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 "G72x/g72x.h" |
| 30 | |
| 31 | /* This struct is private to the G72x code. */ |
| 32 | struct g72x_state ; |
| 33 | typedef struct g72x_state G72x_STATE ; |
| 34 | |
| 35 | typedef struct |
| 36 | { /* Private data. Don't mess with it. */ |
| 37 | struct g72x_state * private ; |
| 38 | |
| 39 | /* Public data. Read only. */ |
| 40 | int blocksize, samplesperblock, bytesperblock ; |
| 41 | |
| 42 | /* Public data. Read and write. */ |
| 43 | int blocks_total, block_curr, sample_curr ; |
| 44 | unsigned char block [G72x_BLOCK_SIZE] ; |
| 45 | short samples [G72x_BLOCK_SIZE] ; |
| 46 | } G72x_PRIVATE ; |
| 47 | |
| 48 | static int psf_g72x_decode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) ; |
| 49 | static int psf_g72x_encode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) ; |
| 50 | |
| 51 | static sf_count_t g72x_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; |
| 52 | static sf_count_t g72x_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; |
| 53 | static sf_count_t g72x_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; |
| 54 | static sf_count_t g72x_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; |
| 55 | |
| 56 | static sf_count_t g72x_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; |
| 57 | static sf_count_t g72x_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; |
| 58 | static sf_count_t g72x_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; |
| 59 | static sf_count_t g72x_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; |
| 60 | |
| 61 | static sf_count_t g72x_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ; |
| 62 | |
| 63 | static int g72x_close (SF_PRIVATE *psf) ; |
| 64 | |
| 65 | |
| 66 | /*============================================================================================ |
| 67 | ** WAV G721 Reader initialisation function. |
| 68 | */ |
| 69 | |
| 70 | int |
| 71 | g72x_init (SF_PRIVATE * psf) |
| 72 | { G72x_PRIVATE *pg72x ; |
| 73 | int bitspersample, bytesperblock, codec ; |
| 74 | |
| 75 | if (psf->codec_data != NULL) |
| 76 | { psf_log_printf (psf, "*** psf->codec_data is not NULL.\n") ; |
| 77 | return SFE_INTERNAL ; |
| 78 | } ; |
| 79 | |
| 80 | psf->sf.seekable = SF_FALSE ; |
| 81 | |
| 82 | if (psf->sf.channels != 1) |
| 83 | return SFE_G72X_NOT_MONO ; |
| 84 | |
| 85 | if ((pg72x = calloc (1, sizeof (G72x_PRIVATE))) == NULL) |
| 86 | return SFE_MALLOC_FAILED ; |
| 87 | |
| 88 | psf->codec_data = (void*) pg72x ; |
| 89 | |
| 90 | pg72x->block_curr = 0 ; |
| 91 | pg72x->sample_curr = 0 ; |
| 92 | |
| 93 | switch (SF_CODEC (psf->sf.format)) |
| 94 | { case SF_FORMAT_G721_32 : |
| 95 | codec = G721_32_BITS_PER_SAMPLE ; |
| 96 | bytesperblock = G721_32_BYTES_PER_BLOCK ; |
| 97 | bitspersample = G721_32_BITS_PER_SAMPLE ; |
| 98 | break ; |
| 99 | |
| 100 | case SF_FORMAT_G723_24: |
| 101 | codec = G723_24_BITS_PER_SAMPLE ; |
| 102 | bytesperblock = G723_24_BYTES_PER_BLOCK ; |
| 103 | bitspersample = G723_24_BITS_PER_SAMPLE ; |
| 104 | break ; |
| 105 | |
| 106 | case SF_FORMAT_G723_40: |
| 107 | codec = G723_40_BITS_PER_SAMPLE ; |
| 108 | bytesperblock = G723_40_BYTES_PER_BLOCK ; |
| 109 | bitspersample = G723_40_BITS_PER_SAMPLE ; |
| 110 | break ; |
| 111 | |
| 112 | default : return SFE_UNIMPLEMENTED ; |
| 113 | } ; |
| 114 | |
| 115 | psf->blockwidth = psf->bytewidth = 1 ; |
| 116 | |
