new codename, reset version to git
[paraslash.git] / 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[ORTP_AUDIO_HEADER_LEN];
120 struct ortp_target *ot, *tmp;
121
122 WRITE_PACKET_TYPE(buf, 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",
127 TARGET_ADDR(ot), ot->port, ot->last_ts);
128 rtp_session_send_with_ts(ot->session, buf,
129 ORTP_AUDIO_HEADER_LEN, ot->last_ts);
130 ot->streaming = 0;
131 ot->chunk_ts = 0;
132 rtp_session_reset(ot->session);
133 }
134 }
135
136 static int need_extra_header(struct audio_format *af, long unsigned chunks_sent)
137 {
138 /* FIXME: No need to compute this on every run */
139 int mod = conf.ortp_header_interval_arg / (tv2ms(&af->chunk_tv) + 1);
140 if (mod && (chunks_sent % mod))
141 return 0;
142 return 1;
143 }
144
145 static void ortp_send(struct audio_format *af, long unsigned current_chunk,
146 long unsigned chunks_sent, const char *buf, size_t len)
147 {
148 struct ortp_target *ot, *tmp;
149 size_t sendbuf_len;
150 int header_len = 0;
151 int packet_type = ORTP_DATA, stream_type = af && af->get_header_info; /* header stream? */
152 char *sendbuf, *header_buf = NULL;
153
154 if (self->status != SENDER_ON)
155 return;
156 list_for_each_entry_safe(ot, tmp, &targets, node) {
157 if (!ot->session) {
158 ortp_init_session(ot);
159 if (!ot->session)
160 continue;
161 }
162 if (!ot->chunk_ts)
163 ot->chunk_ts = rtp_session_time_to_ts(ot->session,
164 tv2ms(&af->chunk_tv));
165 // PARA_DEBUG_LOG("len: %d, ts: %lu, ts: %d\n",
166 // len, ot->chunk_ts * chunks_sent, ot->chunk_ts);
167 ot->streaming = 1;
168 }
169 if (list_empty(&targets))
170 return;
171 if (stream_type) {
172 header_buf = af->get_header_info(&header_len);
173 if (!need_extra_header(af, chunks_sent))
174 header_len = 0;
175 }
176 sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
177 sendbuf = para_malloc(sendbuf_len);
178 if (!current_chunk)
179 packet_type = ORTP_BOF;
180 else if (header_len)
181 packet_type = ORTP_HEADER;
182 WRITE_PACKET_TYPE(sendbuf, packet_type);
183 WRITE_CHUNK_TIME(sendbuf, af->chunk_tv.tv_usec);
184 WRITE_STREAM_TYPE(sendbuf, stream_type);
185 WRITE_HEADER_LEN(sendbuf, header_len);
186 if (header_len)
187 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
188 header_len);
189 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
190 ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
191 free(sendbuf);
192 }
193
194 static int ortp_com_on(__a_unused struct sender_command_data *scd)
195 {
196
197 self->status = SENDER_ON;
198 return 1;
199 }
200
201 static int ortp_com_off(__a_unused struct sender_command_data *scd)
202 {
203 ortp_shutdown_targets();
204 self->status = SENDER_OFF;
205 return 1;
206 }
207
208 static int ortp_com_delete(struct sender_command_data *scd)
209 {
210 char *a = para_strdup(inet_ntoa(scd->addr));
211 struct ortp_target *ot, *tmp;
212 list_for_each_entry_safe(ot, tmp, &targets, node) {
213 if (scd->port != ot->port)
214 continue;
215 if (strcmp(TARGET_ADDR(ot), a))
216 continue;
217 ortp_delete_target(ot, "com_delete");
218 }
219 return 1;
220 }
221
222 static void ortp_add_target(int port, struct in_addr *addr)
223 {
224 struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
225 ot->port = port;
226 ot->addr = *addr;
227 PARA_INFO_LOG("adding to target list (%s:%d)\n",
228 TARGET_ADDR(ot), ot->port);
229 list_add(&ot->node, &targets);
230 }
231
232 static int ortp_com_add(struct sender_command_data *scd)
233 {
234 int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
235 ortp_add_target(port, &scd->addr);
236 return 1;
237 }
238
239 static char *ortp_info(void)
240 {
241 struct ortp_target *ot;
242 char *ret, *tgts = NULL;
243
244 list_for_each_entry(ot, &targets, node) {
245 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
246 TARGET_ADDR(ot), ot->port);
247 free(tgts);
248 tgts = tmp;
249 }
250 ret = make_message(
251 "ortp status: %s\n"
252 "ortp default port: udp %d\n"
253 "ortp targets: %s\n",
254 (self->status == SENDER_ON)? "on" : "off",
255 conf.ortp_default_port_arg,
256 tgts? tgts : "(none)"
257 );
258 free(tgts);
259 return ret;
260 }
261
262 static void ortp_init_target_list(void)
263 {
264 int i;
265
266 INIT_LIST_HEAD(&targets);
267 for (i = 0; i < conf.ortp_target_given; i++) {
268 char *arg = para_strdup(conf.ortp_target_arg[i]);
269 char *p = strchr(arg, ':');
270 int port;
271 struct in_addr addr;
272
273 if (!p)
274 goto err;
275 *p = '\0';
276 if (!inet_aton(arg, &addr))
277 goto err;
278 port = atoi(++p);
279 if (port < 0 || port > 65535)
280 port = conf.ortp_default_port_arg;
281 ortp_add_target(port, &addr);
282 goto success;
283 err:
284 PARA_CRIT_LOG("syntax error for ortp_target option "
285 "#%d, ignoring\n", i);
286 success:
287 free(arg);
288 continue;
289 }
290 }
291
292 static void ortp_pre_select(__a_unused struct audio_format *af,
293 __a_unused int *max_fileno, __a_unused fd_set *rfds,
294 __a_unused 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 }