src/flac/decode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006  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 #if 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 #if defined _MSC_VER || defined __MINGW32__
  30 #include <sys/types.h> /* for off_t */
  31 //@@@ [2G limit] hacks for MSVC6
  32 #define fseeko fseek
  33 #define ftello ftell
  34 #endif
  35 #include <errno.h>
  36 #include <math.h> /* for floor() */
  37 #include <stdio.h> /* for FILE etc. */
  38 #include <string.h> /* for strcmp(), strerror() */
  39 #include "FLAC/all.h"
  40 #include "share/grabbag.h"
  41 #include "share/replaygain_synthesis.h"
  42 #include "decode.h"
  43
  44 #ifdef FLAC__HAS_OGG
  45 #include "OggFLAC/file_decoder.h"
  46 #endif
  47
  48 typedef struct {
  49 #ifdef FLAC__HAS_OGG
  50         FLAC__bool is_ogg;
  51 #endif
  52
  53         FLAC__bool is_aiff_out;
  54         FLAC__bool is_wave_out;
  55         FLAC__bool continue_through_decode_errors;
  56
  57         struct {
  58                 replaygain_synthesis_spec_t spec;
  59                 FLAC__bool apply; /* 'spec.apply' is just a request; this 'apply' means we actually parsed the RG tags and are ready to go */
  60                 double scale;
  61                 DitherContext dither_context;
  62         } replaygain;
  63
  64         FLAC__bool test_only;
  65         FLAC__bool analysis_mode;
  66         analysis_options aopts;
  67         utils__SkipUntilSpecification *skip_specification;
  68         utils__SkipUntilSpecification *until_specification; /* a canonicalized value of 0 mean end-of-stream (i.e. --until=-0) */
  69         utils__CueSpecification *cue_specification;
  70
  71         const char *inbasefilename;
  72         const char *outfilename;
  73
  74         FLAC__uint64 samples_processed;
  75         unsigned frame_counter;
  76         FLAC__bool abort_flag;
  77         FLAC__bool aborting_due_to_until; /* true if we intentionally abort decoding prematurely because we hit the --until point */
  78         FLAC__bool aborting_due_to_unparseable; /* true if we abort decoding because we hit an unparseable frame */
  79
  80         FLAC__bool iff_headers_need_fixup;
  81
  82         FLAC__bool is_big_endian;
  83         FLAC__bool is_unsigned_samples;
  84         FLAC__bool got_stream_info;
  85         FLAC__uint64 total_samples;
  86         unsigned bps;
  87         unsigned channels;
  88         unsigned sample_rate;
  89
  90         union {
  91                 union {
  92                         FLAC__FileDecoder *file;
  93                 } flac;
  94 #ifdef FLAC__HAS_OGG
  95                 union {
  96                         OggFLAC__FileDecoder *file;
  97                 } ogg;
  98 #endif
  99         } decoder;
 100
 101         FILE *fout;
 102 } DecoderSession;
 103
 104
 105 static FLAC__bool is_big_endian_host_;
 106
 107
 108 /*
 109  * local routines
 110  */
 111 static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, 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);
 112 static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
 113 static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, decode_options_t decode_options, const char *infilename);
 114 static FLAC__bool DecoderSession_process(DecoderSession *d);
 115 static int DecoderSession_finish_ok(DecoderSession *d);
 116 static int DecoderSession_finish_error(DecoderSession *d);
 117 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input);
 118 static FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples);
 119 static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val);
 120 static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val);
 121 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 122 static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val);
 123 static FLAC__bool write_sane_extended(FILE *f, unsigned val);
 124 static FLAC__bool fixup_iff_headers(DecoderSession *d);
 125 /*
 126  * We use 'void *' so that we can use the same callbacks for the
 127  * FLAC__StreamDecoder and FLAC__FileDecoder.  The 'decoder' argument is
 128  * actually never used in the callbacks.
 129  */
 130 static FLAC__StreamDecoderWriteStatus write_callback(const void *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 131 static void metadata_callback(const void *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 132 static void error_callback(const void *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 133 static void print_error_with_state(const DecoderSession *d, const char *message);
 134 static void print_stats(const DecoderSession *decoder_session);
 135
 136
 137 /*
 138  * public routines
 139  */
 140 int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 141 {
 142         DecoderSession decoder_session;
 143
 144         if(!
 145                 DecoderSession_construct(
 146                         &decoder_session,
 147 #ifdef FLAC__HAS_OGG
 148                         options.common.is_ogg,
 149 #else
 150                         /*is_ogg=*/false,
 151 #endif
 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                         /*is_aiff_out=*/false,
 189                         /*is_wave_out=*/true,
 190                         options.common.continue_through_decode_errors,
 191                         options.common.replaygain_synthesis_spec,
 192                         analysis_mode,
 193                         aopts,
 194                         &options.common.skip_specification,
 195                         &options.common.until_specification,
 196                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 197                         infilename,
 198                         outfilename
 199                 )
 200         )
 201                 return 1;
 202
 203         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 204                 return DecoderSession_finish_error(&decoder_session);
 205
 206         if(!DecoderSession_process(&decoder_session))
 207                 return DecoderSession_finish_error(&decoder_session);
 208
 209         return DecoderSession_finish_ok(&decoder_session);
 210 }
 211
 212 int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, raw_decode_options_t options)
 213 {
 214         DecoderSession decoder_session;
 215
 216         decoder_session.is_big_endian = options.is_big_endian;
 217         decoder_session.is_unsigned_samples = options.is_unsigned_samples;
 218
 219         if(!
