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 ! decodebin ! subtitleoverlay name=overlay ! videoconvert ! autovideosink demux. ! "subpicture/x-dvd" ! queue2 ! overlay.
33 * ]| This will play back the given Matroska file with h264 video and subpicture subtitles.
41 #include "gstsubtitleoverlay.h"
43 #include <gst/pbutils/missing-plugins.h>
44 #include <gst/video/video.h>
47 #include "gst/glib-compat-private.h"
49 GST_DEBUG_CATEGORY_STATIC (subtitle_overlay_debug);
50 #define GST_CAT_DEFAULT subtitle_overlay_debug
52 #define IS_SUBTITLE_CHAIN_IGNORE_ERROR(flow) \
53 G_UNLIKELY (flow == GST_FLOW_ERROR || flow == GST_FLOW_NOT_NEGOTIATED)
55 #define IS_VIDEO_CHAIN_IGNORE_ERROR(flow) \
56 G_UNLIKELY (flow == GST_FLOW_ERROR)
58 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
63 static GstStaticPadTemplate video_sinktemplate =
64 GST_STATIC_PAD_TEMPLATE ("video_sink",
69 static GstStaticPadTemplate subtitle_sinktemplate =
70 GST_STATIC_PAD_TEMPLATE ("subtitle_sink",
80 PROP_SUBTITLE_ENCODING
83 #define gst_subtitle_overlay_parent_class parent_class
84 G_DEFINE_TYPE (GstSubtitleOverlay, gst_subtitle_overlay, GST_TYPE_BIN);
86 static GQuark _subtitle_overlay_event_marker_id = 0;
89 do_async_start (GstSubtitleOverlay * self)
91 if (!self->do_async) {
92 GstMessage *msg = gst_message_new_async_start (GST_OBJECT_CAST (self));
94 GST_DEBUG_OBJECT (self, "Posting async-start");
95 GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (self), msg);
96 self->do_async = TRUE;
101 do_async_done (GstSubtitleOverlay * self)
103 if (self->do_async) {
104 GstMessage *msg = gst_message_new_async_done (GST_OBJECT_CAST (self),
105 GST_CLOCK_TIME_NONE);
107 GST_DEBUG_OBJECT (self, "Posting async-done");
108 GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (self), msg);
109 self->do_async = FALSE;
113 static GstPadProbeReturn
114 _pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data);
117 block_video (GstSubtitleOverlay * self)
119 if (self->video_block_id != 0)
122 if (self->video_block_pad) {
123 self->video_block_id =
124 gst_pad_add_probe (self->video_block_pad,
125 GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, _pad_blocked_cb, self, NULL);
130 unblock_video (GstSubtitleOverlay * self)
132 if (self->video_block_id) {
133 gst_pad_remove_probe (self->video_block_pad, self->video_block_id);
134 self->video_sink_blocked = FALSE;
135 self->video_block_id = 0;
140 block_subtitle (GstSubtitleOverlay * self)
142 if (self->subtitle_block_id != 0)
145 if (self->subtitle_block_pad) {
146 self->subtitle_block_id =
147 gst_pad_add_probe (self->subtitle_block_pad,
148 GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, _pad_blocked_cb, self, NULL);
153 unblock_subtitle (GstSubtitleOverlay * self)
155 if (self->subtitle_block_id) {
156 gst_pad_remove_probe (self->subtitle_block_pad, self->subtitle_block_id);
157 self->subtitle_sink_blocked = FALSE;
158 self->subtitle_block_id = 0;
163 gst_subtitle_overlay_finalize (GObject * object)
165 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (object);
168 g_mutex_free (self->lock);
172 if (self->factories_lock) {
173 g_mutex_free (self->factories_lock);
174 self->factories_lock = NULL;
178 gst_plugin_feature_list_free (self->factories);
179 self->factories = NULL;
180 gst_caps_replace (&self->factory_caps, NULL);
182 if (self->font_desc) {
183 g_free (self->font_desc);
184 self->font_desc = NULL;
187 if (self->encoding) {
188 g_free (self->encoding);
189 self->encoding = NULL;
192 G_OBJECT_CLASS (parent_class)->finalize (object);
196 _is_renderer (GstElementFactory * factory)
198 const gchar *klass, *name;
200 klass = gst_element_factory_get_klass (factory);
201 name = gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
203 if (strstr (klass, "Overlay/Subtitle") != NULL ||
204 strstr (klass, "Overlay/SubPicture") != NULL)
206 if (strcmp (name, "textoverlay") == 0)
212 _is_parser (GstElementFactory * factory)
216 klass = gst_element_factory_get_klass (factory);
218 if (strstr (klass, "Parser/Subtitle") != NULL)
223 static const gchar *const _sub_pad_names[] = { "subpicture", "subpicture_sink",
225 "subtitle_sink", "subtitle"
228 static inline gboolean
229 _is_raw_video (GstStructure * s)
233 name = gst_structure_get_name (s);
235 if (g_str_equal (name, "video/x-raw"))
241 _is_video_pad (GstPad * pad, gboolean * hw_accelerated)
243 GstPad *peer = gst_pad_get_peer (pad);
249 caps = gst_pad_get_current_caps (peer);
251 caps = gst_pad_query_caps (peer, NULL);
253 gst_object_unref (peer);
255 caps = gst_pad_query_caps (pad, NULL);
258 name = gst_structure_get_name (gst_caps_get_structure (caps, 0));
259 if (g_str_equal (name, "video/x-raw")) {
262 *hw_accelerated = FALSE;
264 } else if (g_str_has_prefix (name, "video/x-surface")) {
267 *hw_accelerated = TRUE;
272 *hw_accelerated = FALSE;
275 gst_caps_unref (caps);
281 _get_sub_caps (GstElementFactory * factory)
283 const GList *templates;
285 gboolean is_parser = _is_parser (factory);
287 templates = gst_element_factory_get_static_pad_templates (factory);
288 for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
289 GstStaticPadTemplate *templ = walk->data;
291 if (templ->direction == GST_PAD_SINK && templ->presence == GST_PAD_ALWAYS) {
292 gboolean found = FALSE;
299 for (i = 0; i < G_N_ELEMENTS (_sub_pad_names); i++) {
300 if (strcmp (templ->name_template, _sub_pad_names[i]) == 0) {
307 return gst_static_caps_get (&templ->static_caps);
314 _factory_filter (GstPluginFeature * feature, GstCaps ** subcaps)
316 GstElementFactory *factory;
319 const GList *templates;
321 gboolean is_renderer;
322 GstCaps *templ_caps = NULL;
323 gboolean have_video_sink = FALSE;
325 /* we only care about element factories */
326 if (!GST_IS_ELEMENT_FACTORY (feature))
329 factory = GST_ELEMENT_FACTORY_CAST (feature);
331 /* only select elements with autoplugging rank or textoverlay */
332 name = gst_plugin_feature_get_name (feature);
333 rank = gst_plugin_feature_get_rank (feature);
334 if (strcmp ("textoverlay", name) != 0 && rank < GST_RANK_MARGINAL)
337 /* Check if it's a renderer or a parser */
338 if (_is_renderer (factory)) {
340 } else if (_is_parser (factory)) {
346 /* Check if there's a video sink in case of a renderer */
348 templates = gst_element_factory_get_static_pad_templates (factory);
349 for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
350 GstStaticPadTemplate *templ = walk->data;
352 /* we only care about the always-sink templates */
353 if (templ->direction == GST_PAD_SINK && templ->presence == GST_PAD_ALWAYS) {
354 if (strcmp (templ->name_template, "video") == 0 ||
355 strcmp (templ->name_template, "video_sink") == 0) {
356 have_video_sink = TRUE;
361 templ_caps = _get_sub_caps (factory);
363 if (is_renderer && have_video_sink && templ_caps) {
364 GST_DEBUG ("Found renderer element %s (%s) with caps %" GST_PTR_FORMAT,
365 gst_element_factory_get_longname (factory),
366 gst_plugin_feature_get_name (feature), templ_caps);
367 *subcaps = gst_caps_merge (*subcaps, templ_caps);
369 } else if (!is_renderer && !have_video_sink && templ_caps) {
