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-decodebin
26 * #GstBin that auto-magically constructs a decoding pipeline using available
27 * decoders and demuxers via auto-plugging.
29 * decodebin is considered stable now and replaces the old #decodebin element.
30 * #uridecodebin uses decodebin 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 decodebin works internally.
38 * The first part of decodebin 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 * decodebin 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 decodebin 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 decodebin 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 decodebin 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!
84 /* FIXME 0.11: suppress warnings for deprecated API such as GValueArray
85 * with newer GLib versions (>= 2.31.0) */
86 #define GLIB_DISABLE_DEPRECATION_WARNINGS
92 #include <gst/gst-i18n-plugin.h>
96 #include <gst/pbutils/pbutils.h>
98 #include "gstplay-enum.h"
99 #include "gstplayback.h"
100 #include "gstrawcaps.h"
102 #include "gst/glib-compat-private.h"
104 /* Also used by gsturidecodebin.c */
105 gint _decode_bin_compare_factories_func (gconstpointer p1, gconstpointer p2);
107 /* generic templates */
108 static GstStaticPadTemplate decoder_bin_sink_template =
109 GST_STATIC_PAD_TEMPLATE ("sink",
112 GST_STATIC_CAPS_ANY);
114 static GstStaticPadTemplate decoder_bin_src_template =
115 GST_STATIC_PAD_TEMPLATE ("src_%u",
118 GST_STATIC_CAPS_ANY);
120 GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug);
121 #define GST_CAT_DEFAULT gst_decode_bin_debug
123 typedef struct _GstPendingPad GstPendingPad;
124 typedef struct _GstDecodeElement GstDecodeElement;
125 typedef struct _GstDecodeChain GstDecodeChain;
126 typedef struct _GstDecodeGroup GstDecodeGroup;
127 typedef struct _GstDecodePad GstDecodePad;
128 typedef GstGhostPadClass GstDecodePadClass;
129 typedef struct _GstDecodeBin GstDecodeBin;
130 typedef struct _GstDecodeBinClass GstDecodeBinClass;
132 #define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type())
133 #define GST_DECODE_BIN_CAST(obj) ((GstDecodeBin*)(obj))
134 #define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin))
135 #define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass))
136 #define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN))
137 #define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN))
142 * The opaque #GstDecodeBin data structure
146 GstBin bin; /* we extend GstBin */
149 GstCaps *caps; /* caps on which to stop decoding */
150 gchar *encoding; /* encoding of subtitles */
151 gboolean use_buffering; /* configure buffering on multiqueues */
154 guint max_size_bytes;
155 guint max_size_buffers;
156 guint64 max_size_time;
157 gboolean post_stream_topology;
158 guint64 connection_speed;
160 GstElement *typefind; /* this holds the typefind object */
162 GMutex *expose_lock; /* Protects exposal and removal of groups */
163 GstDecodeChain *decode_chain; /* Top level decode chain */
164 guint nbpads; /* unique identifier for source pads */
166 GMutex *factories_lock;
167 guint32 factories_cookie; /* Cookie from last time when factories was updated */
168 GList *factories; /* factories we can use for selecting elements */
170 GMutex *subtitle_lock; /* Protects changes to subtitles and encoding */
171 GList *subtitles; /* List of elements with subtitle-encoding,
172 * protected by above mutex! */
174 gboolean have_type; /* if we received the have_type signal */
175 guint have_type_id; /* signal id for have-type from typefind */
177 gboolean async_pending; /* async-start has been emitted */
179 GMutex *dyn_lock; /* lock protecting pad blocking */
180 gboolean shutdown; /* if we are shutting down */
181 GList *blocked_pads; /* pads that have set to block */
183 gboolean expose_allstreams; /* Whether to expose unknow type streams or not */
185 GList *filtered; /* elements for which error messages are filtered */
188 struct _GstDecodeBinClass
190 GstBinClass parent_class;
192 /* signal fired when we found a pad that we cannot decode */
193 void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
195 /* signal fired to know if we continue trying to decode the given caps */
196 gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
198 /* signal fired to get a list of factories to try to autoplug */
199 GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
201 /* signal fired to sort the factories */
202 GValueArray *(*autoplug_sort) (GstElement * element, GstPad * pad,
203 GstCaps * caps, GValueArray * factories);
204 /* signal fired to select from the proposed list of factories */
205 GstAutoplugSelectResult (*autoplug_select) (GstElement * element,
206 GstPad * pad, GstCaps * caps, GstElementFactory * factory);
208 /* fired when the last group is drained */
209 void (*drained) (GstElement * element);
216 SIGNAL_AUTOPLUG_CONTINUE,
217 SIGNAL_AUTOPLUG_FACTORIES,
218 SIGNAL_AUTOPLUG_SELECT,
219 SIGNAL_AUTOPLUG_SORT,
224 /* automatic sizes, while prerolling we buffer up to 2MB, we ignore time
225 * and buffers in this case. */
226 #define AUTO_PREROLL_SIZE_BYTES 2 * 1024 * 1024
227 #define AUTO_PREROLL_SIZE_BUFFERS 0
228 #define AUTO_PREROLL_NOT_SEEKABLE_SIZE_TIME 10 * GST_SECOND
229 #define AUTO_PREROLL_SEEKABLE_SIZE_TIME 0
231 /* whan playing, keep a max of 2MB of data but try to keep the number of buffers
232 * as low as possible (try to aim for 5 buffers) */
233 #define AUTO_PLAY_SIZE_BYTES 2 * 1024 * 1024
234 #define AUTO_PLAY_SIZE_BUFFERS 5
235 #define AUTO_PLAY_SIZE_TIME 0
237 #define DEFAULT_SUBTITLE_ENCODING NULL
238 #define DEFAULT_USE_BUFFERING FALSE
239 #define DEFAULT_LOW_PERCENT 10
240 #define DEFAULT_HIGH_PERCENT 99
241 /* by default we use the automatic values above */
242 #define DEFAULT_MAX_SIZE_BYTES 0
243 #define DEFAULT_MAX_SIZE_BUFFERS 0
244 #define DEFAULT_MAX_SIZE_TIME 0
245 #define DEFAULT_POST_STREAM_TOPOLOGY FALSE
246 #define DEFAULT_EXPOSE_ALL_STREAMS TRUE
247 #define DEFAULT_CONNECTION_SPEED 0
254 PROP_SUBTITLE_ENCODING,
260 PROP_MAX_SIZE_BUFFERS,
262 PROP_POST_STREAM_TOPOLOGY,
263 PROP_EXPOSE_ALL_STREAMS,
264 PROP_CONNECTION_SPEED,
268 static GstBinClass *parent_class;
269 static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
271 static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS);
273 static void do_async_start (GstDecodeBin * dbin);
274 static void do_async_done (GstDecodeBin * dbin);
276 static void type_found (GstElement * typefind, guint probability,
277 GstCaps * caps, GstDecodeBin * decode_bin);
279 static void decodebin_set_queue_size (GstDecodeBin * dbin,
280 GstElement * multiqueue, gboolean preroll, gboolean seekable);
282 static gboolean gst_decode_bin_autoplug_continue (GstElement * element,
283 GstPad * pad, GstCaps * caps);
284 static GValueArray *gst_decode_bin_autoplug_factories (GstElement *
285 element, GstPad * pad, GstCaps * caps);
286 static GValueArray *gst_decode_bin_autoplug_sort (GstElement * element,
287 GstPad * pad, GstCaps * caps, GValueArray * factories);
288 static GstAutoplugSelectResult gst_decode_bin_autoplug_select (GstElement *
289 element, GstPad * pad, GstCaps * caps, GstElementFactory * factory);
291 static void gst_decode_bin_set_property (GObject * object, guint prop_id,
292 const GValue * value, GParamSpec * pspec);
293 static void gst_decode_bin_get_property (GObject * object, guint prop_id,
294 GValue * value, GParamSpec * pspec);
295 static void gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps);
296 static GstCaps *gst_decode_bin_get_caps (GstDecodeBin * dbin);
297 static void caps_notify_cb (GstPad * pad, GParamSpec * unused,
298 GstDecodeChain * chain);
300 static GstPad *find_sink_pad (GstElement * element);
301 static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element,
302 GstStateChange transition);
303 static void gst_decode_bin_handle_message (GstBin * bin, GstMessage * message);
305 static gboolean check_upstream_seekable (GstDecodeBin * dbin, GstPad * pad);
307 #define EXPOSE_LOCK(dbin) G_STMT_START { \
308 GST_LOG_OBJECT (dbin, \
309 "expose locking from thread %p", \
311 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \
312 GST_LOG_OBJECT (dbin, \
313 "expose locked from thread %p", \
317 #define EXPOSE_UNLOCK(dbin) G_STMT_START { \
318 GST_LOG_OBJECT (dbin, \
319 "expose unlocking from thread %p", \
321 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \
324 #define DYN_LOCK(dbin) G_STMT_START { \
325 GST_LOG_OBJECT (dbin, \
326 "dynlocking from thread %p", \
328 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \
329 GST_LOG_OBJECT (dbin, \
330 "dynlocked from thread %p", \
334 #define DYN_UNLOCK(dbin) G_STMT_START { \
335 GST_LOG_OBJECT (dbin, \
336 "dynunlocking from thread %p", \
338 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \
341 #define SUBTITLE_LOCK(dbin) G_STMT_START { \
342 GST_LOG_OBJECT (dbin, \
343 "subtitle locking from thread %p", \
345 g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \
346 GST_LOG_OBJECT (dbin, \
347 "subtitle lock from thread %p", \
351 #define SUBTITLE_UNLOCK(dbin) G_STMT_START { \
352 GST_LOG_OBJECT (dbin, \
353 "subtitle unlocking from thread %p", \
355 g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \
358 struct _GstPendingPad
361 GstDecodeChain *chain;
362 gulong event_probe_id;
365 struct _GstDecodeElement
368 GstElement *capsfilter; /* Optional capsfilter for Parser/Convert */
373 * Streams belonging to the same group/chain of a media file
375 * When changing something here lock the parent chain!
377 struct _GstDecodeGroup
380 GstDecodeChain *parent;
382 GstElement *multiqueue; /* Used for linking all child chains */
383 gulong overrunsig; /* the overrun signal for multiqueue */
385 gboolean overrun; /* TRUE if the multiqueue signaled overrun. This
386 * means that we should really expose the group */
388 gboolean no_more_pads; /* TRUE if the demuxer signaled no-more-pads */
389 gboolean drained; /* TRUE if the all children are drained */
391 GList *children; /* List of GstDecodeChains in this group */
393 GList *reqpads; /* List of RequestPads for multiqueue, there is
394 * exactly one RequestPad per child chain */
397 struct _GstDecodeChain
399 GstDecodeGroup *parent;
402 GMutex *lock; /* Protects this chain and its groups */
404 GstPad *pad; /* srcpad that caused creation of this chain */
406 gboolean demuxer; /* TRUE if elements->data is a demuxer */
407 gboolean seekable; /* TRUE if this chain ends on a demuxer and is seekable */
408 GList *elements; /* All elements in this group, first
409 is the latest and most downstream element */
411 /* Note: there are only groups if the last element of this chain
412 * is a demuxer, otherwise the chain will end with an endpad.
413 * The other way around this means, that endpad only exists if this
414 * chain doesn't end with a demuxer! */
416 GstDecodeGroup *active_group; /* Currently active group */
417 GList *next_groups; /* head is newest group, tail is next group.
418 a new group will be created only if the head
419 group had no-more-pads. If it's only exposed
420 all new pads will be ignored! */
421 GList *pending_pads; /* Pads that have no fixed caps yet */
423 GstDecodePad *endpad; /* Pad of this chain that could be exposed */
424 gboolean deadend; /* This chain is incomplete and can't be completed,
425 e.g. no suitable decoder could be found
426 e.g. stream got EOS without buffers
428 GstCaps *endcaps; /* Caps that were used when linking to the endpad
429 or that resulted in the deadend
432 /* FIXME: This should be done directly via a thread! */
433 GList *old_groups; /* Groups that should be freed later */
436 static void gst_decode_chain_free (GstDecodeChain * chain);
437 static GstDecodeChain *gst_decode_chain_new (GstDecodeBin * dbin,
438 GstDecodeGroup * group, GstPad * pad);
439 static void gst_decode_group_hide (GstDecodeGroup * group);
440 static void gst_decode_group_free (GstDecodeGroup * group);
441 static GstDecodeGroup *gst_decode_group_new (GstDecodeBin * dbin,
442 GstDecodeChain * chain);
443 static gboolean gst_decode_chain_is_complete (GstDecodeChain * chain);
444 static gboolean gst_decode_chain_expose (GstDecodeChain * chain,
445 GList ** endpads, gboolean * missing_plugin);
446 static gboolean gst_decode_chain_is_drained (GstDecodeChain * chain);
447 static gboolean gst_decode_group_is_complete (GstDecodeGroup * group);
448 static GstPad *gst_decode_group_control_demuxer_pad (GstDecodeGroup * group,
450 static gboolean gst_decode_group_is_drained (GstDecodeGroup * group);
452 static gboolean gst_decode_bin_expose (GstDecodeBin * dbin);
454 #define CHAIN_MUTEX_LOCK(chain) G_STMT_START { \
455 GST_LOG_OBJECT (chain->dbin, \
456 "locking chain %p from thread %p", \
457 chain, g_thread_self ()); \
458 g_mutex_lock (chain->lock); \
459 GST_LOG_OBJECT (chain->dbin, \
460 "locked chain %p from thread %p", \
461 chain, g_thread_self ()); \
464 #define CHAIN_MUTEX_UNLOCK(chain) G_STMT_START { \
465 GST_LOG_OBJECT (chain->dbin, \
466 "unlocking chain %p from thread %p", \
467 chain, g_thread_self ()); \
468 g_mutex_unlock (chain->lock); \
473 * GstPad private used for source pads of chains
479 GstDecodeChain *chain;
481 gboolean blocked; /* the *target* pad is blocked */
482 gboolean exposed; /* the pad is exposed */
483 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 GstPadProbeReturn pad_event_cb (GstPad * pad, GstPadProbeInfo * info,
504 /********************************
505 * Standard GObject boilerplate *
506 ********************************/
508 static void gst_decode_bin_class_init (GstDecodeBinClass * klass);
509 static void gst_decode_bin_init (GstDecodeBin * decode_bin);
510 static void gst_decode_bin_dispose (GObject * object);
511 static void gst_decode_bin_finalize (GObject * object);
514 gst_decode_bin_get_type (void)
516 static GType gst_decode_bin_type = 0;
518 if (!gst_decode_bin_type) {
519 static const GTypeInfo gst_decode_bin_info = {
520 sizeof (GstDecodeBinClass),
523 (GClassInitFunc) gst_decode_bin_class_init,
526 sizeof (GstDecodeBin),
528 (GInstanceInitFunc) gst_decode_bin_init,
532 gst_decode_bin_type =
533 g_type_register_static (GST_TYPE_BIN, "GstDecodeBin",
534 &gst_decode_bin_info, 0);
537 return gst_decode_bin_type;
541 _gst_boolean_accumulator (GSignalInvocationHint * ihint,
542 GValue * return_accu, const GValue * handler_return, gpointer dummy)
546 myboolean = g_value_get_boolean (handler_return);
547 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
548 g_value_set_boolean (return_accu, myboolean);
550 /* stop emission if FALSE */
554 /* we collect the first result */
556 _gst_array_accumulator (GSignalInvocationHint * ihint,
557 GValue * return_accu, const GValue * handler_return, gpointer dummy)
561 array = g_value_get_boxed (handler_return);
562 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
563 g_value_set_boxed (return_accu, array);
569 _gst_select_accumulator (GSignalInvocationHint * ihint,
570 GValue * return_accu, const GValue * handler_return, gpointer dummy)
572 GstAutoplugSelectResult res;
574 res = g_value_get_enum (handler_return);
575 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
576 g_value_set_enum (return_accu, res);
582 _gst_array_hasvalue_accumulator (GSignalInvocationHint * ihint,
583 GValue * return_accu, const GValue * handler_return, gpointer dummy)
587 array = g_value_get_boxed (handler_return);
588 if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
589 g_value_set_boxed (return_accu, array);
598 gst_decode_bin_class_init (GstDecodeBinClass * klass)
600 GObjectClass *gobject_klass;
601 GstElementClass *gstelement_klass;
602 GstBinClass *gstbin_klass;
604 gobject_klass = (GObjectClass *) klass;
605 gstelement_klass = (GstElementClass *) klass;
606 gstbin_klass = (GstBinClass *) klass;
608 parent_class = g_type_class_peek_parent (klass);
610 gobject_klass->dispose = gst_decode_bin_dispose;
611 gobject_klass->finalize = gst_decode_bin_finalize;
612 gobject_klass->set_property = gst_decode_bin_set_property;
613 gobject_klass->get_property = gst_decode_bin_get_property;
616 * GstDecodeBin::unknown-type:
617 * @bin: The decodebin.
