mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1069 lines
34 KiB
C
1069 lines
34 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more
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*/
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/**
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* SECTION:gstbasertppayload
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* @short_description: Base class for RTP payloader
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*
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* <refsect2>
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* <para>
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* Provides a base class for RTP payloaders
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* </para>
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* </refsect2>
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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 <gst/rtp/gstrtpbuffer.h>
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#include "gstbasertppayload.h"
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GST_DEBUG_CATEGORY_STATIC (basertppayload_debug);
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#define GST_CAT_DEFAULT (basertppayload_debug)
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#define GST_BASE_RTP_PAYLOAD_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_RTP_PAYLOAD, GstBaseRTPPayloadPrivate))
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struct _GstBaseRTPPayloadPrivate
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{
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gboolean ts_offset_random;
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gboolean seqnum_offset_random;
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gboolean ssrc_random;
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guint16 next_seqnum;
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gboolean perfect_rtptime;
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gint notified_first_timestamp;
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gint64 prop_max_ptime;
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gint64 caps_max_ptime;
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};
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/* BaseRTPPayload signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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/* FIXME 0.11, a better default is the Ethernet MTU of
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* 1500 - sizeof(headers) as pointed out by marcelm in IRC:
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* So an Ethernet MTU of 1500, minus 60 for the max IP, minus 8 for UDP, gives
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* 1432 bytes or so. And that should be adjusted downward further for other
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* encapsulations like PPPoE, so 1400 at most.
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*/
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#define DEFAULT_MTU 1400
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#define DEFAULT_PT 96
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#define DEFAULT_SSRC -1
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#define DEFAULT_TIMESTAMP_OFFSET -1
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#define DEFAULT_SEQNUM_OFFSET -1
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#define DEFAULT_MAX_PTIME -1
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#define DEFAULT_MIN_PTIME 0
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#define DEFAULT_PERFECT_RTPTIME TRUE
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#define DEFAULT_PTIME_MULTIPLE 0
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enum
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{
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PROP_0,
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PROP_MTU,
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PROP_PT,
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PROP_SSRC,
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PROP_TIMESTAMP_OFFSET,
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PROP_SEQNUM_OFFSET,
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PROP_MAX_PTIME,
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PROP_MIN_PTIME,
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PROP_TIMESTAMP,
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PROP_SEQNUM,
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PROP_PERFECT_RTPTIME,
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PROP_PTIME_MULTIPLE,
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PROP_LAST
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};
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static void gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass);
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static void gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass);
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static void gst_basertppayload_init (GstBaseRTPPayload * basertppayload,
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gpointer g_class);
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static void gst_basertppayload_finalize (GObject * object);
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static gboolean gst_basertppayload_sink_setcaps (GstPad * pad, GstCaps * caps);
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static GstCaps *gst_basertppayload_sink_getcaps (GstPad * pad);
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static gboolean gst_basertppayload_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn gst_basertppayload_chain (GstPad * pad,
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GstBuffer * buffer);
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static void gst_basertppayload_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_basertppayload_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_basertppayload_change_state (GstElement *
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element, GstStateChange transition);
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static GstElementClass *parent_class = NULL;
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/* FIXME 0.11: API should be changed to gst_base_typ_payload_xyz */
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GType
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gst_basertppayload_get_type (void)
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{
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static GType basertppayload_type = 0;
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if (!basertppayload_type) {
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static const GTypeInfo basertppayload_info = {
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sizeof (GstBaseRTPPayloadClass),
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(GBaseInitFunc) gst_basertppayload_base_init,
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NULL,
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(GClassInitFunc) gst_basertppayload_class_init,
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NULL,
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NULL,
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sizeof (GstBaseRTPPayload),
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0,
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(GInstanceInitFunc) gst_basertppayload_init,
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};
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basertppayload_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstBaseRTPPayload",
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&basertppayload_info, G_TYPE_FLAG_ABSTRACT);
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}
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return basertppayload_type;
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}
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static void
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gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass)
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{
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}
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static void
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gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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g_type_class_add_private (klass, sizeof (GstBaseRTPPayloadPrivate));
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = gst_basertppayload_finalize;
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gobject_class->set_property = gst_basertppayload_set_property;
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gobject_class->get_property = gst_basertppayload_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
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g_param_spec_uint ("mtu", "MTU",
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"Maximum size of one packet",
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28, G_MAXUINT, DEFAULT_MTU,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PT,
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g_param_spec_uint ("pt", "payload type",
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"The payload type of the packets", 0, 0x80, DEFAULT_PT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
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g_param_spec_uint ("ssrc", "SSRC",
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"The SSRC of the packets (default == random)", 0, G_MAXUINT32,
