Libav
rtpdec.h
Go to the documentation of this file.
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 
204  AVStream *stream, PayloadContext *data, const char *p,
205  int (*parse_fmtp)(AVFormatContext *s,
206  AVStream *stream,
207  PayloadContext *data,
208  char *attr, char *value));
209 
211 
215 int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx);
216 
217 #endif /* AVFORMAT_RTPDEC_H */
int queue_size
The size of queue, or 0 if reordering is disabled.
Definition: rtpdec.h:172
Bytestream IO Context.
Definition: avio.h:68
AVFormatContext * ic
Definition: rtpdec.h:148
uint16_t seq
Definition: rtpdec.h:152
RTPDynamicProtocolHandler * ff_rtp_handler_find_by_name(const char *name, enum AVMediaType codec_type)
Definition: rtpdec.c:98
int payload_type
Definition: rtpdec.h:150
int64_t range_start_offset
Definition: rtpdec.h:157
int prev_ret
Fields for packet reordering.
Definition: rtpdec.h:169
int64_t last_feedback_time
Definition: rtpdec.h:186
RTP/JPEG specific private data.
Definition: rdt.c:83
unsigned int last_octet_count
Definition: rtpdec.h:185
RTPPacket * queue
A sorted queue of buffered packets not yet returned.
Definition: rtpdec.h:170
const RTPDynamicProtocolHandler * handler
Definition: rtpdec.h:189
enum AVMediaType codec_type
Definition: rtp.c:36
int64_t ff_rtp_queued_packet_time(RTPDemuxContext *s)
Definition: rtpdec.c:699
uint32_t cycles
shifted count of sequence number cycles
Definition: rtpdec.h:81
enum AVMediaType codec_type
Definition: rtpdec.h:117
int ff_rtp_send_rtcp_feedback(RTPDemuxContext *s, URLContext *fd, AVIOContext *avio)
Definition: rtpdec.c:420
PayloadContext * dynamic_protocol_context
Definition: rtpdec.h:190
Format I/O context.
Definition: avformat.h:922
uint32_t base_seq
base sequence number
Definition: rtpdec.h:82
uint8_t
int(* init)(AVFormatContext *s, int st_index, PayloadContext *priv_data)
Initialize dynamic protocol handler, called after the full rtpmap line is parsed, may be null...
Definition: rtpdec.h:124
int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx)
Close the dynamic buffer and make a packet from it.
Definition: rtpdec.c:867
int len
Definition: rtpdec.h:142
void(* free)(PayloadContext *protocol_data)
Free any data needed by the rtp parsing for this dynamic data.
Definition: rtpdec.h:131
const char * name
int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
const char data[16]
Definition: mxf.c:70
static int flags
Definition: log.c:44
char hostname[256]
Definition: rtpdec.h:160
uint32_t expected_prior
packets expected in last interval
Definition: rtpdec.h:86
static int parse_fmtp(AVFormatContext *s, AVStream *stream, PayloadContext *data, char *attr, char *value)
Definition: rtpdec_latm.c:148
int srtp_enabled
Definition: rtpdec.h:162
void ff_rtp_parse_set_dynamic_protocol(RTPDemuxContext *s, PayloadContext *ctx, RTPDynamicProtocolHandler *handler)
Definition: rtpdec.c:520
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:105
uint16_t seq
Definition: rtpdec.h:140
int probation
sequence packets till source is valid
Definition: rtpdec.h:84
Definition: graph2dot.c:49
void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
Definition: rtpdec.c:55
DynamicPayloadPacketHandlerProc parse_packet
Parse handler for this dynamic packet.
Definition: rtpdec.h:133
int64_t rtcp_ts_offset
Definition: rtpdec.h:180
uint32_t timestamp
Definition: rtpdec.h:153
uint32_t transit
relative transit time for previous packet
Definition: rtpdec.h:88
uint32_t jitter
estimated jitter.
Definition: rtpdec.h:89
int queue_len
The number of packets in queue.