 220                 DecoderSession_construct(
 221                         &decoder_session,
 222 #ifdef FLAC__HAS_OGG
 223                         options.common.is_ogg,
 224 #else
 225                         /*is_ogg=*/false,
 226 #endif
 227                         /*is_aiff_out=*/false,
 228                         /*is_wave_out=*/false,
 229                         options.common.continue_through_decode_errors,
 230                         options.common.replaygain_synthesis_spec,
 231                         analysis_mode,
 232                         aopts,
 233                         &options.common.skip_specification,
 234                         &options.common.until_specification,
 235                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 236                         infilename,
 237                         outfilename
 238                 )
 239         )
 240                 return 1;
 241
 242         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 243                 return DecoderSession_finish_error(&decoder_session);
 244
 245         if(!DecoderSession_process(&decoder_session))
 246                 return DecoderSession_finish_error(&decoder_session);
 247
 248         return DecoderSession_finish_ok(&decoder_session);
 249 }
 250
 251 FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, 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)
 252 {
 253 #ifdef FLAC__HAS_OGG
 254         d->is_ogg = is_ogg;
 255 #else
 256         (void)is_ogg;
 257 #endif
 258
 259         d->is_aiff_out = is_aiff_out;
 260         d->is_wave_out = is_wave_out;
 261         d->continue_through_decode_errors = continue_through_decode_errors;
 262         d->replaygain.spec = replaygain_synthesis_spec;
 263         d->replaygain.apply = false;
 264         d->replaygain.scale = 0.0;
 265         /* d->replaygain.dither_context gets initialized later once we know the sample resolution */
 266         d->test_only = (0 == outfilename);
 267         d->analysis_mode = analysis_mode;
 268         d->aopts = aopts;
 269         d->skip_specification = skip_specification;
 270         d->until_specification = until_specification;
 271         d->cue_specification = cue_specification;
 272
 273         d->inbasefilename = grabbag__file_get_basename(infilename);
 274         d->outfilename = outfilename;
 275
 276         d->samples_processed = 0;
 277         d->frame_counter = 0;
 278         d->abort_flag = false;
 279         d->aborting_due_to_until = false;
 280         d->aborting_due_to_unparseable = false;
 281
 282         d->iff_headers_need_fixup = false;
 283
 284         d->total_samples = 0;
 285         d->got_stream_info = false;
 286         d->bps = 0;
 287         d->channels = 0;
 288         d->sample_rate = 0;
 289
 290         d->decoder.flac.file = 0;
 291 #ifdef FLAC__HAS_OGG
 292         d->decoder.ogg.file = 0;
 293 #endif
 294
 295         d->fout = 0; /* initialized with an open file later if necessary */
 296
 297         FLAC__ASSERT(!(d->test_only && d->analysis_mode));
 298
 299         if(!d->test_only) {
 300                 if(0 == strcmp(outfilename, "-")) {
 301                         d->fout = grabbag__file_get_binary_stdout();
 302                 }
 303                 else {
 304                         if(0 == (d->fout = fopen(outfilename, "wb"))) {
 305                                 flac__utils_printf(stderr, 1, "%s: ERROR: can't open output file %s: %s\n", d->inbasefilename, outfilename, strerror(errno));
 306                                 DecoderSession_destroy(d, /*error_occurred=*/true);
 307                                 return false;
 308                         }
 309                 }
 310         }
 311
 312         if(analysis_mode)
 313                 flac__analyze_init(aopts);
 314
 315         return true;
 316 }
 317
 318 void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred)
 319 {
 320         if(0 != d->fout && d->fout != stdout) {
 321                 fclose(d->fout);
 322                 if(error_occurred)
 323                         unlink(d->outfilename);
 324         }
 325 }
 326
 327 FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, decode_options_t decode_options, const char *infilename)
 328 {
 329         FLAC__uint32 test = 1;
 330
 331         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
 332
 333 #ifdef FLAC__HAS_OGG
 334         if(decoder_session->is_ogg) {
 335                 decoder_session->decoder.ogg.file = OggFLAC__file_decoder_new();
 336
 337                 if(0 == decoder_session->decoder.ogg.file) {
 338                         flac__utils_printf(stderr, 1, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 339                         return false;
 340                 }
 341
 342                 OggFLAC__file_decoder_set_md5_checking(decoder_session->decoder.ogg.file, true);
 343                 OggFLAC__file_decoder_set_filename(decoder_session->decoder.ogg.file, infilename);
 344                 if(!decode_options.use_first_serial_number)
 345                         OggFLAC__file_decoder_set_serial_number(decoder_session->decoder.ogg.file, decode_options.serial_number);
 346                 if (0 != decoder_session->cue_specification)
 347                         OggFLAC__file_decoder_set_metadata_respond(decoder_session->decoder.ogg.file, FLAC__METADATA_TYPE_CUESHEET);
 348                 if (decoder_session->replaygain.spec.apply)
 349                         OggFLAC__file_decoder_set_metadata_respond(decoder_session->decoder.ogg.file, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 350
 351                 /*
 352                  * The three ugly casts here are to 'downcast' the 'void *' argument of
 353                  * the callback down to 'OggFLAC__FileDecoder *'.  In C++ this would be
 354                  * unnecessary but here the cast makes the C compiler happy.
