mp3lib/sr1.c

   1 // #define NEWBUFFERING
   2 //#define DEBUG_RESYNC
   3
   4 /* 1 frame = 4608 byte PCM */
   5
   6 #define LOCAL static inline
   7
   8 //#undef LOCAL
   9 //#define LOCAL
  10
  11 #include        <stdlib.h>
  12 #include        <stdio.h>
  13 #include        <string.h>
  14 #include        <math.h>
  15
  16 #define real float
  17 // #define int long
  18
  19 #include "mpg123.h"
  20 #include "huffman.h"
  21 #include "mp3.h"
  22 #include "libavutil/common.h"
  23 #include "libavutil/internal.h"
  24 #include "mpbswap.h"
  25 #include "cpudetect.h"
  26 //#include "liba52/mm_accel.h"
  27 #include "mp_msg.h"
  28
  29 #include "libvo/fastmemcpy.h"
  30
  31 #undef fprintf
  32 #undef printf
  33
  34 #if ARCH_X86_64
  35 // 3DNow! and 3DNow!Ext routines don't compile under AMD64
  36 #undef HAVE_AMD3DNOW
  37 #undef HAVE_AMD3DNOWEXT
  38 #define HAVE_AMD3DNOW 0
  39 #define HAVE_AMD3DNOWEXT 0
  40 #endif
  41
  42 //static FILE* mp3_file=NULL;
  43
  44 int MP3_frames=0;
  45 int MP3_eof=0;
  46 int MP3_pause=0;
  47 int MP3_filesize=0;
  48 int MP3_fpos=0;      // current file position
  49 int MP3_framesize=0; // current framesize
  50 int MP3_bitrate=0;   // current bitrate
  51 int MP3_samplerate=0;  // current samplerate
  52 int MP3_resync=0;
  53 int MP3_channels=0;
  54 int MP3_bps=2;
  55
  56 static long outscale = 32768;
  57 #include "tabinit.c"
  58
  59 #if 1
  60 int mplayer_audio_read(char *buf,int size);
  61
  62 LOCAL int mp3_read(char *buf,int size){
  63 //  int len=fread(buf,1,size,mp3_file);
  64   int len=mplayer_audio_read(buf,size);
  65   if(len>0) MP3_fpos+=len;
  66 //  if(len!=size) MP3_eof=1;
  67   return len;
  68 }
  69 #else
  70 int mp3_read(char *buf,int size);
  71 #endif
  72 /*
  73  * Modified for use with MPlayer, for details see the changelog at
  74  * http://svn.mplayerhq.hu/mplayer/trunk/
  75  * $Id$
  76  */
  77
  78
  79 //void mp3_seek(int pos){
  80 //  fseek(mp3_file,pos,SEEK_SET);
  81 //  return (MP3_fpos=ftell(mp3_file));
  82 //}
  83
  84 /*       Frame reader           */
  85
  86 #define MAXFRAMESIZE 1280
  87 #define MAXFRAMESIZE2 (512+MAXFRAMESIZE)
  88
  89 static int fsizeold=0,ssize=0;
  90 static unsigned char bsspace[2][MAXFRAMESIZE2]; /* !!!!! */
  91 static unsigned char *bsbufold=bsspace[0]+512;
  92 static unsigned char *bsbuf=bsspace[1]+512;
  93 static int bsnum=0;
  94
  95 static int bitindex;
  96 static unsigned char *wordpointer;
  97 static int bitsleft;
  98
  99 static unsigned char *pcm_sample;   /* outbuffer address */
 100 static int pcm_point = 0;           /* outbuffer offset */
 101
 102 static struct frame fr;
 103
 104 static int tabsel_123[2][3][16] = {
 105    { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
 106      {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
 107      {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
 108
 109    { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
 110      {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
 111      {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
 112 };
 113
 114 static int freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
 115
 116 LOCAL unsigned int getbits(short number_of_bits)
 117 {
 118   unsigned rval;
 119 //  if(MP3_frames>=7741) printf("getbits: bits=%d  bitsleft=%d  wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
 120   if((bitsleft-=number_of_bits)<0) return 0;
 121   if(!number_of_bits) return 0;
 122          rval = wordpointer[0];
 123          rval <<= 8;
 124          rval |= wordpointer[1];
 125          rval <<= 8;
 126          rval |= wordpointer[2];
 127          rval <<= bitindex;
 128          rval &= 0xffffff;
 129          bitindex += number_of_bits;
 130          rval >>= (24-number_of_bits);
 131          wordpointer += (bitindex>>3);
 132          bitindex &= 7;
 133   return rval;
 134 }
 135
 136
 137 LOCAL unsigned int getbits_fast(short number_of_bits)
 138 {
 139   unsigned rval;
 140 //  if(MP3_frames>=7741) printf("getbits_fast: bits=%d  bitsleft=%d  wordptr=%x\n",number_of_bits,bitsleft,wordpointer);
 141   if((bitsleft-=number_of_bits)<0) return 0;
 142   if(!number_of_bits) return 0;
 143 #if ARCH_X86
 144   rval = bswap_16(*((uint16_t *)wordpointer));
 145 #else
 146   /*
 147    * we may not be able to address unaligned 16-bit data on non-x86 cpus.
