--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/playback/gstdecodebin2.c Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,2426 @@
+/* GStreamer
+ * Copyright (C) <2006> Edward Hervey <edward@fluendo.com>
+ *
+ * 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
+ * @short_description: Next-generation automatic decoding bin
+ *
+ * #GstBin that auto-magically constructs a decoding pipeline using available
+ * decoders and demuxers via auto-plugging.
+ *
+ * At this stage, decodebin2 is considered UNSTABLE. The API provided in the
+ * signals is expected to change in the near future.
+ *
+ * To try out decodebin2, you can set the USE_DECODEBIN2 environment
+ * variable (USE_DECODEBIN2=1 for example). This will cause playbin to use
+ * decodebin2 instead of the older decodebin for its internal auto-plugging.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst-i18n-plugin.h>
+
+#include <string.h>
+#include <gst/gst.h>
+#include <gst/pbutils/pbutils.h>
+
+#include "gstplay-marshal.h"
+#include "gstplay-enum.h"
+#include "gstfactorylists.h"
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+/* generic templates */
+static GstStaticPadTemplate decoder_bin_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS_ANY);
+
+static GstStaticPadTemplate decoder_bin_src_template =
+GST_STATIC_PAD_TEMPLATE ("src%d",
+ GST_PAD_SRC,
+ GST_PAD_SOMETIMES,
+ GST_STATIC_CAPS_ANY);
+
+GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug);
+#define GST_CAT_DEFAULT gst_decode_bin_debug
+
+typedef struct _GstDecodeGroup GstDecodeGroup;
+typedef struct _GstDecodePad GstDecodePad;
+typedef struct _GstDecodeBin GstDecodeBin;
+typedef struct _GstDecodeBin GstDecodeBin2;
+typedef struct _GstDecodeBinClass GstDecodeBinClass;
+
+#define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type())
+#define GST_DECODE_BIN_CAST(obj) ((GstDecodeBin*)(obj))
+#define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin))
+#define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass))
+#define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN))
+#define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN))
+
+/**
+ * GstDecodeBin2:
+ *
+ * The opaque #DecodeBin2 data structure
+ */
+struct _GstDecodeBin
+{
+ GstBin bin; /* we extend GstBin */
+
+ /* properties */
+ GstCaps *caps; /* caps on which to stop decoding */
+ gchar *encoding; /* encoding of subtitles */
+
+ GstElement *typefind; /* this holds the typefind object */
+ GstElement *fakesink;
+
+ GMutex *lock; /* Protects activegroup and groups */
+ GstDecodeGroup *activegroup; /* group currently active */
+ GList *groups; /* List of non-active GstDecodeGroups, sorted in
+ * order of creation. */
+ GList *oldgroups; /* List of no-longer-used GstDecodeGroups.
+ * Should be freed in dispose */
+ gint nbpads; /* unique identifier for source pads */
+
+ GValueArray *factories; /* factories we can use for selecting elements */
+
+ gboolean have_type; /* if we received the have_type signal */
+ guint have_type_id; /* signal id for have-type from typefind */
+};
+
+struct _GstDecodeBinClass
+{
+ GstBinClass parent_class;
+
+ /* signal we fire when a new pad has been decoded into raw audio/video */
+ void (*new_decoded_pad) (GstElement * element, GstPad * pad, gboolean last);
+ /* signal we fire when a pad has been removed */
+ void (*removed_decoded_pad) (GstElement * element, GstPad * pad);
+ /* signal fired when we found a pad that we cannot decode */
+ void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
+
+ /* signal fired to know if we continue trying to decode the given caps */
+ gboolean (*autoplug_continue) (GstElement * element, GstPad * pad,
+ GstCaps * caps);
+ /* signal fired to get a list of factories to try to autoplug */
+ GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad,
+ GstCaps * caps);
+ /* signal fired to sort the factories */
+ GValueArray *(*autoplug_sort) (GstElement * element, GstPad * pad,
+ GstCaps * caps, GValueArray * factories);
+ /* signal fired to select from the proposed list of factories */
+ GstAutoplugSelectResult (*autoplug_select) (GstElement * element,
+ GstPad * pad, GstCaps * caps, GstElementFactory * factory);
+
+ /* fired when the last group is drained */
+ void (*drained) (GstElement * element);
+};
+
+/* signals */
+enum
+{
+ SIGNAL_NEW_DECODED_PAD,
+ SIGNAL_REMOVED_DECODED_PAD,
+ SIGNAL_UNKNOWN_TYPE,
+ SIGNAL_AUTOPLUG_CONTINUE,
+ SIGNAL_AUTOPLUG_FACTORIES,
+ SIGNAL_AUTOPLUG_SELECT,
+ SIGNAL_AUTOPLUG_SORT,
+ SIGNAL_DRAINED,
+ LAST_SIGNAL
+};
+
+/* Properties */
+enum
+{
+ PROP_0,
+ PROP_CAPS,
+ PROP_SUBTITLE_ENCODING
+};
+
+static GstBinClass *parent_class;
+static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
+
+static const GstElementDetails gst_decode_bin_details =
+GST_ELEMENT_DETAILS ("Decoder Bin",
+ "Generic/Bin/Decoder",
+ "Autoplug and decode to raw media",
+ "Edward Hervey <edward@fluendo.com>");
+
+
+static gboolean add_fakesink (GstDecodeBin * decode_bin);
+static void remove_fakesink (GstDecodeBin * decode_bin);
+
+static void type_found (GstElement * typefind, guint probability,
+ GstCaps * caps, GstDecodeBin * decode_bin);
+
+static gboolean gst_decode_bin_autoplug_continue (GstElement * element,
+ GstPad * pad, GstCaps * caps);
+static GValueArray *gst_decode_bin_autoplug_factories (GstElement *
+ element, GstPad * pad, GstCaps * caps);
+static GValueArray *gst_decode_bin_autoplug_sort (GstElement * element,
+ GstPad * pad, GstCaps * caps, GValueArray * factories);
+static GstAutoplugSelectResult gst_decode_bin_autoplug_select (GstElement *
+ element, GstPad * pad, GstCaps * caps, GstElementFactory * factory);
+
+static void gst_decode_bin_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_decode_bin_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void gst_decode_bin_set_caps (GstDecodeBin * dbin, GstCaps * caps);
+static GstCaps *gst_decode_bin_get_caps (GstDecodeBin * dbin);
+static void caps_notify_group_cb (GstPad * pad, GParamSpec * unused,
+ GstDecodeGroup * group);
+static void caps_notify_cb (GstPad * pad, GParamSpec * unused,
+ GstDecodeBin * dbin);
+
+static GstPad *find_sink_pad (GstElement * element);
+static GstStateChangeReturn gst_decode_bin_change_state (GstElement * element,
+ GstStateChange transition);
+
+#define DECODE_BIN_LOCK(dbin) G_STMT_START { \
+ GST_LOG_OBJECT (dbin, \
+ "locking from thread %p", \
+ g_thread_self ()); \
+ g_mutex_lock (GST_DECODE_BIN_CAST(dbin)->lock); \
+ GST_LOG_OBJECT (dbin, \
+ "locked from thread %p", \
+ g_thread_self ()); \
+} G_STMT_END
+
+#define DECODE_BIN_UNLOCK(dbin) G_STMT_START { \
+ GST_LOG_OBJECT (dbin, \
+ "unlocking from thread %p", \
+ g_thread_self ()); \
+ g_mutex_unlock (GST_DECODE_BIN_CAST(dbin)->lock); \
+} G_STMT_END
+
+/* GstDecodeGroup
+ *
+ * Streams belonging to the same group/chain of a media file
+ *
+ */
+struct _GstDecodeGroup
+{
+ GstDecodeBin *dbin;
+ GMutex *lock;
+ GstElement *multiqueue;
+ gboolean exposed; /* TRUE if this group is exposed */
+ gboolean drained; /* TRUE if EOS went throug all endpads */
+ gboolean blocked; /* TRUE if all endpads are blocked */
+ gboolean complete; /* TRUE if we are not expecting anymore streams
+ * on this group */
+ gulong overrunsig;
+ gulong underrunsig;
+ guint nbdynamic; /* number of dynamic pads in the group. */
+
+ GList *endpads; /* List of GstDecodePad of source pads to be exposed */
+ GList *ghosts; /* List of GstGhostPad for the endpads */
+ GList *reqpads; /* List of RequestPads for multiqueue. */
+};
+
+#define GROUP_MUTEX_LOCK(group) G_STMT_START { \
+ GST_LOG_OBJECT (group->dbin, \
+ "locking group %p from thread %p", \
+ group, g_thread_self ()); \
+ g_mutex_lock (group->lock); \
+ GST_LOG_OBJECT (group->dbin, \
+ "locked group %p from thread %p", \
+ group, g_thread_self ()); \
+} G_STMT_END
+
+#define GROUP_MUTEX_UNLOCK(group) G_STMT_START { \
+ GST_LOG_OBJECT (group->dbin, \
+ "unlocking group %p from thread %p", \
+ group, g_thread_self ()); \
+ g_mutex_unlock (group->lock); \
+} G_STMT_END
+
+
+static GstDecodeGroup *gst_decode_group_new (GstDecodeBin * decode_bin,
+ gboolean use_queue);
+static GstPad *gst_decode_group_control_demuxer_pad (GstDecodeGroup * group,
+ GstPad * pad);
+static gboolean gst_decode_group_control_source_pad (GstDecodeGroup * group,
+ GstPad * pad);
+static gboolean gst_decode_group_expose (GstDecodeGroup * group);
+static void gst_decode_group_check_if_blocked (GstDecodeGroup * group);
+static void gst_decode_group_set_complete (GstDecodeGroup * group);
+static void gst_decode_group_hide (GstDecodeGroup * group);
+static void gst_decode_group_free (GstDecodeGroup * group);
+
+/* GstDecodePad
+ *
+ * GstPad private used for source pads of groups
+ */
+
+struct _GstDecodePad
+{
+ GstPad *pad;
+ GstDecodeGroup *group;
+ gboolean blocked;
+ gboolean drained;
+};
+
+static GstDecodePad *gst_decode_pad_new (GstDecodeGroup * group, GstPad * pad,
+ gboolean block);
+static void source_pad_blocked_cb (GstPad * pad, gboolean blocked,
+ GstDecodePad * dpad);
+
+/* TempPadStruct
+ * Internal structure used for pads which have more than one structure.
