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 int padding = -1;
  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                         if(padding < 0)
 174                                 return long_usage("ERROR: argument to -P must be >= 0\n");
 175                 }
 176                 else if(0 == strcmp(argv[i], "-P-"))
 177                         padding = -1;
 178                 else if(0 == strcmp(argv[i], "-q")) {
 179                         if(++i >= argc)
 180                                 return long_usage("ERROR: must specify a value with -q\n");
 181                         qlp_coeff_precision = atoi(argv[i]);
 182                 }
 183                 else if(0 == strcmp(argv[i], "-r")) {
 184                         char *p;
 185                         if(++i >= argc)
 186                                 return long_usage("ERROR: must specify a value with -r\n");
 187                         p = strchr(argv[i], ',');
 188                         if(0 == p) {
 189                                 min_residual_partition_order = 0;
 190                                 max_residual_partition_order = atoi(argv[i]);
 191                         }
 192                         else {
 193                                 min_residual_partition_order = atoi(argv[i]);
 194                                 max_residual_partition_order = atoi(++p);
 195                         }
 196                 }
 197                 else if(0 == strcmp(argv[i], "-R")) {
 198                         if(++i >= argc)
 199                                 return long_usage("ERROR: must specify a value with -R\n");
 200                         rice_parameter_search_dist = atoi(argv[i]);
 201                 }
 202                 else if(0 == strcmp(argv[i], "-V"))
 203                         verify = true;
 204                 else if(0 == strcmp(argv[i], "-V-"))
 205                         verify = false;
 206                 else if(0 == strcmp(argv[i], "-fb"))
 207                         format_is_big_endian = true;
 208                 else if(0 == strcmp(argv[i], "-fl"))
 209                         format_is_big_endian = false;
 210                 else if(0 == strcmp(argv[i], "-fc")) {
 211                         if(++i >= argc)
 212                                 return long_usage("ERROR: must specify a value with -fc\n");
 213                         format_channels = atoi(argv[i]);
 214                 }
 215                 else if(0 == strcmp(argv[i], "-fp")) {
 216                         if(++i >= argc)
 217                                 return long_usage("ERROR: must specify a value with -fp\n");
 218                         format_bps = atoi(argv[i]);
 219                 }
 220                 else if(0 == strcmp(argv[i], "-fs")) {
 221                         if(++i >= argc)
 222                                 return long_usage("ERROR: must specify a value with -fs\n");
 223                         format_sample_rate = atoi(argv[i]);
 224                 }
 225                 else if(0 == strcmp(argv[i], "-fu"))
 226                         format_is_unsigned_samples = true;
 227                 else if(0 == strcmp(argv[i], "-fr"))
 228                         force_raw_format = true;
 229                 else if(0 == strcmp(argv[i], "--a-rgp"))
 230                         aopts.do_residual_gnuplot = true;
 231                 else if(0 == strcmp(argv[i], "--a-rgp-"))
 232                         aopts.do_residual_gnuplot = false;
 233                 else if(0 == strcmp(argv[i], "--a-rtext"))
 234                         aopts.do_residual_text = true;
 235                 else if(0 == strcmp(argv[i], "--a-rtext-"))
 236                         aopts.do_residual_text = false;
 237                 else if(0 == strcmp(argv[i], "-0") || 0 == strcmp(argv[i], "--fast")) {
 238                         do_exhaustive_model_search = false;
 239                         do_escape_coding = false;
 240                         do_mid_side = false;
 241                         loose_mid_side = false;
 242                         qlp_coeff_precision = 0;
 243                         min_residual_partition_order = max_residual_partition_order = 2;
 244                         rice_parameter_search_dist = 0;
 245                         max_lpc_order = 0;
 246                 }
 247                 else if(0 == strcmp(argv[i], "-1")) {
 248                         do_exhaustive_model_search = false;
 249                         do_escape_coding = false;
 250                         do_mid_side = true;
 251                         loose_mid_side = true;
 252                         qlp_coeff_precision = 0;
 253                         min_residual_partition_order = max_residual_partition_order = 2;
 254                         rice_parameter_search_dist = 0;
 255                         max_lpc_order = 0;
 256                 }
 257                 else if(0 == strcmp(argv[i], "-2")) {
