src/flac/main.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (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 <ctype.h>
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #if !defined _MSC_VER && !defined __MINGW32__
  25 /* unlink is in stdio.h in VC++ */
  26 #include <unistd.h> /* for unlink() */
  27 #else
  28 #define strcasecmp stricmp
  29 #endif
  30 #include "FLAC/all.h"
  31 #include "analyze.h"
  32 #include "decode.h"
  33 #include "encode.h"
  34 #include "file.h"
  35
  36 static int short_usage(const char *message, ...);
  37 static int long_usage(const char *message, ...);
  38 static int encode_file(const char *infilename, const char *forced_outfilename, FLAC__bool is_last_file);
  39 static int decode_file(const char *infilename, const char *forced_outfilename);
  40
  41 FLAC__bool verify = false, verbose = true, lax = false, test_only = false, analyze = false, use_ogg = false;
  42 FLAC__bool do_mid_side = true, loose_mid_side = false, do_exhaustive_model_search = false, do_escape_coding = false, do_qlp_coeff_prec_search = false;
  43 FLAC__bool force_to_stdout = false, force_raw_format = false, delete_input = false, sector_align = false;
  44 const char *cmdline_forced_outfilename = 0, *output_prefix = 0;
  45 analysis_options aopts = { false, false };
  46 unsigned padding = 0;
  47 unsigned max_lpc_order = 8;
  48 unsigned qlp_coeff_precision = 0;
  49 FLAC__uint64 skip = 0;
  50 int format_is_big_endian = -1, format_is_unsigned_samples = false;
  51 int format_channels = -1, format_bps = -1, format_sample_rate = -1;
  52 int blocksize = -1, min_residual_partition_order = -1, max_residual_partition_order = -1, rice_parameter_search_dist = -1;
  53 char requested_seek_points[50000]; /* @@@ bad MAGIC NUMBER */
  54 int num_requested_seek_points = -1; /* -1 => no -S options were given, 0 => -S- was given */
  55 FLAC__int32 align_reservoir_0[588], align_reservoir_1[588]; /* for carrying over samples from --sector-align */
  56 FLAC__int32 *align_reservoir[2] = { align_reservoir_0, align_reservoir_1 };
  57 unsigned align_reservoir_samples = 0; /* 0 .. 587 */
  58
  59 static const char *flac_suffix = ".flac", *ogg_suffix = ".ogg";
  60
  61 int main(int argc, char *argv[])
  62 {
  63         int i, retval = 0;
  64         FLAC__bool mode_decode = false;
  65
  66         if(argc <= 1)
  67                 return short_usage(0);
  68
  69         /* get the options */
  70         for(i = 1; i < argc; i++) {
  71                 if(argv[i][0] != '-' || argv[i][1] == 0)
  72                         break;
  73                 if(0 == strcmp(argv[i], "-H") || 0 == strcmp(argv[i], "--help"))
  74                         return long_usage(0);
  75                 else if(0 == strcmp(argv[i], "-d"))
  76                         mode_decode = true;
  77                 else if(0 == strcmp(argv[i], "-a")) {
  78                         mode_decode = true;
  79                         analyze = true;
  80                 }
  81                 else if(0 == strcmp(argv[i], "-t")) {
  82                         mode_decode = true;
  83                         test_only = true;
  84                 }
  85                 else if(0 == strcmp(argv[i], "-c"))
  86                         force_to_stdout = true;
  87                 else if(0 == strcmp(argv[i], "-s"))
  88                         verbose = false;
  89                 else if(0 == strcmp(argv[i], "-s-"))
  90                         verbose = true;
  91                 else if(0 == strcmp(argv[i], "-S")) {
  92                         if(++i >= argc)
  93                                 return long_usage("ERROR: must specify a value with -S\n");
  94                         if(num_requested_seek_points < 0)
  95                                 num_requested_seek_points = 0;
  96                         num_requested_seek_points++;
  97                         strcat(requested_seek_points, argv[i]);
  98                         strcat(requested_seek_points, "<");
  99                 }
 100                 else if(0 == strcmp(argv[i], "-S-")) {
 101                         num_requested_seek_points = 0;
 102                         requested_seek_points[0] = '\0';
 103                 }
 104                 else if(0 == strcmp(argv[i], "--delete-input-file"))
 105                         delete_input = true;
 106                 else if(0 == strcmp(argv[i], "--delete-input-file-"))
 107                         delete_input = false;
 108                 else if(0 == strcmp(argv[i], "--output-prefix")) {
 109                         if(++i >= argc)
 110                                 return long_usage("ERROR: must specify a value with --output-prefix\n");
 111                         output_prefix = argv[i];
 112                 }
 113                 else if(0 == strcmp(argv[i], "--sector-align"))
 114                         sector_align = true;
 115                 else if(0 == strcmp(argv[i], "--sector-align-"))
 116                         sector_align = false;
 117                 else if(0 == strcmp(argv[i], "--skip")) {
 118                         if(++i >= argc)
 119                                 return long_usage("ERROR: must specify a value with --skip\n");
 120                         skip = (FLAC__uint64)atoi(argv[i]); /* @@@ takes a pretty damn big file to overflow atoi() here, but it could happen */
 121                 }
 122                 else if(0 == strcmp(argv[i], "--lax"))
 123                         lax = true;
 124                 else if(0 == strcmp(argv[i], "--lax-"))
 125                         lax = false;
