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1018 lines
28 KiB
C
1018 lines
28 KiB
C
/* RTP muxer element for GStreamer
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*
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* gstrtpmux.c:
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*
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* Copyright (C) <2007-2010> Nokia Corporation.
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* Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
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* Copyright (C) <2007-2010> Collabora Ltd
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* Contact: Olivier Crete <olivier.crete@collabora.co.uk>
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000,2005 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 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-rtpmux
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* @title: rtpmux
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* @see_also: rtpdtmfmux
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*
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* The rtp muxer takes multiple RTP streams having the same clock-rate and
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* muxes into a single stream with a single SSRC.
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*
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* ## Example pipelines
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* |[
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* gst-launch-1.0 rtpmux name=mux ! udpsink host=127.0.0.1 port=8888 \
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* alsasrc ! alawenc ! rtppcmapay ! \
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* application/x-rtp, payload=8, rate=8000 ! mux.sink_0 \
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* audiotestsrc is-live=1 ! \
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* mulawenc ! rtppcmupay ! \
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* application/x-rtp, payload=0, rate=8000 ! mux.sink_1
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* ]|
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* In this example, an audio stream is captured from ALSA and another is
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* generated, both are encoded into different payload types and muxed together
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* so they can be sent on the same port.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include <string.h>
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#include "gstrtpmux.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_mux_debug);
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#define GST_CAT_DEFAULT gst_rtp_mux_debug
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enum
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{
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PROP_0,
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PROP_TIMESTAMP_OFFSET,
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PROP_SEQNUM_OFFSET,
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PROP_SEQNUM,
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PROP_SSRC
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};
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#define DEFAULT_TIMESTAMP_OFFSET -1
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#define DEFAULT_SEQNUM_OFFSET -1
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#define DEFAULT_SSRC -1
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static GstStaticPadTemplate src_factory = 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 ("application/x-rtp")
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);
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static GstStaticPadTemplate sink_factory = 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 ("application/x-rtp")
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);
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static GstPad *gst_rtp_mux_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
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static void gst_rtp_mux_release_pad (GstElement * element, GstPad * pad);
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static GstFlowReturn gst_rtp_mux_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static GstFlowReturn gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
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GstBufferList * bufferlist);
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static gboolean gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux,
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GstCaps * caps);
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static gboolean gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static GstStateChangeReturn gst_rtp_mux_change_state (GstElement *
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element, GstStateChange transition);
