yading@11: /*
yading@11:  * "Real" compatible muxer and demuxer.
yading@11:  * Copyright (c) 2000, 2001 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVFORMAT_RM_H
yading@11: #define AVFORMAT_RM_H
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: 
yading@11: extern const char * const ff_rm_metadata[4];
yading@11: extern const AVCodecTag ff_rm_codec_tags[];
yading@11: 
yading@11: typedef struct RMStream RMStream;
yading@11: 
yading@11: RMStream *ff_rm_alloc_rmstream (void);
yading@11: void      ff_rm_free_rmstream  (RMStream *rms);
yading@11: 
yading@11: /*< input format for Realmedia-style RTSP streams */
yading@11: extern AVInputFormat ff_rdt_demuxer;
yading@11: 
yading@11: /**
yading@11:  * Read the MDPR chunk, which contains stream-specific codec initialization
yading@11:  * parameters.
yading@11:  *
yading@11:  * @param s context containing RMContext and AVIOContext for stream reading
yading@11:  * @param pb context to read the data from
yading@11:  * @param st the stream that the MDPR chunk belongs to and where to store the
yading@11:  *           parameters read from the chunk into
yading@11:  * @param rst real-specific stream information
yading@11:  * @param codec_data_size size of the MDPR chunk
yading@11:  * @return 0 on success, errno codes on error
yading@11:  */
yading@11: int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
yading@11:                                AVStream *st, RMStream *rst,
yading@11:                                int codec_data_size, const uint8_t *mime);
yading@11: 
yading@11: /**
yading@11:  * Parse one rm-stream packet from the input bytestream.
yading@11:  *
yading@11:  * @param s context containing RMContext and AVIOContext for stream reading
yading@11:  * @param pb context to read the data from
yading@11:  * @param st stream to which the packet to be read belongs
yading@11:  * @param rst Real-specific stream information
yading@11:  * @param len packet length to read from the input
yading@11:  * @param pkt packet location to store the parsed packet data
yading@11:  * @param seq pointer to an integer containing the sequence number, may be
yading@11:  *            updated
yading@11:  * @param flags the packet flags
yading@11:  * @param ts timestamp of the current packet
yading@11:  * @return <0 on error, 0 if a packet was placed in the pkt pointer. A
yading@11:  *         value >0 means that no data was placed in pkt, but that cached
yading@11:  *         data is available by calling ff_rm_retrieve_cache().
yading@11:  */
yading@11: int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
yading@11:                         AVStream *st, RMStream *rst, int len,
yading@11:                         AVPacket *pkt, int *seq, int flags, int64_t ts);
yading@11: 
yading@11: /**
yading@11:  * Retrieve one cached packet from the rm-context. The real container can
yading@11:  * store several packets (as interpreted by the codec) in a single container
yading@11:  * packet, which means the demuxer holds some back when the first container
yading@11:  * packet is parsed and returned. The result is that rm->audio_pkt_cnt is
yading@11:  * a positive number, the amount of cached packets. Using this function, each
yading@11:  * of those packets can be retrieved sequentially.
yading@11:  *
yading@11:  * @param s context containing RMContext and AVIOContext for stream reading
yading@11:  * @param pb context to read the data from
yading@11:  * @param st stream that this packet belongs to
yading@11:  * @param rst Real-specific stream information
yading@11:  * @param pkt location to store the packet data
yading@11:  * @return the number of samples left for subsequent calls to this same
yading@11:  *          function, or 0 if all samples have been retrieved.
yading@11:  */
yading@11: int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
yading@11:                           AVStream *st, RMStream *rst, AVPacket *pkt);
yading@11: 
yading@11: #endif /* AVFORMAT_RM_H */