Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 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 <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <math.h> |
| 25 | |
| 26 | #include "sndfile.h" |
| 27 | #include "sfendian.h" |
| 28 | #include "common.h" |
| 29 | #include "wav_w64.h" |
| 30 | #include "GSM610/gsm.h" |
| 31 | |
| 32 | #define GSM610_BLOCKSIZE 33 |
| 33 | #define GSM610_SAMPLES 160 |
| 34 | |
| 35 | typedef struct gsm610_tag |
| 36 | { int blocks ; |
| 37 | int blockcount, samplecount ; |
| 38 | int samplesperblock, blocksize ; |
| 39 | |
| 40 | int (*decode_block) (SF_PRIVATE *psf, struct gsm610_tag *pgsm610) ; |
| 41 | int (*encode_block) (SF_PRIVATE *psf, struct gsm610_tag *pgsm610) ; |
| 42 | |
| 43 | short samples [WAV_W64_GSM610_SAMPLES] ; |
| 44 | unsigned char block [WAV_W64_GSM610_BLOCKSIZE] ; |
| 45 | |
| 46 | /* Damn I hate typedef-ed pointers; yes, gsm is a pointer type. */ |
| 47 | gsm gsm_data ; |
| 48 | } GSM610_PRIVATE ; |
| 49 | |
| 50 | static sf_count_t gsm610_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; |
| 51 | static sf_count_t gsm610_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; |
| 52 | static sf_count_t gsm610_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; |
| 53 | static sf_count_t gsm610_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; |
| 54 | |
| 55 | static sf_count_t gsm610_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; |
| 56 | static sf_count_t gsm610_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; |
| 57 | static sf_count_t gsm610_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; |
| 58 | static sf_count_t gsm610_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; |
| 59 | |
| 60 | static int gsm610_read_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len) ; |
| 61 | static int gsm610_write_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, const short *ptr, int len) ; |
| 62 | |
| 63 | static int gsm610_decode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ; |
| 64 | static int gsm610_encode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ; |
| 65 | |
| 66 | static int gsm610_wav_decode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ; |
| 67 | static int gsm610_wav_encode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) ; |
| 68 | |
| 69 | static sf_count_t gsm610_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ; |
| 70 | |
| 71 | static int gsm610_close (SF_PRIVATE *psf) ; |
| 72 | |
| 73 | /*============================================================================================ |
| 74 | ** WAV GSM610 initialisation function. |
| 75 | */ |
| 76 | |
| 77 | int |
| 78 | gsm610_init (SF_PRIVATE *psf) |
| 79 | { GSM610_PRIVATE *pgsm610 ; |
| 80 | int true_flag = 1 ; |
| 81 | |
| 82 | if (psf->codec_data != NULL) |
| 83 | { psf_log_printf (psf, "*** psf->codec_data is not NULL.\n") ; |
| 84 | return SFE_INTERNAL ; |
| 85 | } ; |
| 86 | |
| 87 | if (psf->file.mode == SFM_RDWR) |
| 88 | return SFE_BAD_MODE_RW ; |
| 89 | |
| 90 | psf->sf.seekable = SF_FALSE ; |
| 91 | |
| 92 | if ((pgsm610 = calloc (1, sizeof (GSM610_PRIVATE))) == NULL) |
| 93 | return SFE_MALLOC_FAILED ; |
