PeerStreamer

/*

 * 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

typedef struct RDTDemuxContext RDTDemuxContext;

RDTDemuxContext *ff_rdt_parse_open(AVFormatContext *ic, AVStream *st,

                                   void *priv_data,

                                   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);

/**

 * Register RDT-related dynamic payload handlers with our cache.

 */

void av_register_rdt_dynamic_payload_handlers(void);

/**

 * 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);

// FIXME this will be removed ASAP

void ff_rdt_subscribe_rule2(RDTDemuxContext *s, 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 sn will be set to the stream number this packet belongs to

 * @param seq will be set to the sequence number this packet belongs to

 * @param rn will be set to the rule number this packet belongs to

 * @param ts will be set to the timestamp of the packet

 * @return the amount of bytes consumed, or <0 on error

 */

int ff_rdt_parse_header(const uint8_t *buf, int len,

                        int *sn, int *seq, int *rn, uint32_t *ts);

/**

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

 * Usage similar to rtp_parse_packet().

 */

int ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,

                        const uint8_t *buf, int len);

#endif /* AVFORMAT_RDT_H */