ortp_send.c

   1 /*
   2  * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file ortp_send.c para_server's ortp sender */
   8
   9 #include <ortp/ortp.h>
  10 #include <ortp/port.h>
  11
  12 #include "server.cmdline.h"
  13 #include "para.h"
  14 #include "afh.h"
  15 #include "server.h"
  16 #include "vss.h"
  17 #include "send.h"
  18 #include "list.h"
  19 #include "ortp.h"
  20 #include "string.h"
  21
  22 /** \cond convert in_addr to ascii */
  23 #define TARGET_ADDR(oc) inet_ntoa((oc)->addr)
  24 /** \endcond */
  25
  26 /** describes one entry in the list of targets for the ortp sender */
  27 struct ortp_target {
  28 /** address info */
  29         struct in_addr addr;
  30 /** whether the ortp sender is activated */
  31         int status;
  32 /** the ortp timestamp increases by this amount */
  33         uint32_t chunk_ts;
  34 /** the currently used timestamp for this target */
  35         uint32_t last_ts;
  36 /** the position of this target in the list of targets */
  37         struct list_head node;
  38 /** the UDP port */
  39         int port;
  40 /** non-zero if at least one chunk has been sent to this target */
  41         int streaming;
  42 /** the session pointer from libortp */
  43         RtpSession *session;
  44 };
  45
  46 static struct list_head targets;
  47 static struct sender *self;
  48
  49 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
  50 {
  51         PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
  52                 ot->port, msg);
  53         if (ot->session) {
  54                 rtp_session_destroy(ot->session);
  55                 ot->session = NULL;
  56         }
  57         list_del(&ot->node);
  58         free(ot);
  59 }
  60
  61 static void ortp_send_buf(char *buf, size_t len, long unsigned chunks_sent)
  62 {
  63         struct ortp_target *ot, *tmp;
  64         int ret, ortp_len = len; /* rtp_session_send_with_ts expects int */
  65
  66         if (ortp_len < 0)
  67                 return;
  68         list_for_each_entry_safe(ot, tmp, &targets, node) {
  69                 uint32_t ts;
  70                 if (!ot->session)
  71                         continue;
  72                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
  73                 ts = ot->chunk_ts * chunks_sent;
  74                 ret = rtp_session_send_with_ts(ot->session,
  75                         (unsigned char*)buf, ortp_len, ts);
  76                 ot->last_ts = ts;
  77                 if (ret < 0)
  78                         ortp_delete_target(ot, "send error");
  79                 if (ret != len + 12)
  80                         PARA_NOTICE_LOG("short write %d\n", ret);
  81         }
  82 }
  83
  84 static int set_multicast(RtpSession *s)
  85 {
  86         unsigned char loop = 1;
  87         int ret;
  88
  89         ret = setsockopt(s->rtp.socket,
  90                 IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));
  91         if (ret < 0) {
  92                 PARA_ERROR_LOG("IP_MULTICAST_LOOP error %d\n", ret);
  93
  94         }
  95         return 1;
  96 }
  97
  98 static void ortp_init_session(struct ortp_target *ot)
  99 {
 100         RtpSession *s;
 101         int ret;
 102
 103         PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
 104         ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
 105         if (!ot->session)
 106                 return;
 107         s = ot->session;
 108         if (conf.ortp_jitter_compensation_arg) {
 109                 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
 110                 rtp_session_set_jitter_compensation(ot->session,
 111                         conf.ortp_jitter_compensation_arg);
 112         }
 113         /* always successful */
 114         rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
 115         ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
 116         if (ret < 0) {
 117                 rtp_session_destroy(ot->session);
 118                 ot->session = NULL;
 119                 return;
 120         }
 121         set_multicast(s);
 122 }
 123
 124 /* called by vss */
 125 static void ortp_shutdown_targets(void)
