1 files changed, 112 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/rdt.h b/ffmpeg/libavformat/rdt.h
new file mode 100644
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+++ b/ffmpeg/libavformat/rdt.h
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+/*
+ * 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,
+                                   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);
+
+/**
+ * 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 */