mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
102 lines
4.0 KiB
C
102 lines
4.0 KiB
C
/*
|
|
* "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"
|
|
|
|
extern const char * const ff_rm_metadata[4];
|
|
extern const unsigned char ff_sipr_subpk_size[4];
|
|
|
|
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 rdt_demuxer;
|
|
|
|
/**
|
|
* Read the MDPR chunk, which contains stream-specific codec initialization
|
|
* parameters.
|
|
*
|
|
* @param s context containing RMContext and ByteIOContext 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, ByteIOContext *pb,
|
|
AVStream *st, RMStream *rst,
|
|
int codec_data_size);
|
|
|
|
/**
|
|
* Parse one rm-stream packet from the input bytestream.
|
|
*
|
|
* @param s context containing RMContext and ByteIOContext 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, ByteIOContext *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 ByteIOContext 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, ByteIOContext *pb,
|
|
AVStream *st, RMStream *rst, AVPacket *pkt);
|
|
|
|
/**
|
|
* Perform 4-bit block reordering for SIPR data.
|
|
*
|
|
* @param buf SIPR data
|
|
*/
|
|
void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize);
|
|
|
|
#endif /* AVFORMAT_RM_H */
|