/*
  * "Real" compatible muxer and demuxer.

  * Copyright (c) 2000, 2001 Fabrice Bellard

  *
  * 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_RM_H
 #define AVFORMAT_RM_H

 
 #include "avformat.h"

 #include "internal.h"

 extern const char * const ff_rm_metadata[4];

 extern const AVCodecTag ff_rm_codec_tags[];

 typedef struct RMStream RMStream;
 
 RMStream *ff_rm_alloc_rmstream (void);
 void      ff_rm_free_rmstream  (RMStream *rms);
 

 /*< input format for Realmedia-style RTSP streams */

 extern AVInputFormat ff_rdt_demuxer;

 /**
  * Read the MDPR chunk, which contains stream-specific codec initialization
  * parameters.
  *

  * @param s context containing RMContext and AVIOContext for stream reading

  * @param pb context to read the data from

  * @param st the stream that the MDPR chunk belongs to and where to store the
  *           parameters read from the chunk into

  * @param rst real-specific stream information

  * @param codec_data_size size of the MDPR chunk

  * @return 0 on success, errno codes on error
  */

 int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,

                                AVStream *st, RMStream *rst,

                                int codec_data_size, const uint8_t *mime);

 
 /**
  * Parse one rm-stream packet from the input bytestream.
  *

  * @param s context containing RMContext and AVIOContext for stream reading

  * @param pb context to read the data from

  * @param st stream to which the packet to be read belongs

  * @param rst Real-specific stream information

  * @param len packet length to read from the input
  * @param pkt packet location to store the parsed packet data
  * @param seq pointer to an integer containing the sequence number, may be
  *            updated

  * @param flags the packet flags
  * @param ts timestamp of the current packet

  * @return <0 on error, 0 if a packet was placed in the pkt pointer. A
  *         value >0 means that no data was placed in pkt, but that cached

  *         data is available by calling ff_rm_retrieve_cache().

  */

 int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,

                         AVStream *st, RMStream *rst, int len,

                         AVPacket *pkt, int *seq, int flags, int64_t ts);

 
 /**
  * Retrieve one cached packet from the rm-context. The real container can
  * store several packets (as interpreted by the codec) in a single container
  * packet, which means the demuxer holds some back when the first container
  * packet is parsed and returned. The result is that rm->audio_pkt_cnt is
  * a positive number, the amount of cached packets. Using this function, each
  * of those packets can be retrieved sequentially.
  *

  * @param s context containing RMContext and AVIOContext for stream reading

  * @param pb context to read the data from

  * @param st stream that this packet belongs to

  * @param rst Real-specific stream information

  * @param pkt location to store the packet data

  * @return the number of samples left for subsequent calls to this same

  *          function, or 0 if all samples have been retrieved.

  */

 int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,

                           AVStream *st, RMStream *rst, AVPacket *pkt);

 #endif /* AVFORMAT_RM_H */