nutdec.c File Reference

#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/avassert.h"
#include "libavutil/bswap.h"
#include "libavutil/dict.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/tree.h"
#include "libavcodec/bytestream.h"
#include "avio_internal.h"
#include "demux.h"
#include "isom.h"
#include "nut.h"
#include "riff.h"

Go to the source code of this file.

Macros
#define	NUT_MAX_STREAMS   256 /* arbitrary sanity check value */
#define	GET_V(dst, check)

Functions
static int64_t	nut_read_timestamp (AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit)
static int	get_str (AVIOContext *bc, char *string, unsigned int maxlen)
static int64_t	get_s (AVIOContext *bc)
static uint64_t	get_fourcc (AVIOContext *bc)
static int	get_packetheader (NUTContext *nut, AVIOContext *bc, int calculate_checksum, uint64_t startcode)
static uint64_t	find_any_startcode (AVIOContext *bc, int64_t pos)
static int64_t	find_startcode (AVIOContext *bc, uint64_t code, int64_t pos)
	Find the given startcode.
static int	nut_probe (const AVProbeData *p)
static int	skip_reserved (AVIOContext *bc, int64_t pos)
static int	decode_main_header (NUTContext *nut)
static int	decode_stream_header (NUTContext *nut)
static void	set_disposition_bits (AVFormatContext *avf, char *value, int stream_id)
static int	decode_info_header (NUTContext *nut)
static int	decode_syncpoint (NUTContext *nut, int64_t *ts, int64_t *back_ptr)
static int64_t	find_duration (NUTContext *nut, int64_t filesize)
static int	find_and_decode_index (NUTContext *nut)
static int	nut_read_close (AVFormatContext *s)
static int	nut_read_header (AVFormatContext *s)
static int	read_sm_data (AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta, int64_t maxpos)
static int	decode_frame_header (NUTContext *nut, int64_t *pts, int *stream_id, uint8_t *header_idx, int frame_code)
static int	decode_frame (NUTContext *nut, AVPacket *pkt, int frame_code)
static int	nut_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	read_seek (AVFormatContext *s, int stream_index, int64_t pts, int flags)

Variables
const FFInputFormat	ff_nut_demuxer

Macro Definition Documentation

NUT_MAX_STREAMS

#define NUT_MAX_STREAMS   256 /* arbitrary sanity check value */

Definition at line 39 of file nutdec.c.

Referenced by decode_main_header().

GET_V

#define GET_V	(		dst,
			check )

Value:

    do {                                                                      \
        tmp = ffio_read_varlen(bc);                                           \
        if (!(check)) {                                                       \
            av_log(s, AV_LOG_ERROR, "Error " #dst " is (%"PRId64")\n", tmp);  \
            ret = AVERROR_INVALIDDATA;                                        \
            goto fail;                                                        \
        }                                                                     \
        dst = tmp;                                                            \
    } while (0)

Definition at line 168 of file nutdec.c.

Referenced by decode_frame_header(), decode_info_header(), decode_main_header(), decode_stream_header(), and find_and_decode_index().

Function Documentation

nut_read_timestamp()

static int64_t nut_read_timestamp ( AVFormatContext * s, int stream_index, int64_t * pos_arg, int64_t pos_limit )

static

Definition at line 1207 of file nutdec.c.

Referenced by find_duration(), and read_seek().

get_str()

static int get_str ( AVIOContext * bc, char * string, unsigned int maxlen )

static

Definition at line 44 of file nutdec.c.

Referenced by decode_info_header(), and read_sm_data().

get_s()

static int64_t get_s ( AVIOContext * bc )

static

Definition at line 68 of file nutdec.c.

Referenced by decode_frame_header(), decode_info_header(), decode_main_header(), and read_sm_data().

get_fourcc()

static uint64_t get_fourcc ( AVIOContext * bc )

static

Definition at line 78 of file nutdec.c.

Referenced by decode_stream_header().

get_packetheader()

static int get_packetheader ( NUTContext * nut, AVIOContext * bc, int calculate_checksum, uint64_t startcode )

static

Definition at line 92 of file nutdec.c.