 148    * Fall back to some portable code.
 149    */
 150   rval = wordpointer[0] << 8 | wordpointer[1];
 151 #endif
 152          rval <<= bitindex;
 153          rval &= 0xffff;
 154          bitindex += number_of_bits;
 155          rval >>= (16-number_of_bits);
 156          wordpointer += (bitindex>>3);
 157          bitindex &= 7;
 158   return rval;
 159 }
 160
 161 LOCAL unsigned int get1bit(void)
 162 {
 163   unsigned char rval;
 164 //  if(MP3_frames>=7741) printf("get1bit: bitsleft=%d  wordptr=%x\n",bitsleft,wordpointer);
 165   if((--bitsleft)<0) return 0;
 166   rval = *wordpointer << bitindex;
 167   bitindex++;
 168   wordpointer += (bitindex>>3);
 169   bitindex &= 7;
 170   return ((rval>>7)&1);
 171 }
 172
 173 LOCAL void set_pointer(int backstep)
 174 {
 175 //  if(backstep!=512 && backstep>fsizeold)
 176 //    printf("\rWarning! backstep (%d>%d)                                         \n",backstep,fsizeold);
 177   wordpointer = bsbuf + ssize - backstep;
 178   if (backstep) fast_memcpy(wordpointer,bsbufold+fsizeold-backstep,backstep);
 179   bitindex = 0;
 180   bitsleft+=8*backstep;
 181 //  printf("Backstep %d  (bitsleft=%d)\n",backstep,bitsleft);
 182 }
 183
 184 LOCAL int stream_head_read(unsigned char *hbuf,uint32_t *newhead){
 185   if(mp3_read(hbuf,4) != 4) return FALSE;
 186 #if ARCH_X86
 187   *newhead = bswap_32(*((uint32_t*)hbuf));
 188 #else
 189   /*
 190    * we may not be able to address unaligned 32-bit data on non-x86 cpus.
 191    * Fall back to some portable code.
