src/flac/decode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002,2003,2004  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 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #if defined _WIN32 && !defined __CYGWIN__
  24 /* where MSVC puts unlink() */
  25 # include <io.h>
  26 #else
  27 # include <unistd.h>
  28 #endif
  29 #include <math.h> /* for floor() */
  30 #include <stdio.h> /* for FILE et al. */
  31 #include <string.h> /* for strcmp() */
  32 #include "FLAC/all.h"
  33 #include "share/grabbag.h"
  34 #include "share/replaygain_synthesis.h"
  35 #include "decode.h"
  36
  37 #ifdef FLAC__HAS_OGG
  38 #include "OggFLAC/file_decoder.h"
  39 #endif
  40
  41 typedef struct {
  42 #ifdef FLAC__HAS_OGG
  43         FLAC__bool is_ogg;
  44 #endif
  45
  46         FLAC__bool verbose;
  47         FLAC__bool silent;
  48         FLAC__bool is_aiff_out;
  49         FLAC__bool is_wave_out;
  50         FLAC__bool continue_through_decode_errors;
  51
  52         struct {
  53                 replaygain_synthesis_spec_t spec;
  54                 FLAC__bool apply; /* 'spec.apply' is just a request; this 'apply' means we actually parsed the RG tags and are ready to go */
  55                 double scale;
  56                 DitherContext dither_context;
  57         } replaygain;
  58
  59         FLAC__bool test_only;
  60         FLAC__bool analysis_mode;
  61         analysis_options aopts;
  62         utils__SkipUntilSpecification *skip_specification;
  63         utils__SkipUntilSpecification *until_specification; /* a canonicalized value of 0 mean end-of-stream (i.e. --until=-0) */
  64         utils__CueSpecification *cue_specification;
  65
  66         const char *inbasefilename;
  67         const char *outfilename;
  68
  69         FLAC__uint64 samples_processed;
  70         unsigned frame_counter;
  71         FLAC__bool abort_flag;
  72         FLAC__bool aborting_due_to_until; /* true if we intentionally abort decoding prematurely because we hit the --until point */
  73
  74         struct {
  75                 FLAC__bool needs_fixup;
  76                 unsigned riff_offset; /* or FORM offset for AIFF */
  77                 unsigned data_offset; /* or SSND offset for AIFF */
  78                 unsigned frames_offset; /* AIFF only */
  79         } wave_chunk_size_fixup;
  80
  81         FLAC__bool is_big_endian;
  82         FLAC__bool is_unsigned_samples;
  83         FLAC__uint64 total_samples;
  84         unsigned bps;
  85         unsigned channels;
  86         unsigned sample_rate;
  87
  88         union {
  89                 union {
  90                         FLAC__FileDecoder *file;
  91                 } flac;
  92 #ifdef FLAC__HAS_OGG
  93                 union {
  94                         OggFLAC__FileDecoder *file;
  95                 } ogg;
  96 #endif
  97         } decoder;
  98
  99         FILE *fout;
 100 } DecoderSession;
 101
 102
 103 static FLAC__bool is_big_endian_host_;
 104
 105
 106 /*
 107  * local routines
 108  */
 109 static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool verbose, FLAC__bool silent, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool continue_through_decode_errors, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, const char *infilename, const char *outfilename);
 110 static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
 111 static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, decode_options_t decode_options, const char *infilename);
 112 static FLAC__bool DecoderSession_process(DecoderSession *d);
 113 static int DecoderSession_finish_ok(DecoderSession *d);
 114 static int DecoderSession_finish_error(DecoderSession *d);
 115 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input, FLAC__bool silent);
 116 static FLAC__bool write_necessary_headers(DecoderSession *decoder_session);
 117 static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val);
 118 static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val);
 119 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 120 static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val);
 121 static FLAC__bool write_sane_extended(FILE *f, unsigned val);
 122 static FLAC__bool fixup_wave_chunk_size(const char *outfilename, FLAC__bool is_wave_out, unsigned riff_offset, unsigned data_offset, unsigned frames_offset, FLAC__uint32 total_samples, unsigned channels, unsigned bps, FLAC__bool silent);
 123 /*
 124  * We use 'void *' so that we can use the same callbacks for the
 125  * FLAC__StreamDecoder and FLAC__FileDecoder.  The 'decoder' argument is
 126  * actually never used in the callbacks.
 127  */
 128 static FLAC__StreamDecoderWriteStatus write_callback(const void *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 129 static void metadata_callback(const void *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 130 static void error_callback(const void *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 131 static void print_error_with_state(const DecoderSession *d, const char *message);
 132 static void print_stats(const DecoderSession *decoder_session);
 133
 134
 135 /*
 136  * public routines
 137  */
 138 int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 139 {
 140         DecoderSession decoder_session;
 141
 142         if(!
 143                 DecoderSession_construct(
 144                         &decoder_session,
 145 #ifdef FLAC__HAS_OGG
 146                         options.common.is_ogg,
 147 #else
 148                         /*is_ogg=*/false,
 149 #endif
 150                         options.common.verbose,
 151                         options.common.silent,
 152                         /*is_aiff_out=*/true,
 153                         /*is_wave_out=*/false,
 154                         options.common.continue_through_decode_errors,
 155                         options.common.replaygain_synthesis_spec,
 156                         analysis_mode,
 157                         aopts,
 158                         &options.common.skip_specification,
 159                         &options.common.until_specification,
 160                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 161                         infilename,
 162                         outfilename
 163                 )
 164         )
 165                 return 1;
 166
 167         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 168                 return DecoderSession_finish_error(&decoder_session);
 169
 170         if(!DecoderSession_process(&decoder_session))
 171                 return DecoderSession_finish_error(&decoder_session);
 172
 173         return DecoderSession_finish_ok(&decoder_session);
 174 }
 175
 176 int flac__decode_wav(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 177 {
 178         DecoderSession decoder_session;
 179
 180         if(!
 181                 DecoderSession_construct(
 182                         &decoder_session,
 183 #ifdef FLAC__HAS_OGG
 184                         options.common.is_ogg,
 185 #else
 186                         /*is_ogg=*/false,
 187 #endif
 188                         options.common.verbose,
 189                         options.common.silent,
 190                         /*is_aiff_out=*/false,
 191                         /*is_wave_out=*/true,
 192                         options.common.continue_through_decode_errors,
 193                         options.common.replaygain_synthesis_spec,
 194                         analysis_mode,
 195                         aopts,
 196                         &options.common.skip_specification,
 197                         &options.common.until_specification,
 198                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 199                         infilename,
 200                         outfilename
 201                 )
 202         )
 203                 return 1;
 204
 205         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 206                 return DecoderSession_finish_error(&decoder_session);
 207
 208         if(!DecoderSession_process(&decoder_session))
 209                 return DecoderSession_finish_error(&decoder_session);
 210
 211         return DecoderSession_finish_ok(&decoder_session);
 212 }
 213
 214 int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, raw_decode_options_t options)
 215 {
 216         DecoderSession decoder_session;
 217
 218         decoder_session.is_big_endian = options.is_big_endian;
 219         decoder_session.is_unsigned_samples = options.is_unsigned_samples;
 220
 221         if(!