| 94 | |
| 95 | psf->codec_data = pgsm610 ; |
| 96 | |
| 97 | memset (pgsm610, 0, sizeof (GSM610_PRIVATE)) ; |
| 98 | |
| 99 | /*============================================================ |
| 100 | |
| 101 | Need separate gsm_data structs for encode and decode. |
| 102 | |
| 103 | ============================================================*/ |
| 104 | |
| 105 | if ((pgsm610->gsm_data = gsm_create ()) == NULL) |
| 106 | return SFE_MALLOC_FAILED ; |
| 107 | |
| 108 | switch (SF_CONTAINER (psf->sf.format)) |
| 109 | { case SF_FORMAT_WAV : |
| 110 | case SF_FORMAT_WAVEX : |
| 111 | case SF_FORMAT_W64 : |
| 112 | gsm_option (pgsm610->gsm_data, GSM_OPT_WAV49, &true_flag) ; |
| 113 | |
| 114 | pgsm610->encode_block = gsm610_wav_encode_block ; |
| 115 | pgsm610->decode_block = gsm610_wav_decode_block ; |
| 116 | |
| 117 | pgsm610->samplesperblock = WAV_W64_GSM610_SAMPLES ; |
| 118 | pgsm610->blocksize = WAV_W64_GSM610_BLOCKSIZE ; |
| 119 | break ; |
| 120 | |
| 121 | case SF_FORMAT_AIFF : |
| 122 | case SF_FORMAT_RAW : |
| 123 | pgsm610->encode_block = gsm610_encode_block ; |
| 124 | pgsm610->decode_block = gsm610_decode_block ; |
| 125 | |
| 126 | pgsm610->samplesperblock = GSM610_SAMPLES ; |
| 127 | pgsm610->blocksize = GSM610_BLOCKSIZE ; |
| 128 | break ; |
| 129 | |
| 130 | default : |
| 131 | return SFE_INTERNAL ; |
| 132 | break ; |
| 133 | } ; |
| 134 | |
| 135 | if (psf->file.mode == SFM_READ) |
| 136 | { if (psf->datalength % pgsm610->blocksize == 0) |
| 137 | pgsm610->blocks = psf->datalength / pgsm610->blocksize ; |
| 138 | else if (psf->datalength % pgsm610->blocksize == 1 && pgsm610->blocksize == GSM610_BLOCKSIZE) |
| 139 | { /* |
| 140 | ** Weird AIFF specific case. |
| 141 | ** AIFF chunks must be at an even offset from the start of file and |
| 142 | ** GSM610_BLOCKSIZE is odd which can result in an odd length SSND |
| 143 | ** chunk. The SSND chunk then gets padded on write which means that |
| 144 | ** when it is read the datalength is too big by 1. |
| 145 | */ |
| 146 | pgsm610->blocks = psf->datalength / pgsm610->blocksize ; |
| 147 | } |
| 148 | else |
| 149 | { psf_log_printf (psf, "*** Warning : data chunk seems to be truncated.\n") ; |
| 150 | pgsm610->blocks = psf->datalength / pgsm610->blocksize + 1 ; |
| 151 | } ; |
| 152 | |
| 153 | psf->sf.frames = pgsm610->samplesperblock * pgsm610->blocks ; |
| 154 | |
| 155 | psf_fseek (psf, psf->dataoffset, SEEK_SET) ; |
| 156 | |
| 157 | pgsm610->decode_block (psf, pgsm610) ; /* Read first block. */ |
| 158 | |
| 159 | psf->read_short = gsm610_read_s ; |
| 160 | psf->read_int = gsm610_read_i ; |
| 161 | psf->read_float = gsm610_read_f ; |
| 162 | psf->read_double = gsm610_read_d ; |
| 163 | } ; |
| 164 | |
| 165 | if (psf->file.mode == SFM_WRITE) |
| 166 | { pgsm610->blockcount = 0 ; |
| 167 | pgsm610->samplecount = 0 ; |
| 168 | |
| 169 | psf->write_short = gsm610_write_s ; |
| 170 | psf->write_int = gsm610_write_i ; |
| 171 | psf->write_float = gsm610_write_f ; |
| 172 | psf->write_double = gsm610_write_d ; |
| 173 | } ; |
| 174 | |
| 175 | psf->codec_close = gsm610_close ; |
| 176 | |
| 177 | psf->seek = gsm610_seek ; |
| 178 | |
