Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2003-2011 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 <fcntl.h> |
| 24 | #include <string.h> |
| 25 | #include <ctype.h> |
| 26 | #include <math.h> |
| 27 | |
| 28 | #include "sndfile.h" |
| 29 | #include "sfendian.h" |
| 30 | #include "common.h" |
| 31 | |
| 32 | #define MAX_XI_SAMPLES 16 |
| 33 | |
| 34 | /*------------------------------------------------------------------------------ |
| 35 | ** Private static functions and tyepdefs. |
| 36 | */ |
| 37 | |
| 38 | typedef struct |
| 39 | { /* Warning, this filename is NOT nul terminated. */ |
| 40 | char filename [22] ; |
| 41 | char software [20] ; |
| 42 | char sample_name [22] ; |
| 43 | |
| 44 | int loop_begin, loop_end ; |
| 45 | int sample_flags ; |
| 46 | |
| 47 | /* Data for encoder and decoder. */ |
| 48 | short last_16 ; |
| 49 | } XI_PRIVATE ; |
| 50 | |
| 51 | static int xi_close (SF_PRIVATE *psf) ; |
| 52 | static int xi_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 53 | static int xi_read_header (SF_PRIVATE *psf) ; |
| 54 | static int dpcm_init (SF_PRIVATE *psf) ; |
| 55 | |
| 56 | |
| 57 | static sf_count_t dpcm_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ; |
| 58 | |
| 59 | /*------------------------------------------------------------------------------ |
| 60 | ** Public function. |
| 61 | */ |
| 62 | |
| 63 | int |
| 64 | xi_open (SF_PRIVATE *psf) |
| 65 | { XI_PRIVATE *pxi ; |
| 66 | int subformat, error = 0 ; |
| 67 | |
| 68 | if (psf->is_pipe) |
| 69 | return SFE_XI_NO_PIPE ; |
| 70 | |
| 71 | if (psf->codec_data) |
| 72 | pxi = psf->codec_data ; |
| 73 | else if ((pxi = calloc (1, sizeof (XI_PRIVATE))) == NULL) |
| 74 | return SFE_MALLOC_FAILED ; |
| 75 | |
| 76 | psf->codec_data = pxi ; |
| 77 | |
| 78 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 79 | { if ((error = xi_read_header (psf))) |
| 80 | return error ; |
| 81 | } ; |
| 82 | |
| 83 | subformat = SF_CODEC (psf->sf.format) ; |
| 84 | |
| 85 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 86 | { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_XI) |
| 87 | return SFE_BAD_OPEN_FORMAT ; |
| 88 | |
| 89 | psf->endian = SF_ENDIAN_LITTLE ; |
| 90 | psf->sf.channels = 1 ; /* Always mono */ |
| 91 | psf->sf.samplerate = 44100 ; /* Always */ |
| 92 | |
| 93 | /* Set up default instrument and software name. */ |
| 94 | memcpy (pxi->filename, "Default Name ", sizeof (pxi->filename)) ; |
| 95 | memcpy (pxi->software, PACKAGE "-" VERSION " ", sizeof (pxi->software)) ; |
| 96 | |
| 97 | memset (pxi->sample_name, 0, sizeof (pxi->sample_name)) ; |
| 98 | snprintf (pxi->sample_name, sizeof (pxi->sample_name), "%s", "Sample #1") ; |
| 99 | |
| 100 | pxi->sample_flags = (subformat == SF_FORMAT_DPCM_16) ? 16 : 0 ; |
| 101 | |
| 102 | if (xi_write_header (psf, SF_FALSE)) |
| 103 | return psf->error ; |
| 104 | |
| 105 | psf->write_header = xi_write_header ; |
| 106 | } ; |
| 107 | |
| 108 | psf->container_close = xi_close ; |
| 109 | psf->seek = dpcm_seek ; |
| 110 | |
| 111 | psf->sf.seekable = SF_FALSE ; |
| 112 | |
| 113 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 114 | |
| 115 | switch (subformat) |
| 116 | { case SF_FORMAT_DPCM_8 : /* 8-bit differential PCM. */ |
| 117 | case SF_FORMAT_DPCM_16 : /* 16-bit differential PCM. */ |
| 118 | error = dpcm_init (psf) ; |
| 119 | break ; |
| 120 | |
| 121 | default : break ; |
| 122 | } ; |
| 123 | |
| 124 | return error ; |
| 125 | } /* xi_open */ |
| 126 | |
| 127 | /*------------------------------------------------------------------------------ |
| 128 | */ |
| 129 | |
| 130 | static int |
| 131 | xi_close (SF_PRIVATE * UNUSED (psf)) |
| 132 | { |
| 133 | return 0 ; |
| 134 | } /* xi_close */ |
| 135 | |
| 136 | /*============================================================================== |
| 137 | */ |
| 138 | |
| 139 | static sf_count_t dpcm_read_dsc2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; |
| 140 | static sf_count_t dpcm_read_dsc2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; |
| 141 | static sf_count_t dpcm_read_dsc2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; |
| 142 | static sf_count_t dpcm_read_dsc2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; |
| 143 | |
| 144 | static sf_count_t dpcm_write_s2dsc (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; |
| 145 | static sf_count_t dpcm_write_i2dsc (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; |
| 146 | static sf_count_t dpcm_write_f2dsc (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; |
| 147 | static sf_count_t dpcm_write_d2dsc (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; |
| 148 | |
| 149 | static sf_count_t dpcm_read_dles2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; |
| 150 | static sf_count_t dpcm_read_dles2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; |
| 151 | static sf_count_t dpcm_read_dles2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; |
| 152 | static sf_count_t dpcm_read_dles2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; |
| 153 | |
| 154 | static sf_count_t dpcm_write_s2dles (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; |
| 155 | static sf_count_t dpcm_write_i2dles (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; |
