ortp_send.c

   1 /*
   2  * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file ortp_send.c para_server's ortp sender */
  20
  21 #include <ortp/ortp.h>
  22
  23 #include "server.cmdline.h"
  24 #include "server.h"
  25 #include "afs.h"
  26 #include "send.h"
  27 #include "list.h"
  28 #include "ortp.h"
  29 #include "string.h"
  30
  31 /** \cond convert in_addr to ascii */
  32 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
  33 /** \endcond */
  34
  35 extern struct gengetopt_args_info conf;
  36
  37 /** describes one entry in the list of targets for the ortp sender */
  38 struct ortp_target {
  39 /** address info */
  40         struct in_addr addr;
  41 /** whether the ortp sender is activated */
  42         int status;
  43 /** the ortp timestamp increases by this amount */
  44         int chunk_ts;
  45 /** the currently used timestamp for this target */
  46         int last_ts;
  47 /** the position of this target in the list of targets */
  48         struct list_head node;
  49 /** the UDP port */
  50         int port;
  51 /** non-zero if at least one chunk has been sent to this target */
  52         int streaming;
  53 /** the session pointer from libortp */
  54         RtpSession *session;
  55 };
  56
  57 static int numtargets;
  58 static struct list_head targets;
  59 static struct sender *self;
  60
  61 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
  62 {
  63         PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
  64                 ot->port, msg);
  65         if (ot->session) {
  66                 rtp_session_destroy(ot->session);
  67                 ot->session = NULL;
  68         }
  69         numtargets--;
  70         list_del(&ot->node);
  71         free(ot);
  72 }
  73
  74 static void ortp_send_buf(char *buf, int len, long unsigned chunks_sent)
  75 {
  76         struct ortp_target *ot, *tmp;
  77         int ret;
  78
  79         list_for_each_entry_safe(ot, tmp, &targets, node) {
  80                 struct timeval now;
  81                 int ts;
  82                 gettimeofday(&now, NULL);
  83                 if (!ot->session)
  84                         continue;
  85                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
  86                 ts = ot->chunk_ts * chunks_sent;
  87                 ret = rtp_session_send_with_ts(ot->session, buf, len, ts);
  88                 ot->last_ts = ts;
  89                 if (ret < 0)
  90                         ortp_delete_target(ot, "send error");
  91                 if (ret != len +12)
  92                         PARA_NOTICE_LOG("short write %d\n", ret);
  93         }
  94 }
  95
  96 static void ortp_init_session(struct ortp_target *ot)
  97 {
  98         RtpSession *s;
  99         int ret;
 100
 101         PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
 102         ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
 103         if (!ot->session)
 104                 return;
 105         s = ot->session;
 106         if (conf.ortp_jitter_compensation_arg) {
 107                 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
 108                 rtp_session_set_jitter_compensation(ot->session,
 109                         conf.ortp_jitter_compensation_arg);
 110         }
 111         /* always successful */
 112         rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
 113         ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
 114         if (ret < 0) {
 115                 rtp_session_destroy(ot->session);
 116                 ot->session = NULL;
 117         }
 118 }
 119
 120 /* called by afs */
 121 static void ortp_shutdown_targets(void)
 122 {
 123         char buf[2];
 124         struct ortp_target *ot, *tmp;
 125
 126         buf[0] = ORTP_EOF;
 127         list_for_each_entry_safe(ot, tmp, &targets, node) {
 128                 if (!ot->session || !ot->streaming)
 129                         continue;
 130                 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n", TARGET_ADDR(ot), ot->port,
 131                         ot->last_ts);
 132                 rtp_session_send_with_ts(ot->session, buf, 1, ot->last_ts);
 133                 ot->streaming = 0;
 134                 ot->chunk_ts = 0;
 135                 rtp_session_reset(ot->session);
 136         }
 137 }
 138
 139 static int need_extra_header(struct audio_format *af, long unsigned chunks_sent)
 140 {
 141         /* FIXME: No need to compute this on every run */
 142         int mod = conf.ortp_header_interval_arg / (tv2ms(&af->chunk_tv) + 1);
 143         if (mod && (chunks_sent % mod))
 144                 return 0;
 145         return 1;
 146 }
 147
 148 static void ortp_send(struct audio_format *af, long unsigned current_chunk,
 149                 long unsigned chunks_sent, const char *buf, size_t len)
 150 {
 151         struct ortp_target *ot, *tmp;
 152         size_t sendbuf_len;
 153         int header_len = 0;
 154         int packet_type = ORTP_DATA, stream_type = af && af->get_header_info; /* header stream? */
 155         char *sendbuf, *header_buf = NULL;
 156
 157         if (self->status != SENDER_ON)
 158                 return;
 159         list_for_each_entry_safe(ot, tmp, &targets, node) {
 160                 if (!ot->session) {
 161                         ortp_init_session(ot);
 162                         if (!ot->session)
 163                                 continue;
 164                 }
 165                 if (!ot->chunk_ts)
 166                         ot->chunk_ts = rtp_session_time_to_ts(ot->session,
 167                                 tv2ms(&af->chunk_tv));
 168 //              PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
 169 //                      len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
 170                 ot->streaming = 1;
 171         }
 172         if (list_empty(&targets))