| 179 | psf->filelength = psf_get_filelen (psf) ; |
| 180 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 181 | |
| 182 | return 0 ; |
| 183 | } /* gsm610_init */ |
| 184 | |
| 185 | /*============================================================================================ |
| 186 | ** GSM 6.10 Read Functions. |
| 187 | */ |
| 188 | |
| 189 | static int |
| 190 | gsm610_wav_decode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) |
| 191 | { int k ; |
| 192 | |
| 193 | pgsm610->blockcount ++ ; |
| 194 | pgsm610->samplecount = 0 ; |
| 195 | |
| 196 | if (pgsm610->blockcount > pgsm610->blocks) |
| 197 | { memset (pgsm610->samples, 0, WAV_W64_GSM610_SAMPLES * sizeof (short)) ; |
| 198 | return 1 ; |
| 199 | } ; |
| 200 | |
| 201 | if ((k = psf_fread (pgsm610->block, 1, WAV_W64_GSM610_BLOCKSIZE, psf)) != WAV_W64_GSM610_BLOCKSIZE) |
| 202 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, WAV_W64_GSM610_BLOCKSIZE) ; |
| 203 | |
| 204 | if (gsm_decode (pgsm610->gsm_data, pgsm610->block, pgsm610->samples) < 0) |
| 205 | { psf_log_printf (psf, "Error from WAV gsm_decode() on frame : %d\n", pgsm610->blockcount) ; |
| 206 | return 0 ; |
| 207 | } ; |
| 208 | |
| 209 | if (gsm_decode (pgsm610->gsm_data, pgsm610->block + (WAV_W64_GSM610_BLOCKSIZE + 1) / 2, pgsm610->samples + WAV_W64_GSM610_SAMPLES / 2) < 0) |
| 210 | { psf_log_printf (psf, "Error from WAV gsm_decode() on frame : %d.5\n", pgsm610->blockcount) ; |
| 211 | return 0 ; |
| 212 | } ; |
| 213 | |
| 214 | return 1 ; |
| 215 | } /* gsm610_wav_decode_block */ |
| 216 | |
| 217 | static int |
| 218 | gsm610_decode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) |
| 219 | { int k ; |
| 220 | |
| 221 | pgsm610->blockcount ++ ; |
| 222 | pgsm610->samplecount = 0 ; |
| 223 | |
| 224 | if (pgsm610->blockcount > pgsm610->blocks) |
| 225 | { memset (pgsm610->samples, 0, GSM610_SAMPLES * sizeof (short)) ; |
| 226 | return 1 ; |
| 227 | } ; |
| 228 | |
| 229 | if ((k = psf_fread (pgsm610->block, 1, GSM610_BLOCKSIZE, psf)) != GSM610_BLOCKSIZE) |
| 230 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, GSM610_BLOCKSIZE) ; |
| 231 | |
| 232 | if (gsm_decode (pgsm610->gsm_data, pgsm610->block, pgsm610->samples) < 0) |
| 233 | { psf_log_printf (psf, "Error from standard gsm_decode() on frame : %d\n", pgsm610->blockcount) ; |
| 234 | return 0 ; |
| 235 | } ; |
| 236 | |
| 237 | return 1 ; |
| 238 | } /* gsm610_decode_block */ |
| 239 | |
| 240 | static int |
| 241 | gsm610_read_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, short *ptr, int len) |
| 242 | { int count, total = 0, indx = 0 ; |
| 243 | |
| 244 | while (indx < len) |
| 245 | { if (pgsm610->blockcount >= pgsm610->blocks && pgsm610->samplecount >= pgsm610->samplesperblock) |
| 246 | { memset (&(ptr [indx]), 0, (len - indx) * sizeof (short)) ; |
| 247 | return total ; |
| 248 | } ; |
| 249 | |
| 250 | if (pgsm610->samplecount >= pgsm610->samplesperblock) |
| 251 | pgsm610->decode_block (psf, pgsm610) ; |
| 252 | |
| 253 | count = pgsm610->samplesperblock - pgsm610->samplecount ; |
| 254 | count = (len - indx > count) ? count : len - indx ; |
| 255 | |
