+/* 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.
+ *
+ * decodebin2 is considered stable now and replaces the old #decodebin element.
+ * #uridecodebin uses decodebin2 internally and is often more convenient to
+ * use, as it creates a suitable source element as well.
+ */
+
+/* Implementation notes:
+ *
+ * The following section describes how decodebin2 works internally.
+ *
+ * The first part of decodebin2 is its typefind element, which tries
+ * to determine the media 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 on the other hand 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
+ * if all chains and groups are drained. In that case everything goes into EOS.
+ * If there is a chain where the active group is drained but there exist next
+ * groups, the active group is hidden (endpads are removed) and the next group
+ * is exposed. This means that in some cases more pads may be created even
+ * after the initial no-more-pads signal. This happens for example with
+ * so-called "chained oggs", most commonly found among ogg/vorbis internet
+ * radio streams.
+ *
+ * Note 1: If we're talking about blocked endpads this really means that the
+ * *target* pads of the endpads are blocked. Pads that are exposed to the outside
+ * should never ever be blocked!
+ *
+ * Note 2: If a group is complete and the parent's chain demuxer adds new pads
+ * but never signaled no-more-pads this additional pads will be ignored!
+ *
+ */
+
+#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 "gstplayback.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 */
+ GList *factories; /* factories we can use for selecting elements */
+
+ GMutex *subtitle_lock; /* Protects changes to subtitles and encoding */
+ GList *subtitles; /* List of elements with subtitle-encoding,
+ * protected by above mutex! */
+
+ gboolean have_type; /* if we received the have_type signal */
+ guint have_type_id; /* signal id for have-type from typefind */
+
+ gboolean async_pending; /* async-start has been emited */
+
+ GMutex *dyn_lock; /* lock protecting pad blocking */
+ gboolean shutdown; /* if we are shutting down */
+ GList *blocked_pads; /* pads that have set to block */
+
+ gboolean expose_allstreams; /* Whether to expose unknow type streams or not */
+};
+
+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
+#define DEFAULT_EXPOSE_ALL_STREAMS TRUE
+
+/* 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_EXPOSE_ALL_STREAMS,
+ PROP_LAST
+};
+
+static GstBinClass *parent_class;
+static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
+
+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 */
+};
+
+GType gst_decode_pad_get_type (void);
+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 gboolean
+_gst_array_hasvalue_accumulator (GSignalInvocationHint * ihint,
+ GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+ gpointer array;
+
+ array = g_value_get_boxed (handler_return);
+ if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+ g_value_set_boxed (return_accu, array);
+
+ if (array != NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+static void
+gst_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.
+ *
+ * Deprecated: Use GstElement::pad-added instead of this signal.
+ *
+ */
+ 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.
+ *
+ * Deprecated: Use GstElement::pad-removed instead of this signal.
+ *
+ */
+ 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.
+ *
+ * <note>
+ * Invocation of signal handlers stops after the first signal handler
+ * returns #FALSE. Signal handlers are invoked in the order they were
+ * connected in.
+ * </note>
+ *
+ * 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.
+ *
+ * <note>
+ * Only the signal handler that is connected first will ever by invoked.
+ * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
+ * signal, they will never be invoked!
+ * </note>
+ *
+ * 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 or return #NULL if the
+ * order should not change.
+ *
+ * <note>
+ * Invocation of signal handlers stops after one signal handler has
+ * returned something else than #NULL. Signal handlers are invoked in
+ * the order they were connected in.
+ * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
+ * signal, they will never be invoked!
+ * </note>
+ *
+ * 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),
+ _gst_array_hasvalue_accumulator, 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.
+ *
+ * <note>
+ * Only the signal handler that is connected first will ever by invoked.
+ * Don't connect signal handlers with the #G_CONNECT_AFTER flag to this
+ * signal, they will never be invoked!
+ * </note>
+ *
+ * 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));
+
+ /**
+ * GstDecodeBin2::expose-all-streams
+ *
+ * Expose streams of unknown type.