 258                         do_exhaustive_model_search = false;
 259                         do_escape_coding = false;
 260                         do_mid_side = true;
 261                         loose_mid_side = false;
 262                         qlp_coeff_precision = 0;
 263                         min_residual_partition_order = 0;
 264                         max_residual_partition_order = 3;
 265                         rice_parameter_search_dist = 0;
 266                         max_lpc_order = 0;
 267                 }
 268                 else if(0 == strcmp(argv[i], "-3")) {
 269                         do_exhaustive_model_search = false;
 270                         do_escape_coding = false;
 271                         do_mid_side = false;
 272                         loose_mid_side = false;
 273                         qlp_coeff_precision = 0;
 274                         min_residual_partition_order = max_residual_partition_order = 3;
 275                         rice_parameter_search_dist = 0;
 276                         max_lpc_order = 6;
 277                 }
 278                 else if(0 == strcmp(argv[i], "-4")) {
 279                         do_exhaustive_model_search = false;
 280                         do_escape_coding = false;
 281                         do_mid_side = true;
 282                         loose_mid_side = true;
 283                         qlp_coeff_precision = 0;
 284                         min_residual_partition_order = max_residual_partition_order = 3;
 285                         rice_parameter_search_dist = 0;
 286                         max_lpc_order = 8;
 287                 }
 288                 else if(0 == strcmp(argv[i], "-5")) {
 289                         do_exhaustive_model_search = false;
 290                         do_escape_coding = false;
 291                         do_mid_side = true;
 292                         loose_mid_side = false;
 293                         qlp_coeff_precision = 0;
 294                         min_residual_partition_order = max_residual_partition_order = 3;
 295                         rice_parameter_search_dist = 0;
 296                         max_lpc_order = 8;
 297                 }
 298                 else if(0 == strcmp(argv[i], "-6")) {
 299                         do_exhaustive_model_search = false;
 300                         do_escape_coding = false;
 301                         do_mid_side = true;
 302                         loose_mid_side = false;
 303                         qlp_coeff_precision = 0;
 304                         min_residual_partition_order = 0;
 305                         max_residual_partition_order = 4;
 306                         rice_parameter_search_dist = 0;
 307                         max_lpc_order = 8;
 308                 }
 309                 else if(0 == strcmp(argv[i], "-7")) {
 310                         do_exhaustive_model_search = true;
 311                         do_escape_coding = false;
 312                         do_mid_side = true;
 313                         loose_mid_side = false;
 314                         qlp_coeff_precision = 0;
 315                         min_residual_partition_order = 0;
 316                         max_residual_partition_order = 6;
 317                         rice_parameter_search_dist = 0;
 318                         max_lpc_order = 8;
 319                 }
 320                 else if(0 == strcmp(argv[i], "-8") || 0 == strcmp(argv[i], "--best")) {
 321                         do_exhaustive_model_search = true;
 322                         do_escape_coding = false;
 323                         do_mid_side = true;
 324                         loose_mid_side = false;
 325                         qlp_coeff_precision = 0;
 326                         min_residual_partition_order = 0;
 327                         max_residual_partition_order = 6;
 328                         rice_parameter_search_dist = 0;
 329                         max_lpc_order = 12;
 330                 }
 331                 else if(0 == strcmp(argv[i], "--super-secret-impractical-compression-level")) {
 332                         do_exhaustive_model_search = true;
 333                         do_escape_coding = true;
 334                         do_mid_side = true;
 335                         loose_mid_side = false;
 336                         do_qlp_coeff_prec_search = true;
 337                         min_residual_partition_order = 0;
 338                         max_residual_partition_order = 16;
 339                         rice_parameter_search_dist = 0;
 340                         max_lpc_order = 32;
 341                 }
 342                 else if(isdigit((int)(argv[i][1]))) {
 343                         return long_usage("ERROR: compression level '%s' is reserved\n", argv[i]);
 344                 }
 345                 else {
 346                         return long_usage("ERROR: invalid option '%s'\n", argv[i]);
 347                 }