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DEFAULT_SSRC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_TIMESTAMP_OFFSET, g_param_spec_uint ("timestamp-offset",
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"Timestamp Offset",
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"Offset to add to all outgoing timestamps (default = random)", 0,
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G_MAXUINT32, DEFAULT_TIMESTAMP_OFFSET,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
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g_param_spec_int ("seqnum-offset", "Sequence number Offset",
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"Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXUINT16,
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DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_PTIME,
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g_param_spec_int64 ("max-ptime", "Max packet time",
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"Maximum duration of the packet data in ns (-1 = unlimited up to MTU)",
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-1, G_MAXINT64, DEFAULT_MAX_PTIME,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstBaseRTPAudioPayload:min-ptime:
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*
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* Minimum duration of the packet data in ns (can't go above MTU)
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*
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* Since: 0.10.13
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**/
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MIN_PTIME,
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g_param_spec_int64 ("min-ptime", "Min packet time",
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"Minimum duration of the packet data in ns (can't go above MTU)",
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0, G_MAXINT64, DEFAULT_MIN_PTIME,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMESTAMP,
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g_param_spec_uint ("timestamp", "Timestamp",
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"The RTP timestamp of the last processed packet",
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0, G_MAXUINT32, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
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g_param_spec_uint ("seqnum", "Sequence number",
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"The RTP sequence number of the last processed packet",
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0, G_MAXUINT16, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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/**
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* GstBaseRTPAudioPayload:perfect-rtptime:
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*
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* Try to use the offset fields to generate perfect RTP timestamps. when this
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* option is disabled, RTP timestamps are generated from the GStreamer
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* timestamps, which could result in RTP timestamps that don't increment with
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* the amount of data in the packet.
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*
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* Since: 0.10.25
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*/
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PERFECT_RTPTIME,
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g_param_spec_boolean ("perfect-rtptime", "Perfect RTP Time",
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"Generate perfect RTP timestamps when possible",
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DEFAULT_PERFECT_RTPTIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstBaseRTPAudioPayload:ptime-multiple:
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*
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* Force buffers to be multiples of this duration in ns (0 disables)
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*
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* Since: 0.10.29
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**/
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PTIME_MULTIPLE,
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g_param_spec_int64 ("ptime-multiple", "Packet time multiple",
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"Force buffers to be multiples of this duration in ns (0 disables)",
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0, G_MAXINT64, DEFAULT_PTIME_MULTIPLE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state = gst_basertppayload_change_state;
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GST_DEBUG_CATEGORY_INIT (basertppayload_debug, "basertppayload", 0,
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"Base class for RTP Payloaders");
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}
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static void
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gst_basertppayload_init (GstBaseRTPPayload * basertppayload, gpointer g_class)
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{
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GstPadTemplate *templ;
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GstBaseRTPPayloadPrivate *priv;
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basertppayload->priv = priv =
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GST_BASE_RTP_PAYLOAD_GET_PRIVATE (basertppayload);
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templ =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
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g_return_if_fail (templ != NULL);
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basertppayload->srcpad = gst_pad_new_from_template (templ, "src");
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gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->srcpad);
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templ =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
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g_return_if_fail (templ != NULL);
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basertppayload->sinkpad = gst_pad_new_from_template (templ, "sink");
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gst_pad_set_setcaps_function (basertppayload->sinkpad,
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gst_basertppayload_sink_setcaps);
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gst_pad_set_getcaps_function (basertppayload->sinkpad,
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gst_basertppayload_sink_getcaps);
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gst_pad_set_event_function (basertppayload->sinkpad,
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gst_basertppayload_event);
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gst_pad_set_chain_function (basertppayload->sinkpad,
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gst_basertppayload_chain);
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gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->sinkpad);
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basertppayload->seq_rand = g_rand_new_with_seed (g_random_int ());
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basertppayload->ssrc_rand = g_rand_new_with_seed (g_random_int ());
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basertppayload->ts_rand = g_rand_new_with_seed (g_random_int ());
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basertppayload->mtu = DEFAULT_MTU;
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basertppayload->pt = DEFAULT_PT;
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basertppayload->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
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basertppayload->ssrc = DEFAULT_SSRC;
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basertppayload->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
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priv->seqnum_offset_random = (basertppayload->seqnum_offset == -1);
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priv->ts_offset_random = (basertppayload->ts_offset == -1);
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priv->ssrc_random = (basertppayload->ssrc == -1);
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basertppayload->max_ptime = DEFAULT_MAX_PTIME;
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basertppayload->min_ptime = DEFAULT_MIN_PTIME;
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basertppayload->priv->perfect_rtptime = DEFAULT_PERFECT_RTPTIME;
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basertppayload->abidata.ABI.ptime_multiple = DEFAULT_PTIME_MULTIPLE;
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basertppayload->media = NULL;
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basertppayload->encoding_name = NULL;
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basertppayload->clock_rate = 0;
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basertppayload->priv->caps_max_ptime = DEFAULT_MAX_PTIME;
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basertppayload->priv->prop_max_ptime = DEFAULT_MAX_PTIME;
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}
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static void
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gst_basertppayload_finalize (GObject * object)
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{
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GstBaseRTPPayload *basertppayload;
