2 * Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
3 * Copyright (C) <2011> Vincent Penquerch <vincent.penquerch@collabora.co.uk>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
25 #include "gstplaysinkconvertbin.h"
27 #include <gst/pbutils/pbutils.h>
28 #include <gst/gst-i18n-plugin.h>
30 GST_DEBUG_CATEGORY_STATIC (gst_play_sink_convert_bin_debug);
31 #define GST_CAT_DEFAULT gst_play_sink_convert_bin_debug
33 #define parent_class gst_play_sink_convert_bin_parent_class
35 static gboolean gst_play_sink_convert_bin_sink_setcaps (GstPlaySinkConvertBin *
36 self, GstCaps * caps);
38 G_DEFINE_TYPE (GstPlaySinkConvertBin, gst_play_sink_convert_bin, GST_TYPE_BIN);
40 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
45 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
51 is_raw_caps (GstCaps * caps, gboolean audio)
56 const gchar *prefix = audio ? "audio/x-raw" : "video/x-raw";
58 n = gst_caps_get_size (caps);
59 for (i = 0; i < n; i++) {
60 s = gst_caps_get_structure (caps, i);
61 name = gst_structure_get_name (s);
62 if (g_str_equal (name, prefix))
70 gst_play_sink_convert_bin_post_missing_element_message (GstPlaySinkConvertBin *
71 self, const gchar * name)
75 msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
76 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
80 distribute_running_time (GstElement * element, const GstSegment * segment)
85 pad = gst_element_get_static_pad (element, "sink");
87 gst_pad_send_event (pad, gst_event_new_flush_start ());
88 gst_pad_send_event (pad, gst_event_new_flush_stop (FALSE));
90 if (segment->format != GST_FORMAT_UNDEFINED) {
91 event = gst_event_new_segment (segment);
92 gst_pad_send_event (pad, event);
95 gst_object_unref (pad);
99 gst_play_sink_convert_bin_add_conversion_element (GstPlaySinkConvertBin * self,
102 self->conversion_elements = g_list_append (self->conversion_elements, el);
103 gst_bin_add (GST_BIN (self), gst_object_ref (el));
107 gst_play_sink_convert_bin_add_conversion_element_factory (GstPlaySinkConvertBin
108 * self, const char *factory, const char *name)
112 el = gst_element_factory_make (factory, name);
114 gst_play_sink_convert_bin_post_missing_element_message (self, factory);
115 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
116 (_("Missing element '%s' - check your GStreamer installation."),
118 (self->audio ? "audio rendering might fail" :
119 "video rendering might fail"));
121 gst_play_sink_convert_bin_add_conversion_element (self, el);
127 gst_play_sink_convert_bin_add_identity (GstPlaySinkConvertBin * self)
132 self->identity = gst_element_factory_make ("identity", "identity");
133 if (self->identity == NULL) {
134 gst_play_sink_convert_bin_post_missing_element_message (self, "identity");
135 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
136 (_("Missing element '%s' - check your GStreamer installation."),
137 "identity"), (self->audio ?