 348         }
 349
 350         /* tweak options; validate the values */
 351         if(!mode_decode) {
 352                 if(blocksize < 0) {
 353                         if(max_lpc_order == 0)
 354                                 blocksize = 1152;
 355                         else
 356                                 blocksize = 4608;
 357                 }
 358                 if(max_residual_partition_order < 0) {
 359                         if(blocksize <= 1152)
 360                                 max_residual_partition_order = 2;
 361                         else if(blocksize <= 2304)
 362                                 max_residual_partition_order = 3;
 363                         else if(blocksize <= 4608)
 364                                 max_residual_partition_order = 3;
 365                         else
 366                                 max_residual_partition_order = 4;
 367                         min_residual_partition_order = max_residual_partition_order;
 368                 }
 369                 if(rice_parameter_search_dist < 0) {
 370                         rice_parameter_search_dist = 0;
 371                 }
 372         }
 373         else {
 374                 if(test_only) {
 375                         if(skip > 0)
 376                                 return long_usage("ERROR: --skip is not allowed in test mode\n");
 377                 }
 378         }
 379
 380         FLAC__ASSERT(blocksize >= 0 || mode_decode);
 381
 382         if(format_channels >= 0) {
 383                 if(format_channels == 0 || (unsigned)format_channels > FLAC__MAX_CHANNELS)
 384                         return long_usage("ERROR: invalid number of channels '%u', must be > 0 and <= %u\n", format_channels, FLAC__MAX_CHANNELS);
 385         }
 386         if(format_bps >= 0) {
 387                 if(format_bps != 8 && format_bps != 16 && format_bps != 24)
 388                         return long_usage("ERROR: invalid bits per sample '%u' (must be 8/16/24)\n", format_bps);
 389         }
 390         if(format_sample_rate >= 0) {
 391                 if(!FLAC__format_is_valid_sample_rate(format_sample_rate))
 392                         return long_usage("ERROR: invalid sample rate '%u', must be > 0 and <= %u\n", format_sample_rate, FLAC__MAX_SAMPLE_RATE);
 393         }
 394         if(!mode_decode && ((unsigned)blocksize < FLAC__MIN_BLOCK_SIZE || (unsigned)blocksize > FLAC__MAX_BLOCK_SIZE)) {
 395                 return long_usage("ERROR: invalid blocksize '%u', must be >= %u and <= %u\n", (unsigned)blocksize, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 396         }
 397         if(qlp_coeff_precision > 0 && qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION) {
 398                 return long_usage("ERROR: invalid value for -q '%u', must be 0 or >= %u\n", qlp_coeff_precision, FLAC__MIN_QLP_COEFF_PRECISION);
 399         }
 400
 401         if(sector_align) {
 402                 if(mode_decode)
 403                         return long_usage("ERROR: --sector-align only allowed for encoding\n");
 404                 else if(skip > 0)
 405                         return long_usage("ERROR: --sector-align not allowed with --skip\n");
 406                 else if(format_channels >= 0 && format_channels != 2)
 407                         return long_usage("ERROR: --sector-align can only be done with stereo input\n");
 408                 else if(format_sample_rate >= 0 && format_sample_rate != 2)
 409                         return long_usage("ERROR: --sector-align can only be done with sample rate of 44100\n");
 410         }
 411         if(argc - i > 1 && cmdline_forced_outfilename) {
 412                 return long_usage("ERROR: -o cannot be used with multiple files\n");
 413         }
 414         if(cmdline_forced_outfilename && output_prefix) {
 415                 return long_usage("ERROR: --output-prefix conflicts with -o\n");
 416         }
 417
 418         if(verbose) {
 419                 fprintf(stderr, "\n");
 420                 fprintf(stderr, "flac %s, Copyright (C) 2000,2001,2002 Josh Coalson\n", FLAC__VERSION_STRING);
 421                 fprintf(stderr, "flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are\n");
 422                 fprintf(stderr, "welcome to redistribute it under certain conditions.  Type `flac' for details.\n\n");
 423
 424                 if(!mode_decode) {
 425                         char padopt[16];
 426                         if(padding < 0)
 427                                 strcpy(padopt, "-");
 428                         else
 429                                 sprintf(padopt, " %d", padding);
 430                         fprintf(stderr,
 431                                 "options:%s%s"
 432 #ifdef FLAC__HAS_OGG
 433                                 "%s"
 434 #endif
 435                                 "%s -P%s -b %u%s -l %u%s%s%s -q %u -r %u,%u -R %u%s\n",
