Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2002-2011 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 | /*------------------------------------------------------------------------------ |
| 33 | */ |
| 34 | |
| 35 | #define SDS_DATA_OFFSET 0x15 |
| 36 | #define SDS_BLOCK_SIZE 127 |
| 37 | |
| 38 | #define SDS_AUDIO_BYTES_PER_BLOCK 120 |
| 39 | |
| 40 | #define SDS_3BYTE_TO_INT_DECODE(x) (((x) & 0x7F) | (((x) & 0x7F00) >> 1) | (((x) & 0x7F0000) >> 2)) |
| 41 | #define SDS_INT_TO_3BYTE_ENCODE(x) (((x) & 0x7F) | (((x) << 1) & 0x7F00) | (((x) << 2) & 0x7F0000)) |
| 42 | |
| 43 | /*------------------------------------------------------------------------------ |
| 44 | ** Typedefs. |
| 45 | */ |
| 46 | |
| 47 | typedef struct tag_SDS_PRIVATE |
| 48 | { int bitwidth, frames ; |
| 49 | int samplesperblock, total_blocks ; |
| 50 | |
| 51 | int (*reader) (SF_PRIVATE *psf, struct tag_SDS_PRIVATE *psds) ; |
| 52 | int (*writer) (SF_PRIVATE *psf, struct tag_SDS_PRIVATE *psds) ; |
| 53 | |
| 54 | int read_block, read_count ; |
| 55 | unsigned char read_data [SDS_BLOCK_SIZE] ; |
| 56 | int read_samples [SDS_BLOCK_SIZE / 2] ; /* Maximum samples per block */ |
| 57 | |
| 58 | int write_block, write_count ; |
| 59 | int total_written ; |
| 60 | unsigned char write_data [SDS_BLOCK_SIZE] ; |
| 61 | int write_samples [SDS_BLOCK_SIZE / 2] ; /* Maximum samples per block */ |
| 62 | } SDS_PRIVATE ; |
| 63 | |
| 64 | /*------------------------------------------------------------------------------ |
| 65 | ** Private static functions. |
| 66 | */ |
| 67 | |
| 68 | static int sds_close (SF_PRIVATE *psf) ; |
| 69 | |
| 70 | static int sds_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 71 | static int sds_read_header (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 72 | |
| 73 | static int sds_init (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 74 | |
| 75 | static sf_count_t sds_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ; |
| 76 | static sf_count_t sds_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ; |
| 77 | static sf_count_t sds_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ; |
| 78 | static sf_count_t sds_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ; |
| 79 | |
| 80 | static sf_count_t sds_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) ; |
| 81 | static sf_count_t sds_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) ; |
| 82 | static sf_count_t sds_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) ; |
| 83 | static sf_count_t sds_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) ; |
| 84 | |
| 85 | static sf_count_t sds_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ; |
| 86 | |
| 87 | static int sds_2byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 88 | static int sds_3byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 89 | static int sds_4byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 90 | |
| 91 | static int sds_read (SF_PRIVATE *psf, SDS_PRIVATE *psds, int *iptr, int readcount) ; |
| 92 | |
| 93 | static int sds_2byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 94 | static int sds_3byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 95 | static int sds_4byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) ; |
| 96 | |
| 97 | static int sds_write (SF_PRIVATE *psf, SDS_PRIVATE *psds, const int *iptr, int writecount) ; |
| 98 | |
| 99 | /*------------------------------------------------------------------------------ |
| 100 | ** Public function. |
| 101 | */ |
| 102 | |
| 103 | int |
| 104 | sds_open (SF_PRIVATE *psf) |
| 105 | { SDS_PRIVATE *psds ; |
| 106 | int error = 0 ; |
| 107 | |
| 108 | /* Hmmmm, need this here to pass update_header_test. */ |
| 109 | psf->sf.frames = 0 ; |
| 110 | |
| 111 | if (! (psds = calloc (1, sizeof (SDS_PRIVATE)))) |
| 112 | return SFE_MALLOC_FAILED ; |
| 113 | psf->codec_data = psds ; |
| 114 | |
| 115 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 116 | { if ((error = sds_read_header (psf, psds))) |
| 117 | return error ; |
| 118 | } ; |
| 119 | |
| 120 | if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_SDS) |
| 121 | return SFE_BAD_OPEN_FORMAT ; |
| 122 | |
| 123 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 124 | { if (sds_write_header (psf, SF_FALSE)) |
| 125 | return psf->error ; |
| 126 | |
| 127 | psf->write_header = sds_write_header ; |
| 128 | |