+ *
+ * If set to %FALSE, then only the streams that can be decoded to the final
+ * caps (see 'caps' property) will have a pad exposed. Streams that do not
+ * match those caps but could have been decoded will not have decoder plugged
+ * in internally and will not have a pad exposed.
+ *
+ * Since: 0.10.30
+ */
+ g_object_class_install_property (gobject_klass, PROP_EXPOSE_ALL_STREAMS,
+ g_param_spec_boolean ("expose-all-streams", "Expose All Streams",
+ "Expose all streams, including those of unknown type or that don't match the 'caps' property",
+ DEFAULT_EXPOSE_ALL_STREAMS,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+
+
+ 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_simple (gstelement_klass,
+ "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>");
+
+ 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)
+ gst_plugin_feature_list_free (dbin->factories);
+ dbin->factories =
+ gst_element_factory_list_get_elements
+ (GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
+ 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 ();
+
+ /* 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;
+ GstPadTemplate *pad_tmpl;
+
+ /* 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");
+
+ /* get the pad template */
+ pad_tmpl = gst_static_pad_template_get (&decoder_bin_sink_template);
+
+ /* ghost the sink pad to ourself */
+ gpad = gst_ghost_pad_new_from_template ("sink", pad, pad_tmpl);
+ gst_pad_set_active (gpad, TRUE);
+ gst_element_add_pad (GST_ELEMENT (decode_bin), gpad);
+
+ gst_object_unref (pad_tmpl);
+ 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;
+
+ decode_bin->expose_allstreams = DEFAULT_EXPOSE_ALL_STREAMS;
+}
+
+static void
+gst_decode_bin_dispose (GObject * object)
+{
+ GstDecodeBin *decode_bin;
+
+ decode_bin = GST_DECODE_BIN (object);
+
+ if (decode_bin->factories)
+ gst_plugin_feature_list_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;
+ case PROP_EXPOSE_ALL_STREAMS:
+ dbin->expose_allstreams = 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;
+ case PROP_EXPOSE_ALL_STREAMS:
+ g_value_set_boolean (value, dbin->expose_allstreams);
+ 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)
+{
+ GList *list, *tmp;
+ 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);
+ list =
+ gst_element_factory_list_filter (dbin->factories, caps, GST_PAD_SINK,
+ FALSE);
+ g_mutex_unlock (dbin->factories_lock);
+
+ result = g_value_array_new (g_list_length (list));
+ for (tmp = list; tmp; tmp = tmp->next) {
+ GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (tmp->data);
+ GValue val = { 0, };
+
+ g_value_init (&val, G_TYPE_OBJECT);
+ g_value_set_object (&val, factory);
+ g_value_array_append (result, &val);
+ g_value_unset (&val);
+ }
+ gst_plugin_feature_list_free (list);
+
+ GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result);
+
+ return result;
+}
+
+static GValueArray *
+gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad,
+ GstCaps * caps, GValueArray * factories)
+{
+ return NULL;
+}
+
+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_final_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;
+
+ /* we are adding a new pad for a demuxer (see is_demuxer_element(),
+ * start a new chain for it */
+ CHAIN_MUTEX_LOCK (oldchain);
+ group = gst_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_final_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 a type for which we have no decoder */
+ if (factories->n_values == 0) {
+ if (!dbin->expose_allstreams) {
+ GstCaps *raw = gst_static_caps_get (&default_raw_caps);
+
+ /* If the caps are raw, this just means we don't want to expose them */
+ if (gst_caps_can_intersect (raw, caps)) {
+ gst_caps_unref (raw);
+ gst_object_unref (dpad);
+ goto discarded_type;
+ }
+ gst_caps_unref (raw);
+ }
+
+ /* if not we have a unhandled type with 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);
+ if (result) {
+ g_value_array_free (factories);
+ factories = result;
+ }
+
+ /* At this point we have a potential decoder, but we might not need it
