remove GPL from the files to be converted by grutatxt
[paraslash.git] / 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 }