#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"

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. More...

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 38 of file nutdec.c.

◆ 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 167 of file nutdec.c.

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 1204 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 43 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 67 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 77 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 91 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 111 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 142 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 154 of file nutdec.c.

◆ skip_reserved()

static int skip_reserved	(	AVIOContext *	bc,
		int64_t	pos
	)

static

Definition at line 178 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 194 of file nutdec.c.

Referenced by nut_read_header().

◆ decode_stream_header()

static int decode_stream_header ( NUTContext * nut )

static

Definition at line 380 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 489 of file nutdec.c.

Referenced by decode_info_header().

◆ decode_info_header()

static int decode_info_header ( NUTContext * nut )

static

Definition at line 504 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 627 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 671 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 683 of file nutdec.c.

Referenced by nut_read_header().

◆ nut_read_close()

static int nut_read_close ( AVFormatContext * s )

static

Definition at line 797 of file nutdec.c.

◆ nut_read_header()

static int nut_read_header ( AVFormatContext * s )

static

Definition at line 811 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 879 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 996 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 1079 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 1146 of file nutdec.c.

◆ read_seek()

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

static

Definition at line 1231 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 1304 of file nutdec.c.

Macros

Functions

Variables

Macro Definition Documentation

◆ NUT_MAX_STREAMS

◆ GET_V

Function Documentation

◆ nut_read_timestamp()

◆ get_str()

◆ get_s()

◆ get_fourcc()

◆ get_packetheader()

◆ find_any_startcode()

◆ find_startcode()

◆ nut_probe()

◆ skip_reserved()

◆ decode_main_header()

◆ decode_stream_header()

◆ set_disposition_bits()

◆ decode_info_header()

◆ decode_syncpoint()

◆ find_duration()

◆ find_and_decode_index()

◆ nut_read_close()

◆ nut_read_header()

◆ read_sm_data()

◆ decode_frame_header()

◆ decode_frame()

◆ nut_read_packet()

◆ read_seek()

Variable Documentation

◆ ff_nut_demuxer