| 129 | psf_fseek (psf, SDS_DATA_OFFSET, SEEK_SET) ; |
| 130 | } ; |
| 131 | |
| 132 | if ((error = sds_init (psf, psds)) != 0) |
| 133 | return error ; |
| 134 | |
| 135 | psf->seek = sds_seek ; |
| 136 | psf->container_close = sds_close ; |
| 137 | |
| 138 | psf->blockwidth = 0 ; |
| 139 | |
| 140 | return error ; |
| 141 | } /* sds_open */ |
| 142 | |
| 143 | /*------------------------------------------------------------------------------ |
| 144 | */ |
| 145 | |
| 146 | static int |
| 147 | sds_close (SF_PRIVATE *psf) |
| 148 | { |
| 149 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 150 | { SDS_PRIVATE *psds ; |
| 151 | |
| 152 | if ((psds = (SDS_PRIVATE *) psf->codec_data) == NULL) |
| 153 | { psf_log_printf (psf, "*** Bad psf->codec_data ptr.\n") ; |
| 154 | return SFE_INTERNAL ; |
| 155 | } ; |
| 156 | |
| 157 | if (psds->write_count > 0) |
| 158 | { memset (&(psds->write_data [psds->write_count]), 0, (psds->samplesperblock - psds->write_count) * sizeof (int)) ; |
| 159 | psds->writer (psf, psds) ; |
| 160 | } ; |
| 161 | |
| 162 | sds_write_header (psf, SF_TRUE) ; |
| 163 | } ; |
| 164 | |
| 165 | return 0 ; |
| 166 | } /* sds_close */ |
| 167 | |
| 168 | static int |
| 169 | sds_init (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 170 | { |
| 171 | if (psds->bitwidth < 8 || psds->bitwidth > 28) |
| 172 | return (psf->error = SFE_SDS_BAD_BIT_WIDTH) ; |
| 173 | |
| 174 | if (psds->bitwidth < 14) |
| 175 | { psds->reader = sds_2byte_read ; |
| 176 | psds->writer = sds_2byte_write ; |
| 177 | psds->samplesperblock = SDS_AUDIO_BYTES_PER_BLOCK / 2 ; |
| 178 | } |
| 179 | else if (psds->bitwidth < 21) |
| 180 | { psds->reader = sds_3byte_read ; |
| 181 | psds->writer = sds_3byte_write ; |
| 182 | psds->samplesperblock = SDS_AUDIO_BYTES_PER_BLOCK / 3 ; |
| 183 | } |
| 184 | else |
| 185 | { psds->reader = sds_4byte_read ; |
| 186 | psds->writer = sds_4byte_write ; |
| 187 | psds->samplesperblock = SDS_AUDIO_BYTES_PER_BLOCK / 4 ; |
| 188 | } ; |
| 189 | |
| 190 | if (psf->file.mode == SFM_READ || psf->file.mode == SFM_RDWR) |
| 191 | { psf->read_short = sds_read_s ; |
| 192 | psf->read_int = sds_read_i ; |
| 193 | psf->read_float = sds_read_f ; |
| 194 | psf->read_double = sds_read_d ; |
| 195 | |
| 196 | /* Read first block. */ |
| 197 | psds->reader (psf, psds) ; |
| 198 | } ; |
| 199 | |
| 200 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 201 | { psf->write_short = sds_write_s ; |
| 202 | psf->write_int = sds_write_i ; |
| 203 | psf->write_float = sds_write_f ; |
| 204 | psf->write_double = sds_write_d ; |
| 205 | } ; |
| 206 | |
| 207 | return 0 ; |
| 208 | } /* sds_init */ |
| 209 | |
| 210 | static int |
| 211 | sds_read_header (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 212 | { unsigned char channel, bitwidth, loop_type, byte ; |
| 213 | unsigned short sample_no, marker ; |
| 214 | unsigned int samp_period, data_length, sustain_loop_start, sustain_loop_end ; |
| 215 | int bytesread, blockcount ; |
| 216 | |
| 217 | /* Set position to start of file to begin reading header. */ |
| 218 | bytesread = psf_binheader_readf (psf, "pE211", 0, &marker, &channel, &byte) ; |
| 219 | |
| 220 | if (marker != 0xF07E || byte != 0x01) |
| 221 | return SFE_SDS_NOT_SDS ; |
| 222 | |
| 223 | bytesread += psf_binheader_readf (psf, "e2", &sample_no) ; |
| 224 | sample_no = SDS_3BYTE_TO_INT_DECODE (sample_no) ; |
| 225 | |
| 226 | psf_log_printf (psf, "Midi Sample Dump Standard (.sds)\nF07E\n" |
| 227 | " Midi Channel : %d\n Sample Number : %d\n", |
| 228 | channel, sample_no) ; |
| 229 | |
| 230 | bytesread += psf_binheader_readf (psf, "e13", &bitwidth, &samp_period) ; |
| 231 | |
| 232 | samp_period = SDS_3BYTE_TO_INT_DECODE (samp_period) ; |
| 233 | |
| 234 | psds->bitwidth = bitwidth ; |
| 235 | |
| 236 | if (psds->bitwidth > 1) |
| 237 | psf_log_printf (psf, " Bit Width : %d\n", psds->bitwidth) ; |
| 238 | else |
| 239 | { psf_log_printf (psf, " Bit Width : %d (should be > 1)\n", psds->bitwidth) ; |
| 240 | return SFE_SDS_BAD_BIT_WIDTH ; |
| 241 | } ; |
| 242 | |
| 243 | if (samp_period > 0) |
| 244 | { psf->sf.samplerate = 1000000000 / samp_period ; |
| 245 | |
| 246 | psf_log_printf (psf, " Sample Period : %d\n" |
| 247 | " Sample Rate : %d\n", |
| 248 | samp_period, psf->sf.samplerate) ; |
| 249 | } |
| 250 | else |
| 251 | { psf->sf.samplerate = 16000 ; |
| 252 | |
