fca470ed009962384ce324b274790ef02a433a63
2 * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
6 /** \file ortp_recv.c paraslash's ortp receiver */
15 #include "ortp_recv.cmdline.h"
21 #define CHUNK_SIZE 128 * 1024
24 * data specific to the ortp receiver
26 * \sa receiver receiver_node
28 struct private_ortp_recv_data
{
32 * whether a header was received
34 * A flag indicating whether the ortp receiver already received a packet which
35 * contains the audio file header.
37 * This flag has no effect if the audio stream indicates that no extra headers
38 * will be sent (mp3). Otherwise, all data packets are dropped until the
42 /** the ortp session this instance of the receiver belongs to */
44 /** the time the first data or header packet was received */
46 /** ETA of the next chunk */
47 struct timeval next_chunk
;
48 /** number of consecutive bad chunks */
50 /** the current timestamp which is passed to the receiving function of libortp */
52 /** \a timestamp increases by this amount */
57 static int msg_to_buf(mblk_t
*mp
, char *buffer
, int len
)
60 size_t mlen
, rlen
= len
;
65 mlen
= m
->b_wptr
- m
->b_rptr
;
68 memcpy(buffer
, m
->b_rptr
, mlen
);
69 /* go to next mblk_t */
70 mprev
->b_cont
= m
->b_cont
;
72 consumed
->b_cont
= NULL
;
77 memcpy (buffer
, m
->b_rptr
, rlen
);
86 static void ortp_recv_pre_select(struct sched
*s
, struct task
*t
)
88 struct receiver_node
*rn
= t
->private_data
;
89 struct private_ortp_recv_data
*pord
= rn
->private_data
;
92 if (tv_diff(now
, &pord
->next_chunk
, &tmp
) >= 0) {
96 if (tv_diff(&s
->timeout
, &tmp
, NULL
) > 0)
101 static void compute_next_chunk(unsigned chunk_time
,
102 struct private_ortp_recv_data
*pord
)
104 struct timeval chunk_tv
= {0, chunk_time
};
107 tv_add(&chunk_tv
, &pord
->next_chunk
, &tmp
);
108 pord
->next_chunk
= tmp
;
109 pord
->timestamp
+= pord
->chunk_ts
;
110 // PARA_DEBUG_LOG("next chunk (ts = %d) due at %lu:%lu\n",
111 // pord->timestamp, pord->next_chunk.tv_sec,
112 // pord->next_chunk.tv_usec);
115 static void ortp_recv_post_select(__a_unused
struct sched
*s
, struct task
*t
)
117 struct receiver_node
*rn
= t
->private_data
;
118 struct private_ortp_recv_data
*pord
= rn
->private_data
;
120 int packet_type
, stream_type
;
121 char tmpbuf
[CHUNK_SIZE
+ 3];
125 // PARA_INFO_LOG("rn: %p, pord: %p, session: %p\n", rn, pord, pord->session);
126 t
->ret
= -E_ORTP_RECV_EOF
;
127 if (rn
->output_eof
&& *rn
->output_eof
) {
132 if (pord
->start
.tv_sec
)
133 if (tv_diff(now
, &pord
->next_chunk
, NULL
) < 0)
135 mp
= rtp_session_recvm_with_ts(pord
->session
, pord
->timestamp
);
137 struct timeval min_delay
= {0, 100};
138 // PARA_INFO_LOG("nope, chunk_ts = %d, loaded: %d, bad: %d\n",
139 // pord->timestamp, rn->loaded, pord->c_bad);
141 t
->ret
= -E_TOO_MANY_BAD_CHUNKS
;
142 if ((pord
->c_bad
> 5000 && pord
->start
.tv_sec
) || pord
->c_bad
> 10000)
145 tv_add(now
, &min_delay
, &pord
->next_chunk
);
148 /* okay, we have a chunk of data */
149 if (!pord
->start
.tv_sec
)
151 t
->ret
= msg_to_buf(mp
, tmpbuf
, CHUNK_SIZE
);
152 if (t
->ret
< ORTP_AUDIO_HEADER_LEN
) {
155 t
->ret
= -E_MSG_TO_BUF
;
157 t
->ret
= -E_ORTP_RECV_EOF
;
160 packet_size
= t
->ret
;
161 packet_type
= READ_PACKET_TYPE(tmpbuf
);
162 stream_type
= READ_STREAM_TYPE(tmpbuf
);
163 chunk_time
= READ_CHUNK_TIME(tmpbuf
);
164 pord
->chunk_ts
= READ_CHUNK_TS(tmpbuf