 436                                 delete_input?" --delete-input-file":"", sector_align?" --sector-align":"",
 437 #ifdef FLAC__HAS_OGG
 438                                 use_ogg?" --ogg":"",
 439 #endif
 440                                 lax?" --lax":"",
 441                                 padopt, (unsigned)blocksize, loose_mid_side?" -M":do_mid_side?" -m":"", max_lpc_order,
 442                                 do_exhaustive_model_search?" -e":"", do_escape_coding?" -E":"", do_qlp_coeff_prec_search?" -p":"",
 443                                 qlp_coeff_precision,
 444                                 (unsigned)min_residual_partition_order, (unsigned)max_residual_partition_order, (unsigned)rice_parameter_search_dist,
 445                                 verify? " -V":""
 446                         );
 447                 }
 448         }
 449
 450         if(mode_decode) {
 451                 FLAC__bool first = true;
 452
 453                 if(i == argc) {
 454                         retval = decode_file("-", 0);
 455                 }
 456                 else {
 457                         if(i + 1 != argc)
 458                                 cmdline_forced_outfilename = 0;
 459                         for(retval = 0; i < argc && retval == 0; i++) {
 460                                 if(0 == strcmp(argv[i], "-") && !first)
 461                                         continue;
 462                                 retval = decode_file(argv[i], 0);
 463                                 first = false;
 464                         }
 465                 }
 466         }
 467         else { /* encode */
 468                 FLAC__bool first = true;
 469
 470                 if(i == argc) {
 471                         retval = encode_file("-", 0, true);
 472                 }
 473                 else {
 474                         if(i + 1 != argc)
 475                                 cmdline_forced_outfilename = 0;
 476                         for(retval = 0; i < argc && retval == 0; i++) {
 477                                 if(0 == strcmp(argv[i], "-") && !first)
 478                                         continue;
 479                                 retval = encode_file(argv[i], 0, i == (argc-1));
 480                                 first = false;
 481                         }
 482                 }
 483         }
 484
 485         return retval;
 486 }
 487
 488 static void usage_header()
 489 {
 490         fprintf(stderr, "===============================================================================\n");
 491         fprintf(stderr, "flac - Command-line FLAC encoder/decoder version %s\n", FLAC__VERSION_STRING);
 492         fprintf(stderr, "Copyright (C) 2000,2001,2002  Josh Coalson\n");
 493         fprintf(stderr, "\n");
 494         fprintf(stderr, "This program is free software; you can redistribute it and/or\n");
 495         fprintf(stderr, "modify it under the terms of the GNU General Public License\n");
 496         fprintf(stderr, "as published by the Free Software Foundation; either version 2\n");
 497         fprintf(stderr, "of the License, or (at your option) any later version.\n");
 498         fprintf(stderr, "\n");
 499         fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
 500         fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
 501         fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n");
 502         fprintf(stderr, "GNU General Public License for more details.\n");
 503         fprintf(stderr, "\n");
 504         fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
 505         fprintf(stderr, "along with this program; if not, write to the Free Software\n");
 506         fprintf(stderr, "Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.\n");
 507         fprintf(stderr, "===============================================================================\n");
 508 }
 509
 510 int short_usage(const char *message, ...)
 511 {
 512         va_list args;
 513
 514         if(message) {
 515                 va_start(args, message);
 516
 517                 (void) vfprintf(stderr, message, args);
 518
 519                 va_end(args);
 520
 521         }
 522         usage_header();
 523         fprintf(stderr, "\n");
 524         fprintf(stderr, "This is the short help; for full help use 'flac --help'\n");
 525         fprintf(stderr, "\n");
 526         fprintf(stderr, "To encode:\n");
 527         fprintf(stderr, "  flac [-#] [infile [...]]\n");
 528         fprintf(stderr, "\n");
 529         fprintf(stderr, "  -# is -0 (fastest compression) to -8 (highest compression); -5 is the default\n");
 530         fprintf(stderr, "\n");
 531         fprintf(stderr, "To decode:\n");
 532         fprintf(stderr, "  flac -d [infile [...]]\n");
 533         fprintf(stderr, "\n");
 534         fprintf(stderr, "To test:\n");
 535         fprintf(stderr, "  flac -t [infile [...]]\n");
 536
 537         return message? 1 : 0;
 538 }
 539
 540 int long_usage(const char *message, ...)
