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1894293d63
SDP's are generated and consumed according to the W3C PeerConnection API available from https://www.w3.org/TR/webrtc/ The SDP is either created initially from the connected sink pads/attached transceivers as in the case of generating an offer or intersected with the connected sink pads/attached transceivers as in the case for creating an answer. In both cases, the rtp payloaded streams sent by the peer are exposed as separate src pads. The implementation supports trickle ICE, RTCP muxing, reduced size RTCP. With contributions from: Nirbheek Chauhan <nirbheek@centricular.com> Mathieu Duponchelle <mathieu@centricular.com> Edward Hervey <edward@centricular.com> https://bugzilla.gnome.org/show_bug.cgi?id=792523
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/* GStreamer
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* Copyright (C) 2017 Matthew Waters <matthew@centricular.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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "utils.h"
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#include "gstwebrtcbin.h"
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GstPadTemplate *
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_find_pad_template (GstElement * element, GstPadDirection direction,
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GstPadPresence presence, const gchar * name)
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{
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GstElementClass *element_class = GST_ELEMENT_GET_CLASS (element);
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const GList *l = gst_element_class_get_pad_template_list (element_class);
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GstPadTemplate *templ = NULL;
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for (; l; l = l->next) {
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templ = l->data;
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if (templ->direction != direction)
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continue;
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if (templ->presence != presence)
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continue;
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if (g_strcmp0 (templ->name_template, name) == 0) {
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return templ;
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}
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}
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return NULL;
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}
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GstSDPMessage *
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_get_latest_sdp (GstWebRTCBin * webrtc)
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{
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if (webrtc->current_local_description &&
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webrtc->current_local_description->type == GST_WEBRTC_SDP_TYPE_ANSWER) {
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return webrtc->current_local_description->sdp;
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}
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if (webrtc->current_remote_description &&
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webrtc->current_remote_description->type == GST_WEBRTC_SDP_TYPE_ANSWER) {
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return webrtc->current_remote_description->sdp;
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}
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if (webrtc->current_local_description &&
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webrtc->current_local_description->type == GST_WEBRTC_SDP_TYPE_OFFER) {
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return webrtc->current_local_description->sdp;
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}
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if (webrtc->current_remote_description &&
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webrtc->current_remote_description->type == GST_WEBRTC_SDP_TYPE_OFFER) {
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return webrtc->current_remote_description->sdp;
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}
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return NULL;
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}
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struct pad_block *
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_create_pad_block (GstElement * element, GstPad * pad, gulong block_id,
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gpointer user_data, GDestroyNotify notify)
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{
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struct pad_block *ret = g_new0 (struct pad_block, 1);
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ret->element = gst_object_ref (element);
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ret->pad = gst_object_ref (pad);
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ret->block_id = block_id;
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ret->user_data = user_data;
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ret->notify = notify;
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return ret;
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}
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void
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_free_pad_block (struct pad_block *block)
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{
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if (!block)
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return;
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if (block->block_id)
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gst_pad_remove_probe (block->pad, block->block_id);
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gst_object_unref (block->element);
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gst_object_unref (block->pad);
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if (block->notify)
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block->notify (block->user_data);
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g_free (block);
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}
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gchar *
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_enum_value_to_string (GType type, guint value)
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{
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GEnumClass *enum_class;
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GEnumValue *enum_value;
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gchar *str = NULL;
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enum_class = g_type_class_ref (type);
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enum_value = g_enum_get_value (enum_class, value);
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if (enum_value)
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str = g_strdup (enum_value->value_nick);
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g_type_class_unref (enum_class);
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return str;
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}
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const gchar *
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_g_checksum_to_webrtc_string (GChecksumType type)
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{
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switch (type) {
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case G_CHECKSUM_SHA1:
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return "sha-1";
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case G_CHECKSUM_SHA256:
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return "sha-256";
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#ifdef G_CHECKSUM_SHA384
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case G_CHECKSUM_SHA384:
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return "sha-384";
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#endif
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case G_CHECKSUM_SHA512:
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return "sha-512";
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default:
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g_warning ("unknown GChecksumType!");
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return NULL;
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}
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}
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