+ */
+typedef struct _TempPadStruct
+{
+ GstDecodeBin *dbin;
+ GstDecodeGroup *group;
+} TempPadStruct;
+
+/********************************
+ * Standard GObject boilerplate *
+ ********************************/
+
+static void gst_decode_bin_class_init (GstDecodeBinClass * klass);
+static void gst_decode_bin_init (GstDecodeBin * decode_bin);
+static void gst_decode_bin_dispose (GObject * object);
+static void gst_decode_bin_finalize (GObject * object);
+
+static GType
+gst_decode_bin_get_type (void)
+{
+ static GType gst_decode_bin_type = 0;
+
+ if (!gst_decode_bin_type) {
+ static const GTypeInfo gst_decode_bin_info = {
+ sizeof (GstDecodeBinClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_decode_bin_class_init,
+ NULL,
+ NULL,
+ sizeof (GstDecodeBin),
+ 0,
+ (GInstanceInitFunc) gst_decode_bin_init,
+ NULL
+ };
+
+ gst_decode_bin_type =
+ g_type_register_static (GST_TYPE_BIN, "GstDecodeBin2",
+ &gst_decode_bin_info, 0);
+ }
+
+ return gst_decode_bin_type;
+}
+
+static gboolean
+_gst_boolean_accumulator (GSignalInvocationHint * ihint,
+ GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+ gboolean myboolean;
+
+ myboolean = g_value_get_boolean (handler_return);
+ if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+ g_value_set_boolean (return_accu, myboolean);
+
+ /* stop emission if FALSE */
+ return myboolean;
+}
+
+/* we collect the first result */
+static gboolean
+_gst_array_accumulator (GSignalInvocationHint * ihint,
+ GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+ gpointer array;
+
+ array = g_value_get_boxed (handler_return);
+ if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+ g_value_set_boxed (return_accu, array);
+
+ return FALSE;
+}
+
+static gboolean
+_gst_select_accumulator (GSignalInvocationHint * ihint,
+ GValue * return_accu, const GValue * handler_return, gpointer dummy)
+{
+ GstAutoplugSelectResult res;
+
+ res = g_value_get_enum (handler_return);
+ if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
+ g_value_set_enum (return_accu, res);
+
+ return FALSE;
+}
+
+static void
+gst_decode_bin_class_init (GstDecodeBinClass * klass)
+{
+ GObjectClass *gobject_klass;
+ GstElementClass *gstelement_klass;
+ GstBinClass *gstbin_klass;
+
+ gobject_klass = (GObjectClass *) klass;
+ gstelement_klass = (GstElementClass *) klass;
+ gstbin_klass = (GstBinClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_decode_bin_dispose);
+ gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_decode_bin_finalize);
+ gobject_klass->set_property = GST_DEBUG_FUNCPTR (gst_decode_bin_set_property);
+ gobject_klass->get_property = GST_DEBUG_FUNCPTR (gst_decode_bin_get_property);
+
+ /**
+ * GstDecodeBin2::new-decoded-pad:
+ * @pad: the newly created pad
+ * @islast: #TRUE if this is the last pad to be added. Deprecated.
+ *
+ * This signal gets emitted as soon as a new pad of the same type as one of
+ * the valid 'raw' types is added.
+ */
+ gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] =
+ g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstDecodeBinClass, new_decoded_pad), NULL, NULL,
+ gst_play_marshal_VOID__OBJECT_BOOLEAN, G_TYPE_NONE, 2, GST_TYPE_PAD,
+ G_TYPE_BOOLEAN);
+
+ /**
+ * GstDecodeBin2::removed-decoded-pad:
+ * @pad: the pad that was removed
+ *
+ * This signal is emitted when a 'final' caps pad has been removed.
+ */
+ gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD] =
+ g_signal_new ("removed-decoded-pad", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstDecodeBinClass, removed_decoded_pad), NULL, NULL,
+ gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
+
+ /**
+ * GstDecodeBin2::unknown-type:
+ * @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_OBJECT, G_TYPE_NONE, 2,
+ GST_TYPE_PAD, GST_TYPE_CAPS);
+
+ /**
+ * GstDecodeBin2::autoplug-continue:
+ * @pad: The #GstPad.
+ * @caps: The #GstCaps found.
+ *
+ * This signal is emitted whenever decodebin2 finds a new stream. It is
+ * emitted before looking for any elements that can handle that stream.
+ *
+ * Returns: #TRUE if you wish decodebin2 to look for elements that can
+ * handle the given @caps. If #FALSE, those caps will be considered as
+ * final and the pad will be exposed as such (see 'new-decoded-pad'
+ * signal).
+ */
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] =
+ g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_continue),
+ _gst_boolean_accumulator, NULL, gst_play_marshal_BOOLEAN__OBJECT_OBJECT,
+ G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, GST_TYPE_CAPS);
+
+ /**
+ * GstDecodeBin2::autoplug-factories:
+ * @pad: The #GstPad.
+ * @caps: The #GstCaps found.
+ *
+ * This function is emited when an array of possible factories for @caps on
+ * @pad is needed. Decodebin2 will by default return an array with all
+ * compatible factories, sorted by rank.
+ *
+ * If this function returns NULL, @pad will be exposed as a final caps.
+ *
+ * If this function returns an empty array, the pad will be considered as
+ * having an unhandled type media type.
+ *
+ * Returns: a #GValueArray* with a list of factories to try. The factories are
+ * by default tried in the returned order or based on the index returned by
+ * "autoplug-select".
+ */
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] =
+ g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass,
+ autoplug_factories), _gst_array_accumulator, NULL,
+ gst_play_marshal_BOXED__OBJECT_OBJECT, G_TYPE_VALUE_ARRAY, 2,
+ GST_TYPE_PAD, GST_TYPE_CAPS);
+
+ /**
+ * GstDecodeBin2::autoplug-sort:
+ * @pad: The #GstPad.
+ * @caps: The #GstCaps.
+ * @factories: A #GValueArray of possible #GstElementFactory to use.
+ *
+ * Once decodebin2 has found the possible #GstElementFactory objects to try
+ * for @caps on @pad, this signal is emited. The purpose of the signal is for
+ * the application to perform additional sorting or filtering on the element
+ * factory array.
+ *
+ * The callee should copy and modify @factories.
+ *
+ * Returns: A new sorted array of #GstElementFactory objects.
+ */
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT] =
+ g_signal_new ("autoplug-sort", G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, autoplug_sort),
+ NULL, NULL, gst_play_marshal_BOXED__OBJECT_OBJECT_BOXED,
+ G_TYPE_VALUE_ARRAY, 3, GST_TYPE_PAD, GST_TYPE_CAPS, G_TYPE_VALUE_ARRAY);
+
+ /**
+ * GstDecodeBin2::autoplug-select:
+ * @pad: The #GstPad.
+ * @caps: The #GstCaps.
+ * @factories: A #GValueArray of possible #GstElementFactory to use, sorted by
+ * rank (higher ranks come first).
+ *
+ * This signal is emitted once decodebin2 has found all the possible
+ * #GstElementFactory that can be used to handle the given @caps.
+ *
+ * Returns: A #gint indicating what factory index from the @factories array
+ * that you wish decodebin2 to use for trying to decode the given @caps.
+ * Return -1 to stop selection of a factory and expose the pad as a raw type.
+ * The default handler always returns the first possible factory (index 0).
