLIKELY (!ghostpad)) {
1582 gst_buffer_unref (buffer);
1583 return GST_FLOW_ERROR;
1585 self = GST_SUBTITLE_OVERLAY_CAST (gst_pad_get_parent (ghostpad));
1586 if (G_UNLIKELY (!self || self->srcpad != ghostpad)) {
1587 gst_buffer_unref (buffer);
1588 gst_object_unref (ghostpad);
1589 return GST_FLOW_ERROR;
1592 ret = self->src_proxy_chain (proxypad, buffer);
1594 if (IS_VIDEO_CHAIN_IGNORE_ERROR (ret)) {
1595 GST_ERROR_OBJECT (self, "Downstream chain error: %s",
1596 gst_flow_get_name (ret));
1597 self->downstream_chain_error = TRUE;
1600 gst_object_unref (self);
1601 gst_object_unref (ghostpad);
1607 gst_subtitle_overlay_src_proxy_event (GstPad * proxypad, GstEvent * event)
1609 GstPad *ghostpad = NULL;
1610 GstSubtitleOverlay *self = NULL;
1611 gboolean ret = FALSE;
1612 const GstStructure *s;
1614 ghostpad = GST_PAD_CAST (gst_pad_get_parent (proxypad));
1615 if (G_UNLIKELY (!ghostpad))
1617 self = GST_SUBTITLE_OVERLAY_CAST (gst_pad_get_parent (ghostpad));
1618 if (G_UNLIKELY (!self || self->srcpad != ghostpad))
1621 s = gst_event_get_structure (event);
1622 if (s && gst_structure_id_has_field (s, _subtitle_overlay_event_marker_id)) {
1623 GST_DEBUG_OBJECT (ghostpad, "Dropping event with marker: %" GST_PTR_FORMAT,
1625 gst_event_unref (event);
1629 ret = self->src_proxy_event (proxypad, event);
1635 gst_event_unref (event);
1637 gst_object_unref (self);
1639 gst_object_unref (ghostpad);
1644 gst_subtitle_overlay_video_sink_setcaps (GstPad * pad, GstCaps * caps)
1646 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1647 gboolean ret = TRUE;
1650 GST_DEBUG_OBJECT (pad, "Setting caps: %" GST_PTR_FORMAT, caps);
1652 if (!gst_video_parse_caps_framerate (caps, &fps_n, &fps_d)) {
1653 GST_ERROR_OBJECT (pad, "Failed to parse framerate from caps");
1658 GST_SUBTITLE_OVERLAY_LOCK (self);
1659 if (self->fps_n != fps_n || self->fps_d != fps_d) {
1660 GST_DEBUG_OBJECT (self, "New video fps: %d/%d", fps_n, fps_d);
1661 self->fps_n = fps_n;
1662 self->fps_d = fps_d;
1663 gst_subtitle_overlay_set_fps (self);
1665 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1667 ret = self->video_sink_setcaps (pad, caps);
1670 gst_object_unref (self);
1675 gst_subtitle_overlay_video_sink_event (GstPad * pad, GstEvent * event)
1677 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1680 if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
1681 GST_DEBUG_OBJECT (pad,
1682 "Resetting video segment because of flush-stop event");
1683 gst_segment_init (&self->video_segment, GST_FORMAT_UNDEFINED);
1684 self->fps_n = self->fps_d = 0;
1687 ret = self->video_sink_event (pad, gst_event_ref (event));
1689 if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
1691 gdouble rate, applied_rate;
1693 gint64 start, stop, position;
1695 GST_DEBUG_OBJECT (pad, "Newsegment event: %" GST_PTR_FORMAT,
1697 gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
1698 &format, &start, &stop, &position);
1700 if (format != GST_FORMAT_TIME) {
1701 GST_ERROR_OBJECT (pad, "Newsegment event in non-time format: %s",
1702 gst_format_get_name (format));
1703 gst_object_unref (event);
1704 gst_object_unref (self);
1708 GST_DEBUG_OBJECT (pad, "Old video segment: %" GST_SEGMENT_FORMAT,
1709 &self->video_segment);
1710 gst_segment_set_newsegment_full (&self->video_segment, update, rate,
1711 applied_rate, format, start, stop, position);
1712 GST_DEBUG_OBJECT (pad, "New video segment: %" GST_SEGMENT_FORMAT,
