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 struct list_head targets;
  58 static struct sender *self;
  59
  60 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
  61 {
  62         PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
  63                 ot->port, msg);
  64         if (ot->session) {
  65                 rtp_session_destroy(ot->session);
  66                 ot->session = NULL;
  67         }
  68         list_del(&ot->node);
  69         free(ot);
  70 }
  71
  72 static void ortp_send_buf(char *buf, int len, long unsigned chunks_sent)
  73 {
  74         struct ortp_target *ot, *tmp;
  75         int ret;
  76
  77         list_for_each_entry_safe(ot, tmp, &targets, node) {
  78                 struct timeval now;
  79                 int ts;
  80                 gettimeofday(&now, NULL);
  81                 if (!ot->session)
  82                         continue;
  83                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
  84                 ts = ot->chunk_ts * chunks_sent;
  85                 ret = rtp_session_send_with_ts(ot->session, buf, 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 void ortp_init_session(struct ortp_target *ot)
  95 {
  96         RtpSession *s;
  97         int ret;
  98
  99         PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
 100         ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
 101         if (!ot->session)
 102                 return;
 103         s = ot->session;
 104         if (conf.ortp_jitter_compensation_arg) {
 105                 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
 106                 rtp_session_set_jitter_compensation(ot->session,
 107                         conf.ortp_jitter_compensation_arg);
 108         }
 109         /* always successful */
 110         rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
 111         ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
 112         if (ret < 0) {
 113                 rtp_session_destroy(ot->session);
 114                 ot->session = NULL;
 115         }
 116 }
 117
 118 /* called by afs */
 119 static void ortp_shutdown_targets(void)
 120 {
 121         char buf[2];
 122         struct ortp_target *ot, *tmp;
 123
 124         buf[0] = ORTP_EOF;
 125         list_for_each_entry_safe(ot, tmp, &targets, node) {
 126                 if (!ot->session || !ot->streaming)
 127                         continue;
 128                 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n", TARGET_ADDR(ot), ot->port,
 129                         ot->last_ts);
 130                 rtp_session_send_with_ts(ot->session, buf, 1, ot->last_ts);
 131                 ot->streaming = 0;
 132                 ot->chunk_ts = 0;
 133                 rtp_session_reset(ot->session);
 134         }
 135 }
 136
 137 static int need_extra_header(struct audio_format *af, long unsigned chunks_sent)
 138 {
 139         /* FIXME: No need to compute this on every run */
 140         int mod = conf.ortp_header_interval_arg / (tv2ms(&af->chunk_tv) + 1);
 141         if (mod && (chunks_sent % mod))
 142                 return 0;
 143         return 1;
 144 }
 145
 146 static void ortp_send(struct audio_format *af, long unsigned current_chunk,
 147                 long unsigned chunks_sent, const char *buf, size_t len)
 148 {
 149         struct ortp_target *ot, *tmp;
 150         size_t sendbuf_len;
 151         int header_len = 0;
 152         int packet_type = ORTP_DATA, stream_type = af && af->get_header_info; /* header stream? */
 153         char *sendbuf, *header_buf = NULL;
 154
 155         if (self->status != SENDER_ON)
 156                 return;
 157         list_for_each_entry_safe(ot, tmp, &targets, node) {
 158                 if (!ot->session) {
 159                         ortp_init_session(ot);
 160                         if (!ot->session)
 161                                 continue;
 162                 }
 163                 if (!ot->chunk_ts)
 164                         ot->chunk_ts = rtp_session_time_to_ts(ot->session,
 165                                 tv2ms(&af->chunk_tv));
 166 //              PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
 167 //                      len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
 168                 ot->streaming = 1;
 169         }
 170         if (list_empty(&targets))
 171                 return;
 172         if (stream_type) {
 173                 header_buf = af->get_header_info(&header_len);
 174                 if (!need_extra_header(af, chunks_sent))
 175                         header_len = 0;
 176         }
 177         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
 178         sendbuf = para_malloc(sendbuf_len);
 179         if (!current_chunk)
 180                 packet_type = ORTP_BOF;
 181         else if (header_len)
 182                 packet_type = ORTP_HEADER;
 183         WRITE_PACKET_TYPE(sendbuf, packet_type);
 184         WRITE_CHUNK_TIME(sendbuf, af->chunk_tv.tv_usec);
 185         WRITE_STREAM_TYPE(sendbuf, stream_type);
 186         WRITE_HEADER_LEN(sendbuf, header_len);
 187         if (header_len)
