FFmpeg
Data Structures | Macros | Functions | Variables
rmdec.c File Reference
#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "rmsipr.h"
#include "rm.h"

Go to the source code of this file.

Data Structures

struct  RMStream
 
struct  RMDemuxContext
 

Macros

#define DEINT_ID_GENR   MKTAG('g', 'e', 'n', 'r')
 interleaving for Cooker/ATRAC More...
 
#define DEINT_ID_INT0   MKTAG('I', 'n', 't', '0')
 no interleaving needed More...
 
#define DEINT_ID_INT4   MKTAG('I', 'n', 't', '4')
 interleaving for 28.8 More...
 
#define DEINT_ID_SIPR   MKTAG('s', 'i', 'p', 'r')
 interleaving for Sipro More...
 
#define DEINT_ID_VBRF   MKTAG('v', 'b', 'r', 'f')
 VBR case for AAC. More...
 
#define DEINT_ID_VBRS   MKTAG('v', 'b', 'r', 's')
 VBR case for AAC. More...
 
#define RAW_PACKET_SIZE   1000
 

Functions

static int rm_read_close (AVFormatContext *s)
 
static void get_strl (AVIOContext *pb, char *buf, int buf_size, int len)
 
static void get_str8 (AVIOContext *pb, char *buf, int buf_size)
 
static int rm_read_extradata (AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, unsigned size)
 
static void rm_read_metadata (AVFormatContext *s, AVIOContext *pb, int wide)
 
RMStreamff_rm_alloc_rmstream (void)
 
void ff_rm_free_rmstream (RMStream *rms)
 
static int rm_read_audio_stream_info (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int read_all)
 
int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *rst, unsigned int codec_data_size, const uint8_t *mime)
 Read the MDPR chunk, which contains stream-specific codec initialization parameters. More...
 
static int rm_read_index (AVFormatContext *s)
 this function assumes that the demuxer has already seeked to the start of the INDX chunk, and will bail out if not. More...
 
static int rm_read_header_old (AVFormatContext *s)
 
static int rm_read_multi (AVFormatContext *s, AVIOContext *pb, AVStream *st, char *mime)
 
static int rm_read_header (AVFormatContext *s)
 
static int get_num (AVIOContext *pb, int *len)
 
static int rm_sync (AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos)
 
static int rm_assemble_video_frame (AVFormatContext *s, AVIOContext *pb, RMDemuxContext *rm, RMStream *vst, AVPacket *pkt, int len, int *pseq, int64_t *timestamp)
 
static void rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
 
static int readfull (AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n)
 
int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, int len, AVPacket *pkt, int *seq, int flags, int64_t timestamp)
 Parse one rm-stream packet from the input bytestream. More...
 
int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, AVStream *st, RMStream *ast, AVPacket *pkt)
 Retrieve one cached packet from the rm-context. More...
 
static int rm_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int rm_probe (const AVProbeData *p)
 
static int64_t rm_read_dts (AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
 
static int rm_read_seek (AVFormatContext *s, int stream_index, int64_t pts, int flags)
 
static int ivr_probe (const AVProbeData *p)
 
static int ivr_read_header (AVFormatContext *s)
 
static int ivr_read_packet (AVFormatContext *s, AVPacket *pkt)
 

Variables

const AVInputFormat ff_rm_demuxer
 
const AVInputFormat ff_rdt_demuxer
 
const AVInputFormat ff_ivr_demuxer
 

Macro Definition Documentation

◆ DEINT_ID_GENR

#define DEINT_ID_GENR   MKTAG('g', 'e', 'n', 'r')

interleaving for Cooker/ATRAC

Definition at line 36 of file rmdec.c.

◆ DEINT_ID_INT0

#define DEINT_ID_INT0   MKTAG('I', 'n', 't', '0')

no interleaving needed

Definition at line 37 of file rmdec.c.

◆ DEINT_ID_INT4

#define DEINT_ID_INT4   MKTAG('I', 'n', 't', '4')

interleaving for 28.8

Definition at line 38 of file rmdec.c.

◆ DEINT_ID_SIPR

#define DEINT_ID_SIPR   MKTAG('s', 'i', 'p', 'r')

interleaving for Sipro

Definition at line 39 of file rmdec.c.

◆ DEINT_ID_VBRF

#define DEINT_ID_VBRF   MKTAG('v', 'b', 'r', 'f')

VBR case for AAC.

Definition at line 40 of file rmdec.c.

◆ DEINT_ID_VBRS

#define DEINT_ID_VBRS   MKTAG('v', 'b', 'r', 's')

VBR case for AAC.

