Window-based Least Significant Bits (W-LSB) decoding. More...
Include dependency graph for decomp_wlsb.c:
Functions | |
| static bool | rohc_lsb_decode32 (const struct rohc_lsb_decode *const lsb, const rohc_lsb_ref_t ref_type, const uint32_t v_ref_d_offset, const uint32_t m, const size_t k, const rohc_lsb_shift_t p, uint32_t *const decoded) |
| Decode a 32-bit LSB-encoded value. More... | |
| static bool | rohc_lsb_decode16 (const struct rohc_lsb_decode *const lsb, const rohc_lsb_ref_t ref_type, const uint16_t v_ref_d_offset, const uint16_t m, const size_t k, const rohc_lsb_shift_t p, uint16_t *const decoded) |
| Decode a 16-bit LSB-encoded value. More... | |
| static bool | rohc_lsb_decode8 (const struct rohc_lsb_decode *const lsb, const rohc_lsb_ref_t ref_type, const uint8_t v_ref_d_offset, const uint8_t m, const size_t k, const rohc_lsb_shift_t p, uint8_t *const decoded) |
| Decode a 8-bit LSB-encoded value. More... | |
| void | rohc_lsb_init (struct rohc_lsb_decode *const lsb, const size_t max_len) |
| Initialize a given Least Significant Bits (LSB) decoding context. More... | |
| bool | rohc_lsb_is_ready (const struct rohc_lsb_decode *const lsb) |
| Is the LSB decoding context ready to decode a compressed value. More... | |
| bool | rohc_lsb_decode (const struct rohc_lsb_decode *const lsb, const rohc_lsb_ref_t ref_type, const uint32_t v_ref_d_offset, const uint32_t m, const size_t k, const rohc_lsb_shift_t p, uint32_t *const decoded) |
| Decode a LSB-encoded value. More... | |
| void | rohc_lsb_set_ref (struct rohc_lsb_decode *const lsb, const uint32_t v_ref_d, const bool keep_ref_minus_1) |
| Update the LSB reference value. More... | |
| uint32_t | rohc_lsb_get_ref (const struct rohc_lsb_decode *const lsb, const rohc_lsb_ref_t ref_type) |
| Get the current LSB reference value (ref 0) More... | |
Detailed Description
Window-based Least Significant Bits (W-LSB) decoding.
Function Documentation
◆ rohc_lsb_decode()
| bool rohc_lsb_decode | ( | const struct rohc_lsb_decode *const | lsb, |
| const rohc_lsb_ref_t | ref_type, | ||
| const uint32_t | v_ref_d_offset, | ||
| const uint32_t | m, | ||
| const size_t | k, | ||
| const rohc_lsb_shift_t | p, | ||
| uint32_t *const | decoded | ||
| ) |
Decode a LSB-encoded value.
See 4.5.1 in the RFC 3095 for details about LSB encoding.
- Parameters
-
lsb The LSB object used to decode ref_type The reference value to use to decode (used for context repair upon CRC failure) v_ref_d_offset The offset to apply on v_ref_d (used for context repair upon CRC failure) m The LSB value to decode k The length of the LSB value to decode p The shift value p used to efficiently encode/decode the values decoded OUT: The decoded value
- Returns
- true in case of success, false otherwise
◆ rohc_lsb_decode16()
|
static |
Decode a 16-bit LSB-encoded value.
See rohc_lsb_decode32 for details.
- Parameters
-
lsb The LSB object used to decode ref_type The reference value to use to decode (used for context repair upon CRC failure) v_ref_d_offset The offset to apply on v_ref_d (used for context repair upon CRC failure) m The LSB value to decode k The length of the LSB value to decode p The shift value p used to efficiently encode/decode the values decoded OUT: The decoded value
- Returns
- true in case of success, false otherwise
◆ rohc_lsb_decode32()
|
static |
Decode a 32-bit LSB-encoded value.
See 4.5.1 in the RFC 3095 for details about LSB encoding.
- Parameters
-
lsb The LSB object used to decode ref_type The reference value to use to decode (used for context repair upon CRC failure) v_ref_d_offset The offset to apply on v_ref_d (used for context repair upon CRC failure) m The LSB value to decode k The length of the LSB value to decode p The shift value p used to efficiently encode/decode the values decoded OUT: The decoded value
- Returns
- true in case of success, false otherwise
◆ rohc_lsb_decode8()
|
static |
Decode a 8-bit LSB-encoded value.
See rohc_lsb_decode32 for details.
- Parameters
-
lsb The LSB object used to decode ref_type The reference value to use to decode (used for context repair upon CRC failure) v_ref_d_offset The offset to apply on v_ref_d (used for context repair upon CRC failure) m The LSB value to decode k The length of the LSB value to decode p The shift value p used to efficiently encode/decode the values decoded OUT: The decoded value
- Returns
- true in case of success, false otherwise
◆ rohc_lsb_get_ref()
| uint32_t rohc_lsb_get_ref | ( | const struct rohc_lsb_decode *const | lsb, |
| const rohc_lsb_ref_t | ref_type | ||
| ) |
Get the current LSB reference value (ref 0)
- Parameters
-
lsb The LSB object ref_type The reference value to retrieve
- Returns
- The current reference value
◆ rohc_lsb_init()
| void rohc_lsb_init | ( | struct rohc_lsb_decode *const | lsb, |
| const size_t | max_len | ||
| ) |
Initialize a given Least Significant Bits (LSB) decoding context.
See 4.5.1 in the RFC 3095 for details about LSB encoding.
- Parameters
-
[in,out] lsb The LSB decoding context to init max_len The max length (in bits) of the non-compressed field
◆ rohc_lsb_is_ready()
| bool rohc_lsb_is_ready | ( | const struct rohc_lsb_decode *const | lsb | ) |
Is the LSB decoding context ready to decode a compressed value.
- Parameters
-
lsb The LSB object used to decode
- Returns
- Whether the LSB decoding context is ready to decode a value
◆ rohc_lsb_set_ref()
| void rohc_lsb_set_ref | ( | struct rohc_lsb_decode *const | lsb, |
| const uint32_t | v_ref_d, | ||
| const bool | keep_ref_minus_1 | ||
| ) |
Update the LSB reference value.
This function is called after a CRC success to update the last decoded value (for example, the SN value). See 4.5.1 in the RFC 3095 for details about LSB encoding.
- Parameters
-
lsb The LSB object v_ref_d The new reference value keep_ref_minus_1 Keep ref -1 unchanged (used for SN context repair after CRC failure, see RFC3095 ยง5.3.2.2.5)