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basertppayload = GST_BASE_RTP_PAYLOAD (object);
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g_rand_free (basertppayload->seq_rand);
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basertppayload->seq_rand = NULL;
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g_rand_free (basertppayload->ssrc_rand);
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basertppayload->ssrc_rand = NULL;
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g_rand_free (basertppayload->ts_rand);
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basertppayload->ts_rand = NULL;
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g_free (basertppayload->media);
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basertppayload->media = NULL;
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g_free (basertppayload->encoding_name);
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basertppayload->encoding_name = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_basertppayload_sink_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstBaseRTPPayload *basertppayload;
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GstBaseRTPPayloadClass *basertppayload_class;
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gboolean ret = TRUE;
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GST_DEBUG_OBJECT (pad, "setting caps %" GST_PTR_FORMAT, caps);
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basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
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basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
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if (basertppayload_class->set_caps)
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ret = basertppayload_class->set_caps (basertppayload, caps);
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gst_object_unref (basertppayload);
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return ret;
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}
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static GstCaps *
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gst_basertppayload_sink_getcaps (GstPad * pad)
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{
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GstBaseRTPPayload *basertppayload;
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GstBaseRTPPayloadClass *basertppayload_class;
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GstCaps *caps = NULL;
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GST_DEBUG_OBJECT (pad, "getting caps");
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basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
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basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
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if (basertppayload_class->get_caps)
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caps = basertppayload_class->get_caps (basertppayload, pad);
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if (!caps) {
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caps = GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad));
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GST_DEBUG_OBJECT (pad,
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"using pad template %p with caps %p %" GST_PTR_FORMAT,
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GST_PAD_PAD_TEMPLATE (pad), caps, caps);
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caps = gst_caps_ref (caps);
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}
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gst_object_unref (basertppayload);
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return caps;
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}
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static gboolean
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gst_basertppayload_event (GstPad * pad, GstEvent * event)
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{
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GstBaseRTPPayload *basertppayload;
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GstBaseRTPPayloadClass *basertppayload_class;
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gboolean res;
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basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
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if (G_UNLIKELY (basertppayload == NULL)) {
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gst_event_unref (event);
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return FALSE;
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}
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basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
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if (basertppayload_class->handle_event) {
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res = basertppayload_class->handle_event (pad, event);
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if (res)
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goto done;
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}
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_START:
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res = gst_pad_event_default (pad, event);
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break;
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case GST_EVENT_FLUSH_STOP:
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res = gst_pad_event_default (pad, event);
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gst_segment_init (&basertppayload->segment, GST_FORMAT_UNDEFINED);
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break;
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case GST_EVENT_NEWSEGMENT:
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{
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gboolean update;
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gdouble rate, arate;
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GstFormat fmt;
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gint64 start, stop, position;
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GstSegment *segment;
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segment = &basertppayload->segment;
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gst_event_parse_new_segment_full (event, &update, &rate, &arate, &fmt,
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&start, &stop, &position);
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gst_segment_set_newsegment_full (segment, update, rate, arate, fmt, start,
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stop, position);
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GST_DEBUG_OBJECT (basertppayload,
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"configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
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"format %d, "
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"%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
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G_GINT64_FORMAT ", accum %" G_GINT64_FORMAT, update, rate, arate,
|
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segment->format, segment->start, segment->stop, segment->time,
|
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segment->accum);
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/* fallthrough */
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}
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default:
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res = gst_pad_event_default (pad, event);
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break;
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}
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|
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done:
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gst_object_unref (basertppayload);
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|
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return res;
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}
|
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|
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|
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static GstFlowReturn
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gst_basertppayload_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstBaseRTPPayload *basertppayload;
|
|
GstBaseRTPPayloadClass *basertppayload_class;
|
|
GstFlowReturn ret;
|
|
|
|
basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
|
|
basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
|
|
|
|
if (!basertppayload_class->handle_buffer)
|
|
goto no_function;
|
|
|
|
ret = basertppayload_class->handle_buffer (basertppayload, buffer);
|
|
|
|
gst_object_unref (basertppayload);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_function:
|
|
{
|
|
GST_ELEMENT_ERROR (basertppayload, STREAM, NOT_IMPLEMENTED, (NULL),
|
|
("subclass did not implement handle_buffer function"));
|
|
gst_object_unref (basertppayload);
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_basertppayload_set_options:
|
|
* @payload: a #GstBaseRTPPayload
|
|
* @media: the media type (typically "audio" or "video")
|
|
* @dynamic: if the payload type is dynamic
|
|
* @encoding_name: the encoding name
|
|
* @clock_rate: the clock rate of the media
|
|
*
|
|
* Set the rtp options of the payloader. These options will be set in the caps
|
|
* of the payloader. Subclasses must call this method before calling
|
|
* gst_basertppayload_push() or gst_basertppayload_set_outcaps().