618 * @pad: The new pad containing caps that cannot be resolved to a 'final'
620 * @caps: The #GstCaps of the pad that cannot be resolved.
622 * This signal is emitted when a pad for which there is no further possible
623 * decoding is added to the decodebin.
625 gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
626 g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
627 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type),
628 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2,
629 GST_TYPE_PAD, GST_TYPE_CAPS);
632 * GstDecodeBin::autoplug-continue:
633 * @bin: The decodebin.
635 * @caps: The #GstCaps found.
637 * This signal is emitted whenever decodebin finds a new stream. It is
638 * emitted before looking for any elements that can handle that stream.
641 * Invocation of signal handlers stops after the first signal handler
642 * returns #FALSE. Signal handlers are invoked in the order they were
646 * Returns: #TRUE if you wish decodebin to look for elements that can
647 * handle the given @caps. If #FALSE, those caps will be considered as
648 * final and the pad will be exposed as such (see 'pad-added' signal of
651 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
652 g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
653 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_continue),
654 _gst_boolean_accumulator, NULL, g_cclosure_marshal_generic,
655 G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
658 * GstDecodeBin::autoplug-factories:
659 * @bin: The decodebin.
661 * @caps: The #GstCaps found.
663 * This function is emited when an array of possible factories for @caps on
664 * @pad is needed. Decodebin will by default return an array with all
665 * compatible factories, sorted by rank.
667 * If this function returns NULL, @pad will be exposed as a final caps.
669 * If this function returns an empty array, the pad will be considered as
670 * having an unhandled type media type.
673 * Only the signal handler that is connected first will ever by invoked.
674 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
675 * signal, they will never be invoked!
678 * Returns: a #GValueArray* with a list of factories to try. The factories are
679 * by default tried in the returned order or based on the index returned by
682 gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
683 g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
684 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass,
685 autoplug_factories), _gst_array_accumulator, NULL,
686 g_cclosure_marshal_generic, G_TYPE_VALUE_ARRAY, 2,
687 GST_TYPE_PAD, GST_TYPE_CAPS);
690 * GstDecodeBin::autoplug-sort:
691 * @bin: The decodebin.
693 * @caps: The #GstCaps.
694 * @factories: A #GValueArray of possible #GstElementFactory to use.
696 * Once decodebin has found the possible #GstElementFactory objects to try
697 * for @caps on @pad, this signal is emited. The purpose of the signal is for
698 * the application to perform additional sorting or filtering on the element
701 * The callee should copy and modify @factories or return #NULL if the
702 * order should not change.
705 * Invocation of signal handlers stops after one signal handler has
706 * returned something else than #NULL. Signal handlers are invoked in
707 * the order they were connected in.
708 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
709 * signal, they will never be invoked!
712 * Returns: A new sorted array of #GstElementFactory objects.
714 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] =
715 g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass),
716 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_sort),
717 _gst_array_hasvalue_accumulator, NULL,
718 g_cclosure_marshal_generic, G_TYPE_VALUE_ARRAY, 3, GST_TYPE_PAD,
719 GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY | G_SIGNAL_TYPE_STATIC_SCOPE);
722 * GstDecodeBin::autoplug-select:
723 * @bin: The decodebin.
725 * @caps: The #GstCaps.
726 * @factory: A #GstElementFactory to use.
728 * This signal is emitted once decodebin has found all the possible
729 * #GstElementFactory that can be used to handle the given @caps. For each of
730 * those factories, this signal is emitted.
732 * The signal handler should return a #GST_TYPE_AUTOPLUG_SELECT_RESULT enum
733 * value indicating what decodebin should do next.
735 * A value of #GST_AUTOPLUG_SELECT_TRY will try to autoplug an element from
738 * A value of #GST_AUTOPLUG_SELECT_EXPOSE will expose @pad without plugging
741 * A value of #GST_AUTOPLUG_SELECT_SKIP will skip @factory and move to the
745 * Only the signal handler that is connected first will ever by invoked.
746 * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
747 * signal, they will never be invoked!
750 * Returns: a #GST_TYPE_AUTOPLUG_SELECT_RESULT that indicates the required
751 * operation. the default handler will always return
752 * #GST_AUTOPLUG_SELECT_TRY.
754 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] =
755 g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass),
756 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_select),
757 _gst_select_accumulator, NULL,
758 g_cclosure_marshal_generic,
759 GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
760 GST_TYPE_ELEMENT_FACTORY);
763 * GstDecodeBin::drained
764 * @bin: The decodebin
766 * This signal is emitted once decodebin has finished decoding all the data.
770 gst_decode_bin_signals[SIGNAL_DRAINED] =
771 g_signal_new ("drained", G_TYPE_FROM_CLASS (klass),
772 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, drained),
773 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 0, G_TYPE_NONE);
775 g_object_class_install_property (gobject_klass, PROP_CAPS,
776 g_param_spec_boxed ("caps", "Caps", "The caps on which to stop decoding.",
777 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
779 g_object_class_install_property (gobject_klass, PROP_SUBTITLE_ENCODING,
780 g_param_spec_string ("subtitle-encoding", "subtitle encoding",
781 "Encoding to assume if input subtitles are not in UTF-8 encoding. "
782 "If not set, the GST_SUBTITLE_ENCODING environment variable will "
783 "be checked for an encoding to use. If that is not set either, "
784 "ISO-8859-15 will be assumed.", NULL,
785 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
787 g_object_class_install_property (gobject_klass, PROP_SINK_CAPS,
788 g_param_spec_boxed ("sink-caps", "Sink Caps",
789 "The caps of the input data. (NULL = use typefind element)",
790 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
793 * GstDecodeBin::use-buffering
795 * Activate buffering in decodebin. This will instruct the multiqueues behind
796 * decoders to emit BUFFERING messages.
800 g_object_class_install_property (gobject_klass, PROP_USE_BUFFERING,
801 g_param_spec_boolean ("use-buffering", "Use Buffering",
802 "Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds",
803 DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
806 * GstDecodeBin:low-percent
808 * Low threshold percent for buffering to start.
812 g_object_class_install_property (gobject_klass, PROP_LOW_PERCENT,
813 g_param_spec_int ("low-percent", "Low percent",
814 "Low threshold for buffering to start", 0, 100,
815 DEFAULT_LOW_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
817 * GstDecodeBin:high-percent
819 * High threshold percent for buffering to finish.
823 g_object_class_install_property (gobject_klass, PROP_HIGH_PERCENT,
824 g_param_spec_int ("high-percent", "High percent",
825 "High threshold for buffering to finish", 0, 100,
826 DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
829 * GstDecodeBin:max-size-bytes
831 * Max amount of bytes in the queue (0=automatic).
835 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BYTES,
836 g_param_spec_uint ("max-size-bytes", "Max. size (bytes)",
837 "Max. amount of bytes in the queue (0=automatic)",
838 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
839 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
841 * GstDecodeBin:max-size-buffers
843 * Max amount of buffers in the queue (0=automatic).
847 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BUFFERS,
848 g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
849 "Max. number of buffers in the queue (0=automatic)",
850 0, G_MAXUINT, DEFAULT_MAX_SIZE_BUFFERS,
851 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
853 * GstDecodeBin:max-size-time
855 * Max amount of time in the queue (in ns, 0=automatic).
859 g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_TIME,
860 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
861 "Max. amount of data in the queue (in ns, 0=automatic)",
863 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
866 * GstDecodeBin::post-stream-topology
868 * Post stream-topology messages on the bus every time the topology changes.
872 g_object_class_install_property (gobject_klass, PROP_POST_STREAM_TOPOLOGY,
873 g_param_spec_boolean ("post-stream-topology", "Post Stream Topology",
874 "Post stream-topology messages",
875 DEFAULT_POST_STREAM_TOPOLOGY,
876 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
879 * GstDecodeBin::expose-all-streams
881 * Expose streams of unknown type.
883 * If set to %FALSE, then only the streams that can be decoded to the final
884 * caps (see 'caps' property) will have a pad exposed. Streams that do not
885 * match those caps but could have been decoded will not have decoder plugged
886 * in internally and will not have a pad exposed.
890 g_object_class_install_property (gobject_klass, PROP_EXPOSE_ALL_STREAMS,
891 g_param_spec_boolean ("expose-all-streams", "Expose All Streams",
892 "Expose all streams, including those of unknown type or that don't match the 'caps' property",
893 DEFAULT_EXPOSE_ALL_STREAMS,
894 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
897 * GstDecodeBin2::connection-speed
899 * Network connection speed in kbps (0 = unknownw)
903 g_object_class_install_property (gobject_klass, PROP_CONNECTION_SPEED,
904 g_param_spec_uint64 ("connection-speed", "Connection Speed",
905 "Network connection speed in kbps (0 = unknown)",
906 0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED,
907 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
911 klass->autoplug_continue =
912 GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_continue);
913 klass->autoplug_factories =
914 GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_factories);
915 klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_sort);
916 klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_select);
918 gst_element_class_add_pad_template (gstelement_klass,
919 gst_static_pad_template_get (&decoder_bin_sink_template));
920 gst_element_class_add_pad_template (gstelement_klass,
921 gst_static_pad_template_get (&decoder_bin_src_template));
923 gst_element_class_set_static_metadata (gstelement_klass,
924 "Decoder Bin", "Generic/Bin/Decoder",
925 "Autoplug and decode to raw media",
926 "Edward Hervey <edward.hervey@collabora.co.uk>, "
927 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
929 gstelement_klass->change_state =
930 GST_DEBUG_FUNCPTR (gst_decode_bin_change_state);
932 gstbin_klass->handle_message =
933 GST_DEBUG_FUNCPTR (gst_decode_bin_handle_message);
937 _decode_bin_compare_factories_func (gconstpointer p1, gconstpointer p2)
939 GstPluginFeature *f1, *f2;
941 gboolean is_parser1, is_parser2;
943 f1 = (GstPluginFeature *) p1;
944 f2 = (GstPluginFeature *) p2;
946 is_parser1 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f1),
947 GST_ELEMENT_FACTORY_TYPE_PARSER);
948 is_parser2 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f2),
949 GST_ELEMENT_FACTORY_TYPE_PARSER);
952 /* We want all parsers first as we always want to plug parsers
954 if (is_parser1 && !is_parser2)
956 else if (!is_parser1 && is_parser2)
959 /* And if it's a both a parser we first sort by rank
960 * and then by factory name */
961 diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
965 diff = strcmp (GST_OBJECT_NAME (f2), GST_OBJECT_NAME (f1));
970 /* Must be called with factories lock! */
972 gst_decode_bin_update_factories_list (GstDecodeBin * dbin)
976 cookie = gst_registry_get_feature_list_cookie (gst_registry_get ());
977 if (!dbin->factories || dbin->factories_cookie != cookie) {
979 gst_plugin_feature_list_free (dbin->factories);
981 gst_element_factory_list_get_elements
982 (GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
984 g_list_sort (dbin->factories, _decode_bin_compare_factories_func);
985 dbin->factories_cookie = cookie;
990 gst_decode_bin_init (GstDecodeBin * decode_bin)
992 /* first filter out the interesting element factories */
993 decode_bin->factories_lock = g_mutex_new ();
995 /* we create the typefind element only once */
996 decode_bin->typefind = gst_element_factory_make ("typefind", "typefind");
997 if (!decode_bin->typefind) {
998 g_warning ("can't find typefind element, decodebin will not work");
1002 GstPadTemplate *pad_tmpl;
1004 /* add the typefind element */
1005 if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind)) {
1006 g_warning ("Could not add typefind element, decodebin will not work");
1007 gst_object_unref (decode_bin->typefind);
1008 decode_bin->typefind = NULL;
1011 /* get the sinkpad */
1012 pad = gst_element_get_static_pad (decode_bin->typefind, "sink");
1014 /* get the pad template */
1015 pad_tmpl = gst_static_pad_template_get (&decoder_bin_sink_template);
1017 /* ghost the sink pad to ourself */
1018 gpad = gst_ghost_pad_new_from_template ("sink", pad, pad_tmpl);
1019 gst_pad_set_active (gpad, TRUE);
1020 gst_element_add_pad (GST_ELEMENT (decode_bin), gpad);
1022 gst_object_unref (pad_tmpl);
1023 gst_object_unref (pad);
1025 /* connect a signal to find out when the typefind element found
1027 decode_bin->have_type_id =
1028 g_signal_connect (G_OBJECT (decode_bin->typefind), "have-type",
1029 G_CALLBACK (type_found), decode_bin);
1032 decode_bin->expose_lock = g_mutex_new ();
1033 decode_bin->decode_chain = NULL;
1035 decode_bin->dyn_lock = g_mutex_new ();
1036 decode_bin->shutdown = FALSE;
1037 decode_bin->blocked_pads = NULL;
1039 decode_bin->subtitle_lock = g_mutex_new ();
1041 decode_bin->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING);
1042 decode_bin->caps = gst_static_caps_get (&default_raw_caps);
1043 decode_bin->use_buffering = DEFAULT_USE_BUFFERING;
1044 decode_bin->low_percent = DEFAULT_LOW_PERCENT;
1045 decode_bin->high_percent = DEFAULT_HIGH_PERCENT;
1047 decode_bin->max_size_bytes = DEFAULT_MAX_SIZE_BYTES;
1048 decode_bin->max_size_buffers = DEFAULT_MAX_SIZE_BUFFERS;
1049 decode_bin->max_size_time = DEFAULT_MAX_SIZE_TIME;
1051 decode_bin->expose_allstreams = DEFAULT_EXPOSE_ALL_STREAMS;
1052 decode_bin->connection_speed = DEFAULT_CONNECTION_SPEED;
1056 gst_decode_bin_dispose (GObject * object)
1058 GstDecodeBin *decode_bin;
1060 decode_bin = GST_DECODE_BIN (object);
1062 if (decode_bin->factories)
1063 gst_plugin_feature_list_free (decode_bin->factories);
1064 decode_bin->factories = NULL;
1066 if (decode_bin->decode_chain)
1067 gst_decode_chain_free (decode_bin->decode_chain);
1068 decode_bin->decode_chain = NULL;
1070 if (decode_bin->caps)
1071 gst_caps_unref (decode_bin->caps);
1072 decode_bin->caps = NULL;
1074 g_free (decode_bin->encoding);
1075 decode_bin->encoding = NULL;
1077 g_list_free (decode_bin->subtitles);
1078 decode_bin->subtitles = NULL;
1080 G_OBJECT_CLASS (parent_class)->dispose (object);
1084 gst_decode_bin_finalize (GObject * object)
1086 GstDecodeBin *decode_bin;
1088 decode_bin = GST_DECODE_BIN (object);
1090 if (decode_bin->expose_lock) {
1091 g_mutex_free (decode_bin->expose_lock);
1092 decode_bin->expose_lock = NULL;
1095 if (decode_bin->dyn_lock) {
1096 g_mutex_free (decode_bin->dyn_lock);
1097 decode_bin->dyn_lock = NULL;
1100 if (decode_bin->subtitle_lock) {
1101 g_mutex_free (decode_bin->subtitle_lock);
1102 decode_bin->subtitle_lock = NULL;
1105 if (decode_bin->factories_lock) {
1106 g_mutex_free (decode_bin->factories_lock);
1107 decode_bin->factories_lock = NULL;
1110 G_OBJECT_CLASS (parent_class)->finalize (object);
1114 * Changes the caps on which decodebin will stop decoding.