 355                  */
 356                 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);
 357                 OggFLAC__file_decoder_set_metadata_callback(decoder_session->decoder.ogg.file, (void (*)(const OggFLAC__FileDecoder *, const FLAC__StreamMetadata *, void *))metadata_callback);
 358                 OggFLAC__file_decoder_set_error_callback(decoder_session->decoder.ogg.file, (void (*)(const OggFLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *))error_callback);
 359                 OggFLAC__file_decoder_set_client_data(decoder_session->decoder.ogg.file, decoder_session);
 360
 361                 if(OggFLAC__file_decoder_init(decoder_session->decoder.ogg.file) != OggFLAC__FILE_DECODER_OK) {
 362                         print_error_with_state(decoder_session, "ERROR initializing decoder");
 363                         return false;
 364                 }
 365         }
 366         else
 367 #else
 368         (void)decode_options;
 369 #endif
 370         {
 371                 decoder_session->decoder.flac.file = FLAC__file_decoder_new();
 372
 373                 if(0 == decoder_session->decoder.flac.file) {
 374                         flac__utils_printf(stderr, 1, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 375                         return false;
 376                 }
 377
 378                 FLAC__file_decoder_set_md5_checking(decoder_session->decoder.flac.file, true);
 379                 FLAC__file_decoder_set_filename(decoder_session->decoder.flac.file, infilename);
 380                 if (0 != decoder_session->cue_specification)
 381                         FLAC__file_decoder_set_metadata_respond(decoder_session->decoder.flac.file, FLAC__METADATA_TYPE_CUESHEET);
 382                 if (decoder_session->replaygain.spec.apply)
 383                         FLAC__file_decoder_set_metadata_respond(decoder_session->decoder.flac.file, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 384                 /*
 385                  * The three ugly casts here are to 'downcast' the 'void *' argument of
 386                  * the callback down to 'FLAC__FileDecoder *'.
 387                  */
 388                 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);
 389                 FLAC__file_decoder_set_metadata_callback(decoder_session->decoder.flac.file, (void (*)(const FLAC__FileDecoder *, const FLAC__StreamMetadata *, void *))metadata_callback);
 390                 FLAC__file_decoder_set_error_callback(decoder_session->decoder.flac.file, (void (*)(const FLAC__FileDecoder *, FLAC__StreamDecoderErrorStatus, void *))error_callback);
 391                 FLAC__file_decoder_set_client_data(decoder_session->decoder.flac.file, decoder_session);
 392
 393                 if(FLAC__file_decoder_init(decoder_session->decoder.flac.file) != FLAC__FILE_DECODER_OK) {
 394                         print_error_with_state(decoder_session, "ERROR initializing decoder");
 395                         return false;
 396                 }
 397         }
 398
 399         return true;
 400 }
 401
 402 FLAC__bool DecoderSession_process(DecoderSession *d)
 403 {
 404 #ifdef FLAC__HAS_OGG
 405         if(d->is_ogg) {
 406                 if(!OggFLAC__file_decoder_process_until_end_of_metadata(d->decoder.ogg.file)) {
 407                         flac__utils_printf(stderr, 2, "\n");
 408                         print_error_with_state(d, "ERROR while decoding metadata");
 409                         return false;
 410                 }
 411                 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) {
 412                         flac__utils_printf(stderr, 2, "\n");
 413                         print_error_with_state(d, "ERROR during metadata decoding");
 414                         if(!d->continue_through_decode_errors)
 415                                 return false;
 416                 }
 417         }
 418         else
 419 #endif
 420         {
 421                 if(!FLAC__file_decoder_process_until_end_of_metadata(d->decoder.flac.file)) {
 422                         flac__utils_printf(stderr, 2, "\n");
 423                         print_error_with_state(d, "ERROR while decoding metadata");
 424                         return false;
 425                 }
 426                 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) {
 427                         flac__utils_printf(stderr, 2, "\n");
 428                         print_error_with_state(d, "ERROR during metadata decoding");
 429                         if(!d->continue_through_decode_errors)
 430                                 return false;
 431                 }
 432         }
 433         if(d->abort_flag)
 434                 return false;
 435
 436         /* write the WAVE/AIFF headers if necessary */
 437         if(!d->analysis_mode && !d->test_only && (d->is_wave_out || d->is_aiff_out)) {
 438                 if(!write_iff_headers(d->fout, d, d->total_samples)) {
 439                         d->abort_flag = true;
 440                         return false;
 441                 }
 442         }
 443
 444         if(d->skip_specification->value.samples > 0) {
 445                 const FLAC__uint64 skip = (FLAC__uint64)d->skip_specification->value.samples;
 446
 447 #ifdef FLAC__HAS_OGG
 448                 if(d->is_ogg) {
 449                         if(!OggFLAC__file_decoder_seek_absolute(d->decoder.ogg.file, skip)) {
 450                                 print_error_with_state(d, "ERROR seeking while skipping bytes");
 451                                 return false;
 452                         }
 453                         if(!OggFLAC__file_decoder_process_until_end_of_file(d->decoder.ogg.file) && !d->aborting_due_to_until) {
 454                                 flac__utils_printf(stderr, 2, "\n");
 455                                 print_error_with_state(d, "ERROR while decoding frames");
 456                                 return false;
 457                         }
 458                         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) {
 459                                 flac__utils_printf(stderr, 2, "\n");
 460                                 print_error_with_state(d, "ERROR during decoding");
 461                                 return false;
 462                         }
 463                 }
 464                 else
 465 #endif
 466                 {
 467                         if(!FLAC__file_decoder_seek_absolute(d->decoder.flac.file, skip)) {
 468                                 print_error_with_state(d, "ERROR seeking while skipping bytes");
 469                                 return false;
 470                         }
 471                         if(!FLAC__file_decoder_process_until_end_of_file(d->decoder.flac.file) && !d->aborting_due_to_until) {
 472                                 flac__utils_printf(stderr, 2, "\n");
 473                                 print_error_with_state(d, "ERROR while decoding frames");
 474                                 return false;
 475                         }
 476                         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) {
 477                                 flac__utils_printf(stderr, 2, "\n");
 478                                 print_error_with_state(d, "ERROR during decoding");
 479                                 return false;
 480                         }
 481                 }
 482         }
 483         else {
 484 #ifdef FLAC__HAS_OGG
 485                 if(d->is_ogg) {
 486                         if(!OggFLAC__file_decoder_process_until_end_of_file(d->decoder.ogg.file) && !d->aborting_due_to_until) {
 487                                 flac__utils_printf(stderr, 2, "\n");
 488                                 print_error_with_state(d, "ERROR while decoding data");
 489                                 return false;
 490                         }
 491                         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) {
 492                                 flac__utils_printf(stderr, 2, "\n");
 493                                 print_error_with_state(d, "ERROR during decoding");
 494                                 return false;
 495                         }
 496                 }
 497                 else
 498 #endif
 499                 {
 500                         if(!FLAC__file_decoder_process_until_end_of_file(d->decoder.flac.file) && !d->aborting_due_to_until) {
 501                                 flac__utils_printf(stderr, 2, "\n");
 502                                 print_error_with_state(d, "ERROR while decoding data");
 503                                 return false;
 504                         }
 505                         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) {
 506                                 flac__utils_printf(stderr, 2, "\n");
 507                                 print_error_with_state(d, "ERROR during decoding");
 508                                 return false;
 509                         }
 510                 }
 511         }
 512
 513         if((d->is_wave_out || d->is_aiff_out) && ((d->total_samples * d->channels * ((d->bps+7)/8)) & 1)) {
 514                 if(flac__utils_fwrite("\000", 1, 1, d->fout) != 1) {
 515                         print_error_with_state(d, d->is_wave_out?
