6 typedef int8_t sbit_t; /* soft bit (-127...127) */
7 typedef uint8_t ubit_t; /* unpacked bit (0 or 1) */
8 typedef uint8_t pbit_t; /* packed bis (8 bits in a byte) */
11 NOTE on the endianess of pbit_t:
12 Bits in a pbit_t are ordered MSB first, i.e. 0x80 is the first bit.
13 Bit i in a pbit_t array is array[i/8] & (1<<(7-i%8))
16 /* determine how many bytes we would need for 'num_bits' packed bits */
17 static inline unsigned int osmo_pbit_bytesize(unsigned int num_bits)
19 unsigned int pbit_bytesize = num_bits / 8;
27 /* convert unpacked bits to packed bits, return length in bytes */
28 int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits);
30 /* convert packed bits to unpacked bits, return length in bytes */
31 int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits);
33 /* convert unpacked bits to packed bits (extended options but slower),
34 * return length in bytes (max written ofs of output buffer + 1) */
35 int osmo_ubit2pbit_ext(pbit_t *out, unsigned int out_ofs,
36 const ubit_t *in, unsigned int in_ofs,
37 unsigned int num_bits, int lsb_mode);
39 /* convert packed bits to unpacked bits (extended options but slower),
40 * return length in bytes (max written ofs of output buffer + 1) */
41 int osmo_pbit2ubit_ext(ubit_t *out, unsigned int out_ofs,
42 const pbit_t *in, unsigned int in_ofs,
43 unsigned int num_bits, int lsb_mode);