1713 &self->video_segment);
1716 gst_event_unref (event);
1717 gst_object_unref (self);
1721 static GstFlowReturn
1722 gst_subtitle_overlay_video_sink_chain (GstPad * pad, GstBuffer * buffer)
1724 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (GST_PAD_PARENT (pad));
1725 GstFlowReturn ret = self->video_sink_chain (pad, buffer);
1727 if (G_UNLIKELY (self->downstream_chain_error) || self->passthrough_identity) {
1729 } else if (IS_VIDEO_CHAIN_IGNORE_ERROR (ret)) {
1730 GST_DEBUG_OBJECT (self, "Subtitle renderer produced chain error: %s",
1731 gst_flow_get_name (ret));
1732 GST_SUBTITLE_OVERLAY_LOCK (self);
1733 self->subtitle_error = TRUE;
1734 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1735 _pad_blocked_cb, gst_object_ref (self),
1736 (GDestroyNotify) gst_object_unref);
1738 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1739 _pad_blocked_cb, gst_object_ref (self),
1740 (GDestroyNotify) gst_object_unref);
1741 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1749 static GstFlowReturn
1750 gst_subtitle_overlay_subtitle_sink_chain (GstPad * pad, GstBuffer * buffer)
1752 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (GST_PAD_PARENT (pad));
1754 if (self->subtitle_error) {
1755 gst_buffer_unref (buffer);
1758 GstFlowReturn ret = self->subtitle_sink_chain (pad, buffer);
1760 if (IS_SUBTITLE_CHAIN_IGNORE_ERROR (ret)) {
1761 GST_DEBUG_OBJECT (self, "Subtitle chain error: %s",
1762 gst_flow_get_name (ret));
1763 GST_SUBTITLE_OVERLAY_LOCK (self);
1764 self->subtitle_error = TRUE;
1765 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1766 _pad_blocked_cb, gst_object_ref (self),
1767 (GDestroyNotify) gst_object_unref);
1769 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1770 _pad_blocked_cb, gst_object_ref (self),
1771 (GDestroyNotify) gst_object_unref);
1772 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1782 gst_subtitle_overlay_subtitle_sink_getcaps (GstPad * pad)
1784 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1787 g_mutex_lock (self->factories_lock);
1788 if (G_UNLIKELY (!gst_subtitle_overlay_update_factory_list (self)))
1789 ret = GST_CAPS_NONE;
1791 ret = gst_caps_ref (self->factory_caps);
1792 g_mutex_unlock (self->factories_lock);
1794 GST_DEBUG_OBJECT (pad, "Returning subtitle caps %" GST_PTR_FORMAT, ret);
1796 gst_object_unref (self);
1802 gst_subtitle_overlay_subtitle_sink_acceptcaps (GstPad * pad, GstCaps * caps)
1804 GstCaps *othercaps = gst_subtitle_overlay_subtitle_sink_getcaps (pad);
1805 gboolean ret = gst_caps_can_intersect (caps, othercaps);
1807 gst_caps_unref (othercaps);
1813 gst_subtitle_overlay_subtitle_sink_setcaps (GstPad * pad, GstCaps * caps)
1815 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1816 gboolean ret = TRUE;
1817 GstPad *target = NULL;;
1819 GST_DEBUG_OBJECT (pad, "Setting caps: %" GST_PTR_FORMAT, caps);
1822 gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad));
1824 GST_SUBTITLE_OVERLAY_LOCK (self);
1825 gst_caps_replace (&self->subcaps, caps);
1827 if (target && gst_pad_accept_caps (target, caps)) {
1828 GST_DEBUG_OBJECT (pad, "Target accepts caps");
1829 ret = self->subtitle_sink_setcaps (pad, caps);
1830 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1834 GST_DEBUG_OBJECT (pad, "Target did not accept caps");
1836 self->subtitle_error = FALSE;
1838 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1839 _pad_blocked_cb, gst_object_ref (self),
