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Zero-Heap Flight Telemetry Blackbox Binary Recorder Implementation.

  • #include "syntropic/log/syn_blackbox.h"
  • #include <string.h>

Public Functions

Type Name
SYN_Status syn_blackbox_encode_delta (SYN_Blackbox * bb, const SYN_Blackbox_Record * record, uint8_t * buf_out, size_t * out_len)
Encode a compact Predictive Delta Frame ('P') relative to last frame.
SYN_Status syn_blackbox_encode_intra (SYN_Blackbox * bb, const SYN_Blackbox_Record * record, uint8_t * buf_out, size_t * out_len)
Encode a full Intra Frame ('I') into raw binary log stream.
size_t syn_blackbox_encode_varint (int32_t val, uint8_t * buf_out)
Encode a 32-bit signed integer using ZigZag + LEB128 variable-length format.
SYN_Status syn_blackbox_init (SYN_Blackbox * bb)
Initialize Blackbox recorder.

Public Functions Documentation

function syn_blackbox_encode_delta

Encode a compact Predictive Delta Frame ('P') relative to last frame. 

SYN_Status syn_blackbox_encode_delta (
    SYN_Blackbox * bb,
    const SYN_Blackbox_Record * record,
    uint8_t * buf_out,
    size_t * out_len
)

Parameters:

  • bb Pointer to Blackbox instance.
  • record Pointer to flight state record.
  • buf_out Output buffer (must hold at least 32 bytes).
  • out_len Pointer to receive encoded byte length.

Returns:

SYN_OK on success.

function syn_blackbox_encode_intra

Encode a full Intra Frame ('I') into raw binary log stream. 

SYN_Status syn_blackbox_encode_intra (
    SYN_Blackbox * bb,
    const SYN_Blackbox_Record * record,
    uint8_t * buf_out,
    size_t * out_len
)

Parameters:

  • bb Pointer to Blackbox instance.
  • record Pointer to flight state record.
  • buf_out Output buffer (must hold at least 32 bytes).
  • out_len Pointer to receive encoded byte length.

Returns:

SYN_OK on success.

function syn_blackbox_encode_varint

Encode a 32-bit signed integer using ZigZag + LEB128 variable-length format. 

size_t syn_blackbox_encode_varint (
    int32_t val,
    uint8_t * buf_out
)

Parameters:

  • val Signed integer.
  • buf_out Output buffer (must hold at least 5 bytes).

Returns:

Number of bytes written to buffer (1..5).

function syn_blackbox_init

Initialize Blackbox recorder. 

SYN_Status syn_blackbox_init (
    SYN_Blackbox * bb
)

Parameters:

  • bb Pointer to Blackbox instance.

Returns:

SYN_OK on success.

The documentation for this class was generated from the following file src/syntropic/log/syn_blackbox.c