2 * Copyright (C) <2006> Edward Hervey <edward@fluendo.com>
3 * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 * Copyright (C) <2011> Hewlett-Packard Development Company, L.P.
5 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * SECTION:element-decodebin2
26 * #GstBin that auto-magically constructs a decoding pipeline using available
27 * decoders and demuxers via auto-plugging.
29 * decodebin2 is considered stable now and replaces the old #decodebin element.
30 * #uridecodebin uses decodebin2 internally and is often more convenient to
31 * use, as it creates a suitable source element as well.
34 /* Implementation notes:
36 * The following section describes how decodebin2 works internally.
38 * The first part of decodebin2 is its typefind element, which tries
39 * to determine the media type of the input stream. If the type is found
40 * autoplugging starts.
42 * decodebin2 internally organizes the elements it autoplugged into GstDecodeChains
43 * and GstDecodeGroups. A decode chain is a single chain of decoding, this
44 * means that if decodebin2 every autoplugs an element with two+ srcpads
45 * (e.g. a demuxer) this will end the chain and everything following this
46 * demuxer will be put into decode groups below the chain. Otherwise,
47 * if an element has a single srcpad that outputs raw data the decode chain
48 * is ended too and a GstDecodePad is stored and blocked.
50 * A decode group combines a number of chains that are created by a
51 * demuxer element. All those chains are connected through a multiqueue to
52 * the demuxer. A new group for the same demuxer is only created if the
53 * demuxer has signaled no-more-pads, in which case all following pads
54 * create a new chain in the new group.
56 * This continues until the top-level decode chain is complete. A decode
57 * chain is complete if it either ends with a blocked endpad, if autoplugging
58 * stopped because no suitable plugins could be found or if the active group
59 * is complete. A decode group on the other hand is complete if all child
60 * chains are complete.
62 * If this happens at some point, all endpads of all active groups are exposed.
63 * For this decodebin2 adds the endpads, signals no-more-pads and then unblocks
64 * them. Now playback starts.
66 * If one of the chains that end on a endpad receives EOS decodebin2 checks
67 * if all chains and groups are drained. In that case everything goes into EOS.
68 * If there is a chain where the active group is drained but there exist next
69 * groups, the active group is hidden (endpads are removed) and the next group
70 * is exposed. This means that in some cases more pads may be created even
71 * after the initial no-more-pads signal. This happens for example with
72 * so-called "chained oggs", most commonly found among ogg/vorbis internet
75 * Note 1: If we're talking about blocked endpads this really means that the
76 * *target* pads of the endpads are blocked. Pads that are exposed to the outside
77 * should never ever be blocked!
79 * Note 2: If a group is complete and the parent's chain demuxer adds new pads
80 * but never signaled no-more-pads this additional pads will be ignored!
88 /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
89 * with newer GLib versions (>= 2.31.0) */
90 #define GLIB_DISABLE_DEPRECATION_WARNINGS
92 #include <gst/gst-i18n-plugin.h>
96 #include <gst/pbutils/pbutils.h>
98 #include "gstplay-marshal.h"
99 #include "gstplay-enum.h"
100 #include "gstplayback.h"
101 #include "gstrawcaps.h"
103 #include "gst/glib-compat-private.h"
105 /* generic templates */
106 static GstStaticPadTemplate decoder_bin_sink_template =
107 GST_STATIC_PAD_TEMPLATE ("sink",
110 GST_STATIC_CAPS_ANY);
112 static GstStaticPadTemplate decoder_bin_src_template =
113 GST_STATIC_PAD_TEMPLATE ("src%d",
116 GST_STATIC_CAPS_ANY);
118 GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug);
119 #define GST_CAT_DEFAULT gst_decode_bin_debug
121 typedef struct _GstPendingPad GstPendingPad;
122 typedef struct _GstDecodeElement GstDecodeElement;
123 typedef struct _GstDecodeChain GstDecodeChain;
124 typedef struct _GstDecodeGroup GstDecodeGroup;
125 typedef struct _GstDecodePad GstDecodePad;
126 typedef GstGhostPadClass GstDecodePadClass;
127 typedef struct _GstDecodeBin GstDecodeBin;
128 typedef struct _GstDecodeBin GstDecodeBin2;
129 typedef struct _GstDecodeBinClass GstDecodeBinClass;
131 #define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type())
132 #define GST_DECODE_BIN_CAST(obj) ((GstDecodeBin*)(obj))
133 #define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin))
134 #define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass))
135 #define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN))
136 #define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN))
141 * The opaque #DecodeBin2 data structure
145 GstBin bin; /* we extend GstBin */
148 GstCaps *caps; /* caps on which to stop decoding */
149 gchar *encoding; /* encoding of subtitles */
150 gboolean use_buffering; /* configure buffering on multiqueues */
153 guint max_size_bytes;
154 guint max_size_buffers;
155 guint64 max_size_time;
156 gboolean post_stream_topology;
158 GstElement *typefind; /* this holds the typefind object */
160 GMutex *expose_lock; /* Protects exposal and removal of groups */
161 GstDecodeChain *decode_chain; /* Top level decode chain */
162 gint nbpads; /* unique identifier for source pads */
164 GMutex *factories_lock;
165 guint32 factories_cookie; /* Cookie from last time when factories was updated */
166 GList *factories; /* factories we can use for selecting elements */
168 GMutex *subtitle_lock; /* Protects changes to subtitles and encoding */
169 GList *subtitles; /* List of elements with subtitle-encoding,
170 * protected by above mutex! */
172 gboolean have_type; /* if we received the have_type signal */
173 guint have_type_id; /* signal id for have-type from typefind */
175 gboolean async_pending; /* async-start has been emitted */
177 GMutex *dyn_lock; /* lock protecting pad blocking */
178 gboolean shutdown; /* if we are shutting down */
179 GList *blocked_pads; /* pads that have set to block */
181 gboolean expose_allstreams; /* Whether to expose unknow type streams or not */
183 GList *filtered; /* elements for which error messages are filtered */
186 struct _GstDecodeBinClass
188 GstBinClass parent_class;
190 /* signal we fire when a new pad has been decoded into raw audio/video */
191 void (*new_decoded_pad) (GstElement * element, GstPad * pad, gboolean last);
192 /* signal we fire when a pad has been removed */
193 void (*removed_decoded_pad) (GstElement * element, GstPad * pad);
194 /* signal fired when we found a pad that we cannot decode */
195 void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
197 /* signal fired to know if we continue trying to decode the given caps */
198 gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
200 /* signal fired to get a list of factories to try to autoplug */
201 GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
203 /* signal fired to sort the factories */
204 GValueArray *(*autoplug_sort) (GstElement * element, GstPad * pad,
205 GstCaps * caps, GValueArray * factories);
206 /* signal fired to select from the proposed list of factories */
207 GstAutoplugSelectResult (*autoplug_select) (GstElement * element,
208 GstPad * pad, GstCaps * caps, GstElementFactory * factory);
210 /* fired when the last group is drained */
211 void (*drained) (GstElement * element);
217 SIGNAL_NEW_DECODED_PAD,
218 SIGNAL_REMOVED_DECODED_PAD,
220 SIGNAL_AUTOPLUG_CONTINUE,
221 SIGNAL_AUTOPLUG_FACTORIES,
222 SIGNAL_AUTOPLUG_SELECT,
223 SIGNAL_AUTOPLUG_SORT,
228 /* automatic sizes, while prerolling we buffer up to 2MB, we ignore time
229 * and buffers in this case. */
230 #define AUTO_PREROLL_SIZE_BYTES 2 * 1024 * 1024
231 #define AUTO_PREROLL_SIZE_BUFFERS 0
232 #define AUTO_PREROLL_NOT_SEEKABLE_SIZE_TIME 10 * GST_SECOND
233 #define AUTO_PREROLL_SEEKABLE_SIZE_TIME 0
235 /* whan playing, keep a max of 2MB of data but try to keep the number of buffers
236 * as low as possible (try to aim for 5 buffers) */
237 #define AUTO_PLAY_SIZE_BYTES 2 * 1024 * 1024
238 #define AUTO_PLAY_SIZE_BUFFERS 5
239 #define AUTO_PLAY_SIZE_TIME 0
241 #define DEFAULT_SUBTITLE_ENCODING NULL
242 #define DEFAULT_USE_BUFFERING FALSE
243 #define DEFAULT_LOW_PERCENT 10
244 #define DEFAULT_HIGH_PERCENT 99
245 /* by default we use the automatic values above */
246 #define DEFAULT_MAX_SIZE_BYTES 0
247 #define DEFAULT_MAX_SIZE_BUFFERS 0
248 #define DEFAULT_MAX_SIZE_TIME 0
249 #define DEFAULT_POST_STREAM_TOPOLOGY FALSE
250 #define DEFAULT_EXPOSE_ALL_STREAMS TRUE
257 PROP_SUBTITLE_ENCODING,
263 PROP_MAX_SIZE_BUFFERS,
265 PROP_POST_STREAM_TOPOLOGY,
266 PROP_EXPOSE_ALL_STREAMS,
270 static GstBinClass *parent_class;
271 static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
273 static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS);
275 static void do_async_start (GstDecodeBin * dbin);
276 static void do_async_done (GstDecodeBin * dbin);
278 static void type_found (GstElement * typefind, guint probability,
279 GstCaps * caps, GstDecodeBin * decode_bin);
281 static void decodebin_set_queue_size (GstDecodeBin * dbin,
282 GstElement * multiqueue, gboolean preroll, gboolean seekable);
284 static gboolean gst_decode_bin_autoplug_continue (GstElement * element,
285 GstPad * pad, GstCaps * caps);
286 static GValueArray *gst_decode_bin_autoplug_factories (GstElement *
287 element, GstPad * pad, GstCaps * caps);
288 static GValueArray *gst_decode_bin_autoplug_sort (GstElement * element,
289 GstPad * pad, GstCaps * caps, GValueArray * factories);
290 static GstAutoplugSelectResult gst_decode_bin_autoplug_select (GstElement *
291 element, GstPad * pad, GstCaps * caps, GstElementFactory * factory);
293 static void gst_decode_bin_set_property (GObject * object, guint prop_id,
294 const GValue * value, GParamSpec * pspec);
295 static void gst_decode_bin_get_property (GObject * object, guint prop_id,
296 GValue * value, GParamSpec * pspec);
297 static void gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps);
298 static GstCaps *gst_decode_bin_get_caps (GstDecodeBin * dbin);
299 static void caps_notify_cb (GstPad * pad, GParamSpec * unused,
300 GstDecodeChain * chain);
302 static GstPad *find_sink_pad (GstElement * element);
303 static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element,
304 GstStateChange transition);
305 static void gst_decode_bin_handle_message (GstBin * bin, GstMessage * message);
307 static gboolean check_upstream_seekable (GstDecodeBin * dbin, GstPad * pad);
309 #define EXPOSE_LOCK(dbin) G_STMT_START { \
310 GST_LOG_OBJECT (dbin, \
311 "expose locking from thread %p", \
313 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \
314 GST_LOG_OBJECT (dbin, \
315 "expose locked from thread %p", \
319 #define EXPOSE_UNLOCK(dbin) G_STMT_START { \
320 GST_LOG_OBJECT (dbin, \
321 "expose unlocking from thread %p", \
323 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \
326 #define DYN_LOCK(dbin) G_STMT_START { \
327 GST_LOG_OBJECT (dbin, \
328 "dynlocking from thread %p", \
330 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \
331 GST_LOG_OBJECT (dbin, \
332 "dynlocked from thread %p", \
336 #define DYN_UNLOCK(dbin) G_STMT_START { \
337 GST_LOG_OBJECT (dbin, \
338 "dynunlocking from thread %p", \
340 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \
343 #define SUBTITLE_LOCK(dbin) G_STMT_START { \
344 GST_LOG_OBJECT (dbin, \
345 "subtitle locking from thread %p", \
347 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \
348 GST_LOG_OBJECT (dbin, \
349 "subtitle lock from thread %p", \
353 #define SUBTITLE_UNLOCK(dbin) G_STMT_START { \
354 GST_LOG_OBJECT (dbin, \
355 "subtitle unlocking from thread %p", \
357 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \
360 struct _GstPendingPad
363 GstDecodeChain *chain;
364 gulong event_probe_id;
367 struct _GstDecodeElement
370 GstElement *capsfilter; /* Optional capsfilter for Parser/Convert */
375 * Streams belonging to the same group/chain of a media file
377 * When changing something here lock the parent chain!
379 struct _GstDecodeGroup
382 GstDecodeChain *parent;
384 GstElement *multiqueue; /* Used for linking all child chains */
385 gulong overrunsig; /* the overrun signal for multiqueue */
387 gboolean overrun; /* TRUE if the multiqueue signaled overrun. This
388 * means that we should really expose the group */
390 gboolean no_more_pads; /* TRUE if the demuxer signaled no-more-pads */
391 gboolean drained; /* TRUE if the all children are drained */
393 GList *children; /* List of GstDecodeChains in this group */
395 GList *reqpads; /* List of RequestPads for multiqueue, there is
396 * exactly one RequestPad per child chain */
399 struct _GstDecodeChain
401 GstDecodeGroup *parent;
404 GMutex *lock; /* Protects this chain and its groups */
406 GstPad *pad; /* srcpad that caused creation of this chain */
408 gboolean demuxer; /* TRUE if elements->data is a demuxer */
409 gboolean seekable; /* TRUE if this chain ends on a demuxer and is seekable */
410 GList *elements; /* All elements in this group, first
411 is the latest and most downstream element */
413 /* Note: there are only groups if the last element of this chain
414 * is a demuxer, otherwise the chain will end with an endpad.