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static void gst_rtp_mux_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rtp_mux_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_rtp_mux_dispose (GObject * object);
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static gboolean gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux,
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GstEvent * event);
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G_DEFINE_TYPE_WITH_CODE (GstRTPMux, gst_rtp_mux, GST_TYPE_ELEMENT,
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GST_DEBUG_CATEGORY_INIT (gst_rtp_mux_debug, "rtpmux", 0, "rtp muxer"));
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GST_ELEMENT_REGISTER_DEFINE (rtpmux, "rtpmux", GST_RANK_NONE, GST_TYPE_RTP_MUX);
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static void
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gst_rtp_mux_class_init (GstRTPMuxClass * 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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gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
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gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
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gst_element_class_set_static_metadata (gstelement_class, "RTP muxer",
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"Codec/Muxer",
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"multiplex N rtp streams into one", "Zeeshan Ali <first.last@nokia.com>");
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gobject_class->get_property = gst_rtp_mux_get_property;
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gobject_class->set_property = gst_rtp_mux_set_property;
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gobject_class->dispose = gst_rtp_mux_dispose;
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klass->src_event = gst_rtp_mux_src_event_real;
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_TIMESTAMP_OFFSET, g_param_spec_int ("timestamp-offset",
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"Timestamp Offset",
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"Offset to add to all outgoing timestamps (-1 = random)", -1,
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G_MAXINT, 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_MAXINT,
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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_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_MAXUINT, 0, G_PARAM_READABLE | 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)",
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0, G_MAXUINT, DEFAULT_SSRC,
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GST_PARAM_MUTABLE_PLAYING | G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_rtp_mux_request_new_pad);
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gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_rtp_mux_release_pad);
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_rtp_mux_change_state);
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gst_type_mark_as_plugin_api (GST_TYPE_RTP_MUX, 0);
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}
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static void
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gst_rtp_mux_dispose (GObject * object)
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{
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GstRTPMux *rtp_mux = GST_RTP_MUX (object);
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GList *item;
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g_clear_object (&rtp_mux->last_pad);
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restart:
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for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
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GstPad *pad = GST_PAD (item->data);
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if (GST_PAD_IS_SINK (pad)) {
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gst_element_release_request_pad (GST_ELEMENT (object), pad);
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goto restart;
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}
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}
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G_OBJECT_CLASS (gst_rtp_mux_parent_class)->dispose (object);
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}
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static gboolean
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gst_rtp_mux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstRTPMux *rtp_mux = GST_RTP_MUX (parent);
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GstRTPMuxClass *klass;
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gboolean ret;
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klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
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ret = klass->src_event (rtp_mux, event);
