plugins/elements/gstfunnel.c - mtk-gstreamer-debian - Git at Google

 /*
  * GStreamer Funnel element
  *
  * Copyright 2007 Collabora Ltd.
  *  @author: Olivier Crete <olivier.crete@collabora.co.uk>
  * Copyright 2007 Nokia Corp.
  *
  * gstfunnel.c: Simple Funnel element
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  */

 /**
  * SECTION:element-funnel
  *
  * Takes packets from various input sinks into one output source.
  *
  * funnel always outputs a single, open ended segment from
  * 0 with in %GST_FORMAT_TIME and outputs the buffers of the
  * different sinkpads with timestamps that are set to the
  * running time for that stream. funnel does not synchronize
  * the different input streams but simply forwards all buffers
  * immediately when they arrive.
  *
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include "gstfunnel.h"

 GST_DEBUG_CATEGORY_STATIC (gst_funnel_debug);
 #define GST_CAT_DEFAULT gst_funnel_debug

 GType gst_funnel_pad_get_type (void);
 #define GST_TYPE_FUNNEL_PAD \
   (gst_funnel_pad_get_type())
 #define GST_FUNNEL_PAD(obj) \
   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FUNNEL_PAD, GstFunnelPad))
 #define GST_FUNNEL_PAD_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FUNNEL_PAD, GstFunnelPadClass))
 #define GST_IS_FUNNEL_PAD(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FUNNEL_PAD))
 #define GST_IS_FUNNEL_PAD_CLASS(klass) \
   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FUNNEL_PAD))
 #define GST_FUNNEL_PAD_CAST(obj) \
   ((GstFunnelPad *)(obj))

 typedef struct _GstFunnelPad GstFunnelPad;
 typedef struct _GstFunnelPadClass GstFunnelPadClass;

 struct _GstFunnelPad
 {
   GstPad parent;

   GstSegment segment;
   gboolean got_eos;
 };

 struct _GstFunnelPadClass
 {
   GstPadClass parent;
 };

 G_DEFINE_TYPE (GstFunnelPad, gst_funnel_pad, GST_TYPE_PAD);

 static void
 gst_funnel_pad_class_init (GstFunnelPadClass * klass)
 {
 }

 static void
 gst_funnel_pad_reset (GstFunnelPad * pad)
 {
   gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
   pad->got_eos = FALSE;
 }

 static void
 gst_funnel_pad_init (GstFunnelPad * pad)
 {
   gst_funnel_pad_reset (pad);
 }

 static GstStaticPadTemplate funnel_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink_%u",
     GST_PAD_SINK,
     GST_PAD_REQUEST,
     GST_STATIC_CAPS_ANY);

 static GstStaticPadTemplate funnel_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);

 #define _do_init \
   GST_DEBUG_CATEGORY_INIT (gst_funnel_debug, "funnel", 0, "funnel element");
 #define gst_funnel_parent_class parent_class
 G_DEFINE_TYPE_WITH_CODE (GstFunnel, gst_funnel, GST_TYPE_ELEMENT, _do_init);

 static GstStateChangeReturn gst_funnel_change_state (GstElement * element,
     GstStateChange transition);
 static GstPad *gst_funnel_request_new_pad (GstElement * element,
     GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
 static void gst_funnel_release_pad (GstElement * element, GstPad * pad);

 static GstFlowReturn gst_funnel_sink_chain (GstPad * pad, GstObject * parent,
     GstBuffer * buffer);
 static gboolean gst_funnel_sink_event (GstPad * pad, GstObject * parent,
     GstEvent * event);
 static gboolean gst_funnel_sink_query (GstPad * pad, GstObject * parent,
     GstQuery * query);

 static gboolean gst_funnel_src_event (GstPad * pad, GstObject * parent,
     GstEvent * event);

 static void
 gst_funnel_dispose (GObject * object)
 {
   GList *item;

 restart:
   for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
     GstPad *pad = GST_PAD (item->data);

     if (GST_PAD_IS_SINK (pad)) {
       gst_element_release_request_pad (GST_ELEMENT (object), pad);
       goto restart;
     }
   }

