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53f975f63c
No short-desc as we have them in the element details. Also keep things (Makefile.am and sections.txt) sorted. Reword ambigous returns. No text after since please.
1423 lines
42 KiB
C
1423 lines
42 KiB
C
/* GStreamer
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* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
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* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
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* Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
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* Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
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* Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-input-selector
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* @see_also: #GstOutputSelector
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*
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* Direct one out of N input streams to the output pad.
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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 <string.h>
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#include "gstinputselector.h"
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#include "gstselector-marshal.h"
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GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
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#define GST_CAT_DEFAULT input_selector_debug
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static const GstElementDetails gst_input_selector_details =
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GST_ELEMENT_DETAILS ("Input selector",
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"Generic",
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"N-to-1 input stream selectoring",
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"Julien Moutte <julien@moutte.net>\n"
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"Ronald S. Bultje <rbultje@ronald.bitfreak.net>\n"
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"Jan Schmidt <thaytan@mad.scientist.com>\n"
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"Wim Taymans <wim.taymans@gmail.com>");
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static GstStaticPadTemplate gst_input_selector_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink%d",
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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 gst_input_selector_src_factory =
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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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enum
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{
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PROP_0,
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PROP_N_PADS,
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PROP_ACTIVE_PAD,
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PROP_SELECT_ALL,
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PROP_LAST
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};
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#define DEFAULT_PAD_ALWAYS_OK TRUE
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enum
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{
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PROP_PAD_0,
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PROP_PAD_RUNNING_TIME,
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PROP_PAD_TAGS,
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PROP_PAD_ACTIVE,
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PROP_PAD_ALWAYS_OK,
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PROP_PAD_LAST
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};
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enum
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{
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/* methods */
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SIGNAL_BLOCK,
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SIGNAL_SWITCH,
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LAST_SIGNAL
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};
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static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
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static gboolean gst_input_selector_is_active_sinkpad (GstInputSelector * sel,
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GstPad * pad);
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static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
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GstPad * pad);
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static GstPad *gst_input_selector_get_linked_pad (GstPad * pad,
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gboolean strict);
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static gboolean gst_input_selector_check_eos (GstElement * selector);
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#define GST_TYPE_SELECTOR_PAD \
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(gst_selector_pad_get_type())
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#define GST_SELECTOR_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
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#define GST_SELECTOR_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
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#define GST_IS_SELECTOR_PAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
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#define GST_IS_SELECTOR_PAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
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#define GST_SELECTOR_PAD_CAST(obj) \
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((GstSelectorPad *)(obj))
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typedef struct _GstSelectorPad GstSelectorPad;
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typedef struct _GstSelectorPadClass GstSelectorPadClass;
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struct _GstSelectorPad
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{
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GstPad parent;
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gboolean active; /* when buffer have passed the pad */
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gboolean eos; /* when EOS has been received */
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gboolean discont; /* after switching we create a discont */
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gboolean always_ok;
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GstSegment segment; /* the current segment on the pad */
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GstTagList *tags; /* last tags received on the pad */
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gboolean segment_pending;
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};
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struct _GstSelectorPadClass
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{
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GstPadClass parent;
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};
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static void gst_selector_pad_class_init (GstSelectorPadClass * klass);
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static void gst_selector_pad_init (GstSelectorPad * pad);
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static void gst_selector_pad_finalize (GObject * object);
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static void gst_selector_pad_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_selector_pad_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static GstPadClass *selector_pad_parent_class = NULL;
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static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
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static void gst_selector_pad_reset (GstSelectorPad * pad);
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static gboolean gst_selector_pad_event (GstPad * pad, GstEvent * event);
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static GstCaps *gst_selector_pad_getcaps (GstPad * pad);
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static GList *gst_selector_pad_get_linked_pads (GstPad * pad);
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static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstBuffer * buf);
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static GstFlowReturn gst_selector_pad_bufferalloc (GstPad * pad,
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guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
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static GType
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gst_selector_pad_get_type (void)
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{
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static GType selector_pad_type = 0;
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if (!selector_pad_type) {