 188                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
 189                         header_len);
 190         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
 191         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
 192         free(sendbuf);
 193 }
 194
 195 static int ortp_com_on(struct sender_command_data *scd)
 196 {
 197
 198         self->status = SENDER_ON;
 199         return 1;
 200 }
 201
 202 static int ortp_com_off(struct sender_command_data *scd)
 203 {
 204         ortp_shutdown_targets();
 205         self->status = SENDER_OFF;
 206         return 1;
 207 }
 208
 209 static int ortp_com_delete(struct sender_command_data *scd)
 210 {
 211         char *a = para_strdup(inet_ntoa(scd->addr));
 212         struct ortp_target *ot, *tmp;
 213         list_for_each_entry_safe(ot, tmp, &targets, node) {
 214                 if (scd->port != ot->port)
 215                         continue;
 216                 if (strcmp(TARGET_ADDR(ot), a))
 217                         continue;
 218                 ortp_delete_target(ot, "com_delete");
 219         }
 220         return 1;
 221 }
 222
 223 static void ortp_add_target(int port, struct in_addr *addr)
 224 {
 225         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
 226         ot->port = port;
 227         ot->addr = *addr;
 228         PARA_INFO_LOG("adding to target list (%s:%d)\n",
 229                 TARGET_ADDR(ot), ot->port);
 230         list_add(&ot->node, &targets);
 231 }
 232
 233 static int ortp_com_add(struct sender_command_data *scd)
 234 {
 235         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
 236         ortp_add_target(port, &scd->addr);
 237         return 1;
 238 }
 239
 240 static char *ortp_info(void)
 241 {
 242         struct ortp_target *ot;
 243         char *ret, *tgts = NULL;
 244
 245         list_for_each_entry(ot, &targets, node) {
 246                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
 247                         TARGET_ADDR(ot), ot->port);
 248                 free(tgts);
 249                 tgts = tmp;
 250         }
 251         ret = make_message(
 252                 "ortp status: %s\n"
 253                 "ortp default port: udp %d\n"
 254                 "ortp targets: %s\n",
 255                 (self->status == SENDER_ON)? "on" : "off",
 256                 conf.ortp_default_port_arg,
 257                 tgts? tgts : "(none)"
 258         );
 259         free(tgts);
 260         return ret;
 261 }
 262
 263 static void ortp_init_target_list(void)
 264 {
 265         int i;
 266
 267         INIT_LIST_HEAD(&targets);
 268         for (i = 0; i < conf.ortp_target_given; i++) {
 269                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 270                 char *p = strchr(arg, ':');
 271                 int port;
 272                 struct in_addr addr;
 273
 274                 if (!p)
 275                         goto err;
 276                 *p = '\0';
 277                 if (!inet_aton(arg, &addr))
 278                         goto err;
 279                 port = atoi(++p);
 280                 if (port < 0 || port > 65535)
 281                         port = conf.ortp_default_port_arg;
 282                 ortp_add_target(port, &addr);
 283                 goto success;
 284 err:
 285                 PARA_CRIT_LOG("syntax error for ortp_target option "
 286                         "#%d, ignoring\n", i);
 287 success:
 288                 free(arg);
 289                 continue;
 290         }
 291 }
 292
 293 static void ortp_pre_select(struct audio_format *af, int *max_fileno,
 294                 fd_set *rfds, fd_set *wfds)
 295 {
 296         return;
 297 }
 298
 299 static char *ortp_help(void)
 300 {
 301         return make_message(
 302                 "usage: {on|off}\n"
 303                 "usage: {add|delete} IP port\n"
 304                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 305         );
 306 }
 307
 308 /**
 309  * the init function of para_server's ortp sender
 310  *
 311  * \param s pointer to the http sender struct
 312  *
 313  * It initializes all function pointers of \a s and the list of ortp targets.
 314  */
 315 void ortp_send_init(struct sender *s)
 316 {
 317         ortp_init();
 318         INIT_LIST_HEAD(&targets);
 319         s->info = ortp_info;
 320         s->help = ortp_help;
 321         s->send = ortp_send;
 322         s->pre_select = ortp_pre_select;
 323         s->post_select = NULL;
 324         s->shutdown_clients = ortp_shutdown_targets;
 325         s->client_cmds[SENDER_ON] = ortp_com_on;
 326         s->client_cmds[SENDER_OFF] = ortp_com_off;
 327         s->client_cmds[SENDER_DENY] = NULL;
 328         s->client_cmds[SENDER_ALLOW] = NULL;
 329         s->client_cmds[SENDER_ADD] = ortp_com_add;
 330         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 331         self = s;
 332         s->status = SENDER_OFF;
 333         ortp_init_target_list();
 334         if (!conf.ortp_no_autostart_given)
 335                 s->status = SENDER_ON;
 336         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
 337 }