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