 126 {
 127         unsigned char buf[ORTP_AUDIO_HEADER_LEN];
 128         struct ortp_target *ot, *tmp;
 129
 130         WRITE_PACKET_TYPE(buf, ORTP_EOF);
 131         list_for_each_entry_safe(ot, tmp, &targets, node) {
 132                 if (!ot->session || !ot->streaming)
 133                         continue;
 134                 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n",
 135                         TARGET_ADDR(ot), ot->port, ot->last_ts);
 136                 rtp_session_send_with_ts(ot->session, buf,
 137                         ORTP_AUDIO_HEADER_LEN, ot->last_ts);
 138                 ot->streaming = 0;
 139                 ot->chunk_ts = 0;
 140                 rtp_session_reset(ot->session);
 141         }
 142 }
 143
 144 static int need_extra_header(long unsigned current_chunk)
 145 {
 146         static struct timeval last_header;
 147         struct timeval now, diff;
 148
 149         if (!current_chunk)
 150                 return 0;
 151         gettimeofday(&now, NULL);
 152         tv_diff(&now, &last_header, &diff);
 153         if (tv2ms(&diff) < conf.ortp_header_interval_arg)
 154                 return 0;
 155         last_header = now;
 156         return 1;
 157 }
 158
 159 static void ortp_send(long unsigned current_chunk, long unsigned chunks_sent,
 160                 const char *buf, size_t len)
 161 {
 162         struct ortp_target *ot, *tmp;
 163         size_t sendbuf_len;
 164         unsigned header_len = 0;
 165         int packet_type = ORTP_DATA;
 166         char *sendbuf, *header_buf = NULL;
 167         struct timeval *chunk_tv;
 168
 169         if (self->status != SENDER_ON)
 170                 return;
 171         chunk_tv = vss_chunk_time();
 172         if (!chunk_tv)
 173                 return;
 174         list_for_each_entry_safe(ot, tmp, &targets, node) {
 175                 if (!ot->session) {
 176                         ortp_init_session(ot);
 177                         if (!ot->session)
 178                                 continue;
 179                 }
 180                 if (!ot->chunk_ts)
 181                         ot->chunk_ts = rtp_session_time_to_ts(ot->session,
 182                                 (int)tv2ms(chunk_tv));
 183 //              PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
 184 //                      len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
 185                 ot->streaming = 1;
 186         }
 187         if (list_empty(&targets))
 188                 return;
 189         header_buf = vss_get_header(&header_len);
 190         if (!need_extra_header(current_chunk))
 191                 header_len = 0;
 192         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
 193         sendbuf = para_malloc(sendbuf_len);
 194         if (!current_chunk)
 195                 packet_type = ORTP_BOF;
 196         else if (header_len)
 197                 packet_type = ORTP_HEADER;
 198         WRITE_PACKET_TYPE(sendbuf, packet_type);
 199         WRITE_CHUNK_TIME(sendbuf, chunk_tv->tv_usec);
 200         WRITE_STREAM_TYPE(sendbuf,  header_buf? 1 : 0);
 201         WRITE_HEADER_LEN(sendbuf, header_len);
 202         if (header_len)
 203                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
 204                         header_len);
 205         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
 206         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
 207         free(sendbuf);
 208 }
 209
 210 static int ortp_com_on(__a_unused struct sender_command_data *scd)
 211 {
 212
 213         self->status = SENDER_ON;
 214         return 1;
 215 }
 216
 217 static int ortp_com_off(__a_unused struct sender_command_data *scd)
 218 {
 219         ortp_shutdown_targets();
 220         self->status = SENDER_OFF;
 221         return 1;
 222 }
 223
 224 static int ortp_com_delete(struct sender_command_data *scd)
 225 {
 226         char *a = para_strdup(inet_ntoa(scd->addr));
 227         struct ortp_target *ot, *tmp;
 228         list_for_each_entry_safe(ot, tmp, &targets, node) {
 229                 if (scd->port != ot->port)
 230                         continue;
 231                 if (strcmp(TARGET_ADDR(ot), a))