1840 (GDestroyNotify) gst_object_unref);
1842 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1843 _pad_blocked_cb, gst_object_ref (self),
1844 (GDestroyNotify) gst_object_unref);
1845 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1849 gst_object_unref (target);
1850 gst_object_unref (self);
1854 static GstPadLinkReturn
1855 gst_subtitle_overlay_subtitle_sink_link (GstPad * pad, GstPad * peer)
1857 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1858 GstPadLinkReturn ret;
1861 GST_DEBUG_OBJECT (pad, "Linking pad to peer %" GST_PTR_FORMAT, peer);
1863 caps = gst_pad_get_negotiated_caps (peer);
1865 caps = gst_pad_get_caps_reffed (peer);
1866 if (!gst_caps_is_fixed (caps)) {
1867 gst_caps_unref (caps);
1873 GST_SUBTITLE_OVERLAY_LOCK (self);
1874 GST_DEBUG_OBJECT (pad, "Have fixed peer caps: %" GST_PTR_FORMAT, caps);
1875 gst_caps_replace (&self->subcaps, caps);
1877 self->subtitle_error = FALSE;
1879 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1880 _pad_blocked_cb, gst_object_ref (self),
1881 (GDestroyNotify) gst_object_unref);
1883 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1884 _pad_blocked_cb, gst_object_ref (self),
1885 (GDestroyNotify) gst_object_unref);
1886 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1887 gst_caps_unref (caps);
1890 ret = self->subtitle_sink_link (pad, peer);
1892 gst_object_unref (self);
1897 gst_subtitle_overlay_subtitle_sink_unlink (GstPad * pad)
1899 GstSubtitleOverlay *self =
1900 GST_SUBTITLE_OVERLAY (gst_object_ref (GST_PAD_PARENT (pad)));
1902 /* FIXME: Can't use gst_pad_get_parent() here because this is called with
1903 * the object lock from state changes
1906 GST_DEBUG_OBJECT (pad, "Pad unlinking");
1907 gst_caps_replace (&self->subcaps, NULL);
1909 self->subtitle_sink_unlink (pad);
1911 GST_SUBTITLE_OVERLAY_LOCK (self);
1912 self->subtitle_error = FALSE;
1914 if (self->subtitle_block_pad)
1915 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1916 _pad_blocked_cb, gst_object_ref (self),
1917 (GDestroyNotify) gst_object_unref);
1919 if (self->video_block_pad)
1920 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1921 _pad_blocked_cb, gst_object_ref (self),
1922 (GDestroyNotify) gst_object_unref);
1923 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1925 gst_object_unref (self);
1929 gst_subtitle_overlay_subtitle_sink_event (GstPad * pad, GstEvent * event)
1931 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1935 if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_DOWNSTREAM_OOB &&
1937 && strcmp (gst_structure_get_name (event->structure),
1938 "subtitleoverlay-flush-subtitle") == 0) {
1939 GST_DEBUG_OBJECT (pad, "Custom subtitle flush event");
1940 GST_SUBTITLE_OVERLAY_LOCK (self);
1941 self->subtitle_flush = TRUE;
1942 self->subtitle_error = FALSE;
1943 if (self->subtitle_block_pad)
1944 gst_pad_set_blocked_async_full (self->subtitle_block_pad, TRUE,
1945 _pad_blocked_cb, gst_object_ref (self),
1946 (GDestroyNotify) gst_object_unref);
1947 if (self->video_block_pad)
1948 gst_pad_set_blocked_async_full (self->video_block_pad, TRUE,
1949 _pad_blocked_cb, gst_object_ref (self),
1950 (GDestroyNotify) gst_object_unref);
1951 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1953 gst_event_unref (event);
1957 } else if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
1958 gst_event_parse_new_segment_full (event, NULL, NULL, NULL,