| 256 | memcpy (&(ptr [indx]), &(pgsm610->samples [pgsm610->samplecount]), count * sizeof (short)) ; |
| 257 | indx += count ; |
| 258 | pgsm610->samplecount += count ; |
| 259 | total = indx ; |
| 260 | } ; |
| 261 | |
| 262 | return total ; |
| 263 | } /* gsm610_read_block */ |
| 264 | |
| 265 | static sf_count_t |
| 266 | gsm610_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) |
| 267 | { GSM610_PRIVATE *pgsm610 ; |
| 268 | int readcount, count ; |
| 269 | sf_count_t total = 0 ; |
| 270 | |
| 271 | if (psf->codec_data == NULL) |
| 272 | return 0 ; |
| 273 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 274 | |
| 275 | while (len > 0) |
| 276 | { readcount = (len > 0x10000000) ? 0x1000000 : (int) len ; |
| 277 | |
| 278 | count = gsm610_read_block (psf, pgsm610, ptr, readcount) ; |
| 279 | |
| 280 | total += count ; |
| 281 | len -= count ; |
| 282 | |
| 283 | if (count != readcount) |
| 284 | break ; |
| 285 | } ; |
| 286 | |
| 287 | return total ; |
| 288 | } /* gsm610_read_s */ |
| 289 | |
| 290 | static sf_count_t |
| 291 | gsm610_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) |
| 292 | { GSM610_PRIVATE *pgsm610 ; |
| 293 | short *sptr ; |
| 294 | int k, bufferlen, readcount = 0, count ; |
| 295 | sf_count_t total = 0 ; |
| 296 | |
| 297 | if (psf->codec_data == NULL) |
| 298 | return 0 ; |
| 299 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 300 | |
| 301 | sptr = psf->u.sbuf ; |
| 302 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 303 | while (len > 0) |
| 304 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 305 | count = gsm610_read_block (psf, pgsm610, sptr, readcount) ; |
| 306 | for (k = 0 ; k < readcount ; k++) |
| 307 | ptr [total + k] = sptr [k] << 16 ; |
| 308 | |
| 309 | total += count ; |
| 310 | len -= readcount ; |
| 311 | } ; |
| 312 | return total ; |
| 313 | } /* gsm610_read_i */ |
| 314 | |
| 315 | static sf_count_t |
| 316 | gsm610_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) |
| 317 | { GSM610_PRIVATE *pgsm610 ; |
| 318 | short *sptr ; |
| 319 | int k, bufferlen, readcount = 0, count ; |
| 320 | sf_count_t total = 0 ; |
| 321 | float normfact ; |
| 322 | |
| 323 | if (psf->codec_data == NULL) |
| 324 | return 0 ; |
| 325 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 326 | |
| 327 | normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ; |
| 328 | |
| 329 | sptr = psf->u.sbuf ; |
| 330 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 331 | while (len > 0) |
| 332 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 333 | count = gsm610_read_block (psf, pgsm610, sptr, readcount) ; |
| 334 | for (k = 0 ; k < readcount ; k++) |
| 335 | ptr [total + k] = normfact * sptr [k] ; |
| 336 | |
| 337 | total += count ; |
| 338 | len -= readcount ; |
| 339 | } ; |
| 340 | return total ; |
| 341 | } /* gsm610_read_f */ |
| 342 | |
| 343 | static sf_count_t |
| 344 | gsm610_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) |
| 345 | { GSM610_PRIVATE *pgsm610 ; |
| 346 | short *sptr ; |
| 347 | int k, bufferlen, readcount = 0, count ; |
| 348 | sf_count_t total = 0 ; |
| 349 | double normfact ; |
| 350 | |
| 351 | normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ; |
| 352 | |