 516                                 "ERROR writing pad byte to WAVE data chunk" :
 517                                 "ERROR writing pad byte to AIFF SSND chunk"
 518                         );
 519                         return false;
 520                 }
 521         }
 522
 523         return true;
 524 }
 525
 526 int DecoderSession_finish_ok(DecoderSession *d)
 527 {
 528         FLAC__bool md5_failure = false;
 529
 530 #ifdef FLAC__HAS_OGG
 531         if(d->is_ogg) {
 532                 if(d->decoder.ogg.file) {
 533                         md5_failure = !OggFLAC__file_decoder_finish(d->decoder.ogg.file) && !d->aborting_due_to_until;
 534                         print_stats(d);
 535                         OggFLAC__file_decoder_delete(d->decoder.ogg.file);
 536                 }
 537         }
 538         else
 539 #endif
 540         {
 541                 if(d->decoder.flac.file) {
 542                         md5_failure = !FLAC__file_decoder_finish(d->decoder.flac.file) && !d->aborting_due_to_until;
 543                         print_stats(d);
 544                         FLAC__file_decoder_delete(d->decoder.flac.file);
 545                 }
 546         }
 547         if(d->analysis_mode)
 548                 flac__analyze_finish(d->aopts);
 549         if(md5_failure) {
 550                 flac__utils_printf(stderr, 1, "\r%s: WARNING, MD5 signature mismatch\n", d->inbasefilename);
 551         }
 552         else if(!d->got_stream_info) {
 553                 flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since there was no STREAMINFO\n", d->inbasefilename);
 554         }
 555         else {
 556                 flac__utils_printf(stderr, 2, "\r%s: %s         \n", d->inbasefilename, d->test_only? "ok           ":d->analysis_mode?"done           ":"done");
 557         }
 558         DecoderSession_destroy(d, /*error_occurred=*/false);
 559         if((d->is_wave_out || d->is_aiff_out) && (d->iff_headers_need_fixup || (!d->got_stream_info && strcmp(d->outfilename, "-"))))
 560                 if(!fixup_iff_headers(d))
 561                         return 1;
 562         return 0;
 563 }
 564
 565 int DecoderSession_finish_error(DecoderSession *d)
 566 {
 567 #ifdef FLAC__HAS_OGG
 568         if(d->is_ogg) {
 569                 if(d->decoder.ogg.file) {
 570                         OggFLAC__file_decoder_finish(d->decoder.ogg.file);
 571                         OggFLAC__file_decoder_delete(d->decoder.ogg.file);
 572                 }
 573         }
 574         else
 575 #endif
 576         {
 577                 if(d->decoder.flac.file) {
 578                         FLAC__file_decoder_finish(d->decoder.flac.file);
 579                         FLAC__file_decoder_delete(d->decoder.flac.file);
 580                 }
 581         }
 582         if(d->analysis_mode)
 583                 flac__analyze_finish(d->aopts);
 584         DecoderSession_destroy(d, /*error_occurred=*/true);
 585         return 1;
 586 }
 587
 588 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
 589 {
 590         /* convert from mm:ss.sss to sample number if necessary */
 591         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
 592
 593         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
 594         if(spec->is_relative && spec->value.samples == 0) {
 595                 spec->is_relative = false;
 596                 return true;
 597         }
 598
 599         /* in any other case the total samples in the input must be known */
 600         if(total_samples_in_input == 0) {
 601                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when FLAC metadata has total sample count of 0\n", inbasefilename);
 602                 return false;
 603         }
 604
 605         FLAC__ASSERT(spec->value_is_samples);
 606
 607         /* convert relative specifications to absolute */
 608         if(spec->is_relative) {
 609                 if(spec->value.samples <= 0)
 610                         spec->value.samples += (FLAC__int64)total_samples_in_input;
 611                 else
 612                         spec->value.samples += skip;
 613                 spec->is_relative = false;
 614         }
 615
 616         /* error check */
 617         if(spec->value.samples < 0) {
 618                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
 619                 return false;
 620         }
 621         if((FLAC__uint64)spec->value.samples <= skip) {
 622                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
 623                 return false;
 624         }
 625         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
 626                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
 627                 return false;
 628         }
 629
 630         return true;
 631 }
 632
 633 FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples)
 634 {
 635         const char *fmt_desc = decoder_session->is_wave_out? "WAVE" : "AIFF";
 636         FLAC__uint64 data_size = samples * decoder_session->channels * ((decoder_session->bps+7)/8);
 637         const FLAC__uint32 aligned_data_size = (FLAC__uint32)((data_size+1) & (~1U)); /* we'll check for overflow later */
 638         if(samples == 0) {
 639                 if(f == stdout) {
 640                         flac__utils_printf(stderr, 1, "%s: WARNING, don't have accurate sample count available for %s header.\n", decoder_session->inbasefilename, fmt_desc);
 641                         flac__utils_printf(stderr, 1, "             Generated %s file will have a data chunk size of 0.  Try\n", fmt_desc);
 642                         flac__utils_printf(stderr, 1, "             decoding directly to a file instead.\n");
 643                 }
 644                 else {
