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