src/flac/main.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001  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 #ifndef _MSC_VER
  25 /* unlink is in stdio.h in VC++ */
  26 #include <unistd.h> /* for unlink() */
  27 #endif
  28 #include "FLAC/all.h"
  29 #include "analyze.h"
  30 #include "decode.h"
  31 #include "encode.h"
  32 #include "file.h"
  33
  34 static int usage(const char *message, ...);
  35 static int encode_file(const char *infilename, const char *forced_outfilename);
  36 static int decode_file(const char *infilename, const char *forced_outfilename);
  37
  38 bool verify = false, verbose = true, lax = false, test_only = false, analyze = false;
  39 bool do_mid_side = true, loose_mid_side = false, do_exhaustive_model_search = false, do_qlp_coeff_prec_search = false;
  40 bool force_to_stdout = false, delete_input = false;
  41 const char *cmdline_forced_outfilename = 0;
  42 analysis_options aopts = { false, false };
  43 unsigned padding = 0;
  44 unsigned max_lpc_order = 8;
  45 unsigned qlp_coeff_precision = 0;
  46 uint64 skip = 0;
  47 int format_is_wave = -1, format_is_big_endian = -1, format_is_unsigned_samples = false;
  48 int format_channels = -1, format_bps = -1, format_sample_rate = -1;
  49 int blocksize = -1, min_residual_partition_order = -1, max_residual_partition_order = -1, rice_parameter_search_dist = -1;
  50 char requested_seek_points[50000]; /* @@@ bad MAGIC NUMBER */
  51 int num_requested_seek_points = -1; /* -1 => no -S options were given, 0 => -S- was given */
  52
  53 int main(int argc, char *argv[])
  54 {
  55         int i, retval = 0;
  56         bool mode_decode = false;
  57
  58         if(argc <= 1)
  59                 return usage(0);
  60
  61         /* get the options */
  62         for(i = 1; i < argc; i++) {
  63                 if(argv[i][0] != '-' || argv[i][1] == 0)
  64                         break;
  65                 if(0 == strcmp(argv[i], "-d"))
  66                         mode_decode = true;
  67                 else if(0 == strcmp(argv[i], "-a")) {
  68                         mode_decode = true;
  69                         analyze = true;
  70                 }
  71                 else if(0 == strcmp(argv[i], "-t")) {
  72                         mode_decode = true;
  73                         test_only = true;
  74                 }
  75                 else if(0 == strcmp(argv[i], "-c"))
  76                         force_to_stdout = true;
  77                 else if(0 == strcmp(argv[i], "-s"))
  78                         verbose = false;
  79                 else if(0 == strcmp(argv[i], "-s-"))
  80                         verbose = true;
  81                 else if(0 == strcmp(argv[i], "-S")) {
  82                         if(num_requested_seek_points < 0)
  83                                 num_requested_seek_points = 0;
  84                         num_requested_seek_points++;
  85                         strcat(requested_seek_points, argv[++i]);
  86                         strcat(requested_seek_points, "<");
  87                 }
  88                 else if(0 == strcmp(argv[i], "-S-")) {
  89                         num_requested_seek_points = 0;
  90                         requested_seek_points[0] = '\0';
  91                 }
  92                 else if(0 == strcmp(argv[i], "--delete-input-file"))
  93                         delete_input = true;
  94                 else if(0 == strcmp(argv[i], "--delete-input-file-"))
  95                         delete_input = false;
  96                 else if(0 == strcmp(argv[i], "--skip"))
  97                         skip = (uint64)atoi(argv[++i]); /* @@@ takes a pretty damn big file to overflow atoi() here, but it could happen */
  98                 else if(0 == strcmp(argv[i], "--lax"))
  99                         lax = true;
 100                 else if(0 == strcmp(argv[i], "--lax-"))
 101                         lax = false;
 102                 else if(0 == strcmp(argv[i], "-b"))
 103                         blocksize = atoi(argv[++i]);
 104                 else if(0 == strcmp(argv[i], "-e"))
 105                         do_exhaustive_model_search = true;
 106                 else if(0 == strcmp(argv[i], "-e-"))
 107                         do_exhaustive_model_search = false;
 108                 else if(0 == strcmp(argv[i], "-l"))
 109                         max_lpc_order = atoi(argv[++i]);
 110                 else if(0 == strcmp(argv[i], "-m")) {
 111                         do_mid_side = true;
 112                         loose_mid_side = false;
 113                 }
 114                 else if(0 == strcmp(argv[i], "-m-"))
 115                         do_mid_side = loose_mid_side = false;
 116                 else if(0 == strcmp(argv[i], "-M"))
 117                         loose_mid_side = do_mid_side = true;