 126 #ifdef FLAC__HAS_OGG
 127                 else if(0 == strcmp(argv[i], "--ogg"))
 128                         use_ogg = true;
 129                 else if(0 == strcmp(argv[i], "--ogg-"))
 130                         use_ogg = false;
 131 #endif
 132                 else if(0 == strcmp(argv[i], "-b")) {
 133                         if(++i >= argc)
 134                                 return long_usage("ERROR: must specify a value with -b\n");
 135                         blocksize = atoi(argv[i]);
 136                 }
 137                 else if(0 == strcmp(argv[i], "-e"))
 138                         do_exhaustive_model_search = true;
 139                 else if(0 == strcmp(argv[i], "-e-"))
 140                         do_exhaustive_model_search = false;
 141                 else if(0 == strcmp(argv[i], "-E"))
 142                         do_escape_coding = true;
 143                 else if(0 == strcmp(argv[i], "-E-"))
 144                         do_escape_coding = false;
 145                 else if(0 == strcmp(argv[i], "-l")) {
 146                         if(++i >= argc)
 147                                 return long_usage("ERROR: must specify a value with -l\n");
 148                         max_lpc_order = atoi(argv[i]);
 149                 }
 150                 else if(0 == strcmp(argv[i], "-m")) {
 151                         do_mid_side = true;
 152                         loose_mid_side = false;
 153                 }
 154                 else if(0 == strcmp(argv[i], "-m-"))
 155                         do_mid_side = loose_mid_side = false;
 156                 else if(0 == strcmp(argv[i], "-M"))
 157                         loose_mid_side = do_mid_side = true;
 158                 else if(0 == strcmp(argv[i], "-M-"))
 159                         loose_mid_side = do_mid_side = false;
 160                 else if(0 == strcmp(argv[i], "-o")) {
 161                         if(++i >= argc)
 162                                 return long_usage("ERROR: must specify a value with -o\n");
 163                         cmdline_forced_outfilename = argv[i];
 164                 }
 165                 else if(0 == strcmp(argv[i], "-p"))
 166                         do_qlp_coeff_prec_search = true;
 167                 else if(0 == strcmp(argv[i], "-p-"))
 168                         do_qlp_coeff_prec_search = false;
 169                 else if(0 == strcmp(argv[i], "-P")) {
 170                         if(++i >= argc)
 171                                 return long_usage("ERROR: must specify a value with -P\n");
 172                         padding = atoi(argv[i]);
 173                 }
 174                 else if(0 == strcmp(argv[i], "-q")) {
 175                         if(++i >= argc)
 176                                 return long_usage("ERROR: must specify a value with -q\n");
 177                         qlp_coeff_precision = atoi(argv[i]);
 178                 }
 179                 else if(0 == strcmp(argv[i], "-r")) {
 180                         char *p;
 181                         if(++i >= argc)
 182                                 return long_usage("ERROR: must specify a value with -r\n");
 183                         p = strchr(argv[i], ',');
 184                         if(0 == p) {
 185                                 min_residual_partition_order = 0;
 186                                 max_residual_partition_order = atoi(argv[i]);
 187                         }
 188                         else {
 189                                 min_residual_partition_order = atoi(argv[i]);
 190                                 max_residual_partition_order = atoi(++p);
 191                         }
 192                 }
 193                 else if(0 == strcmp(argv[i], "-R")) {
 194                         if(++i >= argc)
 195                                 return long_usage("ERROR: must specify a value with -R\n");
 196                         rice_parameter_search_dist = atoi(argv[i]);
 197                 }
 198                 else if(0 == strcmp(argv[i], "-V"))
 199                         verify = true;
 200                 else if(0 == strcmp(argv[i], "-V-"))
 201                         verify = false;
 202                 else if(0 == strcmp(argv[i], "-fb"))
 203                         format_is_big_endian = true;
 204                 else if(0 == strcmp(argv[i], "-fl"))
 205                         format_is_big_endian = false;
 206                 else if(0 == strcmp(argv[i], "-fc")) {
 207                         if(++i >= argc)
 208                                 return long_usage("ERROR: must specify a value with -fc\n");
 209                         format_channels = atoi(argv[i]);
 210                 }
 211                 else if(0 == strcmp(argv[i], "-fp")) {
 212                         if(++i >= argc)
 213                                 return long_usage("ERROR: must specify a value with -fp\n");
 214                         format_bps = atoi(argv[i]);
 215                 }
 216                 else if(0 == strcmp(argv[i], "-fs")) {
 217                         if(++i >= argc)
 218                                 return long_usage("ERROR: must specify a value with -fs\n");
 219                         format_sample_rate = atoi(argv[i]);
 220                 }
 221                 else if(0 == strcmp(argv[i], "-fu"))
 222                         format_is_unsigned_samples = true;
 223                 else if(0 == strcmp(argv[i], "-fr"))
 224                         force_raw_format = true;
 225                 else if(0 == strcmp(argv[i], "--a-rgp"))