415 * The other way around this means, that endpad only exists if this
416 * chain doesn't end with a demuxer! */
418 GstDecodeGroup *active_group; /* Currently active group */
419 GList *next_groups; /* head is newest group, tail is next group.
420 a new group will be created only if the head
421 group had no-more-pads. If it's only exposed
422 all new pads will be ignored! */
423 GList *pending_pads; /* Pads that have no fixed caps yet */
425 GstDecodePad *endpad; /* Pad of this chain that could be exposed */
426 gboolean deadend; /* This chain is incomplete and can't be completed,
427 e.g. no suitable decoder could be found
428 e.g. stream got EOS without buffers
430 GstCaps *endcaps; /* Caps that were used when linking to the endpad
431 or that resulted in the deadend
434 /* FIXME: This should be done directly via a thread! */
435 GList *old_groups; /* Groups that should be freed later */
438 static void gst_decode_chain_free (GstDecodeChain * chain);
439 static GstDecodeChain *gst_decode_chain_new (GstDecodeBin * dbin,
440 GstDecodeGroup * group, GstPad * pad);
441 static void gst_decode_group_hide (GstDecodeGroup * group);
442 static void gst_decode_group_free (GstDecodeGroup * group);
443 static GstDecodeGroup *gst_decode_group_new (GstDecodeBin * dbin,
444 GstDecodeChain * chain);
445 static gboolean gst_decode_chain_is_complete (GstDecodeChain * chain);
446 static gboolean gst_decode_chain_expose (GstDecodeChain * chain,
447 GList ** endpads, gboolean * missing_plugin);
448 static gboolean gst_decode_chain_is_drained (GstDecodeChain * chain);
449 static gboolean gst_decode_group_is_complete (GstDecodeGroup * group);
450 static GstPad *gst_decode_group_control_demuxer_pad (GstDecodeGroup * group,
452 static gboolean gst_decode_group_is_drained (GstDecodeGroup * group);
454 static gboolean gst_decode_bin_expose (GstDecodeBin * dbin);
456 #define CHAIN_MUTEX_LOCK(chain) G_STMT_START { \
457 GST_LOG_OBJECT (chain->dbin, \
458 "locking chain %p from thread %p", \
459 chain, g_thread_self ()); \
460 g_mutex_lock (chain->lock); \
461 GST_LOG_OBJECT (chain->dbin, \
462 "locked chain %p from thread %p", \
463 chain, g_thread_self ()); \
466 #define CHAIN_MUTEX_UNLOCK(chain) G_STMT_START { \
467 GST_LOG_OBJECT (chain->dbin, \
468 "unlocking chain %p from thread %p", \
469 chain, g_thread_self ()); \
470 g_mutex_unlock (chain->lock); \
475 * GstPad private used for source pads of chains
481 GstDecodeChain *chain;
483 gboolean blocked; /* the *target* pad is blocked */
484 gboolean exposed; /* the pad is exposed */
485 gboolean drained; /* an EOS has been seen on the pad */
488 GType gst_decode_pad_get_type (void);
489 G_DEFINE_TYPE (GstDecodePad, gst_decode_pad, GST_TYPE_GHOST_PAD);
490 #define GST_TYPE_DECODE_PAD (gst_decode_pad_get_type ())
491 #define GST_DECODE_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_PAD,GstDecodePad))
493 static GstDecodePad *gst_decode_pad_new (GstDecodeBin * dbin, GstPad * pad,
494 GstDecodeChain * chain);
495 static void gst_decode_pad_activate (GstDecodePad * dpad,
496 GstDecodeChain * chain);
497 static void gst_decode_pad_unblock (GstDecodePad * dpad);
498 static void gst_decode_pad_set_blocked (GstDecodePad * dpad, gboolean blocked);
500 static void gst_pending_pad_free (GstPendingPad * ppad);
501 static gboolean pad_event_cb (GstPad * pad, GstEvent * event, gpointer data);
503 /********************************
504 * Standard GObject boilerplate *
505 ********************************/
507 static void gst_decode_bin_class_init (GstDecodeBinClass * klass);
508 static void gst_decode_bin_init (GstDecodeBin * decode_bin);
509 static void gst_decode_bin_dispose (GObject * object);
510 static void gst_decode_bin_finalize (GObject * object);
513 gst_decode_bin_get_type (void)
515 static GType gst_decode_bin_type = 0;
517 if (!gst_decode_bin_type) {
518 static const GTypeInfo gst_decode_bin_info = {
519 sizeof (GstDecodeBinClass),
522 (GClassInitFunc) gst_decode_bin_class_init,
525 sizeof (GstDecodeBin),
527 (GInstanceInitFunc) gst_decode_bin_init,
531 gst_decode_bin_type =
532 g_type_register_static (GST_TYPE_BIN, "GstDecodeBin2",
533 &gst_decode_bin_info, 0);
536 return gst_decode_bin_type;
540 _gst_boolean_accumulator (GSignalInvocationHint * ihint,
541 GValue * return_accu, const GValue * handler_return, gpointer dummy)
545 myboolean = g_value_get_boolean (handler_return);
546 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
547 g_value_set_boolean (return_accu, myboolean);
549 /* stop emission if FALSE */
553 /* we collect the first result */
555 _gst_array_accumulator (GSignalInvocationHint * ihint,
556 GValue * return_accu, const GValue * handler_return, gpointer dummy)
560 array = g_value_get_boxed (handler_return);
561 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
562 g_value_set_boxed (return_accu, array);
568 _gst_select_accumulator (GSignalInvocationHint * ihint,
569 GValue * return_accu, const GValue * handler_return, gpointer dummy)
571 GstAutoplugSelectResult res;
573 res = g_value_get_enum (handler_return);
574 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
575 g_value_set_enum (return_accu, res);
581 _gst_array_hasvalue_accumulator (GSignalInvocationHint * ihint,
582 GValue * return_accu, const GValue * handler_return, gpointer dummy)
586 array = g_value_get_boxed (handler_return);
587 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
588 g_value_set_boxed (return_accu, array);
597 gst_decode_bin_class_init (GstDecodeBinClass * klass)
599 GObjectClass *gobject_klass;
600 GstElementClass *gstelement_klass;
601 GstBinClass *gstbin_klass;
603 gobject_klass = (GObjectClass *) klass;
604 gstelement_klass = (GstElementClass *) klass;
605 gstbin_klass = (GstBinClass *) klass;
607 parent_class = g_type_class_peek_parent (klass);
609 gobject_klass->dispose = gst_decode_bin_dispose;
610 gobject_klass->finalize = gst_decode_bin_finalize;
611 gobject_klass->set_property = gst_decode_bin_set_property;
612 gobject_klass->get_property = gst_decode_bin_get_property;
615 * GstDecodeBin2::new-decoded-pad:
616 * @bin: The decodebin.
617 * @pad: The newly created pad.
618 * @islast: #TRUE if this is the last pad to be added. Deprecated.
620 * This signal gets emitted as soon as a new pad of the same type as one of
621 * the valid 'raw' types is added.
623 * Deprecated: Use GstElement::pad-added instead of this signal.
626 gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] =
627 g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass),
629 G_STRUCT_OFFSET (GstDecodeBinClass, new_decoded_pad), NULL, NULL,
630 gst_play_marshal_VOID__OBJECT_BOOLEAN, G_TYPE_NONE, 2, GST_TYPE_PAD,
634 * GstDecodeBin2::removed-decoded-pad:
635 * @bin: The decodebin.
636 * @pad: The pad that was removed.
638 * This signal is emitted when a 'final' caps pad has been removed.
640 * Deprecated: Use GstElement::pad-removed instead of this signal.
643 gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD] =
644 g_signal_new ("removed-decoded-pad", G_TYPE_FROM_CLASS (klass),
646 G_STRUCT_OFFSET (GstDecodeBinClass, removed_decoded_pad), NULL, NULL,
647 gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
650 * GstDecodeBin2::unknown-type:
651 * @bin: The decodebin.
652 * @pad: The new pad containing caps that cannot be resolved to a 'final'
654 * @caps: The #GstCaps of the pad that cannot be resolved.
656 * This signal is emitted when a pad for which there is no further possible
657 * decoding is added to the decodebin.
659 gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
660 g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
661 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type),
662 NULL, NULL, gst_marshal_VOID__OBJECT_BOXED, G_TYPE_NONE, 2,
663 GST_TYPE_PAD, GST_TYPE_CAPS);
666 * GstDecodeBin2::autoplug-continue:
667 * @bin: The decodebin.
669 * @caps: The #GstCaps found.
671 * This signal is emitted whenever decodebin2 finds a new stream. It is
672 * emitted before looking for any elements that can handle that stream.
675 * Invocation of signal handlers stops after the first signal handler
676 * returns #FALSE. Signal handlers are invoked in the order they were
680 * Returns: #TRUE if you wish decodebin2 to look for elements that can
681 * handle the given @caps. If #FALSE, those caps will be considered as
682 * final and the pad will be exposed as such (see 'new-decoded-pad'
685 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
686 g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
687 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_continue),
688 _gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT_BOXED,
689 G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
692 * GstDecodeBin2::autoplug-factories:
693 * @bin: The decodebin.
695 * @caps: The #GstCaps found.
697 * This function is emitted when an array of possible factories for @caps on
698 * @pad is needed. Decodebin2 will by default return an array with all
699 * compatible factories, sorted by rank.
701 * If this function returns NULL, @pad will be exposed as a final caps.
703 * If this function returns an empty array, the pad will be considered as
704 * having an unhandled type media type.
707 * Only the signal handler that is connected first will ever by invoked.
708 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
709 * signal, they will never be invoked!
712 * Returns: a #GValueArray* with a list of factories to try. The factories are
713 * by default tried in the returned order or based on the index returned by
716 gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
717 g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
718 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass,
719 autoplug_factories), _gst_array_accumulator, NULL,
720 gst_play_marshal_BOXED__OBJECT_BOXED, G_TYPE_VALUE_ARRAY, 2,
721 GST_TYPE_PAD, GST_TYPE_CAPS);
724 * GstDecodeBin2::autoplug-sort:
725 * @bin: The decodebin.
727 * @caps: The #GstCaps.
728 * @factories: A #GValueArray of possible #GstElementFactory to use.
730 * Once decodebin2 has found the possible #GstElementFactory objects to try
731 * for @caps on @pad, this signal is emitted. The purpose of the signal is for
732 * the application to perform additional sorting or filtering on the element
735 * The callee should copy and modify @factories or return #NULL if the
736 * order should not change.
739 * Invocation of signal handlers stops after one signal handler has
740 * returned something else than #NULL. Signal handlers are invoked in
741 * the order they were connected in.
742 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
743 * signal, they will never be invoked!
746 * Returns: A new sorted array of #GstElementFactory objects.
748 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] =
749 g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass),
750 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_sort),
751 _gst_array_hasvalue_accumulator, NULL,
752 gst_play_marshal_BOXED__OBJECT_BOXED_BOXED, G_TYPE_VALUE_ARRAY, 3,
753 GST_TYPE_PAD, GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY);
756 * GstDecodeBin2::autoplug-select:
757 * @bin: The decodebin.
759 * @caps: The #GstCaps.
760 * @factory: A #GstElementFactory to use.
762 * This signal is emitted once decodebin2 has found all the possible
763 * #GstElementFactory that can be used to handle the given @caps. For each of
764 * those factories, this signal is emitted.
766 * The signal handler should return a #GST_TYPE_AUTOPLUG_SELECT_RESULT enum
767 * value indicating what decodebin2 should do next.
769 * A value of #GST_AUTOPLUG_SELECT_TRY will try to autoplug an element from
772 * A value of #GST_AUTOPLUG_SELECT_EXPOSE will expose @pad without plugging
775 * A value of #GST_AUTOPLUG_SELECT_SKIP will skip @factory and move to the
779 * Only the signal handler that is connected first will ever by invoked.
780 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
781 * signal, they will never be invoked!
784 * Returns: a #GST_TYPE_AUTOPLUG_SELECT_RESULT that indicates the required
785 * operation. the default handler will always return
786 * #GST_AUTOPLUG_SELECT_TRY.
788 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] =
789 g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass),
790 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_select),
791 _gst_select_accumulator, NULL,
792 gst_play_marshal_ENUM__OBJECT_BOXED_OBJECT,
793 GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
794 GST_TYPE_ELEMENT_FACTORY);
797 * GstDecodeBin2::drained
798 * @bin: The decodebin
800 * This signal is emitted once decodebin2 has finished decoding all the data.
804 gst_decode_bin_signals[SIGNAL_DRAINED] =
805 g_signal_new ("drained", G_TYPE_FROM_CLASS (klass),
806 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, drained),
807 NULL, NULL, gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
809 g_object_class_install_property (gobject_klass, PROP_CAPS,
810 g_param_spec_boxed ("caps", "Caps", "The caps on which to stop decoding.",
811 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
813 g_object_class_install_property (gobject_klass, PROP_SUBTITLE_ENCODING,
814 g_param_spec_string ("subtitle-encoding", "subtitle encoding",
815 "Encoding to assume if input subtitles are not in UTF-8 encoding. "
816 "If not set, the GST_SUBTITLE_ENCODING environment variable will "
817 "be checked for an encoding to use. If that is not set either, "
818 "ISO-8859-15 will be assumed.", NULL,
819 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
821 g_object_class_install_property (gobject_klass, PROP_SINK_CAPS,
822 g_param_spec_boxed ("sink-caps", "Sink Caps",
823 "The caps of the input data. (NULL = use typefind element)",
824 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
827 * GstDecodeBin2::use-buffering
829 * Activate buffering in decodebin2. This will instruct the multiqueues behind
830 * decoders to emit BUFFERING messages.
834 g_object_class_install_property (gobject_klass, PROP_USE_BUFFERING,
835 g_param_spec_boolean ("use-buffering", "Use Buffering",
836 "Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds",
837 DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
840 * GstDecodebin2:low-percent
842 * Low threshold percent for buffering to start.
846 g_object_class_install_property (gobject_klass, PROP_LOW_PERCENT,
847 g_param_spec_int ("low-percent", "Low percent",
848 "Low threshold for buffering to start", 0, 100,
849 DEFAULT_LOW_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
851 * GstDecodebin2:high-percent
853 * High threshold percent for buffering to finish.
857 g_object_class_install_property (gobject_klass, PROP_HIGH_PERCENT,
858 g_param_spec_int ("high-percent", "High percent",
859 "High threshold for buffering to finish", 0, 100,
860 DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
863 * GstDecodebin2:max-size-bytes
865 * Max amount of bytes in the queue (0=automatic).
869 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BYTES,
870 g_param_spec_uint ("max-size-bytes", "Max. size (bytes)",
871 "Max. amount of bytes in the queue (0=automatic)",
872 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
873 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
875 * GstDecodebin2:max-size-buffers
877 * Max amount of buffers in the queue (0=automatic).
881 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BUFFERS,
882 g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
883 "Max. number of buffers in the queue (0=automatic)",
884 0, G_MAXUINT, DEFAULT_MAX_SIZE_BUFFERS,
885 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
887 * GstDecodebin2:max-size-time
889 * Max amount of time in the queue (in ns, 0=automatic).
893 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_TIME,
894 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
895 "Max. amount of data in the queue (in ns, 0=automatic)",
897 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
900 * GstDecodeBin2::post-stream-topology
902 * Post stream-topology messages on the bus every time the topology changes.
906 g_object_class_install_property (gobject_klass, PROP_POST_STREAM_TOPOLOGY,
907 g_param_spec_boolean ("post-stream-topology", "Post Stream Topology",
908 "Post stream-topology messages",
909 DEFAULT_POST_STREAM_TOPOLOGY,
910 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
913 * GstDecodeBin2::expose-all-streams
915 * Expose streams of unknown type.
917 * If set to %FALSE, then only the streams that can be decoded to the final
918 * caps (see 'caps' property) will have a pad exposed. Streams that do not
919 * match those caps but could have been decoded will not have decoder plugged
920 * in internally and will not have a pad exposed.