| 353 | if (psf->codec_data == NULL) |
| 354 | return 0 ; |
| 355 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 356 | |
| 357 | sptr = psf->u.sbuf ; |
| 358 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 359 | while (len > 0) |
| 360 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 361 | count = gsm610_read_block (psf, pgsm610, sptr, readcount) ; |
| 362 | for (k = 0 ; k < readcount ; k++) |
| 363 | ptr [total + k] = normfact * sptr [k] ; |
| 364 | |
| 365 | total += count ; |
| 366 | len -= readcount ; |
| 367 | } ; |
| 368 | return total ; |
| 369 | } /* gsm610_read_d */ |
| 370 | |
| 371 | static sf_count_t |
| 372 | gsm610_seek (SF_PRIVATE *psf, int UNUSED (mode), sf_count_t offset) |
| 373 | { GSM610_PRIVATE *pgsm610 ; |
| 374 | int newblock, newsample ; |
| 375 | |
| 376 | if (psf->codec_data == NULL) |
| 377 | return 0 ; |
| 378 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 379 | |
| 380 | if (psf->dataoffset < 0) |
| 381 | { psf->error = SFE_BAD_SEEK ; |
| 382 | return PSF_SEEK_ERROR ; |
| 383 | } ; |
| 384 | |
| 385 | if (offset == 0) |
| 386 | { int true_flag = 1 ; |
| 387 | |
| 388 | psf_fseek (psf, psf->dataoffset, SEEK_SET) ; |
| 389 | pgsm610->blockcount = 0 ; |
| 390 | |
| 391 | gsm_init (pgsm610->gsm_data) ; |
| 392 | if ((SF_CONTAINER (psf->sf.format)) == SF_FORMAT_WAV || |
| 393 | (SF_CONTAINER (psf->sf.format)) == SF_FORMAT_W64) |
| 394 | gsm_option (pgsm610->gsm_data, GSM_OPT_WAV49, &true_flag) ; |
| 395 | |
| 396 | pgsm610->decode_block (psf, pgsm610) ; |
| 397 | pgsm610->samplecount = 0 ; |
| 398 | return 0 ; |
| 399 | } ; |
| 400 | |
| 401 | if (offset < 0 || offset > pgsm610->blocks * pgsm610->samplesperblock) |
| 402 | { psf->error = SFE_BAD_SEEK ; |
| 403 | return PSF_SEEK_ERROR ; |
| 404 | } ; |
| 405 | |
| 406 | newblock = offset / pgsm610->samplesperblock ; |
| 407 | newsample = offset % pgsm610->samplesperblock ; |
| 408 | |
| 409 | if (psf->file.mode == SFM_READ) |
| 410 | { if (psf->read_current != newblock * pgsm610->samplesperblock + newsample) |
| 411 | { psf_fseek (psf, psf->dataoffset + newblock * pgsm610->samplesperblock, SEEK_SET) ; |
| 412 | pgsm610->blockcount = newblock ; |
| 413 | pgsm610->decode_block (psf, pgsm610) ; |
| 414 | pgsm610->samplecount = newsample ; |
| 415 | } ; |
| 416 | |
| 417 | return newblock * pgsm610->samplesperblock + newsample ; |
| 418 | } ; |
| 419 | |
| 420 | /* What to do about write??? */ |
| 421 | psf->error = SFE_BAD_SEEK ; |
| 422 | return PSF_SEEK_ERROR ; |
| 423 | } /* gsm610_seek */ |
| 424 | |
| 425 | /*========================================================================================== |
| 426 | ** GSM 6.10 Write Functions. |
| 427 | */ |
| 428 | |
| 429 | static int |
| 430 | gsm610_encode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) |
| 431 | { int k ; |
| 432 | |
| 433 | /* Encode the samples. */ |
| 434 | gsm_encode (pgsm610->gsm_data, pgsm610->samples, pgsm610->block) ; |
| 435 | |
| 436 | /* Write the block to disk. */ |
| 437 | if ((k = psf_fwrite (pgsm610->block, 1, GSM610_BLOCKSIZE, psf)) != GSM610_BLOCKSIZE) |
| 438 | psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, GSM610_BLOCKSIZE) ; |