| 253 | psf_log_printf (psf, " Sample Period : %d (should be > 0)\n" |
| 254 | " Sample Rate : %d (guessed)\n", |
| 255 | samp_period, psf->sf.samplerate) ; |
| 256 | } ; |
| 257 | |
| 258 | bytesread += psf_binheader_readf (psf, "e3331", &data_length, &sustain_loop_start, &sustain_loop_end, &loop_type) ; |
| 259 | |
| 260 | data_length = SDS_3BYTE_TO_INT_DECODE (data_length) ; |
| 261 | |
| 262 | psf->sf.frames = psds->frames = data_length ; |
| 263 | |
| 264 | sustain_loop_start = SDS_3BYTE_TO_INT_DECODE (sustain_loop_start) ; |
| 265 | sustain_loop_end = SDS_3BYTE_TO_INT_DECODE (sustain_loop_end) ; |
| 266 | |
| 267 | psf_log_printf (psf, " Sustain Loop\n" |
| 268 | " Start : %d\n" |
| 269 | " End : %d\n" |
| 270 | " Loop Type : %d\n", |
| 271 | sustain_loop_start, sustain_loop_end, loop_type) ; |
| 272 | |
| 273 | psf->dataoffset = SDS_DATA_OFFSET ; |
| 274 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 275 | |
| 276 | bytesread += psf_binheader_readf (psf, "1", &byte) ; |
| 277 | if (byte != 0xF7) |
| 278 | psf_log_printf (psf, "bad end : %X\n", byte & 0xFF) ; |
| 279 | |
| 280 | for (blockcount = 0 ; bytesread < psf->filelength ; blockcount++) |
| 281 | { |
| 282 | bytesread += psf_fread (&marker, 1, 2, psf) ; |
| 283 | |
| 284 | if (marker == 0) |
| 285 | break ; |
| 286 | |
| 287 | psf_fseek (psf, SDS_BLOCK_SIZE - 2, SEEK_CUR) ; |
| 288 | bytesread += SDS_BLOCK_SIZE - 2 ; |
| 289 | } ; |
| 290 | |
| 291 | psf_log_printf (psf, "\nBlocks : %d\n", blockcount) ; |
| 292 | psds->total_blocks = blockcount ; |
| 293 | |
| 294 | psds->samplesperblock = SDS_AUDIO_BYTES_PER_BLOCK / ((psds->bitwidth + 6) / 7) ; |
| 295 | psf_log_printf (psf, "Samples/Block : %d\n", psds->samplesperblock) ; |
| 296 | |
| 297 | psf_log_printf (psf, "Frames : %d\n", blockcount * psds->samplesperblock) ; |
| 298 | |
| 299 | /* Always Mono */ |
| 300 | psf->sf.channels = 1 ; |
| 301 | psf->sf.sections = 1 ; |
| 302 | |
| 303 | /* |
| 304 | ** Lie to the user about PCM bit width. Always round up to |
| 305 | ** the next multiple of 8. |
| 306 | */ |
| 307 | switch ((psds->bitwidth + 7) / 8) |
| 308 | { case 1 : |
| 309 | psf->sf.format = SF_FORMAT_SDS | SF_FORMAT_PCM_S8 ; |
| 310 | break ; |
| 311 | |
| 312 | case 2 : |
| 313 | psf->sf.format = SF_FORMAT_SDS | SF_FORMAT_PCM_16 ; |
| 314 | break ; |
| 315 | |
| 316 | case 3 : |
| 317 | psf->sf.format = SF_FORMAT_SDS | SF_FORMAT_PCM_24 ; |
| 318 | break ; |
| 319 | |
| 320 | case 4 : |
| 321 | psf->sf.format = SF_FORMAT_SDS | SF_FORMAT_PCM_32 ; |
| 322 | break ; |
| 323 | |
| 324 | default : |
| 325 | psf_log_printf (psf, "*** Weird byte width (%d)\n", (psds->bitwidth + 7) / 8) ; |
| 326 | return SFE_SDS_BAD_BIT_WIDTH ; |
| 327 | } ; |
| 328 | |
| 329 | psf_fseek (psf, SDS_DATA_OFFSET, SEEK_SET) ; |
| 330 | |
| 331 | return 0 ; |
| 332 | } /* sds_read_header */ |
| 333 | |
| 334 | static int |
| 335 | sds_write_header (SF_PRIVATE *psf, int calc_length) |
| 336 | { SDS_PRIVATE *psds ; |
| 337 | sf_count_t current ; |
| 338 | int samp_period, data_length, sustain_loop_start, sustain_loop_end ; |
| 339 | unsigned char loop_type = 0 ; |
| 340 | |
| 341 | if ((psds = (SDS_PRIVATE *) psf->codec_data) == NULL) |
| 342 | { psf_log_printf (psf, "*** Bad psf->codec_data ptr.\n") ; |
| 343 | return SFE_INTERNAL ; |
| 344 | } ; |
| 345 | |
| 346 | if (psf->pipeoffset > 0) |
| 347 | return 0 ; |
| 348 | |
| 349 | current = psf_ftell (psf) ; |
| 350 | |
| 351 | if (calc_length) |
| 352 | psf->sf.frames = psds->total_written ; |
| 353 | |
| 354 | if (psds->write_count > 0) |
| 355 | { int current_count = psds->write_count ; |
| 356 | int current_block = psds->write_block ; |
| 357 | |
| 358 | psds->writer (psf, psds) ; |
| 359 | |
| 360 | psf_fseek (psf, -1 * SDS_BLOCK_SIZE, SEEK_CUR) ; |
| 361 | |
| 362 | psds->write_count = current_count ; |
| 363 | psds->write_block = current_block ; |
| 364 | } ; |
| 365 | |
| 366 | /* Reset the current header length to zero. */ |
| 367 | psf->header [0] = 0 ; |
| 368 | psf->headindex = 0 ; |
| 369 | |
| 370 | if (psf->is_pipe == SF_FALSE) |
| 371 | psf_fseek (psf, 0, SEEK_SET) ; |
| 372 | |
| 373 | psf_binheader_writef (psf, "E211", 0xF07E, 0, 1) ; |
| 374 | |
| 375 | switch (SF_CODEC (psf->sf.format)) |
| 376 | { case SF_FORMAT_PCM_S8 : |
| 377 | psds->bitwidth = 8 ; |
| 378 | break ; |
| 379 | case SF_FORMAT_PCM_16 : |
| 380 | psds->bitwidth = 16 ; |
| 381 | break ; |
| 382 | case SF_FORMAT_PCM_24 : |