| 156 | static sf_count_t dpcm_write_f2dles (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; |
| 157 | static sf_count_t dpcm_write_d2dles (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; |
| 158 | |
| 159 | static int |
| 160 | dpcm_init (SF_PRIVATE *psf) |
| 161 | { if (psf->bytewidth == 0 || psf->sf.channels == 0) |
| 162 | return SFE_INTERNAL ; |
| 163 | |
| 164 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 165 | |
| 166 | if (psf->file.mode == SFM_READ || psf->file.mode == SFM_RDWR) |
| 167 | { switch (psf->bytewidth) |
| 168 | { case 1 : |
| 169 | psf->read_short = dpcm_read_dsc2s ; |
| 170 | psf->read_int = dpcm_read_dsc2i ; |
| 171 | psf->read_float = dpcm_read_dsc2f ; |
| 172 | psf->read_double = dpcm_read_dsc2d ; |
| 173 | break ; |
| 174 | case 2 : |
| 175 | psf->read_short = dpcm_read_dles2s ; |
| 176 | psf->read_int = dpcm_read_dles2i ; |
| 177 | psf->read_float = dpcm_read_dles2f ; |
| 178 | psf->read_double = dpcm_read_dles2d ; |
| 179 | break ; |
| 180 | default : |
| 181 | psf_log_printf (psf, "dpcm_init() returning SFE_UNIMPLEMENTED\n") ; |
| 182 | return SFE_UNIMPLEMENTED ; |
| 183 | } ; |
| 184 | } ; |
| 185 | |
| 186 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 187 | { switch (psf->bytewidth) |
| 188 | { case 1 : |
| 189 | psf->write_short = dpcm_write_s2dsc ; |
| 190 | psf->write_int = dpcm_write_i2dsc ; |
| 191 | psf->write_float = dpcm_write_f2dsc ; |
| 192 | psf->write_double = dpcm_write_d2dsc ; |
| 193 | break ; |
| 194 | case 2 : |
| 195 | psf->write_short = dpcm_write_s2dles ; |
| 196 | psf->write_int = dpcm_write_i2dles ; |
| 197 | psf->write_float = dpcm_write_f2dles ; |
| 198 | psf->write_double = dpcm_write_d2dles ; |
| 199 | break ; |
| 200 | default : |
| 201 | psf_log_printf (psf, "dpcm_init() returning SFE_UNIMPLEMENTED\n") ; |
| 202 | return SFE_UNIMPLEMENTED ; |
| 203 | } ; |
| 204 | } ; |
| 205 | |
| 206 | psf->filelength = psf_get_filelen (psf) ; |
| 207 | psf->datalength = (psf->dataend) ? psf->dataend - psf->dataoffset : |
| 208 | psf->filelength - psf->dataoffset ; |
| 209 | psf->sf.frames = psf->datalength / psf->blockwidth ; |
| 210 | |
| 211 | return 0 ; |
| 212 | } /* dpcm_init */ |
| 213 | |
| 214 | /*============================================================================== |
| 215 | */ |
| 216 | |
| 217 | static sf_count_t |
| 218 | dpcm_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) |
| 219 | { XI_PRIVATE *pxi ; |
| 220 | int total, bufferlen, len ; |
| 221 | |
| 222 | if ((pxi = psf->codec_data) == NULL) |
| 223 | return SFE_INTERNAL ; |
| 224 | |
| 225 | if (psf->datalength < 0 || psf->dataoffset < 0) |
| 226 | { psf->error = SFE_BAD_SEEK ; |
| 227 | return PSF_SEEK_ERROR ; |
| 228 | } ; |
| 229 | |
| 230 | if (offset == 0) |
| 231 | { psf_fseek (psf, psf->dataoffset, SEEK_SET) ; |
| 232 | pxi->last_16 = 0 ; |
| 233 | return 0 ; |
| 234 | } ; |
| 235 | |
| 236 | if (offset < 0 || offset > psf->sf.frames) |
| 237 | { psf->error = SFE_BAD_SEEK ; |
| 238 | return PSF_SEEK_ERROR ; |
| 239 | } ; |
| 240 | |
| 241 | if (mode != SFM_READ) |
| 242 | { /* What to do about write??? */ |
| 243 | psf->error = SFE_BAD_SEEK ; |
| 244 | return PSF_SEEK_ERROR ; |
| 245 | } ; |
| 246 | |
| 247 | psf_fseek (psf, psf->dataoffset, SEEK_SET) ; |
| 248 | |
| 249 | if ((SF_CODEC (psf->sf.format)) == SF_FORMAT_DPCM_16) |
| 250 | { total = offset ; |
| 251 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 252 | while (total > 0) |
| 253 | { len = (total > bufferlen) ? bufferlen : total ; |
| 254 | total -= dpcm_read_dles2s (psf, psf->u.sbuf, len) ; |
| 255 | } ; |
| 256 | } |
| 257 | else |
| 258 | { total = offset ; |
| 259 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 260 | while (total > 0) |
| 261 | { len = (total > bufferlen) ? bufferlen : total ; |
| 262 | total -= dpcm_read_dsc2s (psf, psf->u.sbuf, len) ; |
| 263 | } ; |
| 264 | } ; |
| 265 | |
| 266 | return offset ; |
| 267 | } /* dpcm_seek */ |
| 268 | |
| 269 | |
| 270 | static int |
| 271 | xi_write_header (SF_PRIVATE *psf, int UNUSED (calc_length)) |
| 272 | { XI_PRIVATE *pxi ; |
| 273 | sf_count_t current ; |
| 274 | const char *string ; |
| 275 | |
| 276 | if ((pxi = psf->codec_data) == NULL) |
| 277 | return SFE_INTERNAL ; |
| 278 | |
| 279 | current = psf_ftell (psf) ; |
| 280 | |
| 281 | /* Reset the current header length to zero. */ |
| 282 | psf->header [0] = 0 ; |
| 283 | psf->headindex = 0 ; |
| 284 | psf_fseek (psf, 0, SEEK_SET) ; |
| 285 | |
| 286 | string = "Extended Instrument: " ; |
| 287 | psf_binheader_writef (psf, "b", string, strlen (string)) ; |
| 288 | psf_binheader_writef (psf, "b1", pxi->filename, sizeof (pxi->filename), 0x1A) ; |
| 289 | |
| 290 | /* Write software version and two byte XI version. */ |
| 291 | psf_binheader_writef (psf, "eb2", pxi->software, sizeof (pxi->software), (1 << 8) + 2) ; |
| 292 | |
| 293 | /* |
| 294 | ** Jump note numbers (96), volume envelope (48), pan envelope (48), |
| 295 | ** volume points (1), pan points (1) |
| 296 | */ |
| 297 | psf_binheader_writef (psf, "z", (size_t) (96 + 48 + 48 + 1 + 1)) ; |
| 298 | |
| 299 | /* Jump volume loop (3 bytes), pan loop (3), envelope flags (3), vibrato (3) |