| 117 | psf->filelength = psf_get_filelen (psf) ; |
| 118 | if (psf->filelength < psf->dataoffset) |
| 119 | psf->filelength = psf->dataoffset ; |
| 120 | |
| 121 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 122 | if (psf->dataend > 0) |
| 123 | psf->datalength -= psf->filelength - psf->dataend ; |
| 124 | |
| 125 | if (psf->file.mode == SFM_READ) |
| 126 | { pg72x->private = g72x_reader_init (codec, &(pg72x->blocksize), &(pg72x->samplesperblock)) ; |
| 127 | if (pg72x->private == NULL) |
| 128 | return SFE_MALLOC_FAILED ; |
| 129 | |
| 130 | pg72x->bytesperblock = bytesperblock ; |
| 131 | |
| 132 | psf->read_short = g72x_read_s ; |
| 133 | psf->read_int = g72x_read_i ; |
| 134 | psf->read_float = g72x_read_f ; |
| 135 | psf->read_double = g72x_read_d ; |
| 136 | |
| 137 | psf->seek = g72x_seek ; |
| 138 | |
| 139 | if (psf->datalength % pg72x->blocksize) |
| 140 | { psf_log_printf (psf, "*** Odd psf->datalength (%D) should be a multiple of %d\n", psf->datalength, pg72x->blocksize) ; |
| 141 | pg72x->blocks_total = (psf->datalength / pg72x->blocksize) + 1 ; |
| 142 | } |
| 143 | else |
| 144 | pg72x->blocks_total = psf->datalength / pg72x->blocksize ; |
| 145 | |
| 146 | psf->sf.frames = pg72x->blocks_total * pg72x->samplesperblock ; |
| 147 | |
| 148 | psf_g72x_decode_block (psf, pg72x) ; |
| 149 | } |
| 150 | else if (psf->file.mode == SFM_WRITE) |
| 151 | { pg72x->private = g72x_writer_init (codec, &(pg72x->blocksize), &(pg72x->samplesperblock)) ; |
| 152 | if (pg72x->private == NULL) |
| 153 | return SFE_MALLOC_FAILED ; |
| 154 | |
| 155 | pg72x->bytesperblock = bytesperblock ; |
| 156 | |
| 157 | psf->write_short = g72x_write_s ; |
| 158 | psf->write_int = g72x_write_i ; |
| 159 | psf->write_float = g72x_write_f ; |
| 160 | psf->write_double = g72x_write_d ; |
| 161 | |
| 162 | if (psf->datalength % pg72x->blocksize) |
| 163 | pg72x->blocks_total = (psf->datalength / pg72x->blocksize) + 1 ; |
| 164 | else |
| 165 | pg72x->blocks_total = psf->datalength / pg72x->blocksize ; |
| 166 | |
| 167 | if (psf->datalength > 0) |
| 168 | psf->sf.frames = (8 * psf->datalength) / bitspersample ; |
| 169 | |
| 170 | if ((psf->sf.frames * bitspersample) / 8 != psf->datalength) |
| 171 | psf_log_printf (psf, "*** Warning : weird psf->datalength.\n") ; |
| 172 | } ; |
| 173 | |
| 174 | psf->codec_close = g72x_close ; |
| 175 | |
| 176 | return 0 ; |
| 177 | } /* g72x_init */ |
| 178 | |
| 179 | /*============================================================================================ |
| 180 | ** G721 Read Functions. |
| 181 | */ |
| 182 | |
| 183 | static int |
| 184 | psf_g72x_decode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) |
| 185 | { int k ; |
| 186 | |
| 187 | pg72x->block_curr ++ ; |
| 188 | pg72x->sample_curr = 0 ; |
| 189 | |
| 190 | if (pg72x->block_curr > pg72x->blocks_total) |
| 191 | { memset (pg72x->samples, 0, G72x_BLOCK_SIZE * sizeof (short)) ; |
| 192 | return 1 ; |
| 193 | } ; |
| 194 | |
| 195 | if ((k = psf_fread (pg72x->block, 1, pg72x->bytesperblock, psf)) != pg72x->bytesperblock) |
| 196 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, pg72x->bytesperblock) ; |
| 197 | |
| 198 | pg72x->blocksize = k ; |
| 199 | g72x_decode_block (pg72x->private, pg72x->block, pg72x->samples) ; |
| 200 | |
| 201 | return 1 ; |
| 202 | } /* psf_g72x_decode_block */ |
| 203 | |
| 204 | static int |