138 "audio rendering might fail" : "video rendering might fail")
142 g_object_set (self->identity, "silent", TRUE, "signal-handoffs", FALSE,
144 gst_bin_add (GST_BIN_CAST (self), self->identity);
149 gst_play_sink_convert_bin_set_targets (GstPlaySinkConvertBin * self,
150 gboolean passthrough)
153 GstElement *head, *tail;
155 GST_DEBUG_OBJECT (self, "Setting pad targets with passthrough %d",
157 if (self->conversion_elements == NULL || passthrough) {
158 GST_DEBUG_OBJECT (self, "no conversion elements, using identity (%p) as "
159 "head/tail", self->identity);
161 GST_WARNING_OBJECT (self,
162 "Doing passthrough as no converter elements were added");
164 head = tail = self->identity;
166 head = GST_ELEMENT (g_list_first (self->conversion_elements)->data);
167 tail = GST_ELEMENT (g_list_last (self->conversion_elements)->data);
168 GST_DEBUG_OBJECT (self, "conversion elements in use, picking "
169 "head:%s and tail:%s", GST_OBJECT_NAME (head), GST_OBJECT_NAME (tail));
172 g_return_if_fail (head != NULL);
173 g_return_if_fail (tail != NULL);
175 pad = gst_element_get_static_pad (head, "sink");
176 GST_DEBUG_OBJECT (self, "Ghosting bin sink pad to %" GST_PTR_FORMAT, pad);
177 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), pad);
178 gst_object_unref (pad);
180 pad = gst_element_get_static_pad (tail, "src");
181 GST_DEBUG_OBJECT (self, "Ghosting bin src pad to %" GST_PTR_FORMAT, pad);
182 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), pad);
183 gst_object_unref (pad);
187 gst_play_sink_convert_bin_remove_element (GstElement * element,
188 GstPlaySinkConvertBin * self)
190 gst_element_set_state (element, GST_STATE_NULL);
191 gst_object_unref (element);
192 gst_bin_remove (GST_BIN_CAST (self), element);
196 gst_play_sink_convert_bin_on_element_added (GstElement * element,
197 GstPlaySinkConvertBin * self)
199 gst_element_sync_state_with_parent (element);
200 distribute_running_time (element, &self->segment);
203 static GstPadProbeReturn
204 pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
206 GstPlaySinkConvertBin *self = user_data;
211 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
212 GST_DEBUG_OBJECT (self, "Pad blocked");
214 /* There must be a peer at this point */
215 peer = gst_pad_get_peer (self->sinkpad);
216 caps = gst_pad_get_current_caps (peer);
218 caps = gst_pad_query_caps (peer, NULL);
219 gst_object_unref (peer);
221 raw = is_raw_caps (caps, self->audio);
222 GST_DEBUG_OBJECT (self, "Caps %" GST_PTR_FORMAT " are raw: %d", caps, raw);
223 gst_caps_unref (caps);
225 if (raw == self->raw)
229 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
230 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
233 GST_DEBUG_OBJECT (self, "Switching to raw conversion pipeline");
235 if (self->conversion_elements)
236 g_list_foreach (self->conversion_elements,
237 (GFunc) gst_play_sink_convert_bin_on_element_added, self);
240 GST_DEBUG_OBJECT (self, "Switch to passthrough pipeline");
242 gst_play_sink_convert_bin_on_element_added (self->identity, self);
245 gst_play_sink_convert_bin_set_targets (self, !raw);
248 self->sink_proxypad_block_id = 0;
249 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
251 return GST_PAD_PROBE_REMOVE;
255 gst_play_sink_convert_bin_sink_event (GstPad * pad, GstObject * parent,
258 GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN (parent);
261 switch (GST_EVENT_TYPE (event)) {
266 gst_event_parse_caps (event, &caps);
267 ret = gst_play_sink_convert_bin_sink_setcaps (self, caps);
274 ret = gst_pad_event_default (pad, parent, gst_event_ref (event));
276 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
279 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
280 gst_event_copy_segment (event, &seg);
282 GST_DEBUG_OBJECT (self, "Segment before %" GST_SEGMENT_FORMAT,
285 GST_DEBUG_OBJECT (self, "Segment after %" GST_SEGMENT_FORMAT,
287 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
288 } else if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
289 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
290 GST_DEBUG_OBJECT (self, "Resetting segment");
291 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
292 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
295 gst_event_unref (event);
301 block_proxypad (GstPlaySinkConvertBin * self)
303 if (self->sink_proxypad_block_id == 0) {
304 self->sink_proxypad_block_id =
305 gst_pad_add_probe (self->sink_proxypad,