   G_OBJECT_CLASS (parent_class)->dispose (object);
 }

 static void
 gst_funnel_class_init (GstFunnelClass * klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

   gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_funnel_dispose);

   gst_element_class_set_static_metadata (gstelement_class,
       "Funnel pipe fitting", "Generic", "N-to-1 pipe fitting",
       "Olivier Crete <olivier.crete@collabora.co.uk>");

   gst_element_class_add_pad_template (gstelement_class,
       gst_static_pad_template_get (&funnel_sink_template));
   gst_element_class_add_pad_template (gstelement_class,
       gst_static_pad_template_get (&funnel_src_template));

   gstelement_class->request_new_pad =
       GST_DEBUG_FUNCPTR (gst_funnel_request_new_pad);
   gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_funnel_release_pad);
   gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_funnel_change_state);
 }

 static void
 gst_funnel_init (GstFunnel * funnel)
 {
   funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
       "src");
   gst_pad_set_event_function (funnel->srcpad, gst_funnel_src_event);
   gst_pad_use_fixed_caps (funnel->srcpad);
   gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
 }

 static GstPad *
 gst_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
     const gchar * name, const GstCaps * caps)
 {
   GstPad *sinkpad;

   GST_DEBUG_OBJECT (element, "requesting pad");

   sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_FUNNEL_PAD,
           "name", name, "direction", templ->direction, "template", templ,
           NULL));

   gst_pad_set_chain_function (sinkpad,
       GST_DEBUG_FUNCPTR (gst_funnel_sink_chain));
   gst_pad_set_event_function (sinkpad,
       GST_DEBUG_FUNCPTR (gst_funnel_sink_event));
   gst_pad_set_query_function (sinkpad,
       GST_DEBUG_FUNCPTR (gst_funnel_sink_query));

   gst_pad_set_active (sinkpad, TRUE);

   gst_element_add_pad (element, sinkpad);

   return sinkpad;
 }

 static gboolean
 gst_funnel_all_sinkpads_eos_unlocked (GstFunnel * funnel)
 {
   GstElement *element = GST_ELEMENT_CAST (funnel);
   GList *item;

   if (element->numsinkpads == 0)
     return FALSE;

   for (item = element->sinkpads; item != NULL; item = g_list_next (item)) {
     GstFunnelPad *sinkpad = item->data;

     if (!sinkpad->got_eos)
       return FALSE;
   }

   return TRUE;
 }

 static void
 gst_funnel_release_pad (GstElement * element, GstPad * pad)
 {
   GstFunnel *funnel = GST_FUNNEL (element);
   GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
   gboolean got_eos;
   gboolean send_eos = FALSE;

   GST_DEBUG_OBJECT (funnel, "releasing pad");

   gst_pad_set_active (pad, FALSE);

   got_eos = fpad->got_eos;

   gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);

   GST_OBJECT_LOCK (funnel);
   if (!got_eos && gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
     GST_DEBUG_OBJECT (funnel, "Pad removed. All others are EOS. Sending EOS");
     send_eos = TRUE;
   }
   GST_OBJECT_UNLOCK (funnel);

   if (send_eos)
     if (!gst_pad_push_event (funnel->srcpad, gst_event_new_eos ()))
       GST_WARNING_OBJECT (funnel, "Failure pushing EOS");
 }

 static GstFlowReturn
 gst_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
 {
   GstFlowReturn res;
   GstFunnel *funnel = GST_FUNNEL (parent);
   GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
   GstEvent *event = NULL;
   GstClockTime newts;
 #if 0
   GstCaps *padcaps;
 #endif

   GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);