| 205 | g72x_read_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x, short *ptr, int len) |
| 206 | { int count, total = 0, indx = 0 ; |
| 207 | |
| 208 | while (indx < len) |
| 209 | { if (pg72x->block_curr > pg72x->blocks_total) |
| 210 | { memset (&(ptr [indx]), 0, (len - indx) * sizeof (short)) ; |
| 211 | return total ; |
| 212 | } ; |
| 213 | |
| 214 | if (pg72x->sample_curr >= pg72x->samplesperblock) |
| 215 | psf_g72x_decode_block (psf, pg72x) ; |
| 216 | |
| 217 | count = pg72x->samplesperblock - pg72x->sample_curr ; |
| 218 | count = (len - indx > count) ? count : len - indx ; |
| 219 | |
| 220 | memcpy (&(ptr [indx]), &(pg72x->samples [pg72x->sample_curr]), count * sizeof (short)) ; |
| 221 | indx += count ; |
| 222 | pg72x->sample_curr += count ; |
| 223 | total = indx ; |
| 224 | } ; |
| 225 | |
| 226 | return total ; |
| 227 | } /* g72x_read_block */ |
| 228 | |
| 229 | static sf_count_t |
| 230 | g72x_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) |
| 231 | { G72x_PRIVATE *pg72x ; |
| 232 | int readcount, count ; |
| 233 | sf_count_t total = 0 ; |
| 234 | |
| 235 | if (psf->codec_data == NULL) |
| 236 | return 0 ; |
| 237 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 238 | |
| 239 | while (len > 0) |
| 240 | { readcount = (len > 0x10000000) ? 0x10000000 : (int) len ; |
| 241 | |
| 242 | count = g72x_read_block (psf, pg72x, ptr, readcount) ; |
| 243 | |
| 244 | total += count ; |
| 245 | len -= count ; |
| 246 | |
| 247 | if (count != readcount) |
| 248 | break ; |
| 249 | } ; |
| 250 | |
| 251 | return total ; |
| 252 | } /* g72x_read_s */ |
| 253 | |
| 254 | static sf_count_t |
| 255 | g72x_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) |
| 256 | { G72x_PRIVATE *pg72x ; |
| 257 | short *sptr ; |
| 258 | int k, bufferlen, readcount = 0, count ; |
| 259 | sf_count_t total = 0 ; |
| 260 | |
| 261 | if (psf->codec_data == NULL) |
| 262 | return 0 ; |
| 263 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 264 | |
| 265 | sptr = psf->u.sbuf ; |
| 266 | bufferlen = SF_BUFFER_LEN / sizeof (short) ; |
| 267 | while (len > 0) |
| 268 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 269 | count = g72x_read_block (psf, pg72x, sptr, readcount) ; |
| 270 | |
| 271 | for (k = 0 ; k < readcount ; k++) |
| 272 | ptr [total + k] = sptr [k] << 16 ; |
| 273 | |
| 274 | total += count ; |
| 275 | len -= readcount ; |
| 276 | if (count != readcount) |
| 277 | break ; |
| 278 | } ; |
| 279 | |
| 280 | return total ; |
| 281 | } /* g72x_read_i */ |
| 282 | |
| 283 | static sf_count_t |
| 284 | g72x_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) |
| 285 | { G72x_PRIVATE *pg72x ; |
| 286 | short *sptr ; |
| 287 | int k, bufferlen, readcount = 0, count ; |
| 288 | sf_count_t total = 0 ; |
| 289 | float normfact ; |
| 290 | |
| 291 | if (psf->codec_data == NULL) |
| 292 | return 0 ; |
| 293 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 294 | |
| 295 | normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ; |
| 296 | |
| 297 | sptr = psf->u.sbuf ; |
| 298 | bufferlen = SF_BUFFER_LEN / sizeof (short) ; |
| 299 | while (len > 0) |
| 300 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 301 | count = g72x_read_block (psf, pg72x, sptr, readcount) ; |
| 302 | for (k = 0 ; k < readcount ; k++) |
| 303 | ptr [total + k] = normfact * sptr [k] ; |
| 304 | |
| 305 | total += count ; |
| 306 | len -= readcount ; |
| 307 | if (count != readcount) |
