fbd4077e828e7e945fc8c0c4497e56f0dcacffa8
[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 int numtargets;
58 static struct list_head targets;
59 static struct sender *self;
60
61 static void ortp_delete_target(struct ortp_target *ot, const char *msg)
62 {
63         PARA_NOTICE_LOG("deleting %s:%d (%s) from list\n", TARGET_ADDR(ot),
64                 ot->port, msg);
65         if (ot->session) {
66                 rtp_session_destroy(ot->session);
67                 ot->session = NULL;
68         }
69         numtargets--;
70         list_del(&ot->node);
71         free(ot);
72 }
73
74 static void ortp_send_buf(char *buf, int len, long unsigned chunks_sent)
75 {
76         struct ortp_target *ot, *tmp;
77         int ret;
78
79         list_for_each_entry_safe(ot, tmp, &targets, node) {
80                 struct timeval now;
81                 int ts;
82                 gettimeofday(&now, NULL);
83                 if (!ot->session)
84                         continue;
85                 WRITE_CHUNK_TS(buf, ot->chunk_ts);
86                 ts = ot->chunk_ts * chunks_sent;
87                 ret = rtp_session_send_with_ts(ot->session, buf, len, ts);
88                 ot->last_ts = ts;
89                 if (ret < 0)
90                         ortp_delete_target(ot, "send error");
91                 if (ret != len +12)
92                         PARA_NOTICE_LOG("short write %d\n", ret);
93         }
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 //      rtp_session_set_jitter_compensation(ot->session, 100);
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, tv2ms(&af->chunk_tv));
163 //              PARA_DEBUG_LOG("len: %d, af: %p, ts: %d\n", len, af, ot->chunk_ts);
164                 ot->streaming = 1;
165         }
166         if (list_empty(&targets))
167                 return;
168         if (stream_type) {
169                 header_buf = af->get_header_info(&header_len);
170                 if (!need_extra_header(af, chunks_sent))
171                         header_len = 0;
172         }
173         sendbuf_len = ORTP_AUDIO_HEADER_LEN + header_len + len;
174         sendbuf = para_malloc(sendbuf_len);
175         if (!current_chunk)
176                 packet_type = ORTP_BOF;
177         else if (header_len)
178                 packet_type = ORTP_HEADER;
179         WRITE_PACKET_TYPE(sendbuf, packet_type);
180         WRITE_CHUNK_TIME(sendbuf, af->chunk_tv.tv_usec);
181         WRITE_STREAM_TYPE(sendbuf, stream_type);
182         WRITE_HEADER_LEN(sendbuf, header_len);
183         if (header_len)
184                 memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN, header_buf,
185                         header_len);
186         memcpy(sendbuf + ORTP_AUDIO_HEADER_LEN + header_len, buf, len);
187         ortp_send_buf(sendbuf, sendbuf_len, chunks_sent);
188         free(sendbuf);
189 }
190
191 static int ortp_com_on(struct sender_command_data *scd)
192 {
193
194         self->status = SENDER_ON;
195         return 1;
196 }
197
198 static int ortp_com_off(struct sender_command_data *scd)
199 {
200         ortp_shutdown_targets();
201         self->status = SENDER_OFF;
202         return 1;
203 }
204
205 static int ortp_com_delete(struct sender_command_data *scd)
206 {
207         char *a = para_strdup(inet_ntoa(scd->addr));
208         struct ortp_target *ot, *tmp;
209         list_for_each_entry_safe(ot, tmp, &targets, node) {
210                 if (scd->port != ot->port)
211                         continue;
212                 if (strcmp(TARGET_ADDR(ot), a))
213                         continue;
214                 ortp_delete_target(ot, "com_delete");
215         }
216         return 1;
217 }
218
219 static void ortp_add_target(int port, struct in_addr *addr)
220 {
221         struct ortp_target *ot = para_calloc(sizeof(struct ortp_target));
