src/jacu.c

   1
   2 #include "blocksorting/bs.h"
   3 #include "mtf/mtf.h"
   4 #include "zerogrouping/zerogrouping.h"
   5 #include "statichuff/statichuff.h"
   6 #include "vfile/vfile.h"
   7 #include "vfile/common.h"
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11
  12 long get_file_size(const char* filename);
  13
  14 int main(int argc, char* argv[])
  15 {
  16         int cflag = 0;
  17         int dflag = 0;
  18         int zflag = 0;
  19         int tflag = 0;
  20         int qflag = 0;
  21         int sflag = 0;
  22         int mflag = 0;
  23         long int volumesize = 0;
  24         size_t pagesize = 32768; /* 32KB */
  25         int ch;
  26         t_BlockSort *bs;
  27         HUFF_STATE *shuff;
  28         char *staticmodel = NULL;
  29
  30         while ((ch = getopt(argc, argv, "scdzm:t:q:")) != -1) {
  31
  32                 switch (ch) {
  33                         case 'c': cflag = 1;
  34                                           break;
  35
  36                         case 'd': dflag = 1;
  37                                           break;
  38
  39                         case 'z': zflag = 1;
  40                                           break;
  41
  42                         case 'm': mflag = 1;
  43                                           staticmodel = optarg;
  44                                           break;
  45
  46                         case 's': sflag = 1;
  47                                           break;
  48
  49                         case 't': tflag = 1;
  50                                 volumesize = atol(optarg);
  51                                 break;
  52
  53                         case 'q': qflag = 1;
  54                                 switch (atoi(optarg))
  55                                 {
  56                                         case 0: pagesize = 1024; /* 1K */
  57                                                 break;
  58                                         case 1: pagesize = 2048; /* 2K */
  59                                                 break;
  60                                         case 2: pagesize = 4096; /* 4K */
  61                                                 break;
  62                                         case 3: pagesize = 8192; /* 8K */
  63                                                 break;
  64                                         case 4: pagesize = 16384; /* 16K */
  65                                                 break;
  66                                         case 5: pagesize = 32768; /* 32K */
  67                                                 break;
  68                                         case 6: pagesize = 65536; /* 64K */
  69                                                 break;
  70                                         case 7: pagesize = 131072; /* 128K */
  71                                                 break;
  72                                         case 8: pagesize = 262144; /* 256K */
  73                                                 break;
  74                                         case 9: pagesize = 524288; /* 512K */
  75                                                 break;
  76                                         default: pagesize = 0; /* error */
  77                                 }
  78                                 break;
  79
  80                         default: fprintf(stderr, "Usage: %s [-cdzs][-q blksize][-t volsize][-m modeldumpfile] source target\n", argv[0]);
  81                                          return(2);
  82                 }
  83         }
  84
  85         if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) || (mflag & sflag)) {
  86                 fprintf(stderr, "Usage: %s [-cdzs][-q blksize][-t volsize][-m modeldumpfile] source target\n", argv[0]);
  87                 return (3);
  88         }
  89         if ((tflag) && (volumesize <= 0l)) {
  90                 fprintf(stderr,"Error: The volume size must be a non-zero value\n");
  91                 return (4);
  92         }
  93         if ((qflag) && (pagesize <= 1u)) {
  94                 fprintf(stderr,"Error: El nivel de compresión debe ser entre 0 (menor) y 9 (mayor).\n");
  95                 return (5);
  96         }
  97
  98         if (cflag == 1) {
  99                 /* Comprimo */
 100                 FILE *fp;
 101                 Uint32 i, j, total, k;
 102                 char *mtf;
 103                 char *salida, *data;
 104                 char *z;
 105                 int z_len;
 106
 107                 /* Preparo el compresor huffman */
 108                 if ((shuff = shuff_init_encoder_bychunk(argv[optind+1],volumesize*1024)) == NULL) return 0;
 109                 if (mflag == 1) shuff_loadmodel(shuff,staticmodel);
 110
 111                 /* Preparo el BS alocando mem para el K, el Block y su Size */
 112                 data = malloc(sizeof(char)*pagesize);
 113                 salida = malloc(sizeof(char)*pagesize+sizeof(Uint32)*2);
 114                 bs = bs_create(pagesize);
 115
 116                 /* Abrimos el archivo a comprimir y encodeamos bloques */
 117                 fp = fopen(argv[optind], "rb");
 118
 119                 total = 0;
 120                 while (!feof(fp)) {
 121                         i = 0;
 122                         while ((!feof(fp)) && (i < pagesize)) {
 123                                 data[i++] = fgetc(fp);
 124                                 total++;
 125                         }
 126
 127                         /* Saco un EOF que lee de mas */
 128                         if (i<pagesize) i--;
 129
 130                         /* Aplico el BlockSorting */
 131                         bs_solve(data, salida, bs, &k, i);
 132
 133                         /*printf("BS k=%ld\n", *(Uint32 *)(salida+sizeof(Uint32)));
 134                         printf("PageSize = %ld\n", *(Uint32 *)salida);
 135
 136                         printf("Antes de MTF = %ld [", i);
 137                         {
 138                                 int ii;
 139                                 for(ii=0; ii<(i+sizeof(Uint32)); ii++)
 140                                         printf("(%c)", salida[ii+sizeof(Uint32)]);
 141                                 printf("]\n");