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return ret;
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}
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static gboolean
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gst_rtp_mux_src_event_real (GstRTPMux * rtp_mux, GstEvent * event)
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{
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CUSTOM_UPSTREAM:
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{
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const GstStructure *s = gst_event_get_structure (event);
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if (gst_structure_has_name (s, "GstRTPCollision")) {
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guint ssrc = 0;
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if (!gst_structure_get_uint (s, "ssrc", &ssrc))
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ssrc = -1;
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GST_DEBUG_OBJECT (rtp_mux, "collided ssrc: %x", ssrc);
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/* choose another ssrc for our stream */
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GST_OBJECT_LOCK (rtp_mux);
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if (ssrc == rtp_mux->current_ssrc) {
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GstCaps *caps;
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guint suggested_ssrc = 0;
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guint32 new_ssrc;
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if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
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rtp_mux->current_ssrc = suggested_ssrc;
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while (ssrc == rtp_mux->current_ssrc)
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rtp_mux->current_ssrc = g_random_int ();
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new_ssrc = rtp_mux->current_ssrc;
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GST_INFO_OBJECT (rtp_mux, "New ssrc after collision %x (was: %x)",
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new_ssrc, ssrc);
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GST_OBJECT_UNLOCK (rtp_mux);
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caps = gst_pad_get_current_caps (rtp_mux->srcpad);
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caps = gst_caps_make_writable (caps);
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gst_caps_set_simple (caps, "ssrc", G_TYPE_UINT, new_ssrc, NULL);
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gst_pad_set_caps (rtp_mux->srcpad, caps);
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gst_caps_unref (caps);
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} else {
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GST_OBJECT_UNLOCK (rtp_mux);
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}
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}
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break;
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}
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default:
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break;
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}
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return gst_pad_event_default (rtp_mux->srcpad, GST_OBJECT (rtp_mux), event);
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}
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static void
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gst_rtp_mux_init (GstRTPMux * rtp_mux)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtp_mux);
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rtp_mux->srcpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"src"), "src");
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gst_pad_set_event_function (rtp_mux->srcpad,
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GST_DEBUG_FUNCPTR (gst_rtp_mux_src_event));
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gst_pad_use_fixed_caps (rtp_mux->srcpad);
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gst_element_add_pad (GST_ELEMENT (rtp_mux), rtp_mux->srcpad);
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rtp_mux->ssrc = DEFAULT_SSRC;
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rtp_mux->current_ssrc = DEFAULT_SSRC;
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rtp_mux->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
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rtp_mux->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
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rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
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}
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static void
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gst_rtp_mux_setup_sinkpad (GstRTPMux * rtp_mux, GstPad * sinkpad)
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{
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GstRTPMuxPadPrivate *padpriv = g_new0 (GstRTPMuxPadPrivate, 1);