 222                 DecoderSession_construct(
 223                         &decoder_session,
 224 #ifdef FLAC__HAS_OGG
 225                         options.common.is_ogg,
 226 #else
 227                         /*is_ogg=*/false,
 228 #endif
 229                         options.common.verbose,
 230                         options.common.silent,
 231                         /*is_aiff_out=*/false,
 232                         /*is_wave_out=*/false,
 233                         options.common.continue_through_decode_errors,
 234                         options.common.replaygain_synthesis_spec,
 235                         analysis_mode,
 236                         aopts,
 237                         &options.common.skip_specification,
 238                         &options.common.until_specification,
 239                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 240                         infilename,
 241                         outfilename
 242                 )
 243         )
 244                 return 1;
 245
 246         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 247                 return DecoderSession_finish_error(&decoder_session);
 248
 249         if(!DecoderSession_process(&decoder_session))
 250                 return DecoderSession_finish_error(&decoder_session);
 251
 252         return DecoderSession_finish_ok(&decoder_session);
 253 }
 254
 255 FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool verbose, FLAC__bool silent, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool continue_through_decode_errors, replaygain_synthesis_spec_t replaygain_synthesis_spec, FLAC__bool analysis_mode, analysis_options aopts, utils__SkipUntilSpecification *skip_specification, utils__SkipUntilSpecification *until_specification, utils__CueSpecification *cue_specification, const char *infilename, const char *outfilename)
 256 {
 257 #ifdef FLAC__HAS_OGG
 258         d->is_ogg = is_ogg;
 259 #else
 260         (void)is_ogg;
 261 #endif
 262
 263         d->verbose = verbose;
 264         d->silent = silent;
 265         d->is_aiff_out = is_aiff_out;
 266         d->is_wave_out = is_wave_out;
 267         d->continue_through_decode_errors = continue_through_decode_errors;
 268         d->replaygain.spec = replaygain_synthesis_spec;
 269         d->replaygain.apply = false;
 270         d->replaygain.scale = 0.0;
 271         /* d->replaygain.dither_context gets initialized later once we know the sample resolution */
 272         d->test_only = (0 == outfilename);
 273         d->analysis_mode = analysis_mode;
 274         d->aopts = aopts;
 275         d->skip_specification = skip_specification;
 276         d->until_specification = until_specification;
 277         d->cue_specification = cue_specification;
 278
 279         d->inbasefilename = grabbag__file_get_basename(infilename);
 280         d->outfilename = outfilename;
 281
 282         d->samples_processed = 0;
 283         d->frame_counter = 0;
 284         d->abort_flag = false;
 285         d->aborting_due_to_until = false;
 286
 287         d->wave_chunk_size_fixup.needs_fixup = false;
 288
 289         d->decoder.flac.file = 0;
 290 #ifdef FLAC__HAS_OGG
 291         d->decoder.ogg.file = 0;
 292 #endif
 293
 294         d->fout = 0; /* initialized with an open file later if necessary */
 295
 296         FLAC__ASSERT(!(d->test_only && d->analysis_mode));
 297
 298         if(!d->test_only) {
 299                 if(0 == strcmp(outfilename, "-")) {
 300                         d->fout = grabbag__file_get_binary_stdout();
 301                 }
 302                 else {
 303                         if(0 == (d->fout = fopen(outfilename, "wb"))) {
 304                                 if(!d->silent) fprintf(stderr, "%s: ERROR: can't open output file %s\n", d->inbasefilename, outfilename);
 305                                 DecoderSession_destroy(d, /*error_occurred=*/true);
 306                                 return false;
 307                         }
 308                 }
 309         }
 310
 311         if(analysis_mode)
 312                 flac__analyze_init(aopts);
 313
 314         return true;
 315 }
 316
 317 void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred)
 318 {
 319         if(0 != d->fout && d->fout != stdout) {
 320                 fclose(d->fout);
 321                 if(error_occurred)
 322                         unlink(d->outfilename);
 323         }
 324 }
 325
 326 FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, decode_options_t decode_options, const char *infilename)
 327 {
 328         FLAC__uint32 test = 1;
 329
 330         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
 331
 332 #ifdef FLAC__HAS_OGG
 333         if(decoder_session->is_ogg) {
 334                 decoder_session->decoder.ogg.file = OggFLAC__file_decoder_new();
 335
 336                 if(0 == decoder_session->decoder.ogg.file) {
 337                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 338                         return false;
 339                 }
 340
 341                 OggFLAC__file_decoder_set_md5_checking(decoder_session->decoder.ogg.file, true);
 342                 OggFLAC__file_decoder_set_filename(decoder_session->decoder.ogg.file, infilename);
 343                 if(!decode_options.use_first_serial_number)
 344                         OggFLAC__file_decoder_set_serial_number(decoder_session->decoder.ogg.file, decode_options.serial_number);
 345                 if (0 != decoder_session->cue_specification)
 346                         OggFLAC__file_decoder_set_metadata_respond(decoder_session->decoder.ogg.file, FLAC__METADATA_TYPE_CUESHEET);
 347                 if (decoder_session->replaygain.spec.apply)
 348                         OggFLAC__file_decoder_set_metadata_respond(decoder_session->decoder.ogg.file, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 349
 350                 /*
 351                  * The three ugly casts here are to 'downcast' the 'void *' argument of
 352                  * the callback down to 'OggFLAC__FileDecoder *'.  In C++ this would be
 353                  * unnecessary but here the cast makes the C compiler happy.
 354                  */
 355                 OggFLAC__file_decoder_set_write_callback(decoder_session->decoder.ogg.file, (FLAC__StreamDecoderWriteStatus (*)(const OggFLAC__FileDecoder *, const FLAC__Frame *, const FLAC__int32 * const [], void *))write_callback);
 356                 OggFLAC__file_decoder_set_metadata_callback(decoder_session->decoder.ogg.file, (void (*)(const OggFLAC__FileDecoder *, const FLAC__StreamMetadata *, void *))metadata_callback);
 357                 OggFLAC__file_decoder_set_error_callback(decoder_session->decoder.ogg.file, (void (*)(const OggFLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *))error_callback);
 358                 OggFLAC__file_decoder_set_client_data(decoder_session->decoder.ogg.file, decoder_session);
 359
 360                 if(OggFLAC__file_decoder_init(decoder_session->decoder.ogg.file) != OggFLAC__FILE_DECODER_OK) {
 361                         print_error_with_state(decoder_session, "ERROR initializing decoder");
 362                         return false;
 363                 }
 364         }
 365         else
 366 #else
 367         (void)decode_options;
 368 #endif
 369         {
 370                 decoder_session->decoder.flac.file = FLAC__file_decoder_new();
 371
 372                 if(0 == decoder_session->decoder.flac.file) {
 373                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 374                         return false;
 375                 }
 376
 377                 FLAC__file_decoder_set_md5_checking(decoder_session->decoder.flac.file, true);
 378                 FLAC__file_decoder_set_filename(decoder_session->decoder.flac.file, infilename);
 379                 if (0 != decoder_session->cue_specification)
 380                         FLAC__file_decoder_set_metadata_respond(decoder_session->decoder.flac.file, FLAC__METADATA_TYPE_CUESHEET);
 381                 if (decoder_session->replaygain.spec.apply)
 382                         FLAC__file_decoder_set_metadata_respond(decoder_session->decoder.flac.file, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 383                 /*
 384                  * The three ugly casts here are to 'downcast' the 'void *' argument of
 385                  * the callback down to 'FLAC__FileDecoder *'.