 142                         }*/
 143
 144                         /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
 145                         mtf = jacu_mtf(salida+sizeof(Uint32), i+sizeof(Uint32), &z, &z_len);
 146 /*
 147                         printf("MTF Z (len=%d) = [", z_len);
 148                         {
 149                                 int ii;
 150                                 for(ii=0; ii<z_len; ii++)
 151                                         printf("(%c)", z[ii]);
 152                                 printf("]\n");
 153
 154                         }*/
 155                         /* Si me lo piden, aplico ZG. */
 156                         if (zflag) {
 157                                 size_t len;
 158                                 char buff[2];
 159                                 ZG zg;
 160                                 zg_init(&zg);
 161                                 /* TODO HACER LO MISMO QUE EN EL ELSE XXX */
 162                                 for (j = 0; j < i; ++j)
 163                                         if ((len = zg_group(&zg, buff, mtf[j]))) shuff_scanfreq_chunk(shuff,buff,len);
 164                         } else {
 165                                 /* Guardo el PageSize */
 166                                 shuff_scanfreq_chunk(shuff,salida,sizeof(Uint32));
 167
 168                                 /* Guardo el Z len y el Z */
 169                                 shuff_scanfreq_chunk(shuff,(char*)&z_len,sizeof(int));
 170                                 shuff_scanfreq_chunk(shuff,z,z_len);
 171
 172                                 /* Guardo la salida del MTF */
 173                                 shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
 174                         }
 175                         free(mtf);
 176                         free(z);
 177                 }
 178
 179                 /* Limpiando */
 180                 fclose(fp);
 181                 bs_destroy(bs);
 182
 183                 /* Comprimo con Huffman */
 184                 shuff_encode_file(shuff);
 185                 if (sflag == 1) shuff_savemodel(shuff);
 186                 /* Shutdown Huffman */
 187                 shuff_deinit_encoder(shuff);
 188                 free(shuff);
 189
 190                 /* Muestro bpb */
 191                 printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
 192                 return 0;
 193         }
 194
 195         if (dflag == 1) {
 196                 /* Descomprimo */
 197                 FILE *fp_out;
 198                 FILE *fp_in;
 199                 Uint32 block_size, k;
 200                 char *block, *mtf, *orig;
 201                 char *z;
 202                 int z_len;
 203
 204                 if ((shuff = shuff_init_decoder(argv[optind],"tmp.comp")) == NULL) return 1;
 205                 shuff_decode_file(shuff);
 206                 shuff_deinit_decoder(shuff);
 207                 free(shuff);
 208
 209                 fp_in = fopen("tmp.comp", "rb");
 210                 fp_out = fopen(argv[optind+1], "wb");
 211
 212                 while (!feof(fp_in)) {
 213                         block_size = 0;
 214                         fread(&block_size, sizeof(Uint32), 1, fp_in);
 215                         if (block_size > 0) {
 216                                 fread(&z_len, sizeof(int), 1, fp_in);
 217                                 z = malloc(sizeof(char)*z_len);
 218                                 fread(z, z_len, sizeof(char), fp_in);
 219
 220                                 /*printf("MTF Z (len=%d) = [", z_len);
 221                                 {
 222                                         int ii;
 223                                         for(ii=0; ii<z_len; ii++)
 224                                                 printf("(%c)", z[ii]);
 225                                         printf("]\n");
 226
 227                                 }*/
 228
 229                                 block = malloc(block_size*sizeof(char)+sizeof(Uint32));
 230                                 orig = malloc(block_size*sizeof(char));
 231                                 fread(block, block_size+sizeof(Uint32), sizeof(char), fp_in);
 232
 233                                 /*printf("Antes MTF_inv = [");
 234                                 {
 235                                         int ii;
 236                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 237                                                 printf("(%c)", block[ii]);
 238                                         printf("]\n");
 239                                 }*/
 240                                 /* Hago el MTF inverso */
 241                                 mtf = jacu_mtf_inv(z, block, block_size*sizeof(char)+sizeof(Uint32));
 242
 243                                 /*printf("Luego de MTF Inv= [");
 244                                 {
 245                                         int ii;
 246                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 247                                                 printf("(%c)", mtf[ii]);
 248                                         printf("]\n");
 249                                 }*/
 250
 251                                 /* Luego de hacer el MTF inverso ya puedo recuperar el k */
 252                                 memcpy(&k, mtf, sizeof(Uint32));
 253
 254                                 /*printf("Restored : k=%ld\n", k);*/
 255                                 bs_restore(orig, mtf+sizeof(Uint32), k, block_size);
 256
 257                                 fwrite(orig, block_size, sizeof(char), fp_out);
 258                                 free(block);
 259                                 free(orig);
 260                                 free(mtf);
 261                                 free(z);
 262                         }
 263                 }
 264                 fclose(fp_in);
 265                 fclose(fp_out);
 266         }
 267
 268         return 0;
 269 }
 270
 271 long get_file_size(const char* filename)
 272 {
 273         FILE* file;
 274         long  file_size;
 275
 276         if (!(file = fopen(filename, "ab"))) return -1;
 277         file_size = ftell(file);
 278         fclose(file);
 279         return file_size;
 280 }