interpretor/lib/src/libsndfile-1.0.25/src/svx.c

   1 /*
   2 ** Copyright (C) 1999-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   3 **
   4 ** This program is free software; you can redistribute it and/or modify
   5 ** it under the terms of the GNU Lesser General Public License as published by
   6 ** the Free Software Foundation; either version 2.1 of the License, or
   7 ** (at your option) any later version.
   8 **
   9 ** This program is distributed in the hope that it will be useful,
  10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 ** GNU Lesser General Public License for more details.
  13 **
  14 ** You should have received a copy of the GNU Lesser General Public License
  15 ** along with this program; if not, write to the Free Software
  16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18
  19 #include "sfconfig.h"
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <ctype.h>
  24 #include <stdarg.h>
  25
  26 #include "sndfile.h"
  27 #include "sfendian.h"
  28 #include "common.h"
  29
  30
  31 /*------------------------------------------------------------------------------
  32  * Macros to handle big/little endian issues.
  33 */
  34
  35 #define FORM_MARKER     (MAKE_MARKER ('F', 'O', 'R', 'M'))
  36 #define SVX8_MARKER     (MAKE_MARKER ('8', 'S', 'V', 'X'))
  37 #define SV16_MARKER     (MAKE_MARKER ('1', '6', 'S', 'V'))
  38 #define VHDR_MARKER     (MAKE_MARKER ('V', 'H', 'D', 'R'))
  39 #define BODY_MARKER     (MAKE_MARKER ('B', 'O', 'D', 'Y'))
  40
  41 #define ATAK_MARKER     (MAKE_MARKER ('A', 'T', 'A', 'K'))
  42 #define RLSE_MARKER     (MAKE_MARKER ('R', 'L', 'S', 'E'))
  43
  44 #define c_MARKER        (MAKE_MARKER ('(', 'c', ')', ' '))
  45 #define NAME_MARKER     (MAKE_MARKER ('N', 'A', 'M', 'E'))
  46 #define AUTH_MARKER     (MAKE_MARKER ('A', 'U', 'T', 'H'))
  47 #define ANNO_MARKER     (MAKE_MARKER ('A', 'N', 'N', 'O'))
  48 #define CHAN_MARKER     (MAKE_MARKER ('C', 'H', 'A', 'N'))
  49
  50 /*------------------------------------------------------------------------------
  51  * Typedefs for file chunks.
  52 */
  53
  54 typedef struct
  55 {       unsigned int    oneShotHiSamples, repeatHiSamples, samplesPerHiCycle ;
  56         unsigned short  samplesPerSec ;
  57         unsigned char   octave, compression ;
  58         unsigned int    volume ;
  59 } VHDR_CHUNK ;
  60
  61 enum {
  62         HAVE_FORM       = 0x01,
  63
  64         HAVE_SVX        = 0x02,
  65         HAVE_VHDR       = 0x04,
  66         HAVE_BODY       = 0x08
  67 } ;
  68
  69 /*------------------------------------------------------------------------------
  70  * Private static functions.
  71 */
  72
  73 static int      svx_close       (SF_PRIVATE *psf) ;
  74 static int      svx_write_header (SF_PRIVATE *psf, int calc_length) ;
  75 static int      svx_read_header (SF_PRIVATE *psf) ;
  76
  77 /*------------------------------------------------------------------------------
  78 ** Public function.