 645                         decoder_session->iff_headers_need_fixup = true;
 646                 }
 647         }
 648         if(data_size >= 0xFFFFFFDC) {
 649                 flac__utils_printf(stderr, 1, "%s: ERROR: stream is too big to fit in a single %s file chunk\n", decoder_session->inbasefilename, fmt_desc);
 650                 return false;
 651         }
 652         if(decoder_session->is_wave_out) {
 653                 if(flac__utils_fwrite("RIFF", 1, 4, f) != 4)
 654                         return false;
 655
 656                 if(!write_little_endian_uint32(f, aligned_data_size+36)) /* filesize-8 */
 657                         return false;
 658
 659                 if(flac__utils_fwrite("WAVEfmt ", 1, 8, f) != 8)
 660                         return false;
 661
 662                 if(flac__utils_fwrite("\020\000\000\000", 1, 4, f) != 4) /* chunk size = 16 */
 663                         return false;
 664
 665                 if(flac__utils_fwrite("\001\000", 1, 2, f) != 2) /* compression code == 1 */
 666                         return false;
 667
 668                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 669                         return false;
 670
 671                 if(!write_little_endian_uint32(f, decoder_session->sample_rate))
 672                         return false;
 673
 674                 if(!write_little_endian_uint32(f, decoder_session->sample_rate * decoder_session->channels * ((decoder_session->bps+7) / 8))) /* @@@ or is it (sample_rate*channels*bps) / 8 ??? */
 675                         return false;
 676
 677                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels * ((decoder_session->bps+7) / 8)))) /* block align */
 678                         return false;
 679
 680                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->bps))) /* bits per sample */
 681                         return false;
 682
 683                 if(flac__utils_fwrite("data", 1, 4, f) != 4)
 684                         return false;
 685
 686                 if(!write_little_endian_uint32(f, (FLAC__uint32)data_size)) /* data size */
 687                         return false;
 688         }
 689         else {
 690                 if(flac__utils_fwrite("FORM", 1, 4, f) != 4)
 691                         return false;
 692
 693                 if(!write_big_endian_uint32(f, aligned_data_size+46)) /* filesize-8 */
 694                         return false;
 695
 696                 if(flac__utils_fwrite("AIFFCOMM", 1, 8, f) != 8)
 697                         return false;
 698
 699                 if(flac__utils_fwrite("\000\000\000\022", 1, 4, f) != 4) /* chunk size = 18 */
 700                         return false;
 701
 702                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 703                         return false;
 704
 705                 if(!write_big_endian_uint32(f, (FLAC__uint32)samples))
 706                         return false;
 707
 708                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->bps)))
 709                         return false;
 710
 711                 if(!write_sane_extended(f, decoder_session->sample_rate))
 712                         return false;
 713
 714                 if(flac__utils_fwrite("SSND", 1, 4, f) != 4)
 715                         return false;
 716
 717                 if(!write_big_endian_uint32(f, (FLAC__uint32)data_size+8)) /* data size */
 718                         return false;
 719
 720                 if(!write_big_endian_uint32(f, 0/*offset*/))
 721                         return false;
 722
 723                 if(!write_big_endian_uint32(f, 0/*block_size*/))
 724                         return false;
 725         }
 726
 727         return true;
 728 }
 729
 730 FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val)
 731 {
 732         FLAC__byte *b = (FLAC__byte*)(&val);
 733         if(is_big_endian_host_) {
 734                 FLAC__byte tmp;
 735                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 736         }
 737         return flac__utils_fwrite(b, 1, 2, f) == 2;
 738 }
 739
 740 FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val)
 741 {
 742         FLAC__byte *b = (FLAC__byte*)(&val);
 743         if(is_big_endian_host_) {
 744                 FLAC__byte tmp;
 745                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 746                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 747         }
 748         return flac__utils_fwrite(b, 1, 4, f) == 4;
 749 }
 750
 751 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
 752 {
 753         FLAC__byte *b = (FLAC__byte*)(&val);
 754         if(!is_big_endian_host_) {
 755                 FLAC__byte tmp;
 756                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 757         }
 758         return flac__utils_fwrite(b, 1, 2, f) == 2;
 759 }
 760
 761 FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val)
 762 {
 763         FLAC__byte *b = (FLAC__byte*)(&val);
 764         if(!is_big_endian_host_) {
 765                 FLAC__byte tmp;
 766                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 767                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 768         }
 769         return flac__utils_fwrite(b, 1, 4, f) == 4;
 770 }
 771
 772 FLAC__bool write_sane_extended(FILE *f, unsigned val)
 773         /* Write to 'f' a SANE extended representation of 'val'.  Return false if
 774         * the write succeeds; return true otherwise.
 775         *
 776         * SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
 777         * of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
 778         * representations, it does not imply a 1 above the MSB of the significand.