 541 {
 542         FILE *out = (message? stderr : stdout);
 543         va_list args;
 544
 545         if(message) {
 546                 va_start(args, message);
 547
 548                 (void) vfprintf(stderr, message, args);
 549
 550                 va_end(args);
 551
 552         }
 553         usage_header();
 554         fprintf(out, "Usage:\n");
 555         fprintf(out, "  flac [options] [infile [...]]\n");
 556         fprintf(out, "\n");
 557         fprintf(out, "For encoding:\n");
 558         fprintf(out, "  the input file(s) may be a PCM RIFF WAVE file or raw samples\n");
 559         fprintf(out, "  the output file(s) will be in FLAC format\n");
 560         fprintf(out, "For decoding, the reverse is true\n");
 561         fprintf(out, "\n");
 562         fprintf(out, "A single 'infile' may be - for stdin.  No 'infile' implies stdin.  Use of\n");
 563         fprintf(out, "stdin implies -c (write to stdout).  Normally you should use:\n");
 564         fprintf(out, "   flac [options] -o outfilename  or  flac -d [options] -o outfilename\n");
 565         fprintf(out, "instead of:\n");
 566         fprintf(out, "   flac [options] > outfilename   or  flac -d [options] > outfilename\n");
 567         fprintf(out, "since the former allows flac to seek backwards to write the STREAMINFO or\n");
 568         fprintf(out, "RIFF WAVE header contents when necessary.\n");
 569         fprintf(out, "\n");
 570         fprintf(out, "flac checks for the presence of a RIFF WAVE header to decide whether or not\n");
 571         fprintf(out, "to treat an input file as WAVE format or raw samples.  If any infile is raw\n");
 572         fprintf(out, "you must specify the format options {-fb|fl} -fc -fp and -fs, which will\n");
 573         fprintf(out, "apply to all raw files.  You can force WAVE files to be treated as a raw files\n");
 574         fprintf(out, "using -fr.\n");
 575         fprintf(out, "\n");
 576         fprintf(out, "generic options:\n");
 577         fprintf(out, "  -d : decode (default behavior is encode)\n");
 578         fprintf(out, "  -t : test (same as -d except no decoded file is written)\n");
 579         fprintf(out, "  -a : analyze (same as -d except an analysis file is written)\n");
 580         fprintf(out, "  -c : write output to stdout\n");
 581         fprintf(out, "  -s : silent (do not write runtime encode/decode statistics)\n");
 582         fprintf(out, "  -o filename : force the output file name (usually flac just changes the\n");
 583         fprintf(out, "                extension)\n");
 584         fprintf(out, "  --output-prefix string : prefix each output file name with the given string.\n");
 585         fprintf(out, "    This can be useful for encoding/decoding files to a different directory.\n");
 586         fprintf(out, "    Make sure if your string is a path name that it ends with a '/' slash.\n");
 587         fprintf(out, "  --delete-input-file : deletes the input file after a successful encode/decode\n");
 588         fprintf(out, "  --skip samples : can be used both for encoding and decoding\n");
 589         fprintf(out, "analyze options:\n");
 590         fprintf(out, "  --a-rtext : include residual signal in text output\n");
 591         fprintf(out, "  --a-rgp : generate gnuplot files of residual distribution of each subframe\n");
 592         fprintf(out, "encoding options:\n");
 593 #ifdef FLAC__HAS_OGG
 594         fprintf(out, "  --ogg : output Ogg-FLAC stream instead of native FLAC\n");
 595 #endif
 596         fprintf(out, "  --lax : allow encoder to generate non-Subset files\n");
 597         fprintf(out, "  --sector-align : align encoding of multiple files on sector boundaries\n");
 598         fprintf(out, "  -S { # | X | #x } : include a point or points in a SEEKTABLE\n");
 599         fprintf(out, "       #  : a specific sample number for a seek point\n");
 600         fprintf(out, "       X  : a placeholder point (always goes at the end of the SEEKTABLE)\n");
 601         fprintf(out, "       #x : # evenly spaced seekpoints, the first being at sample 0\n");
 602         fprintf(out, "     You may use many -S options; the resulting SEEKTABLE will be the unique-\n");
 603         fprintf(out, "           ified union of all such values.\n");
 604         fprintf(out, "     With no -S options, flac defaults to '-S 100x'.  Use -S- for no SEEKTABLE.\n");
 605         fprintf(out, "     Note: -S #x will not work if the encoder can't determine the input size\n");
 606         fprintf(out, "           before starting.\n");
 607         fprintf(out, "     Note: if you use -S # and # is >= samples in the input, there will be\n");