370 GST_DEBUG ("Found parser element %s (%s) with caps %" GST_PTR_FORMAT,
371 gst_element_factory_get_longname (factory),
372 gst_plugin_feature_get_name (feature), templ_caps);
373 *subcaps = gst_caps_merge (*subcaps, templ_caps);
377 gst_caps_unref (templ_caps);
382 /* Call with factories_lock! */
384 gst_subtitle_overlay_update_factory_list (GstSubtitleOverlay * self)
386 GstRegistry *registry;
389 registry = gst_registry_get ();
390 cookie = gst_registry_get_feature_list_cookie (registry);
391 if (!self->factories || self->factories_cookie != cookie) {
395 subcaps = gst_caps_new_empty ();
397 factories = gst_registry_feature_filter (registry,
398 (GstPluginFeatureFilter) _factory_filter, FALSE, &subcaps);
399 GST_DEBUG_OBJECT (self, "Created factory caps: %" GST_PTR_FORMAT, subcaps);
400 gst_caps_replace (&self->factory_caps, subcaps);
401 gst_caps_unref (subcaps);
403 gst_plugin_feature_list_free (self->factories);
404 self->factories = factories;
405 self->factories_cookie = cookie;
408 return (self->factories != NULL);
411 G_LOCK_DEFINE_STATIC (_factory_caps);
412 static GstCaps *_factory_caps = NULL;
413 static guint32 _factory_caps_cookie = 0;
416 gst_subtitle_overlay_create_factory_caps (void)
418 GstRegistry *registry;
420 GstCaps *subcaps = NULL;
423 registry = gst_registry_get ();
424 cookie = gst_registry_get_feature_list_cookie (registry);
425 G_LOCK (_factory_caps);
426 if (!_factory_caps || _factory_caps_cookie != cookie) {
428 gst_caps_unref (_factory_caps);
429 _factory_caps = gst_caps_new_empty ();
431 factories = gst_registry_feature_filter (registry,
432 (GstPluginFeatureFilter) _factory_filter, FALSE, &_factory_caps);
433 GST_DEBUG ("Created factory caps: %" GST_PTR_FORMAT, _factory_caps);
434 gst_plugin_feature_list_free (factories);
435 _factory_caps_cookie = cookie;
437 subcaps = gst_caps_ref (_factory_caps);
438 G_UNLOCK (_factory_caps);
444 check_factory_for_caps (GstElementFactory * factory, const GstCaps * caps)
446 GstCaps *fcaps = _get_sub_caps (factory);
447 gboolean ret = (fcaps) ? gst_caps_can_intersect (fcaps, caps) : FALSE;
450 gst_caps_unref (fcaps);
453 gst_object_ref (factory);
458 gst_subtitle_overlay_get_factories_for_caps (const GList * list,
459 const GstCaps * caps)
461 const GList *walk = list;
462 GList *result = NULL;
465 GstElementFactory *factory = walk->data;
467 walk = g_list_next (walk);
469 if (check_factory_for_caps (factory, caps)) {
470 result = g_list_prepend (result, factory);
478 _sort_by_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
481 const gchar *rname1, *rname2;
483 diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
487 /* If the ranks are the same sort by name to get deterministic results */
488 rname1 = gst_plugin_feature_get_name (f1);
489 rname2 = gst_plugin_feature_get_name (f2);
491 diff = strcmp (rname1, rname2);
497 _get_sub_pad (GstElement * element)
502 for (i = 0; i < G_N_ELEMENTS (_sub_pad_names); i++) {
503 pad = gst_element_get_static_pad (element, _sub_pad_names[i]);
511 _get_video_pad (GstElement * element)
513 static const gchar *const pad_names[] = { "video", "video_sink" };
517 for (i = 0; i < G_N_ELEMENTS (pad_names); i++) {
518 pad = gst_element_get_static_pad (element, pad_names[i]);
526 _create_element (GstSubtitleOverlay * self, GstElement ** element,
527 const gchar * factory_name, GstElementFactory * factory,
528 const gchar * element_name, gboolean mandatory)
532 g_assert (!factory || !factory_name);
535 elt = gst_element_factory_make (factory_name, element_name);
538 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
539 elt = gst_element_factory_create (factory, element_name);
542 if (G_UNLIKELY (!elt)) {
547 gst_missing_element_message_new (GST_ELEMENT_CAST (self),
549 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
552 GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
553 ("no '%s' plugin found", factory_name));
555 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN, (NULL),
556 ("no '%s' plugin found", factory_name));
559 GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
560 ("can't instantiate '%s'", factory_name));
562 GST_ELEMENT_WARNING (self, CORE, FAILED, (NULL),
563 ("can't instantiate '%s'", factory_name));
570 if (G_UNLIKELY (gst_element_set_state (elt,
571 GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS)) {
572 gst_object_unref (elt);
574 GST_ELEMENT_ERROR (self, CORE, STATE_CHANGE, (NULL),
575 ("failed to set '%s' to READY", factory_name));
577 GST_WARNING_OBJECT (self, "Failed to set '%s' to READY", factory_name);
582 if (G_UNLIKELY (!gst_bin_add (GST_BIN_CAST (self), gst_object_ref (elt)))) {
583 gst_element_set_state (elt, GST_STATE_NULL);
584 gst_object_unref (elt);
586 GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
587 ("failed to add '%s' to subtitleoverlay", factory_name));
589 GST_WARNING_OBJECT (self, "Failed to add '%s' to subtitleoverlay",
595 gst_element_sync_state_with_parent (elt);
601 _remove_element (GstSubtitleOverlay * self, GstElement ** element)
604 gst_bin_remove (GST_BIN_CAST (self), *element);
605 gst_element_set_state (*element, GST_STATE_NULL);
606 gst_object_unref (*element);
612 _pad_query_convert_to_time (GstPad * pad, GstFormat src_format, gint64 src_val,
615 GstFormat dest_format;
617 if (src_val == GST_CLOCK_TIME_NONE) {
618 *dest_val = GST_CLOCK_TIME_NONE;
622 dest_format = GST_FORMAT_TIME;
623 return gst_pad_query_convert (pad, src_format, src_val, dest_format,
628 _generate_update_segment_event (GstPad * pad, GstSegment * segment,
632 GstStructure *structure;
633 GstSegment newsegment;
634 gboolean use_newseg = FALSE;
635 gint64 start, stop, base, time, position, duration;
637 /* always push newsegment with format TIME */
638 if (segment->format != GST_FORMAT_TIME) {
642 peer = gst_pad_get_peer (pad);
644 res = _pad_query_convert_to_time (peer, segment->format,
645 segment->start, &start);
646 res = res && _pad_query_convert_to_time (peer, segment->format,
647 segment->stop, &stop);
648 res = res && _pad_query_convert_to_time (peer, segment->format,
649 segment->time, &time);
650 res = res && _pad_query_convert_to_time (peer, segment->format,
651 segment->base, &base);
652 res = res && _pad_query_convert_to_time (peer, segment->format,
653 segment->position, &position);
654 res = res && _pad_query_convert_to_time (peer, segment->format,
655 segment->duration, &duration);
658 stop = GST_CLOCK_TIME_NONE;
661 duration = GST_CLOCK_TIME_NONE;
665 gst_segment_init (&newsegment, GST_FORMAT_TIME);
666 newsegment.rate = segment->rate;
667 newsegment.applied_rate = segment->applied_rate;
668 newsegment.start = start;
669 newsegment.stop = stop;
670 newsegment.time = time;
671 newsegment.base = base;
672 newsegment.position = position;
673 newsegment.duration = duration;
676 gst_object_unref (peer);
681 event = gst_event_new_segment (&newsegment);
683 event = gst_event_new_segment (segment);
685 structure = gst_event_writable_structure (event);
686 gst_structure_id_set (structure, _subtitle_overlay_event_marker_id,