 192    */
 193   *newhead =
 194       hbuf[0] << 24 |
 195       hbuf[1] << 16 |
 196       hbuf[2] <<  8 |
 197       hbuf[3];
 198 #endif
 199   return TRUE;
 200 }
 201
 202 LOCAL int stream_head_shift(unsigned char *hbuf,uint32_t *head){
 203   *((uint32_t*)hbuf) >>= 8;
 204   if(mp3_read(hbuf+3,1) != 1) return 0;
 205   *head <<= 8;
 206   *head |= hbuf[3];
 207   return 1;
 208 }
 209
 210 /*
 211  * decode a header and write the information
 212  * into the frame structure
 213  */
 214 LOCAL int decode_header(struct frame *fr,uint32_t newhead){
 215
 216     // head_check:
 217     if( (newhead & 0xffe00000) != 0xffe00000 ||
 218         (newhead & 0x0000fc00) == 0x0000fc00) return FALSE;
 219
 220     fr->lay = 4-((newhead>>17)&3);
 221 //    if(fr->lay!=3) return FALSE;
 222
 223     if( newhead & (1<<20) ) {
 224       fr->lsf = (newhead & (1<<19)) ? 0x0 : 0x1;
 225       fr->mpeg25 = 0;
 226     } else {
 227       fr->lsf = 1;
 228       fr->mpeg25 = 1;
 229     }
 230
 231     if(fr->mpeg25)
 232       fr->sampling_frequency = 6 + ((newhead>>10)&0x3);
 233     else
 234       fr->sampling_frequency = ((newhead>>10)&0x3) + (fr->lsf*3);
 235
 236     if(fr->sampling_frequency>8) return FALSE;  // valid: 0..8
 237
 238     fr->error_protection = ((newhead>>16)&0x1)^0x1;
 239     fr->bitrate_index = ((newhead>>12)&0xf);
 240     fr->padding   = ((newhead>>9)&0x1);
 241     fr->extension = ((newhead>>8)&0x1);
 242     fr->mode      = ((newhead>>6)&0x3);
 243     fr->mode_ext  = ((newhead>>4)&0x3);
 244     fr->copyright = ((newhead>>3)&0x1);
 245     fr->original  = ((newhead>>2)&0x1);
 246     fr->emphasis  = newhead & 0x3;
 247
 248     MP3_channels = fr->stereo    = (fr->mode == MPG_MD_MONO) ? 1 : 2;
 249
 250     if(!fr->bitrate_index){
 251 //      fprintf(stderr,"Free format not supported.\n");
 252       return FALSE;
 253     }
 254
 255 switch(fr->lay){
 256   case 2:
 257     MP3_bitrate=tabsel_123[fr->lsf][1][fr->bitrate_index];
 258     MP3_samplerate=freqs[fr->sampling_frequency];
 259     fr->framesize = MP3_bitrate * 144000;
 260     fr->framesize /= MP3_samplerate;
 261     MP3_framesize=fr->framesize;
 262     fr->framesize += fr->padding - 4;
 263     break;
 264   case 3:
 265     if(fr->lsf)
 266       ssize = (fr->stereo == 1) ? 9 : 17;
 267     else
 268       ssize = (fr->stereo == 1) ? 17 : 32;
 269     if(fr->error_protection) ssize += 2;
 270
 271     MP3_bitrate=tabsel_123[fr->lsf][2][fr->bitrate_index];
 272     MP3_samplerate=freqs[fr->sampling_frequency];
 273     fr->framesize  = MP3_bitrate * 144000;
 274     fr->framesize /= MP3_samplerate<<(fr->lsf);
 275     MP3_framesize=fr->framesize;
 276     fr->framesize += fr->padding - 4;
 277     break;
 278   case 1:
 279 //    fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ? (fr->mode_ext<<2)+4 : 32;
 280     MP3_bitrate=tabsel_123[fr->lsf][0][fr->bitrate_index];
 281     MP3_samplerate=freqs[fr->sampling_frequency];
 282     fr->framesize  = MP3_bitrate * 12000;
 283     fr->framesize /= MP3_samplerate;
 284     MP3_framesize  = ((fr->framesize+fr->padding)<<2);
 285     fr->framesize  = MP3_framesize-4;
 286 //    printf("framesize=%d\n",fr->framesize);
 287     break;
 288   default:
 289     MP3_framesize=fr->framesize=0;
 290 //    fprintf(stderr,"Sorry, unsupported layer type.\n");
 291     return 0;
 292 }
 293     if(fr->framesize<=0 || fr->framesize>MAXFRAMESIZE) return FALSE;
 294
 295     return 1;
 296 }
 297
 298
 299 LOCAL int stream_read_frame_body(int size){
 300
 301   /* flip/init buffer for Layer 3 */
 302   bsbufold = bsbuf;
 303   bsbuf = bsspace[bsnum]+512;
 304   bsnum = (bsnum + 1) & 1;
 305
 306   if( mp3_read(bsbuf,size) != size) return 0; // broken frame
 307
 308   bitindex = 0;
 309   wordpointer = (unsigned char *) bsbuf;
 310   bitsleft=8*size;
 311
 312   return 1;
 313 }
 314
 315
 316 /*****************************************************************
 317  * read next frame     return number of frames read.
