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1767 lines
55 KiB
C
1767 lines
55 KiB
C
/* GStreamer input selector
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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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* Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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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* The input pads are from a GstPad subclass and have additional
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* properties, which users may find useful, namely:
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*
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* <itemizedlist>
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* <listitem>
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* "running-time": Running time of stream on pad (#gint64)
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* </listitem>
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* <listitem>
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* "tags": The currently active tags on the pad (#GstTagList, boxed type)
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* </listitem>
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* <listitem>
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* "active": If the pad is currently active (#gboolean)
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* </listitem>
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* <listitem>
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* "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
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* #GST_FLOW_NOT_LINKED
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* </listitem>
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* </itemizedlist>
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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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#define DEBUG_CACHED_BUFFERS 0
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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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#define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
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static GType
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gst_input_selector_sync_mode_get_type (void)
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{
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static GType type = 0;
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static const GEnumValue data[] = {
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{GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
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"Sync using the current active segment",
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"active-segment"},
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{GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
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{0, NULL, NULL},
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};
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if (!type) {
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type = g_enum_register_static ("GstInputSelectorSyncMode", data);
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}
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return type;
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}
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#define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
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#define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
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#define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
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#define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
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#define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
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GST_INPUT_SELECTOR_GET_LOCK(sel)))
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#define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
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static GstStaticPadTemplate gst_input_selector_sink_factory =
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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 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_SYNC_STREAMS,
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PROP_SYNC_MODE,
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PROP_CACHE_BUFFERS
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};
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#define DEFAULT_SYNC_STREAMS TRUE
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#define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
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#define DEFAULT_CACHE_BUFFERS FALSE
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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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};
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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 void gst_input_selector_active_pad_changed (GstInputSelector * sel,
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GParamSpec * pspec, gpointer user_data);
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static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
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sel, 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 (GstInputSelector * sel,
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GstPad * pad, gboolean strict);
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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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typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
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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 pushed; /* when buffer was pushed downstream since activation */
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gboolean eos; /* when EOS has been received */
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gboolean eos_sent; /* when EOS was sent downstream */
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gboolean discont; /* after switching we create a discont */
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gboolean flushing; /* set after flush-start and before flush-stop */
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gboolean always_ok;
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GstTagList *tags; /* last tags received on the pad */
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GstClockTime position; /* the current position in the segment */
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GstSegment segment; /* the current segment on the pad */
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guint32 segment_seqnum; /* sequence number of the current segment */
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gboolean events_pending; /* TRUE if sticky events need to be updated */
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gboolean sending_cached_buffers;
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GQueue *cached_buffers;
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};
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struct _GstSelectorPadCachedBuffer
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{
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GstBuffer *buffer;
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GstSegment segment;
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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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GType gst_selector_pad_get_type (void);
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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 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, GstObject * parent,
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GstEvent * event);
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static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
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GstObject * parent);
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static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buf);
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static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
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GstBuffer * buffer);
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static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
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G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
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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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gobject_class->finalize = gst_selector_pad_finalize;
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gobject_class->get_property = gst_selector_pad_get_property;
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gobject_class->set_property = 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,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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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 | G_PARAM_STATIC_STRINGS));
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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,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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/* FIXME: better property name? */
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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 | G_PARAM_STATIC_STRINGS));
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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_unref (pad->tags);
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gst_selector_pad_free_cached_buffers (pad);
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G_OBJECT_CLASS (gst_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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guint64 position = pad->position;
