/* * Realmedia RTSP (RDT) definitions * Copyright (c) 2007 Ronald S. Bultje <rbultje@ronald.bitfreak.net> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVFORMAT_RDT_H #define AVFORMAT_RDT_H #include <stdint.h> #include "avformat.h" #include "rtpdec.h" typedef struct RDTDemuxContext RDTDemuxContext; /** * Allocate and init the RDT parsing context. * @param ic the containing RTSP demuxer context * @param 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) * @param priv_data private data of the payload data handler context * @param handler pointer to the parse_packet() payload parsing function * @return a newly allocated RDTDemuxContext. Free with ff_rdt_parse_close(). */ RDTDemuxContext *ff_rdt_parse_open(AVFormatContext *ic, int first_stream_of_set_idx, void *priv_data, const RTPDynamicProtocolHandler *handler); void ff_rdt_parse_close(RDTDemuxContext *s); /** * 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. * * @param response pointer to response buffer, it should be at least 41 bytes * (40 data + 1 zero) bytes long. * @param chksum pointer to buffer containing a checksum of the response, * it should be at least 9 (8 data + 1 zero) bytes long. * @param challenge pointer to the RealChallenge1 value provided by the * server. */ void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9], const char *challenge); /** * Add subscription information to Subscribe parameter string. * * @param cmd string to write the subscription information into. * @param size size of cmd. * @param stream_nr stream number. * @param rule_nr rule number to conform to. */ void ff_rdt_subscribe_rule(char *cmd, int size, int stream_nr, int rule_nr); /** * Parse RDT-style packet header. * * @param buf input buffer * @param len length of input buffer * @param pset_id will be set to the set ID this packet belongs to * @param pseq_no will be set to the sequence number of the packet * @param pstream_id will be set to the stream ID this packet belongs to * @param pis_keyframe will be whether this packet belongs to a keyframe * @param ptimestamp will be set to the timestamp of the packet * @return the amount of bytes consumed, or negative on error */ int ff_rdt_parse_header(const uint8_t *buf, int len, int *pset_id, int *pseq_no, int *pstream_id, int *pis_keyframe, uint32_t *ptimestamp); /** * Parse RDT-style packet data (header + media data). * Usage similar to rtp_parse_packet(). */ int ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt, uint8_t **buf, int len); /** * Parse a server-related SDP line. * * @param s the RTSP AVFormatContext * @param stream_index the index of the first stream in the set represented * by the SDP m= line (in s->streams) * @param buf the SDP line */ void ff_real_parse_sdp_a_line(AVFormatContext *s, int stream_index, const char *buf); #endif /* AVFORMAT_RDT_H */