1115 * Will unref the previously set one. The refcount of the given caps will be
1117 * @caps can be NULL.
1122 gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps)
1124 GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps);
1126 GST_OBJECT_LOCK (dbin);
1127 gst_caps_replace (&dbin->caps, caps);
1128 GST_OBJECT_UNLOCK (dbin);
1132 * Returns the currently configured caps on which decodebin will stop decoding.
1133 * The returned caps (if not NULL), will have its refcount incremented.
1138 gst_decode_bin_get_caps (GstDecodeBin * dbin)
1142 GST_DEBUG_OBJECT (dbin, "Getting currently set caps");
1144 GST_OBJECT_LOCK (dbin);
1147 gst_caps_ref (caps);
1148 GST_OBJECT_UNLOCK (dbin);
1154 gst_decode_bin_set_sink_caps (GstDecodeBin * dbin, GstCaps * caps)
1156 GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps);
1158 g_object_set (dbin->typefind, "force-caps", caps, NULL);
1162 gst_decode_bin_get_sink_caps (GstDecodeBin * dbin)
1166 GST_DEBUG_OBJECT (dbin, "Getting currently set caps");
1168 g_object_get (dbin->typefind, "force-caps", &caps, NULL);
1174 gst_decode_bin_set_subs_encoding (GstDecodeBin * dbin, const gchar * encoding)
1178 GST_DEBUG_OBJECT (dbin, "Setting new encoding: %s", GST_STR_NULL (encoding));
1180 SUBTITLE_LOCK (dbin);
1181 g_free (dbin->encoding);
1182 dbin->encoding = g_strdup (encoding);
1184 /* set the subtitle encoding on all added elements */
1185 for (walk = dbin->subtitles; walk; walk = g_list_next (walk)) {
1186 g_object_set (G_OBJECT (walk->data), "subtitle-encoding", dbin->encoding,
1189 SUBTITLE_UNLOCK (dbin);
1193 gst_decode_bin_get_subs_encoding (GstDecodeBin * dbin)
1197 GST_DEBUG_OBJECT (dbin, "Getting currently set encoding");
1199 SUBTITLE_LOCK (dbin);
1200 encoding = g_strdup (dbin->encoding);
1201 SUBTITLE_UNLOCK (dbin);
1207 gst_decode_bin_set_property (GObject * object, guint prop_id,
1208 const GValue * value, GParamSpec * pspec)
1212 dbin = GST_DECODE_BIN (object);
1216 gst_decode_bin_set_caps (dbin, g_value_get_boxed (value));
1218 case PROP_SUBTITLE_ENCODING:
1219 gst_decode_bin_set_subs_encoding (dbin, g_value_get_string (value));
1221 case PROP_SINK_CAPS:
1222 gst_decode_bin_set_sink_caps (dbin, g_value_get_boxed (value));
1224 case PROP_USE_BUFFERING:
1225 dbin->use_buffering = g_value_get_boolean (value);
1227 case PROP_LOW_PERCENT:
1228 dbin->low_percent = g_value_get_int (value);
1230 case PROP_HIGH_PERCENT:
1231 dbin->high_percent = g_value_get_int (value);
1233 case PROP_MAX_SIZE_BYTES:
1234 dbin->max_size_bytes = g_value_get_uint (value);
1236 case PROP_MAX_SIZE_BUFFERS:
1237 dbin->max_size_buffers = g_value_get_uint (value);
1239 case PROP_MAX_SIZE_TIME:
1240 dbin->max_size_time = g_value_get_uint64 (value);
1242 case PROP_POST_STREAM_TOPOLOGY:
1243 dbin->post_stream_topology = g_value_get_boolean (value);
1245 case PROP_EXPOSE_ALL_STREAMS:
1246 dbin->expose_allstreams = g_value_get_boolean (value);
1248 case PROP_CONNECTION_SPEED:
1249 GST_OBJECT_LOCK (dbin);
1250 dbin->connection_speed = g_value_get_uint64 (value) * 1000;
1251 GST_OBJECT_UNLOCK (dbin);
1254 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1260 gst_decode_bin_get_property (GObject * object, guint prop_id,
1261 GValue * value, GParamSpec * pspec)
1265 dbin = GST_DECODE_BIN (object);
1268 g_value_take_boxed (value, gst_decode_bin_get_caps (dbin));
1270 case PROP_SUBTITLE_ENCODING:
1271 g_value_take_string (value, gst_decode_bin_get_subs_encoding (dbin));
1273 case PROP_SINK_CAPS:
1274 g_value_take_boxed (value, gst_decode_bin_get_sink_caps (dbin));
1276 case PROP_USE_BUFFERING:
1277 g_value_set_boolean (value, dbin->use_buffering);
1279 case PROP_LOW_PERCENT:
1280 g_value_set_int (value, dbin->low_percent);
1282 case PROP_HIGH_PERCENT:
1283 g_value_set_int (value, dbin->high_percent);
1285 case PROP_MAX_SIZE_BYTES:
1286 g_value_set_uint (value, dbin->max_size_bytes);
1288 case PROP_MAX_SIZE_BUFFERS:
1289 g_value_set_uint (value, dbin->max_size_buffers);
1291 case PROP_MAX_SIZE_TIME:
1292 g_value_set_uint64 (value, dbin->max_size_time);
1294 case PROP_POST_STREAM_TOPOLOGY:
1295 g_value_set_boolean (value, dbin->post_stream_topology);
1297 case PROP_EXPOSE_ALL_STREAMS:
1298 g_value_set_boolean (value, dbin->expose_allstreams);
1300 case PROP_CONNECTION_SPEED:
1301 GST_OBJECT_LOCK (dbin);
1302 g_value_set_uint64 (value, dbin->connection_speed / 1000);
1303 GST_OBJECT_UNLOCK (dbin);
1306 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1313 * Default autoplug signal handlers
1316 gst_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
1319 GST_DEBUG_OBJECT (element, "autoplug-continue returns TRUE");
1321 /* by default we always continue */
1325 static GValueArray *
1326 gst_decode_bin_autoplug_factories (GstElement * element, GstPad * pad,
1330 GValueArray *result;
1331 GstDecodeBin *dbin = GST_DECODE_BIN_CAST (element);
1333 GST_DEBUG_OBJECT (element, "finding factories");
1335 /* return all compatible factories for caps */
1336 g_mutex_lock (dbin->factories_lock);
1337 gst_decode_bin_update_factories_list (dbin);
1339 gst_element_factory_list_filter (dbin->factories, caps, GST_PAD_SINK,
1341 g_mutex_unlock (dbin->factories_lock);
1343 result = g_value_array_new (g_list_length (list));
1344 for (tmp = list; tmp; tmp = tmp->next) {
1345 GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data);
1346 GValue val = { 0, };
1348 g_value_init (&val, G_TYPE_OBJECT);
1349 g_value_set_object (&val, factory);
1350 g_value_array_append (result, &val);
1351 g_value_unset (&val);
1353 gst_plugin_feature_list_free (list);
1355 GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result);
1360 static GValueArray *
1361 gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad,
1362 GstCaps * caps, GValueArray * factories)
1367 static GstAutoplugSelectResult
1368 gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad,
1369 GstCaps * caps, GstElementFactory * factory)
1371 GST_DEBUG_OBJECT (element, "default autoplug-select returns TRY");
1374 return GST_AUTOPLUG_SELECT_TRY;
1381 static gboolean are_final_caps (GstDecodeBin * dbin, GstCaps * caps);
1382 static gboolean is_demuxer_element (GstElement * srcelement);
1384 static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src,
1385 GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GValueArray * factories,
1386 GstDecodeChain * chain);
1387 static gboolean connect_element (GstDecodeBin * dbin, GstElement * element,
1388 GstDecodeChain * chain);
1389 static void expose_pad (GstDecodeBin * dbin, GstElement * src,
1390 GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GstDecodeChain * chain);
1392 static void pad_added_cb (GstElement * element, GstPad * pad,
1393 GstDecodeChain * chain);
1394 static void pad_removed_cb (GstElement * element, GstPad * pad,
1395 GstDecodeChain * chain);
1396 static void no_more_pads_cb (GstElement * element, GstDecodeChain * chain);
1398 static GstDecodeGroup *gst_decode_chain_get_current_group (GstDecodeChain *
1401 /* called when a new pad is discovered. It will perform some basic actions
1402 * before trying to link something to it.
1404 * - Check the caps, don't do anything when there are no caps or when they have
1406 * - signal AUTOPLUG_CONTINUE to check if we need to continue autoplugging this
1408 * - if the caps are non-fixed, setup a handler to continue autoplugging when
1409 * the caps become fixed (connect to notify::caps).
1410 * - get list of factories to autoplug.
1411 * - continue autoplugging to one of the factories.
1414 analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
1415 GstCaps * caps, GstDecodeChain * chain)
1417 gboolean apcontinue = TRUE;
1418 GValueArray *factories = NULL, *result = NULL;
1420 GstElementFactory *factory;
1421 const gchar *classification;
1422 gboolean is_parser_converter = FALSE;
1425 GST_DEBUG_OBJECT (dbin, "Pad %s:%s caps:%" GST_PTR_FORMAT,
1426 GST_DEBUG_PAD_NAME (pad), caps);
1429 && src != ((GstDecodeElement *) chain->elements->data)->element
1430 && src != ((GstDecodeElement *) chain->elements->data)->capsfilter) {
1431 GST_ERROR_OBJECT (dbin, "New pad from not the last element in this chain");
1435 if (chain->endpad) {
1436 GST_ERROR_OBJECT (dbin, "New pad in a chain that is already complete");
1440 if (chain->demuxer) {
1441 GstDecodeGroup *group;
1442 GstDecodeChain *oldchain = chain;
1444 /* we are adding a new pad for a demuxer (see is_demuxer_element(),
1445 * start a new chain for it */
1446 CHAIN_MUTEX_LOCK (oldchain);
1447 group = gst_decode_chain_get_current_group (chain);
1449 chain = gst_decode_chain_new (dbin, group, pad);
1450 group->children = g_list_prepend (group->children, chain);
1452 CHAIN_MUTEX_UNLOCK (oldchain);
1454 GST_WARNING_OBJECT (dbin, "No current group");
1459 if ((caps == NULL) || gst_caps_is_empty (caps))
1462 if (gst_caps_is_any (caps))
1465 dpad = gst_decode_pad_new (dbin, pad, chain);
1467 /* 1. Emit 'autoplug-continue' the result will tell us if this pads needs
1468 * further autoplugging. Only do this for fixed caps, for unfixed caps
1469 * we will later come here again from the notify::caps handler. The
1470 * problem with unfixed caps is that we can reliably tell if the output
1471 * is e.g. accepted by a sink because only parts of the possible final
1472 * caps might be accepted by the sink. */
1473 if (gst_caps_is_fixed (caps))
1474 g_signal_emit (G_OBJECT (dbin),
1475 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, caps,
1480 /* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */
1481 if ((!apcontinue) || are_final_caps (dbin, caps))
1484 /* 1.b For Parser/Converter that can output different stream formats
1485 * we insert a capsfilter with the sorted caps of all possible next
1486 * elements and continue with the capsfilter srcpad */
1487 factory = gst_element_get_factory (src);
1488 classification = gst_element_factory_get_klass (factory);
1489 is_parser_converter = (strstr (classification, "Parser")
1490 && strstr (classification, "Converter"));
1492 /* 1.c when the caps are not fixed yet, we can't be sure what element to
1493 * connect. We delay autoplugging until the caps are fixed */
1494 if (!is_parser_converter && !gst_caps_is_fixed (caps))
1497 /* 1.d else get the factories and if there's no compatible factory goto
1499 g_signal_emit (G_OBJECT (dbin),
1500 gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, dpad, caps,
1503 /* NULL means that we can expose the pad */
1504 if (factories == NULL)
1507 /* if the array is empty, we have a type for which we have no decoder */
1508 if (factories->n_values == 0) {
1509 if (!dbin->expose_allstreams) {
1510 GstCaps *raw = gst_static_caps_get (&default_raw_caps);
1512 /* If the caps are raw, this just means we don't want to expose them */
1513 if (gst_caps_can_intersect (raw, caps)) {
1514 g_value_array_free (factories);
1515 gst_caps_unref (raw);
1516 gst_object_unref (dpad);
1517 goto discarded_type;
1519 gst_caps_unref (raw);
1522 /* if not we have a unhandled type with no compatible factories */
1523 g_value_array_free (factories);
1524 gst_object_unref (dpad);
1528 /* 1.e sort some more. */
1529 g_signal_emit (G_OBJECT (dbin),
1530 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, dpad, caps, factories,
1533 g_value_array_free (factories);
1537 /* At this point we have a potential decoder, but we might not need it
1538 * if it doesn't match the output caps */
1539 if (!dbin->expose_allstreams && gst_caps_is_fixed (caps)) {
1542 gboolean dontuse = FALSE;
1544 GST_DEBUG ("Checking if we can abort early");
1546 /* 1.f Do an early check to see if the candidates are potential decoders, but
1547 * due to the fact that they decode to a mediatype that is not final we don't
1550 for (i = 0; i < factories->n_values && !dontuse; i++) {
1551 GstElementFactory *factory =
1552 g_value_get_object (g_value_array_get_nth (factories, i));
1555 /* We are only interested in skipping decoders */
1556 if (strstr (gst_element_factory_get_klass (factory), "Decoder")) {
1558 GST_DEBUG ("Trying factory %s",
1559 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1561 /* Check the source pad template caps to see if they match raw caps but don't match
1563 for (tmps = gst_element_factory_get_static_pad_templates (factory);
1564 tmps && !dontuse; tmps = tmps->next) {
1565 GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data;
1566 if (st->direction != GST_PAD_SRC)
1568 tcaps = gst_static_pad_template_get_caps (st);
1572 /* Emit autoplug-continue to see if the caps are considered to be raw caps */
1573 g_signal_emit (G_OBJECT (dbin),
1574 gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, tcaps,
1577 /* If autoplug-continue returns TRUE and the caps are not final, don't use them */
1578 if (apcontinue && !are_final_caps (dbin, tcaps))
1580 gst_caps_unref (tcaps);
1586 gst_object_unref (dpad);
1587 g_value_array_free (factories);
1588 goto discarded_type;
1592 /* 1.g now get the factory template caps and insert the capsfilter if this
1593 * is a parser/converter
1595 if (is_parser_converter) {
1596 GstCaps *filter_caps;
1599 GstDecodeElement *delem;
1601 g_assert (chain->elements != NULL);
1602 delem = (GstDecodeElement *) chain->elements->data;
1604 filter_caps = gst_caps_new_empty ();
1605 for (i = 0; i < factories->n_values; i++) {
1606 GstElementFactory *factory =
1607 g_value_get_object (g_value_array_get_nth (factories, i));
1608 GstCaps *tcaps, *intersection;
1611 GST_DEBUG ("Trying factory %s",
1612 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1614 if (gst_element_get_factory (src) == factory) {
1615 GST_DEBUG ("Skipping factory");
1619 for (tmps = gst_element_factory_get_static_pad_templates (factory); tmps;
1620 tmps = tmps->next) {
1621 GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data;
1622 if (st->direction != GST_PAD_SINK || st->presence != GST_PAD_ALWAYS)
1624 tcaps = gst_static_pad_template_get_caps (st);
1626 gst_caps_intersect_full (tcaps, caps, GST_CAPS_INTERSECT_FIRST);
1627 filter_caps = gst_caps_merge (filter_caps, intersection);
1628 gst_caps_unref (tcaps);
