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 General Public License as published by |
| 6 | ** the Free Software Foundation; either version 2 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 General Public License for more details. |
| 13 | ** |
| 14 | ** You should have received a copy of the GNU 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 | |
| 24 | #if HAVE_UNISTD_H |
| 25 | #include <unistd.h> |
| 26 | #endif |
| 27 | |
| 28 | #if (HAVE_DECL_S_IRGRP == 0) |
| 29 | #include <sf_unistd.h> |
| 30 | #endif |
| 31 | |
| 32 | #include <string.h> |
| 33 | #include <math.h> |
| 34 | #include <time.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <sys/stat.h> |
| 37 | |
| 38 | #include <sndfile.h> |
| 39 | |
| 40 | #ifndef M_PI |
| 41 | #define M_PI 3.14159265358979323846264338 |
| 42 | #endif |
| 43 | |
| 44 | /* |
| 45 | ** Neat solution to the Win32/OS2 binary file flage requirement. |
| 46 | ** If O_BINARY isn't already defined by the inclusion of the system |
| 47 | ** headers, set it to zero. |
| 48 | */ |
| 49 | #ifndef O_BINARY |
| 50 | #define O_BINARY 0 |
| 51 | #endif |
| 52 | |
| 53 | #define WRITE_FLAGS (O_WRONLY | O_CREAT | O_TRUNC | O_BINARY) |
| 54 | #define READ_FLAGS (O_RDONLY | O_BINARY) |
| 55 | |
| 56 | #if (defined (WIN32) || defined (_WIN32) || defined (__OS2__)) |
| 57 | #define WRITE_PERMS 0777 |
| 58 | #else |
| 59 | #define WRITE_PERMS (S_IRUSR | S_IWUSR | S_IRGRP) |
| 60 | #endif |
| 61 | |
| 62 | #define BUFFER_SIZE (1<<18) |
| 63 | #define BLOCK_COUNT (30) |
| 64 | #define TEST_DURATION (5) /* 5 Seconds. */ |
| 65 | |
| 66 | typedef struct |
| 67 | { double write_rate ; |
| 68 | double read_rate ; |
| 69 | } PERF_STATS ; |
| 70 | |
| 71 | static void *data = NULL ; |
| 72 | |
| 73 | static void calc_raw_performance (PERF_STATS *stats) ; |
| 74 | |
| 75 | static void calc_short_performance (int format, double read_rate, double write_rate) ; |
| 76 | static void calc_int_performance (int format, double read_rate, double write_rate) ; |
| 77 | static void calc_float_performance (int format, double read_rate, double write_rate) ; |
| 78 | |
| 79 | |
| 80 | static int cpu_is_big_endian (void) ; |
| 81 | |
| 82 | static const char* get_subtype_str (int subtype) ; |
| 83 | |
| 84 | int |
| 85 | main (int argc, char *argv []) |
| 86 | { PERF_STATS stats ; |
| 87 | char buffer [256] = "Benchmarking " ; |
| 88 | int format_major ; |
| 89 | |
| 90 | if (! (data = malloc (BUFFER_SIZE * sizeof (double)))) |
| 91 | { perror ("Error : malloc failed") ; |
| 92 | exit (1) ; |
| 93 | } ; |
| 94 | |
| 95 | sf_command (NULL, SFC_GET_LIB_VERSION, buffer + strlen (buffer), sizeof (buffer) - strlen (buffer)) ; |
| 96 | |
| 97 | puts (buffer) ; |
| 98 | memset (buffer, '-', strlen (buffer)) ; |
| 99 | puts (buffer) ; |
| 100 | printf ("Each test takes a little over %d seconds.\n\n", TEST_DURATION) ; |
| 101 | |
| 102 | calc_raw_performance (&stats) ; |
| 103 | |
| 104 | if (argc < 2 || strcmp ("--native-only", argv [1]) == 0) |
| 105 | { puts ("\nNative endian I/O :") ; |
| 106 | format_major = cpu_is_big_endian () ? SF_FORMAT_AIFF : SF_FORMAT_WAV ; |
| 107 | |