| 300 | ** fade out (2), 22 unknown bytes, and then write sample_count (2 bytes). |
| 301 | */ |
| 302 | psf_binheader_writef (psf, "ez2z2", (size_t) (4 * 3), 0x1234, make_size_t (22), 1) ; |
| 303 | |
| 304 | pxi->loop_begin = 0 ; |
| 305 | pxi->loop_end = 0 ; |
| 306 | |
| 307 | psf_binheader_writef (psf, "et844", psf->sf.frames, pxi->loop_begin, pxi->loop_end) ; |
| 308 | |
| 309 | /* volume, fine tune, flags, pan, note, namelen */ |
| 310 | psf_binheader_writef (psf, "111111", 128, 0, pxi->sample_flags, 128, 0, strlen (pxi->sample_name)) ; |
| 311 | |
| 312 | psf_binheader_writef (psf, "b", pxi->sample_name, sizeof (pxi->sample_name)) ; |
| 313 | |
| 314 | |
| 315 | |
| 316 | |
| 317 | |
| 318 | /* Header construction complete so write it out. */ |
| 319 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 320 | |
| 321 | if (psf->error) |
| 322 | return psf->error ; |
| 323 | |
| 324 | psf->dataoffset = psf->headindex ; |
| 325 | |
| 326 | if (current > 0) |
| 327 | psf_fseek (psf, current, SEEK_SET) ; |
| 328 | |
| 329 | return psf->error ; |
| 330 | } /* xi_write_header */ |
| 331 | |
| 332 | static int |
| 333 | xi_read_header (SF_PRIVATE *psf) |
| 334 | { char buffer [64], name [32] ; |
| 335 | short version, fade_out, sample_count ; |
| 336 | int k, loop_begin, loop_end ; |
| 337 | int sample_sizes [MAX_XI_SAMPLES] ; |
| 338 | |
| 339 | psf_binheader_readf (psf, "pb", 0, buffer, 21) ; |
| 340 | |
| 341 | memset (sample_sizes, 0, sizeof (sample_sizes)) ; |
| 342 | |
| 343 | buffer [20] = 0 ; |
| 344 | if (strcmp (buffer, "Extended Instrument:") != 0) |
| 345 | return SFE_XI_BAD_HEADER ; |
| 346 | |
| 347 | memset (buffer, 0, sizeof (buffer)) ; |
| 348 | psf_binheader_readf (psf, "b", buffer, 23) ; |
| 349 | |
| 350 | if (buffer [22] != 0x1A) |
| 351 | return SFE_XI_BAD_HEADER ; |
| 352 | |
| 353 | buffer [22] = 0 ; |
| 354 | psf_log_printf (psf, "Extended Instrument : %s\n", buffer) ; |
| 355 | |
| 356 | psf_binheader_readf (psf, "be2", buffer, 20, &version) ; |
| 357 | buffer [19] = 0 ; |
| 358 | psf_log_printf (psf, "Software : %s\nVersion : %d.%02d\n", buffer, version / 256, version % 256) ; |
| 359 | |
| 360 | /* Jump note numbers (96), volume envelope (48), pan envelope (48), |
| 361 | ** volume points (1), pan points (1) |
| 362 | */ |
| 363 | psf_binheader_readf (psf, "j", 96 + 48 + 48 + 1 + 1) ; |
| 364 | |
| 365 | psf_binheader_readf (psf, "b", buffer, 12) ; |
| 366 | psf_log_printf (psf, "Volume Loop\n sustain : %u\n begin : %u\n end : %u\n", |
| 367 | buffer [0], buffer [1], buffer [2]) ; |
| 368 | psf_log_printf (psf, "Pan Loop\n sustain : %u\n begin : %u\n end : %u\n", |
| 369 | buffer [3], buffer [4], buffer [5]) ; |
| 370 | psf_log_printf (psf, "Envelope Flags\n volume : 0x%X\n pan : 0x%X\n", |
| 371 | buffer [6] & 0xFF, buffer [7] & 0xFF) ; |
| 372 | |
| 373 | psf_log_printf (psf, "Vibrato\n type : %u\n sweep : %u\n depth : %u\n rate : %u\n", |
| 374 | buffer [8], buffer [9], buffer [10], buffer [11]) ; |
| 375 | |
| 376 | /* |
| 377 | ** Read fade_out then jump reserved (2 bytes) and ???? (20 bytes) and |
| 378 | ** sample_count. |
| 379 | */ |
| 380 | psf_binheader_readf (psf, "e2j2", &fade_out, 2 + 20, &sample_count) ; |
| 381 | psf_log_printf (psf, "Fade out : %d\n", fade_out) ; |
| 382 | |
| 383 | /* XI file can contain up to 16 samples. */ |
| 384 | if (sample_count > MAX_XI_SAMPLES) |
| 385 | return SFE_XI_EXCESS_SAMPLES ; |
| 386 | |
| 387 | if (psf->instrument == NULL && (psf->instrument = psf_instrument_alloc ()) == NULL) |
| 388 | return SFE_MALLOC_FAILED ; |
| 389 | |
| 390 | /* Log all data for each sample. */ |
| 391 | for (k = 0 ; k < sample_count ; k++) |
| 392 | { psf_binheader_readf (psf, "e444", &(sample_sizes [k]), &loop_begin, &loop_end) ; |
| 393 | |
| 394 | /* Read 5 know bytes, 1 unknown byte and 22 name bytes. */ |
| 395 | psf_binheader_readf (psf, "bb", buffer, 6, name, 22) ; |
| 396 | name [21] = 0 ; |
| 397 | |
| 398 | psf_log_printf (psf, "Sample #%d\n name : %s\n", k + 1, name) ; |
| 399 | |
| 400 | psf_log_printf (psf, " size : %d\n", sample_sizes [k]) ; |
| 401 | |
| 402 | |
| 403 | |
| 404 | psf_log_printf (psf, " loop\n begin : %d\n end : %d\n", loop_begin, loop_end) ; |
| 405 | |
| 406 | psf_log_printf (psf, " volume : %u\n f. tune : %d\n flags : 0x%02X ", |
| 407 | buffer [0] & 0xFF, buffer [1] & 0xFF, buffer [2] & 0xFF) ; |
| 408 | |
| 409 | psf_log_printf (psf, " (") ; |
| 410 | if (buffer [2] & 1) |
| 411 | psf_log_printf (psf, " Loop") ; |
| 412 | if (buffer [2] & 2) |
| 413 | psf_log_printf (psf, " PingPong") ; |
| 414 | psf_log_printf (psf, (buffer [2] & 16) ? " 16bit" : " 8bit") ; |
| 415 | psf_log_printf (psf, " )\n") ; |
| 416 | |
| 417 | psf_log_printf (psf, " pan : %u\n note : %d\n namelen : %d\n", |
| 418 | buffer [3] & 0xFF, buffer [4], buffer [5]) ; |
| 419 | |
| 420 | if (k != 0) |
| 421 | continue ; |
| 422 | |
| 423 | if (buffer [2] & 16) |
| 424 | { psf->sf.format = SF_FORMAT_XI | SF_FORMAT_DPCM_16 ; |
| 425 | psf->bytewidth = 2 ; |
| 426 | } |
| 427 | else |
| 428 | { psf->sf.format = SF_FORMAT_XI | SF_FORMAT_DPCM_8 ; |
| 429 | psf->bytewidth = 1 ; |
| 430 | } ; |
| 431 | } ; |
| 432 | |
| 433 | while (sample_count > 1 && sample_sizes [sample_count - 1] == 0) |
