2 * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
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.
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.
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.
18 /** \file ortp_recv.c paraslash's ortp receiver */
21 #include <ortp/ortp.h>
25 #include "ortp_recv.cmdline.h"
31 #define CHUNK_SIZE 128 * 1024
33 extern gint msg_to_buf(mblk_t *, char *, gint);
36 * data specific to the ortp receiver
38 * \sa receiver receiver_node
40 struct private_ortp_recv_data {
45 * whether a header was received
47 * A flag indicating whether the ortp receiver already received a packet which
48 * contains the audio file header.
50 * This flag has no effect if the audio stream indicates that no extra headers
51 * will be sent (mp3). Otherwise, all data packets are dropped until the
55 /** the ortp session this instance of the receiver belongs to */
57 /** the time the first data or header packet was received */
59 /** ETA of the next chunk */
60 struct timeval next_chunk;
61 /** number of consecutive bad chunks */
63 /** the current timestamp which is passed to the receiving function of libortp */
65 /** \a timestamp increases by this amount */
70 static void recalc_timestamp(struct receiver_node *rn)
72 struct timeval now, tmp, min_delay = {0, 5000};
73 struct private_ortp_recv_data *pord = rn->private_data;
75 gettimeofday(&now, NULL);
76 tv_add(&now, &min_delay, &pord->next_chunk);
77 if (pord->start.tv_sec) {
80 tv_diff(&now, &pord->start, &tmp);
81 new_ts = rtp_session_time_to_ts(pord->session, tv2ms(&tmp));
82 // if (pord->c_bad > 50)
83 pord->timestamp = new_ts;
86 PARA_DEBUG_LOG("ts=%u, c_bad = %d\n", pord->timestamp, pord->c_bad);
91 static int ortp_recv_pre_select(struct receiver_node *rn,
92 __unused fd_set *rfds, __unused fd_set *wfds,
93 struct timeval *timeout)
95 struct private_ortp_recv_data *pord = rn->private_data;
96 struct timeval now, tmp;
98 gettimeofday(&now, NULL);
99 if (tv_diff(&now, &pord->next_chunk, &tmp) >= 0) {
103 if (tv_diff(timeout, &tmp, NULL) > 0)
105 return -1; /* we did not modify the fd sets */
108 static void compute_next_chunk(struct timeval *now, unsigned chunk_time,
109 struct private_ortp_recv_data *pord)
111 struct timeval chunk_tv = {0, chunk_time};
112 // if (!pord->start.tv_sec) {
113 // pord->start = *now;
114 // tv_add(&chunk_tv, now, &pord->next_chunk);
118 tv_add(&chunk_tv, &pord->next_chunk, &tmp);
119 pord->next_chunk = tmp;
121 pord->timestamp += pord->chunk_ts;
122 PARA_DEBUG_LOG("next chunk (ts = %d) due at %lu:%lu\n",
123 pord->timestamp, pord->next_chunk.tv_sec,
124 pord->next_chunk.tv_usec);
127 #define BUF_TO_VAL(buf) (((unsigned)(buf)[1] & 0xff) + 256 * ((unsigned)(buf)[0] & 0xff))
131 static int ortp_recv_post_select(struct receiver_node *rn, int select_ret,
132 __unused fd_set *rfds, __unused fd_set *wfds)
134 struct private_ortp_recv_data *pord = rn->private_data;
136 int ret, packet_type, stream_type;
137 char tmpbuf[CHUNK_SIZE + 3];
141 gettimeofday(&now, NULL);
142 PARA_DEBUG_LOG("rn: %p, pord: %p, session: %p\n", rn, pord, pord->session);
143 if (pord->start.tv_sec) {
145 if (tv_diff(&now, &pord->next_chunk, &diff) < 0) {
146 long unsigned diff_ms = tv2ms(&diff);
148 PARA_DEBUG_LOG("too early: %lu ms left\n",
154 mp = rtp_session_recvm_with_ts(pord->session, pord->timestamp);
157 if ((pord->c_bad > 500 && pord->start.tv_sec) || pord->c_bad > 10000)
158 return -E_TOO_MANY_BAD_CHUNKS;
159 // PARA_NOTICE_LOG("did not receive buffer, ts=%u, c_bad = %d, to = %lu\n",