687 G_TYPE_BOOLEAN, TRUE, NULL);
692 _setup_passthrough (GstSubtitleOverlay * self)
695 GstElement *identity;
697 GST_DEBUG_OBJECT (self, "Doing video passthrough");
699 if (self->passthrough_identity) {
700 GST_DEBUG_OBJECT (self, "Already in passthrough mode");
704 /* Unlink & destroy everything */
705 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
706 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
707 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad), NULL);
708 self->silent_property = NULL;
709 _remove_element (self, &self->post_colorspace);
710 _remove_element (self, &self->overlay);
711 _remove_element (self, &self->parser);
712 _remove_element (self, &self->renderer);
713 _remove_element (self, &self->pre_colorspace);
714 _remove_element (self, &self->passthrough_identity);
716 if (G_UNLIKELY (!_create_element (self, &self->passthrough_identity,
717 "identity", NULL, "passthrough-identity", TRUE))) {
721 identity = self->passthrough_identity;
722 g_object_set (G_OBJECT (identity), "silent", TRUE, "signal-handoffs", FALSE,
725 /* Set src ghostpad target */
726 src = gst_element_get_static_pad (self->passthrough_identity, "src");
727 if (G_UNLIKELY (!src)) {
728 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
729 ("Failed to get srcpad from identity"));
733 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
735 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
736 ("Failed to set srcpad target"));
737 gst_object_unref (src);
740 gst_object_unref (src);
742 sink = gst_element_get_static_pad (self->passthrough_identity, "sink");
743 if (G_UNLIKELY (!sink)) {
744 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
745 ("Failed to get sinkpad from identity"));
749 /* Send segment to the identity. This is dropped because identity
750 * is not linked downstream yet */
751 if (self->video_segment.format != GST_FORMAT_UNDEFINED) {
754 _generate_update_segment_event (sink, &self->video_segment, &event1);
755 GST_DEBUG_OBJECT (self,
756 "Pushing video segment event: %" GST_PTR_FORMAT, event1);
757 gst_pad_send_event (sink, event1);
760 /* Link sink ghostpads to identity */
761 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
762 (self->video_sinkpad), sink))) {
763 GST_ELEMENT_ERROR (self, CORE, PAD, (NULL),
764 ("Failed to set video sinkpad target"));
765 gst_object_unref (sink);
768 gst_object_unref (sink);
770 GST_DEBUG_OBJECT (self, "Video passthrough setup successfully");
774 unblock_video (self);
775 unblock_subtitle (self);
780 /* Must be called with subtitleoverlay lock! */
782 _has_property_with_type (GObject * object, const gchar * property, GType type)
784 GObjectClass *gobject_class;
787 gobject_class = G_OBJECT_GET_CLASS (object);
788 pspec = g_object_class_find_property (gobject_class, property);
789 return (pspec && pspec->value_type == type);
793 gst_subtitle_overlay_set_fps (GstSubtitleOverlay * self)
795 if (!self->parser || self->fps_d == 0)
798 if (!_has_property_with_type (G_OBJECT (self->parser), "video-fps",
802 GST_DEBUG_OBJECT (self, "Updating video-fps property in parser");
803 g_object_set (self->parser, "video-fps", self->fps_n, self->fps_d, NULL);
807 _get_silent_property (GstElement * element, gboolean * invert)
818 for (i = 0; i < G_N_ELEMENTS (properties); i++) {
819 if (_has_property_with_type (G_OBJECT (element), properties[i].name,
821 *invert = properties[i].invert;
822 return properties[i].name;
829 _setup_parser (GstSubtitleOverlay * self)
833 /* Try to get the latest video framerate */
834 video_peer = gst_pad_get_peer (self->video_sinkpad);
839 video_caps = gst_pad_get_current_caps (video_peer);
841 video_caps = gst_pad_query_caps (video_peer, NULL);
842 if (!gst_caps_is_fixed (video_caps)) {
843 gst_caps_unref (video_caps);
849 GstStructure *st = gst_caps_get_structure (video_caps, 0);
850 if (gst_structure_get_fraction (st, "framerate", &fps_n, &fps_d)) {
851 GST_DEBUG_OBJECT (self, "New video fps: %d/%d", fps_n, fps_d);
858 gst_caps_unref (video_caps);
859 gst_object_unref (video_peer);
862 if (_has_property_with_type (G_OBJECT (self->parser), "subtitle-encoding",
864 g_object_set (self->parser, "subtitle-encoding", self->encoding, NULL);
866 /* Try to set video fps on the parser */
867 gst_subtitle_overlay_set_fps (self);
874 _setup_renderer (GstSubtitleOverlay * self, GstElement * renderer)
876 GstElementFactory *factory = gst_element_get_factory (renderer);
878 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory));
880 if (strcmp (name, "textoverlay") == 0) {
881 /* Set some textoverlay specific properties */
882 gst_util_set_object_arg (G_OBJECT (renderer), "halignment", "center");
883 gst_util_set_object_arg (G_OBJECT (renderer), "valignment", "bottom");
884 g_object_set (G_OBJECT (renderer), "wait-text", FALSE, NULL);
886 g_object_set (G_OBJECT (renderer), "font-desc", self->font_desc, NULL);
887 self->silent_property = "silent";
888 self->silent_property_invert = FALSE;
890 self->silent_property =
891 _get_silent_property (renderer, &self->silent_property_invert);
892 if (_has_property_with_type (G_OBJECT (renderer), "subtitle-encoding",
894 g_object_set (renderer, "subtitle-encoding", self->encoding, NULL);
895 if (_has_property_with_type (G_OBJECT (renderer), "font-desc",
897 g_object_set (renderer, "font-desc", self->font_desc, NULL);
903 /* subtitle_src==NULL means: use subtitle_sink ghostpad */
905 _link_renderer (GstSubtitleOverlay * self, GstElement * renderer,
906 GstPad * subtitle_src)
909 gboolean is_video, is_hw;
911 is_video = _is_video_pad (self->video_sinkpad, &is_hw);
914 gboolean render_is_hw;
916 /* First check that renderer also supports the video format */
917 sink = _get_video_pad (renderer);
918 if (G_UNLIKELY (!sink)) {
919 GST_WARNING_OBJECT (self, "Can't get video sink from renderer");
923 if (is_video != _is_video_pad (sink, &render_is_hw) ||
924 is_hw != render_is_hw) {
925 GST_DEBUG_OBJECT (self, "Renderer doesn't support %s video",
926 is_hw ? "surface" : "raw");
927 gst_object_unref (sink);
930 gst_object_unref (sink);
933 /* First link everything internally */
934 if (G_UNLIKELY (!_create_element (self, &self->post_colorspace,
935 COLORSPACE, NULL, "post-colorspace", FALSE))) {
938 src = gst_element_get_static_pad (renderer, "src");
939 if (G_UNLIKELY (!src)) {
940 GST_WARNING_OBJECT (self, "Can't get src pad from renderer");
944 sink = gst_element_get_static_pad (self->post_colorspace, "sink");
945 if (G_UNLIKELY (!sink)) {
946 GST_WARNING_OBJECT (self, "Can't get sink pad from " COLORSPACE);
947 gst_object_unref (src);
951 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
952 GST_WARNING_OBJECT (self, "Can't link renderer with " COLORSPACE);
953 gst_object_unref (src);
954 gst_object_unref (sink);
957 gst_object_unref (src);
958 gst_object_unref (sink);
960 if (G_UNLIKELY (!_create_element (self, &self->pre_colorspace,
961 COLORSPACE, NULL, "pre-colorspace", FALSE))) {
965 sink = _get_video_pad (renderer);
966 if (G_UNLIKELY (!sink)) {
967 GST_WARNING_OBJECT (self, "Can't get video sink from renderer");
