/* GStreamer * Copyright (C) <2006> Edward Hervey * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-decodebin2 * * #GstBin that auto-magically constructs a decoding pipeline using available * decoders and demuxers via auto-plugging. * * At this stage, decodebin2 is considered UNSTABLE. The API provided in the * signals is expected to change in the near future. * * To try out decodebin2, you can set the USE_DECODEBIN2 environment * variable (USE_DECODEBIN2=1 for example). This will cause playbin to use * decodebin2 instead of the older #GstDecodeBin for its internal auto-plugging. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "gstplay-marshal.h" #include "gstplay-enum.h" #include "gstfactorylists.h" /* generic templates */ static GstStaticPadTemplate decoder_bin_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate decoder_bin_src_template = GST_STATIC_PAD_TEMPLATE ("src%d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug); #define GST_CAT_DEFAULT gst_decode_bin_debug typedef struct _GstDecodeGroup GstDecodeGroup; typedef struct _GstDecodePad GstDecodePad; typedef GstGhostPadClass GstDecodePadClass; typedef struct _GstDecodeBin GstDecodeBin; typedef struct _GstDecodeBin GstDecodeBin2; typedef struct _GstDecodeBinClass GstDecodeBinClass; #define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type()) #define GST_DECODE_BIN_CAST(obj) ((GstDecodeBin*)(obj)) #define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin)) #define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass)) #define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN)) #define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN)) /** * GstDecodeBin2: * * The opaque #DecodeBin2 data structure */ struct _GstDecodeBin { GstBin bin; /* we extend GstBin */ /* properties */ GstCaps *caps; /* caps on which to stop decoding */ gchar *encoding; /* encoding of subtitles */ GstElement *typefind; /* this holds the typefind object */ GMutex *lock; /* Protects activegroup and groups */ GstDecodeGroup *activegroup; /* group currently active */ GList *groups; /* List of non-active GstDecodeGroups, sorted in * order of creation. */ GList *oldgroups; /* List of no-longer-used GstDecodeGroups. * Should be freed in dispose */ gint nbpads; /* unique identifier for source pads */ GValueArray *factories; /* factories we can use for selecting elements */ GList *subtitles; /* List of elements with subtitle-encoding */ 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 emited */ GMutex *dyn_lock; /* lock protecting pad blocking */ gboolean shutdown; /* if we are shutting down */ GList *blocked_pads; /* pads that have set to block */ }; struct _GstDecodeBinClass { GstBinClass parent_class; /* signal we fire when a new pad has been decoded into raw audio/video */ void (*new_decoded_pad) (GstElement * element, GstPad * pad, gboolean last); /* signal we fire when a pad has been removed */ void (*removed_decoded_pad) (GstElement * element, GstPad * pad); /* signal fired when we found a pad that we cannot decode */ void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps); /* signal fired to know if we continue trying to decode 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); /* fired when the last group is drained */ void (*drained) (GstElement * element); }; /* signals */ enum { SIGNAL_NEW_DECODED_PAD, SIGNAL_REMOVED_DECODED_PAD, SIGNAL_UNKNOWN_TYPE, SIGNAL_AUTOPLUG_CONTINUE, SIGNAL_AUTOPLUG_FACTORIES, SIGNAL_AUTOPLUG_SELECT, SIGNAL_AUTOPLUG_SORT, SIGNAL_DRAINED, LAST_SIGNAL }; /* Properties */ enum { PROP_0, PROP_CAPS, PROP_SUBTITLE_ENCODING, PROP_SINK_CAPS, PROP_LAST }; static GstBinClass *parent_class; static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 }; static const GstElementDetails gst_decode_bin_details = GST_ELEMENT_DETAILS ("Decoder Bin", "Generic/Bin/Decoder", "Autoplug and decode to raw media", "Edward Hervey "); static void do_async_start (GstDecodeBin * dbin); static void do_async_done (GstDecodeBin * dbin); static void type_found (GstElement * typefind, guint probability, GstCaps * caps, GstDecodeBin * decode_bin); static gboolean gst_decode_bin_autoplug_continue (GstElement * element, GstPad * pad, GstCaps * caps); static GValueArray *gst_decode_bin_autoplug_factories (GstElement * element, GstPad * pad, GstCaps * caps); static GValueArray *gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad, GstCaps * caps, GValueArray * factories); static GstAutoplugSelectResult gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad, GstCaps * caps, GstElementFactory * factory); static void gst_decode_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_decode_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps); static GstCaps *gst_decode_bin_get_caps (GstDecodeBin * dbin); static void caps_notify_group_cb (GstPad * pad, GParamSpec * unused, GstDecodeGroup * group); static void caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeBin * dbin); static GstPad *find_sink_pad (GstElement * element); static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element, GstStateChange transition); #define DECODE_BIN_LOCK(dbin) G_STMT_START { \ GST_LOG_OBJECT (dbin, \ "locking from thread %p", \ g_thread_self ()); \ g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->lock); \ GST_LOG_OBJECT (dbin, \ "locked from thread %p", \ g_thread_self ()); \ } G_STMT_END #define DECODE_BIN_UNLOCK(dbin) G_STMT_START { \ GST_LOG_OBJECT (dbin, \ "unlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->lock); \ } G_STMT_END #define DECODE_BIN_DYN_LOCK(dbin) G_STMT_START { \ GST_LOG_OBJECT (dbin, \ "dynlocking from thread %p", \ g_thread_self ()); \ g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \ GST_LOG_OBJECT (dbin, \ "dynlocked from thread %p", \ g_thread_self ()); \ } G_STMT_END #define DECODE_BIN_DYN_UNLOCK(dbin) G_STMT_START { \ GST_LOG_OBJECT (dbin, \ "dynunlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->dyn_lock); \ } G_STMT_END /* GstDecodeGroup * * Streams belonging to the same group/chain of a media file * */ struct _GstDecodeGroup { GstDecodeBin *dbin; GMutex *lock; GstElement *multiqueue; gboolean exposed; /* TRUE if this group is exposed */ gboolean drained; /* TRUE if EOS went through all endpads */ gboolean blocked; /* TRUE if all endpads are blocked */ gboolean complete; /* TRUE if we are not expecting anymore streams * on this group */ gulong overrunsig; /* the overrun signal for multiqueue */ guint nbdynamic; /* number of dynamic pads in the group. */ GList *endpads; /* List of GstDecodePad of source pads to be exposed */ GList *reqpads; /* List of RequestPads for multiqueue. */ }; #define GROUP_MUTEX_LOCK(group) G_STMT_START { \ GST_LOG_OBJECT (group->dbin, \ "locking group %p from thread %p", \ group, g_thread_self ()); \ g_mutex_lock (group->lock); \ GST_LOG_OBJECT (group->dbin, \ "locked group %p from thread %p", \ group, g_thread_self ()); \ } G_STMT_END #define GROUP_MUTEX_UNLOCK(group) G_STMT_START { \ GST_LOG_OBJECT (group->dbin, \ "unlocking group %p from thread %p", \ group, g_thread_self ()); \ g_mutex_unlock (group->lock); \ } G_STMT_END static GstDecodeGroup *gst_decode_group_new (GstDecodeBin * decode_bin, gboolean use_queue); static GstPad *gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, GstPad * pad); static gboolean gst_decode_group_control_source_pad (GstDecodeGroup * group, GstDecodePad * pad); static gboolean gst_decode_group_expose (GstDecodeGroup * group); static gboolean gst_decode_group_check_if_blocked (GstDecodeGroup * group); static void gst_decode_group_set_complete (GstDecodeGroup * group); static void gst_decode_group_hide (GstDecodeGroup * group); static void gst_decode_group_free (GstDecodeGroup * group); /* GstDecodePad * * GstPad private used for source pads of groups */ struct _GstDecodePad { GstGhostPad parent; GstDecodeBin *dbin; GstDecodeGroup *group; gboolean blocked; /* the pad is blocked */ gboolean drained; /* an EOS has been seen on the pad */ gboolean added; /* the pad is added to decodebin */ }; G_DEFINE_TYPE (GstDecodePad, gst_decode_pad, GST_TYPE_GHOST_PAD); #define GST_TYPE_DECODE_PAD (gst_decode_pad_get_type ()) #define GST_DECODE_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_PAD,GstDecodePad)) static GstDecodePad *gst_decode_pad_new (GstDecodeBin * dbin, GstPad * pad, GstDecodeGroup * group); static void gst_decode_pad_activate (GstDecodePad * dpad, GstDecodeGroup * group); static void gst_decode_pad_unblock (GstDecodePad * dpad); /******************************** * Standard GObject boilerplate * ********************************/ static void gst_decode_bin_class_init (GstDecodeBinClass * klass); static void gst_decode_bin_init (GstDecodeBin * decode_bin); static void gst_decode_bin_dispose (GObject * object); static void gst_decode_bin_finalize (GObject * object); static GType gst_decode_bin_get_type (void) { static GType gst_decode_bin_type = 0; if (!gst_decode_bin_type) { static const GTypeInfo gst_decode_bin_info = { sizeof (GstDecodeBinClass), NULL, NULL, (GClassInitFunc) gst_decode_bin_class_init, NULL, NULL, sizeof (GstDecodeBin), 0, (GInstanceInitFunc) gst_decode_bin_init, NULL }; gst_decode_bin_type = g_type_register_static (GST_TYPE_BIN, "GstDecodeBin2", &gst_decode_bin_info, 0); } return gst_decode_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; } /* 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); return FALSE; } static void gst_decode_bin_class_init (GstDecodeBinClass * 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_DEBUG_FUNCPTR (gst_decode_bin_dispose); gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_decode_bin_finalize); gobject_klass->set_property = GST_DEBUG_FUNCPTR (gst_decode_bin_set_property); gobject_klass->get_property = GST_DEBUG_FUNCPTR (gst_decode_bin_get_property); /** * GstDecodeBin2::new-decoded-pad: * @bin: The decodebin * @pad: The newly created pad * @islast: #TRUE if this is the last pad to be added. Deprecated. * * This signal gets emitted as soon as a new pad of the same type as one of * the valid 'raw' types is added. */ gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] = g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, new_decoded_pad), NULL, NULL, gst_play_marshal_VOID__OBJECT_BOOLEAN, G_TYPE_NONE, 2, GST_TYPE_PAD, G_TYPE_BOOLEAN); /** * GstDecodeBin2::removed-decoded-pad: * @bin: The decodebin * @pad: The pad that was removed * * This signal is emitted when a 'final' caps pad has been removed. */ gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD] = g_signal_new ("removed-decoded-pad", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, removed_decoded_pad), NULL, NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD); /** * GstDecodeBin2::unknown-type: * @bin: The decodebin * @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 * decoding is added to the decodebin. */ gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] = g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type), NULL, NULL, gst_marshal_VOID__OBJECT_BOXED, G_TYPE_NONE, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstDecodeBin2::autoplug-continue: * @bin: The decodebin * @pad: The #GstPad. * @caps: The #GstCaps found. * * This signal is emitted whenever decodebin2 finds a new stream. It is * emitted before looking for any elements that can handle that stream. * * Returns: #TRUE if you wish decodebin2 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 'new-decoded-pad' * signal). */ gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] = g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_continue), _gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT_BOXED, G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstDecodeBin2::autoplug-factories: * @bin: The decodebin * @pad: The #GstPad. * @caps: The #GstCaps found. * * This function is emited when an array of possible factories for @caps on * @pad is needed. Decodebin2 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. * * 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_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] = g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_factories), _gst_array_accumulator, NULL, gst_play_marshal_BOXED__OBJECT_BOXED, G_TYPE_VALUE_ARRAY, 2, GST_TYPE_PAD, GST_TYPE_CAPS); /** * GstDecodeBin2::autoplug-sort: * @bin: The decodebin * @pad: The #GstPad. * @caps: The #GstCaps. * @factories: A #GValueArray of possible #GstElementFactory to use. * * Once decodebin2 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. * * Returns: A new sorted array of #GstElementFactory objects. */ gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] = g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_sort), NULL, NULL, gst_play_marshal_BOXED__OBJECT_BOXED_BOXED, G_TYPE_VALUE_ARRAY, 3, GST_TYPE_PAD, GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY); /** * GstDecodeBin2::autoplug-select: * @bin: The decodebin * @pad: The #GstPad. * @caps: The #GstCaps. * @factory: A #GstElementFactory to use * * This signal is emitted once decodebin2 has found all the possible * #GstElementFactory that can be used to handle the given @caps. For each of * those factories, this signal is emited. * * The signal handler should return a #GST_TYPE_AUTOPLUG_SELECT_RESULT enum * value indicating what decodebin2 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. * * Returns: a #GST_TYPE_AUTOPLUG_SELECT_RESULT that indicates the required * operation. the default handler will always return * #GST_AUTOPLUG_SELECT_TRY. */ gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] = g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_select), _gst_select_accumulator, NULL, gst_play_marshal_ENUM__OBJECT_BOXED_OBJECT, GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS, GST_TYPE_ELEMENT_FACTORY); /** * GstDecodeBin2::drained * @bin: The decodebin * * This signal is emitted once decodebin2 has finished decoding all the data. * * Since: 0.10.16 */ gst_decode_bin_signals[SIGNAL_DRAINED] = g_signal_new ("drained", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, drained), NULL, NULL, gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE); g_object_class_install_property (gobject_klass, PROP_CAPS, g_param_spec_boxed ("caps", "Caps", "The caps on which to stop decoding.", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); 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)); klass->autoplug_continue = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_continue); klass->autoplug_factories = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_factories); klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_sort); klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_select); gst_element_class_add_pad_template (gstelement_klass, gst_static_pad_template_get (&decoder_bin_sink_template)); gst_element_class_add_pad_template (gstelement_klass, gst_static_pad_template_get (&decoder_bin_src_template)); gst_element_class_set_details (gstelement_klass, &gst_decode_bin_details); gstelement_klass->change_state = GST_DEBUG_FUNCPTR (gst_decode_bin_change_state); } static void gst_decode_bin_init (GstDecodeBin * decode_bin) { /* first filter out the interesting element factories */ decode_bin->factories = gst_factory_list_get_elements (GST_FACTORY_LIST_DECODER); /* we create the typefind element only once */ decode_bin->typefind = gst_element_factory_make ("typefind", "typefind"); if (!decode_bin->typefind) { g_warning ("can't