2 * RTP demuxer definitions
3 * Copyright (c) 2002 Fabrice Bellard
4 * Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com>
6 * This file is part of FFmpeg.
8 * FFmpeg 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.
13 * FFmpeg 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVFORMAT_RTPDEC_H
23 #define AVFORMAT_RTPDEC_H
25 #include "libavcodec/avcodec.h"
29 /** Structure listing useful vars to parse RTP packet payload*/
30 typedef struct rtp_payload_data
40 /** mpeg 4 AU headers */
52 int au_headers_length_bytes
;
56 typedef struct PayloadContext PayloadContext
;
57 typedef struct RTPDynamicProtocolHandler_s RTPDynamicProtocolHandler
;
59 #define RTP_MIN_PACKET_LENGTH 12
60 #define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
62 typedef struct RTPDemuxContext RTPDemuxContext
;
63 RTPDemuxContext
*rtp_parse_open(AVFormatContext
*s1
, AVStream
*st
, URLContext
*rtpc
, int payload_type
, RTPPayloadData
*rtp_payload_data
);
64 void rtp_parse_set_dynamic_protocol(RTPDemuxContext
*s
, PayloadContext
*ctx
,
65 RTPDynamicProtocolHandler
*handler
);
66 int rtp_parse_packet(RTPDemuxContext
*s
, AVPacket
*pkt
,
67 const uint8_t *buf
, int len
);
68 void rtp_parse_close(RTPDemuxContext
*s
);
70 int rtp_get_local_port(URLContext
*h
);
71 int rtp_set_remote_url(URLContext
*h
, const char *uri
);
72 void rtp_get_file_handles(URLContext
*h
, int *prtp_fd
, int *prtcp_fd
);
75 * some rtp servers assume client is dead if they don't hear from them...
76 * so we send a Receiver Report to the provided ByteIO context
77 * (we don't have access to the rtcp handle from here)
79 int rtp_check_and_send_back_rr(RTPDemuxContext
*s
, int count
);
81 // these statistics are used for rtcp receiver reports...
83 uint16_t max_seq
; ///< highest sequence number seen
84 uint32_t cycles
; ///< shifted count of sequence number cycles
85 uint32_t base_seq
; ///< base sequence number
86 uint32_t bad_seq
; ///< last bad sequence number + 1
87 int probation
; ///< sequence packets till source is valid
88 int received
; ///< packets received
89 int expected_prior
; ///< packets expected in last interval
90 int received_prior
; ///< packets received in last interval
91 uint32_t transit
; ///< relative transit time for previous packet
92 uint32_t jitter
; ///< estimated jitter.
95 #define RTP_FLAG_KEY 0x1 ///< RTP packet contains a keyframe
97 * Packet parsing for "private" payloads in the RTP specs.
99 * @param ctx RTSP demuxer context
100 * @param s stream context
101 * @param st stream that this packet belongs to
102 * @param pkt packet in which to write the parsed data
103 * @param timestamp pointer in which to write the timestamp of this RTP packet
104 * @param buf pointer to raw RTP packet data
105 * @param len length of buf
106 * @param flags flags from the RTP packet header (RTP_FLAG_*)
108 typedef int (*DynamicPayloadPacketHandlerProc
) (AVFormatContext
*ctx
,
116 struct RTPDynamicProtocolHandler_s
{
117 // fields from AVRtpDynamicPayloadType_s
118 const char enc_name
[50]; /* XXX: still why 50 ? ;-) */
119 enum CodecType codec_type
;
120 enum CodecID codec_id
;
123 int (*parse_sdp_a_line
) (AVFormatContext
*s
,
125 PayloadContext
*priv_data
,
126 const char *line
); ///< Parse the a= line from the sdp field
127 PayloadContext
*(*open
) (); ///< allocate any data needed by the rtp parsing for this dynamic data.
128 void (*close
)(PayloadContext
*protocol_data
); ///< free any data needed by the rtp parsing for this dynamic data.
129 DynamicPayloadPacketHandlerProc parse_packet
; ///< parse handler for this dynamic packet.
131 struct RTPDynamicProtocolHandler_s
*next
;
134 // moved out of rtp.c, because the h264 decoder needs to know about this structure..
135 struct RTPDemuxContext
{
142 uint32_t base_timestamp
;
143 uint32_t cur_timestamp
;
144 int max_payload_size
;
145 struct MpegTSContext
*ts
; /* only used for MP2T payloads */
148 /* used to send back RTCP RR */
152 RTPStatistics statistics
; ///< Statistics for this stream (used by RTCP receiver reports)
154 /* rtcp sender statistics receive */
155 int64_t last_rtcp_ntp_time
; // TODO: move into statistics
156 int64_t first_rtcp_ntp_time
; // TODO: move into statistics
157 uint32_t last_rtcp_timestamp
; // TODO: move into statistics
159 /* rtcp sender statistics */
160 unsigned int packet_count
; // TODO: move into statistics (outgoing)
161 unsigned int octet_count
; // TODO: move into statistics (outgoing)
162 unsigned int last_octet_count
; // TODO: move into statistics (outgoing)
164 /* buffer for output */
165 uint8_t buf
[RTP_MAX_PACKET_LENGTH
];
168 /* special infos for au headers parsing */
169 RTPPayloadData
*rtp_payload_data
; // TODO: Move into dynamic payload handlers
171 /* dynamic payload stuff */
172 DynamicPayloadPacketHandlerProc parse_packet
; ///< This is also copied from the dynamic protocol handler structure
173 PayloadContext
*dynamic_protocol_context
; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me.
174 int max_frames_per_packet
;
177 extern RTPDynamicProtocolHandler
*RTPFirstDynamicPayloadHandler
;
178 void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler
*handler
);
180 int rtsp_next_attr_and_value(const char **p
, char *attr
, int attr_size
, char *value
, int value_size
); ///< from rtsp.c, but used by rtp dynamic protocol handlers.
182 void av_register_rtp_dynamic_payload_handlers(void);
184 #endif /* AVFORMAT_RTPDEC_H */