971 src = gst_element_get_static_pad (self->pre_colorspace, "src");
972 if (G_UNLIKELY (!src)) {
973 GST_WARNING_OBJECT (self, "Can't get srcpad from " COLORSPACE);
974 gst_object_unref (sink);
978 if (G_UNLIKELY (gst_pad_link (src, sink) != GST_PAD_LINK_OK)) {
979 GST_WARNING_OBJECT (self, "Can't link " COLORSPACE " to renderer");
980 gst_object_unref (src);
981 gst_object_unref (sink);
984 gst_object_unref (src);
985 gst_object_unref (sink);
987 /* Set src ghostpad target */
988 src = gst_element_get_static_pad (self->post_colorspace, "src");
989 if (G_UNLIKELY (!src)) {
990 GST_WARNING_OBJECT (self, "Can't get src pad from " COLORSPACE);
994 /* Set src ghostpad target in the harware accelerated case */
996 src = gst_element_get_static_pad (renderer, "src");
997 if (G_UNLIKELY (!src)) {
998 GST_WARNING_OBJECT (self, "Can't get src pad from renderer");
1002 } else { /* No video pad */
1003 GstCaps *allowed_caps, *video_caps = NULL;
1005 gboolean can_intersect = FALSE;
1007 video_peer = gst_pad_get_peer (self->video_sinkpad);
1009 video_caps = gst_pad_get_current_caps (video_peer);
1011 video_caps = gst_pad_query_caps (video_peer, NULL);
1013 gst_object_unref (video_peer);
1016 sink = _get_video_pad (renderer);
1017 if (G_UNLIKELY (!sink)) {
1018 GST_WARNING_OBJECT (self, "Can't get video sink from renderer");
1021 allowed_caps = gst_pad_query_caps (sink, NULL);
1022 gst_object_unref (sink);
1024 if (allowed_caps && video_caps)
1025 can_intersect = gst_caps_can_intersect (allowed_caps, video_caps);
1028 gst_caps_unref (allowed_caps);
1031 gst_caps_unref (video_caps);
1033 if (G_UNLIKELY (!can_intersect)) {
1034 GST_WARNING_OBJECT (self, "Renderer with custom caps is not "
1035 "compatible with video stream");
1039 src = gst_element_get_static_pad (renderer, "src");
1040 if (G_UNLIKELY (!src)) {
1041 GST_WARNING_OBJECT (self, "Can't get src pad from renderer");
1046 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1047 (self->srcpad), src))) {
1048 GST_WARNING_OBJECT (self, "Can't set srcpad target");
1049 gst_object_unref (src);
1052 gst_object_unref (src);
1054 /* Set the sink ghostpad targets */
1055 if (self->pre_colorspace) {
1056 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
1057 if (G_UNLIKELY (!sink)) {
1058 GST_WARNING_OBJECT (self, "Can't get sink pad from " COLORSPACE);
1062 sink = _get_video_pad (renderer);
1063 if (G_UNLIKELY (!sink)) {
1064 GST_WARNING_OBJECT (self, "Can't get sink pad from %" GST_PTR_FORMAT,
1070 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1071 (self->video_sinkpad), sink))) {
1072 GST_WARNING_OBJECT (self, "Can't set video sinkpad target");
1073 gst_object_unref (sink);
1076 gst_object_unref (sink);
1078 sink = _get_sub_pad (renderer);
1079 if (G_UNLIKELY (!sink)) {
1080 GST_WARNING_OBJECT (self, "Failed to get subpad");
1085 if (G_UNLIKELY (gst_pad_link (subtitle_src, sink) != GST_PAD_LINK_OK)) {
1086 GST_WARNING_OBJECT (self, "Failed to link subtitle srcpad with renderer");
1087 gst_object_unref (sink);
1091 if (G_UNLIKELY (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1092 (self->subtitle_sinkpad), sink))) {
1093 GST_WARNING_OBJECT (self, "Failed to set subtitle sink target");
1094 gst_object_unref (sink);
1098 gst_object_unref (sink);
1103 static GstPadProbeReturn
1104 _pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
1106 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (user_data);
1108 GList *l, *factories = NULL;
1110 GST_DEBUG_OBJECT (pad, "Pad blocked");
1112 GST_SUBTITLE_OVERLAY_LOCK (self);
1113 if (pad == self->video_block_pad)
1114 self->video_sink_blocked = TRUE;
1115 else if (pad == self->subtitle_block_pad)
1116 self->subtitle_sink_blocked = TRUE;
1118 /* Now either both or the video sink are blocked */
1120 /* Get current subtitle caps */
1121 subcaps = self->subcaps;
1125 peer = gst_pad_get_peer (self->subtitle_sinkpad);
1127 subcaps = gst_pad_get_current_caps (peer);
1129 subcaps = gst_pad_query_caps (peer, NULL);
1130 if (!gst_caps_is_fixed (subcaps)) {
1131 gst_caps_unref (subcaps);
1135 gst_object_unref (peer);
1137 gst_caps_replace (&self->subcaps, subcaps);
1139 gst_caps_unref (subcaps);
1141 GST_DEBUG_OBJECT (self, "Current subtitle caps: %" GST_PTR_FORMAT, subcaps);
1143 /* If there are no subcaps but the subtitle sink is blocked upstream
1144 * must behave wrong as there are no fixed caps set for the first
1145 * buffer or in-order event */
1146 if (G_UNLIKELY (!subcaps && self->subtitle_sink_blocked)) {
1147 GST_ELEMENT_WARNING (self, CORE, NEGOTIATION, (NULL),
1148 ("Subtitle sink is blocked but we have no subtitle caps"));
1152 if (self->subtitle_error || (self->silent && !self->silent_property)) {
1153 _setup_passthrough (self);
1154 do_async_done (self);
1158 /* Now do something with the caps */
1159 if (subcaps && !self->subtitle_flush) {
1161 gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad));
1163 if (target && gst_pad_query_accept_caps (target, subcaps)) {
1164 GST_DEBUG_OBJECT (pad, "Target accepts caps");
1166 gst_object_unref (target);
1169 unblock_video (self);
1170 unblock_subtitle (self);
1172 } else if (target) {
1173 gst_object_unref (target);
1177 if (self->subtitle_sink_blocked && !self->video_sink_blocked) {
1178 GST_DEBUG_OBJECT (self, "Subtitle sink blocked but video not blocked");
1183 self->subtitle_flush = FALSE;
1185 /* Find our factories */
1186 g_mutex_lock (self->factories_lock);
1187 gst_subtitle_overlay_update_factory_list (self);
1190 gst_subtitle_overlay_get_factories_for_caps (self->factories, subcaps);
1194 msg = gst_missing_decoder_message_new (GST_ELEMENT_CAST (self), subcaps);
1195 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
1196 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN, (NULL),
1197 ("no suitable subtitle plugin found"));
1199 self->subtitle_error = TRUE;
1202 g_mutex_unlock (self->factories_lock);
1205 _setup_passthrough (self);
1206 do_async_done (self);
1210 /* Now the interesting parts are done: subtitle overlaying! */
1212 /* Sort the factories by rank */
1213 factories = g_list_sort (factories, (GCompareFunc) _sort_by_ranks);
1215 for (l = factories; l; l = l->next) {
1216 GstElementFactory *factory = l->data;
1217 gboolean is_renderer = _is_renderer (factory);
1220 /* Unlink & destroy everything */
1222 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
1223 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
1224 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad),
1226 self->silent_property = NULL;
1227 _remove_element (self, &self->post_colorspace);
1228 _remove_element (self, &self->overlay);
1229 _remove_element (self, &self->parser);
1230 _remove_element (self, &self->renderer);
1231 _remove_element (self, &self->pre_colorspace);
1232 _remove_element (self, &self->passthrough_identity);
1234 GST_DEBUG_OBJECT (self, "Trying factory '%s'",
1235 GST_STR_NULL (gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST
1238 if (G_UNLIKELY ((is_renderer
1239 && !_create_element (self, &self->renderer, NULL, factory,