   GST_OBJECT_LOCK (funnel);

   if (fpad->got_eos) {
     GST_OBJECT_UNLOCK (funnel);
     GST_WARNING_OBJECT (funnel, "Got buffer on pad that received EOS");
     res = GST_FLOW_EOS;
     gst_buffer_unref (buffer);
     goto out;
   }

   if (fpad->segment.format == GST_FORMAT_UNDEFINED) {
     GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
         " setting segment [0,inf[");
     gst_segment_init (&fpad->segment, GST_FORMAT_TIME);
   }

   if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
     fpad->segment.position = GST_BUFFER_TIMESTAMP (buffer);

   newts = gst_segment_to_running_time (&fpad->segment,
       fpad->segment.format, GST_BUFFER_TIMESTAMP (buffer));
   if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
     buffer = gst_buffer_make_writable (buffer);
     GST_BUFFER_TIMESTAMP (buffer) = newts;
   }

   if (!funnel->has_segment) {
     GstSegment segment;

     gst_segment_init (&segment, GST_FORMAT_TIME);
     event = gst_event_new_segment (&segment);
     funnel->has_segment = TRUE;
   }
   GST_OBJECT_UNLOCK (funnel);

   if (event) {
     if (!gst_pad_push_event (funnel->srcpad, event))
       GST_WARNING_OBJECT (funnel, "Could not push out newsegment event");
   }
 #if 0
   GST_OBJECT_LOCK (pad);
   padcaps = GST_PAD_CAPS (funnel->srcpad);
   GST_OBJECT_UNLOCK (pad);

   if (GST_BUFFER_CAPS (buffer) && GST_BUFFER_CAPS (buffer) != padcaps) {
     if (!gst_pad_set_caps (funnel->srcpad, GST_BUFFER_CAPS (buffer))) {
       res = GST_FLOW_NOT_NEGOTIATED;
       gst_buffer_unref (buffer);
       goto out;
     }
   }
 #endif

   res = gst_pad_push (funnel->srcpad, buffer);

   GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));

 out:

   return res;
 }

 static gboolean
 gst_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
 {
   GstFunnel *funnel = GST_FUNNEL (parent);
   GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
   gboolean forward = TRUE;
   gboolean res = TRUE;

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_SEGMENT:
     {
       GST_OBJECT_LOCK (funnel);
       gst_event_copy_segment (event, &fpad->segment);
       GST_OBJECT_UNLOCK (funnel);

       forward = FALSE;
       break;
     }
     case GST_EVENT_FLUSH_STOP:
     {
       GST_OBJECT_LOCK (funnel);
       gst_segment_init (&fpad->segment, GST_FORMAT_UNDEFINED);
       funnel->has_segment = FALSE;
       fpad->got_eos = FALSE;
       GST_OBJECT_UNLOCK (funnel);
     }
       break;
     case GST_EVENT_EOS:
     {
       GST_OBJECT_LOCK (funnel);
       fpad->got_eos = TRUE;

       if (!gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
         GST_DEBUG_OBJECT (funnel,
             "Got EOS, but not from all sinkpads. Skipping");
         forward = FALSE;
       } else {
         GST_DEBUG_OBJECT (funnel, "Got EOS from all sinkpads. Forwarding");
       }
       GST_OBJECT_UNLOCK (funnel);
       break;
     }
     default:
       break;
   }

   if (forward)
     res = gst_pad_push_event (funnel->srcpad, event);
   else
     gst_event_unref (event);

   return res;
 }

 static gboolean
 gst_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
 {
   GstFunnel *funnel = GST_FUNNEL (parent);
   gboolean forward = TRUE;
   gboolean res = TRUE;

   if (forward)
     res = gst_pad_peer_query (funnel->srcpad, query);

   return res;
 }

 static gboolean
 gst_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
 {
   GstElement *funnel;
   GstIterator *iter;
   GstPad *sinkpad;
   gboolean result = FALSE;
   gboolean done = FALSE;
   GValue value = { 0, };

   funnel = GST_ELEMENT_CAST (parent);