924 g_object_class_install_property (gobject_klass, PROP_EXPOSE_ALL_STREAMS,
925 g_param_spec_boolean ("expose-all-streams", "Expose All Streams",
926 "Expose all streams, including those of unknown type or that don't match the 'caps' property",
927 DEFAULT_EXPOSE_ALL_STREAMS,
928 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
932 klass->autoplug_continue =
933 GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_continue);
934 klass->autoplug_factories =
935 GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_factories);
936 klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_sort);
937 klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_select);
939 gst_element_class_add_static_pad_template (gstelement_klass,
940 &decoder_bin_sink_template);
941 gst_element_class_add_static_pad_template (gstelement_klass,
942 &decoder_bin_src_template);
944 gst_element_class_set_details_simple (gstelement_klass,
945 "Decoder Bin", "Generic/Bin/Decoder",
946 "Autoplug and decode to raw media",
947 "Edward Hervey <edward.hervey@collabora.co.uk>, "
948 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
950 gstelement_klass->change_state =
951 GST_DEBUG_FUNCPTR (gst_decode_bin_change_state);
953 gstbin_klass->handle_message =
954 GST_DEBUG_FUNCPTR (gst_decode_bin_handle_message);
957 /* Must be called with factories lock! */
959 gst_decode_bin_update_factories_list (GstDecodeBin * dbin)
962 || dbin->factories_cookie !=
963 gst_default_registry_get_feature_list_cookie ()) {
965 gst_plugin_feature_list_free (dbin->factories);
967 gst_element_factory_list_get_elements
968 (GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
969 dbin->factories_cookie = gst_default_registry_get_feature_list_cookie ();
974 gst_decode_bin_init (GstDecodeBin * decode_bin)
976 /* first filter out the interesting element factories */
977 decode_bin->factories_lock = g_mutex_new ();
979 /* we create the typefind element only once */
980 decode_bin->typefind = gst_element_factory_make ("typefind", "typefind");
981 if (!decode_bin->typefind) {
982 g_warning ("can't find typefind element, decodebin will not work");
986 GstPadTemplate *pad_tmpl;
988 /* add the typefind element */
989 if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind)) {
990 g_warning ("Could not add typefind element, decodebin will not work");
991 gst_object_unref (decode_bin->typefind);
992 decode_bin->typefind = NULL;
995 /* get the sinkpad */
996 pad = gst_element_get_static_pad (decode_bin->typefind, "sink");
998 /* get the pad template */
999 pad_tmpl = gst_static_pad_template_get (&decoder_bin_sink_template);
1001 /* ghost the sink pad to ourself */
1002 gpad = gst_ghost_pad_new_from_template ("sink", pad, pad_tmpl);
1003 gst_pad_set_active (gpad, TRUE);
1004 gst_element_add_pad (GST_ELEMENT (decode_bin), gpad);
1006 gst_object_unref (pad_tmpl);
1007 gst_object_unref (pad);
1009 /* connect a signal to find out when the typefind element found
1011 decode_bin->have_type_id =
1012 g_signal_connect (G_OBJECT (decode_bin->typefind), "have-type",
1013 G_CALLBACK (type_found), decode_bin);
1016 decode_bin->expose_lock = g_mutex_new ();
1017 decode_bin->decode_chain = NULL;
1019 decode_bin->dyn_lock = g_mutex_new ();
1020 decode_bin->shutdown = FALSE;
1021 decode_bin->blocked_pads = NULL;
1023 decode_bin->subtitle_lock = g_mutex_new ();
1025 decode_bin->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING);
1026 decode_bin->caps = gst_static_caps_get (&default_raw_caps);
1027 decode_bin->use_buffering = DEFAULT_USE_BUFFERING;
1028 decode_bin->low_percent = DEFAULT_LOW_PERCENT;
1029 decode_bin->high_percent = DEFAULT_HIGH_PERCENT;
1031 decode_bin->max_size_bytes = DEFAULT_MAX_SIZE_BYTES;
1032 decode_bin->max_size_buffers = DEFAULT_MAX_SIZE_BUFFERS;
1033 decode_bin->max_size_time = DEFAULT_MAX_SIZE_TIME;
1035 decode_bin->expose_allstreams = DEFAULT_EXPOSE_ALL_STREAMS;
1039 gst_decode_bin_dispose (GObject * object)
1041 GstDecodeBin *decode_bin;
1043 decode_bin = GST_DECODE_BIN (object);
1045 if (decode_bin->factories)
1046 gst_plugin_feature_list_free (decode_bin->factories);
1047 decode_bin->factories = NULL;
1049 if (decode_bin->decode_chain)
1050 gst_decode_chain_free (decode_bin->decode_chain);
1051 decode_bin->decode_chain = NULL;
1053 if (decode_bin->caps)
1054 gst_caps_unref (decode_bin->caps);
1055 decode_bin->caps = NULL;
1057 g_free (decode_bin->encoding);
1058 decode_bin->encoding = NULL;
1060 g_list_free (decode_bin->subtitles);
1061 decode_bin->subtitles = NULL;
1063 G_OBJECT_CLASS (parent_class)->dispose (object);
1067 gst_decode_bin_finalize (GObject * object)
1069 GstDecodeBin *decode_bin;
1071 decode_bin = GST_DECODE_BIN (object);
1073 if (decode_bin->expose_lock) {
1074 g_mutex_free (decode_bin->expose_lock);
1075 decode_bin->expose_lock = NULL;
1078 if (decode_bin->dyn_lock) {
1079 g_mutex_free (decode_bin->dyn_lock);
1080 decode_bin->dyn_lock = NULL;
1083 if (decode_bin->subtitle_lock) {
1084 g_mutex_free (decode_bin->subtitle_lock);
1085 decode_bin->subtitle_lock = NULL;
1088 if (decode_bin->factories_lock) {
1089 g_mutex_free (decode_bin->factories_lock);
1090 decode_bin->factories_lock = NULL;
1093 G_OBJECT_CLASS (parent_class)->finalize (object);
1097 * Changes the caps on which decodebin will stop decoding.
1098 * Will unref the previously set one. The refcount of the given caps will be
1100 * @caps can be NULL.
1105 gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps)
1107 GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps);
1109 GST_OBJECT_LOCK (dbin);
1110 gst_caps_replace (&dbin->caps, caps);
1111 GST_OBJECT_UNLOCK (dbin);
1115 * Returns the currently configured caps on which decodebin will stop decoding.
1116 * The returned caps (if not NULL), will have its refcount incremented.
1121 gst_decode_bin_get_caps (GstDecodeBin * dbin)
1125 GST_DEBUG_OBJECT (dbin, "Getting currently set caps");
1127 GST_OBJECT_LOCK (dbin);
1130 gst_caps_ref (caps);
1131 GST_OBJECT_UNLOCK (dbin);
1137 gst_decode_bin_set_sink_caps (GstDecodeBin * dbin, GstCaps * caps)
1139 GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps);
1141 g_object_set (dbin->typefind, "force-caps", caps, NULL);
1145 gst_decode_bin_get_sink_caps (GstDecodeBin * dbin)
1149 GST_DEBUG_OBJECT (dbin, "Getting currently set caps");
1151 g_object_get (dbin->typefind, "force-caps", &caps, NULL);
1157 gst_decode_bin_set_subs_encoding (GstDecodeBin * dbin, const gchar * encoding)
1161 GST_DEBUG_OBJECT (dbin, "Setting new encoding: %s", GST_STR_NULL (encoding));
1163 SUBTITLE_LOCK (dbin);
1164 g_free (dbin->encoding);
1165 dbin->encoding = g_strdup (encoding);
1167 /* set the subtitle encoding on all added elements */
1168 for (walk = dbin->subtitles; walk; walk = g_list_next (walk)) {
1169 g_object_set (G_OBJECT (walk->data), "subtitle-encoding", dbin->encoding,
1172 SUBTITLE_UNLOCK (dbin);
1176 gst_decode_bin_get_subs_encoding (GstDecodeBin * dbin)
1180 GST_DEBUG_OBJECT (dbin, "Getting currently set encoding");
1182 SUBTITLE_LOCK (dbin);
1183 encoding = g_strdup (dbin->encoding);
1184 SUBTITLE_UNLOCK (dbin);
1190 gst_decode_bin_set_property (GObject * object, guint prop_id,
1191 const GValue * value, GParamSpec * pspec)
1195 dbin = GST_DECODE_BIN (object);
1199 gst_decode_bin_set_caps (dbin, g_value_get_boxed (value));
1201 case PROP_SUBTITLE_ENCODING:
1202 gst_decode_bin_set_subs_encoding (dbin, g_value_get_string (value));
1204 case PROP_SINK_CAPS:
1205 gst_decode_bin_set_sink_caps (dbin, g_value_get_boxed (value));
1207 case PROP_USE_BUFFERING:
1208 dbin->use_buffering = g_value_get_boolean (value);
1210 case PROP_LOW_PERCENT:
1211 dbin->low_percent = g_value_get_int (value);
1213 case PROP_HIGH_PERCENT:
1214 dbin->high_percent = g_value_get_int (value);
1216 case PROP_MAX_SIZE_BYTES:
1217 dbin->max_size_bytes = g_value_get_uint (value);
1219 case PROP_MAX_SIZE_BUFFERS:
1220 dbin->max_size_buffers = g_value_get_uint (value);
1222 case PROP_MAX_SIZE_TIME:
1223 dbin->max_size_time = g_value_get_uint64 (value);
1225 case PROP_POST_STREAM_TOPOLOGY:
1226 dbin->post_stream_topology = g_value_get_boolean (value);
1228 case PROP_EXPOSE_ALL_STREAMS:
1229 dbin->expose_allstreams = g_value_get_boolean (value);
1232 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1238 gst_decode_bin_get_property (GObject * object, guint prop_id,
1239 GValue * value, GParamSpec * pspec)
1243 dbin = GST_DECODE_BIN (object);
1246 g_value_take_boxed (value, gst_decode_bin_get_caps (dbin));
1248 case PROP_SUBTITLE_ENCODING:
1249 g_value_take_string (value, gst_decode_bin_get_subs_encoding (dbin));
1251 case PROP_SINK_CAPS:
1252 g_value_take_boxed (value, gst_decode_bin_get_sink_caps (dbin));
1254 case PROP_USE_BUFFERING:
1255 g_value_set_boolean (value, dbin->use_buffering);
1257 case PROP_LOW_PERCENT:
1258 g_value_set_int (value, dbin->low_percent);
1260 case PROP_HIGH_PERCENT:
1261 g_value_set_int (value, dbin->high_percent);
1263 case PROP_MAX_SIZE_BYTES:
1264 g_value_set_uint (value, dbin->max_size_bytes);
1266 case PROP_MAX_SIZE_BUFFERS:
1267 g_value_set_uint (value, dbin->max_size_buffers);
1269 case PROP_MAX_SIZE_TIME:
1270 g_value_set_uint64 (value, dbin->max_size_time);
1272 case PROP_POST_STREAM_TOPOLOGY:
1273 g_value_set_boolean (value, dbin->post_stream_topology);
1275 case PROP_EXPOSE_ALL_STREAMS:
1276 g_value_set_boolean (value, dbin->expose_allstreams);
1279 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1286 * Default autoplug signal handlers
1289 gst_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
1292 GST_DEBUG_OBJECT (element, "autoplug-continue returns TRUE");
1294 /* by default we always continue */
1298 static GValueArray *
1299 gst_decode_bin_autoplug_factories (GstElement * element, GstPad * pad,
1303 GValueArray *result;
1304 GstDecodeBin *dbin = GST_DECODE_BIN_CAST (element);
1306 GST_DEBUG_OBJECT (element, "finding factories");
1308 /* return all compatible factories for caps */
1309 g_mutex_lock (dbin->factories_lock);
1310 gst_decode_bin_update_factories_list (dbin);
1312 gst_element_factory_list_filter (dbin->factories, caps, GST_PAD_SINK,
1314 g_mutex_unlock (dbin->factories_lock);
1316 result = g_value_array_new (g_list_length (list));
1317 for (tmp = list; tmp; tmp = tmp->next) {
1318 GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data);
1319 GValue val = { 0, };
1321 g_value_init (&val, G_TYPE_OBJECT);
1322 g_value_set_object (&val, factory);
1323 g_value_array_append (result, &val);
1324 g_value_unset (&val);
1326 gst_plugin_feature_list_free (list);
1328 GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result);
1333 static GValueArray *
1334 gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad,
1335 GstCaps * caps, GValueArray * factories)
1340 static GstAutoplugSelectResult
1341 gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad,
1342 GstCaps * caps, GstElementFactory * factory)
1344 GST_DEBUG_OBJECT (element, "default autoplug-select returns TRY");
1347 return GST_AUTOPLUG_SELECT_TRY;
1354 static gboolean are_final_caps (GstDecodeBin * dbin, GstCaps * caps);
1355 static gboolean is_demuxer_element (GstElement * srcelement);
1357 static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src,
1358 GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GValueArray * factories,
1359 GstDecodeChain * chain);
1360 static gboolean connect_element (GstDecodeBin * dbin, GstElement * element,
1361 GstDecodeChain * chain);
1362 static void expose_pad (GstDecodeBin * dbin, GstElement * src,
1363 GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GstDecodeChain * chain);
1365 static void pad_added_cb (GstElement * element, GstPad * pad,
1366 GstDecodeChain * chain);
1367 static void pad_removed_cb (GstElement * element, GstPad * pad,
1368 GstDecodeChain * chain);
1369 static void no_more_pads_cb (GstElement * element, GstDecodeChain * chain);
1371 static GstDecodeGroup *gst_decode_chain_get_current_group (GstDecodeChain *
1374 /* called when a new pad is discovered. It will perform some basic actions
1375 * before trying to link something to it.
1377 * - Check the caps, don't do anything when there are no caps or when they have
1379 * - signal AUTOPLUG_CONTINUE to check if we need to continue autoplugging this
1381 * - if the caps are non-fixed, setup a handler to continue autoplugging when
1382 * the caps become fixed (connect to notify::caps).
1383 * - get list of factories to autoplug.
1384 * - continue autoplugging to one of the factories.