| 383 | psds->bitwidth = 24 ; |
| 384 | break ; |
| 385 | default: |
| 386 | return SFE_SDS_BAD_BIT_WIDTH ; |
| 387 | } ; |
| 388 | |
| 389 | samp_period = SDS_INT_TO_3BYTE_ENCODE (1000000000 / psf->sf.samplerate) ; |
| 390 | |
| 391 | psf_binheader_writef (psf, "e213", 0, psds->bitwidth, samp_period) ; |
| 392 | |
| 393 | data_length = SDS_INT_TO_3BYTE_ENCODE (psds->total_written) ; |
| 394 | sustain_loop_start = SDS_INT_TO_3BYTE_ENCODE (0) ; |
| 395 | sustain_loop_end = SDS_INT_TO_3BYTE_ENCODE (0) ; |
| 396 | |
| 397 | psf_binheader_writef (psf, "e33311", data_length, sustain_loop_start, sustain_loop_end, loop_type, 0xF7) ; |
| 398 | |
| 399 | /* Header construction complete so write it out. */ |
| 400 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 401 | |
| 402 | if (psf->error) |
| 403 | return psf->error ; |
| 404 | |
| 405 | psf->dataoffset = psf->headindex ; |
| 406 | psf->datalength = psds->write_block * SDS_BLOCK_SIZE ; |
| 407 | |
| 408 | if (current > 0) |
| 409 | psf_fseek (psf, current, SEEK_SET) ; |
| 410 | |
| 411 | return psf->error ; |
| 412 | } /* sds_write_header */ |
| 413 | |
| 414 | |
| 415 | /*------------------------------------------------------------------------------ |
| 416 | */ |
| 417 | |
| 418 | static int |
| 419 | sds_2byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 420 | { unsigned char *ucptr, checksum ; |
| 421 | unsigned int sample ; |
| 422 | int k ; |
| 423 | |
| 424 | psds->read_block ++ ; |
| 425 | psds->read_count = 0 ; |
| 426 | |
| 427 | if (psds->read_block * psds->samplesperblock > psds->frames) |
| 428 | { memset (psds->read_samples, 0, psds->samplesperblock * sizeof (int)) ; |
| 429 | return 1 ; |
| 430 | } ; |
| 431 | |
| 432 | if ((k = psf_fread (psds->read_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 433 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 434 | |
| 435 | if (psds->read_data [0] != 0xF0) |
| 436 | { printf ("Error A : %02X\n", psds->read_data [0] & 0xFF) ; |
| 437 | } ; |
| 438 | |
| 439 | checksum = psds->read_data [1] ; |
| 440 | if (checksum != 0x7E) |
| 441 | { printf ("Error 1 : %02X\n", checksum & 0xFF) ; |
| 442 | } |
| 443 | |
| 444 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 445 | checksum ^= psds->read_data [k] ; |
| 446 | |
| 447 | checksum &= 0x7F ; |
| 448 | |
| 449 | if (checksum != psds->read_data [SDS_BLOCK_SIZE - 2]) |
| 450 | { psf_log_printf (psf, "Block %d : checksum is %02X should be %02X\n", psds->read_data [4], checksum, psds->read_data [SDS_BLOCK_SIZE - 2]) ; |
| 451 | } ; |
| 452 | |
| 453 | ucptr = psds->read_data + 5 ; |
| 454 | for (k = 0 ; k < 120 ; k += 2) |
| 455 | { sample = (ucptr [k] << 25) + (ucptr [k + 1] << 18) ; |
| 456 | psds->read_samples [k / 2] = (int) (sample - 0x80000000) ; |
| 457 | } ; |
| 458 | |
| 459 | return 1 ; |
| 460 | } /* sds_2byte_read */ |
| 461 | |
| 462 | static int |
| 463 | sds_3byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 464 | { unsigned char *ucptr, checksum ; |
| 465 | unsigned int sample ; |
| 466 | int k ; |
| 467 | |
| 468 | psds->read_block ++ ; |
| 469 | psds->read_count = 0 ; |
| 470 | |
| 471 | if (psds->read_block * psds->samplesperblock > psds->frames) |
| 472 | { memset (psds->read_samples, 0, psds->samplesperblock * sizeof (int)) ; |
| 473 | return 1 ; |
| 474 | } ; |
| 475 | |
| 476 | if ((k = psf_fread (psds->read_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 477 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 478 | |
| 479 | if (psds->read_data [0] != 0xF0) |
| 480 | { printf ("Error A : %02X\n", psds->read_data [0] & 0xFF) ; |
| 481 | } ; |
| 482 | |
| 483 | checksum = psds->read_data [1] ; |
| 484 | if (checksum != 0x7E) |
| 485 | { printf ("Error 1 : %02X\n", checksum & 0xFF) ; |
| 486 | } |
| 487 | |
| 488 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 489 | checksum ^= psds->read_data [k] ; |
| 490 | |
| 491 | checksum &= 0x7F ; |
| 492 | |
| 493 | if (checksum != psds->read_data [SDS_BLOCK_SIZE - 2]) |
| 494 | { psf_log_printf (psf, "Block %d : checksum is %02X should be %02X\n", psds->read_data [4], checksum, psds->read_data [SDS_BLOCK_SIZE - 2]) ; |
| 495 | } ; |
| 496 | |
| 497 | ucptr = psds->read_data + 5 ; |
| 498 | for (k = 0 ; k < 120 ; k += 3) |
| 499 | { sample = (ucptr [k] << 25) + (ucptr [k + 1] << 18) + (ucptr [k + 2] << 11) ; |
| 500 | psds->read_samples [k / 3] = (int) (sample - 0x80000000) ; |