|
|
*/
|
|
void
|
|
gst_basertppayload_set_options (GstBaseRTPPayload * payload,
|
|
const gchar * media, gboolean dynamic, const gchar * encoding_name,
|
|
guint32 clock_rate)
|
|
{
|
|
g_return_if_fail (payload != NULL);
|
|
g_return_if_fail (clock_rate != 0);
|
|
|
|
g_free (payload->media);
|
|
payload->media = g_strdup (media);
|
|
payload->dynamic = dynamic;
|
|
g_free (payload->encoding_name);
|
|
payload->encoding_name = g_strdup (encoding_name);
|
|
payload->clock_rate = clock_rate;
|
|
}
|
|
|
|
static gboolean
|
|
copy_fixed (GQuark field_id, const GValue * value, GstStructure * dest)
|
|
{
|
|
if (gst_value_is_fixed (value)) {
|
|
gst_structure_id_set_value (dest, field_id, value);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
update_max_ptime (GstBaseRTPPayload * basertppayload)
|
|
{
|
|
if (basertppayload->priv->caps_max_ptime != -1 &&
|
|
basertppayload->priv->prop_max_ptime != -1)
|
|
basertppayload->max_ptime = MIN (basertppayload->priv->caps_max_ptime,
|
|
basertppayload->priv->prop_max_ptime);
|
|
else if (basertppayload->priv->caps_max_ptime != -1)
|
|
basertppayload->max_ptime = basertppayload->priv->caps_max_ptime;
|
|
else if (basertppayload->priv->prop_max_ptime != -1)
|
|
basertppayload->max_ptime = basertppayload->priv->prop_max_ptime;
|
|
else
|
|
basertppayload->max_ptime = DEFAULT_MAX_PTIME;
|
|
}
|
|
|
|
/**
|
|
* gst_basertppayload_set_outcaps:
|
|
* @payload: a #GstBaseRTPPayload
|
|
* @fieldname: the first field name or %NULL
|
|
* @...: field values
|
|
*
|
|
* Configure the output caps with the optional parameters.
|
|
*
|
|
* Variable arguments should be in the form field name, field type
|
|
* (as a GType), value(s). The last variable argument should be NULL.
|
|
*
|
|
* Returns: %TRUE if the caps could be set.
|
|
*/
|
|
gboolean
|
|
gst_basertppayload_set_outcaps (GstBaseRTPPayload * payload,
|
|
const gchar * fieldname, ...)
|
|
{
|
|
GstCaps *srccaps, *peercaps;
|
|
gboolean res;
|
|
|
|
/* fill in the defaults, their properties cannot be negotiated. */
|
|
srccaps = gst_caps_new_simple ("application/x-rtp",
|
|
"media", G_TYPE_STRING, payload->media,
|
|
"clock-rate", G_TYPE_INT, payload->clock_rate,
|
|
"encoding-name", G_TYPE_STRING, payload->encoding_name, NULL);
|
|
|
|
GST_DEBUG_OBJECT (payload, "defaults: %" GST_PTR_FORMAT, srccaps);
|
|
|
|
if (fieldname) {
|
|
va_list varargs;
|
|
|
|
/* override with custom properties */
|
|
va_start (varargs, fieldname);
|
|
gst_caps_set_simple_valist (srccaps, fieldname, varargs);
|
|
va_end (varargs);
|
|
|
|
GST_DEBUG_OBJECT (payload, "custom added: %" GST_PTR_FORMAT, srccaps);
|
|
}
|
|
|
|
payload->priv->caps_max_ptime = DEFAULT_MAX_PTIME;
|
|
payload->abidata.ABI.ptime = 0;
|
|
|
|
/* the peer caps can override some of the defaults */
|
|
peercaps = gst_pad_peer_get_caps (payload->srcpad);
|
|
if (peercaps == NULL) {
|
|
/* no peer caps, just add the other properties */
|
|
gst_caps_set_simple (srccaps,
|
|
"payload", G_TYPE_INT, GST_BASE_RTP_PAYLOAD_PT (payload),
|
|
"ssrc", G_TYPE_UINT, payload->current_ssrc,
|
|
"clock-base", G_TYPE_UINT, payload->ts_base,
|
|
"seqnum-base", G_TYPE_UINT, payload->seqnum_base, NULL);
|
|
|
|
GST_DEBUG_OBJECT (payload, "no peer caps: %" GST_PTR_FORMAT, srccaps);
|
|
} else {
|
|
GstCaps *temp;
|
|
GstStructure *s, *d;
|
|
const GValue *value;
|
|
gint pt;
|
|
guint max_ptime, ptime;
|
|
|
|
/* peer provides caps we can use to fixate, intersect. This always returns a
|
|
* writable caps. */
|
|
temp = gst_caps_intersect (srccaps, peercaps);
|
|
gst_caps_unref (srccaps);
|
|