1387 analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
1388 GstCaps * caps, GstDecodeChain * chain)
1390 gboolean apcontinue = TRUE;
1391 GValueArray *factories = NULL, *result = NULL;
1393 GstElementFactory *factory;
1394 const gchar *classification;
1395 gboolean is_parser_converter = FALSE;
1398 GST_DEBUG_OBJECT (dbin, "Pad %s:%s caps:%" GST_PTR_FORMAT,
1399 GST_DEBUG_PAD_NAME (pad), caps);
1402 && src != ((GstDecodeElement *) chain->elements->data)->element
1403 && src != ((GstDecodeElement *) chain->elements->data)->capsfilter) {
1404 GST_ERROR_OBJECT (dbin, "New pad from not the last element in this chain");
1408 if (chain->endpad) {
1409 GST_ERROR_OBJECT (dbin, "New pad in a chain that is already complete");
1413 if (chain->demuxer) {
1414 GstDecodeGroup *group;
1415 GstDecodeChain *oldchain = chain;
1417 /* we are adding a new pad for a demuxer (see is_demuxer_element(),
1418 * start a new chain for it */
1419 CHAIN_MUTEX_LOCK (oldchain);
1420 group = gst_decode_chain_get_current_group (chain);
1422 chain = gst_decode_chain_new (dbin, group, pad);
1423 group->children = g_list_prepend (group->children, chain);
1425 CHAIN_MUTEX_UNLOCK (oldchain);
1427 GST_WARNING_OBJECT (dbin, "No current group");
1432 if ((caps == NULL) || gst_caps_is_empty (caps))
1435 if (gst_caps_is_any (caps))
1438 dpad = gst_decode_pad_new (dbin, pad, chain);
1440 /* 1. Emit 'autoplug-continue' the result will tell us if this pads needs
1441 * further autoplugging. Only do this for fixed caps, for unfixed caps
1442 * we will later come here again from the notify::caps handler. The
1443 * problem with unfixed caps is that we can reliably tell if the output
1444 * is e.g. accepted by a sink because only parts of the possible final
1445 * caps might be accepted by the sink. */
1446 if (gst_caps_is_fixed (caps))
1447 g_signal_emit (G_OBJECT (dbin),
1448 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, caps,
1453 /* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */
1454 if ((!apcontinue) || are_final_caps (dbin, caps))
1457 /* 1.b For Parser/Converter that can output different stream formats
1458 * we insert a capsfilter with the sorted caps of all possible next
1459 * elements and continue with the capsfilter srcpad */
1460 factory = gst_element_get_factory (src);
1461 classification = gst_element_factory_get_klass (factory);
1462 is_parser_converter = (strstr (classification, "Parser")
1463 && strstr (classification, "Converter"));
1465 /* 1.c when the caps are not fixed yet, we can't be sure what element to
1466 * connect. We delay autoplugging until the caps are fixed */
1467 if (!is_parser_converter && !gst_caps_is_fixed (caps))
1470 /* 1.d else get the factories and if there's no compatible factory goto
1472 g_signal_emit (G_OBJECT (dbin),
1473 gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, dpad, caps,
1476 /* NULL means that we can expose the pad */
1477 if (factories == NULL)
1480 /* if the array is empty, we have a type for which we have no decoder */
1481 if (factories->n_values == 0) {
1482 if (!dbin->expose_allstreams) {
1483 GstCaps *raw = gst_static_caps_get (&default_raw_caps);
1485 /* If the caps are raw, this just means we don't want to expose them */
1486 if (gst_caps_can_intersect (raw, caps)) {
1487 g_value_array_free (factories);
1488 gst_caps_unref (raw);
1489 gst_object_unref (dpad);
1490 goto discarded_type;
1492 gst_caps_unref (raw);
1495 /* if not we have a unhandled type with no compatible factories */
1496 g_value_array_free (factories);
1497 gst_object_unref (dpad);
1501 /* 1.e sort some more. */
1502 g_signal_emit (G_OBJECT (dbin),
1503 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, dpad, caps, factories,
1506 g_value_array_free (factories);
1510 /* At this point we have a potential decoder, but we might not need it
1511 * if it doesn't match the output caps */
1512 if (!dbin->expose_allstreams && gst_caps_is_fixed (caps)) {
1515 gboolean dontuse = FALSE;
1517 GST_DEBUG ("Checking if we can abort early");
1519 /* 1.f Do an early check to see if the candidates are potential decoders, but
1520 * due to the fact that they decode to a mediatype that is not final we don't
1523 for (i = 0; i < factories->n_values && !dontuse; i++) {
1524 GstElementFactory *factory =
1525 g_value_get_object (g_value_array_get_nth (factories, i));
1528 /* We are only interested in skipping decoders */
1529 if (strstr (gst_element_factory_get_klass (factory), "Decoder")) {
1531 GST_DEBUG ("Trying factory %s",
1532 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1534 /* Check the source pad template caps to see if they match raw caps but don't match
1536 for (tmps = gst_element_factory_get_static_pad_templates (factory);
1537 tmps && !dontuse; tmps = tmps->next) {
1538 GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data;
1539 if (st->direction != GST_PAD_SRC)
1541 tcaps = gst_static_pad_template_get_caps (st);
1545 /* Emit autoplug-continue to see if the caps are considered to be raw caps */
1546 g_signal_emit (G_OBJECT (dbin),
1547 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, tcaps,
1550 /* If autoplug-continue returns TRUE and the caps are not final, don't use them */
1551 if (apcontinue && !are_final_caps (dbin, tcaps))
1553 gst_caps_unref (tcaps);
1559 gst_object_unref (dpad);
1560 g_value_array_free (factories);
1561 goto discarded_type;
1565 /* 1.g now get the factory template caps and insert the capsfilter if this
1566 * is a parser/converter
1568 if (is_parser_converter) {
1569 GstCaps *filter_caps;
1572 GstDecodeElement *delem;
1574 g_assert (chain->elements != NULL);
1575 delem = (GstDecodeElement *) chain->elements->data;
1577 filter_caps = gst_caps_new_empty ();
1578 for (i = 0; i < factories->n_values; i++) {
1579 GstElementFactory *factory =
1580 g_value_get_object (g_value_array_get_nth (factories, i));
1581 GstCaps *tcaps, *intersection;
1584 GST_DEBUG ("Trying factory %s",
1585 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1587 if (gst_element_get_factory (src) == factory) {
1588 GST_DEBUG ("Skipping factory");
1592 for (tmps = gst_element_factory_get_static_pad_templates (factory); tmps;
1593 tmps = tmps->next) {
1594 GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data;
1595 if (st->direction != GST_PAD_SINK || st->presence != GST_PAD_ALWAYS)
1597 tcaps = gst_static_pad_template_get_caps (st);
1599 gst_caps_intersect_full (tcaps, caps, GST_CAPS_INTERSECT_FIRST);
1600 gst_caps_merge (filter_caps, intersection);
1601 gst_caps_unref (tcaps);
1605 /* Append the parser caps to prevent any not-negotiated errors */
1606 gst_caps_merge (filter_caps, gst_caps_copy (caps));
1608 delem->capsfilter = gst_element_factory_make ("capsfilter", NULL);
1609 g_object_set (G_OBJECT (delem->capsfilter), "caps", filter_caps, NULL);
1610 gst_caps_unref (filter_caps);
1611 gst_element_set_state (delem->capsfilter, GST_STATE_PAUSED);
1612 gst_bin_add (GST_BIN_CAST (dbin), gst_object_ref (delem->capsfilter));
1614 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1615 p = gst_element_get_static_pad (delem->capsfilter, "sink");
1616 gst_pad_link_full (pad, p, GST_PAD_LINK_CHECK_NOTHING);
1617 gst_object_unref (p);
1618 p = gst_element_get_static_pad (delem->capsfilter, "src");
1619 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), p);
1622 if (!gst_caps_is_fixed (caps)) {
1623 g_value_array_free (factories);
1628 /* 1.h else continue autoplugging something from the list. */
1629 GST_LOG_OBJECT (pad, "Let's continue discovery on this pad");
1630 res = connect_pad (dbin, src, dpad, pad, caps, factories, chain);
1632 /* Need to unref the capsfilter srcpad here if
1633 * we inserted a capsfilter */
1634 if (is_parser_converter)
1635 gst_object_unref (pad);
1637 gst_object_unref (dpad);
1638 g_value_array_free (factories);
1647 GST_LOG_OBJECT (dbin, "Pad is final. autoplug-continue:%d", apcontinue);
1648 expose_pad (dbin, src, dpad, pad, caps, chain);
1649 gst_object_unref (dpad);
1655 GST_LOG_OBJECT (pad, "Known type, but discarded because not final caps");
1656 chain->deadend = TRUE;
1657 chain->endcaps = gst_caps_ref (caps);
1659 /* Try to expose anything */
1661 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
1662 gst_decode_bin_expose (dbin);
1664 EXPOSE_UNLOCK (dbin);
1665 do_async_done (dbin);
1672 GST_LOG_OBJECT (pad, "Unknown type, posting message and firing signal");
1674 chain->deadend = TRUE;
1675 chain->endcaps = gst_caps_ref (caps);
1677 gst_element_post_message (GST_ELEMENT_CAST (dbin),
1678 gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
1680 g_signal_emit (G_OBJECT (dbin),
1681 gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
1683 /* Try to expose anything */
1685 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
1686 gst_decode_bin_expose (dbin);
1688 EXPOSE_UNLOCK (dbin);
1690 if (src == dbin->typefind) {
1693 if (caps && !gst_caps_is_empty (caps)) {
1694 desc = gst_pb_utils_get_decoder_description (caps);
1695 GST_ELEMENT_ERROR (dbin, STREAM, CODEC_NOT_FOUND,
1696 (_("A %s plugin is required to play this stream, "
1697 "but not installed."), desc),
1698 ("No decoder to handle media type '%s'",
1699 gst_structure_get_name (gst_caps_get_structure (caps, 0))));
1702 GST_ELEMENT_ERROR (dbin, STREAM, TYPE_NOT_FOUND,
1703 (_("Could not determine type of stream")),
1704 ("Stream caps %" GST_PTR_FORMAT, caps));
1706 do_async_done (dbin);
1712 GST_DEBUG_OBJECT (pad, "pad has non-fixed caps delay autoplugging");
1713 gst_object_unref (dpad);
1714 goto setup_caps_delay;
1718 GST_WARNING_OBJECT (pad,
1719 "pad has ANY caps, not able to autoplug to anything");
1720 goto setup_caps_delay;
1724 GstPendingPad *ppad;
1726 /* connect to caps notification */
1727 CHAIN_MUTEX_LOCK (chain);
1728 GST_LOG_OBJECT (dbin, "Chain %p has now %d dynamic pads", chain,
1729 g_list_length (chain->pending_pads));
1730 ppad = g_slice_new0 (GstPendingPad);
1731 ppad->pad = gst_object_ref (pad);
1732 ppad->chain = chain;
1733 ppad->event_probe_id =
1734 gst_pad_add_event_probe (pad, (GCallback) pad_event_cb, ppad);
1735 chain->pending_pads = g_list_prepend (chain->pending_pads, ppad);
1736 g_signal_connect (G_OBJECT (pad), "notify::caps",
1737 G_CALLBACK (caps_notify_cb), chain);
1738 CHAIN_MUTEX_UNLOCK (chain);
1740 /* If we're here because we have a Parser/Converter
1741 * we have to unref the pad */
1742 if (is_parser_converter)
1743 gst_object_unref (pad);
1750 add_error_filter (GstDecodeBin * dbin, GstElement * element)
1752 GST_OBJECT_LOCK (dbin);
1753 dbin->filtered = g_list_prepend (dbin->filtered, element);
1754 GST_OBJECT_UNLOCK (dbin);
1758 remove_error_filter (GstDecodeBin * dbin, GstElement * element)
1760 GST_OBJECT_LOCK (dbin);
1761 dbin->filtered = g_list_remove (dbin->filtered, element);
1762 GST_OBJECT_UNLOCK (dbin);
1767 * Try to connect the given pad to an element created from one of the factories,
1770 * Note that dpad is ghosting pad, and so pad is linked; be sure to unset dpad's
1771 * target before trying to link pad.
1773 * Returns TRUE if an element was properly created and linked
1776 connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
1777 GstPad * pad, GstCaps * caps, GValueArray * factories,
1778 GstDecodeChain * chain)
1780 gboolean res = FALSE;
1781 GstPad *mqpad = NULL;
1782 gboolean is_demuxer = chain->parent && !chain->elements; /* First pad after the demuxer */
1784 g_return_val_if_fail (factories != NULL, FALSE);
1785 g_return_val_if_fail (factories->n_values > 0, FALSE);
1787 GST_DEBUG_OBJECT (dbin, "pad %s:%s , chain:%p",
1788 GST_DEBUG_PAD_NAME (pad), chain);
1790 /* 1. is element demuxer or parser */
1792 GST_LOG_OBJECT (src,
1793 "is a demuxer, connecting the pad through multiqueue '%s'",
1794 GST_OBJECT_NAME (chain->parent->multiqueue));
1796 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1797 if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad)))
1799 src = chain->parent->multiqueue;
1801 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
1804 /* 2. Try to create an element and link to it */
1805 while (factories->n_values > 0) {
1806 GstAutoplugSelectResult ret;
1807 GstElementFactory *factory;
1808 GstDecodeElement *delem;
1809 GstElement *element;
1813 /* Set dpad target to pad again, it might've been unset
1814 * below but we came back here because something failed
1816 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
1818 /* take first factory */
1819 factory = g_value_get_object (g_value_array_get_nth (factories, 0));
1820 /* Remove selected factory from the list. */
1821 g_value_array_remove (factories, 0);
1823 /* If the factory is for a parser we first check if the factory
1824 * was already used for the current chain. If it was used already
1825 * we would otherwise create an infinite loop here because the
1826 * parser apparently accepts its own output as input.
1827 * This is only done for parsers because it's perfectly valid
1828 * to have other element classes after each other because a
1829 * parser is the only one that does not change the data. A
1830 * valid example for this would be multiple id3demux in a row.