find typefind element, decodebin will not work"); } else { GstPad *pad; GstPad *gpad; /* add the typefind element */ if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind)) { g_warning ("Could not add typefind element, decodebin will not work"); gst_object_unref (decode_bin->typefind); decode_bin->typefind = NULL; } /* get the sinkpad */ pad = gst_element_get_static_pad (decode_bin->typefind, "sink"); /* ghost the sink pad to ourself */ gpad = gst_ghost_pad_new ("sink", pad); gst_pad_set_active (gpad, TRUE); gst_element_add_pad (GST_ELEMENT (decode_bin), gpad); gst_object_unref (pad); /* connect a signal to find out when the typefind element found * a type */ decode_bin->have_type_id = g_signal_connect (G_OBJECT (decode_bin->typefind), "have-type", G_CALLBACK (type_found), decode_bin); } decode_bin->lock = g_mutex_new (); decode_bin->activegroup = NULL; decode_bin->groups = NULL; decode_bin->dyn_lock = g_mutex_new (); decode_bin->shutdown = FALSE; decode_bin->blocked_pads = NULL; decode_bin->caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb;video/x-raw-gray;" "audio/x-raw-int;audio/x-raw-float;" "text/plain;text/x-pango-markup"); } static void gst_decode_bin_dispose (GObject * object) { GstDecodeBin *decode_bin; GList *tmp; decode_bin = GST_DECODE_BIN (object); if (decode_bin->factories) g_value_array_free (decode_bin->factories); decode_bin->factories = NULL; if (decode_bin->activegroup) { gst_decode_group_free (decode_bin->activegroup); decode_bin->activegroup = NULL; } /* remove groups */ for (tmp = decode_bin->groups; tmp; tmp = g_list_next (tmp)) { GstDecodeGroup *group = (GstDecodeGroup *) tmp->data; gst_decode_group_free (group); } g_list_free (decode_bin->groups); decode_bin->groups = NULL; for (tmp = decode_bin->oldgroups; tmp; tmp = g_list_next (tmp)) { GstDecodeGroup *group = (GstDecodeGroup *) tmp->data; gst_decode_group_free (group); } g_list_free (decode_bin->oldgroups); decode_bin->oldgroups = NULL; if (decode_bin->caps) gst_caps_unref (decode_bin->caps); decode_bin->caps = NULL; g_free (decode_bin->encoding); decode_bin->encoding = NULL; g_list_free (decode_bin->subtitles); decode_bin->subtitles = NULL; G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_decode_bin_finalize (GObject * object) { GstDecodeBin *decode_bin; decode_bin = GST_DECODE_BIN (object); if (decode_bin->lock) { g_mutex_free (decode_bin->lock); decode_bin->lock = NULL; } if (decode_bin->dyn_lock) { g_mutex_free (decode_bin->dyn_lock); decode_bin->dyn_lock = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } /* _set_caps * Changes the caps on which decodebin will stop decoding. * Will unref the previously set one. The refcount of the given caps will be * increased. * @caps can be NULL. * * MT-safe */ static void gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps) { GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps); GST_OBJECT_LOCK (dbin); if (dbin->caps) gst_caps_unref (dbin->caps); if (caps) gst_caps_ref (caps); dbin->caps = caps; GST_OBJECT_UNLOCK (dbin); } /* _get_caps * Returns the currently configured caps on which decodebin will stop decoding. * The returned caps (if not NULL), will have its refcount incremented. * * MT-safe */ static GstCaps * gst_decode_bin_get_caps (GstDecodeBin * dbin) { GstCaps *caps; GST_DEBUG_OBJECT (dbin, "Getting currently set caps"); GST_OBJECT_LOCK (dbin); caps = dbin->caps; if (caps) gst_caps_ref (caps); GST_OBJECT_UNLOCK (dbin); return caps; } static void gst_decode_bin_set_sink_caps (GstDecodeBin * dbin, GstCaps * caps) { GST_DEBUG_OBJECT (dbin, "Setting new caps: %" GST_PTR_FORMAT, caps); g_object_set (dbin->typefind, "force-caps", caps, NULL); } static GstCaps * gst_decode_bin_get_sink_caps (GstDecodeBin * dbin) { GstCaps *caps; GST_DEBUG_OBJECT (dbin, "Getting currently set caps"); g_object_get (dbin->typefind, "force-caps", &caps, NULL); return caps; } static void gst_decode_bin_set_subs_encoding (GstDecodeBin * dbin, const gchar * encoding) { GList *walk; GST_DEBUG_OBJECT (dbin, "Setting new encoding: %s", GST_STR_NULL (encoding)); DECODE_BIN_LOCK (dbin); GST_OBJECT_LOCK (dbin); g_free (dbin->encoding); dbin->encoding = g_strdup (encoding); GST_OBJECT_UNLOCK (dbin); /* set the subtitle encoding on all added elements */ for (walk = dbin->subtitles; walk; walk = g_list_next (walk)) { g_object_set (G_OBJECT (walk->data), "subtitle-encoding", dbin->encoding, NULL); } DECODE_BIN_UNLOCK (dbin); } static gchar * gst_decode_bin_get_subs_encoding (GstDecodeBin * dbin) { gchar *encoding; GST_DEBUG_OBJECT (dbin, "Getting currently set encoding"); GST_OBJECT_LOCK (dbin); encoding = g_strdup (dbin->encoding); GST_OBJECT_UNLOCK (dbin); return encoding; } static void gst_decode_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDecodeBin *dbin; dbin = GST_DECODE_BIN (object); switch (prop_id) { case PROP_CAPS: gst_decode_bin_set_caps (dbin, g_value_get_boxed (value)); break; case PROP_SUBTITLE_ENCODING: gst_decode_bin_set_subs_encoding (dbin, g_value_get_string (value)); break; case PROP_SINK_CAPS: gst_decode_bin_set_sink_caps (dbin, g_value_get_boxed (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_decode_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDecodeBin *dbin; dbin = GST_DECODE_BIN (object); switch (prop_id) { case PROP_CAPS: g_value_take_boxed (value, gst_decode_bin_get_caps (dbin)); break; case PROP_SUBTITLE_ENCODING: g_value_take_string (value, gst_decode_bin_get_subs_encoding (dbin)); break; case PROP_SINK_CAPS: g_value_take_boxed (value, gst_decode_bin_get_sink_caps (dbin)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /***** * Default autoplug signal handlers *****/ static gboolean gst_decode_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_decode_bin_autoplug_factories (GstElement * element, GstPad * pad, GstCaps * caps) { GValueArray *result; GST_DEBUG_OBJECT (element, "finding factories"); /* return all compatible factories for caps */ result = gst_factory_list_filter (GST_DECODE_BIN_CAST (element)->factories, caps); GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result); return result; } static GValueArray * gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad, GstCaps * caps, GValueArray * factories) { GValueArray *result; result = g_value_array_copy (factories); GST_DEBUG_OBJECT (element, "autoplug-sort returns %p", result); /* return input */ return result; } static GstAutoplugSelectResult gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad, GstCaps * caps, GstElementFactory * factory) { GST_DEBUG_OBJECT (element, "default autoplug-select returns TRY"); /* Try factory. */ return GST_AUTOPLUG_SELECT_TRY; } /******** * Discovery methods *****/ static gboolean are_raw_caps (GstDecodeBin * dbin, GstCaps * caps); static gboolean is_demuxer_element (GstElement * srcelement); static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GValueArray * factories, GstDecodeGroup * group); static gboolean connect_element (GstDecodeBin * dbin, GstElement * element, GstDecodeGroup * group); static void expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, GstPad * pad, GstDecodeGroup * group); static void pad_added_group_cb (GstElement * element, GstPad * pad, GstDecodeGroup * group); static void pad_removed_group_cb (GstElement * element, GstPad * pad, GstDecodeGroup * group); static void no_more_pads_group_cb (GstElement * element, GstDecodeGroup * group); static void pad_added_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin); static void pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin); static void no_more_pads_cb (GstElement * element, GstDecodeBin * dbin); static GstDecodeGroup *get_current_group (GstDecodeBin * dbin, gboolean create, gboolean demux, gboolean * created); /* 