+ */
+ 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_OBJECT_OBJECT,
+ GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS,
+ GST_TYPE_ELEMENT_FACTORY);
+
+ /**
+ * GstDecodeBin2::drained
+ *
+ * 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_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));
+
+ klass->autoplug_continue =
+ GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_continue);
+ klass->autoplug_factories =
+ GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_factories);
+ klass->autoplug_sort = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_sort);
+ klass->autoplug_select = GST_DEBUG_FUNCPTR (gst_decode_bin_autoplug_select);
+
+ gst_element_class_add_pad_template (gstelement_klass,
+ gst_static_pad_template_get (&decoder_bin_sink_template));
+ gst_element_class_add_pad_template (gstelement_klass,
+ gst_static_pad_template_get (&decoder_bin_src_template));
+
+ gst_element_class_set_details (gstelement_klass, &gst_decode_bin_details);
+
+ gstelement_klass->change_state =
+ GST_DEBUG_FUNCPTR (gst_decode_bin_change_state);
+}
+
+static void
+gst_decode_bin_init (GstDecodeBin * decode_bin)
+{
+ /* first filter out the interesting element factories */
+ decode_bin->factories =
+ gst_factory_list_get_elements (GST_FACTORY_LIST_DECODER);
+
+ /* we create the typefind element only once */
+ decode_bin->typefind = gst_element_factory_make ("typefind", "typefind");
+ if (!decode_bin->typefind) {
+ g_warning ("can't find typefind element, decodebin will not work");
+ } else {
+ GstPad *pad;
+ GstPad *gpad;
+
+ /* add the typefind element */
+ if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind)) {
+ g_warning ("Could not add typefind element, decodebin will not work");
+ gst_object_unref (decode_bin->typefind);
+ decode_bin->typefind = NULL;
+ }
+
+ /* get the sinkpad */
+ pad = gst_element_get_pad (decode_bin->typefind, "sink");
+
+ /* ghost the sink pad to ourself */
+ gpad = gst_ghost_pad_new ("sink", pad);
+ gst_pad_set_active (gpad, TRUE);
+ gst_element_add_pad (GST_ELEMENT (decode_bin), gpad);
+
+ gst_object_unref (pad);
+
+ /* connect a signal to find out when the typefind element found
+ * a type */
+ decode_bin->have_type_id =
+ g_signal_connect (G_OBJECT (decode_bin->typefind), "have-type",
+ G_CALLBACK (type_found), decode_bin);
+ }
+
+ decode_bin->lock = g_mutex_new ();
+ decode_bin->activegroup = NULL;
+ decode_bin->groups = NULL;
+
+ decode_bin->caps =
+ gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb;video/x-raw-gray;"
+ "audio/x-raw-int;audio/x-raw-float;" "text/plain;text/x-pango-markup");
+
+ add_fakesink (decode_bin);
+
+ /* FILLME */
+}
+
+static void
+gst_decode_bin_dispose (GObject * object)
+{
+ GstDecodeBin *decode_bin;
+ GList *tmp;
+
+ decode_bin = GST_DECODE_BIN (object);
+
+ if (decode_bin->factories)
+ g_value_array_free (decode_bin->factories);
+ decode_bin->factories = NULL;
+
+ if (decode_bin->activegroup) {
+ gst_decode_group_free (decode_bin->activegroup);
+ decode_bin->activegroup = NULL;
+ }
+
+ /* remove groups */
+ for (tmp = decode_bin->groups; tmp; tmp = g_list_next (tmp)) {
+ GstDecodeGroup *group = (GstDecodeGroup *) tmp->data;
+
+ gst_decode_group_free (group);
+ }
+ g_list_free (decode_bin->groups);
+ decode_bin->groups = NULL;
+
+ for (tmp = decode_bin->oldgroups; tmp; tmp = g_list_next (tmp)) {
+ GstDecodeGroup *group = (GstDecodeGroup *) tmp->data;
+
+ gst_decode_group_free (group);
+ }
+ g_list_free (decode_bin->oldgroups);
+ decode_bin->oldgroups = NULL;
+
+ if (decode_bin->caps)
+ gst_caps_unref (decode_bin->caps);
+ decode_bin->caps = NULL;
+
+ g_free (decode_bin->encoding);
+ decode_bin->encoding = NULL;
+
+ remove_fakesink (decode_bin);
+
+ G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gst_decode_bin_finalize (GObject * object)
+{
+ GstDecodeBin *decode_bin;
+
+ decode_bin = GST_DECODE_BIN (object);
+
+ if (decode_bin->lock) {
+ g_mutex_free (decode_bin->lock);
+ decode_bin->lock = NULL;
+ }
+
+ 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);
+
+ DECODE_BIN_LOCK (dbin);
+ if (dbin->caps)
+ gst_caps_unref (dbin->caps);
+ if (caps)
+ gst_caps_ref (caps);
+ dbin->caps = caps;
+ DECODE_BIN_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");
+
+ DECODE_BIN_LOCK (dbin);
+ caps = dbin->caps;
+ if (caps)
+ gst_caps_ref (caps);
+ DECODE_BIN_UNLOCK (dbin);
+
+ return caps;
+}
+
+static void
+gst_decode_bin_set_subs_encoding (GstDecodeBin * dbin, const gchar * encoding)
+{
+ GST_DEBUG_OBJECT (dbin, "Setting new encoding: %s", GST_STR_NULL (encoding));
+
+ DECODE_BIN_LOCK (dbin);
+ g_free (dbin->encoding);
+ dbin->encoding = g_strdup (encoding);
+ DECODE_BIN_UNLOCK (dbin);
+}
+
+static gchar *
+gst_decode_bin_get_subs_encoding (GstDecodeBin * dbin)
+{
+ gchar *encoding;
+
+ GST_DEBUG_OBJECT (dbin, "Getting currently set encoding");
+
+ DECODE_BIN_LOCK (dbin);
+ encoding = g_strdup (dbin->encoding);
+ DECODE_BIN_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;
+ 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;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static GValueArray *find_compatibles (GstDecodeBin * decode_bin,
+ GstPad * pad, const GstCaps * caps);
+
+/*****
+ * Default autoplug signal handlers
+ *****/
+static gboolean
+gst_decode_bin_autoplug_continue (GstElement * element, GstPad * pad,
+ GstCaps * caps)
+{
+ GST_DEBUG_OBJECT (element, "autoplug-continue returns TRUE");
+
+ /* by default we always continue */
+ return TRUE;
+}
+
+static GValueArray *
+gst_decode_bin_autoplug_factories (GstElement * element, GstPad * pad,
+ GstCaps * caps)
+{
+ GValueArray *result;
+
+ /* return all compatible factories for caps */
+ result = find_compatibles (GST_DECODE_BIN (element), pad, caps);
+
+ GST_DEBUG_OBJECT (element, "autoplug-factories returns %p", result);
+
+ return result;
+}
+
+static GValueArray *
+gst_decode_bin_autoplug_sort (GstElement * element, GstPad * pad,
+ GstCaps * caps, GValueArray * factories)
+{
+ GValueArray *result;
+
+ result = g_value_array_copy (factories);
+
+ GST_DEBUG_OBJECT (element, "autoplug-sort returns %p", result);
+
+ /* return input */
+ return result;
+}
+
+static GstAutoplugSelectResult
+gst_decode_bin_autoplug_select (GstElement * element, GstPad * pad,
+ GstCaps * caps, GstElementFactory * factory)
+{
+ GST_DEBUG_OBJECT (element, "default autoplug-select returns TRY");
+
+ /* Try factory. */
+ return GST_AUTOPLUG_SELECT_TRY;
+}
+
+/********
+ * Discovery methods
+ *****/
+
+static gboolean are_raw_caps (GstDecodeBin * dbin, GstCaps * caps);
+static gboolean is_demuxer_element (GstElement * srcelement);
+
+static gboolean connect_pad (GstDecodeBin * dbin, GstElement * src,
+ GstPad * pad, GstCaps * caps, GValueArray * factories,
+ GstDecodeGroup * group);
+static gboolean connect_element (GstDecodeBin * dbin, GstElement * element,
+ GstDecodeGroup * group);
+static void expose_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
+ GstDecodeGroup * group);
+
+static void pad_added_group_cb (GstElement * element, GstPad * pad,
+ GstDecodeGroup * group);
+static void pad_removed_group_cb (GstElement * element, GstPad * pad,
+ GstDecodeGroup * group);
+static void no_more_pads_group_cb (GstElement * element,
+ GstDecodeGroup * group);
+static void pad_added_cb (GstElement * element, GstPad * pad,
+ GstDecodeBin * dbin);
+static void pad_removed_cb (GstElement * element, GstPad * pad,
+ GstDecodeBin * dbin);
+static void no_more_pads_cb (GstElement * element, GstDecodeBin * dbin);
+
+static GstDecodeGroup *get_current_group (GstDecodeBin * dbin);
+
+/* called when a new pad is discovered. It will perform some basic actions
+ * before trying to link something to it.
+ *
+ * - Check the caps, don't do anything when there are no caps or when they have
+ * no good type.
+ * - signal AUTOPLUG_CONTINUE to check if we need to continue autoplugging this
+ * pad.
+ * - if the caps are non-fixed, setup a handler to continue autoplugging when
+ * the caps become fixed (connect to notify::caps).
+ * - get list of factories to autoplug.
+ * - continue autoplugging to one of the factories.
