#include <stdint.h> | |
#include "flip_bits.h" | |
static uint8_t flip_table[256]; | |
void init_flip_bits(void) | |
{ | |
int i,k; | |
for (i = 0 ; i < 256 ; i++) { | |
uint8_t sample = 0 ; | |
for (k = 0; k<8; k++) { | |
if ( i & 1 << k ) sample |= 0x80 >> k; | |
} | |
flip_table[i] = sample; | |
} | |
} | |
uint8_t *flip_buf_bits(uint8_t *out, const uint8_t *in, int len) | |
{ | |
int i; | |
for (i = 0 ; i < len; i++) { | |
out[i] = flip_table[(uint8_t)in[i]]; | |
} | |
return out; | |
} |