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Save the value of the pad's got_eos in gst_funnel_release_pad, before calling gst_element_remove_pad. This is because gst_element_remove_pad may free the pad. https://bugzilla.gnome.org/show_bug.cgi?id=678017
482 lines
13 KiB
C
482 lines
13 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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GType gst_funnel_pad_get_type (void);
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#define GST_TYPE_FUNNEL_PAD \
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(gst_funnel_pad_get_type())
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#define GST_FUNNEL_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FUNNEL_PAD, GstFunnelPad))
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#define GST_FUNNEL_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FUNNEL_PAD, GstFunnelPadClass))
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#define GST_IS_FUNNEL_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FUNNEL_PAD))
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#define GST_IS_FUNNEL_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FUNNEL_PAD))
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#define GST_FUNNEL_PAD_CAST(obj) \
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((GstFunnelPad *)(obj))
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typedef struct _GstFunnelPad GstFunnelPad;
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typedef struct _GstFunnelPadClass GstFunnelPadClass;
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struct _GstFunnelPad
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{
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GstPad parent;
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GstSegment segment;
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gboolean got_eos;
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};
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struct _GstFunnelPadClass
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{
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GstPadClass parent;
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};
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G_DEFINE_TYPE (GstFunnelPad, gst_funnel_pad, GST_TYPE_PAD);
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static void
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gst_funnel_pad_class_init (GstFunnelPadClass * klass)
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{
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}
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static void
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gst_funnel_pad_reset (GstFunnelPad * pad)
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{
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gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
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pad->got_eos = FALSE;
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}
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static void
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gst_funnel_pad_init (GstFunnelPad * pad)
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{
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gst_funnel_pad_reset (pad);
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}
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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 GstStateChangeReturn gst_funnel_change_state (GstElement * element,
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GstStateChange transition);
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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 gboolean gst_funnel_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static gboolean gst_funnel_src_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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GList *item;
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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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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_funnel_change_state);
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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_set_event_function (funnel->srcpad, gst_funnel_src_event);
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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_CAST (g_object_new (GST_TYPE_FUNNEL_PAD,
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"name", name, "direction", templ->direction, "template", templ,
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NULL));
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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_query_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_funnel_sink_query));
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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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GstFunnelPad *sinkpad = item->data;
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if (!sinkpad->got_eos)
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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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GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
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gboolean got_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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got_eos = fpad->got_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 (!got_eos && 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 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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GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
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GstEvent *event = NULL;
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GstClockTime newts;
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#if 0
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GstCaps *padcaps;
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#endif
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GST_DEBUG_OBJECT (funnel, "received buffer %p", buffer);
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GST_OBJECT_LOCK (funnel);
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if (fpad->got_eos) {
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GST_OBJECT_UNLOCK (funnel);
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GST_WARNING_OBJECT (funnel, "Got buffer on pad that received EOS");
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res = GST_FLOW_EOS;
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gst_buffer_unref (buffer);
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goto out;
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}
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if (fpad->segment.format == GST_FORMAT_UNDEFINED) {
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GST_WARNING_OBJECT (funnel, "Got buffer without segment,"
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" setting segment [0,inf[");
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gst_segment_init (&fpad->segment, GST_FORMAT_TIME);
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}
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if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
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fpad->segment.position = GST_BUFFER_TIMESTAMP (buffer);
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newts = gst_segment_to_running_time (&fpad->segment,
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fpad->segment.format, GST_BUFFER_TIMESTAMP (buffer));
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if (newts != GST_BUFFER_TIMESTAMP (buffer)) {
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buffer = gst_buffer_make_writable (buffer);
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GST_BUFFER_TIMESTAMP (buffer) = newts;
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}
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if (!funnel->has_segment) {
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GstSegment segment;
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gst_segment_init (&segment, GST_FORMAT_TIME);
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event = gst_event_new_segment (&segment);
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funnel->has_segment = TRUE;
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}
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GST_OBJECT_UNLOCK (funnel);
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if (event) {
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if (!gst_pad_push_event (funnel->srcpad, event))
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GST_WARNING_OBJECT (funnel, "Could not push out newsegment event");
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}
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#if 0
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GST_OBJECT_LOCK (pad);
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padcaps = GST_PAD_CAPS (funnel->srcpad);
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GST_OBJECT_UNLOCK (pad);