+ * if it doesn't match the output caps */
+ if (!dbin->expose_allstreams) {
+ guint i;
+ const GList *tmps;
+ gboolean dontuse = FALSE;
+
+ GST_DEBUG ("Checking if we can abort early");
+
+ /* 1.e Do an early check to see if the candidates are potential decoders, but
+ * due to the fact that they decode to a mediatype that is not final we don't
+ * need them */
+
+ for (i = 0; i < factories->n_values && !dontuse; i++) {
+ GstElementFactory *factory =
+ g_value_get_object (g_value_array_get_nth (factories, 0));
+ GstCaps *tcaps;
+
+ /* We are only interested in skipping decoders */
+ if (strstr (gst_element_factory_get_klass (factory), "Decoder")) {
+
+ GST_DEBUG ("Trying factory %s",
+ gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
+
+ /* Check the source pad template caps to see if they match raw caps but don't match
+ * our final caps*/
+ for (tmps = gst_element_factory_get_static_pad_templates (factory);
+ tmps && !dontuse; tmps = tmps->next) {
+ GstStaticPadTemplate *st = (GstStaticPadTemplate *) tmps->data;
+ if (st->direction != GST_PAD_SRC)
+ continue;
+ tcaps = gst_static_pad_template_get_caps (st);
+
+ apcontinue = TRUE;
+
+ /* Emit autoplug-continue to see if the caps are considered to be raw caps */
+ g_signal_emit (G_OBJECT (dbin),
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, dpad, tcaps,
+ &apcontinue);
+
+ /* If autoplug-continue returns TRUE and the caps are not final, don't use them */
+ if (apcontinue && !are_final_caps (dbin, tcaps))
+ dontuse = TRUE;
+ gst_caps_unref (tcaps);
+ }
+ }
+ }
+
+ if (dontuse) {
+ gst_object_unref (dpad);
+ goto discarded_type;
+ }
+ }
+
+ /* 1.f 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;
+ }
+
+discarded_type:
+ {
+ GST_LOG_OBJECT (pad, "Known type, but discarded because not final caps");
+ chain->deadend = TRUE;
+ chain->endcaps = gst_caps_ref (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);
+
+ 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);
+
+ 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));
+ }
+ do_async_done (dbin);
+ }
+ 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);
+
+ /* If the factory is for a parser we first check if the factory
+ * was already used for the current chain. If it was used already
+ * we would otherwise create an infinite loop here because the
+ * parser apparently accepts its own output as input.
+ * This is only done for parsers because it's perfectly valid
+ * to have other element classes after each other because a
+ * parser is the only one that does not change the data. A
+ * valid example for this would be multiple id3demux in a row.
+ */
+ if (strstr (gst_element_factory_get_klass (factory), "Parser")) {
+ gboolean skip = FALSE;
+ GList *l;
+
+ CHAIN_MUTEX_LOCK (chain);
+ for (l = chain->elements; l; l = l->next) {
+ GstElement *otherelement = GST_ELEMENT_CAST (l->data);
+
+ if (gst_element_get_factory (otherelement) == factory) {
+ skip = TRUE;
+ break;
+ }
+ }
+ CHAIN_MUTEX_UNLOCK (chain);
+ if (skip) {
+ GST_DEBUG_OBJECT (dbin,
+ "Skipping factory '%s' because it was already used in this chain",
+ gst_plugin_feature_get_name (GST_PLUGIN_FEATURE_CAST (factory)));
+ continue;
+ }
+ }
+
+ /* 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 {
+ GList *l;
+
+ tmp = chain->elements->data;
+
+ /* Disconnect any signal handlers that might be connected
+ * in connect_element() or analyze_pad() */
+ g_signal_handlers_disconnect_by_func (tmp, pad_added_cb, chain);
+ g_signal_handlers_disconnect_by_func (tmp, pad_removed_cb, chain);
+ g_signal_handlers_disconnect_by_func (tmp, no_more_pads_cb, chain);
+
+ for (l = chain->pending_pads; l;) {
+ GstPendingPad *pp = l->data;
+ GList *n;
+
+ if (GST_PAD_PARENT (pp->pad) != tmp) {
+ l = l->next;
+ continue;
+ }
+
+ g_signal_handlers_disconnect_by_func (pp->pad, caps_notify_cb, chain);
+ gst_pad_remove_event_probe (pp->pad, pp->event_probe_id);
+ gst_object_unref (pp->pad);
+ g_slice_free (GstPendingPad, pp);
+
