decenc_aec.c File Reference

Decode and encode functions for AEC compression. More...

#include <stdio.h>
#include <stdint.h>
#include <libaec.h>
#include "grib2_int.h"

Go to the source code of this file.

Functions
int	dec_aec (unsigned char *cpack, g2int len, g2int nbits, g2int flags, g2int block_size, g2int rsi, unsigned char *cfld, g2int cfldlen)
	This Function decodes an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. More...
int	enc_aec (unsigned char *data, g2int ctemplen, g2int nbits, g2int flags, g2int block_size, g2int rsi, unsigned char *aecbuf, g2int *aecbuflen)
	This Function encodes data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. More...

Detailed Description

Decode and encode functions for AEC compression.

stream

Author

Eric Engle

Date

2023-10-16

Program History Log

Date	Programmer	Comments
2023-10-16	Engle	Initial

Definition in file decenc_aec.c.

Function Documentation

dec_aec()

int dec_aec	(	unsigned char *	cpack,
		g2int	len,
		g2int	nbits,
		g2int	flags,
		g2int	block_size,
		g2int	rsi,
		unsigned char *	cfld,
		g2int	cfldlen
	)

This Function decodes an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.

Parameters

cpack	Pointer to buffer that holds the input AEC code stream.
len	Length (in bytes) of the buffer that holds the input AEC code stream.
nbits	CCSDS bits per sample.
flags	CCSDS compression options mask.
block_size	CCSDS block size.
rsi	CCSDS reference sample interval.
cfld	Pointer to output buffer from the AEC decoder.
cfldlen	length of output buffer.

Returns

• >0 Length of data from AEC decoder
• 0 Successful decode (AEC_OK)
• -1 AEC_CONF_ERROR
• -2 AEC_STREAM_ERROR
• -3 AEC_DATA_ERROR
• -4 AEC_MEM_ERROR
• -5 AEC_RSI_OFFSETS_ERROR

Author

Eric Engle

Date

2023-10-16

Definition at line 43 of file decenc_aec.c.

References LOG.

Referenced by aecunpack_int().

enc_aec()

int enc_aec	(	unsigned char *	data,
		g2int	ctemplen,
		g2int	nbits,
		g2int	flags,
		g2int	block_size,
		g2int	rsi,
		unsigned char *	aecbuf,
		g2int *	aecbuflen
	)

This Function encodes data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.

Parameters

data	Pointer to buffer that holds the input data.
ctemplen	Length (in bytes) of the buffer that holds the input data..
nbits	CCSDS bits per sample.
flags	CCSDS compression options mask.
block_size	CCSDS block size.
rsi	CCSDS reference sample interval.
aecbuf	Pointer to buffer holding the AEC encoded stream.
aecbuflen	Length of AEC code stream.

Returns

• >0 Exact length of AEC encoded data.
• 0 Successful decode (AEC_OK)
• -1 AEC_CONF_ERROR
• -2 AEC_STREAM_ERROR
• -3 AEC_DATA_ERROR
• -4 AEC_MEM_ERROR
• -5 AEC_RSI_OFFSETS_ERROR

Author

Eric Engle

Date

2023-10-16

Definition at line 111 of file decenc_aec.c.

References LOG.

Referenced by aecpack_int().