);
165 // PARA_INFO_LOG("packet type: %d, stream type: %d, chunk time: %u,"
166 // " chunk_ts: %u, loaded: %u, bad: %d\n", packet_type,
167 // stream_type, chunk_time, pord->chunk_ts, rn->loaded, pord->c_bad);
168 switch (packet_type
) {
169 unsigned header_len
, payload_len
;
172 t
->ret
= -E_ORTP_RECV_EOF
;
175 PARA_INFO_LOG("bof (%zu)\n", packet_size
);
176 pord
->have_header
= 1;
179 if (!pord
->have_header
&& stream_type
)
180 /* can't use the data, wait for header */
183 if (packet_size
+ rn
->loaded
>= CHUNK_SIZE
+ ORTP_AUDIO_HEADER_LEN
)
185 if (packet_size
> ORTP_AUDIO_HEADER_LEN
) {
186 memcpy(rn
->buf
+ rn
->loaded
, tmpbuf
+ ORTP_AUDIO_HEADER_LEN
,
187 packet_size
- ORTP_AUDIO_HEADER_LEN
);
188 rn
->loaded
+= packet_size
- ORTP_AUDIO_HEADER_LEN
;
192 header_len
= READ_HEADER_LEN(tmpbuf
);
193 PARA_DEBUG_LOG("header packet (%zu bytes), header len: %d\n",
194 packet_size
, header_len
);
195 if (!pord
->have_header
) {
196 pord
->have_header
= 1;
197 memcpy(rn
->buf
, tmpbuf
+ ORTP_AUDIO_HEADER_LEN
,
198 packet_size
- ORTP_AUDIO_HEADER_LEN
);
199 rn
->loaded
= packet_size
- ORTP_AUDIO_HEADER_LEN
;
202 t
->ret
= -E_INVALID_HEADER
;
203 if (header_len
+ ORTP_AUDIO_HEADER_LEN
> packet_size
)
205 payload_len
= packet_size
- ORTP_AUDIO_HEADER_LEN
- header_len
;
207 if (rn
->loaded
+ payload_len
> CHUNK_SIZE
)
210 memcpy(rn
->buf
+ rn
->loaded
, tmpbuf
211 + (packet_size
- payload_len
), payload_len
);
212 rn
->loaded
+= payload_len
;
220 pord
->next_chunk
= *now
;
222 compute_next_chunk(chunk_time
, pord
);
229 static void ortp_shutdown(void)
231 // ortp_global_stats_display();
235 static void ortp_recv_close(struct receiver_node
*rn
)
237 struct private_ortp_recv_data
*pord
= rn
->private_data
;
239 rtp_session_destroy(pord
->session
);
240 free(rn
->private_data
);
244 static void *ortp_recv_parse_config(int argc
, char **argv
)
248 struct ortp_recv_args_info
*tmp
=
249 para_calloc(sizeof(struct ortp_recv_args_info
));
251 ret
= ortp_recv_cmdline_parser(argc
, argv
, tmp
)? -E_ORTP_SYNTAX
: 1;
258 static int ortp_recv_open(struct receiver_node
*rn
)
260 struct private_ortp_recv_data
*pord
;
261 struct ortp_recv_args_info
*c
= rn
->conf
;
263 rn
->buf
= para_calloc(CHUNK_SIZE
);
265 rn
->private_data
= para_calloc(sizeof(struct private_ortp_recv_data
));
266 pord
= rn
->private_data
;
267 pord
->session
= rtp_session_new(RTP_SESSION_RECVONLY
);
268 PARA_NOTICE_LOG("receiving from %s:%d\n", c
->host_arg
, c
->port_arg
);
269 rtp_session_set_local_addr(pord
->session
, c
->host_arg
, c
->port_arg
);
270 rtp_session_set_remote_addr(pord
->session
, c
->host_arg
, c
->port_arg
);
271 rtp_session_set_payload_type(pord
->session
, PAYLOAD_AUDIO_CONTINUOUS
);
272 rtp_session_enable_adaptive_jitter_compensation(pord
->session
, TRUE
);
273 rtp_session_set_jitter_compensation(pord
->session
,
274 c
->jitter_compensation_arg
);
279 * the init function of the ortp receiver
281 * \param r pointer to the receiver struct to initialize
283 * Initialize all function pointers of \a r and call libortp's ortp_init().
285 void ortp_recv_init(struct receiver
*r
)
287 r
->shutdown
= ortp_shutdown
;
288 r
->open
= ortp_recv_open
;
289 r
->close
= ortp_recv_close
;
290 r
->pre_select
= ortp_recv_pre_select
;
291 r
->post_select
= ortp_recv_post_select
;
292 r
->parse_config
= ortp_recv_parse_config
;