ccsds124_decompressor Struct Reference

Decompressor state structure. More...

#include <ccsds124.h>

Data Fields
Configuration (immutable after init)
size_t	F
bitvector_t	initial_mask
uint8_t	robustness
State (updated each cycle)
bitvector_t	mask
bitvector_t	prev_output
bitvector_t	Xt
Cycle counter
size_t	t
Diagnostics
uint8_t	mask_inconsistent
uint8_t	count_f_mismatch
Accuracy guarantee tracking
uint8_t	mask_synced
uint8_t	received_status_ring [CCSDS124_MAX_VT_HISTORY]
uint8_t	received_status_count
uint8_t	received_status_index

Detailed Description

Decompressor state structure.

Maintains all state needed for sequential packet decompression. Must be initialized with ccsds124_decompressor_init() before use.

Definition at line 872 of file ccsds124.h.

Field Documentation

count_f_mismatch

uint8_t ccsds124_decompressor::count_f_mismatch

Set when COUNT(F) in rt=1 packet differs from expected F

Definition at line 895 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompress_packet_internal(), ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

F

size_t ccsds124_decompressor::F

Output vector length in bits

Definition at line 875 of file ccsds124.h.

Referenced by ccsds124_decompress(), ccsds124_decompress_packet_internal(), and ccsds124_decompressor_init().

initial_mask

bitvector_t ccsds124_decompressor::initial_mask

M₀: Initial mask vector

Definition at line 876 of file ccsds124.h.

Referenced by ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

mask

bitvector_t ccsds124_decompressor::mask

Mₜ: Current mask vector

Definition at line 882 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_internal(), ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

mask_inconsistent

uint8_t ccsds124_decompressor::mask_inconsistent

Set when ft=1 full mask differs from delta-updated mask

Definition at line 894 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompress_packet_internal(), ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

mask_synced

uint8_t ccsds124_decompressor::mask_synced

1 when decoder mask is known to match encoder mask

Definition at line 900 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompressor_init(), ccsds124_decompressor_notify_packet_loss(), and ccsds124_decompressor_reset().

prev_output

bitvector_t ccsds124_decompressor::prev_output

Iₜ₋₁: Previous output packet

Definition at line 883 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_internal(), ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

received_status_count

uint8_t ccsds124_decompressor::received_status_count

Number of valid entries in status ring

Definition at line 902 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompressor_init(), ccsds124_decompressor_notify_packet_loss(), and ccsds124_decompressor_reset().

received_status_index

uint8_t ccsds124_decompressor::received_status_index

Write position in status ring

Definition at line 903 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompressor_init(), ccsds124_decompressor_notify_packet_loss(), and ccsds124_decompressor_reset().

received_status_ring

uint8_t ccsds124_decompressor::received_status_ring[CCSDS124_MAX_VT_HISTORY]

Status history: 0x00=guaranteed, 0x01=unguaranteed, 0x02=lost

Definition at line 901 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_checked(), ccsds124_decompressor_init(), ccsds124_decompressor_notify_packet_loss(), and ccsds124_decompressor_reset().

robustness

uint8_t ccsds124_decompressor::robustness

Rₜ: Base robustness level (0-7)

Definition at line 877 of file ccsds124.h.

Referenced by ccsds124_decompressor_init().

t

size_t ccsds124_decompressor::t

Current time index

Definition at line 889 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_internal(), ccsds124_decompressor_notify_packet_loss(), and ccsds124_decompressor_reset().

Xt

bitvector_t ccsds124_decompressor::Xt

Xₜ: Robustness window (positive changes)

Definition at line 884 of file ccsds124.h.

Referenced by ccsds124_decompress_packet_internal(), ccsds124_decompressor_init(), and ccsds124_decompressor_reset().

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The documentation for this struct was generated from the following file:

• ccsds124.h