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static const GTypeInfo selector_pad_info = {
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sizeof (GstSelectorPadClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_selector_pad_class_init,
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NULL,
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NULL,
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sizeof (GstSelectorPad),
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0,
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(GInstanceInitFunc) gst_selector_pad_init,
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};
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selector_pad_type =
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g_type_register_static (GST_TYPE_PAD, "GstSelectorPad",
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&selector_pad_info, 0);
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}
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return selector_pad_type;
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}
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static void
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gst_selector_pad_class_init (GstSelectorPadClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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selector_pad_parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = gst_selector_pad_finalize;
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_selector_pad_get_property);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_selector_pad_set_property);
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g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
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g_param_spec_int64 ("running-time", "Running time",
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"Running time of stream on pad", 0, G_MAXINT64, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
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g_param_spec_boxed ("tags", "Tags",
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"The currently active tags on the pad", GST_TYPE_TAG_LIST,
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G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
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g_param_spec_boolean ("active", "Active",
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"If the pad is currently active", FALSE, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
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g_param_spec_boolean ("always-ok", "Always OK",
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"Make an inactive pad return OK instead of NOT_LINKED",
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DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE));
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}
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static void
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gst_selector_pad_init (GstSelectorPad * pad)
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{
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pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
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gst_selector_pad_reset (pad);
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}
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static void
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gst_selector_pad_finalize (GObject * object)
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{
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GstSelectorPad *pad;
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pad = GST_SELECTOR_PAD_CAST (object);
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if (pad->tags)
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gst_tag_list_free (pad->tags);
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G_OBJECT_CLASS (selector_pad_parent_class)->finalize (object);
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}
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static void
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gst_selector_pad_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
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switch (prop_id) {
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case PROP_PAD_ALWAYS_OK:
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GST_OBJECT_LOCK (object);
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spad->always_ok = g_value_get_boolean (value);
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GST_OBJECT_UNLOCK (object);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_selector_pad_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
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switch (prop_id) {
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case PROP_PAD_RUNNING_TIME:
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g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
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break;
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case PROP_PAD_TAGS:
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GST_OBJECT_LOCK (object);
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g_value_set_boxed (value, spad->tags);
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GST_OBJECT_UNLOCK (object);
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break;
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case PROP_PAD_ACTIVE:
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{
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GstInputSelector *sel;
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sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
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g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
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GST_PAD_CAST (spad)));
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gst_object_unref (sel);
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break;
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}
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case PROP_PAD_ALWAYS_OK:
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GST_OBJECT_LOCK (object);
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g_value_set_boolean (value, spad->always_ok);
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GST_OBJECT_UNLOCK (object);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gint64
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gst_selector_pad_get_running_time (GstSelectorPad * pad)
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{
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gint64 ret = 0;
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GST_OBJECT_LOCK (pad);
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if (pad->active) {
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gint64 last_stop = pad->segment.last_stop;
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if (last_stop >= 0)
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ret = gst_segment_to_running_time (&pad->segment, GST_FORMAT_TIME,
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last_stop);
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}
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GST_OBJECT_UNLOCK (pad);
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GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (ret));
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return ret;
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}
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static void
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gst_selector_pad_reset (GstSelectorPad * pad)
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{
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GST_OBJECT_LOCK (pad);
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pad->active = FALSE;
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pad->eos = FALSE;
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pad->segment_pending = FALSE;
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pad->discont = FALSE;
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gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
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GST_OBJECT_UNLOCK (pad);
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}
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/* strictly get the linked pad from the sinkpad. If the pad is active we return
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* the srcpad else we return NULL */
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static GList *
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gst_selector_pad_get_linked_pads (GstPad * pad)
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{
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GstPad *otherpad;
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otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
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if (!otherpad)
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return NULL;
