FFmpeg/libavformat/rdt.h

/*
 * 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

/**
 * 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);

#endif /* AVFORMAT_RDT_H */