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                 int ts;
  79                 if (!ot->session)
  80                         continue;
  81                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
  82                 ts = ot->chunk_ts * chunks_sent;
  83                 ret = rtp_session_send_with_ts(ot->session, buf, len, ts);
  84                 ot->last_ts = ts;
  85                 if (ret < 0)
  86                         ortp_delete_target(ot, "send error");
  87                 if (ret != len +12)
  88                         PARA_NOTICE_LOG("short write %d\n", ret);
  89         }
  90 }
  91
  92 static void ortp_init_session(struct ortp_target *ot)
  93 {
  94         RtpSession *s;
  95         int ret;
  96
  97         PARA_NOTICE_LOG("sending to udp %s:%d\n", TARGET_ADDR(ot), ot->port);
  98         ot->session = rtp_session_new(RTP_SESSION_SENDONLY);
  99         if (!ot->session)
 100                 return;
 101         s = ot->session;
 102         if (conf.ortp_jitter_compensation_arg) {
 103                 rtp_session_enable_adaptive_jitter_compensation(ot->session, TRUE);
 104                 rtp_session_set_jitter_compensation(ot->session,
 105                         conf.ortp_jitter_compensation_arg);
 106         }
 107         /* always successful */
 108         rtp_session_set_send_payload_type(s, PAYLOAD_AUDIO_CONTINUOUS);
 109         ret = rtp_session_set_remote_addr(s, TARGET_ADDR(ot), ot->port);
 110         if (ret < 0) {
 111                 rtp_session_destroy(ot->session);
 112                 ot->session = NULL;
 113         }
 114 }
 115
 116 /* called by afs */
 117 static void ortp_shutdown_targets(void)
 118 {
 119         char buf[2];
 120         struct ortp_target *ot, *tmp;
 121
 122         buf[0] = ORTP_EOF;
 123         list_for_each_entry_safe(ot, tmp, &targets, node) {
 124                 if (!ot->session || !ot->streaming)
 125                         continue;
 126                 PARA_INFO_LOG("sending eof to ortp target %s:%d, ts = %d\n", TARGET_ADDR(ot), ot->port,
 127                         ot->last_ts);
 128                 rtp_session_send_with_ts(ot->session, buf, 1, ot->last_ts);
 129                 ot->streaming = 0;
 130                 ot->chunk_ts = 0;
 131                 rtp_session_reset(ot->session);
 132         }
 133 }
 134
 135 static int need_extra_header(struct audio_format *af, long unsigned chunks_sent)
 136 {
 137         /* FIXME: No need to compute this on every run */
 138         int mod = conf.ortp_header_interval_arg / (tv2ms(&af->chunk_tv) + 1);
 139         if (mod && (chunks_sent % mod))
 140                 return 0;
 141         return 1;
 142 }
 143
 144 static void ortp_send(struct audio_format *af, long unsigned current_chunk,
 145                 long unsigned chunks_sent, const char *buf, size_t len)
 146 {
 147         struct ortp_target *ot, *tmp;
 148         size_t sendbuf_len;
 149         int header_len = 0;
 150         int packet_type = ORTP_DATA, stream_type = af && af->get_header_info; /* header stream? */
 151         char *sendbuf, *header_buf = NULL;
 152
 153         if (self->status != SENDER_ON)
 154                 return;
 155         list_for_each_entry_safe(ot, tmp, &targets, node) {
 156                 if (!ot->session) {
 157                         ortp_init_session(ot);
 158                         if (!ot->session)
 159                                 continue;
 160                 }
 161                 if (!ot->chunk_ts)
 162                         ot->chunk_ts = rtp_session_time_to_ts(ot->session,
 163                                 tv2ms(&af->chunk_tv));
 164 //              PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
 165 //                      len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
 166                 ot->streaming = 1;
 167         }
 168         if (list_empty(&targets))
 169                 return;
 170         if (stream_type) {
 171                 header_buf = af->get_header_info(&header_len);
 172                 if (!need_extra_header(af, chunks_sent))
 173                         header_len = 0;
 174         }
 175         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
 176         sendbuf = para_malloc(sendbuf_len);
 177         if (!current_chunk)
 178                 packet_type = ORTP_BOF;
 179         else if (header_len)
 180                 packet_type = ORTP_HEADER;
 181         WRITE_PACKET_TYPE(sendbuf, packet_type);
 182         WRITE_CHUNK_TIME(sendbuf, af->chunk_tv.tv_usec);
 183         WRITE_STREAM_TYPE(sendbuf, stream_type);
 184         WRITE_HEADER_LEN(sendbuf, header_len);
 185         if (header_len)
 186                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
 187                         header_len);
 188         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
 189         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