| 439 | |
| 440 | pgsm610->samplecount = 0 ; |
| 441 | pgsm610->blockcount ++ ; |
| 442 | |
| 443 | /* Set samples to zero for next block. */ |
| 444 | memset (pgsm610->samples, 0, WAV_W64_GSM610_SAMPLES * sizeof (short)) ; |
| 445 | |
| 446 | return 1 ; |
| 447 | } /* gsm610_encode_block */ |
| 448 | |
| 449 | static int |
| 450 | gsm610_wav_encode_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610) |
| 451 | { int k ; |
| 452 | |
| 453 | /* Encode the samples. */ |
| 454 | gsm_encode (pgsm610->gsm_data, pgsm610->samples, pgsm610->block) ; |
| 455 | gsm_encode (pgsm610->gsm_data, pgsm610->samples+WAV_W64_GSM610_SAMPLES/2, pgsm610->block+WAV_W64_GSM610_BLOCKSIZE/2) ; |
| 456 | |
| 457 | /* Write the block to disk. */ |
| 458 | if ((k = psf_fwrite (pgsm610->block, 1, WAV_W64_GSM610_BLOCKSIZE, psf)) != WAV_W64_GSM610_BLOCKSIZE) |
| 459 | psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, WAV_W64_GSM610_BLOCKSIZE) ; |
| 460 | |
| 461 | pgsm610->samplecount = 0 ; |
| 462 | pgsm610->blockcount ++ ; |
| 463 | |
| 464 | /* Set samples to zero for next block. */ |
| 465 | memset (pgsm610->samples, 0, WAV_W64_GSM610_SAMPLES * sizeof (short)) ; |
| 466 | |
| 467 | return 1 ; |
| 468 | } /* gsm610_wav_encode_block */ |
| 469 | |
| 470 | static int |
| 471 | gsm610_write_block (SF_PRIVATE *psf, GSM610_PRIVATE *pgsm610, const short *ptr, int len) |
| 472 | { int count, total = 0, indx = 0 ; |
| 473 | |
| 474 | while (indx < len) |
| 475 | { count = pgsm610->samplesperblock - pgsm610->samplecount ; |
| 476 | |
| 477 | if (count > len - indx) |
| 478 | count = len - indx ; |
| 479 | |
| 480 | memcpy (&(pgsm610->samples [pgsm610->samplecount]), &(ptr [indx]), count * sizeof (short)) ; |
| 481 | indx += count ; |
| 482 | pgsm610->samplecount += count ; |
| 483 | total = indx ; |
| 484 | |
| 485 | if (pgsm610->samplecount >= pgsm610->samplesperblock) |
| 486 | pgsm610->encode_block (psf, pgsm610) ; |
| 487 | } ; |
| 488 | |
| 489 | return total ; |
| 490 | } /* gsm610_write_block */ |
| 491 | |
| 492 | static sf_count_t |
| 493 | gsm610_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) |
| 494 | { GSM610_PRIVATE *pgsm610 ; |
| 495 | int writecount, count ; |
| 496 | sf_count_t total = 0 ; |
| 497 | |
| 498 | if (psf->codec_data == NULL) |
| 499 | return 0 ; |
| 500 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 501 | |
| 502 | while (len > 0) |
| 503 | { writecount = (len > 0x10000000) ? 0x10000000 : (int) len ; |
| 504 | |
| 505 | count = gsm610_write_block (psf, pgsm610, ptr, writecount) ; |
| 506 | |
| 507 | total += count ; |
| 508 | len -= count ; |
| 509 | |
| 510 | if (count != writecount) |
| 511 | break ; |
| 512 | } ; |
| 513 | |
| 514 | return total ; |
| 515 | } /* gsm610_write_s */ |
| 516 | |
| 517 | static sf_count_t |
| 518 | gsm610_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) |
| 519 | { GSM610_PRIVATE *pgsm610 ; |
| 520 | short *sptr ; |
| 521 | int k, bufferlen, writecount = 0, count ; |
| 522 | sf_count_t total = 0 ; |
| 523 | |
| 524 | if (psf->codec_data == NULL) |
| 525 | return 0 ; |
| 526 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 527 | |