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/* setup some pad functions */
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gst_pad_set_chain_function (sinkpad, GST_DEBUG_FUNCPTR (gst_rtp_mux_chain));
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gst_pad_set_chain_list_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_rtp_mux_chain_list));
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gst_pad_set_event_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_event));
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gst_pad_set_query_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_rtp_mux_sink_query));
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gst_segment_init (&padpriv->segment, GST_FORMAT_UNDEFINED);
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gst_pad_set_element_private (sinkpad, padpriv);
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gst_pad_set_active (sinkpad, TRUE);
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gst_element_add_pad (GST_ELEMENT (rtp_mux), sinkpad);
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}
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static GstPad *
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gst_rtp_mux_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
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{
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GstRTPMux *rtp_mux;
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GstPad *newpad;
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g_return_val_if_fail (templ != NULL, NULL);
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g_return_val_if_fail (GST_IS_RTP_MUX (element), NULL);
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rtp_mux = GST_RTP_MUX (element);
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if (templ->direction != GST_PAD_SINK) {
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GST_WARNING_OBJECT (rtp_mux, "request pad that is not a SINK pad");
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return NULL;
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}
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newpad = gst_pad_new_from_template (templ, req_name);
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if (newpad)
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gst_rtp_mux_setup_sinkpad (rtp_mux, newpad);
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else
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GST_WARNING_OBJECT (rtp_mux, "failed to create request pad");
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return newpad;
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}
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static void
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gst_rtp_mux_release_pad (GstElement * element, GstPad * pad)
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{
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GstRTPMuxPadPrivate *padpriv;
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GST_OBJECT_LOCK (element);
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padpriv = gst_pad_get_element_private (pad);
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gst_pad_set_element_private (pad, NULL);
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GST_OBJECT_UNLOCK (element);
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gst_element_remove_pad (element, pad);
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if (padpriv) {
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g_free (padpriv);
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}
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}
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/* Put our own timestamp-offset on the buffer */
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static void
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gst_rtp_mux_readjust_rtp_timestamp_locked (GstRTPMux * rtp_mux,
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GstRTPMuxPadPrivate * padpriv, GstRTPBuffer * rtpbuffer)
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{
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guint32 ts;
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guint32 sink_ts_base = 0;
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if (padpriv && padpriv->have_timestamp_offset)
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sink_ts_base = padpriv->timestamp_offset;
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ts = gst_rtp_buffer_get_timestamp (rtpbuffer) - sink_ts_base +
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rtp_mux->ts_base;
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GST_LOG_OBJECT (rtp_mux, "Re-adjusting RTP ts %u to %u",
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gst_rtp_buffer_get_timestamp (rtpbuffer), ts);
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gst_rtp_buffer_set_timestamp (rtpbuffer, ts);
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}