1632 /* Append the parser caps to prevent any not-negotiated errors */
1633 filter_caps = gst_caps_merge (filter_caps, gst_caps_ref (caps));
1635 delem->capsfilter = gst_element_factory_make ("capsfilter", NULL);
1636 g_object_set (G_OBJECT (delem->capsfilter), "caps", filter_caps, NULL);
1637 gst_caps_unref (filter_caps);
1638 gst_element_set_state (delem->capsfilter, GST_STATE_PAUSED);
1639 gst_bin_add (GST_BIN_CAST (dbin), gst_object_ref (delem->capsfilter));
1641 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1642 p = gst_element_get_static_pad (delem->capsfilter, "sink");
1643 gst_pad_link_full (pad, p, GST_PAD_LINK_CHECK_NOTHING);
1644 gst_object_unref (p);
1645 p = gst_element_get_static_pad (delem->capsfilter, "src");
1646 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), p);
1649 if (!gst_caps_is_fixed (caps)) {
1650 g_value_array_free (factories);
1655 /* 1.h else continue autoplugging something from the list. */
1656 GST_LOG_OBJECT (pad, "Let's continue discovery on this pad");
1657 res = connect_pad (dbin, src, dpad, pad, caps, factories, chain);
1659 /* Need to unref the capsfilter srcpad here if
1660 * we inserted a capsfilter */
1661 if (is_parser_converter)
1662 gst_object_unref (pad);
1664 gst_object_unref (dpad);
1665 g_value_array_free (factories);
1674 GST_LOG_OBJECT (dbin, "Pad is final. autoplug-continue:%d", apcontinue);
1675 expose_pad (dbin, src, dpad, pad, caps, chain);
1676 gst_object_unref (dpad);
1682 GST_LOG_OBJECT (pad, "Known type, but discarded because not final caps");
1683 chain->deadend = TRUE;
1684 chain->endcaps = gst_caps_ref (caps);
1686 /* Try to expose anything */
1688 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
1689 gst_decode_bin_expose (dbin);
1691 EXPOSE_UNLOCK (dbin);
1692 do_async_done (dbin);
1699 GST_LOG_OBJECT (pad, "Unknown type, posting message and firing signal");
1701 chain->deadend = TRUE;
1702 chain->endcaps = gst_caps_ref (caps);
1704 gst_element_post_message (GST_ELEMENT_CAST (dbin),
1705 gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
1707 g_signal_emit (G_OBJECT (dbin),
1708 gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
1710 /* Try to expose anything */
1712 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
1713 gst_decode_bin_expose (dbin);
1715 EXPOSE_UNLOCK (dbin);
1717 if (src == dbin->typefind) {
1720 if (caps && !gst_caps_is_empty (caps)) {
1721 desc = gst_pb_utils_get_decoder_description (caps);
1722 GST_ELEMENT_ERROR (dbin, STREAM, CODEC_NOT_FOUND,
1723 (_("A %s plugin is required to play this stream, "
1724 "but not installed."), desc),
1725 ("No decoder to handle media type '%s'",
1726 gst_structure_get_name (gst_caps_get_structure (caps, 0))));
1729 GST_ELEMENT_ERROR (dbin, STREAM, TYPE_NOT_FOUND,
1730 (_("Could not determine type of stream")),
1731 ("Stream caps %" GST_PTR_FORMAT, caps));
1733 do_async_done (dbin);
1739 GST_DEBUG_OBJECT (pad, "pad has non-fixed caps delay autoplugging");
1740 gst_object_unref (dpad);
1741 goto setup_caps_delay;
1745 GST_DEBUG_OBJECT (pad, "pad has ANY caps, delaying auto-pluggin");
1746 goto setup_caps_delay;
1750 GstPendingPad *ppad;
1752 /* connect to caps notification */
1753 CHAIN_MUTEX_LOCK (chain);
1754 GST_LOG_OBJECT (dbin, "Chain %p has now %d dynamic pads", chain,
1755 g_list_length (chain->pending_pads));
1756 ppad = g_slice_new0 (GstPendingPad);
1757 ppad->pad = gst_object_ref (pad);
1758 ppad->chain = chain;
1759 ppad->event_probe_id =
1760 gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
1761 pad_event_cb, ppad, NULL);
1762 chain->pending_pads = g_list_prepend (chain->pending_pads, ppad);
1763 g_signal_connect (G_OBJECT (pad), "notify::caps",
1764 G_CALLBACK (caps_notify_cb), chain);
1765 CHAIN_MUTEX_UNLOCK (chain);
1767 /* If we're here because we have a Parser/Converter
1768 * we have to unref the pad */
1769 if (is_parser_converter)
1770 gst_object_unref (pad);
1777 add_error_filter (GstDecodeBin * dbin, GstElement * element)
1779 GST_OBJECT_LOCK (dbin);
1780 dbin->filtered = g_list_prepend (dbin->filtered, element);
1781 GST_OBJECT_UNLOCK (dbin);
1785 remove_error_filter (GstDecodeBin * dbin, GstElement * element)
1787 GST_OBJECT_LOCK (dbin);
1788 dbin->filtered = g_list_remove (dbin->filtered, element);
1789 GST_OBJECT_UNLOCK (dbin);
1794 * Try to connect the given pad to an element created from one of the factories,
1797 * Note that dpad is ghosting pad, and so pad is linked; be sure to unset dpad's
1798 * target before trying to link pad.
1800 * Returns TRUE if an element was properly created and linked
1803 connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
1804 GstPad * pad, GstCaps * caps, GValueArray * factories,
1805 GstDecodeChain * chain)
1807 gboolean res = FALSE;
1808 GstPad *mqpad = NULL;
1809 gboolean is_demuxer = chain->parent && !chain->elements; /* First pad after the demuxer */
1811 g_return_val_if_fail (factories != NULL, FALSE);
1812 g_return_val_if_fail (factories->n_values > 0, FALSE);
1814 GST_DEBUG_OBJECT (dbin,
1815 "pad %s:%s , chain:%p, %d factories, caps %" GST_PTR_FORMAT,
1816 GST_DEBUG_PAD_NAME (pad), chain, factories->n_values, caps);
1818 /* 1. is element demuxer or parser */
1820 GST_LOG_OBJECT (src,
1821 "is a demuxer, connecting the pad through multiqueue '%s'",
1822 GST_OBJECT_NAME (chain->parent->multiqueue));
1824 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1825 if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad)))
1827 src = chain->parent->multiqueue;
1829 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
1832 /* 2. Try to create an element and link to it */
1833 while (factories->n_values > 0) {
1834 GstAutoplugSelectResult ret;
1835 GstElementFactory *factory;
1836 GstDecodeElement *delem;
1837 GstElement *element;
1842 /* Set dpad target to pad again, it might've been unset
1843 * below but we came back here because something failed
1845 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
1847 /* take first factory */
1848 factory = g_value_get_object (g_value_array_get_nth (factories, 0));
1849 /* Remove selected factory from the list. */
1850 g_value_array_remove (factories, 0);
1852 GST_LOG_OBJECT (src, "trying factory %" GST_PTR_FORMAT, factory);
1854 /* Check if the caps are really supported by the factory. The
1855 * factory list is non-empty-subset filtered while caps
1856 * are only accepted by a pad if they are a subset of the
1859 * FIXME: Only do this for fixed caps here. Non-fixed caps
1860 * can happen if a Parser/Converter was autoplugged before
1861 * this. We then assume that it will be able to convert to
1862 * everything that the decoder would want.
1864 * A subset check will fail here because the parser caps
1865 * will be generic and while the decoder will only
1866 * support a subset of the parser caps.
1868 if (gst_caps_is_fixed (caps)) {
1869 const GList *templs;
1870 gboolean skip = FALSE;
1872 templs = gst_element_factory_get_static_pad_templates (factory);
1875 GstStaticPadTemplate *templ = (GstStaticPadTemplate *) templs->data;
1877 if (templ->direction == GST_PAD_SINK) {
1878 GstCaps *templcaps = gst_static_caps_get (&templ->static_caps);
1880 if (!gst_caps_is_subset (caps, templcaps)) {
1881 GST_DEBUG_OBJECT (src,
1882 "caps %" GST_PTR_FORMAT " not subset of %" GST_PTR_FORMAT, caps,
1884 gst_caps_unref (templcaps);
1889 gst_caps_unref (templcaps);
1891 templs = g_list_next (templs);
1897 /* If the factory is for a parser we first check if the factory
1898 * was already used for the current chain. If it was used already
1899 * we would otherwise create an infinite loop here because the
1900 * parser apparently accepts its own output as input.
1901 * This is only done for parsers because it's perfectly valid
1902 * to have other element classes after each other because a
1903 * parser is the only one that does not change the data. A
1904 * valid example for this would be multiple id3demux in a row.
1906 if (strstr (gst_element_factory_get_klass (factory), "Parser")) {
1907 gboolean skip = FALSE;
1910 CHAIN_MUTEX_LOCK (chain);
1911 for (l = chain->elements; l; l = l->next) {
1912 GstDecodeElement *delem = (GstDecodeElement *) l->data;
1913 GstElement *otherelement = delem->element;
1915 if (gst_element_get_factory (otherelement) == factory) {
1920 CHAIN_MUTEX_UNLOCK (chain);
1922 GST_DEBUG_OBJECT (dbin,
1923 "Skipping factory '%s' because it was already used in this chain",
1924 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory)));
1929 /* emit autoplug-select to see what we should do with it. */
1930 g_signal_emit (G_OBJECT (dbin),
1931 gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT],
1932 0, dpad, caps, factory, &ret);
1935 case GST_AUTOPLUG_SELECT_TRY:
1936 GST_DEBUG_OBJECT (dbin, "autoplug select requested try");
1938 case GST_AUTOPLUG_SELECT_EXPOSE:
1939 GST_DEBUG_OBJECT (dbin, "autoplug select requested expose");
1940 /* expose the pad, we don't have the source element */
1941 expose_pad (dbin, src, dpad, pad, caps, chain);
1944 case GST_AUTOPLUG_SELECT_SKIP:
1945 GST_DEBUG_OBJECT (dbin, "autoplug select requested skip");
1948 GST_WARNING_OBJECT (dbin, "autoplug select returned unhandled %d", ret);
1952 /* 2.0. Unlink pad */
1953 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
1955 /* 2.1. Try to create an element */
1956 if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
1957 GST_WARNING_OBJECT (dbin, "Could not create an element from %s",
1958 gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
1962 /* Filter errors, this will prevent the element from causing the pipeline
1963 * to error while we test it using READY state. */
1964 add_error_filter (dbin, element);
1966 /* ... add it ... */
1967 if (!(gst_bin_add (GST_BIN_CAST (dbin), element))) {
1968 GST_WARNING_OBJECT (dbin, "Couldn't add %s to the bin",
1969 GST_ELEMENT_NAME (element));
1970 remove_error_filter (dbin, element);
1971 gst_object_unref (element);
1975 /* Find its sink pad. */
1976 if (!(sinkpad = find_sink_pad (element))) {
1977 GST_WARNING_OBJECT (dbin, "Element %s doesn't have a sink pad",
1978 GST_ELEMENT_NAME (element));
1979 remove_error_filter (dbin, element);
1980 gst_bin_remove (GST_BIN (dbin), element);
1984 /* ... and try to link */
1985 if ((gst_pad_link (pad, sinkpad)) != GST_PAD_LINK_OK) {
1986 GST_WARNING_OBJECT (dbin, "Link failed on pad %s:%s",
1987 GST_DEBUG_PAD_NAME (sinkpad));
1988 remove_error_filter (dbin, element);
1989 gst_object_unref (sinkpad);
1990 gst_bin_remove (GST_BIN (dbin), element);
1994 /* ... activate it ... */
1995 if ((gst_element_set_state (element,
1996 GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) {
1997 GST_WARNING_OBJECT (dbin, "Couldn't set %s to READY",
1998 GST_ELEMENT_NAME (element));
1999 remove_error_filter (dbin, element);
2000 gst_object_unref (sinkpad);
2001 gst_bin_remove (GST_BIN (dbin), element);
2005 /* Stop filtering errors. */
2006 remove_error_filter (dbin, element);
2008 gst_object_unref (sinkpad);
2009 GST_LOG_OBJECT (dbin, "linked on pad %s:%s", GST_DEBUG_PAD_NAME (pad));
2011 CHAIN_MUTEX_LOCK (chain);
2012 delem = g_slice_new (GstDecodeElement);
2013 delem->element = gst_object_ref (element);
2014 delem->capsfilter = NULL;
2015 chain->elements = g_list_prepend (chain->elements, delem);
2016 chain->demuxer = is_demuxer_element (element);
2017 CHAIN_MUTEX_UNLOCK (chain);
2019 /* Set connection-speed property if needed */
2020 if (chain->demuxer == TRUE) {
2023 if ((pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element),
2024 "connection-speed"))) {
2025 guint64 speed = dbin->connection_speed / 1000;
2026 gboolean wrong_type = FALSE;
2028 if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT) {
2029 GParamSpecUInt *pspecuint = G_PARAM_SPEC_UINT (pspec);
2031 speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum);
2032 } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT) {
2033 GParamSpecInt *pspecint = G_PARAM_SPEC_INT (pspec);
2035 speed = CLAMP (speed, pspecint->minimum, pspecint->maximum);
2036 } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT64) {
2037 GParamSpecUInt64 *pspecuint = G_PARAM_SPEC_UINT64 (pspec);
2039 speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum);
2040 } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT64) {
2041 GParamSpecInt64 *pspecint = G_PARAM_SPEC_INT64 (pspec);
2043 speed = CLAMP (speed, pspecint->minimum, pspecint->maximum);
2045 GST_WARNING_OBJECT (dbin,
2046 "The connection speed property %" G_GUINT64_FORMAT " of type %s"
2047 " is not usefull not setting it", speed,
2048 g_type_name (G_PARAM_SPEC_TYPE (pspec)));
2052 if (wrong_type == FALSE) {
2053 GST_DEBUG_OBJECT (dbin, "setting connection-speed=%" G_GUINT64_FORMAT
2054 " to demuxer element", speed);
2056 g_object_set (element, "connection-speed", speed, NULL);
2061 /* link this element further */
2062 connect_element (dbin, element, chain);
2064 /* try to configure the subtitle encoding property when we can */
2065 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element),
2066 "subtitle-encoding");
2067 if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_STRING) {
2068 SUBTITLE_LOCK (dbin);
2069 GST_DEBUG_OBJECT (dbin,
2070 "setting subtitle-encoding=%s to element", dbin->encoding);
2071 g_object_set (G_OBJECT (element), "subtitle-encoding", dbin->encoding,
2073 SUBTITLE_UNLOCK (dbin);
2079 /* Bring the element to the state of the parent */
2080 if ((gst_element_set_state (element,
2081 GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE) {
2082 GstDecodeElement *dtmp = NULL;
2083 GstElement *tmp = NULL;
2085 GST_WARNING_OBJECT (dbin, "Couldn't set %s to PAUSED",
2086 GST_ELEMENT_NAME (element));
2088 /* Remove all elements in this chain that were just added. No
2089 * other thread could've added elements in the meantime */
2090 CHAIN_MUTEX_LOCK (chain);
2094 dtmp = chain->elements->data;
2095 tmp = dtmp->element;
2097 /* Disconnect any signal handlers that might be connected
2098 * in connect_element() or analyze_pad() */
2099 g_signal_handlers_disconnect_by_func (tmp, pad_added_cb, chain);
2100 g_signal_handlers_disconnect_by_func (tmp, pad_removed_cb, chain);
