avidec.c File Reference

#include "config_components.h"
#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "avformat.h"
#include "avi.h"
#include "demux.h"
#include "dv.h"
#include "internal.h"
#include "isom.h"
#include "riff.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/exif.h"
#include "libavcodec/startcode.h"

Go to the source code of this file.

Data Structures
struct	AVIStream
struct	AVIContext

Macros
#define	MAX_ODML_DEPTH   1000
#define	print_tag(s, str, tag, size)

Functions
static int	avi_load_index (AVFormatContext *s)
static int	guess_ni_flag (AVFormatContext *s)
static int	get_duration (AVIStream *ast, int len)
static int	get_riff (AVFormatContext *s, AVIOContext *pb)
static int	read_odml_index (AVFormatContext *s, int64_t frame_num)
static void	clean_index (AVFormatContext *s)
static int	avi_read_tag (AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size)
static void	avi_metadata_creation_time (AVDictionary **metadata, char *date)
static void	avi_read_nikon (AVFormatContext *s, uint64_t end)
static int	avi_extract_stream_metadata (AVFormatContext *s, AVStream *st)
static int	calculate_bitrate (AVFormatContext *s)
static int	avi_read_header (AVFormatContext *s)
static int	read_gab2_sub (AVFormatContext *s, AVStream *st, AVPacket *pkt)
static AVStream *	get_subtitle_pkt (AVFormatContext *s, AVStream *next_st, AVPacket *pkt)
static int	get_stream_idx (const unsigned *d)
static int	avi_sync (AVFormatContext *s, int exit_early)
static int	ni_prepare_read (AVFormatContext *s)
static int	avi_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	avi_read_idx1 (AVFormatContext *s, int size)
static int	check_stream_max_drift (AVFormatContext *s)
static void	seek_subtitle (AVStream *st, AVStream *st2, int64_t timestamp)
static int	avi_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int	avi_read_close (AVFormatContext *s)
static int	avi_probe (const AVProbeData *p)

Variables
static const AVOption	options []
static const AVClass	demuxer_class
static const char	avi_headers [][8]
static const AVMetadataConv	avi_metadata_conv []
static const char	months [12][4]
const AVInputFormat	ff_avi_demuxer

Macro Definition Documentation

MAX_ODML_DEPTH

#define MAX_ODML_DEPTH   1000

Definition at line 88 of file avidec.c.

print_tag

#define print_tag	(		s,
			str,
			tag,
			size
	)

Value:

    av_log(s, AV_LOG_TRACE, "pos:%"PRIX64" %s: tag=%s size=0x%x\n", \
           avio_tell(pb), str, av_fourcc2str(tag), size)                  \

Definition at line 133 of file avidec.c.

Function Documentation

avi_load_index()

static int avi_load_index ( AVFormatContext *  s )

static

Definition at line 1793 of file avidec.c.

Referenced by avi_read_header(), and avi_read_seek().

guess_ni_flag()

static int guess_ni_flag ( AVFormatContext *  s )

static

Definition at line 1750 of file avidec.c.

Referenced by avi_read_header().

get_duration()

static int get_duration ( AVIStream *  ast, int  len  )

inlinestatic

Definition at line 137 of file avidec.c.

Referenced by avi_read_idx1(), avi_read_packet(), avi_sync(), and read_odml_index().

get_riff()

static int get_riff ( AVFormatContext *  s, AVIOContext *  pb  )

static

Definition at line 147 of file avidec.c.

Referenced by avi_read_header().

read_odml_index()

static int read_odml_index ( AVFormatContext *  s, int64_t  frame_num  )

static

Definition at line 172 of file avidec.c.

Referenced by avi_read_header().

clean_index()

static void clean_index ( AVFormatContext *  s )

static

Definition at line 291 of file avidec.c.

Referenced by avi_read_header().

avi_read_tag()

static int avi_read_tag ( AVFormatContext *  s, AVStream *  st, uint32_t  tag, uint32_t  size  )

static

Definition at line 320 of file avidec.c.

Referenced by avi_read_header().

avi_metadata_creation_time()

static void avi_metadata_creation_time ( AVDictionary **  metadata, char *  date  )

static

Definition at line 349 of file avidec.c.

Referenced by avi_read_header().

avi_read_nikon()

static void avi_read_nikon ( AVFormatContext *  s, uint64_t  end  )

static

Definition at line 368 of file avidec.c.