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 (GstDecodeBin * dbin, GstElement * src, GstPad * pad, GstCaps * caps, GstDecodeGroup * group) { gboolean apcontinue = TRUE; GValueArray *factories = NULL, *result = NULL; GstDecodePad *dpad; GST_DEBUG_OBJECT (dbin, "Pad %s:%s caps:%" GST_PTR_FORMAT, GST_DEBUG_PAD_NAME (pad), caps); if ((caps == NULL) || gst_caps_is_empty (caps)) goto unknown_type; if (gst_caps_is_any (caps)) goto any_caps; dpad = gst_decode_pad_new (dbin, pad, group); /* 1. Emit 'autoplug-continue' the result will tell us if this pads needs * further autoplugging. */ g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, caps, &apcontinue); /* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */ if ((!apcontinue) || are_raw_caps (dbin, caps)) goto expose_pad; /* 1.b 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 (!gst_caps_is_fixed (caps)) goto non_fixed; /* 1.c else get the factories and if there's no compatible factory goto * unknown_type */ g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, dpad, caps, &factories); /* NULL means that we can expose the pad */ if (factories == NULL) goto expose_pad; /* if the array is empty, we have an unknown type */ if (factories->n_values == 0) { /* no compatible factories */ g_value_array_free (factories); gst_object_unref (dpad); goto unknown_type; } /* 1.d sort some more. */ g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, dpad, caps, factories, &result); g_value_array_free (factories); factories = result; /* 1.e else continue autoplugging something from the list. */ GST_LOG_OBJECT (pad, "Let's continue discovery on this pad"); connect_pad (dbin, src, dpad, pad, caps, factories, group); gst_object_unref (dpad); g_value_array_free (factories); return; expose_pad: { GST_LOG_OBJECT (dbin, "Pad is final. autoplug-continue:%d", apcontinue); expose_pad (dbin, src, dpad, pad, group); gst_object_unref (dpad); return; } unknown_type: { GST_LOG_OBJECT (pad, "Unknown type, firing signal"); g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps); /* Check if there are no pending groups, if so, commit our state */ if (dbin->groups == NULL) { do_async_done (dbin); } if (src == dbin->typefind) { gchar *desc; desc = gst_pb_utils_get_decoder_description (caps); GST_ELEMENT_ERROR (dbin, STREAM, CODEC_NOT_FOUND, (_("A %s plugin is required to play this stream, but not installed."), desc), ("No decoder to handle media type '%s'", gst_structure_get_name (gst_caps_get_structure (caps, 0)))); g_free (desc); } gst_element_post_message (GST_ELEMENT_CAST (dbin), gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps)); return; } non_fixed: { GST_DEBUG_OBJECT (pad, "pad has non-fixed caps delay autoplugging"); gst_object_unref (dpad); goto setup_caps_delay; } any_caps: { GST_WARNING_OBJECT (pad, "pad has ANY caps, not able to autoplug to anything"); goto setup_caps_delay; } setup_caps_delay: { /* connect to caps notification */ if (group) { GROUP_MUTEX_LOCK (group); group->nbdynamic++; GST_LOG ("Group %p has now %d dynamic elements", group, group->nbdynamic); GROUP_MUTEX_UNLOCK (group); g_signal_connect (G_OBJECT (pad), "notify::caps", G_CALLBACK (caps_notify_group_cb), group); } else g_signal_connect (G_OBJECT (pad), "notify::caps", G_CALLBACK (caps_notify_cb), dbin); return; } } /* connect_pad: * * Try to connect the given pad to an element created from one of the factories, * and recursively. * * Note that dpad is ghosting pad, and so pad is linked; be sure to unset dpad's * target before trying to link pad. * * Returns TRUE if an element was properly created and linked */ static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GValueArray * factories, GstDecodeGroup * group) { gboolean res = FALSE; GstPad *mqpad = NULL; g_return_val_if_fail (factories != NULL, FALSE); g_return_val_if_fail (factories->n_values > 0, FALSE); GST_DEBUG_OBJECT (dbin, "pad %s:%s , group:%p", GST_DEBUG_PAD_NAME (pad), group); /* 1. is element demuxer or parser */ if (is_demuxer_element (src)) { GST_LOG_OBJECT (src, "is a demuxer, connecting the pad through multiqueue"); if (!group) group = get_current_group (dbin, TRUE, TRUE, NULL); gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), NULL); if (!(mqpad = gst_decode_group_control_demuxer_pad (group, pad))) goto beach; src = group->multiqueue; pad = mqpad; gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), pad); } /* 2. Try to create an element and link to it */ while (factories->n_values > 0) { GstAutoplugSelectResult ret; GstElementFactory *factory; GstElement *element; GstPad *sinkpad; gboolean subtitle; /* 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); /* emit autoplug-select to see what we should do with it. */ g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT], 0, dpad, caps, factory, &ret); switch (ret) { case GST_AUTOPLUG_SELECT_TRY: GST_DEBUG_OBJECT (dbin, "autoplug select requested try"); break; case GST_AUTOPLUG_SELECT_EXPOSE: GST_DEBUG_OBJECT (dbin, "autoplug select requested expose"); /* expose the pad, we don't have the source element */ expose_pad (dbin, src, dpad, pad, group); res = TRUE; goto beach; case GST_AUTOPLUG_SELECT_SKIP: GST_DEBUG_OBJECT (dbin, "autoplug select requested skip"); continue; default: GST_WARNING_OBJECT (dbin, "autoplug select returned unhandled %d", ret); break; } /* 2.0. Unlink pad */ gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), NULL); /* 2.1. Try to create an element */ if ((element = gst_element_factory_create (factory, NULL)) == NULL) { GST_WARNING_OBJECT (dbin, "Could not create an element from %s", gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory))); continue; } /* ... activate it ... We do this before adding it to the bin so that we * don't accidentally make it post error messages that will stop * everything. */ if ((gst_element_set_state (element, GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) { GST_WARNING_OBJECT (dbin, "Couldn't set %s to READY", GST_ELEMENT_NAME (element)); gst_object_unref (element); continue; } /* 2.3. Find its sink pad, this should work after activating it. */ if (!(sinkpad = find_sink_pad (element))) { GST_WARNING_OBJECT (dbin, "Element %s doesn't have a sink pad", GST_ELEMENT_NAME (element)); gst_element_set_state (element, GST_STATE_NULL); gst_object_unref (element); continue; } /* 2.4 add it ... */ if (!(gst_bin_add (GST_BIN_CAST (dbin), element))) { GST_WARNING_OBJECT (dbin, "Couldn't add %s to the bin", GST_ELEMENT_NAME (element)); gst_object_unref (sinkpad); gst_element_set_state (element, GST_STATE_NULL); gst_object_unref (element); continue; } /* 2.5 ...and try to link */ if ((gst_pad_link (pad, sinkpad)) != GST_PAD_LINK_OK) { GST_WARNING_OBJECT (dbin, "Link failed on pad %s:%s", GST_DEBUG_PAD_NAME (sinkpad)); gst_element_set_state (element, GST_STATE_NULL); gst_object_unref (sinkpad); gst_bin_remove (GST_BIN (dbin), element); continue; } gst_object_unref (sinkpad); GST_LOG_OBJECT (dbin, "linked on pad %s:%s", GST_DEBUG_PAD_NAME (pad)); /* link this element further */ connect_element (dbin, element, group); /* try to configure the subtitle encoding property when we can */ if (g_object_class_find_property (G_OBJECT_GET_CLASS (element), "subtitle-encoding")) { GST_DEBUG_OBJECT (dbin, "setting subtitle-encoding=%s to element", dbin->encoding); g_object_set (G_OBJECT (element), "subtitle-encoding", dbin->encoding, NULL); subtitle = TRUE; } else subtitle = FALSE; /* Bring the element to the state of the parent */ if ((gst_element_set_state (element, GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE) { GST_WARNING_OBJECT (dbin, "Couldn't set %s to PAUSED", GST_ELEMENT_NAME (element)); gst_element_set_state (element, GST_STATE_NULL); gst_bin_remove (GST_BIN (dbin), element); continue; } if (subtitle) { DECODE_BIN_LOCK (dbin); /* we added the element now, add it to the list of subtitle-encoding * elements when we can set the property */ dbin->subtitles = g_list_prepend (dbin->subtitles, element); DECODE_BIN_UNLOCK (dbin); } res = TRUE; break; } beach: if (mqpad) gst_object_unref (mqpad); return res; } static gboolean connect_element (GstDecodeBin * dbin, GstElement * element, GstDecodeGroup * group) { GList *pads; gboolean res = TRUE; gboolean dynamic = FALSE; GList *to_connect = NULL; GST_DEBUG_OBJECT (dbin, "Attempting to connect element %s [group:%p] further", GST_ELEMENT_NAME (element), group); /* 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 (dbin, "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 (dbin, "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 (dbin, "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 (dbin, "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 (dbin, "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 (dbin, "ignoring request padtemplate %s", templ_name); break; } } /* 2. if there are more potential pads, connect to relevent signals */ if (dynamic) { if (group) { GST_LOG ("Adding signals to element %s in group %p", GST_ELEMENT_NAME (element), group); GROUP_MUTEX_LOCK (group); group->nbdynamic++; GST_LOG ("Group %p has now %d dynamic elements", group, group->nbdynamic); GROUP_MUTEX_UNLOCK (group); g_signal_connect (G_OBJECT (element), "pad-added", G_CALLBACK (pad_added_group_cb), group); g_signal_connect (G_OBJECT (element), "pad-removed", G_CALLBACK (pad_removed_group_cb), group); g_signal_connect (G_OBJECT (element), "no-more-pads", G_CALLBACK (no_more_pads_group_cb), group); } else { /* This is a non-grouped element, the handlers are different */ g_signal_connect (G_OBJECT (element), "pad-added", G_CALLBACK (pad_added_cb), dbin); g_signal_connect (G_OBJECT (element), "pad-removed", G_CALLBACK (pad_removed_cb), dbin); g_signal_connect (G_OBJECT (element), "no-more-pads", G_CALLBACK (no_more_pads_cb), dbin); } } /* 3. for every available pad, connect it */ for (pads = to_connect; pads; pads = g_list_next (pads)) { GstPad *pad = GST_PAD_CAST (pads->data); GstCaps *caps; caps = gst_pad_get_caps (pad); analyze_new_pad (dbin, element, pad, caps, group); if (caps) gst_caps_unref (caps); gst_object_unref (pad); } g_list_free (to_connect); return res; } /* expose_pad: * * Expose the given pad on the group as a decoded pad. * If group is NULL, a GstDecodeGroup will be created and setup properly. */ static void expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, GstPad * pad, GstDecodeGroup * group) { gboolean newgroup = FALSE; gboolean isdemux; GstPad *mqpad = NULL; GST_DEBUG_OBJECT (dbin, "pad %s:%s, group:%p", GST_DEBUG_PAD_NAME (pad), group); isdemux = is_demuxer_element (src); if (!group) group = get_current_group (dbin, TRUE, isdemux, &newgroup); if (isdemux) { GST_LOG_OBJECT (src, "connecting the pad through multiqueue"); gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), NULL); if (!(mqpad = gst_decode_group_control_demuxer_pad (group, pad))) goto beach; pad = mqpad; gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), pad); } gst_decode_group_control_source_pad (group, dpad); if (newgroup && !isdemux) { /* If we have discovered a raw pad and it doesn't belong to any group, * that means there wasn't any demuxer. In that case, we consider the * group as being complete. */ gst_decode_group_set_complete (group); } if (mqpad) gst_object_unref (mqpad); beach: return; } static void type_found (GstElement * typefind, guint probability, GstCaps * caps, GstDecodeBin * decode_bin) { GstPad *pad; GST_DEBUG_OBJECT (decode_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 (decode_bin, STREAM, WRONG_TYPE, (_("This appears to be a text file")), ("decodebin2 cannot decode plain text files")); goto exit; } /* we can only deal with one type, we don't yet support dynamically changing * caps from the typefind element */ if (decode_bin->have_type) goto exit; decode_bin->have_type = TRUE; pad = gst_element_get_static_pad (typefind, "src"); analyze_new_pad (decode_bin, typefind, pad, caps, NULL); gst_object_unref (pad); exit: return; } static void pad_added_group_cb (GstElement * element, GstPad * pad, GstDecodeGroup * group) { GstCaps *caps; gboolean expose = FALSE; GstDecodeBin *dbin; dbin = group->dbin; GST_DEBUG_OBJECT (pad, "pad added, group:%p", group); caps = gst_pad_get_caps (pad); analyze_new_pad (dbin, element, pad, caps, group); if (caps) gst_caps_unref (caps); GROUP_MUTEX_LOCK (group); if (group->nbdynamic > 0) group->nbdynamic--; GST_LOG ("Group %p has now %d dynamic objects", group, group->nbdynamic); if (group->nbdynamic == 0) expose = TRUE; GROUP_MUTEX_UNLOCK (group); if (expose) { GST_LOG_OBJECT (dbin, "That was the last dynamic object, now attempting to expose the group"); DECODE_BIN_LOCK (dbin); if (!gst_decode_group_expose (group)) GST_WARNING_OBJECT (dbin, "Couldn't expose group"); DECODE_BIN_UNLOCK (dbin); } } static void pad_removed_group_cb (GstElement * element, GstPad * pad, GstDecodeGroup * group) { GST_LOG_OBJECT (pad, "pad removed, group:%p", group); /* In fact, we don't have to do anything here, the active group will be * removed when the group's multiqueue is drained */ } static void no_more_pads_group_cb (GstElement * element, GstDecodeGroup * group) { GST_LOG_OBJECT (element, "no more pads, setting group %p to complete", group); /* when we received no_more_pads, we can complete the pads of the group */ gst_decode_group_set_complete (group); } static void pad_added_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin) { GstCaps *caps; GST_LOG_OBJECT (pad, "Pad added to non-grouped element"); caps = gst_pad_get_caps (pad); analyze_new_pad (dbin, element, pad, caps, NULL); if (caps) gst_caps_unref (caps); } static void pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin) { GST_LOG_OBJECT (pad, "Pad removed from non-grouped element"); } static void no_more_pads_cb (GstElement * element, GstDecodeBin * dbin) { GstDecodeGroup *group; GST_LOG_OBJECT (element, "No more pads, setting current group to complete"); /* Find the non-complete group, there should only be one */ if (!(group = get_current_group (dbin, FALSE, FALSE, NULL))) goto no_group; gst_decode_group_set_complete (group); return; no_group: { GST_WARNING_OBJECT (dbin, "We couldn't find a non-completed group !!"); return; } } static void caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeBin * dbin) { GstElement *element; GST_LOG_OBJECT (dbin, "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 */ g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, dbin); element = GST_ELEMENT_CAST (gst_pad_get_parent (pad)); pad_added_cb (element, pad, dbin); gst_object_unref (element); } static void caps_notify_group_cb (GstPad * pad, GParamSpec * unused, GstDecodeGroup * group) { GstElement *element; 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 */ g_signal_handlers_disconnect_by_func (pad, caps_notify_group_cb, group); element = GST_ELEMENT_CAST (gst_pad_get_parent (pad)); pad_added_group_cb (element, pad, group); 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 *templates, *walk; const gchar *klass; gint potential_src_pads = 0; srcfactory = gst_element_get_factory (srcelement); klass = gst_element_factory_get_klass (srcfactory); /* 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 = templates = 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; } /* Returns TRUE if the caps are raw, or if they are compatible with the caps * specified in the 'caps' property * * The decodebin_lock should be taken ! */ static gboolean are_raw_caps (GstDecodeBin * dbin, GstCaps * caps) { GstCaps *intersection; gboolean res; GST_LOG_OBJECT (dbin, "Checking with caps %" GST_PTR_FORMAT, caps); /* lock for getting the caps */ GST_OBJECT_LOCK (dbin); intersection = gst_caps_intersect (dbin->caps, caps); GST_OBJECT_UNLOCK (dbin); res = (!