 386                  */
 387                 FLAC__file_decoder_set_write_callback(decoder_session->decoder.flac.file, (FLAC__StreamDecoderWriteStatus (*)(const FLAC__FileDecoder *, const FLAC__Frame *, const FLAC__int32 * const [], void *))write_callback);
 388                 FLAC__file_decoder_set_metadata_callback(decoder_session->decoder.flac.file, (void (*)(const FLAC__FileDecoder *, const FLAC__StreamMetadata *, void *))metadata_callback);
 389                 FLAC__file_decoder_set_error_callback(decoder_session->decoder.flac.file, (void (*)(const FLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *))error_callback);
 390                 FLAC__file_decoder_set_client_data(decoder_session->decoder.flac.file, decoder_session);
 391
 392                 if(FLAC__file_decoder_init(decoder_session->decoder.flac.file) != FLAC__FILE_DECODER_OK) {
 393                         print_error_with_state(decoder_session, "ERROR initializing decoder");
 394                         return false;
 395                 }
 396         }
 397
 398         return true;
 399 }
 400
 401 FLAC__bool DecoderSession_process(DecoderSession *d)
 402 {
 403 #ifdef FLAC__HAS_OGG
 404         if(d->is_ogg) {
 405                 if(!OggFLAC__file_decoder_process_until_end_of_metadata(d->decoder.ogg.file)) {
 406                         if(d->verbose) fprintf(stderr, "\n");
 407                         print_error_with_state(d, "ERROR while decoding metadata");
 408                         return false;
 409                 }
 410                 if(OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_OK && OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_END_OF_FILE) {
 411                         if(d->verbose) fprintf(stderr, "\n");
 412                         print_error_with_state(d, "ERROR during metadata decoding");
 413                         return false;
 414                 }
 415         }
 416         else
 417 #endif
 418         {
 419                 if(!FLAC__file_decoder_process_until_end_of_metadata(d->decoder.flac.file)) {
 420                         if(d->verbose) fprintf(stderr, "\n");
 421                         print_error_with_state(d, "ERROR while decoding metadata");
 422                         return false;
 423                 }
 424                 if(FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_OK && FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_END_OF_FILE) {
 425                         if(d->verbose) fprintf(stderr, "\n");
 426                         print_error_with_state(d, "ERROR during metadata decoding");
 427                         return false;
 428                 }
 429         }
 430         if(d->abort_flag)
 431                 return false;
 432
 433         /* write the WAVE/AIFF headers if necessary */
 434         if(!write_necessary_headers(d)) {
 435                 d->abort_flag = true;
 436                 return false;
 437         }
 438
 439         if(d->skip_specification->value.samples > 0) {
 440                 const FLAC__uint64 skip = (FLAC__uint64)d->skip_specification->value.samples;
 441
 442 #ifdef FLAC__HAS_OGG
 443                 if(d->is_ogg) {
 444                         if(!OggFLAC__file_decoder_seek_absolute(d->decoder.ogg.file, skip)) {
 445                                 print_error_with_state(d, "ERROR seeking while skipping bytes");
 446                                 return false;
 447                         }
 448                         if(!OggFLAC__file_decoder_process_until_end_of_file(d->decoder.ogg.file) && !d->aborting_due_to_until) {
 449                                 if(d->verbose) fprintf(stderr, "\n");
 450                                 print_error_with_state(d, "ERROR while decoding frames");
 451                                 return false;
 452                         }
 453                         if(OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_OK && OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_END_OF_FILE && !d->aborting_due_to_until) {
 454                                 if(d->verbose) fprintf(stderr, "\n");
 455                                 print_error_with_state(d, "ERROR during decoding");
 456                                 return false;
 457                         }
 458                 }
 459                 else
 460 #endif
 461                 {
 462                         if(!FLAC__file_decoder_seek_absolute(d->decoder.flac.file, skip)) {
 463                                 print_error_with_state(d, "ERROR seeking while skipping bytes");
 464                                 return false;
 465                         }
 466                         if(!FLAC__file_decoder_process_until_end_of_file(d->decoder.flac.file) && !d->aborting_due_to_until) {
 467                                 if(d->verbose) fprintf(stderr, "\n");
 468                                 print_error_with_state(d, "ERROR while decoding frames");
 469                                 return false;
 470                         }
 471                         if(FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_OK && FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_END_OF_FILE && !d->aborting_due_to_until) {
 472                                 if(d->verbose) fprintf(stderr, "\n");
 473                                 print_error_with_state(d, "ERROR during decoding");
 474                                 return false;
 475                         }
 476                 }
 477         }
 478         else {
 479 #ifdef FLAC__HAS_OGG
 480                 if(d->is_ogg) {
 481                         if(!OggFLAC__file_decoder_process_until_end_of_file(d->decoder.ogg.file) && !d->aborting_due_to_until) {
 482                                 if(d->verbose) fprintf(stderr, "\n");
 483                                 print_error_with_state(d, "ERROR while decoding data");
 484                                 return false;
 485                         }
 486                         if(OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_OK && OggFLAC__file_decoder_get_state(d->decoder.ogg.file) != OggFLAC__FILE_DECODER_END_OF_FILE && !d->aborting_due_to_until) {
 487                                 if(d->verbose) fprintf(stderr, "\n");
 488                                 print_error_with_state(d, "ERROR during decoding");
 489                                 return false;
 490                         }
 491                 }
 492                 else
 493 #endif
 494                 {
 495                         if(!FLAC__file_decoder_process_until_end_of_file(d->decoder.flac.file) && !d->aborting_due_to_until) {
 496                                 if(d->verbose) fprintf(stderr, "\n");
 497                                 print_error_with_state(d, "ERROR while decoding data");
 498                                 return false;
 499                         }
 500                         if(FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_OK && FLAC__file_decoder_get_state(d->decoder.flac.file) != FLAC__FILE_DECODER_END_OF_FILE && !d->aborting_due_to_until) {
 501                                 if(d->verbose) fprintf(stderr, "\n");