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/* need to drop the ref, internal linked pads is not MT safe */
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gst_object_unref (otherpad);
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return g_list_append (NULL, otherpad);
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}
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static gboolean
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gst_selector_pad_event (GstPad * pad, GstEvent * event)
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{
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gboolean res = TRUE;
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gboolean forward = TRUE;
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GstInputSelector *sel;
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GstSelectorPad *selpad;
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GstPad *prev_active_sinkpad;
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GstPad *active_sinkpad;
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sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
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selpad = GST_SELECTOR_PAD_CAST (pad);
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GST_INPUT_SELECTOR_LOCK (sel);
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prev_active_sinkpad = sel->active_sinkpad;
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active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
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/* only forward if we are dealing with the active sinkpad or if select_all
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* is enabled */
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if (pad != active_sinkpad && !sel->select_all)
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forward = FALSE;
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GST_INPUT_SELECTOR_UNLOCK (sel);
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if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
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g_object_notify (G_OBJECT (sel), "active-pad");
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_START:
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/* FIXME, flush out the waiter */
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break;
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case GST_EVENT_FLUSH_STOP:
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GST_INPUT_SELECTOR_LOCK (sel);
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gst_selector_pad_reset (selpad);
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sel->pending_close = FALSE;
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GST_INPUT_SELECTOR_UNLOCK (sel);
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break;
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case GST_EVENT_NEWSEGMENT:
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{
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gboolean update;
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GstFormat format;
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gdouble rate, arate;
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gint64 start, stop, time;
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gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
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&start, &stop, &time);
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GST_DEBUG_OBJECT (pad,
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"configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
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"format %d, "
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"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
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G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
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GST_INPUT_SELECTOR_LOCK (sel);
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GST_OBJECT_LOCK (selpad);
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gst_segment_set_newsegment_full (&selpad->segment, update,
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rate, arate, format, start, stop, time);
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GST_OBJECT_UNLOCK (selpad);
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/* we are not going to forward the segment, mark the segment as
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* pending */
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forward = FALSE;
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selpad->segment_pending = TRUE;
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GST_INPUT_SELECTOR_UNLOCK (sel);
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break;
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}
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case GST_EVENT_TAG:
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{
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GstTagList *tags;
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GST_OBJECT_LOCK (selpad);
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if (selpad->tags)
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gst_tag_list_free (selpad->tags);
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gst_event_parse_tag (event, &tags);
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if (tags)
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tags = gst_tag_list_copy (tags);
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selpad->tags = tags;
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GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, selpad->tags);
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GST_OBJECT_UNLOCK (selpad);
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break;
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}
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case GST_EVENT_EOS:
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selpad->eos = TRUE;
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GST_DEBUG_OBJECT (pad, "received EOS");
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/* don't forward eos in select_all mode until all sink pads have eos */
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if (sel->select_all && !gst_input_selector_check_eos (GST_ELEMENT (sel))) {
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forward = FALSE;
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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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if (forward) {
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GST_DEBUG_OBJECT (pad, "forwarding event");
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res = gst_pad_push_event (sel->srcpad, event);
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} else
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gst_event_unref (event);
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gst_object_unref (sel);
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return res;
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}
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static GstCaps *
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gst_selector_pad_getcaps (GstPad * pad)
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{
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GstInputSelector *sel;
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GstCaps *caps;
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sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
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GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
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caps = gst_pad_peer_get_caps (sel->srcpad);
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if (caps == NULL)
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caps = gst_caps_new_any ();
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gst_object_unref (sel);
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return caps;
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}
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static GstFlowReturn
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gst_selector_pad_bufferalloc (GstPad * pad, guint64 offset,
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guint size, GstCaps * caps, GstBuffer ** buf)
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{
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GstInputSelector *sel;
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GstFlowReturn result;
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GstPad *active_sinkpad;
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GstPad *prev_active_sinkpad;
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GstSelectorPad *selpad;
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sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
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selpad = GST_SELECTOR_PAD_CAST (pad);
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GST_DEBUG_OBJECT (pad, "received alloc");