  79 */
  80
  81 int
  82 svx_open        (SF_PRIVATE *psf)
  83 {       int error ;
  84
  85         if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
  86         {       if ((error = svx_read_header (psf)))
  87                         return error ;
  88
  89                 psf->endian = SF_ENDIAN_BIG ;                   /* All SVX files are big endian. */
  90
  91                 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
  92                 if (psf->blockwidth)
  93                         psf->sf.frames = psf->datalength / psf->blockwidth ;
  94
  95                 psf_fseek (psf, psf->dataoffset, SEEK_SET) ;
  96                 } ;
  97
  98         if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
  99         {       if (psf->is_pipe)
 100                         return SFE_NO_PIPE_WRITE ;
 101
 102                 if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_SVX)
 103                         return  SFE_BAD_OPEN_FORMAT ;
 104
 105                 psf->endian = SF_ENDIAN (psf->sf.format) ;
 106
 107                 if (psf->endian == SF_ENDIAN_LITTLE || (CPU_IS_LITTLE_ENDIAN && psf->endian == SF_ENDIAN_CPU))
 108                         return SFE_BAD_ENDIAN ;
 109
 110                 psf->endian = SF_ENDIAN_BIG ;                   /* All SVX files are big endian. */
 111
 112                 error = svx_write_header (psf, SF_FALSE) ;
 113                 if (error)
 114                         return error ;
 115
 116                 psf->write_header = svx_write_header ;
 117                 } ;
 118
 119         psf->container_close = svx_close ;
 120
 121         if ((error = pcm_init (psf)))
 122                 return error ;
 123
 124         return 0 ;
 125 } /* svx_open */
 126
 127 /*------------------------------------------------------------------------------
 128 */
 129
 130 static int
 131 svx_read_header (SF_PRIVATE *psf)
 132 {       VHDR_CHUNK              vhdr ;
 133         unsigned int    FORMsize, vhdrsize, dword, marker ;
 134         int                             filetype = 0, parsestage = 0, done = 0 ;
 135         int                     bytecount = 0, channels ;
 136
 137         if (psf->filelength > SF_PLATFORM_S64 (0xffffffff))
 138                 psf_log_printf (psf, "Warning : filelength > 0xffffffff. This is bad!!!!\n") ;
 139
 140         memset (&vhdr, 0, sizeof (vhdr)) ;
 141         psf_binheader_readf (psf, "p", 0) ;
 142
 143         /* Set default number of channels. Modify later if necessary */
 144         psf->sf.channels = 1 ;
 145
 146         psf->sf.format = SF_FORMAT_SVX ;
 147
 148         while (! done)
 149         {       psf_binheader_readf (psf, "m", &marker) ;
 150                 switch (marker)
 151                 {       case FORM_MARKER :
 152                                         if (parsestage)
 153                                                 return SFE_SVX_NO_FORM ;
 154
 155                                         psf_binheader_readf (psf, "E4", &FORMsize) ;
 156
 157                                         if (FORMsize != psf->filelength - 2 * sizeof (dword))
 158                                         {       dword = psf->filelength - 2 * sizeof (dword) ;
 159                                                 psf_log_printf (psf, "FORM : %d (should be %d)\n", FORMsize, dword) ;
 160                                                 FORMsize = dword ;
 161                                                 }
 162                                         else
 163                                                 psf_log_printf (psf, "FORM : %d\n", FORMsize) ;
 164                                         parsestage |= HAVE_FORM ;
 165                                         break ;
 166
 167                         case SVX8_MARKER :
 168                         case SV16_MARKER :
 169                                         if (! (parsestage & HAVE_FORM))
 170                                                 return SFE_SVX_NO_FORM ;
 171                                         filetype = marker ;
 172                                         psf_log_printf (psf, " %M\n", marker) ;
 173                                         parsestage |= HAVE_SVX ;
 174                                         break ;
 175
 176                         case VHDR_MARKER :
 177                                         if (! (parsestage & (HAVE_FORM | HAVE_SVX)))
 178                                                 return SFE_SVX_NO_FORM ;
 179
 180                                         psf_binheader_readf (psf, "E4", &vhdrsize) ;
 181
 182                                         psf_log_printf (psf, " VHDR : %d\n", vhdrsize) ;
 183
 184                                         psf_binheader_readf (psf, "E4442114", &(vhdr.oneShotHiSamples), &(vhdr.repeatHiSamples),
 185                                                 &(vhdr.samplesPerHiCycle), &(vhdr.samplesPerSec), &(vhdr.octave), &(vhdr.compression),
 186                                                 &(vhdr.volume)) ;
 187
 188                                         psf_log_printf (psf, "  OneShotHiSamples  : %d\n", vhdr.oneShotHiSamples) ;
 189                                         psf_log_printf (psf, "  RepeatHiSamples   : %d\n", vhdr.repeatHiSamples) ;
 190                                         psf_log_printf (psf, "  samplesPerHiCycle : %d\n", vhdr.samplesPerHiCycle) ;
 191                                         psf_log_printf (psf, "  Sample Rate       : %d\n", vhdr.samplesPerSec) ;
 192                                         psf_log_printf (psf, "  Octave            : %d\n", vhdr.octave) ;
 193
 194                                         psf_log_printf (psf, "  Compression       : %d => ", vhdr.compression) ;