1240 "renderer", FALSE)) || (!is_renderer
1241 && !_create_element (self, &self->parser, NULL, factory,
1246 GstCaps *parser_caps;
1247 GList *overlay_factories, *k;
1249 if (!_setup_parser (self))
1252 /* Find our factories */
1253 src = gst_element_get_static_pad (self->parser, "src");
1254 parser_caps = gst_pad_query_caps (src, NULL);
1255 gst_object_unref (src);
1257 g_assert (parser_caps != NULL);
1259 g_mutex_lock (self->factories_lock);
1260 gst_subtitle_overlay_update_factory_list (self);
1261 GST_DEBUG_OBJECT (self,
1262 "Searching overlay factories for caps %" GST_PTR_FORMAT, parser_caps);
1264 gst_subtitle_overlay_get_factories_for_caps (self->factories,
1266 g_mutex_unlock (self->factories_lock);
1268 if (!overlay_factories) {
1269 GST_WARNING_OBJECT (self,
1270 "Found no suitable overlay factories for caps %" GST_PTR_FORMAT,
1272 gst_caps_unref (parser_caps);
1275 gst_caps_unref (parser_caps);
1277 /* Sort the factories by rank */
1279 g_list_sort (overlay_factories, (GCompareFunc) _sort_by_ranks);
1281 for (k = overlay_factories; k; k = k->next) {
1282 GstElementFactory *overlay_factory = k->data;
1284 GST_DEBUG_OBJECT (self, "Trying overlay factory '%s'",
1285 GST_STR_NULL (gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST
1286 (overlay_factory))));
1288 /* Try this factory and link it, otherwise unlink everything
1289 * again and remove the overlay. Up to this point only the
1290 * parser was instantiated and setup, nothing was linked
1293 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
1294 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad),
1296 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad),
1298 self->silent_property = NULL;
1299 _remove_element (self, &self->post_colorspace);
1300 _remove_element (self, &self->overlay);
1301 _remove_element (self, &self->pre_colorspace);
1303 if (!_create_element (self, &self->overlay, NULL, overlay_factory,
1304 "overlay", FALSE)) {
1305 GST_DEBUG_OBJECT (self, "Could not create element");
1309 if (!_setup_renderer (self, self->overlay)) {
1310 GST_DEBUG_OBJECT (self, "Could not setup element");
1314 src = gst_element_get_static_pad (self->parser, "src");
1315 if (!_link_renderer (self, self->overlay, src)) {
1316 GST_DEBUG_OBJECT (self, "Could not link element");
1317 gst_object_unref (src);
1320 gst_object_unref (src);
1322 /* Everything done here, go out of loop */
1323 GST_DEBUG_OBJECT (self, "%s is a suitable element",
1324 GST_STR_NULL (gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST
1325 (overlay_factory))));
1329 if (overlay_factories)
1330 gst_plugin_feature_list_free (overlay_factories);
1332 if (G_UNLIKELY (k == NULL)) {
1333 GST_WARNING_OBJECT (self, "Failed to find usable overlay factory");
1337 /* Now link subtitle sinkpad of the bin and the parser */
1338 sink = gst_element_get_static_pad (self->parser, "sink");
1339 if (!gst_ghost_pad_set_target (GST_GHOST_PAD_CAST
1340 (self->subtitle_sinkpad), sink)) {
1341 gst_object_unref (sink);
1344 gst_object_unref (sink);
1346 /* Everything done here, go out of loop */
1349 /* Is renderer factory */
1351 if (!_setup_renderer (self, self->renderer))
1354 /* subtitle_src==NULL means: use subtitle_sink ghostpad */
1355 if (!_link_renderer (self, self->renderer, NULL))
1358 /* Everything done here, go out of loop */
1363 if (G_UNLIKELY (l == NULL)) {
1364 GST_ELEMENT_WARNING (self, CORE, FAILED, (NULL),
1365 ("Failed to find any usable factories"));
1366 self->subtitle_error = TRUE;
1367 _setup_passthrough (self);
1368 do_async_done (self);
1372 /* Send segments to the renderer if necessary. These are not sent
1373 * outside this element because of the proxy pad event handler */
1374 if (self->video_segment.format != GST_FORMAT_UNDEFINED) {
1378 if (self->pre_colorspace) {
1379 sink = gst_element_get_static_pad (self->pre_colorspace, "sink");
1381 sink = _get_video_pad ((self->renderer) ? self->renderer : self->overlay);
1384 _generate_update_segment_event (sink, &self->video_segment, &event1);
1385 GST_DEBUG_OBJECT (self,
1386 "Pushing video update segment event: %" GST_PTR_FORMAT,
1387 gst_event_get_structure (event1));
1388 gst_pad_send_event (sink, event1);
1389 gst_object_unref (sink);
1392 if (self->subtitle_segment.format != GST_FORMAT_UNDEFINED) {
1397 sink = _get_sub_pad (self->renderer);
1399 sink = gst_element_get_static_pad (self->parser, "sink");
1401 _generate_update_segment_event (sink, &self->subtitle_segment, &event1);
1402 GST_DEBUG_OBJECT (self,
1403 "Pushing subtitle update segment event: %" GST_PTR_FORMAT,
1404 gst_event_get_structure (event1));
1405 gst_pad_send_event (sink, event1);
1406 gst_object_unref (sink);
1409 GST_DEBUG_OBJECT (self, "Everything worked, unblocking pads");
1410 unblock_video (self);
1411 unblock_subtitle (self);
1412 do_async_done (self);
1416 gst_plugin_feature_list_free (factories);
1417 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1419 return GST_PAD_PROBE_OK;
1422 static GstStateChangeReturn
1423 gst_subtitle_overlay_change_state (GstElement * element,
1424 GstStateChange transition)
1426 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (element);
1427 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1429 switch (transition) {
1430 case GST_STATE_CHANGE_NULL_TO_READY:
1431 GST_DEBUG_OBJECT (self, "State change NULL->READY");
1432 g_mutex_lock (self->factories_lock);
1433 if (G_UNLIKELY (!gst_subtitle_overlay_update_factory_list (self))) {
1434 g_mutex_unlock (self->factories_lock);
1435 return GST_STATE_CHANGE_FAILURE;
1437 g_mutex_unlock (self->factories_lock);
1439 GST_SUBTITLE_OVERLAY_LOCK (self);
1440 /* Set the internal pads to blocking */
1442 block_subtitle (self);
1443 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1445 case GST_STATE_CHANGE_READY_TO_PAUSED:
1446 GST_DEBUG_OBJECT (self, "State change READY->PAUSED");
1447 gst_segment_init (&self->video_segment, GST_FORMAT_UNDEFINED);
1448 gst_segment_init (&self->subtitle_segment, GST_FORMAT_UNDEFINED);
1450 self->fps_n = self->fps_d = 0;
1452 self->subtitle_flush = FALSE;
1453 self->subtitle_error = FALSE;
1455 self->downstream_chain_error = FALSE;
1457 do_async_start (self);
1458 ret = GST_STATE_CHANGE_ASYNC;
1461 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1462 GST_DEBUG_OBJECT (self, "State change PAUSED->PLAYING");
1468 GstStateChangeReturn bret;
1470 bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1471 GST_DEBUG_OBJECT (self, "Base class state changed returned: %d", bret);
1472 if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
1474 else if (bret == GST_STATE_CHANGE_ASYNC)
1476 else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
1477 do_async_done (self);
1482 switch (transition) {
1483 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1484 GST_DEBUG_OBJECT (self, "State change PLAYING->PAUSED");
1486 case GST_STATE_CHANGE_PAUSED_TO_READY:
1487 GST_DEBUG_OBJECT (self, "State change PAUSED->READY");
1489 /* Set the pads back to blocking state */
1490 GST_SUBTITLE_OVERLAY_LOCK (self);
1492 block_subtitle (self);