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GST_INPUT_SELECTOR_LOCK (sel);
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prev_active_sinkpad = sel->active_sinkpad;
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active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
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if (pad != active_sinkpad)
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goto not_active;
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GST_INPUT_SELECTOR_UNLOCK (sel);
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if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
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g_object_notify (G_OBJECT (sel), "active-pad");
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result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
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done:
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gst_object_unref (sel);
|
|
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
not_active:
|
|
{
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
/* unselected pad, perform fallback alloc or return unlinked when
|
|
* asked */
|
|
GST_OBJECT_LOCK (selpad);
|
|
if (selpad->always_ok) {
|
|
GST_DEBUG_OBJECT (pad, "Not selected, performing fallback allocation");
|
|
*buf = NULL;
|
|
result = GST_FLOW_OK;
|
|
} else {
|
|
GST_DEBUG_OBJECT (pad, "Not selected, return NOT_LINKED");
|
|
result = GST_FLOW_NOT_LINKED;
|
|
}
|
|
GST_OBJECT_UNLOCK (selpad);
|
|
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* must be called with the SELECTOR_LOCK, will block while the pad is blocked
|
|
* or return TRUE when flushing */
|
|
static gboolean
|
|
gst_input_selector_wait (GstInputSelector * self, GstPad * pad)
|
|
{
|
|
while (self->blocked && !self->flushing) {
|
|
/* we can be unlocked here when we are shutting down (flushing) or when we
|
|
* get unblocked */
|
|
GST_INPUT_SELECTOR_WAIT (self);
|
|
}
|
|
return self->flushing;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstInputSelector *sel;
|
|
GstFlowReturn res;
|
|
GstPad *active_sinkpad;
|
|
GstPad *prev_active_sinkpad;
|
|
GstSelectorPad *selpad;
|
|
GstClockTime end_time, duration;
|
|
GstSegment *seg;
|
|
GstEvent *close_event = NULL, *start_event = NULL;
|
|
|
|
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
|
|
selpad = GST_SELECTOR_PAD_CAST (pad);
|
|
seg = &selpad->segment;
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
/* wait or check for flushing */
|
|
if (gst_input_selector_wait (sel, pad))
|
|
goto flushing;
|
|
|
|
GST_DEBUG_OBJECT (pad, "getting active pad");
|
|
|
|
prev_active_sinkpad = sel->active_sinkpad;
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
|
|
/* update the segment on the srcpad */
|
|
end_time = GST_BUFFER_TIMESTAMP (buf);
|
|
if (GST_CLOCK_TIME_IS_VALID (end_time)) {
|
|
duration = GST_BUFFER_DURATION (buf);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
end_time += duration;
|
|
GST_DEBUG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (end_time));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
gst_segment_set_last_stop (seg, seg->format, end_time);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
/* Ignore buffers from pads except the selected one */
|
|
if (pad != active_sinkpad)
|
|
goto ignore;
|
|
|
|
if (G_UNLIKELY (sel->pending_close)) {
|
|
GstSegment *cseg = &sel->segment;
|
|
|
|
GST_DEBUG_OBJECT (sel,
|
|
"pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
|
|
"format %d, "
|
|
"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
|
|
G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
|
|
cseg->start, cseg->stop, cseg->time);
|
|
|
|
/* create update segment */
|
|
close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
|
|
cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
|
|
|
|
sel->pending_close = FALSE;
|
|
}
|
|
/* if we have a pending segment, push it out now */
|
|
if (G_UNLIKELY (selpad->segment_pending)) {
|
|
GST_DEBUG_OBJECT (pad,
|
|
"pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
|
|
"format %d, "
|
|
"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
|
|
G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
|
|
seg->start, seg->stop, seg->time);
|
|
|
|
start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
|
|
seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
|
|
|
|
selpad->segment_pending = FALSE;
|
|
}
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
|
|
g_object_notify (G_OBJECT (sel), "active-pad");
|
|
|
|
if (close_event)
|
|
gst_pad_push_event (sel->srcpad, close_event);
|
|
|
|
if (start_event)
|
|
gst_pad_push_event (sel->srcpad, start_event);
|
|
|
|
if (selpad->discont) {
|
|
buf = gst_buffer_make_metadata_writable (buf);
|
|
|
|
GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
|
|
selpad->discont = FALSE;
|
|
}
|
|
|
|
/* forward */
|
|
GST_DEBUG_OBJECT (pad, "Forwarding buffer %p from pad %s:%s", buf,
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
res = gst_pad_push (sel->srcpad, buf);
|
|
|
|
done:
|
|
gst_object_unref (sel);
|
|
return res;
|
|
|
|
/* dropped buffers */
|
|
ignore:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
|
|
/* when we drop a buffer, we're creating a discont on this pad */
|
|
selpad->discont = TRUE;
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
gst_buffer_unref (buf);
|
|
|
|
/* figure out what to return upstream */
|
|
GST_OBJECT_LOCK (selpad);
|
|
if (selpad->always_ok)
|
|
res = GST_FLOW_OK;
|
|
else
|
|
res = GST_FLOW_NOT_LINKED;
|
|
GST_OBJECT_UNLOCK (selpad);
|
|
|
|
goto done;
|
|
}
|
|
flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
gst_buffer_unref (buf);
|
|
res = GST_FLOW_WRONG_STATE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static void gst_input_selector_init (GstInputSelector * sel);
|
|
static void gst_input_selector_base_init (GstInputSelectorClass * klass);
|
|
static void gst_input_selector_class_init (GstInputSelectorClass * klass);
|
|
|
|
static void gst_input_selector_dispose (GObject * object);
|
|
|
|
static void gst_input_selector_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec);
|
|
static void gst_input_selector_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec);
|
|
|
|
static GstPad *gst_input_selector_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * unused);
|
|
static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
|
|
|
|
static GstStateChangeReturn gst_input_selector_change_state (GstElement *
|
|
element, GstStateChange transition);
|
|
|
|
static GstCaps *gst_input_selector_getcaps (GstPad * pad);
|
|
static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
|
|
static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
|
|
static gint64 gst_input_selector_block (GstInputSelector * self);
|
|
static void gst_input_selector_switch (GstInputSelector * self,
|
|
GstPad * pad, gint64 stop_time, gint64 start_time);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
|
|
GType
|
|
gst_input_selector_get_type (void)
|
|
{
|
|
static GType input_selector_type = 0;
|
|
|
|
if (!input_selector_type) {
|
|
static const GTypeInfo input_selector_info = {
|
|
sizeof (GstInputSelectorClass),
|
|
(GBaseInitFunc) gst_input_selector_base_init,
|
|
NULL,
|
|
(GClassInitFunc) gst_input_selector_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstInputSelector),
|
|
0,
|
|
(GInstanceInitFunc) gst_input_selector_init,
|
|
};
|
|
input_selector_type =
|
|
g_type_register_static (GST_TYPE_ELEMENT,
|
|
"GstInputSelector", &input_selector_info, 0);
|
|
GST_DEBUG_CATEGORY_INIT (input_selector_debug,
|
|
"input-selector", 0, "An input stream selector element");
|
|
}
|
|
|
|
return input_selector_type;
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_base_init (GstInputSelectorClass * klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gst_element_class_set_details (element_class, &gst_input_selector_details);
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_input_selector_sink_factory));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_input_selector_src_factory));
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_class_init (GstInputSelectorClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->dispose = gst_input_selector_dispose;
|
|
|
|
gobject_class->set_property =
|
|
GST_DEBUG_FUNCPTR (gst_input_selector_set_property);
|
|
gobject_class->get_property =
|
|
GST_DEBUG_FUNCPTR (gst_input_selector_get_property);
|
|
|
|
g_object_class_install_property (gobject_class, PROP_N_PADS,
|
|
g_param_spec_uint ("n-pads", "Number of Pads",
|
|
"The number of sink pads", 0, G_MAXUINT, 0, G_PARAM_READABLE));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
|
|
g_param_spec_object ("active-pad", "Active pad",
|
|
"The currently active sink pad", GST_TYPE_PAD, G_PARAM_READWRITE));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_SELECT_ALL,
|
|
g_param_spec_boolean ("select-all", "Select all mode",
|
|
"Forwards data from all input pads", FALSE, G_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GstInputSelector::block:
|
|
* @inputselector: the #GstInputSelector
|
|
*
|
|
* Block all sink pads in preparation for a switch. Returns the stop time of
|
|
* the current switch segment, as a running time, or 0 if there is no current
|
|
* active pad or the current active pad never received data.