| 434 | sample_count -- ; |
| 435 | |
| 436 | /* Currently, we can only handle 1 sample per file. */ |
| 437 | |
| 438 | if (sample_count > 2) |
| 439 | { psf_log_printf (psf, "*** Sample count is less than 16 but more than 1.\n") ; |
| 440 | psf_log_printf (psf, " sample count : %d sample_sizes [%d] : %d\n", |
| 441 | sample_count, sample_count - 1, sample_sizes [sample_count - 1]) ; |
| 442 | return SFE_XI_EXCESS_SAMPLES ; |
| 443 | } ; |
| 444 | |
| 445 | psf->datalength = sample_sizes [0] ; |
| 446 | |
| 447 | psf->dataoffset = psf_ftell (psf) ; |
| 448 | if (psf->dataoffset < 0) |
| 449 | { psf_log_printf (psf, "*** Bad Data Offset : %D\n", psf->dataoffset) ; |
| 450 | return SFE_BAD_OFFSET ; |
| 451 | } ; |
| 452 | psf_log_printf (psf, "Data Offset : %D\n", psf->dataoffset) ; |
| 453 | |
| 454 | if (psf->dataoffset + psf->datalength > psf->filelength) |
| 455 | { psf_log_printf (psf, "*** File seems to be truncated. Should be at least %D bytes long.\n", |
| 456 | psf->dataoffset + sample_sizes [0]) ; |
| 457 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 458 | } ; |
| 459 | |
| 460 | if (psf_fseek (psf, psf->dataoffset, SEEK_SET) != psf->dataoffset) |
| 461 | return SFE_BAD_SEEK ; |
| 462 | |
| 463 | psf->endian = SF_ENDIAN_LITTLE ; |
| 464 | psf->sf.channels = 1 ; /* Always mono */ |
| 465 | psf->sf.samplerate = 44100 ; /* Always */ |
| 466 | |
| 467 | psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| 468 | |
| 469 | if (! psf->sf.frames && psf->blockwidth) |
| 470 | psf->sf.frames = (psf->filelength - psf->dataoffset) / psf->blockwidth ; |
| 471 | |
| 472 | psf->instrument->basenote = 0 ; |
| 473 | psf->instrument->gain = 1 ; |
| 474 | psf->instrument->velocity_lo = psf->instrument->key_lo = 0 ; |
| 475 | psf->instrument->velocity_hi = psf->instrument->key_hi = 127 ; |
| 476 | |
| 477 | return 0 ; |
| 478 | } /* xi_read_header */ |
| 479 | |
| 480 | /*============================================================================== |
| 481 | */ |
| 482 | |
| 483 | static void dsc2s_array (XI_PRIVATE *pxi, signed char *src, int count, short *dest) ; |
| 484 | static void dsc2i_array (XI_PRIVATE *pxi, signed char *src, int count, int *dest) ; |
| 485 | static void dsc2f_array (XI_PRIVATE *pxi, signed char *src, int count, float *dest, float normfact) ; |
| 486 | static void dsc2d_array (XI_PRIVATE *pxi, signed char *src, int count, double *dest, double normfact) ; |
| 487 | |
| 488 | static void dles2s_array (XI_PRIVATE *pxi, short *src, int count, short *dest) ; |
| 489 | static void dles2i_array (XI_PRIVATE *pxi, short *src, int count, int *dest) ; |
| 490 | static void dles2f_array (XI_PRIVATE *pxi, short *src, int count, float *dest, float normfact) ; |
| 491 | static void dles2d_array (XI_PRIVATE *pxi, short *src, int count, double *dest, double normfact) ; |
| 492 | |
| 493 | static sf_count_t |
| 494 | dpcm_read_dsc2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) |
| 495 | { XI_PRIVATE *pxi ; |
| 496 | int bufferlen, readcount ; |
| 497 | sf_count_t total = 0 ; |
| 498 | |
| 499 | if ((pxi = psf->codec_data) == NULL) |
| 500 | return 0 ; |
| 501 | |
| 502 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 503 | |
| 504 | while (len > 0) |
| 505 | { if (len < bufferlen) |
| 506 | bufferlen = (int) len ; |
| 507 | readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 508 | dsc2s_array (pxi, psf->u.scbuf, readcount, ptr + total) ; |
| 509 | total += readcount ; |
| 510 | if (readcount < bufferlen) |
| 511 | break ; |
| 512 | len -= readcount ; |
| 513 | } ; |
| 514 | |
| 515 | return total ; |
| 516 | } /* dpcm_read_dsc2s */ |
| 517 | |
| 518 | static sf_count_t |
| 519 | dpcm_read_dsc2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) |
| 520 | { XI_PRIVATE *pxi ; |
| 521 | int bufferlen, readcount ; |
| 522 | sf_count_t total = 0 ; |
| 523 | |
| 524 | if ((pxi = psf->codec_data) == NULL) |
| 525 | return 0 ; |
| 526 | |
| 527 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 528 | |
| 529 | while (len > 0) |
| 530 | { if (len < bufferlen) |
| 531 | bufferlen = (int) len ; |
| 532 | readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 533 | dsc2i_array (pxi, psf->u.scbuf, readcount, ptr + total) ; |
| 534 | total += readcount ; |
| 535 | if (readcount < bufferlen) |
| 536 | break ; |
| 537 | len -= readcount ; |
| 538 | } ; |
| 539 | |
| 540 | return total ; |
| 541 | } /* dpcm_read_dsc2i */ |
| 542 | |
| 543 | static sf_count_t |
| 544 | dpcm_read_dsc2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) |
| 545 | { XI_PRIVATE *pxi ; |
| 546 | int bufferlen, readcount ; |
| 547 | sf_count_t total = 0 ; |
| 548 | float normfact ; |
| 549 | |
| 550 | if ((pxi = psf->codec_data) == NULL) |
| 551 | return 0 ; |
| 552 | |
| 553 | normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x80) : 1.0 ; |
| 554 | |
| 555 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 556 | |
| 557 | while (len > 0) |
| 558 | { if (len < bufferlen) |
| 559 | bufferlen = (int) len ; |
| 560 | readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 561 | dsc2f_array (pxi, psf->u.scbuf, readcount, ptr + total, normfact) ; |
| 562 | total += readcount ; |