 502                                 print_error_with_state(d, "ERROR during decoding");
 503                                 return false;
 504                         }
 505                 }
 506         }
 507
 508         if(d->is_aiff_out && ((d->total_samples * d->channels * ((d->bps+7)/8)) & 1)) {
 509                 if(flac__utils_fwrite("\000", 1, 1, d->fout) != 1) {
 510                         print_error_with_state(d, "ERROR writing pad byte to AIFF SSND chunk");
 511                         return false;
 512                 }
 513         }
 514
 515         return true;
 516 }
 517
 518 int DecoderSession_finish_ok(DecoderSession *d)
 519 {
 520         FLAC__bool md5_failure = false;
 521
 522 #ifdef FLAC__HAS_OGG
 523         if(d->is_ogg) {
 524                 if(d->decoder.ogg.file) {
 525                         md5_failure = !OggFLAC__file_decoder_finish(d->decoder.ogg.file) && !d->aborting_due_to_until;
 526                         print_stats(d);
 527                         OggFLAC__file_decoder_delete(d->decoder.ogg.file);
 528                 }
 529         }
 530         else
 531 #endif
 532         {
 533                 if(d->decoder.flac.file) {
 534                         md5_failure = !FLAC__file_decoder_finish(d->decoder.flac.file) && !d->aborting_due_to_until;
 535                         print_stats(d);
 536                         FLAC__file_decoder_delete(d->decoder.flac.file);
 537                 }
 538         }
 539         if(d->analysis_mode)
 540                 flac__analyze_finish(d->aopts);
 541         if(md5_failure) {
 542                 if(!d->silent) fprintf(stderr, "\r%s: WARNING, MD5 signature mismatch\n", d->inbasefilename);
 543         }
 544         else {
 545                 if(d->verbose) fprintf(stderr, "\r%s: %s         \n", d->inbasefilename, d->test_only? "ok           ":d->analysis_mode?"done           ":"done");
 546         }
 547         DecoderSession_destroy(d, /*error_occurred=*/false);
 548         if((d->is_wave_out || d->is_aiff_out) && d->wave_chunk_size_fixup.needs_fixup)
 549                 if(!fixup_wave_chunk_size(d->outfilename, d->is_wave_out, d->wave_chunk_size_fixup.riff_offset, d->wave_chunk_size_fixup.data_offset, d->wave_chunk_size_fixup.frames_offset, (FLAC__uint32)d->samples_processed, d->channels, d->bps, d->silent))
 550                         return 1;
 551         return 0;
 552 }
 553
 554 int DecoderSession_finish_error(DecoderSession *d)
 555 {
 556 #ifdef FLAC__HAS_OGG
 557         if(d->is_ogg) {
 558                 if(d->decoder.ogg.file) {
 559                         OggFLAC__file_decoder_finish(d->decoder.ogg.file);
 560                         OggFLAC__file_decoder_delete(d->decoder.ogg.file);
 561                 }
 562         }
 563         else
 564 #endif
 565         {
 566                 if(d->decoder.flac.file) {
 567                         FLAC__file_decoder_finish(d->decoder.flac.file);
 568                         FLAC__file_decoder_delete(d->decoder.flac.file);
 569                 }
 570         }
 571         if(d->analysis_mode)
 572                 flac__analyze_finish(d->aopts);
 573         DecoderSession_destroy(d, /*error_occurred=*/true);
 574         return 1;
 575 }
 576
 577 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input, FLAC__bool silent)
 578 {
 579         /* convert from mm:ss.sss to sample number if necessary */
 580         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
 581
 582         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
 583         if(spec->is_relative && spec->value.samples == 0) {
 584                 spec->is_relative = false;
 585                 return true;
 586         }
 587
 588         /* in any other case the total samples in the input must be known */
 589         if(total_samples_in_input == 0) {
 590                 if(!silent) fprintf(stderr, "%s: ERROR, cannot use --until when FLAC metadata has total sample count of 0\n", inbasefilename);
 591                 return false;
 592         }
 593
 594         FLAC__ASSERT(spec->value_is_samples);
 595
 596         /* convert relative specifications to absolute */
 597         if(spec->is_relative) {
 598                 if(spec->value.samples <= 0)
 599                         spec->value.samples += (FLAC__int64)total_samples_in_input;
 600                 else
 601                         spec->value.samples += skip;
 602                 spec->is_relative = false;
 603         }
 604
 605         /* error check */
 606         if(spec->value.samples < 0) {
 607                 if(!silent) fprintf(stderr, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
 608                 return false;
 609         }
 610         if((FLAC__uint64)spec->value.samples <= skip) {
 611                 if(!silent) fprintf(stderr, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
 612                 return false;
 613         }
 614         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
 615                 if(!silent) fprintf(stderr, "%s: ERROR, --until value is after end of input\n", inbasefilename);
 616                 return false;
 617         }
 618
 619         return true;
 620 }
 621
 622 FLAC__bool write_necessary_headers(DecoderSession *decoder_session)
 623 {
 624         /* write the WAVE/AIFF headers if necessary */
 625         if(!decoder_session->analysis_mode && !decoder_session->test_only && (decoder_session->is_wave_out || decoder_session->is_aiff_out)) {
 626                 const char *fmt_desc = decoder_session->is_wave_out? "WAVE" : "AIFF";
 627                 FLAC__uint64 data_size = decoder_session->total_samples * decoder_session->channels * ((decoder_session->bps+7)/8);
 628                 if(decoder_session->total_samples == 0) {
 629                         if(decoder_session->fout == stdout) {
 630                                 if(!decoder_session->silent) fprintf(stderr, "%s: WARNING, don't have accurate sample count available for %s header.\n", decoder_session->inbasefilename, fmt_desc);
 631                                 if(!decoder_session->silent) fprintf(stderr, "             Generated %s file will have a data chunk size of 0.  Try\n", fmt_desc);
 632                                 if(!decoder_session->silent) fprintf(stderr, "             decoding directly to a file instead.\n");
 633                         }
 634                         else {
 635                                 decoder_session->wave_chunk_size_fixup.needs_fixup = true;
 636                         }
 637                 }
 638                 if(data_size >= 0xFFFFFFDC) {
 639                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR: stream is too big to fit in a single %s file chunk\n", decoder_session->inbasefilename, fmt_desc);
 640                         return false;
 641                 }
 642                 if(decoder_session->is_wave_out) {
 643                         if(flac__utils_fwrite("RIFF", 1, 4, decoder_session->fout) != 4)
 644                                 return false;
 645
 646                         if(decoder_session->wave_chunk_size_fixup.needs_fixup)
 647                                 decoder_session->wave_chunk_size_fixup.riff_offset = ftell(decoder_session->fout);