+ */
+static void
+analyze_new_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
+ GstCaps * caps, GstDecodeGroup * group)
+{
+ gboolean apcontinue = TRUE;
+ GValueArray *factories = NULL, *result = NULL;
+
+ GST_DEBUG_OBJECT (dbin, "Pad %s:%s caps:%" GST_PTR_FORMAT,
+ GST_DEBUG_PAD_NAME (pad), caps);
+
+ if ((caps == NULL) || gst_caps_is_empty (caps))
+ goto unknown_type;
+
+ if (gst_caps_is_any (caps))
+ goto any_caps;
+
+ /* 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, pad, caps,
+ &apcontinue);
+
+ /* 1.a if autoplug-continue is FALSE or caps is a raw format, goto pad_is_final */
+ if ((!apcontinue) || are_raw_caps (dbin, caps))
+ goto expose_pad;
+
+ /* 1.b when the caps are not fixed yet, we can't be sure what element to
+ * connect. We delay autoplugging until the caps are fixed */
+ if (!gst_caps_is_fixed (caps))
+ goto non_fixed;
+
+ /* 1.c else get the factories and if there's no compatible factory goto
+ * unknown_type */
+ g_signal_emit (G_OBJECT (dbin),
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, pad, caps,
+ &factories);
+
+ /* NULL means that we can expose the pad */
+ if (factories == NULL)
+ goto expose_pad;
+
+ /* if the array is empty, we have an unknown type */
+ if (factories->n_values == 0) {
+ /* no compatible factories */
+ g_value_array_free (factories);
+ goto unknown_type;
+ }
+
+ /* 1.d sort some more. */
+ g_signal_emit (G_OBJECT (dbin),
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_SORT], 0, pad, caps, factories,
+ &result);
+ g_value_array_free (factories);
+ factories = result;
+
+ /* 1.e else continue autoplugging something from the list. */
+ GST_LOG_OBJECT (pad, "Let's continue discovery on this pad");
+ connect_pad (dbin, src, pad, caps, factories, group);
+
+ g_value_array_free (factories);
+
+ return;
+
+expose_pad:
+ {
+ GST_LOG_OBJECT (dbin, "Pad is final. autoplug-continue:%d", apcontinue);
+ expose_pad (dbin, src, pad, group);
+ return;
+ }
+unknown_type:
+ {
+ GST_LOG_OBJECT (pad, "Unknown type, firing signal");
+ g_signal_emit (G_OBJECT (dbin),
+ gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
+
+ /* Check if there are no pending groups, if so, remove fakesink */
+ if (dbin->groups == NULL)
+ remove_fakesink (dbin);
+
+ if (src == dbin->typefind) {
+ gchar *desc;
+
+ desc = gst_pb_utils_get_decoder_description (caps);
+ GST_ELEMENT_ERROR (dbin, STREAM, CODEC_NOT_FOUND,
+ (_("A %s plugin is required to play this stream, but not installed."),
+ desc),
+ ("No decoder to handle media type '%s'",
+ gst_structure_get_name (gst_caps_get_structure (caps, 0))));
+ g_free (desc);
+ }
+
+ gst_element_post_message (GST_ELEMENT_CAST (dbin),
+ gst_missing_decoder_message_new (GST_ELEMENT_CAST (dbin), caps));
+ return;
+ }
+non_fixed:
+ {
+ GST_DEBUG_OBJECT (pad, "pad has non-fixed caps delay autoplugging");
+ goto setup_caps_delay;
+ }
+any_caps:
+ {
+ GST_WARNING_OBJECT (pad,
+ "pad has ANY caps, not able to autoplug to anything");
+ goto setup_caps_delay;
+ }
+setup_caps_delay:
+ {
+ /* connect to caps notification */
+ if (group) {
+ GROUP_MUTEX_LOCK (group);
+ group->nbdynamic++;
+ GST_LOG ("Group %p has now %d dynamic elements", group, group->nbdynamic);
+ GROUP_MUTEX_UNLOCK (group);
+ g_signal_connect (G_OBJECT (pad), "notify::caps",
+ G_CALLBACK (caps_notify_group_cb), group);
+ } else
+ g_signal_connect (G_OBJECT (pad), "notify::caps",
+ G_CALLBACK (caps_notify_cb), dbin);
+ return;
+ }
+}
+
+
+/* connect_pad:
+ *
+ * Try to connect the given pad to an element created from one of the factories,
+ * and recursively.
+ *
+ * Returns TRUE if an element was properly created and linked
+ */
+static gboolean
+connect_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
+ GstCaps * caps, GValueArray * factories, GstDecodeGroup * group)
+{
+ gboolean res = FALSE;
+ GstPad *mqpad = NULL;
+
+ g_return_val_if_fail (factories != NULL, FALSE);
+ g_return_val_if_fail (factories->n_values > 0, FALSE);
+
+ GST_DEBUG_OBJECT (dbin, "pad %s:%s , group:%p",
+ GST_DEBUG_PAD_NAME (pad), group);
+
+ /* 1. is element demuxer or parser */
+ if (is_demuxer_element (src)) {
+ GST_LOG_OBJECT (src, "is a demuxer, connecting the pad through multiqueue");
+
+ if (!group)
+ if (!(group = get_current_group (dbin))) {
+ group = gst_decode_group_new (dbin, TRUE);
+ DECODE_BIN_LOCK (dbin);
+ dbin->groups = g_list_append (dbin->groups, group);
+ DECODE_BIN_UNLOCK (dbin);
+ }
+
+ if (!(mqpad = gst_decode_group_control_demuxer_pad (group, pad)))
+ goto beach;
+ src = group->multiqueue;
+ pad = mqpad;
+ }
+
+ /* 2. Try to create an element and link to it */
+ while (factories->n_values > 0) {
+ GstAutoplugSelectResult ret;
+ GstElementFactory *factory;
+ GstElement *element;
+ GstPad *sinkpad;
+
+ /* take first factory */
+ factory = g_value_get_object (g_value_array_get_nth (factories, 0));
+ /* Remove selected factory from the list. */
+ g_value_array_remove (factories, 0);
+
+ /* emit autoplug-select to see what we should do with it. */
+ g_signal_emit (G_OBJECT (dbin),
+ gst_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT],
+ 0, pad, 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, pad, group);
+ res = TRUE;
+ goto beach;
+ case GST_AUTOPLUG_SELECT_SKIP:
+ GST_DEBUG_OBJECT (dbin, "autoplug select requested skip");
+ continue;
+ default:
+ GST_WARNING_OBJECT (dbin, "autoplug select returned unhandled %d", ret);
+ break;
+ }
+
+ /* 2.1. 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_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_object_unref (element);
+ continue;
+ }
+
+ /* 2.5 ...and try to link */
+ if ((gst_pad_link (pad, sinkpad)) != GST_PAD_LINK_OK) {
+ GST_WARNING_OBJECT (dbin, "Link failed on pad %s:%s",
+ GST_DEBUG_PAD_NAME (sinkpad));
+ gst_element_set_state (element, GST_STATE_NULL);
+ gst_object_unref (sinkpad);
+ gst_bin_remove (GST_BIN (dbin), element);
+ continue;
+ }
+ gst_object_unref (sinkpad);
+ GST_LOG_OBJECT (dbin, "linked on pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ /* link this element further */
+ connect_element (dbin, element, group);
+
+ /* Bring the element to the state of the parent */
+ if ((gst_element_set_state (element,
+ GST_STATE_PAUSED)) == GST_STATE_CHANGE_FAILURE) {
+ GST_WARNING_OBJECT (dbin, "Couldn't set %s to PAUSED",
+ GST_ELEMENT_NAME (element));
+ gst_element_set_state (element, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (dbin), element);
+ continue;
+ }
+
+ res = TRUE;
+ break;
+ }
+
+beach:
+ if (mqpad)
+ gst_object_unref (mqpad);
+
+ return res;
+}
+
+static gboolean
+connect_element (GstDecodeBin * dbin, GstElement * element,
+ GstDecodeGroup * group)
+{
+ GList *pads;
+ gboolean res = TRUE;
+ gboolean dynamic = FALSE;
+ GList *to_connect = NULL;
+
+ GST_DEBUG_OBJECT (dbin, "Attempting to connect element %s [group:%p] further",
+ GST_ELEMENT_NAME (element), group);
+
+ /* 1. Loop over pad templates, grabbing existing pads along the way */
+ for (pads = GST_ELEMENT_GET_CLASS (element)->padtemplates; pads;
+ pads = g_list_next (pads)) {
+ GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
+ const gchar *templ_name;
+
+ /* we are only interested in source pads */
+ if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
+ continue;
+
+ templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
+ GST_DEBUG_OBJECT (dbin, "got a source pad template %s", templ_name);
+
+ /* figure out what kind of pad this is */
+ switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
+ case GST_PAD_ALWAYS:
+ {
+ /* get the pad that we need to autoplug */
+ GstPad *pad = gst_element_get_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_pad (element, templ_name);
+
+ if (pad) {
+ GST_DEBUG_OBJECT (dbin, "got the pad for sometimes template %s",
+ templ_name);
+ /* the pad is created, we need to autoplug it */
+ to_connect = g_list_prepend (to_connect, pad);
+ } else {
+ GST_DEBUG_OBJECT (dbin,
+ "did not get the sometimes pad of template %s", templ_name);
+ /* we have an element that will create dynamic pads */
+ dynamic = TRUE;
+ }
+ break;
+ }
+ case GST_PAD_REQUEST:
+ /* ignore request pads */
+ GST_DEBUG_OBJECT (dbin, "ignoring request padtemplate %s", templ_name);
+ break;
+ }
+ }
+
+ /* 2. if there are more potential pads, connect to relevent signals */
+ if (dynamic) {
+ if (group) {
+ GST_LOG ("Adding signals to element %s in group %p",
+ GST_ELEMENT_NAME (element), group);
+ GROUP_MUTEX_LOCK (group);
+ group->nbdynamic++;
+ GST_LOG ("Group %p has now %d dynamic elements", group, group->nbdynamic);
+ GROUP_MUTEX_UNLOCK (group);
+ g_signal_connect (G_OBJECT (element), "pad-added",
+ G_CALLBACK (pad_added_group_cb), group);
+ g_signal_connect (G_OBJECT (element), "pad-removed",
+ G_CALLBACK (pad_removed_group_cb), group);
+ g_signal_connect (G_OBJECT (element), "no-more-pads",
+ G_CALLBACK (no_more_pads_group_cb), group);
+ } else {
+ /* This is a non-grouped element, the handlers are different */
+ g_signal_connect (G_OBJECT (element), "pad-added",
+ G_CALLBACK (pad_added_cb), dbin);
+ g_signal_connect (G_OBJECT (element), "pad-removed",
+ G_CALLBACK (pad_removed_cb), dbin);
+ g_signal_connect (G_OBJECT (element), "no-more-pads",
+ G_CALLBACK (no_more_pads_cb), dbin);
+ }
+ }
+
+ /* 3. for every available pad, connect it */
+ for (pads = to_connect; pads; pads = g_list_next (pads)) {
+ GstPad *pad = GST_PAD_CAST (pads->data);
+ GstCaps *caps;
+
+ caps = gst_pad_get_caps (pad);
+ analyze_new_pad (dbin, element, pad, caps, group);
+ if (caps)
+ gst_caps_unref (caps);
+
+ gst_object_unref (pad);
+ }
+ g_list_free (to_connect);
+
+ return res;
+}
+
+/* expose_pad:
+ *
+ * Expose the given pad on the group as a decoded pad.