| 308 | break ; |
| 309 | } ; |
| 310 | |
| 311 | return total ; |
| 312 | } /* g72x_read_f */ |
| 313 | |
| 314 | static sf_count_t |
| 315 | g72x_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) |
| 316 | { G72x_PRIVATE *pg72x ; |
| 317 | short *sptr ; |
| 318 | int k, bufferlen, readcount = 0, count ; |
| 319 | sf_count_t total = 0 ; |
| 320 | double normfact ; |
| 321 | |
| 322 | if (psf->codec_data == NULL) |
| 323 | return 0 ; |
| 324 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 325 | |
| 326 | normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ; |
| 327 | |
| 328 | sptr = psf->u.sbuf ; |
| 329 | bufferlen = SF_BUFFER_LEN / sizeof (short) ; |
| 330 | while (len > 0) |
| 331 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 332 | count = g72x_read_block (psf, pg72x, sptr, readcount) ; |
| 333 | for (k = 0 ; k < readcount ; k++) |
| 334 | ptr [total + k] = normfact * (double) (sptr [k]) ; |
| 335 | |
| 336 | total += count ; |
| 337 | len -= readcount ; |
| 338 | if (count != readcount) |
| 339 | break ; |
| 340 | } ; |
| 341 | |
| 342 | return total ; |
| 343 | } /* g72x_read_d */ |
| 344 | |
| 345 | static sf_count_t |
| 346 | g72x_seek (SF_PRIVATE *psf, int UNUSED (mode), sf_count_t UNUSED (offset)) |
| 347 | { |
| 348 | psf_log_printf (psf, "seek unsupported\n") ; |
| 349 | |
| 350 | /* No simple solution. To do properly, would need to seek |
| 351 | ** to start of file and decode everything up to seek position. |
| 352 | ** Maybe implement SEEK_SET to 0 only? |
| 353 | */ |
| 354 | return 0 ; |
| 355 | |
| 356 | /* |
| 357 | ** G72x_PRIVATE *pg72x ; |
| 358 | ** int newblock, newsample, sample_curr ; |
| 359 | ** |
| 360 | ** if (psf->codec_data == NULL) |
| 361 | ** return 0 ; |
| 362 | ** pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 363 | ** |
| 364 | ** if (! (psf->datalength && psf->dataoffset)) |
| 365 | ** { psf->error = SFE_BAD_SEEK ; |
| 366 | ** return PSF_SEEK_ERROR ; |
| 367 | ** } ; |
| 368 | ** |
| 369 | ** sample_curr = (8 * psf->datalength) / G721_32_BITS_PER_SAMPLE ; |
| 370 | ** |
| 371 | ** switch (whence) |
| 372 | ** { case SEEK_SET : |
| 373 | ** if (offset < 0 || offset > sample_curr) |
| 374 | ** { psf->error = SFE_BAD_SEEK ; |
| 375 | ** return PSF_SEEK_ERROR ; |
| 376 | ** } ; |
| 377 | ** newblock = offset / pg72x->samplesperblock ; |
| 378 | ** newsample = offset % pg72x->samplesperblock ; |
| 379 | ** break ; |
| 380 | ** |
| 381 | ** case SEEK_CUR : |
| 382 | ** if (psf->current + offset < 0 || psf->current + offset > sample_curr) |
| 383 | ** { psf->error = SFE_BAD_SEEK ; |
| 384 | ** return PSF_SEEK_ERROR ; |
| 385 | ** } ; |
| 386 | ** newblock = (8 * (psf->current + offset)) / pg72x->samplesperblock ; |
| 387 | ** newsample = (8 * (psf->current + offset)) % pg72x->samplesperblock ; |
| 388 | ** break ; |
| 389 | ** |
| 390 | ** case SEEK_END : |
| 391 | ** if (offset > 0 || sample_curr + offset < 0) |
| 392 | ** { psf->error = SFE_BAD_SEEK ; |
| 393 | ** return PSF_SEEK_ERROR ; |
| 394 | ** } ; |
| 395 | ** newblock = (sample_curr + offset) / pg72x->samplesperblock ; |
| 396 | ** newsample = (sample_curr + offset) % pg72x->samplesperblock ; |
| 397 | ** break ; |
| 398 | ** |
| 399 | ** default : |
| 400 | ** psf->error = SFE_BAD_SEEK ; |
| 401 | ** return PSF_SEEK_ERROR ; |
| 402 | ** } ; |
| 403 | ** |
| 404 | ** if (psf->file.mode == SFM_READ) |
