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Diffstat (limited to 'gst/playback/gstdecodebin2.c')
| -rw-r--r-- | gst/playback/gstdecodebin2.c | 3444 |
1 files changed, 0 insertions, 3444 deletions
diff --git a/gst/playback/gstdecodebin2.c b/gst/playback/gstdecodebin2.c deleted file mode 100644 index d05c698d..00000000 --- a/gst/playback/gstdecodebin2.c +++ /dev/null @@ -1,3444 +0,0 @@ -/* GStreamer - * Copyright (C) <2006> Edward Hervey <edward@fluendo.com> - * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk> - * - * 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. - */ - -/* Implementation notes: - * - * The following section describes how decodebin2 works internally. - * - * The first part of decodebin2 is it's typefind element, which tries - * to get the type of the input stream. If the type is found autoplugging starts. - * - * decodebin2 internally organizes the elements it autoplugged into GstDecodeChains - * and GstDecodeGroups. A decode chain is a single chain of decoding, this - * means that if decodebin2 every autoplugs an element with two+ srcpads - * (e.g. a demuxer) this will end the chain and everything following this - * demuxer will be put into decode groups below the chain. Otherwise, - * if an element has a single srcpad that outputs raw data the decode chain - * is ended too and a GstDecodePad is stored and blocked. - * - * A decode group combines a number of chains that are created by a - * demuxer element. All those chains are connected through a multiqueue to - * the demuxer. A new group for the same demuxer is only created if the - * demuxer has signaled no-more pads, in which case all following pads - * create a new chain in the new group. - * - * This continues until the top-level decode chain is complete. A decode - * chain is complete if it either ends with a blocked endpad, if autoplugging - * stopped because no suitable plugins could be found or if the active group - * is complete. A decode group OTOH is complete if all child chains are complete. - * - * If this happens at some point, all endpads of all active groups are exposed. - * For this decodebin2 adds the endpads, signals no-more-pads and then unblocks - * them. Now playback starts. - * - * If one of the chains that end on a endpad receives EOS decodebin2 checks upwards - * via the parent pointers 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. - * - * 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! - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <gst/gst-i18n-plugin.h> - -#include <string.h> -#include <gst/gst.h> -#include <gst/pbutils/pbutils.h> - -#include "gstplay-marshal.h" -#include "gstplay-enum.h" -#include "gstfactorylists.h" -#include "gstrawcaps.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 _GstPendingPad GstPendingPad; -typedef struct _GstDecodeChain GstDecodeChain; -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 */ - gboolean use_buffering; /* configure buffering on multiqueues */ - gint low_percent; - gint high_percent; - guint max_size_bytes; - guint max_size_buffers; - guint64 max_size_time; - gboolean post_stream_topology; - - GstElement *typefind; /* this holds the typefind object */ - - GMutex *expose_lock; /* Protects exposal and removal of groups */ - GstDecodeChain *decode_chain; /* Top level decode chain */ - gint nbpads; /* unique identifier for source pads */ - - GMutex *factories_lock; - guint32 factories_cookie; /* Cookie from last time when factories was updated */ - GValueArray *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 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 -}; - -/* automatic sizes, while prerolling we buffer up to 2MB, we ignore time - * and buffers in this case. */ -#define AUTO_PREROLL_SIZE_BYTES 2 * 1024 * 1024 -#define AUTO_PREROLL_SIZE_BUFFERS 0 -#define AUTO_PREROLL_SIZE_TIME 0 - -/* whan playing, keep a max of 2MB of data but try to keep the number of buffers - * as low as possible (try to aim for 5 buffers) */ -#define AUTO_PLAY_SIZE_BYTES 2 * 1024 * 1024 -#define AUTO_PLAY_SIZE_BUFFERS 5 -#define AUTO_PLAY_SIZE_TIME 0 - -#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_MAX_SIZE_BYTES 0 -#define DEFAULT_MAX_SIZE_BUFFERS 0 -#define DEFAULT_MAX_SIZE_TIME 0 -#define DEFAULT_POST_STREAM_TOPOLOGY FALSE - -/* Properties */ -enum -{ - PROP_0, - PROP_CAPS, - PROP_SUBTITLE_ENCODING, - PROP_SINK_CAPS, - PROP_USE_BUFFERING, - PROP_LOW_PERCENT, - PROP_HIGH_PERCENT, - PROP_MAX_SIZE_BYTES, - PROP_MAX_SIZE_BUFFERS, - PROP_MAX_SIZE_TIME, - PROP_POST_STREAM_TOPOLOGY, - 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 <edward.hervey@collabora.co.uk>, " - "Sebastian Dröge <sebastian.droege@collabora.co.uk>"); - -static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS); - -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 void decodebin_set_queue_size (GstDecodeBin * dbin, - GstElement * multiqueue, gboolean preroll); - -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_cb (GstPad * pad, GParamSpec * unused, - GstDecodeChain * chain); - -static GstPad *find_sink_pad (GstElement * element); -static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element, - GstStateChange transition); - -#define EXPOSE_LOCK(dbin) G_STMT_START { \ - GST_LOG_OBJECT (dbin, \ - "expose locking from thread %p", \ - g_thread_self ()); \ - g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \ - GST_LOG_OBJECT (dbin, \ - "expose locked from thread %p", \ - g_thread_self ()); \ -} G_STMT_END - -#define EXPOSE_UNLOCK(dbin) G_STMT_START { \ - GST_LOG_OBJECT (dbin, \ - "expose unlocking from thread %p", \ - g_thread_self ()); \ - g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->expose_lock); \ -} G_STMT_END - -#define 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 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 - -#define SUBTITLE_LOCK(dbin) G_STMT_START { \ - GST_LOG_OBJECT (dbin, \ - "subtitle locking from thread %p", \ - g_thread_self ()); \ - g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \ - GST_LOG_OBJECT (dbin, \ - "subtitle lock from thread %p", \ - g_thread_self ()); \ -} G_STMT_END - -#define SUBTITLE_UNLOCK(dbin) G_STMT_START { \ - GST_LOG_OBJECT (dbin, \ - "subtitle unlocking from thread %p", \ - g_thread_self ()); \ - g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->subtitle_lock); \ -} G_STMT_END - -struct _GstPendingPad -{ - GstPad *pad; - GstDecodeChain *chain; - gulong event_probe_id; -}; - -/* GstDecodeGroup - * - * Streams belonging to the same group/chain of a media file - * - * When changing something here lock the parent chain! - */ -struct _GstDecodeGroup -{ - GstDecodeBin *dbin; - GstDecodeChain *parent; - - GstElement *multiqueue; /* Used for linking all child chains */ - gulong overrunsig; /* the overrun signal for multiqueue */ - - gboolean overrun; /* TRUE if the multiqueue signaled overrun. This - * means that we should really expose the group */ - - 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 GstDecodeChains in this group */ - - GList *reqpads; /* List of RequestPads for multiqueue, there is - * exactly one RequestPad per child chain */ -}; - -struct _GstDecodeChain -{ - GstDecodeGroup *parent; - GstDecodeBin *dbin; - - GMutex *lock; /* Protects this chain and its groups */ - - GstPad *pad; /* srcpad that caused creation of