ortp_send.c

   1 /*
   2  * Copyright (C) 2005-2007 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 #include <ortp/port.h>
  23
  24 #include "server.cmdline.h"
  25 #include "server.h"
  26 #include "vss.h"
  27 #include "send.h"
  28 #include "list.h"
  29 #include "ortp.h"
  30 #include "string.h"
  31
  32 /** \cond convert in_addr to ascii */
  33 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
  34 /** \endcond */
  35
  36 /** describes one entry in the list of targets for the ortp sender */
  37 struct ortp_target {
  38 /** address info */
  39         struct in_addr addr;
  40 /** whether the ortp sender is activated */
  41         int status;
  42 /** the ortp timestamp increases by this amount */
  43         uint32_t chunk_ts;
  44 /** the currently used timestamp for this target */
  45         uint32_t last_ts;
  46 /** the position of this target in the list of targets */
  47         struct list_head node;
  48 /** the UDP port */
  49         int port;
  50 /** non-zero if at least one chunk has been sent to this target */
  51         int streaming;
  52 /** the session pointer from libortp */
  53         RtpSession *session;
  54 };
  55
  56 static struct list_head targets;
  57 static struct sender *self;
  58
  59 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
  60 {
  61         PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
  62                 ot->port, msg);
  63         if (ot->session) {
  64                 rtp_session_destroy(ot->session);
  65                 ot->session = NULL;
  66         }
  67         list_del(&ot->node);
  68         free(ot);
  69 }
  70
  71 static void ortp_send_buf(char *buf, size_t len, long unsigned chunks_sent)
  72 {
  73         struct ortp_target *ot, *tmp;
  74         int ret, ortp_len = len; /* rtp_session_send_with_ts expects int */
  75
  76         if (ortp_len < 0)
  77                 return;
  78         list_for_each_entry_safe(ot, tmp, &targets, node) {
  79                 uint32_t ts;
  80                 if (!ot->session)
  81                         continue;
  82                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
  83                 ts = ot->chunk_ts * chunks_sent;
  84                 ret = rtp_session_send_with_ts(ot->session,
  85                         (unsigned char*)buf, ortp_len, ts);
  86                 ot->last_ts = ts;
  87                 if (ret < 0)
  88                         ortp_delete_target(ot, "send error");
  89                 if (ret != len + 12)
  90                         PARA_NOTICE_LOG("short write %d\n", ret);
  91         }
  92 }
  93
  94 static int set_multicast(RtpSession *s)
  95 {
  96         unsigned char loop = 1;
  97         int ret;
  98
  99         ret = setsockopt(s->rtp.socket,
 100                 IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));
 101         if (ret < 0) {
 102                 PARA_ERROR_LOG("IP_MULTICAST_LOOP error %d\n", ret);
 103
 104         }
 105         return 1;
 106 }
 107
 108 static void ortp_init_session(struct ortp_target *ot)
 109 {
 110         RtpSession *s;
 111         int ret;
 112
 113         PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
 114         ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
 115         if (!ot->session)
 116                 return;
 117         s = ot->session;
 118         if (conf.ortp_jitter_compensation_arg) {
 119                 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
 120                 rtp_session_set_jitter_compensation(ot->session,
 121                         conf.ortp_jitter_compensation_arg);
 122         }
 123         /* always successful */
 124         rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
 125         ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
 126         if (ret < 0) {
 127                 rtp_session_destroy(ot->session);
 128                 ot->session = NULL;
 129                 return;
 130         }
 131         set_multicast(s);
 132 }
 133
 134 /* called by vss */
 135 static void ortp_shutdown_targets(void)
 136 {
 137         unsigned char buf[ORTP_AUDIO_HEADER_LEN];
 138         struct ortp_target *ot, *tmp;
 139
 140         WRITE_PACKET_TYPE(buf, ORTP_EOF);
 141         list_for_each_entry_safe(ot, tmp, &targets, node) {
 142                 if (!ot->session || !ot->streaming)
 143                         continue;
 144                 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n",
 145                         TARGET_ADDR(ot), ot->port, ot->last_ts);
 146                 rtp_session_send_with_ts(ot->session, buf,
 147                         ORTP_AUDIO_HEADER_LEN, ot->last_ts);
 148                 ot->streaming = 0;
 149                 ot->chunk_ts = 0;
 150                 rtp_session_reset(ot->session);
 151         }
 152 }
 153
 154 static int need_extra_header(long unsigned current_chunk)
 155 {
 156         static struct timeval last_header;
 157         struct timeval now, diff;
 158
 159         if (!current_chunk)
 160                 return 0;
 161         gettimeofday(&now, NULL);
 162         tv_diff(&now, &last_header, &diff);
 163         if (tv2ms(&diff) < conf.ortp_header_interval_arg)
 164                 return 0;
 165         last_header = now;
 166         return 1;
 167 }
 168
 169 static void ortp_send(long unsigned current_chunk, long unsigned chunks_sent,
 170                 const char *buf, size_t len)
 171 {
 172         struct ortp_target *ot, *tmp;
 173         size_t sendbuf_len;
 174         size_t header_len = 0;
 175         int packet_type = ORTP_DATA;
 176         char *sendbuf, *header_buf = NULL;
 177         struct timeval *chunk_tv;
 178
 179         if (self->status != SENDER_ON)
 180                 return;
 181         chunk_tv = vss_chunk_time();
 182         if (!chunk_tv)
 183                 return;
 184         list_for_each_entry_safe(ot, tmp, &targets, node) {
 185                 if (!ot->session) {
 186                         ortp_init_session(ot);
 187                         if (!ot->session)
 188                                 continue;
 189                 }
 190                 if (!ot->chunk_ts)
 191                         ot->chunk_ts = rtp_session_time_to_ts(ot->session,