1832 if (strstr (gst_element_factory_get_klass (factory), "Parser")) {
1833 gboolean skip = FALSE;
1836 CHAIN_MUTEX_LOCK (chain);
1837 for (l = chain->elements; l; l = l->next) {
1838 GstDecodeElement *delem = (GstDecodeElement *) l->data;
1839 GstElement *otherelement = delem->element;
1841 if (gst_element_get_factory (otherelement) == factory) {
1846 CHAIN_MUTEX_UNLOCK (chain);
1848 GST_DEBUG_OBJECT (dbin,
1849 "Skipping factory '%s' because it was already used in this chain",
1850 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory)));
1855 /* emit autoplug-select to see what we should do with it. */
1856 g_signal_emit (G_OBJECT (dbin),
1857 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT],
1858 0, dpad, caps, factory, &ret);
1861 case GST_AUTOPLUG_SELECT_TRY:
1862 GST_DEBUG_OBJECT (dbin, "autoplug select requested try");
1864 case GST_AUTOPLUG_SELECT_EXPOSE:
1865 GST_DEBUG_OBJECT (dbin, "autoplug select requested expose");
1866 /* expose the pad, we don't have the source element */
1867 expose_pad (dbin, src, dpad, pad, caps, chain);
1870 case GST_AUTOPLUG_SELECT_SKIP:
1871 GST_DEBUG_OBJECT (dbin, "autoplug select requested skip");
1874 GST_WARNING_OBJECT (dbin, "autoplug select returned unhandled %d", ret);
1878 /* 2.0. Unlink pad */
1879 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1881 /* 2.1. Try to create an element */
1882 if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
1883 GST_WARNING_OBJECT (dbin, "Could not create an element from %s",
1884 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1888 /* Filter errors, this will prevent the element from causing the pipeline
1889 * to error while we test it using READY state. */
1890 add_error_filter (dbin, element);
1892 /* ... add it ... */
1893 if (!(gst_bin_add (GST_BIN_CAST (dbin), element))) {
1894 GST_WARNING_OBJECT (dbin, "Couldn't add %s to the bin",
1895 GST_ELEMENT_NAME (element));
1896 remove_error_filter (dbin, element);
1897 gst_object_unref (element);
1901 /* Find its sink pad. */
1902 if (!(sinkpad = find_sink_pad (element))) {
1903 GST_WARNING_OBJECT (dbin, "Element %s doesn't have a sink pad",
1904 GST_ELEMENT_NAME (element));
1905 remove_error_filter (dbin, element);
1906 gst_bin_remove (GST_BIN (dbin), element);
1910 /* ... and try to link */
1911 if ((gst_pad_link (pad, sinkpad)) != GST_PAD_LINK_OK) {
1912 GST_WARNING_OBJECT (dbin, "Link failed on pad %s:%s",
1913 GST_DEBUG_PAD_NAME (sinkpad));
1914 remove_error_filter (dbin, element);
1915 gst_object_unref (sinkpad);
1916 gst_bin_remove (GST_BIN (dbin), element);
1920 /* ... activate it ... */
1921 if ((gst_element_set_state (element,
1922 GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) {
1923 GST_WARNING_OBJECT (dbin, "Couldn't set %s to READY",
1924 GST_ELEMENT_NAME (element));
1925 remove_error_filter (dbin, element);
1926 gst_object_unref (sinkpad);
1927 gst_bin_remove (GST_BIN (dbin), element);
1931 /* Stop filtering errors. */
1932 remove_error_filter (dbin, element);
1934 gst_object_unref (sinkpad);
1935 GST_LOG_OBJECT (dbin, "linked on pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1937 CHAIN_MUTEX_LOCK (chain);
1938 delem = g_slice_new (GstDecodeElement);
1939 delem->element = gst_object_ref (element);
1940 delem->capsfilter = NULL;
1941 chain->elements = g_list_prepend (chain->elements, delem);
1942 chain->demuxer = is_demuxer_element (element);
1943 CHAIN_MUTEX_UNLOCK (chain);
1945 /* link this element further */
1946 connect_element (dbin, element, chain);
1948 /* try to configure the subtitle encoding property when we can */
1949 if (g_object_class_find_property (G_OBJECT_GET_CLASS (element),
1950 "subtitle-encoding")) {
1951 SUBTITLE_LOCK (dbin);
1952 GST_DEBUG_OBJECT (dbin,
1953 "setting subtitle-encoding=%s to element", dbin->encoding);
1954 g_object_set (G_OBJECT (element), "subtitle-encoding", dbin->encoding,
1956 SUBTITLE_UNLOCK (dbin);
1961 /* Bring the element to the state of the parent */
1962 if ((gst_element_set_state (element,
1963 GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE) {
1964 GstDecodeElement *dtmp = NULL;
1965 GstElement *tmp = NULL;
1967 GST_WARNING_OBJECT (dbin, "Couldn't set %s to PAUSED",
1968 GST_ELEMENT_NAME (element));
1970 /* Remove all elements in this chain that were just added. No
1971 * other thread could've added elements in the meantime */
1972 CHAIN_MUTEX_LOCK (chain);
1976 dtmp = chain->elements->data;
1977 tmp = dtmp->element;
1979 /* Disconnect any signal handlers that might be connected
1980 * in connect_element() or analyze_pad() */
1981 g_signal_handlers_disconnect_by_func (tmp, pad_added_cb, chain);
1982 g_signal_handlers_disconnect_by_func (tmp, pad_removed_cb, chain);
1983 g_signal_handlers_disconnect_by_func (tmp, no_more_pads_cb, chain);
1985 for (l = chain->pending_pads; l;) {
1986 GstPendingPad *pp = l->data;
1989 if (GST_PAD_PARENT (pp->pad) != tmp) {
1994 g_signal_handlers_disconnect_by_func (pp->pad, caps_notify_cb, chain);
1995 gst_pad_remove_event_probe (pp->pad, pp->event_probe_id);
1996 gst_object_unref (pp->pad);
1997 g_slice_free (GstPendingPad, pp);
1999 /* Remove element from the list, update list head and go to the
2000 * next element in the list */
2002 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2006 if (dtmp->capsfilter) {
2007 gst_bin_remove (GST_BIN (dbin), dtmp->capsfilter);
2008 gst_element_set_state (dtmp->capsfilter, GST_STATE_NULL);
2009 gst_object_unref (dtmp->capsfilter);
2012 gst_bin_remove (GST_BIN (dbin), tmp);
2013 gst_element_set_state (tmp, GST_STATE_NULL);
2015 gst_object_unref (tmp);
2016 g_slice_free (GstDecodeElement, dtmp);
2018 chain->elements = g_list_delete_link (chain->elements, chain->elements);
2019 } while (tmp != element);
2020 CHAIN_MUTEX_UNLOCK (chain);
2025 SUBTITLE_LOCK (dbin);
2026 /* we added the element now, add it to the list of subtitle-encoding
2027 * elements when we can set the property */
2028 dbin->subtitles = g_list_prepend (dbin->subtitles, element);
2029 SUBTITLE_UNLOCK (dbin);
2038 gst_object_unref (mqpad);
2044 get_pad_caps (GstPad * pad)
2048 /* first check the pad caps, if this is set, we are positively sure it is
2049 * fixed and exactly what the element will produce. */
2050 GST_OBJECT_LOCK (pad);
2051 if ((caps = GST_PAD_CAPS (pad)))
2052 gst_caps_ref (caps);
2053 GST_OBJECT_UNLOCK (pad);
2055 /* then use the getcaps function if we don't have caps. These caps might not
2056 * be fixed in some cases, in which case analyze_new_pad will set up a
2057 * notify::caps signal to continue autoplugging. */
2059 caps = gst_pad_get_caps_reffed (pad);
2065 connect_element (GstDecodeBin * dbin, GstElement * element,
2066 GstDecodeChain * chain)
2069 gboolean res = TRUE;
2070 gboolean dynamic = FALSE;
2071 GList *to_connect = NULL;
2073 GST_DEBUG_OBJECT (dbin, "Attempting to connect element %s [chain:%p] further",
2074 GST_ELEMENT_NAME (element), chain);
2076 /* 1. Loop over pad templates, grabbing existing pads along the way */
2077 for (pads = GST_ELEMENT_GET_CLASS (element)->padtemplates; pads;
2078 pads = g_list_next (pads)) {
2079 GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
2080 const gchar *templ_name;
2082 /* we are only interested in source pads */
2083 if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
2086 templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
2087 GST_DEBUG_OBJECT (dbin, "got a source pad template %s", templ_name);
2089 /* figure out what kind of pad this is */
2090 switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
2091 case GST_PAD_ALWAYS:
2093 /* get the pad that we need to autoplug */
2094 GstPad *pad = gst_element_get_static_pad (element, templ_name);
2097 GST_DEBUG_OBJECT (dbin, "got the pad for always template %s",
2099 /* here is the pad, we need to autoplug it */
2100 to_connect = g_list_prepend (to_connect, pad);
2102 /* strange, pad is marked as always but it's not
2103 * there. Fix the element */
2104 GST_WARNING_OBJECT (dbin,
2105 "could not get the pad for always template %s", templ_name);
2109 case GST_PAD_SOMETIMES:
2111 /* try to get the pad to see if it is already created or
2113 GstPad *pad = gst_element_get_static_pad (element, templ_name);
2116 GST_DEBUG_OBJECT (dbin, "got the pad for sometimes template %s",
2118 /* the pad is created, we need to autoplug it */
2119 to_connect = g_list_prepend (to_connect, pad);
2121 GST_DEBUG_OBJECT (dbin,
2122 "did not get the sometimes pad of template %s", templ_name);
2123 /* we have an element that will create dynamic pads */
2128 case GST_PAD_REQUEST:
2129 /* ignore request pads */
2130 GST_DEBUG_OBJECT (dbin, "ignoring request padtemplate %s", templ_name);
2135 /* 2. if there are more potential pads, connect to relevant signals */
2137 GST_LOG_OBJECT (dbin, "Adding signals to element %s in chain %p",
2138 GST_ELEMENT_NAME (element), chain);
2139 g_signal_connect (G_OBJECT (element), "pad-added",
2140 G_CALLBACK (pad_added_cb), chain);
2141 g_signal_connect (G_OBJECT (element), "pad-removed",
2142 G_CALLBACK (pad_removed_cb), chain);
2143 g_signal_connect (G_OBJECT (element), "no-more-pads",
2144 G_CALLBACK (no_more_pads_cb), chain);
2147 /* 3. for every available pad, connect it */
2148 for (pads = to_connect; pads; pads = g_list_next (pads)) {
2149 GstPad *pad = GST_PAD_CAST (pads->data);
2152 caps = get_pad_caps (pad);
2153 analyze_new_pad (dbin, element, pad, caps, chain);
2155 gst_caps_unref (caps);
2157 gst_object_unref (pad);
2159 g_list_free (to_connect);
2166 * Expose the given pad on the chain as a decoded pad.
2169 expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
2170 GstPad * pad, GstCaps * caps, GstDecodeChain * chain)
2172 GstPad *mqpad = NULL;
2174 GST_DEBUG_OBJECT (dbin, "pad %s:%s, chain:%p",
2175 GST_DEBUG_PAD_NAME (pad), chain);
2177 /* If this is the first pad for this chain, there are no other elements
2178 * and the source element is not the multiqueue we must link through the
2181 * This is the case if a demuxer directly exposed a raw pad.
2183 if (chain->parent && !chain->elements && src != chain->parent->multiqueue) {
2184 GST_LOG_OBJECT (src, "connecting the pad through multiqueue");
2186 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
2187 if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad)))
2190 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
2193 gst_decode_pad_activate (dpad, chain);
2194 chain->endpad = gst_object_ref (dpad);
2195 chain->endcaps = gst_caps_ref (caps);
2198 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2199 gst_decode_bin_expose (dbin);
2201 EXPOSE_UNLOCK (dbin);
2204 gst_object_unref (mqpad);
2210 /* check_upstream_seekable:
2212 * Check if upstream is seekable.
2215 check_upstream_seekable (GstDecodeBin * dbin, GstPad * pad)
2218 gint64 start = -1, stop = -1;
2219 gboolean seekable = FALSE;
2221 query = gst_query_new_seeking (GST_FORMAT_BYTES);
2222 if (!gst_pad_peer_query (pad, query)) {
2223 GST_DEBUG_OBJECT (dbin, "seeking query failed");
2224 gst_query_unref (query);
2228 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
2230 gst_query_unref (query);
2232 /* try harder to query upstream size if we didn't get it the first time */
2233 if (seekable && stop == -1) {
2234 GstFormat fmt = GST_FORMAT_BYTES;
2236 GST_DEBUG_OBJECT (dbin, "doing duration query to fix up unset stop");
2237 gst_pad_query_peer_duration (pad, &fmt, &stop);
2240 /* if upstream doesn't know the size, it's likely that it's not seekable in
2241 * practice even if it technically may be seekable */
2242 if (seekable && (start != 0 || stop <= start)) {
2243 GST_DEBUG_OBJECT (dbin, "seekable but unknown start/stop -> disable");
2247 GST_DEBUG_OBJECT (dbin, "upstream seekable: %d", seekable);
2252 type_found (GstElement * typefind, guint probability,
2253 GstCaps * caps, GstDecodeBin * decode_bin)
2255 GstPad *pad, *sink_pad;
2257 GST_DEBUG_OBJECT (decode_bin, "typefind found caps %" GST_PTR_FORMAT, caps);
2259 /* If the typefinder (but not something else) finds text/plain - i.e. that's
2260 * the top-level type of the file - then error out.
2262 if (gst_structure_has_name (gst_caps_get_structure (caps, 0), "text/plain")) {
2263 GST_ELEMENT_ERROR (decode_bin, STREAM, WRONG_TYPE,
2264 (_("This appears to be a text file")),
2265 ("decodebin2 cannot decode plain text files"));
2269 /* FIXME: we can only deal with one type, we don't yet support dynamically changing
2270 * caps from the typefind element */
2271 if (decode_bin->have_type || decode_bin->decode_chain)
2274 decode_bin->have_type = TRUE;
2276 pad = gst_element_get_static_pad (typefind, "src");
2277 sink_pad = gst_element_get_static_pad (typefind, "sink");
2279 /* need some lock here to prevent race with shutdown state change
2280 * which might yank away e.g. decode_chain while building stuff here.
2281 * In typical cases, STREAM_LOCK is held and handles that, it need not
2282 * be held (if called from a proxied setcaps), so grab it anyway */
2283 GST_PAD_STREAM_LOCK (sink_pad);
2284 decode_bin->decode_chain = gst_decode_chain_new (decode_bin, NULL, pad);
2285 analyze_new_pad (decode_bin, typefind, pad, caps, decode_bin->decode_chain);
2286 GST_PAD_STREAM_UNLOCK (sink_pad);
2288 gst_object_unref (sink_pad);
2289 gst_object_unref (pad);
2296 pad_event_cb (GstPad * pad, GstEvent * event, gpointer data)
2298 GstPendingPad *ppad = (GstPendingPad *) data;
2299 GstDecodeChain *chain = ppad->chain;
2300 GstDecodeBin *dbin = chain->dbin;
2305 switch (GST_EVENT_TYPE (event)) {
2307 GST_DEBUG_OBJECT (dbin, "Received EOS on a non final pad, this stream "
2309 chain->deadend = TRUE;
2310 /* we don't set the endcaps because NULL endcaps means early EOS */
2312 if (gst_decode_chain_is_complete (dbin->decode_chain))
2313 gst_decode_bin_expose (dbin);
2314 EXPOSE_UNLOCK (dbin);
2323 pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
2330 GST_DEBUG_OBJECT (pad, "pad added, chain:%p", chain);
2332 caps = get_pad_caps (pad);
2333 analyze_new_pad (dbin, element, pad, caps, chain);
2335 gst_caps_unref (caps);
2338 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2339 GST_LOG_OBJECT (dbin,
2340 "That was the last dynamic object, now attempting to expose the group");
2341 if (!gst_decode_bin_expose (dbin))
2342 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
2344 EXPOSE_UNLOCK (dbin);
2348 pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
2352 GST_LOG_OBJECT (pad, "pad removed, chain:%p", chain);
2354 /* In fact, we don't have to do anything here, the active group will be
2355 * removed when the group's multiqueue is drained */
2356 CHAIN_MUTEX_LOCK (chain);
2357 for (l = chain->pending_pads; l; l = l->next) {
2358 GstPendingPad *ppad = l->data;
2359 GstPad *opad = ppad->pad;
2362 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2363 gst_pending_pad_free (ppad);
2364 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2368 CHAIN_MUTEX_UNLOCK (chain);
2372 no_more_pads_cb (GstElement * element, GstDecodeChain * chain)
2374 GstDecodeGroup *group = NULL;
2376 GST_LOG_OBJECT (element, "got no more pads");
2378 CHAIN_MUTEX_LOCK (chain);
2379 if (!chain->elements
2380 || ((GstDecodeElement *) chain->elements->data)->element != element) {
2381 GST_LOG_OBJECT (chain->dbin, "no-more-pads from old chain element '%s'",
2382 GST_OBJECT_NAME (element));
2383 CHAIN_MUTEX_UNLOCK (chain);
2385 } else if (!chain->demuxer) {
2386 GST_LOG_OBJECT (chain->dbin, "no-more-pads from a non-demuxer element '%s'",
2387 GST_OBJECT_NAME (element));
2388 CHAIN_MUTEX_UNLOCK (chain);
2392 /* when we received no_more_pads, we can complete the pads of the chain */
2393 if (!chain->next_groups && chain->active_group) {
2394 group = chain->active_group;
2395 } else if (chain->next_groups) {
2396 group = chain->next_groups->data;
2399 GST_ERROR_OBJECT (chain->dbin, "can't find group for element");
2400 CHAIN_MUTEX_UNLOCK (chain);
2404 GST_DEBUG_OBJECT (element, "Setting group %p to complete", group);
2406 group->no_more_pads = TRUE;
2407 /* this group has prerolled enough to not need more pads,
2408 * we can probably set its buffering state to playing now */
2409 GST_DEBUG_OBJECT (group->dbin, "Setting group %p multiqueue to "
2410 "'playing' buffering mode", group);
2411 decodebin_set_queue_size (group->dbin, group->multiqueue, FALSE,
2412 (group->parent ? group->parent->seekable : TRUE));
2413 CHAIN_MUTEX_UNLOCK (chain);
2415 EXPOSE_LOCK (chain->dbin);
2416 if (gst_decode_chain_is_complete (chain->dbin->decode_chain)) {
2417 gst_decode_bin_expose (chain->dbin);
2419 EXPOSE_UNLOCK (chain->dbin);
2423 caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeChain * chain)
2425 GstElement *element;
2428 GST_LOG_OBJECT (pad, "Notified caps for pad %s:%s", GST_DEBUG_PAD_NAME (pad));
2430 /* Disconnect this; if we still need it, we'll reconnect to this in
2431 * analyze_new_pad */
2432 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2434 element = GST_ELEMENT_CAST (gst_pad_get_parent (pad));
2436 CHAIN_MUTEX_LOCK (chain);
2437 for (l = chain->pending_pads; l; l = l->next) {
2438 GstPendingPad *ppad = l->data;
2439 if (ppad->pad == pad) {
2440 gst_pending_pad_free (ppad);
2441 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2445 CHAIN_MUTEX_UNLOCK (chain);
2447 pad_added_cb (element, pad, chain);
2449 gst_object_unref (element);
2452 /* Decide whether an element is a demuxer based on the
2453 * klass and number/type of src pad templates it has */
2455 is_demuxer_element (GstElement * srcelement)
2457 GstElementFactory *srcfactory;
2458 GstElementClass *elemclass;
2461 gint potential_src_pads = 0;
2463 srcfactory = gst_element_get_factory (srcelement);
2464 klass = gst_element_factory_get_klass (srcfactory);
2466 /* Can't be a demuxer unless it has Demux in the klass name */
2467 if (!strstr (klass, "Demux"))
2470 /* Walk the src pad templates and count how many the element
2472 elemclass = GST_ELEMENT_GET_CLASS (srcelement);
2474 walk = gst_element_class_get_pad_template_list (elemclass);
2475 while (walk != NULL) {
2476 GstPadTemplate *templ;
2478 templ = (GstPadTemplate *) walk->data;
2479 if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
2480 switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
2481 case GST_PAD_ALWAYS:
2482 case GST_PAD_SOMETIMES:
2483 if (strstr (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), "%"))
2484 potential_src_pads += 2; /* Might make multiple pads */
2486 potential_src_pads += 1;
2488 case GST_PAD_REQUEST:
2489 potential_src_pads += 2;
2493 walk = g_list_next (walk);
2496 if (potential_src_pads < 2)
2502 /* Returns TRUE if the caps are compatible with the caps specified in the 'caps'
2503 * property (which by default are the raw caps)
2505 * The decodebin_lock should be taken !
