ROHC compression/decompression library
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Least Significant Bits (LSB) encoding. More...
Functions | |
void | d_lsb_init (struct d_lsb_decode *const lsb, const uint32_t v_ref_d, const short p) |
Initialize a Least Significant Bits (LSB) encoding object. | |
int | d_lsb_decode32 (const struct d_lsb_decode *const lsb, const uint32_t m, const size_t k, uint32_t *const decoded) |
Decode a 32-bit LSB-encoded value. | |
int | d_lsb_decode16 (const struct d_lsb_decode *const lsb, const uint16_t m, const size_t k, uint16_t *const decoded) |
Decode a 16-bit LSB-encoded value. | |
void | d_lsb_update (struct d_lsb_decode *const lsb, const uint32_t v_ref_d) |
Update the LSB reference value. | |
void | d_lsb_sync_ref (struct d_lsb_decode *const lsb) |
Replace the previous LSB reference value with the current one. | |
uint32_t | d_get_lsb_ref (struct d_lsb_decode *const lsb) |
Get the current LSB reference value. | |
uint32_t | d_get_lsb_old_ref (struct d_lsb_decode *const lsb) |
Get the previous LSB reference value. |
Least Significant Bits (LSB) encoding.
uint32_t d_get_lsb_old_ref | ( | struct d_lsb_decode *const | lsb | ) |
Get the previous LSB reference value.
lsb | The LSB object |
References d_lsb_decode::old_v_ref_d.
uint32_t d_get_lsb_ref | ( | struct d_lsb_decode *const | lsb | ) |
Get the current LSB reference value.
lsb | The LSB object |
References d_lsb_decode::v_ref_d.
Referenced by d_generic_get_sn(), and ts_decode_scaled().
int d_lsb_decode16 | ( | const struct d_lsb_decode *const | lsb, |
const uint16_t | m, | ||
const size_t | k, | ||
uint16_t *const | decoded | ||
) |
Decode a 16-bit LSB-encoded value.
See d_lsb_decode32 for details.
lsb | The LSB object used to decode |
m | The LSB value to decode |
k | The length of the LSB value to decode |
decoded | OUT: The decoded value |
References d_lsb_decode32().
Referenced by decode_uo0(), decode_uo1(), decode_uor2(), and main().
int d_lsb_decode32 | ( | const struct d_lsb_decode *const | lsb, |
const uint32_t | m, | ||
const size_t | k, | ||
uint32_t *const | decoded | ||
) |
Decode a 32-bit LSB-encoded value.
See 4.5.1 in the RFC 3095 for details about LSB encoding.
lsb | The LSB object used to decode |
m | The LSB value to decode |
k | The length of the LSB value to decode |
decoded | OUT: The decoded value |
References f(), d_lsb_decode::p, and d_lsb_decode::v_ref_d.
Referenced by d_lsb_decode16(), and ts_decode_scaled().
void d_lsb_init | ( | struct d_lsb_decode *const | lsb, |
const uint32_t | v_ref_d, | ||
const short | p | ||
) |
Initialize a Least Significant Bits (LSB) encoding object.
See 4.5.1 in the RFC 3095 for details about LSB encoding.
lsb | The LSB object to initialize |
v_ref_d | The reference value |
p | The p value used to efficiently encode the values |
References d_lsb_decode::old_v_ref_d, d_lsb_decode::p, and d_lsb_decode::v_ref_d.
Referenced by d_create_sc(), ip_decode_dynamic_ip(), main(), and rtp_decode_dynamic_rtp().
void d_lsb_sync_ref | ( | struct d_lsb_decode *const | lsb | ) |
Replace the previous LSB reference value with the current one.
lsb | The LSB object |
References d_lsb_decode::old_v_ref_d, and d_lsb_decode::v_ref_d.
Referenced by decode_uo0(), decode_uo1(), decode_uor2(), and ts_update_context().
void d_lsb_update | ( | struct d_lsb_decode *const | lsb, |
const uint32_t | v_ref_d | ||
) |
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.
lsb | The LSB object |
v_ref_d | The new reference value |
References d_lsb_decode::v_ref_d.
Referenced by decode_uo0(), decode_uo1(), decode_uor2(), main(), and ts_update_context().