this chain */ - - gboolean demuxer; /* TRUE if elements->data is a demuxer */ - 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! */ - - GstDecodeGroup *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 */ - - GstDecodePad *endpad; /* Pad of this chain that could be exposed */ - gboolean deadend; /* This chain is incomplete and can't be completed, - e.g. no suitable decoder could be found - e.g. stream got EOS without buffers - */ - 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_decode_chain_free (GstDecodeChain * chain); -static GstDecodeChain *gst_decode_chain_new (GstDecodeBin * dbin, - GstDecodeGroup * group, GstPad * pad); -static void gst_decode_group_hide (GstDecodeGroup * group); -static void gst_decode_group_free (GstDecodeGroup * group); -static GstDecodeGroup *gst_decode_group_new (GstDecodeBin * dbin, - GstDecodeChain * chain); -static gboolean gst_decode_chain_is_complete (GstDecodeChain * chain); -static void gst_decode_chain_handle_eos (GstDecodeChain * chain); -static gboolean gst_decode_chain_expose (GstDecodeChain * chain, - GList ** endpads, gboolean * missing_plugin); -static gboolean gst_decode_chain_is_drained (GstDecodeChain * chain); -static gboolean gst_decode_group_is_complete (GstDecodeGroup * group); -static GstPad *gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, - GstPad * pad); -static gboolean gst_decode_group_is_drained (GstDecodeGroup * group); - -static gboolean gst_decode_bin_expose (GstDecodeBin * dbin); - -#define CHAIN_MUTEX_LOCK(chain) G_STMT_START { \ - GST_LOG_OBJECT (chain->dbin, \ - "locking chain %p from thread %p", \ - chain, g_thread_self ()); \ - g_mutex_lock (chain->lock); \ - GST_LOG_OBJECT (chain->dbin, \ - "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->dbin, \ - "unlocking chain %p from thread %p", \ - chain, g_thread_self ()); \ - g_mutex_unlock (chain->lock); \ -} G_STMT_END - -/* GstDecodePad - * - * GstPad private used for source pads of chains - */ -struct _GstDecodePad -{ - GstGhostPad parent; - GstDecodeBin *dbin; - GstDecodeChain *chain; - - gboolean blocked; /* the *target* pad is blocked */ - gboolean exposed; /* the pad is exposed */ - gboolean drained; /* an EOS has been seen on the pad */ -}; - -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, - GstDecodeChain * chain); -static void gst_decode_pad_activate (GstDecodePad * dpad, - GstDecodeChain * chain); -static void gst_decode_pad_unblock (GstDecodePad * dpad); -static void gst_decode_pad_set_blocked (GstDecodePad * dpad, gboolean blocked); - -static void gst_pending_pad_free (GstPendingPad * ppad); -static gboolean pad_event_cb (GstPad * pad, GstEvent * event, gpointer data); - -/******************************** - * 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; - - gobject_klass = (GObjectClass *) klass; - gstelement_klass = (GstElementClass *) klass; - - parent_class = g_type_class_peek_parent (klass); - - gobject_klass->dispose = gst_decode_bin_dispose; - gobject_klass->finalize = gst_decode_bin_finalize; - gobject_klass->set_property = gst_decode_bin_set_property; - gobject_klass->get_property = 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)); - - /** - * GstDecodeBin2::use-buffering - * - * Activate buffering in decodebin2. This will instruct the multiqueues behind - * decoders to emit BUFFERING messages. - - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_USE_BUFFERING, - g_param_spec_boolean ("use-buffering", "Use Buffering", - "Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds", - DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - /** - * GstDecodebin2:low-percent - * - * Low threshold percent for buffering to start. - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_LOW_PERCENT, - g_param_spec_int ("low-percent", "Low percent", - "Low threshold for buffering to start", 0, 100, - DEFAULT_LOW_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - /** - * GstDecodebin2:high-percent - * - * High threshold percent for buffering to finish. - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_HIGH_PERCENT, - g_param_spec_int ("high-percent", "High percent", - "High threshold for buffering to finish", 0, 100, - DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - /** - * GstDecodebin2:max-size-bytes - * - * Max amount amount of bytes in the queue (0=automatic). - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BYTES, - g_param_spec_uint ("max-size-bytes", "Max. size (bytes)", - "Max. amount of bytes in the queue (0=automatic)", - 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES, - G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - /** - * GstDecodebin2:max-size-buffers - * - * Max amount amount of buffers in the queue (0=automatic). - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_BUFFERS, - g_param_spec_uint ("max-size-buffers", "Max. size (buffers)", - "Max. number of buffers in the queue (0=automatic)", - 0, G_MAXUINT, DEFAULT_MAX_SIZE_BUFFERS, - G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - /** - * GstDecodebin2:max-size-time - * - * Max amount amount of time in the queue (in ns, 0=automatic). - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_MAX_SIZE_TIME, - g_param_spec_uint64 ("max-size-time", "Max. size (ns)", - "Max. amount of data in the queue (in ns, 0=automatic)", - 0, G_MAXUINT64, - DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - /** - * GstDecodeBin2::post-stream-topology - * - * Post stream-topology messages on the bus every time the topology changes. - * - * Since: 0.10.26 - */ - g_object_class_install_property (gobject_klass, PROP_POST_STREAM_TOPOLOGY, - g_param_spec_boolean ("post-stream-topology", "Post Stream Topology", - "Post stream-topology messages", - DEFAULT_POST_STREAM_TOPOLOGY, - 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); -} - -/* Must be called with factories lock! */ -static void -gst_decode_bin_update_factories_list (GstDecodeBin * dbin) -{ - if (!dbin->factories - || dbin->factories_cookie != - gst_default_registry_get_feature_list_cookie ()) { - if (dbin->factories) - g_value_array_free (dbin->factories); - dbin->factories = gst_factory_list_get_elements (GST_FACTORY_LIST_DECODER); - dbin->factories_cookie = gst_default_registry_get_feature_list_cookie (); - } -} - -static void -gst_decode_bin_init (GstDecodeBin * decode_bin) -{ - /* first filter out the interesting element factories */ - decode_bin->factories_lock = g_mutex_new (); - gst_decode_bin_update_factories_list (decode_bin); - - /* 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->expose_lock = g_mutex_new (); - decode_bin->decode_chain = NULL; - - decode_bin->dyn_lock = g_mutex_new (); - decode_bin->shutdown = FALSE; - decode_bin->blocked_pads = NULL; - - decode_bin->subtitle_lock = g_mutex_new (); - - decode_bin->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING); - decode_bin->caps = gst_static_caps_get (&default_raw_caps); - decode_bin->use_buffering = DEFAULT_USE_BUFFERING; - decode_bin->low_percent = DEFAULT_LOW_PERCENT; - decode_bin->high_percent = DEFAULT_HIGH_PERCENT; - - decode_bin->max_size_bytes = DEFAULT_MAX_SIZE_BYTES; - decode_bin->max_size_buffers = DEFAULT_MAX_SIZE_BUFFERS; - decode_bin->max_size_time = DEFAULT_MAX_SIZE_TIME; -} - -static void -gst_decode_bin_dispose (GObject * object) -{ - GstDecodeBin *decode_bin; - - decode_bin = GST_DECODE_BIN (object); - - if (decode_bin->factories) - g_value_array_free (decode_bin->factories); - decode_bin->factories = NULL; - - if (decode_bin->decode_chain) - gst_decode_chain_free (decode_bin->decode_chain); - decode_bin->decode_chain = 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->expose_lock) { - g_mutex_free (decode_bin->expose_lock); - decode_bin->expose_lock = NULL; - } - - if (decode_bin->dyn_lock) { - g_mutex_free (decode_bin->dyn_lock); - decode_bin->dyn_lock = NULL; - } - - if (decode_bin->subtitle_lock) { - g_mutex_free (decode_bin->subtitle_lock); - decode_bin->subtitle_lock = NULL; - } - - if (decode_bin->factories_lock) { - g_mutex_free (decode_bin->factories_lock); - decode_bin->factories_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); - gst_caps_replace (&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)); - - SUBTITLE_LOCK (dbin); - g_free (dbin->encoding); - dbin->encoding = g_strdup (encoding); - - /* 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); - } - SUBTITLE_UNLOCK (dbin); -} - -static gchar * -gst_decode_bin_get_subs_encoding (GstDecodeBin * dbin) -{ - gchar *encoding; - - GST_DEBUG_OBJECT (dbin, "Getting currently set encoding"); - - SUBTITLE_LOCK (dbin); - encoding = g_strdup (dbin->encoding); - SUBTITLE_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; - case PROP_USE_BUFFERING: - dbin->use_buffering = g_value_get_boolean (value); - break; - case PROP_LOW_PERCENT: - dbin->low_percent = g_value_get_int (value); - break; - case PROP_HIGH_PERCENT: - dbin->high_percent = g_value_get_int (value); - break; - case PROP_MAX_SIZE_BYTES: - dbin->max_size_bytes = g_value_get_uint (value); - break; - case PROP_MAX_SIZE_BUFFERS: - dbin->max_size_buffers = g_value_get_uint (value); - break; - case PROP_MAX_SIZE_TIME: - dbin->max_size_time = g_value_get_uint64 (value); - break; - case PROP_POST_STREAM_TOPOLOGY: - dbin->post_stream_topology = g_value_get_boolean (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; - case PROP_USE_BUFFERING: - g_value_set_boolean (value, dbin->use_buffering); - break; - case PROP_LOW_PERCENT: - g_value_set_int (value, dbin->low_percent); - break; - case PROP_HIGH_PERCENT: - g_value_set_int (value, dbin->high_percent); - break; - case PROP_MAX_SIZE_BYTES: - g_value_set_uint (value, dbin->max_size_bytes); - break; - case PROP_MAX_SIZE_BUFFERS: - g_value_set_uint (value, dbin->max_size_buffers); - break; - case PROP_MAX_SIZE_TIME: - g_value_set_uint64 (value, dbin->max_size_time); - break; - case PROP_POST_STREAM_TOPOLOGY: - g_value_set_boolean (value, dbin->post_stream_topology); - 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; - GstDecodeBin *dbin = GST_DECODE_BIN_CAST (element); - - GST_DEBUG_OBJECT (element, "finding factories"); - - /* return all compatible factories for caps */ - g_mutex_lock (dbin->factories_lock); - gst_decode_bin_update_factories_list (dbin); - result = gst_factory_list_filter (dbin->factories, caps); - g_mutex_unlock (dbin->factories_lock); - - 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, - GstDecodeChain * chain); -static gboolean connect_element (GstDecodeBin * dbin, GstElement * element, - GstDecodeChain * chain); -static void expose_pad (GstDecodeBin * dbin, GstElement * src, - GstDecodePad * dpad, GstPad * pad, GstCaps * caps, GstDecodeChain * chain); - -static void pad_added_cb (GstElement * element, GstPad * pad, - GstDecodeChain * chain); -static void pad_removed_cb (GstElement * element, GstPad * pad, - GstDecodeChain * chain); -static void no_more_pads_cb (GstElement * element, GstDecodeChain * chain); - -static GstDecodeGroup *gst_decode_chain_get_current_group (GstDecodeChain * - chain); - -/* 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, GstDecodeChain * chain) -{ - 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 (chain->elements && src != chain->elements->data) { - GST_ERROR_OBJECT (dbin, "New pad from not the last element in this chain"); - return; - } - - if (chain->endpad) { - GST_ERROR_OBJECT (dbin, "New pad in a chain that is already complete"); - return; - } - - if (chain->demuxer) { - GstDecodeGroup *group; - GstDecodeChain *oldchain = chain; - - CHAIN_MUTEX_LOCK (oldchain); - group = gst_decode_chain_get_current_group (chain); - if (group) { - chain = gst_decode_chain_new (dbin, group, pad); - group->children = g_list_prepend (group->children, chain); - } - CHAIN_MUTEX_UNLOCK (oldchain); - if (!group) { - GST_WARNING_OBJECT (dbin, "No current group"); - return; - } - } - - 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, chain); - - /* 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, chain); - - 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, caps, chain); - gst_object_unref (dpad); - return; - } -unknown_type: - { - GST_LOG_OBJECT (pad, "Unknown type, posting message and firing signal"); - - chain->deadend = TRUE; - chain->endcaps = gst_caps_ref (caps); - - gst_element_post_message (GST_ELEMENT_CAST (dbin), - gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps)); - - g_signal_emit (G_OBJECT (dbin), - gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps); - - /* Try to expose anything */ - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) { - gst_decode_bin_expose (dbin); - } - EXPOSE_UNLOCK (dbin); - do_async_done (dbin); - - if (src == dbin->typefind) { - gchar *desc; - - if (caps && !gst_caps_is_empty (caps)) { - 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); - } else { - GST_ELEMENT_ERROR (dbin, STREAM, TYPE_NOT_FOUND, - (_("Could not determine type of stream")), - ("Stream caps %" GST_PTR_FORMAT, 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: - { - GstPendingPad *ppad; - - /* connect to caps notification */ - CHAIN_MUTEX_LOCK (chain); - GST_LOG_OBJECT (dbin, "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_event_probe (pad, (GCallback) pad_event_cb, ppad); - chain->pending_pads = g_list_prepend (chain->pending_pads, ppad); - CHAIN_MUTEX_UNLOCK (chain); - g_signal_connect (G_OBJECT (pad), "notify::caps", - G_CALLBACK (caps_notify_cb), chain); - 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, - GstDecodeChain * chain) -{ - gboolean res = FALSE; - GstPad *mqpad = NULL; - gboolean is_demuxer = chain->parent && !chain->elements; /* First pad after the demuxer */ - - 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 , chain:%p", - GST_DEBUG_PAD_NAME (pad), chain); - - /* 1. is element demuxer or parser */ - if (is_demuxer) { - GST_LOG_OBJECT (src, - "is a demuxer, connecting the pad through multiqueue '%s'", - GST_OBJECT_NAME (chain->parent->multiqueue)); - - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL); - if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad))) - goto beach; - src = chain->parent->multiqueue; - pad = mqpad; - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (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; - - /* Set dpad target to pad again, it might've been unset - * below but we came back here because something failed - */ - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), 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); - - /* 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, caps, chain); - 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_CAST (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)); - - CHAIN_MUTEX_LOCK (chain); - chain->elements = - g_list_prepend (chain->elements, gst_object_ref (element)); - chain->demuxer = is_demuxer_element (element); - CHAIN_MUTEX_UNLOCK (chain); - - /* link this element further */ - connect_element (dbin, element, chain); - - /* try to configure the subtitle encoding property when we can */ - if (g_object_class_find_property (G_OBJECT_GET_CLASS (element), - "subtitle-encoding")) { - SUBTITLE_LOCK (dbin); - GST_DEBUG_OBJECT (dbin, - "setting subtitle-encoding=%s to element", dbin->encoding); - g_object_set (G_OBJECT (element), "subtitle-encoding", dbin->encoding, - NULL); - SUBTITLE_UNLOCK (dbin); - 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) { - GstElement *tmp = NULL; - - GST_WARNING_OBJECT (dbin, "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 { - tmp = chain->elements->data; - gst_element_set_state (tmp, GST_STATE_NULL); - gst_bin_remove (GST_BIN (dbin), tmp); - chain->elements = g_list_delete_link (chain->elements, chain->elements); - } while (tmp != element); - CHAIN_MUTEX_UNLOCK (chain); - - continue; - } - if (subtitle) { - SUBTITLE_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); - SUBTITLE_UNLOCK (dbin); - } - - res = TRUE; - break; - } - -beach: - if (mqpad) - gst_object_unref (mqpad); - - return res; -} - -static gboolean -connect_element (GstDecodeBin * dbin, GstElement * element, - GstDecodeChain * chain) -{ - GList *pads; - gboolean res = TRUE; - gboolean dynamic = FALSE; - GList *to_connect = NULL; - - GST_DEBUG_OBJECT (dbin, "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 (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 relevant signals */ - if (dynamic) { - GST_LOG_OBJECT (dbin, "Adding signals to element %s in chain %p", - GST_ELEMENT_NAME (element), chain); - g_signal_connect (G_OBJECT (element), "pad-added", - G_CALLBACK (pad_added_cb), chain); - g_signal_connect (G_OBJECT (element), "pad-removed", - G_CALLBACK (pad_removed_cb), chain); - g_signal_connect (G_OBJECT (element), "no-more-pads", - G_CALLBACK (no_more_pads_cb), chain); - } - - /* 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_reffed (pad); - analyze_new_pad (dbin, element, pad, caps, chain); - 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 chain as a decoded pad. - */ -static void -expose_pad (GstDecodeBin * dbin, GstElement * src, GstDecodePad * dpad, - GstPad * pad, GstCaps * caps, GstDecodeChain * chain) -{ - GstPad *mqpad = NULL; - - GST_DEBUG_OBJECT (dbin, "pad %s:%s, chain:%p", - GST_DEBUG_PAD_NAME (pad), chain); - - /* If this is the first pad for this chain, there are no other elements - * and the source element is not the multiqueue we must link through the - * multiqueue. - * - * This is the case if a demuxer directly exposed a raw pad. - */ - if (chain->parent && !chain->elements && src != chain->parent->multiqueue) { - GST_LOG_OBJECT (src, "connecting the pad through multiqueue"); - - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), NULL); - if (!(mqpad = gst_decode_group_control_demuxer_pad (chain->parent, pad))) - goto beach; - pad = mqpad; - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad); - } - - gst_decode_pad_activate (dpad, chain); - chain->endpad = gst_object_ref (dpad); - chain->endcaps = gst_caps_ref (caps); - - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) { - gst_decode_bin_expose (dbin); - } - EXPOSE_UNLOCK (dbin); - - 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; - } - - /* FIXME: we can only deal with one type, we don't yet support dynamically changing - * caps from the typefind element */ - if (decode_bin->have_type || decode_bin->decode_chain) - goto exit; - - decode_bin->have_type = TRUE; - - pad = gst_element_get_static_pad (typefind, "src"); - - decode_bin->decode_chain = gst_decode_chain_new (decode_bin, NULL, pad); - analyze_new_pad (decode_bin, typefind, pad, caps, decode_bin->decode_chain); - - gst_object_unref (pad); - -exit: - return; -} - -static gboolean -pad_event_cb (GstPad * pad, GstEvent * event, gpointer data) -{ - GstPendingPad *ppad = (GstPendingPad *) data; - GstDecodeChain *chain = ppad->chain; - GstDecodeBin *dbin = chain->dbin; - - g_assert (ppad); - g_assert (chain); - g_assert (dbin); - switch (GST_EVENT_TYPE (event)) { - case GST_EVENT_EOS: - GST_DEBUG_OBJECT (dbin, "Received EOS on a non final pad, this stream " - "ended too early"); - chain->deadend = TRUE; - /* we don't set the endcaps because NULL endcaps means early EOS */ - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) - gst_decode_bin_expose (dbin); - EXPOSE_UNLOCK (dbin); - break; - default: - break; - } - return TRUE; -} - -static void -pad_added_cb (GstElement * element, GstPad * pad, GstDecodeChain * chain) -{ - GstCaps *caps; - GstDecodeBin *dbin; - - dbin = chain->dbin; - - GST_DEBUG_OBJECT (pad, "pad added, chain:%p", chain); - - caps = gst_pad_get_caps_reffed (pad); - analyze_new_pad (dbin, element, pad, caps, chain); - if (caps) - gst_caps_unref (caps); - - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) { - GST_LOG_OBJECT (dbin, - "That was the last dynamic object, now attempting to expose the group"); - if (!gst_decode_bin_expose (dbin)) - GST_WARNING_OBJECT (dbin, "Couldn't expose group"); - } - EXPOSE_UNLOCK (dbin); -} - -static void -pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeChain * 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) { - g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain); - 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, GstDecodeChain * chain) -{ - GstDecodeGroup *group = NULL; - - GST_LOG_OBJECT (element, "got no more pads"); - - CHAIN_MUTEX_LOCK (chain); - if (!chain->elements || (GstElement *) chain->elements->data != element) { - GST_LOG_OBJECT (chain->dbin, "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->dbin, "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) { - group = chain->next_groups->data; - } - if (!group) { - GST_ERROR_OBJECT (chain->dbin, "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; - /* this group has prerolled enough to not need more pads, - * we can probably set its buffering state to playing now */ - GST_DEBUG_OBJECT (group->dbin, "Setting group %p multiqueue to " - "'playing' buffering mode", group); - decodebin_set_queue_size (group->dbin, group->multiqueue, FALSE); - CHAIN_MUTEX_UNLOCK (chain); - - EXPOSE_LOCK (chain->dbin); - if (gst_decode_chain_is_complete (chain->dbin->decode_chain)) { - gst_decode_bin_expose (chain->dbin); - } - EXPOSE_UNLOCK (chain->dbin); -} - -static void -caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeChain * 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 */ - g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain); - - 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_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 = 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) -{ - gboolean res; - - GST_LOG_OBJECT (dbin, "Checking with caps %" GST_PTR_FORMAT, caps); - - /* lock for getting the caps */ - GST_OBJECT_LOCK (dbin); - res = gst_caps_can_intersect (dbin->caps, caps); - GST_OBJECT_UNLOCK (dbin); - - GST_LOG_OBJECT (dbin, "Caps are %sfinal caps", res ? "" : "not "); - - return res; -} - -/**** - * GstDecodeChain functions - ****/ - -/* gst_decode_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 GstDecodeGroup * -gst_decode_chain_get_current_group (GstDecodeChain * chain) -{ - GstDecodeGroup *group; - - if (!chain->next_groups && chain->active_group - && chain->active_group->overrun && !chain->active_group->no_more_pads) { - GST_WARNING_OBJECT (chain->dbin, - "Currently active group %p is exposed" - " and wants to add a new pad without having signaled no-more-pads", - chain->active_group); - return NULL; - } - - if (chain->next_groups && (group = chain->next_groups->data) && group->overrun - && !group->no_more_pads) { - GST_WARNING_OBJECT (chain->dbin, - "Currently newest pending group %p " - "had overflow but didn't signal no-more-pads", group); - return NULL; - } - - /* Now we know that we can really return something useful */ - if (!chain->active_group) { - chain->active_group = group = gst_decode_group_new (chain->dbin, chain); - } else if (!chain->active_group->overrun - && !chain->active_group->no_more_pads) { - group = chain->active_group; - } else if (chain->next_groups && (group = chain->next_groups->data) - && !group->overrun && !group->no_more_pads) { - /* group = chain->next_groups->data */ - } else { - group = gst_decode_group_new (chain->dbin, chain); - chain->next_groups = g_list_prepend (chain->next_groups, group); - } - - return group; -} - -static void gst_decode_group_free_internal (GstDecodeGroup * group, - gboolean hide); - -static void -gst_decode_chain_free_internal (GstDecodeChain * chain, gboolean hide) -{ - GList *l; - - CHAIN_MUTEX_LOCK (chain); - - GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hiding" : "Freeing"), - chain); - - if (chain->active_group) { - gst_decode_group_free_internal (chain->active_group, hide); - if (!hide) - chain->active_group = NULL; - } - - for (l = chain->next_groups; l; l = l->next) { - gst_decode_group_free_internal ((GstDecodeGroup *) 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) { - GstDecodeGroup *group = l->data; - - gst_decode_group_free (group); - } - g_list_free (chain->old_groups); - chain->old_groups = NULL; - } - - for (l = chain->pending_pads; l; l = l->next) { - GstPendingPad *ppad = l->data; - GstPad *pad = ppad->pad; - - g_signal_handlers_disconnect_by_func (pad, caps_notify_cb, chain); - 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) { - GstElement *element = GST_ELEMENT (l->data); - - g_signal_handlers_disconnect_by_func (element, pad_added_cb, chain); - g_signal_handlers_disconnect_by_func (element, pad_removed_cb, chain); - g_signal_handlers_disconnect_by_func (element, no_more_pads_cb, chain); - - if (GST_OBJECT_PARENT (element) == GST_OBJECT_CAST (chain->dbin)) - gst_bin_remove (GST_BIN_CAST (chain->dbin), element); - if (!hide) { - gst_element_set_state (element, GST_STATE_NULL); - } - - SUBTITLE_LOCK (chain->dbin); - /* remove possible subtitle element */ - chain->dbin->subtitles = g_list_remove (chain->dbin->subtitles, element); - SUBTITLE_UNLOCK (chain->dbin); - - if (!hide) { - gst_object_unref (element); - l->data = NULL; - } - } - if (!hide) { - g_list_free (chain->elements); - chain->elements = NULL; - } - - if (chain->endpad) { - if (chain->endpad->exposed) - gst_element_remove_pad (GST_ELEMENT_CAST (chain->dbin), - GST_PAD_CAST (chain->endpad)); - - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->endpad), NULL); - chain->endpad->exposed = FALSE; - if (!hide) { - gst_object_unref (chain->endpad); - chain->endpad = NULL; - } - } - - if (chain->pad) { - gst_object_unref (chain->pad); - chain->pad = NULL; - } - - if (chain->endcaps) { - gst_caps_unref (chain->endcaps); - chain->endcaps = NULL; - } - - GST_DEBUG_OBJECT (chain->dbin, "%s chain %p", (hide ? "Hidden" : "Freed"), - chain); - CHAIN_MUTEX_UNLOCK (chain); - if (!hide) { - g_mutex_free (chain->lock); - g_slice_free (GstDecodeChain, chain); - } -} - -/* gst_decode_chain_free: - * - * Completely frees and removes the chain and all - * child groups from decodebin2. - * - * MT-safe, don't hold the chain lock or any child chain's lock - * when calling this! - */ -static void -gst_decode_chain_free (GstDecodeChain * chain) -{ - gst_decode_chain_free_internal (chain, FALSE); -} - -/* gst_decode_chain_new: - * - * Creates a new decode chain and initializes it. - * - * It's up to the caller to add it to the list of child chains of - * a group! - */ -static GstDecodeChain * -gst_decode_chain_new (GstDecodeBin * dbin, GstDecodeGroup * parent, - GstPad * pad) -{ - GstDecodeChain *chain = g_slice_new0 (GstDecodeChain); - - GST_DEBUG_OBJECT (dbin, "Creating new chain %p with parent group %p", chain, - parent); - - chain->dbin = dbin; - chain->parent = parent; - chain->lock = g_mutex_new (); - chain->pad = gst_object_ref (pad); - - return chain; -} - -/**** - * 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; - - dbin = group->dbin; - - GST_LOG_OBJECT (dbin, "multiqueue '%s' (%p) is full", GST_OBJECT_NAME (queue), - queue); - - group->overrun = TRUE; - - /* FIXME: We should make sure that everything gets exposed now - * even if child chains are not complete because the will never - * be complete! Ignore any non-complete chains when exposing - * and never expose them later - */ - - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) { - if (!gst_decode_bin_expose (dbin)) - GST_WARNING_OBJECT (dbin, "Couldn't expose group"); - } - EXPOSE_UNLOCK (group->dbin); -} - -static void -gst_decode_group_free_internal (GstDecodeGroup * group, gboolean hide) -{ - GList *l; - - GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hiding" : "Freeing"), - group); - for (l = group->children; l; l = l->next) { - GstDecodeChain *chain = (GstDecodeChain *) l->data; - - gst_decode_chain_free_internal (chain, hide); - if (!hide) - l->data = NULL; - } - if (!hide) { - g_list_free (group->children); - group->children = NULL; - } - - if (!hide) { - for (l = group->reqpads; l; l = l->next) { - GstPad *pad = l->data; - - gst_element_release_request_pad (group->multiqueue, pad); - gst_object_unref (pad); - l->data = NULL; - } - g_list_free (group->reqpads); - group->reqpads = NULL; - } - - if (group->multiqueue) { - if (group->overrunsig) { - g_signal_handler_disconnect (group->multiqueue, group->overrunsig); - group->overrunsig = 0; - } - - if (GST_OBJECT_PARENT (group->multiqueue) == GST_OBJECT_CAST (group->dbin)) - gst_bin_remove (GST_BIN_CAST (group->dbin), group->multiqueue); - if (!hide) { - gst_element_set_state (group->multiqueue, GST_STATE_NULL); - gst_object_unref (group->multiqueue); - group->multiqueue = NULL; - } - } - - GST_DEBUG_OBJECT (group->dbin, "%s group %p", (hide ? "Hided" : "Freed"), - group); - if (!hide) - g_slice_free (GstDecodeGroup, group); -} - -/* gst_decode_group_free: - * - * Completely frees and removes the decode 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_decode_group_free (GstDecodeGroup * group) -{ - gst_decode_group_free_internal (group, FALSE); -} - -/* gst_decode_group_hide: - * - * Hide the decode group only, this means that - * all child endpads are removed from decodebin2 - * 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_decode_group_hide (GstDecodeGroup * group) -{ - gst_decode_group_free_internal (group, TRUE); -} - -/* configure queue sizes, this depends on the buffering method and if we are - * playing or prerolling. */ -static void -decodebin_set_queue_size (GstDecodeBin * dbin, GstElement * multiqueue, - gboolean preroll) -{ - guint max_bytes, max_buffers; - guint64 max_time; - - if (preroll || dbin->use_buffering) { - /* takes queue limits, initially we only queue up up to the max bytes limit, - * with a default of 2MB. we use the same values for buffering mode. */ - if ((max_bytes = dbin->max_size_bytes) == 0) - max_bytes = AUTO_PREROLL_SIZE_BYTES; - if ((max_buffers = dbin->max_size_buffers) == 0) - max_buffers = AUTO_PREROLL_SIZE_BUFFERS; - if ((max_time = dbin->max_size_time) == 0) - max_time = AUTO_PREROLL_SIZE_TIME; - } else { - /* 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). */ - if ((max_bytes = dbin->max_size_bytes) == 0) - max_bytes = AUTO_PLAY_SIZE_BYTES; - if ((max_buffers = dbin->max_size_buffers) == 0) - max_buffers = AUTO_PLAY_SIZE_BUFFERS; - if ((max_time = dbin->max_size_time) == 0) - max_time = AUTO_PLAY_SIZE_TIME; - } - - g_object_set (multiqueue, - "max-size-bytes", max_bytes, "max-size-time", max_time, - "max-size-buffers", max_buffers, NULL); -} - -/* gst_decode_group_new: - * @dbin: Parent decodebin - * @parent: Parent chain or %NULL - * - * 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, GstDecodeChain * parent) -{ - GstDecodeGroup *group = g_slice_new0 (GstDecodeGroup); - GstElement *mq; - - GST_DEBUG_OBJECT (dbin, "Creating new group %p with parent chain %p", group, - parent); - - group->dbin = dbin; - group->parent = parent; - - mq = group->multiqueue = gst_element_factory_make ("multiqueue", NULL); - if (G_UNLIKELY (!group->multiqueue)) - goto missing_multiqueue; - - g_object_set (mq, "use-buffering", dbin->use_buffering, NULL); - if (dbin->use_buffering) { - g_object_set (mq, "low-percent", dbin->low_percent, NULL); - g_object_set (mq, "high-percent", dbin->high_percent, NULL); - } - - /* configure queue sizes for preroll */ - decodebin_set_queue_size (dbin, mq, TRUE); - - group->overrunsig = g_signal_connect (G_OBJECT (mq), "overrun", - G_CALLBACK (multi_queue_overrun_cb), group); - - gst_bin_add (GST_BIN (dbin), gst_object_ref (mq)); - gst_element_set_state (mq, GST_STATE_PAUSED); - - return group; - - /* ERRORS */ -missing_multiqueue: - { - gst_element_post_message (GST_ELEMENT_CAST (dbin), - gst_missing_element_message_new (GST_ELEMENT_CAST (dbin), - "multiqueue")); - GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no multiqueue!")); - g_slice_free (GstDecodeGroup, group); - return NULL; - } -} - -/* 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) -{ - GstDecodeBin *dbin; - GstPad *srcpad, *sinkpad; - GstIterator *it = NULL; - - dbin = group->dbin; - - GST_LOG_OBJECT (dbin, "group:%p pad %s:%s", group, GST_DEBUG_PAD_NAME (pad)); - - srcpad = NULL; - - if (G_UNLIKELY (!group->multiqueue)) - return NULL; - - if (!(sinkpad = gst_element_get_request_pad (group->multiqueue, "sink%d"))) { - GST_ERROR_OBJECT (dbin, "Couldn't get sinkpad from multiqueue"); - return NULL; - } - - if ((gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)) { - GST_ERROR_OBJECT (dbin, "Couldn't link demuxer and multiqueue"); - goto error; - } - - it = gst_pad_iterate_internal_links (sinkpad); - - if (!it || (gst_iterator_next (it, (gpointer) & srcpad)) != GST_ITERATOR_OK - || srcpad == NULL) { - GST_ERROR_OBJECT (dbin, - "Couldn't get srcpad from multiqueue for sinkpad %" GST_PTR_FORMAT, - sinkpad); - goto error; - } - - CHAIN_MUTEX_LOCK (group->parent); - group->reqpads = g_list_prepend (group->reqpads, gst_object_ref (sinkpad)); - CHAIN_MUTEX_UNLOCK (group->parent); - -beach: - if (it) - gst_iterator_free (it); - gst_object_unref (sinkpad); - return srcpad; - -error: - gst_element_release_request_pad (group->multiqueue, sinkpad); - goto beach; -} - -/* gst_decode_group_is_complete: - * - * Checks if the group is complete, this means that - * a) overrun of the multiqueue or no-more-pads happened - * b) all child chains are complete - * - * Not MT-safe, always call with decodebin expose lock - */ -static gboolean -gst_decode_group_is_complete (GstDecodeGroup * group) -{ - GList *l; - gboolean complete = TRUE; - - if (!group->overrun && !group->no_more_pads) { - complete = FALSE; - goto out; - } - - for (l = group->children; l; l = l->next) { - GstDecodeChain *chain = l->data; - - if (!gst_decode_chain_is_complete (chain)) { - complete = FALSE; - goto out; - } - } - -out: - GST_DEBUG_OBJECT (group->dbin, "Group %p is complete: %d", group, complete); - return complete; -} - -/* gst_decode_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 - * - * Not MT-safe, always call with decodebin expose lock - */ -static gboolean -gst_decode_chain_is_complete (GstDecodeChain * chain) -{ - gboolean complete = FALSE; - - CHAIN_MUTEX_LOCK (chain); - 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_decode_group_is_complete (chain->active_group)) { - complete = TRUE; - goto out; - } - } - -out: - CHAIN_MUTEX_UNLOCK (chain); - GST_DEBUG_OBJECT (chain->dbin, "Chain %p is complete: %d", chain, complete); - return complete; -} - -/* check if the group is drained, meaning all pads have seen an EOS - * event. */ -static void -gst_decode_pad_handle_eos (GstDecodePad * pad) -{ - GstDecodeChain *chain = pad->chain; - - GST_LOG_OBJECT (pad->dbin, "chain : %p, pad %p", chain, pad); - pad->drained = TRUE; - gst_decode_chain_handle_eos (chain); -} - -/* gst_decode_chain_handle_eos: - * - * Checks if there are next groups in any parent chain - * to which we can switch or if everything is drained. - * - * If there are groups to switch to, hide the current active - * one and expose the new one. - * - * MT-safe, don't call with chain lock! - */ -static void -gst_decode_chain_handle_eos (GstDecodeChain * eos_chain) -{ - GstDecodeBin *dbin = eos_chain->dbin; - GstDecodeGroup *group = eos_chain->parent; - GstDecodeChain *chain = eos_chain; - gboolean drained; - - g_return_if_fail (eos_chain->endpad); - - CHAIN_MUTEX_LOCK (chain); - while ((group = chain->parent)) { - CHAIN_MUTEX_UNLOCK (chain); - chain = group->parent; - CHAIN_MUTEX_LOCK (chain); - - if (gst_decode_group_is_drained (group)) { - continue; - } - break; - } - - drained = chain->active_group ? - gst_decode_group_is_drained (chain->active_group) : TRUE; - - /* Now either group == NULL and chain == dbin->decode_chain - * or chain is the lowest chain that has a non-drained group */ - if (chain->active_group && drained && chain->next_groups) { - GST_DEBUG_OBJECT (dbin, "Hiding current group %p", chain->active_group); - gst_decode_group_hide (chain->active_group); - chain->old_groups = g_list_prepend (chain->old_groups, chain->active_group); - GST_DEBUG_OBJECT (dbin, "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); - CHAIN_MUTEX_UNLOCK (chain); - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) - gst_decode_bin_expose (dbin); - EXPOSE_UNLOCK (dbin); - } else if (!chain->active_group || drained) { - g_assert (chain == dbin->decode_chain); - CHAIN_MUTEX_UNLOCK (chain); - - GST_LOG_OBJECT (dbin, "all groups drained, fire signal"); - g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_DRAINED], 0, - NULL); - } else { - CHAIN_MUTEX_UNLOCK (chain); - GST_DEBUG_OBJECT (dbin, - "Current active group in chain %p is not drained yet", chain); - } -} - -/* gst_decode_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_decode_group_is_drained (GstDecodeGroup * group) -{ - GList *l; - gboolean drained = TRUE; - - if (group->drained) { - drained = TRUE; - goto out; - } - - for (l = group->children; l; l = l->next) { - GstDecodeChain *chain = l->data; - - CHAIN_MUTEX_LOCK (chain); - if (!gst_decode_chain_is_drained (chain)) - drained = FALSE; - CHAIN_MUTEX_UNLOCK (chain); - if (!drained) - goto out; - } - group->drained = drained; - -out: - GST_DEBUG_OBJECT (group->dbin, "Group %p is drained: %d", group, drained); - return drained; -} - -/* gst_decode_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_decode_chain_is_drained (GstDecodeChain * 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_decode_group_is_drained (chain->active_group) - && !chain->next_groups) { - drained = TRUE; - goto out; - } - -out: - GST_DEBUG_OBJECT (chain->dbin, "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 a<b, 0 if a==b, positive if a>b - */ -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_reffed (GST_PAD_CAST (da)); - capsb = gst_pad_get_caps_reffed (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, "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; -} - -static GstCaps * -_gst_element_get_linked_caps (GstElement * src, GstElement * sink) -{ - GstIterator *it; - GstElement *parent; - GstPad *pad, *peer; - gboolean done = FALSE; - GstCaps *caps = NULL; - - it = gst_element_iterate_src_pads (src); - while (!done) { - switch (gst_iterator_next (it, (gpointer) & pad)) { - case GST_ITERATOR_OK: - peer = gst_pad_get_peer (pad); - if (peer) { - parent = gst_pad_get_parent_element (peer); - if (parent == sink) { - caps = gst_pad_get_negotiated_caps (pad); - done = TRUE; - } - - if (parent) - gst_object_unref (parent); - gst_object_unref (peer); - } - gst_object_unref (pad); - break; - case GST_ITERATOR_RESYNC: - gst_iterator_resync (it); - break; - case GST_ITERATOR_ERROR: - case GST_ITERATOR_DONE: - done = TRUE; - break; - } - } - - gst_iterator_free (it); - - return caps; -} - -static GQuark topology_structure_name = 0; -static GQuark topology_caps = 0; -static GQuark topology_next = 0; -static GQuark topology_pad = 0; - -/* FIXME: Invent gst_structure_take_structure() to prevent all the - * structure copying for nothing - */ -static GstStructure * -gst_decode_chain_get_topology (GstDecodeChain * chain) -{ - GstStructure *s, *u; - GList *l; - GstCaps *caps; - - u = gst_structure_id_empty_new (topology_structure_name); - - /* Now at the last element */ - if (chain->elements && (chain->endpad || chain->deadend)) { - s = gst_structure_id_empty_new (topology_structure_name); - gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, chain->endcaps, - NULL); - - if (chain->endpad) - gst_structure_id_set (u, topology_pad, GST_TYPE_PAD, chain->endpad, NULL); - gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL); - gst_structure_free (u); - u = s; - } else if (chain->active_group) { - GValue list = { 0, }; - GValue item = { 0, }; - - g_value_init (&list, GST_TYPE_LIST); - g_value_init (&item, GST_TYPE_STRUCTURE); - for (l = chain->active_group->children; l; l = l->next) { - s = gst_decode_chain_get_topology (l->data); - gst_value_set_structure (&item, s); - gst_value_list_append_value (&list, &item); - g_value_reset (&item); - gst_structure_free (s); - } - gst_structure_id_set_value (u, topology_next, &list); - g_value_unset (&list); - g_value_unset (&item); - } - - /* Get caps between all elements in this chain */ - l = (chain->elements && chain->elements->next) ? chain->elements : NULL; - for (; l && l->next; l = l->next) { - GstCaps *caps = _gst_element_get_linked_caps (l->next->data, l->data); - - s = gst_structure_id_empty_new (topology_structure_name); - gst_structure_id_set (u, topology_caps, GST_TYPE_CAPS, caps, NULL); - gst_caps_unref (caps); - - gst_structure_id_set (s, topology_next, GST_TYPE_STRUCTURE, u, NULL); - gst_structure_free (u); - u = s; - } - - /* Caps that resulted in this chain */ - caps = gst_pad_get_negotiated_caps (chain->pad); - if (!caps) { - caps = gst_pad_get_caps_reffed (chain->pad); - if (G_UNLIKELY (!gst_caps_is_fixed (caps))) { - GST_ERROR_OBJECT (chain->pad, - "Couldn't get fixed caps, got %" GST_PTR_FORMAT, caps); - gst_caps_unref (caps); - caps = NULL; - } - } - gst_structure_set (u, "caps", GST_TYPE_CAPS, caps, NULL); - gst_caps_unref (caps); - - return u; -} - -static void -gst_decode_bin_post_topology_message (GstDecodeBin * dbin) -{ - GstStructure *s; - GstMessage *msg; - - s = gst_decode_chain_get_topology (dbin->decode_chain); - - msg = gst_message_new_element (GST_OBJECT (dbin), s); - gst_element_post_message (GST_ELEMENT (dbin), msg); -} - -/* Must only be called if the toplevel chain is complete and blocked! */ -/* Not MT-safe, call with decodebin expose lock! */ -static gboolean -gst_decode_bin_expose (GstDecodeBin * dbin) -{ - GList *tmp, *endpads = NULL; - gboolean missing_plugin = FALSE; - gboolean already_exposed = TRUE; - - GST_DEBUG_OBJECT (dbin, "Exposing currently active chains/groups"); - - /* Don't expose if we're currently shutting down */ - DYN_LOCK (dbin); - if (G_UNLIKELY (dbin->shutdown == TRUE)) { - GST_WARNING_OBJECT (dbin, "Currently, shutting down, aborting exposing"); - DYN_UNLOCK (dbin); - return FALSE; - } - DYN_UNLOCK (dbin); - - /* Get the pads that we're going to expose and mark things as exposed */ - if (!gst_decode_chain_expose (dbin->decode_chain, &endpads, &missing_plugin)) { - g_list_foreach (endpads, (GFunc) gst_object_unref, NULL); - g_list_free (endpads); - GST_ERROR_OBJECT (dbin, "Broken chain/group tree"); - g_return_val_if_reached (FALSE); - return FALSE; - } - if (endpads == NULL) { - if (missing_plugin) { - GST_WARNING_OBJECT (dbin, "No suitable plugins found"); - GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), - ("no suitable plugins found")); - } else { - /* in this case, the stream ended without buffers, - * just post a warning */ - GST_WARNING_OBJECT (dbin, "All streams finished without buffers"); - GST_ELEMENT_ERROR (dbin, STREAM, FAILED, (NULL), - ("all streams without buffers")); - } - return FALSE; - } - - /* Check if this was called when everything was exposed already */ - for (tmp = endpads; tmp && already_exposed; tmp = tmp->next) { - GstDecodePad *dpad = tmp->data; - - already_exposed &= dpad->exposed; - if (!already_exposed) - break; - } - if (already_exposed) { - GST_DEBUG_OBJECT (dbin, "Everything was exposed already!"); - g_list_foreach (endpads, (GFunc) gst_object_unref, NULL); - g_list_free (endpads); - return TRUE; - } - - /* Set all already exposed pads to blocked */ - for (tmp = endpads; tmp; tmp = tmp->next) { - GstDecodePad *dpad = tmp->data; - - if (dpad->exposed) { - GST_DEBUG_OBJECT (dpad, "blocking exposed pad"); - gst_decode_pad_set_blocked (dpad, 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) { - GstDecodePad *dpad = (GstDecodePad *) tmp->data; - gchar *padname; - - /* 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 (!dpad->exposed - && !gst_element_add_pad (GST_ELEMENT (dbin), GST_PAD_CAST (dpad))) { - /* not really fatal, we can try to add the other pads */ - g_warning ("error adding pad to decodebin2"); - continue; - } - dpad->exposed = 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, - (tmp->next == NULL)); - GST_DEBUG_OBJECT (dbin, "emitted new-decoded-pad"); - } - - /* 4. 