87e2d25bd7dcc57f8cdf20dd7509fb896489c9c1
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 */
20 #include <ortp/ortp.h>
25 #include "ortp_recv.cmdline.h"
31 #define CHUNK_SIZE 128 * 1024
33 extern int msg_to_buf(mblk_t
*, char *, int);
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 */
69 static int ortp_recv_pre_select(struct receiver_node
*rn
,
70 __a_unused fd_set
*rfds
, __a_unused fd_set
*wfds
,
71 struct timeval
*timeout
)
73 struct private_ortp_recv_data
*pord
= rn
->private_data
;
74 struct timeval now
, tmp
;
76 gettimeofday(&now
, NULL
);
77 if (tv_diff(&now
, &pord
->next_chunk
, &tmp
) >= 0) {
81 if (tv_diff(timeout
, &tmp
, NULL
) > 0)
83 return -1; /* we did not modify the fd sets */
86 static void compute_next_chunk(struct timeval
*now
, unsigned chunk_time
,
87 struct private_ortp_recv_data
*pord
)
89 struct timeval chunk_tv
= {0, chunk_time
};
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
);
100 static int ortp_recv_post_select(struct receiver_node
*rn
, int select_ret
,
101 __a_unused fd_set
*rfds
, __a_unused fd_set
*wfds
)
103 struct private_ortp_recv_data
*pord
= rn
->private_data
;
105 int ret
, packet_type
, stream_type
;
106 char tmpbuf
[CHUNK_SIZE
+ 3];
110 gettimeofday(&now
, NULL
);
111 // PARA_DEBUG_LOG("rn: %p, pord: %p, session: %p\n", rn, pord, pord->session);
112 if (pord
->start
.tv_sec
) {
114 if (tv_diff(&now
, &pord
->next_chunk
, &diff
) < 0)
117 mp
= rtp_session_recvm_with_ts(pord
->session
, pord
->timestamp
);
119 struct timeval min_delay
= {0, 100};
120 // PARA_INFO_LOG("nope, chunk_ts = %d, loaded: %d, bad: %d\n",
121 // pord->timestamp, rn->loaded, pord->c_bad);
123 if ((pord
->c_bad
> 5000 && pord
->start
.tv_sec
) || pord
->c_bad
> 10000)
124 return -E_TOO_MANY_BAD_CHUNKS
;
125 tv_add(&now
, &min_delay
, &pord
->next_chunk
);
128 /* okay, we have a chunk of data */
129 if (!pord
->start
.tv_sec
)
131 ret
= msg_to_buf(mp
, tmpbuf
, CHUNK_SIZE
);
132 // PARA_DEBUG_LOG("have it ts = %d, chunk_ts = %d, loaded: %d, "
133 // "bad: %d, len: %d\n", pord->timestamp, pord->chunk_ts,
134 // rn->loaded, pord->c_bad, ret);
135 if (ret
< ORTP_AUDIO_HEADER_LEN
) {
142 packet_type
= READ_PACKET_TYPE(tmpbuf
);
143 stream_type
= READ_STREAM_TYPE(tmpbuf
);
144 chunk_time
= READ_CHUNK_TIME(tmpbuf
);
145 pord
->chunk_ts
= READ_CHUNK_TS(tmpbuf
);
146 // PARA_INFO_LOG("packet type: %d, stream type: %d, chunk time: %u,"
147 // " chunk_ts: %u, loaded: %u, bad: %d\n", packet_type,
148 // stream_type, chunk_time, pord->chunk_ts, rn->loaded, pord->c_bad);
149 switch (packet_type
) {
150 unsigned header_len
, payload_len
;
155 PARA_INFO_LOG("bof (%d)\n", ret
);
156 pord
->have_header
= 1;
159 if (!pord
->have_header
&& stream_type
)
160 /* can't use the data, wait for header */
162 if (ret
+ rn
->loaded
>= CHUNK_SIZE
+ ORTP_AUDIO_HEADER_LEN