gst_caps_unref (peercaps);
|
|
|
|
if (gst_caps_is_empty (temp)) {
|
|
gst_caps_unref (temp);
|
|
return FALSE;
|
|
}
|
|
|
|
/* now fixate, start by taking the first caps */
|
|
gst_caps_truncate (temp);
|
|
|
|
/* get first structure */
|
|
s = gst_caps_get_structure (temp, 0);
|
|
|
|
if (gst_structure_get_uint (s, "maxptime", &max_ptime))
|
|
payload->priv->caps_max_ptime = max_ptime * GST_MSECOND;
|
|
|
|
if (gst_structure_get_uint (s, "ptime", &ptime))
|
|
payload->abidata.ABI.ptime = ptime * GST_MSECOND;
|
|
|
|
if (gst_structure_get_int (s, "payload", &pt)) {
|
|
/* use peer pt */
|
|
GST_BASE_RTP_PAYLOAD_PT (payload) = pt;
|
|
GST_LOG_OBJECT (payload, "using peer pt %d", pt);
|
|
} else {
|
|
if (gst_structure_has_field (s, "payload")) {
|
|
/* can only fixate if there is a field */
|
|
gst_structure_fixate_field_nearest_int (s, "payload",
|
|
GST_BASE_RTP_PAYLOAD_PT (payload));
|
|
gst_structure_get_int (s, "payload", &pt);
|
|
GST_LOG_OBJECT (payload, "using peer pt %d", pt);
|
|
} else {
|
|
/* no pt field, use the internal pt */
|
|
pt = GST_BASE_RTP_PAYLOAD_PT (payload);
|
|
gst_structure_set (s, "payload", G_TYPE_INT, pt, NULL);
|
|
GST_LOG_OBJECT (payload, "using internal pt %d", pt);
|
|
}
|
|
}
|
|
|
|
if (gst_structure_has_field_typed (s, "ssrc", G_TYPE_UINT)) {
|
|
value = gst_structure_get_value (s, "ssrc");
|
|
payload->current_ssrc = g_value_get_uint (value);
|
|
GST_LOG_OBJECT (payload, "using peer ssrc %08x", payload->current_ssrc);
|
|
} else {
|
|
/* FIXME, fixate_nearest_uint would be even better */
|
|
gst_structure_set (s, "ssrc", G_TYPE_UINT, payload->current_ssrc, NULL);
|
|
GST_LOG_OBJECT (payload, "using internal ssrc %08x",
|
|
payload->current_ssrc);
|
|
}
|
|
|
|
if (gst_structure_has_field_typed (s, "clock-base", G_TYPE_UINT)) {
|
|
value = gst_structure_get_value (s, "clock-base");
|
|
payload->ts_base = g_value_get_uint (value);
|
|
GST_LOG_OBJECT (payload, "using peer clock-base %u", payload->ts_base);
|
|
} else {
|
|
/* FIXME, fixate_nearest_uint would be even better */
|
|
gst_structure_set (s, "clock-base", G_TYPE_UINT, payload->ts_base, NULL);
|
|
GST_LOG_OBJECT (payload, "using internal clock-base %u",
|
|
payload->ts_base);
|
|
}
|
|
if (gst_structure_has_field_typed (s, "seqnum-base", G_TYPE_UINT)) {
|
|
value = gst_structure_get_value (s, "seqnum-base");
|
|
payload->seqnum_base = g_value_get_uint (value);
|
|
GST_LOG_OBJECT (payload, "using peer seqnum-base %u",
|
|
payload->seqnum_base);
|
|
} else {
|
|
/* FIXME, fixate_nearest_uint would be even better */
|
|
gst_structure_set (s, "seqnum-base", G_TYPE_UINT, payload->seqnum_base,
|
|
NULL);
|
|
GST_LOG_OBJECT (payload, "using internal seqnum-base %u",
|
|
payload->seqnum_base);
|
|
}
|
|
|
|
/* make the target caps by copying over all the fixed caps, removing the
|
|
* unfixed caps. */
|
|
srccaps = gst_caps_new_simple (gst_structure_get_name (s), NULL);
|
|
d = gst_caps_get_structure (srccaps, 0);
|
|
|
|
gst_structure_foreach (s, (GstStructureForeachFunc) copy_fixed, d);
|
|
|
|
gst_caps_unref (temp);
|
|
|
|
GST_DEBUG_OBJECT (payload, "with peer caps: %" GST_PTR_FORMAT, srccaps);
|
|
}
|
|
|
|
update_max_ptime (payload);
|
|
|
|
res = gst_pad_set_caps (GST_BASE_RTP_PAYLOAD_SRCPAD (payload), srccaps);
|
|
gst_caps_unref (srccaps);
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_basertppayload_is_filled:
|
|
* @payload: a #GstBaseRTPPayload
|
|
* @size: the size of the packet
|
|
* @duration: the duration of the packet
|
|
*
|
|
* Check if the packet with @size and @duration would exceed the configured
|
|
* maximum size.
