Osmocom Packet control Unit (PCU): Network-side GPRS (RLC/MAC); BTS- or BSC-colocated https://osmocom.org/projects/osmopcu
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
osmo-pcu/src/egprs_rlc_compression.h

33 lines
940 B

/* egprs_rlc_compression.h
* Routines for EGPRS RLC bitmap compression handling
*/
#pragma once
struct egprs_compress_node;
#define MOD64(X) (((X) + 64) & 0x3F)
/* Singleton to manage the EGPRS compression algorithm. */
class egprs_compress
{
public:
static int decompress_crbb(int8_t compress_bmap_len,
bool start, const uint8_t *orig_buf,
bitvec *dest);
egprs_compress();
int osmo_t4_compress(struct bitvec *bv);
static int compress_rbb(struct bitvec *urbb_vec, struct bitvec *crbb_vec,
uint8_t *uclen_crbb, uint8_t max_bits);
private:
egprs_compress_node *ones_list;
egprs_compress_node *zeros_list;
void decode_tree_init(void);
static egprs_compress *s_instance;
static egprs_compress*instance();
egprs_compress_node *create_tree_node(void *);
void build_codewords(egprs_compress_node *root, const char *cdwd[]);
/* singleton class, so this private destructor is left unimplemented. */
~egprs_compress();
};