160 // pord->timestamp, pord->c_bad, tv2ms(&tmp));
161 if (pord->c_bad > 100)
162 recalc_timestamp(rn);
165 /* okay, we have a chunk of data */
166 PARA_DEBUG_LOG("have it ts = %d, chunk_ts = %d, loaded: %d, bad: %d\n",
167 pord->timestamp, pord->chunk_ts, rn->loaded, pord->c_bad);
168 if (!pord->start.tv_sec)
170 ret = msg_to_buf(mp, tmpbuf, CHUNK_SIZE);
171 if (ret < ORTP_AUDIO_HEADER_LEN) {
178 packet_type = READ_PACKET_TYPE(tmpbuf);
179 stream_type = READ_STREAM_TYPE(tmpbuf);
180 chunk_time = READ_CHUNK_TIME(tmpbuf);
181 pord->chunk_ts = READ_CHUNK_TS(tmpbuf);
182 PARA_DEBUG_LOG("packet type: %d, stream type: %d, chunk time: %u, chunk_ts: %u\n", packet_type,
183 stream_type, chunk_time, pord->chunk_ts);
184 switch (packet_type) {
185 unsigned header_len, payload_len;
190 PARA_INFO_LOG("bof (%d)\n", ret);
191 pord->have_header = 1;
194 if (!pord->have_header && stream_type) /* can't use the data, wait for header */
196 if (ret + rn->loaded >= CHUNK_SIZE + ORTP_AUDIO_HEADER_LEN) {
200 if (ret > ORTP_AUDIO_HEADER_LEN) {
201 memcpy(rn->buf + rn->loaded, tmpbuf + ORTP_AUDIO_HEADER_LEN,
202 ret - ORTP_AUDIO_HEADER_LEN);
203 rn->loaded += ret - ORTP_AUDIO_HEADER_LEN;
207 header_len = READ_HEADER_LEN(tmpbuf);
208 PARA_DEBUG_LOG("header packet (%d bytes), header len: %d\n", ret, header_len);
209 if (!pord->have_header) {
210 pord->have_header = 1;
211 memcpy(rn->buf, tmpbuf + ORTP_AUDIO_HEADER_LEN,
212 ret - ORTP_AUDIO_HEADER_LEN);
213 rn->loaded = ret - ORTP_AUDIO_HEADER_LEN;
216 if (header_len + ORTP_AUDIO_HEADER_LEN > ret) {
217 ret = -E_INVALID_HEADER;
220 payload_len = ret - ORTP_AUDIO_HEADER_LEN - header_len;
221 // PARA_INFO_LOG("len: %d header_len: %d, payload_len: %d, loaded: %d\n", ret,
222 // header_len, payload_len, rn->loaded);
223 if (rn->loaded + payload_len > CHUNK_SIZE) {
228 memcpy(rn->buf + rn->loaded, tmpbuf
229 + (ret - payload_len), payload_len);
230 rn->loaded += payload_len;
236 compute_next_chunk(&now, chunk_time, pord);
243 static void ortp_shutdown(void)
245 // ortp_global_stats_display();
249 static void ortp_recv_close(struct receiver_node *rn)
251 struct private_ortp_recv_data *pord = rn->private_data;
253 rtp_session_destroy(pord->session);
254 free(rn->private_data);
258 static void *ortp_recv_parse_config(int argc, char **argv)
262 struct gengetopt_args_info *tmp = para_calloc(sizeof(struct gengetopt_args_info));
264 ret = ortp_recv_cmdline_parser(argc, argv, tmp)? -E_ORTP_SYNTAX : 1;
271 static int ortp_recv_open(struct receiver_node *rn)
273 struct private_ortp_recv_data *pord;
274 struct gengetopt_args_info *conf = rn->conf;
276 rn->buf = para_calloc(CHUNK_SIZE);
278 rn->private_data = para_calloc(sizeof(struct private_ortp_recv_data));
279 pord = rn->private_data;
280 pord->session = rtp_session_new(RTP_SESSION_RECVONLY);
281 PARA_NOTICE_LOG("receiving from %s:%d\n", conf->host_arg, conf->port_arg);
282 rtp_session_set_local_addr(pord->session, conf->host_arg, conf->port_arg);
283 rtp_session_set_payload_type(pord->session, PAYLOAD_AUDIO_CONTINUOUS);
288 * the init function of the ortp receiver
290 * \param r pointer to the receiver struct to initialize
292 * Initialize all function pointers of \a r and call libortp's ortp_init().
294 void ortp_recv_init(struct receiver *r)
296 r->shutdown = ortp_shutdown;
297 r->open = ortp_recv_open;
298 r->close = ortp_recv_close;
299 r->pre_select = ortp_recv_pre_select;
300 r->post_select = ortp_recv_post_select;
301 r->parse_config = ortp_recv_parse_config;
304 ortp_set_debug_file("oRTP", NULL);