 118                 else if(0 == strcmp(argv[i], "-M-"))
 119                         loose_mid_side = do_mid_side = false;
 120                 else if(0 == strcmp(argv[i], "-o"))
 121                         cmdline_forced_outfilename = argv[++i];
 122                 else if(0 == strcmp(argv[i], "-p"))
 123                         do_qlp_coeff_prec_search = true;
 124                 else if(0 == strcmp(argv[i], "-p-"))
 125                         do_qlp_coeff_prec_search = false;
 126                 else if(0 == strcmp(argv[i], "-P"))
 127                         padding = atoi(argv[++i]);
 128                 else if(0 == strcmp(argv[i], "-q"))
 129                         qlp_coeff_precision = atoi(argv[++i]);
 130                 else if(0 == strcmp(argv[i], "-r")) {
 131                         char *p = strchr(argv[++i], ',');
 132                         if(0 == p) {
 133                                 min_residual_partition_order = 0;
 134                                 max_residual_partition_order = atoi(argv[i]);
 135                         }
 136                         else {
 137                                 min_residual_partition_order = atoi(argv[i]);
 138                                 max_residual_partition_order = atoi(++p);
 139                         }
 140                 }
 141                 else if(0 == strcmp(argv[i], "-R"))
 142                         rice_parameter_search_dist = atoi(argv[++i]);
 143                 else if(0 == strcmp(argv[i], "-V"))
 144                         verify = true;
 145                 else if(0 == strcmp(argv[i], "-V-"))
 146                         verify = false;
 147                 else if(0 == strcmp(argv[i], "-fb"))
 148                         format_is_big_endian = true;
 149                 else if(0 == strcmp(argv[i], "-fl"))
 150                         format_is_big_endian = false;
 151                 else if(0 == strcmp(argv[i], "-fc"))
 152                         format_channels = atoi(argv[++i]);
 153                 else if(0 == strcmp(argv[i], "-fp"))
 154                         format_bps = atoi(argv[++i]);
 155                 else if(0 == strcmp(argv[i], "-fs"))
 156                         format_sample_rate = atoi(argv[++i]);
 157                 else if(0 == strcmp(argv[i], "-fu"))
 158                         format_is_unsigned_samples = true;
 159                 else if(0 == strcmp(argv[i], "-fr"))
 160                         format_is_wave = false;
 161                 else if(0 == strcmp(argv[i], "-fw"))
 162                         format_is_wave = true;
 163                 else if(0 == strcmp(argv[i], "--a-rgp"))
 164                         aopts.do_residual_gnuplot = true;
 165                 else if(0 == strcmp(argv[i], "--a-rgp-"))
 166                         aopts.do_residual_gnuplot = false;
 167                 else if(0 == strcmp(argv[i], "--a-rtext"))
 168                         aopts.do_residual_text = true;
 169                 else if(0 == strcmp(argv[i], "--a-rtext-"))
 170                         aopts.do_residual_text = false;
 171                 else if(0 == strcmp(argv[i], "-0")) {
 172                         do_exhaustive_model_search = false;
 173                         do_mid_side = false;
 174                         loose_mid_side = false;
 175                         qlp_coeff_precision = 0;
 176                         min_residual_partition_order = max_residual_partition_order = 2;
 177                         rice_parameter_search_dist = 0;
 178                         max_lpc_order = 0;
 179                 }
 180                 else if(0 == strcmp(argv[i], "-1")) {
 181                         do_exhaustive_model_search = false;
 182                         do_mid_side = true;
 183                         loose_mid_side = true;
 184                         qlp_coeff_precision = 0;
 185                         min_residual_partition_order = max_residual_partition_order = 2;
 186                         rice_parameter_search_dist = 0;
 187                         max_lpc_order = 0;
 188                 }
 189                 else if(0 == strcmp(argv[i], "-2")) {
 190                         do_exhaustive_model_search = false;
 191                         do_mid_side = true;
 192                         loose_mid_side = false;
 193                         qlp_coeff_precision = 0;
 194                         min_residual_partition_order = 0;
 195                         max_residual_partition_order = 3;
 196                         rice_parameter_search_dist = 0;
 197                         max_lpc_order = 0;
 198                 }
 199                 else if(0 == strcmp(argv[i], "-3")) {
 200                         do_exhaustive_model_search = false;
 201                         do_mid_side = false;
 202                         loose_mid_side = false;
 203                         qlp_coeff_precision = 0;
