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-rw-r--r--src/libmgcp/mgcp_sdp.c305
1 files changed, 0 insertions, 305 deletions
diff --git a/src/libmgcp/mgcp_sdp.c b/src/libmgcp/mgcp_sdp.c
deleted file mode 100644
index b64894496..000000000
--- a/src/libmgcp/mgcp_sdp.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- * Some SDP file parsing...
- *
- * (C) 2009-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2009-2014 by On-Waves
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include <openbsc/mgcp.h>
-#include <openbsc/mgcp_internal.h>
-
-#include <errno.h>
-
-struct sdp_rtp_map {
- /* the type */
- int payload_type;
- /* null, static or later dynamic codec name */
- char *codec_name;
- /* A pointer to the original line for later parsing */
- char *map_line;
-
- int rate;
- int channels;
-};
-
-int mgcp_set_audio_info(void *ctx, struct mgcp_rtp_codec *codec,
- int payload_type, const char *audio_name)
-{
- int rate = codec->rate;
- int channels = codec->channels;
- char audio_codec[64];
-
- talloc_free(codec->subtype_name);
- codec->subtype_name = NULL;
- talloc_free(codec->audio_name);
- codec->audio_name = NULL;
-
- if (payload_type != PTYPE_UNDEFINED)
- codec->payload_type = payload_type;
-
- if (!audio_name) {
- switch (payload_type) {
- case 0: audio_name = "PCMU/8000/1"; break;
- case 3: audio_name = "GSM/8000/1"; break;
- case 8: audio_name = "PCMA/8000/1"; break;
- case 18: audio_name = "G729/8000/1"; break;
- default:
- /* Payload type is unknown, don't change rate and
- * channels. */
- /* TODO: return value? */
- return 0;
- }
- }
-
- if (sscanf(audio_name, "%63[^/]/%d/%d",
- audio_codec, &rate, &channels) < 1)
- return -EINVAL;
-
- codec->rate = rate;
- codec->channels = channels;
- codec->subtype_name = talloc_strdup(ctx, audio_codec);
- codec->audio_name = talloc_strdup(ctx, audio_name);
-
- if (!strcmp(audio_codec, "G729")) {
- codec->frame_duration_num = 10;
- codec->frame_duration_den = 1000;
- } else {
- codec->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM;
- codec->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN;
- }
-
- if (payload_type < 0) {
- payload_type = 96;
- if (rate == 8000 && channels == 1) {
- if (!strcmp(audio_codec, "GSM"))
- payload_type = 3;
- else if (!strcmp(audio_codec, "PCMA"))
- payload_type = 8;
- else if (!strcmp(audio_codec, "PCMU"))
- payload_type = 0;
- else if (!strcmp(audio_codec, "G729"))
- payload_type = 18;
- }
-
- codec->payload_type = payload_type;
- }
-
- if (channels != 1)
- LOGP(DMGCP, LOGL_NOTICE,
- "Channels != 1 in SDP: '%s'\n", audio_name);
-
- return 0;
-}
-
-void codecs_initialize(void *ctx, struct sdp_rtp_map *codecs, int used)
-{
- int i;
-
- for (i = 0; i < used; ++i) {
- switch (codecs[i].payload_type) {
- case 0:
- codecs[i].codec_name = "PCMU";
- codecs[i].rate = 8000;
- codecs[i].channels = 1;
- break;
- case 3:
- codecs[i].codec_name = "GSM";
- codecs[i].rate = 8000;
- codecs[i].channels = 1;
- break;
- case 8:
- codecs[i].codec_name = "PCMA";
- codecs[i].rate = 8000;
- codecs[i].channels = 1;
- break;
- case 18:
- codecs[i].codec_name = "G729";
- codecs[i].rate = 8000;
- codecs[i].channels = 1;
- break;
- }
- }
-}
-
-void codecs_update(void *ctx, struct sdp_rtp_map *codecs, int used, int payload, char *audio_name)
-{
- int i;
-
- for (i = 0; i < used; ++i) {
- char audio_codec[64];
- int rate = -1;
- int channels = -1;
- if (codecs[i].payload_type != payload)
- continue;
- if (sscanf(audio_name, "%63[^/]/%d/%d",
- audio_codec, &rate, &channels) < 1) {
- LOGP(DMGCP, LOGL_ERROR, "Failed to parse '%s'\n", audio_name);
- continue;
- }
-
- codecs[i].map_line = talloc_strdup(ctx, audio_name);
- codecs[i].codec_name = talloc_strdup(ctx, audio_codec);
- codecs[i].rate = rate;
- codecs[i].channels = channels;
- return;
- }
-
- LOGP(DMGCP, LOGL_ERROR, "Unconfigured PT(%d) with %s\n", payload, audio_name);
-}
-
-int is_codec_compatible(struct mgcp_endpoint *endp, struct sdp_rtp_map *codec)
-{
- char *bts_codec;
- char audio_codec[64];
-
- if (!codec->codec_name)
- return 0;
-
- /*
- * GSM, GSM/8000 and GSM/8000/1 should all be compatible.. let's go
- * by name first.