 232                         continue;
 233                 ortp_delete_target(ot, "com_delete");
 234         }
 235         return 1;
 236 }
 237
 238 static void ortp_add_target(int port, struct in_addr *addr)
 239 {
 240         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
 241         ot->port = port;
 242         ot->addr = *addr;
 243         PARA_INFO_LOG("adding to target list (%s:%d)\n",
 244                 TARGET_ADDR(ot), ot->port);
 245         para_list_add(&ot->node, &targets);
 246 }
 247
 248 static int ortp_com_add(struct sender_command_data *scd)
 249 {
 250         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
 251         ortp_add_target(port, &scd->addr);
 252         return 1;
 253 }
 254
 255 static char *ortp_info(void)
 256 {
 257         struct ortp_target *ot;
 258         char *ret, *tgts = NULL;
 259
 260         list_for_each_entry(ot, &targets, node) {
 261                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
 262                         TARGET_ADDR(ot), ot->port);
 263                 free(tgts);
 264                 tgts = tmp;
 265         }
 266         ret = make_message(
 267                 "ortp status: %s\n"
 268                 "ortp default port: udp %d\n"
 269                 "ortp targets: %s\n",
 270                 (self->status == SENDER_ON)? "on" : "off",
 271                 conf.ortp_default_port_arg,
 272                 tgts? tgts : "(none)"
 273         );
 274         free(tgts);
 275         return ret;
 276 }
 277
 278 static void ortp_init_target_list(void)
 279 {
 280         int i;
 281
 282         INIT_LIST_HEAD(&targets);
 283         for (i = 0; i < conf.ortp_target_given; i++) {
 284                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 285                 char *p = strchr(arg, ':');
 286                 int port;
 287                 struct in_addr addr;
 288
 289                 if (!p)
 290                         goto err;
 291                 *p = '\0';
 292                 if (!inet_aton(arg, &addr))
 293                         goto err;
 294                 port = atoi(++p);
 295                 if (port < 0 || port > 65535)
 296                         port = conf.ortp_default_port_arg;
 297                 ortp_add_target(port, &addr);
 298                 goto success;
 299 err:
 300                 PARA_CRIT_LOG("syntax error for ortp_target option "
 301                         "#%d, ignoring\n", i);
 302 success:
 303                 free(arg);
 304                 continue;
 305         }
 306 }
 307
 308 static void ortp_pre_select(__a_unused  int *max_fileno, __a_unused fd_set *rfds,
 309         __a_unused fd_set *wfds)
 310 {
 311         return;
 312 }
 313
 314 static char *ortp_help(void)
 315 {
 316         return make_message(
 317                 "usage: {on|off}\n"
 318                 "usage: {add|delete} IP port\n"
 319                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 320         );
 321 }
 322
 323 /**
 324  * the init function of para_server's ortp sender
 325  *
 326  * \param s pointer to the http sender struct
 327  *
 328  * It initializes all function pointers of \a s and the list of ortp targets.
 329  */
 330 void ortp_send_init(struct sender *s)
 331 {
 332         ortp_init();
 333         INIT_LIST_HEAD(&targets);
 334         s->info = ortp_info;
 335         s->help = ortp_help;
 336         s->send = ortp_send;
 337         s->pre_select = ortp_pre_select;
 338         s->post_select = NULL;
 339         s->shutdown_clients = ortp_shutdown_targets;
 340         s->client_cmds[SENDER_ON] = ortp_com_on;
 341         s->client_cmds[SENDER_OFF] = ortp_com_off;
 342         s->client_cmds[SENDER_DENY] = NULL;
 343         s->client_cmds[SENDER_ALLOW] = NULL;
 344         s->client_cmds[SENDER_ADD] = ortp_com_add;
 345         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 346         self = s;
 347         s->status = SENDER_OFF;
 348         ortp_init_target_list();
 349         if (!conf.ortp_no_autostart_given)
 350                 s->status = SENDER_ON;
 351         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
 352 }