+ * If group is NULL, a GstDecodeGroup will be created and setup properly.
+ */
+static void
+expose_pad (GstDecodeBin * dbin, GstElement * src, GstPad * pad,
+ GstDecodeGroup * group)
+{
+ gboolean newgroup = FALSE;
+ gboolean isdemux;
+ GstPad *mqpad = NULL;
+
+ GST_DEBUG_OBJECT (dbin, "pad %s:%s, group:%p",
+ GST_DEBUG_PAD_NAME (pad), group);
+
+ isdemux = is_demuxer_element (src);
+
+ if (!group)
+ if (!(group = get_current_group (dbin))) {
+ group = gst_decode_group_new (dbin, isdemux);
+ DECODE_BIN_LOCK (dbin);
+ dbin->groups = g_list_append (dbin->groups, group);
+ DECODE_BIN_UNLOCK (dbin);
+ newgroup = TRUE;
+ }
+
+ if (isdemux) {
+ GST_LOG_OBJECT (src, "connecting the pad through multiqueue");
+
+ if (!(mqpad = gst_decode_group_control_demuxer_pad (group, pad)))
+ goto beach;
+ pad = mqpad;
+ }
+
+ gst_decode_group_control_source_pad (group, pad);
+
+ if (newgroup && !isdemux) {
+ /* If we have discovered a raw pad and it doesn't belong to any group,
+ * that means there wasn't any demuxer. In that case, we consider the
+ * group as being complete. */
+ gst_decode_group_set_complete (group);
+ }
+ if (mqpad)
+ gst_object_unref (mqpad);
+
+beach:
+ return;
+}
+
+static void
+type_found (GstElement * typefind, guint probability,
+ GstCaps * caps, GstDecodeBin * decode_bin)
+{
+ GstPad *pad;
+
+ GST_DEBUG_OBJECT (decode_bin, "typefind found caps %" GST_PTR_FORMAT, caps);
+
+ /* we can only deal with one type, we don't yet support dynamically changing
+ * caps from the typefind element */
+ if (decode_bin->have_type)
+ goto exit;
+
+ decode_bin->have_type = TRUE;
+
+ pad = gst_element_get_static_pad (typefind, "src");
+
+ analyze_new_pad (decode_bin, typefind, pad, caps, NULL);
+
+ gst_object_unref (pad);
+
+exit:
+ return;
+}
+
+static void
+pad_added_group_cb (GstElement * element, GstPad * pad, GstDecodeGroup * group)
+{
+ GstCaps *caps;
+ gboolean expose = FALSE;
+
+ GST_DEBUG_OBJECT (pad, "pad added, group:%p", group);
+
+ caps = gst_pad_get_caps (pad);
+ analyze_new_pad (group->dbin, element, pad, caps, group);
+ if (caps)
+ gst_caps_unref (caps);
+
+ GROUP_MUTEX_LOCK (group);
+ group->nbdynamic--;
+ GST_LOG ("Group %p has now %d dynamic objects", group, group->nbdynamic);
+ if (group->nbdynamic == 0)
+ expose = TRUE;
+ GROUP_MUTEX_UNLOCK (group);
+
+ if (expose) {
+ GST_LOG
+ ("That was the last dynamic object, now attempting to expose the group");
+ DECODE_BIN_LOCK (group->dbin);
+ gst_decode_group_expose (group);
+ DECODE_BIN_UNLOCK (group->dbin);
+ }
+}
+
+static void
+pad_removed_group_cb (GstElement * element, GstPad * pad,
+ GstDecodeGroup * group)
+{
+ GST_LOG_OBJECT (pad, "pad removed, group:%p", group);
+
+ /* In fact, we don't have to do anything here, the active group will be
+ * removed when the group's multiqueue is drained */
+}
+
+static void
+no_more_pads_group_cb (GstElement * element, GstDecodeGroup * group)
+{
+ GST_LOG_OBJECT (element, "no more pads, setting group %p to complete", group);
+
+ /* FIXME : FILLME */
+ gst_decode_group_set_complete (group);
+}
+
+static void
+pad_added_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin)
+{
+ GstCaps *caps;
+
+ GST_LOG_OBJECT (pad, "Pad added to non-grouped element");
+
+ caps = gst_pad_get_caps (pad);
+ analyze_new_pad (dbin, element, pad, caps, NULL);
+ if (caps)
+ gst_caps_unref (caps);
+}
+
+static void
+pad_removed_cb (GstElement * element, GstPad * pad, GstDecodeBin * dbin)
+{
+ GST_LOG_OBJECT (pad, "Pad removed from non-grouped element");
+}
+
+static void
+no_more_pads_cb (GstElement * element, GstDecodeBin * dbin)
+{
+ GstDecodeGroup *group;
+
+ GST_LOG_OBJECT (element, "No more pads, setting current group to complete");
+
+ /* Find the non-complete group, there should only be one */
+ if (!(group = get_current_group (dbin)))
+ goto no_group;
+
+ gst_decode_group_set_complete (group);
+ return;
+
+no_group:
+ {
+ GST_WARNING_OBJECT (dbin, "We couldn't find a non-completed group !!");
+ return;
+ }
+}
+
+static void
+caps_notify_cb (GstPad * pad, GParamSpec * unused, GstDecodeBin * dbin)
+{
+ GstElement *element;
+
+ GST_LOG_OBJECT (dbin, "Notified caps for pad %s:%s",
+ GST_DEBUG_PAD_NAME (pad));
+
+ element = GST_ELEMENT_CAST (gst_pad_get_parent (pad));
+
+ pad_added_cb (element, pad, dbin);
+
+ gst_object_unref (element);
+}
+
+static void
+caps_notify_group_cb (GstPad * pad, GParamSpec * unused, GstDecodeGroup * group)
+{
+ GstElement *element;
+
+ GST_LOG_OBJECT (pad, "Notified caps for pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ element = GST_ELEMENT_CAST (gst_pad_get_parent (pad));
+
+ pad_added_group_cb (element, pad, group);
+
+ gst_object_unref (element);
+}
+
+/* this function runs through the element factories and returns a value array of
+ * all elements that are able to sink the given caps
+ */
+static GValueArray *
+find_compatibles (GstDecodeBin * decode_bin, GstPad * pad, const GstCaps * caps)
+{
+ GValueArray *result;
+
+ GST_DEBUG_OBJECT (decode_bin, "finding factories");
+
+ result = gst_factory_list_filter (decode_bin->factories, caps);
+
+ return result;
+}
+
+/* Decide whether an element is a demuxer based on the
+ * klass and number/type of src pad templates it has */
+static gboolean
+is_demuxer_element (GstElement * srcelement)
+{
+ GstElementFactory *srcfactory;
+ GstElementClass *elemclass;
+ GList *templates, *walk;
+ const gchar *klass;
+ gint potential_src_pads = 0;
+
+ srcfactory = gst_element_get_factory (srcelement);
+ klass = gst_element_factory_get_klass (srcfactory);
+
+ /* Can't be a demuxer unless it has Demux in the klass name */
+ if (!strstr (klass, "Demux"))
+ return FALSE;
+
+ /* Walk the src pad templates and count how many the element
+ * might produce */
+ elemclass = GST_ELEMENT_GET_CLASS (srcelement);
+
+ walk = templates = gst_element_class_get_pad_template_list (elemclass);
+ while (walk != NULL) {
+ GstPadTemplate *templ;
+
+ templ = (GstPadTemplate *) walk->data;
+ if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
+ switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
+ case GST_PAD_ALWAYS:
+ case GST_PAD_SOMETIMES:
+ if (strstr (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), "%"))
+ potential_src_pads += 2; /* Might make multiple pads */
+ else
+ potential_src_pads += 1;
+ break;
+ case GST_PAD_REQUEST:
+ potential_src_pads += 2;
+ break;
+ }
+ }
+ walk = g_list_next (walk);
+ }
+
+ if (potential_src_pads < 2)
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Returns TRUE if the caps are raw, or if they are compatible with the caps
+ * specified in the 'caps' property
+ *
+ * The decodebin_lock should be taken !