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GstFormat format = pad->segment.format;
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ret = gst_segment_to_running_time (&pad->segment, format, position);
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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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" segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
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return ret;
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}
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/* must be called with the SELECTOR_LOCK */
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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->pushed = FALSE;
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pad->eos = FALSE;
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pad->eos_sent = FALSE;
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pad->events_pending = FALSE;
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pad->discont = FALSE;
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pad->flushing = FALSE;
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pad->position = GST_CLOCK_TIME_NONE;
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gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
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pad->sending_cached_buffers = FALSE;
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gst_selector_pad_free_cached_buffers (pad);
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GST_OBJECT_UNLOCK (pad);
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}
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static GstSelectorPadCachedBuffer *
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gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
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{
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GstSelectorPadCachedBuffer *cached_buffer =
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g_slice_new (GstSelectorPadCachedBuffer);
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cached_buffer->buffer = buffer;
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cached_buffer->segment = selpad->segment;
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return cached_buffer;
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}
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static void
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gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
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{
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gst_buffer_unref (cached_buffer->buffer);
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g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
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}
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/* must be called with the SELECTOR_LOCK */
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static void
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gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
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{
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if (selpad->segment.format != GST_FORMAT_TIME) {
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GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
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"not caching", buffer);
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return;
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}
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GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
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if (!selpad->cached_buffers)
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selpad->cached_buffers = g_queue_new ();
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g_queue_push_tail (selpad->cached_buffers,
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gst_selector_pad_new_cached_buffer (selpad, buffer));
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}
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/* must be called with the SELECTOR_LOCK */
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static void
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gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
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{
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GstSelectorPadCachedBuffer *cached_buffer;
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if (!selpad->cached_buffers)
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return;
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GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
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while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
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gst_selector_pad_free_cached_buffer (cached_buffer);
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g_queue_free (selpad->cached_buffers);
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selpad->cached_buffers = NULL;
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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 GstIterator *
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gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
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{
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GstInputSelector *sel;
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GstPad *otherpad;
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GstIterator *it = NULL;
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GValue val = { 0, };
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sel = GST_INPUT_SELECTOR (parent);
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otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
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if (otherpad) {
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g_value_init (&val, GST_TYPE_PAD);
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g_value_set_object (&val, otherpad);
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it = gst_iterator_new_single (GST_TYPE_PAD, &val);
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g_value_unset (&val);
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gst_object_unref (otherpad);
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}
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return it;
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}
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static gboolean
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gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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gboolean res = TRUE;
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gboolean forward;
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gboolean new_tags = FALSE;
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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 (parent);
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selpad = GST_SELECTOR_PAD_CAST (pad);
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GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
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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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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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}
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GST_INPUT_SELECTOR_LOCK (sel);
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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 */
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forward = (pad == active_sinkpad);
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switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
/* Unblock the pad if it's waiting */
|
|
selpad->flushing = TRUE;
|
|
GST_INPUT_SELECTOR_BROADCAST (sel);
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
gst_selector_pad_reset (selpad);
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
gst_event_copy_segment (event, &selpad->segment);
|
|
selpad->segment_seqnum = gst_event_get_seqnum (event);
|
|
|
|
/* Update the position */
|
|
if (selpad->position == GST_CLOCK_TIME_NONE
|
|
|| selpad->segment.position > selpad->position) {
|
|
selpad->position = selpad->segment.position;
|
|
} else if (selpad->position != GST_CLOCK_TIME_NONE
|
|
&& selpad->position > selpad->segment.position) {
|
|
selpad->segment.position = selpad->position;
|
|
|
|
if (forward) {
|
|
gst_event_unref (event);
|
|
event = gst_event_new_segment (&selpad->segment);
|
|
gst_event_set_seqnum (event, selpad->segment_seqnum);
|
|
}
|
|
}
|
|
GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
|
|
&selpad->segment);
|
|
break;
|
|
}
|
|
case GST_EVENT_TAG:
|
|
{
|
|
GstTagList *tags, *oldtags, *newtags;
|
|
|
|
gst_event_parse_tag (event, &tags);
|
|
|
|
oldtags = selpad->tags;
|
|
|
|
newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
|
|
selpad->tags = newtags;
|
|
if (oldtags)
|
|
gst_tag_list_unref (oldtags);
|
|
GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
|
|
|
|
new_tags = TRUE;
|
|
break;
|
|
}
|
|
case GST_EVENT_EOS:
|
|
selpad->eos = TRUE;
|
|
|
|
if (forward) {
|
|
selpad->eos_sent = TRUE;
|
|
} else {
|
|
GstSelectorPad *active_selpad;
|
|
|
|
/* If the active sinkpad is in EOS state but EOS
|
|
* was not sent downstream this means that the pad
|
|
* got EOS before it was set as active pad and that
|
|
* the previously active pad got EOS after it was
|
|
* active
|
|
*/
|
|
active_selpad = GST_SELECTOR_PAD (active_sinkpad);
|
|
forward = (active_selpad->eos && !active_selpad->eos_sent);
|
|
active_selpad->eos_sent = TRUE;
|
|
}
|
|
GST_DEBUG_OBJECT (pad, "received EOS");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
if (new_tags)
|
|
g_object_notify (G_OBJECT (selpad), "tags");
|
|
if (forward) {
|
|
GST_DEBUG_OBJECT (pad, "forwarding event");
|
|
res = gst_pad_push_event (sel->srcpad, event);
|
|
} else {
|
|
/* If we aren't forwarding the event because the pad is not the
|
|
* active_sinkpad, then set the flag on the pad
|
|
* that says a segment needs sending if/when that pad is activated.