 226                         aopts.do_residual_gnuplot = true;
 227                 else if(0 == strcmp(argv[i], "--a-rgp-"))
 228                         aopts.do_residual_gnuplot = false;
 229                 else if(0 == strcmp(argv[i], "--a-rtext"))
 230                         aopts.do_residual_text = true;
 231                 else if(0 == strcmp(argv[i], "--a-rtext-"))
 232                         aopts.do_residual_text = false;
 233                 else if(0 == strcmp(argv[i], "-0") || 0 == strcmp(argv[i], "--fast")) {
 234                         do_exhaustive_model_search = false;
 235                         do_escape_coding = false;
 236                         do_mid_side = false;
 237                         loose_mid_side = false;
 238                         qlp_coeff_precision = 0;
 239                         min_residual_partition_order = max_residual_partition_order = 2;
 240                         rice_parameter_search_dist = 0;
 241                         max_lpc_order = 0;
 242                 }
 243                 else if(0 == strcmp(argv[i], "-1")) {
 244                         do_exhaustive_model_search = false;
 245                         do_escape_coding = false;
 246                         do_mid_side = true;
 247                         loose_mid_side = true;
 248                         qlp_coeff_precision = 0;
 249                         min_residual_partition_order = max_residual_partition_order = 2;
 250                         rice_parameter_search_dist = 0;
 251                         max_lpc_order = 0;
 252                 }
 253                 else if(0 == strcmp(argv[i], "-2")) {
 254                         do_exhaustive_model_search = false;
 255                         do_escape_coding = false;
 256                         do_mid_side = true;
 257                         loose_mid_side = false;
 258                         qlp_coeff_precision = 0;
 259                         min_residual_partition_order = 0;
 260                         max_residual_partition_order = 3;
 261                         rice_parameter_search_dist = 0;
 262                         max_lpc_order = 0;
 263                 }
 264                 else if(0 == strcmp(argv[i], "-3")) {
 265                         do_exhaustive_model_search = false;
 266                         do_escape_coding = false;
 267                         do_mid_side = false;
 268                         loose_mid_side = false;
 269                         qlp_coeff_precision = 0;
 270                         min_residual_partition_order = max_residual_partition_order = 3;
 271                         rice_parameter_search_dist = 0;
 272                         max_lpc_order = 6;
 273                 }
 274                 else if(0 == strcmp(argv[i], "-4")) {
 275                         do_exhaustive_model_search = false;
 276                         do_escape_coding = false;
 277                         do_mid_side = true;
 278                         loose_mid_side = true;
 279                         qlp_coeff_precision = 0;
 280                         min_residual_partition_order = max_residual_partition_order = 3;
 281                         rice_parameter_search_dist = 0;
 282                         max_lpc_order = 8;
 283                 }
 284                 else if(0 == strcmp(argv[i], "-5")) {
 285                         do_exhaustive_model_search = false;
 286                         do_escape_coding = false;
 287                         do_mid_side = true;
 288                         loose_mid_side = false;
 289                         qlp_coeff_precision = 0;
 290                         min_residual_partition_order = max_residual_partition_order = 3;
 291                         rice_parameter_search_dist = 0;
 292                         max_lpc_order = 8;
 293                 }
 294                 else if(0 == strcmp(argv[i], "-6")) {
 295                         do_exhaustive_model_search = false;
 296                         do_escape_coding = false;
 297                         do_mid_side = true;
 298                         loose_mid_side = false;
 299                         qlp_coeff_precision = 0;
 300                         min_residual_partition_order = 0;
 301                         max_residual_partition_order = 4;
 302                         rice_parameter_search_dist = 0;
 303                         max_lpc_order = 8;
 304                 }
 305                 else if(0 == strcmp(argv[i], "-7")) {
 306                         do_exhaustive_model_search = true;
 307                         do_escape_coding = false;
 308                         do_mid_side = true;
 309                         loose_mid_side = false;
 310                         qlp_coeff_precision = 0;
 311                         min_residual_partition_order = 0;
 312                         max_residual_partition_order = 6;
 313                         rice_parameter_search_dist = 0;
 314                         max_lpc_order = 8;
 315                 }
 316                 else if(0 == strcmp(argv[i], "-8") || 0 == strcmp(argv[i], "--best")) {
 317                         do_exhaustive_model_search = true;
 318                         do_escape_coding = false;
 319                         do_mid_side = true;
 320                         loose_mid_side = false;
 321                         qlp_coeff_precision = 0;
 322                         min_residual_partition_order = 0;
 323                         max_residual_partition_order = 6;
 324                         rice_parameter_search_dist = 0;