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)); - - /* 5. Send a custom element message with the stream topology */ - if (dbin->post_stream_topology) - gst_decode_bin_post_topology_message (dbin); - - /* 6. Unblock internal pads. The application should have connected stuff now - * so that streaming can continue. */ - for (tmp = endpads; tmp; tmp = tmp->next) { - GstDecodePad *dpad = (GstDecodePad *) tmp->data; - - GST_DEBUG_OBJECT (dpad, "unblocking"); - gst_decode_pad_unblock (dpad); - GST_DEBUG_OBJECT (dpad, "unblocked"); - gst_object_unref (dpad); - } - g_list_free (endpads); - - do_async_done (dbin); - GST_DEBUG_OBJECT (dbin, "Exposed everything"); - return TRUE; -} - -/* gst_decode_chain_expose: - * - * Check if the chain can be exposed and add all endpads - * to the endpads list. - * - * Also update the active group's multiqueue to the - * runtime limits. - * - * Not MT-safe, call with decodebin expose lock! * - */ -static gboolean -gst_decode_chain_expose (GstDecodeChain * chain, GList ** endpads, - gboolean * missing_plugin) -{ - GstDecodeGroup *group; - GList *l; - GstDecodeBin *dbin; - - if (chain->deadend) { - if (chain->endcaps) - *missing_plugin = TRUE; - return TRUE; - } - - if (chain->endpad) { - if (!chain->endpad->blocked && !chain->endpad->exposed) - return FALSE; - *endpads = g_list_prepend (*endpads, gst_object_ref (chain->endpad)); - return TRUE; - } - - group = chain->active_group; - if (!group) - return FALSE; - if (!group->no_more_pads && !group->overrun) - return FALSE; - - dbin = group->dbin; - - /* configure queues for playback */ - decodebin_set_queue_size (dbin, group->multiqueue, FALSE); - - /* we can now disconnect any overrun signal, which is used to expose the - * group. */ - if (group->overrunsig) { - GST_LOG_OBJECT (dbin, "Disconnecting overrun"); - g_signal_handler_disconnect (group->multiqueue, group->overrunsig); - group->overrunsig = 0; - } - - for (l = group->children; l; l = l->next) { - GstDecodeChain *childchain = l->data; - - if (!gst_decode_chain_expose (childchain, endpads, missing_plugin)) - return FALSE; - } - - return TRUE; -} - -/************************* - * GstDecodePad functions - *************************/ - -static void -gst_decode_pad_class_init (GstDecodePadClass * klass) -{ -} - -static void -gst_decode_pad_init (GstDecodePad * pad) -{ - pad->chain = NULL; - pad->blocked = FALSE; - pad->exposed = FALSE; - pad->drained = FALSE; - gst_object_ref (pad); - gst_object_sink (pad); -} - -static void -source_pad_blocked_cb (GstPad * pad, gboolean blocked, GstDecodePad * dpad) -{ - GstDecodeChain *chain; - GstDecodeBin *dbin; - - chain = dpad->chain; - dbin = chain->dbin; - - GST_LOG_OBJECT (dpad, "blocked:%d, dpad->chain:%p", blocked, chain); - - dpad->blocked = blocked; - - if (dpad->blocked) { - EXPOSE_LOCK (dbin); - if (gst_decode_chain_is_complete (dbin->decode_chain)) { - if (!gst_decode_bin_expose (dbin)) - GST_WARNING_OBJECT (dbin, "Couldn't expose group"); - } - EXPOSE_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; - GstPad *opad; - - DYN_LOCK (dbin); - - GST_DEBUG_OBJECT (dpad, "blocking pad: %d", blocked); - - opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad)); - 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 || !dbin->shutdown) - gst_pad_set_blocked_async_full (opad, blocked, - (GstPadBlockCallback) source_pad_blocked_cb, gst_object_ref (dpad), - (GDestroyNotify) gst_object_unref); - - if (blocked) { - if (dbin->shutdown) { - /* deactivate to force flushing state to prevent NOT_LINKED errors */ - gst_pad_set_active (GST_PAD_CAST (dpad), 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 (dpad); - dbin->blocked_pads = g_list_prepend (dbin->blocked_pads, dpad); - } - } else { - GList *l; - - if ((l = g_list_find (dbin->blocked_pads, dpad))) { - gst_object_unref (dpad); - dbin->blocked_pads = g_list_delete_link (dbin->blocked_pads, l); - } - } - gst_object_unref (opad); -out: - DYN_UNLOCK (dbin); -} - -static void -gst_decode_pad_add_drained_check (GstDecodePad * dpad) -{ - gst_pad_add_event_probe (GST_PAD_CAST (dpad), - G_CALLBACK (source_pad_event_probe), dpad); -} - -static void -gst_decode_pad_activate (GstDecodePad * dpad, GstDecodeChain * chain) -{ - g_return_if_fail (chain != NULL); - - dpad->chain = chain; - gst_pad_set_active (GST_PAD_CAST (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, GstDecodeChain * chain) -{ - GstDecodePad *dpad; - - GST_DEBUG_OBJECT (dbin, "making new decodepad"); - dpad = - g_object_new (GST_TYPE_DECODE_PAD, "direction", GST_PAD_DIRECTION (pad), - NULL); - gst_ghost_pad_construct (GST_GHOST_PAD_CAST (dpad)); - gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (dpad), pad); - dpad->chain = chain; - dpad->dbin = dbin; - - return dpad; -} - -static void -gst_pending_pad_free (GstPendingPad * ppad) -{ - g_assert (ppad); - g_assert (ppad->pad); - - if (ppad->event_probe_id != 0) - gst_pad_remove_event_probe (ppad->pad, ppad->event_probe_id); - gst_object_unref (ppad->pad); - g_slice_free (GstPendingPad, ppad); -} - -/***** - * 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; - - GST_LOG_OBJECT (dbin, "unblocking pads"); - - for (tmp = dbin->blocked_pads; tmp; tmp = tmp->next) { - GstDecodePad *dpad = (GstDecodePad *) tmp->data; - GstPad *opad; - - opad = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (dpad)); - if (!opad) - continue; - - GST_DEBUG_OBJECT (dpad, "unblocking"); - gst_pad_set_blocked_async_full (opad, FALSE, - (GstPadBlockCallback) source_pad_blocked_cb, gst_object_ref (dpad), - (GDestroyNotify) gst_object_unref); - /* make flushing, prevent NOT_LINKED */ - GST_PAD_SET_FLUSHING (GST_PAD_CAST (dpad)); - gst_object_unref (dpad); - gst_object_unref (opad); - GST_DEBUG_OBJECT (dpad, "unblocked"); - } - - /* clear, no more blocked pads */ - g_list_free (dbin->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; - g_mutex_lock (dbin->factories_lock); - gst_decode_bin_update_factories_list (dbin); - g_mutex_unlock (dbin->factories_lock); - break; - case GST_STATE_CHANGE_READY_TO_PAUSED: - DYN_LOCK (dbin); - GST_LOG_OBJECT (dbin, "clearing shutdown flag"); - dbin->shutdown = FALSE; - DYN_UNLOCK (dbin); - dbin->have_type = FALSE; - ret = GST_STATE_CHANGE_ASYNC; - do_async_start (dbin); - break; - case GST_STATE_CHANGE_PAUSED_TO_READY: - DYN_LOCK (dbin); - GST_LOG_OBJECT (dbin, "setting shutdown flag"); - dbin->shutdown = TRUE; - unblock_pads (dbin); - 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; - else if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) { - do_async_done (dbin); - ret = bret; - } - } - switch (transition) { - case GST_STATE_CHANGE_PAUSED_TO_READY: - do_async_done (dbin); - if (dbin->decode_chain) { - gst_decode_chain_free (dbin->decode_chain); - dbin->decode_chain = NULL; - } - 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 (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 */ - - /* Register some quarks here for the stream topology message */ - topology_structure_name = g_quark_from_static_string ("stream-topology"); - topology_caps = g_quark_from_static_string ("caps"); - topology_next = g_quark_from_static_string ("next"); - topology_pad = g_quark_from_static_string ("pad"); - - return gst_element_register (plugin, "decodebin2", GST_RANK_NONE, - GST_TYPE_DECODE_BIN); -} |