2508 are_final_caps (GstDecodeBin * dbin, GstCaps * caps)
2512 GST_LOG_OBJECT (dbin, "Checking with caps %" GST_PTR_FORMAT, caps);
2514 /* lock for getting the caps */
2515 GST_OBJECT_LOCK (dbin);
2516 res = gst_caps_can_intersect (dbin->caps, caps);
2517 GST_OBJECT_UNLOCK (dbin);
2519 GST_LOG_OBJECT (dbin, "Caps are %sfinal caps", res ? "" : "not ");
2525 * GstDecodeChain functions
2528 /* gst_decode_chain_get_current_group:
2530 * Returns the current group of this chain, to which
2531 * new chains should be attached or NULL if the last
2532 * group didn't have no-more-pads.
2534 * Not MT-safe: Call with parent chain lock!
2536 static GstDecodeGroup *
2537 gst_decode_chain_get_current_group (GstDecodeChain * chain)
2539 GstDecodeGroup *group;
2541 if (!chain->next_groups && chain->active_group
2542 && chain->active_group->overrun && !chain->active_group->no_more_pads) {
2543 GST_WARNING_OBJECT (chain->dbin,
2544 "Currently active group %p is exposed"
2545 " and wants to add a new pad without having signaled no-more-pads",
2546 chain->active_group);
2550 if (chain->next_groups && (group = chain->next_groups->data) && group->overrun
2551 && !group->no_more_pads) {
2552 GST_WARNING_OBJECT (chain->dbin,
2553 "Currently newest pending group %p "
2554 "had overflow but didn't signal no-more-pads", group);
2558 /* Now we know that we can really return something useful */
2559 if (!chain->active_group) {
2560 chain->active_group = group = gst_decode_group_new (chain->dbin, chain);
2561 } else if (!chain->active_group->overrun
2562 && !chain->active_group->no_more_pads) {
2563 group = chain->active_group;
2564 } else if (chain->next_groups && (group = chain->next_groups->data)
2565 && !group->overrun && !group->no_more_pads) {
2566 /* group = chain->next_groups->data */
2568 group = gst_decode_group_new (chain->dbin, chain);
2569 chain->next_groups = g_list_prepend (chain->next_groups, group);
2575 static void gst_decode_group_free_internal (GstDecodeGroup * group,
2579 gst_decode_chain_free_internal (GstDecodeChain * chain, gboolean hide)
2583 CHAIN_MUTEX_LOCK (chain);
2585 GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hiding" : "Freeing"),
2588 if (chain->active_group) {
2589 gst_decode_group_free_internal (chain->active_group, hide);
2591 chain->active_group = NULL;
2594 for (l = chain->next_groups; l; l = l->next) {
2595 gst_decode_group_free_internal ((GstDecodeGroup *) l->data, hide);
2600 g_list_free (chain->next_groups);
2601 chain->next_groups = NULL;
2605 for (l = chain->old_groups; l; l = l->next) {
2606 GstDecodeGroup *group = l->data;
2608 gst_decode_group_free (group);
2610 g_list_free (chain->old_groups);
2611 chain->old_groups = NULL;
2614 for (l = chain->pending_pads; l; l = l->next) {
2615 GstPendingPad *ppad = l->data;
2616 GstPad *pad = ppad->pad;
2618 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2619 gst_pending_pad_free (ppad);
2622 g_list_free (chain->pending_pads);
2623 chain->pending_pads = NULL;
2625 for (l = chain->elements; l; l = l->next) {
2626 GstDecodeElement *delem = l->data;
2627 GstElement *element = delem->element;
2629 g_signal_handlers_disconnect_by_func (element, pad_added_cb, chain);
2630 g_signal_handlers_disconnect_by_func (element, pad_removed_cb, chain);
2631 g_signal_handlers_disconnect_by_func (element, no_more_pads_cb, chain);
2633 if (delem->capsfilter) {
2634 if (GST_OBJECT_PARENT (delem->capsfilter) ==
2635 GST_OBJECT_CAST (chain->dbin))
2636 gst_bin_remove (GST_BIN_CAST (chain->dbin), delem->capsfilter);
2638 gst_element_set_state (delem->capsfilter, GST_STATE_NULL);
2642 if (GST_OBJECT_PARENT (element) == GST_OBJECT_CAST (chain->dbin))
2643 gst_bin_remove (GST_BIN_CAST (chain->dbin), element);
2645 gst_element_set_state (element, GST_STATE_NULL);
2648 SUBTITLE_LOCK (chain->dbin);
2649 /* remove possible subtitle element */
2650 chain->dbin->subtitles = g_list_remove (chain->dbin->subtitles, element);
2651 SUBTITLE_UNLOCK (chain->dbin);
2654 if (delem->capsfilter) {
2655 gst_object_unref (delem->capsfilter);
2656 delem->capsfilter = NULL;
2659 gst_object_unref (element);
2662 g_slice_free (GstDecodeElement, delem);
2666 g_list_free (chain->elements);
2667 chain->elements = NULL;
2670 if (chain->endpad) {
2671 if (chain->endpad->exposed) {
2672 gst_element_remove_pad (GST_ELEMENT_CAST (chain->dbin),
2673 GST_PAD_CAST (chain->endpad));
2674 g_signal_emit (G_OBJECT (chain->dbin),
2675 gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD], 0, chain->endpad);
2678 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->endpad), NULL);
2679 chain->endpad->exposed = FALSE;
2681 gst_object_unref (chain->endpad);
2682 chain->endpad = NULL;
2687 gst_object_unref (chain->pad);
2691 if (chain->endcaps) {
2692 gst_caps_unref (chain->endcaps);
2693 chain->endcaps = NULL;
2696 GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hidden" : "Freed"),
2698 CHAIN_MUTEX_UNLOCK (chain);
2700 g_mutex_free (chain->lock);
2701 g_slice_free (GstDecodeChain, chain);
2705 /* gst_decode_chain_free:
2707 * Completely frees and removes the chain and all
2708 * child groups from decodebin2.
2710 * MT-safe, don't hold the chain lock or any child chain's lock
2711 * when calling this!
2714 gst_decode_chain_free (GstDecodeChain * chain)
2716 gst_decode_chain_free_internal (chain, FALSE);
2719 /* gst_decode_chain_new:
2721 * Creates a new decode chain and initializes it.
2723 * It's up to the caller to add it to the list of child chains of
2726 static GstDecodeChain *
2727 gst_decode_chain_new (GstDecodeBin * dbin, GstDecodeGroup * parent,
2730 GstDecodeChain *chain = g_slice_new0 (GstDecodeChain);
2732 GST_DEBUG_OBJECT (dbin, "Creating new chain %p with parent group %p", chain,
2736 chain->parent = parent;
2737 chain->lock = g_mutex_new ();
2738 chain->pad = gst_object_ref (pad);
2744 * GstDecodeGroup functions
2747 /* The overrun callback is used to expose groups that have not yet had their
2748 * no_more_pads called while the (large) multiqueue overflowed. When this
2749 * happens we must assume that the no_more_pads will not arrive anymore and we
2750 * must expose the pads that we have.
2753 multi_queue_overrun_cb (GstElement * queue, GstDecodeGroup * group)
2759 GST_LOG_OBJECT (dbin, "multiqueue '%s' (%p) is full", GST_OBJECT_NAME (queue),
2762 group->overrun = TRUE;
2763 /* this group has prerolled enough to not need more pads,
2764 * we can probably set its buffering state to playing now */
2765 GST_DEBUG_OBJECT (group->dbin, "Setting group %p multiqueue to "
2766 "'playing' buffering mode", group);
2767 decodebin_set_queue_size (group->dbin, group->multiqueue, FALSE,
2768 (group->parent ? group->parent->seekable : TRUE));
2770 /* FIXME: We should make sure that everything gets exposed now
2771 * even if child chains are not complete because the will never
2772 * be complete! Ignore any non-complete chains when exposing
2773 * and never expose them later
2777 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2778 if (!gst_decode_bin_expose (dbin))
2779 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
2781 EXPOSE_UNLOCK (group->dbin);
2785 gst_decode_group_free_internal (GstDecodeGroup * group, gboolean hide)
2789 GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hiding" : "Freeing"),
2791 for (l = group->children; l; l = l->next) {
2792 GstDecodeChain *chain = (GstDecodeChain *) l->data;
2794 gst_decode_chain_free_internal (chain, hide);
2799 g_list_free (group->children);
2800 group->children = NULL;
2804 for (l = group->reqpads; l; l = l->next) {
2805 GstPad *pad = l->data;
2807 gst_element_release_request_pad (group->multiqueue, pad);
2808 gst_object_unref (pad);
2811 g_list_free (group->reqpads);
2812 group->reqpads = NULL;
2815 if (group->multiqueue) {
2816 if (group->overrunsig) {
2817 g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
2818 group->overrunsig = 0;
2821 if (GST_OBJECT_PARENT (group->multiqueue) == GST_OBJECT_CAST (group->dbin))
2822 gst_bin_remove (GST_BIN_CAST (group->dbin), group->multiqueue);
2824 gst_element_set_state (group->multiqueue, GST_STATE_NULL);
2825 gst_object_unref (group->multiqueue);
2826 group->multiqueue = NULL;
2830 GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hided" : "Freed"),
2833 g_slice_free (GstDecodeGroup, group);
2836 /* gst_decode_group_free:
2838 * Completely frees and removes the decode group and all
2841 * Never call this from any streaming thread!
2843 * Not MT-safe, call with parent's chain lock!
2846 gst_decode_group_free (GstDecodeGroup * group)
2848 gst_decode_group_free_internal (group, FALSE);
2851 /* gst_decode_group_hide:
2853 * Hide the decode group only, this means that
2854 * all child endpads are removed from decodebin2
2855 * and all signals are unconnected.
2857 * No element is set to NULL state and completely
2860 * Can be called from streaming threads.
2862 * Not MT-safe, call with parent's chain lock!
2865 gst_decode_group_hide (GstDecodeGroup * group)
2867 gst_decode_group_free_internal (group, TRUE);
2870 /* configure queue sizes, this depends on the buffering method and if we are
2871 * playing or prerolling. */
2873 decodebin_set_queue_size (GstDecodeBin * dbin, GstElement * multiqueue,
2874 gboolean preroll, gboolean seekable)
2876 guint max_bytes, max_buffers;
2879 if (preroll || dbin->use_buffering) {
2880 /* takes queue limits, initially we only queue up up to the max bytes limit,
2881 * with a default of 2MB. we use the same values for buffering mode. */
2882 if ((max_bytes = dbin->max_size_bytes) == 0)
2883 max_bytes = AUTO_PREROLL_SIZE_BYTES;
2884 if ((max_buffers = dbin->max_size_buffers) == 0)
2885 max_buffers = AUTO_PREROLL_SIZE_BUFFERS;
2886 if ((max_time = dbin->max_size_time) == 0)
2887 max_time = seekable ? AUTO_PREROLL_SEEKABLE_SIZE_TIME :
2888 AUTO_PREROLL_NOT_SEEKABLE_SIZE_TIME;
2890 /* update runtime limits. At runtime, we try to keep the amount of buffers
2891 * in the queues as low as possible (but at least 5 buffers). */
2892 if ((max_bytes = dbin->max_size_bytes) == 0)
2893 max_bytes = AUTO_PLAY_SIZE_BYTES;
2894 if ((max_buffers = dbin->max_size_buffers) == 0)
2895 max_buffers = AUTO_PLAY_SIZE_BUFFERS;
2896 if ((max_time = dbin->max_size_time) == 0)
2897 max_time = AUTO_PLAY_SIZE_TIME;
2900 g_object_set (multiqueue,
2901 "max-size-bytes", max_bytes, "max-size-time", max_time,
2902 "max-size-buffers", max_buffers, NULL);
2905 /* gst_decode_group_new:
2906 * @dbin: Parent decodebin
2907 * @parent: Parent chain or %NULL
2909 * Creates a new GstDecodeGroup. It is up to the caller to add it to the list
2912 static GstDecodeGroup *
2913 gst_decode_group_new (GstDecodeBin * dbin, GstDecodeChain * parent)
2915 GstDecodeGroup *group = g_slice_new0 (GstDecodeGroup);
2919 GST_DEBUG_OBJECT (dbin, "Creating new group %p with parent chain %p", group,
2923 group->parent = parent;
2925 mq = group->multiqueue = gst_element_factory_make ("multiqueue", NULL);
2926 if (G_UNLIKELY (!group->multiqueue))
2927 goto missing_multiqueue;
2929 /* default is for use-buffering is FALSE */
2930 if (dbin->use_buffering) {
2932 "use-buffering", TRUE,
2933 "low-percent", dbin->low_percent,
2934 "high-percent", dbin->high_percent, NULL);
2937 /* configure queue sizes for preroll */
2939 if (parent && parent->demuxer) {
2940 GstElement *element =
2941 ((GstDecodeElement *) parent->elements->data)->element;
2942 GstPad *pad = gst_element_get_static_pad (element, "sink");
2944 seekable = parent->seekable = check_upstream_seekable (dbin, pad);
2945 gst_object_unref (pad);
2948 decodebin_set_queue_size (dbin, mq, TRUE, seekable);
2950 group->overrunsig = g_signal_connect (G_OBJECT (mq), "overrun",
2951 G_CALLBACK (multi_queue_overrun_cb), group);
2953 gst_bin_add (GST_BIN (dbin), gst_object_ref (mq));
2954 gst_element_set_state (mq, GST_STATE_PAUSED);
2961 gst_element_post_message (GST_ELEMENT_CAST (dbin),
2962 gst_missing_element_message_new (GST_ELEMENT_CAST (dbin),
2964 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no multiqueue!"));
2965 g_slice_free (GstDecodeGroup, group);
2970 /* gst_decode_group_control_demuxer_pad
2972 * Adds a new demuxer srcpad to the given group.
2974 * Returns the srcpad of the multiqueue corresponding the given pad.
2975 * Returns NULL if there was an error.