) {
166 if (ret
> ORTP_AUDIO_HEADER_LEN
) {
167 memcpy(rn
->buf
+ rn
->loaded
, tmpbuf
+ ORTP_AUDIO_HEADER_LEN
,
168 ret
- ORTP_AUDIO_HEADER_LEN
);
169 rn
->loaded
+= ret
- ORTP_AUDIO_HEADER_LEN
;
173 header_len
= READ_HEADER_LEN(tmpbuf
);
174 PARA_DEBUG_LOG("header packet (%d bytes), header len: %d\n",
176 if (!pord
->have_header
) {
177 pord
->have_header
= 1;
178 memcpy(rn
->buf
, tmpbuf
+ ORTP_AUDIO_HEADER_LEN
,
179 ret
- ORTP_AUDIO_HEADER_LEN
);
180 rn
->loaded
= ret
- ORTP_AUDIO_HEADER_LEN
;
183 if (header_len
+ ORTP_AUDIO_HEADER_LEN
> ret
) {
184 ret
= -E_INVALID_HEADER
;
187 payload_len
= ret
- ORTP_AUDIO_HEADER_LEN
- header_len
;
188 // PARA_INFO_LOG("len: %d header_len: %d, payload_len: %d, loaded: %d\n", ret,
189 // header_len, payload_len, rn->loaded);
190 if (rn
->loaded
+ payload_len
> CHUNK_SIZE
) {
195 memcpy(rn
->buf
+ rn
->loaded
, tmpbuf
196 + (ret
- payload_len
), payload_len
);
197 rn
->loaded
+= payload_len
;
204 pord
->next_chunk
= now
;
206 compute_next_chunk(&now
, chunk_time
, pord
);
213 static void ortp_shutdown(void)
215 // ortp_global_stats_display();
219 static void ortp_recv_close(struct receiver_node
*rn
)
221 struct private_ortp_recv_data
*pord
= rn
->private_data
;
223 rtp_session_destroy(pord
->session
);
224 free(rn
->private_data
);
228 static void *ortp_recv_parse_config(int argc
, char **argv
)
232 struct ortp_recv_args_info
*tmp
= para_calloc(sizeof(struct ortp_recv_args_info
));
234 ret
= ortp_recv_cmdline_parser(argc
, argv
, tmp
)? -E_ORTP_SYNTAX
: 1;
241 static int ortp_recv_open(struct receiver_node
*rn
)
243 struct private_ortp_recv_data
*pord
;
244 struct ortp_recv_args_info
*conf
= rn
->conf
;
246 rn
->buf
= para_calloc(CHUNK_SIZE
);
248 rn
->private_data
= para_calloc(sizeof(struct private_ortp_recv_data
));
249 pord
= rn
->private_data
;
250 pord
->session
= rtp_session_new(RTP_SESSION_RECVONLY
);
251 PARA_NOTICE_LOG("receiving from %s:%d\n", conf
->host_arg
, conf
->port_arg
);
252 rtp_session_set_local_addr(pord
->session
, conf
->host_arg
, conf
->port_arg
);
253 rtp_session_set_payload_type(pord
->session
, PAYLOAD_AUDIO_CONTINUOUS
);
254 if (conf
->jitter_compensation_arg
) {
255 rtp_session_enable_adaptive_jitter_compensation(pord
->session
, TRUE
);
256 rtp_session_set_jitter_compensation(pord
->session
,
257 conf
->jitter_compensation_arg
);
263 * the init function of the ortp receiver
265 * \param r pointer to the receiver struct to initialize
267 * Initialize all function pointers of \a r and call libortp's ortp_init().
269 void ortp_recv_init(struct receiver
*r
)
271 r
->shutdown
= ortp_shutdown
;
272 r
->open
= ortp_recv_open
;
273 r
->close
= ortp_recv_close
;
274 r
->pre_select
= ortp_recv_pre_select
;
275 r
->post_select
= ortp_recv_post_select
;
276 r
->parse_config
= ortp_recv_parse_config
;