| 563 | if (readcount < bufferlen) |
| 564 | break ; |
| 565 | len -= readcount ; |
| 566 | } ; |
| 567 | |
| 568 | return total ; |
| 569 | } /* dpcm_read_dsc2f */ |
| 570 | |
| 571 | static sf_count_t |
| 572 | dpcm_read_dsc2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) |
| 573 | { XI_PRIVATE *pxi ; |
| 574 | int bufferlen, readcount ; |
| 575 | sf_count_t total = 0 ; |
| 576 | double normfact ; |
| 577 | |
| 578 | if ((pxi = psf->codec_data) == NULL) |
| 579 | return 0 ; |
| 580 | |
| 581 | normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x80) : 1.0 ; |
| 582 | |
| 583 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 584 | |
| 585 | while (len > 0) |
| 586 | { if (len < bufferlen) |
| 587 | bufferlen = (int) len ; |
| 588 | readcount = psf_fread (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 589 | dsc2d_array (pxi, psf->u.scbuf, readcount, ptr + total, normfact) ; |
| 590 | total += readcount ; |
| 591 | if (readcount < bufferlen) |
| 592 | break ; |
| 593 | len -= readcount ; |
| 594 | } ; |
| 595 | |
| 596 | return total ; |
| 597 | } /* dpcm_read_dsc2d */ |
| 598 | |
| 599 | /*------------------------------------------------------------------------------ |
| 600 | */ |
| 601 | |
| 602 | static sf_count_t |
| 603 | dpcm_read_dles2s (SF_PRIVATE *psf, short *ptr, sf_count_t len) |
| 604 | { XI_PRIVATE *pxi ; |
| 605 | int bufferlen, readcount ; |
| 606 | sf_count_t total = 0 ; |
| 607 | |
| 608 | if ((pxi = psf->codec_data) == NULL) |
| 609 | return 0 ; |
| 610 | |
| 611 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 612 | |
| 613 | while (len > 0) |
| 614 | { if (len < bufferlen) |
| 615 | bufferlen = (int) len ; |
| 616 | readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 617 | dles2s_array (pxi, psf->u.sbuf, readcount, ptr + total) ; |
| 618 | total += readcount ; |
| 619 | if (readcount < bufferlen) |
| 620 | break ; |
| 621 | len -= readcount ; |
| 622 | } ; |
| 623 | |
| 624 | return total ; |
| 625 | } /* dpcm_read_dles2s */ |
| 626 | |
| 627 | static sf_count_t |
| 628 | dpcm_read_dles2i (SF_PRIVATE *psf, int *ptr, sf_count_t len) |
| 629 | { XI_PRIVATE *pxi ; |
| 630 | int bufferlen, readcount ; |
| 631 | sf_count_t total = 0 ; |
| 632 | |
| 633 | if ((pxi = psf->codec_data) == NULL) |
| 634 | return 0 ; |
| 635 | |
| 636 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 637 | |
| 638 | while (len > 0) |
| 639 | { if (len < bufferlen) |
| 640 | bufferlen = (int) len ; |
| 641 | readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 642 | dles2i_array (pxi, psf->u.sbuf, readcount, ptr + total) ; |
| 643 | total += readcount ; |
| 644 | if (readcount < bufferlen) |
| 645 | break ; |
| 646 | len -= readcount ; |
| 647 | } ; |
| 648 | |
| 649 | return total ; |
| 650 | } /* dpcm_read_dles2i */ |
| 651 | |
| 652 | static sf_count_t |
| 653 | dpcm_read_dles2f (SF_PRIVATE *psf, float *ptr, sf_count_t len) |
| 654 | { XI_PRIVATE *pxi ; |
| 655 | int bufferlen, readcount ; |
| 656 | sf_count_t total = 0 ; |
| 657 | float normfact ; |
| 658 | |
| 659 | if ((pxi = psf->codec_data) == NULL) |
| 660 | return 0 ; |
| 661 | |
| 662 | normfact = (psf->norm_float == SF_TRUE) ? 1.0 / ((float) 0x8000) : 1.0 ; |
| 663 | |
| 664 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 665 | |
| 666 | while (len > 0) |
| 667 | { if (len < bufferlen) |
| 668 | bufferlen = (int) len ; |
| 669 | readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 670 | dles2f_array (pxi, psf->u.sbuf, readcount, ptr + total, normfact) ; |
| 671 | total += readcount ; |
| 672 | if (readcount < bufferlen) |
| 673 | break ; |
| 674 | len -= readcount ; |
| 675 | } ; |
| 676 | |
| 677 | return total ; |
| 678 | } /* dpcm_read_dles2f */ |
| 679 | |
| 680 | static sf_count_t |
| 681 | dpcm_read_dles2d (SF_PRIVATE *psf, double *ptr, sf_count_t len) |
| 682 | { XI_PRIVATE *pxi ; |
| 683 | int bufferlen, readcount ; |
| 684 | sf_count_t total = 0 ; |
| 685 | double normfact ; |
| 686 | |
| 687 | if ((pxi = psf->codec_data) == NULL) |
| 688 | return 0 ; |
| 689 | |
| 690 | normfact = (psf->norm_double == SF_TRUE) ? 1.0 / ((double) 0x8000) : 1.0 ; |
| 691 | |
| 692 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 693 | |
| 694 | while (len > 0) |
| 695 | { if (len < bufferlen) |
| 696 | bufferlen = (int) len ; |
| 697 | readcount = psf_fread (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 698 | dles2d_array (pxi, psf->u.sbuf, readcount, ptr + total, normfact) ; |
| 699 | total += readcount ; |
| 700 | if (readcount < bufferlen) |
| 701 | break ; |
| 702 | len -= readcount ; |
| 703 | } ; |
| 704 | |
| 705 | return total ; |
| 706 | } /* dpcm_read_dles2d */ |
| 707 | |
| 708 | /*============================================================================== |
| 709 | */ |
| 710 | |
| 711 | static void s2dsc_array (XI_PRIVATE *pxi, const short *src, signed char *dest, int count) ; |
| 712 | static void i2dsc_array (XI_PRIVATE *pxi, const int *src, signed char *dest, int count) ; |
| 713 | static void f2dsc_array (XI_PRIVATE *pxi, const float *src, signed char *dest, int count, float normfact) ; |
| 714 | static void d2dsc_array (XI_PRIVATE *pxi, const double *src, signed char *dest, int count, double normfact) ; |
| 715 | |