|
|
*/
|
|
gst_input_selector_signals[SIGNAL_BLOCK] =
|
|
g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
|
|
G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
|
|
gst_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
|
|
/**
|
|
* GstInputSelector::switch:
|
|
* @inputselector: the #GstInputSelector
|
|
* @pad: the pad to switch to
|
|
* @stop_time: running time at which to close the previous segment, or -1
|
|
* to use the running time of the previously active sink pad
|
|
* @start_time: running time at which to start the new segment, or -1 to
|
|
* use the running time of the newly active sink pad
|
|
*
|
|
* Switch to a new feed. The segment opened by the previously active pad, if
|
|
* any, will be closed, and a new segment opened before data flows again.
|
|
*
|
|
* This signal must be emitted when the element has been blocked via the <link
|
|
* linkend="GstInputSelector-block">block</link> signal.
|
|
*
|
|
* If you have a stream with only one switch element, such as an audio-only
|
|
* stream, a stream switch should be performed by first emitting the block
|
|
* signal, and then emitting the switch signal with -1 for the stop and start
|
|
* time values.
|
|
*
|
|
* The intention of the @stop_time and @start_time arguments is to allow
|
|
* multiple switch elements to switch and maintain stream synchronization.
|
|
* When switching a stream with multiple feeds, you will need as many switch
|
|
* elements as you have feeds. For example, a feed with audio and video will
|
|
* have one switch element between the audio feeds and one for video.
|
|
*
|
|
* A switch over multiple switch elements should be performed as follows:
|
|
* First, emit the <link linkend="GstInputSelector-block">block</link>
|
|
* signal, collecting the returned values. The maximum running time returned
|
|
* by block should then be used as the time at which to close the previous
|
|
* segment.
|
|
*
|
|
* Then, query the running times of the new audio and video pads that you will
|
|
* switch to. Naturally, these pads are on separate switch elements. Take the
|
|
* minimum running time for those streams and use it for the time at which to
|
|
* open the new segment.
|
|
*
|
|
* If @pad is the same as the current active pad, the element will cancel any
|
|
* previous block without adjusting segments.
|
|
*
|
|
* <note><simpara>
|
|
* the signal changed from accepting the pad name to the pad object.
|
|
* </simpara></note>
|
|
*
|
|
* Since: 0.10.7
|
|
*/
|
|
gst_input_selector_signals[SIGNAL_SWITCH] =
|
|
g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
|
|
G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
|
|
NULL, NULL, gst_selector_marshal_VOID__OBJECT_INT64_INT64,
|
|
G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
|
|
|
|
gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
|
|
gstelement_class->release_pad = gst_input_selector_release_pad;
|
|
gstelement_class->change_state = gst_input_selector_change_state;
|
|
|
|
klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
|
|
/* note the underscore because switch is a keyword otherwise */
|
|
klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_init (GstInputSelector * sel)
|
|
{
|
|
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
|
|
gst_pad_set_internal_link_function (sel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
|
|
gst_pad_set_getcaps_function (sel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
|
|
gst_pad_set_query_function (sel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_input_selector_query));
|
|
gst_pad_set_event_function (sel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_input_selector_event));
|
|
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
|
|
/* sinkpad management */
|
|
sel->active_sinkpad = NULL;
|
|
sel->padcount = 0;
|
|
gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
|
|
|
|
sel->lock = g_mutex_new ();
|
|
sel->cond = g_cond_new ();
|
|
sel->blocked = FALSE;
|
|
|
|
sel->select_all = FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_dispose (GObject * object)
|
|
{
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
|
|
|
|
if (sel->active_sinkpad) {
|
|
gst_object_unref (sel->active_sinkpad);
|
|
sel->active_sinkpad = NULL;
|
|
}
|
|
if (sel->lock) {
|
|
g_mutex_free (sel->lock);
|
|
sel->lock = NULL;
|
|
}
|
|
if (sel->cond) {
|
|
g_cond_free (sel->cond);
|
|
sel->cond = NULL;
|
|
}
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
/* Solve the following equation for B.timestamp, and set that as the segment
|
|
* stop:
|
|
* B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
|
|
*/
|
|
static gint64
|
|
gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
|
|
{
|
|
return (running_time - segment->accum) * segment->abs_rate + segment->start;
|
|
}
|
|
|
|
static void
|
|
gst_segment_set_stop (GstSegment * segment, gint64 running_time)
|
|
{
|
|
segment->stop = gst_segment_get_timestamp (segment, running_time);
|
|
segment->last_stop = -1;
|
|
}
|
|
|
|
static void
|
|
gst_segment_set_start (GstSegment * segment, gint64 running_time)
|
|
{
|
|
gint64 new_start, duration;
|
|
|
|
new_start = gst_segment_get_timestamp (segment, running_time);
|
|
|
|
/* this is the duration we skipped */
|
|
duration = new_start - segment->start;
|
|
/* add the duration to the accumulated segment time */
|
|
segment->accum += duration;
|
|
/* move position in the segment */
|
|
segment->time += duration;
|
|
segment->start += duration;
|
|
}
|
|
|
|
/* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
|
|
* active pad changed. */
|
|
static gboolean
|
|
gst_input_selector_set_active_pad (GstInputSelector * self,
|
|
GstPad * pad, gint64 stop_time, gint64 start_time)
|
|
{
|
|
GstSelectorPad *old, *new;
|
|
GstPad **active_pad_p;
|
|
|
|
if (pad == self->active_sinkpad)
|
|
return FALSE;
|
|
|
|
old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
|
|
new = GST_SELECTOR_PAD_CAST (pad);
|
|
|
|
GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
|
|
GST_DEBUG_PAD_NAME (new));
|
|
|
|
if (stop_time == -1 && old) {
|
|
/* no stop time given, get the latest running_time on the active pad to
|
|
* close and open the new segment */
|
|
stop_time = start_time = gst_selector_pad_get_running_time (old);
|
|
GST_DEBUG_OBJECT (self, "using start/stop of %" G_GINT64_FORMAT,
|
|
start_time);
|
|
}
|
|
|
|
if (old && old->active && !self->pending_close && stop_time >= 0) {
|
|
/* schedule a last_stop update if one isn't already scheduled, and a
|
|
segment has been pushed before. */
|
|
memcpy (&self->segment, &old->segment, sizeof (self->segment));
|
|
|
|
GST_DEBUG_OBJECT (self, "setting stop_time to %" G_GINT64_FORMAT,
|
|
stop_time);
|
|
gst_segment_set_stop (&self->segment, stop_time);
|
|
self->pending_close = TRUE;
|
|
}
|
|
|
|
if (new && new->active && start_time >= 0) {
|
|
GST_DEBUG_OBJECT (self, "setting start_time to %" G_GINT64_FORMAT,
|
|
start_time);
|
|
/* schedule a new segment push */
|
|
gst_segment_set_start (&new->segment, start_time);
|
|
new->segment_pending = TRUE;
|
|
}
|
|
|
|
active_pad_p = &self->active_sinkpad;
|
|
gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
|
|
GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
|
|
self->active_sinkpad);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_ACTIVE_PAD:
|
|
{
|
|
GstPad *pad;
|
|
|
|
pad = g_value_get_object (value);
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
gst_input_selector_set_active_pad (sel, pad,
|
|
GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
break;
|
|
}
|
|
case PROP_SELECT_ALL:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
sel->select_all = g_value_get_boolean (value);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_N_PADS:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_uint (value, sel->n_pads);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
case PROP_ACTIVE_PAD:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_object (value, sel->active_sinkpad);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
case PROP_SELECT_ALL:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_boolean (value, sel->select_all);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstPad *
|
|
gst_input_selector_get_linked_pad (GstPad * pad, gboolean strict)
|
|
{
|
|
GstInputSelector *sel;
|
|
GstPad *otherpad = NULL;
|
|
|
|
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
if (pad == sel->srcpad)
|
|
otherpad = sel->active_sinkpad;
|
|
else if (pad == sel->active_sinkpad || !strict)
|
|
otherpad = sel->srcpad;
|
|
if (otherpad)
|
|
gst_object_ref (otherpad);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
gst_object_unref (sel);
|
|
|
|
return otherpad;
|
|
}
|
|
|
|
static gboolean
|
|
gst_input_selector_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
gboolean res = FALSE;
|
|
GstPad *otherpad;
|
|
|
|
otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
|
|
|
|
if (otherpad) {
|
|
res = gst_pad_push_event (otherpad, event);
|
|
|
|
gst_object_unref (otherpad);
|
|
} else
|
|
gst_event_unref (event);
|
|
return res;
|
|
}
|
|
|
|
/* query on the srcpad. We override this function because by default it will
|
|
* only forward the query to one random sinkpad */
|
|
static gboolean
|
|
gst_input_selector_query (GstPad * pad, GstQuery * query)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstInputSelector *sel;