 190         free(sendbuf);
 191 }
 192
 193 static int ortp_com_on(__a_unused struct sender_command_data *scd)
 194 {
 195
 196         self->status = SENDER_ON;
 197         return 1;
 198 }
 199
 200 static int ortp_com_off(__a_unused struct sender_command_data *scd)
 201 {
 202         ortp_shutdown_targets();
 203         self->status = SENDER_OFF;
 204         return 1;
 205 }
 206
 207 static int ortp_com_delete(struct sender_command_data *scd)
 208 {
 209         char *a = para_strdup(inet_ntoa(scd->addr));
 210         struct ortp_target *ot, *tmp;
 211         list_for_each_entry_safe(ot, tmp, &targets, node) {
 212                 if (scd->port != ot->port)
 213                         continue;
 214                 if (strcmp(TARGET_ADDR(ot), a))
 215                         continue;
 216                 ortp_delete_target(ot, "com_delete");
 217         }
 218         return 1;
 219 }
 220
 221 static void ortp_add_target(int port, struct in_addr *addr)
 222 {
 223         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
 224         ot->port = port;
 225         ot->addr = *addr;
 226         PARA_INFO_LOG("adding to target list (%s:%d)\n",
 227                 TARGET_ADDR(ot), ot->port);
 228         list_add(&ot->node, &targets);
 229 }
 230
 231 static int ortp_com_add(struct sender_command_data *scd)
 232 {
 233         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
 234         ortp_add_target(port, &scd->addr);
 235         return 1;
 236 }
 237
 238 static char *ortp_info(void)
 239 {
 240         struct ortp_target *ot;
 241         char *ret, *tgts = NULL;
 242
 243         list_for_each_entry(ot, &targets, node) {
 244                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
 245                         TARGET_ADDR(ot), ot->port);
 246                 free(tgts);
 247                 tgts = tmp;
 248         }
 249         ret = make_message(
 250                 "ortp status: %s\n"
 251                 "ortp default port: udp %d\n"
 252                 "ortp targets: %s\n",
 253                 (self->status == SENDER_ON)? "on" : "off",
 254                 conf.ortp_default_port_arg,
 255                 tgts? tgts : "(none)"
 256         );
 257         free(tgts);
 258         return ret;
 259 }
 260
 261 static void ortp_init_target_list(void)
 262 {
 263         int i;
 264
 265         INIT_LIST_HEAD(&targets);
 266         for (i = 0; i < conf.ortp_target_given; i++) {
 267                 char *arg = para_strdup(conf.ortp_target_arg[i]);
 268                 char *p = strchr(arg, ':');
 269                 int port;
 270                 struct in_addr addr;
 271
 272                 if (!p)
 273                         goto err;
 274                 *p = '\0';
 275                 if (!inet_aton(arg, &addr))
 276                         goto err;
 277                 port = atoi(++p);
 278                 if (port < 0 || port > 65535)
 279                         port = conf.ortp_default_port_arg;
 280                 ortp_add_target(port, &addr);
 281                 goto success;
 282 err:
 283                 PARA_CRIT_LOG("syntax error for ortp_target option "
 284                         "#%d, ignoring\n", i);
 285 success:
 286                 free(arg);
 287                 continue;
 288         }
 289 }
 290
 291 static void ortp_pre_select(__a_unused struct audio_format *af,
 292         __a_unused  int *max_fileno, __a_unused fd_set *rfds,
 293         __a_unused fd_set *wfds)
 294 {
 295         return;
 296 }
 297
 298 static char *ortp_help(void)
 299 {
 300         return make_message(
 301                 "usage: {on|off}\n"
 302                 "usage: {add|delete} IP port\n"
 303                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
 304         );
 305 }
 306
 307 /**
 308  * the init function of para_server's ortp sender
 309  *
 310  * \param s pointer to the http sender struct
 311  *
 312  * It initializes all function pointers of \a s and the list of ortp targets.
 313  */
 314 void ortp_send_init(struct sender *s)
 315 {
 316         ortp_init();
 317         INIT_LIST_HEAD(&targets);
 318         s->info = ortp_info;
 319         s->help = ortp_help;
 320         s->send = ortp_send;
 321         s->pre_select = ortp_pre_select;
 322         s->post_select = NULL;
 323         s->shutdown_clients = ortp_shutdown_targets;
 324         s->client_cmds[SENDER_ON] = ortp_com_on;
 325         s->client_cmds[SENDER_OFF] = ortp_com_off;
 326         s->client_cmds[SENDER_DENY] = NULL;
 327         s->client_cmds[SENDER_ALLOW] = NULL;
 328         s->client_cmds[SENDER_ADD] = ortp_com_add;
 329         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
 330         self = s;
 331         s->status = SENDER_OFF;
 332         ortp_init_target_list();
 333         if (!conf.ortp_no_autostart_given)
 334                 s->status = SENDER_ON;
 335         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
 336 }