2978 gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, GstPad * pad)
2981 GstPad *srcpad, *sinkpad;
2982 GstIterator *it = NULL;
2986 GST_LOG_OBJECT (dbin, "group:%p pad %s:%s", group, GST_DEBUG_PAD_NAME (pad));
2990 if (G_UNLIKELY (!group->multiqueue))
2993 if (!(sinkpad = gst_element_get_request_pad (group->multiqueue, "sink%d"))) {
2994 GST_ERROR_OBJECT (dbin, "Couldn't get sinkpad from multiqueue");
2998 if ((gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)) {
2999 GST_ERROR_OBJECT (dbin, "Couldn't link demuxer and multiqueue");
3003 it = gst_pad_iterate_internal_links (sinkpad);
3005 if (!it || (gst_iterator_next (it, (gpointer) & srcpad)) != GST_ITERATOR_OK
3006 || srcpad == NULL) {
3007 GST_ERROR_OBJECT (dbin,
3008 "Couldn't get srcpad from multiqueue for sinkpad %" GST_PTR_FORMAT,
3013 CHAIN_MUTEX_LOCK (group->parent);
3014 group->reqpads = g_list_prepend (group->reqpads, gst_object_ref (sinkpad));
3015 CHAIN_MUTEX_UNLOCK (group->parent);
3019 gst_iterator_free (it);
3020 gst_object_unref (sinkpad);
3024 gst_element_release_request_pad (group->multiqueue, sinkpad);
3028 /* gst_decode_group_is_complete:
3030 * Checks if the group is complete, this means that
3031 * a) overrun of the multiqueue or no-more-pads happened
3032 * b) all child chains are complete
3034 * Not MT-safe, always call with decodebin expose lock
3037 gst_decode_group_is_complete (GstDecodeGroup * group)
3040 gboolean complete = TRUE;
3042 if (!group->overrun && !group->no_more_pads) {
3047 for (l = group->children; l; l = l->next) {
3048 GstDecodeChain *chain = l->data;
3050 if (!gst_decode_chain_is_complete (chain)) {
3057 GST_DEBUG_OBJECT (group->dbin, "Group %p is complete: %d", group, complete);
3061 /* gst_decode_chain_is_complete:
3063 * Returns TRUE if the chain is complete, this means either
3064 * a) This chain is a dead end, i.e. we have no suitable plugins
3065 * b) This chain ends in an endpad and this is blocked or exposed
3067 * Not MT-safe, always call with decodebin expose lock
3070 gst_decode_chain_is_complete (GstDecodeChain * chain)
3072 gboolean complete = FALSE;
3074 CHAIN_MUTEX_LOCK (chain);
3075 if (chain->deadend) {
3080 if (chain->endpad && (chain->endpad->blocked || chain->endpad->exposed)) {
3085 if (chain->demuxer) {
3086 if (chain->active_group
3087 && gst_decode_group_is_complete (chain->active_group)) {
3094 CHAIN_MUTEX_UNLOCK (chain);
3095 GST_DEBUG_OBJECT (chain->dbin, "Chain %p is complete: %d", chain, complete);
3100 drain_and_switch_chains (GstDecodeChain * chain, GstDecodePad * drainpad,
3101 gboolean * last_group, gboolean * drained, gboolean * switched);
3102 /* drain_and_switch_chains/groups:
3104 * CALL WITH CHAIN LOCK (or group parent) TAKEN !
3106 * Goes down the chains/groups until it finds the chain
3107 * to which the drainpad belongs.
3109 * It marks that pad/chain as drained and then will figure
3110 * out which group to switch to or not.
3112 * last_chain will be set to TRUE if the group to which the
3113 * pad belongs is the last one.
3115 * drained will be set to TRUE if the chain/group is drained.
3117 * Returns: TRUE if the chain contained the target pad */
3119 drain_and_switch_group (GstDecodeGroup * group, GstDecodePad * drainpad,
3120 gboolean * last_group, gboolean * drained, gboolean * switched)
3122 gboolean handled = FALSE;
3123 gboolean alldrained = TRUE;
3126 GST_DEBUG ("Checking group %p (target pad %s:%s)",
3127 group, GST_DEBUG_PAD_NAME (drainpad));
3129 /* Definitely can't be in drained groups */
3130 if (G_UNLIKELY (group->drained)) {
3134 /* Figure out if all our chains are drained with the
3135 * new information */
3136 for (tmp = group->children; tmp; tmp = tmp->next) {
3137 GstDecodeChain *chain = (GstDecodeChain *) tmp->data;
3138 gboolean subdrained = FALSE;
3141 drain_and_switch_chains (chain, drainpad, last_group, &subdrained,
3148 GST_DEBUG ("group %p (last_group:%d, drained:%d, switched:%d, handled:%d)",
3149 group, *last_group, alldrained, *switched, handled);
3150 *drained = alldrained;
3155 drain_and_switch_chains (GstDecodeChain * chain, GstDecodePad * drainpad,
3156 gboolean * last_group, gboolean * drained, gboolean * switched)
3158 gboolean handled = FALSE;
3159 GstDecodeBin *dbin = chain->dbin;
3161 GST_DEBUG ("Checking chain %p (target pad %s:%s)",
3162 chain, GST_DEBUG_PAD_NAME (drainpad));
3164 CHAIN_MUTEX_LOCK (chain);
3166 if (chain->endpad) {
3167 /* Check if we're reached the target endchain */
3168 if (chain == drainpad->chain) {
3169 GST_DEBUG ("Found the target chain");
3170 drainpad->drained = TRUE;
3174 *drained = chain->endpad->drained;
3178 /* We known there are groups to switch to */
3179 if (chain->next_groups)
3180 *last_group = FALSE;
3182 /* Check the active group */
3183 if (chain->active_group) {
3184 gboolean subdrained = FALSE;
3185 handled = drain_and_switch_group (chain->active_group, drainpad,
3186 last_group, &subdrained, switched);
3188 /* The group is drained, see if we can switch to another */
3189 if (handled && subdrained && !*switched) {
3190 if (chain->next_groups) {
3191 /* Switch to next group */
3192 GST_DEBUG_OBJECT (dbin, "Hiding current group %p", chain->active_group);
3193 gst_decode_group_hide (chain->active_group);
3195 g_list_prepend (chain->old_groups, chain->active_group);
3196 GST_DEBUG_OBJECT (dbin, "Switching to next group %p",
3197 chain->next_groups->data);
3198 chain->active_group = chain->next_groups->data;
3199 chain->next_groups =
3200 g_list_delete_link (chain->next_groups, chain->next_groups);
3204 GST_DEBUG ("Group %p was the last in chain %p", chain->active_group,
3207 /* We're drained ! */
3213 CHAIN_MUTEX_UNLOCK (chain);
3215 GST_DEBUG ("Chain %p (handled:%d, last_group:%d, drained:%d, switched:%d)",
3216 chain, handled, *last_group, *drained, *switched);
3219 g_signal_emit (dbin, gst_decode_bin_signals[SIGNAL_DRAINED], 0, NULL);
3224 /* check if the group is drained, meaning all pads have seen an EOS
3227 gst_decode_pad_handle_eos (GstDecodePad * pad)
3229 gboolean last_group = TRUE;
3230 gboolean switched = FALSE;
3231 gboolean drained = FALSE;
3232 GstDecodeChain *chain = pad->chain;
3233 GstDecodeBin *dbin = chain->dbin;
3235 GST_LOG_OBJECT (dbin, "pad %p", pad);
3236 drain_and_switch_chains (dbin->decode_chain, pad, &last_group, &drained,
3240 /* If we resulted in a group switch, expose what's needed */
3242 if (gst_decode_chain_is_complete (dbin->decode_chain))
3243 gst_decode_bin_expose (dbin);
3244 EXPOSE_UNLOCK (dbin);
3250 /* gst_decode_group_is_drained:
3252 * Check is this group is drained and cache this result.
3253 * The group is drained if all child chains are drained.
3255 * Not MT-safe, call with group->parent's lock */
3257 gst_decode_group_is_drained (GstDecodeGroup * group)
3260 gboolean drained = TRUE;
3262 if (group->drained) {
3267 for (l = group->children; l; l = l->next) {
3268 GstDecodeChain *chain = l->data;
3270 CHAIN_MUTEX_LOCK (chain);
3271 if (!gst_decode_chain_is_drained (chain))
3273 CHAIN_MUTEX_UNLOCK (chain);
3277 group->drained = drained;
3280 GST_DEBUG_OBJECT (group->dbin, "Group %p is drained: %d", group, drained);
3284 /* gst_decode_chain_is_drained:
3286 * Check is the chain is drained, which means that
3289 * a) it's endpad is drained
3290 * b) there are no pending pads, the active group is drained
3291 * and there are no next groups
3293 * Not MT-safe, call with chain lock
3296 gst_decode_chain_is_drained (GstDecodeChain * chain)
3298 gboolean drained = FALSE;
3300 if (chain->endpad) {
3301 drained = chain->endpad->drained;
3305 if (chain->pending_pads) {
3310 if (chain->active_group && gst_decode_group_is_drained (chain->active_group)
3311 && !chain->next_groups) {
3317 GST_DEBUG_OBJECT (chain->dbin, "Chain %p is drained: %d", chain, drained);
3322 * GCompareFunc to use with lists of GstPad.
3323 * Sorts pads by mime type.
3324 * First video (raw, then non-raw), then audio (raw, then non-raw),
3327 * Return: negative if a<b, 0 if a==b, positive if a>b
3330 sort_end_pads (GstDecodePad * da, GstDecodePad * db)
3333 GstCaps *capsa, *capsb;
3334 GstStructure *sa, *sb;
3335 const gchar *namea, *nameb;
3337 capsa = get_pad_caps (GST_PAD_CAST (da));
3338 capsb = get_pad_caps (GST_PAD_CAST (db));
3340 sa = gst_caps_get_structure ((const GstCaps *) capsa, 0);
3341 sb = gst_caps_get_structure ((const GstCaps *) capsb, 0);
3343 namea = gst_structure_get_name (sa);
3344 nameb = gst_structure_get_name (sb);
3346 if (g_strrstr (namea, "video/x-raw-"))
3348 else if (g_strrstr (namea, "video/"))
3350 else if (g_strrstr (namea, "audio/x-raw"))
3352 else if (g_strrstr (namea, "audio/"))
3357 if (g_strrstr (nameb, "video/x-raw-"))
3359 else if (g_strrstr (nameb, "video/"))
3361 else if (g_strrstr (nameb, "audio/x-raw"))
3363 else if (g_strrstr (nameb, "audio/"))
3368 gst_caps_unref (capsa);
3369 gst_caps_unref (capsb);
3375 _gst_element_get_linked_caps (GstElement * src, GstElement * sink,
3381 gboolean done = FALSE;
3382 GstCaps *caps = NULL;
3384 it = gst_element_iterate_src_pads (src);
3386 switch (gst_iterator_next (it, (gpointer) & pad)) {
3387 case GST_ITERATOR_OK:
3388 peer = gst_pad_get_peer (pad);
3390 parent = gst_pad_get_parent_element (peer);
3391 if (parent == sink) {
3392 caps = gst_pad_get_negotiated_caps (pad);
3394 gst_object_ref (pad);
3401 gst_object_unref (parent);
3402 gst_object_unref (peer);
3404 gst_object_unref (pad);
3406 case GST_ITERATOR_RESYNC:
3407 gst_iterator_resync (it);
3409 case GST_ITERATOR_ERROR:
3410 case GST_ITERATOR_DONE:
3416 gst_iterator_free (it);
3421 static GQuark topology_structure_name = 0;
3422 static GQuark topology_caps = 0;
3423 static GQuark topology_next = 0;
3424 static GQuark topology_pad = 0;
3425 static GQuark topology_element_srcpad = 0;
3427 /* FIXME: Invent gst_structure_take_structure() to prevent all the
3428 * structure copying for nothing
3430 static GstStructure *
3431 gst_decode_chain_get_topology (GstDecodeChain * chain)
3433 GstStructure *s, *u;
3437 if (G_UNLIKELY ((chain->endpad || chain->deadend)
3438 && (chain->endcaps == NULL))) {
3439 GST_WARNING ("End chain without valid caps !");
3443 u = gst_structure_id_empty_new (topology_structure_name);
3445 /* Now at the last element */
3446 if ((chain->elements || !chain->active_group) &&
3447 (chain->endpad || chain->deadend)) {
3448 s = gst_structure_id_empty_new (topology_structure_name);
3449 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, chain->endcaps,
3452 if (chain->endpad) {
3453 gst_structure_id_set (u, topology_pad, GST_TYPE_PAD, chain->endpad, NULL);
3454 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD,
3455 chain->endpad, NULL);
3457 gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL);
3458 gst_structure_free (u);
3460 } else if (chain->active_group) {
3461 GValue list = { 0, };
3462 GValue item = { 0, };
3464 g_value_init (&list, GST_TYPE_LIST);
3465 g_value_init (&item, GST_TYPE_STRUCTURE);
3466 for (l = chain->active_group->children; l; l = l->next) {
3467 s = gst_decode_chain_get_topology (l->data);
3469 gst_value_set_structure (&item, s);
3470 gst_value_list_append_value (&list, &item);
3471 g_value_reset (&item);
3472 gst_structure_free (s);
3475 gst_structure_id_set_value (u, topology_next, &list);
3476 g_value_unset (&list);
3477 g_value_unset (&item);
3480 /* Get caps between all elements in this chain */
3481 l = (chain->elements && chain->elements->next) ? chain->elements : NULL;
3482 for (; l && l->next; l = l->next) {
3483 GstDecodeElement *delem, *delem_next;
3484 GstElement *elem, *elem_next;
3489 elem = delem->element;
3490 delem_next = l->next->data;
3491 elem_next = delem_next->element;
3494 caps = _gst_element_get_linked_caps (elem_next, elem, &srcpad);
3497 s = gst_structure_id_empty_new (topology_structure_name);
3498 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL);
3499 gst_caps_unref (caps);
3501 gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL);
3502 gst_structure_free (u);
3507 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, srcpad,
3509 gst_object_unref (srcpad);
3513 /* Caps that resulted in this chain */
3514 caps = gst_pad_get_negotiated_caps (chain->pad);
3516 caps = get_pad_caps (chain->pad);
3517 if (G_UNLIKELY (!gst_caps_is_fixed (caps))) {
3518 GST_ERROR_OBJECT (chain->pad,
3519 "Couldn't get fixed caps, got %" GST_PTR_FORMAT, caps);
3520 gst_caps_unref (caps);
3524 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL);
3525 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, chain->pad,
3527 gst_caps_unref (caps);
3533 gst_decode_bin_post_topology_message (GstDecodeBin * dbin)
3538 s = gst_decode_chain_get_topology (dbin->decode_chain);
3540 msg = gst_message_new_element (GST_OBJECT (dbin), s);
3541 gst_element_post_message (GST_ELEMENT (dbin), msg);
3544 /* Must only be called if the toplevel chain is complete and blocked! */
3545 /* Not MT-safe, call with decodebin expose lock! */
3547 gst_decode_bin_expose (GstDecodeBin * dbin)
3549 GList *tmp, *endpads = NULL;
3550 gboolean missing_plugin = FALSE;
3551 gboolean already_exposed = TRUE;
3553 GST_DEBUG_OBJECT (dbin, "Exposing currently active chains/groups");
3555 /* Don't expose if we're currently shutting down */
3557 if (G_UNLIKELY (dbin->shutdown == TRUE)) {
3558 GST_WARNING_OBJECT (dbin, "Currently, shutting down, aborting exposing");
3564 /* Get the pads that we're going to expose and mark things as exposed */
3565 if (!gst_decode_chain_expose (dbin->decode_chain, &endpads, &missing_plugin)) {
3566 g_list_foreach (endpads, (GFunc) gst_object_unref, NULL);
3567 g_list_free (endpads);
3568 GST_ERROR_OBJECT (dbin, "Broken chain/group tree");
3569 g_return_val_if_reached (FALSE);
3572 if (endpads == NULL) {
3573 if (missing_plugin) {
3574 GST_WARNING_OBJECT (dbin, "No suitable plugins found");
3575 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL),
3576 ("no suitable plugins found"));
3578 /* in this case, the stream ended without buffers,
3579 * just post a warning */
3580 GST_WARNING_OBJECT (dbin, "All streams finished without buffers");
3581 GST_ELEMENT_ERROR (dbin, STREAM, FAILED, (NULL),
3582 ("all streams without buffers"));
3587 /* Check if this was called when everything was exposed already */
3588 for (tmp = endpads; tmp && already_exposed; tmp = tmp->next) {
3589 GstDecodePad *dpad = tmp->data;
3591 already_exposed &= dpad->exposed;
3592 if (!already_exposed)
3595 if (already_exposed) {
3596 GST_DEBUG_OBJECT (dbin, "Everything was exposed already!");
3597 g_list_foreach (endpads, (GFunc) gst_object_unref, NULL);
3598 g_list_free (endpads);
3602 /* Set all already exposed pads to blocked */
3603 for (tmp = endpads; tmp; tmp = tmp->next) {
3604 GstDecodePad *dpad = tmp->data;
3606 if (dpad->exposed) {
3607 GST_DEBUG_OBJECT (dpad, "blocking exposed pad");
3608 gst_decode_pad_set_blocked (dpad, TRUE);
3612 /* re-order pads : video, then audio, then others */
3613 endpads = g_list_sort (endpads, (GCompareFunc) sort_end_pads);
3616 for (tmp = endpads; tmp; tmp = tmp->next) {
3617 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
3620 /* 1. rewrite name */
3621 padname = g_strdup_printf ("src%d", dbin->nbpads);
3623 GST_DEBUG_OBJECT (dbin, "About to expose dpad %s as %s",
3624 GST_OBJECT_NAME (dpad), padname);
3625 gst_object_set_name (GST_OBJECT (dpad), padname);
3628 /* 2. activate and add */
3630 && !gst_element_add_pad (GST_ELEMENT (dbin), GST_PAD_CAST (dpad))) {
3631 /* not really fatal, we can try to add the other pads */
3632 g_warning ("error adding pad to decodebin2");
3635 dpad->exposed = TRUE;
3637 /* 3. emit signal */
3638 GST_DEBUG_OBJECT (dbin, "emitting new-decoded-pad");
3639 g_signal_emit (G_OBJECT (dbin),
3640 gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, dpad,
3641 (tmp->next == NULL));
3642 GST_DEBUG_OBJECT (dbin, "emitted new-decoded-pad");
3645 /* 4. Signal no-more-pads. This allows the application to hook stuff to the
3647 GST_LOG_OBJECT (dbin, "signaling no-more-pads");
3648 gst_element_no_more_pads (GST_ELEMENT (dbin));
3650 /* 5. Send a custom element message with the stream topology */
3651 if (dbin->post_stream_topology)
3652 gst_decode_bin_post_topology_message (dbin);
3654 /* 6. Unblock internal pads. The application should have connected stuff now
3655 * so that streaming can continue. */
3656 for (tmp = endpads; tmp; tmp = tmp->next) {
3657 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
3659 GST_DEBUG_OBJECT (dpad, "unblocking");
3660 gst_decode_pad_unblock (dpad);
3661 GST_DEBUG_OBJECT (dpad, "unblocked");
3662 gst_object_unref (dpad);
3664 g_list_free (endpads);
3666 do_async_done (dbin);
3667 GST_DEBUG_OBJECT (dbin, "Exposed everything");
3671 /* gst_decode_chain_expose:
3673 * Check if the chain can be exposed and add all endpads
3674 * to the endpads list.
