audiod: kill close_writer()
[paraslash.git] / ortp_recv.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 /** \file ortp_recv.c paraslash's ortp receiver */
19
20 #include <ortp/ortp.h>
21 #include "para.h"
22
23 #include "ortp.h"
24 #include "list.h"
25 #include "sched.h"
26 #include "recv.h"
27 #include "ortp_recv.cmdline.h"
28
29 #include "error.h"
30 #include "audiod.h"
31 #include "string.h"
32
33 #define CHUNK_SIZE 128 * 1024
34
35 extern int msg_to_buf(mblk_t *, char *, int);
36
37 /**
38 * data specific to the ortp receiver
39 *
40 * \sa receiver receiver_node
41 */
42 struct private_ortp_recv_data {
43
44 /**
45 *
46 *
47 * whether a header was received
48 *
49 * A flag indicating whether the ortp receiver already received a packet which
50 * contains the audio file header.
51 *
52 * This flag has no effect if the audio stream indicates that no extra headers
53 * will be sent (mp3). Otherwise, all data packets are dropped until the
54 * header is received.
55 */
56 int have_header;
57 /** the ortp session this instance of the receiver belongs to */
58 RtpSession *session;
59 /** the time the first data or header packet was received */
60 struct timeval start;
61 /** ETA of the next chunk */
62 struct timeval next_chunk;
63 /** number of consecutive bad chunks */
64 int c_bad;
65 /** the current timestamp which is passed to the receiving function of libortp */
66 uint32_t timestamp;
67 /** \a timestamp increases by this amount */
68 uint32_t chunk_ts;
69 };
70
71 static void ortp_recv_pre_select(struct sched *s, struct task *t)
72 {
73 struct receiver_node *rn = t->private_data;
74 struct private_ortp_recv_data *pord = rn->private_data;
75 struct timeval tmp;
76
77 if (tv_diff(&s->now, &pord->next_chunk, &tmp) >= 0) {
78 tmp.tv_sec = 0;
79 tmp.tv_usec = 1000;
80 }
81 if (tv_diff(&s->timeout, &tmp, NULL) > 0)
82 s->timeout = tmp;
83 t->ret = 1;
84 }
85
86 static void compute_next_chunk(unsigned chunk_time,
87 struct private_ortp_recv_data *pord)
88 {
89 struct timeval chunk_tv = {0, chunk_time};
90 struct timeval tmp;
91
92 tv_add(&chunk_tv, &pord->next_chunk, &tmp);
93 pord->next_chunk = tmp;
94 pord->timestamp += pord->chunk_ts;
95 PARA_DEBUG_LOG("next chunk (ts = %d) due at %lu:%lu\n",
96 pord->timestamp, pord->next_chunk.tv_sec,
97 pord->next_chunk.tv_usec);
98 }
99
100 static void ortp_recv_post_select(struct sched *s, struct task *t)
101 {
102 struct receiver_node *rn = t->private_data;
103 struct private_ortp_recv_data *pord = rn->private_data;
104 mblk_t *mp;
105 int packet_type, stream_type;
106 char tmpbuf[CHUNK_SIZE + 3];
107 unsigned chunk_time;
108
109 // PARA_DEBUG_LOG("rn: %p, pord: %p, session: %p\n", rn, pord, pord->session);
110 t->ret = 1;
111 if (pord->start.tv_sec)
112 if (tv_diff(&s->now, &pord->next_chunk, NULL) < 0)
113 return;
114 mp = rtp_session_recvm_with_ts(pord->session, pord->timestamp);
115 if (!mp) {
116 struct timeval min_delay = {0, 100};
117 // PARA_INFO_LOG("nope, chunk_ts = %d, loaded: %d, bad: %d\n",
118 // pord->timestamp, rn->loaded, pord->c_bad);
119 pord->c_bad++;
120 t->ret = -E_TOO_MANY_BAD_CHUNKS;
121 if ((pord->c_bad > 5000 && pord->start.tv_sec) || pord->c_bad > 10000)
122 return;
123 t->ret = 1;
124 tv_add(&s->now, &min_delay, &pord->next_chunk);
125 return;
126 }
127 /* okay, we have a chunk of data */
128 if (!pord->start.tv_sec)
129 pord->start = s->now;
130 t->ret = msg_to_buf(mp, tmpbuf, CHUNK_SIZE);
131 if (t->ret < ORTP_AUDIO_HEADER_LEN) {
132 rn->eof = 1;
133 if (t->ret < 0)
134 t->ret = -E_MSG_TO_BUF;
135 else
136 t->ret = -E_ORTP_RECV_EOF;
137 goto err_out;
138 }
139 packet_type = READ_PACKET_TYPE(tmpbuf);
140 stream_type = READ_STREAM_TYPE(tmpbuf);
141 chunk_time = READ_CHUNK_TIME(tmpbuf);
142 pord->chunk_ts = READ_CHUNK_TS(tmpbuf);
143 // PARA_INFO_LOG("packet type: %d, stream type: %d, chunk time: %u,"
144 // " chunk_ts: %u, loaded: %u, bad: %d\n", packet_type,