|
|
* For all other cases, we send the event immediately, which makes
|
|
* sparse streams and other segment updates work correctly downstream.
|
|
*/
|
|
if (GST_EVENT_IS_STICKY (event))
|
|
selpad->events_pending = TRUE;
|
|
gst_event_unref (event);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean res = FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_ALLOCATION:{
|
|
GstPad *active_sinkpad;
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
|
|
|
|
/* Only do the allocation query for the active sinkpad,
|
|
* after switching a reconfigure event is sent and upstream
|
|
* should reconfigure and do a new allocation query
|
|
*/
|
|
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
if (pad != active_sinkpad) {
|
|
res = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
/* fall through */
|
|
default:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
done:
|
|
return res;
|
|
}
|
|
|
|
/* 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, GstSelectorPad * pad)
|
|
{
|
|
while (self->blocked && !self->flushing && !pad->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;
|
|
}
|
|
|
|
/* must be called without the SELECTOR_LOCK, will wait until the running time
|
|
* of the active pad is after this pad or return TRUE when flushing */
|
|
static gboolean
|
|
gst_input_selector_wait_running_time (GstInputSelector * sel,
|
|
GstSelectorPad * selpad, GstBuffer * buf)
|
|
{
|
|
GstSegment *seg;
|
|
|
|
GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
|
|
|
|
/* If we have no valid timestamp we can't sync this buffer */
|
|
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
|
|
GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
|
|
"invalid timestamp");
|
|
return FALSE;
|
|
}
|
|
|
|
seg = &selpad->segment;
|
|
|
|
/* Wait until
|
|
* a) this is the active pad
|
|
* b) the pad or the selector is flushing
|
|
* c) the selector is not blocked
|
|
* d) the buffer running time is before the current running time
|
|
* (either active-seg or clock, depending on sync-mode)
|
|
*/
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
while (TRUE) {
|
|
GstPad *active_sinkpad;
|
|
GstSelectorPad *active_selpad;
|
|
GstClock *clock;
|
|
gint64 cur_running_time;
|
|
GstClockTime running_time;
|
|
|
|
active_sinkpad =
|
|
gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
|
|
active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
|
|
|
|
if (seg->format != GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"Not waiting because we don't have a TIME segment");
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
return FALSE;
|
|
}
|
|
|
|
running_time = GST_BUFFER_TIMESTAMP (buf);
|
|
/* If possible try to get the running time at the end of the buffer */
|
|
if (GST_BUFFER_DURATION_IS_VALID (buf))
|
|
running_time += GST_BUFFER_DURATION (buf);
|
|
/* Only use the segment to convert to running time if the segment is
|
|
* in TIME format, otherwise do our best to try to sync */
|
|
if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
|
|
if (running_time > seg->stop) {
|
|
running_time = seg->stop;
|
|
}
|
|
}
|
|
running_time =
|
|
gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
|
|
/* If this is outside the segment don't sync */
|
|
if (running_time == -1) {
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"Not waiting because buffer is outside segment");
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
return FALSE;
|
|
}
|
|
|
|
cur_running_time = GST_CLOCK_TIME_NONE;
|
|
if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
|
|
clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
|
|
if (clock) {
|
|
GstClockTime base_time;
|
|
|
|
cur_running_time = gst_clock_get_time (clock);
|
|
base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
|
|
if (base_time <= cur_running_time)
|
|
cur_running_time -= base_time;
|
|
else
|
|
cur_running_time = 0;
|
|
}
|
|
} else {
|
|
GstSegment *active_seg;
|
|
|
|
active_seg = &active_selpad->segment;
|
|
|
|
/* If the active segment is configured but not to time format
|
|
* we can't do any syncing at all */
|
|
if (active_seg->format != GST_FORMAT_TIME
|
|
&& active_seg->format != GST_FORMAT_UNDEFINED) {
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"Not waiting because active segment isn't in TIME format");
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Get active pad's running time, if no configured segment yet keep at -1 */
|
|