| 528 | sptr = psf->u.sbuf ; |
| 529 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 530 | while (len > 0) |
| 531 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 532 | for (k = 0 ; k < writecount ; k++) |
| 533 | sptr [k] = ptr [total + k] >> 16 ; |
| 534 | count = gsm610_write_block (psf, pgsm610, sptr, writecount) ; |
| 535 | |
| 536 | total += count ; |
| 537 | len -= writecount ; |
| 538 | } ; |
| 539 | return total ; |
| 540 | } /* gsm610_write_i */ |
| 541 | |
| 542 | static sf_count_t |
| 543 | gsm610_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) |
| 544 | { GSM610_PRIVATE *pgsm610 ; |
| 545 | short *sptr ; |
| 546 | int k, bufferlen, writecount = 0, count ; |
| 547 | sf_count_t total = 0 ; |
| 548 | float normfact ; |
| 549 | |
| 550 | if (psf->codec_data == NULL) |
| 551 | return 0 ; |
| 552 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 553 | |
| 554 | normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ; |
| 555 | |
| 556 | sptr = psf->u.sbuf ; |
| 557 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 558 | while (len > 0) |
| 559 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 560 | for (k = 0 ; k < writecount ; k++) |
| 561 | sptr [k] = lrintf (normfact * ptr [total + k]) ; |
| 562 | count = gsm610_write_block (psf, pgsm610, sptr, writecount) ; |
| 563 | |
| 564 | total += count ; |
| 565 | len -= writecount ; |
| 566 | } ; |
| 567 | return total ; |
| 568 | } /* gsm610_write_f */ |
| 569 | |
| 570 | static sf_count_t |
| 571 | gsm610_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) |
| 572 | { GSM610_PRIVATE *pgsm610 ; |
| 573 | short *sptr ; |
| 574 | int k, bufferlen, writecount = 0, count ; |
| 575 | sf_count_t total = 0 ; |
| 576 | double normfact ; |
| 577 | |
| 578 | if (psf->codec_data == NULL) |
| 579 | return 0 ; |
| 580 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 581 | |
| 582 | normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ; |
| 583 | |
| 584 | sptr = psf->u.sbuf ; |
| 585 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 586 | while (len > 0) |
| 587 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 588 | for (k = 0 ; k < writecount ; k++) |
| 589 | sptr [k] = lrint (normfact * ptr [total + k]) ; |
| 590 | count = gsm610_write_block (psf, pgsm610, sptr, writecount) ; |
| 591 | |
| 592 | total += count ; |
| 593 | len -= writecount ; |
| 594 | } ; |
| 595 | return total ; |
| 596 | } /* gsm610_write_d */ |
| 597 | |
| 598 | static int |
| 599 | gsm610_close (SF_PRIVATE *psf) |
| 600 | { GSM610_PRIVATE *pgsm610 ; |
| 601 | |
| 602 | if (psf->codec_data == NULL) |
| 603 | return 0 ; |
| 604 | |
| 605 | pgsm610 = (GSM610_PRIVATE*) psf->codec_data ; |
| 606 | |
| 607 | if (psf->file.mode == SFM_WRITE) |
| 608 | { /* If a block has been partially assembled, write it out |
| 609 | ** as the final block. |
| 610 | */ |
| 611 | |
| 612 | if (pgsm610->samplecount && pgsm610->samplecount < pgsm610->samplesperblock) |
| 613 | pgsm610->encode_block (psf, pgsm610) ; |
| 614 | } ; |
| 615 | |
| 616 | if (pgsm610->gsm_data) |
| 617 | gsm_destroy (pgsm610->gsm_data) ; |
| 618 | |
| 619 | return 0 ; |
| 620 | } /* gsm610_close */ |
| 621 | |