Allocate and init the RDT parsing context.

Parameters

ic the containing RTSP demuxer context

first_stream_of_set_idx index to the first AVStream in the RTSP demuxer context's ic->streams array that is part of this particular stream's set of streams (with identical content)

priv_data private data of the payload data handler context

handler pointer to the parse_packet() payload parsing function

Returns

a newly allocated RDTDemuxContext. Free with ff_rdt_parse_close().

Definition at line 55 of file rdt.c.

Referenced by ff_rtsp_open_transport_ctx().

Definition at line 78 of file rdt.c.

Referenced by ff_rtsp_undo_setup().

Calculate the response (RealChallenge2 in the RTSP header) to the challenge (RealChallenge1 in the RTSP header from the Real/Helix server), which is used as some sort of client validation.

Parameters

response pointer to response buffer, it should be at least 41 bytes (40 data + 1 zero) bytes long.

chksum pointer to buffer containing a checksum of the response, it should be at least 9 (8 data + 1 zero) bytes long.

challenge pointer to the RealChallenge1 value provided by the server.

Definition at line 94 of file rdt.c.

Register RDT-related dynamic payload handlers with our cache.

Definition at line 566 of file rdt.c.

Referenced by av_register_all().

Add subscription information to Subscribe parameter string.

Parameters

cmd string to write the subscription information into.

size size of cmd.

stream_nr stream number.

rule_nr rule number to conform to.

Definition at line 384 of file rdt.c.

Referenced by rtsp_read_packet().

Parse RDT-style packet header.

Parameters

buf input buffer

len length of input buffer

pset_id will be set to the set ID this packet belongs to

pseq_no will be set to the sequence number of the packet

pstream_id will be set to the stream ID this packet belongs to

pis_keyframe will be whether this packet belongs to a keyframe

ptimestamp will be set to the timestamp of the packet

Returns

the amount of bytes consumed, or negative on error

Parse RDT-style packet header.

return 0 on packet, no more left, 1 on packet, 1 on partial packet...

Layout of the header (in bits): 1: len_included Flag indicating whether this header includes a length field; this can be used to concatenate multiple RDT packets in a single UDP/TCP data frame and is used to precede RDT data by stream status packets 1: need_reliable Flag indicating whether this header includes a "reliable sequence number"; these are apparently sequence numbers of data packets alone. For data packets, this flag is always set, according to the Real documentation [1] 5: set_id ID of a set of streams of identical content, possibly with different codecs or bitrates 1: is_reliable Flag set for certain streams deemed less tolerable for packet loss 16: seq_no Packet sequence number; if >=0xFF00, this is a non-data packet containing stream status info, the second byte indicates the type of status packet (see wireshark docs / source code [2]) if (len_included) { 16: packet_len } else { packet_len = remainder of UDP/TCP frame } 1: is_back_to_back Back-to-Back flag; used for timing, set for one in every 10 packets, according to the Real documentation [1] 1: is_slow_data Slow-data flag; currently unused, according to Real docs [1] 5: stream_id ID of the stream within this particular set of streams 1: is_no_keyframe Non-keyframe flag (unset if packet belongs to a keyframe) 32: timestamp (PTS) if (set_id == 0x1F) { 16: set_id (extended set-of-streams ID; see set_id) } if (need_reliable) { 16: reliable_seq_no Reliable sequence number (see need_reliable) } if (stream_id == 0x3F) { 16: stream_id (extended stream ID; see stream_id) } [1] https://protocol.helixcommunity.org/files/2005/devdocs/RDT_Feature_Level_20.txt [2] http://www.wireshark.org/docs/dfref/r/rdt.html and http://anonsvn.wireshark.org/viewvc/trunk/epan/dissectors/packet-rdt.c

Definition at line 190 of file rdt.c.

Referenced by ff_rdt_parse_packet(), and ff_rtsp_tcp_read_packet().

Parse RDT-style packet data (header + media data).

Usage similar to rtp_parse_packet().

< Should not be used if buf is NULL, but should be set to the timestamp of the packet returned....

Definition at line 335 of file rdt.c.

Parse a server-related SDP line.

Parameters

s the RTSP AVFormatContext

stream_index the index of the first stream in the set represented by the SDP m= line (in s->streams)

buf the SDP line

Definition at line 510 of file rdt.c.