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108 lines
3.2 KiB
108 lines
3.2 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2017, Digium, Inc.
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*
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* Mark Michelson <mmichelson@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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#include "asterisk.h"
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#include "asterisk/sdp_state.h"
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#include "asterisk/sdp_options.h"
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#include "asterisk/sdp_translator.h"
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#include "asterisk/sdp_priv.h"
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#include "asterisk/vector.h"
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#include "asterisk/utils.h"
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#include "asterisk/stream.h"
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struct ast_sdp_state {
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/*! Local capabilities, learned through configuration */
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struct ast_stream_topology *local_capabilities;
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/*! Remote capabilities, learned through remote SDP */
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struct ast_stream_topology *remote_capabilities;
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/*! Joint capabilities. The combined local and remote capabilities. */
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struct ast_stream_topology *joint_capabilities;
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/*! Local SDP. Generated via the options and local capabilities. */
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struct ast_sdp *local_sdp;
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/*! Remote SDP. Received directly from a peer. */
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struct ast_sdp *remote_sdp;
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/*! Joint SDP. The merged local and remote SDPs. */
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struct ast_sdp *joint_sdp;
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/*! SDP options. Configured options beyond media capabilities. */
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struct ast_sdp_options *options;
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/*! Translator that puts SDPs into the expected representation */
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struct ast_sdp_translator *translator;
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/*! RTP instance for each media stream */
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AST_VECTOR(, struct ast_rtp_instance *) rtp;
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};
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struct ast_sdp_state *ast_sdp_state_alloc(struct ast_stream_topology *streams, struct ast_sdp_options *options)
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{
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struct ast_sdp_state *sdp_state;
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sdp_state = ast_calloc(1, sizeof(*sdp_state));
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if (!sdp_state) {
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return NULL;
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}
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sdp_state->options = options;
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sdp_state->translator = ast_sdp_translator_new(ast_sdp_options_get_repr(sdp_state->options));
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if (!sdp_state->translator) {
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ast_sdp_state_free(sdp_state);
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return NULL;
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}
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sdp_state->local_capabilities = ast_stream_topology_clone(streams);
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if (!sdp_state->local_capabilities) {
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ast_sdp_state_free(sdp_state);
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return NULL;
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}
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return sdp_state;
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}
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void ast_sdp_state_free(struct ast_sdp_state *sdp_state)
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{
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if (!sdp_state) {
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return;
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}
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ast_stream_topology_free(sdp_state->local_capabilities);
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ast_stream_topology_free(sdp_state->remote_capabilities);
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ast_stream_topology_free(sdp_state->joint_capabilities);
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ast_sdp_free(sdp_state->local_sdp);
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ast_sdp_free(sdp_state->remote_sdp);
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ast_sdp_free(sdp_state->joint_sdp);
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ast_sdp_options_free(sdp_state->options);
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ast_sdp_translator_free(sdp_state->translator);
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}
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struct ast_rtp_instance *ast_sdp_state_get_rtp_instance(struct ast_sdp_state *sdp_state, int stream_index)
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{
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if (stream_index >= AST_VECTOR_SIZE(&sdp_state->rtp)) {
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return NULL;
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}
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return AST_VECTOR_GET(&sdp_state->rtp, stream_index);
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}
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struct ast_stream_topology *ast_sdp_state_get_joint_topology(struct ast_sdp_state *sdp_state)
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{
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if (sdp_state->joint_capabilities) {
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return sdp_state->joint_capabilities;
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} else {
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return sdp_state->local_capabilities;
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}
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}
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