| 405 | ** { psf_fseek (psf, psf->dataoffset + newblock * pg72x->blocksize, SEEK_SET) ; |
| 406 | ** pg72x->block_curr = newblock ; |
| 407 | ** psf_g72x_decode_block (psf, pg72x) ; |
| 408 | ** pg72x->sample_curr = newsample ; |
| 409 | ** } |
| 410 | ** else |
| 411 | ** { /+* What to do about write??? *+/ |
| 412 | ** psf->error = SFE_BAD_SEEK ; |
| 413 | ** return PSF_SEEK_ERROR ; |
| 414 | ** } ; |
| 415 | ** |
| 416 | ** psf->current = newblock * pg72x->samplesperblock + newsample ; |
| 417 | ** return psf->current ; |
| 418 | ** |
| 419 | */ |
| 420 | } /* g72x_seek */ |
| 421 | |
| 422 | /*========================================================================================== |
| 423 | ** G72x Write Functions. |
| 424 | */ |
| 425 | |
| 426 | static int |
| 427 | psf_g72x_encode_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x) |
| 428 | { int k ; |
| 429 | |
| 430 | /* Encode the samples. */ |
| 431 | g72x_encode_block (pg72x->private, pg72x->samples, pg72x->block) ; |
| 432 | |
| 433 | /* Write the block to disk. */ |
| 434 | if ((k = psf_fwrite (pg72x->block, 1, pg72x->blocksize, psf)) != pg72x->blocksize) |
| 435 | psf_log_printf (psf, "*** Warning : short write (%d != %d).\n", k, pg72x->blocksize) ; |
| 436 | |
| 437 | pg72x->sample_curr = 0 ; |
| 438 | pg72x->block_curr ++ ; |
| 439 | |
| 440 | /* Set samples to zero for next block. */ |
| 441 | memset (pg72x->samples, 0, G72x_BLOCK_SIZE * sizeof (short)) ; |
| 442 | |
| 443 | return 1 ; |
| 444 | } /* psf_g72x_encode_block */ |
| 445 | |
| 446 | static int |
| 447 | g72x_write_block (SF_PRIVATE *psf, G72x_PRIVATE *pg72x, const short *ptr, int len) |
| 448 | { int count, total = 0, indx = 0 ; |
| 449 | |
| 450 | while (indx < len) |
| 451 | { count = pg72x->samplesperblock - pg72x->sample_curr ; |
| 452 | |
| 453 | if (count > len - indx) |
| 454 | count = len - indx ; |
| 455 | |
| 456 | memcpy (&(pg72x->samples [pg72x->sample_curr]), &(ptr [indx]), count * sizeof (short)) ; |
| 457 | indx += count ; |
| 458 | pg72x->sample_curr += count ; |
| 459 | total = indx ; |
| 460 | |
| 461 | if (pg72x->sample_curr >= pg72x->samplesperblock) |
| 462 | psf_g72x_encode_block (psf, pg72x) ; |
| 463 | } ; |
| 464 | |
| 465 | return total ; |
| 466 | } /* g72x_write_block */ |
| 467 | |
| 468 | static sf_count_t |
| 469 | g72x_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) |
| 470 | { G72x_PRIVATE *pg72x ; |
| 471 | int writecount, count ; |
| 472 | sf_count_t total = 0 ; |
| 473 | |
| 474 | if (psf->codec_data == NULL) |
| 475 | return 0 ; |
| 476 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 477 | |
| 478 | while (len > 0) |
| 479 | { writecount = (len > 0x10000000) ? 0x10000000 : (int) len ; |
| 480 | |
| 481 | count = g72x_write_block (psf, pg72x, ptr, writecount) ; |
| 482 | |
| 483 | total += count ; |
| 484 | len -= count ; |
| 485 | if (count != writecount) |
| 486 | break ; |
| 487 | } ; |
| 488 | |
| 489 | return total ; |
| 490 | } /* g72x_write_s */ |
| 491 | |
| 492 | static sf_count_t |
| 493 | g72x_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) |
| 494 | { G72x_PRIVATE *pg72x ; |
| 495 | short *sptr ; |
| 496 | int k, bufferlen, writecount = 0, count ; |
| 497 | sf_count_t total = 0 ; |
| 498 | |
| 499 | if (psf->codec_data == NULL) |
| 500 | return 0 ; |
| 501 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 502 | |
| 503 | sptr = psf->u.sbuf ; |