 325                         max_lpc_order = 12;
 326                 }
 327                 else if(0 == strcmp(argv[i], "--super-secret-impractical-compression-level")) {
 328                         do_exhaustive_model_search = true;
 329                         do_escape_coding = true;
 330                         do_mid_side = true;
 331                         loose_mid_side = false;
 332                         do_qlp_coeff_prec_search = true;
 333                         min_residual_partition_order = 0;
 334                         max_residual_partition_order = 16;
 335                         rice_parameter_search_dist = 0;
 336                         max_lpc_order = 32;
 337                 }
 338                 else if(isdigit((int)(argv[i][1]))) {
 339                         return long_usage("ERROR: compression level '%s' is reserved\n", argv[i]);
 340                 }
 341                 else {
 342                         return long_usage("ERROR: invalid option '%s'\n", argv[i]);
 343                 }
 344         }
 345
 346         /* tweak options; validate the values */
 347         if(!mode_decode) {
 348                 if(blocksize < 0) {
 349                         if(max_lpc_order == 0)
 350                                 blocksize = 1152;
 351                         else
 352                                 blocksize = 4608;
 353                 }
 354                 if(max_residual_partition_order < 0) {
 355                         if(blocksize <= 1152)
 356                                 max_residual_partition_order = 2;
 357                         else if(blocksize <= 2304)
 358                                 max_residual_partition_order = 3;
 359                         else if(blocksize <= 4608)
 360                                 max_residual_partition_order = 3;
 361                         else
 362                                 max_residual_partition_order = 4;
 363                         min_residual_partition_order = max_residual_partition_order;
 364                 }
 365                 if(rice_parameter_search_dist < 0) {
 366                         rice_parameter_search_dist = 0;
 367                 }
 368         }
 369         else {
 370                 if(test_only) {
 371                         if(skip > 0)
 372                                 return long_usage("ERROR: --skip is not allowed in test mode\n");
 373                 }
 374         }
 375
 376         FLAC__ASSERT(blocksize >= 0 || mode_decode);
 377
 378         if(format_channels >= 0) {
 379                 if(format_channels == 0 || (unsigned)format_channels > FLAC__MAX_CHANNELS)
 380                         return long_usage("ERROR: invalid number of channels '%u', must be > 0 and <= %u\n", format_channels, FLAC__MAX_CHANNELS);
 381         }
 382         if(format_bps >= 0) {
 383                 if(format_bps != 8 && format_bps != 16 && format_bps != 24)
 384                         return long_usage("ERROR: invalid bits per sample '%u' (must be 8/16/24)\n", format_bps);
 385         }
 386         if(format_sample_rate >= 0) {
 387                 if(format_sample_rate == 0 || (unsigned)format_sample_rate > FLAC__MAX_SAMPLE_RATE)
 388                         return long_usage("ERROR: invalid sample rate '%u', must be > 0 and <= %u\n", format_sample_rate, FLAC__MAX_SAMPLE_RATE);
 389         }
 390         if(!mode_decode && ((unsigned)blocksize < FLAC__MIN_BLOCK_SIZE || (unsigned)blocksize > FLAC__MAX_BLOCK_SIZE)) {
 391                 return long_usage("ERROR: invalid blocksize '%u', must be >= %u and <= %u\n", (unsigned)blocksize, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 392         }
 393         if(qlp_coeff_precision > 0 && qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION) {
 394                 return long_usage("ERROR: invalid value for -q '%u', must be 0 or >= %u\n", qlp_coeff_precision, FLAC__MIN_QLP_COEFF_PRECISION);
 395         }
 396
 397         if(sector_align) {
 398                 if(mode_decode)
 399                         return long_usage("ERROR: --sector-align only allowed for encoding\n");
 400                 else if(skip > 0)
 401                         return long_usage("ERROR: --sector-align not allowed with --skip\n");
 402                 else if(format_channels >= 0 && format_channels != 2)
 403                         return long_usage("ERROR: --sector-align can only be done with stereo input\n");
 404                 else if(format_sample_rate >= 0 && format_sample_rate != 2)
 405                         return long_usage("ERROR: --sector-align can only be done with sample rate of 44100\n");
 406         }
 407         if(argc - i > 1 && cmdline_forced_outfilename) {
 408                 return long_usage("ERROR: -o cannot be used with multiple files\n");
 409         }
 410         if(cmdline_forced_outfilename && output_prefix) {
 411                 return long_usage("ERROR: --output-prefix conflicts with -o\n");
 412         }
 413
 414         if(verbose) {
 415                 fprintf(stderr, "\n");
 416                 fprintf(stderr, "flac %s, Copyright (C) 2000,2001,2002 Josh Coalson\n", FLAC__VERSION_STRING);
 417                 fprintf(stderr, "flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are\n");
 418                 fprintf(stderr, "welcome to redistribute it under certain conditions.  Type `flac' for details.\n\n");
 419
 420                 if(!mode_decode) {
 421                         fprintf(stderr,
 422                                 "options:%s%s"
 423 #ifdef FLAC__HAS_OGG
 424                                 "%s"