 204                         min_residual_partition_order = max_residual_partition_order = 3;
 205                         rice_parameter_search_dist = 0;
 206                         max_lpc_order = 6;
 207                 }
 208                 else if(0 == strcmp(argv[i], "-4")) {
 209                         do_exhaustive_model_search = false;
 210                         do_mid_side = true;
 211                         loose_mid_side = true;
 212                         qlp_coeff_precision = 0;
 213                         min_residual_partition_order = max_residual_partition_order = 3;
 214                         rice_parameter_search_dist = 0;
 215                         max_lpc_order = 8;
 216                 }
 217                 else if(0 == strcmp(argv[i], "-5")) {
 218                         do_exhaustive_model_search = false;
 219                         do_mid_side = true;
 220                         loose_mid_side = false;
 221                         qlp_coeff_precision = 0;
 222                         min_residual_partition_order = max_residual_partition_order = 3;
 223                         rice_parameter_search_dist = 0;
 224                         max_lpc_order = 8;
 225                 }
 226                 else if(0 == strcmp(argv[i], "-6")) {
 227                         do_exhaustive_model_search = false;
 228                         do_mid_side = true;
 229                         loose_mid_side = false;
 230                         qlp_coeff_precision = 0;
 231                         min_residual_partition_order = 0;
 232                         max_residual_partition_order = 4;
 233                         rice_parameter_search_dist = 0;
 234                         max_lpc_order = 8;
 235                 }
 236                 else if(0 == strcmp(argv[i], "-7")) {
 237                         do_exhaustive_model_search = true;
 238                         do_mid_side = true;
 239                         loose_mid_side = false;
 240                         qlp_coeff_precision = 0;
 241                         min_residual_partition_order = 0;
 242                         max_residual_partition_order = 6;
 243                         rice_parameter_search_dist = 0;
 244                         max_lpc_order = 8;
 245                 }
 246                 else if(0 == strcmp(argv[i], "-8")) {
 247                         do_exhaustive_model_search = true;
 248                         do_mid_side = true;
 249                         loose_mid_side = false;
 250                         qlp_coeff_precision = 0;
 251                         min_residual_partition_order = 0;
 252                         max_residual_partition_order = 6;
 253                         rice_parameter_search_dist = 0;
 254                         max_lpc_order = 12;
 255                 }
 256                 else if(0 == strcmp(argv[i], "-9")) {
 257                         do_exhaustive_model_search = true;
 258                         do_mid_side = true;
 259                         loose_mid_side = false;
 260                         do_qlp_coeff_prec_search = true;
 261                         min_residual_partition_order = 0;
 262                         max_residual_partition_order = 16;
 263                         rice_parameter_search_dist = 0;
 264                         max_lpc_order = 32;
 265                 }
 266                 else if(isdigit((int)(argv[i][1]))) {
 267                         return usage("ERROR: compression level '%s' is still reserved\n", argv[i]);
 268                 }
 269                 else {
 270                         return usage("ERROR: invalid option '%s'\n", argv[i]);
 271                 }
 272         }
 273
 274         /* tweak options; validate the values */
 275         if(!mode_decode) {
 276                 if(blocksize < 0) {
 277                         if(max_lpc_order == 0)
 278                                 blocksize = 1152;
 279                         else
 280                                 blocksize = 4608;
 281                 }
 282                 if(max_residual_partition_order < 0) {
 283                         if(blocksize <= 1152)
 284                                 max_residual_partition_order = 2;
 285                         else if(blocksize <= 2304)
 286                                 max_residual_partition_order = 3;
 287                         else if(blocksize <= 4608)
 288                                 max_residual_partition_order = 3;
 289                         else
 290                                 max_residual_partition_order = 4;
 291                         min_residual_partition_order = max_residual_partition_order;
 292                 }
 293                 if(rice_parameter_search_dist < 0) {
 294                         rice_parameter_search_dist = 0;
 295                 }