1493 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1495 do_async_done (self);
1498 case GST_STATE_CHANGE_READY_TO_NULL:
1499 GST_DEBUG_OBJECT (self, "State change READY->NULL");
1501 GST_SUBTITLE_OVERLAY_LOCK (self);
1502 gst_caps_replace (&self->subcaps, NULL);
1504 /* Unlink ghost pads */
1505 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
1506 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->video_sinkpad), NULL);
1507 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad),
1511 unblock_video (self);
1512 unblock_subtitle (self);
1514 /* Remove elements */
1515 self->silent_property = NULL;
1516 _remove_element (self, &self->post_colorspace);
1517 _remove_element (self, &self->overlay);
1518 _remove_element (self, &self->parser);
1519 _remove_element (self, &self->renderer);
1520 _remove_element (self, &self->pre_colorspace);
1521 _remove_element (self, &self->passthrough_identity);
1522 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1533 gst_subtitle_overlay_handle_message (GstBin * bin, GstMessage * message)
1535 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (bin);
1537 if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ERROR) {
1538 GstObject *src = GST_MESSAGE_SRC (message);
1540 /* Convert error messages from the subtitle pipeline to
1541 * warnings and switch to passthrough mode */
1544 && gst_object_has_ancestor (src,
1545 GST_OBJECT_CAST (self->overlay))) || (self->parser
1546 && gst_object_has_ancestor (src,
1547 GST_OBJECT_CAST (self->parser))) || (self->renderer
1548 && gst_object_has_ancestor (src,
1549 GST_OBJECT_CAST (self->renderer))))) {
1551 gchar *debug = NULL;
1554 gst_message_parse_error (message, &err, &debug);
1555 GST_DEBUG_OBJECT (self,
1556 "Got error message from subtitle element %s: %s (%s)",
1557 GST_MESSAGE_SRC_NAME (message), GST_STR_NULL (err->message),
1558 GST_STR_NULL (debug));
1560 wmsg = gst_message_new_warning (src, err, debug);
1561 gst_message_unref (message);
1566 GST_SUBTITLE_OVERLAY_LOCK (self);
1567 self->subtitle_error = TRUE;
1569 block_subtitle (self);
1571 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1575 GST_BIN_CLASS (parent_class)->handle_message (bin, message);
1579 gst_subtitle_overlay_get_property (GObject * object, guint prop_id,
1580 GValue * value, GParamSpec * pspec)
1582 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (object);
1586 g_value_set_boolean (value, self->silent);
1588 case PROP_FONT_DESC:
1589 GST_SUBTITLE_OVERLAY_LOCK (self);
1590 g_value_set_string (value, self->font_desc);
1591 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1593 case PROP_SUBTITLE_ENCODING:
1594 GST_SUBTITLE_OVERLAY_LOCK (self);
1595 g_value_set_string (value, self->encoding);
1596 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1599 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1605 gst_subtitle_overlay_set_property (GObject * object, guint prop_id,
1606 const GValue * value, GParamSpec * pspec)
1608 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY_CAST (object);
1612 GST_SUBTITLE_OVERLAY_LOCK (self);
1613 self->silent = g_value_get_boolean (value);
1614 if (self->silent_property) {
1615 gboolean silent = self->silent;
1617 if (self->silent_property_invert)
1621 g_object_set (self->overlay, self->silent_property, silent, NULL);
1622 else if (self->renderer)
1623 g_object_set (self->renderer, self->silent_property, silent, NULL);
1625 block_subtitle (self);
1628 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1630 case PROP_FONT_DESC:
1631 GST_SUBTITLE_OVERLAY_LOCK (self);
1632 g_free (self->font_desc);
1633 self->font_desc = g_value_dup_string (value);
1635 && _has_property_with_type (G_OBJECT (self->overlay), "font-desc",
1637 g_object_set (self->overlay, "font-desc", self->font_desc, NULL);
1638 else if (self->renderer
1639 && _has_property_with_type (G_OBJECT (self->renderer), "font-desc",
1641 g_object_set (self->renderer, "font-desc", self->font_desc, NULL);
1642 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1644 case PROP_SUBTITLE_ENCODING:
1645 GST_SUBTITLE_OVERLAY_LOCK (self);
1646 g_free (self->encoding);
1647 self->encoding = g_value_dup_string (value);
1649 && _has_property_with_type (G_OBJECT (self->renderer),
1650 "subtitle-encoding", G_TYPE_STRING))
1651 g_object_set (self->renderer, "subtitle-encoding", self->encoding,
1654 && _has_property_with_type (G_OBJECT (self->parser),
1655 "subtitle-encoding", G_TYPE_STRING))
1656 g_object_set (self->parser, "subtitle-encoding", self->encoding, NULL);
1657 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1660 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1666 gst_subtitle_overlay_class_init (GstSubtitleOverlayClass * klass)
1668 GObjectClass *gobject_class = (GObjectClass *) klass;
1669 GstElementClass *element_class = (GstElementClass *) klass;
1670 GstBinClass *bin_class = (GstBinClass *) klass;
1672 gobject_class->finalize = gst_subtitle_overlay_finalize;
1673 gobject_class->set_property = gst_subtitle_overlay_set_property;
1674 gobject_class->get_property = gst_subtitle_overlay_get_property;
1676 g_object_class_install_property (gobject_class, PROP_SILENT,
1677 g_param_spec_boolean ("silent",
1679 "Whether to show subtitles", FALSE,
1680 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1682 g_object_class_install_property (gobject_class, PROP_FONT_DESC,
1683 g_param_spec_string ("font-desc",
1684 "Subtitle font description",
1685 "Pango font description of font "
1686 "to be used for subtitle rendering", NULL,
1687 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1689 g_object_class_install_property (gobject_class, PROP_SUBTITLE_ENCODING,
1690 g_param_spec_string ("subtitle-encoding", "subtitle encoding",
1691 "Encoding to assume if input subtitles are not in UTF-8 encoding. "
1692 "If not set, the GST_SUBTITLE_ENCODING environment variable will "
1693 "be checked for an encoding to use. If that is not set either, "
1694 "ISO-8859-15 will be assumed.", NULL,
1695 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1697 gst_element_class_add_pad_template (element_class,
1698 gst_static_pad_template_get (&srctemplate));
1700 gst_element_class_add_pad_template (element_class,
1701 gst_static_pad_template_get (&video_sinktemplate));
1702 gst_element_class_add_pad_template (element_class,
1703 gst_static_pad_template_get (&subtitle_sinktemplate));
1705 gst_element_class_set_static_metadata (element_class, "Subtitle Overlay",
1706 "Video/Overlay/Subtitle",
1707 "Overlays a video stream with subtitles",
1708 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
1710 element_class->change_state =
1711 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_change_state);
1713 bin_class->handle_message =
1714 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_handle_message);
1717 static GstFlowReturn
1718 gst_subtitle_overlay_src_proxy_chain (GstPad * proxypad, GstObject * parent,
1722 GstSubtitleOverlay *self;
1725 ghostpad = GST_PAD_CAST (parent);
1726 if (G_UNLIKELY (!ghostpad)) {
1727 gst_buffer_unref (buffer);