1959 &format, NULL, NULL, NULL);
1960 if (self->subtitle_segment.format != GST_FORMAT_UNDEFINED &&
1961 self->subtitle_segment.format != format) {
1962 GST_DEBUG_OBJECT (pad, "Subtitle segment format changed: %s -> %s",
1963 gst_format_get_name (self->subtitle_segment.format),
1964 gst_format_get_name (format));
1965 gst_segment_init (&self->subtitle_segment, GST_FORMAT_UNDEFINED);
1969 switch (GST_EVENT_TYPE (event)) {
1970 case GST_EVENT_FLUSH_STOP:
1971 GST_DEBUG_OBJECT (pad,
1972 "Resetting subtitle segment because of flush-stop");
1973 gst_segment_init (&self->subtitle_segment, GST_FORMAT_UNDEFINED);
1975 case GST_EVENT_FLUSH_START:
1976 case GST_EVENT_NEWSEGMENT:
1978 /* Add our event marker to make sure no events from here go ever outside
1979 * the element, they're only interesting for our internal elements */
1981 GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST
1983 if (!event->structure) {
1985 gst_structure_id_empty_new (_subtitle_overlay_event_marker_id);
1986 gst_structure_set_parent_refcount (event->structure,
1987 &event->mini_object.refcount);
1989 gst_structure_id_set (event->structure, _subtitle_overlay_event_marker_id,
1990 G_TYPE_BOOLEAN, TRUE, NULL);
1996 ret = self->subtitle_sink_event (pad, gst_event_ref (event));
1998 if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
2000 gdouble rate, applied_rate;
2001 gint64 start, stop, position;
2003 GST_DEBUG_OBJECT (pad, "Newsegment event: %" GST_PTR_FORMAT,
2005 gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
2006 &format, &start, &stop, &position);
2008 GST_DEBUG_OBJECT (pad, "Old subtitle segment: %" GST_SEGMENT_FORMAT,
2009 &self->subtitle_segment);
2010 if (self->subtitle_segment.format != format) {
2011 GST_DEBUG_OBJECT (pad, "Subtitle segment format changed: %s -> %s",
2012 gst_format_get_name (self->subtitle_segment.format),
2013 gst_format_get_name (format));
2014 gst_segment_init (&self->subtitle_segment, format);
2017 gst_segment_set_newsegment_full (&self->subtitle_segment, update, rate,
2018 applied_rate, format, start, stop, position);
2019 GST_DEBUG_OBJECT (pad, "New subtitle segment: %" GST_SEGMENT_FORMAT,
2020 &self->subtitle_segment);
2022 gst_event_unref (event);
2025 gst_object_unref (self);
2030 gst_subtitle_overlay_init (GstSubtitleOverlay * self,
2031 GstSubtitleOverlayClass * klass)
2033 GstPadTemplate *templ;
2035 GstPad *proxypad = NULL;
2037 self->lock = g_mutex_new ();
2038 self->factories_lock = g_mutex_new ();
2040 templ = gst_static_pad_template_get (&srctemplate);
2041 self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", templ);
2042 it = gst_pad_iterate_internal_links (self->srcpad);
2044 || gst_iterator_next (it, (gpointer) & proxypad) != GST_ITERATOR_OK
2045 || proxypad == NULL)) {
2046 GST_ERROR_OBJECT (self, "Failed to get proxypad of srcpad");
2048 self->src_proxy_event = GST_PAD_EVENTFUNC (proxypad);
2049 gst_pad_set_event_function (proxypad,
2050 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_src_proxy_event));
2051 self->src_proxy_chain = GST_PAD_CHAINFUNC (proxypad);
2052 gst_pad_set_chain_function (proxypad,
2053 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_src_proxy_chain));
2054 gst_object_unref (proxypad);
2057 gst_iterator_free (it);
2059 gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
2061 templ = gst_static_pad_template_get (&video_sinktemplate);
2062 self->video_sinkpad =
