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 
33 
34 #define RTP_MIN_PACKET_LENGTH 12
35 #define RTP_MAX_PACKET_LENGTH 1500
36 
37 #define RTP_REORDER_QUEUE_DEFAULT_SIZE 10
38 
39 #define RTP_NOTS_VALUE ((uint32_t)-1)
40 
43  int payload_type, int queue_size);
45  RTPDynamicProtocolHandler *handler);
47  uint8_t **buf, int len);
53 
54 int ff_rtp_set_remote_url(URLContext *h, const char *uri);
55 
67 void ff_rtp_send_punch_packets(URLContext* rtp_handle);
68 
75  AVIOContext *avio, int count);
76 
77 // these statistics are used for rtcp receiver reports...
78 typedef struct RTPStatistics {
79  uint16_t max_seq;
80  uint32_t cycles;
81  uint32_t base_seq;
82  uint32_t bad_seq;
83  int probation;
84  int received;
87  uint32_t transit;
88  uint32_t jitter;
90 
91 #define RTP_FLAG_KEY 0x1
92 #define RTP_FLAG_MARKER 0x2
93 
107 typedef int (*DynamicPayloadPacketHandlerProc)(AVFormatContext *ctx,
108  PayloadContext *s,
109  AVStream *st, AVPacket *pkt,
110  uint32_t *timestamp,
111  const uint8_t * buf,
112  int len, uint16_t seq, int flags);
113 
115  const char enc_name[50];
118  int static_payload_id; /* 0 means no payload id is set. 0 is a valid
119  * payload ID (PCMU), too, but that format doesn't
120  * require any custom depacketization code. */
121 
123  int (*init)(AVFormatContext *s, int st_index, PayloadContext *priv_data);
125  int (*parse_sdp_a_line)(AVFormatContext *s, int st_index,
126  PayloadContext *priv_data, const char *line);
128  PayloadContext *(*alloc)(void);
130  void (*free)(PayloadContext *protocol_data);
133 
135 };
136 
137 typedef struct RTPPacket {
138  uint16_t seq;
140  int len;
141  int64_t recvtime;
142  struct RTPPacket *next;
143 } RTPPacket;
144 
149  uint32_t ssrc;
150  uint16_t seq;
151  uint32_t timestamp;
152  uint32_t base_timestamp;
153  uint32_t cur_timestamp;
157  struct MpegTSContext *ts; /* only used for MP2T payloads */
160  /* used to send back RTCP RR */
161  char hostname[256];
162 
165 
167  int prev_ret;
169  int queue_len;
171 
173  /* rtcp sender statistics receive */
177  int64_t rtcp_ts_offset;
178 
179  /* rtcp sender statistics */
180  unsigned int packet_count;
181  unsigned int octet_count;
182  unsigned int last_octet_count;
183  /* buffer for partially parsed packets */
185 
186  /* dynamic payload stuff */
189 };
190 
193  enum AVMediaType codec_type);
195  enum AVMediaType codec_type);
196 
197 /* from rtsp.c, but used by rtp dynamic protocol handlers. */
198 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
199  char *value, int value_size);
200 
201 int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
202  int (*parse_fmtp)(AVStream *stream,
203  PayloadContext *data,
204  char *attr, char *value));
205 
207 
211 int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx);
212 
213 #endif /* AVFORMAT_RTPDEC_H */