| 108 | calc_short_performance (format_major | SF_FORMAT_PCM_16, stats.read_rate, stats.write_rate) ; |
| 109 | calc_int_performance (format_major | SF_FORMAT_PCM_24, stats.read_rate, stats.write_rate) ; |
| 110 | calc_int_performance (format_major | SF_FORMAT_PCM_32, stats.read_rate, stats.write_rate) ; |
| 111 | calc_float_performance (format_major | SF_FORMAT_PCM_16, stats.read_rate, stats.write_rate) ; |
| 112 | calc_float_performance (format_major | SF_FORMAT_PCM_24, stats.read_rate, stats.write_rate) ; |
| 113 | calc_float_performance (format_major | SF_FORMAT_PCM_32, stats.read_rate, stats.write_rate) ; |
| 114 | calc_float_performance (format_major | SF_FORMAT_FLOAT , stats.read_rate, stats.write_rate) ; |
| 115 | } ; |
| 116 | |
| 117 | if (argc < 2 || strcmp ("--swap-only", argv [1]) == 0) |
| 118 | { puts ("\nEndian swapped I/O :") ; |
| 119 | format_major = cpu_is_big_endian () ? SF_FORMAT_WAV : SF_FORMAT_AIFF ; |
| 120 | |
| 121 | calc_short_performance (format_major | SF_FORMAT_PCM_16, stats.read_rate, stats.write_rate) ; |
| 122 | calc_int_performance (format_major | SF_FORMAT_PCM_24, stats.read_rate, stats.write_rate) ; |
| 123 | calc_int_performance (format_major | SF_FORMAT_PCM_32, stats.read_rate, stats.write_rate) ; |
| 124 | calc_float_performance (format_major | SF_FORMAT_PCM_16, stats.read_rate, stats.write_rate) ; |
| 125 | calc_float_performance (format_major | SF_FORMAT_PCM_24, stats.read_rate, stats.write_rate) ; |
| 126 | calc_float_performance (format_major | SF_FORMAT_PCM_32, stats.read_rate, stats.write_rate) ; |
| 127 | calc_float_performance (format_major | SF_FORMAT_FLOAT , stats.read_rate, stats.write_rate) ; |
| 128 | } ; |
| 129 | |
| 130 | puts ("") ; |
| 131 | |
| 132 | free (data) ; |
| 133 | |
| 134 | return 0 ; |
| 135 | } /* main */ |
| 136 | |
| 137 | /*============================================================================== |
| 138 | */ |
| 139 | |
| 140 | static void |
| 141 | calc_raw_performance (PERF_STATS *stats) |
| 142 | { clock_t start_clock, clock_time ; |
| 143 | int fd, k, byte_count, retval, op_count ; |
| 144 | const char *filename ; |
| 145 | |
| 146 | filename = "benchmark.dat" ; |
| 147 | |
| 148 | byte_count = BUFFER_SIZE * sizeof (short) ; |
| 149 | |
| 150 | /* Collect write stats */ |
| 151 | printf (" Raw write PCM_16 : ") ; |
| 152 | fflush (stdout) ; |
| 153 | |
| 154 | clock_time = 0 ; |
| 155 | op_count = 0 ; |
| 156 | start_clock = clock () ; |
| 157 | |
| 158 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 159 | { if ((fd = open (filename, WRITE_FLAGS, WRITE_PERMS)) < 0) |
| 160 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 161 | perror ("") ; |
| 162 | exit (1) ; |
| 163 | } ; |
| 164 | |
| 165 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 166 | { if ((retval = write (fd, data, byte_count)) != byte_count) |
| 167 | { printf ("Error : write returned %d (should have been %d)\n", retval, byte_count) ; |
| 168 | exit (1) ; |
| 169 | } ; |
| 170 | } ; |
| 171 | |
| 172 | close (fd) ; |
| 173 | |
| 174 | clock_time = clock () - start_clock ; |
| 175 | op_count ++ ; |
| 176 | } ; |
| 177 | |