- */
- bts_codec = endp->tcfg->audio_name;
- if (sscanf(bts_codec, "%63[^/]/%*d/%*d", audio_codec) < 1)
- return 0;
-
- return strcasecmp(audio_codec, codec->codec_name) == 0;
-}
-
-int mgcp_parse_sdp_data(struct mgcp_endpoint *endp, struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p)
-{
- struct sdp_rtp_map codecs[10];
- int codecs_used = 0;
- char *line;
- int maxptime = -1;
- int i;
- int codecs_assigned = 0;
- void *tmp_ctx = talloc_new(NULL);
-
- memset(&codecs, 0, sizeof(codecs));
-
- for_each_line(line, p->save) {
- switch (line[0]) {
- case 'o':
- case 's':
- case 't':
- case 'v':
- /* skip these SDP attributes */
- break;
- case 'a': {
- int payload;
- int ptime, ptime2 = 0;
- char audio_name[64];
-
-
- if (sscanf(line, "a=rtpmap:%d %63s",
- &payload, audio_name) == 2) {
- codecs_update(tmp_ctx, codecs, codecs_used, payload, audio_name);
- } else if (sscanf(line, "a=ptime:%d-%d",
- &ptime, &ptime2) >= 1) {
- if (ptime2 > 0 && ptime2 != ptime)
- rtp->packet_duration_ms = 0;
- else
- rtp->packet_duration_ms = ptime;
- } else if (sscanf(line, "a=maxptime:%d", &ptime2) == 1) {
- maxptime = ptime2;
- }
- break;
- }
- case 'm': {
- int port, rc;
-
- rc = sscanf(line, "m=audio %d RTP/AVP %d %d %d %d %d %d %d %d %d %d",
- &port,
- &codecs[0].payload_type,
- &codecs[1].payload_type,
- &codecs[2].payload_type,
- &codecs[3].payload_type,
- &codecs[4].payload_type,
- &codecs[5].payload_type,
- &codecs[6].payload_type,
- &codecs[7].payload_type,
- &codecs[8].payload_type,
- &codecs[9].payload_type);
- if (rc >= 2) {
- rtp->rtp_port = htons(port);
- rtp->rtcp_port = htons(port + 1);
- codecs_used = rc - 1;
- codecs_initialize(tmp_ctx, codecs, codecs_used);
- }
- break;
- }
- case 'c': {
- char ipv4[16];
-
- if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) {
- inet_aton(ipv4, &rtp->addr);
- }
- break;
- }
- default:
- if (p->endp)
- LOGP(DMGCP, LOGL_NOTICE,
- "Unhandled SDP option: '%c'/%d on 0x%x\n",
- line[0], line[0], ENDPOINT_NUMBER(p->endp));
- else
- LOGP(DMGCP, LOGL_NOTICE,
- "Unhandled SDP option: '%c'/%d\n",
- line[0], line[0]);
- break;
- }
- }
-
- /* Now select the primary and alt_codec */
- for (i = 0; i < codecs_used && codecs_assigned < 2; ++i) {
- struct mgcp_rtp_codec *codec = codecs_assigned == 0 ?
- &rtp->codec : &rtp->alt_codec;
-
- if (endp->tcfg->no_audio_transcoding &&
- !is_codec_compatible(endp, &codecs[i])) {
- LOGP(DMGCP, LOGL_NOTICE, "Skipping codec %s\n",
- codecs[i].codec_name);
- continue;
- }
-
- mgcp_set_audio_info(p->cfg, codec,
- codecs[i].payload_type,
- codecs[i].map_line);
- codecs_assigned += 1;
- }
-
- if (codecs_assigned > 0) {
- /* TODO/XXX: Store this per codec and derive it on use */
- if (maxptime >= 0 && maxptime * rtp->codec.frame_duration_den >
- rtp->codec.frame_duration_num * 1500) {
- /* more than 1 frame */
- rtp->packet_duration_ms = 0;
- }
-
- LOGP(DMGCP, LOGL_NOTICE,
- "Got media info via SDP: port %d, payload %d (%s), "
- "duration %d, addr %s\n",
- ntohs(rtp->rtp_port), rtp->codec.payload_type,
- rtp->codec.subtype_name ? rtp->codec.subtype_name : "unknown",
- rtp->packet_duration_ms, inet_ntoa(rtp->addr));
- }
-
- talloc_free(tmp_ctx);
- return codecs_assigned > 0;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 22:25:17 +0000