 195
 196                                         switch (vhdr.compression)
 197                                         {       case 0 : psf_log_printf (psf, "None.\n") ;
 198                                                                 break ;
 199                                                 case 1 : psf_log_printf (psf, "Fibonacci delta\n") ;
 200                                                                 break ;
 201                                                 case 2 : psf_log_printf (psf, "Exponential delta\n") ;
 202                                                                 break ;
 203                                                 } ;
 204
 205                                         psf_log_printf (psf, "  Volume            : %d\n", vhdr.volume) ;
 206
 207                                         psf->sf.samplerate      = vhdr.samplesPerSec ;
 208
 209                                         if (filetype == SVX8_MARKER)
 210                                         {       psf->sf.format |= SF_FORMAT_PCM_S8 ;
 211                                                 psf->bytewidth = 1 ;
 212                                                 }
 213                                         else if (filetype == SV16_MARKER)
 214                                         {       psf->sf.format |= SF_FORMAT_PCM_16 ;
 215                                                 psf->bytewidth = 2 ;
 216                                                 } ;
 217
 218                                         parsestage |= HAVE_VHDR ;
 219                                         break ;
 220
 221                         case BODY_MARKER :
 222                                         if (! (parsestage & HAVE_VHDR))
 223                                                 return SFE_SVX_NO_BODY ;
 224
 225                                         psf_binheader_readf (psf, "E4", &dword) ;
 226                                         psf->datalength = dword ;
 227
 228                                         psf->dataoffset = psf_ftell (psf) ;
 229                                         if (psf->dataoffset < 0)
 230                                                 return SFE_SVX_NO_BODY ;
 231
 232                                         if (psf->datalength > psf->filelength - psf->dataoffset)
 233                                         {       psf_log_printf (psf, " BODY : %D (should be %D)\n", psf->datalength, psf->filelength - psf->dataoffset) ;
 234                                                 psf->datalength = psf->filelength - psf->dataoffset ;
 235                                                 }
 236                                         else
 237                                                 psf_log_printf (psf, " BODY : %D\n", psf->datalength) ;
 238
 239                                         parsestage |= HAVE_BODY ;
 240
 241                                         if (! psf->sf.seekable)
 242                                                 break ;
 243
 244                                         psf_fseek (psf, psf->datalength, SEEK_CUR) ;
 245                                         break ;
 246
 247                         case NAME_MARKER :
 248                                         if (! (parsestage & HAVE_SVX))
 249                                                 return SFE_SVX_NO_FORM ;
 250
 251                                         psf_binheader_readf (psf, "E4", &dword) ;
 252
 253                                         psf_log_printf (psf, " %M : %d\n", marker, dword) ;
 254
 255                                         if (strlen (psf->file.name.c) != dword)
 256                                         {       if (dword > sizeof (psf->file.name.c) - 1)
 257                                                         return SFE_SVX_BAD_NAME_LENGTH ;
 258
 259                                                 psf_binheader_readf (psf, "b", psf->file.name.c, dword) ;
 260                                                 psf->file.name.c [dword] = 0 ;
 261                                                 }
 262                                         else
 263                                                 psf_binheader_readf (psf, "j", dword) ;
 264                                         break ;
 265
 266                         case ANNO_MARKER :
 267                                         if (! (parsestage & HAVE_SVX))
 268                                                 return SFE_SVX_NO_FORM ;
 269
 270                                         psf_binheader_readf (psf, "E4", &dword) ;
 271
 272                                         psf_log_printf (psf, " %M : %d\n", marker, dword) ;
 273
 274                                         psf_binheader_readf (psf, "j", dword) ;
 275                                         break ;
 276
 277                         case CHAN_MARKER :
 278                                         if (! (parsestage & HAVE_SVX))
 279                                                 return SFE_SVX_NO_FORM ;
 280
 281                                         psf_binheader_readf (psf, "E4", &dword) ;
 282
 283                                         psf_log_printf (psf, " %M : %d\n", marker, dword) ;
 284
 285                                         bytecount += psf_binheader_readf (psf, "E4", &channels) ;
 286
 287                                         if (channels == 2 || channels == 4)
 288                                                 psf_log_printf (psf, "  Channels : %d => mono\n", channels) ;
 289                                         else if (channels == 6)
 290                                         {       psf->sf.channels = 2 ;