| 178 | stats->write_rate = (1.0 * BUFFER_SIZE) * BLOCK_COUNT * op_count ; |
| 179 | stats->write_rate *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 180 | printf ("%10.0f samples per sec\n", stats->write_rate) ; |
| 181 | |
| 182 | /* Collect read stats */ |
| 183 | printf (" Raw read PCM_16 : ") ; |
| 184 | fflush (stdout) ; |
| 185 | |
| 186 | clock_time = 0 ; |
| 187 | op_count = 0 ; |
| 188 | start_clock = clock () ; |
| 189 | |
| 190 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 191 | { if ((fd = open (filename, READ_FLAGS)) < 0) |
| 192 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 193 | perror ("") ; |
| 194 | exit (1) ; |
| 195 | } ; |
| 196 | |
| 197 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 198 | { if ((retval = read (fd, data, byte_count)) != byte_count) |
| 199 | { printf ("Error : write returned %d (should have been %d)\n", retval, byte_count) ; |
| 200 | exit (1) ; |
| 201 | } ; |
| 202 | } ; |
| 203 | |
| 204 | close (fd) ; |
| 205 | |
| 206 | clock_time = clock () - start_clock ; |
| 207 | op_count ++ ; |
| 208 | } ; |
| 209 | |
| 210 | stats->read_rate = (1.0 * BUFFER_SIZE) * BLOCK_COUNT * op_count ; |
| 211 | stats->read_rate *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 212 | printf ("%10.0f samples per sec\n", stats->read_rate) ; |
| 213 | |
| 214 | unlink (filename) ; |
| 215 | } /* calc_raw_performance */ |
| 216 | |
| 217 | /*------------------------------------------------------------------------------ |
| 218 | */ |
| 219 | |
| 220 | static void |
| 221 | calc_short_performance (int format, double read_rate, double write_rate) |
| 222 | { SNDFILE *file ; |
| 223 | SF_INFO sfinfo ; |
| 224 | clock_t start_clock, clock_time ; |
| 225 | double performance ; |
| 226 | int k, item_count, retval, op_count ; |
| 227 | const char* subtype ; |
| 228 | short *short_data ; |
| 229 | const char *filename ; |
| 230 | |
| 231 | filename = "benchmark.dat" ; |
| 232 | subtype = get_subtype_str (format & SF_FORMAT_SUBMASK) ; |
| 233 | |
| 234 | short_data = data ; |
| 235 | item_count = BUFFER_SIZE ; |
| 236 | for (k = 0 ; k < item_count ; k++) |
| 237 | short_data [k] = 32700.0 * sin (2 * M_PI * k / 32000.0) ; |
| 238 | |
| 239 | /* Collect write stats */ |
| 240 | printf (" Write %-5s to %s : ", "short", subtype) ; |
| 241 | fflush (stdout) ; |
| 242 | |
| 243 | sfinfo.channels = 1 ; |
| 244 | sfinfo.format = format ; |
| 245 | sfinfo.frames = 1 ; |
| 246 | sfinfo.samplerate = 32000 ; |
| 247 | |
| 248 | clock_time = 0 ; |
| 249 | op_count = 0 ; |
| 250 | start_clock = clock () ; |
| 251 | |
| 252 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 253 | { if (! (file = sf_open (filename, SFM_WRITE, &sfinfo))) |
| 254 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 255 | perror ("") ; |
| 256 | exit (1) ; |
| 257 | } ; |
| 258 | |
| 259 | /* Turn off the addition of a PEAK chunk. */ |
| 260 | sf_command (file, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ; |
| 261 | |
| 262 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 263 | { if ((retval = sf_write_short (file, short_data, item_count)) != item_count) |
| 264 | { printf ("Error : sf_write_short returned %d (should have been %d)\n", retval, item_count) ; |