+ /* Remove element from the list, update list head and go to the
+ * next element in the list */
+ n = l->next;
+ chain->pending_pads = g_list_delete_link (chain->pending_pads, l);
+ l = n;
+ }
+
+ gst_bin_remove (GST_BIN (dbin), tmp);
+ gst_element_set_state (tmp, GST_STATE_NULL);
+
+ gst_object_unref (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 GstCaps *
+get_pad_caps (GstPad * pad)
+{
+ GstCaps *caps;
+
+ /* first check the pad caps, if this is set, we are positively sure it is
+ * fixed and exactly what the element will produce. */
+ GST_OBJECT_LOCK (pad);
+ if ((caps = GST_PAD_CAPS (pad)))
+ gst_caps_ref (caps);
+ GST_OBJECT_UNLOCK (pad);
+
+ /* then use the getcaps function if we don't have caps. These caps might not
+ * be fixed in some cases, in which case analyze_new_pad will set up a
+ * notify::caps signal to continue autoplugging. */
+ if (caps == NULL)
+ caps = gst_pad_get_caps_reffed (pad);
+
+ return caps;
+}
+
+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 = get_pad_caps (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, *sink_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");
+ sink_pad = gst_element_get_static_pad (typefind, "sink");
+
+ /* need some lock here to prevent race with shutdown state change
+ * which might yank away e.g. decode_chain while building stuff here.
+ * In typical cases, STREAM_LOCK is held and handles that, it need not
+ * be held (if called from a proxied setcaps), so grab it anyway */
+ GST_PAD_STREAM_LOCK (sink_pad);
+ 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_PAD_STREAM_UNLOCK (sink_pad);
+
+ gst_object_unref (sink_pad);
+ 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 = get_pad_caps (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 compatible with the caps specified in the 'caps'
+ * property (which by default are the raw caps)
+ *
+ * The decodebin_lock should be taken !
+ */
+static gboolean
+are_final_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));
+ g_signal_emit (G_OBJECT (chain->dbin),
+ gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD], 0, 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;
+
+ /* default is for use-buffering is FALSE */
+ if (dbin->use_buffering) {
+ g_object_set (mq,
+ "use-buffering", TRUE,
+ "low-percent", dbin->low_percent,
+ "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;
+ 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 = get_pad_caps (GST_PAD_CAST (da));
+ capsb = get_pad_caps (GST_PAD_CAST (db));
+
+ sa = gst_caps_get_structure ((const GstCaps *) capsa, 0);
+ sb = gst_caps_get_structure ((const GstCaps *) capsb, 0);
+
+ namea = gst_structure_get_name (sa);
+ nameb = gst_structure_get_name (sb);
+
+ if (g_strrstr (namea, "video/x-raw-"))
+ va = 0;
+ else if (g_strrstr (namea, "video/"))
+ va = 1;
+ else if (g_strrstr (namea, "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;
+
+ if (G_UNLIKELY ((chain->endpad || chain->deadend)
+ && (chain->endcaps == NULL))) {
+ GST_WARNING ("End chain without valid caps !");
+ return NULL;
+ }
+
+ 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);
+ if (s) {
+ 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);
+
+ if (caps) {
+ 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 = get_pad_caps (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;
+ GstPadTemplate *pad_tmpl;
+
+ GST_DEBUG_OBJECT (dbin, "making new decodepad");
+ pad_tmpl = gst_static_pad_template_get (&decoder_bin_src_template);
+ dpad =
+ g_object_new (GST_TYPE_DECODE_PAD, "direction", GST_PAD_DIRECTION (pad),
+ "template", pad_tmpl, 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;
+ gst_object_unref (pad_tmpl);
+
+ 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;
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ /* Make sure we've cleared all existing chains */
+ if (dbin->decode_chain) {
+ gst_decode_chain_free (dbin->decode_chain);
+ dbin->decode_chain = NULL;
+ }
+ 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);
+}
projects / mafwsubrenderer / blobdiff