 425 #endif
 426                                 "%s -P %u -b %u%s -l %u%s%s%s -q %u -r %u,%u -R %u%s\n",
 427                                 delete_input?" --delete-input-file":"", sector_align?" --sector-align":"",
 428 #ifdef FLAC__HAS_OGG
 429                                 use_ogg?" --ogg":"",
 430 #endif
 431                                 lax?" --lax":"",
 432                                 padding, (unsigned)blocksize, loose_mid_side?" -M":do_mid_side?" -m":"", max_lpc_order,
 433                                 do_exhaustive_model_search?" -e":"", do_escape_coding?" -E":"", do_qlp_coeff_prec_search?" -p":"",
 434                                 qlp_coeff_precision,
 435                                 (unsigned)min_residual_partition_order, (unsigned)max_residual_partition_order, (unsigned)rice_parameter_search_dist,
 436                                 verify? " -V":""
 437                         );
 438                 }
 439         }
 440
 441         if(mode_decode) {
 442                 FLAC__bool first = true;
 443
 444                 if(i == argc) {
 445                         retval = decode_file("-", 0);
 446                 }
 447                 else {
 448                         if(i + 1 != argc)
 449                                 cmdline_forced_outfilename = 0;
 450                         for(retval = 0; i < argc && retval == 0; i++) {
 451                                 if(0 == strcmp(argv[i], "-") && !first)
 452                                         continue;
 453                                 retval = decode_file(argv[i], 0);
 454                                 first = false;
 455                         }
 456                 }
 457         }
 458         else { /* encode */
 459                 FLAC__bool first = true;
 460
 461                 if(i == argc) {
 462                         retval = encode_file("-", 0, true);
 463                 }
 464                 else {
 465                         if(i + 1 != argc)
 466                                 cmdline_forced_outfilename = 0;
 467                         for(retval = 0; i < argc && retval == 0; i++) {
 468                                 if(0 == strcmp(argv[i], "-") && !first)
 469                                         continue;
 470                                 retval = encode_file(argv[i], 0, i == (argc-1));
 471                                 first = false;
 472                         }
 473                 }
 474         }
 475
 476         return retval;
 477 }
 478
 479 static void usage_header()
 480 {
 481         fprintf(stderr, "===============================================================================\n");
 482         fprintf(stderr, "flac - Command-line FLAC encoder/decoder version %s\n", FLAC__VERSION_STRING);
 483         fprintf(stderr, "Copyright (C) 2000,2001,2002  Josh Coalson\n");
 484         fprintf(stderr, "\n");
 485         fprintf(stderr, "This program is free software; you can redistribute it and/or\n");
 486         fprintf(stderr, "modify it under the terms of the GNU General Public License\n");
 487         fprintf(stderr, "as published by the Free Software Foundation; either version 2\n");
 488         fprintf(stderr, "of the License, or (at your option) any later version.\n");
 489         fprintf(stderr, "\n");
 490         fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
 491         fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
 492         fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n");
 493         fprintf(stderr, "GNU General Public License for more details.\n");
 494         fprintf(stderr, "\n");
 495         fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
 496         fprintf(stderr, "along with this program; if not, write to the Free Software\n");
 497         fprintf(stderr, "Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.\n");
 498         fprintf(stderr, "===============================================================================\n");
 499 }
 500
 501 int short_usage(const char *message, ...)
 502 {
 503         va_list args;
 504
 505         if(message) {
 506                 va_start(args, message);
 507
 508                 (void) vfprintf(stderr, message, args);
 509
 510                 va_end(args);
 511
 512         }
 513         usage_header();
 514         fprintf(stderr, "\n");
 515         fprintf(stderr, "This is the short help; for full help use 'flac --help'\n");
 516         fprintf(stderr, "\n");
 517         fprintf(stderr, "To encode:\n");
 518         fprintf(stderr, "  flac [-#] [infile [...]]\n");
 519         fprintf(stderr, "\n");
 520         fprintf(stderr, "  -# is -0 (fastest compression) to -8 (highest compression); -5 is the default\n");
 521         fprintf(stderr, "\n");
 522         fprintf(stderr, "To decode:\n");
 523         fprintf(stderr, "  flac -d [infile [...]]\n");
 524         fprintf(stderr, "\n");
 525         fprintf(stderr, "To test:\n");
 526         fprintf(stderr, "  flac -t [infile [...]]\n");
 527
 528         return message? 1 : 0;
 529 }
 530
 531 int long_usage(const char *message, ...)
 532 {
 533         FILE *out = (message? stderr : stdout);
 534         va_list args;
 535
 536         if(message) {
 537                 va_start(args, message);
 538
 539                 (void) vfprintf(stderr, message, args);
 540
 541                 va_end(args);
 542
 543         }
 544         usage_header();
 545         fprintf(out, "Usage:\n");
 546         fprintf(out, "  flac [options] [infile [...]]\n");
 547         fprintf(out, "\n");