 318  */
 319 LOCAL int read_frame(struct frame *fr){
 320   uint32_t newhead;
 321   union {
 322     unsigned char buf[8];
 323     unsigned long dummy; // for alignment
 324   } hbuf;
 325   int skipped,resyncpos;
 326   int frames=0;
 327
 328 resync:
 329   skipped=MP3_fpos;
 330   resyncpos=MP3_fpos;
 331
 332   set_pointer(512);
 333   fsizeold=fr->framesize;       /* for Layer3 */
 334   if(!stream_head_read(hbuf.buf,&newhead)) return 0;
 335   if(!decode_header(fr,newhead)){
 336     // invalid header! try to resync stream!
 337 #ifdef DEBUG_RESYNC
 338     printf("ReSync: searching for a valid header...  (pos=%X)\n",MP3_fpos);
 339 #endif
 340 retry1:
 341     while(!decode_header(fr,newhead)){
 342       if(!stream_head_shift(hbuf.buf,&newhead)) return 0;
 343     }
 344     resyncpos=MP3_fpos-4;
 345     // found valid header
 346 #ifdef DEBUG_RESYNC
 347     printf("ReSync: found valid hdr at %X  fsize=%ld  ",resyncpos,fr->framesize);
 348 #endif
 349     if(!stream_read_frame_body(fr->framesize)) return 0; // read body
 350     set_pointer(512);
 351     fsizeold=fr->framesize;       /* for Layer3 */
 352     if(!stream_head_read(hbuf.buf,&newhead)) return 0;
 353     if(!decode_header(fr,newhead)){
 354       // invalid hdr! go back...
 355 #ifdef DEBUG_RESYNC
 356       printf("INVALID\n");
 357 #endif
 358 //      mp3_seek(resyncpos+1);
 359       if(!stream_head_read(hbuf.buf,&newhead)) return 0;
 360       goto retry1;
 361     }
 362 #ifdef DEBUG_RESYNC
 363     printf("OK!\n");
 364     ++frames;
 365 #endif
 366   }
 367
 368   skipped=resyncpos-skipped;
 369 //  if(skipped && !MP3_resync) printf("\r%d bad bytes skipped  (resync at 0x%X)                          \n",skipped,resyncpos);
 370
 371 //  printf("%8X [%08X] %d %d (%d)%s%s\n",MP3_fpos-4,newhead,fr->framesize,fr->mode,fr->mode_ext,fr->error_protection?" CRC":"",fr->padding?" PAD":"");
 372
 373   /* read main data into memory */
 374   if(!stream_read_frame_body(fr->framesize)){
 375     printf("\nBroken frame at 0x%X                                                  \n",resyncpos);
 376     return 0;
 377   }
 378   ++frames;
 379
 380   if(MP3_resync){
 381     MP3_resync=0;
 382     if(frames==1) goto resync;
 383   }
 384
 385   return frames;
 386 }
 387
 388 static int _has_mmx = 0;  // used by layer2.c, layer3.c to pre-scale coeffs
 389
 390 /******************************************************************************/
 391 /*           PUBLIC FUNCTIONS                  */
 392 /******************************************************************************/
 393
 394 /* It's hidden from gcc in assembler */
 395 void dct64_MMX(short *, short *, real *);
 396 void dct64_MMX_3dnow(short *, short *, real *);
 397 void dct64_MMX_3dnowex(short *, short *, real *);
 398 void dct64_sse(short *, short *, real *);
 399 void dct64_altivec(real *, real *, real *);
 400 void (*dct64_MMX_func)(short *, short *, real *);
 401
 402 #include "layer2.c"
 403 #include "layer3.c"
 404 #include "layer1.c"
 405
 406 #include "cpudetect.h"
 407
 408 // Init decoder tables.  Call first, once!
 409 #ifdef CONFIG_FAKE_MONO
 410 void MP3_Init(int fakemono){
 411 #else
 412 void MP3_Init(void){
 413 #endif
 414
 415 //gCpuCaps.hasMMX=gCpuCaps.hasMMX2=gCpuCaps.hasSSE=0; // for testing!