if (active_seg->format == GST_FORMAT_TIME)
|
|
cur_running_time = gst_segment_to_running_time (active_seg,
|
|
GST_FORMAT_TIME, active_seg->position);
|
|
}
|
|
|
|
if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
|
|
(sel->blocked || cur_running_time == -1
|
|
|| running_time >= cur_running_time)) {
|
|
if (!sel->blocked) {
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
|
|
GST_TIME_ARGS (cur_running_time));
|
|
} else
|
|
GST_DEBUG_OBJECT (selpad, "Waiting for selector to unblock");
|
|
|
|
GST_INPUT_SELECTOR_WAIT (sel);
|
|
} else {
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Return TRUE if the selector or the pad is flushing */
|
|
return (sel->flushing || selpad->flushing);
|
|
}
|
|
|
|
static gboolean
|
|
forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
|
|
{
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
|
|
|
|
if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
|
|
GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
|
|
GstEvent *e;
|
|
|
|
e = gst_event_new_segment (seg);
|
|
gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
|
|
|
|
gst_pad_push_event (sel->srcpad, e);
|
|
} else if (GST_EVENT_TYPE (*event) != GST_EVENT_STREAM_START) {
|
|
gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#if DEBUG_CACHED_BUFFERS
|
|
static void
|
|
gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
|
|
{
|
|
GList *walk;
|
|
|
|
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
|
|
GstSelectorPad *selpad;
|
|
GString *timestamps;
|
|
gchar *str;
|
|
int i;
|
|
|
|
selpad = GST_SELECTOR_PAD_CAST (walk->data);
|
|
if (!selpad->cached_buffers) {
|
|
GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
|
|
continue;
|
|
}
|
|
|
|
timestamps = g_string_new ("Cached buffers timestamps:");
|
|
for (i = 0; i < selpad->cached_buffers->length; ++i) {
|
|
GstSelectorPadCachedBuffer *cached_buffer;
|
|
|
|
cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
|
|
g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
|
|
}
|
|
str = g_string_free (timestamps, FALSE);
|
|
GST_DEBUG_OBJECT (selpad, str);
|
|
g_free (str);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* must be called with the SELECTOR_LOCK */
|
|
static void
|
|
gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
|
|
GstPad * pad)
|
|
{
|
|
GstClock *clock;
|
|
gint64 cur_running_time;
|
|
GList *walk;
|
|
|
|
cur_running_time = GST_CLOCK_TIME_NONE;
|
|
if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
|
|
clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
|
|
if (clock) {
|
|
GstClockTime base_time;
|
|
|
|
cur_running_time = gst_clock_get_time (clock);
|
|
base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
|
|
if (base_time <= cur_running_time)
|
|
cur_running_time -= base_time;
|
|
else
|
|
cur_running_time = 0;
|
|
|
|
gst_object_unref (clock);
|
|
}
|
|
} else {
|
|
GstPad *active_sinkpad;
|
|
GstSelectorPad *active_selpad;
|
|
GstSegment *active_seg;
|
|
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
|
|
active_seg = &active_selpad->segment;
|
|
|
|
/* Get active pad's running time, if no configured segment yet keep at -1 */
|
|
if (active_seg->format == GST_FORMAT_TIME)
|
|
cur_running_time = gst_segment_to_running_time (active_seg,
|
|
GST_FORMAT_TIME, active_seg->position);
|
|
}
|
|
|
|
if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
|
|
return;
|
|
|
|
GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
|
|
for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
|
|
GstSelectorPad *selpad;
|
|
GstSegment *seg;
|
|
GstSelectorPadCachedBuffer *cached_buffer;
|
|
GSList *maybe_remove;
|
|
guint queue_position;
|
|
|
|
selpad = GST_SELECTOR_PAD_CAST (walk->data);
|
|
if (!selpad->cached_buffers)
|
|
continue;
|
|
|
|
seg = &selpad->segment;
|
|
|
|
maybe_remove = NULL;
|
|
queue_position = 0;
|
|
while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
|
|
queue_position))) {
|
|
GstBuffer *buffer = cached_buffer->buffer;
|
|
GstClockTime running_time;
|
|
GSList *l;
|
|
|
|
/* If we have no valid timestamp we can't sync this buffer */
|
|
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
|
|
maybe_remove = g_slist_append (maybe_remove, cached_buffer);
|
|
queue_position = g_slist_length (maybe_remove);
|
|
continue;
|
|
}
|
|
|
|
/* the buffer is still valid if its duration is valid and the
|
|
* timestamp + duration is >= time, or if its duration is invalid
|
|
* and the timestamp is >= time */
|
|