(gst_caps_is_empty (intersection))); gst_caps_unref (intersection); GST_LOG_OBJECT (dbin, "Caps are %sfinal caps", res ? "" : "not "); return res; } /**** * GstDecodeGroup functions ****/ /* The overrun callback is used to expose groups that have not yet had their * no_more_pads called while the (large) multiqueue overflowed. When this * happens we must assume that the no_more_pads will not arrive anymore and we * must expose the pads that we have. */ static void multi_queue_overrun_cb (GstElement * queue, GstDecodeGroup * group) { GstDecodeBin *dbin; gboolean expose; dbin = group->dbin; GST_LOG_OBJECT (dbin, "multiqueue %p is full", queue); GROUP_MUTEX_LOCK (group); if (group->complete) { /* the group was already complete (had the no_more_pads called), we * can ignore the overrun signal, the last remaining dynamic element * will expose the group eventually. */ GST_LOG_OBJECT (dbin, "group %p was already complete", group); expose = FALSE; } else { /* set number of dynamic element to 0, we don't expect anything anymore * and we need the groups to be 0 for the expose to work */ group->nbdynamic = 0; expose = TRUE; } GROUP_MUTEX_UNLOCK (group); if (expose) { DECODE_BIN_LOCK (dbin); if (!gst_decode_group_expose (group)) GST_WARNING_OBJECT (dbin, "Couldn't expose group"); DECODE_BIN_UNLOCK (group->dbin); } } /* gst_decode_group_new: * * Creates a new GstDecodeGroup. It is up to the caller to add it to the list * of groups. */ static GstDecodeGroup * gst_decode_group_new (GstDecodeBin * dbin, gboolean use_queue) { GstDecodeGroup *group; GstElement *mq; GST_LOG_OBJECT (dbin, "Creating new group"); if (use_queue) { if (!(mq = gst_element_factory_make ("multiqueue", NULL))) { GST_WARNING ("Couldn't create multiqueue element"); return NULL; } } else { mq = NULL; } group = g_new0 (GstDecodeGroup, 1); group->lock = g_mutex_new (); group->dbin = dbin; group->multiqueue = mq; group->exposed = FALSE; group->drained = FALSE; group->blocked = FALSE; group->complete = FALSE; group->endpads = NULL; group->reqpads = NULL; if (mq) { /* we first configure the multiqueue to buffer an unlimited number of * buffers up to 5 seconds or, when no timestamps are present, up to 2 MB of * memory. When this queue overruns, we assume the group is complete and can * be exposed. */ g_object_set (G_OBJECT (mq), "max-size-bytes", 2 * 1024 * 1024, "max-size-time", 5 * GST_SECOND, "max-size-buffers", 0, NULL); /* will expose the group */ group->overrunsig = g_signal_connect (G_OBJECT (mq), "overrun", G_CALLBACK (multi_queue_overrun_cb), group); gst_bin_add (GST_BIN (dbin), mq); gst_element_set_state (mq, GST_STATE_PAUSED); } GST_LOG_OBJECT (dbin, "Returning new group %p", group); return group; } /* get_current_group: * @dbin: the decodebin * @create: create the group when not present * @as_demux: create the group as a demuxer * @created: result when the group was created * * Returns the current non-completed group. The dynamic refcount of the group is * increased when dealing with a demuxer. * * Returns: %NULL if no groups are available, or all groups are completed. */ static GstDecodeGroup * get_current_group (GstDecodeBin * dbin, gboolean create, gboolean as_demux, gboolean * created) { GList *tmp; GstDecodeGroup *group = NULL; DECODE_BIN_LOCK (dbin); for (tmp = dbin->groups; tmp; tmp = g_list_next (tmp)) { GstDecodeGroup *this = (GstDecodeGroup *) tmp->data; GROUP_MUTEX_LOCK (this); GST_LOG_OBJECT (dbin, "group %p, complete:%d", this, this->complete); if (!this->complete) { group = this; GROUP_MUTEX_UNLOCK (this); break; } else { GROUP_MUTEX_UNLOCK (this); } } if (group == NULL && create) { group = gst_decode_group_new (dbin, as_demux); GST_LOG_OBJECT (dbin, "added group %p, demux %d", group, as_demux); dbin->groups = g_list_prepend (dbin->groups, group); if (created) *created = TRUE; /* demuxers are dynamic, we need no-more-pads or overrun now */ if (as_demux) group->nbdynamic++; } DECODE_BIN_UNLOCK (dbin); GST_LOG_OBJECT (dbin, "Returning group %p", group); return group; } /* gst_decode_group_control_demuxer_pad * * Adds a new demuxer srcpad to the given group. * * Returns the srcpad of the multiqueue corresponding the given pad. * Returns NULL if there was an error. */ static GstPad * gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, GstPad * pad) { GstPad *srcpad, *sinkpad; gchar *nb, *sinkname, *srcname; GST_LOG ("group:%p pad %s:%s", group, GST_DEBUG_PAD_NAME (pad)); srcpad = NULL; if (!(sinkpad = gst_element_get_request_pad (group->multiqueue, "sink%d"))) { GST_ERROR ("Couldn't get sinkpad from multiqueue"); return NULL; } if ((gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)) { GST_ERROR ("Couldn't link demuxer and multiqueue"); goto beach; } group->reqpads = g_list_prepend (group->reqpads, sinkpad); sinkname = gst_pad_get_name (sinkpad); nb = sinkname + 4; srcname = g_strdup_printf ("src%s", nb); g_free (sinkname); GROUP_MUTEX_LOCK (group); if (!(srcpad = gst_element_get_static_pad (group->multiqueue, srcname))) { GST_ERROR ("Couldn't get srcpad %s from multiqueue", srcname); goto chiringuito; } chiringuito: g_free (srcname); GROUP_MUTEX_UNLOCK (group); beach: gst_object_unref (sinkpad); return srcpad; } static gboolean gst_decode_group_control_source_pad (GstDecodeGroup * group, GstDecodePad * dpad) { g_return_val_if_fail (group != NULL, FALSE); GST_DEBUG_OBJECT (dpad, "adding decode pad to group %p", group); /* FIXME : check if pad is already controlled */ gst_decode_pad_activate (dpad, group); GROUP_MUTEX_LOCK (group); group->endpads = g_list_prepend (group->endpads, gst_object_ref (dpad)); GROUP_MUTEX_UNLOCK (group); return TRUE; } /* gst_decode_group_check_if_blocked: * * Call this when one of the pads blocked status has changed. * If the group is complete and blocked, the group will be marked as blocked * and will ghost/expose all pads on decodebin if the group is the current one. * * Call with the group lock taken ! MT safe * * Returns: TRUE when the group is completely blocked and ready to be exposed. */ static gboolean gst_decode_group_check_if_blocked (GstDecodeGroup * group) { GList *tmp; gboolean blocked = TRUE; GST_LOG ("group : %p , ->complete:%d , ->nbdynamic:%d", group, group->complete, group->nbdynamic); /* don't do anything if group is not complete */ if (!group->complete || group->nbdynamic) { GST_DEBUG_OBJECT (group->dbin, "Group isn't complete yet"); return FALSE; } for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; if (!dpad->blocked) { blocked = FALSE; break; } } /* Update status of group */ group->blocked = blocked; GST_LOG ("group is blocked:%d", blocked); return blocked; } /* activate the next group when there is one * * Returns: TRUE when group was the active group and there was a * next group to activate. */ static gboolean gst_decode_bin_activate_next_group (GstDecodeBin * dbin, GstDecodeGroup * group) { gboolean have_next = FALSE; DECODE_BIN_LOCK (dbin); /* Check if there is a next group to activate */ if ((group == dbin->activegroup) && dbin->groups) { GstDecodeGroup *newgroup; /* get the next group */ newgroup = (GstDecodeGroup *) dbin->groups->data; GST_DEBUG_OBJECT (dbin, "Switching to new group"); /* hide current group */ gst_decode_group_hide (group); /* expose next group */ gst_decode_group_expose (newgroup); /* we have a next group */ have_next = TRUE; } DECODE_BIN_UNLOCK (dbin); return have_next; } /* check if the group is drained, meaning all pads have seen an EOS * event. */ static void