 548         fprintf(out, "For encoding:\n");
 549         fprintf(out, "  the input file(s) may be a PCM RIFF WAVE file or raw samples\n");
 550         fprintf(out, "  the output file(s) will be in FLAC format\n");
 551         fprintf(out, "For decoding, the reverse is true\n");
 552         fprintf(out, "\n");
 553         fprintf(out, "A single 'infile' may be - for stdin.  No 'infile' implies stdin.  Use of\n");
 554         fprintf(out, "stdin implies -c (write to stdout).  Normally you should use:\n");
 555         fprintf(out, "   flac [options] -o outfilename  or  flac -d [options] -o outfilename\n");
 556         fprintf(out, "instead of:\n");
 557         fprintf(out, "   flac [options] > outfilename   or  flac -d [options] > outfilename\n");
 558         fprintf(out, "since the former allows flac to seek backwards to write the STREAMINFO or\n");
 559         fprintf(out, "RIFF WAVE header contents when necessary.\n");
 560         fprintf(out, "\n");
 561         fprintf(out, "flac checks for the presence of a RIFF WAVE header to decide whether or not\n");
 562         fprintf(out, "to treat an input file as WAVE format or raw samples.  If any infile is raw\n");
 563         fprintf(out, "you must specify the format options {-fb|fl} -fc -fp and -fs, which will\n");
 564         fprintf(out, "apply to all raw files.  You can force WAVE files to be treated as a raw files\n");
 565         fprintf(out, "using -fr.\n");
 566         fprintf(out, "\n");
 567         fprintf(out, "generic options:\n");
 568         fprintf(out, "  -d : decode (default behavior is encode)\n");
 569         fprintf(out, "  -t : test (same as -d except no decoded file is written)\n");
 570         fprintf(out, "  -a : analyze (same as -d except an analysis file is written)\n");
 571         fprintf(out, "  -c : write output to stdout\n");
 572         fprintf(out, "  -s : silent (do not write runtime encode/decode statistics)\n");
 573         fprintf(out, "  -o filename : force the output file name (usually flac just changes the\n");
 574         fprintf(out, "                extension)\n");
 575         fprintf(out, "  --output-prefix string : prefix each output file name with the given string.\n");
 576         fprintf(out, "    This can be useful for encoding/decoding files to a different directory.\n");
 577         fprintf(out, "    Make sure if your string is a path name that it ends with a '/' slash.\n");
 578         fprintf(out, "  --delete-input-file : deletes the input file after a successful encode/decode\n");
 579         fprintf(out, "  --skip samples : can be used both for encoding and decoding\n");
 580         fprintf(out, "analyze options:\n");
 581         fprintf(out, "  --a-rtext : include residual signal in text output\n");
 582         fprintf(out, "  --a-rgp : generate gnuplot files of residual distribution of each subframe\n");
 583         fprintf(out, "encoding options:\n");
 584 #ifdef FLAC__HAS_OGG
 585         fprintf(out, "  --ogg : output Ogg-FLAC stream instead of native FLAC\n");
 586 #endif
 587         fprintf(out, "  --lax : allow encoder to generate non-Subset files\n");
 588         fprintf(out, "  --sector-align : align encoding of multiple files on sector boundaries\n");
 589         fprintf(out, "  -S { # | X | #x } : include a point or points in a SEEKTABLE\n");
 590         fprintf(out, "       #  : a specific sample number for a seek point\n");
 591         fprintf(out, "       X  : a placeholder point (always goes at the end of the SEEKTABLE)\n");
 592         fprintf(out, "       #x : # evenly spaced seekpoints, the first being at sample 0\n");
 593         fprintf(out, "     You may use many -S options; the resulting SEEKTABLE will be the unique-\n");
 594         fprintf(out, "           ified union of all such values.\n");
 595         fprintf(out, "     With no -S options, flac defaults to '-S 100x'.  Use -S- for no SEEKTABLE.\n");
 596         fprintf(out, "     Note: -S #x will not work if the encoder can't determine the input size\n");
 597         fprintf(out, "           before starting.\n");
 598         fprintf(out, "     Note: if you use -S # and # is >= samples in the input, there will be\n");
 599         fprintf(out, "           either no seek point entered (if the input size is determinable\n");
 600         fprintf(out, "           before encoding starts) or a placeholder point (if input size is not\n");
 601         fprintf(out, "           determinable)\n");
 602         fprintf(out, "  -P # : write a PADDING block of # bytes (goes after SEEKTABLE)\n");
 603         fprintf(out, "         (0 => no PADDING block, default is -P 0)\n");
 604         fprintf(out, "  -b # : specify blocksize in samples; default is 1152 for -l 0, else 4608;\n");
 605         fprintf(out, "         must be 192/576/1152/2304/4608/256/512/1024/2048/4096/8192/16384/32768\n");
 606         fprintf(out, "         (unless --lax is used)\n");
 607         fprintf(out, "  -m   : try mid-side coding for each frame (stereo input only)\n");
 608         fprintf(out, "  -M   : adaptive mid-side coding for all frames (stereo input only)\n");
 609         fprintf(out, "  -0 .. -8 : fastest compression .. highest compression, default is -5\n");
 610         fprintf(out, "             these are synonyms for other options:\n");
 611         fprintf(out, "  -0   : synonymous with -l 0 -b 1152 -r 2,2\n");
 612         fprintf(out, "  -1   : synonymous with -l 0 -b 1152 -M -r 2,2\n");
 613         fprintf(out, "  -2   : synonymous with -l 0 -b 1152 -m -r 3\n");
 614         fprintf(out, "  -3   : synonymous with -l 6 -b 4608 -r 3,3\n");
