/* GStreamer * Copyright (C) <2006> Edward Hervey * Copyright (C) <2009> Sebastian Dröge * Copyright (C) <2011> Hewlett-Packard Development Company, L.P. * Author: Sebastian Dröge , Collabora Ltd. * Copyright (C) <2013> Collabora Ltd. * Author: Sebastian Dröge * Copyright (C) <2015-2016> Centricular Ltd * @author: Edward Hervey * @author: Jan Schmidt * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-parsebin * * #GstBin that auto-magically constructs a parsing pipeline * using available parsers and demuxers via auto-plugging. * * parsebin unpacks the contents of the input stream to the * level of parsed elementary streams, but unlike decodebin * it doesn't connect decoder elements. The output pads * produce packetised encoded data with timestamps where possible, * or send missing-element messages where not. * * parsebin is still experimental API and a technology preview. * Its behaviour and exposed API is subject to change. */ /* Implementation notes: * * The following section describes how ParseBin works internally. * * The first part of ParseBin is its typefind element, which tries * to determine the media type of the input stream. If the type is found * autoplugging starts. * * ParseBin internally organizes the elements it autoplugged into * GstParseChains and GstParseGroups. A parse chain is a single chain * of parsing, this * means that if ParseBin ever autoplugs an element with two+ srcpads * (e.g. a demuxer) this will end the chain and everything following this * demuxer will be put into parse groups below the chain. Otherwise, * if an element has a single srcpad that outputs raw data the parse chain * is ended too and a GstParsePad is stored and blocked. * * A parse group combines a number of chains that are created by a * demuxer element. * * This continues until the top-level parse chain is complete. A parse * chain is complete if it either ends with a blocked elementary stream, * if autoplugging stopped because no suitable plugins could be found * or if the active group is complete. A parse group on the other hand * is complete if all child chains are complete. * * If this happens at some point, all end pads of all active groups are exposed. * For this ParseBin adds the end pads, and then unblocks them. Now playback starts. * * If one of the chains that end on a endpad receives EOS ParseBin checks * if all chains and groups are drained. In that case everything goes into EOS. * If there is a chain where the active group is drained but there exist next * groups, the active group is hidden (endpads are removed) and the next group * is exposed. This means that in some cases more pads may be created even * after the initial no-more-pads signal. This happens for example with * so-called "chained oggs", most commonly found among ogg/vorbis internet * radio streams. * * Note 1: If we're talking about blocked endpads this really means that the * *target* pads of the endpads are blocked. Pads that are exposed to the outside * should never ever be blocked! * * Note 2: If a group is complete and the parent's chain demuxer adds new pads * but never signaled no-more-pads this additional pads will be ignored! * */ /* FIXME 0.11: suppress warnings for deprecated API such as GValueArray * with newer GLib versions (>= 2.31.0) */ #define GLIB_DISABLE_DEPRECATION_WARNINGS #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "gstplay-enum.h" #include "gstplayback.h" #include "gstplaybackutils.h" /* generic templates */ static GstStaticPadTemplate parse_bin_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate parse_bin_src_template = GST_STATIC_PAD_TEMPLATE ("src_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (gst_parse_bin_debug); #define GST_CAT_DEFAULT gst_parse_bin_debug typedef struct _GstPendingPad GstPendingPad; typedef struct _GstParseElement GstParseElement; typedef struct _GstParseChain GstParseChain; typedef struct _GstParseGroup GstParseGroup; typedef struct _GstParsePad GstParsePad; typedef GstGhostPadClass GstParsePadClass; typedef struct _GstParseBin GstParseBin; typedef struct _GstParseBinClass GstParseBinClass; #define GST_TYPE_PARSE_BIN (gst_parse_bin_get_type()) #define GST_PARSE_BIN_CAST(obj) ((GstParseBin*)(obj)) #define GST_PARSE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PARSE_BIN,GstParseBin)) #define GST_PARSE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PARSE_BIN,GstParseBinClass)) #define GST_IS_parse_bin(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PARSE_BIN)) #define GST_IS_parse_bin_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PARSE_BIN)) /** * GstParseBin: * * The opaque #GstParseBin data structure */ struct _GstParseBin { GstBin bin; /* we extend GstBin */ /* properties */ gchar *encoding; /* encoding of subtitles */ guint64 connection_speed; GstElement *typefind; /* this holds the typefind object */ GMutex expose_lock; /* Protects exposal and removal of groups */ GstParseChain *parse_chain; /* Top level parse chain */ guint nbpads; /* unique identifier for source pads */ GMutex factories_lock; guint32 factories_cookie; /* Cookie from last time when factories was updated */ GList *factories; /* factories we can use for selecting elements */ GMutex subtitle_lock; /* Protects changes to subtitles and encoding */ GList *subtitles; /* List of elements with subtitle-encoding, * protected by above mutex! */ gboolean have_type; /* if we received the have_type signal */ guint have_type_id; /* signal id for have-type from typefind */ gboolean async_pending; /* async-start has been emitted */ GMutex dyn_lock; /* lock protecting pad blocking */ gboolean shutdown; /* if we are shutting down */ GList *blocked_pads; /* pads that have set to block */ gboolean expose_allstreams; /* Whether to expose unknow type streams or not */ GList *filtered; /* elements for which error messages are filtered */ GList *filtered_errors; /* filtered error messages */ }; struct _GstParseBinClass { GstBinClass parent_class; /* signal fired when we found a pad that we cannot parse */ void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps); /* signal fired to know if we continue trying to parse the given caps */ gboolean (*autoplug_continue) (GstElement * element, GstPad * pad, GstCaps * caps); /* signal fired to get a list of factories to try to autoplug */ GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad, GstCaps * caps); /* signal fired to sort the factories */ GValueArray *(*autoplug_sort) (GstElement * element, GstPad * pad, GstCaps * caps, GValueArray * factories); /* signal fired to select from the proposed list of factories */ GstAutoplugSelectResult (*autoplug_select) (GstElement * element, GstPad * pad, GstCaps * caps, GstElementFactory * factory); /* signal fired when a autoplugged element that is not linked downstream * or exposed wants to query something */ gboolean (*autoplug_query) (GstElement * element, GstPad * pad, GstQuery * query); /* fired when the last group is drained */ void (*drained) (GstElement * element); }; /* signals */ enum { SIGNAL_UNKNOWN_TYPE, SIGNAL_AUTOPLUG_CONTINUE, SIGNAL_AUTOPLUG_FACTORIES, SIGNAL_AUTOPLUG_SELECT, SIGNAL_AUTOPLUG_SORT, SIGNAL_AUTOPLUG_QUERY, SIGNAL_DRAINED, LAST_SIGNAL }; #define DEFAULT_SUBTITLE_ENCODING NULL #define DEFAULT_USE_BUFFERING FALSE #define DEFAULT_LOW_PERCENT 10 #define DEFAULT_HIGH_PERCENT 99 /* by default we use the automatic values above */ #define DEFAULT_EXPOSE_ALL_STREAMS TRUE #define DEFAULT_CONNECTION_SPEED 0 /* Properties */ enum { PROP_0, PROP_SUBTITLE_ENCODING, PROP_SINK_CAPS, PROP_EXPOSE_ALL_STREAMS, PROP_CONNECTION_SPEED }; static GstBinClass *parent_class; static guint gst_parse_bin_signals[LAST_SIGNAL] = { 0 }; static void do_async_start (GstParseBin * parsebin); static void do_async_done (GstParseBin * parsebin); static void type_found (GstElement * typefind, guint probability, GstCaps * caps, GstParseBin * parse_bin); static gboolean gst_parse_bin_autoplug_continue (GstElement * element, GstPad * pad, GstCaps * caps); static GValueArray *gst_parse_bin_autoplug_factories (GstElement * element, GstPad * pad, GstCaps * caps); static GValueArray *gst_parse_bin_autoplug_sort (GstElement * element, GstPad * pad, GstCaps * caps, GValueArray * factories); static GstAutoplugSelectResult gst_parse_bin_autoplug_select (GstElement * element, GstPad * pad, GstCaps * caps, GstElementFactory * factory); static gboolean gst_parse_bin_autoplug_query (GstElement * element, GstPad * pad, GstQuery * query); static void gst_parse_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_parse_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void caps_notify_cb (GstPad * pad, GParamSpec * unused, GstParseChain * chain); static GstStateChangeReturn gst_parse_bin_change_state (GstElement * element, GstStateChange transition); static void gst_parse_bin_handle_message (GstBin * bin, GstMessage * message); static void gst_parse_pad_update_caps (GstParsePad * parsepad, GstCaps * caps); static void gst_parse_pad_update_tags (GstParsePad * parsepad, GstTagList * tags); static GstEvent *gst_parse_pad_stream_start_event (GstParsePad * parsepad, GstEvent * event); static void gst_parse_pad_update_stream_collection (GstParsePad * parsepad, GstStreamCollection * collection); static GstCaps *get_pad_caps (GstPad * pad); #define EXPOSE_LOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "expose locking from thread %p", \ g_thread_self ()); \ g_mutex_lock (&GST_PARSE_BIN_CAST(parsebin)->expose_lock); \ GST_LOG_OBJECT (parsebin, \ "expose locked from thread %p", \ g_thread_self ()); \ } G_STMT_END #define EXPOSE_UNLOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "expose unlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (&GST_PARSE_BIN_CAST(parsebin)->expose_lock); \ } G_STMT_END #define DYN_LOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "dynlocking from thread %p", \ g_thread_self ()); \ g_mutex_lock (&GST_PARSE_BIN_CAST(parsebin)->dyn_lock); \ GST_LOG_OBJECT (parsebin, \ "dynlocked from thread %p", \ g_thread_self ()); \ } G_STMT_END #define DYN_UNLOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "dynunlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (&GST_PARSE_BIN_CAST(parsebin)->dyn_lock); \ } G_STMT_END #define SUBTITLE_LOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "subtitle locking from thread %p", \ g_thread_self ()); \ g_mutex_lock (&GST_PARSE_BIN_CAST(parsebin)->subtitle_lock); \ GST_LOG_OBJECT (parsebin, \ "subtitle lock from thread %p", \ g_thread_self ()); \ } G_STMT_END #define SUBTITLE_UNLOCK(parsebin) G_STMT_START { \ GST_LOG_OBJECT (parsebin, \ "subtitle unlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (&GST_PARSE_BIN_CAST(parsebin)->subtitle_lock); \ } G_STMT_END struct _GstPendingPad { GstPad *pad; GstParseChain *chain; gulong event_probe_id; gulong notify_caps_id; }; struct _GstParseElement { GstElement *element; GstElement *capsfilter; /* Optional capsfilter for Parser/Convert */ gulong pad_added_id; gulong pad_removed_id; gulong no_more_pads_id; }; /* GstParseGroup * * Streams belonging to the same group/chain of a media file * * When changing something here lock the parent chain! */ struct _GstParseGroup { GstParseBin *parsebin; GstParseChain *parent; gboolean no_more_pads; /* TRUE if the demuxer signaled no-more-pads */ gboolean drained; /* TRUE if the all children are drained */ GList *children; /* List of GstParseChains in this group */ }; struct _GstParseChain { GstParseGroup *parent; GstParseBin *parsebin; GMutex lock; /* Protects this chain and its groups */ GstPad *pad; /* srcpad that caused creation of this chain */ GstCaps *start_caps; /* The initial caps of this chain */ gboolean drained; /* TRUE if the all children are drained */ gboolean demuxer; /* TRUE if elements->data is a demuxer */ gboolean parsed; /* TRUE if any elements are a parser */ GList *elements; /* All elements in this group, first is the latest and most downstream element */ /* Note: there are only groups if the last element of this chain * is a demuxer, otherwise the chain will end with an endpad. * The other way around this means, that endpad only exists if this * chain doesn't end with a demuxer! */ GstParseGroup *active_group; /* Currently active group */ GList *next_groups; /* head is newest group, tail is next group. a new group will be created only if the head group had no-more-pads. If it's only exposed all new pads will be ignored! */ GList *pending_pads; /* Pads that have no fixed caps yet */ GstParsePad *current_pad; /* Current ending pad of the chain that can't * be exposed yet but would be the same as endpad * once it can be exposed */ GstParsePad *endpad; /* Pad of this chain that could be exposed */ gboolean deadend; /* This chain is incomplete and can't be completed, e.g. no suitable parser could be found e.g. stream got EOS without buffers */ gchar *deadend_details; GstCaps *endcaps; /* Caps that were used when linking to the endpad or that resulted in the deadend */ /* FIXME: This should be done directly via a thread! */ GList *old_groups; /* Groups that should be freed later */ }; static void gst_parse_chain_free (GstParseChain * chain); static GstParseChain *gst_parse_chain_new (GstParseBin * parsebin, GstParseGroup * group, GstPad * pad, GstCaps * start_caps); static void gst_parse_group_hide (GstParseGroup * group); static void gst_parse_group_free (GstParseGroup * group); static GstParseGroup *gst_parse_group_new (GstParseBin * parsebin, GstParseChain * chain); static gboolean gst_parse_chain_is_complete (GstParseChain * chain); static gboolean gst_parse_chain_expose (GstParseChain * chain, GList ** endpads, gboolean * missing_plugin, GString * missing_plugin_details, gboolean * last_group, gboolean * uncollected_streams); static void build_fallback_collection (GstParseChain * chain, GstStreamCollection * collection); static gboolean gst_parse_chain_is_drained (GstParseChain * chain); static gboolean gst_parse_group_is_complete (GstParseGroup * group); static gboolean gst_parse_group_is_drained (GstParseGroup * group); static gboolean gst_parse_bin_expose (GstParseBin * parsebin); #define CHAIN_MUTEX_LOCK(chain) G_STMT_START { \ GST_LOG_OBJECT (chain->parsebin, \ "locking chain %p from thread %p", \ chain, g_thread_self ()); \ g_mutex_lock (&chain->lock); \ GST_LOG_OBJECT (chain->parsebin, \ "locked chain %p from thread %p", \ chain, g_thread_self ()); \ } G_STMT_END #define CHAIN_MUTEX_UNLOCK(chain) G_STMT_START { \ GST_LOG_OBJECT (chain->parsebin, \ "unlocking chain %p from thread %p", \ chain, g_thread_self ()); \ g_mutex_unlock (&chain->lock); \ } G_STMT_END /* GstParsePad * * GstPad private used for source pads of chains */ struct _GstParsePad { GstGhostPad parent; GstParseBin *parsebin; GstParseChain *chain; gboolean blocked; /* the *target* pad is blocked */ gboolean exposed; /* the pad is exposed */ gboolean drained; /* an EOS has been seen on the pad */ gulong block_id; gboolean in_a_fallback_collection; GstStreamCollection *active_collection; GstStream *active_stream; }; GType gst_parse_pad_get_type (void); G_DEFINE_TYPE (GstParsePad, gst_parse_pad, GST_TYPE_GHOST_PAD); #define GST_TYPE_PARSE_PAD (gst_parse_pad_get_type ()) #define GST_PARSE_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PARSE_PAD,GstParsePad)) static GstParsePad *gst_parse_pad_new (GstParseBin * parsebin, GstParseChain * chain); static void gst_parse_pad_activate (GstParsePad * parsepad, GstParseChain * chain); static void gst_parse_pad_unblock (GstParsePad * parsepad); static void gst_parse_pad_set_blocked (GstParsePad * parsepad, gboolean blocked); static gboolean gst_parse_pad_query (GstPad * pad, GstObject * parent, GstQuery * query); static GstPadProbeReturn gst_parse_pad_event (GstPad * pad, GstPadProbeInfo * info, gpointer user_data); static void gst_pending_pad_free (GstPendingPad * ppad); static GstPadProbeReturn pad_event_cb (GstPad * pad, GstPadProbeInfo * info, gpointer data); /******************************** * Standard GObject boilerplate * ********************************/ static void gst_parse_bin_class_init (GstParseBinClass * klass); static void gst_parse_bin_init (GstParseBin * parse_bin); static void gst_parse_bin_dispose (GObject * object); static void gst_parse_bin_finalize (GObject * object); static GType gst_parse_bin_get_type (void) { static GType gst_parse_bin_type = 0; if (!gst_parse_bin_type) { static const GTypeInfo gst_parse_bin_info = { sizeof (GstParseBinClass), NULL, NULL, (GClassInitFunc) gst_parse_bin_class_init, NULL, NULL, sizeof (GstParseBin), 0, (GInstanceInitFunc) gst_parse_bin_init, NULL }; gst_parse_bin_type = g_type_register_static (GST_TYPE_BIN, "GstParseBin", &gst_parse_bin_info, 0); } return gst_parse_bin_type; } static gboolean _gst_boolean_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gboolean myboolean; myboolean = g_value_get_boolean (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boolean (return_accu, myboolean); /* stop emission if FALSE */ return myboolean; } static gboolean _gst_boolean_or_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gboolean myboolean; gboolean retboolean; myboolean = g_value_get_boolean (handler_return); retboolean = g_value_get_boolean (return_accu); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boolean (return_accu, myboolean || retboolean); return TRUE; } /* we collect the first result */ static gboolean _gst_array_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gpointer array; array = g_value_get_boxed (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boxed (return_accu, array); return FALSE; } static gboolean _gst_select_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { GstAutoplugSelectResult res; res = g_value_get_enum (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_enum (return_accu, res); /* Call the next handler in the chain (if any) when the current callback * returns TRY. This makes it possible to register separate autoplug-select * handlers that implement different TRY/EXPOSE/SKIP strategies. */ if (res == GST_AUTOPLUG_SELECT_TRY) return TRUE; return FALSE; } static gboolean _gst_array_hasvalue_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gpointer array; array = g_value_get_boxed (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boxed (return_accu, array); if (array != NULL) return FALSE; return TRUE; } static void gst_parse_bin_class_init (GstParseBinClass * klass) { GObjectClass *gobject_klass; GstElementClass *gstelement_klass; GstBinClass *gstbin_klass; gobject_klass = (GObjectClass *) klass; gstelement_klass = (GstElementClass *) klass; gstbin_klass = (GstBinClass *) klass; parent_class = g_type_class_peek_parent (klass); gobject_klass->dispose = gst_parse_bin_dispose; gobject_klass->finalize = gst_parse_bin_finalize; gobject_klass->set_property = gst_parse_bin_set_property; gobject_klass->get_property = gst_parse_bin_get_property; /** * GstParseBin::unknown-type: * @bin: The ParseBin. * @pad: The new pad containing caps that cannot be resolved to a 'final' * stream type. * @caps: The #GstCaps of the pad that cannot be resolved. * * This signal is emitted when a pad for which there is no further possible * parsing is added to the ParseBin. */ gst_parse_bin_signals[SIGNAL_UNKNOWN_TYPE] = g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, unknown_type), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstParseBin::autoplug-continue: * @bin: The ParseBin. * @pad: The #GstPad. * @caps: The #GstCaps found. * * This signal is emitted whenever ParseBin finds a new stream. It is * emitted before looking for any elements that can handle that stream. * * * Invocation of signal handlers stops after the first signal handler * returns #FALSE. Signal handlers are invoked in the order they were * connected in. * * * Returns: #TRUE if you wish ParseBin to look for elements that can * handle the given @caps. If #FALSE, those caps will be considered as * final and the pad will be exposed as such (see 'pad-added' signal of * #GstElement). */ gst_parse_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] = g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, autoplug_continue), _gst_boolean_accumulator, NULL, g_cclosure_marshal_generic, G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstParseBin::autoplug-factories: * @bin: The ParseBin. * @pad: The #GstPad. * @caps: The #GstCaps found. * * This function is emited when an array of possible factories for @caps on * @pad is needed. ParseBin will by default return an array with all * compatible factories, sorted by rank. * * If this function returns NULL, @pad will be exposed as a final caps. * * If this function returns an empty array, the pad will be considered as * having an unhandled type media type. * * * Only the signal handler that is connected first will ever by invoked. * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this * signal, they will never be invoked! * * * Returns: a #GValueArray* with a list of factories to try. The factories are * by default tried in the returned order or based on the index returned by * "autoplug-select". */ gst_parse_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] = g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, autoplug_factories), _gst_array_accumulator, NULL, g_cclosure_marshal_generic, G_TYPE_VALUE_ARRAY, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstParseBin::autoplug-sort: * @bin: The ParseBin. * @pad: The #GstPad. * @caps: The #GstCaps. * @factories: A #GValueArray of possible #GstElementFactory to use. * * Once ParseBin has found the possible #GstElementFactory objects to try * for @caps on @pad, this signal is emited. The purpose of the signal is for * the application to perform additional sorting or filtering on the element * factory array. * * The callee should copy and modify @factories or return #NULL if the * order should not change. * * * Invocation of signal handlers stops after one signal handler has * returned something else than #NULL. Signal handlers are invoked in * the order they were connected in. * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this * signal, they will never be invoked! * * * Returns: A new sorted array of #GstElementFactory objects. */ gst_parse_bin_signals[SIGNAL_AUTOPLUG_SORT] = g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, autoplug_sort), _gst_array_hasvalue_accumulator, NULL, g_cclosure_marshal_generic, G_TYPE_VALUE_ARRAY, 3, GST_TYPE_PAD, GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY | G_SIGNAL_TYPE_STATIC_SCOPE); /** * GstParseBin::autoplug-select: * @bin: The ParseBin. * @pad: The #GstPad. * @caps: The #GstCaps. * @factory: A #GstElementFactory to use. * * This signal is emitted once ParseBin has found all the possible * #GstElementFactory that can be used to handle the given @caps. For each of * those factories, this signal is emitted. * * The signal handler should return a #GST_TYPE_AUTOPLUG_SELECT_RESULT enum * value indicating what ParseBin should do next. * * A value of #GST_AUTOPLUG_SELECT_TRY will try to autoplug an element from * @factory. * * A value of #GST_AUTOPLUG_SELECT_EXPOSE will expose @pad without plugging * any element to it. * * A value of #GST_AUTOPLUG_SELECT_SKIP will skip @factory and move to the * next factory. * * * The signal handler will not be invoked if any of the previously * registered signal handlers (if any) return a value other than * GST_AUTOPLUG_SELECT_TRY. Which also means that if you return * GST_AUTOPLUG_SELECT_TRY from one signal handler, handlers that get * registered next (again, if any) can override that decision. * * * Returns: a #GST_TYPE_AUTOPLUG_SELECT_RESULT that indicates the required * operation. the default handler will always return * #GST_AUTOPLUG_SELECT_TRY. */ gst_parse_bin_signals[SIGNAL_AUTOPLUG_SELECT] = g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, autoplug_select), _gst_select_accumulator, NULL, g_cclosure_marshal_generic, GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS, GST_TYPE_ELEMENT_FACTORY); /** * GstParseBin::autoplug-query: * @bin: The ParseBin. * @child: The child element doing the query * @pad: The #GstPad. * @element: The #GstElement. * @query: The #GstQuery. * * This signal is emitted whenever an autoplugged element that is * not linked downstream yet and not exposed does a query. It can * be used to tell the element about the downstream supported caps * for example. * * Returns: #TRUE if the query was handled, #FALSE otherwise. */ gst_parse_bin_signals[SIGNAL_AUTOPLUG_QUERY] = g_signal_new ("autoplug-query", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, autoplug_query), _gst_boolean_or_accumulator, NULL, g_cclosure_marshal_generic, G_TYPE_BOOLEAN, 3, GST_TYPE_PAD, GST_TYPE_ELEMENT, GST_TYPE_QUERY | G_SIGNAL_TYPE_STATIC_SCOPE); /** * GstParseBin::drained * @bin: The ParseBin * * This signal is emitted once ParseBin has finished parsing all the data. */ gst_parse_bin_signals[SIGNAL_DRAINED] = g_signal_new ("drained", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstParseBinClass, drained), NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 0, G_TYPE_NONE); g_object_class_install_property (gobject_klass, PROP_SUBTITLE_ENCODING, g_param_spec_string ("subtitle-encoding", "subtitle encoding", "Encoding to assume if input subtitles are not in UTF-8 encoding. " "If not set, the GST_SUBTITLE_ENCODING environment variable will " "be checked for an encoding to use. If that is not set either, " "ISO-8859-15 will be assumed.", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_klass, PROP_SINK_CAPS, g_param_spec_boxed ("sink-caps", "Sink Caps", "The caps of the input data. (NULL = use typefind element)", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstParseBin::expose-all-streams * * Expose streams of unknown type. * * If set to %FALSE, then only the streams that can be parsed to the final * caps (see 'caps' property) will have a pad exposed. Streams that do not * match those caps but could have been parsed will not have parser plugged * in internally and will not have a pad exposed. */ g_object_class_install_property (gobject_klass, PROP_EXPOSE_ALL_STREAMS, g_param_spec_boolean ("expose-all-streams", "Expose All Streams", "Expose all streams, including those of unknown type or that don't match the 'caps' property", DEFAULT_EXPOSE_ALL_STREAMS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstParseBin2::connection-speed * * Network connection speed in kbps (0 = unknownw) */ g_object_class_install_property (gobject_klass, PROP_CONNECTION_SPEED, g_param_spec_uint64 ("connection-speed", "Connection Speed", "Network connection speed in kbps (0 = unknown)", 0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); klass->autoplug_continue = GST_DEBUG_FUNCPTR (gst_parse_bin_autoplug_continue); klass->autoplug_factories = GST_DEBUG_FUNCPTR (gst_parse_bin_autoplug_factories); klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_parse_bin_autoplug_sort); klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_parse_bin_autoplug_select); klass->autoplug_query = GST_DEBUG_FUNCPTR (gst_parse_bin_autoplug_query); gst_element_class_add_pad_template (gstelement_klass, gst_static_pad_template_get (&parse_bin_sink_template)); gst_element_class_add_pad_template (gstelement_klass, gst_static_pad_template_get (&parse_bin_src_template)); gst_element_class_set_static_metadata (gstelement_klass, "Parse Bin", "Generic/Bin/Parser", "Parse and de-multiplex to elementary stream", "Jan Schmidt , " "Edward Hervey "); gstelement_klass->change_state = GST_DEBUG_FUNCPTR (gst_parse_bin_change_state); gstbin_klass->handle_message = GST_DEBUG_FUNCPTR (gst_parse_bin_handle_message); g_type_class_ref (GST_TYPE_PARSE_PAD); } static void gst_parse_bin_update_factories_list (GstParseBin * parsebin) { guint cookie; cookie = gst_registry_get_feature_list_cookie (gst_registry_get ()); if (!parsebin->factories || parsebin->factories_cookie != cookie) { if (parsebin->factories) gst_plugin_feature_list_free (parsebin->factories); parsebin->factories = gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL); parsebin->factories = g_list_sort (parsebin->factories, gst_playback_utils_compare_factories_func); parsebin->factories_cookie = cookie; } } static void gst_parse_bin_init (GstParseBin * parse_bin) { /* first filter out the interesting element factories */ g_mutex_init (&parse_bin->factories_lock); /* we create the typefind element only once */ parse_bin->typefind = gst_element_factory_make ("typefind", "typefind"); if (!parse_bin->typefind) { g_warning ("can't find typefind element, ParseBin will not work"); } else { GstPad *pad; GstPad *gpad; GstPadTemplate *pad_tmpl; /* add the typefind element */ if (!gst_bin_add (GST_BIN (parse_bin), parse_bin->typefind)) { g_warning ("Could not add typefind element, ParseBin will not work"); gst_object_unref (parse_bin->typefind); parse_bin->typefind = NULL; } /* get the sinkpad */ pad = gst_element_get_static_pad (parse_bin->typefind, "sink"); /* get the pad template */ pad_tmpl = gst_static_pad_template_get (&parse_bin_sink_template); /* ghost the sink pad to ourself */ gpad = gst_ghost_pad_new_from_template ("sink", pad, pad_tmpl); gst_pad_set_active (gpad, TRUE); gst_element_add_pad (GST_ELEMENT (parse_bin), gpad); gst_object_unref (pad_tmpl); gst_object_unref (pad); } g_mutex_init (&parse_bin->expose_lock); parse_bin->parse_chain = NULL; g_mutex_init (&parse_bin->dyn_lock); parse_bin->shutdown = FALSE; parse_bin->blocked_pads = NULL; g_mutex_init (&parse_bin->subtitle_lock); parse_bin->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING); parse_bin->expose_allstreams = DEFAULT_EXPOSE_ALL_STREAMS; parse_bin->connection_speed = DEFAULT_CONNECTION_SPEED; GST_OBJECT_FLAG_SET (parse_bin, GST_BIN_FLAG_STREAMS_AWARE); } static void gst_parse_bin_dispose (GObject * object) { GstParseBin *parse_bin; parse_bin = GST_PARSE_BIN (object); if (parse_bin->factories) gst_plugin_feature_list_free (parse_bin->factories); parse_bin->factories = NULL; if (parse_bin->parse_chain) gst_parse_chain_free (parse_bin->parse_chain); parse_bin->parse_chain = NULL; g_free (parse_bin->encoding); parse_bin->encoding = NULL; g_list_free (parse_bin->subtitles); parse_bin->subtitles = NULL; G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_parse_bin_finalize (GObject * object) { GstParseBin *parse_bin; parse_bin = GST_PARSE_BIN (object); g_mutex_clear (&parse_bin->expose_lock); g_mutex_clear (&parse_bin->dyn_lock); g_mutex_clear (&parse_bin->subtitle_lock); g_mutex_clear (&parse_bin->factories_lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_parse_bin_set_sink_caps (GstParseBin * parsebin, GstCaps * caps) { GST_DEBUG_OBJECT (parsebin, "Setting new caps: %" GST_PTR_FORMAT, caps); g_object_set (parsebin->typefind, "force-caps", caps, NULL); } static GstCaps * gst_parse_bin_get_sink_caps (GstParseBin * parsebin) { GstCaps *caps; GST_DEBUG_OBJECT (parsebin, "Getting currently set caps"); g_object_get (parsebin->typefind, "force-caps", &caps, NULL); return caps; } static void gst_parse_bin_set_subs_encoding (GstParseBin * parsebin, const gchar * encoding) { GList *walk; GST_DEBUG_OBJECT (parsebin, "Setting new encoding: %s", GST_STR_NULL (encoding)); SUBTITLE_LOCK (parsebin); g_free (parsebin->encoding); parsebin->encoding = g_strdup (encoding); /* set the subtitle encoding on all added elements */ for (walk = parsebin->subtitles; walk; walk = g_list_next (walk)) { g_object_set (G_OBJECT (walk->data), "subtitle-encoding", parsebin->encoding, NULL); } SUBTITLE_UNLOCK (parsebin); } static gchar * gst_parse_bin_get_subs_encoding (GstParseBin * parsebin) { gchar *encoding; GST_DEBUG_OBJECT (parsebin, "Getting currently set encoding"); SUBTITLE_LOCK (parsebin); encoding = g_strdup (parsebin->encoding); SUBTITLE_UNLOCK (parsebin); return encoding; } static void gst_parse_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstParseBin *parsebin; parsebin = GST_PARSE_BIN (object); switch (prop_id) { case PROP_SUBTITLE_ENCODING: gst_parse_bin_set_subs_encoding (parsebin, g_value_get_string (value)); break; case PROP_SINK_CAPS: gst_parse_bin_set_sink_caps (parsebin, g_value_get_boxed (value)); break; case PROP_EXPOSE_ALL_STREAMS: parsebin->expose_allstreams = g_value_get_boolean (value); break; case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (parsebin); parsebin->connection_speed = g_value_get_uint64 (value) * 1000; GST_OBJECT_UNLOCK (parsebin); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_parse_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstParseBin *parsebin; parsebin = GST_PARSE_BIN (object); switch (prop_id) { case PROP_SUBTITLE_ENCODING: g_value_take_string (value, gst_parse_bin_get_subs_encoding (parsebin)); break; case PROP_SINK_CAPS: g_value_take_boxed (value, gst_parse_bin_get_sink_caps (parsebin)); break; case PROP_EXPOSE_ALL_STREAMS: g_value_set_boolean (value, parsebin->expose_allstreams); break; case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (parsebin); g_value_set_uint64 (value, parsebin->connection_speed / 1000); GST_OBJECT_UNLOCK (parsebin); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /***** * Default autoplug signal handlers *****/ static gboolean gst_parse_bin_autoplug_continue (GstElement * element, GstPad * pad, GstCaps * caps) { GST_DEBUG_OBJECT (element, "autoplug-continue returns TRUE"); /* by default we always continue */ return TRUE; } static GValueArray * gst_parse_bin_autoplug_factories (GstElement * element, GstPad * pad, GstCaps * caps) { GList *list, *tmp; GValueArray *result; GstParseBin *parsebin = GST_PARSE_BIN_CAST (element); GST_DEBUG_OBJECT (element, "finding factories"); /* return all compatible factories for caps */ g_mutex_lock (&parsebin->factories_lock); gst_parse_bin_update_factories_list (parsebin); list = gst_element_factory_list_filter (parsebin->factories, caps, GST_PAD_SINK, gst_caps_is_fixed (caps)); g_mutex_unlock (&parsebin->factories_lock); result = g_value_array_new (g_list_length (list)); for (tmp = list; tmp; tmp = tmp->next) { GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data); GValue val = { 0, }; g_value_init (&val, G_TYPE_OBJECT); g_value_set_object (&val, factory); g_value_array_append (result, &val); g_value_unset (&val); } gst_plugin_feature_list_free (list); GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result); return result; } static GValueArray * gst_parse_bin_autoplug_sort (GstElement * element, GstPad * pad, GstCaps * caps, GValueArray * factories) { return NULL; } static GstAutoplugSelectResult gst_parse_bin_autoplug_select (GstElement * element, GstPad * pad, GstCaps * caps, GstElementFactory * factory) { /* Try factory. */ return GST_AUTOPLUG_SELECT_TRY; } static gboolean gst_parse_bin_autoplug_query (GstElement * element, GstPad * pad, GstQuery * query) { /* No query handled here */ return FALSE; } /******** * Discovery methods *****/ static gboolean is_demuxer_element (GstElement * srcelement); static gboolean connect_pad (GstParseBin * parsebin, GstElement * src, GstParsePad * parsepad, GstPad * pad, GstCaps * caps, GValueArray * factories, GstParseChain * chain, gchar ** deadend_details); static GList *connect_element (GstParseBin * parsebin, GstParseElement * pelem, GstParseChain * chain); static void expose_pad (GstParseBin * parsebin, GstElement * src, GstParsePad * parsepad, GstPad * pad, GstCaps * caps, GstParseChain * chain); static void pad_added_cb (GstElement * element, GstPad * pad, GstParseChain * chain); static void pad_removed_cb (GstElement * element, GstPad * pad, GstParseChain * chain); static void no_more_pads_cb (GstElement * element, GstParseChain * chain); static GstParseGroup *gst_parse_chain_get_current_group (GstParseChain * chain); static gboolean clear_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data) { GST_DEBUG_OBJECT (pad, "clearing sticky event %" GST_PTR_FORMAT, *event); gst_event_unref (*event); *event = NULL; return TRUE; } static gboolean copy_sticky_events (GstPad * pad, GstEvent ** eventptr, gpointer user_data) { GstParsePad *ppad = GST_PARSE_PAD (user_data); GstEvent *event = gst_event_ref (*eventptr); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS:{ GstCaps *caps = NULL; gst_event_parse_caps (event, &caps); gst_parse_pad_update_caps (ppad, caps); break; } case GST_EVENT_STREAM_START:{ event = gst_parse_pad_stream_start_event (ppad, event); break; } case GST_EVENT_STREAM_COLLECTION:{ GstStreamCollection *collection = NULL; gst_event_parse_stream_collection (event, &collection); gst_parse_pad_update_stream_collection (ppad, collection); break; } default: break; } GST_DEBUG_OBJECT (ppad, "store sticky event %" GST_PTR_FORMAT, event); gst_pad_store_sticky_event (GST_PAD_CAST (ppad), event); gst_event_unref (event); return TRUE; } static void parse_pad_set_target (GstParsePad * parsepad, GstPad * target) { GstPad *old_target = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (parsepad)); if (old_target) gst_object_unref (old_target); if (old_target == target) return; gst_pad_sticky_events_foreach (GST_PAD_CAST (parsepad), clear_sticky_events, NULL); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (parsepad), target); if (target == NULL) { GST_LOG_OBJECT (parsepad->parsebin, "Setting pad %" GST_PTR_FORMAT " target to NULL", parsepad); } else { GST_LOG_OBJECT (parsepad->parsebin, "Setting pad %" GST_PTR_FORMAT " target to %" GST_PTR_FORMAT, parsepad, target); gst_pad_sticky_events_foreach (target, copy_sticky_events, parsepad); } } /* called when a new pad is discovered. It will perform some basic actions * before trying to link something to it. * * - Check the caps, don't do anything when there are no caps or when they have * no good type. * - signal AUTOPLUG_CONTINUE to check if we need to continue autoplugging this * pad. * - if the caps are non-fixed, setup a handler to continue autoplugging when * the caps become fixed (connect to notify::caps). * - get list of factories to autoplug. * - continue autoplugging to one of the factories. */ static void analyze_new_pad (GstParseBin * parsebin, GstElement * src, GstPad * pad, GstCaps * caps, GstParseChain * chain) { gboolean apcontinue = TRUE; GValueArray *factories = NULL, *result = NULL; GstParsePad *parsepad; GstElementFactory *factory; const gchar *classification; gboolean is_parser_converter = FALSE; gboolean res; gchar *deadend_details = NULL; GST_DEBUG_OBJECT (parsebin, "Pad %s:%s caps:%" GST_PTR_FORMAT, GST_DEBUG_PAD_NAME (pad), caps); if (chain->elements && src != ((GstParseElement *) chain->elements->data)->element && src != ((GstParseElement *) chain->elements->data)->capsfilter) { GST_ERROR_OBJECT (parsebin, "New pad from not the last element in this chain"); return; } if (chain->demuxer) { GstParseGroup *group; GstParseChain *oldchain = chain; GstParseElement *demux = (chain->elements ? chain->elements->data : NULL); if (chain->current_pad) gst_object_unref (chain->current_pad); chain->current_pad = NULL; /* we are adding a new pad for a demuxer (see is_demuxer_element(), * start a new chain for it */ CHAIN_MUTEX_LOCK (oldchain); group = gst_parse_chain_get_current_group (chain); if (group && !g_list_find (group->children, chain)) { chain = gst_parse_chain_new (parsebin, group, pad, caps); group->children = g_list_prepend (group->children, chain); } CHAIN_MUTEX_UNLOCK (oldchain); if (!group) { GST_WARNING_OBJECT (parsebin, "No current group"); return; } /* If this is not a dynamic pad demuxer, we're no-more-pads * already before anything else happens */ if (demux == NULL || !demux->no_more_pads_id) group->no_more_pads = TRUE; } /* From here on we own a reference to the caps as * we might create new caps below and would need * to unref them later */ if (caps) gst_caps_ref (caps); if ((caps == NULL) || gst_caps_is_empty (caps)) goto unknown_type; if (gst_caps_is_any (caps)) goto any_caps; if (!chain->current_pad) chain->current_pad = gst_parse_pad_new (parsebin, chain); parsepad = gst_object_ref (chain->current_pad); gst_pad_set_active (GST_PAD_CAST (parsepad), TRUE); parse_pad_set_target (parsepad, pad); /* 1. Emit 'autoplug-continue' the result will tell us if this pads needs * further autoplugging. Only do this for fixed caps, for unfixed caps * we will later come here again from the notify::caps handler. The * problem with unfixed caps is that, we can't reliably tell if the output * is e.g. accepted by a sink because only parts of the possible final * caps might be accepted by the sink. */ if (gst_caps_is_fixed (caps)) g_signal_emit (G_OBJECT (parsebin), gst_parse_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, parsepad, caps, &apcontinue); else apcontinue = TRUE; /* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */ if (!apcontinue) goto expose_pad; /* 1.b For Parser/Converter that can output different stream formats * we insert a capsfilter with the sorted caps of all possible next * elements and continue with the capsfilter srcpad */ factory = gst_element_get_factory (src); classification = gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS); is_parser_converter = (strstr (classification, "Parser") && strstr (classification, "Converter")); /* FIXME: We just need to be sure that the next element is not a parser */ /* 1.c when the caps are not fixed yet, we can't be sure what element to * connect. We delay autoplugging until the caps are fixed */ if (!is_parser_converter && !gst_caps_is_fixed (caps)) { goto non_fixed; } else if (!is_parser_converter) { gst_caps_unref (caps); caps = gst_pad_get_current_caps (pad); if (!caps) { GST_DEBUG_OBJECT (parsebin, "No final caps set yet, delaying autoplugging"); gst_object_unref (parsepad); goto setup_caps_delay; } } /* 1.d else get the factories and if there's no compatible factory goto * unknown_type */ g_signal_emit (G_OBJECT (parsebin), gst_parse_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, parsepad, caps, &factories); /* NULL means that we can expose the pad */ if (factories == NULL) goto expose_pad; /* if the array is empty, we have a type for which we have no parser */ if (factories->n_values == 0) { /* if not we have a unhandled type with no compatible factories */ g_value_array_free (factories); gst_object_unref (parsepad); goto unknown_type; } /* 1.e sort some more. */ g_signal_emit (G_OBJECT (parsebin), gst_parse_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, parsepad, caps, factories, &result); if (result) { g_value_array_free (factories); factories = result; } /* 1.g now get the factory template caps and insert the capsfilter if this * is a parser/converter */ if (is_parser_converter) { GstCaps *filter_caps; gint i; GstPad *p; GstParseElement *pelem; g_assert (chain->elements != NULL); pelem = (GstParseElement *) chain->elements->data; filter_caps = gst_caps_new_empty (); for (i = 0; i < factories->n_values; i++) { GstElementFactory *factory = g_value_get_object (g_value_array_get_nth (factories, i)); GstCaps *tcaps, *intersection; const GList *tmps; GST_DEBUG ("Trying factory %s", gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory))); if (gst_element_get_factory (src) == factory || gst_element_factory_list_is_type (factory, GST_ELEMENT_FACTORY_TYPE_PARSER)) { GST_DEBUG ("Skipping factory"); continue; } for (tmps = gst_element_factory_get_static_pad_templates (factory); tmps; tmps = tmps->next) { GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data; if (st->direction != GST_PAD_SINK || st->presence != GST_PAD_ALWAYS) continue; tcaps = gst_static_pad_template_get_caps (st); intersection = gst_caps_intersect_full (tcaps, caps, GST_CAPS_INTERSECT_FIRST); filter_caps = gst_caps_merge (filter_caps, intersection); gst_caps_unref (tcaps); } } /* Append the parser caps to prevent any not-negotiated errors */ filter_caps = gst_caps_merge (filter_caps, gst_caps_ref (caps)); pelem->capsfilter = gst_element_factory_make ("capsfilter", NULL); g_object_set (G_OBJECT (pelem->capsfilter), "caps", filter_caps, NULL); gst_caps_unref (filter_caps); gst_element_set_state (pelem->capsfilter, GST_STATE_PAUSED); gst_bin_add (GST_BIN_CAST (parsebin), gst_object_ref (pelem->capsfilter)); parse_pad_set_target (parsepad, NULL); p = gst_element_get_static_pad (pelem->capsfilter, "sink"); gst_pad_link_full (pad, p, GST_PAD_LINK_CHECK_NOTHING); gst_object_unref (p); p = gst_element_get_static_pad (pelem->capsfilter, "src"); parse_pad_set_target (parsepad, p); pad = p; gst_caps_unref (caps); caps = gst_pad_get_current_caps (pad); if (!caps) { GST_DEBUG_OBJECT (parsebin, "No final caps set yet, delaying autoplugging"); gst_object_unref (parsepad); g_value_array_free (factories); goto setup_caps_delay; } } /* 1.h else continue autoplugging something from the list. */ GST_LOG_OBJECT (pad, "Let's continue discovery on this pad"); res = connect_pad (parsebin, src, parsepad, pad, caps, factories, chain, &deadend_details); /* Need to unref the capsfilter srcpad here if * we inserted a capsfilter */ if (is_parser_converter) gst_object_unref (pad); gst_object_unref (parsepad); g_value_array_free (factories); if (!res) goto unknown_type; gst_caps_unref (caps); return; expose_pad: { GST_LOG_OBJECT (parsebin, "Pad is final. autoplug-continue:%d", apcontinue); expose_pad (parsebin, src, parsepad, pad, caps, chain); gst_object_unref (parsepad); gst_caps_unref (caps); return; } unknown_type: { GST_LOG_OBJECT (pad, "Unknown type, posting message and firing signal"); chain->deadend_details = deadend_details; chain->deadend = TRUE; chain->endcaps = caps; gst_object_replace ((GstObject **) & chain->current_pad, NULL); gst_element_post_message (GST_ELEMENT_CAST (parsebin), gst_missing_decoder_message_new (GST_ELEMENT_CAST (parsebin), caps)); g_signal_emit (G_OBJECT (parsebin), gst_parse_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps); /* Try to expose anything */ EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { if (gst_parse_chain_is_complete (parsebin->parse_chain)) { gst_parse_bin_expose (parsebin); } } EXPOSE_UNLOCK (parsebin); if (src == parsebin->typefind) { if (!caps || gst_caps_is_empty (caps)) { GST_ELEMENT_ERROR (parsebin, STREAM, TYPE_NOT_FOUND, (_("Could not determine type of stream")), (NULL)); } do_async_done (parsebin); } return; } #if 1 non_fixed: { GST_DEBUG_OBJECT (pad, "pad has non-fixed caps delay autoplugging"); gst_object_unref (parsepad); goto setup_caps_delay; } #endif any_caps: { GST_DEBUG_OBJECT (pad, "pad has ANY caps, delaying auto-plugging"); goto setup_caps_delay; } setup_caps_delay: { GstPendingPad *ppad; /* connect to caps notification */ CHAIN_MUTEX_LOCK (chain); GST_LOG_OBJECT (parsebin, "Chain %p has now %d dynamic pads", chain, g_list_length (chain->pending_pads)); ppad = g_slice_new0 (GstPendingPad); ppad->pad = gst_object_ref (pad); ppad->chain = chain; ppad->event_probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, pad_event_cb, ppad, NULL); chain->pending_pads = g_list_prepend (chain->pending_pads, ppad); ppad->notify_caps_id = g_signal_connect (pad, "notify::caps", G_CALLBACK (caps_notify_cb), chain); CHAIN_MUTEX_UNLOCK (chain); /* If we're here because we have a Parser/Converter * we have to unref the pad */ if (is_parser_converter) gst_object_unref (pad); if (caps) gst_caps_unref (caps); return; } } static void add_error_filter (GstParseBin * parsebin, GstElement * element) { GST_OBJECT_LOCK (parsebin); parsebin->filtered = g_list_prepend (parsebin->filtered, element); GST_OBJECT_UNLOCK (parsebin); } static void remove_error_filter (GstParseBin * parsebin, GstElement * element, GstMessage ** error) { GList *l; GST_OBJECT_LOCK (parsebin); parsebin->filtered = g_list_remove (parsebin->filtered, element); if (error) *error = NULL; l = parsebin->filtered_errors; while (l) { GstMessage *msg = l->data; if (GST_MESSAGE_SRC (msg) == GST_OBJECT_CAST (element)) { /* Get the last error of this element, i.e. the earliest */ if (error) gst_message_replace (error, msg); gst_message_unref (msg); l = parsebin->filtered_errors = g_list_delete_link (parsebin->filtered_errors, l); } else { l = l->next; } } GST_OBJECT_UNLOCK (parsebin); } typedef struct { gboolean ret; GstPad *peer; } SendStickyEventsData; static gboolean send_sticky_event (GstPad * pad, GstEvent ** event, gpointer user_data) { SendStickyEventsData *data = user_data; gboolean ret; ret = gst_pad_send_event (data->peer, gst_event_ref (*event)); if (!ret) data->ret = FALSE; return data->ret; } static gboolean send_sticky_events (GstParseBin * parsebin, GstPad * pad) { SendStickyEventsData data; data.ret = TRUE; data.peer = gst_pad_get_peer (pad); gst_pad_sticky_events_foreach (pad, send_sticky_event, &data); gst_object_unref (data.peer); return data.ret; } static gchar * error_message_to_string (GstMessage * msg) { GError *err; gchar *debug, *message, *full_message; gst_message_parse_error (msg, &err, &debug); message = gst_error_get_message (err->domain, err->code); if (debug) full_message = g_strdup_printf ("%s\n%s\n%s", message, err->message, debug); else full_message = g_strdup_printf ("%s\n%s", message, err->message); g_free (message); g_free (debug); g_clear_error (&err); return full_message; } /* We consider elements as "simple demuxer" when they are a demuxer * with one and only one ALWAYS source pad. */ static gboolean is_simple_demuxer_factory (GstElementFactory * factory) { if (strstr (gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS), "Demuxer")) { const GList *tmp; gint num_alway_srcpads = 0; for (tmp = gst_element_factory_get_static_pad_templates (factory); tmp; tmp = tmp->next) { GstStaticPadTemplate *template = tmp->data; if (template->direction == GST_PAD_SRC) { if (template->presence == GST_PAD_ALWAYS) { if (num_alway_srcpads >= 0) num_alway_srcpads++; } else { num_alway_srcpads = -1; } } } if (num_alway_srcpads == 1) return TRUE; } return FALSE; } /* connect_pad: * * Try to connect the given pad to an element created from one of the factories, * and recursively. * * Note that parsepad is ghosting pad, and so pad is linked; be sure to unset parsepad's * target before trying to link pad. * * Returns TRUE if an element was properly created and linked */ static gboolean connect_pad (GstParseBin * parsebin, GstElement * src, GstParsePad * parsepad, GstPad * pad, GstCaps * caps, GValueArray * factories, GstParseChain * chain, gchar ** deadend_details) { gboolean res = FALSE; GString *error_details = NULL; g_return_val_if_fail (factories != NULL, FALSE); g_return_val_if_fail (factories->n_values > 0, FALSE); GST_DEBUG_OBJECT (parsebin, "pad %s:%s , chain:%p, %d factories, caps %" GST_PTR_FORMAT, GST_DEBUG_PAD_NAME (pad), chain, factories->n_values, caps); error_details = g_string_new (""); /* 2. Try to create an element and link to it */ while (factories->n_values > 0) { GstAutoplugSelectResult ret; GstElementFactory *factory; GstParseElement *pelem; GstElement *element; GstPad *sinkpad; GParamSpec *pspec; gboolean subtitle; GList *to_connect = NULL; gboolean is_parser_converter = FALSE, is_simple_demuxer = FALSE; /* Set parsepad target to pad again, it might've been unset * below but we came back here because something failed */ parse_pad_set_target (parsepad, pad); /* take first factory */ factory = g_value_get_object (g_value_array_get_nth (factories, 0)); /* Remove selected factory from the list. */ g_value_array_remove (factories, 0); GST_LOG_OBJECT (src, "trying factory %" GST_PTR_FORMAT, factory); /* Check if the caps are really supported by the factory. The * factory list is non-empty-subset filtered while caps * are only accepted by a pad if they are a subset of the * pad caps. * * FIXME: Only do this for fixed caps here. Non-fixed caps * can happen if a Parser/Converter was autoplugged before * this. We then assume that it will be able to convert to * everything that the parser would want. * * A subset check will fail here because the parser caps * will be generic and while the parser will only * support a subset of the parser caps. */ if (gst_caps_is_fixed (caps)) { const GList *templs; gboolean skip = FALSE; templs = gst_element_factory_get_static_pad_templates (factory); while (templs) { GstStaticPadTemplate *templ = (GstStaticPadTemplate *) templs->data; if (templ->direction == GST_PAD_SINK) { GstCaps *templcaps = gst_static_caps_get (&templ->static_caps); if (!gst_caps_is_subset (caps, templcaps)) { GST_DEBUG_OBJECT (src, "caps %" GST_PTR_FORMAT " not subset of %" GST_PTR_FORMAT, caps, templcaps); gst_caps_unref (templcaps); skip = TRUE; break; } gst_caps_unref (templcaps); } templs = g_list_next (templs); } if (skip) continue; } /* If the factory is for a parser we first check if the factory * was already used for the current chain. If it was used already * we would otherwise create an infinite loop here because the * parser apparently accepts its own output as input. * This is only done for parsers because it's perfectly valid * to have other element classes after each other because a * parser is the only one that does not change the data. A * valid example for this would be multiple id3demux in a row. */ is_parser_converter = strstr (gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS), "Parser") != NULL; is_simple_demuxer = is_simple_demuxer_factory (factory); if (is_parser_converter) { gboolean skip = FALSE; GList *l; CHAIN_MUTEX_LOCK (chain); for (l = chain->elements; l; l = l->next) { GstParseElement *pelem = (GstParseElement *) l->data; GstElement *otherelement = pelem->element; if (gst_element_get_factory (otherelement) == factory) { skip = TRUE; break; } } if (!skip && chain->parent && chain->parent->parent) { GstParseChain *parent_chain = chain->parent->parent; GstParseElement *pelem = parent_chain->elements ? parent_chain->elements->data : NULL; if (pelem && gst_element_get_factory (pelem->element) == factory) skip = TRUE; } CHAIN_MUTEX_UNLOCK (chain); if (skip) { GST_DEBUG_OBJECT (parsebin, "Skipping factory '%s' because it was already used in this chain", gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory))); continue; } } /* Expose pads if the next factory is a decoder */ if (gst_element_factory_list_is_type (factory, GST_ELEMENT_FACTORY_TYPE_DECODER)) { ret = GST_AUTOPLUG_SELECT_EXPOSE; } else { /* emit autoplug-select to see what we should do with it. */ g_signal_emit (G_OBJECT (parsebin), gst_parse_bin_signals[SIGNAL_AUTOPLUG_SELECT], 0, parsepad, caps, factory, &ret); } switch (ret) { case GST_AUTOPLUG_SELECT_TRY: GST_DEBUG_OBJECT (parsebin, "autoplug select requested try"); break; case GST_AUTOPLUG_SELECT_EXPOSE: GST_DEBUG_OBJECT (parsebin, "autoplug select requested expose"); /* expose the pad, we don't have the source element */ expose_pad (parsebin, src, parsepad, pad, caps, chain); res = TRUE; goto beach; case GST_AUTOPLUG_SELECT_SKIP: GST_DEBUG_OBJECT (parsebin, "autoplug select requested skip"); continue; default: GST_WARNING_OBJECT (parsebin, "autoplug select returned unhandled %d", ret); break; } /* 2.0. Unlink pad */ parse_pad_set_target (parsepad, NULL); /* 2.1. Try to create an element */ if ((element = gst_element_factory_create (factory, NULL)) == NULL) { GST_WARNING_OBJECT (parsebin, "Could not create an element from %s", gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory))); g_string_append_printf (error_details, "Could not create an element from %s\n", gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory))); continue; } /* Filter errors, this will prevent the element from causing the pipeline * to error while we test it using READY state. */ add_error_filter (parsebin, element); /* We don't yet want the bin to control the element's state */ gst_element_set_locked_state (element, TRUE); /* ... add it ... */ if (!(gst_bin_add (GST_BIN_CAST (parsebin), element))) { GST_WARNING_OBJECT (parsebin, "Couldn't add %s to the bin", GST_ELEMENT_NAME (element)); remove_error_filter (parsebin, element, NULL); g_string_append_printf (error_details, "Couldn't add %s to the bin\n", GST_ELEMENT_NAME (element)); gst_object_unref (element); continue; } /* Find its sink pad. */ sinkpad = NULL; GST_OBJECT_LOCK (element); if (element->sinkpads != NULL) sinkpad = gst_object_ref (element->sinkpads->data); GST_OBJECT_UNLOCK (element); if (sinkpad == NULL) { GST_WARNING_OBJECT (parsebin, "Element %s doesn't have a sink pad", GST_ELEMENT_NAME (element)); remove_error_filter (parsebin, element, NULL); g_string_append_printf (error_details, "Element %s doesn't have a sink pad", GST_ELEMENT_NAME (element)); gst_bin_remove (GST_BIN (parsebin), element); continue; } /* ... and try to link */ if ((gst_pad_link_full (pad, sinkpad, GST_PAD_LINK_CHECK_NOTHING)) != GST_PAD_LINK_OK) { GST_WARNING_OBJECT (parsebin, "Link failed on pad %s:%s", GST_DEBUG_PAD_NAME (sinkpad)); remove_error_filter (parsebin, element, NULL); g_string_append_printf (error_details, "Link failed on pad %s:%s", GST_DEBUG_PAD_NAME (sinkpad)); gst_object_unref (sinkpad); gst_bin_remove (GST_BIN (parsebin), element); continue; } /* ... activate it ... */ if ((gst_element_set_state (element, GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) { GstMessage *error_msg; GST_WARNING_OBJECT (parsebin, "Couldn't set %s to READY", GST_ELEMENT_NAME (element)); remove_error_filter (parsebin, element, &error_msg); if (error_msg) { gchar *error_string = error_message_to_string (error_msg); g_string_append_printf (error_details, "Couldn't set %s to READY:\n%s", GST_ELEMENT_NAME (element), error_string); gst_message_unref (error_msg); g_free (error_string); } else { g_string_append_printf (error_details, "Couldn't set %s to READY", GST_ELEMENT_NAME (element)); } gst_object_unref (sinkpad); gst_bin_remove (GST_BIN (parsebin), element); continue; } /* check if we still accept the caps on the pad after setting * the element to READY */ if (!gst_pad_query_accept_caps (sinkpad, caps)) { GstMessage *error_msg; GST_WARNING_OBJECT (parsebin, "Element %s does not accept caps", GST_ELEMENT_NAME (element)); remove_error_filter (parsebin, element, &error_msg); if (error_msg) { gchar *error_string = error_message_to_string (error_msg); g_string_append_printf (error_details, "Element %s does not accept caps:\n%s", GST_ELEMENT_NAME (element), error_string); gst_message_unref (error_msg); g_free (error_string); } else { g_string_append_printf (error_details, "Element %s does not accept caps", GST_ELEMENT_NAME (element)); } gst_element_set_state (element, GST_STATE_NULL); gst_object_unref (sinkpad); gst_bin_remove (GST_BIN (parsebin), element); continue; } gst_object_unref (sinkpad); GST_LOG_OBJECT (parsebin, "linked on pad %s:%s", GST_DEBUG_PAD_NAME (pad)); CHAIN_MUTEX_LOCK (chain); pelem = g_slice_new0 (GstParseElement); pelem->element = gst_object_ref (element); pelem->capsfilter = NULL; chain->elements = g_list_prepend (chain->elements, pelem); chain->demuxer = is_demuxer_element (element); /* If we plugging a parser, mark the chain as parsed */ chain->parsed |= is_parser_converter; CHAIN_MUTEX_UNLOCK (chain); /* Set connection-speed property if needed */ if (chain->demuxer) { GParamSpec *pspec; if ((pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), "connection-speed"))) { guint64 speed = parsebin->connection_speed / 1000; gboolean wrong_type = FALSE; if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT) { GParamSpecUInt *pspecuint = G_PARAM_SPEC_UINT (pspec); speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT) { GParamSpecInt *pspecint = G_PARAM_SPEC_INT (pspec); speed = CLAMP (speed, pspecint->minimum, pspecint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT64) { GParamSpecUInt64 *pspecuint = G_PARAM_SPEC_UINT64 (pspec); speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT64) { GParamSpecInt64 *pspecint = G_PARAM_SPEC_INT64 (pspec); speed = CLAMP (speed, pspecint->minimum, pspecint->maximum); } else { GST_WARNING_OBJECT (parsebin, "The connection speed property %" G_GUINT64_FORMAT " of type %s" " is not usefull not setting it", speed, g_type_name (G_PARAM_SPEC_TYPE (pspec))); wrong_type = TRUE; } if (!wrong_type) { GST_DEBUG_OBJECT (parsebin, "setting connection-speed=%" G_GUINT64_FORMAT " to demuxer element", speed); g_object_set (element, "connection-speed", speed, NULL); } } } /* try to configure the subtitle encoding property when we can */ pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (element), "subtitle-encoding"); if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_STRING) { SUBTITLE_LOCK (parsebin); GST_DEBUG_OBJECT (parsebin, "setting subtitle-encoding=%s to element", parsebin->encoding); g_object_set (G_OBJECT (element), "subtitle-encoding", parsebin->encoding, NULL); SUBTITLE_UNLOCK (parsebin); subtitle = TRUE; } else { subtitle = FALSE; } /* link this element further */ to_connect = connect_element (parsebin, pelem, chain); if ((is_simple_demuxer || is_parser_converter) && to_connect) { GList *l; for (l = to_connect; l; l = g_list_next (l)) { GstPad *opad = GST_PAD_CAST (l->data); GstCaps *ocaps; ocaps = get_pad_caps (opad); analyze_new_pad (parsebin, pelem->element, opad, ocaps, chain); if (ocaps) gst_caps_unref (ocaps); gst_object_unref (opad); } g_list_free (to_connect); to_connect = NULL; } /* Bring the element to the state of the parent */ /* First lock element's sinkpad stream lock so no data reaches * the possible new element added when caps are sent by element * while we're still sending sticky events */ GST_PAD_STREAM_LOCK (sinkpad); if ((gst_element_set_state (element, GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE || !send_sticky_events (parsebin, pad)) { GstParseElement *dtmp = NULL; GstElement *tmp = NULL; GstMessage *error_msg; GST_PAD_STREAM_UNLOCK (sinkpad); GST_WARNING_OBJECT (parsebin, "Couldn't set %s to PAUSED", GST_ELEMENT_NAME (element)); g_list_free_full (to_connect, (GDestroyNotify) gst_object_unref); to_connect = NULL; remove_error_filter (parsebin, element, &error_msg); if (error_msg) { gchar *error_string = error_message_to_string (error_msg); g_string_append_printf (error_details, "Couldn't set %s to PAUSED:\n%s", GST_ELEMENT_NAME (element), error_string); gst_message_unref (error_msg); g_free (error_string); } else { g_string_append_printf (error_details, "Couldn't set %s to PAUSED", GST_ELEMENT_NAME (element)); } /* Remove all elements in this chain that were just added. No * other thread could've added elements in the meantime */ CHAIN_MUTEX_LOCK (chain); do { GList *l; dtmp = chain->elements->data; tmp = dtmp->element; /* Disconnect any signal handlers that might be connected * in connect_element() or analyze_pad() */ if (dtmp->pad_added_id) g_signal_handler_disconnect (tmp, dtmp->pad_added_id); if (dtmp->pad_removed_id) g_signal_handler_disconnect (tmp, dtmp->pad_removed_id); if (dtmp->no_more_pads_id) g_signal_handler_disconnect (tmp, dtmp->no_more_pads_id); for (l = chain->pending_pads; l;) { GstPendingPad *pp = l->data; GList *n; if (GST_PAD_PARENT (pp->pad) != tmp) { l = l->next; continue; } gst_pending_pad_free (pp); /* Remove element from the list, update list head and go to the * next element in the list */ n = l->next; chain->pending_pads = g_list_delete_link (chain->pending_pads, l); l = n; } if (dtmp->capsfilter) { gst_bin_remove (GST_BIN (parsebin), dtmp->capsfilter); gst_element_set_state (dtmp->capsfilter, GST_STATE_NULL); gst_object_unref (dtmp->capsfilter); } gst_bin_remove (GST_BIN (parsebin), tmp); gst_element_set_state (tmp, GST_STATE_NULL); gst_object_unref (tmp); g_slice_free (GstParseElement, dtmp); chain->elements = g_list_delete_link (chain->elements, chain->elements); } while (tmp != element); CHAIN_MUTEX_UNLOCK (chain); continue; } else { /* Everything went well, the spice must flow now */ GST_PAD_STREAM_UNLOCK (sinkpad); } /* Remove error filter now, from now on we can't gracefully * handle errors of the element anymore */ remove_error_filter (parsebin, element, NULL); /* Now let the bin handle the state */ gst_element_set_locked_state (element, FALSE); if (subtitle) { SUBTITLE_LOCK (parsebin); /* we added the element now, add it to the list of subtitle-encoding * elements when we can set the property */ parsebin->subtitles = g_list_prepend (parsebin->subtitles, element); SUBTITLE_UNLOCK (parsebin); } if (to_connect) { GList *l; for (l = to_connect; l; l = g_list_next (l)) { GstPad *opad = GST_PAD_CAST (l->data); GstCaps *ocaps; ocaps = get_pad_caps (opad); analyze_new_pad (parsebin, pelem->element, opad, ocaps, chain); if (ocaps) gst_caps_unref (ocaps); gst_object_unref (opad); } g_list_free (to_connect); to_connect = NULL; } res = TRUE; break; } beach: if (error_details) *deadend_details = g_string_free (error_details, (error_details->len == 0 || res)); else *deadend_details = NULL; return res; } static GstCaps * get_pad_caps (GstPad * pad) { GstCaps *caps; /* first check the pad caps, if this is set, we are positively sure it is * fixed and exactly what the element will produce. */ caps = gst_pad_get_current_caps (pad); /* then use the getcaps function if we don't have caps. These caps might not * be fixed in some cases, in which case analyze_new_pad will set up a * notify::caps signal to continue autoplugging. */ if (caps == NULL) caps = gst_pad_query_caps (pad, NULL); return caps; } /* Returns a list of pads that can be connected to already and * connects to pad-added and related signals */ static GList * connect_element (GstParseBin * parsebin, GstParseElement * pelem, GstParseChain * chain) { GstElement *element = pelem->element; GList *pads; gboolean dynamic = FALSE; GList *to_connect = NULL; GST_DEBUG_OBJECT (parsebin, "Attempting to connect element %s [chain:%p] further", GST_ELEMENT_NAME (element), chain); /* 1. Loop over pad templates, grabbing existing pads along the way */ for (pads = GST_ELEMENT_GET_CLASS (element)->padtemplates; pads; pads = g_list_next (pads)) { GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data); const gchar *templ_name; /* we are only interested in source pads */ if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC) continue; templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ); GST_DEBUG_OBJECT (parsebin, "got a source pad template %s", templ_name); /* figure out what kind of pad this is */ switch (GST_PAD_TEMPLATE_PRESENCE (templ)) { case GST_PAD_ALWAYS: { /* get the pad that we need to autoplug */ GstPad *pad = gst_element_get_static_pad (element, templ_name); if (pad) { GST_DEBUG_OBJECT (parsebin, "got the pad for always template %s", templ_name); /* here is the pad, we need to autoplug it */ to_connect = g_list_prepend (to_connect, pad); } else { /* strange, pad is marked as always but it's not * there. Fix the element */ GST_WARNING_OBJECT (parsebin, "could not get the pad for always template %s", templ_name); } break; } case GST_PAD_SOMETIMES: { /* try to get the pad to see if it is already created or * not */ GstPad *pad = gst_element_get_static_pad (element, templ_name); if (pad) { GST_DEBUG_OBJECT (parsebin, "got the pad for sometimes template %s", templ_name); /* the pad is created, we need to autoplug it */ to_connect = g_list_prepend (to_connect, pad); } else { GST_DEBUG_OBJECT (parsebin, "did not get the sometimes pad of template %s", templ_name); /* we have an element that will create dynamic pads */ dynamic = TRUE; } break; } case GST_PAD_REQUEST: /* ignore request pads */ GST_DEBUG_OBJECT (parsebin, "ignoring request padtemplate %s", templ_name); break; } } /* 2. if there are more potential pads, connect to relevant signals */ if (dynamic) { GST_LOG_OBJECT (parsebin, "Adding signals to element %s in chain %p", GST_ELEMENT_NAME (element), chain); pelem->pad_added_id = g_signal_connect (element, "pad-added", G_CALLBACK (pad_added_cb), chain); pelem->pad_removed_id = g_signal_connect (element, "pad-removed", G_CALLBACK (pad_removed_cb), chain); pelem->no_more_pads_id = g_signal_connect (element, "no-more-pads", G_CALLBACK (no_more_pads_cb), chain); } /* 3. return all pads that can be connected to already */ return to_connect; } /* expose_pad: * * Expose the given pad on the chain as a parsed pad. */ static void expose_pad (GstParseBin * parsebin, GstElement * src, GstParsePad * parsepad, GstPad * pad, GstCaps * caps, GstParseChain * chain) { GST_DEBUG_OBJECT (parsebin, "pad %s:%s, chain:%p", GST_DEBUG_PAD_NAME (pad), chain); gst_parse_pad_activate (parsepad, chain); chain->endpad = gst_object_ref (parsepad); if (caps) chain->endcaps = gst_caps_ref (caps); else chain->endcaps = NULL; } static void type_found (GstElement * typefind, guint probability, GstCaps * caps, GstParseBin * parse_bin) { GstPad *pad, *sink_pad; GST_DEBUG_OBJECT (parse_bin, "typefind found caps %" GST_PTR_FORMAT, caps); /* If the typefinder (but not something else) finds text/plain - i.e. that's * the top-level type of the file - then error out. */ if (gst_structure_has_name (gst_caps_get_structure (caps, 0), "text/plain")) { GST_ELEMENT_ERROR (parse_bin, STREAM, WRONG_TYPE, (_("This appears to be a text file")), ("ParseBin cannot parse plain text files")); goto exit; } /* FIXME: we can only deal with one type, we don't yet support dynamically changing * caps from the typefind element */ if (parse_bin->have_type || parse_bin->parse_chain) goto exit; parse_bin->have_type = TRUE; pad = gst_element_get_static_pad (typefind, "src"); sink_pad = gst_element_get_static_pad (typefind, "sink"); /* need some lock here to prevent race with shutdown state change * which might yank away e.g. parse_chain while building stuff here. * In typical cases, STREAM_LOCK is held and handles that, it need not * be held (if called from a proxied setcaps), so grab it anyway */ GST_PAD_STREAM_LOCK (sink_pad); parse_bin->parse_chain = gst_parse_chain_new (parse_bin, NULL, pad, caps); analyze_new_pad (parse_bin, typefind, pad, caps, parse_bin->parse_chain); GST_PAD_STREAM_UNLOCK (sink_pad); gst_object_unref (sink_pad); gst_object_unref (pad); exit: return; } static GstPadProbeReturn pad_event_cb (GstPad * pad, GstPadProbeInfo * info, gpointer data) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GstPendingPad *ppad = (GstPendingPad *) data; GstParseChain *chain = ppad->chain; GstParseBin *parsebin = chain->parsebin; g_assert (ppad); g_assert (chain); g_assert (parsebin); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: GST_DEBUG_OBJECT (pad, "Received EOS on a non final pad, this stream " "ended too early"); chain->deadend = TRUE; chain->drained = TRUE; gst_object_replace ((GstObject **) & chain->current_pad, NULL); /* we don't set the endcaps because NULL endcaps means early EOS */ EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) if (gst_parse_chain_is_complete (parsebin->parse_chain)) gst_parse_bin_expose (parsebin); EXPOSE_UNLOCK (parsebin); break; default: break; } return GST_PAD_PROBE_OK; } static void pad_added_cb (GstElement * element, GstPad * pad, GstParseChain * chain) { GstCaps *caps; GstParseBin *parsebin; parsebin = chain->parsebin; GST_DEBUG_OBJECT (pad, "pad added, chain:%p", chain); caps = get_pad_caps (pad); analyze_new_pad (parsebin, element, pad, caps, chain); if (caps) gst_caps_unref (caps); EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { if (gst_parse_chain_is_complete (parsebin->parse_chain)) { GST_LOG_OBJECT (parsebin, "That was the last dynamic object, now attempting to expose the group"); if (!gst_parse_bin_expose (parsebin)) GST_WARNING_OBJECT (parsebin, "Couldn't expose group"); } } else { GST_DEBUG_OBJECT (parsebin, "No parse chain, new pad ignored"); } EXPOSE_UNLOCK (parsebin); } static void pad_removed_cb (GstElement * element, GstPad * pad, GstParseChain * chain) { GList *l; GST_LOG_OBJECT (pad, "pad removed, chain:%p", chain); /* In fact, we don't have to do anything here, the active group will be * removed when the group's multiqueue is drained */ CHAIN_MUTEX_LOCK (chain); for (l = chain->pending_pads; l; l = l->next) { GstPendingPad *ppad = l->data; GstPad *opad = ppad->pad; if (pad == opad) { gst_pending_pad_free (ppad); chain->pending_pads = g_list_delete_link (chain->pending_pads, l); break; } } CHAIN_MUTEX_UNLOCK (chain); } static void no_more_pads_cb (GstElement * element, GstParseChain * chain) { GstParseGroup *group = NULL; GST_LOG_OBJECT (element, "got no more pads"); CHAIN_MUTEX_LOCK (chain); if (!chain->elements || ((GstParseElement *) chain->elements->data)->element != element) { GST_LOG_OBJECT (chain->parsebin, "no-more-pads from old chain element '%s'", GST_OBJECT_NAME (element)); CHAIN_MUTEX_UNLOCK (chain); return; } else if (!chain->demuxer) { GST_LOG_OBJECT (chain->parsebin, "no-more-pads from a non-demuxer element '%s'", GST_OBJECT_NAME (element)); CHAIN_MUTEX_UNLOCK (chain); return; } /* when we received no_more_pads, we can complete the pads of the chain */ if (!chain->next_groups && chain->active_group) { group = chain->active_group; } else if (chain->next_groups) { GList *iter; for (iter = chain->next_groups; iter; iter = g_list_next (iter)) { group = iter->data; if (!group->no_more_pads) break; } } if (!group) { GST_ERROR_OBJECT (chain->parsebin, "can't find group for element"); CHAIN_MUTEX_UNLOCK (chain); return; } GST_DEBUG_OBJECT (element, "Setting group %p to complete", group); group->no_more_pads = TRUE; CHAIN_MUTEX_UNLOCK (chain); EXPOSE_LOCK (chain->parsebin); if (chain->parsebin->parse_chain) { if (gst_parse_chain_is_complete (chain->parsebin->parse_chain)) { gst_parse_bin_expose (chain->parsebin); } } EXPOSE_UNLOCK (chain->parsebin); } static void caps_notify_cb (GstPad * pad, GParamSpec * unused, GstParseChain * chain) { GstElement *element; GList *l; GST_LOG_OBJECT (pad, "Notified caps for pad %s:%s", GST_DEBUG_PAD_NAME (pad)); /* Disconnect this; if we still need it, we'll reconnect to this in * analyze_new_pad */ element = GST_ELEMENT_CAST (gst_pad_get_parent (pad)); CHAIN_MUTEX_LOCK (chain); for (l = chain->pending_pads; l; l = l->next) { GstPendingPad *ppad = l->data; if (ppad->pad == pad) { gst_pending_pad_free (ppad); chain->pending_pads = g_list_delete_link (chain->pending_pads, l); break; } } CHAIN_MUTEX_UNLOCK (chain); pad_added_cb (element, pad, chain); gst_object_unref (element); } /* Decide whether an element is a demuxer based on the * klass and number/type of src pad templates it has */ static gboolean is_demuxer_element (GstElement * srcelement) { GstElementFactory *srcfactory; GstElementClass *elemclass; GList *walk; const gchar *klass; gint potential_src_pads = 0; srcfactory = gst_element_get_factory (srcelement); klass = gst_element_factory_get_metadata (srcfactory, GST_ELEMENT_METADATA_KLASS); /* Can't be a demuxer unless it has Demux in the klass name */ if (!strstr (klass, "Demux")) return FALSE; /* Walk the src pad templates and count how many the element * might produce */ elemclass = GST_ELEMENT_GET_CLASS (srcelement); walk = gst_element_class_get_pad_template_list (elemclass); while (walk != NULL) { GstPadTemplate *templ; templ = (GstPadTemplate *) walk->data; if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) { switch (GST_PAD_TEMPLATE_PRESENCE (templ)) { case GST_PAD_ALWAYS: case GST_PAD_SOMETIMES: if (strstr (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), "%")) potential_src_pads += 2; /* Might make multiple pads */ else potential_src_pads += 1; break; case GST_PAD_REQUEST: potential_src_pads += 2; break; } } walk = g_list_next (walk); } if (potential_src_pads < 2) return FALSE; return TRUE; } /* gst_parse_chain_get_current_group: * * Returns the current group of this chain, to which * new chains should be attached or NULL if the last * group didn't have no-more-pads. * * Not MT-safe: Call with parent chain lock! */ static GstParseGroup * gst_parse_chain_get_current_group (GstParseChain * chain) { GstParseGroup *group; /* Now we know that we can really return something useful */ if (!chain->active_group) { chain->active_group = group = gst_parse_group_new (chain->parsebin, chain); } else if (!chain->active_group->no_more_pads) { group = chain->active_group; } else { GList *iter; group = NULL; for (iter = chain->next_groups; iter; iter = g_list_next (iter)) { GstParseGroup *next_group = iter->data; if (!next_group->no_more_pads) { group = next_group; break; } } } if (!group) { group = gst_parse_group_new (chain->parsebin, chain); chain->next_groups = g_list_append (chain->next_groups, group); } return group; } static void gst_parse_group_free_internal (GstParseGroup * group, gboolean hide); static void gst_parse_chain_free_internal (GstParseChain * chain, gboolean hide) { GList *l, *set_to_null = NULL; CHAIN_MUTEX_LOCK (chain); GST_DEBUG_OBJECT (chain->parsebin, "%s chain %p", (hide ? "Hiding" : "Freeing"), chain); if (chain->active_group) { gst_parse_group_free_internal (chain->active_group, hide); if (!hide) chain->active_group = NULL; } for (l = chain->next_groups; l; l = l->next) { gst_parse_group_free_internal ((GstParseGroup *) l->data, hide); if (!hide) l->data = NULL; } if (!hide) { g_list_free (chain->next_groups); chain->next_groups = NULL; } if (!hide) { for (l = chain->old_groups; l; l = l->next) { GstParseGroup *group = l->data; gst_parse_group_free (group); } g_list_free (chain->old_groups); chain->old_groups = NULL; } gst_object_replace ((GstObject **) & chain->current_pad, NULL); for (l = chain->pending_pads; l; l = l->next) { GstPendingPad *ppad = l->data; gst_pending_pad_free (ppad); l->data = NULL; } g_list_free (chain->pending_pads); chain->pending_pads = NULL; for (l = chain->elements; l; l = l->next) { GstParseElement *pelem = l->data; GstElement *element = pelem->element; if (pelem->pad_added_id) g_signal_handler_disconnect (element, pelem->pad_added_id); pelem->pad_added_id = 0; if (pelem->pad_removed_id) g_signal_handler_disconnect (element, pelem->pad_removed_id); pelem->pad_removed_id = 0; if (pelem->no_more_pads_id) g_signal_handler_disconnect (element, pelem->no_more_pads_id); pelem->no_more_pads_id = 0; if (pelem->capsfilter) { if (GST_OBJECT_PARENT (pelem->capsfilter) == GST_OBJECT_CAST (chain->parsebin)) gst_bin_remove (GST_BIN_CAST (chain->parsebin), pelem->capsfilter); if (!hide) { set_to_null = g_list_append (set_to_null, gst_object_ref (pelem->capsfilter)); } } if (GST_OBJECT_PARENT (element) == GST_OBJECT_CAST (chain->parsebin)) gst_bin_remove (GST_BIN_CAST (chain->parsebin), element); if (!hide) { set_to_null = g_list_append (set_to_null, gst_object_ref (element)); } SUBTITLE_LOCK (chain->parsebin); /* remove possible subtitle element */ chain->parsebin->subtitles = g_list_remove (chain->parsebin->subtitles, element); SUBTITLE_UNLOCK (chain->parsebin); if (!hide) { if (pelem->capsfilter) { gst_object_unref (pelem->capsfilter); pelem->capsfilter = NULL; } gst_object_unref (element); l->data = NULL; g_slice_free (GstParseElement, pelem); } } if (!hide) { g_list_free (chain->elements); chain->elements = NULL; } if (chain->endpad) { if (chain->endpad->exposed) { GstPad *endpad = GST_PAD_CAST (chain->endpad); GST_DEBUG_OBJECT (chain->parsebin, "Removing pad %s:%s", GST_DEBUG_PAD_NAME (endpad)); gst_pad_push_event (endpad, gst_event_new_eos ()); gst_element_remove_pad (GST_ELEMENT_CAST (chain->parsebin), endpad); } parse_pad_set_target (chain->endpad, NULL); chain->endpad->exposed = FALSE; if (!hide) { gst_object_unref (chain->endpad); chain->endpad = NULL; } } if (!hide && chain->current_pad) { gst_object_unref (chain->current_pad); chain->current_pad = NULL; } if (chain->pad) { gst_object_unref (chain->pad); chain->pad = NULL; } if (chain->start_caps) { gst_caps_unref (chain->start_caps); chain->start_caps = NULL; } if (chain->endcaps) { gst_caps_unref (chain->endcaps); chain->endcaps = NULL; } g_free (chain->deadend_details); chain->deadend_details = NULL; GST_DEBUG_OBJECT (chain->parsebin, "%s chain %p", (hide ? "Hidden" : "Freed"), chain); CHAIN_MUTEX_UNLOCK (chain); while (set_to_null) { GstElement *element = set_to_null->data; set_to_null = g_list_delete_link (set_to_null, set_to_null); gst_element_set_state (element, GST_STATE_NULL); gst_object_unref (element); } if (!hide) { g_mutex_clear (&chain->lock); g_slice_free (GstParseChain, chain); } } /* gst_parse_chain_free: * * Completely frees and removes the chain and all * child groups from ParseBin. * * MT-safe, don't hold the chain lock or any child chain's lock * when calling this! */ static void gst_parse_chain_free (GstParseChain * chain) { gst_parse_chain_free_internal (chain, FALSE); } /* gst_parse_chain_new: * * Creates a new parse chain and initializes it. * * It's up to the caller to add it to the list of child chains of * a group! */ static GstParseChain * gst_parse_chain_new (GstParseBin * parsebin, GstParseGroup * parent, GstPad * pad, GstCaps * start_caps) { GstParseChain *chain = g_slice_new0 (GstParseChain); GST_DEBUG_OBJECT (parsebin, "Creating new chain %p with parent group %p", chain, parent); chain->parsebin = parsebin; chain->parent = parent; g_mutex_init (&chain->lock); chain->pad = gst_object_ref (pad); if (start_caps) chain->start_caps = gst_caps_ref (start_caps); return chain; } /**** * GstParseGroup functions ****/ static void gst_parse_group_free_internal (GstParseGroup * group, gboolean hide) { GList *l; GST_DEBUG_OBJECT (group->parsebin, "%s group %p", (hide ? "Hiding" : "Freeing"), group); for (l = group->children; l; l = l->next) { GstParseChain *chain = (GstParseChain *) l->data; gst_parse_chain_free_internal (chain, hide); if (!hide) l->data = NULL; } if (!hide) { g_list_free (group->children); group->children = NULL; } GST_DEBUG_OBJECT (group->parsebin, "%s group %p", (hide ? "Hid" : "Freed"), group); if (!hide) g_slice_free (GstParseGroup, group); } /* gst_parse_group_free: * * Completely frees and removes the parse group and all * it's children. * * Never call this from any streaming thread! * * Not MT-safe, call with parent's chain lock! */ static void gst_parse_group_free (GstParseGroup * group) { gst_parse_group_free_internal (group, FALSE); } /* gst_parse_group_hide: * * Hide the parse group only, this means that * all child endpads are removed from ParseBin * and all signals are unconnected. * * No element is set to NULL state and completely * unrefed here. * * Can be called from streaming threads. * * Not MT-safe, call with parent's chain lock! */ static void gst_parse_group_hide (GstParseGroup * group) { gst_parse_group_free_internal (group, TRUE); } /* gst_parse_chain_free_hidden_groups: * * Frees any parse groups that were hidden previously. * This allows keeping memory use from ballooning when * switching chains repeatedly. * * A new throwaway thread will be created to free the * groups, so any delay does not block the setup of a * new group. * * Not MT-safe, call with parent's chain lock! */ static void gst_parse_chain_free_hidden_groups (GList * old_groups) { GList *l; for (l = old_groups; l; l = l->next) { GstParseGroup *group = l->data; gst_parse_group_free (group); } g_list_free (old_groups); } static void gst_parse_chain_start_free_hidden_groups_thread (GstParseChain * chain) { GThread *thread; GError *error = NULL; GList *old_groups; old_groups = chain->old_groups; if (!old_groups) return; chain->old_groups = NULL; thread = g_thread_try_new ("free-hidden-groups", (GThreadFunc) gst_parse_chain_free_hidden_groups, old_groups, &error); if (!thread || error) { GST_ERROR ("Failed to start free-hidden-groups thread: %s", error ? error->message : "unknown reason"); g_clear_error (&error); chain->old_groups = old_groups; return; } GST_DEBUG_OBJECT (chain->parsebin, "Started free-hidden-groups thread"); /* We do not need to wait for it or get any results from it */ g_thread_unref (thread); } /* gst_parse_group_new: * @parsebin: Parent ParseBin * @parent: Parent chain or %NULL * * Creates a new GstParseGroup. It is up to the caller to add it to the list * of groups. */ static GstParseGroup * gst_parse_group_new (GstParseBin * parsebin, GstParseChain * parent) { GstParseGroup *group = g_slice_new0 (GstParseGroup); GST_DEBUG_OBJECT (parsebin, "Creating new group %p with parent chain %p", group, parent); group->parsebin = parsebin; group->parent = parent; return group; } /* gst_parse_group_is_complete: * * Checks if the group is complete, this means that * a) no-more-pads happened * b) all child chains are complete * * Not MT-safe, always call with ParseBin expose lock */ static gboolean gst_parse_group_is_complete (GstParseGroup * group) { GList *l; gboolean complete = TRUE; if (!group->no_more_pads) { complete = FALSE; goto out; } for (l = group->children; l; l = l->next) { GstParseChain *chain = l->data; /* Any blocked chain requires we complete this group * since everything is synchronous, we can't proceed otherwise */ if (chain->endpad && chain->endpad->blocked) goto out; if (!gst_parse_chain_is_complete (chain)) { complete = FALSE; goto out; } } out: GST_DEBUG_OBJECT (group->parsebin, "Group %p is complete: %d", group, complete); return complete; } /* gst_parse_chain_is_complete: * * Returns TRUE if the chain is complete, this means either * a) This chain is a dead end, i.e. we have no suitable plugins * b) This chain ends in an endpad and this is blocked or exposed * c) The chain has gotten far enough to have plugged 1 parser at least. * * Not MT-safe, always call with ParseBin expose lock */ static gboolean gst_parse_chain_is_complete (GstParseChain * chain) { gboolean complete = FALSE; CHAIN_MUTEX_LOCK (chain); if (chain->parsebin->shutdown) goto out; if (chain->deadend) { complete = TRUE; goto out; } if (chain->endpad && (chain->endpad->blocked || chain->endpad->exposed)) { complete = TRUE; goto out; } if (chain->demuxer) { if (chain->active_group && gst_parse_group_is_complete (chain->active_group)) { complete = TRUE; goto out; } } if (chain->parsed) { complete = TRUE; goto out; } out: CHAIN_MUTEX_UNLOCK (chain); GST_DEBUG_OBJECT (chain->parsebin, "Chain %p is complete: %d", chain, complete); return complete; } static void chain_remove_old_groups (GstParseChain * chain) { GList *tmp; /* First go in child */ if (chain->active_group) { for (tmp = chain->active_group->children; tmp; tmp = tmp->next) { GstParseChain *child = (GstParseChain *) tmp->data; chain_remove_old_groups (child); } } if (chain->old_groups) { gst_parse_group_hide (chain->old_groups->data); gst_parse_chain_start_free_hidden_groups_thread (chain); } } static gboolean drain_and_switch_chains (GstParseChain * chain, GstParsePad * drainpad, gboolean * last_group, gboolean * drained, gboolean * switched); /* drain_and_switch_chains/groups: * * CALL WITH CHAIN LOCK (or group parent) TAKEN ! * * Goes down the chains/groups until it finds the chain * to which the drainpad belongs. * * It marks that pad/chain as drained and then will figure * out which group to switch to or not. * * last_chain will be set to TRUE if the group to which the * pad belongs is the last one. * * drained will be set to TRUE if the chain/group is drained. * * Returns: TRUE if the chain contained the target pad */ static gboolean drain_and_switch_group (GstParseGroup * group, GstParsePad * drainpad, gboolean * last_group, gboolean * drained, gboolean * switched) { gboolean handled = FALSE; GList *tmp; GST_DEBUG ("Checking group %p (target pad %s:%s)", group, GST_DEBUG_PAD_NAME (drainpad)); /* Definitely can't be in drained groups */ if (G_UNLIKELY (group->drained)) { goto beach; } /* Figure out if all our chains are drained with the * new information */ group->drained = TRUE; for (tmp = group->children; tmp; tmp = tmp->next) { GstParseChain *chain = (GstParseChain *) tmp->data; gboolean subdrained = FALSE; handled |= drain_and_switch_chains (chain, drainpad, last_group, &subdrained, switched); if (!subdrained) group->drained = FALSE; } beach: GST_DEBUG ("group %p (last_group:%d, drained:%d, switched:%d, handled:%d)", group, *last_group, group->drained, *switched, handled); *drained = group->drained; return handled; } static gboolean drain_and_switch_chains (GstParseChain * chain, GstParsePad * drainpad, gboolean * last_group, gboolean * drained, gboolean * switched) { gboolean handled = FALSE; GstParseBin *parsebin = chain->parsebin; GST_DEBUG ("Checking chain %p %s:%s (target pad %s:%s)", chain, GST_DEBUG_PAD_NAME (chain->pad), GST_DEBUG_PAD_NAME (drainpad)); CHAIN_MUTEX_LOCK (chain); /* Definitely can't be in drained chains */ if (G_UNLIKELY (chain->drained)) { goto beach; } if (chain->endpad) { /* Check if we're reached the target endchain */ if (drainpad != NULL && chain == drainpad->chain) { GST_DEBUG ("Found the target chain"); drainpad->drained = TRUE; handled = TRUE; } chain->drained = chain->endpad->drained; goto beach; } /* We known there are groups to switch to */ if (chain->next_groups) *last_group = FALSE; /* Check the active group */ if (chain->active_group) { gboolean subdrained = FALSE; handled = drain_and_switch_group (chain->active_group, drainpad, last_group, &subdrained, switched); /* The group is drained, see if we can switch to another */ if ((handled || drainpad == NULL) && subdrained && !