running_time = GST_BUFFER_TIMESTAMP (buffer);
|
|
/* If possible try to get the running time at the end of the buffer */
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer))
|
|
running_time += GST_BUFFER_DURATION (buffer);
|
|
/* Only use the segment to convert to running time if the segment is
|
|
* in TIME format, otherwise do our best to try to sync */
|
|
if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
|
|
if (running_time > seg->stop) {
|
|
running_time = seg->stop;
|
|
}
|
|
}
|
|
running_time =
|
|
gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
|
|
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"checking if buffer %p running time=%" GST_TIME_FORMAT
|
|
" >= stream time=%" GST_TIME_FORMAT, buffer,
|
|
GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
|
|
if (running_time >= cur_running_time) {
|
|
break;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
|
|
g_queue_pop_nth (selpad->cached_buffers, queue_position);
|
|
gst_selector_pad_free_cached_buffer (cached_buffer);
|
|
|
|
for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
|
|
/* A buffer after some invalid buffers was removed, it means the invalid buffers
|
|
* are old, lets also remove them */
|
|
cached_buffer = l->data;
|
|
g_queue_remove (selpad->cached_buffers, cached_buffer);
|
|
gst_selector_pad_free_cached_buffer (cached_buffer);
|
|
}
|
|
|
|
g_slist_free (maybe_remove);
|
|
maybe_remove = NULL;
|
|
queue_position = 0;
|
|
}
|
|
|
|
g_slist_free (maybe_remove);
|
|
maybe_remove = NULL;
|
|
|
|
if (g_queue_is_empty (selpad->cached_buffers)) {
|
|
g_queue_free (selpad->cached_buffers);
|
|
selpad->cached_buffers = NULL;
|
|
}
|
|
}
|
|
|
|
#if DEBUG_CACHED_BUFFERS
|
|
gst_input_selector_debug_cached_buffers (sel);
|
|
#endif
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
|
|
{
|
|
GstInputSelector *sel;
|
|
GstFlowReturn res;
|
|
GstPad *active_sinkpad;
|
|
GstPad *prev_active_sinkpad;
|
|
GstSelectorPad *selpad;
|
|
GstClockTime start_time;
|
|
|
|
sel = GST_INPUT_SELECTOR (parent);
|
|
selpad = GST_SELECTOR_PAD_CAST (pad);
|
|
|
|
GST_DEBUG_OBJECT (selpad,
|
|
"entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
/* wait or check for flushing */
|
|
if (gst_input_selector_wait (sel, selpad)) {
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
goto flushing;
|
|
}
|
|
|
|
GST_LOG_OBJECT (pad, "getting active pad");
|
|
|
|
prev_active_sinkpad = sel->active_sinkpad;
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
|
|
/* In sync mode wait until the active pad has advanced
|
|
* after the running time of the current buffer */
|
|
if (sel->sync_streams) {
|
|
/* call chain for each cached buffer if we are not the active pad
|
|
* or if we are the active pad but didn't push anything yet. */
|
|
if (active_sinkpad != pad || !selpad->pushed) {
|
|
/* no need to check for sel->cache_buffers as selpad->cached_buffers
|
|
* will only be valid if cache_buffers is TRUE */
|
|
if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
|
|
GstSelectorPadCachedBuffer *cached_buffer;
|
|
GstSegment saved_segment;
|
|
|
|
saved_segment = selpad->segment;
|
|
|
|
selpad->sending_cached_buffers = TRUE;
|
|
while (!sel->flushing && !selpad->flushing &&
|
|
(cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
|
|
GST_DEBUG_OBJECT (pad, "Cached buffers found, "
|
|
"invoking chain for cached buffer %p", cached_buffer->buffer);
|
|
|
|
selpad->segment = cached_buffer->segment;
|
|
selpad->events_pending = TRUE;
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
|
|
/* we may have cleaned up the queue in the meantime because of
|
|
* old buffers */
|
|
if (!selpad->cached_buffers) {
|
|
break;
|
|
}
|
|
}
|
|
selpad->sending_cached_buffers = FALSE;
|
|
|
|
/* all cached buffers sent, restore segment for current buffer */
|
|
selpad->segment = saved_segment;
|
|
selpad->events_pending = TRUE;
|
|
|
|
/* Might have changed while calling chain for cached buffers */
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
}
|
|
}
|
|
|
|
if (active_sinkpad != pad) {
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
if (gst_input_selector_wait_running_time (sel, selpad, buf))
|
|
goto flushing;
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
}
|
|
|
|
/* Might have changed while waiting */
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
}
|
|
|
|
/* update the segment on the srcpad */
|
|
start_time = GST_BUFFER_TIMESTAMP (buf);
|
|