2101 g_signal_handlers_disconnect_by_func (tmp, no_more_pads_cb, chain);
2103 for (l = chain->pending_pads; l;) {
2104 GstPendingPad *pp = l->data;
2107 if (GST_PAD_PARENT (pp->pad) != tmp) {
2112 g_signal_handlers_disconnect_by_func (pp->pad, caps_notify_cb, chain);
2113 gst_pad_remove_probe (pp->pad, pp->event_probe_id);
2114 gst_object_unref (pp->pad);
2115 g_slice_free (GstPendingPad, pp);
2117 /* Remove element from the list, update list head and go to the
2118 * next element in the list */
2120 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2124 if (dtmp->capsfilter) {
2125 gst_bin_remove (GST_BIN (dbin), dtmp->capsfilter);
2126 gst_element_set_state (dtmp->capsfilter, GST_STATE_NULL);
2127 gst_object_unref (dtmp->capsfilter);
2130 gst_bin_remove (GST_BIN (dbin), tmp);
2131 gst_element_set_state (tmp, GST_STATE_NULL);
2133 gst_object_unref (tmp);
2134 g_slice_free (GstDecodeElement, dtmp);
2136 chain->elements = g_list_delete_link (chain->elements, chain->elements);
2137 } while (tmp != element);
2138 CHAIN_MUTEX_UNLOCK (chain);
2143 SUBTITLE_LOCK (dbin);
2144 /* we added the element now, add it to the list of subtitle-encoding
2145 * elements when we can set the property */
2146 dbin->subtitles = g_list_prepend (dbin->subtitles, element);
2147 SUBTITLE_UNLOCK (dbin);
2156 gst_object_unref (mqpad);
2162 get_pad_caps (GstPad * pad)
2166 /* first check the pad caps, if this is set, we are positively sure it is
2167 * fixed and exactly what the element will produce. */
2168 caps = gst_pad_get_current_caps (pad);
2170 /* then use the getcaps function if we don't have caps. These caps might not
2171 * be fixed in some cases, in which case analyze_new_pad will set up a
2172 * notify::caps signal to continue autoplugging. */
2174 caps = gst_pad_query_caps (pad, NULL);
2180 connect_element (GstDecodeBin * dbin, GstElement * element,
2181 GstDecodeChain * chain)
2184 gboolean res = TRUE;
2185 gboolean dynamic = FALSE;
2186 GList *to_connect = NULL;
2188 GST_DEBUG_OBJECT (dbin, "Attempting to connect element %s [chain:%p] further",
2189 GST_ELEMENT_NAME (element), chain);
2191 /* 1. Loop over pad templates, grabbing existing pads along the way */
2192 for (pads = GST_ELEMENT_GET_CLASS (element)->padtemplates; pads;
2193 pads = g_list_next (pads)) {
2194 GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
2195 const gchar *templ_name;
2197 /* we are only interested in source pads */
2198 if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
2201 templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
2202 GST_DEBUG_OBJECT (dbin, "got a source pad template %s", templ_name);
2204 /* figure out what kind of pad this is */
2205 switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
2206 case GST_PAD_ALWAYS:
2208 /* get the pad that we need to autoplug */
2209 GstPad *pad = gst_element_get_static_pad (element, templ_name);
2212 GST_DEBUG_OBJECT (dbin, "got the pad for always template %s",
2214 /* here is the pad, we need to autoplug it */
2215 to_connect = g_list_prepend (to_connect, pad);
2217 /* strange, pad is marked as always but it's not
2218 * there. Fix the element */
2219 GST_WARNING_OBJECT (dbin,
2220 "could not get the pad for always template %s", templ_name);
2224 case GST_PAD_SOMETIMES:
2226 /* try to get the pad to see if it is already created or
2228 GstPad *pad = gst_element_get_static_pad (element, templ_name);
2231 GST_DEBUG_OBJECT (dbin, "got the pad for sometimes template %s",
2233 /* the pad is created, we need to autoplug it */
2234 to_connect = g_list_prepend (to_connect, pad);
2236 GST_DEBUG_OBJECT (dbin,
2237 "did not get the sometimes pad of template %s", templ_name);
2238 /* we have an element that will create dynamic pads */
2243 case GST_PAD_REQUEST:
2244 /* ignore request pads */
2245 GST_DEBUG_OBJECT (dbin, "ignoring request padtemplate %s", templ_name);
2250 /* 2. if there are more potential pads, connect to relevant signals */
2252 GST_LOG_OBJECT (dbin, "Adding signals to element %s in chain %p",
2253 GST_ELEMENT_NAME (element), chain);
2254 g_signal_connect (G_OBJECT (element), "pad-added",
2255 G_CALLBACK (pad_added_cb), chain);
2256 g_signal_connect (G_OBJECT (element), "pad-removed",
2257 G_CALLBACK (pad_removed_cb), chain);
2258 g_signal_connect (G_OBJECT (element), "no-more-pads",
2259 G_CALLBACK (no_more_pads_cb), chain);
2262 /* 3. for every available pad, connect it */
2263 for (pads = to_connect; pads; pads = g_list_next (pads)) {
2264 GstPad *pad = GST_PAD_CAST (pads->data);
2267 caps = get_pad_caps (pad);
2268 analyze_new_pad (dbin, element, pad, caps, chain);
2270 gst_caps_unref (caps);
2272 gst_object_unref (pad);
2274 g_list_free (to_connect);
2281 * Expose the given pad on the chain as a decoded pad.
2284 expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad,
2285 GstPad * pad, GstCaps * caps, GstDecodeChain * chain)
2287 GstPad *mqpad = NULL;
2289 GST_DEBUG_OBJECT (dbin, "pad %s:%s, chain:%p",
2290 GST_DEBUG_PAD_NAME (pad), chain);
2292 /* If this is the first pad for this chain, there are no other elements
2293 * and the source element is not the multiqueue we must link through the
2296 * This is the case if a demuxer directly exposed a raw pad.
2298 if (chain->parent && !chain->elements && src != chain->parent->multiqueue) {
2299 GST_LOG_OBJECT (src, "connecting the pad through multiqueue");
2301 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL);
2302 if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad)))
2305 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
2308 gst_decode_pad_activate (dpad, chain);
2309 chain->endpad = gst_object_ref (dpad);
2310 chain->endcaps = gst_caps_ref (caps);
2313 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2314 gst_decode_bin_expose (dbin);
2316 EXPOSE_UNLOCK (dbin);
2319 gst_object_unref (mqpad);
2325 /* check_upstream_seekable:
2327 * Check if upstream is seekable.
2330 check_upstream_seekable (GstDecodeBin * dbin, GstPad * pad)
2333 gint64 start = -1, stop = -1;
2334 gboolean seekable = FALSE;
2336 query = gst_query_new_seeking (GST_FORMAT_BYTES);
2337 if (!gst_pad_peer_query (pad, query)) {
2338 GST_DEBUG_OBJECT (dbin, "seeking query failed");
2339 gst_query_unref (query);
2343 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
2345 gst_query_unref (query);
2347 /* try harder to query upstream size if we didn't get it the first time */
2348 if (seekable && stop == -1) {
2349 GST_DEBUG_OBJECT (dbin, "doing duration query to fix up unset stop");
2350 gst_pad_peer_query_duration (pad, GST_FORMAT_BYTES, &stop);
2353 /* if upstream doesn't know the size, it's likely that it's not seekable in
2354 * practice even if it technically may be seekable */
2355 if (seekable && (start != 0 || stop <= start)) {
2356 GST_DEBUG_OBJECT (dbin, "seekable but unknown start/stop -> disable");
2360 GST_DEBUG_OBJECT (dbin, "upstream seekable: %d", seekable);
2365 type_found (GstElement * typefind, guint probability,
2366 GstCaps * caps, GstDecodeBin * decode_bin)
2368 GstPad *pad, *sink_pad;
2370 GST_DEBUG_OBJECT (decode_bin, "typefind found caps %" GST_PTR_FORMAT, caps);
2372 /* If the typefinder (but not something else) finds text/plain - i.e. that's
2373 * the top-level type of the file - then error out.
2375 if (gst_structure_has_name (gst_caps_get_structure (caps, 0), "text/plain")) {
2376 GST_ELEMENT_ERROR (decode_bin, STREAM, WRONG_TYPE,
2377 (_("This appears to be a text file")),
2378 ("decodebin cannot decode plain text files"));
2382 /* FIXME: we can only deal with one type, we don't yet support dynamically changing
2383 * caps from the typefind element */
2384 if (decode_bin->have_type || decode_bin->decode_chain)
2387 decode_bin->have_type = TRUE;
2389 pad = gst_element_get_static_pad (typefind, "src");
2390 sink_pad = gst_element_get_static_pad (typefind, "sink");
2392 /* need some lock here to prevent race with shutdown state change
2393 * which might yank away e.g. decode_chain while building stuff here.
2394 * In typical cases, STREAM_LOCK is held and handles that, it need not
2395 * be held (if called from a proxied setcaps), so grab it anyway */
2396 GST_PAD_STREAM_LOCK (sink_pad);
2397 decode_bin->decode_chain = gst_decode_chain_new (decode_bin, NULL, pad);
2398 analyze_new_pad (decode_bin, typefind, pad, caps, decode_bin->decode_chain);
2399 GST_PAD_STREAM_UNLOCK (sink_pad);
2401 gst_object_unref (sink_pad);
2402 gst_object_unref (pad);
2408 static GstPadProbeReturn
2409 pad_event_cb (GstPad * pad, GstPadProbeInfo * info, gpointer data)
2411 GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
2412 GstPendingPad *ppad = (GstPendingPad *) data;
2413 GstDecodeChain *chain = ppad->chain;
2414 GstDecodeBin *dbin = chain->dbin;
2419 switch (GST_EVENT_TYPE (event)) {
2421 GST_DEBUG_OBJECT (dbin, "Received EOS on a non final pad, this stream "
2423 chain->deadend = TRUE;
2424 /* we don't set the endcaps because NULL endcaps means early EOS */
2426 if (gst_decode_chain_is_complete (dbin->decode_chain))
2427 gst_decode_bin_expose (dbin);
2428 EXPOSE_UNLOCK (dbin);
2433 return GST_PAD_PROBE_OK;
2437 pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
2444 GST_DEBUG_OBJECT (pad, "pad added, chain:%p", chain);
2446 caps = get_pad_caps (pad);
2447 analyze_new_pad (dbin, element, pad, caps, chain);
2449 gst_caps_unref (caps);
2452 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2453 GST_LOG_OBJECT (dbin,
2454 "That was the last dynamic object, now attempting to expose the group");
2455 if (!gst_decode_bin_expose (dbin))
2456 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
2458 EXPOSE_UNLOCK (dbin);
2462 pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain)
2466 GST_LOG_OBJECT (pad, "pad removed, chain:%p", chain);
2468 /* In fact, we don't have to do anything here, the active group will be
2469 * removed when the group's multiqueue is drained */
2470 CHAIN_MUTEX_LOCK (chain);
2471 for (l = chain->pending_pads; l; l = l->next) {
2472 GstPendingPad *ppad = l->data;
2473 GstPad *opad = ppad->pad;
2476 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2477 gst_pending_pad_free (ppad);
2478 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2482 CHAIN_MUTEX_UNLOCK (chain);
2486 no_more_pads_cb (GstElement * element, GstDecodeChain * chain)
2488 GstDecodeGroup *group = NULL;
2490 GST_LOG_OBJECT (element, "got no more pads");
2492 CHAIN_MUTEX_LOCK (chain);
2493 if (!chain->elements
2494 || ((GstDecodeElement *) chain->elements->data)->element != element) {
2495 GST_LOG_OBJECT (chain->dbin, "no-more-pads from old chain element '%s'",
2496 GST_OBJECT_NAME (element));
2497 CHAIN_MUTEX_UNLOCK (chain);
2499 } else if (!chain->demuxer) {
2500 GST_LOG_OBJECT (chain->dbin, "no-more-pads from a non-demuxer element '%s'",
2501 GST_OBJECT_NAME (element));
2502 CHAIN_MUTEX_UNLOCK (chain);
2506 /* when we received no_more_pads, we can complete the pads of the chain */
2507 if (!chain->next_groups && chain->active_group) {
2508 group = chain->active_group;
2509 } else if (chain->next_groups) {
2510 group = chain->next_groups->data;
2513 GST_ERROR_OBJECT (chain->dbin, "can't find group for element");
2514 CHAIN_MUTEX_UNLOCK (chain);
2518 GST_DEBUG_OBJECT (element, "Setting group %p to complete", group);
2520 group->no_more_pads = TRUE;
2521 /* this group has prerolled enough to not need more pads,
2522 * we can probably set its buffering state to playing now */
2523 GST_DEBUG_OBJECT (group->dbin, "Setting group %p multiqueue to "
2524 "'playing' buffering mode", group);
2525 decodebin_set_queue_size (group->dbin, group->multiqueue, FALSE,
2526 (group->parent ? group->parent->seekable : TRUE));
2527 CHAIN_MUTEX_UNLOCK (chain);
2529 EXPOSE_LOCK (chain->dbin);
2530 if (gst_decode_chain_is_complete (chain->dbin->decode_chain)) {
2531 gst_decode_bin_expose (chain->dbin);
2533 EXPOSE_UNLOCK (chain->dbin);
2537 caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeChain * chain)
2539 GstElement *element;
2542 GST_LOG_OBJECT (pad, "Notified caps for pad %s:%s", GST_DEBUG_PAD_NAME (pad));
2544 /* Disconnect this; if we still need it, we'll reconnect to this in
2545 * analyze_new_pad */
2546 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2548 element = GST_ELEMENT_CAST (gst_pad_get_parent (pad));
2550 CHAIN_MUTEX_LOCK (chain);
2551 for (l = chain->pending_pads; l; l = l->next) {
2552 GstPendingPad *ppad = l->data;
2553 if (ppad->pad == pad) {
2554 gst_pending_pad_free (ppad);
2555 chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
2559 CHAIN_MUTEX_UNLOCK (chain);
2561 pad_added_cb (element, pad, chain);
2563 gst_object_unref (element);
2566 /* Decide whether an element is a demuxer based on the
2567 * klass and number/type of src pad templates it has */
2569 is_demuxer_element (GstElement * srcelement)
2571 GstElementFactory *srcfactory;
2572 GstElementClass *elemclass;
2575 gint potential_src_pads = 0;
2577 srcfactory = gst_element_get_factory (srcelement);
2578 klass = gst_element_factory_get_klass (srcfactory);
2580 /* Can't be a demuxer unless it has Demux in the klass name */
2581 if (!strstr (klass, "Demux"))
2584 /* Walk the src pad templates and count how many the element
2586 elemclass = GST_ELEMENT_GET_CLASS (srcelement);
2588 walk = gst_element_class_get_pad_template_list (elemclass);
2589 while (walk != NULL) {
2590 GstPadTemplate *templ;
2592 templ = (GstPadTemplate *) walk->data;
2593 if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
2594 switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
2595 case GST_PAD_ALWAYS:
2596 case GST_PAD_SOMETIMES:
2597 if (strstr (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), "%"))
2598 potential_src_pads += 2; /* Might make multiple pads */
2600 potential_src_pads += 1;
2602 case GST_PAD_REQUEST:
2603 potential_src_pads += 2;
2607 walk = g_list_next (walk);
2610 if (potential_src_pads < 2)
2616 /* Returns TRUE if the caps are compatible with the caps specified in the 'caps'
2617 * property (which by default are the raw caps)
2619 * The decodebin_lock should be taken !