*switched) { if (chain->next_groups) { /* Switch to next group, the actual removal of the current group will * be done when the next one is activated */ GST_DEBUG_OBJECT (parsebin, "Moving current group %p to old groups", chain->active_group); chain->old_groups = g_list_prepend (chain->old_groups, chain->active_group); GST_DEBUG_OBJECT (parsebin, "Switching to next group %p", chain->next_groups->data); chain->active_group = chain->next_groups->data; chain->next_groups = g_list_delete_link (chain->next_groups, chain->next_groups); *switched = TRUE; chain->drained = FALSE; } else { GST_DEBUG ("Group %p was the last in chain %p", chain->active_group, chain); chain->drained = TRUE; /* We're drained ! */ } } else { if (subdrained && !chain->next_groups) *drained = TRUE; } } beach: CHAIN_MUTEX_UNLOCK (chain); GST_DEBUG ("Chain %p (handled:%d, last_group:%d, drained:%d, switched:%d)", chain, handled, *last_group, chain->drained, *switched); *drained = chain->drained; if (*drained) g_signal_emit (parsebin, gst_parse_bin_signals[SIGNAL_DRAINED], 0, NULL); return handled; } /* check if the group is drained, meaning all pads have seen an EOS * event. */ static gboolean gst_parse_pad_handle_eos (GstParsePad * pad) { gboolean last_group = TRUE; gboolean switched = FALSE; gboolean drained = FALSE; GstParseChain *chain = pad->chain; GstParseBin *parsebin = chain->parsebin; GST_LOG_OBJECT (parsebin, "pad %p", pad); EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { drain_and_switch_chains (parsebin->parse_chain, pad, &last_group, &drained, &switched); if (switched) { /* If we resulted in a group switch, expose what's needed */ if (gst_parse_chain_is_complete (parsebin->parse_chain)) gst_parse_bin_expose (parsebin); } } EXPOSE_UNLOCK (parsebin); return last_group; } /* gst_parse_group_is_drained: * * Check is this group is drained and cache this result. * The group is drained if all child chains are drained. * * Not MT-safe, call with group->parent's lock */ static gboolean gst_parse_group_is_drained (GstParseGroup * group) { GList *l; gboolean drained = TRUE; if (group->drained) { drained = TRUE; goto out; } for (l = group->children; l; l = l->next) { GstParseChain *chain = l->data; CHAIN_MUTEX_LOCK (chain); if (!gst_parse_chain_is_drained (chain)) drained = FALSE; CHAIN_MUTEX_UNLOCK (chain); if (!drained) goto out; } group->drained = drained; out: GST_DEBUG_OBJECT (group->parsebin, "Group %p is drained: %d", group, drained); return drained; } /* gst_parse_chain_is_drained: * * Check is the chain is drained, which means that * either * * a) it's endpad is drained * b) there are no pending pads, the active group is drained * and there are no next groups * * Not MT-safe, call with chain lock */ static gboolean gst_parse_chain_is_drained (GstParseChain * chain) { gboolean drained = FALSE; if (chain->endpad) { drained = chain->endpad->drained; goto out; } if (chain->pending_pads) { drained = FALSE; goto out; } if (chain->active_group && gst_parse_group_is_drained (chain->active_group) && !chain->next_groups) { drained = TRUE; goto out; } out: GST_DEBUG_OBJECT (chain->parsebin, "Chain %p is drained: %d", chain, drained); return drained; } /* sort_end_pads: * GCompareFunc to use with lists of GstPad. * Sorts pads by mime type. * First video (raw, then non-raw), then audio (raw, then non-raw), * then others. * * Return: negative if ab */ static gint sort_end_pads (GstParsePad * da, GstParsePad * db) { gint va, vb; GstCaps *capsa, *capsb; GstStructure *sa, *sb; const gchar *namea, *nameb; gchar *ida, *idb; gint ret; capsa = get_pad_caps (GST_PAD_CAST (da)); capsb = get_pad_caps (GST_PAD_CAST (db)); sa = gst_caps_get_structure ((const GstCaps *) capsa, 0); sb = gst_caps_get_structure ((const GstCaps *) capsb, 0); namea = gst_structure_get_name (sa); nameb = gst_structure_get_name (sb); if (g_strrstr (namea, "video/x-raw")) va = 0; else if (g_strrstr (namea, "video/")) va = 1; else if (g_strrstr (namea, "image/")) va = 2; else if (g_strrstr (namea, "audio/x-raw")) va = 3; else if (g_strrstr (namea, "audio/")) va = 4; else va = 5; if (g_strrstr (nameb, "video/x-raw")) vb = 0; else if (g_strrstr (nameb, "video/")) vb = 1; else if (g_strrstr (nameb, "image/")) vb = 2; else if (g_strrstr (nameb, "audio/x-raw")) vb = 3; else if (g_strrstr (nameb, "audio/")) vb = 4; else vb = 5; gst_caps_unref (capsa); gst_caps_unref (capsb); if (va != vb) return va - vb; /* if otherwise the same, sort by stream-id */ ida = gst_pad_get_stream_id (GST_PAD_CAST (da)); idb = gst_pad_get_stream_id (GST_PAD_CAST (db)); ret = (ida) ? ((idb) ? strcmp (ida, idb) : -1) : 1; g_free (ida); g_free (idb); return ret; } static gboolean debug_sticky_event (GstPad * pad, GstEvent ** event, gpointer user_data) { GST_DEBUG_OBJECT (pad, "sticky event %s (%p)", GST_EVENT_TYPE_NAME (*event), *event); return TRUE; } /* Must only be called if the toplevel chain is complete and blocked! */ /* Not MT-safe, call with ParseBin expose lock! */ static gboolean gst_parse_bin_expose (GstParseBin * parsebin) { GList *tmp, *endpads; gboolean missing_plugin; GString *missing_plugin_details; gboolean already_exposed; gboolean last_group; gboolean uncollected_streams; GstStreamCollection *fallback_collection = NULL; retry: endpads = NULL; missing_plugin = FALSE; already_exposed = TRUE; last_group = TRUE; missing_plugin_details = g_string_new (""); GST_DEBUG_OBJECT (parsebin, "Exposing currently active chains/groups"); /* Don't expose if we're currently shutting down */ DYN_LOCK (parsebin); if (G_UNLIKELY (parsebin->shutdown)) { GST_WARNING_OBJECT (parsebin, "Currently, shutting down, aborting exposing"); DYN_UNLOCK (parsebin); return FALSE; } DYN_UNLOCK (parsebin); /* Get the pads that we're going to expose and mark things as exposed */ uncollected_streams = FALSE; if (!gst_parse_chain_expose (parsebin->parse_chain, &endpads, &missing_plugin, missing_plugin_details, &last_group, &uncollected_streams)) { g_list_free_full (endpads, (GDestroyNotify) gst_object_unref); g_string_free (missing_plugin_details, TRUE); GST_ERROR_OBJECT (parsebin, "Broken chain/group tree"); g_return_val_if_reached (FALSE); return FALSE; } if (endpads == NULL) { if (missing_plugin) { if (missing_plugin_details->len > 0) { gchar *details = g_string_free (missing_plugin_details, FALSE); GST_ELEMENT_ERROR (parsebin, CORE, MISSING_PLUGIN, (NULL), ("no suitable plugins found:\n%s", details)); g_free (details); } else { g_string_free (missing_plugin_details, TRUE); GST_ELEMENT_ERROR (parsebin, CORE, MISSING_PLUGIN, (NULL), ("no suitable plugins found")); } } else { /* in this case, the stream ended without buffers, * just post a warning */ g_string_free (missing_plugin_details, TRUE); GST_WARNING_OBJECT (parsebin, "All streams finished without buffers. " "Last group: %d", last_group); if (last_group) { GST_ELEMENT_ERROR (parsebin, STREAM, FAILED, (NULL), ("all streams without buffers")); } else { gboolean switched = FALSE; gboolean drained = FALSE; drain_and_switch_chains (parsebin->parse_chain, NULL, &last_group, &drained, &switched); GST_ELEMENT_WARNING (parsebin, STREAM, FAILED, (NULL), ("all streams without buffers")); if (switched) { if (gst_parse_chain_is_complete (parsebin->parse_chain)) goto retry; else return FALSE; } } } do_async_done (parsebin); return FALSE; } if (uncollected_streams) { /* FIXME: Collect and use a stream id from the top chain as * upstream ID? */ fallback_collection = gst_stream_collection_new (NULL); build_fallback_collection (parsebin->parse_chain, fallback_collection); gst_element_post_message (GST_ELEMENT (parsebin), gst_message_new_stream_collection (GST_OBJECT (parsebin), fallback_collection)); } g_string_free (missing_plugin_details, TRUE); /* Check if this was called when everything was exposed already, * and see if we need to post a new fallback collection */ for (tmp = endpads; tmp && already_exposed; tmp = tmp->next) { GstParsePad *parsepad = tmp->data; already_exposed &= parsepad->exposed; } if (already_exposed) { GST_DEBUG_OBJECT (parsebin, "Everything was exposed already!"); if (fallback_collection) gst_object_unref (fallback_collection); g_list_free_full (endpads, (GDestroyNotify) gst_object_unref); return TRUE; } /* Set all already exposed pads to blocked */ for (tmp = endpads; tmp; tmp = tmp->next) { GstParsePad *parsepad = tmp->data; if (parsepad->exposed) { GST_DEBUG_OBJECT (parsepad, "blocking exposed pad"); gst_parse_pad_set_blocked (parsepad, TRUE); } } /* re-order pads : video, then audio, then others */ endpads = g_list_sort (endpads, (GCompareFunc) sort_end_pads); /* Expose pads */ for (tmp = endpads; tmp; tmp = tmp->next) { GstParsePad *parsepad = (GstParsePad *) tmp->data; gchar *padname; //if (!parsepad->blocked) //continue; /* 1. rewrite name */ padname = g_strdup_printf ("src_%u", parsebin->nbpads); parsebin->nbpads++; GST_DEBUG_OBJECT (parsebin, "About to expose parsepad %s as %s", GST_OBJECT_NAME (parsepad), padname); gst_object_set_name (GST_OBJECT (parsepad), padname); g_free (padname); gst_pad_sticky_events_foreach (GST_PAD_CAST (parsepad), debug_sticky_event, parsepad); /* 2. activate and add */ if (!parsepad->exposed) { parsepad->exposed = TRUE; if (!gst_element_add_pad (GST_ELEMENT (parsebin), GST_PAD_CAST (parsepad))) { /* not really fatal, we can try to add the other pads */ g_warning ("error adding pad to ParseBin"); parsepad->exposed = FALSE; continue; } #if 0 /* HACK: Send an empty gap event to push sticky events */ gst_pad_push_event (GST_PAD (parsepad), gst_event_new_gap (0, GST_CLOCK_TIME_NONE)); #endif } GST_INFO_OBJECT (parsepad, "added new parsed pad"); } /* Unblock internal pads. The application should have connected stuff now * so that streaming can continue. */ for (tmp = endpads; tmp; tmp = tmp->next) { GstParsePad *parsepad = (GstParsePad *) tmp->data; if (parsepad->exposed) { GST_DEBUG_OBJECT (parsepad, "unblocking"); gst_parse_pad_unblock (parsepad); GST_DEBUG_OBJECT (parsepad, "unblocked"); } /* Send stream-collection events for any pads that don't have them, * and post a stream-collection onto the bus */ if (parsepad->active_collection == NULL && fallback_collection) { gst_pad_push_event (GST_PAD (parsepad), gst_event_new_stream_collection (fallback_collection)); } gst_object_unref (parsepad); } g_list_free (endpads); if (fallback_collection) gst_object_unref (fallback_collection); /* Remove old groups */ chain_remove_old_groups (parsebin->parse_chain); do_async_done (parsebin); GST_DEBUG_OBJECT (parsebin, "Exposed everything"); return TRUE; } /* gst_parse_chain_expose: * * Check if the chain can be exposed and add all endpads * to the endpads list. * * Not MT-safe, call with ParseBin expose lock! * */ static gboolean gst_parse_chain_expose (GstParseChain * chain, GList ** endpads, gboolean * missing_plugin, GString * missing_plugin_details, gboolean * last_group, gboolean * uncollected_streams) { GstParseGroup *group; GList *l; gboolean ret = FALSE; if (chain->deadend) { if (chain->endcaps) { if (chain->deadend_details) { g_string_append (missing_plugin_details, chain->deadend_details); g_string_append_c (missing_plugin_details, '\n'); } else { gchar *desc = gst_pb_utils_get_codec_description (chain->endcaps); gchar *caps_str = gst_caps_to_string (chain->endcaps); g_string_append_printf (missing_plugin_details, "Missing parser: %s (%s)\n", desc, caps_str); g_free (caps_str); g_free (desc); } *missing_plugin = TRUE; } return TRUE; } if (chain->endpad == NULL && chain->parsed && chain->pending_pads) { /* The chain has a pending pad from a parser, let's just * expose that now as the endpad */ GList *cur = chain->pending_pads; GstPendingPad *ppad = (GstPendingPad *) (cur->data); GstPad *endpad = gst_object_ref (ppad->pad); GstElement *elem = GST_ELEMENT (gst_object_get_parent (GST_OBJECT (endpad))); chain->pending_pads = g_list_remove (chain->pending_pads, ppad); gst_pending_pad_free (ppad); GST_DEBUG_OBJECT (chain->parsebin, "Exposing pad %" GST_PTR_FORMAT " with incomplete caps " "because it's parsed", endpad); expose_pad (chain->parsebin, elem, chain->current_pad, endpad, NULL, chain); gst_object_unref (endpad); gst_object_unref (elem); } if (chain->endpad) { GstParsePad *p = chain->endpad; if (p->active_stream && p->active_collection == NULL && !p->in_a_fallback_collection) *uncollected_streams = TRUE; *endpads = g_list_prepend (*endpads, gst_object_ref (p)); return TRUE; } if (chain->next_groups) *last_group = FALSE; group = chain->active_group; if (!group) { GstParsePad *p = chain->current_pad; if (p->active_stream && p->active_collection == NULL && !p->in_a_fallback_collection) *uncollected_streams = TRUE; return FALSE; } for (l = group->children; l; l = l->next) { GstParseChain *childchain = l->data; ret |= gst_parse_chain_expose (childchain, endpads, missing_plugin, missing_plugin_details, last_group, uncollected_streams); } return ret; } static void build_fallback_collection (GstParseChain * chain, GstStreamCollection * collection) { GstParseGroup *group = chain->active_group; GList *l; /* If it's an end pad, or a not-finished chain that's * not a group, put it in the collection */ if (chain->endpad || (chain->current_pad && group == NULL)) { GstParsePad *p = chain->current_pad; if (p->active_stream != NULL && p->active_collection == NULL) { GST_DEBUG_OBJECT (p, "Adding stream to fallback collection"); gst_stream_collection_add_stream (collection, gst_object_ref (p->active_stream)); p->in_a_fallback_collection = TRUE; } return; } if (!group) return; /* we used g_list_prepend when adding children, so iterate from last * to first to maintain the original order they were added in */ for (l = g_list_last (group->children); l != NULL; l = l->prev) { GstParseChain *childchain = l->data; build_fallback_collection (childchain, collection); } } /************************* * GstParsePad functions *************************/ static void gst_parse_pad_dispose (GObject * object); static void gst_parse_pad_class_init (GstParsePadClass * klass) { GObjectClass *gobject_klass; gobject_klass = (GObjectClass *) klass; gobject_klass->dispose = gst_parse_pad_dispose; } static void gst_parse_pad_init (GstParsePad * pad) { pad->chain = NULL; pad->blocked = FALSE; pad->exposed = FALSE; pad->drained = FALSE; gst_object_ref_sink (pad); } static void gst_parse_pad_dispose (GObject * object) { GstParsePad *parsepad = (GstParsePad *) (object); parse_pad_set_target (parsepad, NULL); gst_object_replace ((GstObject **) & parsepad->active_collection, NULL); gst_object_replace ((GstObject **) & parsepad->active_stream, NULL); G_OBJECT_CLASS (gst_parse_pad_parent_class)->dispose (object); } static GstPadProbeReturn source_pad_blocked_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstParsePad *parsepad = user_data; GstParseChain *chain; GstParseBin *parsebin; GstPadProbeReturn ret = GST_PAD_PROBE_OK; if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GST_LOG_OBJECT (pad, "Seeing event '%s'", GST_EVENT_TYPE_NAME (event)); if (!GST_EVENT_IS_SERIALIZED (event)) { /* do not block on sticky or out of band events otherwise the allocation query from demuxer might block the loop thread */ GST_LOG_OBJECT (pad, "Letting OOB event through"); return GST_PAD_PROBE_PASS; } if (GST_EVENT_IS_STICKY (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS) { GstPad *peer; /* manually push sticky events to ghost pad to avoid exposing pads * that don't have the sticky events. Handle EOS separately as we * want to block the pad on it if we didn't get any buffers before * EOS and expose the pad then. */ peer = gst_pad_get_peer (pad); gst_pad_send_event (peer, event); gst_object_unref (peer); GST_LOG_OBJECT (pad, "Manually pushed sticky event through"); ret = GST_PAD_PROBE_HANDLED; goto done; } } else if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM) { GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info); if (!GST_QUERY_IS_SERIALIZED (query)) { /* do not block on non-serialized queries */ GST_LOG_OBJECT (pad, "Letting non-serialized query through"); return GST_PAD_PROBE_PASS; } if (!gst_pad_has_current_caps (pad)) { /* do not