 296         }
 297         else {
 298                 if(test_only) {
 299                         if(skip > 0)
 300                                 return usage("ERROR: --skip is not allowed in test mode\n");
 301                 }
 302         }
 303
 304         FLAC__ASSERT(blocksize >= 0 || mode_decode);
 305
 306         if(format_channels >= 0) {
 307                 if(format_channels == 0 || (unsigned)format_channels > FLAC__MAX_CHANNELS)
 308                         return usage("ERROR: invalid number of channels '%u', must be > 0 and <= %u\n", format_channels, FLAC__MAX_CHANNELS);
 309         }
 310         if(format_bps >= 0) {
 311                 if(format_bps != 8 && format_bps != 16 && format_bps != 24)
 312                         return usage("ERROR: invalid bits per sample '%u' (must be 8/16/24)\n", format_bps);
 313         }
 314         if(format_sample_rate >= 0) {
 315                 if(format_sample_rate == 0 || (unsigned)format_sample_rate > FLAC__MAX_SAMPLE_RATE)
 316                         return usage("ERROR: invalid sample rate '%u', must be > 0 and <= %u\n", format_sample_rate, FLAC__MAX_SAMPLE_RATE);
 317         }
 318         if(!mode_decode && ((unsigned)blocksize < FLAC__MIN_BLOCK_SIZE || (unsigned)blocksize > FLAC__MAX_BLOCK_SIZE)) {
 319                 return usage("ERROR: invalid blocksize '%u', must be >= %u and <= %u\n", (unsigned)blocksize, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
 320         }
 321         if(qlp_coeff_precision > 0 && qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION) {
 322                 return usage("ERROR: invalid value for -q '%u', must be 0 or >= %u\n", qlp_coeff_precision, FLAC__MIN_QLP_COEFF_PRECISION);
 323         }
 324
 325         if(verbose) {
 326                 fprintf(stderr, "\n");
 327                 fprintf(stderr, "flac %s, Copyright (C) 2000,2001 Josh Coalson\n", FLAC__VERSION_STRING);
 328                 fprintf(stderr, "flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are\n");
 329                 fprintf(stderr, "welcome to redistribute it under certain conditions.  Type `flac' for details.\n\n");
 330
 331                 if(!mode_decode) {
 332                         fprintf(stderr, "options:%s%s -P %u -b %u%s -l %u%s%s -q %u -r %u,%u -R %u%s\n",
 333                                 delete_input?" --delete-input-file":"", lax?" --lax":"",
 334                                 padding, (unsigned)blocksize, loose_mid_side?" -M":do_mid_side?" -m":"", max_lpc_order,
 335                                 do_exhaustive_model_search?" -e":"", do_qlp_coeff_prec_search?" -p":"",
 336                                 qlp_coeff_precision,
 337                                 (unsigned)min_residual_partition_order, (unsigned)max_residual_partition_order, (unsigned)rice_parameter_search_dist,
 338                                 verify? " -V":""
 339                         );
 340                 }
 341         }
 342
 343         if(mode_decode) {
 344                 bool first = true;
 345                 int save_format;
 346
 347                 if(i == argc) {
 348                         retval = decode_file("-", 0);
 349                 }
 350                 else {
 351                         if(i + 1 != argc)
 352                                 cmdline_forced_outfilename = 0;
 353                         for(retval = 0; i < argc && retval == 0; i++) {
 354                                 if(0 == strcmp(argv[i], "-") && !first)
 355                                         continue;
 356                                 save_format = format_is_wave;
 357                                 retval = decode_file(argv[i], 0);
 358                                 format_is_wave = save_format;
 359                                 first = false;
 360                         }
 361                 }
 362         }
 363         else { /* encode */
 364                 bool first = true;
 365                 int save_format;
 366
 367                 if(i == argc) {
 368                         retval = encode_file("-", 0);
 369                 }
 370                 else {
 371                         if(i + 1 != argc)
 372                                 cmdline_forced_outfilename = 0;
 373                         for(retval = 0; i < argc && retval == 0; i++) {
 374                                 if(0 == strcmp(argv[i], "-") && !first)
 375                                         continue;
 376                                 save_format = format_is_wave;
 377                                 retval = encode_file(argv[i], 0);
 378                                 format_is_wave = save_format;
 379                                 first = false;
 380                         }
 381                 }
 382         }
 383
 384         return retval;
 385 }
 386
 387 int usage(const char *message, ...)