| 265 | exit (1) ; |
| 266 | } ; |
| 267 | } ; |
| 268 | |
| 269 | sf_close (file) ; |
| 270 | |
| 271 | clock_time = clock () - start_clock ; |
| 272 | op_count ++ ; |
| 273 | } ; |
| 274 | |
| 275 | performance = (1.0 * BUFFER_SIZE) * BLOCK_COUNT * op_count ; |
| 276 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 277 | printf ("%6.2f%% of raw write\n", 100.0 * performance / write_rate) ; |
| 278 | |
| 279 | /* Collect read stats */ |
| 280 | printf (" Read %-5s from %s : ", "short", subtype) ; |
| 281 | fflush (stdout) ; |
| 282 | |
| 283 | clock_time = 0 ; |
| 284 | op_count = 0 ; |
| 285 | start_clock = clock () ; |
| 286 | |
| 287 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 288 | { if (! (file = sf_open (filename, SFM_READ, &sfinfo))) |
| 289 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 290 | perror ("") ; |
| 291 | exit (1) ; |
| 292 | } ; |
| 293 | |
| 294 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 295 | { if ((retval = sf_read_short (file, short_data, item_count)) != item_count) |
| 296 | { printf ("Error : write returned %d (should have been %d)\n", retval, item_count) ; |
| 297 | exit (1) ; |
| 298 | } ; |
| 299 | } ; |
| 300 | |
| 301 | sf_close (file) ; |
| 302 | |
| 303 | clock_time = clock () - start_clock ; |
| 304 | op_count ++ ; |
| 305 | } ; |
| 306 | |
| 307 | performance = (1.0 * item_count) * BLOCK_COUNT * op_count ; |
| 308 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 309 | printf ("%6.2f%% of raw read\n", 100.0 * performance / read_rate) ; |
| 310 | |
| 311 | unlink (filename) ; |
| 312 | |
| 313 | } /* calc_short_performance */ |
| 314 | static void |
| 315 | calc_int_performance (int format, double read_rate, double write_rate) |
| 316 | { SNDFILE *file ; |
| 317 | SF_INFO sfinfo ; |
| 318 | clock_t start_clock, clock_time ; |
| 319 | double performance ; |
| 320 | int k, item_count, retval, op_count ; |
| 321 | const char* subtype ; |
| 322 | int *int_data ; |
| 323 | const char *filename ; |
| 324 | |
| 325 | filename = "benchmark.dat" ; |
| 326 | subtype = get_subtype_str (format & SF_FORMAT_SUBMASK) ; |
| 327 | |
| 328 | int_data = data ; |
| 329 | item_count = BUFFER_SIZE ; |
| 330 | for (k = 0 ; k < item_count ; k++) |
| 331 | int_data [k] = 32700.0 * (1<<16) * sin (2 * M_PI * k / 32000.0) ; |
| 332 | |
| 333 | /* Collect write stats */ |
| 334 | printf (" Write %-5s to %s : ", "int", subtype) ; |
| 335 | fflush (stdout) ; |
| 336 | |
| 337 | sfinfo.channels = 1 ; |
| 338 | sfinfo.format = format ; |
| 339 | sfinfo.frames = 1 ; |
| 340 | sfinfo.samplerate = 32000 ; |
| 341 | |
| 342 | clock_time = 0 ; |
| 343 | op_count = 0 ; |
| 344 | start_clock = clock () ; |
| 345 | |
| 346 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 347 | { if (! (file = sf_open (filename, SFM_WRITE, &sfinfo))) |
| 348 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 349 | perror ("") ; |
| 350 | exit (1) ; |
| 351 | } ; |
| 352 | |
| 353 | /* Turn off the addition of a PEAK chunk. */ |
| 354 | sf_command (file, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ; |
| 355 | |