block on allocation queries before we have caps, * this would deadlock because we are doing no autoplugging * without caps. * TODO: Try to do autoplugging based on the query caps */ GST_LOG_OBJECT (pad, "Letting serialized query before caps through"); return GST_PAD_PROBE_PASS; } } chain = parsepad->chain; parsebin = chain->parsebin; GST_LOG_OBJECT (parsepad, "blocked: parsepad->chain:%p", chain); parsepad->blocked = TRUE; EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { if (!gst_parse_bin_expose (parsebin)) GST_WARNING_OBJECT (parsebin, "Couldn't expose group"); } EXPOSE_UNLOCK (parsebin); done: return ret; } /* FIXME: We can probably do some cleverer things, and maybe move this into * pbutils. Ideas: * if there are tags look if it's got an AUDIO_CODEC VIDEO_CODEC CONTAINER_FORMAT tag * Look at the factory klass designation of parsers in the chain * Consider demuxer pad names as well, sometimes they give the type away */ static GstStreamType guess_stream_type_from_caps (GstCaps * caps) { GstStructure *s; const gchar *name; if (gst_caps_get_size (caps) < 1) return GST_STREAM_TYPE_UNKNOWN; s = gst_caps_get_structure (caps, 0); name = gst_structure_get_name (s); if (g_str_has_prefix (name, "video/") || g_str_has_prefix (name, "image/")) return GST_STREAM_TYPE_VIDEO; if (g_str_has_prefix (name, "audio/")) return GST_STREAM_TYPE_AUDIO; if (g_str_has_prefix (name, "text/") || g_str_has_prefix (name, "subpicture/")) return GST_STREAM_TYPE_TEXT; return GST_STREAM_TYPE_UNKNOWN; } static void gst_parse_pad_update_caps (GstParsePad * parsepad, GstCaps * caps) { if (caps && parsepad->active_stream) { GST_DEBUG_OBJECT (parsepad, "Storing caps %" GST_PTR_FORMAT " on stream %" GST_PTR_FORMAT, caps, parsepad->active_stream); if (gst_caps_is_fixed (caps)) gst_stream_set_caps (parsepad->active_stream, caps); /* intuit a type */ if (gst_stream_get_stream_type (parsepad->active_stream) == GST_STREAM_TYPE_UNKNOWN) { GstStreamType new_type = guess_stream_type_from_caps (caps); if (new_type != GST_STREAM_TYPE_UNKNOWN) gst_stream_set_stream_type (parsepad->active_stream, new_type); } } } static void gst_parse_pad_update_tags (GstParsePad * parsepad, GstTagList * tags) { if (tags && gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM && parsepad->active_stream) { GST_DEBUG_OBJECT (parsepad, "Storing new tags %" GST_PTR_FORMAT " on stream %" GST_PTR_FORMAT, tags, parsepad->active_stream); gst_stream_set_tags (parsepad->active_stream, tags); } } static GstEvent * gst_parse_pad_stream_start_event (GstParsePad * parsepad, GstEvent * event) { GstStream *stream = NULL; const gchar *stream_id = NULL; gboolean repeat_event = FALSE; gst_event_parse_stream_start (event, &stream_id); if (parsepad->active_stream != NULL && g_str_equal (parsepad->active_stream->stream_id, stream_id)) repeat_event = TRUE; else { /* A new stream requires a new collection event, or else * we'll place it in a fallback collection later */ gst_object_replace ((GstObject **) & parsepad->active_collection, NULL); parsepad->in_a_fallback_collection = FALSE; } gst_event_parse_stream (event, &stream); if (stream == NULL) { GstCaps *caps = gst_pad_get_current_caps (GST_PAD_CAST (parsepad)); if (caps == NULL) { /* Try and get caps from the parsepad peer */ GstPad *peer = gst_ghost_pad_get_target (GST_GHOST_PAD (parsepad)); caps = gst_pad_get_current_caps (peer); gst_object_unref (peer); } if (caps == NULL && parsepad->chain && parsepad->chain->start_caps) { /* Still no caps, use the chain start caps */ caps = gst_caps_ref (parsepad->chain->start_caps); } GST_DEBUG_OBJECT (parsepad, "Saw stream_start with no GstStream. Adding one. Caps %" GST_PTR_FORMAT, caps); if (repeat_event) { stream = gst_object_ref (parsepad->active_stream); } else { stream = gst_stream_new (stream_id, NULL, GST_STREAM_TYPE_UNKNOWN, GST_STREAM_FLAG_NONE); gst_object_replace ((GstObject **) & parsepad->active_stream, (GstObject *) stream); } if (caps) { gst_parse_pad_update_caps (parsepad, caps); gst_caps_unref (caps); } event = gst_event_make_writable (event); gst_event_set_stream (event, stream); } gst_object_unref (stream); GST_LOG_OBJECT (parsepad, "Saw stream %s (GstStream %p)", stream->stream_id, stream); return event; } static void gst_parse_pad_update_stream_collection (GstParsePad * parsepad, GstStreamCollection * collection) { GST_LOG_OBJECT (parsepad, "Got new stream collection %p", collection); gst_object_replace ((GstObject **) & parsepad->active_collection, (GstObject *) collection); parsepad->in_a_fallback_collection = FALSE; } static GstPadProbeReturn gst_parse_pad_event (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GstObject *parent = gst_pad_get_parent (pad); GstParsePad *parsepad = GST_PARSE_PAD (parent); gboolean forwardit = TRUE; GST_LOG_OBJECT (pad, "%s parsepad:%p", GST_EVENT_TYPE_NAME (event), parsepad); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS:{ GstCaps *caps = NULL; gst_event_parse_caps (event, &caps); gst_parse_pad_update_caps (parsepad, caps); break; } case GST_EVENT_TAG:{ GstTagList *tags; gst_event_parse_tag (event, &tags); gst_parse_pad_update_tags (parsepad, tags); break; } case GST_EVENT_STREAM_START:{ GST_PAD_PROBE_INFO_DATA (info) = gst_parse_pad_stream_start_event (parsepad, event); break; } case GST_EVENT_STREAM_COLLECTION:{ GstStreamCollection *collection = NULL; gst_event_parse_stream_collection (event, &collection); gst_parse_pad_update_stream_collection (parsepad, collection); break; } case GST_EVENT_EOS:{ GST_DEBUG_OBJECT (pad, "we received EOS"); /* Check if all pads are drained. * * If there is no next group, we will let the EOS go through. * * If there is a next group but the current group isn't completely * drained, we will drop the EOS event. * * If there is a next group to expose and this was the last non-drained * pad for that group, we will remove the ghostpad of the current group * first, which unlinks the peer and so drops the EOS. */ forwardit = gst_parse_pad_handle_eos (parsepad); } default: break; } gst_object_unref (parent); if (forwardit) return GST_PAD_PROBE_OK; else return GST_PAD_PROBE_DROP; } static void gst_parse_pad_set_blocked (GstParsePad * parsepad, gboolean blocked) { GstParseBin *parsebin = parsepad->parsebin; GstPad *opad; DYN_LOCK (parsebin); GST_DEBUG_OBJECT (parsepad, "blocking pad: %d", blocked); opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (parsepad)); if (!opad) goto out; /* do not block if shutting down. * we do not consider/expect it blocked further below, but use other trick */ if (!blocked || !parsebin->shutdown) { if (blocked) { if (parsepad->block_id == 0) parsepad->block_id = gst_pad_add_probe (opad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM | GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM, source_pad_blocked_cb, gst_object_ref (parsepad), (GDestroyNotify) gst_object_unref); } else { if (parsepad->block_id != 0) { gst_pad_remove_probe (opad, parsepad->block_id); parsepad->block_id = 0; } parsepad->blocked = FALSE; } } if (blocked) { if (parsebin->shutdown) { /* deactivate to force flushing state to prevent NOT_LINKED errors */ gst_pad_set_active (GST_PAD_CAST (parsepad), FALSE); /* note that deactivating the target pad would have no effect here, * since elements are typically connected first (and pads exposed), * and only then brought to PAUSED state (so pads activated) */ } else { gst_object_ref (parsepad); parsebin->blocked_pads = g_list_prepend (parsebin->blocked_pads, parsepad); } } else { GList *l; if ((l = g_list_find (parsebin->blocked_pads, parsepad))) { gst_object_unref (parsepad); parsebin->blocked_pads = g_list_delete_link (parsebin->blocked_pads, l); } } gst_object_unref (opad); out: DYN_UNLOCK (parsebin); } static void gst_parse_pad_activate (GstParsePad * parsepad, GstParseChain * chain) { g_return_if_fail (chain != NULL); parsepad->chain = chain; gst_pad_set_active (GST_PAD_CAST (parsepad), TRUE); gst_parse_pad_set_blocked (parsepad, TRUE); } static void gst_parse_pad_unblock (GstParsePad * parsepad) { gst_parse_pad_set_blocked (parsepad, FALSE); } static gboolean gst_parse_pad_query (GstPad * pad, GstObject * parent, GstQuery * query) { GstParsePad *parsepad = GST_PARSE_PAD (parent); gboolean ret = FALSE; CHAIN_MUTEX_LOCK (parsepad->chain); if (!parsepad->exposed && !parsepad->parsebin->shutdown && !parsepad->chain->deadend && parsepad->chain->elements) { GstParseElement *pelem = parsepad->chain->elements->data; ret = FALSE; GST_DEBUG_OBJECT (parsepad->parsebin, "calling autoplug-query for %s (element %s): %" GST_PTR_FORMAT, GST_PAD_NAME (parsepad), GST_ELEMENT_NAME (pelem->element), query); g_signal_emit (G_OBJECT (parsepad->parsebin), gst_parse_bin_signals[SIGNAL_AUTOPLUG_QUERY], 0, parsepad, pelem->element, query, &ret); if (ret) GST_DEBUG_OBJECT (parsepad->parsebin, "autoplug-query returned %d: %" GST_PTR_FORMAT, ret, query); else GST_DEBUG_OBJECT (parsepad->parsebin, "autoplug-query returned %d", ret); } CHAIN_MUTEX_UNLOCK (parsepad->chain); /* If exposed or nothing handled the query use the default handler */ if (!ret) ret = gst_pad_query_default (pad, parent, query); return ret; } /*gst_parse_pad_new: * * Creates a new GstParsePad for the given pad. */ static GstParsePad * gst_parse_pad_new (GstParseBin * parsebin, GstParseChain * chain) { GstParsePad *parsepad; GstProxyPad *ppad; GstPadTemplate *pad_tmpl; GST_DEBUG_OBJECT (parsebin, "making new parsepad"); pad_tmpl = gst_static_pad_template_get (&parse_bin_src_template); parsepad = g_object_new (GST_TYPE_PARSE_PAD, "direction", GST_PAD_SRC, "template", pad_tmpl, NULL); gst_ghost_pad_construct (GST_GHOST_PAD_CAST (parsepad)); parsepad->chain = chain; parsepad->parsebin = parsebin; gst_object_unref (pad_tmpl); ppad = gst_proxy_pad_get_internal (GST_PROXY_PAD (parsepad)); gst_pad_set_query_function (GST_PAD_CAST (ppad), gst_parse_pad_query); /* Add downstream event probe */ GST_LOG_OBJECT (parsepad, "Adding event probe on internal pad %" GST_PTR_FORMAT, ppad); gst_pad_add_probe (GST_PAD_CAST (ppad), GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, gst_parse_pad_event, parsepad, NULL); gst_object_unref (ppad); return parsepad; } static void gst_pending_pad_free (GstPendingPad * ppad) { g_assert (ppad); g_assert (ppad->pad); if (ppad->event_probe_id != 0) gst_pad_remove_probe (ppad->pad, ppad->event_probe_id); if (ppad->notify_caps_id) g_signal_handler_disconnect (ppad->pad, ppad->notify_caps_id); gst_object_unref (ppad->pad); g_slice_free (GstPendingPad, ppad); } /***** * Element add/remove *****/ static void do_async_start (GstParseBin * parsebin) { GstMessage *message; parsebin->async_pending = TRUE; message = gst_message_new_async_start (GST_OBJECT_CAST (parsebin)); parent_class->handle_message (GST_BIN_CAST (parsebin), message); } static void do_async_done (GstParseBin * parsebin) { GstMessage *message; if (parsebin->async_pending) { message = gst_message_new_async_done (GST_OBJECT_CAST (parsebin), GST_CLOCK_TIME_NONE); parent_class->handle_message (GST_BIN_CAST (parsebin), message); parsebin->async_pending = FALSE; } } /* call with dyn_lock held */ static void unblock_pads (GstParseBin * parsebin) { GList *tmp; GST_LOG_OBJECT (parsebin, "unblocking pads"); for (tmp = parsebin->blocked_pads; tmp; tmp = tmp->next) { GstParsePad *parsepad = (GstParsePad *) tmp->data; GstPad *opad; opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (parsepad)); if (!opad) continue; GST_DEBUG_OBJECT (parsepad, "unblocking"); if (parsepad->block_id != 0) { gst_pad_remove_probe (opad, parsepad->block_id); parsepad->block_id = 0; } parsepad->blocked = FALSE; /* make flushing, prevent NOT_LINKED */ gst_pad_set_active (GST_PAD_CAST (parsepad), FALSE); gst_object_unref (parsepad); gst_object_unref (opad); GST_DEBUG_OBJECT (parsepad, "unblocked"); } /* clear, no more blocked pads */ g_list_free (parsebin->blocked_pads); parsebin->blocked_pads = NULL; } static GstStateChangeReturn gst_parse_bin_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstParseBin *parsebin = GST_PARSE_BIN (element); GstParseChain *chain_to_free = NULL; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (parsebin->typefind == NULL) goto missing_typefind; break; case GST_STATE_CHANGE_READY_TO_PAUSED: /* Make sure we've cleared all existing chains */ EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { gst_parse_chain_free (parsebin->parse_chain); parsebin->parse_chain = NULL; } EXPOSE_UNLOCK (parsebin); DYN_LOCK (parsebin); GST_LOG_OBJECT (parsebin, "clearing shutdown flag"); parsebin->shutdown = FALSE; DYN_UNLOCK (parsebin); parsebin->have_type = FALSE; ret = GST_STATE_CHANGE_ASYNC; do_async_start (parsebin); /* connect a signal to find out when the typefind element found * a type */ parsebin->have_type_id = g_signal_connect (parsebin->typefind, "have-type", G_CALLBACK (type_found), parsebin); break; case GST_STATE_CHANGE_PAUSED_TO_READY: if (parsebin->have_type_id) g_signal_handler_disconnect (parsebin->typefind, parsebin->have_type_id); parsebin->have_type_id = 0; DYN_LOCK (parsebin); GST_LOG_OBJECT (parsebin, "setting shutdown flag"); parsebin->shutdown = TRUE; unblock_pads (parsebin); DYN_UNLOCK (parsebin); default: break; } { GstStateChangeReturn bret; bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE)) goto activate_failed; else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) { do_async_done (parsebin); ret = bret; } } switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: do_async_done (parsebin); EXPOSE_LOCK (parsebin); if (parsebin->parse_chain) { chain_to_free = parsebin->parse_chain; gst_parse_chain_free_internal (parsebin->parse_chain, TRUE); parsebin->parse_chain = NULL; } EXPOSE_UNLOCK (parsebin); if (chain_to_free) gst_parse_chain_free (chain_to_free); break; case GST_STATE_CHANGE_READY_TO_NULL: default: break; } return ret; /* ERRORS */ missing_typefind: { gst_element_post_message (element, gst_missing_element_message_new (element, "typefind")); GST_ELEMENT_ERROR (parsebin, CORE, MISSING_PLUGIN, (NULL), ("no typefind!")); return GST_STATE_CHANGE_FAILURE; } activate_failed: { GST_DEBUG_OBJECT (element, "element failed to change states -- activation problem?"); do_async_done (parsebin); return GST_STATE_CHANGE_FAILURE; } } static void gst_parse_bin_handle_message (GstBin * bin, GstMessage * msg) { GstParseBin *parsebin = GST_PARSE_BIN (bin); gboolean drop = FALSE; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_ERROR:{ GST_OBJECT_LOCK (parsebin); drop = (g_list_find (parsebin->filtered, GST_MESSAGE_SRC (msg)) != NULL); if (drop) parsebin->filtered_errors = g_list_prepend (parsebin->filtered_errors, gst_message_ref (msg)); GST_OBJECT_UNLOCK (parsebin); break; } default: break; } if (drop) gst_message_unref (msg); else GST_BIN_CLASS (parent_class)->handle_message (bin, msg); } gboolean gst_parse_bin_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_parse_bin_debug, "parsebin", 0, "parser bin"); return gst_element_register (plugin, "parsebin", GST_RANK_NONE, GST_TYPE_PARSE_BIN); }