 648
 649                         if(!write_little_endian_uint32(decoder_session->fout, (FLAC__uint32)(data_size+36))) /* filesize-8 */
 650                                 return false;
 651
 652                         if(flac__utils_fwrite("WAVEfmt ", 1, 8, decoder_session->fout) != 8)
 653                                 return false;
 654
 655                         if(flac__utils_fwrite("\020\000\000\000", 1, 4, decoder_session->fout) != 4) /* chunk size = 16 */
 656                                 return false;
 657
 658                         if(flac__utils_fwrite("\001\000", 1, 2, decoder_session->fout) != 2) /* compression code == 1 */
 659                                 return false;
 660
 661                         if(!write_little_endian_uint16(decoder_session->fout, (FLAC__uint16)(decoder_session->channels)))
 662                                 return false;
 663
 664                         if(!write_little_endian_uint32(decoder_session->fout, decoder_session->sample_rate))
 665                                 return false;
 666
 667                         if(!write_little_endian_uint32(decoder_session->fout, decoder_session->sample_rate * decoder_session->channels * ((decoder_session->bps+7) / 8))) /* @@@ or is it (sample_rate*channels*bps) / 8 ??? */
 668                                 return false;
 669
 670                         if(!write_little_endian_uint16(decoder_session->fout, (FLAC__uint16)(decoder_session->channels * ((decoder_session->bps+7) / 8)))) /* block align */
 671                                 return false;
 672
 673                         if(!write_little_endian_uint16(decoder_session->fout, (FLAC__uint16)(decoder_session->bps))) /* bits per sample */
 674                                 return false;
 675
 676                         if(flac__utils_fwrite("data", 1, 4, decoder_session->fout) != 4)
 677                                 return false;
 678
 679                         if(decoder_session->wave_chunk_size_fixup.needs_fixup)
 680                                 decoder_session->wave_chunk_size_fixup.data_offset = ftell(decoder_session->fout);
 681
 682                         if(!write_little_endian_uint32(decoder_session->fout, (FLAC__uint32)data_size)) /* data size */
 683                                 return false;
 684                 }
 685                 else {
 686                         const FLAC__uint32 aligned_data_size = (FLAC__uint32)((data_size+1) & (~1U));
 687
 688                         if(flac__utils_fwrite("FORM", 1, 4, decoder_session->fout) != 4)
 689                                 return false;
 690
 691                         if(decoder_session->wave_chunk_size_fixup.needs_fixup)
 692                                 decoder_session->wave_chunk_size_fixup.riff_offset = ftell(decoder_session->fout);
 693
 694                         if(!write_big_endian_uint32(decoder_session->fout, (FLAC__uint32)(aligned_data_size+46))) /* filesize-8 */
 695                                 return false;
 696
 697                         if(flac__utils_fwrite("AIFFCOMM", 1, 8, decoder_session->fout) != 8)
 698                                 return false;
 699
 700                         if(flac__utils_fwrite("\000\000\000\022", 1, 4, decoder_session->fout) != 4) /* chunk size = 18 */
 701                                 return false;
 702
 703                         if(!write_big_endian_uint16(decoder_session->fout, (FLAC__uint16)(decoder_session->channels)))
 704                                 return false;
 705
 706                         if(decoder_session->wave_chunk_size_fixup.needs_fixup)
 707                                 decoder_session->wave_chunk_size_fixup.frames_offset = ftell(decoder_session->fout);
 708
 709                         if(!write_big_endian_uint32(decoder_session->fout, (FLAC__uint32)decoder_session->total_samples))
 710                                 return false;
 711
 712                         if(!write_big_endian_uint16(decoder_session->fout, (FLAC__uint16)(decoder_session->bps)))
 713                                 return false;
 714
 715                         if(!write_sane_extended(decoder_session->fout, decoder_session->sample_rate))
 716                                 return false;
 717
 718                         if(flac__utils_fwrite("SSND", 1, 4, decoder_session->fout) != 4)
 719                                 return false;
 720
 721                         if(decoder_session->wave_chunk_size_fixup.needs_fixup)
 722                                 decoder_session->wave_chunk_size_fixup.data_offset = ftell(decoder_session->fout);
 723
 724                         if(!write_big_endian_uint32(decoder_session->fout, (FLAC__uint32)data_size+8)) /* data size */
 725                                 return false;
 726
 727                         if(!write_big_endian_uint32(decoder_session->fout, 0/*offset*/))
 728                                 return false;
 729
 730                         if(!write_big_endian_uint32(decoder_session->fout, 0/*block_size*/))
 731                                 return false;
 732                 }
 733         }
 734
 735         return true;
 736 }
 737
 738 FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val)
 739 {
 740         FLAC__byte *b = (FLAC__byte*)(&val);
 741         if(is_big_endian_host_) {
 742                 FLAC__byte tmp;
 743                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 744         }
 745         return flac__utils_fwrite(b, 1, 2, f) == 2;
 746 }
 747
 748 FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val)
 749 {
 750         FLAC__byte *b = (FLAC__byte*)(&val);
 751         if(is_big_endian_host_) {
 752                 FLAC__byte tmp;
 753                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 754                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 755         }
 756         return flac__utils_fwrite(b, 1, 4, f) == 4;
 757 }
 758
 759 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
 760 {
 761         FLAC__byte *b = (FLAC__byte*)(&val);
 762         if(!is_big_endian_host_) {
 763                 FLAC__byte tmp;
 764                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 765         }
 766         return flac__utils_fwrite(b, 1, 2, f) == 2;
 767 }
 768
 769 FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val)
 770 {
 771         FLAC__byte *b = (FLAC__byte*)(&val);
 772         if(!is_big_endian_host_) {
 773                 FLAC__byte tmp;
 774                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 775                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 776         }
 777         return flac__utils_fwrite(b, 1, 4, f) == 4;
 778 }
 779
 780 FLAC__bool write_sane_extended(FILE *f, unsigned val)
 781         /* Write to 'f' a SANE extended representation of 'val'.  Return false if
 782         * the write succeeds; return true otherwise.
 783         *
 784         * SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
 785         * of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
 786         * representations, it does not imply a 1 above the MSB of the significand.