| 356 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 357 | { if ((retval = sf_write_int (file, int_data, item_count)) != item_count) |
| 358 | { printf ("Error : sf_write_short returned %d (should have been %d)\n", retval, item_count) ; |
| 359 | exit (1) ; |
| 360 | } ; |
| 361 | } ; |
| 362 | |
| 363 | sf_close (file) ; |
| 364 | |
| 365 | clock_time = clock () - start_clock ; |
| 366 | op_count ++ ; |
| 367 | } ; |
| 368 | |
| 369 | performance = (1.0 * BUFFER_SIZE) * BLOCK_COUNT * op_count ; |
| 370 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 371 | printf ("%6.2f%% of raw write\n", 100.0 * performance / write_rate) ; |
| 372 | |
| 373 | /* Collect read stats */ |
| 374 | printf (" Read %-5s from %s : ", "int", subtype) ; |
| 375 | fflush (stdout) ; |
| 376 | |
| 377 | clock_time = 0 ; |
| 378 | op_count = 0 ; |
| 379 | start_clock = clock () ; |
| 380 | |
| 381 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 382 | { if (! (file = sf_open (filename, SFM_READ, &sfinfo))) |
| 383 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 384 | perror ("") ; |
| 385 | exit (1) ; |
| 386 | } ; |
| 387 | |
| 388 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 389 | { if ((retval = sf_read_int (file, int_data, item_count)) != item_count) |
| 390 | { printf ("Error : write returned %d (should have been %d)\n", retval, item_count) ; |
| 391 | exit (1) ; |
| 392 | } ; |
| 393 | } ; |
| 394 | |
| 395 | sf_close (file) ; |
| 396 | |
| 397 | clock_time = clock () - start_clock ; |
| 398 | op_count ++ ; |
| 399 | } ; |
| 400 | |
| 401 | performance = (1.0 * item_count) * BLOCK_COUNT * op_count ; |
| 402 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 403 | printf ("%6.2f%% of raw read\n", 100.0 * performance / read_rate) ; |
| 404 | |
| 405 | unlink (filename) ; |
| 406 | |
| 407 | } /* calc_int_performance */ |
| 408 | static void |
| 409 | calc_float_performance (int format, double read_rate, double write_rate) |
| 410 | { SNDFILE *file ; |
| 411 | SF_INFO sfinfo ; |
| 412 | clock_t start_clock, clock_time ; |
| 413 | double performance ; |
| 414 | int k, item_count, retval, op_count ; |
| 415 | const char* subtype ; |
| 416 | float *float_data ; |
| 417 | const char *filename ; |
| 418 | |
| 419 | filename = "benchmark.dat" ; |
| 420 | subtype = get_subtype_str (format & SF_FORMAT_SUBMASK) ; |
| 421 | |
| 422 | float_data = data ; |
| 423 | item_count = BUFFER_SIZE ; |
| 424 | for (k = 0 ; k < item_count ; k++) |
| 425 | float_data [k] = 1.0 * sin (2 * M_PI * k / 32000.0) ; |
| 426 | |
| 427 | /* Collect write stats */ |
| 428 | printf (" Write %-5s to %s : ", "float", subtype) ; |
| 429 | fflush (stdout) ; |
| 430 | |
| 431 | sfinfo.channels = 1 ; |
| 432 | sfinfo.format = format ; |
| 433 | sfinfo.frames = 1 ; |
| 434 | sfinfo.samplerate = 32000 ; |
| 435 | |
| 436 | clock_time = 0 ; |
| 437 | op_count = 0 ; |
| 438 | start_clock = clock () ; |
| 439 | |
| 440 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 441 | { if (! (file = sf_open (filename, SFM_WRITE, &sfinfo))) |
| 442 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 443 | perror ("") ; |
| 444 | exit (1) ; |
| 445 | } ; |
