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* Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sourceforge.net>
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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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* 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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* 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., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1307, USA.
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* SECTION:element-bufferjoin
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* Joins consecutive buffers that have identical timestamps
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* (valid durations will be aggregated).
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#include <gst/base/gstadapter.h>
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#define GST_TYPE_BUFFER_JOIN \
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gst_buffer_join_get_type ()
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#define GST_BUFFER_JOIN(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_BUFFER_JOIN, GstBufferJoin))
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#define GST_BUFFER_JOIN_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_BUFFER_JOIN, GstBufferJoinClass))
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#define GST_IS_BUFFER_JOIN(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_BUFFER_JOIN))
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#define GST_IS_BUFFER_JOIN_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_BUFFER_JOIN))
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typedef struct _GstBufferJoin GstBufferJoin;
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typedef struct _GstBufferJoinClass GstBufferJoinClass;
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GstPad *sinkpad, *srcpad;
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struct _GstBufferJoinClass
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GstElementClass parent_class;
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GST_DEBUG_CATEGORY_STATIC (buffer_join_debug);
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#define GST_CAT_DEFAULT buffer_join_debug
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static GstElementDetails gst_buffer_join_details =
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GST_ELEMENT_DETAILS ("Buffer Join",
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"Joins consecutive buffers with identical timestamps",
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"Mark Nauwelaerts <mnauw@users.sourceforge.net>");
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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#define DEFAULT_PROP_JOIN_NONE FALSE
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#define DEFAULT_PROP_JOIN_FLAGS FALSE
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static void gst_buffer_join_finalize (GObject * object);
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static GstFlowReturn gst_buffer_join_flush (GstBufferJoin * filter,
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static GstCaps *gst_buffer_join_getcaps (GstPad * pad);
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static gboolean gst_buffer_join_setcaps (GstPad * pad, GstCaps * caps);
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static gboolean gst_buffer_join_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn gst_buffer_join_chain (GstPad * pad, GstBuffer * buf);
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static GstStateChangeReturn gst_buffer_join_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_buffer_join_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_buffer_join_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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GST_BOILERPLATE (GstBufferJoin, gst_buffer_join, GstElement, GST_TYPE_ELEMENT);
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gst_buffer_join_base_init (gpointer klass)
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_set_details (element_class, &gst_buffer_join_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_template));
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gst_buffer_join_class_init (GstBufferJoinClass * klass)
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GstElementClass *element_class;
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GObjectClass *gobject_class;
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gobject_class = G_OBJECT_CLASS (klass);
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element_class = GST_ELEMENT_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (buffer_join_debug, "bufferjoin", 0, "Buffer Join");
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_buffer_join_finalize);
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gobject_class->set_property = gst_buffer_join_set_property;
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gobject_class->get_property = gst_buffer_join_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JOIN_NONE,
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g_param_spec_boolean ("join-none", "Join None",
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"Join buffers with invalid time",
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DEFAULT_PROP_JOIN_NONE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_JOIN_FLAGS,
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g_param_spec_boolean ("join-flags", "Join Flags",
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"Join buffers with different flags",
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DEFAULT_PROP_JOIN_NONE, G_PARAM_READWRITE));
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element_class->change_state =
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GST_DEBUG_FUNCPTR (gst_buffer_join_change_state);
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gst_buffer_join_init (GstBufferJoin * filter, GstBufferJoinClass * klass)
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filter->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
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gst_pad_set_setcaps_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_buffer_join_setcaps));
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gst_pad_set_event_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_buffer_join_event));
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gst_pad_set_chain_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_buffer_join_chain));
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gst_pad_set_getcaps_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_buffer_join_getcaps));
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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filter->srcpad = gst_pad_new_from_static_template (&src_template, "src");
