mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-12 02:14:56 +02:00
ff13ba92fd
in rtpdec.c, so that they can be shared and used in the same way in rtsp.c.
The handlers, since they are specific for RDT, are registered in rdt.c and
a new registration function is thus called from allformats.c.
The dynamic payload handler also implements RDT-specific SDP-line parsing for
OpaqueData and StartTime, which are specific for RDT and needed for proper
playback. OpaqueData contains one or a list ("MLTI") of "MDPR" chunks that
can be parsed by the rmdec.c function ff_rm_read_mdpr_codecdata(). To use
this function, we create a new rdt_demuxer, which has the same private data
as the rm_demuxer. The resulting AVFormatContext created with _open_stream()
can thus be used to call functions in the RM demuxer.
See discussion in "Realmedia patch" thread on ML.
Originally committed as revision 15234 to svn://svn.ffmpeg.org/ffmpeg/trunk
113 lines
4.3 KiB
C
113 lines
4.3 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"
|
|
|
|
|
|
typedef struct {
|
|
int nb_packets;
|
|
int packet_total_size;
|
|
int packet_max_size;
|
|
/* codec related output */
|
|
int bit_rate;
|
|
float frame_rate;
|
|
int nb_frames; /* current frame number */
|
|
int total_frames; /* total number of frames */
|
|
int num;
|
|
AVCodecContext *enc;
|
|
} StreamInfo;
|
|
|
|
typedef struct {
|
|
StreamInfo streams[2];
|
|
StreamInfo *audio_stream, *video_stream;
|
|
int data_pos; /* position of the data after the header */
|
|
int nb_packets;
|
|
int old_format;
|
|
int current_stream;
|
|
int remaining_len;
|
|
uint8_t *videobuf; ///< place to store merged video frame
|
|
int videobufsize; ///< current assembled frame size
|
|
int videobufpos; ///< position for the next slice in the video buffer
|
|
int curpic_num; ///< picture number of current frame
|
|
int cur_slice, slices;
|
|
int64_t pktpos; ///< first slice position in file
|
|
/// Audio descrambling matrix parameters
|
|
uint8_t *audiobuf; ///< place to store reordered audio data
|
|
int64_t audiotimestamp; ///< Audio packet timestamp
|
|
int sub_packet_cnt; // Subpacket counter, used while reading
|
|
int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
|
|
int audio_stream_num; ///< Stream number for audio packets
|
|
int audio_pkt_cnt; ///< Output packet counter
|
|
int audio_framesize; /// Audio frame size from container
|
|
int sub_packet_lengths[16]; /// Length of each aac subpacket
|
|
} RMContext;
|
|
|
|
/*< 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 st the stream that the MDPR chunk belongs to and where to store the
|
|
* parameters read from the chunk into
|
|
* @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, AVStream *st, int codec_data_size);
|
|
|
|
/**
|
|
* Parse one rm-stream packet from the input bytestream.
|
|
*
|
|
* @param s context containing RMContext and ByteIOContext for stream reading
|
|
* @param st stream to which the packet to be read belongs
|
|
* @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 pointer to an integer containing the packet flags, may be
|
|
updated
|
|
* @param ts pointer to timestamp, may be updated
|
|
* @return 0 on success, errno codes on error
|
|
*/
|
|
int ff_rm_parse_packet (AVFormatContext *s, AVStream *st, 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 st stream that this packet belongs to
|
|
* @param pkt location to store the packet data
|
|
*/
|
|
void ff_rm_retrieve_cache (AVFormatContext *s, AVStream *st, AVPacket *pkt);
|
|
|
|
#endif /* AVFORMAT_RM_H */
|