 608         fprintf(out, "           either no seek point entered (if the input size is determinable\n");
 609         fprintf(out, "           before encoding starts) or a placeholder point (if input size is not\n");
 610         fprintf(out, "           determinable)\n");
 611         fprintf(out, "  -P # : write a PADDING block of length # (goes after SEEKTABLE)\n");
 612         fprintf(out, "         (# must be >= 0; default is -P-).  Note that the overall size in bytes\n");
 613         fprintf(out, "         of the PADDING block will be # + 4 because of the metadata header.\n");
 614         fprintf(out, "  -b # : specify blocksize in samples; default is 1152 for -l 0, else 4608;\n");
 615         fprintf(out, "         must be 192/576/1152/2304/4608/256/512/1024/2048/4096/8192/16384/32768\n");
 616         fprintf(out, "         (unless --lax is used)\n");
 617         fprintf(out, "  -m   : try mid-side coding for each frame (stereo input only)\n");
 618         fprintf(out, "  -M   : adaptive mid-side coding for all frames (stereo input only)\n");
 619         fprintf(out, "  -0 .. -8 : fastest compression .. highest compression, default is -5\n");
 620         fprintf(out, "             these are synonyms for other options:\n");
 621         fprintf(out, "  -0   : synonymous with -l 0 -b 1152 -r 2,2\n");
 622         fprintf(out, "  -1   : synonymous with -l 0 -b 1152 -M -r 2,2\n");
 623         fprintf(out, "  -2   : synonymous with -l 0 -b 1152 -m -r 3\n");
 624         fprintf(out, "  -3   : synonymous with -l 6 -b 4608 -r 3,3\n");
 625         fprintf(out, "  -4   : synonymous with -l 8 -b 4608 -M -r 3,3\n");
 626         fprintf(out, "  -5   : synonymous with -l 8 -b 4608 -m -r 3,3\n");
 627         fprintf(out, "  -6   : synonymous with -l 8 -b 4608 -m -r 4\n");
 628         fprintf(out, "  -7   : synonymous with -l 8 -b 4608 -m -e -r 6\n");
 629         fprintf(out, "  -8   : synonymous with -l 12 -b 4608 -m -e -r 6\n");
 630         fprintf(out, "  --fast, --best : synonymous with -0 and -8 respectively\n");
 631         fprintf(out, "  -e   : do exhaustive model search (expensive!)\n");
 632         fprintf(out, "  -E   : include escape coding in the entropy coder\n");
 633         fprintf(out, "  -l # : specify max LPC order; 0 => use only fixed predictors\n");
 634         fprintf(out, "  -p   : do exhaustive search of LP coefficient quantization (expensive!);\n");
 635         fprintf(out, "         overrides -q, does nothing if using -l 0\n");
 636         fprintf(out, "  -q # : specify precision in bits of quantized linear-predictor coefficients;\n");
 637         fprintf(out, "         0 => let encoder decide (min is %u, default is -q 0)\n", FLAC__MIN_QLP_COEFF_PRECISION);
 638         fprintf(out, "  -r [#,]# : [min,]max residual partition order (# is 0..16; min defaults to 0;\n");
 639         fprintf(out, "         default is -r 0; above 4 doesn't usually help much)\n");
 640         fprintf(out, "  -R # : Rice parameter search distance (# is 0..32; above 2 doesn't help much)\n");
 641         fprintf(out, "  -V   : verify a correct encoding by decoding the output in parallel and\n");
 642         fprintf(out, "         comparing to the original\n");
 643         fprintf(out, "  -S-, -P-, -m-, -M-, -e-, -E-, -p-, -V-, --delete-input-file-,%s --lax-,\n",
 644 #ifdef FLAC__HAS_OGG
 645                 " --ogg-,"
 646 #else
 647                 ""
 648 #endif
 649         );
 650         fprintf(out, "  --sector-align- can all be used to turn off a particular option\n");
 651         fprintf(out, "format options:\n");
 652         fprintf(out, "  -fb | -fl : big-endian | little-endian byte order\n");
 653         fprintf(out, "  -fc channels\n");
 654         fprintf(out, "  -fp bits_per_sample\n");
 655         fprintf(out, "  -fs sample_rate : in Hz\n");
 656         fprintf(out, "  -fu : unsigned samples (default is signed)\n");
 657         fprintf(out, "  -fr : force input to be treated as raw samples\n");
 658
 659         return message? 1 : 0;
 660 }
 661
 662 int encode_file(const char *infilename, const char *forced_outfilename, FLAC__bool is_last_file)
 663 {
 664         FILE *encode_infile;
 665         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 666         char *p;
 667         FLAC__byte lookahead[12];
 668         unsigned lookahead_length = 0;
 669         FLAC__bool treat_as_wave = false;
 670         int retval;
 671         long infilesize;
 672         encode_options_t common_options;
 673
 674         if(0 == strcmp(infilename, "-")) {
 675                 infilesize = -1;