 615         fprintf(out, "  -4   : synonymous with -l 8 -b 4608 -M -r 3,3\n");
 616         fprintf(out, "  -5   : synonymous with -l 8 -b 4608 -m -r 3,3\n");
 617         fprintf(out, "  -6   : synonymous with -l 8 -b 4608 -m -r 4\n");
 618         fprintf(out, "  -7   : synonymous with -l 8 -b 4608 -m -e -r 6\n");
 619         fprintf(out, "  -8   : synonymous with -l 12 -b 4608 -m -e -r 6\n");
 620         fprintf(out, "  --fast, --best : synonymous with -0 and -8 respectively\n");
 621         fprintf(out, "  -e   : do exhaustive model search (expensive!)\n");
 622         fprintf(out, "  -E   : include escape coding in the entropy coder\n");
 623         fprintf(out, "  -l # : specify max LPC order; 0 => use only fixed predictors\n");
 624         fprintf(out, "  -p   : do exhaustive search of LP coefficient quantization (expensive!);\n");
 625         fprintf(out, "         overrides -q, does nothing if using -l 0\n");
 626         fprintf(out, "  -q # : specify precision in bits of quantized linear-predictor coefficients;\n");
 627         fprintf(out, "         0 => let encoder decide (min is %u, default is -q 0)\n", FLAC__MIN_QLP_COEFF_PRECISION);
 628         fprintf(out, "  -r [#,]# : [min,]max residual partition order (# is 0..16; min defaults to 0;\n");
 629         fprintf(out, "         default is -r 0; above 4 doesn't usually help much)\n");
 630         fprintf(out, "  -R # : Rice parameter search distance (# is 0..32; above 2 doesn't help much)\n");
 631         fprintf(out, "  -V   : verify a correct encoding by decoding the output in parallel and\n");
 632         fprintf(out, "         comparing to the original\n");
 633         fprintf(out, "  -S-, -m-, -M-, -e-, -E-, -p-, -V-, --delete-input-file-,%s --lax-, --sector-align-\n",
 634 #ifdef FLAC__HAS_OGG
 635                 " --ogg-,"
 636 #else
 637                 ""
 638 #endif
 639         );
 640         fprintf(out, "  can all be used to turn off a particular option\n");
 641         fprintf(out, "format options:\n");
 642         fprintf(out, "  -fb | -fl : big-endian | little-endian byte order\n");
 643         fprintf(out, "  -fc channels\n");
 644         fprintf(out, "  -fp bits_per_sample\n");
 645         fprintf(out, "  -fs sample_rate : in Hz\n");
 646         fprintf(out, "  -fu : unsigned samples (default is signed)\n");
 647         fprintf(out, "  -fr : force input to be treated as raw samples\n");
 648
 649         return message? 1 : 0;
 650 }
 651
 652 int encode_file(const char *infilename, const char *forced_outfilename, FLAC__bool is_last_file)
 653 {
 654         FILE *encode_infile;
 655         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 656         char *p;
 657         FLAC__byte lookahead[12];
 658         unsigned lookahead_length = 0;
 659         FLAC__bool treat_as_wave = false;
 660         int retval;
 661         long infilesize;
 662         encode_options_t common_options;
 663
 664         if(0 == strcmp(infilename, "-")) {
 665                 infilesize = -1;
 666                 encode_infile = file__get_binary_stdin();
 667         }
 668         else {
 669                 infilesize = flac__file_get_filesize(infilename);
 670                 if(0 == (encode_infile = fopen(infilename, "rb"))) {
 671                         fprintf(stderr, "ERROR: can't open input file %s\n", infilename);
 672                         return 1;
 673                 }
 674         }
 675
 676         if(!force_raw_format) {
 677                 /* first set format based on name */
 678                 if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".wav"))
 679                         treat_as_wave = true;
 680                 else
 681                         treat_as_wave = false;
 682
 683                 /* attempt to guess the file type based on the first 12 bytes */
 684                 if((lookahead_length = fread(lookahead, 1, 12, encode_infile)) < 12) {
 685                         if(treat_as_wave)
 686                                 fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 687                         treat_as_wave = false;
 688                 }
 689                 else {
 690                         if(strncmp(lookahead, "RIFF", 4) || strncmp(lookahead+8, "WAVE", 4)) {
 691                                 if(treat_as_wave)
 692                                         fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 693                                 treat_as_wave = false;
 694                         }
 695                         else
 696                                 treat_as_wave = true;
 697                 }
 698         }
 699
 700         if(sector_align && !treat_as_wave && infilesize < 0) {
 701                 fprintf(stderr, "ERROR: can't --sector-align when the input size is unknown\n");
 702                 return 1;
 703         }
 704
 705         if(!treat_as_wave) {
 706                 if(format_is_big_endian < 0 || format_channels < 0 || format_bps < 0 || format_sample_rate < 0)
 707                         return long_usage("ERROR: for encoding a raw file you must specify { -fb or -fl }, -fc, -fp, and -fs\n");
 708         }
 709
 710         if(encode_infile == stdin || force_to_stdout)
 711                 strcpy(outfilename, "-");
 712         else {
 713                 const char *suffix = (use_ogg? ogg_suffix : flac_suffix);
 714                 strcpy(outfilename, output_prefix? output_prefix : "");
 715                 strcat(outfilename, infilename);
 716                 if(0 == (p = strrchr(outfilename, '.')))