|
|
GstPad *otherpad;
|
|
|
|
sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
|
|
|
|
otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
GList *walk;
|
|
GstClockTime resmin, resmax;
|
|
gboolean reslive;
|
|
|
|
resmin = 0;
|
|
resmax = -1;
|
|
reslive = FALSE;
|
|
|
|
/* assume FALSE, we become TRUE if one query succeeds */
|
|
res = FALSE;
|
|
|
|
/* perform the query on all sinkpads and combine the results. We take the
|
|
* max of min and the min of max for the result latency. */
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
|
|
walk = g_list_next (walk)) {
|
|
GstPad *sinkpad = GST_PAD_CAST (walk->data);
|
|
|
|
if (gst_pad_peer_query (sinkpad, query)) {
|
|
GstClockTime min, max;
|
|
gboolean live;
|
|
|
|
/* one query succeeded, we succeed too */
|
|
res = TRUE;
|
|
|
|
gst_query_parse_latency (query, &live, &min, &max);
|
|
|
|
GST_DEBUG_OBJECT (sinkpad,
|
|
"peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
|
|
", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
|
|
|
|
if (live) {
|
|
if (min > resmin)
|
|
resmin = min;
|
|
if (resmax == -1)
|
|
resmax = max;
|
|
else if (max < resmax)
|
|
resmax = max;
|
|
if (reslive == FALSE)
|
|
reslive = live;
|
|
}
|
|
}
|
|
}
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
if (res) {
|
|
gst_query_set_latency (query, reslive, resmin, resmax);
|
|
|
|
GST_DEBUG_OBJECT (sel,
|
|
"total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
|
|
", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
|
|
reslive);
|
|
}
|
|
|
|
break;
|
|
}
|
|
default:
|
|
if (otherpad)
|
|
res = gst_pad_peer_query (otherpad, query);
|
|
break;
|
|
}
|
|
if (otherpad)
|
|
gst_object_unref (otherpad);
|
|
gst_object_unref (sel);
|
|
|
|
return res;
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_input_selector_getcaps (GstPad * pad)
|
|
{
|
|
GstPad *otherpad;
|
|
GstObject *parent;
|
|
GstCaps *caps;
|
|
|
|
parent = gst_object_get_parent (GST_OBJECT (pad));
|
|
|
|
otherpad = gst_input_selector_get_linked_pad (pad, FALSE);
|
|
|
|
if (!otherpad) {
|
|
if (GST_INPUT_SELECTOR (parent)->select_all) {
|
|
GST_DEBUG_OBJECT (parent,
|
|
"Pad %s:%s not linked, returning merge of caps",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
caps = gst_pad_proxy_getcaps (pad);
|
|
} else {
|
|
GST_DEBUG_OBJECT (parent,
|
|
"Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
|
|
caps = gst_caps_new_any ();
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (parent,
|
|
"Pad %s:%s is linked (to %s:%s), returning peer caps",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
|
|
/* if the peer has caps, use those. If the pad is not linked, this function
|
|
* returns NULL and we return ANY */
|
|
if (!(caps = gst_pad_peer_get_caps (otherpad)))
|
|
caps = gst_caps_new_any ();
|
|
gst_object_unref (otherpad);
|
|
}
|
|
|
|
gst_object_unref (parent);
|
|
return caps;
|
|
}
|
|
|
|
/* check if the pad is the active sinkpad */
|
|
static gboolean
|
|
gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
|
|
{
|
|
GstSelectorPad *selpad;
|
|
gboolean res;
|
|
|
|
selpad = GST_SELECTOR_PAD_CAST (pad);
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
res = (pad == sel->active_sinkpad);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
return res;
|
|
}
|
|
|
|
/* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
|
|
static GstPad *
|
|
gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
|
|
{
|
|
GstPad *active_sinkpad;
|
|
GstSelectorPad *selpad;
|
|
|
|
selpad = GST_SELECTOR_PAD_CAST (pad);
|
|
|
|
selpad->active = TRUE;
|
|
active_sinkpad = sel->active_sinkpad;
|
|
if (active_sinkpad == NULL || sel->select_all) {
|
|
/* first pad we get activity on becomes the activated pad by default, if we
|
|
* select all, we also remember the last used pad. */
|
|
if (sel->active_sinkpad)
|
|
gst_object_unref (sel->active_sinkpad);
|
|
active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
|
|
GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
}
|
|
|
|
return active_sinkpad;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_input_selector_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * unused)
|
|
{
|
|
GstInputSelector *sel;
|
|
gchar *name = NULL;
|
|
GstPad *sinkpad = NULL;
|
|
|
|
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
|
|
|
|
sel = GST_INPUT_SELECTOR (element);
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
|
|
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
|
|
name = g_strdup_printf ("sink%d", sel->padcount++);
|
|
sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
|
|
"name", name, "direction", templ->direction, "template", templ, NULL);