 779         *
 780         * Preconditions:
 781         *  val!=0U
 782         */
 783 {
 784         unsigned int shift, exponent;
 785
 786         FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */
 787
 788         for(shift= 0U; (val>>(31-shift))==0U; ++shift)
 789                 ;
 790         val<<= shift;
 791         exponent= 63U-(shift+32U); /* add 32 for unused second word */
 792
 793         if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
 794                 return false;
 795         if(!write_big_endian_uint32(f, val))
 796                 return false;
 797         if(!write_big_endian_uint32(f, 0)) /* unused second word */
 798                 return false;
 799
 800         return true;
 801 }
 802
 803 FLAC__bool fixup_iff_headers(DecoderSession *d)
 804 {
 805         const char *fmt_desc = (d->is_wave_out? "WAVE" : "AIFF");
 806         FILE *f = fopen(d->outfilename, "r+b"); /* stream is positioned at beginning of file */
 807
 808         if(0 == f) {
 809                 flac__utils_printf(stderr, 1, "ERROR, couldn't open file %s while fixing up %s chunk size: %s\n", d->outfilename, fmt_desc, strerror(errno));
 810                 return false;
 811         }
 812
 813         if(!write_iff_headers(f, d, d->samples_processed)) {
 814                 fclose(f);
 815                 return false;
 816         }
 817
 818         fclose(f);
 819         return true;
 820 }
 821
 822 FLAC__StreamDecoderWriteStatus write_callback(const void *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 823 {
 824         DecoderSession *decoder_session = (DecoderSession*)client_data;
 825         FILE *fout = decoder_session->fout;
 826         const unsigned bps = frame->header.bits_per_sample, channels = frame->header.channels;
 827         FLAC__bool is_big_endian = (decoder_session->is_aiff_out? true : (decoder_session->is_wave_out? false : decoder_session->is_big_endian));
 828         FLAC__bool is_unsigned_samples = (decoder_session->is_aiff_out? false : (decoder_session->is_wave_out? bps<=8 : decoder_session->is_unsigned_samples));
 829         unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
 830         static FLAC__int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * sizeof(FLAC__int32)]; /* WATCHOUT: can be up to 2 megs */
 831         FLAC__uint8  *u8buffer  = (FLAC__uint8  *)s8buffer;
 832         FLAC__int16  *s16buffer = (FLAC__int16  *)s8buffer;
 833         FLAC__uint16 *u16buffer = (FLAC__uint16 *)s8buffer;
 834         FLAC__int32  *s32buffer = (FLAC__int32  *)s8buffer;
 835         FLAC__uint32 *u32buffer = (FLAC__uint32 *)s8buffer;
 836         size_t bytes_to_write = 0;
 837
 838         (void)decoder;
 839
 840         if(decoder_session->abort_flag)
 841                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 842
 843         /* sanity-check the bits-per-sample */
 844         if(decoder_session->bps) {
 845                 if(bps != decoder_session->bps) {
 846                         if(decoder_session->got_stream_info)
 847                                 flac__utils_printf(stderr, 1, "%s: ERROR, bits-per-sample is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, bps, decoder_session->bps);
 848                         else
 849                                 flac__utils_printf(stderr, 1, "%s: ERROR, bits-per-sample is %u in this frame but %u in previous frames\n", decoder_session->inbasefilename, bps, decoder_session->bps);
 850                         if(!decoder_session->continue_through_decode_errors)
 851                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 852                 }
 853         }
 854         else {
 855                 /* must not have gotten STREAMINFO, save the bps from the frame header */
 856                 FLAC__ASSERT(!decoder_session->got_stream_info);
 857                 decoder_session->bps = bps;
 858         }
 859
 860         /* sanity-check the #channels */
 861         if(decoder_session->channels) {
 862                 if(channels != decoder_session->channels) {
 863                         if(decoder_session->got_stream_info)
 864                                 flac__utils_printf(stderr, 1, "%s: ERROR, channels is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, channels, decoder_session->channels);
 865                         else
 866                                 flac__utils_printf(stderr, 1, "%s: ERROR, channels is %u in this frame but %u in previous frames\n", decoder_session->inbasefilename, channels, decoder_session->channels);
 867                         if(!decoder_session->continue_through_decode_errors)
 868                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 869                 }
 870         }
 871         else {
 872                 /* must not have gotten STREAMINFO, save the #channels from the frame header */
 873                 FLAC__ASSERT(!decoder_session->got_stream_info);
 874                 decoder_session->channels = channels;
 875         }
 876
 877         /* sanity-check the sample rate */
 878         if(decoder_session->sample_rate) {
 879                 if(frame->header.sample_rate != decoder_session->sample_rate) {
 880                         if(decoder_session->got_stream_info)
 881                                 flac__utils_printf(stderr, 1, "%s: ERROR, sample rate is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, frame->header.sample_rate, decoder_session->sample_rate);
 882                         else
 883                                 flac__utils_printf(stderr, 1, "%s: ERROR, sample rate is %u in this frame but %u in previous frames\n", decoder_session->inbasefilename, frame->header.sample_rate, decoder_session->sample_rate);
 884                         if(!decoder_session->continue_through_decode_errors)
 885                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 886                 }
 887         }
 888         else {
 889                 /* must not have gotten STREAMINFO, save the sample rate from the frame header */
 890                 FLAC__ASSERT(!decoder_session->got_stream_info);
 891                 decoder_session->sample_rate = frame->header.sample_rate;
 892         }
 893
 894         /*
 895          * limit the number of samples to accept based on --until
 896          */
 897         FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
 898         /* if we never got the total_samples from the metadata, the skip and until specs would never have been canonicalized, so protect against that: */
 899         if(decoder_session->skip_specification->is_relative) {
 900                 if(decoder_session->skip_specification->value.samples == 0) /* special case for when no --skip was given */
 901                         decoder_session->skip_specification->is_relative = false; /* convert to our meaning of beginning-of-stream */
 902                 else {
 903                         flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --skip because the total sample count was not found in the metadata\n", decoder_session->inbasefilename);
 904                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 905                 }
 906         }
 907         if(decoder_session->until_specification->is_relative) {
 908                 if(decoder_session->until_specification->value.samples == 0) /* special case for when no --until was given */
 909                         decoder_session->until_specification->is_relative = false; /* convert to our meaning of end-of-stream */
 910                 else {
 911                         flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until because the total sample count was not found in the metadata\n", decoder_session->inbasefilename);
 912                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 913                 }