Definition at line 41 of file rmdec.c.

◆ RAW_PACKET_SIZE

#define RAW_PACKET_SIZE   1000

Definition at line 688 of file rmdec.c.

Function Documentation

◆ rm_read_close()

static int rm_read_close ( AVFormatContext s)
static

Definition at line 1069 of file rmdec.c.

Referenced by ivr_read_header(), and rm_read_header().

◆ get_strl()

static void get_strl ( AVIOContext pb,
char *  buf,
int  buf_size,
int  len 
)
inlinestatic

Definition at line 71 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), get_str8(), and rm_read_metadata().

◆ get_str8()

static void get_str8 ( AVIOContext pb,
char *  buf,
int  buf_size 
)
static

Definition at line 79 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), rm_read_audio_stream_info(), and rm_read_header().

◆ rm_read_extradata()

static int rm_read_extradata ( AVFormatContext s,
AVIOContext pb,
AVCodecParameters par,
unsigned  size 
)
static

Definition at line 84 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_audio_stream_info().

◆ rm_read_metadata()

static void rm_read_metadata ( AVFormatContext s,
AVIOContext pb,
int  wide 
)
static

Definition at line 93 of file rmdec.c.

Referenced by rm_read_audio_stream_info(), and rm_read_header().

◆ ff_rm_alloc_rmstream()

RMStream* ff_rm_alloc_rmstream ( void  )

◆ ff_rm_free_rmstream()

void ff_rm_free_rmstream ( RMStream rms)

Definition at line 116 of file rmdec.c.

Referenced by rdt_close_context(), and rm_read_close().

◆ rm_read_audio_stream_info()

static int rm_read_audio_stream_info ( AVFormatContext s,
AVIOContext pb,
AVStream st,
RMStream ast,
int  read_all 
)
static

Definition at line 124 of file rmdec.c.

Referenced by ff_rm_read_mdpr_codecdata(), and rm_read_header_old().

◆ ff_rm_read_mdpr_codecdata()

int ff_rm_read_mdpr_codecdata ( AVFormatContext s,
AVIOContext pb,
AVStream st,
RMStream rst,
unsigned int  codec_data_size,
const uint8_t *  mime 
)

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

Parameters
scontext containing RMContext and AVIOContext for stream reading
pbcontext to read the data from
stthe stream that the MDPR chunk belongs to and where to store the parameters read from the chunk into
rstreal-specific stream information
codec_data_sizesize of the MDPR chunk
Returns
0 on success, errno codes on error

Definition at line 316 of file rmdec.c.

Referenced by ivr_read_header(), rdt_load_mdpr(), rm_read_header(), and rm_read_multi().

◆ rm_read_index()

static int rm_read_index ( AVFormatContext s)
static

this function assumes that the demuxer has already seeked to the start of the INDX chunk, and will bail out if not.

Definition at line 425 of file rmdec.c.

Referenced by rm_read_header().

◆ rm_read_header_old()

static int rm_read_header_old ( AVFormatContext s)
static

Definition at line 483 of file rmdec.c.

Referenced by rm_read_header().

◆ rm_read_multi()

static int rm_read_multi ( AVFormatContext s,
AVIOContext pb,
AVStream st,
char *  mime 
)
static

Definition at line 498 of file rmdec.c.

Referenced by ivr_read_header(), and rm_read_header().

◆ rm_read_header()

static int rm_read_header ( AVFormatContext s)
static

Definition at line 539 of file rmdec.c.

◆ get_num()

static int get_num ( AVIOContext pb,
int len 
)
static

Definition at line 671 of file rmdec.c.

Referenced by rm_assemble_video_frame().

◆ rm_sync()

static int rm_sync ( AVFormatContext s,
int64_t *  timestamp,
int flags,
int stream_index,
int64_t *  pos 
)
static

Definition at line 690 of file rmdec.c.

Referenced by rm_read_dts(), and rm_read_packet().

◆ rm_assemble_video_frame()

static int rm_assemble_video_frame ( AVFormatContext s,
AVIOContext pb,
RMDemuxContext rm,
RMStream vst,
AVPacket pkt,
int  len,
int pseq,
int64_t *  timestamp 
)
static

Definition at line 763 of file rmdec.c.

Referenced by ff_rm_parse_packet().

◆ rm_ac3_swap_bytes()

static void rm_ac3_swap_bytes ( AVStream st,
AVPacket pkt 
)
inlinestatic

Definition at line 866 of file rmdec.c.