2622 are_final_caps (GstDecodeBin * dbin, GstCaps * caps)
2626 GST_LOG_OBJECT (dbin, "Checking with caps %" GST_PTR_FORMAT, caps);
2628 /* lock for getting the caps */
2629 GST_OBJECT_LOCK (dbin);
2630 res = gst_caps_can_intersect (dbin->caps, caps);
2631 GST_OBJECT_UNLOCK (dbin);
2633 GST_LOG_OBJECT (dbin, "Caps are %sfinal caps", res ? "" : "not ");
2639 * GstDecodeChain functions
2642 /* gst_decode_chain_get_current_group:
2644 * Returns the current group of this chain, to which
2645 * new chains should be attached or NULL if the last
2646 * group didn't have no-more-pads.
2648 * Not MT-safe: Call with parent chain lock!
2650 static GstDecodeGroup *
2651 gst_decode_chain_get_current_group (GstDecodeChain * chain)
2653 GstDecodeGroup *group;
2655 if (!chain->next_groups && chain->active_group
2656 && chain->active_group->overrun && !chain->active_group->no_more_pads) {
2657 GST_WARNING_OBJECT (chain->dbin,
2658 "Currently active group %p is exposed"
2659 " and wants to add a new pad without having signaled no-more-pads",
2660 chain->active_group);
2664 if (chain->next_groups && (group = chain->next_groups->data) && group->overrun
2665 && !group->no_more_pads) {
2666 GST_WARNING_OBJECT (chain->dbin,
2667 "Currently newest pending group %p "
2668 "had overflow but didn't signal no-more-pads", group);
2672 /* Now we know that we can really return something useful */
2673 if (!chain->active_group) {
2674 chain->active_group = group = gst_decode_group_new (chain->dbin, chain);
2675 } else if (!chain->active_group->overrun
2676 && !chain->active_group->no_more_pads) {
2677 group = chain->active_group;
2678 } else if (chain->next_groups && (group = chain->next_groups->data)
2679 && !group->overrun && !group->no_more_pads) {
2680 /* group = chain->next_groups->data */
2682 group = gst_decode_group_new (chain->dbin, chain);
2683 chain->next_groups = g_list_prepend (chain->next_groups, group);
2689 static void gst_decode_group_free_internal (GstDecodeGroup * group,
2693 gst_decode_chain_free_internal (GstDecodeChain * chain, gboolean hide)
2697 CHAIN_MUTEX_LOCK (chain);
2699 GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hiding" : "Freeing"),
2702 if (chain->active_group) {
2703 gst_decode_group_free_internal (chain->active_group, hide);
2705 chain->active_group = NULL;
2708 for (l = chain->next_groups; l; l = l->next) {
2709 gst_decode_group_free_internal ((GstDecodeGroup *) l->data, hide);
2714 g_list_free (chain->next_groups);
2715 chain->next_groups = NULL;
2719 for (l = chain->old_groups; l; l = l->next) {
2720 GstDecodeGroup *group = l->data;
2722 gst_decode_group_free (group);
2724 g_list_free (chain->old_groups);
2725 chain->old_groups = NULL;
2728 for (l = chain->pending_pads; l; l = l->next) {
2729 GstPendingPad *ppad = l->data;
2730 GstPad *pad = ppad->pad;
2732 g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain);
2733 gst_pending_pad_free (ppad);
2736 g_list_free (chain->pending_pads);
2737 chain->pending_pads = NULL;
2739 for (l = chain->elements; l; l = l->next) {
2740 GstDecodeElement *delem = l->data;
2741 GstElement *element = delem->element;
2743 g_signal_handlers_disconnect_by_func (element, pad_added_cb, chain);
2744 g_signal_handlers_disconnect_by_func (element, pad_removed_cb, chain);
2745 g_signal_handlers_disconnect_by_func (element, no_more_pads_cb, chain);
2747 if (delem->capsfilter) {
2748 if (GST_OBJECT_PARENT (delem->capsfilter) ==
2749 GST_OBJECT_CAST (chain->dbin))
2750 gst_bin_remove (GST_BIN_CAST (chain->dbin), delem->capsfilter);
2752 gst_element_set_state (delem->capsfilter, GST_STATE_NULL);
2756 if (GST_OBJECT_PARENT (element) == GST_OBJECT_CAST (chain->dbin))
2757 gst_bin_remove (GST_BIN_CAST (chain->dbin), element);
2759 gst_element_set_state (element, GST_STATE_NULL);
2762 SUBTITLE_LOCK (chain->dbin);
2763 /* remove possible subtitle element */
2764 chain->dbin->subtitles = g_list_remove (chain->dbin->subtitles, element);
2765 SUBTITLE_UNLOCK (chain->dbin);
2768 if (delem->capsfilter) {
2769 gst_object_unref (delem->capsfilter);
2770 delem->capsfilter = NULL;
2773 gst_object_unref (element);
2776 g_slice_free (GstDecodeElement, delem);
2780 g_list_free (chain->elements);
2781 chain->elements = NULL;
2784 if (chain->endpad) {
2785 if (chain->endpad->exposed) {
2786 gst_element_remove_pad (GST_ELEMENT_CAST (chain->dbin),
2787 GST_PAD_CAST (chain->endpad));
2790 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->endpad), NULL);
2791 chain->endpad->exposed = FALSE;
2793 gst_object_unref (chain->endpad);
2794 chain->endpad = NULL;
2799 gst_object_unref (chain->pad);
2803 if (chain->endcaps) {
2804 gst_caps_unref (chain->endcaps);
2805 chain->endcaps = NULL;
2808 GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hidden" : "Freed"),
2810 CHAIN_MUTEX_UNLOCK (chain);
2812 g_mutex_free (chain->lock);
2813 g_slice_free (GstDecodeChain, chain);
2817 /* gst_decode_chain_free:
2819 * Completely frees and removes the chain and all
2820 * child groups from decodebin.
2822 * MT-safe, don't hold the chain lock or any child chain's lock
2823 * when calling this!
2826 gst_decode_chain_free (GstDecodeChain * chain)
2828 gst_decode_chain_free_internal (chain, FALSE);
2831 /* gst_decode_chain_new:
2833 * Creates a new decode chain and initializes it.
2835 * It's up to the caller to add it to the list of child chains of
2838 static GstDecodeChain *
2839 gst_decode_chain_new (GstDecodeBin * dbin, GstDecodeGroup * parent,
2842 GstDecodeChain *chain = g_slice_new0 (GstDecodeChain);
2844 GST_DEBUG_OBJECT (dbin, "Creating new chain %p with parent group %p", chain,
2848 chain->parent = parent;
2849 chain->lock = g_mutex_new ();
2850 chain->pad = gst_object_ref (pad);
2856 * GstDecodeGroup functions
2859 /* The overrun callback is used to expose groups that have not yet had their
2860 * no_more_pads called while the (large) multiqueue overflowed. When this
2861 * happens we must assume that the no_more_pads will not arrive anymore and we
2862 * must expose the pads that we have.
2865 multi_queue_overrun_cb (GstElement * queue, GstDecodeGroup * group)
2871 GST_LOG_OBJECT (dbin, "multiqueue '%s' (%p) is full", GST_OBJECT_NAME (queue),
2874 group->overrun = TRUE;
2875 /* this group has prerolled enough to not need more pads,
2876 * we can probably set its buffering state to playing now */
2877 GST_DEBUG_OBJECT (group->dbin, "Setting group %p multiqueue to "
2878 "'playing' buffering mode", group);
2879 decodebin_set_queue_size (group->dbin, group->multiqueue, FALSE,
2880 (group->parent ? group->parent->seekable : TRUE));
2882 /* FIXME: We should make sure that everything gets exposed now
2883 * even if child chains are not complete because the will never
2884 * be complete! Ignore any non-complete chains when exposing
2885 * and never expose them later
2889 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
2890 if (!gst_decode_bin_expose (dbin))
2891 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
2893 EXPOSE_UNLOCK (group->dbin);
2897 gst_decode_group_free_internal (GstDecodeGroup * group, gboolean hide)
2901 GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hiding" : "Freeing"),
2903 for (l = group->children; l; l = l->next) {
2904 GstDecodeChain *chain = (GstDecodeChain *) l->data;
2906 gst_decode_chain_free_internal (chain, hide);
2911 g_list_free (group->children);
2912 group->children = NULL;
2916 for (l = group->reqpads; l; l = l->next) {
2917 GstPad *pad = l->data;
2919 gst_element_release_request_pad (group->multiqueue, pad);
2920 gst_object_unref (pad);
2923 g_list_free (group->reqpads);
2924 group->reqpads = NULL;
2927 if (group->multiqueue) {
2928 if (group->overrunsig) {
2929 g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
2930 group->overrunsig = 0;
2933 if (GST_OBJECT_PARENT (group->multiqueue) == GST_OBJECT_CAST (group->dbin))
2934 gst_bin_remove (GST_BIN_CAST (group->dbin), group->multiqueue);
2936 gst_element_set_state (group->multiqueue, GST_STATE_NULL);
2937 gst_object_unref (group->multiqueue);
2938 group->multiqueue = NULL;
2942 GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hided" : "Freed"),
2945 g_slice_free (GstDecodeGroup, group);
2948 /* gst_decode_group_free:
2950 * Completely frees and removes the decode group and all
2953 * Never call this from any streaming thread!
2955 * Not MT-safe, call with parent's chain lock!
2958 gst_decode_group_free (GstDecodeGroup * group)
2960 gst_decode_group_free_internal (group, FALSE);
2963 /* gst_decode_group_hide:
2965 * Hide the decode group only, this means that
2966 * all child endpads are removed from decodebin
2967 * and all signals are unconnected.
2969 * No element is set to NULL state and completely
2972 * Can be called from streaming threads.
2974 * Not MT-safe, call with parent's chain lock!
2977 gst_decode_group_hide (GstDecodeGroup * group)
2979 gst_decode_group_free_internal (group, TRUE);
2982 /* configure queue sizes, this depends on the buffering method and if we are
2983 * playing or prerolling. */
2985 decodebin_set_queue_size (GstDecodeBin * dbin, GstElement * multiqueue,
2986 gboolean preroll, gboolean seekable)
2988 guint max_bytes, max_buffers;
2991 if (preroll || dbin->use_buffering) {
2992 /* takes queue limits, initially we only queue up up to the max bytes limit,
2993 * with a default of 2MB. we use the same values for buffering mode. */
2994 if ((max_bytes = dbin->max_size_bytes) == 0)
2995 max_bytes = AUTO_PREROLL_SIZE_BYTES;
2996 if ((max_buffers = dbin->max_size_buffers) == 0)
2997 max_buffers = AUTO_PREROLL_SIZE_BUFFERS;
2998 if ((max_time = dbin->max_size_time) == 0)
2999 max_time = seekable ? AUTO_PREROLL_SEEKABLE_SIZE_TIME :
3000 AUTO_PREROLL_NOT_SEEKABLE_SIZE_TIME;
3002 /* update runtime limits. At runtime, we try to keep the amount of buffers
3003 * in the queues as low as possible (but at least 5 buffers). */
3004 if ((max_bytes = dbin->max_size_bytes) == 0)
3005 max_bytes = AUTO_PLAY_SIZE_BYTES;
3006 if ((max_buffers = dbin->max_size_buffers) == 0)
3007 max_buffers = AUTO_PLAY_SIZE_BUFFERS;
3008 if ((max_time = dbin->max_size_time) == 0)
3009 max_time = AUTO_PLAY_SIZE_TIME;
3012 g_object_set (multiqueue,
3013 "max-size-bytes", max_bytes, "max-size-time", max_time,
3014 "max-size-buffers", max_buffers, NULL);
3017 /* gst_decode_group_new:
3018 * @dbin: Parent decodebin
3019 * @parent: Parent chain or %NULL
3021 * Creates a new GstDecodeGroup. It is up to the caller to add it to the list
3024 static GstDecodeGroup *
3025 gst_decode_group_new (GstDecodeBin * dbin, GstDecodeChain * parent)
3027 GstDecodeGroup *group = g_slice_new0 (GstDecodeGroup);
3031 GST_DEBUG_OBJECT (dbin, "Creating new group %p with parent chain %p", group,
3035 group->parent = parent;
3037 mq = group->multiqueue = gst_element_factory_make ("multiqueue", NULL);
3038 if (G_UNLIKELY (!group->multiqueue))
3039 goto missing_multiqueue;
3041 /* default is for use-buffering is FALSE */
3042 if (dbin->use_buffering) {
3044 "use-buffering", TRUE,
3045 "low-percent", dbin->low_percent,
3046 "high-percent", dbin->high_percent, NULL);
3049 /* configure queue sizes for preroll */
3051 if (parent && parent->demuxer) {
3052 GstElement *element =
3053 ((GstDecodeElement *) parent->elements->data)->element;
3054 GstPad *pad = gst_element_get_static_pad (element, "sink");
3056 seekable = parent->seekable = check_upstream_seekable (dbin, pad);
3057 gst_object_unref (pad);
3060 decodebin_set_queue_size (dbin, mq, TRUE, seekable);
3062 group->overrunsig = g_signal_connect (G_OBJECT (mq), "overrun",
3063 G_CALLBACK (multi_queue_overrun_cb), group);
3065 gst_bin_add (GST_BIN (dbin), gst_object_ref (mq));
3066 gst_element_set_state (mq, GST_STATE_PAUSED);
3073 gst_element_post_message (GST_ELEMENT_CAST (dbin),
3074 gst_missing_element_message_new (GST_ELEMENT_CAST (dbin),
3076 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no multiqueue!"));
3077 g_slice_free (GstDecodeGroup, group);
3082 /* gst_decode_group_control_demuxer_pad
3084 * Adds a new demuxer srcpad to the given group.
3086 * Returns the srcpad of the multiqueue corresponding the given pad.
3087 * Returns NULL if there was an error.