   iter = gst_element_iterate_sink_pads (funnel);

   while (!done) {
     switch (gst_iterator_next (iter, &value)) {
       case GST_ITERATOR_OK:
         sinkpad = g_value_get_object (&value);
         gst_event_ref (event);
         result |= gst_pad_push_event (sinkpad, event);
         g_value_reset (&value);
         break;
       case GST_ITERATOR_RESYNC:
         gst_iterator_resync (iter);
         result = FALSE;
         break;
       case GST_ITERATOR_ERROR:
         GST_WARNING_OBJECT (funnel, "Error iterating sinkpads");
       case GST_ITERATOR_DONE:
         done = TRUE;
         break;
     }
   }
   g_value_unset (&value);
   gst_iterator_free (iter);
   gst_event_unref (event);

   return result;
 }

 static void
 reset_pad (const GValue * data, gpointer user_data)
 {
   GstPad *pad = g_value_get_object (data);
   GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);

   GST_OBJECT_LOCK (pad);
   gst_funnel_pad_reset (fpad);
   GST_OBJECT_UNLOCK (pad);
 }

 static GstStateChangeReturn
 gst_funnel_change_state (GstElement * element, GstStateChange transition)
 {
   GstFunnel *funnel = GST_FUNNEL (element);
   GstStateChangeReturn ret;

   switch (transition) {
     case GST_STATE_CHANGE_READY_TO_PAUSED:
     {
       GstIterator *iter = gst_element_iterate_sink_pads (element);
       GstIteratorResult res;

       do {
         res = gst_iterator_foreach (iter, reset_pad, NULL);
       } while (res == GST_ITERATOR_RESYNC);

       gst_iterator_free (iter);

       if (res == GST_ITERATOR_ERROR)
         return GST_STATE_CHANGE_FAILURE;

       GST_OBJECT_LOCK (funnel);
       funnel->has_segment = FALSE;
       GST_OBJECT_UNLOCK (funnel);
     }
       break;
     default:
       break;
   }

   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

   return ret;
 }
	/*
	* GStreamer Funnel element
	*
	* Copyright 2007 Collabora Ltd.
	* @author: Olivier Crete <olivier.crete@collabora.co.uk>
	* Copyright 2007 Nokia Corp.
	*
	* gstfunnel.c: Simple Funnel element
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 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
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	/**
	* SECTION:element-funnel
	*
	* Takes packets from various input sinks into one output source.
	*
	* funnel always outputs a single, open ended segment from
	* 0 with in %GST_FORMAT_TIME and outputs the buffers of the
	* different sinkpads with timestamps that are set to the
	* running time for that stream. funnel does not synchronize
	* the different input streams but simply forwards all buffers
	* immediately when they arrive.
	*
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include "gstfunnel.h"

	GST_DEBUG_CATEGORY_STATIC (gst_funnel_debug);
	#define GST_CAT_DEFAULT gst_funnel_debug

	GType gst_funnel_pad_get_type (void);
	#define GST_TYPE_FUNNEL_PAD \
	(gst_funnel_pad_get_type())
	#define GST_FUNNEL_PAD(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FUNNEL_PAD, GstFunnelPad))
	#define GST_FUNNEL_PAD_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FUNNEL_PAD, GstFunnelPadClass))
	#define GST_IS_FUNNEL_PAD(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FUNNEL_PAD))
	#define GST_IS_FUNNEL_PAD_CLASS(klass) \
	(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FUNNEL_PAD))
	#define GST_FUNNEL_PAD_CAST(obj) \
	((GstFunnelPad *)(obj))

	typedef struct _GstFunnelPad GstFunnelPad;
	typedef struct _GstFunnelPadClass GstFunnelPadClass;

	struct _GstFunnelPad
	{
	GstPad parent;

	GstSegment segment;
	gboolean got_eos;
	};

	struct _GstFunnelPadClass
	{
	GstPadClass parent;
	};