1728 return GST_FLOW_ERROR;
1730 self = GST_SUBTITLE_OVERLAY_CAST (gst_pad_get_parent (ghostpad));
1731 if (G_UNLIKELY (!self || self->srcpad != ghostpad)) {
1732 gst_buffer_unref (buffer);
1733 gst_object_unref (ghostpad);
1734 return GST_FLOW_ERROR;
1737 ret = gst_proxy_pad_chain_default (proxypad, parent, buffer);
1739 if (IS_VIDEO_CHAIN_IGNORE_ERROR (ret)) {
1740 GST_ERROR_OBJECT (self, "Downstream chain error: %s",
1741 gst_flow_get_name (ret));
1742 self->downstream_chain_error = TRUE;
1745 gst_object_unref (self);
1751 gst_subtitle_overlay_src_proxy_event (GstPad * proxypad, GstObject * parent,
1754 GstPad *ghostpad = NULL;
1755 GstSubtitleOverlay *self = NULL;
1756 gboolean ret = FALSE;
1757 const GstStructure *s;
1759 ghostpad = GST_PAD_CAST (parent);
1760 if (G_UNLIKELY (!ghostpad))
1762 self = GST_SUBTITLE_OVERLAY_CAST (gst_pad_get_parent (ghostpad));
1763 if (G_UNLIKELY (!self || self->srcpad != ghostpad))
1766 s = gst_event_get_structure (event);
1767 if (s && gst_structure_id_has_field (s, _subtitle_overlay_event_marker_id)) {
1768 GST_DEBUG_OBJECT (ghostpad,
1769 "Dropping event with marker: %" GST_PTR_FORMAT,
1770 gst_event_get_structure (event));
1771 gst_event_unref (event);
1775 ret = gst_pad_event_default (proxypad, parent, event);
1781 gst_event_unref (event);
1783 gst_object_unref (self);
1789 gst_subtitle_overlay_video_sink_setcaps (GstSubtitleOverlay * self,
1793 gboolean ret = TRUE;
1796 GST_DEBUG_OBJECT (self, "Setting caps: %" GST_PTR_FORMAT, caps);
1798 if (!gst_video_info_from_caps (&info, caps)) {
1799 GST_ERROR_OBJECT (self, "Failed to parse caps");
1801 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1805 target = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (self->video_sinkpad));
1807 GST_SUBTITLE_OVERLAY_LOCK (self);
1809 if (!target || !gst_pad_query_accept_caps (target, caps)) {
1810 GST_DEBUG_OBJECT (target, "Target did not accept caps -- reconfiguring");
1812 block_subtitle (self);
1816 if (self->fps_n != info.fps_n || self->fps_d != info.fps_d) {
1817 GST_DEBUG_OBJECT (self, "New video fps: %d/%d", info.fps_n, info.fps_d);
1818 self->fps_n = info.fps_n;
1819 self->fps_d = info.fps_d;
1820 gst_subtitle_overlay_set_fps (self);
1822 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1825 gst_object_unref (target);
1833 gst_subtitle_overlay_video_sink_event (GstPad * pad, GstObject * parent,
1836 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (parent);
1839 switch (GST_EVENT_TYPE (event)) {
1840 case GST_EVENT_FLUSH_STOP:
1842 GST_DEBUG_OBJECT (pad,
1843 "Resetting video segment because of flush-stop event");
1844 gst_segment_init (&self->video_segment, GST_FORMAT_UNDEFINED);
1845 self->fps_n = self->fps_d = 0;
1848 case GST_EVENT_CAPS:
1852 gst_event_parse_caps (event, &caps);
1853 ret = gst_subtitle_overlay_video_sink_setcaps (self, caps);
1862 ret = gst_pad_event_default (pad, parent, gst_event_ref (event));
1864 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
1865 GST_DEBUG_OBJECT (pad, "segment event: %" GST_PTR_FORMAT, event);
1866 gst_event_copy_segment (event, &self->video_segment);
1868 if (self->video_segment.format != GST_FORMAT_TIME)
1869 goto invalid_format;
1873 gst_event_unref (event);
1880 GST_ERROR_OBJECT (pad, "Segment event in non-time format: %s",
1881 gst_format_get_name (self->video_segment.format));
1887 static GstFlowReturn
1888 gst_subtitle_overlay_video_sink_chain (GstPad * pad, GstObject * parent,
1891 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (parent);
1892 GstFlowReturn ret = gst_proxy_pad_chain_default (pad, parent, buffer);
1894 if (G_UNLIKELY (self->downstream_chain_error) || self->passthrough_identity) {
1896 } else if (IS_VIDEO_CHAIN_IGNORE_ERROR (ret)) {
1897 GST_DEBUG_OBJECT (self, "Subtitle renderer produced chain error: %s",
1898 gst_flow_get_name (ret));
1899 GST_SUBTITLE_OVERLAY_LOCK (self);
1900 self->subtitle_error = TRUE;
1901 block_subtitle (self);
1903 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1911 static GstFlowReturn
1912 gst_subtitle_overlay_subtitle_sink_chain (GstPad * pad, GstObject * parent,
1915 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (parent);
1917 if (self->subtitle_error) {
1918 gst_buffer_unref (buffer);
1921 GstFlowReturn ret = gst_proxy_pad_chain_default (pad, parent, buffer);
1923 if (IS_SUBTITLE_CHAIN_IGNORE_ERROR (ret)) {
1924 GST_DEBUG_OBJECT (self, "Subtitle chain error: %s",
1925 gst_flow_get_name (ret));
1926 GST_SUBTITLE_OVERLAY_LOCK (self);
1927 self->subtitle_error = TRUE;
1928 block_subtitle (self);
1930 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1940 gst_subtitle_overlay_subtitle_sink_getcaps (GstPad * pad, GstCaps * filter)
1942 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
1945 g_mutex_lock (self->factories_lock);
1946 if (G_UNLIKELY (!gst_subtitle_overlay_update_factory_list (self)))
1947 ret = gst_caps_new_empty ();
1950 gst_caps_intersect_full (filter, self->factory_caps,
1951 GST_CAPS_INTERSECT_FIRST);
1953 ret = gst_caps_ref (self->factory_caps);
1954 g_mutex_unlock (self->factories_lock);
1956 GST_DEBUG_OBJECT (pad, "Returning subtitle caps %" GST_PTR_FORMAT, ret);
1958 gst_object_unref (self);
1964 gst_subtitle_overlay_subtitle_sink_setcaps (GstSubtitleOverlay * self,
1967 gboolean ret = TRUE;
1968 GstPad *target = NULL;;
1970 GST_DEBUG_OBJECT (self, "Setting caps: %" GST_PTR_FORMAT, caps);
1973 gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (self->subtitle_sinkpad));
1975 GST_SUBTITLE_OVERLAY_LOCK (self);
1976 gst_caps_replace (&self->subcaps, caps);
1978 if (target && gst_pad_query_accept_caps (target, caps)) {
1979 GST_DEBUG_OBJECT (self, "Target accepts caps");
1980 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1984 GST_DEBUG_OBJECT (self, "Target did not accept caps");
1986 self->subtitle_error = FALSE;
1987 block_subtitle (self);
1989 GST_SUBTITLE_OVERLAY_UNLOCK (self);
1993 gst_object_unref (target);
1998 static GstPadLinkReturn
1999 gst_subtitle_overlay_subtitle_sink_link (GstPad * pad, GstPad * peer)
2001 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (gst_pad_get_parent (pad));
2004 GST_DEBUG_OBJECT (pad, "Linking pad to peer %" GST_PTR_FORMAT, peer);
2006 caps = gst_pad_get_current_caps (peer);
2008 caps = gst_pad_query_caps (peer, NULL);
2009 if (!gst_caps_is_fixed (caps)) {
2010 gst_caps_unref (caps);
2016 GST_SUBTITLE_OVERLAY_LOCK (self);
2017 GST_DEBUG_OBJECT (pad, "Have fixed peer caps: %" GST_PTR_FORMAT, caps);
2018 gst_caps_replace (&self->subcaps, caps);
2020 self->subtitle_error = FALSE;
2022 block_subtitle (self);
2024 GST_SUBTITLE_OVERLAY_UNLOCK (self);
2025 gst_caps_unref (caps);
2028 gst_object_unref (self);
2030 return GST_PAD_LINK_OK;
2034 gst_subtitle_overlay_subtitle_sink_unlink (GstPad * pad)
2036 GstSubtitleOverlay *self =
2037 GST_SUBTITLE_OVERLAY (gst_object_ref (GST_PAD_PARENT (pad)));
2039 /* FIXME: Can't use gst_pad_get_parent() here because this is called with
2040 * the object lock from state changes
2043 GST_DEBUG_OBJECT (pad, "Pad unlinking");
2044 gst_caps_replace (&self->subcaps, NULL);