|
|
*
|
|
* Returns: %TRUE if the packet of @size and @duration would exceed the
|
|
* configured MTU or max_ptime.
|
|
*/
|
|
gboolean
|
|
gst_basertppayload_is_filled (GstBaseRTPPayload * payload,
|
|
guint size, GstClockTime duration)
|
|
{
|
|
if (size > payload->mtu)
|
|
return TRUE;
|
|
|
|
if (payload->max_ptime != -1 && duration >= payload->max_ptime)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
GstBaseRTPPayload *payload;
|
|
guint32 ssrc;
|
|
guint16 seqnum;
|
|
guint8 pt;
|
|
GstCaps *caps;
|
|
GstClockTime timestamp;
|
|
guint64 offset;
|
|
guint32 rtptime;
|
|
} HeaderData;
|
|
|
|
static GstBufferListItem
|
|
find_timestamp (GstBuffer ** buffer, guint group, guint idx, HeaderData * data)
|
|
{
|
|
data->timestamp = GST_BUFFER_TIMESTAMP (*buffer);
|
|
data->offset = GST_BUFFER_OFFSET (*buffer);
|
|
|
|
/* stop when we find a timestamp. We take whatever offset is associated with
|
|
* the timestamp (if any) to do perfect timestamps when we need to. */
|
|
if (data->timestamp != -1)
|
|
return GST_BUFFER_LIST_END;
|
|
else
|
|
return GST_BUFFER_LIST_CONTINUE;
|
|
}
|
|
|
|
static GstBufferListItem
|
|
set_headers (GstBuffer ** buffer, guint group, guint idx, HeaderData * data)
|
|
{
|
|
gst_rtp_buffer_set_ssrc (*buffer, data->ssrc);
|
|
gst_rtp_buffer_set_payload_type (*buffer, data->pt);
|
|
gst_rtp_buffer_set_seq (*buffer, data->seqnum);
|
|
gst_rtp_buffer_set_timestamp (*buffer, data->rtptime);
|
|
gst_buffer_set_caps (*buffer, data->caps);
|
|
/* increment the seqnum for each buffer */
|
|
data->seqnum++;
|
|
|
|
return GST_BUFFER_LIST_SKIP_GROUP;
|
|
}
|
|
|
|
/* Updates the SSRC, payload type, seqnum and timestamp of the RTP buffer
|
|
* before the buffer is pushed. */
|
|
static GstFlowReturn
|
|
gst_basertppayload_prepare_push (GstBaseRTPPayload * payload,
|
|
gpointer obj, gboolean is_list)
|
|
{
|
|
GstBaseRTPPayloadPrivate *priv;
|
|
HeaderData data;
|
|
|
|
if (payload->clock_rate == 0)
|
|
goto no_rate;
|
|
|
|
priv = payload->priv;
|
|
|
|
/* update first, so that the property is set to the last
|
|
* seqnum pushed */
|
|
payload->seqnum = priv->next_seqnum;
|
|
|
|
/* fill in the fields we want to set on all headers */
|
|
data.payload = payload;
|
|
data.seqnum = payload->seqnum;
|
|
data.ssrc = payload->current_ssrc;
|
|
data.pt = payload->pt;
|
|
data.caps = GST_PAD_CAPS (payload->srcpad);
|
|
|
|
/* find the first buffer with a timestamp */
|
|
if (is_list) {
|
|
data.timestamp = -1;
|
|
data.offset = GST_BUFFER_OFFSET_NONE;
|
|
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj),
|
|
(GstBufferListFunc) find_timestamp, &data);
|
|
} else {
|
|
data.timestamp = GST_BUFFER_TIMESTAMP (GST_BUFFER_CAST (obj));
|
|
data.offset = GST_BUFFER_OFFSET (GST_BUFFER_CAST (obj));
|
|
}
|
|
|
|
/* convert to RTP time */
|
|
if (priv->perfect_rtptime && data.offset != GST_BUFFER_OFFSET_NONE) {
|
|
/* if we have an offset, use that for making an RTP timestamp */
|
|
data.rtptime = payload->ts_base + data.offset;
|
|
GST_LOG_OBJECT (payload,
|
|
"Using offset %" G_GUINT64_FORMAT " for RTP timestamp", data.offset);