 787         *
 788         * Preconditions:
 789         *  val!=0U
 790         */
 791 {
 792         unsigned int shift, exponent;
 793
 794         FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */
 795
 796         for(shift= 0U; (val>>(31-shift))==0U; ++shift)
 797                 ;
 798         val<<= shift;
 799         exponent= 63U-(shift+32U); /* add 32 for unused second word */
 800
 801         if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
 802                 return false;
 803         if(!write_big_endian_uint32(f, val))
 804                 return false;
 805         if(!write_big_endian_uint32(f, 0)) /* unused second word */
 806                 return false;
 807
 808         return true;
 809 }
 810
 811 FLAC__bool fixup_wave_chunk_size(const char *outfilename, FLAC__bool is_wave_out, unsigned riff_offset, unsigned data_offset, unsigned frames_offset, FLAC__uint32 total_samples, unsigned channels, unsigned bps, FLAC__bool silent)
 812 {
 813         const char *fmt_desc = (is_wave_out? "WAVE" : "AIFF");
 814         FLAC__bool (*write_it)(FILE *, FLAC__uint32) = (is_wave_out? write_little_endian_uint32 : write_big_endian_uint32);
 815         FILE *f = fopen(outfilename, "r+b");
 816         FLAC__uint32 data_size, aligned_data_size;
 817
 818         if(0 == f) {
 819                 if(!silent) fprintf(stderr, "ERROR, couldn't open file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 820                 return false;
 821         }
 822
 823         data_size = aligned_data_size = total_samples * channels * ((bps+7)/8);
 824         if(!is_wave_out && (aligned_data_size & 1))
 825                 aligned_data_size++;
 826
 827         if(fseek(f, riff_offset, SEEK_SET) < 0) {
 828                 if(!silent) fprintf(stderr, "ERROR, couldn't seek in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 829                 fclose(f);
 830                 return false;
 831         }
 832         if(!write_it(f, aligned_data_size + (is_wave_out? 36 : 46))) {
 833                 if(!silent) fprintf(stderr, "ERROR, couldn't write size in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 834                 fclose(f);
 835                 return false;
 836         }
 837         if(!is_wave_out) {
 838                 if(fseek(f, frames_offset, SEEK_SET) < 0) {
 839                         if(!silent) fprintf(stderr, "ERROR, couldn't seek in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 840                         fclose(f);
 841                         return false;
 842                 }
 843                 if(!write_it(f, total_samples)) {
 844                         if(!silent) fprintf(stderr, "ERROR, couldn't write size in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 845                         fclose(f);
 846                         return false;
 847                 }
 848         }
 849         if(fseek(f, data_offset, SEEK_SET) < 0) {
 850                 if(!silent) fprintf(stderr, "ERROR, couldn't seek in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 851                 fclose(f);
 852                 return false;
 853         }
 854         if(!write_it(f, data_size + (is_wave_out? 0 : 8))) {
 855                 if(!silent) fprintf(stderr, "ERROR, couldn't write size in file %s while fixing up %s chunk size\n", outfilename, fmt_desc);
 856                 fclose(f);
 857                 return false;
 858         }
 859         fclose(f);
 860         return true;
 861 }
 862
 863 FLAC__StreamDecoderWriteStatus write_callback(const void *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 864 {
 865         DecoderSession *decoder_session = (DecoderSession*)client_data;
 866         FILE *fout = decoder_session->fout;
 867         const unsigned bps = frame->header.bits_per_sample, channels = frame->header.channels;
 868         FLAC__bool is_big_endian = (decoder_session->is_aiff_out? true : (decoder_session->is_wave_out? false : decoder_session->is_big_endian));
 869         FLAC__bool is_unsigned_samples = (decoder_session->is_aiff_out? false : (decoder_session->is_wave_out? bps<=8 : decoder_session->is_unsigned_samples));
 870         unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
 871         static FLAC__int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * sizeof(FLAC__int32)]; /* WATCHOUT: can be up to 2 megs */
 872         FLAC__uint8  *u8buffer  = (FLAC__uint8  *)s8buffer;
 873         FLAC__int16  *s16buffer = (FLAC__int16  *)s8buffer;
 874         FLAC__uint16 *u16buffer = (FLAC__uint16 *)s8buffer;
 875         FLAC__int32  *s32buffer = (FLAC__int32  *)s8buffer;
 876         FLAC__uint32 *u32buffer = (FLAC__uint32 *)s8buffer;
 877
 878         (void)decoder;
 879
 880         if(decoder_session->abort_flag)
 881                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 882
 883         if(bps != decoder_session->bps) {
 884                 if(!decoder_session->silent) fprintf(stderr, "%s: ERROR, bits-per-sample is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, bps, decoder_session->bps);
 885                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 886         }
 887         if(channels != decoder_session->channels) {
 888                 if(!decoder_session->silent) fprintf(stderr, "%s: ERROR, channels is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, channels, decoder_session->channels);
 889                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 890         }
 891         if(frame->header.sample_rate != decoder_session->sample_rate) {
 892                 if(!decoder_session->silent) fprintf(stderr, "%s: ERROR, sample rate is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, frame->header.sample_rate, decoder_session->sample_rate);
 893                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 894         }
 895
 896         /*
 897          * limit the number of samples to accept based on --until
 898          */
 899         FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
 900         FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
 901         FLAC__ASSERT(!decoder_session->until_specification->is_relative);
 902         FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
 903         if(decoder_session->until_specification->value.samples > 0) {
 904                 const FLAC__uint64 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
 905                 const FLAC__uint64 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
 906                 const FLAC__uint64 input_samples_passed = skip + decoder_session->samples_processed;
 907                 FLAC__ASSERT(until >= input_samples_passed);
 908                 if(input_samples_passed + wide_samples > until)
 909                         wide_samples = (unsigned)(until - input_samples_passed);
 910                 if (wide_samples == 0) {
 911                         decoder_session->abort_flag = true;
 912                         decoder_session->aborting_due_to_until = true;
 913                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 914                 }
 915         }
 916
 917         if(wide_samples > 0) {
 918                 decoder_session->samples_processed += wide_samples;
 919                 decoder_session->frame_counter++;
 920
 921                 if(decoder_session->verbose && !(decoder_session->frame_counter & 0x3f))
 922                         print_stats(decoder_session);
 923
 924                 if(decoder_session->analysis_mode) {
 925                         flac__analyze_frame(frame, decoder_session->frame_counter-1, decoder_session->aopts, fout);
 926                 }
 927                 else if(!decoder_session->test_only) {
 928                         if (decoder_session->replaygain.apply) {
 929                                 const size_t n = FLAC__replaygain_synthesis__apply_gain(
 930                                         u8buffer,
 931                                         !is_big_endian,
 932                                         is_unsigned_samples,
 933                                         buffer,
 934                                         wide_samples,
 935                                         channels,
 936                                         bps, /* source_bps */
 937                                         bps, /* target_bps */
 938                                         decoder_session->replaygain.scale,
 939                                         decoder_session->replaygain.spec.limiter == RGSS_LIMIT__HARD, /* hard_limit */
 940                                         decoder_session->replaygain.spec.noise_shaping != NOISE_SHAPING_NONE, /* do_dithering */
 941                                         &decoder_session->replaygain.dither_context
 942                                 );
 943                                 if(flac__utils_fwrite(u8buffer, 1, n, fout) != n)
 944                                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 945                         }
 946                         else if(bps == 8) {
 947                                 if(is_unsigned_samples) {
 948                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 949                                                 for(channel = 0; channel < channels; channel++, sample++)