	G_DEFINE_TYPE (GstFunnelPad, gst_funnel_pad, GST_TYPE_PAD);

	static void
	gst_funnel_pad_class_init (GstFunnelPadClass * klass)
	{
	}

	static void
	gst_funnel_pad_reset (GstFunnelPad * pad)
	{
	gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
	pad->got_eos = FALSE;
	}

	static void
	gst_funnel_pad_init (GstFunnelPad * pad)
	{
	gst_funnel_pad_reset (pad);
	}

	static GstStaticPadTemplate funnel_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink_%u",
	GST_PAD_SINK,
	GST_PAD_REQUEST,
	GST_STATIC_CAPS_ANY);

	static GstStaticPadTemplate funnel_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);

	#define _do_init \
	GST_DEBUG_CATEGORY_INIT (gst_funnel_debug, "funnel", 0, "funnel element");
	#define gst_funnel_parent_class parent_class
	G_DEFINE_TYPE_WITH_CODE (GstFunnel, gst_funnel, GST_TYPE_ELEMENT, _do_init);

	static GstStateChangeReturn gst_funnel_change_state (GstElement * element,
	GstStateChange transition);
	static GstPad gst_funnel_request_new_pad (GstElement element,
	GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
	static void gst_funnel_release_pad (GstElement * element, GstPad * pad);

	static GstFlowReturn gst_funnel_sink_chain (GstPad * pad, GstObject * parent,
	GstBuffer * buffer);
	static gboolean gst_funnel_sink_event (GstPad * pad, GstObject * parent,
	GstEvent * event);
	static gboolean gst_funnel_sink_query (GstPad * pad, GstObject * parent,
	GstQuery * query);

	static gboolean gst_funnel_src_event (GstPad * pad, GstObject * parent,
	GstEvent * event);

	static void
	gst_funnel_dispose (GObject * object)
	{
	GList *item;

	restart:
	for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
	GstPad *pad = GST_PAD (item->data);

	if (GST_PAD_IS_SINK (pad)) {
	gst_element_release_request_pad (GST_ELEMENT (object), pad);
	goto restart;
	}
	}

	G_OBJECT_CLASS (parent_class)->dispose (object);
	}

	static void
	gst_funnel_class_init (GstFunnelClass * klass)
	{
	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
	GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

	gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_funnel_dispose);

	gst_element_class_set_static_metadata (gstelement_class,
	"Funnel pipe fitting", "Generic", "N-to-1 pipe fitting",
	"Olivier Crete <olivier.crete@collabora.co.uk>");

	gst_element_class_add_pad_template (gstelement_class,
	gst_static_pad_template_get (&funnel_sink_template));
	gst_element_class_add_pad_template (gstelement_class,
	gst_static_pad_template_get (&funnel_src_template));

	gstelement_class->request_new_pad =
	GST_DEBUG_FUNCPTR (gst_funnel_request_new_pad);
	gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_funnel_release_pad);
	gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_funnel_change_state);
	}

	static void
	gst_funnel_init (GstFunnel * funnel)
	{
	funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
	"src");
	gst_pad_set_event_function (funnel->srcpad, gst_funnel_src_event);
	gst_pad_use_fixed_caps (funnel->srcpad);
	gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
	}

	static GstPad *
	gst_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
	const gchar * name, const GstCaps * caps)
	{
	GstPad *sinkpad;

	GST_DEBUG_OBJECT (element, "requesting pad");

	sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_FUNNEL_PAD,
	"name", name, "direction", templ->direction, "template", templ,
	NULL));

	gst_pad_set_chain_function (sinkpad,
	GST_DEBUG_FUNCPTR (gst_funnel_sink_chain));
	gst_pad_set_event_function (sinkpad,
	GST_DEBUG_FUNCPTR (gst_funnel_sink_event));
	gst_pad_set_query_function (sinkpad,
	GST_DEBUG_FUNCPTR (gst_funnel_sink_query));