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static gboolean
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process_buffer_locked (GstRTPMux * rtp_mux, GstRTPMuxPadPrivate * padpriv,
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GstRTPBuffer * rtpbuffer)
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{
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GstRTPMuxClass *klass = GST_RTP_MUX_GET_CLASS (rtp_mux);
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if (klass->accept_buffer_locked)
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if (!klass->accept_buffer_locked (rtp_mux, padpriv, rtpbuffer))
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return FALSE;
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rtp_mux->seqnum++;
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gst_rtp_buffer_set_seq (rtpbuffer, rtp_mux->seqnum);
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gst_rtp_buffer_set_ssrc (rtpbuffer, rtp_mux->current_ssrc);
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gst_rtp_mux_readjust_rtp_timestamp_locked (rtp_mux, padpriv, rtpbuffer);
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GST_LOG_OBJECT (rtp_mux,
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"Pushing packet size %" G_GSIZE_FORMAT ", seq=%d, ts=%u, ssrc=%x",
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rtpbuffer->map[0].size, rtp_mux->seqnum,
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gst_rtp_buffer_get_timestamp (rtpbuffer), rtp_mux->current_ssrc);
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if (padpriv) {
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if (padpriv->segment.format == GST_FORMAT_TIME) {
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GST_BUFFER_PTS (rtpbuffer->buffer) =
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gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
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GST_BUFFER_PTS (rtpbuffer->buffer));
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GST_BUFFER_DTS (rtpbuffer->buffer) =
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gst_segment_to_running_time (&padpriv->segment, GST_FORMAT_TIME,
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GST_BUFFER_DTS (rtpbuffer->buffer));
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}
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}
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return TRUE;
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}
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struct BufferListData
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{
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GstRTPMux *rtp_mux;
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GstRTPMuxPadPrivate *padpriv;
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gboolean drop;
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};
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static gboolean
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process_list_item (GstBuffer ** buffer, guint idx, gpointer user_data)
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{
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struct BufferListData *bd = user_data;
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GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
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*buffer = gst_buffer_make_writable (*buffer);
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gst_rtp_buffer_map (*buffer, GST_MAP_READWRITE, &rtpbuffer);
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bd->drop = !process_buffer_locked (bd->rtp_mux, bd->padpriv, &rtpbuffer);
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gst_rtp_buffer_unmap (&rtpbuffer);
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if (bd->drop)
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return FALSE;
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if (GST_BUFFER_DURATION_IS_VALID (*buffer) &&
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GST_BUFFER_PTS_IS_VALID (*buffer))
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bd->rtp_mux->last_stop = GST_BUFFER_PTS (*buffer) +
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GST_BUFFER_DURATION (*buffer);
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else
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bd->rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
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return TRUE;
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}
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static gboolean resend_events (GstPad * pad, GstEvent ** event,
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gpointer user_data);
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static GstFlowReturn
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gst_rtp_mux_chain_list (GstPad * pad, GstObject * parent,
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GstBufferList * bufferlist)