 950                                                         u8buffer[sample] = (FLAC__uint8)(buffer[channel][wide_sample] + 0x80);
 951                                 }
 952                                 else {
 953                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 954                                                 for(channel = 0; channel < channels; channel++, sample++)
 955                                                         s8buffer[sample] = (FLAC__int8)(buffer[channel][wide_sample]);
 956                                 }
 957                                 if(flac__utils_fwrite(u8buffer, 1, sample, fout) != sample)
 958                                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 959                         }
 960                         else if(bps == 16) {
 961                                 if(is_unsigned_samples) {
 962                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 963                                                 for(channel = 0; channel < channels; channel++, sample++)
 964                                                         u16buffer[sample] = (FLAC__uint16)(buffer[channel][wide_sample] + 0x8000);
 965                                 }
 966                                 else {
 967                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 968                                                 for(channel = 0; channel < channels; channel++, sample++)
 969                                                         s16buffer[sample] = (FLAC__int16)(buffer[channel][wide_sample]);
 970                                 }
 971                                 if(is_big_endian != is_big_endian_host_) {
 972                                         unsigned char tmp;
 973                                         const unsigned bytes = sample * 2;
 974                                         for(byte = 0; byte < bytes; byte += 2) {
 975                                                 tmp = u8buffer[byte];
 976                                                 u8buffer[byte] = u8buffer[byte+1];
 977                                                 u8buffer[byte+1] = tmp;
 978                                         }
 979                                 }
 980                                 if(flac__utils_fwrite(u16buffer, 2, sample, fout) != sample)
 981                                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 982                         }
 983                         else if(bps == 24) {
 984                                 if(is_unsigned_samples) {
 985                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 986                                                 for(channel = 0; channel < channels; channel++, sample++)
 987                                                         u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
 988                                 }
 989                                 else {
 990                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 991                                                 for(channel = 0; channel < channels; channel++, sample++)
 992                                                         s32buffer[sample] = buffer[channel][wide_sample];
 993                                 }
 994                                 if(is_big_endian != is_big_endian_host_) {
 995                                         unsigned char tmp;
 996                                         const unsigned bytes = sample * 4;
 997                                         for(byte = 0; byte < bytes; byte += 4) {
 998                                                 tmp = u8buffer[byte];
 999                                                 u8buffer[byte] = u8buffer[byte+3];
1000                                                 u8buffer[byte+3] = tmp;
1001                                                 tmp = u8buffer[byte+1];
1002                                                 u8buffer[byte+1] = u8buffer[byte+2];
1003                                                 u8buffer[byte+2] = tmp;
1004                                         }
1005                                 }
1006                                 if(is_big_endian) {
1007                                         unsigned lbyte;
1008                                         const unsigned bytes = sample * 4;
1009                                         for(lbyte = byte = 0; byte < bytes; ) {
1010                                                 byte++;
1011                                                 u8buffer[lbyte++] = u8buffer[byte++];
1012                                                 u8buffer[lbyte++] = u8buffer[byte++];
1013                                                 u8buffer[lbyte++] = u8buffer[byte++];
1014                                         }
1015                                 }
1016                                 else {
1017                                         unsigned lbyte;
1018                                         const unsigned bytes = sample * 4;
1019                                         for(lbyte = byte = 0; byte < bytes; ) {
1020                                                 u8buffer[lbyte++] = u8buffer[byte++];
1021                                                 u8buffer[lbyte++] = u8buffer[byte++];
1022                                                 u8buffer[lbyte++] = u8buffer[byte++];
1023                                                 byte++;
1024                                         }
1025                                 }
1026                                 if(flac__utils_fwrite(u8buffer, 3, sample, fout) != sample)
1027                                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1028                         }
1029                         else {
1030                                 FLAC__ASSERT(0);
1031                         }
1032                 }
1033         }
1034         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
1035 }
1036
1037 void metadata_callback(const void *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1038 {
1039         DecoderSession *decoder_session = (DecoderSession*)client_data;
1040         (void)decoder;
1041         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
1042                 FLAC__uint64 skip, until;
1043                 decoder_session->bps = metadata->data.stream_info.bits_per_sample;
1044                 decoder_session->channels = metadata->data.stream_info.channels;
1045                 decoder_session->sample_rate = metadata->data.stream_info.sample_rate;
1046
1047                 flac__utils_canonicalize_skip_until_specification(decoder_session->skip_specification, decoder_session->sample_rate);
1048                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1049                 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
1050
1051                 /* remember, metadata->data.stream_info.total_samples can be 0, meaning 'unknown' */
1052                 if(metadata->data.stream_info.total_samples > 0 && skip >= metadata->data.stream_info.total_samples) {
1053                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR trying to --skip more samples than in stream\n", decoder_session->inbasefilename);
1054                         decoder_session->abort_flag = true;
1055                         return;
1056                 }
1057                 else if(metadata->data.stream_info.total_samples == 0 && skip > 0) {
1058                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR, can't --skip when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1059                         decoder_session->abort_flag = true;
1060                         return;
1061                 }
1062                 FLAC__ASSERT(skip == 0 || 0 == decoder_session->cue_specification);
1063                 decoder_session->total_samples = metadata->data.stream_info.total_samples - skip;
1064
1065                 /* note that we use metadata->data.stream_info.total_samples instead of decoder_session->total_samples */
1066                 if(!canonicalize_until_specification(decoder_session->until_specification, decoder_session->inbasefilename, decoder_session->sample_rate, skip, metadata->data.stream_info.total_samples, decoder_session->silent)) {
1067                         decoder_session->abort_flag = true;
1068                         return;
1069                 }
1070                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1071                 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1072
1073                 if(until > 0) {
1074                         FLAC__ASSERT(decoder_session->total_samples != 0);
1075                         FLAC__ASSERT(0 == decoder_session->cue_specification);
1076                         decoder_session->total_samples -= (metadata->data.stream_info.total_samples - until);
1077                 }
1078
1079                 if(decoder_session->bps != 8 && decoder_session->bps != 16 && decoder_session->bps != 24) {
1080                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR: bits per sample is not 8/16/24\n", decoder_session->inbasefilename);
1081                         decoder_session->abort_flag = true;