 676                 encode_infile = file__get_binary_stdin();
 677         }
 678         else {
 679                 infilesize = flac__file_get_filesize(infilename);
 680                 if(0 == (encode_infile = fopen(infilename, "rb"))) {
 681                         fprintf(stderr, "ERROR: can't open input file %s\n", infilename);
 682                         return 1;
 683                 }
 684         }
 685
 686         if(!force_raw_format) {
 687                 /* first set format based on name */
 688                 if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".wav"))
 689                         treat_as_wave = true;
 690                 else
 691                         treat_as_wave = false;
 692
 693                 /* attempt to guess the file type based on the first 12 bytes */
 694                 if((lookahead_length = fread(lookahead, 1, 12, encode_infile)) < 12) {
 695                         if(treat_as_wave)
 696                                 fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 697                         treat_as_wave = false;
 698                 }
 699                 else {
 700                         if(strncmp(lookahead, "RIFF", 4) || strncmp(lookahead+8, "WAVE", 4)) {
 701                                 if(treat_as_wave)
 702                                         fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 703                                 treat_as_wave = false;
 704                         }
 705                         else
 706                                 treat_as_wave = true;
 707                 }
 708         }
 709
 710         if(sector_align && !treat_as_wave && infilesize < 0) {
 711                 fprintf(stderr, "ERROR: can't --sector-align when the input size is unknown\n");
 712                 return 1;
 713         }
 714
 715         if(!treat_as_wave) {
 716                 if(format_is_big_endian < 0 || format_channels < 0 || format_bps < 0 || format_sample_rate < 0)
 717                         return long_usage("ERROR: for encoding a raw file you must specify { -fb or -fl }, -fc, -fp, and -fs\n");
 718         }
 719
 720         if(encode_infile == stdin || force_to_stdout)
 721                 strcpy(outfilename, "-");
 722         else {
 723                 const char *suffix = (use_ogg? ogg_suffix : flac_suffix);
 724                 strcpy(outfilename, output_prefix? output_prefix : "");
 725                 strcat(outfilename, infilename);
 726                 if(0 == (p = strrchr(outfilename, '.')))
 727                         strcat(outfilename, suffix);
 728                 else {
 729                         if(0 == strcmp(p, suffix)) {
 730                                 strcpy(p, "_new");
 731                                 strcat(p, suffix);
 732                         }
 733                         else
 734                                 strcpy(p, suffix);
 735                 }
 736         }
 737         if(0 == forced_outfilename)
 738                 forced_outfilename = outfilename;
 739         if(0 != cmdline_forced_outfilename)
 740                 forced_outfilename = cmdline_forced_outfilename;
 741
 742         common_options.verbose = verbose;
 743         common_options.skip = skip;
 744         common_options.verify = verify;
 745 #ifdef FLAC__HAS_OGG
 746         common_options.use_ogg = use_ogg;
 747 #endif
 748         common_options.lax = lax;
 749         common_options.do_mid_side = do_mid_side;
 750         common_options.loose_mid_side = loose_mid_side;
 751         common_options.do_exhaustive_model_search = do_exhaustive_model_search;
 752         common_options.do_escape_coding = do_escape_coding;
 753         common_options.do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 754         common_options.min_residual_partition_order = min_residual_partition_order;
 755         common_options.max_residual_partition_order = max_residual_partition_order;
 756         common_options.rice_parameter_search_dist = rice_parameter_search_dist;
 757         common_options.max_lpc_order = max_lpc_order;
 758         common_options.blocksize = (unsigned)blocksize;
 759         common_options.qlp_coeff_precision = qlp_coeff_precision;
 760         common_options.padding = padding;
 761         common_options.requested_seek_points = requested_seek_points;
 762         common_options.num_requested_seek_points = num_requested_seek_points;
 763
 764         if(treat_as_wave) {
 765                 wav_encode_options_t options;
 766
 767                 options.common = common_options;
 768                 options.is_last_file = is_last_file;