 388 {
 389         va_list args;
 390
 391         if(message) {
 392                 va_start(args, message);
 393
 394                 (void) vfprintf(stderr, message, args);
 395
 396                 va_end(args);
 397
 398         }
 399         fprintf(stderr, "===============================================================================\n");
 400         fprintf(stderr, "flac - Command-line FLAC encoder/decoder version %s\n", FLAC__VERSION_STRING);
 401         fprintf(stderr, "Copyright (C) 2000,2001  Josh Coalson\n");
 402         fprintf(stderr, "\n");
 403         fprintf(stderr, "This program is free software; you can redistribute it and/or\n");
 404         fprintf(stderr, "modify it under the terms of the GNU General Public License\n");
 405         fprintf(stderr, "as published by the Free Software Foundation; either version 2\n");
 406         fprintf(stderr, "of the License, or (at your option) any later version.\n");
 407         fprintf(stderr, "\n");
 408         fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
 409         fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
 410         fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n");
 411         fprintf(stderr, "GNU General Public License for more details.\n");
 412         fprintf(stderr, "\n");
 413         fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
 414         fprintf(stderr, "along with this program; if not, write to the Free Software\n");
 415         fprintf(stderr, "Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.\n");
 416         fprintf(stderr, "===============================================================================\n");
 417         fprintf(stderr, "Usage:\n");
 418         fprintf(stderr, "  flac [options] [infile [...]]\n");
 419         fprintf(stderr, "\n");
 420         fprintf(stderr, "For encoding:\n");
 421         fprintf(stderr, "  the input file(s) may be a PCM RIFF WAVE file or raw samples\n");
 422         fprintf(stderr, "  the output file(s) will be in FLAC format\n");
 423         fprintf(stderr, "For decoding, the reverse is true\n");
 424         fprintf(stderr, "\n");
 425         fprintf(stderr, "A single 'infile' may be - for stdin.  No 'infile' implies stdin.  Use of\n");
 426         fprintf(stderr, "stdin implies -c (write to stdout).  Normally you should use:\n");
 427         fprintf(stderr, "   flac [options] -o outfilename  or  flac -d [options] -o outfilename\n");
 428         fprintf(stderr, "instead of:\n");
 429         fprintf(stderr, "   flac [options] > outfilename   or  flac -d [options] > outfilename\n");
 430         fprintf(stderr, "since the former allows flac to seek backwards to write the STREAMINFO or\n");
 431         fprintf(stderr, "RIFF WAVE header contents when necessary.\n");
 432         fprintf(stderr, "\n");
 433         fprintf(stderr, "If the unencoded filename ends with '.wav' or -fw is used, it's assumed to be\n");
 434         fprintf(stderr, "RIFF WAVE.  Otherwise, flac will check for the presence of a RIFF header.  If\n");
 435         fprintf(stderr, "any infile is raw you must specify the format options {-fb|fl} -fc -fp and -fs,\n");
 436         fprintf(stderr, "which will apply to all raw files.  You can force a .wav file to be treated as\n");
 437         fprintf(stderr, "a raw file using -fr.\n");
 438         fprintf(stderr, "\n");
 439         fprintf(stderr, "generic options:\n");
 440         fprintf(stderr, "  -d : decode (default behavior is encode)\n");
 441         fprintf(stderr, "  -t : test (same as -d except no decoded file is written)\n");
 442         fprintf(stderr, "  -a : analyze (same as -d except an analysis file is written)\n");
 443         fprintf(stderr, "  -c : write output to stdout\n");
 444         fprintf(stderr, "  -s : silent (do not write runtime encode/decode statistics)\n");
 445         fprintf(stderr, "  -o filename : force the output file name (usually flac just changes the\n");
 446         fprintf(stderr, "                extension)\n");