145 // stream_type, chunk_time, pord->chunk_ts, rn->loaded, pord->c_bad);
146 switch (packet_type) {
147 unsigned header_len, payload_len;
148 case ORTP_EOF:
149 rn->eof = 1;
150 t->ret = -E_ORTP_RECV_EOF;
151 goto err_out;
152 case ORTP_BOF:
153 PARA_INFO_LOG("bof (%d)\n", t->ret);
154 pord->have_header = 1;
155 /* fall through */
156 case ORTP_DATA:
157 if (!pord->have_header && stream_type)
158 /* can't use the data, wait for header */
159 goto success;
160 if (t->ret + rn->loaded >= CHUNK_SIZE + ORTP_AUDIO_HEADER_LEN) {
161 t->ret = -E_OVERRUN;
162 goto err_out;
163 }
164 if (t->ret > ORTP_AUDIO_HEADER_LEN) {
165 memcpy(rn->buf + rn->loaded, tmpbuf + ORTP_AUDIO_HEADER_LEN,
166 t->ret - ORTP_AUDIO_HEADER_LEN);
167 rn->loaded += t->ret - ORTP_AUDIO_HEADER_LEN;
168 }
169 goto success;
170 case ORTP_HEADER:
171 header_len = READ_HEADER_LEN(tmpbuf);
172 PARA_DEBUG_LOG("header packet (%d bytes), header len: %d\n",
173 t->ret, header_len);
174 if (!pord->have_header) {
175 pord->have_header = 1;
176 memcpy(rn->buf, tmpbuf + ORTP_AUDIO_HEADER_LEN,
177 t->ret - ORTP_AUDIO_HEADER_LEN);
178 rn->loaded = t->ret - ORTP_AUDIO_HEADER_LEN;
179 goto success;
180 }
181 if (header_len + ORTP_AUDIO_HEADER_LEN > t->ret) {
182 t->ret = -E_INVALID_HEADER;
183 goto err_out;
184 }
185 payload_len = t->ret - ORTP_AUDIO_HEADER_LEN - header_len;
186 // PARA_INFO_LOG("len: %d header_len: %d, payload_len: %d, loaded: %d\n", ret,
187 // header_len, payload_len, rn->loaded);
188 if (rn->loaded + payload_len > CHUNK_SIZE) {
189 t->ret = -E_OVERRUN;
190 goto err_out;
191 }
192 if (payload_len)
193 memcpy(rn->buf + rn->loaded, tmpbuf
194 + (t->ret - payload_len), payload_len);
195 rn->loaded += payload_len;
196 goto success;
197 }
198 success:
199 t->ret = 1;
200 freemsg(mp);
201 if (pord->c_bad) {
202 pord->c_bad = 0;
203 pord->next_chunk = s->now;
204 }
205 compute_next_chunk(chunk_time, pord);
206 return;
207 err_out:
208 freemsg(mp);
209 return;
210 }
211
212 static void ortp_shutdown(void)
213 {
214 // ortp_global_stats_display();
215 ortp_exit();
216 }
217
218 static void ortp_recv_close(struct receiver_node *rn)
219 {
220 struct private_ortp_recv_data *pord = rn->private_data;
221
222 rtp_session_destroy(pord->session);
223 free(rn->private_data);
224 free(rn->buf);
225 }
226
227 static void *ortp_recv_parse_config(int argc, char **argv)
228 {
229 int ret;
230
231 struct ortp_recv_args_info *tmp = para_calloc(sizeof(struct ortp_recv_args_info));
232
233 ret = ortp_recv_cmdline_parser(argc, argv, tmp)? -E_ORTP_SYNTAX : 1;
234 if (ret > 0)
235 return tmp;
236 free(tmp);
237 return NULL;
238 }
239
240 static int ortp_recv_open(struct receiver_node *rn)
241 {
242 struct private_ortp_recv_data *pord;
243 struct ortp_recv_args_info *conf = rn->conf;
244
245 rn->buf = para_calloc(CHUNK_SIZE);
246
247 rn->private_data = para_calloc(sizeof(struct private_ortp_recv_data));
248 pord = rn->private_data;
249 pord->session = rtp_session_new(RTP_SESSION_RECVONLY);
250 PARA_NOTICE_LOG("receiving from %s:%d\n", conf->host_arg, conf->port_arg);
251 rtp_session_set_local_addr(pord->session, conf->host_arg, conf->port_arg);
252 rtp_session_set_payload_type(pord->session, PAYLOAD_AUDIO_CONTINUOUS);
253 if (conf->jitter_compensation_arg) {
254 rtp_session_enable_adaptive_jitter_compensation(pord->session, TRUE);
255 rtp_session_set_jitter_compensation(pord->session,
256 conf->jitter_compensation_arg);
257 }
258 return 1;
259 }
260
261 /**
262 * the init function of the ortp receiver
263 *
264 * \param r pointer to the receiver struct to initialize
265 *
266 * Initialize all function pointers of \a r and call libortp's ortp_init().
267 */
268 void ortp_recv_init(struct receiver *r)
269 {
270 r->shutdown = ortp_shutdown;
271 r->open = ortp_recv_open;
272 r->close = ortp_recv_close;
273 r->pre_select = ortp_recv_pre_select;
274 r->post_select = ortp_recv_post_select;
275 r->parse_config = ortp_recv_parse_config;
276
277 ortp_init();
278 }