|
|
g_free (name);
|
|
|
|
sel->n_pads++;
|
|
|
|
gst_pad_set_event_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_event));
|
|
gst_pad_set_getcaps_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
|
|
gst_pad_set_chain_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
|
|
gst_pad_set_internal_link_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
|
|
gst_pad_set_bufferalloc_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_bufferalloc));
|
|
|
|
gst_pad_set_active (sinkpad, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
return sinkpad;
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_release_pad (GstElement * element, GstPad * pad)
|
|
{
|
|
GstInputSelector *sel;
|
|
|
|
sel = GST_INPUT_SELECTOR (element);
|
|
GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
/* if the pad was the active pad, makes us select a new one */
|
|
if (sel->active_sinkpad == pad) {
|
|
GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
gst_object_unref (sel->active_sinkpad);
|
|
sel->active_sinkpad = NULL;
|
|
}
|
|
sel->n_pads--;
|
|
|
|
gst_pad_set_active (pad, FALSE);
|
|
gst_element_remove_pad (GST_ELEMENT (sel), pad);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_reset (GstInputSelector * sel)
|
|
{
|
|
GList *walk;
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
/* clear active pad */
|
|
if (sel->active_sinkpad) {
|
|
gst_object_unref (sel->active_sinkpad);
|
|
sel->active_sinkpad = NULL;
|
|
}
|
|
/* reset segment */
|
|
gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
|
|
sel->pending_close = FALSE;
|
|
/* reset each of our sinkpads state */
|
|
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
|
|
GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
|
|
|
|
gst_selector_pad_reset (selpad);
|
|
|
|
if (selpad->tags) {
|
|
gst_tag_list_free (selpad->tags);
|
|
selpad->tags = NULL;
|
|
}
|
|
}
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_input_selector_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstInputSelector *self = GST_INPUT_SELECTOR (element);
|
|
GstStateChangeReturn result;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_INPUT_SELECTOR_LOCK (self);
|
|
self->blocked = FALSE;
|
|
self->flushing = FALSE;
|
|
GST_INPUT_SELECTOR_UNLOCK (self);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
/* first unlock before we call the parent state change function, which
|
|
* tries to acquire the stream lock when going to ready. */
|
|
GST_INPUT_SELECTOR_LOCK (self);
|
|
self->blocked = FALSE;
|
|
self->flushing = TRUE;
|
|
GST_INPUT_SELECTOR_BROADCAST (self);
|
|
GST_INPUT_SELECTOR_UNLOCK (self);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
gst_input_selector_reset (self);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gint64
|
|
gst_input_selector_block (GstInputSelector * self)
|
|
{
|
|
gint64 ret = 0;
|
|
GstSelectorPad *spad;
|
|
|
|
GST_INPUT_SELECTOR_LOCK (self);
|
|
|
|
if (self->blocked)
|
|
GST_WARNING_OBJECT (self, "switch already blocked");
|
|
|
|
self->blocked = TRUE;
|
|
spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
|
|
|
|
if (spad)
|
|
ret = gst_selector_pad_get_running_time (spad);
|
|
else
|
|
GST_DEBUG_OBJECT (self, "no active pad while blocking");
|
|
|
|
GST_INPUT_SELECTOR_UNLOCK (self);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* stop_time and start_time are running times */
|
|
static void
|
|
gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
|
|
gint64 stop_time, gint64 start_time)
|
|
{
|
|
gboolean changed;
|
|
|
|
g_return_if_fail (self->blocked == TRUE);
|
|
|
|
GST_INPUT_SELECTOR_LOCK (self);
|
|
changed =
|
|
gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
|
|
|
|
self->blocked = FALSE;
|
|
GST_INPUT_SELECTOR_BROADCAST (self);
|
|
GST_INPUT_SELECTOR_UNLOCK (self);
|
|
|
|
if (changed)
|
|
g_object_notify (G_OBJECT (self), "active-pad");
|
|
}
|
|
|
|
static gboolean
|
|
gst_input_selector_check_eos (GstElement * selector)
|
|
{
|
|
GstIterator *it = gst_element_iterate_sink_pads (selector);
|
|
GstIteratorResult ires;
|
|
gpointer item;
|
|
gboolean done = FALSE, is_eos = FALSE;
|
|
GstSelectorPad *pad;
|
|
|
|
while (!done) {
|
|
ires = gst_iterator_next (it, &item);
|
|
switch (ires) {
|
|
case GST_ITERATOR_DONE:
|
|
GST_INFO_OBJECT (selector, "all sink pads have eos");
|
|
done = TRUE;
|
|
is_eos = TRUE;
|
|
break;
|
|
case GST_ITERATOR_OK:
|
|
pad = GST_SELECTOR_PAD_CAST (item);
|
|
if (!pad->eos) {
|
|
done = TRUE;
|
|
}
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
gst_iterator_resync (it);
|
|
break;
|
|
default:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (it);
|
|
|
|
return is_eos;
|
|
}
|