3090 gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, GstPad * pad)
3093 GstPad *srcpad, *sinkpad;
3094 GstIterator *it = NULL;
3095 GValue item = { 0, };
3099 GST_LOG_OBJECT (dbin, "group:%p pad %s:%s", group, GST_DEBUG_PAD_NAME (pad));
3103 if (G_UNLIKELY (!group->multiqueue))
3106 if (!(sinkpad = gst_element_get_request_pad (group->multiqueue, "sink_%u"))) {
3107 GST_ERROR_OBJECT (dbin, "Couldn't get sinkpad from multiqueue");
3111 if ((gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)) {
3112 GST_ERROR_OBJECT (dbin, "Couldn't link demuxer and multiqueue");
3116 it = gst_pad_iterate_internal_links (sinkpad);
3118 if (!it || (gst_iterator_next (it, &item)) != GST_ITERATOR_OK
3119 || ((srcpad = g_value_dup_object (&item)) == NULL)) {
3120 GST_ERROR_OBJECT (dbin,
3121 "Couldn't get srcpad from multiqueue for sinkpad %" GST_PTR_FORMAT,
3125 CHAIN_MUTEX_LOCK (group->parent);
3126 group->reqpads = g_list_prepend (group->reqpads, gst_object_ref (sinkpad));
3127 CHAIN_MUTEX_UNLOCK (group->parent);
3130 g_value_unset (&item);
3132 gst_iterator_free (it);
3133 gst_object_unref (sinkpad);
3137 gst_element_release_request_pad (group->multiqueue, sinkpad);
3141 /* gst_decode_group_is_complete:
3143 * Checks if the group is complete, this means that
3144 * a) overrun of the multiqueue or no-more-pads happened
3145 * b) all child chains are complete
3147 * Not MT-safe, always call with decodebin expose lock
3150 gst_decode_group_is_complete (GstDecodeGroup * group)
3153 gboolean complete = TRUE;
3155 if (!group->overrun && !group->no_more_pads) {
3160 for (l = group->children; l; l = l->next) {
3161 GstDecodeChain *chain = l->data;
3163 if (!gst_decode_chain_is_complete (chain)) {
3170 GST_DEBUG_OBJECT (group->dbin, "Group %p is complete: %d", group, complete);
3174 /* gst_decode_chain_is_complete:
3176 * Returns TRUE if the chain is complete, this means either
3177 * a) This chain is a dead end, i.e. we have no suitable plugins
3178 * b) This chain ends in an endpad and this is blocked or exposed
3180 * Not MT-safe, always call with decodebin expose lock
3183 gst_decode_chain_is_complete (GstDecodeChain * chain)
3185 gboolean complete = FALSE;
3187 CHAIN_MUTEX_LOCK (chain);
3188 if (chain->deadend) {
3193 if (chain->endpad && (chain->endpad->blocked || chain->endpad->exposed)) {
3198 if (chain->demuxer) {
3199 if (chain->active_group
3200 && gst_decode_group_is_complete (chain->active_group)) {
3207 CHAIN_MUTEX_UNLOCK (chain);
3208 GST_DEBUG_OBJECT (chain->dbin, "Chain %p is complete: %d", chain, complete);
3213 drain_and_switch_chains (GstDecodeChain * chain, GstDecodePad * drainpad,
3214 gboolean * last_group, gboolean * drained, gboolean * switched);
3215 /* drain_and_switch_chains/groups:
3217 * CALL WITH CHAIN LOCK (or group parent) TAKEN !
3219 * Goes down the chains/groups until it finds the chain
3220 * to which the drainpad belongs.
3222 * It marks that pad/chain as drained and then will figure
3223 * out which group to switch to or not.
3225 * last_chain will be set to TRUE if the group to which the
3226 * pad belongs is the last one.
3228 * drained will be set to TRUE if the chain/group is drained.
3230 * Returns: TRUE if the chain contained the target pad */
3232 drain_and_switch_group (GstDecodeGroup * group, GstDecodePad * drainpad,
3233 gboolean * last_group, gboolean * drained, gboolean * switched)
3235 gboolean handled = FALSE;
3236 gboolean alldrained = TRUE;
3239 GST_DEBUG ("Checking group %p (target pad %s:%s)",
3240 group, GST_DEBUG_PAD_NAME (drainpad));
3242 /* Definitely can't be in drained groups */
3243 if (G_UNLIKELY (group->drained)) {
3247 /* Figure out if all our chains are drained with the
3248 * new information */
3249 for (tmp = group->children; tmp; tmp = tmp->next) {
3250 GstDecodeChain *chain = (GstDecodeChain *) tmp->data;
3251 gboolean subdrained = FALSE;
3254 drain_and_switch_chains (chain, drainpad, last_group, &subdrained,
3261 GST_DEBUG ("group %p (last_group:%d, drained:%d, switched:%d, handled:%d)",
3262 group, *last_group, alldrained, *switched, handled);
3263 *drained = alldrained;
3268 drain_and_switch_chains (GstDecodeChain * chain, GstDecodePad * drainpad,
3269 gboolean * last_group, gboolean * drained, gboolean * switched)
3271 gboolean handled = FALSE;
3272 GstDecodeBin *dbin = chain->dbin;
3274 GST_DEBUG ("Checking chain %p (target pad %s:%s)",
3275 chain, GST_DEBUG_PAD_NAME (drainpad));
3277 CHAIN_MUTEX_LOCK (chain);
3279 if (chain->endpad) {
3280 /* Check if we're reached the target endchain */
3281 if (chain == drainpad->chain) {
3282 GST_DEBUG ("Found the target chain");
3283 drainpad->drained = TRUE;
3287 *drained = chain->endpad->drained;
3291 /* We known there are groups to switch to */
3292 if (chain->next_groups)
3293 *last_group = FALSE;
3295 /* Check the active group */
3296 if (chain->active_group) {
3297 gboolean subdrained = FALSE;
3298 handled = drain_and_switch_group (chain->active_group, drainpad,
3299 last_group, &subdrained, switched);
3301 /* The group is drained, see if we can switch to another */
3302 if (handled && subdrained && !*switched) {
3303 if (chain->next_groups) {
3304 /* Switch to next group */
3305 GST_DEBUG_OBJECT (dbin, "Hiding current group %p", chain->active_group);
3306 gst_decode_group_hide (chain->active_group);
3308 g_list_prepend (chain->old_groups, chain->active_group);
3309 GST_DEBUG_OBJECT (dbin, "Switching to next group %p",
3310 chain->next_groups->data);
3311 chain->active_group = chain->next_groups->data;
3312 chain->next_groups =
3313 g_list_delete_link (chain->next_groups, chain->next_groups);
3317 GST_DEBUG ("Group %p was the last in chain %p", chain->active_group,
3320 /* We're drained ! */
3326 CHAIN_MUTEX_UNLOCK (chain);
3328 GST_DEBUG ("Chain %p (handled:%d, last_group:%d, drained:%d, switched:%d)",
3329 chain, handled, *last_group, *drained, *switched);
3332 g_signal_emit (dbin, gst_decode_bin_signals[SIGNAL_DRAINED], 0, NULL);
3337 /* check if the group is drained, meaning all pads have seen an EOS
3340 gst_decode_pad_handle_eos (GstDecodePad * pad)
3342 gboolean last_group = TRUE;
3343 gboolean switched = FALSE;
3344 gboolean drained = FALSE;
3345 GstDecodeChain *chain = pad->chain;
3346 GstDecodeBin *dbin = chain->dbin;
3348 GST_LOG_OBJECT (dbin, "pad %p", pad);
3349 drain_and_switch_chains (dbin->decode_chain, pad, &last_group, &drained,
3353 /* If we resulted in a group switch, expose what's needed */
3355 if (gst_decode_chain_is_complete (dbin->decode_chain))
3356 gst_decode_bin_expose (dbin);
3357 EXPOSE_UNLOCK (dbin);
3363 /* gst_decode_group_is_drained:
3365 * Check is this group is drained and cache this result.
3366 * The group is drained if all child chains are drained.
3368 * Not MT-safe, call with group->parent's lock */
3370 gst_decode_group_is_drained (GstDecodeGroup * group)
3373 gboolean drained = TRUE;
3375 if (group->drained) {
3380 for (l = group->children; l; l = l->next) {
3381 GstDecodeChain *chain = l->data;
3383 CHAIN_MUTEX_LOCK (chain);
3384 if (!gst_decode_chain_is_drained (chain))
3386 CHAIN_MUTEX_UNLOCK (chain);
3390 group->drained = drained;
3393 GST_DEBUG_OBJECT (group->dbin, "Group %p is drained: %d", group, drained);
3397 /* gst_decode_chain_is_drained:
3399 * Check is the chain is drained, which means that
3402 * a) it's endpad is drained
3403 * b) there are no pending pads, the active group is drained
3404 * and there are no next groups
3406 * Not MT-safe, call with chain lock
3409 gst_decode_chain_is_drained (GstDecodeChain * chain)
3411 gboolean drained = FALSE;
3413 if (chain->endpad) {
3414 drained = chain->endpad->drained;
3418 if (chain->pending_pads) {
3423 if (chain->active_group && gst_decode_group_is_drained (chain->active_group)
3424 && !chain->next_groups) {
3430 GST_DEBUG_OBJECT (chain->dbin, "Chain %p is drained: %d", chain, drained);
3435 * GCompareFunc to use with lists of GstPad.
3436 * Sorts pads by mime type.
3437 * First video (raw, then non-raw), then audio (raw, then non-raw),
3440 * Return: negative if a<b, 0 if a==b, positive if a>b
3443 sort_end_pads (GstDecodePad * da, GstDecodePad * db)
3446 GstCaps *capsa, *capsb;
3447 GstStructure *sa, *sb;
3448 const gchar *namea, *nameb;
3450 capsa = get_pad_caps (GST_PAD_CAST (da));
3451 capsb = get_pad_caps (GST_PAD_CAST (db));
3453 sa = gst_caps_get_structure ((const GstCaps *) capsa, 0);
3454 sb = gst_caps_get_structure ((const GstCaps *) capsb, 0);
3456 namea = gst_structure_get_name (sa);
3457 nameb = gst_structure_get_name (sb);
3459 if (g_strrstr (namea, "video/x-raw"))
3461 else if (g_strrstr (namea, "video/"))
3463 else if (g_strrstr (namea, "audio/x-raw"))
3465 else if (g_strrstr (namea, "audio/"))
3470 if (g_strrstr (nameb, "video/x-raw"))
3472 else if (g_strrstr (nameb, "video/"))
3474 else if (g_strrstr (nameb, "audio/x-raw"))
3476 else if (g_strrstr (nameb, "audio/"))
3481 gst_caps_unref (capsa);
3482 gst_caps_unref (capsb);
3488 _gst_element_get_linked_caps (GstElement * src, GstElement * sink,
3494 gboolean done = FALSE;
3495 GstCaps *caps = NULL;
3496 GValue item = { 0, };
3498 it = gst_element_iterate_src_pads (src);
3500 switch (gst_iterator_next (it, &item)) {
3501 case GST_ITERATOR_OK:
3502 pad = g_value_get_object (&item);
3503 peer = gst_pad_get_peer (pad);
3505 parent = gst_pad_get_parent_element (peer);
3506 if (parent == sink) {
3507 caps = gst_pad_get_current_caps (pad);
3509 gst_object_ref (pad);
3516 gst_object_unref (parent);
3517 gst_object_unref (peer);
3519 g_value_reset (&item);
3521 case GST_ITERATOR_RESYNC:
3522 gst_iterator_resync (it);
3524 case GST_ITERATOR_ERROR:
3525 case GST_ITERATOR_DONE:
3530 g_value_unset (&item);
3531 gst_iterator_free (it);
3536 static GQuark topology_structure_name = 0;
3537 static GQuark topology_caps = 0;
3538 static GQuark topology_next = 0;
3539 static GQuark topology_pad = 0;
3540 static GQuark topology_element_srcpad = 0;
3542 /* FIXME: Invent gst_structure_take_structure() to prevent all the
3543 * structure copying for nothing
3545 static GstStructure *
3546 gst_decode_chain_get_topology (GstDecodeChain * chain)
3548 GstStructure *s, *u;
3552 if (G_UNLIKELY ((chain->endpad || chain->deadend)
3553 && (chain->endcaps == NULL))) {
3554 GST_WARNING ("End chain without valid caps !");
3558 u = gst_structure_new_id_empty (topology_structure_name);
3560 /* Now at the last element */
3561 if ((chain->elements || !chain->active_group) &&
3562 (chain->endpad || chain->deadend)) {
3563 s = gst_structure_new_id_empty (topology_structure_name);
3564 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, chain->endcaps,
3567 if (chain->endpad) {
3568 gst_structure_id_set (u, topology_pad, GST_TYPE_PAD, chain->endpad, NULL);
3569 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD,
3570 chain->endpad, NULL);
3572 gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL);
3573 gst_structure_free (u);
3575 } else if (chain->active_group) {
3576 GValue list = { 0, };
3577 GValue item = { 0, };
3579 g_value_init (&list, GST_TYPE_LIST);
3580 g_value_init (&item, GST_TYPE_STRUCTURE);
3581 for (l = chain->active_group->children; l; l = l->next) {
3582 s = gst_decode_chain_get_topology (l->data);
3584 gst_value_set_structure (&item, s);
3585 gst_value_list_append_value (&list, &item);
3586 g_value_reset (&item);
3587 gst_structure_free (s);
3590 gst_structure_id_set_value (u, topology_next, &list);
3591 g_value_unset (&list);
3592 g_value_unset (&item);
3595 /* Get caps between all elements in this chain */
3596 l = (chain->elements && chain->elements->next) ? chain->elements : NULL;
3597 for (; l && l->next; l = l->next) {
3598 GstDecodeElement *delem, *delem_next;
3599 GstElement *elem, *elem_next;
3604 elem = delem->element;
3605 delem_next = l->next->data;
3606 elem_next = delem_next->element;
3609 caps = _gst_element_get_linked_caps (elem_next, elem, &srcpad);
3612 s = gst_structure_new_id_empty (topology_structure_name);
3613 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL);
3614 gst_caps_unref (caps);
3616 gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL);
3617 gst_structure_free (u);
3622 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, srcpad,
3624 gst_object_unref (srcpad);
3628 /* Caps that resulted in this chain */
3629 caps = gst_pad_get_current_caps (chain->pad);
3631 caps = get_pad_caps (chain->pad);
3632 if (G_UNLIKELY (!gst_caps_is_fixed (caps))) {
3633 GST_ERROR_OBJECT (chain->pad,
3634 "Couldn't get fixed caps, got %" GST_PTR_FORMAT, caps);
3635 gst_caps_unref (caps);
3639 gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL);
3640 gst_structure_id_set (u, topology_element_srcpad, GST_TYPE_PAD, chain->pad,
3642 gst_caps_unref (caps);
3648 gst_decode_bin_post_topology_message (GstDecodeBin * dbin)
3653 s = gst_decode_chain_get_topology (dbin->decode_chain);
3655 msg = gst_message_new_element (GST_OBJECT (dbin), s);
3656 gst_element_post_message (GST_ELEMENT (dbin), msg);
3659 /* Must only be called if the toplevel chain is complete and blocked! */
3660 /* Not MT-safe, call with decodebin expose lock! */
3662 gst_decode_bin_expose (GstDecodeBin * dbin)
3664 GList *tmp, *endpads = NULL;
3665 gboolean missing_plugin = FALSE;
3666 gboolean already_exposed = TRUE;
3668 GST_DEBUG_OBJECT (dbin, "Exposing currently active chains/groups");
3670 /* Don't expose if we're currently shutting down */
3672 if (G_UNLIKELY (dbin->shutdown == TRUE)) {
3673 GST_WARNING_OBJECT (dbin, "Currently, shutting down, aborting exposing");
3679 /* Get the pads that we're going to expose and mark things as exposed */
3680 if (!gst_decode_chain_expose (dbin->decode_chain, &endpads, &missing_plugin)) {
3681 g_list_foreach (endpads, (GFunc) gst_object_unref, NULL);
3682 g_list_free (endpads);
3683 GST_ERROR_OBJECT (dbin, "Broken chain/group tree");
3684 g_return_val_if_reached (FALSE);
3687 if (endpads == NULL) {
3688 if (missing_plugin) {
3689 GST_WARNING_OBJECT (dbin, "No suitable plugins found");
3690 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL),
3691 ("no suitable plugins found"));
3693 /* in this case, the stream ended without buffers,
3694 * just post a warning */
3695 GST_WARNING_OBJECT (dbin, "All streams finished without buffers");
3696 GST_ELEMENT_ERROR (dbin, STREAM, FAILED, (NULL),
3697 ("all streams without buffers"));
3702 /* Check if this was called when everything was exposed already */
3703 for (tmp = endpads; tmp && already_exposed; tmp = tmp->next) {
3704 GstDecodePad *dpad = tmp->data;
3706 already_exposed &= dpad->exposed;
3707 if (!already_exposed)
3710 if (already_exposed) {
3711 GST_DEBUG_OBJECT (dbin, "Everything was exposed already!");
3712 g_list_foreach (endpads, (GFunc) gst_object_unref, NULL);
3713 g_list_free (endpads);
3717 /* Set all already exposed pads to blocked */
3718 for (tmp = endpads; tmp; tmp = tmp->next) {
3719 GstDecodePad *dpad = tmp->data;
3721 if (dpad->exposed) {
3722 GST_DEBUG_OBJECT (dpad, "blocking exposed pad");
3723 gst_decode_pad_set_blocked (dpad, TRUE);
3727 /* re-order pads : video, then audio, then others */
3728 endpads = g_list_sort (endpads, (GCompareFunc) sort_end_pads);
3731 for (tmp = endpads; tmp; tmp = tmp->next) {
3732 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
3735 /* 1. rewrite name */
3736 padname = g_strdup_printf ("src_%u", dbin->nbpads);
3738 GST_DEBUG_OBJECT (dbin, "About to expose dpad %s as %s",
3739 GST_OBJECT_NAME (dpad), padname);
3740 gst_object_set_name (GST_OBJECT (dpad), padname);
3743 /* 2. activate and add */
3745 && !gst_element_add_pad (GST_ELEMENT (dbin), GST_PAD_CAST (dpad))) {
3746 /* not really fatal, we can try to add the other pads */
3747 g_warning ("error adding pad to decodebin");
3750 dpad->exposed = TRUE;
3752 /* 3. emit signal */
3753 GST_INFO_OBJECT (dpad, "added new decoded pad");
3756 /* 4. Signal no-more-pads. This allows the application to hook stuff to the
3758 GST_LOG_OBJECT (dbin, "signaling no-more-pads");
3759 gst_element_no_more_pads (GST_ELEMENT (dbin));
3761 /* 5. Send a custom element message with the stream topology */
3762 if (dbin->post_stream_topology)
3763 gst_decode_bin_post_topology_message (dbin);
3765 /* 6. Unblock internal pads. The application should have connected stuff now
3766 * so that streaming can continue. */
3767 for (tmp = endpads; tmp; tmp = tmp->next) {
3768 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
3770 GST_DEBUG_OBJECT (dpad, "unblocking");
3771 gst_decode_pad_unblock (dpad);
3772 GST_DEBUG_OBJECT (dpad, "unblocked");
3773 gst_object_unref (dpad);
3775 g_list_free (endpads);
3777 do_async_done (dbin);
3778 GST_DEBUG_OBJECT (dbin, "Exposed everything");
3782 /* gst_decode_chain_expose:
3784 * Check if the chain can be exposed and add all endpads
3785 * to the endpads list.