 192                                 (int)tv2ms(chunk_tv));
 193 //              PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
 194 //                      len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
 195                 ot->streaming = 1;
 196         }
 197         if (list_empty(&targets))
 198                 return;
 199         header_buf = vss_get_header(&header_len);
 200         if (!need_extra_header(current_chunk))
 201                 header_len = 0;
 202         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
 203         sendbuf = para_malloc(sendbuf_len);
 204         if (!current_chunk)
 205                 packet_type = ORTP_BOF;
 206         else if (header_len)
 207                 packet_type = ORTP_HEADER;
 208         WRITE_PACKET_TYPE(sendbuf, packet_type);
 209         WRITE_CHUNK_TIME(sendbuf, chunk_tv->tv_usec);
 210         WRITE_STREAM_TYPE(sendbuf,  header_buf? 1 : 0);
 211         WRITE_HEADER_LEN(sendbuf, header_len);
 212         if (header_len)
 213                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
 214                         header_len);
 215         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
 216         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
 217         free(sendbuf);
 218 }
 219
 220 static int ortp_com_on(__a_unused struct sender_command_data *scd)
 221 {
 222
 223         self->status = SENDER_ON;
 224         return 1;
 225 }
 226
 227 static int ortp_com_off(__a_unused struct sender_command_data *scd)
 228 {
 229         ortp_shutdown_targets();
 230         self->status = SENDER_OFF;
 231         return 1;
 232 }
 233
 234 static int ortp_com_delete(struct sender_command_data *scd)
 235 {
 236         char *a = para_strdup(inet_ntoa(scd->addr));
 237         struct ortp_target *ot, *tmp;
 238         list_for_each_entry_safe(ot, tmp, &targets, node) {
 239                 if (scd->port != ot->port)
 240                         continue;
 241                 if (strcmp(TARGET_ADDR(ot), a))
 242                         continue;
 243                 ortp_delete_target(ot, "com_delete");
 244         }
 245         return 1;
 246 }
 247
 248 static void ortp_add_target(int port, struct in_addr *addr)
 249 {
 250         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
 251         ot->port = port;
 252         ot->addr = *addr;
 253         PARA_INFO_LOG("adding to target list (%s:%d)\n",
 254                 TARGET_ADDR(ot), ot->port);
 255         para_list_add(&ot->node, &targets);
 256 }
 257
 258 static int ortp_com_add(struct sender_command_data *scd)
 259 {
 260         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
 261         ortp_add_target(port, &scd->addr);
 262         return 1;
 263 }
 264
 265 static char *ortp_info(void)
 266 {
 267         struct ortp_target *ot;
 268         char *ret, *tgts = NULL;
 269
 270         list_for_each_entry(ot, &targets, node) {
 271                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
 272                         TARGET_ADDR(ot), ot->port);
 273                 free(tgts);
 274                 tgts = tmp;
 275         }
 276         ret = make_message(
 277                 "ortp status: %s\n"
 278                 "ortp default port: udp %d\n"
 279                 "ortp targets: %s\n",
 280                 (self->status == SENDER_ON)? "on" : "off",
 281                 conf.ortp_default_port_arg,
 282                 tgts? tgts : "(none)"
 283         );
 284         free(tgts);
 285         return ret;
 286 }
 287
 288 static void ortp_init_target_list(void)
 289 {
 290         int i;
 291
 292         INIT_LIST_HEAD(&targets);
 293         for (i = 0; i < conf.ortp_target_given; i++) {
 294                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 295                 char *p = strchr(arg, ':');
 296                 int port;
 297                 struct in_addr addr;
 298
 299                 if (!p)
 300                         goto err;
 301                 *p = '\0';
 302                 if (!inet_aton(arg, &addr))
 303                         goto err;
 304                 port = atoi(++p);
 305                 if (port < 0 || port > 65535)
 306                         port = conf.ortp_default_port_arg;
 307                 ortp_add_target(port, &addr);
 308                 goto success;
 309 err:
 310                 PARA_CRIT_LOG("syntax error for ortp_target option "
 311                         "#%d, ignoring\n", i);
 312 success:
 313                 free(arg);
 314                 continue;
 315         }
 316 }
 317
 318 static void ortp_pre_select(__a_unused  int *max_fileno, __a_unused fd_set *rfds,
 319         __a_unused fd_set *wfds)
 320 {
 321         return;
 322 }
 323
 324 static char *ortp_help(void)
 325 {
 326         return make_message(
 327                 "usage: {on|off}\n"
 328                 "usage: {add|delete} IP port\n"
 329                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 330         );
 331 }
 332
 333 /**
 334  * the init function of para_server's ortp sender
 335  *
 336  * \param s pointer to the http sender struct
 337  *
 338  * It initializes all function pointers of \a s and the list of ortp targets.
 339  */
 340 void ortp_send_init(struct sender *s)
 341 {
 342         ortp_init();
 343         INIT_LIST_HEAD(&targets);
 344         s->info = ortp_info;
 345         s->help = ortp_help;
 346         s->send = ortp_send;
 347         s->pre_select = ortp_pre_select;
 348         s->post_select = NULL;
 349         s->shutdown_clients = ortp_shutdown_targets;
 350         s->client_cmds[SENDER_ON] = ortp_com_on;
 351         s->client_cmds[SENDER_OFF] = ortp_com_off;
 352         s->client_cmds[SENDER_DENY] = NULL;
 353         s->client_cmds[SENDER_ALLOW] = NULL;
 354         s->client_cmds[SENDER_ADD] = ortp_com_add;
 355         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 356         self = s;
 357         s->status = SENDER_OFF;
 358         ortp_init_target_list();
 359         if (!conf.ortp_no_autostart_given)
 360                 s->status = SENDER_ON;
 361         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
 362 }