	gst_pad_set_active (sinkpad, TRUE);

	gst_element_add_pad (element, sinkpad);

	return sinkpad;
	}

	static gboolean
	gst_funnel_all_sinkpads_eos_unlocked (GstFunnel * funnel)
	{
	GstElement *element = GST_ELEMENT_CAST (funnel);
	GList *item;

	if (element->numsinkpads == 0)
	return FALSE;

	for (item = element->sinkpads; item != NULL; item = g_list_next (item)) {
	GstFunnelPad *sinkpad = item->data;

	if (!sinkpad->got_eos)
	return FALSE;
	}

	return TRUE;
	}

	static void
	gst_funnel_release_pad (GstElement * element, GstPad * pad)
	{
	GstFunnel *funnel = GST_FUNNEL (element);
	GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
	gboolean got_eos;
	gboolean send_eos = FALSE;

	GST_DEBUG_OBJECT (funnel, "releasing pad");

	gst_pad_set_active (pad, FALSE);

	got_eos = fpad->got_eos;

	gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);

	GST_OBJECT_LOCK (funnel);
	if (!got_eos && gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
	GST_DEBUG_OBJECT (funnel, "Pad removed. All others are EOS. Sending EOS");
	send_eos = TRUE;
	}
	GST_OBJECT_UNLOCK (funnel);

	if (send_eos)
	if (!gst_pad_push_event (funnel->srcpad, gst_event_new_eos ()))
	GST_WARNING_OBJECT (funnel, "Failure pushing EOS");
	}

	static GstFlowReturn
	gst_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
	{
	GstFlowReturn res;
	GstFunnel *funnel = GST_FUNNEL (parent);
	GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
	GstEvent *event = NULL;
	GstClockTime newts;
	#if 0
	GstCaps *padcaps;
	#endif

	GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);

	GST_OBJECT_LOCK (funnel);

	if (fpad->got_eos) {
	GST_OBJECT_UNLOCK (funnel);
	GST_WARNING_OBJECT (funnel, "Got buffer on pad that received EOS");
	res = GST_FLOW_EOS;
	gst_buffer_unref (buffer);
	goto out;
	}

	if (fpad->segment.format == GST_FORMAT_UNDEFINED) {
	GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
	" setting segment [0,inf[");
	gst_segment_init (&fpad->segment, GST_FORMAT_TIME);
	}

	if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
	fpad->segment.position = GST_BUFFER_TIMESTAMP (buffer);

	newts = gst_segment_to_running_time (&fpad->segment,
	fpad->segment.format, GST_BUFFER_TIMESTAMP (buffer));
	if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
	buffer = gst_buffer_make_writable (buffer);
	GST_BUFFER_TIMESTAMP (buffer) = newts;
	}

	if (!funnel->has_segment) {
	GstSegment segment;

	gst_segment_init (&segment, GST_FORMAT_TIME);
	event = gst_event_new_segment (&segment);
	funnel->has_segment = TRUE;
	}
	GST_OBJECT_UNLOCK (funnel);

	if (event) {
	if (!gst_pad_push_event (funnel->srcpad, event))
	GST_WARNING_OBJECT (funnel, "Could not push out newsegment event");
	}
	#if 0
	GST_OBJECT_LOCK (pad);
	padcaps = GST_PAD_CAPS (funnel->srcpad);
	GST_OBJECT_UNLOCK (pad);

	if (GST_BUFFER_CAPS (buffer) && GST_BUFFER_CAPS (buffer) != padcaps) {
	if (!gst_pad_set_caps (funnel->srcpad, GST_BUFFER_CAPS (buffer))) {
	res = GST_FLOW_NOT_NEGOTIATED;
	gst_buffer_unref (buffer);
	goto out;
	}
	}
	#endif

	res = gst_pad_push (funnel->srcpad, buffer);

	GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));

	out:

	return res;
	}

	static gboolean
	gst_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
	{
	GstFunnel *funnel = GST_FUNNEL (parent);
	GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
	gboolean forward = TRUE;
	gboolean res = TRUE;