| 501 | } ; |
| 502 | |
| 503 | return 1 ; |
| 504 | } /* sds_3byte_read */ |
| 505 | |
| 506 | static int |
| 507 | sds_4byte_read (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 508 | { unsigned char *ucptr, checksum ; |
| 509 | unsigned int sample ; |
| 510 | int k ; |
| 511 | |
| 512 | psds->read_block ++ ; |
| 513 | psds->read_count = 0 ; |
| 514 | |
| 515 | if (psds->read_block * psds->samplesperblock > psds->frames) |
| 516 | { memset (psds->read_samples, 0, psds->samplesperblock * sizeof (int)) ; |
| 517 | return 1 ; |
| 518 | } ; |
| 519 | |
| 520 | if ((k = psf_fread (psds->read_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 521 | psf_log_printf (psf, "*** Warning : short read (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 522 | |
| 523 | if (psds->read_data [0] != 0xF0) |
| 524 | { printf ("Error A : %02X\n", psds->read_data [0] & 0xFF) ; |
| 525 | } ; |
| 526 | |
| 527 | checksum = psds->read_data [1] ; |
| 528 | if (checksum != 0x7E) |
| 529 | { printf ("Error 1 : %02X\n", checksum & 0xFF) ; |
| 530 | } |
| 531 | |
| 532 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 533 | checksum ^= psds->read_data [k] ; |
| 534 | |
| 535 | checksum &= 0x7F ; |
| 536 | |
| 537 | if (checksum != psds->read_data [SDS_BLOCK_SIZE - 2]) |
| 538 | { psf_log_printf (psf, "Block %d : checksum is %02X should be %02X\n", psds->read_data [4], checksum, psds->read_data [SDS_BLOCK_SIZE - 2]) ; |
| 539 | } ; |
| 540 | |
| 541 | ucptr = psds->read_data + 5 ; |
| 542 | for (k = 0 ; k < 120 ; k += 4) |
| 543 | { sample = (ucptr [k] << 25) + (ucptr [k + 1] << 18) + (ucptr [k + 2] << 11) + (ucptr [k + 3] << 4) ; |
| 544 | psds->read_samples [k / 4] = (int) (sample - 0x80000000) ; |
| 545 | } ; |
| 546 | |
| 547 | return 1 ; |
| 548 | } /* sds_4byte_read */ |
| 549 | |
| 550 | |
| 551 | static sf_count_t |
| 552 | sds_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) |
| 553 | { SDS_PRIVATE *psds ; |
| 554 | int *iptr ; |
| 555 | int k, bufferlen, readcount, count ; |
| 556 | sf_count_t total = 0 ; |
| 557 | |
| 558 | if (psf->codec_data == NULL) |
| 559 | return 0 ; |
| 560 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 561 | |
| 562 | iptr = psf->u.ibuf ; |
| 563 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 564 | while (len > 0) |
| 565 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 566 | count = sds_read (psf, psds, iptr, readcount) ; |
| 567 | for (k = 0 ; k < readcount ; k++) |
| 568 | ptr [total + k] = iptr [k] >> 16 ; |
| 569 | total += count ; |
| 570 | len -= readcount ; |
| 571 | } ; |
| 572 | |
| 573 | return total ; |
| 574 | } /* sds_read_s */ |
| 575 | |
| 576 | static sf_count_t |
| 577 | sds_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) |
| 578 | { SDS_PRIVATE *psds ; |
| 579 | int total ; |
| 580 | |
| 581 | if (psf->codec_data == NULL) |
| 582 | return 0 ; |
| 583 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 584 | |
| 585 | total = sds_read (psf, psds, ptr, len) ; |
| 586 | |
| 587 | return total ; |
| 588 | } /* sds_read_i */ |
| 589 | |
| 590 | static sf_count_t |
| 591 | sds_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) |
| 592 | { SDS_PRIVATE *psds ; |
| 593 | int *iptr ; |
| 594 | int k, bufferlen, readcount, count ; |
| 595 | sf_count_t total = 0 ; |
| 596 | float normfact ; |
| 597 | |
| 598 | if (psf->codec_data == NULL) |
| 599 | return 0 ; |
| 600 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 601 | |
| 602 | if (psf->norm_float == SF_TRUE) |
| 603 | normfact = 1.0 / 0x80000000 ; |
| 604 | else |
| 605 | normfact = 1.0 / (1 << psds->bitwidth) ; |
| 606 | |
| 607 | iptr = psf->u.ibuf ; |
| 608 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 609 | while (len > 0) |
| 610 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 611 | count = sds_read (psf, psds, iptr, readcount) ; |
| 612 | for (k = 0 ; k < readcount ; k++) |
| 613 | ptr [total + k] = normfact * iptr [k] ; |
| 614 | total += count ; |
| 615 | len -= readcount ; |
| 616 | } ; |
| 617 | |
| 618 | return total ; |
| 619 | } /* sds_read_f */ |
| 620 | |
| 621 | static sf_count_t |
| 622 | sds_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) |
| 623 | { SDS_PRIVATE *psds ; |
| 624 | int *iptr ; |
| 625 | int k, bufferlen, readcount, count ; |
| 626 | sf_count_t total = 0 ; |
| 627 | double normfact ; |
| 628 | |
| 629 | if (psf->codec_data == NULL) |
