avidec.c File Reference

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bswap.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 "dv.h"
#include "internal.h"
#include "isom.h"
#include "riff.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/exif.h"
#include "libavcodec/internal.h"

Go to the source code of this file.

Data Structures
struct	AVIStream
struct	AVIContext

Macros
#define	MAX_ODML_DEPTH   1000
#define	print_tag(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, int 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 (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]
AVInputFormat	ff_avi_demuxer

Macro Definition Documentation

#define MAX_ODML_DEPTH   1000

Definition at line 84 of file avidec.c.

Referenced by read_odml_index().

#define print_tag	(		str,
			tag,
			size
	)

Value:

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

Definition at line 120 of file avidec.c.

Referenced by avi_read_header().

Function Documentation

static int avi_load_index ( AVFormatContext *  s )

static

Definition at line 1728 of file avidec.c.

Referenced by avi_read_header(), and avi_read_seek().

static int guess_ni_flag ( AVFormatContext *  s )

static

Definition at line 1686 of file avidec.c.

Referenced by avi_read_header().

static int get_duration ( AVIStream *  ast, int  len  )

inlinestatic

Definition at line 124 of file avidec.c.

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

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

static

Definition at line 134 of file avidec.c.

Referenced by avi_read_header().

static int read_odml_index ( AVFormatContext *  s, int  frame_num  )

static

Definition at line 159 of file avidec.c.

Referenced by avi_read_header().

static void clean_index ( AVFormatContext *  s )

static

Definition at line 267 of file avidec.c.

Referenced by avi_read_header().

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

static

Definition at line 295 of file avidec.c.

Referenced by avi_read_header().

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

static

Definition at line 322 of file avidec.c.

Referenced by avi_read_header().

static void avi_read_nikon ( AVFormatContext *  s, uint64_t  end  )

static

Definition at line 341 of file avidec.c.

Referenced by avi_read_header().

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

static

Definition at line 384 of file avidec.c.

Referenced by avi_read_header().

static int calculate_bitrate ( AVFormatContext *  s )

static

Definition at line 422 of file avidec.c.

Referenced by avi_read_header().

static int avi_read_header ( AVFormatContext *  s )

static

Definition at line 466 of file avidec.c.

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

static

Definition at line 1062 of file avidec.c.

Referenced by avi_read_packet().

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

static

Definition at line 1131 of file avidec.c.

Referenced by avi_read_packet().

static int get_stream_idx ( const unsigned *  d )

static

Definition at line 1165 of file avidec.c.

Referenced by avi_sync(), and guess_ni_flag().

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 1179 of file avidec.c.

Referenced by avi_read_idx1(), and avi_read_packet().

static int ni_prepare_read ( AVFormatContext *  s )

static

Definition at line 1328 of file avidec.c.

Referenced by avi_read_packet().

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

static

Definition at line 1397 of file avidec.c.

static int avi_read_idx1 ( AVFormatContext *  s, int  size  )

static

Definition at line 1543 of file avidec.c.

Referenced by avi_load_index().

static int check_stream_max_drift ( AVFormatContext *  s )

static

Definition at line 1631 of file avidec.c.

Referenced by guess_ni_flag().

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

static

Definition at line 1768 of file avidec.c.

Referenced by avi_read_seek().

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

static

Definition at line 1778 of file avidec.c.

static int avi_read_close ( AVFormatContext *  s )

static

Definition at line 1895 of file avidec.c.

static int avi_probe ( AVProbeData *  p )

static

Definition at line 1918 of file avidec.c.

Variable Documentation

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 89 of file avidec.c.

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 94 of file avidec.c.

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 103 of file avidec.c.

Referenced by avi_probe(), and get_riff().

const AVMetadataConv avi_metadata_conv[]

static

Initial value:

= {
    { "strn", "title" },
    { 0 },
}

Definition at line 112 of file avidec.c.

const char months[12][4]

static

Initial value:

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

Definition at line 319 of file avidec.c.

Referenced by avi_metadata_creation_time().

AVInputFormat ff_avi_demuxer

Initial value:

= {
    .name           = "avi",
    .long_name      = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
    .priv_data_size = sizeof(AVIContext),
    .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 1931 of file avidec.c.