if (GST_CLOCK_TIME_IS_VALID (start_time)) {
|
|
GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (start_time));
|
|
if (GST_BUFFER_DURATION_IS_VALID (buf))
|
|
GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
|
|
|
|
GST_OBJECT_LOCK (pad);
|
|
selpad->position = start_time;
|
|
selpad->segment.position = start_time;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
}
|
|
|
|
/* Ignore buffers from pads except the selected one */
|
|
if (pad != active_sinkpad)
|
|
goto ignore;
|
|
|
|
/* Tell all non-active pads that we advanced the running time */
|
|
if (sel->sync_streams)
|
|
GST_INPUT_SELECTOR_BROADCAST (sel);
|
|
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
|
|
g_object_notify (G_OBJECT (sel), "active-pad");
|
|
}
|
|
|
|
/* if we have a pending events, push them now */
|
|
if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
|
|
|| selpad->events_pending)) {
|
|
gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
|
|
sel);
|
|
selpad->events_pending = FALSE;
|
|
}
|
|
|
|
if (selpad->discont) {
|
|
buf = gst_buffer_make_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_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
|
|
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
|
|
|
|
res = gst_pad_push (sel->srcpad, gst_buffer_ref (buf));
|
|
GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
|
|
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
|
|
if (sel->sync_streams && sel->cache_buffers) {
|
|
/* Might have changed while pushing */
|
|
active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
|
|
/* only set pad to pushed if we are still the active pad */
|
|
if (active_sinkpad == pad)
|
|
selpad->pushed = TRUE;
|
|
|
|
/* cache buffer as we may need it again if we change pads */
|
|
gst_selector_pad_cache_buffer (selpad, buf);
|
|
gst_input_selector_cleanup_old_cached_buffers (sel, pad);
|
|
} else {
|
|
selpad->pushed = TRUE;
|
|
gst_buffer_unref (buf);
|
|
}
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
|
|
done:
|
|
return res;
|
|
|
|
/* dropped buffers */
|
|
ignore:
|
|
{
|
|
gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
|
|
|
|
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 || !active_pad_pushed)
|
|
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_buffer_unref (buf);
|
|
res = GST_FLOW_FLUSHING;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static void gst_input_selector_dispose (GObject * object);
|
|
static void gst_input_selector_finalize (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, const GstCaps * caps);
|
|
static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
|
|
|
|
static GstStateChangeReturn gst_input_selector_change_state (GstElement *
|
|
element, GstStateChange transition);
|
|
|
|
static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query);
|
|
static gint64 gst_input_selector_block (GstInputSelector * self);
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
|
|
"input-selector", 0, "An input stream selector element");
|
|
#define gst_input_selector_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
|
|
_do_init);
|
|
|
|
static void
|
|
gst_input_selector_class_init (GstInputSelectorClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->dispose = gst_input_selector_dispose;
|
|
gobject_class->finalize = gst_input_selector_finalize;
|
|
|
|
gobject_class->set_property = gst_input_selector_set_property;
|
|
gobject_class->get_property = 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_PARAM_STATIC_STRINGS));
|
|
|
|
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_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstInputSelector:sync-streams
|
|
*
|
|
* If set to %TRUE all inactive streams will be synced to the
|
|
* running time of the active stream or to the current clock.
|
|
*
|
|
* To make sure no buffers are dropped by input-selector
|
|
* that might be needed when switching the active pad,
|
|
* sync-mode should be set to "clock" and cache-buffers to TRUE.
|
|
*/
|
|
g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
|
|
g_param_spec_boolean ("sync-streams", "Sync Streams",
|
|
"Synchronize inactive streams to the running time of the active "
|
|
"stream or to the current clock",
|
|
DEFAULT_SYNC_STREAMS,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
|
|
GST_PARAM_MUTABLE_READY));
|
|
|
|
/**
|
|
* GstInputSelector:sync-mode
|
|
*
|
|
* Select how input-selector will sync buffers when in sync-streams mode.