306 GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, pad_blocked_cb, self, NULL);
311 unblock_proxypad (GstPlaySinkConvertBin * self)
313 if (self->sink_proxypad_block_id != 0) {
314 gst_pad_remove_probe (self->sink_proxypad, self->sink_proxypad_block_id);
315 self->sink_proxypad_block_id = 0;
320 gst_play_sink_convert_bin_sink_setcaps (GstPlaySinkConvertBin * self,
325 gboolean reconfigure = FALSE;
328 GST_DEBUG_OBJECT (self, "setcaps");
329 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
330 s = gst_caps_get_structure (caps, 0);
331 name = gst_structure_get_name (s);
334 raw = g_str_equal (name, "audio/x-raw");
336 raw = g_str_equal (name, "video/x-raw");
339 GST_DEBUG_OBJECT (self, "raw %d, self->raw %d, blocked %d",
340 raw, self->raw, gst_pad_is_blocked (self->sink_proxypad));
343 if (!gst_pad_is_blocked (self->sink_proxypad)) {
344 GstPad *target = gst_ghost_pad_get_target (GST_GHOST_PAD (self->sinkpad));
346 if (!self->raw || (target && !gst_pad_query_accept_caps (target, caps))) {
348 GST_DEBUG_OBJECT (self, "Changing caps from non-raw to raw");
350 GST_DEBUG_OBJECT (self, "Changing caps in an incompatible way");
353 block_proxypad (self);
357 gst_object_unref (target);
360 if (self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
361 GST_DEBUG_OBJECT (self, "Changing caps from raw to non-raw");
363 block_proxypad (self);
367 /* Otherwise the setcaps below fails */
369 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
370 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
373 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
375 GST_DEBUG_OBJECT (self, "Setting sink caps %" GST_PTR_FORMAT, caps);
381 gst_play_sink_convert_bin_getcaps (GstPad * pad, GstCaps * filter)
383 GstPlaySinkConvertBin *self =
384 GST_PLAY_SINK_CONVERT_BIN (gst_pad_get_parent (pad));
386 GstPad *otherpad, *peer;
388 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
389 if (pad == self->srcpad) {
390 otherpad = self->sinkpad;
391 } else if (pad == self->sinkpad) {
392 otherpad = self->srcpad;
394 GST_ERROR_OBJECT (pad, "Not one of our pads");
399 peer = gst_pad_get_peer (otherpad);
402 GstCaps *downstream_filter = NULL;
404 /* Add all the caps that we can convert to to the filter caps,
405 * otherwise downstream might just return EMPTY caps because
406 * it doesn't handle the filter caps but we could still convert
409 downstream_filter = gst_caps_copy (filter);
411 gst_caps_merge (downstream_filter,
412 gst_caps_ref (self->converter_caps));
415 peer_caps = gst_pad_query_caps (peer, downstream_filter);
416 gst_object_unref (peer);
417 if (self->converter_caps && is_raw_caps (peer_caps, self->audio)) {
418 ret = gst_caps_merge (peer_caps, gst_caps_ref (self->converter_caps));
423 ret = gst_caps_ref (self->converter_caps);
426 ret = gst_caps_new_any ();
428 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
430 gst_object_unref (self);
433 GstCaps *intersection =
434 gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
435 gst_caps_unref (ret);
439 GST_DEBUG_OBJECT (pad, "Returning caps %" GST_PTR_FORMAT, ret);
445 gst_play_sink_convert_bin_acceptcaps (GstPad * pad, GstCaps * caps)
447 GstCaps *allowed_caps;
450 allowed_caps = gst_pad_query_caps (pad, NULL);
451 ret = gst_caps_is_subset (caps, allowed_caps);
452 gst_caps_unref (allowed_caps);
458 gst_play_sink_convert_bin_query (GstPad * pad, GstObject * parent,
461 gboolean res = FALSE;
463 switch (GST_QUERY_TYPE (query)) {
464 case GST_QUERY_ACCEPT_CAPS:
468 gst_query_parse_accept_caps (query, &caps);
469 gst_query_set_accept_caps_result (query,
470 gst_play_sink_convert_bin_acceptcaps (pad, caps));
476 GstCaps *filter, *caps;
478 gst_query_parse_caps (query, &filter);
479 caps = gst_play_sink_convert_bin_getcaps (pad, filter);
480 gst_query_set_caps_result (query, caps);
481 gst_caps_unref (caps);
486 res = gst_pad_query_default (pad, parent, query);
493 gst_play_sink_convert_bin_remove_elements (GstPlaySinkConvertBin * self)
495 if (self->conversion_elements) {
496 g_list_foreach (self->conversion_elements,
497 (GFunc) gst_play_sink_convert_bin_remove_element, self);
498 g_list_free (self->conversion_elements);
499 self->conversion_elements = NULL;
501 if (self->converter_caps) {
502 gst_caps_unref (self->converter_caps);
503 self->converter_caps = NULL;
508 gst_play_sink_convert_bin_dispose (GObject * object)
510 GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (object);