 416
 417     _has_mmx = 0;
 418     dct36_func = dct36;
 419
 420     make_decode_tables(outscale);
 421
 422 #if HAVE_MMX
 423     if (gCpuCaps.hasMMX)
 424     {
 425         _has_mmx = 1;
 426         synth_func = synth_1to1_MMX;
 427     }
 428 #endif
 429
 430 #if HAVE_AMD3DNOWEXT
 431     if (gCpuCaps.has3DNowExt)
 432     {
 433         dct36_func=dct36_3dnowex;
 434         dct64_MMX_func= dct64_MMX_3dnowex;
 435         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using 3DNow!Ex optimized decore!\n");
 436     }
 437     else
 438 #endif
 439 #if HAVE_AMD3DNOW
 440     if (gCpuCaps.has3DNow)
 441     {
 442         dct36_func = dct36_3dnow;
 443         dct64_MMX_func = dct64_MMX_3dnow;
 444         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using 3DNow! optimized decore!\n");
 445     }
 446     else
 447 #endif
 448 #if HAVE_SSE
 449     if (gCpuCaps.hasSSE)
 450     {
 451         dct64_MMX_func = dct64_sse;
 452         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using SSE optimized decore!\n");
 453     }
 454     else
 455 #endif
 456 #if ARCH_X86_32
 457 #if HAVE_MMX
 458     if (gCpuCaps.hasMMX)
 459     {
 460         dct64_MMX_func = dct64_MMX;
 461         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using MMX optimized decore!\n");
 462     }
 463     else
 464 #endif
 465     if (gCpuCaps.cpuType >= CPUTYPE_I586)
 466     {
 467         synth_func = synth_1to1_pent;
 468         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using Pentium optimized decore!\n");
 469     }
 470     else
 471 #endif /* ARCH_X86_32 */
 472 #if HAVE_ALTIVEC
 473     if (gCpuCaps.hasAltiVec)
 474     {
 475         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using AltiVec optimized decore!\n");
 476     }
 477     else
 478 #endif
 479     {
 480         synth_func = NULL; /* use default c version */
 481         mp_msg(MSGT_DECAUDIO,MSGL_V,"mp3lib: using generic C decore!\n");
 482     }
 483
 484 #ifdef CONFIG_FAKE_MONO
 485     if (fakemono == 1)
 486         fr.synth=synth_1to1_l;
 487     else if (fakemono == 2)
 488         fr.synth=synth_1to1_r;
 489     else
 490         fr.synth=synth_1to1;
 491 #else
 492     fr.synth=synth_1to1;
 493 #endif
 494     fr.synth_mono=synth_1to1_mono2stereo;
 495     fr.down_sample=0;
 496     fr.down_sample_sblimit = SBLIMIT>>(fr.down_sample);
 497
 498     init_layer2();
 499     init_layer3(fr.down_sample_sblimit);
 500     mp_msg(MSGT_DECAUDIO,MSGL_V,"MP3lib: init layer2&3 finished, tables done\n");
 501 }
 502
 503 #if 0
 504
 505 void MP3_Close(void){
 506   MP3_eof=1;
 507   if(mp3_file) fclose(mp3_file);
 508   mp3_file=NULL;
 509 }
 510
 511 // Open a file, init buffers. Call once per file!
 512 int MP3_Open(char *filename,int buffsize){
 513   MP3_eof=1;   // lock decoding
 514   MP3_pause=1; // lock playing
 515   if(mp3_file) MP3_Close(); // close prev. file
 516   MP3_frames=0;
 517
 518   mp3_file=fopen(filename,"rb");
 519 //  printf("MP3_Open: file='%s'",filename);
 520 //  if(!mp3_file){ printf(" not found!\n"); return 0;} else printf("Ok!\n");
 521   if(!mp3_file) return 0;
 522
 523   MP3_filesize=MP3_PrintTAG();
 524   fseek(mp3_file,0,SEEK_SET);
 525
 526   MP3_InitBuffers(buffsize);
 527   if(!tables_done_flag) MP3_Init();
 528   MP3_eof=0;  // allow decoding
 529   MP3_pause=0; // allow playing
 530   return MP3_filesize;
 531 }
 532
 533 #endif
 534
 535 // Read & decode a single frame. Called by sound driver.