|
|
*
|
|
* Note that when using the "active-segment" mode, the "active-segment" may
|
|
* be ahead of current clock time when switching the active pad, as the current
|
|
* active pad may have pushed more buffers than what was displayed/consumed,
|
|
* which may cause delays and some missing buffers.
|
|
*/
|
|
g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
|
|
g_param_spec_enum ("sync-mode", "Sync mode",
|
|
"Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
|
|
DEFAULT_SYNC_MODE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
|
|
GST_PARAM_MUTABLE_READY));
|
|
|
|
/**
|
|
* GstInputSelector:cache-buffers
|
|
*
|
|
* If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
|
|
* the active pad will cache the buffers still considered valid (after current
|
|
* running time, see sync-mode) to avoid missing frames if/when the pad is
|
|
* reactivated.
|
|
*
|
|
* The active pad may push more buffers than what is currently displayed/consumed
|
|
* and when changing pads those buffers will be discarded and the only way to
|
|
* reactivate that pad without loosing the already consumed buffers is to enable cache.
|
|
*/
|
|
g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
|
|
g_param_spec_boolean ("cache-buffers", "Cache Buffers",
|
|
"Cache buffers for active-pad",
|
|
DEFAULT_CACHE_BUFFERS,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
|
|
GST_PARAM_MUTABLE_READY));
|
|
|
|
/**
|
|
* 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,
|
|
g_cclosure_marshal_generic, G_TYPE_INT64, 0);
|
|
|
|
gst_element_class_set_static_metadata (gstelement_class, "Input selector",
|
|
"Generic", "N-to-1 input stream selector",
|
|
"Julien Moutte <julien@moutte.net>, "
|
|
"Jan Schmidt <thaytan@mad.scientist.com>, "
|
|
"Wim Taymans <wim.taymans@gmail.com>");
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&gst_input_selector_sink_factory));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&gst_input_selector_src_factory));
|
|
|
|
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);
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_init (GstInputSelector * sel)
|
|
{
|
|
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
|
|
gst_pad_set_iterate_internal_links_function (sel->srcpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
|
|
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_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
|
|
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
|
|
/* sinkpad management */
|
|
sel->active_sinkpad = NULL;
|
|
sel->padcount = 0;
|
|
sel->sync_streams = DEFAULT_SYNC_STREAMS;
|
|
|
|
g_mutex_init (&sel->lock);
|
|
g_cond_init (&sel->cond);
|
|
sel->blocked = FALSE;
|
|
|
|
/* lets give a change for downstream to do something on
|
|
* active-pad change before we start pushing new buffers */
|
|
g_signal_connect_data (sel, "notify::active-pad",
|
|
(GCallback) gst_input_selector_active_pad_changed, NULL,
|
|
NULL, G_CONNECT_AFTER);
|
|
}
|
|
|
|
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;
|
|
}
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_input_selector_finalize (GObject * object)
|
|
{
|
|
GstInputSelector *sel = GST_INPUT_SELECTOR (object);
|
|
|
|
g_mutex_clear (&sel->lock);
|
|
g_cond_clear (&sel->cond);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
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 (old)
|
|
old->pushed = FALSE;
|
|
if (new)
|
|
new->pushed = FALSE;
|
|
|
|
/* Send a new SEGMENT event on the new pad next */
|
|
if (old != new && new)
|
|
new->events_pending = TRUE;
|
|
|
|
active_pad_p = &self->active_sinkpad;
|
|
gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
|
|
|
|
if (old && old != new)
|
|
gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
|
|
if (new)
|
|
gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
|
|
|
|
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);
|
|
|
|
#if DEBUG_CACHED_BUFFERS
|
|
gst_input_selector_debug_cached_buffers (sel);
|
|
#endif
|
|
|
|
gst_input_selector_set_active_pad (sel, pad);
|
|
|
|
#if DEBUG_CACHED_BUFFERS
|
|
gst_input_selector_debug_cached_buffers (sel);
|
|
#endif
|
|
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
break;
|
|
}
|
|
case PROP_SYNC_STREAMS:
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
sel->sync_streams = g_value_get_boolean (value);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
break;
|
|
case PROP_SYNC_MODE:
|
|
GST_INPUT_SELECTOR_LOCK (sel);
|
|
sel->sync_mode = g_value_get_enum (value);
|
|
GST_INPUT_SELECTOR_UNLOCK (sel);
|
|
break;
|
|
case PROP_CACHE_BUFFERS:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