 447         fprintf(stderr, "  --delete-input-file : deletes the input file after a successful encode/decode\n");
 448         fprintf(stderr, "  --skip samples : can be used both for encoding and decoding\n");
 449         fprintf(stderr, "analyze options:\n");
 450         fprintf(stderr, "  --a-rtext : include residual signal in text output\n");
 451         fprintf(stderr, "  --a-rgp : generate gnuplot files of residual distribution of each subframe\n");
 452         fprintf(stderr, "encoding options:\n");
 453         fprintf(stderr, "  --lax : allow encoder to generate non-Subset files\n");
 454         fprintf(stderr, "  -S { # | X | #x } : include a point or points in a SEEKTABLE\n");
 455         fprintf(stderr, "       #  : a specific sample number for a seek point\n");
 456         fprintf(stderr, "       X  : a placeholder point (always goes at the end of the SEEKTABLE)\n");
 457         fprintf(stderr, "       #x : # evenly spaced seekpoints, the first being at sample 0\n");
 458         fprintf(stderr, "     You may use many -S options; the resulting SEEKTABLE will be the unique-\n");
 459         fprintf(stderr, "           ified union of all such values.\n");
 460         fprintf(stderr, "     With no -S options, flac defaults to '-S 100x'.  Use -S- for no SEEKTABLE.\n");
 461         fprintf(stderr, "     Note: -S #x will not work if the encoder can't determine the input size\n");
 462         fprintf(stderr, "           before starting.\n");
 463         fprintf(stderr, "     Note: if you use -S # and # is >= samples in the input, there will be\n");
 464         fprintf(stderr, "           either no seek point entered (if the input size is determinable\n");
 465         fprintf(stderr, "           before encoding starts) or a placeholder point (if input size is not\n");
 466         fprintf(stderr, "           determinable)\n");
 467         fprintf(stderr, "  -P # : write a PADDING block of # bytes (goes after SEEKTABLE)\n");
 468         fprintf(stderr, "         (0 => no PADDING block, default is -P 0)\n");
 469         fprintf(stderr, "  -b # : specify blocksize in samples; default is 1152 for -l 0, else 4608;\n");
 470         fprintf(stderr, "         must be 192/576/1152/2304/4608/256/512/1024/2048/4096/8192/16384/32768\n");
 471         fprintf(stderr, "         (unless --lax is used)\n");
 472         fprintf(stderr, "  -m   : try mid-side coding for each frame (stereo input only)\n");
 473         fprintf(stderr, "  -M   : loose mid-side coding for all frames (stereo input only)\n");
 474         fprintf(stderr, "  -0 .. -9 : fastest compression .. highest compression, default is -5\n");
 475         fprintf(stderr, "             these are synonyms for other options:\n");
 476         fprintf(stderr, "  -0   : synonymous with -l 0 -b 1152 -r 2,2\n");
 477         fprintf(stderr, "  -1   : synonymous with -l 0 -b 1152 -M -r 2,2\n");
 478         fprintf(stderr, "  -2   : synonymous with -l 0 -b 1152 -m -r 3\n");
 479         fprintf(stderr, "  -3   : synonymous with -l 6 -b 4608 -r 3,3\n");
 480         fprintf(stderr, "  -4   : synonymous with -l 8 -b 4608 -M -r 3,3\n");
 481         fprintf(stderr, "  -5   : synonymous with -l 8 -b 4608 -m -r 3,3\n");
 482         fprintf(stderr, "  -6   : synonymous with -l 8 -b 4608 -m -r 4\n");
 483         fprintf(stderr, "  -7   : synonymous with -l 8 -b 4608 -m -e -r 6\n");
 484         fprintf(stderr, "  -8   : synonymous with -l 12 -b 4608 -m -e -r 6\n");
 485         fprintf(stderr, "  -9   : synonymous with -l 32 -b 4608 -m -e -r 16 -p (very slow!)\n");
 486         fprintf(stderr, "  -e   : do exhaustive model search (expensive!)\n");
 487         fprintf(stderr, "  -l # : specify max LPC order; 0 => use only fixed predictors\n");
 488         fprintf(stderr, "  -p   : do exhaustive search of LP coefficient quantization (expensive!);\n");
 489         fprintf(stderr, "         overrides -q, does nothing if using -l 0\n");
 490         fprintf(stderr, "  -q # : specify precision in bits of quantized linear-predictor coefficients;\n");