| 630 | return 0 ; |
| 631 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 632 | |
| 633 | if (psf->norm_double == SF_TRUE) |
| 634 | normfact = 1.0 / 0x80000000 ; |
| 635 | else |
| 636 | normfact = 1.0 / (1 << psds->bitwidth) ; |
| 637 | |
| 638 | iptr = psf->u.ibuf ; |
| 639 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 640 | while (len > 0) |
| 641 | { readcount = (len >= bufferlen) ? bufferlen : len ; |
| 642 | count = sds_read (psf, psds, iptr, readcount) ; |
| 643 | for (k = 0 ; k < readcount ; k++) |
| 644 | ptr [total + k] = normfact * iptr [k] ; |
| 645 | total += count ; |
| 646 | len -= readcount ; |
| 647 | } ; |
| 648 | |
| 649 | return total ; |
| 650 | } /* sds_read_d */ |
| 651 | |
| 652 | static int |
| 653 | sds_read (SF_PRIVATE *psf, SDS_PRIVATE *psds, int *ptr, int len) |
| 654 | { int count, total = 0 ; |
| 655 | |
| 656 | while (total < len) |
| 657 | { if (psds->read_block * psds->samplesperblock >= psds->frames) |
| 658 | { memset (&(ptr [total]), 0, (len - total) * sizeof (int)) ; |
| 659 | return total ; |
| 660 | } ; |
| 661 | |
| 662 | if (psds->read_count >= psds->samplesperblock) |
| 663 | psds->reader (psf, psds) ; |
| 664 | |
| 665 | count = (psds->samplesperblock - psds->read_count) ; |
| 666 | count = (len - total > count) ? count : len - total ; |
| 667 | |
| 668 | memcpy (&(ptr [total]), &(psds->read_samples [psds->read_count]), count * sizeof (int)) ; |
| 669 | total += count ; |
| 670 | psds->read_count += count ; |
| 671 | } ; |
| 672 | |
| 673 | return total ; |
| 674 | } /* sds_read */ |
| 675 | |
| 676 | /*============================================================================== |
| 677 | */ |
| 678 | |
| 679 | static sf_count_t |
| 680 | sds_seek (SF_PRIVATE *psf, int mode, sf_count_t seek_from_start) |
| 681 | { SDS_PRIVATE *psds ; |
| 682 | sf_count_t file_offset ; |
| 683 | int newblock, newsample ; |
| 684 | |
| 685 | if ((psds = psf->codec_data) == NULL) |
| 686 | { psf->error = SFE_INTERNAL ; |
| 687 | return PSF_SEEK_ERROR ; |
| 688 | } ; |
| 689 | |
| 690 | if (psf->datalength < 0 || psf->dataoffset < 0) |
| 691 | { psf->error = SFE_BAD_SEEK ; |
| 692 | return PSF_SEEK_ERROR ; |
| 693 | } ; |
| 694 | |
| 695 | if (seek_from_start < 0 || seek_from_start > psf->sf.frames) |
| 696 | { psf->error = SFE_BAD_SEEK ; |
| 697 | return PSF_SEEK_ERROR ; |
| 698 | } ; |
| 699 | |
| 700 | if (mode == SFM_READ && psds->write_count > 0) |
| 701 | psds->writer (psf, psds) ; |
| 702 | |
| 703 | newblock = seek_from_start / psds->samplesperblock ; |
| 704 | newsample = seek_from_start % psds->samplesperblock ; |
| 705 | |
| 706 | switch (mode) |
| 707 | { case SFM_READ : |
| 708 | if (newblock > psds->total_blocks) |
| 709 | { psf->error = SFE_BAD_SEEK ; |
| 710 | return PSF_SEEK_ERROR ; |
| 711 | } ; |
| 712 | |
| 713 | file_offset = psf->dataoffset + newblock * SDS_BLOCK_SIZE ; |
| 714 | |
| 715 | if (psf_fseek (psf, file_offset, SEEK_SET) != file_offset) |
| 716 | { psf->error = SFE_SEEK_FAILED ; |
| 717 | return PSF_SEEK_ERROR ; |
| 718 | } ; |
| 719 | |
| 720 | psds->read_block = newblock ; |
| 721 | psds->reader (psf, psds) ; |
| 722 | psds->read_count = newsample ; |
| 723 | break ; |
| 724 | |
| 725 | case SFM_WRITE : |
| 726 | if (newblock > psds->total_blocks) |
| 727 | { psf->error = SFE_BAD_SEEK ; |
| 728 | return PSF_SEEK_ERROR ; |
| 729 | } ; |
| 730 | |
| 731 | file_offset = psf->dataoffset + newblock * SDS_BLOCK_SIZE ; |
| 732 | |
| 733 | if (psf_fseek (psf, file_offset, SEEK_SET) != file_offset) |
| 734 | { psf->error = SFE_SEEK_FAILED ; |
| 735 | return PSF_SEEK_ERROR ; |
| 736 | } ; |
| 737 | |
| 738 | psds->write_block = newblock ; |
| 739 | psds->reader (psf, psds) ; |
| 740 | psds->write_count = newsample ; |
| 741 | break ; |
| 742 | |
| 743 | default : |
| 744 | psf->error = SFE_BAD_SEEK ; |
| 745 | return PSF_SEEK_ERROR ; |
| 746 | break ; |
| 747 | } ; |
| 748 | |
| 749 | return seek_from_start ; |
| 750 | } /* sds_seek */ |
| 751 | |
| 752 | /*============================================================================== |
| 753 | */ |
| 754 | |
| 755 | static int |
| 756 | sds_2byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 757 | { unsigned char *ucptr, checksum ; |
| 758 | unsigned int sample ; |
| 759 | int k ; |
| 760 | |
| 761 | psds->write_data [0] = 0xF0 ; |
| 762 | psds->write_data [1] = 0x7E ; |
