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 #ifndef AVFORMAT_RTPDEC_H
23 #define AVFORMAT_RTPDEC_H
24 
25 #include "libavcodec/avcodec.h"
26 #include "avformat.h"
27 #include "rtp.h"
28 #include "url.h"
29 
32 
33 #define RTP_MIN_PACKET_LENGTH 12
34 #define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
35 
36 #define RTP_REORDER_QUEUE_DEFAULT_SIZE 10
37 
38 #define RTP_NOTS_VALUE ((uint32_t)-1)
39 
43  RTPDynamicProtocolHandler *handler);
45  uint8_t **buf, int len);
51 
52 int ff_rtp_set_remote_url(URLContext *h, const char *uri);
53 
65 void ff_rtp_send_punch_packets(URLContext* rtp_handle);
66 
73 
78 
79 // these statistics are used for rtcp receiver reports...
80 typedef struct {
81  uint16_t max_seq;
82  uint32_t cycles;
83  uint32_t base_seq;
84  uint32_t bad_seq;
85  int probation;
86  int received;
89  uint32_t transit;
90  uint32_t jitter;
92 
93 #define RTP_FLAG_KEY 0x1
94 #define RTP_FLAG_MARKER 0x2
95 
107 typedef int (*DynamicPayloadPacketHandlerProc) (AVFormatContext *ctx,
108  PayloadContext *s,
109  AVStream *st,
110  AVPacket * pkt,
111  uint32_t *timestamp,
112  const uint8_t * buf,
113  int len, int flags);
114 
116  // fields from AVRtpDynamicPayloadType_s
117  const char enc_name[50]; /* XXX: still why 50 ? ;-) */
120  int static_payload_id; /* 0 means no payload id is set. 0 is a valid
121  * payload ID (PCMU), too, but that format doesn't
122  * require any custom depacketization code. */
123 
124  // may be null
125  int (*init)(AVFormatContext *s, int st_index, PayloadContext *priv_data);
127  int st_index,
128  PayloadContext *priv_data,
129  const char *line);
130  PayloadContext *(*alloc) (void);
131  void (*free)(PayloadContext *protocol_data);
133 
135 };
136 
137 typedef struct RTPPacket {
138  uint16_t seq;
139  uint8_t *buf;
140  int len;
141  int64_t recvtime;
142  struct RTPPacket *next;
143 } RTPPacket;
144 
145 // moved out of rtp.c, because the h264 decoder needs to know about this structure..
150  uint32_t ssrc;
151  uint16_t seq;
152  uint32_t timestamp;
153  uint32_t base_timestamp;
154  uint32_t cur_timestamp;
158  struct MpegTSContext *ts; /* only used for MP2T payloads */
161  /* used to send back RTCP RR */
163  char hostname[256];
164 
166 
168  int prev_ret;
170  int queue_len;
172 
174  /* rtcp sender statistics receive */
175  int64_t last_rtcp_ntp_time; // TODO: move into statistics
176  int64_t first_rtcp_ntp_time; // TODO: move into statistics
177  uint32_t last_rtcp_timestamp; // TODO: move into statistics
178  int64_t rtcp_ts_offset;
179 
180  /* rtcp sender statistics */
181  unsigned int packet_count; // TODO: move into statistics (outgoing)
182  unsigned int octet_count; // TODO: move into statistics (outgoing)
183  unsigned int last_octet_count; // TODO: move into statistics (outgoing)
185  /* buffer for output */
187  uint8_t *buf_ptr;
188 
189  /* dynamic payload stuff */
193 };
194 
197  enum AVMediaType codec_type);
199  enum AVMediaType codec_type);
200 
201 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, 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 
210 #endif /* AVFORMAT_RTPDEC_H */