piotr | faacc72 | 2014-07-20 23:48:32 +0200 | [diff] [blame] | 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include "interleave.h" |
| 4 | |
| 5 | int |
| 6 | interleave_init(INTERLEAVE_CTX *ictx, int size, int block_size) |
| 7 | { |
| 8 | ictx->trans_size = size; |
| 9 | ictx->trans = (unsigned short *)malloc(size * sizeof *ictx->trans); |
| 10 | |
| 11 | // DEBUGF("size: %d\n", size); |
| 12 | // DEBUGF("Block size: %d\n", block_size); |
| 13 | int j, k, B; |
| 14 | for (k = 0; k < size; k++) |
| 15 | { |
| 16 | B = k % 4; |
| 17 | j = 2 * ((49 * k) % 57) + ((k % 8) / 4); |
| 18 | ictx->trans[k] = B * block_size + j; |
| 19 | /* Mapping: pos1 goes to pos2: pos1 -> pos2 */ |
| 20 | //printf("%d -> %d\n", ictx->trans[k], k); |
| 21 | } |
| 22 | // exit(0); |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | int |
| 27 | interleave_init_facch_f(INTERLEAVE_CTX *ictx, int size, int block_size, int block_offset) |
| 28 | { |
| 29 | ictx->trans_size = size; |
| 30 | ictx->trans = (unsigned short *)malloc(size * sizeof *ictx->trans); |
| 31 | |
| 32 | // DEBUGF("size: %d\n", size); |
| 33 | // DEBUGF("Block size: %d\n", block_size); |
| 34 | int j, k, B; |
| 35 | for (k = 0; k < size; k++) |
| 36 | { |
| 37 | B = (k + block_offset) % 8; |
| 38 | j = 2 * ((49 * k) % 57) + ((k % 8) / 4); |
| 39 | ictx->trans[k] = B * block_size + j; |
| 40 | /* Mapping: pos1 goes to pos2: pos1 -> pos2 */ |
| 41 | // DEBUGF("%d -> %d\n", ictx->trans[k], k); |
| 42 | } |
| 43 | // exit(0); |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | int |
| 48 | interleave_deinit(INTERLEAVE_CTX *ictx) |
| 49 | { |
| 50 | if (ictx->trans != NULL) |
| 51 | { |
| 52 | free(ictx->trans); |
| 53 | ictx->trans = NULL; |
| 54 | } |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | void |
| 60 | interleave_decode(INTERLEAVE_CTX *ictx, unsigned char *dst, unsigned char *src) |
| 61 | { |
| 62 | printf("Lol\n"); |
| 63 | int k; |
| 64 | for (k = 0; k < ictx->trans_size; k++) |
| 65 | { |
| 66 | printf("k=%d, ictx->trans[k]=%d\n", k, ictx->trans[k]); |
| 67 | dst[k] = src[ictx->trans[k]]; |
| 68 | } |
| 69 | } |
| 70 | |