 491         fprintf(stderr, "         0 => let encoder decide (min is %u, default is -q 0)\n", FLAC__MIN_QLP_COEFF_PRECISION);
 492         fprintf(stderr, "  -r [#,]# : [min,]max residual partition order (# is 0..16; min defaults to 0;\n");
 493         fprintf(stderr, "         default is -r 0; above 4 doesn't usually help much)\n");
 494         fprintf(stderr, "  -R # : Rice parameter search distance (# is 0..32; above 2 doesn't help much)\n");
 495         fprintf(stderr, "  -V   : verify a correct encoding by decoding the output in parallel and\n");
 496         fprintf(stderr, "         comparing to the original\n");
 497         fprintf(stderr, "  -S-, -m-, -M-, -e-, -p-, -V-, --delete-input-file-, --lax- can all be used to\n");
 498         fprintf(stderr, "  turn off a particular option\n");
 499         fprintf(stderr, "format options:\n");
 500         fprintf(stderr, "  -fb | -fl : big-endian | little-endian byte order\n");
 501         fprintf(stderr, "  -fc channels\n");
 502         fprintf(stderr, "  -fp bits_per_sample\n");
 503         fprintf(stderr, "  -fs sample_rate : in Hz\n");
 504         fprintf(stderr, "  -fu : unsigned samples (default is signed)\n");
 505         fprintf(stderr, "  -fr : force to raw format (even if filename ends in .wav)\n");
 506         fprintf(stderr, "  -fw : force to RIFF WAVE\n");
 507         return 1;
 508 }
 509
 510 int encode_file(const char *infilename, const char *forced_outfilename)
 511 {
 512         FILE *encode_infile;
 513         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 514         char *p;
 515         byte lookahead[12];
 516         unsigned lookahead_length = 0;
 517         int retval;
 518         long infilesize;
 519
 520         if(0 == strcmp(infilename, "-")) {
 521                 infilesize = -1;
 522                 encode_infile = stdin;
 523         }
 524         else {
 525                 infilesize = flac__file_get_filesize(infilename);
 526                 if(0 == (encode_infile = fopen(infilename, "rb"))) {
 527                         fprintf(stderr, "ERROR: can't open input file %s\n", infilename);
 528                         return 1;
 529                 }
 530         }
 531
 532         if(verbose)
 533                 fprintf(stderr, "%s:\n", infilename);
 534
 535         if(format_is_wave < 0) {
 536                 /* first set format based on name */
 537                 if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".wav"))
 538                         format_is_wave = true;
 539                 else
 540                         format_is_wave = false;
 541
 542                 /* attempt to guess the file type based on the first 12 bytes */
 543                 if((lookahead_length = fread(lookahead, 1, 12, encode_infile)) < 12) {
 544                         if(format_is_wave)
 545                                 fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 546                         format_is_wave = false;
 547                 }
 548                 else {
 549                         if(strncmp(lookahead, "RIFF", 4) || strncmp(lookahead+8, "WAVE", 4)) {
 550                                 if(format_is_wave)
 551                                         fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
 552                                 format_is_wave = false;
 553                         }
 554                         else
 555                                 format_is_wave = true;
 556                 }
 557         }
 558
 559         if(!format_is_wave) {
 560                 if(format_is_big_endian < 0 || format_channels < 0 || format_bps < 0 || format_sample_rate < 0)
 561                         return usage("ERROR: for encoding a raw file you must specify { -fb or -fl }, -fc, -fp, and -fs\n");
 562         }
 563
 564         if(encode_infile == stdin || force_to_stdout)
 565                 strcpy(outfilename, "-");
 566         else {
 567                 strcpy(outfilename, infilename);
 568                 if(0 == (p = strrchr(outfilename, '.')))
