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Don't special case segment/caps, just push all sticky events when they are received on the currently active pad or when the active pad changes.
263 lines
7.2 KiB
C
263 lines
7.2 KiB
C
/*
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* GStreamer Funnel element
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*
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* Copyright 2007 Collabora Ltd.
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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* Copyright 2007 Nokia Corp.
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*
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* gstfunnel.c: Simple Funnel element
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* SECTION:element-funnel
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*
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* Takes packets from various input sinks into one output source.
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*
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* funnel always outputs a single, open ended segment from
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* 0 with in %GST_FORMAT_TIME and outputs the buffers of the
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* different sinkpads with timestamps that are set to the
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* running time for that stream. funnel does not synchronize
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* the different input streams but simply forwards all buffers
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* immediately when they arrive.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstfunnel.h"
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GST_DEBUG_CATEGORY_STATIC (gst_funnel_debug);
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#define GST_CAT_DEFAULT gst_funnel_debug
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static GstStaticPadTemplate funnel_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate funnel_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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#define _do_init \
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GST_DEBUG_CATEGORY_INIT (gst_funnel_debug, "funnel", 0, "funnel element");
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#define gst_funnel_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstFunnel, gst_funnel, GST_TYPE_ELEMENT, _do_init);
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static GstPad *gst_funnel_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
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static void gst_funnel_release_pad (GstElement * element, GstPad * pad);
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static GstFlowReturn gst_funnel_sink_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static gboolean gst_funnel_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static void
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gst_funnel_dispose (GObject * object)
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{
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GstFunnel *funnel = GST_FUNNEL (object);
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GList *item;
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gst_object_replace ((GstObject **) & funnel->last_sinkpad, NULL);
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restart:
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for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
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GstPad *pad = GST_PAD (item->data);
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if (GST_PAD_IS_SINK (pad)) {
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gst_element_release_request_pad (GST_ELEMENT (object), pad);
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goto restart;
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}
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_funnel_class_init (GstFunnelClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_funnel_dispose);
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gst_element_class_set_static_metadata (gstelement_class,
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"Funnel pipe fitting", "Generic", "N-to-1 pipe fitting",
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"Olivier Crete <olivier.crete@collabora.co.uk>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&funnel_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&funnel_src_template));
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_funnel_request_new_pad);
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gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_funnel_release_pad);
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}
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static void
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gst_funnel_init (GstFunnel * funnel)
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{
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funnel->srcpad = gst_pad_new_from_static_template (&funnel_src_template,
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"src");
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gst_pad_use_fixed_caps (funnel->srcpad);
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gst_element_add_pad (GST_ELEMENT (funnel), funnel->srcpad);
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}
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static GstPad *
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gst_funnel_request_new_pad (GstElement * element, GstPadTemplate * templ,
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const gchar * name, const GstCaps * caps)
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{
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GstPad *sinkpad;
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GST_DEBUG_OBJECT (element, "requesting pad");
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sinkpad = gst_pad_new_from_static_template (&funnel_sink_template, name);
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gst_pad_set_chain_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_funnel_sink_chain));
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gst_pad_set_event_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_funnel_sink_event));
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gst_pad_set_active (sinkpad, TRUE);
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gst_element_add_pad (element, sinkpad);
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return sinkpad;
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}
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static gboolean
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gst_funnel_all_sinkpads_eos_unlocked (GstFunnel * funnel)
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{
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GstElement *element = GST_ELEMENT_CAST (funnel);
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GList *item;
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if (element->numsinkpads == 0)
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return FALSE;
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for (item = element->sinkpads; item != NULL; item = g_list_next (item)) {
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GstPad *sinkpad = item->data;
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GstEvent *eos;
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eos = gst_pad_get_sticky_event (sinkpad, GST_EVENT_EOS, 0);
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if (eos)
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gst_event_unref (eos);
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if (eos == NULL)
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return FALSE;
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}
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return TRUE;
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}
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static void
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gst_funnel_release_pad (GstElement * element, GstPad * pad)
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{
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GstFunnel *funnel = GST_FUNNEL (element);
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GstEvent *eos;
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gboolean send_eos = FALSE;
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GST_DEBUG_OBJECT (funnel, "releasing pad");
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gst_pad_set_active (pad, FALSE);
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eos = gst_pad_get_sticky_event (pad, GST_EVENT_EOS, 0);
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if (eos)
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gst_event_unref (eos);
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gst_element_remove_pad (GST_ELEMENT_CAST (funnel), pad);
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GST_OBJECT_LOCK (funnel);
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if (eos == NULL && gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
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GST_DEBUG_OBJECT (funnel, "Pad removed. All others are EOS. Sending EOS");
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send_eos = TRUE;
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}
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GST_OBJECT_UNLOCK (funnel);
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if (send_eos)
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if (!gst_pad_push_event (funnel->srcpad, gst_event_new_eos ()))
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GST_WARNING_OBJECT (funnel, "Failure pushing EOS");
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}
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static gboolean
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forward_events (GstPad * pad, GstEvent ** event, gpointer user_data)
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{
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GstPad *srcpad = user_data;
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if (GST_EVENT_TYPE (*event) != GST_EVENT_EOS)
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gst_pad_push_event (srcpad, gst_event_ref (*event));
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return TRUE;
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}
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static GstFlowReturn
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gst_funnel_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstFlowReturn res;
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GstFunnel *funnel = GST_FUNNEL (parent);
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GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);
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GST_PAD_STREAM_LOCK (funnel->srcpad);
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if (funnel->last_sinkpad != pad) {
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gst_object_replace ((GstObject **) & funnel->last_sinkpad,
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GST_OBJECT (pad));
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gst_pad_sticky_events_foreach (pad, forward_events, funnel->srcpad);
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}
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res = gst_pad_push (funnel->srcpad, buffer);
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GST_PAD_STREAM_UNLOCK (funnel->srcpad);
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GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));
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return res;
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}
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static gboolean
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gst_funnel_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstFunnel *funnel = GST_FUNNEL (parent);
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gboolean forward = TRUE;
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gboolean res = TRUE;
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gboolean unlock = FALSE;
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if (GST_EVENT_IS_STICKY (event)) {
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unlock = TRUE;
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GST_PAD_STREAM_LOCK (funnel->srcpad);
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if (pad != funnel->last_sinkpad)
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forward = FALSE;
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}
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if (forward)
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res = gst_pad_push_event (funnel->srcpad, event);
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else
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gst_event_unref (event);
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if (unlock)
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GST_PAD_STREAM_UNLOCK (funnel->srcpad);
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return res;
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}
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