| 446 | |
| 447 | /* Turn off the addition of a PEAK chunk. */ |
| 448 | sf_command (file, SFC_SET_ADD_PEAK_CHUNK, NULL, SF_FALSE) ; |
| 449 | |
| 450 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 451 | { if ((retval = sf_write_float (file, float_data, item_count)) != item_count) |
| 452 | { printf ("Error : sf_write_short returned %d (should have been %d)\n", retval, item_count) ; |
| 453 | exit (1) ; |
| 454 | } ; |
| 455 | } ; |
| 456 | |
| 457 | sf_close (file) ; |
| 458 | |
| 459 | clock_time = clock () - start_clock ; |
| 460 | op_count ++ ; |
| 461 | } ; |
| 462 | |
| 463 | performance = (1.0 * BUFFER_SIZE) * BLOCK_COUNT * op_count ; |
| 464 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 465 | printf ("%6.2f%% of raw write\n", 100.0 * performance / write_rate) ; |
| 466 | |
| 467 | /* Collect read stats */ |
| 468 | printf (" Read %-5s from %s : ", "float", subtype) ; |
| 469 | fflush (stdout) ; |
| 470 | |
| 471 | clock_time = 0 ; |
| 472 | op_count = 0 ; |
| 473 | start_clock = clock () ; |
| 474 | |
| 475 | while (clock_time < (CLOCKS_PER_SEC * TEST_DURATION)) |
| 476 | { if (! (file = sf_open (filename, SFM_READ, &sfinfo))) |
| 477 | { printf ("Error : not able to open file : %s\n", filename) ; |
| 478 | perror ("") ; |
| 479 | exit (1) ; |
| 480 | } ; |
| 481 | |
| 482 | for (k = 0 ; k < BLOCK_COUNT ; k++) |
| 483 | { if ((retval = sf_read_float (file, float_data, item_count)) != item_count) |
| 484 | { printf ("Error : write returned %d (should have been %d)\n", retval, item_count) ; |
| 485 | exit (1) ; |
| 486 | } ; |
| 487 | } ; |
| 488 | |
| 489 | sf_close (file) ; |
| 490 | |
| 491 | clock_time = clock () - start_clock ; |
| 492 | op_count ++ ; |
| 493 | } ; |
| 494 | |
| 495 | performance = (1.0 * item_count) * BLOCK_COUNT * op_count ; |
| 496 | performance *= (1.0 * CLOCKS_PER_SEC) / clock_time ; |
| 497 | printf ("%6.2f%% of raw read\n", 100.0 * performance / read_rate) ; |
| 498 | |
| 499 | unlink (filename) ; |
| 500 | |
| 501 | } /* calc_float_performance */ |
| 502 | |
| 503 | |
| 504 | /*============================================================================== |
| 505 | */ |
| 506 | |
| 507 | static int |
| 508 | cpu_is_big_endian (void) |
| 509 | { unsigned char *cptr ; |
| 510 | int endtest ; |
| 511 | |
| 512 | endtest = 0x12345678 ; |
| 513 | |
| 514 | cptr = (unsigned char*) (&endtest) ; |
| 515 | |
| 516 | if (cptr [0] == 0x12 && cptr [1] == 0x34 && cptr [3] == 0x78) |
| 517 | return SF_TRUE ; |
| 518 | |
| 519 | return SF_FALSE ; |
| 520 | } /* cpu_is_big_endian */ |
| 521 | |
| 522 | static const char* |
| 523 | get_subtype_str (int subtype) |
| 524 | { switch (subtype) |
| 525 | { case SF_FORMAT_PCM_16 : |
| 526 | return "PCM_16" ; |
| 527 | |
| 528 | case SF_FORMAT_PCM_24 : |
| 529 | return "PCM_24" ; |
| 530 | |
| 531 | case SF_FORMAT_PCM_32 : |
| 532 | return "PCM_32" ; |
| 533 | |
| 534 | case SF_FORMAT_FLOAT : |
| 535 | return "FLOAT " ; |
| 536 | |
| 537 | case SF_FORMAT_DOUBLE : |
| 538 | return "DOUBLE" ; |
| 539 | |
| 540 | default : break ; |
| 541 | } ; |
| 542 | |
| 543 | return "UNKNOWN" ; |
| 544 | } /* get_subtype_str */ |
| 545 | |