 173                 return;
 174         if (stream_type) {
 175                 header_buf = af->get_header_info(&header_len);
 176                 if (!need_extra_header(af, chunks_sent))
 177                         header_len = 0;
 178         }
 179         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
 180         sendbuf = para_malloc(sendbuf_len);
 181         if (!current_chunk)
 182                 packet_type = ORTP_BOF;
 183         else if (header_len)
 184                 packet_type = ORTP_HEADER;
 185         WRITE_PACKET_TYPE(sendbuf, packet_type);
 186         WRITE_CHUNK_TIME(sendbuf, af->chunk_tv.tv_usec);
 187         WRITE_STREAM_TYPE(sendbuf, stream_type);
 188         WRITE_HEADER_LEN(sendbuf, header_len);
 189         if (header_len)
 190                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
 191                         header_len);
 192         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
 193         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
 194         free(sendbuf);
 195 }
 196
 197 static int ortp_com_on(struct sender_command_data *scd)
 198 {
 199
 200         self->status = SENDER_ON;
 201         return 1;
 202 }
 203
 204 static int ortp_com_off(struct sender_command_data *scd)
 205 {
 206         ortp_shutdown_targets();
 207         self->status = SENDER_OFF;
 208         return 1;
 209 }
 210
 211 static int ortp_com_delete(struct sender_command_data *scd)
 212 {
 213         char *a = para_strdup(inet_ntoa(scd->addr));
 214         struct ortp_target *ot, *tmp;
 215         list_for_each_entry_safe(ot, tmp, &targets, node) {
 216                 if (scd->port != ot->port)
 217                         continue;
 218                 if (strcmp(TARGET_ADDR(ot), a))
 219                         continue;
 220                 ortp_delete_target(ot, "com_delete");
 221         }
 222         return 1;
 223 }
 224
 225 static void ortp_add_target(int port, struct in_addr *addr)
 226 {
 227         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
 228         ot->port = port;
 229         ot->addr = *addr;
 230         PARA_INFO_LOG("adding to target list (%s:%d)\n",
 231                 TARGET_ADDR(ot), ot->port);
 232         list_add(&ot->node, &targets);
 233 }
 234
 235 static int ortp_com_add(struct sender_command_data *scd)
 236 {
 237         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
 238         ortp_add_target(port, &scd->addr);
 239         return 1;
 240 }
 241
 242 static char *ortp_info(void)
 243 {
 244         struct ortp_target *ot;
 245         char *ret, *tgts = NULL;
 246
 247         list_for_each_entry(ot, &targets, node) {
 248                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
 249                         TARGET_ADDR(ot), ot->port);
 250                 free(tgts);
 251                 tgts = tmp;
 252         }
 253         ret = make_message(
 254                 "ortp status: %s\n"
 255                 "ortp default port: udp %d\n"
 256                 "ortp targets: %s\n",
 257                 (self->status == SENDER_ON)? "on" : "off",
 258                 conf.ortp_default_port_arg,
 259                 tgts? tgts : "(none)"
 260         );
 261         free(tgts);
 262         return ret;
 263 }
 264
 265 static void ortp_init_target_list(void)
 266 {
 267         int i;
 268
 269         INIT_LIST_HEAD(&targets);
 270         for (i = 0; i < conf.ortp_target_given; i++) {
 271                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 272                 char *p = strchr(arg, ':');
 273                 int port;
 274                 struct in_addr addr;
 275
 276                 if (!p)
 277                         goto err;
 278                 *p = '\0';
 279                 if (!inet_aton(arg, &addr))
 280                         goto err;
 281                 port = atoi(++p);
 282                 if (port < 0 || port > 65535)
 283                         port = conf.ortp_default_port_arg;
 284                 ortp_add_target(port, &addr);
 285                 goto success;
 286 err:
 287                 PARA_CRIT_LOG("syntax error for ortp_target option "
 288                         "#%d, ignoring\n", i);
 289 success:
 290                 free(arg);
 291                 continue;
 292         }
 293 }
 294
 295 static void ortp_pre_select(struct audio_format *af, int *max_fileno,
 296                 fd_set *rfds, fd_set *wfds)
 297 {
 298         return;
 299 }
 300
 301 static char *ortp_help(void)
 302 {
 303         return make_message(
 304                 "usage: {on|off}\n"
 305                 "usage: {add|delete} IP port\n"
 306                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 307         );
 308 }
 309
 310 /**
 311  * the init function of para_server's ortp sender
 312  *
 313  * \param s pointer to the http sender struct
 314  *
 315  * It initializes all function pointers of \a s and the list of ortp targets.
 316  */
 317 void ortp_send_init(struct sender *s)
 318 {
 319         ortp_init();
 320         INIT_LIST_HEAD(&targets);
 321         s->info = ortp_info;
 322         s->help = ortp_help;
 323         s->send = ortp_send;
 324         s->pre_select = ortp_pre_select;
 325         s->post_select = NULL;
 326         s->shutdown_clients = ortp_shutdown_targets;
 327         s->client_cmds[SENDER_ON] = ortp_com_on;
 328         s->client_cmds[SENDER_OFF] = ortp_com_off;
 329         s->client_cmds[SENDER_DENY] = NULL;
 330         s->client_cmds[SENDER_ALLOW] = NULL;
 331         s->client_cmds[SENDER_ADD] = ortp_com_add;
 332         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 333         self = s;
 334         s->status = SENDER_OFF;
 335         ortp_init_target_list();
 336         if (!conf.ortp_no_autostart_given)
 337                 s->status = SENDER_ON;
 338         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
 339 }