3676 * Also update the active group's multiqueue to the
3679 * Not MT-safe, call with decodebin expose lock! *
3682 gst_decode_chain_expose (GstDecodeChain * chain, GList ** endpads,
3683 gboolean * missing_plugin)
3685 GstDecodeGroup *group;
3689 if (chain->deadend) {
3691 *missing_plugin = TRUE;
3695 if (chain->endpad) {
3696 if (!chain->endpad->blocked && !chain->endpad->exposed)
3698 *endpads = g_list_prepend (*endpads, gst_object_ref (chain->endpad));
3702 group = chain->active_group;
3705 if (!group->no_more_pads && !group->overrun)
3710 /* configure queues for playback */
3711 decodebin_set_queue_size (dbin, group->multiqueue, FALSE, TRUE);
3713 /* we can now disconnect any overrun signal, which is used to expose the
3715 if (group->overrunsig) {
3716 GST_LOG_OBJECT (dbin, "Disconnecting overrun");
3717 g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
3718 group->overrunsig = 0;
3721 for (l = group->children; l; l = l->next) {
3722 GstDecodeChain *childchain = l->data;
3724 if (!gst_decode_chain_expose (childchain, endpads, missing_plugin))
3731 /*************************
3732 * GstDecodePad functions
3733 *************************/
3736 gst_decode_pad_class_init (GstDecodePadClass * klass)
3741 gst_decode_pad_init (GstDecodePad * pad)
3744 pad->blocked = FALSE;
3745 pad->exposed = FALSE;
3746 pad->drained = FALSE;
3747 gst_object_ref (pad);
3748 gst_object_sink (pad);
3752 source_pad_blocked_cb (GstPad * pad, gboolean blocked, GstDecodePad * dpad)
3754 GstDecodeChain *chain;
3757 chain = dpad->chain;
3760 GST_LOG_OBJECT (dpad, "blocked:%d, dpad->chain:%p", blocked, chain);
3762 dpad->blocked = blocked;
3764 if (dpad->blocked) {
3766 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
3767 if (!gst_decode_bin_expose (dbin))
3768 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
3770 EXPOSE_UNLOCK (dbin);
3775 source_pad_event_probe (GstPad * pad, GstEvent * event, GstDecodePad * dpad)
3777 gboolean res = TRUE;
3779 GST_LOG_OBJECT (pad, "%s dpad:%p", GST_EVENT_TYPE_NAME (event), dpad);
3781 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
3782 GST_DEBUG_OBJECT (pad, "we received EOS");
3784 /* Check if all pads are drained.
3785 * * If there is no next group, we will let the EOS go through.
3786 * * If there is a next group but the current group isn't completely
3787 * drained, we will drop the EOS event.
3788 * * If there is a next group to expose and this was the last non-drained
3789 * pad for that group, we will remove the ghostpad of the current group
3790 * first, which unlinks the peer and so drops the EOS. */
3791 res = gst_decode_pad_handle_eos (dpad);
3798 gst_decode_pad_set_blocked (GstDecodePad * dpad, gboolean blocked)
3800 GstDecodeBin *dbin = dpad->dbin;
3805 GST_DEBUG_OBJECT (dpad, "blocking pad: %d", blocked);
3807 opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad));
3811 /* do not block if shutting down.
3812 * we do not consider/expect it blocked further below, but use other trick */
3813 if (!blocked || !dbin->shutdown)
3814 gst_pad_set_blocked_async_full (opad, blocked,
3815 (GstPadBlockCallback) source_pad_blocked_cb, gst_object_ref (dpad),
3816 (GDestroyNotify) gst_object_unref);
3819 if (dbin->shutdown) {
3820 /* deactivate to force flushing state to prevent NOT_LINKED errors */
3821 gst_pad_set_active (GST_PAD_CAST (dpad), FALSE);
3822 /* note that deactivating the target pad would have no effect here,
3823 * since elements are typically connected first (and pads exposed),
3824 * and only then brought to PAUSED state (so pads activated) */
3826 gst_object_ref (dpad);
3827 dbin->blocked_pads = g_list_prepend (dbin->blocked_pads, dpad);
3832 if ((l = g_list_find (dbin->blocked_pads, dpad))) {
3833 gst_object_unref (dpad);
3834 dbin->blocked_pads = g_list_delete_link (dbin->blocked_pads, l);
3837 gst_object_unref (opad);
3843 gst_decode_pad_add_drained_check (GstDecodePad * dpad)
3845 gst_pad_add_event_probe (GST_PAD_CAST (dpad),
3846 G_CALLBACK (source_pad_event_probe), dpad);
3850 gst_decode_pad_activate (GstDecodePad * dpad, GstDecodeChain * chain)
3852 g_return_if_fail (chain != NULL);
3854 dpad->chain = chain;
3855 gst_pad_set_active (GST_PAD_CAST (dpad), TRUE);
3856 gst_decode_pad_set_blocked (dpad, TRUE);
3857 gst_decode_pad_add_drained_check (dpad);
3861 gst_decode_pad_unblock (GstDecodePad * dpad)
3863 gst_decode_pad_set_blocked (dpad, FALSE);
3866 /*gst_decode_pad_new:
3868 * Creates a new GstDecodePad for the given pad.
3870 static GstDecodePad *
3871 gst_decode_pad_new (GstDecodeBin * dbin, GstPad * pad, GstDecodeChain * chain)
3874 GstPadTemplate *pad_tmpl;
3876 GST_DEBUG_OBJECT (dbin, "making new decodepad");
3877 pad_tmpl = gst_static_pad_template_get (&decoder_bin_src_template);
3879 g_object_new (GST_TYPE_DECODE_PAD, "direction", GST_PAD_DIRECTION (pad),
3880 "template", pad_tmpl, NULL);
3881 gst_ghost_pad_construct (GST_GHOST_PAD_CAST (dpad));
3882 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
3883 dpad->chain = chain;
3885 gst_object_unref (pad_tmpl);
3891 gst_pending_pad_free (GstPendingPad * ppad)
3894 g_assert (ppad->pad);
3896 if (ppad->event_probe_id != 0)
3897 gst_pad_remove_event_probe (ppad->pad, ppad->event_probe_id);
3898 gst_object_unref (ppad->pad);
3899 g_slice_free (GstPendingPad, ppad);
3903 * Element add/remove
3907 do_async_start (GstDecodeBin * dbin)
3909 GstMessage *message;
3911 dbin->async_pending = TRUE;
3913 message = gst_message_new_async_start (GST_OBJECT_CAST (dbin), FALSE);
3914 parent_class->handle_message (GST_BIN_CAST (dbin), message);
3918 do_async_done (GstDecodeBin * dbin)
3920 GstMessage *message;
3922 if (dbin->async_pending) {
3923 message = gst_message_new_async_done (GST_OBJECT_CAST (dbin));
3924 parent_class->handle_message (GST_BIN_CAST (dbin), message);
3926 dbin->async_pending = FALSE;
3931 * convenience functions
3936 * Returns the first sink pad of the given element, or NULL if it doesn't have
3941 find_sink_pad (GstElement * element)
3947 it = gst_element_iterate_sink_pads (element);
3949 if ((gst_iterator_next (it, &point)) == GST_ITERATOR_OK)
3950 pad = (GstPad *) point;
3952 gst_iterator_free (it);
3957 /* call with dyn_lock held */
3959 unblock_pads (GstDecodeBin * dbin)
3963 GST_LOG_OBJECT (dbin, "unblocking pads");
3965 for (tmp = dbin->blocked_pads; tmp; tmp = tmp->next) {
3966 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
3969 opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad));
3973 GST_DEBUG_OBJECT (dpad, "unblocking");
3974 gst_pad_set_blocked_async_full (opad, FALSE,
3975 (GstPadBlockCallback) source_pad_blocked_cb, gst_object_ref (dpad),
3976 (GDestroyNotify) gst_object_unref);
3977 /* make flushing, prevent NOT_LINKED */
3978 GST_PAD_SET_FLUSHING (GST_PAD_CAST (dpad));
3979 gst_object_unref (dpad);
3980 gst_object_unref (opad);
3981 GST_DEBUG_OBJECT (dpad, "unblocked");
3984 /* clear, no more blocked pads */
3985 g_list_free (dbin->blocked_pads);
3986 dbin->blocked_pads = NULL;
3989 static GstStateChangeReturn
3990 gst_decode_bin_change_state (GstElement * element, GstStateChange transition)
3992 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
3993 GstDecodeBin *dbin = GST_DECODE_BIN (element);
3995 switch (transition) {
3996 case GST_STATE_CHANGE_NULL_TO_READY:
3997 if (dbin->typefind == NULL)
3998 goto missing_typefind;
4000 case GST_STATE_CHANGE_READY_TO_PAUSED:
4001 /* Make sure we've cleared all existing chains */
4002 if (dbin->decode_chain) {
4003 gst_decode_chain_free (dbin->decode_chain);
4004 dbin->decode_chain = NULL;
4007 GST_LOG_OBJECT (dbin, "clearing shutdown flag");
4008 dbin->shutdown = FALSE;
4010 dbin->have_type = FALSE;
4011 ret = GST_STATE_CHANGE_ASYNC;
4012 do_async_start (dbin);
4014 case GST_STATE_CHANGE_PAUSED_TO_READY:
4016 GST_LOG_OBJECT (dbin, "setting shutdown flag");
4017 dbin->shutdown = TRUE;
4018 unblock_pads (dbin);
4025 GstStateChangeReturn bret;
4027 bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4028 if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
4029 goto activate_failed;
4030 else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
4031 do_async_done (dbin);
4035 switch (transition) {
4036 case GST_STATE_CHANGE_PAUSED_TO_READY:
4037 do_async_done (dbin);
4038 if (dbin->decode_chain) {
4039 gst_decode_chain_free (dbin->decode_chain);
4040 dbin->decode_chain = NULL;
4043 case GST_STATE_CHANGE_READY_TO_NULL:
4053 gst_element_post_message (element,
4054 gst_missing_element_message_new (element, "typefind"));
4055 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no typefind!"));
4056 return GST_STATE_CHANGE_FAILURE;
4060 GST_DEBUG_OBJECT (element,
4061 "element failed to change states -- activation problem?");
4062 return GST_STATE_CHANGE_FAILURE;
4067 gst_decode_bin_handle_message (GstBin * bin, GstMessage * msg)
4069 GstDecodeBin *dbin = GST_DECODE_BIN (bin);
4070 gboolean drop = FALSE;
4072 if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR) {
4073 GST_OBJECT_LOCK (dbin);
4074 drop = (g_list_find (dbin->filtered, GST_MESSAGE_SRC (msg)) != NULL);
4075 GST_OBJECT_UNLOCK (dbin);
4079 gst_message_unref (msg);
4081 GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
4085 gst_decode_bin_plugin_init (GstPlugin * plugin)
4087 GST_DEBUG_CATEGORY_INIT (gst_decode_bin_debug, "decodebin2", 0,
4091 GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
4093 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
4094 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
4095 #endif /* ENABLE_NLS */
4097 /* Register some quarks here for the stream topology message */
4098 topology_structure_name = g_quark_from_static_string ("stream-topology");
4099 topology_caps = g_quark_from_static_string ("caps");
4100 topology_next = g_quark_from_static_string ("next");
4101 topology_pad = g_quark_from_static_string ("pad");
4102 topology_element_srcpad = g_quark_from_static_string ("element-srcpad");
4104 return gst_element_register (plugin, "decodebin2", GST_RANK_NONE,
4105 GST_TYPE_DECODE_BIN);