 914         }
 915         FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
 916         FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
 917         if(decoder_session->until_specification->value.samples > 0) {
 918                 const FLAC__uint64 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
 919                 const FLAC__uint64 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
 920                 const FLAC__uint64 input_samples_passed = skip + decoder_session->samples_processed;
 921                 FLAC__ASSERT(until >= input_samples_passed);
 922                 if(input_samples_passed + wide_samples > until)
 923                         wide_samples = (unsigned)(until - input_samples_passed);
 924                 if (wide_samples == 0) {
 925                         decoder_session->abort_flag = true;
 926                         decoder_session->aborting_due_to_until = true;
 927                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 928                 }
 929         }
 930
 931         if(wide_samples > 0) {
 932                 decoder_session->samples_processed += wide_samples;
 933                 decoder_session->frame_counter++;
 934
 935                 if(!(decoder_session->frame_counter & 0x3f))
 936                         print_stats(decoder_session);
 937
 938                 if(decoder_session->analysis_mode) {
 939                         flac__analyze_frame(frame, decoder_session->frame_counter-1, decoder_session->aopts, fout);
 940                 }
 941                 else if(!decoder_session->test_only) {
 942                         if (decoder_session->replaygain.apply) {
 943                                 bytes_to_write = FLAC__replaygain_synthesis__apply_gain(
 944                                         u8buffer,
 945                                         !is_big_endian,
 946                                         is_unsigned_samples,
 947                                         buffer,
 948                                         wide_samples,
 949                                         channels,
 950                                         bps, /* source_bps */
 951                                         bps, /* target_bps */
 952                                         decoder_session->replaygain.scale,
 953                                         decoder_session->replaygain.spec.limiter == RGSS_LIMIT__HARD, /* hard_limit */
 954                                         decoder_session->replaygain.spec.noise_shaping != NOISE_SHAPING_NONE, /* do_dithering */
 955                                         &decoder_session->replaygain.dither_context
 956                                 );
 957                         }
 958                         else if(bps == 8) {
 959                                 if(is_unsigned_samples) {
 960                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 961                                                 for(channel = 0; channel < channels; channel++, sample++)
 962                                                         u8buffer[sample] = (FLAC__uint8)(buffer[channel][wide_sample] + 0x80);
 963                                 }
 964                                 else {
 965                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 966                                                 for(channel = 0; channel < channels; channel++, sample++)
 967                                                         s8buffer[sample] = (FLAC__int8)(buffer[channel][wide_sample]);
 968                                 }
 969                                 bytes_to_write = sample;
 970                         }
 971                         else if(bps == 16) {
 972                                 if(is_unsigned_samples) {
 973                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 974                                                 for(channel = 0; channel < channels; channel++, sample++)
 975                                                         u16buffer[sample] = (FLAC__uint16)(buffer[channel][wide_sample] + 0x8000);
 976                                 }
 977                                 else {
 978                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 979                                                 for(channel = 0; channel < channels; channel++, sample++)
 980                                                         s16buffer[sample] = (FLAC__int16)(buffer[channel][wide_sample]);
 981                                 }
 982                                 if(is_big_endian != is_big_endian_host_) {
 983                                         unsigned char tmp;
 984                                         const unsigned bytes = sample * 2;
 985                                         for(byte = 0; byte < bytes; byte += 2) {
 986                                                 tmp = u8buffer[byte];
 987                                                 u8buffer[byte] = u8buffer[byte+1];
 988                                                 u8buffer[byte+1] = tmp;
 989                                         }
 990                                 }
 991                                 bytes_to_write = 2 * sample;
 992                         }
 993                         else if(bps == 24) {
 994                                 if(is_unsigned_samples) {
 995                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 996                                                 for(channel = 0; channel < channels; channel++, sample++)
 997                                                         u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
 998                                 }
 999                                 else {
1000                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1001                                                 for(channel = 0; channel < channels; channel++, sample++)
1002                                                         s32buffer[sample] = buffer[channel][wide_sample];
1003                                 }
1004                                 if(is_big_endian != is_big_endian_host_) {
1005                                         unsigned char tmp;
1006                                         const unsigned bytes = sample * 4;
1007                                         for(byte = 0; byte < bytes; byte += 4) {
1008                                                 tmp = u8buffer[byte];
1009                                                 u8buffer[byte] = u8buffer[byte+3];
1010                                                 u8buffer[byte+3] = tmp;
1011                                                 tmp = u8buffer[byte+1];
1012                                                 u8buffer[byte+1] = u8buffer[byte+2];
1013                                                 u8buffer[byte+2] = tmp;
1014                                         }
1015                                 }
1016                                 if(is_big_endian) {
1017                                         unsigned lbyte;
1018                                         const unsigned bytes = sample * 4;
1019                                         for(lbyte = byte = 0; byte < bytes; ) {
1020                                                 byte++;
1021                                                 u8buffer[lbyte++] = u8buffer[byte++];
1022                                                 u8buffer[lbyte++] = u8buffer[byte++];
1023                                                 u8buffer[lbyte++] = u8buffer[byte++];
1024                                         }
1025                                 }
1026                                 else {
1027                                         unsigned lbyte;