 536 int MP3_DecodeFrame(unsigned char *hova,short single){
 537    pcm_sample = hova;
 538    pcm_point = 0;
 539    if(!read_frame(&fr))return(0);
 540    if(single==-2){ set_pointer(512); return(1); }
 541    if(fr.error_protection) getbits(16); /* skip crc */
 542    fr.single=single;
 543    switch(fr.lay){
 544      case 2: do_layer2(&fr,single);break;
 545      case 3: do_layer3(&fr,single);break;
 546      case 1: do_layer1(&fr,single);break;
 547      default:
 548          return 0;      // unsupported
 549    }
 550 //   ++MP3_frames;
 551    return(pcm_point?pcm_point:2);
 552 }
 553
 554 // Prints last frame header in ascii.
 555 void MP3_PrintHeader(void){
 556         static char *modes[4] = { "Stereo", "Joint-Stereo", "Dual-Channel", "Single-Channel" };
 557         static char *layers[4] = { "???" , "I", "II", "III" };
 558
 559         mp_msg(MSGT_DECAUDIO,MSGL_V,"\rMPEG %s, Layer %s, %d Hz %d kbit %s, BPF: %d\n",
 560                 fr.mpeg25 ? "2.5" : (fr.lsf ? "2.0" : "1.0"),
 561                 layers[fr.lay],freqs[fr.sampling_frequency],
 562     tabsel_123[fr.lsf][fr.lay-1][fr.bitrate_index],
 563                 modes[fr.mode],fr.framesize+4);
 564         mp_msg(MSGT_DECAUDIO,MSGL_V,"Channels: %d, copyright: %s, original: %s, CRC: %s, emphasis: %d\n",
 565                 fr.stereo,fr.copyright?"Yes":"No",
 566                 fr.original?"Yes":"No",fr.error_protection?"Yes":"No",
 567                 fr.emphasis);
 568 }
 569
 570 #if 0
 571 #include "genre.h"
 572
 573 // Read & print ID3 TAG. Do not call when playing!!!  returns filesize.
 574 int MP3_PrintTAG(void){
 575         struct id3tag {
 576                 char tag[3];
 577                 char title[30];
 578                 char artist[30];
 579                 char album[30];
 580                 char year[4];
 581                 char comment[30];
 582                 unsigned char genre;
 583         };
 584         struct id3tag tag;
 585         char title[31]={0,};
 586         char artist[31]={0,};
 587         char album[31]={0,};
 588         char year[5]={0,};
 589         char comment[31]={0,};
 590         char genre[31]={0,};
 591   int fsize;
 592   int ret;
 593
 594   fseek(mp3_file,0,SEEK_END);
 595   fsize=ftell(mp3_file);
 596   if(fseek(mp3_file,-128,SEEK_END)) return fsize;
 597   ret=fread(&tag,128,1,mp3_file);
 598   if(ret!=1 || tag.tag[0]!='T' || tag.tag[1]!='A' || tag.tag[2]!='G') return fsize;
 599
 600         strncpy(title,tag.title,30);
 601         strncpy(artist,tag.artist,30);
 602         strncpy(album,tag.album,30);
 603         strncpy(year,tag.year,4);
 604         strncpy(comment,tag.comment,30);
 605
 606         if ( tag.genre <= sizeof(genre_table)/sizeof(*genre_table) ) {
 607                 strncpy(genre, genre_table[tag.genre], 30);
 608         } else {
 609                 strncpy(genre,"Unknown",30);
 610         }
 611
 612 //      printf("\n");
 613         printf("Title  : %30s  Artist: %s\n",title,artist);
 614         printf("Album  : %30s  Year  : %4s\n",album,year);
 615         printf("Comment: %30s  Genre : %s\n",comment,genre);
 616         printf("\n");
 617   return fsize-128;
 618 }
 619
 620 #endif