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{
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GstRTPMux *rtp_mux;
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GstFlowReturn ret;
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GstRTPMuxPadPrivate *padpriv;
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gboolean changed = FALSE;
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struct BufferListData bd;
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rtp_mux = GST_RTP_MUX (parent);
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|
|
if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
|
|
GstCaps *current_caps = gst_pad_get_current_caps (pad);
|
|
|
|
if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
|
|
gst_pad_mark_reconfigure (rtp_mux->srcpad);
|
|
if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
|
|
ret = GST_FLOW_FLUSHING;
|
|
else
|
|
ret = GST_FLOW_NOT_NEGOTIATED;
|
|
gst_buffer_list_unref (bufferlist);
|
|
goto out;
|
|
}
|
|
gst_caps_unref (current_caps);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
|
|
padpriv = gst_pad_get_element_private (pad);
|
|
if (!padpriv) {
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
ret = GST_FLOW_NOT_LINKED;
|
|
gst_buffer_list_unref (bufferlist);
|
|
goto out;
|
|
}
|
|
|
|
bd.rtp_mux = rtp_mux;
|
|
bd.padpriv = padpriv;
|
|
bd.drop = FALSE;
|
|
|
|
bufferlist = gst_buffer_list_make_writable (bufferlist);
|
|
gst_buffer_list_foreach (bufferlist, process_list_item, &bd);
|
|
|
|
if (!bd.drop && pad != rtp_mux->last_pad) {
|
|
changed = TRUE;
|
|
g_clear_object (&rtp_mux->last_pad);
|
|
rtp_mux->last_pad = g_object_ref (pad);
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
|
|
if (changed)
|
|
gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
|
|
|
|
if (bd.drop) {
|
|
gst_buffer_list_unref (bufferlist);
|
|
ret = GST_FLOW_OK;
|
|
} else {
|
|
ret = gst_pad_push_list (rtp_mux->srcpad, bufferlist);
|
|
}
|
|
|
|
out:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
resend_events (GstPad * pad, GstEvent ** event, gpointer user_data)
|
|
{
|
|
GstRTPMux *rtp_mux = user_data;
|
|
|
|
if (GST_EVENT_TYPE (*event) == GST_EVENT_CAPS) {
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (*event, &caps);
|
|
gst_rtp_mux_setcaps (pad, rtp_mux, caps);
|
|
} else if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
|
|
GstSegment new_segment;
|
|
gst_segment_init (&new_segment, GST_FORMAT_TIME);
|
|
gst_pad_push_event (rtp_mux->srcpad, gst_event_new_segment (&new_segment));
|
|
} else {
|
|
gst_pad_push_event (rtp_mux->srcpad, gst_event_ref (*event));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_mux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
|
|
{
|
|
GstRTPMux *rtp_mux;
|
|
GstFlowReturn ret;
|
|
GstRTPMuxPadPrivate *padpriv;
|
|
gboolean drop;
|
|
gboolean changed = FALSE;
|
|
GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
|
|
|
|
rtp_mux = GST_RTP_MUX (parent);
|
|
|
|
if (gst_pad_check_reconfigure (rtp_mux->srcpad)) {
|
|
GstCaps *current_caps = gst_pad_get_current_caps (pad);
|
|
|
|
if (!gst_rtp_mux_setcaps (pad, rtp_mux, current_caps)) {
|
|
gst_pad_mark_reconfigure (rtp_mux->srcpad);
|
|
if (GST_PAD_IS_FLUSHING (rtp_mux->srcpad))
|
|
ret = GST_FLOW_FLUSHING;
|
|
else
|
|
ret = GST_FLOW_NOT_NEGOTIATED;
|
|
gst_buffer_unref (buffer);
|
|
goto out;
|
|
}
|
|
gst_caps_unref (current_caps);
|
|
}
|
|
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
padpriv = gst_pad_get_element_private (pad);
|
|
|
|
if (!padpriv) {
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
gst_buffer_unref (buffer);
|
|
return GST_FLOW_NOT_LINKED;
|
|
}
|
|
|
|
buffer = gst_buffer_make_writable (buffer);
|
|
|
|
if (!gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtpbuffer)) {
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
gst_buffer_unref (buffer);
|
|
GST_ERROR_OBJECT (rtp_mux, "Invalid RTP buffer");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
drop = !process_buffer_locked (rtp_mux, padpriv, &rtpbuffer);
|
|
|
|
gst_rtp_buffer_unmap (&rtpbuffer);
|
|
|
|
if (!drop) {
|
|
if (pad != rtp_mux->last_pad) {
|
|
changed = TRUE;
|
|
g_clear_object (&rtp_mux->last_pad);
|
|
rtp_mux->last_pad = g_object_ref (pad);
|
|
}
|
|
|
|
if (GST_BUFFER_DURATION_IS_VALID (buffer) &&
|
|
GST_BUFFER_PTS_IS_VALID (buffer))
|
|
rtp_mux->last_stop = GST_BUFFER_PTS (buffer) +
|
|
GST_BUFFER_DURATION (buffer);
|
|
else
|
|
rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
|
|
if (changed)
|
|
gst_pad_sticky_events_foreach (pad, resend_events, rtp_mux);
|
|
|
|
if (drop) {
|
|
gst_buffer_unref (buffer);
|
|
ret = GST_FLOW_OK;
|
|
} else {
|
|
ret = gst_pad_push (rtp_mux->srcpad, buffer);
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_mux_setcaps (GstPad * pad, GstRTPMux * rtp_mux, GstCaps * caps)
|
|
{
|
|
GstStructure *structure;
|
|
gboolean ret = FALSE;
|
|
GstRTPMuxPadPrivate *padpriv;
|
|
GstCaps *peercaps;
|
|
|
|
if (caps == NULL)
|
|
return FALSE;
|
|
|
|
if (!gst_caps_is_fixed (caps))
|
|
return FALSE;
|
|
|
|
peercaps = gst_pad_peer_query_caps (rtp_mux->srcpad, NULL);
|
|