| 716 | static void s2dles_array (XI_PRIVATE *pxi, const short *src, short *dest, int count) ; |
| 717 | static void i2dles_array (XI_PRIVATE *pxi, const int *src, short *dest, int count) ; |
| 718 | static void f2dles_array (XI_PRIVATE *pxi, const float *src, short *dest, int count, float normfact) ; |
| 719 | static void d2dles_array (XI_PRIVATE *pxi, const double *src, short *dest, int count, double normfact) ; |
| 720 | |
| 721 | |
| 722 | static sf_count_t |
| 723 | dpcm_write_s2dsc (SF_PRIVATE *psf, const short *ptr, sf_count_t len) |
| 724 | { XI_PRIVATE *pxi ; |
| 725 | int bufferlen, writecount ; |
| 726 | sf_count_t total = 0 ; |
| 727 | |
| 728 | if ((pxi = psf->codec_data) == NULL) |
| 729 | return 0 ; |
| 730 | |
| 731 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 732 | |
| 733 | while (len > 0) |
| 734 | { if (len < bufferlen) |
| 735 | bufferlen = (int) len ; |
| 736 | s2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen) ; |
| 737 | writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 738 | total += writecount ; |
| 739 | if (writecount < bufferlen) |
| 740 | break ; |
| 741 | len -= writecount ; |
| 742 | } ; |
| 743 | |
| 744 | return total ; |
| 745 | } /* dpcm_write_s2dsc */ |
| 746 | |
| 747 | static sf_count_t |
| 748 | dpcm_write_i2dsc (SF_PRIVATE *psf, const int *ptr, sf_count_t len) |
| 749 | { XI_PRIVATE *pxi ; |
| 750 | int bufferlen, writecount ; |
| 751 | sf_count_t total = 0 ; |
| 752 | |
| 753 | if ((pxi = psf->codec_data) == NULL) |
| 754 | return 0 ; |
| 755 | |
| 756 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 757 | |
| 758 | while (len > 0) |
| 759 | { if (len < bufferlen) |
| 760 | bufferlen = (int) len ; |
| 761 | i2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen) ; |
| 762 | writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 763 | total += writecount ; |
| 764 | if (writecount < bufferlen) |
| 765 | break ; |
| 766 | len -= writecount ; |
| 767 | } ; |
| 768 | |
| 769 | return total ; |
| 770 | } /* dpcm_write_i2dsc */ |
| 771 | |
| 772 | static sf_count_t |
| 773 | dpcm_write_f2dsc (SF_PRIVATE *psf, const float *ptr, sf_count_t len) |
| 774 | { XI_PRIVATE *pxi ; |
| 775 | int bufferlen, writecount ; |
| 776 | sf_count_t total = 0 ; |
| 777 | float normfact ; |
| 778 | |
| 779 | if ((pxi = psf->codec_data) == NULL) |
| 780 | return 0 ; |
| 781 | |
| 782 | normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7F) : 1.0 ; |
| 783 | |
| 784 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 785 | |
| 786 | while (len > 0) |
| 787 | { if (len < bufferlen) |
| 788 | bufferlen = (int) len ; |
| 789 | f2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen, normfact) ; |
| 790 | writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 791 | total += writecount ; |
| 792 | if (writecount < bufferlen) |
| 793 | break ; |
| 794 | len -= writecount ; |
| 795 | } ; |
| 796 | |
| 797 | return total ; |
| 798 | } /* dpcm_write_f2dsc */ |
| 799 | |
| 800 | static sf_count_t |
| 801 | dpcm_write_d2dsc (SF_PRIVATE *psf, const double *ptr, sf_count_t len) |
| 802 | { XI_PRIVATE *pxi ; |
| 803 | int bufferlen, writecount ; |
| 804 | sf_count_t total = 0 ; |
| 805 | double normfact ; |
| 806 | |
| 807 | if ((pxi = psf->codec_data) == NULL) |
| 808 | return 0 ; |
| 809 | |
| 810 | normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7F) : 1.0 ; |
| 811 | |
| 812 | bufferlen = ARRAY_LEN (psf->u.ucbuf) ; |
| 813 | |
| 814 | while (len > 0) |
| 815 | { if (len < bufferlen) |
| 816 | bufferlen = (int) len ; |
| 817 | d2dsc_array (pxi, ptr + total, psf->u.scbuf, bufferlen, normfact) ; |
| 818 | writecount = psf_fwrite (psf->u.scbuf, sizeof (signed char), bufferlen, psf) ; |
| 819 | total += writecount ; |
| 820 | if (writecount < bufferlen) |
| 821 | break ; |
| 822 | len -= writecount ; |
| 823 | } ; |
| 824 | |
| 825 | return total ; |
| 826 | } /* dpcm_write_d2dsc */ |
| 827 | |
| 828 | |
| 829 | static sf_count_t |
| 830 | dpcm_write_s2dles (SF_PRIVATE *psf, const short *ptr, sf_count_t len) |
| 831 | { XI_PRIVATE *pxi ; |
| 832 | int bufferlen, writecount ; |
| 833 | sf_count_t total = 0 ; |
| 834 | |
| 835 | if ((pxi = psf->codec_data) == NULL) |
| 836 | return 0 ; |
| 837 | |
| 838 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 839 | |
| 840 | while (len > 0) |
| 841 | { if (len < bufferlen) |
| 842 | bufferlen = (int) len ; |
| 843 | s2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen) ; |
| 844 | writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 845 | total += writecount ; |
| 846 | if (writecount < bufferlen) |
| 847 | break ; |
| 848 | len -= writecount ; |
| 849 | } ; |
| 850 | |
| 851 | return total ; |
| 852 | } /* dpcm_write_s2dles */ |
| 853 | |
| 854 | static sf_count_t |
| 855 | dpcm_write_i2dles (SF_PRIVATE *psf, const int *ptr, sf_count_t len) |
| 856 | { XI_PRIVATE *pxi ; |
| 857 | int bufferlen, writecount ; |
| 858 | sf_count_t total = 0 ; |
| 859 | |
| 860 | if ((pxi = psf->codec_data) == NULL) |
| 861 | return 0 ; |
| 862 | |
| 863 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 864 | |
| 865 | while (len > 0) |
| 866 | { if (len < bufferlen) |
| 867 | bufferlen = (int) len ; |