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_SEGMENT:
	{
	GST_OBJECT_LOCK (funnel);
	gst_event_copy_segment (event, &fpad->segment);
	GST_OBJECT_UNLOCK (funnel);

	forward = FALSE;
	break;
	}
	case GST_EVENT_FLUSH_STOP:
	{
	GST_OBJECT_LOCK (funnel);
	gst_segment_init (&fpad->segment, GST_FORMAT_UNDEFINED);
	funnel->has_segment = FALSE;
	fpad->got_eos = FALSE;
	GST_OBJECT_UNLOCK (funnel);
	}
	break;
	case GST_EVENT_EOS:
	{
	GST_OBJECT_LOCK (funnel);
	fpad->got_eos = TRUE;

	if (!gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
	GST_DEBUG_OBJECT (funnel,
	"Got EOS, but not from all sinkpads. Skipping");
	forward = FALSE;
	} else {
	GST_DEBUG_OBJECT (funnel, "Got EOS from all sinkpads. Forwarding");
	}
	GST_OBJECT_UNLOCK (funnel);
	break;
	}
	default:
	break;
	}

	if (forward)
	res = gst_pad_push_event (funnel->srcpad, event);
	else
	gst_event_unref (event);

	return res;
	}

	static gboolean
	gst_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
	{
	GstFunnel *funnel = GST_FUNNEL (parent);
	gboolean forward = TRUE;
	gboolean res = TRUE;

	if (forward)
	res = gst_pad_peer_query (funnel->srcpad, query);

	return res;
	}

	static gboolean
	gst_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
	{
	GstElement *funnel;
	GstIterator *iter;
	GstPad *sinkpad;
	gboolean result = FALSE;
	gboolean done = FALSE;
	GValue value = { 0, };

	funnel = GST_ELEMENT_CAST (parent);

	iter = gst_element_iterate_sink_pads (funnel);

	while (!done) {
	switch (gst_iterator_next (iter, &value)) {
	case GST_ITERATOR_OK:
	sinkpad = g_value_get_object (&value);
	gst_event_ref (event);
	result \|= gst_pad_push_event (sinkpad, event);
	g_value_reset (&value);
	break;
	case GST_ITERATOR_RESYNC:
	gst_iterator_resync (iter);
	result = FALSE;
	break;
	case GST_ITERATOR_ERROR:
	GST_WARNING_OBJECT (funnel, "Error iterating sinkpads");
	case GST_ITERATOR_DONE:
	done = TRUE;
	break;
	}
	}
	g_value_unset (&value);
	gst_iterator_free (iter);
	gst_event_unref (event);

	return result;
	}

	static void
	reset_pad (const GValue * data, gpointer user_data)
	{
	GstPad *pad = g_value_get_object (data);
	GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);

	GST_OBJECT_LOCK (pad);
	gst_funnel_pad_reset (fpad);
	GST_OBJECT_UNLOCK (pad);
	}

	static GstStateChangeReturn
	gst_funnel_change_state (GstElement * element, GstStateChange transition)
	{
	GstFunnel *funnel = GST_FUNNEL (element);
	GstStateChangeReturn ret;

	switch (transition) {
	case GST_STATE_CHANGE_READY_TO_PAUSED:
	{
	GstIterator *iter = gst_element_iterate_sink_pads (element);
	GstIteratorResult res;

	do {
	res = gst_iterator_foreach (iter, reset_pad, NULL);
	} while (res == GST_ITERATOR_RESYNC);

	gst_iterator_free (iter);

	if (res == GST_ITERATOR_ERROR)
	return GST_STATE_CHANGE_FAILURE;

	GST_OBJECT_LOCK (funnel);
	funnel->has_segment = FALSE;
	GST_OBJECT_UNLOCK (funnel);
	}
	break;
	default:
	break;
	}

	ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

	return ret;
	}