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                 unsigned char *mtf;
 103                 unsigned char *salida, *data;
 104                 unsigned 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(unsigned char)*pagesize);
 113                 salida = malloc(sizeof(unsigned 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                         /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
 134                         mtf = jacu_mtf(salida+sizeof(Uint32), i+sizeof(Uint32), &z, &z_len);
 135
 136                         /* Si me lo piden, aplico ZG. */
 137                         if (zflag) {
 138                                 size_t len;
 139                                 char buff[2];
 140                                 ZG zg;
 141                                 zg_init(&zg);
 142                                 /* TODO HACER LO MISMO QUE EN EL ELSE XXX */
 143                                 for (j = 0; j < i; ++j)
 144                                         if ((len = zg_group(&zg, buff, mtf[j]))) shuff_scanfreq_chunk(shuff,buff,len);
 145                         } else {
 146                                 /* Guardo el PageSize */
 147                                 shuff_scanfreq_chunk(shuff,salida,sizeof(Uint32));
 148
 149                                 /* Guardo el Z len y el Z */
 150                                 shuff_scanfreq_chunk(shuff,(char*)&z_len,sizeof(int));
 151                                 shuff_scanfreq_chunk(shuff,z,z_len);
 152
 153                                 /* Guardo la salida del MTF */
 154                                 shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
 155                         }
 156                         free(mtf);
 157                         free(z);
 158                 }
 159
 160                 /* Limpiando */
 161                 fclose(fp);
 162                 bs_destroy(bs);
 163
 164                 /* Comprimo con Huffman */
 165                 shuff_encode_file(shuff);
 166                 if (sflag == 1) shuff_savemodel(shuff);
 167                 /* Shutdown Huffman */
 168                 shuff_deinit_encoder(shuff);
 169                 free(shuff);
 170
 171                 /* Muestro bpb */
 172                 printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
 173                 return 0;
 174         }
 175
 176         if (dflag == 1) {
 177                 /* Descomprimo */
 178                 FILE *fp_out;
 179                 /*FILE *fp_in;*/
 180                 Uint32 block_size, k;
 181                 unsigned char *block, *mtf, *orig;
 182                 unsigned char *z;
 183                 int z_len,moredata = 0,decoded = 0;
 184
 185                 /* Inicializo el descompresor */
 186                 if ((shuff = shuff_init_decoder(argv[optind],NULL)) == NULL) return 1;
 187
 188                 /* Abrimos el archivo de salida */
 189                 fp_out = fopen(argv[optind+1], "wb");
 190
 191                 /* Descomprimimos de a chunks segun convenga */
 192                 do {
 193                         block_size = 0;
 194                         moredata = shuff_decode_chunk(shuff,(char*)&block_size,sizeof(Uint32),&decoded);
 195                         if (block_size > 0) {
 196                                 moredata = shuff_decode_chunk(shuff,(char*)&z_len,sizeof(int),&decoded);
 197                                 z = malloc(sizeof(unsigned char)*z_len);
 198                                 moredata = shuff_decode_chunk(shuff,z,z_len,&decoded);
 199
 200                                 block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32));
 201                                 orig = malloc(block_size*sizeof(unsigned char));
 202                                 moredata = shuff_decode_chunk(shuff,block,block_size+sizeof(Uint32),&decoded);
 203
 204                                 mtf = jacu_mtf_inv(z, block, block_size*sizeof(unsigned char)+sizeof(Uint32));
 205
 206                                 /* Luego de hacer el MTF inverso ya puedo recuperar el k */
 207                                 memcpy(&k, mtf, sizeof(Uint32));
 208
 209                                 /*printf("Restored : k=%ld\n", k);*/
 210                                 bs_restore(orig, mtf+sizeof(Uint32), k, block_size);
 211
 212                                 fwrite(orig, block_size, sizeof(unsigned char), fp_out);
 213                                 free(block);
 214                                 free(orig);
 215                                 free(mtf);
 216                                 free(z);
 217                         }
 218                 } while (moredata);
 219
 220                 /* Close up files */
 221                 fclose(fp_out);
 222
 223                 /* Shutdown Huffman */
 224                 shuff_deinit_decoder(shuff);
 225                 free(shuff);
 226         }
 227
 228         return 0;
 229 }
 230
 231 long get_file_size(const char* filename)
 232 {
 233         FILE* file;
 234         long  file_size;
 235
 236         if (!(file = fopen(filename, "ab"))) return -1;
 237         file_size = ftell(file);
 238         fclose(file);
 239         return file_size;
 240 }