222         ot->port = port;
223         ot->addr = *addr;
224         PARA_INFO_LOG("adding to target list (%s:%d)\n",
225                 TARGET_ADDR(ot), ot->port);
226         list_add(&ot->node, &targets);
227 }
228
229 static int ortp_com_add(struct sender_command_data *scd)
230 {
231         int port = (scd->port > 0)? scd->port : conf.ortp_default_port_arg;
232         ortp_add_target(port, &scd->addr);
233         return 1;
234 }
235
236 static char *ortp_info(void)
237 {
238         struct ortp_target *ot;
239         char *ret, *tgts = NULL;
240
241         list_for_each_entry(ot, &targets, node) {
242                 char *tmp = make_message("%s%s:%d ", tgts? tgts : "",
243                         TARGET_ADDR(ot), ot->port);
244                 free(tgts);
245                 tgts = tmp;
246         }
247         ret = make_message(
248                 "ortp status: %s\n"
249                 "ortp default port: udp %d\n"
250                 "ortp targets: %s\n",
251                 (self->status == SENDER_ON)? "on" : "off",
252                 conf.ortp_default_port_arg,
253                 tgts? tgts : "(none)"
254         );
255         free(tgts);
256         return ret;
257 }
258
259 static void ortp_init_target_list(void)
260 {
261         int i;
262
263         INIT_LIST_HEAD(&targets);
264         for (i = 0; i < conf.ortp_target_given; i++) {
265                 char *arg = para_strdup(conf.ortp_target_arg[i]);
266                 char *p = strchr(arg, ':');
267                 int port;
268                 struct in_addr addr;
269
270                 if (!p)
271                         goto err;
272                 *p = '\0';
273                 if (!inet_aton(arg, &addr))
274                         goto err;
275                 port = atoi(++p);
276                 if (port < 0 || port > 65535)
277                         port = conf.ortp_default_port_arg;
278                 ortp_add_target(port, &addr);
279                 goto success;
280 err:
281                 PARA_CRIT_LOG("syntax error for ortp_target option "
282                         "#%d, ignoring\n", i);
283 success:
284                 free(arg);
285                 continue;
286         }
287 }
288
289 static void ortp_pre_select(struct audio_format *af, int *max_fileno,
290                 fd_set *rfds, fd_set *wfds)
291 {
292         return;
293 }
294
295 static char *ortp_help(void)
296 {
297         return make_message(
298                 "usage: {on|off}\n"
299                 "usage: {add|delete} IP port\n"
300                 "example: add 224.0.1.38 1500 (LAN-streaming)\n"
301         );
302 }
303
304 /**
305  * the init function of para_server's ortp sender
306  *
307  * \param s pointer to the http sender struct
308  *
309  * It initializes all function pointers of \a s and the list of ortp targets.
310  */
311 void ortp_send_init(struct sender *s)
312 {
313         ortp_init();
314         INIT_LIST_HEAD(&targets);
315         s->info = ortp_info;
316         s->help = ortp_help;
317         s->send = ortp_send;
318         s->pre_select = ortp_pre_select;
319         s->post_select = NULL;
320         s->shutdown_clients = ortp_shutdown_targets;
321         s->client_cmds[SENDER_ON] = ortp_com_on;
322         s->client_cmds[SENDER_OFF] = ortp_com_off;
323         s->client_cmds[SENDER_DENY] = NULL;
324         s->client_cmds[SENDER_ALLOW] = NULL;
325         s->client_cmds[SENDER_ADD] = ortp_com_add;
326         s->client_cmds[SENDER_DELETE] = ortp_com_delete;
327         self = s;
328         s->status = SENDER_OFF;
329         ortp_init_target_list();
330         if (!conf.ortp_no_autostart_given)
331                 s->status = SENDER_ON;
332         PARA_DEBUG_LOG("%s", "ortp sender init complete\n");
333 }