|
|
} else if (GST_CLOCK_TIME_IS_VALID (data.timestamp)) {
|
|
gint64 rtime;
|
|
|
|
/* no offset, use the gstreamer timestamp */
|
|
rtime = gst_segment_to_running_time (&payload->segment, GST_FORMAT_TIME,
|
|
data.timestamp);
|
|
|
|
if (rtime == -1) {
|
|
GST_LOG_OBJECT (payload, "Clipped timestamp, using base RTP timestamp");
|
|
rtime = 0;
|
|
} else {
|
|
GST_LOG_OBJECT (payload,
|
|
"Using running_time %" GST_TIME_FORMAT " for RTP timestamp",
|
|
GST_TIME_ARGS (rtime));
|
|
rtime =
|
|
gst_util_uint64_scale_int (rtime, payload->clock_rate, GST_SECOND);
|
|
}
|
|
/* add running_time in clock-rate units to the base timestamp */
|
|
data.rtptime = payload->ts_base + rtime;
|
|
} else {
|
|
GST_LOG_OBJECT (payload,
|
|
"Using previous RTP timestamp %" G_GUINT32_FORMAT, payload->timestamp);
|
|
/* no timestamp to convert, take previous timestamp */
|
|
data.rtptime = payload->timestamp;
|
|
}
|
|
|
|
/* set ssrc, payload type, seq number, caps and rtptime */
|
|
if (is_list) {
|
|
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj),
|
|
(GstBufferListFunc) set_headers, &data);
|
|
} else {
|
|
GstBuffer *buf = GST_BUFFER_CAST (obj);
|
|
set_headers (&buf, 0, 0, &data);
|
|
}
|
|
|
|
priv->next_seqnum = data.seqnum;
|
|
payload->timestamp = data.rtptime;
|
|
|
|
GST_LOG_OBJECT (payload,
|
|
"Preparing to push packet with size %d, seq=%d, rtptime=%u, timestamp %"
|
|
GST_TIME_FORMAT, (is_list) ? -1 :
|
|
GST_BUFFER_SIZE (GST_BUFFER (obj)), payload->seqnum, data.rtptime,
|
|
GST_TIME_ARGS (data.timestamp));
|
|
|
|
if (g_atomic_int_compare_and_exchange (&payload->
|
|
priv->notified_first_timestamp, 1, 0)) {
|
|
g_object_notify (G_OBJECT (payload), "timestamp");
|
|
g_object_notify (G_OBJECT (payload), "seqnum");
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
no_rate:
|
|
{
|
|
GST_ELEMENT_ERROR (payload, STREAM, NOT_IMPLEMENTED, (NULL),
|
|
("subclass did not specify clock-rate"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_basertppayload_push_list:
|
|
* @payload: a #GstBaseRTPPayload
|
|
* @list: a #GstBufferList
|
|
*
|
|
* Push @list to the peer element of the payloader. The SSRC, payload type,
|
|
* seqnum and timestamp of the RTP buffer will be updated first.
|
|
*
|
|
* This function takes ownership of @list.
|
|
*
|
|
* Returns: a #GstFlowReturn.
|
|
*
|
|
* Since: 0.10.24
|
|
*/
|
|
GstFlowReturn
|
|
gst_basertppayload_push_list (GstBaseRTPPayload * payload, GstBufferList * list)
|
|
{
|
|
GstFlowReturn res;
|
|
|
|
res = gst_basertppayload_prepare_push (payload, list, TRUE);
|
|
|
|
if (G_LIKELY (res == GST_FLOW_OK))
|
|
res = gst_pad_push_list (payload->srcpad, list);
|
|
else
|
|
gst_buffer_list_unref (list);
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_basertppayload_push:
|
|
* @payload: a #GstBaseRTPPayload
|
|
* @buffer: a #GstBuffer
|
|
*
|
|
* Push @buffer to the peer element of the payloader. The SSRC, payload type,
|
|
* seqnum and timestamp of the RTP buffer will be updated first.
|
|
*
|
|
* This function takes ownership of @buffer.
|
|
*
|
|
* Returns: a #GstFlowReturn.