| 504 | bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ; |
| 505 | while (len > 0) |
| 506 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 507 | for (k = 0 ; k < writecount ; k++) |
| 508 | sptr [k] = ptr [total + k] >> 16 ; |
| 509 | count = g72x_write_block (psf, pg72x, sptr, writecount) ; |
| 510 | |
| 511 | total += count ; |
| 512 | len -= writecount ; |
| 513 | if (count != writecount) |
| 514 | break ; |
| 515 | } ; |
| 516 | return total ; |
| 517 | } /* g72x_write_i */ |
| 518 | |
| 519 | static sf_count_t |
| 520 | g72x_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) |
| 521 | { G72x_PRIVATE *pg72x ; |
| 522 | short *sptr ; |
| 523 | int k, bufferlen, writecount = 0, count ; |
| 524 | sf_count_t total = 0 ; |
| 525 | float normfact ; |
| 526 | |
| 527 | if (psf->codec_data == NULL) |
| 528 | return 0 ; |
| 529 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 530 | |
| 531 | normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x8000) : 1.0 ; |
| 532 | |
| 533 | sptr = psf->u.sbuf ; |
| 534 | bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ; |
| 535 | while (len > 0) |
| 536 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 537 | for (k = 0 ; k < writecount ; k++) |
| 538 | sptr [k] = lrintf (normfact * ptr [total + k]) ; |
| 539 | count = g72x_write_block (psf, pg72x, sptr, writecount) ; |
| 540 | |
| 541 | total += count ; |
| 542 | len -= writecount ; |
| 543 | if (count != writecount) |
| 544 | break ; |
| 545 | } ; |
| 546 | |
| 547 | return total ; |
| 548 | } /* g72x_write_f */ |
| 549 | |
| 550 | static sf_count_t |
| 551 | g72x_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) |
| 552 | { G72x_PRIVATE *pg72x ; |
| 553 | short *sptr ; |
| 554 | int k, bufferlen, writecount = 0, count ; |
| 555 | sf_count_t total = 0 ; |
| 556 | double normfact ; |
| 557 | |
| 558 | if (psf->codec_data == NULL) |
| 559 | return 0 ; |
| 560 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 561 | |
| 562 | normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x8000) : 1.0 ; |
| 563 | |
| 564 | sptr = psf->u.sbuf ; |
| 565 | bufferlen = ((SF_BUFFER_LEN / psf->blockwidth) * psf->blockwidth) / sizeof (short) ; |
| 566 | while (len > 0) |
| 567 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 568 | for (k = 0 ; k < writecount ; k++) |
| 569 | sptr [k] = lrint (normfact * ptr [total + k]) ; |
| 570 | count = g72x_write_block (psf, pg72x, sptr, writecount) ; |
| 571 | |
| 572 | total += count ; |
| 573 | len -= writecount ; |
| 574 | if (count != writecount) |
| 575 | break ; |
| 576 | } ; |
| 577 | |
| 578 | return total ; |
| 579 | } /* g72x_write_d */ |
| 580 | |
| 581 | static int |
| 582 | g72x_close (SF_PRIVATE *psf) |
| 583 | { G72x_PRIVATE *pg72x ; |
| 584 | |
| 585 | pg72x = (G72x_PRIVATE*) psf->codec_data ; |
| 586 | |
| 587 | if (psf->file.mode == SFM_WRITE) |
| 588 | { /* If a block has been partially assembled, write it out |
| 589 | ** as the final block. |
| 590 | */ |
| 591 | |
| 592 | if (pg72x->sample_curr && pg72x->sample_curr < G72x_BLOCK_SIZE) |
| 593 | psf_g72x_encode_block (psf, pg72x) ; |
| 594 | |
| 595 | if (psf->write_header) |
| 596 | psf->write_header (psf, SF_FALSE) ; |
| 597 | } ; |
| 598 | |
| 599 | /* Only free the pointer allocated by g72x_(reader|writer)_init. */ |
| 600 | free (pg72x->private) ; |
| 601 | |
| 602 | return 0 ; |
| 603 | } /* g72x_close */ |
| 604 | |