3787 * Also update the active group's multiqueue to the
3790 * Not MT-safe, call with decodebin expose lock! *
3793 gst_decode_chain_expose (GstDecodeChain * chain, GList ** endpads,
3794 gboolean * missing_plugin)
3796 GstDecodeGroup *group;
3800 if (chain->deadend) {
3802 *missing_plugin = TRUE;
3806 if (chain->endpad) {
3807 if (!chain->endpad->blocked && !chain->endpad->exposed)
3809 *endpads = g_list_prepend (*endpads, gst_object_ref (chain->endpad));
3813 group = chain->active_group;
3816 if (!group->no_more_pads && !group->overrun)
3821 /* configure queues for playback */
3822 decodebin_set_queue_size (dbin, group->multiqueue, FALSE, TRUE);
3824 /* we can now disconnect any overrun signal, which is used to expose the
3826 if (group->overrunsig) {
3827 GST_LOG_OBJECT (dbin, "Disconnecting overrun");
3828 g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
3829 group->overrunsig = 0;
3832 for (l = group->children; l; l = l->next) {
3833 GstDecodeChain *childchain = l->data;
3835 if (!gst_decode_chain_expose (childchain, endpads, missing_plugin))
3842 /*************************
3843 * GstDecodePad functions
3844 *************************/
3847 gst_decode_pad_class_init (GstDecodePadClass * klass)
3852 gst_decode_pad_init (GstDecodePad * pad)
3855 pad->blocked = FALSE;
3856 pad->exposed = FALSE;
3857 pad->drained = FALSE;
3858 gst_object_ref_sink (pad);
3861 static GstPadProbeReturn
3862 source_pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
3864 GstDecodePad *dpad = user_data;
3865 GstDecodeChain *chain;
3868 if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) {
3869 GST_LOG_OBJECT (pad, "Seeing event '%s'",
3870 GST_EVENT_TYPE_NAME (GST_PAD_PROBE_INFO_EVENT (info)));
3871 if ((GST_EVENT_TYPE (GST_PAD_PROBE_INFO_EVENT (info)) != GST_EVENT_CAPS)
3872 && (GST_EVENT_IS_STICKY (GST_PAD_PROBE_INFO_EVENT (info))
3873 || !GST_EVENT_IS_SERIALIZED (GST_PAD_PROBE_INFO_EVENT (info)))) {
3874 /* do not block on sticky or out of band events otherwise the allocation query
3875 from demuxer might block the loop thread */
3876 GST_LOG_OBJECT (pad, "Letting event through");
3877 return GST_PAD_PROBE_PASS;
3880 chain = dpad->chain;
3883 GST_LOG_OBJECT (dpad, "blocked: dpad->chain:%p", chain);
3885 dpad->blocked = TRUE;
3888 if (gst_decode_chain_is_complete (dbin->decode_chain)) {
3889 if (!gst_decode_bin_expose (dbin))
3890 GST_WARNING_OBJECT (dbin, "Couldn't expose group");
3892 EXPOSE_UNLOCK (dbin);
3894 /* If we unblocked due to a caps event, let it go through */
3895 if ((GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) &&
3896 (GST_EVENT_TYPE (GST_PAD_PROBE_INFO_EVENT (info)) == GST_EVENT_CAPS))
3897 return GST_PAD_PROBE_PASS;
3899 return GST_PAD_PROBE_OK;
3902 static GstPadProbeReturn
3903 source_pad_event_probe (GstPad * pad, GstPadProbeInfo * info,
3906 GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
3907 GstDecodePad *dpad = user_data;
3908 gboolean res = TRUE;
3910 GST_LOG_OBJECT (pad, "%s dpad:%p", GST_EVENT_TYPE_NAME (event), dpad);
3912 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
3913 GST_DEBUG_OBJECT (pad, "we received EOS");
3915 /* Check if all pads are drained.
3916 * * If there is no next group, we will let the EOS go through.
3917 * * If there is a next group but the current group isn't completely
3918 * drained, we will drop the EOS event.
3919 * * If there is a next group to expose and this was the last non-drained
3920 * pad for that group, we will remove the ghostpad of the current group
3921 * first, which unlinks the peer and so drops the EOS. */
3922 res = gst_decode_pad_handle_eos (dpad);
3925 return GST_PAD_PROBE_OK;
3927 return GST_PAD_PROBE_DROP;
3931 gst_decode_pad_set_blocked (GstDecodePad * dpad, gboolean blocked)
3933 GstDecodeBin *dbin = dpad->dbin;
3938 GST_DEBUG_OBJECT (dpad, "blocking pad: %d", blocked);
3940 opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad));
3944 /* do not block if shutting down.
3945 * we do not consider/expect it blocked further below, but use other trick */
3946 if (!blocked || !dbin->shutdown) {
3948 if (dpad->block_id == 0)
3950 gst_pad_add_probe (opad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
3951 source_pad_blocked_cb, gst_object_ref (dpad),
3952 (GDestroyNotify) gst_object_unref);
3954 if (dpad->block_id != 0) {
3955 gst_pad_remove_probe (opad, dpad->block_id);
3958 dpad->blocked = FALSE;
3963 if (dbin->shutdown) {
3964 /* deactivate to force flushing state to prevent NOT_LINKED errors */
3965 gst_pad_set_active (GST_PAD_CAST (dpad), FALSE);
3966 /* note that deactivating the target pad would have no effect here,
3967 * since elements are typically connected first (and pads exposed),
3968 * and only then brought to PAUSED state (so pads activated) */
3970 gst_object_ref (dpad);
3971 dbin->blocked_pads = g_list_prepend (dbin->blocked_pads, dpad);
3976 if ((l = g_list_find (dbin->blocked_pads, dpad))) {
3977 gst_object_unref (dpad);
3978 dbin->blocked_pads = g_list_delete_link (dbin->blocked_pads, l);
3981 gst_object_unref (opad);
3987 gst_decode_pad_add_drained_check (GstDecodePad * dpad)
3989 gst_pad_add_probe (GST_PAD_CAST (dpad), GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
3990 source_pad_event_probe, dpad, NULL);
3994 gst_decode_pad_activate (GstDecodePad * dpad, GstDecodeChain * chain)
3996 g_return_if_fail (chain != NULL);
3998 dpad->chain = chain;
3999 gst_pad_set_active (GST_PAD_CAST (dpad), TRUE);
4000 gst_decode_pad_set_blocked (dpad, TRUE);
4001 gst_decode_pad_add_drained_check (dpad);
4005 gst_decode_pad_unblock (GstDecodePad * dpad)
4007 gst_decode_pad_set_blocked (dpad, FALSE);
4010 /*gst_decode_pad_new:
4012 * Creates a new GstDecodePad for the given pad.
4014 static GstDecodePad *
4015 gst_decode_pad_new (GstDecodeBin * dbin, GstPad * pad, GstDecodeChain * chain)
4018 GstPadTemplate *pad_tmpl;
4020 GST_DEBUG_OBJECT (dbin, "making new decodepad");
4021 pad_tmpl = gst_static_pad_template_get (&decoder_bin_src_template);
4023 g_object_new (GST_TYPE_DECODE_PAD, "direction", GST_PAD_DIRECTION (pad),
4024 "template", pad_tmpl, NULL);
4025 gst_ghost_pad_construct (GST_GHOST_PAD_CAST (dpad));
4026 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad);
4027 dpad->chain = chain;
4029 gst_object_unref (pad_tmpl);
4035 gst_pending_pad_free (GstPendingPad * ppad)
4038 g_assert (ppad->pad);
4040 if (ppad->event_probe_id != 0)
4041 gst_pad_remove_probe (ppad->pad, ppad->event_probe_id);
4042 gst_object_unref (ppad->pad);
4043 g_slice_free (GstPendingPad, ppad);
4047 * Element add/remove
4051 do_async_start (GstDecodeBin * dbin)
4053 GstMessage *message;
4055 dbin->async_pending = TRUE;
4057 message = gst_message_new_async_start (GST_OBJECT_CAST (dbin));
4058 parent_class->handle_message (GST_BIN_CAST (dbin), message);
4062 do_async_done (GstDecodeBin * dbin)
4064 GstMessage *message;
4066 if (dbin->async_pending) {
4068 gst_message_new_async_done (GST_OBJECT_CAST (dbin),
4069 GST_CLOCK_TIME_NONE);
4070 parent_class->handle_message (GST_BIN_CAST (dbin), message);
4072 dbin->async_pending = FALSE;
4077 * convenience functions
4082 * Returns the first sink pad of the given element, or NULL if it doesn't have
4087 find_sink_pad (GstElement * element)
4091 GValue item = { 0, };
4093 it = gst_element_iterate_sink_pads (element);
4095 if ((gst_iterator_next (it, &item)) == GST_ITERATOR_OK)
4096 pad = g_value_dup_object (&item);
4097 g_value_unset (&item);
4098 gst_iterator_free (it);
4103 /* call with dyn_lock held */
4105 unblock_pads (GstDecodeBin * dbin)
4109 GST_LOG_OBJECT (dbin, "unblocking pads");
4111 for (tmp = dbin->blocked_pads; tmp; tmp = tmp->next) {
4112 GstDecodePad *dpad = (GstDecodePad *) tmp->data;
4115 opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad));
4119 GST_DEBUG_OBJECT (dpad, "unblocking");
4120 if (dpad->block_id != 0) {
4121 gst_pad_remove_probe (opad, dpad->block_id);
4124 dpad->blocked = FALSE;
4125 /* make flushing, prevent NOT_LINKED */
4126 GST_PAD_SET_FLUSHING (GST_PAD_CAST (dpad));
4127 gst_object_unref (dpad);
4128 gst_object_unref (opad);
4129 GST_DEBUG_OBJECT (dpad, "unblocked");
4132 /* clear, no more blocked pads */
4133 g_list_free (dbin->blocked_pads);
4134 dbin->blocked_pads = NULL;
4137 static GstStateChangeReturn
4138 gst_decode_bin_change_state (GstElement * element, GstStateChange transition)
4140 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
4141 GstDecodeBin *dbin = GST_DECODE_BIN (element);
4143 switch (transition) {
4144 case GST_STATE_CHANGE_NULL_TO_READY:
4145 if (dbin->typefind == NULL)
4146 goto missing_typefind;
4148 case GST_STATE_CHANGE_READY_TO_PAUSED:
4149 /* Make sure we've cleared all existing chains */
4150 if (dbin->decode_chain) {
4151 gst_decode_chain_free (dbin->decode_chain);
4152 dbin->decode_chain = NULL;
4155 GST_LOG_OBJECT (dbin, "clearing shutdown flag");
4156 dbin->shutdown = FALSE;
4158 dbin->have_type = FALSE;
4159 ret = GST_STATE_CHANGE_ASYNC;
4160 do_async_start (dbin);
4162 case GST_STATE_CHANGE_PAUSED_TO_READY:
4164 GST_LOG_OBJECT (dbin, "setting shutdown flag");
4165 dbin->shutdown = TRUE;
4166 unblock_pads (dbin);
4173 GstStateChangeReturn bret;
4175 bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4176 if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
4177 goto activate_failed;
4178 else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
4179 do_async_done (dbin);
4183 switch (transition) {
4184 case GST_STATE_CHANGE_PAUSED_TO_READY:
4185 do_async_done (dbin);
4186 if (dbin->decode_chain) {
4187 gst_decode_chain_free (dbin->decode_chain);
4188 dbin->decode_chain = NULL;
4191 case GST_STATE_CHANGE_READY_TO_NULL:
4201 gst_element_post_message (element,
4202 gst_missing_element_message_new (element, "typefind"));
4203 GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no typefind!"));
4204 return GST_STATE_CHANGE_FAILURE;
4208 GST_DEBUG_OBJECT (element,
4209 "element failed to change states -- activation problem?");
4210 return GST_STATE_CHANGE_FAILURE;
4215 gst_decode_bin_handle_message (GstBin * bin, GstMessage * msg)
4217 GstDecodeBin *dbin = GST_DECODE_BIN (bin);
4218 gboolean drop = FALSE;
4220 if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR) {
4221 GST_OBJECT_LOCK (dbin);
4222 drop = (g_list_find (dbin->filtered, GST_MESSAGE_SRC (msg)) != NULL);
4223 GST_OBJECT_UNLOCK (dbin);
4227 gst_message_unref (msg);
4229 GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
4233 gst_decode_bin_plugin_init (GstPlugin * plugin)
4235 GST_DEBUG_CATEGORY_INIT (gst_decode_bin_debug, "decodebin", 0, "decoder bin");
4237 /* Register some quarks here for the stream topology message */
4238 topology_structure_name = g_quark_from_static_string ("stream-topology");
4239 topology_caps = g_quark_from_static_string ("caps");
4240 topology_next = g_quark_from_static_string ("next");
4241 topology_pad = g_quark_from_static_string ("pad");
4242 topology_element_srcpad = g_quark_from_static_string ("element-srcpad");
4244 return gst_element_register (plugin, "decodebin", GST_RANK_NONE,
4245 GST_TYPE_DECODE_BIN);