gst_decode_pad_handle_eos (GstDecodePad * pad) { GList *tmp; GstDecodeBin *dbin; GstDecodeGroup *group; gboolean drained = TRUE; group = pad->group; dbin = group->dbin; GST_LOG_OBJECT (dbin, "group : %p, pad %p", group, pad); GROUP_MUTEX_LOCK (group); /* mark pad as drained */ pad->drained = TRUE; /* Ensure we only emit the drained signal once, for this group */ if (group->drained) goto was_drained; for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; GST_LOG_OBJECT (dbin, "testing dpad %p %d", dpad, dpad->drained); if (!dpad->drained) { drained = FALSE; break; } } group->drained = drained; GROUP_MUTEX_UNLOCK (group); if (drained) { /* the current group is completely drained, try to activate the next * group. this function returns FALSE if there was no next group activated * and so we are really drained. */ if (!gst_decode_bin_activate_next_group (dbin, group)) { /* no more groups to activate, we're completely drained now */ GST_LOG_OBJECT (dbin, "all groups drained, fire signal"); g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_DRAINED], 0, NULL); } } return; was_drained: { GST_LOG_OBJECT (dbin, "group was already drained"); GROUP_MUTEX_UNLOCK (group); return; } } /* 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 (GstDecodePad * da, GstDecodePad * db) { gint va, vb; GstCaps *capsa, *capsb; GstStructure *sa, *sb; const gchar *namea, *nameb; capsa = gst_pad_get_caps (GST_PAD (da)); capsb = gst_pad_get_caps (GST_PAD (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, "audio/x-raw")) va = 2; else if (g_strrstr (namea, "audio/")) va = 3; else va = 4; if (g_strrstr (nameb, "video/x-raw-")) vb = 0; else if (g_strrstr (nameb, "video/")) vb = 1; else if (g_strrstr (nameb, "audio/x-raw")) vb = 2; else if (g_strrstr (nameb, "audio/")) vb = 3; else vb = 4; gst_caps_unref (capsa); gst_caps_unref (capsb); return va - vb; } /* gst_decode_group_expose: * * Expose this group's pads. * * Not MT safe, please take the decodebin lock */ static gboolean gst_decode_group_expose (GstDecodeGroup * group) { GList *tmp; GList *next = NULL; GstDecodeBin *dbin; dbin = group->dbin; GST_DEBUG_OBJECT (dbin, "going to expose group %p", group); if (group->nbdynamic) { GST_WARNING ("Group %p still has %d dynamic objects, not exposing yet", group, group->nbdynamic); return FALSE; } if (dbin->activegroup == group) { GST_DEBUG_OBJECT (dbin, "Group %p is already exposed, all is fine", group); return TRUE; } if (group->multiqueue) { /* update runtime limits. At runtime, we try to keep the amount of buffers * in the queues as low as possible (but at least 5 buffers). */ g_object_set (G_OBJECT (group->multiqueue), "max-size-bytes", 2 * 1024 * 1024, "max-size-time", 2 * GST_SECOND, "max-size-buffers", 5, NULL); /* we can now disconnect any overrun signal, which is used to expose the * group. */ if (group->overrunsig) { GST_LOG ("Disconnecting overrun"); g_signal_handler_disconnect (group->multiqueue, group->overrunsig); group->overrunsig = 0; } } if (dbin->activegroup) { GST_DEBUG_OBJECT (dbin, "another group %p is already exposed, waiting for EOS", dbin->activegroup); return TRUE; } if (!dbin->groups || (group != (GstDecodeGroup *) dbin->groups->data)) { GST_WARNING ("Group %p is not the first group to expose", group); return FALSE; } GST_LOG ("Exposing group %p", group); /* re-order pads : video, then audio, then others */ group->endpads = g_list_sort (group->endpads, (GCompareFunc) sort_end_pads); /* Expose pads */ for (tmp = group->endpads; tmp; tmp = next) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; gchar *padname; next = g_list_next (tmp); /* 1. rewrite name */ padname = g_strdup_printf ("src%d", dbin->nbpads); dbin->nbpads++; GST_DEBUG_OBJECT (dbin, "About to expose dpad %s as %s", GST_OBJECT_NAME (dpad), padname); gst_object_set_name (GST_OBJECT (dpad), padname); g_free (padname); /* 2. activate and add */ if (!gst_element_add_pad (GST_ELEMENT (dbin), GST_PAD (dpad))) { /* not really fatal, we can try to add the other pads */ g_warning ("error adding pad to decodebin2"); continue; } dpad->added = TRUE; /* 3. emit signal */ GST_DEBUG_OBJECT (dbin, "emitting new-decoded-pad"); g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, dpad, (next == NULL)); GST_DEBUG_OBJECT (dbin, "emitted new-decoded-pad"); } /* signal no-more-pads. This allows the application to hook stuff to the * exposed pads */ GST_LOG_OBJECT (dbin, "signalling no-more-pads"); gst_element_no_more_pads (GST_ELEMENT (dbin)); /* 4. Unblock internal pads. The application should have connected stuff now * so that streaming can continue. */ for (tmp = group->endpads; tmp; tmp = next) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; next = g_list_next (tmp); GST_DEBUG_OBJECT (dpad, "unblocking"); gst_decode_pad_unblock (dpad); GST_DEBUG_OBJECT (dpad, "unblocked"); } dbin->activegroup = group; /* pop off the first group */ if (dbin->groups && dbin->groups->data) { GST_LOG_OBJECT (dbin, "removed group %p", dbin->groups->data); dbin->groups = g_list_delete_link (dbin->groups, dbin->groups); } else { GST_LOG_OBJECT (dbin, "no more groups"); } do_async_done (dbin); group->exposed = TRUE; GST_LOG_OBJECT (dbin, "Group %p exposed", group); return TRUE; } /* must be called with the decodebin lock */ static void gst_decode_group_hide (GstDecodeGroup * group) { GList *tmp; GST_LOG ("Hiding group %p", group); if (group != group->dbin->activegroup) { GST_WARNING ("This group is not the active one, aborting"); return; } GROUP_MUTEX_LOCK (group); /* Remove ghost pads */ for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; if (dpad->added) gst_element_remove_pad (GST_ELEMENT (group->dbin), GST_PAD (dpad)); dpad->added = FALSE; } group->exposed = FALSE; GROUP_MUTEX_UNLOCK (group); group->dbin->activegroup = NULL; group->dbin->oldgroups = g_list_prepend (group->dbin->oldgroups, group); } static void deactivate_free_recursive (GstDecodeGroup * group, GstElement * element) { GstIterator *it; GstIteratorResult res; gpointer point; GstDecodeBin *dbin; dbin = group->dbin; GST_LOG ("element:%s", GST_ELEMENT_NAME (element)); /* call on downstream elements */ it = gst_element_iterate_src_pads (element); restart: while (1) { res = gst_iterator_next (it, &point); switch (res) { case GST_ITERATOR_DONE: goto done; case GST_ITERATOR_RESYNC: gst_iterator_resync (it); goto restart; case GST_ITERATOR_ERROR: { GST_WARNING ("Had an error while iterating source pads of element: %s", GST_ELEMENT_NAME (element)); goto beach; } case GST_ITERATOR_OK: { GstPad *pad = GST_PAD (point); GstPad *peerpad = NULL; if ((peerpad = gst_pad_get_peer (pad))) { GstObject *parent; parent = gst_pad_get_parent (peerpad); gst_object_unref (peerpad); if (parent && GST_IS_ELEMENT (parent)) deactivate_free_recursive (group, GST_ELEMENT (parent)); if (parent) gst_object_unref (parent); } } break; default: break; } } done: gst_element_set_state (element, GST_STATE_NULL); DECODE_BIN_LOCK (dbin); /* remove possible subtitle element */ dbin->subtitles = g_list_remove (dbin->subtitles, element); DECODE_BIN_UNLOCK (dbin); gst_bin_remove (GST_BIN (dbin), element); beach: gst_iterator_free (it); return; } static void gst_decode_group_free (GstDecodeGroup * group) { GList *tmp; GST_LOG ("group %p", group); GROUP_MUTEX_LOCK (group); /* remove exposed pads */ if (group == group->dbin->activegroup) { for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; if (dpad->added) gst_element_remove_pad (GST_ELEMENT (group->dbin), GST_PAD (dpad)); dpad->added = FALSE; } } /* Clear all GstDecodePad */ for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) gst_object_unref (tmp->data); g_list_free (group->endpads); group->endpads = NULL; /* release request pads */ for (tmp = group->reqpads; tmp; tmp = g_list_next (tmp)) { gst_element_release_request_pad (group->multiqueue, GST_PAD (tmp->data)); } g_list_free (group->reqpads); group->reqpads = NULL; /* disconnect signal handlers on multiqueue */ if (group->multiqueue) { if (group->overrunsig) g_signal_handler_disconnect (group->multiqueue, group->overrunsig); deactivate_free_recursive (group, group->multiqueue); } /* remove all elements */ GROUP_MUTEX_UNLOCK (group); g_mutex_free (group->lock); g_free (group); } /* gst_decode_group_set_complete: * * Mark the group as complete. This means no more streams will be controlled * through this group. This method is usually called when we got no_more_pads or * when we added the last pad not from a demuxer. * * When this method is called, it is possible that some dynamic plugging is * going on in streaming threads. We decrement the dynamic counter and when it * reaches zero, we check if all of our pads are blocked before we finally * expose the group. * * MT safe */ static void gst_decode_group_set_complete (GstDecodeGroup * group) { gboolean expose = FALSE; GstDecodeBin *dbin; dbin = group->dbin; GST_LOG_OBJECT (dbin, "Setting group %p to COMPLETE", group); GROUP_MUTEX_LOCK (group); group->complete = TRUE; if (group->nbdynamic > 0) group->nbdynamic--; expose = gst_decode_group_check_if_blocked (group); GROUP_MUTEX_UNLOCK (group); /* don't do anything if not blocked completely */ if (expose) { DECODE_BIN_LOCK (dbin); if (!gst_decode_group_expose (group)) GST_WARNING_OBJECT (dbin, "Couldn't expose group"); DECODE_BIN_UNLOCK (dbin); } } /************************* * GstDecodePad functions *************************/ static void gst_decode_pad_class_init (GstDecodePadClass * klass) { } static void gst_decode_pad_init (GstDecodePad * pad) { pad->group = NULL; pad->blocked = FALSE; pad->drained = FALSE; gst_object_ref (pad); gst_object_sink (pad); } static void source_pad_blocked_cb (GstDecodePad * dpad, gboolean blocked, gpointer unused) { GstDecodeGroup *group; GstDecodeBin *dbin; gboolean expose = FALSE; group = dpad->group; dbin = group->dbin; GST_LOG_OBJECT (dpad, "blocked:%d, dpad->group:%p", blocked, group); GROUP_MUTEX_LOCK (group); /* Update this GstDecodePad status */ dpad->blocked = blocked; if (blocked) expose = gst_decode_group_check_if_blocked (group); GROUP_MUTEX_UNLOCK (group); if (expose) { DECODE_BIN_LOCK (dbin); if (!gst_decode_group_expose (group)) GST_WARNING_OBJECT (dbin, "Couldn't expose group"); DECODE_BIN_UNLOCK (dbin); } } static gboolean source_pad_event_probe (GstPad * pad, GstEvent * event, GstDecodePad * dpad) { GST_LOG_OBJECT (pad, "%s dpad:%p", GST_EVENT_TYPE_NAME (event), dpad); if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) { GST_DEBUG_OBJECT (pad, "we received EOS"); /* Check if all pads are drained. If there is a next group to expose, we * will remove the ghostpad of the current group first, which unlinks the * peer and so drops the EOS. */ gst_decode_pad_handle_eos (dpad); } /* never drop events */ return TRUE; } static void gst_decode_pad_set_blocked (GstDecodePad * dpad, gboolean blocked) { GstDecodeBin *dbin = dpad->dbin; DECODE_BIN_DYN_LOCK (dbin); gst_pad_set_blocked_async (GST_PAD (dpad), blocked, (GstPadBlockCallback) source_pad_blocked_cb, NULL); if (blocked) { if (dbin->shutdown) { /* deactivate to force flushing state to prevent NOT_LINKED errors */ gst_pad_set_active (GST_PAD (dpad), FALSE); } else { gst_object_ref (dpad); dbin->blocked_pads = g_list_prepend (dbin->blocked_pads, dpad); } } else { if (g_list_find (dbin->blocked_pads, dpad)) gst_object_unref (dpad); dbin->blocked_pads = g_list_remove (dbin->blocked_pads, dpad); } DECODE_BIN_DYN_UNLOCK (dbin); } static void gst_decode_pad_add_drained_check (GstDecodePad * dpad) { gst_pad_add_event_probe (GST_PAD (dpad), G_CALLBACK (source_pad_event_probe), dpad); } static void gst_decode_pad_activate (GstDecodePad * dpad, GstDecodeGroup * group) { g_return_if_fail (group != NULL); dpad->group = group; gst_pad_set_active (GST_PAD (dpad), TRUE); gst_decode_pad_set_blocked (dpad, TRUE); gst_decode_pad_add_drained_check (dpad); } static void gst_decode_pad_unblock (GstDecodePad * dpad) { gst_decode_pad_set_blocked (dpad, FALSE); } /*gst_decode_pad_new: * * Creates a new GstDecodePad for the given pad. */ static GstDecodePad * gst_decode_pad_new (GstDecodeBin * dbin, GstPad * pad, GstDecodeGroup * group) { GstDecodePad *dpad; dpad = g_object_new (GST_TYPE_DECODE_PAD, "direction", GST_PAD_DIRECTION (pad), NULL); gst_ghost_pad_construct (GST_GHOST_PAD (dpad)); gst_ghost_pad_set_target (GST_GHOST_PAD (dpad), pad); dpad->group = group; dpad->dbin = dbin; return dpad; } /***** * Element add/remove *****/ static void do_async_start (GstDecodeBin * dbin) { GstMessage *message; dbin->async_pending = TRUE; message = gst_message_new_async_start (GST_OBJECT_CAST (dbin), FALSE); parent_class->handle_message (GST_BIN_CAST (dbin), message); } static void do_async_done (GstDecodeBin * dbin) { GstMessage *message; if (dbin->async_pending) { message = gst_message_new_async_done (GST_OBJECT_CAST (dbin)); parent_class->handle_message (GST_BIN_CAST (dbin), message); dbin->async_pending = FALSE; } } /***** * convenience functions *****/ /* find_sink_pad * * Returns the first sink pad of the given element, or NULL if it doesn't have * any. */ static GstPad * find_sink_pad (GstElement * element) { GstIterator *it; GstPad *pad = NULL; gpointer point; it = gst_element_iterate_sink_pads (element); if ((gst_iterator_next (it, &point)) == GST_ITERATOR_OK) pad = (GstPad *) point; gst_iterator_free (it); return pad; } /* call with dyn_lock held */ static void unblock_pads (GstDecodeBin * dbin) { GList *tmp, *next; for (tmp = dbin->blocked_pads; tmp; tmp = next) { GstDecodePad *dpad = (GstDecodePad *) tmp->data; next = g_list_next (tmp); GST_DEBUG_OBJECT (dpad, "unblocking"); gst_pad_set_blocked_async (GST_PAD (dpad), FALSE, (GstPadBlockCallback) source_pad_blocked_cb, NULL); /* make flushing, prevent NOT_LINKED */ GST_PAD_SET_FLUSHING (GST_PAD (dpad)); gst_object_unref (dpad); GST_DEBUG_OBJECT (dpad, "unblocked"); } /* clear, no more blocked pads */ dbin->blocked_pads = NULL; } static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstDecodeBin *dbin = GST_DECODE_BIN (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (dbin->typefind == NULL) goto missing_typefind; break; case GST_STATE_CHANGE_READY_TO_PAUSED: DECODE_BIN_DYN_LOCK (dbin); GST_LOG_OBJECT (dbin, "clearing shutdown flag"); dbin->shutdown = FALSE; DECODE_BIN_DYN_UNLOCK (dbin); dbin->have_type = FALSE; ret = GST_STATE_CHANGE_ASYNC; do_async_start (dbin); break; case GST_STATE_CHANGE_PAUSED_TO_READY: DECODE_BIN_DYN_LOCK (dbin); GST_LOG_OBJECT (dbin, "setting shutdown flag"); dbin->shutdown = TRUE; unblock_pads (dbin); DECODE_BIN_DYN_UNLOCK (dbin); 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; } switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: do_async_done (dbin); break; default: break; } return ret; /* ERRORS */ missing_typefind: { gst_element_post_message (element, gst_missing_element_message_new (element, "typefind")); GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no typefind!")); return GST_STATE_CHANGE_FAILURE; } activate_failed: { GST_DEBUG_OBJECT (element, "element failed to change states -- activation problem?"); return GST_STATE_CHANGE_FAILURE; } } gboolean gst_decode_bin_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_decode_bin_debug, "decodebin2", 0, "decoder bin"); #ifdef ENABLE_NLS GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, LOCALEDIR); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); #endif /* ENABLE_NLS */ return gst_element_register (plugin, "decodebin2", GST_RANK_NONE, GST_TYPE_DECODE_BIN); }