decenc_aec.c(3)

💖 decenc_aec.c — Library Functions Manual 💖

okay bestie, pull up a chair, because we're decoding AND encoding AEC code streams today and it's honestly giving main character energy. this whole page lives in decenc_aec.c(3) — that's the manpage name, the whole Library Functions Manual vibe, and yes we're gonna read all of it together. no skimming, no cap. 🦋

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✨ NAME ✨

decenc_aec.c — Decode/encode an AEC code stream.

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🌸 SYNOPSIS 🌸

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

🎀 Functions

• int dec_aec (unsigned char *cpack, g2int len, g2int nbits, g2int flags, g2int block_size, g2int rsi, unsigned char *cfld, g2int cfldlen) — Decode an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.
• int enc_aec (unsigned char *data, g2int ctemplen, g2int nbits, g2int flags, g2int block_size, g2int rsi, unsigned char *aecbuf, g2int *aecbuflen) — Encode data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.
• int g2c_dec_aec (unsigned char *cpack, int len, int nbits, int flags, int block_size, int rsi, unsigned char *cfld, int cfldlen) — Decode an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.
• int g2c_enc_aec (unsigned char *data, int ctemplen, int nbits, int flags, int block_size, int rsi, unsigned char *aecbuf, int *aecbuflen) — Encode data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book.

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💅 Detailed Description 💅

Decode/encode an AEC code stream. that's the whole vibe, and honestly? iconic. ✨

Author Eric Engle

Date 2023-10-16

Definition in file decenc_aec.c.

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👑 Function Documentation 👑

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

Decode an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. literally what it says on the tin, bestie. 💖

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 38 of file decenc_aec.c.

References LOG.

Referenced by aecunpack_int(), and g2c_dec_aec().

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

Encode data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. the other half of the glow-up, periodt. 🔥

Parameters

• data — Pointer to buffer that holds the input data.
• ctemplen — Length (in bytes) of the buffer that holds the input data.. (yes, two dots, that's what it says, i don't make the rules 🙈)
• 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 108 of file decenc_aec.c.

References LOG.

Referenced by aecpack_int(), and g2c_enc_aec().

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🌈 int g2c_dec_aec (unsigned char * cpack, int len, int nbits, int flags, int block_size, int rsi, unsigned char * cfld, int cfldlen)

Decode an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. same energy, just with int instead of g2int, iykyk. ✨

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 Alyson Stahl

Date 10/2025

Definition at line 179 of file decenc_aec.c.

References dec_aec().

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🍓 int g2c_enc_aec (unsigned char * data, int ctemplen, int nbits, int flags, int block_size, int rsi, unsigned char * aecbuf, int * aecbuflen)

Encode data into an AEC code stream specified in the CCSDS 121.0-B-3 Blue Book. she's the int-flavored twin and she ate. 💅

Parameters

• data — Pointer to buffer that holds the input data.
• ctemplen — Length (in bytes) of the buffer that holds the input data.. (again with the double dot, i'm just the messenger 😭)
• 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 Alyson Stahl

Date 10/2025

Definition at line 215 of file decenc_aec.c.

References enc_aec().

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🫶 Author 🫶

Generated automatically by Doxygen for NCEPLIBS-g2c from the source code.

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k that's the whole page bestie, every flag, every param, every return code, all present and accounted for. nothing skipped, nothing invented. slay. 💖

so this little love letter to AEC streams is from NCEPLIBS-g2c, Version 2.3.0, and that's the whole decenc_aec.c(3) situation — go decode something iconic. mwah. 🌸💅✨