Libav
rtpdec.h
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1 /*
2  * RTP demuxer definitions
3  * Copyright (c) 2002 Fabrice Bellard
4  * Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com>
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVFORMAT_RTPDEC_H
24 #define AVFORMAT_RTPDEC_H
25 
26 #include "libavcodec/avcodec.h"
27 #include "avformat.h"
28 #include "rtp.h"
29 #include "url.h"
30 #include "srtp.h"
31 
32 typedef struct PayloadContext PayloadContext;
34 
35 #define RTP_MIN_PACKET_LENGTH 12
36 #define RTP_MAX_PACKET_LENGTH 8192
37 
38 #define RTP_REORDER_QUEUE_DEFAULT_SIZE 10
39 
40 #define RTP_NOTS_VALUE ((uint32_t)-1)
41 
42 typedef struct RTPDemuxContext RTPDemuxContext;
44  int payload_type, int queue_size);
47 void ff_rtp_parse_set_crypto(RTPDemuxContext *s, const char *suite,
48  const char *params);
50  uint8_t **buf, int len);
54 
66 void ff_rtp_send_punch_packets(URLContext* rtp_handle);
67 
74  AVIOContext *avio, int count);
76  AVIOContext *avio);
77 
78 // these statistics are used for rtcp receiver reports...
79 typedef struct RTPStatistics {
80  uint16_t max_seq;
81  uint32_t cycles;
82  uint32_t base_seq;
83  uint32_t bad_seq;
84  int probation;
85  uint32_t received;
86  uint32_t expected_prior;
87  uint32_t received_prior;
88  uint32_t transit;
89  uint32_t jitter;
91 
92 #define RTP_FLAG_KEY 0x1
93 #define RTP_FLAG_MARKER 0x2
94 
108 typedef int (*DynamicPayloadPacketHandlerProc)(AVFormatContext *ctx,
109  PayloadContext *s,
110  AVStream *st, AVPacket *pkt,
111  uint32_t *timestamp,
112  const uint8_t * buf,
113  int len, uint16_t seq, int flags);
114 
116  const char enc_name[50];
119  int static_payload_id; /* 0 means no payload id is set. 0 is a valid
120  * payload ID (PCMU), too, but that format doesn't
121  * require any custom depacketization code. */
122 
124  int (*init)(AVFormatContext *s, int st_index, PayloadContext *priv_data);
126  int (*parse_sdp_a_line)(AVFormatContext *s, int st_index,
127  PayloadContext *priv_data, const char *line);
129  PayloadContext *(*alloc)(void);
131  void (*free)(PayloadContext *protocol_data);
134  int (*need_keyframe)(PayloadContext *context);
135 
137 };
138 
139 typedef struct RTPPacket {
140  uint16_t seq;
142  int len;
143  int64_t recvtime;
144  struct RTPPacket *next;
145 } RTPPacket;
146 
151  uint32_t ssrc;
152  uint16_t seq;
153  uint32_t timestamp;
154  uint32_t base_timestamp;
155  uint32_t cur_timestamp;
159  /* used to send back RTCP RR */
160  char hostname[256];
161 
164 
167 
169  int prev_ret;
171  int queue_len;
173 
175  /* rtcp sender statistics receive */
180  int64_t rtcp_ts_offset;
181 
182  /* rtcp sender statistics */
183  unsigned int packet_count;
184  unsigned int octet_count;
185  unsigned int last_octet_count;
187 
188  /* dynamic payload stuff */
191 };
192 
195  enum AVMediaType codec_type);
197  enum AVMediaType codec_type);
198 
199 /* from rtsp.c, but used by rtp dynamic protocol handlers. */
200 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
201  char *value, int value_size);
202 
203 int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
204  int (*parse_fmtp)(AVStream *stream,
205  PayloadContext *data,
206  char *attr, char *value));
207 
209 
213 int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx);
214 
215 #endif /* AVFORMAT_RTPDEC_H */