512 gst_play_sink_convert_bin_remove_elements (self);
514 G_OBJECT_CLASS (parent_class)->dispose (object);
518 gst_play_sink_convert_bin_finalize (GObject * object)
520 GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (object);
522 gst_object_unref (self->sink_proxypad);
523 g_mutex_clear (&self->lock);
525 G_OBJECT_CLASS (parent_class)->finalize (object);
529 gst_play_sink_convert_bin_cache_converter_caps (GstPlaySinkConvertBin * self)
534 if (self->converter_caps) {
535 gst_caps_unref (self->converter_caps);
536 self->converter_caps = NULL;
539 if (!self->conversion_elements) {
540 GST_INFO_OBJECT (self, "No conversion elements");
544 head = GST_ELEMENT (g_list_first (self->conversion_elements)->data);
545 pad = gst_element_get_static_pad (head, "sink");
547 GST_WARNING_OBJECT (self, "No sink pad found");
551 self->converter_caps = gst_pad_query_caps (pad, NULL);
552 GST_INFO_OBJECT (self, "Converter caps: %" GST_PTR_FORMAT,
553 self->converter_caps);
555 gst_object_unref (pad);
558 static GstStateChangeReturn
559 gst_play_sink_convert_bin_change_state (GstElement * element,
560 GstStateChange transition)
562 GstStateChangeReturn ret;
563 GstPlaySinkConvertBin *self = GST_PLAY_SINK_CONVERT_BIN_CAST (element);
565 switch (transition) {
566 case GST_STATE_CHANGE_PAUSED_TO_READY:
567 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
568 unblock_proxypad (self);
569 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
571 case GST_STATE_CHANGE_READY_TO_PAUSED:
572 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
573 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
574 gst_play_sink_convert_bin_set_targets (self, TRUE);
576 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
582 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
583 if (ret == GST_STATE_CHANGE_FAILURE)
586 switch (transition) {
587 case GST_STATE_CHANGE_PAUSED_TO_READY:
588 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
589 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
590 gst_play_sink_convert_bin_set_targets (self, TRUE);
592 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
594 case GST_STATE_CHANGE_READY_TO_PAUSED:
595 GST_PLAY_SINK_CONVERT_BIN_LOCK (self);
596 unblock_proxypad (self);
597 GST_PLAY_SINK_CONVERT_BIN_UNLOCK (self);
607 gst_play_sink_convert_bin_class_init (GstPlaySinkConvertBinClass * klass)
609 GObjectClass *gobject_class;
610 GstElementClass *gstelement_class;
612 GST_DEBUG_CATEGORY_INIT (gst_play_sink_convert_bin_debug,
613 "playsinkconvertbin", 0, "play bin");
615 gobject_class = (GObjectClass *) klass;
616 gstelement_class = (GstElementClass *) klass;
618 gobject_class->dispose = gst_play_sink_convert_bin_dispose;
619 gobject_class->finalize = gst_play_sink_convert_bin_finalize;
621 gst_element_class_add_pad_template (gstelement_class,
622 gst_static_pad_template_get (&srctemplate));
623 gst_element_class_add_pad_template (gstelement_class,
624 gst_static_pad_template_get (&sinktemplate));
625 gst_element_class_set_static_metadata (gstelement_class,
626 "Player Sink Converter Bin", "Bin/Converter",
627 "Convenience bin for audio/video conversion",
628 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
630 gstelement_class->change_state =
631 GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_change_state);
635 gst_play_sink_convert_bin_init (GstPlaySinkConvertBin * self)
637 GstPadTemplate *templ;
639 g_mutex_init (&self->lock);
640 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
642 templ = gst_static_pad_template_get (&sinktemplate);
643 self->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", templ);
644 gst_pad_set_event_function (self->sinkpad,
645 GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_sink_event));
646 gst_pad_set_query_function (self->sinkpad,
647 GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_query));
649 self->sink_proxypad =
650 GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD (self->sinkpad)));
652 gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad);
653 gst_object_unref (templ);
655 templ = gst_static_pad_template_get (&srctemplate);
656 self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", templ);
657 gst_pad_set_query_function (self->srcpad,
658 GST_DEBUG_FUNCPTR (gst_play_sink_convert_bin_query));
659 gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
660 gst_object_unref (templ);
662 gst_play_sink_convert_bin_add_identity (self);