2046 GST_SUBTITLE_OVERLAY_LOCK (self);
2047 self->subtitle_error = FALSE;
2049 block_subtitle (self);
2051 GST_SUBTITLE_OVERLAY_UNLOCK (self);
2053 gst_object_unref (self);
2057 gst_subtitle_overlay_subtitle_sink_event (GstPad * pad, GstObject * parent,
2060 GstSubtitleOverlay *self = GST_SUBTITLE_OVERLAY (parent);
2063 GST_DEBUG_OBJECT (pad, "Got event %" GST_PTR_FORMAT, event);
2065 if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_DOWNSTREAM_OOB &&
2066 gst_event_has_name (event, "playsink-custom-subtitle-flush")) {
2067 GST_DEBUG_OBJECT (pad, "Custom subtitle flush event");
2068 GST_SUBTITLE_OVERLAY_LOCK (self);
2069 self->subtitle_flush = TRUE;
2070 self->subtitle_error = FALSE;
2071 block_subtitle (self);
2073 GST_SUBTITLE_OVERLAY_UNLOCK (self);
2075 gst_event_unref (event);
2081 switch (GST_EVENT_TYPE (event)) {
2082 case GST_EVENT_CAPS:
2086 gst_event_parse_caps (event, &caps);
2087 ret = gst_subtitle_overlay_subtitle_sink_setcaps (self, caps);
2092 case GST_EVENT_FLUSH_STOP:
2093 GST_DEBUG_OBJECT (pad,
2094 "Resetting subtitle segment because of flush-stop");
2095 gst_segment_init (&self->subtitle_segment, GST_FORMAT_UNDEFINED);
2097 case GST_EVENT_FLUSH_START:
2098 case GST_EVENT_SEGMENT:
2101 GstStructure *structure;
2103 /* Add our event marker to make sure no events from here go ever outside
2104 * the element, they're only interesting for our internal elements */
2105 event = GST_EVENT_CAST (gst_event_make_writable (event));
2106 structure = gst_event_writable_structure (event);
2108 gst_structure_id_set (structure, _subtitle_overlay_event_marker_id,
2109 G_TYPE_BOOLEAN, TRUE, NULL);
2116 ret = gst_pad_event_default (pad, parent, gst_event_ref (event));
2118 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2119 const GstSegment *eventsegment;
2120 GST_DEBUG_OBJECT (pad, "segment event: %" GST_PTR_FORMAT, event);
2122 gst_event_parse_segment (event, &eventsegment);
2124 if (eventsegment->format == GST_FORMAT_TIME) {
2125 gst_event_copy_segment (event, &self->subtitle_segment);
2128 gboolean res = FALSE;
2130 gint64 tstop = GST_CLOCK_TIME_NONE;
2131 gint64 tposition = 0;
2132 gint64 tduration = 0;
2135 GstFormat format = eventsegment->format;
2137 GST_DEBUG_OBJECT (pad, "Subtitle newsegment event (%s) not in TIME "
2138 "format, converting", gst_format_get_name (format));
2139 peer = gst_pad_get_peer (pad);
2143 _pad_query_convert_to_time (peer, format, eventsegment->start,
2146 && _pad_query_convert_to_time (peer, format, eventsegment->stop,
2149 && _pad_query_convert_to_time (peer, format, eventsegment->position,
2152 && _pad_query_convert_to_time (peer, format, eventsegment->base,
2155 && _pad_query_convert_to_time (peer, format, eventsegment->time,
2158 && _pad_query_convert_to_time (peer, format, eventsegment->duration,
2161 gst_object_unref (peer);
2166 tstop = GST_CLOCK_TIME_NONE;
2168 tduration = GST_CLOCK_TIME_NONE;
2173 gst_segment_init (&self->subtitle_segment, GST_FORMAT_TIME);
2174 self->subtitle_segment.start = tstart;
2175 self->subtitle_segment.stop = tstop;
2176 self->subtitle_segment.base = tbase;
2177 self->subtitle_segment.time = ttime;
2178 self->subtitle_segment.position = tposition;
2179 self->subtitle_segment.duration = tduration;
2181 GST_DEBUG_OBJECT (pad, "New subtitle segment: %" GST_SEGMENT_FORMAT,
2182 &self->subtitle_segment);
2184 gst_event_unref (event);
2191 gst_subtitle_overlay_subtitle_sink_query (GstPad * pad, GstObject * parent,
2196 switch (GST_QUERY_TYPE (query)) {
2197 case GST_QUERY_ACCEPT_CAPS:
2199 GstCaps *caps, *othercaps;
2201 gst_query_parse_accept_caps (query, &caps);
2202 othercaps = gst_subtitle_overlay_subtitle_sink_getcaps (pad, NULL);
2203 ret = gst_caps_is_subset (caps, othercaps);
2204 gst_caps_unref (othercaps);
2205 gst_query_set_accept_caps_result (query, ret);
2209 case GST_QUERY_CAPS:
2211 GstCaps *filter, *caps;
2213 gst_query_parse_caps (query, &filter);
2214 caps = gst_subtitle_overlay_subtitle_sink_getcaps (pad, filter);
2215 gst_query_set_caps_result (query, caps);
2216 gst_caps_unref (caps);
2221 ret = gst_pad_query_default (pad, parent, query);
2229 gst_subtitle_overlay_init (GstSubtitleOverlay * self)
2231 GstPadTemplate *templ;
2232 GstPad *proxypad = NULL;
2234 self->lock = g_mutex_new ();
2235 self->factories_lock = g_mutex_new ();
2237 templ = gst_static_pad_template_get (&srctemplate);
2238 self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", templ);
2239 gst_object_unref (templ);
2242 GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD (self->srcpad)));
2243 gst_pad_set_event_function (proxypad,
2244 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_src_proxy_event));
2245 gst_pad_set_chain_function (proxypad,
2246 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_src_proxy_chain));
2247 gst_object_unref (proxypad);
2249 gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
2251 templ = gst_static_pad_template_get (&video_sinktemplate);
2252 self->video_sinkpad =
2253 gst_ghost_pad_new_no_target_from_template ("video_sink", templ);
2254 gst_object_unref (templ);
2255 gst_pad_set_event_function (self->video_sinkpad,
2256 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_video_sink_event));
2257 gst_pad_set_chain_function (self->video_sinkpad,
2258 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_video_sink_chain));
2261 GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD
2262 (self->video_sinkpad)));
2263 self->video_block_pad = proxypad;
2264 gst_object_unref (proxypad);
2265 gst_element_add_pad (GST_ELEMENT_CAST (self), self->video_sinkpad);
2267 templ = gst_static_pad_template_get (&subtitle_sinktemplate);
2268 self->subtitle_sinkpad =
2269 gst_ghost_pad_new_no_target_from_template ("subtitle_sink", templ);
2270 gst_object_unref (templ);
2271 gst_pad_set_link_function (self->subtitle_sinkpad,
2272 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_link));
2273 gst_pad_set_unlink_function (self->subtitle_sinkpad,
2274 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_unlink));
2275 gst_pad_set_event_function (self->subtitle_sinkpad,
2276 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_event));
2277 gst_pad_set_query_function (self->subtitle_sinkpad,
2278 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_query));
2279 gst_pad_set_chain_function (self->subtitle_sinkpad,
2280 GST_DEBUG_FUNCPTR (gst_subtitle_overlay_subtitle_sink_chain));
2283 GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD
2284 (self->subtitle_sinkpad)));
2285 self->subtitle_block_pad = proxypad;
2286 gst_object_unref (proxypad);
2288 gst_element_add_pad (GST_ELEMENT_CAST (self), self->subtitle_sinkpad);
2295 gst_subtitle_overlay_plugin_init (GstPlugin * plugin)
2297 GST_DEBUG_CATEGORY_INIT (subtitle_overlay_debug, "subtitleoverlay", 0,
2298 "Subtitle Overlay");
2300 _subtitle_overlay_event_marker_id =
2301 g_quark_from_static_string ("gst-subtitle-overlay-event-marker");
2303 return gst_element_register (plugin, "subtitleoverlay", GST_RANK_NONE,
2304 GST_TYPE_SUBTITLE_OVERLAY);