| 763 | psds->write_data [2] = 0 ; /* Channel number */ |
| 764 | psds->write_data [3] = 2 ; |
| 765 | psds->write_data [4] = psds->write_block & 0x7F ; /* Packet number */ |
| 766 | |
| 767 | ucptr = psds->write_data + 5 ; |
| 768 | for (k = 0 ; k < 120 ; k += 2) |
| 769 | { sample = psds->write_samples [k / 2] ; |
| 770 | sample += 0x80000000 ; |
| 771 | ucptr [k] = (sample >> 25) & 0x7F ; |
| 772 | ucptr [k + 1] = (sample >> 18) & 0x7F ; |
| 773 | } ; |
| 774 | |
| 775 | checksum = psds->write_data [1] ; |
| 776 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 777 | checksum ^= psds->write_data [k] ; |
| 778 | checksum &= 0x7F ; |
| 779 | |
| 780 | psds->write_data [SDS_BLOCK_SIZE - 2] = checksum ; |
| 781 | psds->write_data [SDS_BLOCK_SIZE - 1] = 0xF7 ; |
| 782 | |
| 783 | if ((k = psf_fwrite (psds->write_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 784 | psf_log_printf (psf, "*** Warning : psf_fwrite (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 785 | |
| 786 | psds->write_block ++ ; |
| 787 | psds->write_count = 0 ; |
| 788 | |
| 789 | if (psds->write_block > psds->total_blocks) |
| 790 | psds->total_blocks = psds->write_block ; |
| 791 | psds->frames = psds->total_blocks * psds->samplesperblock ; |
| 792 | |
| 793 | return 1 ; |
| 794 | } /* sds_2byte_write */ |
| 795 | |
| 796 | static int |
| 797 | sds_3byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 798 | { unsigned char *ucptr, checksum ; |
| 799 | unsigned int sample ; |
| 800 | int k ; |
| 801 | |
| 802 | psds->write_data [0] = 0xF0 ; |
| 803 | psds->write_data [1] = 0x7E ; |
| 804 | psds->write_data [2] = 0 ; /* Channel number */ |
| 805 | psds->write_data [3] = 2 ; |
| 806 | psds->write_data [4] = psds->write_block & 0x7F ; /* Packet number */ |
| 807 | |
| 808 | ucptr = psds->write_data + 5 ; |
| 809 | for (k = 0 ; k < 120 ; k += 3) |
| 810 | { sample = psds->write_samples [k / 3] ; |
| 811 | sample += 0x80000000 ; |
| 812 | ucptr [k] = (sample >> 25) & 0x7F ; |
| 813 | ucptr [k + 1] = (sample >> 18) & 0x7F ; |
| 814 | ucptr [k + 2] = (sample >> 11) & 0x7F ; |
| 815 | } ; |
| 816 | |
| 817 | checksum = psds->write_data [1] ; |
| 818 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 819 | checksum ^= psds->write_data [k] ; |
| 820 | checksum &= 0x7F ; |
| 821 | |
| 822 | psds->write_data [SDS_BLOCK_SIZE - 2] = checksum ; |
| 823 | psds->write_data [SDS_BLOCK_SIZE - 1] = 0xF7 ; |
| 824 | |
| 825 | if ((k = psf_fwrite (psds->write_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 826 | psf_log_printf (psf, "*** Warning : psf_fwrite (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 827 | |
| 828 | psds->write_block ++ ; |
| 829 | psds->write_count = 0 ; |
| 830 | |
| 831 | if (psds->write_block > psds->total_blocks) |
| 832 | psds->total_blocks = psds->write_block ; |
| 833 | psds->frames = psds->total_blocks * psds->samplesperblock ; |
| 834 | |
| 835 | return 1 ; |
| 836 | } /* sds_3byte_write */ |
| 837 | |
| 838 | static int |
| 839 | sds_4byte_write (SF_PRIVATE *psf, SDS_PRIVATE *psds) |
| 840 | { unsigned char *ucptr, checksum ; |
| 841 | unsigned int sample ; |
| 842 | int k ; |
| 843 | |
| 844 | psds->write_data [0] = 0xF0 ; |
| 845 | psds->write_data [1] = 0x7E ; |
| 846 | psds->write_data [2] = 0 ; /* Channel number */ |
| 847 | psds->write_data [3] = 2 ; |
| 848 | psds->write_data [4] = psds->write_block & 0x7F ; /* Packet number */ |
| 849 | |
| 850 | ucptr = psds->write_data + 5 ; |
| 851 | for (k = 0 ; k < 120 ; k += 4) |
| 852 | { sample = psds->write_samples [k / 4] ; |
| 853 | sample += 0x80000000 ; |
| 854 | ucptr [k] = (sample >> 25) & 0x7F ; |
| 855 | ucptr [k + 1] = (sample >> 18) & 0x7F ; |
| 856 | ucptr [k + 2] = (sample >> 11) & 0x7F ; |
| 857 | ucptr [k + 3] = (sample >> 4) & 0x7F ; |
| 858 | } ; |
| 859 | |
| 860 | checksum = psds->write_data [1] ; |
| 861 | for (k = 2 ; k <= SDS_BLOCK_SIZE - 3 ; k ++) |
| 862 | checksum ^= psds->write_data [k] ; |
| 863 | checksum &= 0x7F ; |
| 864 | |
| 865 | psds->write_data [SDS_BLOCK_SIZE - 2] = checksum ; |
| 866 | psds->write_data [SDS_BLOCK_SIZE - 1] = 0xF7 ; |
| 867 | |
| 868 | if ((k = psf_fwrite (psds->write_data, 1, SDS_BLOCK_SIZE, psf)) != SDS_BLOCK_SIZE) |
| 869 | psf_log_printf (psf, "*** Warning : psf_fwrite (%d != %d).\n", k, SDS_BLOCK_SIZE) ; |
| 870 | |
| 871 | psds->write_block ++ ; |
| 872 | psds->write_count = 0 ; |
| 873 | |