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if (GST_BUFFER_CAPS (buffer) && GST_BUFFER_CAPS (buffer) != padcaps) {
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if (!gst_pad_set_caps (funnel->srcpad, GST_BUFFER_CAPS (buffer))) {
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res = GST_FLOW_NOT_NEGOTIATED;
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gst_buffer_unref (buffer);
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goto out;
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}
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}
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#endif
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res = gst_pad_push (funnel->srcpad, buffer);
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GST_LOG_OBJECT (funnel, "handled buffer %s", gst_flow_get_name (res));
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out:
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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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GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
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gboolean forward = TRUE;
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gboolean res = TRUE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEGMENT:
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{
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GST_OBJECT_LOCK (funnel);
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gst_event_copy_segment (event, &fpad->segment);
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GST_OBJECT_UNLOCK (funnel);
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forward = FALSE;
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break;
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}
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case GST_EVENT_FLUSH_STOP:
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{
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GST_OBJECT_LOCK (funnel);
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gst_segment_init (&fpad->segment, GST_FORMAT_UNDEFINED);
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funnel->has_segment = FALSE;
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fpad->got_eos = FALSE;
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GST_OBJECT_UNLOCK (funnel);
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}
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break;
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case GST_EVENT_EOS:
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{
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GST_OBJECT_LOCK (funnel);
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fpad->got_eos = TRUE;
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if (!gst_funnel_all_sinkpads_eos_unlocked (funnel)) {
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GST_DEBUG_OBJECT (funnel,
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"Got EOS, but not from all sinkpads. Skipping");
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forward = FALSE;
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} else {
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GST_DEBUG_OBJECT (funnel, "Got EOS from all sinkpads. Forwarding");
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}
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GST_OBJECT_UNLOCK (funnel);
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break;
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}
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default:
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break;
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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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return res;
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}
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static gboolean
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gst_funnel_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
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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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if (forward)
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res = gst_pad_peer_query (funnel->srcpad, query);
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return res;
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}
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static gboolean
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gst_funnel_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstElement *funnel;
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GstIterator *iter;
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GstPad *sinkpad;
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gboolean result = FALSE;
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gboolean done = FALSE;
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GValue value = { 0, };
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funnel = GST_ELEMENT_CAST (parent);
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iter = gst_element_iterate_sink_pads (funnel);
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while (!done) {
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switch (gst_iterator_next (iter, &value)) {
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case GST_ITERATOR_OK:
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sinkpad = g_value_get_object (&value);
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gst_event_ref (event);
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result |= gst_pad_push_event (sinkpad, event);
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g_value_reset (&value);
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break;
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case GST_ITERATOR_RESYNC:
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gst_iterator_resync (iter);
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result = FALSE;
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break;
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case GST_ITERATOR_ERROR:
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GST_WARNING_OBJECT (funnel, "Error iterating sinkpads");
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case GST_ITERATOR_DONE:
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done = TRUE;
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break;
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}
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}
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g_value_unset (&value);
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gst_iterator_free (iter);
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gst_event_unref (event);
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return result;
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}
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static void
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reset_pad (const GValue * data, gpointer user_data)
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{
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GstPad *pad = g_value_get_object (data);
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GstFunnelPad *fpad = GST_FUNNEL_PAD_CAST (pad);
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GST_OBJECT_LOCK (pad);
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gst_funnel_pad_reset (fpad);
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GST_OBJECT_UNLOCK (pad);
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}
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static GstStateChangeReturn
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gst_funnel_change_state (GstElement * element, GstStateChange transition)
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{
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GstFunnel *funnel = GST_FUNNEL (element);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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{
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GstIterator *iter = gst_element_iterate_sink_pads (element);
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GstIteratorResult res;
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do {
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res = gst_iterator_foreach (iter, reset_pad, NULL);
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} while (res == GST_ITERATOR_RESYNC);
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gst_iterator_free (iter);
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if (res == GST_ITERATOR_ERROR)
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return GST_STATE_CHANGE_FAILURE;
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GST_OBJECT_LOCK (funnel);
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funnel->has_segment = FALSE;
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GST_OBJECT_UNLOCK (funnel);
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}
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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return ret;
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}
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