+ */
+static gboolean
+are_raw_caps (GstDecodeBin * dbin, GstCaps * caps)
+{
+ GstCaps *intersection;
+ gboolean res;
+
+ GST_LOG_OBJECT (dbin, "Checking with caps %" GST_PTR_FORMAT, caps);
+
+ intersection = gst_caps_intersect (dbin->caps, caps);
+
+ res = (!(gst_caps_is_empty (intersection)));
+
+ gst_caps_unref (intersection);
+
+ GST_LOG_OBJECT (dbin, "Caps are %sfinal caps", res ? "" : "not ");
+
+ return res;
+}
+
+
+/****
+ * GstDecodeGroup functions
+ ****/
+
+static void
+multi_queue_overrun_cb (GstElement * queue, GstDecodeGroup * group)
+{
+ GST_LOG_OBJECT (group->dbin, "multiqueue is full");
+
+ /* if we haven't exposed the group, do it */
+ DECODE_BIN_LOCK (group->dbin);
+ gst_decode_group_expose (group);
+ DECODE_BIN_UNLOCK (group->dbin);
+}
+
+static void
+multi_queue_underrun_cb (GstElement * queue, GstDecodeGroup * group)
+{
+ GstDecodeBin *dbin = group->dbin;
+
+ GST_LOG_OBJECT (dbin, "multiqueue is empty for group %p", group);
+
+ /* Check if we need to activate another group */
+ DECODE_BIN_LOCK (dbin);
+ if ((group == dbin->activegroup) && dbin->groups) {
+ GST_DEBUG_OBJECT (dbin, "Switching to new group");
+ /* unexpose current active */
+ gst_decode_group_hide (group);
+
+ /* expose first group of groups */
+ gst_decode_group_expose ((GstDecodeGroup *) dbin->groups->data);
+ }
+ DECODE_BIN_UNLOCK (dbin);
+}
+
+/* gst_decode_group_new
+ *
+ * Creates a new GstDecodeGroup. It is up to the caller to add it to the list
+ * of groups.
+ */
+static GstDecodeGroup *
+gst_decode_group_new (GstDecodeBin * dbin, gboolean use_queue)
+{
+ GstDecodeGroup *group;
+ GstElement *mq;
+
+ GST_LOG_OBJECT (dbin, "Creating new group");
+
+ if (use_queue) {
+ if (!(mq = gst_element_factory_make ("multiqueue", NULL))) {
+ GST_WARNING ("Couldn't create multiqueue element");
+ return NULL;
+ }
+ } else {
+ mq = NULL;
+ }
+
+ group = g_new0 (GstDecodeGroup, 1);
+ group->lock = g_mutex_new ();
+ group->dbin = dbin;
+ group->multiqueue = mq;
+ group->exposed = FALSE;
+ group->drained = FALSE;
+ group->blocked = FALSE;
+ group->complete = FALSE;
+ group->endpads = NULL;
+ group->reqpads = NULL;
+
+ if (mq) {
+ /* we first configure the multiqueue to buffer an unlimited number of
+ * buffers up to 5 seconds or, when no timestamps are present, up to 2 MB of
+ * memory. When this queue overruns, we assume the group is complete and can
+ * be exposed. */
+ g_object_set (G_OBJECT (mq),
+ "max-size-bytes", 2 * 1024 * 1024,
+ "max-size-time", 5 * GST_SECOND, "max-size-buffers", 0, NULL);
+ /* will expose the group */
+ group->overrunsig = g_signal_connect (G_OBJECT (mq), "overrun",
+ G_CALLBACK (multi_queue_overrun_cb), group);
+ /* will hide the group again, this is usually called when the multiqueue is
+ * drained because of EOS. */
+ group->underrunsig = g_signal_connect (G_OBJECT (mq), "underrun",
+ G_CALLBACK (multi_queue_underrun_cb), group);
+
+ gst_bin_add (GST_BIN (dbin), mq);
+ gst_element_set_state (mq, GST_STATE_PAUSED);
+ }
+
+ GST_LOG_OBJECT (dbin, "Returning new group %p", group);
+
+ return group;
+}
+
+/** get_current_group:
+ *
+ * Returns the current non-completed group.
+ *
+ * Returns NULL if no groups are available, or all groups are completed.
+ */
+static GstDecodeGroup *
+get_current_group (GstDecodeBin * dbin)
+{
+ GList *tmp;
+ GstDecodeGroup *group = NULL;
+
+ DECODE_BIN_LOCK (dbin);
+ for (tmp = dbin->groups; tmp; tmp = g_list_next (tmp)) {
+ GstDecodeGroup *this = (GstDecodeGroup *) tmp->data;
+
+ GST_LOG_OBJECT (dbin, "group %p, complete:%d", this, this->complete);
+
+ if (!this->complete) {
+ group = this;
+ break;
+ }
+ }
+ DECODE_BIN_UNLOCK (dbin);
+
+ GST_LOG_OBJECT (dbin, "Returning group %p", group);
+
+ return group;
+}
+
+static gboolean
+group_demuxer_event_probe (GstPad * pad, GstEvent * event,
+ GstDecodeGroup * group)
+{
+ if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
+ GST_DEBUG_OBJECT (group->dbin,
+ "Got EOS on group input pads, exposing group if it wasn't before");
+ DECODE_BIN_LOCK (group->dbin);
+ gst_decode_group_expose (group);
+ DECODE_BIN_UNLOCK (group->dbin);
+ }
+ return TRUE;
+}
+
+/* gst_decode_group_control_demuxer_pad
+ *
+ * Adds a new demuxer srcpad to the given group.
+ *
+ * Returns the srcpad of the multiqueue corresponding the given pad.
+ * Returns NULL if there was an error.
+ */
+static GstPad *
+gst_decode_group_control_demuxer_pad (GstDecodeGroup * group, GstPad * pad)
+{
+ GstPad *srcpad, *sinkpad;
+ gchar *nb, *sinkname, *srcname;
+
+ GST_LOG ("group:%p pad %s:%s", group, GST_DEBUG_PAD_NAME (pad));
+
+ srcpad = NULL;
+
+ if (!(sinkpad = gst_element_get_request_pad (group->multiqueue, "sink%d"))) {
+ GST_ERROR ("Couldn't get sinkpad from multiqueue");
+ return NULL;
+ }
+
+ if ((gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK)) {
+ GST_ERROR ("Couldn't link demuxer and multiqueue");
+ goto beach;
+ }
+
+ group->reqpads = g_list_append (group->reqpads, sinkpad);
+
+ sinkname = gst_pad_get_name (sinkpad);
+ nb = sinkname + 4;
+ srcname = g_strdup_printf ("src%s", nb);
+ g_free (sinkname);
+
+ GROUP_MUTEX_LOCK (group);
+
+ if (!(srcpad = gst_element_get_pad (group->multiqueue, srcname))) {
+ GST_ERROR ("Couldn't get srcpad %s from multiqueue", srcname);
+ goto chiringuito;
+ }
+
+ /* connect event handler on pad to intercept EOS events */
+ gst_pad_add_event_probe (pad, G_CALLBACK (group_demuxer_event_probe), group);
+
+chiringuito:
+ g_free (srcname);
+ GROUP_MUTEX_UNLOCK (group);
+
+beach:
+ gst_object_unref (sinkpad);
+ return srcpad;
+}
+
+static gboolean
+gst_decode_group_control_source_pad (GstDecodeGroup * group, GstPad * pad)
+{
+ GstDecodePad *dpad;
+
+ g_return_val_if_fail (group != NULL, FALSE);
+
+ GST_LOG ("group:%p , pad %s:%s", group, GST_DEBUG_PAD_NAME (pad));
+
+ /* FIXME : check if pad is already controlled */
+
+ GROUP_MUTEX_LOCK (group);
+
+ /* Create GstDecodePad for the pad */
+ dpad = gst_decode_pad_new (group, pad, TRUE);
+
+ group->endpads = g_list_append (group->endpads, dpad);
+
+ GROUP_MUTEX_UNLOCK (group);
+
+ return TRUE;
+}
+
+/* gst_decode_group_check_if_blocked:
+ *
+ * Call this when one of the pads blocked status has changed.
+ * If the group is complete and blocked, the group will be marked as blocked
+ * and will ghost/expose all pads on decodebin if the group is the current one.