Referenced by decode_info_header(), decode_main_header(), decode_stream_header(), decode_syncpoint(), find_and_decode_index(), and nut_read_packet().

find_any_startcode()

static uint64_t find_any_startcode ( AVIOContext * bc, int64_t pos )

static

Definition at line 112 of file nutdec.c.

Referenced by find_startcode(), nut_read_header(), and nut_read_packet().

find_startcode()

static int64_t find_startcode ( AVIOContext * bc, uint64_t code, int64_t pos )

static

Find the given startcode.

Parameters

code	the startcode
pos	the start position of the search, or -1 if the current position

Returns

the position of the startcode or -1 if not found

Definition at line 143 of file nutdec.c.

Referenced by nut_read_header(), nut_read_timestamp(), and read_seek().

nut_probe()

static int nut_probe ( const AVProbeData * p )

static

Definition at line 155 of file nutdec.c.

skip_reserved()

static int skip_reserved ( AVIOContext * bc, int64_t pos )

static

Definition at line 179 of file nutdec.c.

Referenced by decode_info_header(), decode_main_header(), decode_stream_header(), decode_syncpoint(), and find_and_decode_index().

decode_main_header()

static int decode_main_header ( NUTContext * nut )

static

Definition at line 195 of file nutdec.c.

Referenced by nut_read_header().

decode_stream_header()

static int decode_stream_header ( NUTContext * nut )

static

Definition at line 381 of file nutdec.c.

Referenced by nut_read_header().

set_disposition_bits()

static void set_disposition_bits ( AVFormatContext * avf, char * value, int stream_id )

static

Definition at line 490 of file nutdec.c.

Referenced by decode_info_header().

decode_info_header()

static int decode_info_header ( NUTContext * nut )

static

Definition at line 505 of file nutdec.c.

Referenced by nut_read_header(), and nut_read_packet().

decode_syncpoint()

static int decode_syncpoint ( NUTContext * nut, int64_t * ts, int64_t * back_ptr )

static

Definition at line 628 of file nutdec.c.

Referenced by nut_read_packet(), and nut_read_timestamp().

find_duration()

static int64_t find_duration ( NUTContext * nut, int64_t filesize )

static

Definition at line 672 of file nutdec.c.

Referenced by find_and_decode_index().

find_and_decode_index()

static int find_and_decode_index ( NUTContext * nut )

static

Definition at line 684 of file nutdec.c.

Referenced by nut_read_header().

nut_read_close()

static int nut_read_close ( AVFormatContext * s )

static

Definition at line 798 of file nutdec.c.

nut_read_header()

static int nut_read_header ( AVFormatContext * s )

static

Definition at line 812 of file nutdec.c.

read_sm_data()

static int read_sm_data ( AVFormatContext * s, AVIOContext * bc, AVPacket * pkt, int is_meta, int64_t maxpos )

static

Definition at line 880 of file nutdec.c.

Referenced by decode_frame().

decode_frame_header()

static int decode_frame_header ( NUTContext * nut, int64_t * pts, int * stream_id, uint8_t * header_idx, int frame_code )

static

Definition at line 997 of file nutdec.c.

Referenced by decode_frame().

decode_frame()

static int decode_frame ( NUTContext * nut, AVPacket * pkt, int frame_code )

static

Definition at line 1080 of file nutdec.c.

Referenced by nut_read_packet().

nut_read_packet()

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

static

Definition at line 1147 of file nutdec.c.

read_seek()

static int read_seek ( AVFormatContext * s, int stream_index, int64_t pts, int flags )

static

Definition at line 1234 of file nutdec.c.

Variable Documentation

ff_nut_demuxer

const FFInputFormat ff_nut_demuxer

Initial value:

= {
    .p.name         = "nut",
    .p.long_name    = NULL_IF_CONFIG_SMALL("NUT"),
    .p.flags        = AVFMT_SEEK_TO_PTS,
    .p.extensions   = "nut",
    .p.codec_tag    = ff_nut_codec_tags,
    .priv_data_size = sizeof(NUTContext),
    .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
    .read_probe     = nut_probe,
    .read_header    = nut_read_header,
    .read_packet    = nut_read_packet,
    .read_close     = nut_read_close,
    .read_seek      = read_seek,
}

Definition at line 1307 of file nutdec.c.