| 868 | i2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen) ; |
| 869 | writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 870 | total += writecount ; |
| 871 | if (writecount < bufferlen) |
| 872 | break ; |
| 873 | len -= writecount ; |
| 874 | } ; |
| 875 | |
| 876 | return total ; |
| 877 | } /* dpcm_write_i2dles */ |
| 878 | |
| 879 | static sf_count_t |
| 880 | dpcm_write_f2dles (SF_PRIVATE *psf, const float *ptr, sf_count_t len) |
| 881 | { XI_PRIVATE *pxi ; |
| 882 | int bufferlen, writecount ; |
| 883 | sf_count_t total = 0 ; |
| 884 | float normfact ; |
| 885 | |
| 886 | if ((pxi = psf->codec_data) == NULL) |
| 887 | return 0 ; |
| 888 | |
| 889 | normfact = (psf->norm_float == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ; |
| 890 | |
| 891 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 892 | |
| 893 | while (len > 0) |
| 894 | { if (len < bufferlen) |
| 895 | bufferlen = (int) len ; |
| 896 | f2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen, normfact) ; |
| 897 | writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 898 | total += writecount ; |
| 899 | if (writecount < bufferlen) |
| 900 | break ; |
| 901 | len -= writecount ; |
| 902 | } ; |
| 903 | |
| 904 | return total ; |
| 905 | } /* dpcm_write_f2dles */ |
| 906 | |
| 907 | static sf_count_t |
| 908 | dpcm_write_d2dles (SF_PRIVATE *psf, const double *ptr, sf_count_t len) |
| 909 | { XI_PRIVATE *pxi ; |
| 910 | int bufferlen, writecount ; |
| 911 | sf_count_t total = 0 ; |
| 912 | double normfact ; |
| 913 | |
| 914 | if ((pxi = psf->codec_data) == NULL) |
| 915 | return 0 ; |
| 916 | |
| 917 | normfact = (psf->norm_double == SF_TRUE) ? (1.0 * 0x7FFF) : 1.0 ; |
| 918 | |
| 919 | bufferlen = ARRAY_LEN (psf->u.sbuf) ; |
| 920 | |
| 921 | while (len > 0) |
| 922 | { if (len < bufferlen) |
| 923 | bufferlen = (int) len ; |
| 924 | d2dles_array (pxi, ptr + total, psf->u.sbuf, bufferlen, normfact) ; |
| 925 | writecount = psf_fwrite (psf->u.sbuf, sizeof (short), bufferlen, psf) ; |
| 926 | total += writecount ; |
| 927 | if (writecount < bufferlen) |
| 928 | break ; |
| 929 | len -= writecount ; |
| 930 | } ; |
| 931 | |
| 932 | return total ; |
| 933 | } /* dpcm_write_d2dles */ |
| 934 | |
| 935 | |
| 936 | /*============================================================================== |
| 937 | */ |
| 938 | |
| 939 | static void |
| 940 | dsc2s_array (XI_PRIVATE *pxi, signed char *src, int count, short *dest) |
| 941 | { signed char last_val ; |
| 942 | int k ; |
| 943 | |
| 944 | last_val = pxi->last_16 >> 8 ; |
| 945 | |
| 946 | for (k = 0 ; k < count ; k++) |
| 947 | { last_val += src [k] ; |
| 948 | dest [k] = last_val << 8 ; |
| 949 | } ; |
| 950 | |
| 951 | pxi->last_16 = last_val << 8 ; |
| 952 | } /* dsc2s_array */ |
| 953 | |
| 954 | static void |
| 955 | dsc2i_array (XI_PRIVATE *pxi, signed char *src, int count, int *dest) |
| 956 | { signed char last_val ; |
| 957 | int k ; |
| 958 | |
| 959 | last_val = pxi->last_16 >> 8 ; |
| 960 | |
| 961 | for (k = 0 ; k < count ; k++) |
| 962 | { last_val += src [k] ; |
| 963 | dest [k] = last_val << 24 ; |
| 964 | } ; |
| 965 | |
| 966 | pxi->last_16 = last_val << 8 ; |
| 967 | } /* dsc2i_array */ |
| 968 | |
| 969 | static void |
| 970 | dsc2f_array (XI_PRIVATE *pxi, signed char *src, int count, float *dest, float normfact) |
| 971 | { signed char last_val ; |
| 972 | int k ; |
| 973 | |
| 974 | last_val = pxi->last_16 >> 8 ; |
| 975 | |
| 976 | for (k = 0 ; k < count ; k++) |
| 977 | { last_val += src [k] ; |
| 978 | dest [k] = last_val * normfact ; |
| 979 | } ; |
| 980 | |
| 981 | pxi->last_16 = last_val << 8 ; |
| 982 | } /* dsc2f_array */ |
| 983 | |
| 984 | static void |
| 985 | dsc2d_array (XI_PRIVATE *pxi, signed char *src, int count, double *dest, double normfact) |
| 986 | { signed char last_val ; |
| 987 | int k ; |
| 988 | |
| 989 | last_val = pxi->last_16 >> 8 ; |
| 990 | |
| 991 | for (k = 0 ; k < count ; k++) |
| 992 | { last_val += src [k] ; |
| 993 | dest [k] = last_val * normfact ; |
| 994 | } ; |
| 995 | |
| 996 | pxi->last_16 = last_val << 8 ; |
| 997 | } /* dsc2d_array */ |
| 998 | |
| 999 | /*------------------------------------------------------------------------------ |
| 1000 | */ |
| 1001 | |
| 1002 | static void |
| 1003 | s2dsc_array (XI_PRIVATE *pxi, const short *src, signed char *dest, int count) |
| 1004 | { signed char last_val, current ; |
| 1005 | int k ; |
| 1006 | |
| 1007 | last_val = pxi->last_16 >> 8 ; |
| 1008 | |
| 1009 | for (k = 0 ; k < count ; k++) |
| 1010 | { current = src [k] >> 8 ; |
| 1011 | dest [k] = current - last_val ; |
| 1012 | last_val = current ; |
| 1013 | } ; |
| 1014 | |
| 1015 | pxi->last_16 = last_val << 8 ; |
| 1016 | } /* s2dsc_array */ |
| 1017 | |
| 1018 | static void |
| 1019 | i2dsc_array (XI_PRIVATE *pxi, const int *src, signed char *dest, int count) |
| 1020 | { signed char last_val, current ; |
| 1021 | int k ; |
| 1022 | |
| 1023 | last_val = pxi->last_16 >> 8 ; |
| 1024 | |
| 1025 | for (k = 0 ; k < count ; k++) |
| 1026 | { current = src [k] >> 24 ; |
| 1027 | dest [k] = current - last_val ; |
| 1028 | last_val = current ; |
| 1029 | } ; |
| 1030 | |
| 1031 | pxi->last_16 = last_val << 8 ; |
| 1032 | } /* i2dsc_array */ |