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gst_pad_set_getcaps_function (filter->srcpad,
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GST_DEBUG_FUNCPTR (gst_buffer_join_getcaps));
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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filter->buffer = NULL;
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filter->join_none = DEFAULT_PROP_JOIN_NONE;
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filter->join_flags = DEFAULT_PROP_JOIN_FLAGS;
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gst_buffer_join_flush (filter, FALSE);
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gst_buffer_join_finalize (GObject * object)
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GstBufferJoin *filter = GST_BUFFER_JOIN (object);
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gst_buffer_unref (filter->buffer);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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gst_buffer_join_getcaps (GstPad * pad)
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GstBufferJoin *filter;
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filter = GST_BUFFER_JOIN (GST_PAD_PARENT (pad));
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otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
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result = gst_pad_peer_get_caps (otherpad);
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result = gst_caps_new_any ();
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gst_buffer_join_setcaps (GstPad * pad, GstCaps * caps)
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GstBufferJoin *filter = GST_BUFFER_JOIN (GST_PAD_PARENT (pad));
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/* may be a renegotiation; flush previous and accept new caps */
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gst_buffer_join_flush (filter, TRUE);
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return gst_pad_set_caps (filter->srcpad, caps);
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gst_buffer_join_flush (GstBufferJoin * filter, gboolean send)
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GstFlowReturn ret = GST_FLOW_OK;
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if (filter->buffer) {
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ret = gst_pad_push (filter->srcpad, filter->buffer);
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filter->buffer = NULL;
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gst_buffer_unref (filter->buffer);
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filter->buffer = NULL;
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gst_buffer_join_event (GstPad * pad, GstEvent * event)
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GstBufferJoin *filter;
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filter = GST_BUFFER_JOIN (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_STOP:
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gst_buffer_join_flush (filter, FALSE);
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ret = gst_pad_event_default (pad, event);
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gst_object_unref (filter);
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gst_buffer_join_chain (GstPad * pad, GstBuffer * buf)
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GstBufferJoin *filter;
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GstFlowReturn ret = GST_FLOW_OK;
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filter = GST_BUFFER_JOIN (GST_PAD_PARENT (pad));
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time = GST_BUFFER_TIMESTAMP (buf);
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flags = GST_BUFFER_FLAGS (buf);
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if (filter->buffer &&
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((time != GST_BUFFER_TIMESTAMP (filter->buffer)) ||
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(!filter->join_none && time == GST_CLOCK_TIME_NONE &&
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GST_BUFFER_TIMESTAMP (filter->buffer) == GST_CLOCK_TIME_NONE) ||
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(!filter->join_flags && flags != GST_BUFFER_FLAGS (filter->buffer))))
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ret = gst_buffer_join_flush (filter, TRUE);
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if (ret != GST_FLOW_OK)
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if (filter->buffer) {
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GST_DEBUG_OBJECT (filter, "joining buffers at time %" GST_TIME_FORMAT,
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GST_TIME_ARGS (time));
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flags = GST_BUFFER_FLAGS (filter->buffer);
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filter->buffer = gst_buffer_join (filter->buffer, buf);
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GST_BUFFER_FLAGS (filter->buffer) = flags;
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filter->buffer = buf;
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gst_buffer_join_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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GstBufferJoin *filter;
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g_return_if_fail (GST_IS_BUFFER_JOIN (object));
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filter = GST_BUFFER_JOIN (object);
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filter->join_none = g_value_get_boolean (value);
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case PROP_JOIN_FLAGS:
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filter->join_flags = g_value_get_boolean (value);
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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gst_buffer_join_get_property (GObject * object, guint prop_id, GValue * value,
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GstBufferJoin *filter;
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g_return_if_fail (GST_IS_BUFFER_JOIN (object));
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filter = GST_BUFFER_JOIN (object);
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g_value_set_boolean (value, filter->join_none);
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case PROP_JOIN_FLAGS:
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g_value_set_boolean (value, filter->join_flags);
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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static GstStateChangeReturn
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gst_buffer_join_change_state (GstElement * element, GstStateChange transition)
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GstStateChangeReturn ret;
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GstBufferJoin *filter = GST_BUFFER_JOIN (element);
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_buffer_join_flush (filter, FALSE);