Referenced by avi_read_header().

avi_extract_stream_metadata()

static int avi_extract_stream_metadata ( AVFormatContext *  s, AVStream *  st  )

static

Definition at line 412 of file avidec.c.

Referenced by avi_read_header().

calculate_bitrate()

static int calculate_bitrate ( AVFormatContext *  s )

static

Definition at line 450 of file avidec.c.

Referenced by avi_read_header().

avi_read_header()

static int avi_read_header ( AVFormatContext *  s )

static

Definition at line 495 of file avidec.c.

read_gab2_sub()

static int read_gab2_sub ( AVFormatContext *  s, AVStream *  st, AVPacket *  pkt  )

static

Definition at line 1105 of file avidec.c.

Referenced by avi_read_packet().

get_subtitle_pkt()

static AVStream* get_subtitle_pkt ( AVFormatContext *  s, AVStream *  next_st, AVPacket *  pkt  )

static

Definition at line 1183 of file avidec.c.

Referenced by avi_read_packet().

get_stream_idx()

static int get_stream_idx ( const unsigned *  d )

static

Definition at line 1217 of file avidec.c.

Referenced by avi_sync(), and guess_ni_flag().

avi_sync()

static int avi_sync ( AVFormatContext *  s, int  exit_early  )

static

Parameters

exit_early

set to 1 to just gather packet position without making the changes needed to actually read & return the packet

Definition at line 1231 of file avidec.c.

Referenced by avi_read_idx1(), and avi_read_packet().

ni_prepare_read()

static int ni_prepare_read ( AVFormatContext *  s )

static

Definition at line 1385 of file avidec.c.

Referenced by avi_read_packet().

avi_read_packet()

static int avi_read_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 1457 of file avidec.c.

avi_read_idx1()

static int avi_read_idx1 ( AVFormatContext *  s, int  size  )

static

Definition at line 1604 of file avidec.c.

Referenced by avi_load_index().

check_stream_max_drift()

static int check_stream_max_drift ( AVFormatContext *  s )

static

Definition at line 1692 of file avidec.c.

Referenced by guess_ni_flag().

seek_subtitle()

static void seek_subtitle ( AVStream *  st, AVStream *  st2, int64_t  timestamp  )

static

Definition at line 1836 of file avidec.c.

Referenced by avi_read_seek().

avi_read_seek()

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

static

Definition at line 1846 of file avidec.c.

avi_read_close()

static int avi_read_close ( AVFormatContext *  s )

static

Definition at line 1977 of file avidec.c.

avi_probe()

static int avi_probe ( const AVProbeData *  p )

static

Definition at line 2000 of file avidec.c.

Variable Documentation

options

const AVOption options[]

static

Initial value:

= {
    { "use_odml", "use odml index", 0x42, AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM},
    { NULL },
}

Definition at line 93 of file avidec.c.

demuxer_class

const AVClass demuxer_class

static

Initial value:

= {
    .class_name = "avi",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEMUXER,
}

Definition at line 98 of file avidec.c.

avi_headers

const char avi_headers[][8]

static

Initial value:

= {
    { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' '  },
    { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X'  },
    { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19 },
    { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f'  },
    { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' '  },
    { 0 }
}

Definition at line 107 of file avidec.c.

Referenced by avi_probe(), and get_riff().

avi_metadata_conv

const AVMetadataConv avi_metadata_conv[]

static

Initial value:

= {
    { "strn", "title" },
    { "isbj", "subject" },
    { "inam", "title" },
    { "iart", "artist" },
    { "icop", "copyright" },
    { "icmt", "comment" },
    { "ignr", "genre" },
    { "iprd", "product" },
    { "isft", "software" },
 
    { 0 },
}

Definition at line 116 of file avidec.c.

Referenced by avi_read_header().

months

const char months[12][4]

static

Initial value:

= { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                                    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }

Definition at line 346 of file avidec.c.

Referenced by avi_metadata_creation_time().

ff_avi_demuxer

const AVInputFormat ff_avi_demuxer

Initial value:

= {
    .name           = "avi",
    .long_name      = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
    .priv_data_size = sizeof(AVIContext),
    .flags_internal = FF_FMT_INIT_CLEANUP,
    .extensions     = "avi",
    .read_probe     = avi_probe,
    .read_header    = avi_read_header,
    .read_packet    = avi_read_packet,
    .read_close     = avi_read_close,
    .read_seek      = avi_read_seek,
    .priv_class = &demuxer_class,
}

Definition at line 2013 of file avidec.c.