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