if (peercaps) {
|
|
GstCaps *tcaps, *othercaps;;
|
|
tcaps = gst_pad_get_pad_template_caps (pad);
|
|
othercaps = gst_caps_intersect_full (peercaps, tcaps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
|
|
if (gst_caps_get_size (othercaps) > 0) {
|
|
structure = gst_caps_get_structure (othercaps, 0);
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
if (gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
|
|
GST_INFO_OBJECT (pad, "Use downstream ssrc: %x", rtp_mux->current_ssrc);
|
|
rtp_mux->have_ssrc = TRUE;
|
|
}
|
|
if (gst_structure_get_uint (structure,
|
|
"timestamp-offset", &rtp_mux->ts_base)) {
|
|
GST_INFO_OBJECT (pad, "Use downstream timestamp-offset: %u",
|
|
rtp_mux->ts_base);
|
|
}
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
}
|
|
|
|
gst_caps_unref (othercaps);
|
|
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (tcaps);
|
|
}
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
if (!structure)
|
|
return FALSE;
|
|
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
padpriv = gst_pad_get_element_private (pad);
|
|
if (padpriv &&
|
|
gst_structure_get_uint (structure, "timestamp-offset",
|
|
&padpriv->timestamp_offset)) {
|
|
padpriv->have_timestamp_offset = TRUE;
|
|
}
|
|
|
|
caps = gst_caps_copy (caps);
|
|
|
|
/* if we don't have a specified ssrc, first try to take one from the caps,
|
|
and if that fails, generate one */
|
|
if (rtp_mux->ssrc == DEFAULT_SSRC) {
|
|
if (rtp_mux->current_ssrc == DEFAULT_SSRC) {
|
|
if (!gst_structure_get_uint (structure, "ssrc", &rtp_mux->current_ssrc)) {
|
|
rtp_mux->current_ssrc = g_random_int ();
|
|
GST_INFO_OBJECT (rtp_mux, "Set random ssrc %x", rtp_mux->current_ssrc);
|
|
}
|
|
}
|
|
} else {
|
|
rtp_mux->current_ssrc = rtp_mux->ssrc;
|
|
GST_INFO_OBJECT (rtp_mux, "Set ssrc %x", rtp_mux->current_ssrc);
|
|
}
|
|
|
|
gst_caps_set_simple (caps,
|
|
"timestamp-offset", G_TYPE_UINT, rtp_mux->ts_base,
|
|
"seqnum-offset", G_TYPE_UINT, rtp_mux->seqnum_base,
|
|
"ssrc", G_TYPE_UINT, rtp_mux->current_ssrc, NULL);
|
|
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
|
|
if (rtp_mux->send_stream_start) {
|
|
gchar s_id[32];
|
|
|
|
/* stream-start (FIXME: create id based on input ids) */
|
|
g_snprintf (s_id, sizeof (s_id), "interleave-%08x", g_random_int ());
|
|
gst_pad_push_event (rtp_mux->srcpad, gst_event_new_stream_start (s_id));
|
|
|
|
rtp_mux->send_stream_start = FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (rtp_mux,
|
|
"setting caps %" GST_PTR_FORMAT " on src pad..", caps);
|
|
ret = gst_pad_set_caps (rtp_mux->srcpad, caps);
|
|
|
|
|
|
gst_caps_unref (caps);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
clear_caps (GstCaps * caps, gboolean only_clock_rate)
|
|
{
|
|
gint i, j;
|
|
|
|
/* Lets only match on the clock-rate */
|
|
for (i = 0; i < gst_caps_get_size (caps); i++) {
|
|
GstStructure *s = gst_caps_get_structure (caps, i);
|
|
|
|
for (j = 0; j < gst_structure_n_fields (s); j++) {
|
|
const gchar *name = gst_structure_nth_field_name (s, j);
|
|
|
|
if (strcmp (name, "clock-rate") && (only_clock_rate ||
|
|
(strcmp (name, "ssrc")))) {
|
|
gst_structure_remove_field (s, name);
|
|
j--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
same_clock_rate_fold (const GValue * item, GValue * ret, gpointer user_data)
|
|
{
|
|
GstPad *mypad = user_data;
|
|
GstPad *pad = g_value_get_object (item);
|
|
GstCaps *peercaps;
|
|
GstCaps *accumcaps;
|
|
|
|
if (pad == mypad)
|
|
return TRUE;
|
|
|
|
accumcaps = g_value_get_boxed (ret);
|
|
peercaps = gst_pad_peer_query_caps (pad, accumcaps);
|
|
if (!peercaps) {
|
|
g_warning ("no peercaps");
|
|
return TRUE;
|
|
}
|
|
peercaps = gst_caps_make_writable (peercaps);
|
|
clear_caps (peercaps, TRUE);
|
|
|
|
g_value_take_boxed (ret, peercaps);
|
|
|
|
return !gst_caps_is_empty (peercaps);
|
|
}
|
|
|
|
static GstCaps *
|
|
gst_rtp_mux_getcaps (GstPad * pad, GstRTPMux * mux, GstCaps * filter)
|
|
{
|
|
GstCaps *caps = NULL;
|
|
GstIterator *iter = NULL;
|
|
GValue v = { 0 };
|
|
GstIteratorResult res;
|
|
GstCaps *peercaps;
|
|
GstCaps *othercaps;
|
|
GstCaps *tcaps;
|
|
const GstStructure *structure;
|
|
|
|
peercaps = gst_pad_peer_query_caps (mux->srcpad, NULL);
|
|
|
|
if (peercaps) {
|
|
tcaps = gst_pad_get_pad_template_caps (pad);
|
|
othercaps = gst_caps_intersect_full (peercaps, tcaps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (peercaps);
|
|
} else {
|
|
tcaps = gst_pad_get_pad_template_caps (mux->srcpad);
|
|
if (filter)
|
|
othercaps = gst_caps_intersect_full (filter, tcaps,
|
|
GST_CAPS_INTERSECT_FIRST);
|
|
else
|
|
othercaps = gst_caps_copy (tcaps);
|
|
}
|
|
gst_caps_unref (tcaps);
|
|
|
|
GST_LOG_OBJECT (pad, "Intersected srcpad-peercaps and template caps: %"
|
|
GST_PTR_FORMAT, othercaps);
|
|
|
|
structure = gst_caps_get_structure (othercaps, 0);
|
|
if (mux->ssrc == DEFAULT_SSRC) {
|
|
if (gst_structure_get_uint (structure, "ssrc", &mux->current_ssrc))
|
|
GST_DEBUG_OBJECT (pad, "Use downstream ssrc: %x", mux->current_ssrc);
|
|
}
|
|
|
|
clear_caps (othercaps, TRUE);
|
|
|
|
g_value_init (&v, GST_TYPE_CAPS);
|
|
|
|