 769                 options.align_reservoir = align_reservoir;
 770                 options.align_reservoir_samples = &align_reservoir_samples;
 771                 options.sector_align = sector_align;
 772
 773                 retval = flac__encode_wav(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, options);
 774         }
 775         else {
 776                 raw_encode_options_t options;
 777
 778                 options.common = common_options;
 779                 options.is_big_endian = format_is_big_endian;
 780                 options.is_unsigned_samples = format_is_unsigned_samples;
 781                 options.channels = format_channels;
 782                 options.bps = format_bps;
 783                 options.sample_rate = format_sample_rate;
 784
 785                 retval = flac__encode_raw(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, options);
 786         }
 787
 788         if(retval == 0 && strcmp(infilename, "-")) {
 789                 if(strcmp(forced_outfilename, "-"))
 790                         flac__file_copy_metadata(infilename, forced_outfilename);
 791                 if(delete_input)
 792                         unlink(infilename);
 793         }
 794
 795         return 0;
 796 }
 797
 798 int decode_file(const char *infilename, const char *forced_outfilename)
 799 {
 800         static const char *suffixes[] = { ".wav", ".raw", ".ana" };
 801         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 802         char *p;
 803         int retval;
 804         FLAC__bool treat_as_ogg = false;
 805         decode_options_t common_options;
 806
 807         if(!test_only && !analyze) {
 808                 if(force_raw_format && format_is_big_endian < 0)
 809                         return long_usage("ERROR: for decoding to a raw file you must specify -fb or -fl\n");
 810         }
 811
 812         if(0 == strcmp(infilename, "-") || force_to_stdout)
 813                 strcpy(outfilename, "-");
 814         else {
 815                 const char *suffix = suffixes[analyze? 2 : force_raw_format? 1 : 0];
 816                 strcpy(outfilename, output_prefix? output_prefix : "");
 817                 strcat(outfilename, infilename);
 818                 if(0 == (p = strrchr(outfilename, '.')))
 819                         strcat(outfilename, suffix);
 820                 else {
 821                         if(0 == strcmp(p, suffix)) {
 822                                 strcpy(p, "_new");
 823                                 strcat(p, suffix);
 824                         }
 825                         else
 826                                 strcpy(p, suffix);
 827                 }
 828         }
 829         if(0 == forced_outfilename)
 830                 forced_outfilename = outfilename;
 831         if(0 != cmdline_forced_outfilename)
 832                 forced_outfilename = cmdline_forced_outfilename;
 833
 834         if(use_ogg)
 835                 treat_as_ogg = true;
 836         else if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".ogg"))
 837                 treat_as_ogg = true;
 838         else
 839                 treat_as_ogg = false;
 840
 841 #ifndef FLAC__HAS_OGG
 842         if(treat_as_ogg) {
 843                 fprintf(stderr, "%s: Ogg support has not been built into this copy of flac\n", infilename);
 844                 return 1;
 845         }
 846 #endif
 847
 848         common_options.verbose = verbose;
 849 #ifdef FLAC__HAS_OGG
 850         common_options.is_ogg = treat_as_ogg;
 851 #endif
 852         common_options.skip = skip;
 853
 854         if(!force_raw_format) {
 855                 wav_decode_options_t options;
 856
 857                 options.common = common_options;
 858
 859                 retval = flac__decode_wav(infilename, test_only? 0 : forced_outfilename, analyze, aopts, options);
 860         }
 861         else {
 862                 raw_decode_options_t options;
 863
 864                 options.common = common_options;
 865                 options.is_big_endian = format_is_big_endian;
 866                 options.is_unsigned_samples = format_is_unsigned_samples;
 867
 868                 retval = flac__decode_raw(infilename, test_only? 0 : forced_outfilename, analyze, aopts, options);
 869         }
 870
 871         if(retval == 0 && strcmp(infilename, "-")) {
 872                 if(strcmp(forced_outfilename, "-"))
 873                         flac__file_copy_metadata(infilename, forced_outfilename);
 874                 if(delete_input)
 875                         unlink(infilename);
 876         }
 877
 878         return 0;
 879 }