2063 gst_ghost_pad_new_no_target_from_template ("video_sink", templ);
2064 self->video_sink_event = GST_PAD_EVENTFUNC (self->video_sinkpad);
2065 gst_pad_set_event_function (self->video_sinkpad,
2066 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_video_sink_event));
2067 self->video_sink_setcaps = GST_PAD_SETCAPSFUNC (self->video_sinkpad);
2068 gst_pad_set_setcaps_function (self->video_sinkpad,
2069 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_video_sink_setcaps));
2070 self->video_sink_chain = GST_PAD_CHAINFUNC (self->video_sinkpad);
2071 gst_pad_set_chain_function (self->video_sinkpad,
2072 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_video_sink_chain));
2075 it = gst_pad_iterate_internal_links (self->video_sinkpad);
2077 || gst_iterator_next (it, (gpointer) & proxypad) != GST_ITERATOR_OK
2078 || proxypad == NULL)) {
2079 GST_ERROR_OBJECT (self,
2080 "Failed to get internally linked pad from video sinkpad");
2083 gst_iterator_free (it);
2084 self->video_block_pad = proxypad;
2085 gst_element_add_pad (GST_ELEMENT_CAST (self), self->video_sinkpad);
2087 templ = gst_static_pad_template_get (&subtitle_sinktemplate);
2088 self->subtitle_sinkpad =
2089 gst_ghost_pad_new_no_target_from_template ("subtitle_sink", templ);
2090 self->subtitle_sink_link = GST_PAD_LINKFUNC (self->subtitle_sinkpad);
2091 gst_pad_set_link_function (self->subtitle_sinkpad,
2092 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_link));
2093 self->subtitle_sink_unlink = GST_PAD_UNLINKFUNC (self->subtitle_sinkpad);
2094 gst_pad_set_unlink_function (self->subtitle_sinkpad,
2095 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_unlink));
2096 self->subtitle_sink_event = GST_PAD_EVENTFUNC (self->subtitle_sinkpad);
2097 gst_pad_set_event_function (self->subtitle_sinkpad,
2098 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_event));
2099 self->subtitle_sink_setcaps = GST_PAD_SETCAPSFUNC (self->subtitle_sinkpad);
2100 gst_pad_set_setcaps_function (self->subtitle_sinkpad,
2101 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_setcaps));
2102 self->subtitle_sink_chain = GST_PAD_CHAINFUNC (self->subtitle_sinkpad);
2103 gst_pad_set_chain_function (self->subtitle_sinkpad,
2104 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_chain));
2105 gst_pad_set_getcaps_function (self->subtitle_sinkpad,
2106 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_getcaps));
2107 gst_pad_set_acceptcaps_function (self->subtitle_sinkpad,
2108 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_acceptcaps));
2109 gst_pad_set_bufferalloc_function (self->subtitle_sinkpad, NULL);
2112 it = gst_pad_iterate_internal_links (self->subtitle_sinkpad);
2114 || gst_iterator_next (it, (gpointer) & proxypad) != GST_ITERATOR_OK
2115 || proxypad == NULL)) {
2116 GST_ERROR_OBJECT (self,
2117 "Failed to get internally linked pad from subtitle sinkpad");
2120 gst_iterator_free (it);
2121 self->subtitle_block_pad = proxypad;
2123 gst_element_add_pad (GST_ELEMENT_CAST (self), self->subtitle_sinkpad);
2130 gst_subtitle_overlay_plugin_init (GstPlugin * plugin)
2132 GST_DEBUG_CATEGORY_INIT (subtitle_overlay_debug, "subtitleoverlay", 0,
2133 "Subtitle Overlay");
2135 _subtitle_overlay_event_marker_id =
2136 g_quark_from_static_string ("gst-subtitle-overlay-event-marker");
2138 return gst_element_register (plugin, "subtitleoverlay", GST_RANK_NONE,
2139 GST_TYPE_SUBTITLE_OVERLAY);