| 874 | if (psds->write_block > psds->total_blocks) |
| 875 | psds->total_blocks = psds->write_block ; |
| 876 | psds->frames = psds->total_blocks * psds->samplesperblock ; |
| 877 | |
| 878 | return 1 ; |
| 879 | } /* sds_4byte_write */ |
| 880 | |
| 881 | static sf_count_t |
| 882 | sds_write_s (SF_PRIVATE *psf, const short *ptr, sf_count_t len) |
| 883 | { SDS_PRIVATE *psds ; |
| 884 | int *iptr ; |
| 885 | int k, bufferlen, writecount, count ; |
| 886 | sf_count_t total = 0 ; |
| 887 | |
| 888 | if (psf->codec_data == NULL) |
| 889 | return 0 ; |
| 890 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 891 | psds->total_written += len ; |
| 892 | |
| 893 | iptr = psf->u.ibuf ; |
| 894 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 895 | while (len > 0) |
| 896 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 897 | for (k = 0 ; k < writecount ; k++) |
| 898 | iptr [k] = ptr [total + k] << 16 ; |
| 899 | count = sds_write (psf, psds, iptr, writecount) ; |
| 900 | total += count ; |
| 901 | len -= writecount ; |
| 902 | } ; |
| 903 | |
| 904 | return total ; |
| 905 | } /* sds_write_s */ |
| 906 | |
| 907 | static sf_count_t |
| 908 | sds_write_i (SF_PRIVATE *psf, const int *ptr, sf_count_t len) |
| 909 | { SDS_PRIVATE *psds ; |
| 910 | int total ; |
| 911 | |
| 912 | if (psf->codec_data == NULL) |
| 913 | return 0 ; |
| 914 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 915 | psds->total_written += len ; |
| 916 | |
| 917 | total = sds_write (psf, psds, ptr, len) ; |
| 918 | |
| 919 | return total ; |
| 920 | } /* sds_write_i */ |
| 921 | |
| 922 | static sf_count_t |
| 923 | sds_write_f (SF_PRIVATE *psf, const float *ptr, sf_count_t len) |
| 924 | { SDS_PRIVATE *psds ; |
| 925 | int *iptr ; |
| 926 | int k, bufferlen, writecount, count ; |
| 927 | sf_count_t total = 0 ; |
| 928 | float normfact ; |
| 929 | |
| 930 | if (psf->codec_data == NULL) |
| 931 | return 0 ; |
| 932 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 933 | psds->total_written += len ; |
| 934 | |
| 935 | if (psf->norm_float == SF_TRUE) |
| 936 | normfact = 1.0 * 0x80000000 ; |
| 937 | else |
| 938 | normfact = 1.0 * (1 << psds->bitwidth) ; |
| 939 | |
| 940 | iptr = psf->u.ibuf ; |
| 941 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 942 | while (len > 0) |
| 943 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 944 | for (k = 0 ; k < writecount ; k++) |
| 945 | iptr [k] = normfact * ptr [total + k] ; |
| 946 | count = sds_write (psf, psds, iptr, writecount) ; |
| 947 | total += count ; |
| 948 | len -= writecount ; |
| 949 | } ; |
| 950 | |
| 951 | return total ; |
| 952 | } /* sds_write_f */ |
| 953 | |
| 954 | static sf_count_t |
| 955 | sds_write_d (SF_PRIVATE *psf, const double *ptr, sf_count_t len) |
| 956 | { SDS_PRIVATE *psds ; |
| 957 | int *iptr ; |
| 958 | int k, bufferlen, writecount, count ; |
| 959 | sf_count_t total = 0 ; |
| 960 | double normfact ; |
| 961 | |
| 962 | if (psf->codec_data == NULL) |
| 963 | return 0 ; |
| 964 | psds = (SDS_PRIVATE*) psf->codec_data ; |
| 965 | psds->total_written += len ; |
| 966 | |
| 967 | if (psf->norm_double == SF_TRUE) |
| 968 | normfact = 1.0 * 0x80000000 ; |
| 969 | else |
| 970 | normfact = 1.0 * (1 << psds->bitwidth) ; |
| 971 | |
| 972 | iptr = psf->u.ibuf ; |
| 973 | bufferlen = ARRAY_LEN (psf->u.ibuf) ; |
| 974 | while (len > 0) |
| 975 | { writecount = (len >= bufferlen) ? bufferlen : len ; |
| 976 | for (k = 0 ; k < writecount ; k++) |
| 977 | iptr [k] = normfact * ptr [total + k] ; |
| 978 | count = sds_write (psf, psds, iptr, writecount) ; |
| 979 | total += count ; |
| 980 | len -= writecount ; |
| 981 | } ; |
| 982 | |
| 983 | return total ; |
| 984 | } /* sds_write_d */ |
| 985 | |
| 986 | static int |
| 987 | sds_write (SF_PRIVATE *psf, SDS_PRIVATE *psds, const int *ptr, int len) |
| 988 | { int count, total = 0 ; |
| 989 | |
| 990 | while (total < len) |
| 991 | { count = psds->samplesperblock - psds->write_count ; |
| 992 | if (count > len - total) |
| 993 | count = len - total ; |
| 994 | |
| 995 | memcpy (&(psds->write_samples [psds->write_count]), &(ptr [total]), count * sizeof (int)) ; |
| 996 | total += count ; |
| 997 | psds->write_count += count ; |
| 998 | |
| 999 | if (psds->write_count >= psds->samplesperblock) |
| 1000 | psds->writer (psf, psds) ; |
| 1001 | } ; |
| 1002 | |
| 1003 | return total ; |
| 1004 | } /* sds_write */ |
| 1005 | |