iter = gst_element_iterate_sink_pads (GST_ELEMENT (mux));
|
|
do {
|
|
gst_value_set_caps (&v, othercaps);
|
|
res = gst_iterator_fold (iter, same_clock_rate_fold, &v, pad);
|
|
gst_iterator_resync (iter);
|
|
} while (res == GST_ITERATOR_RESYNC);
|
|
gst_iterator_free (iter);
|
|
|
|
caps = gst_caps_intersect ((GstCaps *) gst_value_get_caps (&v), othercaps);
|
|
|
|
g_value_unset (&v);
|
|
gst_caps_unref (othercaps);
|
|
|
|
if (res == GST_ITERATOR_ERROR) {
|
|
gst_caps_unref (caps);
|
|
caps = gst_caps_new_empty ();
|
|
}
|
|
|
|
|
|
return caps;
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_mux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstRTPMux *mux = GST_RTP_MUX (parent);
|
|
gboolean res = FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:
|
|
{
|
|
GstCaps *filter, *caps;
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
GST_LOG_OBJECT (pad, "Received caps-query with filter-caps: %"
|
|
GST_PTR_FORMAT, filter);
|
|
caps = gst_rtp_mux_getcaps (pad, mux, filter);
|
|
gst_query_set_caps_result (query, caps);
|
|
GST_LOG_OBJECT (mux, "Answering caps-query with caps: %"
|
|
GST_PTR_FORMAT, caps);
|
|
gst_caps_unref (caps);
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
default:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mux_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstRTPMux *rtp_mux;
|
|
|
|
rtp_mux = GST_RTP_MUX (object);
|
|
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
switch (prop_id) {
|
|
case PROP_TIMESTAMP_OFFSET:
|
|
g_value_set_int (value, rtp_mux->ts_offset);
|
|
break;
|
|
case PROP_SEQNUM_OFFSET:
|
|
g_value_set_int (value, rtp_mux->seqnum_offset);
|
|
break;
|
|
case PROP_SEQNUM:
|
|
g_value_set_uint (value, rtp_mux->seqnum);
|
|
break;
|
|
case PROP_SSRC:
|
|
g_value_set_uint (value, rtp_mux->ssrc);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mux_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstRTPMux *rtp_mux;
|
|
|
|
rtp_mux = GST_RTP_MUX (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_TIMESTAMP_OFFSET:
|
|
rtp_mux->ts_offset = g_value_get_int (value);
|
|
break;
|
|
case PROP_SEQNUM_OFFSET:
|
|
rtp_mux->seqnum_offset = g_value_get_int (value);
|
|
break;
|
|
case PROP_SSRC:
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
rtp_mux->ssrc = g_value_get_uint (value);
|
|
rtp_mux->current_ssrc = rtp_mux->ssrc;
|
|
rtp_mux->have_ssrc = TRUE;
|
|
GST_DEBUG_OBJECT (rtp_mux, "ssrc prop set to %x", rtp_mux->ssrc);
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_mux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstRTPMux *mux = GST_RTP_MUX (parent);
|
|
gboolean is_pad;
|
|
gboolean ret;
|
|
|
|
GST_OBJECT_LOCK (mux);
|
|
is_pad = (pad == mux->last_pad);
|
|
GST_OBJECT_UNLOCK (mux);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps;
|
|
|
|
gst_event_parse_caps (event, &caps);
|
|
GST_LOG_OBJECT (pad, "Received caps-event with caps: %"
|
|
GST_PTR_FORMAT, caps);
|
|
ret = gst_rtp_mux_setcaps (pad, mux, caps);
|
|
gst_event_unref (event);
|
|
return ret;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
{
|
|
GST_OBJECT_LOCK (mux);
|
|
mux->last_stop = GST_CLOCK_TIME_NONE;
|
|
GST_OBJECT_UNLOCK (mux);
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
GstRTPMuxPadPrivate *padpriv;
|
|
|
|
GST_OBJECT_LOCK (mux);
|
|
padpriv = gst_pad_get_element_private (pad);
|
|
|
|
if (padpriv) {
|
|
gst_event_copy_segment (event, &padpriv->segment);
|
|
}
|
|
GST_OBJECT_UNLOCK (mux);
|
|
|
|
if (is_pad) {
|
|
GstSegment new_segment;
|
|
gst_segment_init (&new_segment, GST_FORMAT_TIME);
|
|
gst_event_unref (event);
|
|
event = gst_event_new_segment (&new_segment);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (is_pad) {
|
|
return gst_pad_push_event (mux->srcpad, event);
|
|
} else {
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mux_ready_to_paused (GstRTPMux * rtp_mux)
|
|
{
|
|
|
|
GST_OBJECT_LOCK (rtp_mux);
|
|
|
|
g_clear_object (&rtp_mux->last_pad);
|
|
rtp_mux->send_stream_start = TRUE;
|
|
|
|
if (rtp_mux->seqnum_offset == -1)
|
|
rtp_mux->seqnum_base = g_random_int_range (0, G_MAXUINT16);
|
|
else
|
|
rtp_mux->seqnum_base = rtp_mux->seqnum_offset;
|
|
rtp_mux->seqnum = rtp_mux->seqnum_base;
|
|
|
|
if (rtp_mux->ts_offset == -1)
|
|
rtp_mux->ts_base = g_random_int ();
|
|
else
|
|
rtp_mux->ts_base = rtp_mux->ts_offset;
|
|
|
|
rtp_mux->last_stop = GST_CLOCK_TIME_NONE;
|
|
|
|
if (rtp_mux->have_ssrc)
|
|
rtp_mux->current_ssrc = rtp_mux->ssrc;
|
|
|
|
GST_DEBUG_OBJECT (rtp_mux, "set timestamp-offset to %u", rtp_mux->ts_base);
|
|
|
|
GST_OBJECT_UNLOCK (rtp_mux);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_rtp_mux_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstRTPMux *rtp_mux;
|
|
GstStateChangeReturn ret;
|
|
|
|
rtp_mux = GST_RTP_MUX (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_rtp_mux_ready_to_paused (rtp_mux);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (gst_rtp_mux_parent_class)->change_state (element,
|
|
transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
g_clear_object (&rtp_mux->last_pad);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|