| 1033 | |
| 1034 | static void |
| 1035 | f2dsc_array (XI_PRIVATE *pxi, const float *src, signed char *dest, int count, float normfact) |
| 1036 | { signed char last_val, current ; |
| 1037 | int k ; |
| 1038 | |
| 1039 | last_val = pxi->last_16 >> 8 ; |
| 1040 | |
| 1041 | for (k = 0 ; k < count ; k++) |
| 1042 | { current = lrintf (src [k] * normfact) ; |
| 1043 | dest [k] = current - last_val ; |
| 1044 | last_val = current ; |
| 1045 | } ; |
| 1046 | |
| 1047 | pxi->last_16 = last_val << 8 ; |
| 1048 | } /* f2dsc_array */ |
| 1049 | |
| 1050 | static void |
| 1051 | d2dsc_array (XI_PRIVATE *pxi, const double *src, signed char *dest, int count, double normfact) |
| 1052 | { signed char last_val, current ; |
| 1053 | int k ; |
| 1054 | |
| 1055 | last_val = pxi->last_16 >> 8 ; |
| 1056 | |
| 1057 | for (k = 0 ; k < count ; k++) |
| 1058 | { current = lrint (src [k] * normfact) ; |
| 1059 | dest [k] = current - last_val ; |
| 1060 | last_val = current ; |
| 1061 | } ; |
| 1062 | |
| 1063 | pxi->last_16 = last_val << 8 ; |
| 1064 | } /* d2dsc_array */ |
| 1065 | |
| 1066 | /*============================================================================== |
| 1067 | */ |
| 1068 | |
| 1069 | static void |
| 1070 | dles2s_array (XI_PRIVATE *pxi, short *src, int count, short *dest) |
| 1071 | { short last_val ; |
| 1072 | int k ; |
| 1073 | |
| 1074 | last_val = pxi->last_16 ; |
| 1075 | |
| 1076 | for (k = 0 ; k < count ; k++) |
| 1077 | { last_val += LES2H_SHORT (src [k]) ; |
| 1078 | dest [k] = last_val ; |
| 1079 | } ; |
| 1080 | |
| 1081 | pxi->last_16 = last_val ; |
| 1082 | } /* dles2s_array */ |
| 1083 | |
| 1084 | static void |
| 1085 | dles2i_array (XI_PRIVATE *pxi, short *src, int count, int *dest) |
| 1086 | { short last_val ; |
| 1087 | int k ; |
| 1088 | |
| 1089 | last_val = pxi->last_16 ; |
| 1090 | |
| 1091 | for (k = 0 ; k < count ; k++) |
| 1092 | { last_val += LES2H_SHORT (src [k]) ; |
| 1093 | dest [k] = last_val << 16 ; |
| 1094 | } ; |
| 1095 | |
| 1096 | pxi->last_16 = last_val ; |
| 1097 | } /* dles2i_array */ |
| 1098 | |
| 1099 | static void |
| 1100 | dles2f_array (XI_PRIVATE *pxi, short *src, int count, float *dest, float normfact) |
| 1101 | { short last_val ; |
| 1102 | int k ; |
| 1103 | |
| 1104 | last_val = pxi->last_16 ; |
| 1105 | |
| 1106 | for (k = 0 ; k < count ; k++) |
| 1107 | { last_val += LES2H_SHORT (src [k]) ; |
| 1108 | dest [k] = last_val * normfact ; |
| 1109 | } ; |
| 1110 | |
| 1111 | pxi->last_16 = last_val ; |
| 1112 | } /* dles2f_array */ |
| 1113 | |
| 1114 | static void |
| 1115 | dles2d_array (XI_PRIVATE *pxi, short *src, int count, double *dest, double normfact) |
| 1116 | { short last_val ; |
| 1117 | int k ; |
| 1118 | |
| 1119 | last_val = pxi->last_16 ; |
| 1120 | |
| 1121 | for (k = 0 ; k < count ; k++) |
| 1122 | { last_val += LES2H_SHORT (src [k]) ; |
| 1123 | dest [k] = last_val * normfact ; |
| 1124 | } ; |
| 1125 | |
| 1126 | pxi->last_16 = last_val ; |
| 1127 | } /* dles2d_array */ |
| 1128 | |
| 1129 | /*------------------------------------------------------------------------------ |
| 1130 | */ |
| 1131 | |
| 1132 | static void |
| 1133 | s2dles_array (XI_PRIVATE *pxi, const short *src, short *dest, int count) |
| 1134 | { short diff, last_val ; |
| 1135 | int k ; |
| 1136 | |
| 1137 | last_val = pxi->last_16 ; |
| 1138 | |
| 1139 | for (k = 0 ; k < count ; k++) |
| 1140 | { diff = src [k] - last_val ; |
| 1141 | dest [k] = LES2H_SHORT (diff) ; |
| 1142 | last_val = src [k] ; |
| 1143 | } ; |
| 1144 | |
| 1145 | pxi->last_16 = last_val ; |
| 1146 | } /* s2dles_array */ |
| 1147 | |
| 1148 | static void |
| 1149 | i2dles_array (XI_PRIVATE *pxi, const int *src, short *dest, int count) |
| 1150 | { short diff, last_val ; |
| 1151 | int k ; |
| 1152 | |
| 1153 | last_val = pxi->last_16 ; |
| 1154 | |
| 1155 | for (k = 0 ; k < count ; k++) |
| 1156 | { diff = (src [k] >> 16) - last_val ; |
| 1157 | dest [k] = LES2H_SHORT (diff) ; |
| 1158 | last_val = src [k] >> 16 ; |
| 1159 | } ; |
| 1160 | |
| 1161 | pxi->last_16 = last_val ; |
| 1162 | } /* i2dles_array */ |
| 1163 | |
| 1164 | static void |
| 1165 | f2dles_array (XI_PRIVATE *pxi, const float *src, short *dest, int count, float normfact) |
| 1166 | { short diff, last_val, current ; |
| 1167 | int k ; |
| 1168 | |
| 1169 | last_val = pxi->last_16 ; |
| 1170 | |
| 1171 | for (k = 0 ; k < count ; k++) |
| 1172 | { current = lrintf (src [k] * normfact) ; |
| 1173 | diff = current - last_val ; |
| 1174 | dest [k] = LES2H_SHORT (diff) ; |
| 1175 | last_val = current ; |
| 1176 | } ; |
| 1177 | |
| 1178 | pxi->last_16 = last_val ; |
| 1179 | } /* f2dles_array */ |
| 1180 | |
| 1181 | static void |
| 1182 | d2dles_array (XI_PRIVATE *pxi, const double *src, short *dest, int count, double normfact) |
| 1183 | { short diff, last_val, current ; |
| 1184 | int k ; |
| 1185 | |
| 1186 | last_val = pxi->last_16 ; |
| 1187 | |
| 1188 | for (k = 0 ; k < count ; k++) |
| 1189 | { current = lrint (src [k] * normfact) ; |
| 1190 | diff = current - last_val ; |
| 1191 | dest [k] = LES2H_SHORT (diff) ; |
| 1192 | last_val = current ; |
| 1193 | } ; |
| 1194 | |
| 1195 | pxi->last_16 = last_val ; |
| 1196 | } /* d2dles_array */ |
| 1197 | |