 291                                                 psf_log_printf (psf, "  Channels : %d => stereo\n", channels) ;
 292                                                 }
 293                                         else
 294                                                 psf_log_printf (psf, "  Channels : %d *** assuming mono\n", channels) ;
 295
 296                                         psf_binheader_readf (psf, "j", dword - bytecount) ;
 297                                         break ;
 298
 299
 300                         case AUTH_MARKER :
 301                         case c_MARKER :
 302                                         if (! (parsestage & HAVE_SVX))
 303                                                 return SFE_SVX_NO_FORM ;
 304
 305                                         psf_binheader_readf (psf, "E4", &dword) ;
 306
 307                                         psf_log_printf (psf, " %M : %d\n", marker, dword) ;
 308
 309                                         psf_binheader_readf (psf, "j", dword) ;
 310                                         break ;
 311
 312                         default :
 313                                         if (psf_isprint ((marker >> 24) & 0xFF) && psf_isprint ((marker >> 16) & 0xFF)
 314                                                 && psf_isprint ((marker >> 8) & 0xFF) && psf_isprint (marker & 0xFF))
 315                                         {       psf_binheader_readf (psf, "E4", &dword) ;
 316
 317                                                 psf_log_printf (psf, "%M : %d (unknown marker)\n", marker, dword) ;
 318
 319                                                 psf_binheader_readf (psf, "j", dword) ;
 320                                                 break ;
 321                                                 } ;
 322                                         if ((dword = psf_ftell (psf)) & 0x03)
 323                                         {       psf_log_printf (psf, "  Unknown chunk marker at position %d. Resynching.\n", dword - 4) ;
 324
 325                                                 psf_binheader_readf (psf, "j", -3) ;
 326                                                 break ;
 327                                                 } ;
 328                                         psf_log_printf (psf, "*** Unknown chunk marker : %X. Exiting parser.\n", marker) ;
 329                                         done = 1 ;
 330                         } ;     /* switch (marker) */
 331
 332                 if (! psf->sf.seekable && (parsestage & HAVE_BODY))
 333                         break ;
 334
 335                 if (psf_ftell (psf) >= psf->filelength - SIGNED_SIZEOF (dword))
 336                         break ;
 337                 } ; /* while (1) */
 338
 339         if (vhdr.compression)
 340                 return SFE_SVX_BAD_COMP ;
 341
 342         if (psf->dataoffset <= 0)
 343                 return SFE_SVX_NO_DATA ;
 344
 345         return 0 ;
 346 } /* svx_read_header */
 347
 348 static int
 349 svx_close (SF_PRIVATE *psf)
 350 {
 351         if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
 352                 svx_write_header (psf, SF_TRUE) ;
 353
 354         return 0 ;
 355 } /* svx_close */
 356
 357 static int
 358 svx_write_header (SF_PRIVATE *psf, int calc_length)
 359 {       static  char    annotation      [] = "libsndfile by Erik de Castro Lopo\0\0\0" ;
 360         sf_count_t      current ;
 361
 362         current = psf_ftell (psf) ;
 363
 364         if (calc_length)
 365         {       psf->filelength = psf_get_filelen (psf) ;
 366
 367                 psf->datalength = psf->filelength - psf->dataoffset ;
 368
 369                 if (psf->dataend)
 370                         psf->datalength -= psf->filelength - psf->dataend ;
 371
 372                 psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
 373                 } ;
 374
 375         psf->header [0] = 0 ;
 376         psf->headindex = 0 ;
 377         psf_fseek (psf, 0, SEEK_SET) ;
 378
 379         /* FORM marker and FORM size. */
 380         psf_binheader_writef (psf, "Etm8", FORM_MARKER, (psf->filelength < 8) ?
 381                         psf->filelength * 0 : psf->filelength - 8) ;
 382
 383         psf_binheader_writef (psf, "m", (psf->bytewidth == 1) ? SVX8_MARKER : SV16_MARKER) ;
 384
 385         /* VHDR chunk. */
 386         psf_binheader_writef (psf, "Em4", VHDR_MARKER, sizeof (VHDR_CHUNK)) ;
 387         /* VHDR : oneShotHiSamples, repeatHiSamples, samplesPerHiCycle */
 388         psf_binheader_writef (psf, "E444", psf->sf.frames, 0, 0) ;
 389         /* VHDR : samplesPerSec, octave, compression */
 390         psf_binheader_writef (psf, "E211", psf->sf.samplerate, 1, 0) ;
 391         /* VHDR : volume */
 392         psf_binheader_writef (psf, "E4", (psf->bytewidth == 1) ? 0xFF : 0xFFFF) ;
 393
 394         if (psf->sf.channels == 2)
 395                 psf_binheader_writef (psf, "Em44", CHAN_MARKER, 4, 6) ;
 396
 397         /* Filename and annotation strings. */
 398         psf_binheader_writef (psf, "Emsms", NAME_MARKER, psf->file.name.c, ANNO_MARKER, annotation) ;
 399
 400         /* BODY marker and size. */
 401         psf_binheader_writef (psf, "Etm8", BODY_MARKER, (psf->datalength < 0) ?
 402                         psf->datalength * 0 : psf->datalength) ;
 403
 404         psf_fwrite (psf->header, psf->headindex, 1, psf) ;
 405
 406         if (psf->error)
 407                 return psf->error ;
 408
 409         psf->dataoffset = psf->headindex ;
 410
 411         if (current > 0)
 412                 psf_fseek (psf, current, SEEK_SET) ;
 413
 414         return psf->error ;
 415 } /* svx_write_header */
 416