Referenced by ff_rm_parse_packet().

◆ readfull()

static int readfull ( AVFormatContext s,
AVIOContext pb,
uint8_t *  dst,
int  n 
)
static

Definition at line 880 of file rmdec.c.

Referenced by ff_rm_parse_packet().

◆ ff_rm_parse_packet()

int ff_rm_parse_packet ( AVFormatContext s,
AVIOContext pb,
AVStream st,
RMStream rst,
int  len,
AVPacket pkt,
int seq,
int  flags,
int64_t  ts 
)

Parse one rm-stream packet from the input bytestream.

Parameters
scontext containing RMContext and AVIOContext for stream reading
pbcontext to read the data from
ststream to which the packet to be read belongs
rstReal-specific stream information
lenpacket length to read from the input
pktpacket location to store the parsed packet data
seqpointer to an integer containing the sequence number, may be updated
flagsthe packet flags
tstimestamp of the current packet
Returns
<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().

Definition at line 891 of file rmdec.c.

Referenced by ivr_read_packet(), rdt_parse_packet(), and rm_read_packet().

◆ ff_rm_retrieve_cache()

int ff_rm_retrieve_cache ( AVFormatContext s,
AVIOContext pb,
AVStream st,
RMStream rst,
AVPacket pkt 
)

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.

Parameters
scontext containing RMContext and AVIOContext for stream reading
pbcontext to read the data from
ststream that this packet belongs to
rstReal-specific stream information
pktlocation to store the packet data
Returns
the number of samples left for subsequent calls to this same function, or 0 if all samples have been retrieved.

Definition at line 979 of file rmdec.c.

Referenced by ivr_read_packet(), rdt_parse_packet(), and rm_read_packet().

◆ rm_read_packet()

static int rm_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 1011 of file rmdec.c.

◆ rm_probe()

static int rm_probe ( const AVProbeData p)
static

Definition at line 1079 of file rmdec.c.

◆ rm_read_dts()

static int64_t rm_read_dts ( AVFormatContext s,
int  stream_index,
int64_t *  ppos,
int64_t  pos_limit 
)
static

Definition at line 1092 of file rmdec.c.

◆ rm_read_seek()

static int rm_read_seek ( AVFormatContext s,
int  stream_index,
int64_t  pts,
int  flags 
)
static

Definition at line 1138 of file rmdec.c.

◆ ivr_probe()

static int ivr_probe ( const AVProbeData p)
static

Definition at line 1170 of file rmdec.c.

◆ ivr_read_header()

static int ivr_read_header ( AVFormatContext s)
static

Definition at line 1179 of file rmdec.c.

◆ ivr_read_packet()

static int ivr_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 1328 of file rmdec.c.

Variable Documentation

◆ ff_rm_demuxer

const AVInputFormat ff_rm_demuxer
Initial value:
= {
.name = "rm",
.long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
.priv_data_size = sizeof(RMDemuxContext),
.read_timestamp = rm_read_dts,
}

Definition at line 1150 of file rmdec.c.

◆ ff_rdt_demuxer

const AVInputFormat ff_rdt_demuxer
Initial value:
= {
.name = "rdt",
.long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
.priv_data_size = sizeof(RMDemuxContext),
}

Definition at line 1162 of file rmdec.c.

Referenced by rdt_init().

◆ ff_ivr_demuxer

const AVInputFormat ff_ivr_demuxer
Initial value:
= {
.name = "ivr",
.long_name = NULL_IF_CONFIG_SMALL("IVR (Internet Video Recording)"),
.priv_data_size = sizeof(RMDemuxContext),
.extensions = "ivr",
}

Definition at line 1409 of file rmdec.c.

read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
rm_read_packet
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rmdec.c:1011
rm_probe
static int rm_probe(const AVProbeData *p)
Definition: rmdec.c:1079
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
ivr_read_header
static int ivr_read_header(AVFormatContext *s)
Definition: rmdec.c:1179
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
ivr_read_packet
static int ivr_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rmdec.c:1328
RMDemuxContext
Definition: rmdec.c:59
ivr_probe
static int ivr_probe(const AVProbeData *p)
Definition: rmdec.c:1170
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
rm_read_header
static int rm_read_header(AVFormatContext *s)
Definition: rmdec.c:539
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
rm_read_close
static int rm_read_close(AVFormatContext *s)
Definition: rmdec.c:1069
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
rm_read_dts
static int64_t rm_read_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: rmdec.c:1092
rm_read_seek
static int rm_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: rmdec.c:1138
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561