|
|
*/
|
|
GstFlowReturn
|
|
gst_basertppayload_push (GstBaseRTPPayload * payload, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn res;
|
|
|
|
res = gst_basertppayload_prepare_push (payload, buffer, FALSE);
|
|
|
|
if (G_LIKELY (res == GST_FLOW_OK))
|
|
res = gst_pad_push (payload->srcpad, buffer);
|
|
else
|
|
gst_buffer_unref (buffer);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_basertppayload_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseRTPPayload *basertppayload;
|
|
GstBaseRTPPayloadPrivate *priv;
|
|
gint64 val;
|
|
|
|
basertppayload = GST_BASE_RTP_PAYLOAD (object);
|
|
priv = basertppayload->priv;
|
|
|
|
switch (prop_id) {
|
|
case PROP_MTU:
|
|
basertppayload->mtu = g_value_get_uint (value);
|
|
break;
|
|
case PROP_PT:
|
|
basertppayload->pt = g_value_get_uint (value);
|
|
break;
|
|
case PROP_SSRC:
|
|
val = g_value_get_uint (value);
|
|
basertppayload->ssrc = val;
|
|
priv->ssrc_random = FALSE;
|
|
break;
|
|
case PROP_TIMESTAMP_OFFSET:
|
|
val = g_value_get_uint (value);
|
|
basertppayload->ts_offset = val;
|
|
priv->ts_offset_random = FALSE;
|
|
break;
|
|
case PROP_SEQNUM_OFFSET:
|
|
val = g_value_get_int (value);
|
|
basertppayload->seqnum_offset = val;
|
|
priv->seqnum_offset_random = (val == -1);
|
|
GST_DEBUG_OBJECT (basertppayload, "seqnum offset 0x%04x, random %d",
|
|
basertppayload->seqnum_offset, priv->seqnum_offset_random);
|
|
break;
|
|
case PROP_MAX_PTIME:
|
|
basertppayload->priv->prop_max_ptime = g_value_get_int64 (value);
|
|
update_max_ptime (basertppayload);
|
|
break;
|
|
case PROP_MIN_PTIME:
|
|
basertppayload->min_ptime = g_value_get_int64 (value);
|
|
break;
|
|
case PROP_PERFECT_RTPTIME:
|
|
priv->perfect_rtptime = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_PTIME_MULTIPLE:
|
|
basertppayload->abidata.ABI.ptime_multiple = g_value_get_int64 (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_basertppayload_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseRTPPayload *basertppayload;
|
|
GstBaseRTPPayloadPrivate *priv;
|
|
|
|
basertppayload = GST_BASE_RTP_PAYLOAD (object);
|
|
priv = basertppayload->priv;
|
|
|
|
switch (prop_id) {
|
|
case PROP_MTU:
|
|
g_value_set_uint (value, basertppayload->mtu);
|
|
break;
|
|
case PROP_PT:
|
|
g_value_set_uint (value, basertppayload->pt);
|
|
break;
|
|
case PROP_SSRC:
|
|
if (priv->ssrc_random)
|
|
g_value_set_uint (value, -1);
|
|
else
|
|
g_value_set_uint (value, basertppayload->ssrc);
|
|
break;
|
|
case PROP_TIMESTAMP_OFFSET:
|
|
if (priv->ts_offset_random)
|
|
g_value_set_uint (value, -1);
|
|
else
|
|
g_value_set_uint (value, (guint32) basertppayload->ts_offset);
|
|
break;
|
|
case PROP_SEQNUM_OFFSET:
|
|
if (priv->seqnum_offset_random)
|
|
g_value_set_int (value, -1);
|
|
else
|
|
g_value_set_int (value, (guint16) basertppayload->seqnum_offset);
|
|
break;
|
|
case PROP_MAX_PTIME:
|
|
g_value_set_int64 (value, basertppayload->max_ptime);
|
|
break;
|
|
case PROP_MIN_PTIME:
|
|
g_value_set_int64 (value, basertppayload->min_ptime);
|
|
break;
|
|
case PROP_TIMESTAMP:
|
|
g_value_set_uint (value, basertppayload->timestamp);
|
|
break;
|
|
case PROP_SEQNUM:
|
|
g_value_set_uint (value, basertppayload->seqnum);
|
|
break;
|
|
case PROP_PERFECT_RTPTIME:
|
|
g_value_set_boolean (value, priv->perfect_rtptime);
|
|
break;
|
|
case PROP_PTIME_MULTIPLE:
|
|
g_value_set_int64 (value, basertppayload->abidata.ABI.ptime_multiple);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_basertppayload_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstBaseRTPPayload *basertppayload;
|
|
GstBaseRTPPayloadPrivate *priv;
|
|
GstStateChangeReturn ret;
|
|
|
|
basertppayload = GST_BASE_RTP_PAYLOAD (element);
|
|
priv = basertppayload->priv;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_segment_init (&basertppayload->segment, GST_FORMAT_UNDEFINED);
|
|
|
|
if (priv->seqnum_offset_random)
|
|
basertppayload->seqnum_base = g_random_int_range (0, G_MAXUINT16);
|
|
else
|
|
basertppayload->seqnum_base = basertppayload->seqnum_offset;
|
|
priv->next_seqnum = basertppayload->seqnum_base;
|
|
basertppayload->seqnum = basertppayload->seqnum_base;
|
|
|
|
if (priv->ssrc_random)
|
|
basertppayload->current_ssrc = g_random_int ();
|
|
else
|
|
basertppayload->current_ssrc = basertppayload->ssrc;
|
|
|
|
if (priv->ts_offset_random)
|
|
basertppayload->ts_base = g_random_int ();
|
|
else
|
|
basertppayload->ts_base = basertppayload->ts_offset;
|
|
basertppayload->timestamp = basertppayload->ts_base;
|
|
g_atomic_int_set (&basertppayload->priv->notified_first_timestamp, 1);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
g_atomic_int_set (&basertppayload->priv->notified_first_timestamp, 1);
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|