+ *
+ * Call with the group lock taken ! MT safe
+ */
+static void
+gst_decode_group_check_if_blocked (GstDecodeGroup * group)
+{
+ GList *tmp;
+ gboolean blocked = TRUE;
+
+ GST_LOG ("group : %p , ->complete:%d , ->nbdynamic:%d",
+ group, group->complete, group->nbdynamic);
+
+ /* 1. don't do anything if group is not complete */
+ if (!group->complete || group->nbdynamic) {
+ GST_DEBUG_OBJECT (group->dbin, "Group isn't complete yet");
+ return;
+ }
+
+ for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) {
+ GstDecodePad *dpad = (GstDecodePad *) tmp->data;
+
+ if (!dpad->blocked) {
+ blocked = FALSE;
+ break;
+ }
+ }
+
+ /* 2. Update status of group */
+ group->blocked = blocked;
+ GST_LOG ("group is blocked:%d", blocked);
+
+ /* 3. don't do anything if not blocked completely */
+ if (!blocked)
+ return;
+
+ /* 4. if we're the current group, expose pads */
+ DECODE_BIN_LOCK (group->dbin);
+ if (!gst_decode_group_expose (group))
+ GST_WARNING_OBJECT (group->dbin, "Couldn't expose group");
+ DECODE_BIN_UNLOCK (group->dbin);
+}
+
+static void
+gst_decode_group_check_if_drained (GstDecodeGroup * group)
+{
+ GList *tmp;
+ GstDecodeBin *dbin = group->dbin;
+ gboolean drained = TRUE;
+
+ GST_LOG ("group : %p", group);
+
+ for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) {
+ GstDecodePad *dpad = (GstDecodePad *) tmp->data;
+
+ GST_LOG ("testing dpad %p", dpad);
+
+ if (!dpad->drained) {
+ drained = FALSE;
+ break;
+ }
+ }
+
+ group->drained = drained;
+ if (!drained)
+ return;
+
+ /* we are drained. Check if there is a next group to activate */
+ DECODE_BIN_LOCK (dbin);
+ if ((group == dbin->activegroup) && dbin->groups) {
+ GST_DEBUG_OBJECT (dbin, "Switching to new group");
+
+ /* hide current group */
+ gst_decode_group_hide (group);
+ /* expose next group */
+ gst_decode_group_expose ((GstDecodeGroup *) dbin->groups->data);
+ /* we're not yet drained now */
+ drained = FALSE;
+ }
+ DECODE_BIN_UNLOCK (dbin);
+
+ if (drained) {
+ /* no more groups to activate, we're completely drained now */
+ GST_LOG ("all groups drained, fire signal");
+ g_signal_emit (G_OBJECT (dbin), gst_decode_bin_signals[SIGNAL_DRAINED], 0,
+ NULL);
+ }
+}
+
+/* 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)
+{
+ GstPad *a, *b;
+ gint va, vb;
+ GstCaps *capsa, *capsb;
+ GstStructure *sa, *sb;
+ const gchar *namea, *nameb;
+
+ a = da->pad;
+ b = db->pad;
+
+ capsa = gst_pad_get_caps (a);
+ capsb = gst_pad_get_caps (b);
+
+ sa = gst_caps_get_structure ((const GstCaps *) capsa, 0);
+ sb = gst_caps_get_structure ((const GstCaps *) capsb, 0);
+
+ namea = gst_structure_get_name (sa);
+ nameb = gst_structure_get_name (sb);
+
+ if (g_strrstr (namea, "video/x-raw-"))
+ va = 0;
+ else if (g_strrstr (namea, "video/"))
+ va = 1;
+ else if (g_strrstr (namea, "audio/x-raw"))
+ va = 2;
+ else if (g_strrstr (namea, "audio/"))
+ va = 3;
+ else
+ va = 4;
+
+ if (g_strrstr (nameb, "video/x-raw-"))
+ vb = 0;
+ else if (g_strrstr (nameb, "video/"))
+ vb = 1;
+ else if (g_strrstr (nameb, "audio/x-raw"))
+ vb = 2;
+ else if (g_strrstr (nameb, "audio/"))
+ vb = 3;
+ else
+ vb = 4;
+
+ gst_caps_unref (capsa);
+ gst_caps_unref (capsb);
+
+ return va - vb;
+}
+
+/* gst_decode_group_expose:
+ *
+ * Expose this group's pads.
+ *
+ * Not MT safe, please take the group lock
+ */
+static gboolean
+gst_decode_group_expose (GstDecodeGroup * group)
+{
+ GList *tmp;
+ GList *next = NULL;
+
+ if (group->dbin->activegroup) {
+ GST_DEBUG_OBJECT (group->dbin, "A group is already active and exposed");
+ return TRUE;
+ }
+
+ if (group->dbin->activegroup == group) {
+ GST_WARNING ("Group %p is already exposed", group);
+ return TRUE;
+ }
+
+ if (!group->dbin->groups
+ || (group != (GstDecodeGroup *) group->dbin->groups->data)) {
+ GST_WARNING ("Group %p is not the first group to expose", group);
+ return FALSE;
+ }
+
+ if (group->nbdynamic) {
+ GST_WARNING ("Group %p still has %d dynamic objects, not exposing yet",
+ group, group->nbdynamic);
+ return FALSE;
+ }
+
+ GST_LOG ("Exposing group %p", group);
+
+ if (group->multiqueue) {
+ /* update runtime limits. At runtime, we try to keep the amount of buffers
+ * in the queues as low as possible (but at least 5 buffers). */
+ g_object_set (G_OBJECT (group->multiqueue),
+ "max-size-bytes", 2 * 1024 * 1024,
+ "max-size-time", 2 * GST_SECOND, "max-size-buffers", 5, NULL);
+ /* we can now disconnect any overrun signal, which is used to expose the
+ * group. */
+ if (group->overrunsig) {
+ GST_LOG ("Disconnecting overrun");
+ g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
+ group->overrunsig = 0;
+ }
+ }
+
+ /* re-order pads : video, then audio, then others */
+ group->endpads = g_list_sort (group->endpads, (GCompareFunc) sort_end_pads);
+
+ /* Expose pads */
+
+ for (tmp = group->endpads; tmp; tmp = next) {
+ GstDecodePad *dpad = (GstDecodePad *) tmp->data;
+ gchar *padname;
+ GstPad *ghost;
+
+ next = g_list_next (tmp);
+
+ /* 1. ghost pad */
+ padname = g_strdup_printf ("src%d", group->dbin->nbpads);
+ group->dbin->nbpads++;
+
+ GST_LOG_OBJECT (group->dbin, "About to expose pad %s:%s",
+ GST_DEBUG_PAD_NAME (dpad->pad));
+
+ ghost = gst_ghost_pad_new (padname, dpad->pad);
+ gst_pad_set_active (ghost, TRUE);
+ gst_element_add_pad (GST_ELEMENT (group->dbin), ghost);
+ group->ghosts = g_list_append (group->ghosts, ghost);
+
+ g_free (padname);
+
+ /* 2. emit signal */
+ GST_DEBUG_OBJECT (group->dbin, "emitting new-decoded-pad");
+ g_signal_emit (G_OBJECT (group->dbin),
+ gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, ghost,
+ (next == NULL));
+ GST_DEBUG_OBJECT (group->dbin, "emitted new-decoded-pad");
+ }
+
+ /* signal no-more-pads. This allows the application to hook stuff to the
+ * exposed pads */
+ GST_LOG_OBJECT (group->dbin, "signalling no-more-pads");
+ gst_element_no_more_pads (GST_ELEMENT (group->dbin));
+
+ /* 3. Unblock internal pads. The application should have connected stuff now
+ * so that streaming can continue. */
+ for (tmp = group->endpads; tmp; tmp = next) {
+ GstDecodePad *dpad = (GstDecodePad *) tmp->data;
+
+ next = g_list_next (tmp);
+
+ GST_DEBUG_OBJECT (dpad->pad, "unblocking");
+ gst_pad_set_blocked_async (dpad->pad, FALSE,
+ (GstPadBlockCallback) source_pad_blocked_cb, dpad);
+ GST_DEBUG_OBJECT (dpad->pad, "unblocked");
+ }
+
+ group->dbin->activegroup = group;
+
+ /* pop off the first group */
+ group->dbin->groups =
+ g_list_delete_link (group->dbin->groups, group->dbin->groups);
+
+ remove_fakesink (group->dbin);
+
+ group->exposed = TRUE;
+
+ GST_LOG_OBJECT (group->dbin, "Group %p exposed", group);
+ return TRUE;
+}
+
+static void
+gst_decode_group_hide (GstDecodeGroup * group)
+{
+ GList *tmp;
+
+ GST_LOG ("Hiding group %p", group);
+
+ if (group != group->dbin->activegroup) {
+ GST_WARNING ("This group is not the active one, aborting");
+ return;
+ }
+
+ GROUP_MUTEX_LOCK (group);
+
+ /* Remove ghost pads */
+ for (tmp = group->ghosts; tmp; tmp = g_list_next (tmp))
+ gst_element_remove_pad (GST_ELEMENT (group->dbin), (GstPad *) tmp->data);
+
+ g_list_free (group->ghosts);
+ group->ghosts = NULL;
+
+ group->exposed = FALSE;
+
+ GROUP_MUTEX_UNLOCK (group);
+
+ group->dbin->activegroup = NULL;
+ group->dbin->oldgroups = g_list_append (group->dbin->oldgroups, group);
+}
+
+static void
+deactivate_free_recursive (GstDecodeGroup * group, GstElement * element)
+{
+ GstIterator *it;
+ GstIteratorResult res;
+ gpointer point;
+
+ GST_LOG ("element:%s", GST_ELEMENT_NAME (element));
+