1082                         return;
1083                 }
1084         }
1085         else if(metadata->type == FLAC__METADATA_TYPE_CUESHEET) {
1086                 /* remember, at this point, decoder_session->total_samples can be 0, meaning 'unknown' */
1087                 if(decoder_session->total_samples == 0) {
1088                         if(!decoder_session->silent) fprintf(stderr, "%s: ERROR can't use --cue when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1089                         decoder_session->abort_flag = true;
1090                         return;
1091                 }
1092
1093                 flac__utils_canonicalize_cue_specification(decoder_session->cue_specification, &metadata->data.cue_sheet, decoder_session->total_samples, decoder_session->skip_specification, decoder_session->until_specification);
1094
1095                 FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1096                 FLAC__ASSERT(decoder_session->skip_specification->value_is_samples);
1097
1098                 FLAC__ASSERT(!decoder_session->until_specification->is_relative);
1099                 FLAC__ASSERT(decoder_session->until_specification->value_is_samples);
1100
1101                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1102                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1103                 FLAC__ASSERT((FLAC__uint64)decoder_session->until_specification->value.samples <= decoder_session->total_samples);
1104                 FLAC__ASSERT(decoder_session->skip_specification->value.samples <= decoder_session->until_specification->value.samples);
1105
1106                 decoder_session->total_samples = decoder_session->until_specification->value.samples - decoder_session->skip_specification->value.samples;
1107         }
1108         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
1109                 if (decoder_session->replaygain.spec.apply) {
1110                         double gain, peak;
1111                         if (!(decoder_session->replaygain.apply = grabbag__replaygain_load_from_vorbiscomment(metadata, decoder_session->replaygain.spec.use_album_gain, &gain, &peak))) {
1112                                 if(!decoder_session->silent) fprintf(stderr, "%s: WARNING: can't get %s ReplayGain tag\n", decoder_session->inbasefilename, decoder_session->replaygain.spec.use_album_gain? "album":"track");
1113                         }
1114                         else {
1115                                 const char *ls[] = { "no", "peak", "hard" };
1116                                 const char *ns[] = { "no", "low", "medium", "high" };
1117                                 decoder_session->replaygain.scale = grabbag__replaygain_compute_scale_factor(peak, gain, decoder_session->replaygain.spec.preamp, decoder_session->replaygain.spec.limiter == RGSS_LIMIT__PEAK);
1118                                 FLAC__ASSERT(decoder_session->bps > 0 && decoder_session->bps <= 32);
1119                                 FLAC__replaygain_synthesis__init_dither_context(&decoder_session->replaygain.dither_context, decoder_session->bps, decoder_session->replaygain.spec.noise_shaping);
1120                                 if(!decoder_session->silent) fprintf(stderr, "%s: INFO: applying %s ReplayGain (gain=%0.2fdB+preamp=%0.1fdB, %s noise shaping, %s limiting) to output\n", decoder_session->inbasefilename, decoder_session->replaygain.spec.use_album_gain? "album":"track", gain, decoder_session->replaygain.spec.preamp, ns[decoder_session->replaygain.spec.noise_shaping], ls[decoder_session->replaygain.spec.limiter]);
1121                                 if(!decoder_session->silent) fprintf(stderr, "%s: WARNING: applying ReplayGain is not lossless\n", decoder_session->inbasefilename);
1122                         }
1123                 }
1124         }
1125 }
1126
1127 void error_callback(const void *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1128 {
1129         DecoderSession *decoder_session = (DecoderSession*)client_data;
1130         (void)decoder;
1131         if(!decoder_session->silent) fprintf(stderr, "%s: *** Got error code %d:%s\n", decoder_session->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1132         if(!decoder_session->continue_through_decode_errors)
1133                 decoder_session->abort_flag = true;
1134 }
1135
1136 void print_error_with_state(const DecoderSession *d, const char *message)
1137 {
1138         const int ilen = strlen(d->inbasefilename) + 1;
1139
1140         if(d->silent)
1141                 return;
1142
1143         fprintf(stderr, "\n%s: %s\n", d->inbasefilename, message);
1144
1145 #ifdef FLAC__HAS_OGG
1146         if(d->is_ogg) {
1147                 const OggFLAC__FileDecoderState ofd_state = OggFLAC__file_decoder_get_state(d->decoder.ogg.file);
1148                 if(ofd_state != OggFLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR) {
1149                         fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)ofd_state, OggFLAC__FileDecoderStateString[ofd_state]);
1150                 }
1151                 else {
1152                         const OggFLAC__SeekableStreamDecoderState ossd_state = OggFLAC__file_decoder_get_seekable_stream_decoder_state(d->decoder.ogg.file);
1153                         if(ossd_state != OggFLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR) {
1154                                 fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)ossd_state, OggFLAC__SeekableStreamDecoderStateString[ossd_state]);
1155                         }
1156                         else {
1157                                 const OggFLAC__StreamDecoderState osd_state = OggFLAC__file_decoder_get_state(d->decoder.ogg.file);
1158                                 if(osd_state != OggFLAC__STREAM_DECODER_FLAC_STREAM_DECODER_ERROR) {
1159                                         fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)osd_state, OggFLAC__StreamDecoderStateString[osd_state]);
1160                                 }
1161                                 else {
1162                                         const FLAC__StreamDecoderState fsd_state = OggFLAC__file_decoder_get_FLAC_stream_decoder_state(d->decoder.ogg.file);
1163                                         fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)fsd_state, FLAC__StreamDecoderStateString[fsd_state]);
1164                                 }
1165                         }
1166                 }
1167         }
1168         else
1169 #endif
1170         {
1171                 const FLAC__FileDecoderState ffd_state = FLAC__file_decoder_get_state(d->decoder.flac.file);
1172                 if(ffd_state != FLAC__FILE_DECODER_SEEKABLE_STREAM_DECODER_ERROR) {
1173                         fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)ffd_state, FLAC__FileDecoderStateString[ffd_state]);
1174                 }
1175                 else {
1176                         const FLAC__SeekableStreamDecoderState fssd_state = FLAC__file_decoder_get_seekable_stream_decoder_state(d->decoder.flac.file);
1177                         if(fssd_state != FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR) {
1178                                 fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)fssd_state, FLAC__SeekableStreamDecoderStateString[fssd_state]);
1179                         }
1180                         else {
1181                                 const FLAC__StreamDecoderState fsd_state = FLAC__file_decoder_get_stream_decoder_state(d->decoder.flac.file);
1182                                 fprintf(stderr, "%*s state = %d:%s\n", ilen, "", (int)fsd_state, FLAC__StreamDecoderStateString[fsd_state]);
1183                         }
1184                 }
1185         }
1186 }
1187
1188 void print_stats(const DecoderSession *decoder_session)
1189 {
1190         if(decoder_session->verbose) {
1191 #if defined _MSC_VER || defined __MINGW32__
1192                 /* with VC++ you have to spoon feed it the casting */
1193                 const double progress = (double)(FLAC__int64)decoder_session->samples_processed / (double)(FLAC__int64)decoder_session->total_samples * 100.0;
1194 #else
1195                 const double progress = (double)decoder_session->samples_processed / (double)decoder_session->total_samples * 100.0;
1196 #endif
1197                 if(decoder_session->total_samples > 0) {
1198                         fprintf(stderr, "\r%s: %s%u%% complete",
1199                                 decoder_session->inbasefilename,
1200                                 decoder_session->test_only? "testing, " : decoder_session->analysis_mode? "analyzing, " : "",
1201                                 (unsigned)floor(progress + 0.5)
1202                         );
1203                 }
1204                 else {
1205                         fprintf(stderr, "\r%s: %s %u samples",
1206                                 decoder_session->inbasefilename,
1207                                 decoder_session->test_only? "tested" : decoder_session->analysis_mode? "analyzed" : "wrote",
1208                                 (unsigned)decoder_session->samples_processed
1209                         );
1210                 }
1211         }
1212 }