Definition: rtpdec.h:171
void ff_rtp_reset_packet_queue(RTPDemuxContext *s)
Definition: rtpdec.c:656
int(* DynamicPayloadPacketHandlerProc)(AVFormatContext *ctx, PayloadContext *s, AVStream *st, AVPacket *pkt, uint32_t *timestamp, const uint8_t *buf, int len, uint16_t seq, int flags)
Packet parsing for "private" payloads in the RTP specs.
Definition: rtpdec.h:108
int64_t first_rtcp_ntp_time
Definition: rtpdec.h:178
int64_t last_rtcp_ntp_time
Definition: rtpdec.h:176
void ff_register_rtp_dynamic_payload_handlers(void)
Definition: rtpdec.c:61
int(* parse_sdp_a_line)(AVFormatContext *s, int st_index, PayloadContext *priv_data, const char *line)
Parse the a= line from the sdp field.
Definition: rtpdec.h:126
int max_payload_size
Definition: rtpdec.h:158
RTPDemuxContext * ff_rtp_parse_open(AVFormatContext *s1, AVStream *st, int payload_type, int queue_size)
open a new RTP parse context for stream 'st'.
Definition: rtpdec.c:488
Stream structure.
Definition: avformat.h:699
uint32_t received
packets received
Definition: rtpdec.h:85
int64_t last_rtcp_reception_time
Definition: rtpdec.h:177
Libavcodec external API header.
unsigned int packet_count
Definition: rtpdec.h:183
int64_t unwrapped_timestamp
Definition: rtpdec.h:156
uint32_t last_rtcp_timestamp
Definition: rtpdec.h:179
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
void ff_rtp_parse_close(RTPDemuxContext *s)
Definition: rtpdec.c:822
unsigned int octet_count
Definition: rtpdec.h:184
enum AVCodecID codec_id
Definition: rtpdec.h:118
Definition: url.h:41
RTPDynamicProtocolHandler * ff_rtp_handler_find_by_id(int id, enum AVMediaType codec_type)
Definition: rtpdec.c:110
RTPStatistics statistics
Statistics for this stream (used by RTCP receiver reports)
Definition: rtpdec.h:166
uint32_t received_prior
packets received in last interval
Definition: rtpdec.h:87
uint32_t bad_seq
last bad sequence number + 1
Definition: rtpdec.h:83
AVMediaType
Definition: avutil.h:185
const char enc_name[50]
Definition: rtpdec.h:116
uint16_t max_seq
highest sequence number seen
Definition: rtpdec.h:80
uint8_t * buf
Definition: rtpdec.h:141
void ff_rtp_parse_set_crypto(RTPDemuxContext *s, const char *suite, const char *params)
Definition: rtpdec.c:527
Main libavformat public API header.
struct RTPPacket * next
Definition: rtpdec.h:144
uint32_t ssrc
Definition: rtpdec.h:151
int64_t recvtime
Definition: rtpdec.h:143
int ff_rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt, uint8_t **buf, int len)
Parse an RTP or RTCP packet directly sent as a buffer.
Definition: rtpdec.c:809
void ff_rtp_send_punch_packets(URLContext *rtp_handle)
Send a dummy packet on both port pairs to set up the connection state in potential NAT routers...
Definition: rtpdec.c:352
int ff_parse_fmtp(AVFormatContext *s, AVStream *stream, PayloadContext *data, const char *p, int(*parse_fmtp)(AVFormatContext *s, AVStream *stream, PayloadContext *data, char *attr, char *value))
Definition: rtpdec.c:829
uint32_t base_timestamp
Definition: rtpdec.h:154
int len
unbuffered private I/O API
int(* need_keyframe)(PayloadContext *context)
Definition: rtpdec.h:134
uint32_t cur_timestamp
Definition: rtpdec.h:155
int ff_rtp_check_and_send_back_rr(RTPDemuxContext *s, URLContext *fd, AVIOContext *avio, int count)
some rtp servers assume client is dead if they don't hear from them...
Definition: rtpdec.c:249
AVStream * st
Definition: rtpdec.h:149
This structure stores compressed data.
Definition: avcodec.h:944
struct SRTPContext srtp
Definition: rtpdec.h:163
struct RTPDynamicProtocolHandler * next
Definition: rtpdec.h:136