 717                         strcat(outfilename, suffix);
 718                 else {
 719                         if(0 == strcmp(p, suffix)) {
 720                                 strcpy(p, "_new");
 721                                 strcat(p, suffix);
 722                         }
 723                         else
 724                                 strcpy(p, suffix);
 725                 }
 726         }
 727         if(0 == forced_outfilename)
 728                 forced_outfilename = outfilename;
 729         if(0 != cmdline_forced_outfilename)
 730                 forced_outfilename = cmdline_forced_outfilename;
 731
 732         common_options.verbose = verbose;
 733         common_options.skip = skip;
 734         common_options.verify = verify;
 735 #ifdef FLAC__HAS_OGG
 736         common_options.use_ogg = use_ogg;
 737 #endif
 738         common_options.lax = lax;
 739         common_options.do_mid_side = do_mid_side;
 740         common_options.loose_mid_side = loose_mid_side;
 741         common_options.do_exhaustive_model_search = do_exhaustive_model_search;
 742         common_options.do_escape_coding = do_escape_coding;
 743         common_options.do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 744         common_options.min_residual_partition_order = min_residual_partition_order;
 745         common_options.max_residual_partition_order = max_residual_partition_order;
 746         common_options.rice_parameter_search_dist = rice_parameter_search_dist;
 747         common_options.max_lpc_order = max_lpc_order;
 748         common_options.blocksize = (unsigned)blocksize;
 749         common_options.qlp_coeff_precision = qlp_coeff_precision;
 750         common_options.padding = padding;
 751         common_options.requested_seek_points = requested_seek_points;
 752         common_options.num_requested_seek_points = num_requested_seek_points;
 753
 754         if(treat_as_wave) {
 755                 wav_encode_options_t options;
 756
 757                 options.common = common_options;
 758                 options.is_last_file = is_last_file;
 759                 options.align_reservoir = align_reservoir;
 760                 options.align_reservoir_samples = &align_reservoir_samples;
 761                 options.sector_align = sector_align;
 762
 763                 retval = flac__encode_wav(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, options);
 764         }
 765         else {
 766                 raw_encode_options_t options;
 767
 768                 options.common = common_options;
 769                 options.is_big_endian = format_is_big_endian;
 770                 options.is_unsigned_samples = format_is_unsigned_samples;
 771                 options.channels = format_channels;
 772                 options.bps = format_bps;
 773                 options.sample_rate = format_sample_rate;
 774
 775                 retval = flac__encode_raw(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, options);
 776         }
 777
 778         if(retval == 0 && strcmp(infilename, "-")) {
 779                 if(strcmp(forced_outfilename, "-"))
 780                         flac__file_copy_metadata(infilename, forced_outfilename);
 781                 if(delete_input)
 782                         unlink(infilename);
 783         }
 784
 785         return 0;
 786 }
 787
 788 int decode_file(const char *infilename, const char *forced_outfilename)
 789 {
 790         static const char *suffixes[] = { ".wav", ".raw", ".ana" };
 791         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 792         char *p;
 793         int retval;
 794         FLAC__bool treat_as_ogg = false;
 795         decode_options_t common_options;
 796
 797         if(!test_only && !analyze) {
 798                 if(force_raw_format && format_is_big_endian < 0)
 799                         return long_usage("ERROR: for decoding to a raw file you must specify -fb or -fl\n");
 800         }
 801
 802         if(0 == strcmp(infilename, "-") || force_to_stdout)
 803                 strcpy(outfilename, "-");
 804         else {
 805                 const char *suffix = suffixes[analyze? 2 : force_raw_format? 1 : 0];
 806                 strcpy(outfilename, output_prefix? output_prefix : "");
 807                 strcat(outfilename, infilename);
 808                 if(0 == (p = strrchr(outfilename, '.')))
 809                         strcat(outfilename, suffix);
 810                 else {
 811                         if(0 == strcmp(p, suffix)) {
 812                                 strcpy(p, "_new");
 813                                 strcat(p, suffix);
 814                         }
 815                         else
 816                                 strcpy(p, suffix);
 817                 }
 818         }
 819         if(0 == forced_outfilename)
 820                 forced_outfilename = outfilename;
 821         if(0 != cmdline_forced_outfilename)
 822                 forced_outfilename = cmdline_forced_outfilename;
 823
 824         if(use_ogg)
 825                 treat_as_ogg = true;
 826         else if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".ogg"))
 827                 treat_as_ogg = true;
 828         else
 829                 treat_as_ogg = false;
 830
 831 #ifndef FLAC__HAS_OGG
 832         if(treat_as_ogg) {
 833                 fprintf(stderr, "%s: Ogg support has not been built into this copy of flac\n", infilename);
 834                 return 1;
 835         }
 836 #endif
 837
 838         common_options.verbose = verbose;
 839 #ifdef FLAC__HAS_OGG
 840         common_options.is_ogg = treat_as_ogg;
 841 #endif
 842         common_options.skip = skip;
 843
 844         if(!force_raw_format) {
 845                 wav_decode_options_t options;
 846
 847                 options.common = common_options;
 848
 849                 retval = flac__decode_wav(infilename, test_only? 0 : forced_outfilename, analyze, aopts, options);
 850         }
 851         else {
 852                 raw_decode_options_t options;
 853
 854                 options.common = common_options;
 855                 options.is_big_endian = format_is_big_endian;
 856                 options.is_unsigned_samples = format_is_unsigned_samples;
 857
 858                 retval = flac__decode_raw(infilename, test_only? 0 : forced_outfilename, analyze, aopts, options);
 859         }
 860
 861         if(retval == 0 && strcmp(infilename, "-")) {
 862                 if(strcmp(forced_outfilename, "-"))
 863                         flac__file_copy_metadata(infilename, forced_outfilename);
 864                 if(delete_input)
 865                         unlink(infilename);
 866         }
 867
 868         return 0;
 869 }