sel->cache_buffers = 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_active_pad_changed (GstInputSelector * sel,
|
|
GParamSpec * pspec, gpointer user_data)
|
|
{
|
|
/* Wake up all non-active pads in sync mode, they might be
|
|
* the active pad now */
|
|
if (sel->sync_streams)
|
|
GST_INPUT_SELECTOR_BROADCAST (sel);
|
|
}
|
|
|
|
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_SYNC_STREAMS:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_boolean (value, sel->sync_streams);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
case PROP_SYNC_MODE:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_enum (value, sel->sync_mode);
|
|
GST_INPUT_SELECTOR_UNLOCK (object);
|
|
break;
|
|
case PROP_CACHE_BUFFERS:
|
|
GST_INPUT_SELECTOR_LOCK (object);
|
|
g_value_set_boolean (value, sel->cache_buffers);
|
|
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 (GstInputSelector * sel, GstPad * pad,
|
|
gboolean strict)
|
|
{
|
|
GstPad *otherpad = NULL;
|
|
|
|
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);
|
|
|
|
return otherpad;
|
|
}
|
|
|
|
static gboolean
|
|
gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstInputSelector *sel;
|
|
gboolean result = FALSE;
|
|
GstIterator *iter;
|
|
gboolean done = FALSE;
|
|
GValue item = { 0, };
|
|
GstPad *eventpad;
|
|
GList *pushed_pads = NULL;
|
|
|
|
sel = GST_INPUT_SELECTOR (parent);
|
|
/* Send upstream events to all sinkpads */
|
|
iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
|
|
|
|
/* This is now essentially a copy of gst_pad_event_default_dispatch
|
|
* with a different iterator */
|
|
while (!done) {
|
|
switch (gst_iterator_next (iter, &item)) {
|
|
case GST_ITERATOR_OK:
|
|
eventpad = g_value_get_object (&item);
|
|
|
|
/* if already pushed, skip */
|
|
if (g_list_find (pushed_pads, eventpad)) {
|
|
g_value_reset (&item);
|
|
break;
|
|
}
|
|
|
|
gst_event_ref (event);
|
|
result |= gst_pad_push_event (eventpad, event);
|
|
|
|
g_value_reset (&item);
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
/* We don't reset the result here because we don't push the event
|
|
* again on pads that got the event already and because we need
|
|
* to consider the result of the previous pushes */
|
|
gst_iterator_resync (iter);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
g_value_unset (&item);
|
|
gst_iterator_free (iter);
|
|
|
|
g_list_free (pushed_pads);
|
|
|
|
gst_event_unref (event);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* 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, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean res = FALSE;
|
|
GstInputSelector *sel;
|
|
|
|
sel = GST_INPUT_SELECTOR (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
GList *walk;
|
|
GstClockTime resmin, resmax;
|
|
gboolean reslive;
|
|
|
|
resmin = 0;
|
|
resmax = -1;
|
|
reslive = 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:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/* check if the pad is the active sinkpad */
|
|
static inline gboolean
|
|
gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
|
|
{
|
|
gboolean res;
|
|
|
|
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 (sel->active_sinkpad == NULL) {
|
|
GValue item = G_VALUE_INIT;
|
|
GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
|
|
GstIteratorResult ires;
|
|
|
|
while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
|
|
gst_iterator_resync (iter);
|
|
if (ires == GST_ITERATOR_OK) {
|
|
/* If no pad is currently selected, we return the first usable pad to
|
|
* guarantee consistency */
|
|
|
|
active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
|
|
g_value_reset (&item);
|
|
GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (active_sinkpad));
|
|
} else
|
|
GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
|
|
gst_iterator_free (iter);
|
|
}
|
|
|
|
return active_sinkpad;
|
|
}
|
|
|
|
static GstPad *
|
|
gst_input_selector_request_new_pad (GstElement * element,
|
|
GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
|
|
{
|
|
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_%u", 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_query_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_query));
|
|
gst_pad_set_chain_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
|
|
gst_pad_set_iterate_internal_links_function (sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
|
|
|
|
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
|
|
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
|
|
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 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_unref (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;
|
|
}
|