71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include "interleave.h"
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int
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interleave_init(INTERLEAVE_CTX *ictx, int size, int block_size)
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{
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ictx->trans_size = size;
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ictx->trans = (unsigned short *)malloc(size * sizeof *ictx->trans);
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// DEBUGF("size: %d\n", size);
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// DEBUGF("Block size: %d\n", block_size);
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int j, k, B;
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for (k = 0; k < size; k++)
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{
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B = k % 4;
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j = 2 * ((49 * k) % 57) + ((k % 8) / 4);
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ictx->trans[k] = B * block_size + j;
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/* Mapping: pos1 goes to pos2: pos1 -> pos2 */
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//printf("%d -> %d\n", ictx->trans[k], k);
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}
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// exit(0);
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return 0;
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}
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int
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interleave_init_facch_f(INTERLEAVE_CTX *ictx, int size, int block_size, int block_offset)
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{
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ictx->trans_size = size;
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ictx->trans = (unsigned short *)malloc(size * sizeof *ictx->trans);
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// DEBUGF("size: %d\n", size);
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// DEBUGF("Block size: %d\n", block_size);
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int j, k, B;
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for (k = 0; k < size; k++)
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{
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B = (k + block_offset) % 8;
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j = 2 * ((49 * k) % 57) + ((k % 8) / 4);
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ictx->trans[k] = B * block_size + j;
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/* Mapping: pos1 goes to pos2: pos1 -> pos2 */
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// DEBUGF("%d -> %d\n", ictx->trans[k], k);
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}
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// exit(0);
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return 0;
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}
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int
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interleave_deinit(INTERLEAVE_CTX *ictx)
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{
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if (ictx->trans != NULL)
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{
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free(ictx->trans);
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ictx->trans = NULL;
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}
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return 0;
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}
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void
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interleave_decode(INTERLEAVE_CTX *ictx, unsigned char *dst, unsigned char *src)
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{
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printf("Lol\n");
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int k;
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for (k = 0; k < ictx->trans_size; k++)
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{
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printf("k=%d, ictx->trans[k]=%d\n", k, ictx->trans[k]);
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dst[k] = src[ictx->trans[k]];
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}
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}
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