 569                         strcat(outfilename, ".flac");
 570                 else {
 571                         if(0 == strcmp(p, ".flac"))
 572                                 strcpy(p, "_new.flac");
 573                         else
 574                                 strcpy(p, ".flac");
 575                 }
 576         }
 577         if(0 == forced_outfilename)
 578                 forced_outfilename = outfilename;
 579         if(0 != cmdline_forced_outfilename)
 580                 forced_outfilename = cmdline_forced_outfilename;
 581
 582         if(format_is_wave)
 583                 retval = flac__encode_wav(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points);
 584         else
 585                 retval = flac__encode_raw(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points, format_is_big_endian, format_is_unsigned_samples, format_channels, format_bps, format_sample_rate);
 586
 587         if(retval == 0 && strcmp(infilename, "-")) {
 588                 if(strcmp(forced_outfilename, "-"))
 589                         flac__file_copy_metadata(infilename, forced_outfilename);
 590                 if(delete_input)
 591                         unlink(infilename);
 592         }
 593
 594         return retval;
 595 }
 596
 597 int decode_file(const char *infilename, const char *forced_outfilename)
 598 {
 599         static const char *suffixes[] = { ".wav", ".raw", ".ana" };
 600         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
 601         char *p;
 602         int retval;
 603
 604         if(!test_only && !analyze) {
 605                 if(format_is_wave < 0) {
 606                         format_is_wave = true;
 607                 }
 608                 if(!format_is_wave) {
 609                         if(format_is_big_endian < 0)
 610                                 return usage("ERROR: for decoding to a raw file you must specify -fb or -fl\n");
 611                 }
 612         }
 613
 614         if(0 == strcmp(infilename, "-") || force_to_stdout)
 615                 strcpy(outfilename, "-");
 616         else {
 617                 const char *suffix = suffixes[analyze? 2 : format_is_wave? 0 : 1];
 618                 strcpy(outfilename, infilename);
 619                 if(0 == (p = strrchr(outfilename, '.')))
 620                         strcat(outfilename, suffix);
 621                 else {
 622                         if(0 == strcmp(p, suffix)) {
 623                                 strcpy(p, "_new");
 624                                 strcat(p, suffix);
 625                         }
 626                         else
 627                                 strcpy(p, suffix);
 628                 }
 629         }
 630         if(0 == forced_outfilename)
 631                 forced_outfilename = outfilename;
 632         if(0 != cmdline_forced_outfilename)
 633                 forced_outfilename = cmdline_forced_outfilename;
 634
 635         if(format_is_wave)
 636                 retval = flac__decode_wav(infilename, test_only? 0 : forced_outfilename, analyze, aopts, verbose, skip);
 637         else
 638                 retval = flac__decode_raw(infilename, test_only? 0 : forced_outfilename, analyze, aopts, verbose, skip, format_is_big_endian, format_is_unsigned_samples);
 639
 640         if(retval == 0 && strcmp(infilename, "-")) {
 641                 if(strcmp(forced_outfilename, "-"))
 642                         flac__file_copy_metadata(infilename, forced_outfilename);
 643                 if(delete_input)
 644                         unlink(infilename);
 645         }
 646
 647         return retval;
 648 }