+ /* call on downstream elements */
+ it = gst_element_iterate_src_pads (element);
+
+restart:
+
+ while (1) {
+ res = gst_iterator_next (it, &point);
+ switch (res) {
+ case GST_ITERATOR_DONE:
+ goto done;
+ case GST_ITERATOR_RESYNC:
+ gst_iterator_resync (it);
+ goto restart;
+ case GST_ITERATOR_ERROR:
+ {
+ GST_WARNING ("Had an error while iterating source pads of element: %s",
+ GST_ELEMENT_NAME (element));
+ goto beach;
+ }
+ case GST_ITERATOR_OK:
+ {
+ GstPad *pad = GST_PAD (point);
+ GstPad *peerpad = NULL;
+
+ if ((peerpad = gst_pad_get_peer (pad))) {
+ GstObject *parent;
+
+ parent = gst_pad_get_parent (peerpad);
+ gst_object_unref (peerpad);
+
+ if (parent && GST_IS_ELEMENT (parent))
+ deactivate_free_recursive (group, GST_ELEMENT (parent));
+ if (parent)
+ gst_object_unref (parent);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+done:
+ gst_element_set_state (element, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (group->dbin), element);
+
+beach:
+ gst_iterator_free (it);
+
+ return;
+}
+
+static void
+gst_decode_group_free (GstDecodeGroup * group)
+{
+ GList *tmp;
+
+ GST_LOG ("group %p", group);
+
+ GROUP_MUTEX_LOCK (group);
+
+ /* free ghost pads */
+ if (group == group->dbin->activegroup) {
+ for (tmp = group->ghosts; tmp; tmp = g_list_next (tmp))
+ gst_element_remove_pad (GST_ELEMENT (group->dbin), (GstPad *) tmp->data);
+
+ g_list_free (group->ghosts);
+ group->ghosts = NULL;
+ }
+
+ /* Clear all GstDecodePad */
+ for (tmp = group->endpads; tmp; tmp = g_list_next (tmp)) {
+ GstDecodePad *dpad = (GstDecodePad *) tmp->data;
+
+ g_free (dpad);
+ }
+ g_list_free (group->endpads);
+ group->endpads = NULL;
+
+ /* release request pads */
+ for (tmp = group->reqpads; tmp; tmp = g_list_next (tmp)) {
+ gst_element_release_request_pad (group->multiqueue, GST_PAD (tmp->data));
+ }
+ g_list_free (group->reqpads);
+ group->reqpads = NULL;
+
+ /* disconnect signal handlers on multiqueue */
+ if (group->multiqueue) {
+ if (group->underrunsig)
+ g_signal_handler_disconnect (group->multiqueue, group->underrunsig);
+ if (group->overrunsig)
+ g_signal_handler_disconnect (group->multiqueue, group->overrunsig);
+ deactivate_free_recursive (group, group->multiqueue);
+ }
+
+ /* remove all elements */
+
+ GROUP_MUTEX_UNLOCK (group);
+
+ g_mutex_free (group->lock);
+ g_free (group);
+}
+
+/* gst_decode_group_set_complete:
+ *
+ * Mark the group as complete. This means no more streams will be controlled
+ * through this group.
+ *
+ * MT safe
+ */
+static void
+gst_decode_group_set_complete (GstDecodeGroup * group)
+{
+ GST_LOG_OBJECT (group->dbin, "Setting group %p to COMPLETE", group);
+
+ GROUP_MUTEX_LOCK (group);
+ group->complete = TRUE;
+ gst_decode_group_check_if_blocked (group);
+ GROUP_MUTEX_UNLOCK (group);
+}
+
+
+
+/*************************
+ * GstDecodePad functions
+ *************************/
+
+static void
+source_pad_blocked_cb (GstPad * pad, gboolean blocked, GstDecodePad * dpad)
+{
+ GST_LOG_OBJECT (pad, "blocked:%d , dpad:%p, dpad->group:%p",
+ blocked, dpad, dpad->group);
+
+ /* Update this GstDecodePad status */
+ dpad->blocked = blocked;
+
+ if (blocked) {
+ GROUP_MUTEX_LOCK (dpad->group);
+ gst_decode_group_check_if_blocked (dpad->group);
+ GROUP_MUTEX_UNLOCK (dpad->group);
+ }
+}
+
+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) {
+ /* Set our pad as drained */
+ dpad->drained = TRUE;
+
+ 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_group_check_if_drained (dpad->group);
+ }
+ /* never drop events */
+ return TRUE;
+}
+
+/*gst_decode_pad_new:
+ *
+ * Creates a new GstDecodePad for the given pad.
+ * If block is TRUE, Sets the pad blocking asynchronously
+ */
+static GstDecodePad *
+gst_decode_pad_new (GstDecodeGroup * group, GstPad * pad, gboolean block)
+{
+ GstDecodePad *dpad;
+
+ dpad = g_new0 (GstDecodePad, 1);
+ dpad->pad = pad;
+ dpad->group = group;
+ dpad->blocked = FALSE;
+ dpad->drained = TRUE;
+
+ if (block)
+ gst_pad_set_blocked_async (pad, TRUE,
+ (GstPadBlockCallback) source_pad_blocked_cb, dpad);
+ gst_pad_add_event_probe (pad, G_CALLBACK (source_pad_event_probe), dpad);
+ return dpad;
+}
+
+
+/*****
+ * Element add/remove
+ *****/
+
+/*
+ * add_fakesink / remove_fakesink
+ *
+ * We use a sink so that the parent ::change_state returns GST_STATE_CHANGE_ASYNC
+ * when that sink is present (since it's not connected to anything it will
+ * always return GST_STATE_CHANGE_ASYNC).
+ *
+ * But this is an ugly way of achieving this goal.
+ * Ideally, we shouldn't use a sink and just return GST_STATE_CHANGE_ASYNC in
+ * our ::change_state if we have not exposed the active group.
+ * We also need to override ::get_state to fake the asynchronous behaviour.
+ * Once the active group is exposed, we would then post a
+ * GST_MESSAGE_STATE_DIRTY and return GST_STATE_CHANGE_SUCCESS (which will call
+ * ::get_state .
+ */
+
+static gboolean
+add_fakesink (GstDecodeBin * decode_bin)
+{
+ GST_DEBUG_OBJECT (decode_bin, "Adding the fakesink");
+
+ if (decode_bin->fakesink)
+ return TRUE;
+
+ decode_bin->fakesink =
+ gst_element_factory_make ("fakesink", "async-fakesink");
+ if (!decode_bin->fakesink)
+ goto no_fakesink;
+
+ /* enable sync so that we force ASYNC preroll */
+ g_object_set (G_OBJECT (decode_bin->fakesink), "sync", TRUE, NULL);
+
+ /* hacky, remove sink flag, we don't want our decodebin to become a sink
+ * just because we add a fakesink element to make us ASYNC */
+ GST_OBJECT_FLAG_UNSET (decode_bin->fakesink, GST_ELEMENT_IS_SINK);
+
+ if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->fakesink))
+ goto could_not_add;
+
+ return TRUE;
+
+ /* ERRORS */
+no_fakesink:
+ {
+ g_warning ("can't find fakesink element, decodebin will not work");
+ return FALSE;
+ }
+could_not_add:
+ {
+ g_warning ("Could not add fakesink to decodebin, decodebin will not work");
+ gst_object_unref (decode_bin->fakesink);
+ decode_bin->fakesink = NULL;
+ return FALSE;
+ }
+}
+
+static void
+remove_fakesink (GstDecodeBin * decode_bin)
+{
+ if (decode_bin->fakesink == NULL)
+ return;
+
+ GST_DEBUG_OBJECT (decode_bin, "Removing the fakesink");
+
+ gst_element_set_state (decode_bin->fakesink, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (decode_bin), decode_bin->fakesink);
+ decode_bin->fakesink = NULL;
+}
+
+/*****
+ * 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;
+}
+
+static GstStateChangeReturn
+gst_decode_bin_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret;
+ 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:{
+ dbin->have_type = FALSE;
+ if (!add_fakesink (dbin))
+ goto missing_fakesink;
+ break;
+ }
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ /* FIXME : put some cleanup functions here.. if needed */
+
+ 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;
+ }
+missing_fakesink:
+ {
+ gst_element_post_message (element,
+ gst_missing_element_message_new (element, "fakesink"));
+ GST_ELEMENT_ERROR (dbin, CORE, MISSING_PLUGIN, (NULL), ("no fakesink!"));
+ return GST_STATE_CHANGE_FAILURE;
+ }
+}
+
+static 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);
+#endif /* ENABLE_NLS */
+
+ return gst_element_register (plugin, "decodebin2", GST_RANK_NONE,
+ GST_TYPE_DECODE_BIN);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "decodebin2",
+ "decoder bin2", gst_decode_bin_plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
+ GST_PACKAGE_ORIGIN);
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+GstPluginDesc* _GST_PLUGIN_DESC()
+{
+ return &gst_plugin_desc;
+}