1028                                         const unsigned bytes = sample * 4;
1029                                         for(lbyte = byte = 0; byte < bytes; ) {
1030                                                 u8buffer[lbyte++] = u8buffer[byte++];
1031                                                 u8buffer[lbyte++] = u8buffer[byte++];
1032                                                 u8buffer[lbyte++] = u8buffer[byte++];
1033                                                 byte++;
1034                                         }
1035                                 }
1036                                 bytes_to_write = 3 * sample;
1037                         }
1038                         else {
1039                                 FLAC__ASSERT(0);
1040                         }
1041                 }
1042         }
1043         if(bytes_to_write > 0) {
1044                 if(flac__utils_fwrite(u8buffer, 1, bytes_to_write, fout) != bytes_to_write) {
1045                         /* if a pipe closed when writing to stdout, we let it go without an error message */
1046                         if(errno == EPIPE && decoder_session->fout == stdout)
1047                                 decoder_session->aborting_due_to_until = true;
1048                         decoder_session->abort_flag = true;
1049                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1050                 }
1051         }
1052         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
1053 }
1054
1055 void metadata_callback(const void *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1056 {
1057         DecoderSession *decoder_session = (DecoderSession*)client_data;
1058         (void)decoder;
1059         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
1060                 FLAC__uint64 skip, until;
1061                 decoder_session->got_stream_info = true;
1062                 decoder_session->bps = metadata->data.stream_info.bits_per_sample;
1063                 decoder_session->channels = metadata->data.stream_info.channels;
1064                 decoder_session->sample_rate = metadata->data.stream_info.sample_rate;
1065
1066                 flac__utils_canonicalize_skip_until_specification(decoder_session->skip_specification, decoder_session->sample_rate);
1067                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1068                 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
1069
1070                 /* remember, metadata->data.stream_info.total_samples can be 0, meaning 'unknown' */
1071                 if(metadata->data.stream_info.total_samples > 0 && skip >= metadata->data.stream_info.total_samples) {
1072                         flac__utils_printf(stderr, 1, "%s: ERROR trying to --skip more samples than in stream\n", decoder_session->inbasefilename);
1073                         decoder_session->abort_flag = true;
1074                         return;
1075                 }
1076                 else if(metadata->data.stream_info.total_samples == 0 && skip > 0) {
1077                         flac__utils_printf(stderr, 1, "%s: ERROR, can't --skip when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1078                         decoder_session->abort_flag = true;
1079                         return;
1080                 }
1081                 FLAC__ASSERT(skip == 0 || 0 == decoder_session->cue_specification);
1082                 decoder_session->total_samples = metadata->data.stream_info.total_samples - skip;
1083
1084                 /* note that we use metadata->data.stream_info.total_samples instead of decoder_session->total_samples */
1085                 if(!canonicalize_until_specification(decoder_session->until_specification, decoder_session->inbasefilename, decoder_session->sample_rate, skip, metadata->data.stream_info.total_samples)) {
1086                         decoder_session->abort_flag = true;
1087                         return;
1088                 }
1089                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1090                 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1091
1092                 if(until > 0) {
1093                         FLAC__ASSERT(decoder_session->total_samples != 0);
1094                         FLAC__ASSERT(0 == decoder_session->cue_specification);
1095                         decoder_session->total_samples -= (metadata->data.stream_info.total_samples - until);
1096                 }
1097
1098                 if(decoder_session->bps != 8 && decoder_session->bps != 16 && decoder_session->bps != 24) {
1099                         flac__utils_printf(stderr, 1, "%s: ERROR: bits per sample is not 8/16/24\n", decoder_session->inbasefilename);
1100                         decoder_session->abort_flag = true;
1101                         return;
1102                 }
1103         }
1104         else if(metadata->type == FLAC__METADATA_TYPE_CUESHEET) {
1105                 /* remember, at this point, decoder_session->total_samples can be 0, meaning 'unknown' */
1106                 if(decoder_session->total_samples == 0) {
1107                         flac__utils_printf(stderr, 1, "%s: ERROR can't use --cue when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1108                         decoder_session->abort_flag = true;
1109                         return;
1110                 }
1111
1112                 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);
1113
1114                 FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1115                 FLAC__ASSERT(decoder_session->skip_specification->value_is_samples);
1116
1117                 FLAC__ASSERT(!decoder_session->until_specification->is_relative);
1118                 FLAC__ASSERT(decoder_session->until_specification->value_is_samples);
1119
1120                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1121                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1122                 FLAC__ASSERT((FLAC__uint64)decoder_session->until_specification->value.samples <= decoder_session->total_samples);
1123                 FLAC__ASSERT(decoder_session->skip_specification->value.samples <= decoder_session->until_specification->value.samples);
1124
1125                 decoder_session->total_samples = decoder_session->until_specification->value.samples - decoder_session->skip_specification->value.samples;
1126         }
1127         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
1128                 if (decoder_session->replaygain.spec.apply) {
1129                         double gain, peak;
1130                         if (!(decoder_session->replaygain.apply = grabbag__replaygain_load_from_vorbiscomment(metadata, decoder_session->replaygain.spec.use_album_gain, /*strict=*/false, &gain, &peak))) {
1131                                 flac__utils_printf(stderr, 1, "%s: WARNING: can't get %s (or even %s) ReplayGain tags\n", decoder_session->inbasefilename, decoder_session->replaygain.spec.use_album_gain? "album":"track", decoder_session->replaygain.spec.use_album_gain? "track":"album");
1132                         }
1133                         else {
1134                                 const char *ls[] = { "no", "peak", "hard" };
1135                                 const char *ns[] = { "no", "low", "medium", "high" };
1136                                 decoder_session->replaygain.scale = grabbag__replaygain_compute_scale_factor(peak, gain, decoder_session->replaygain.spec.preamp, decoder_session->replaygain.spec.limiter == RGSS_LIMIT__PEAK);
1137                                 FLAC__ASSERT(decoder_session->bps > 0 && decoder_session->bps <= 32);
1138                                 FLAC__replaygain_synthesis__init_dither_context(&decoder_session->replaygain.dither_context, decoder_session->bps, decoder_session->replaygain.spec.noise_shaping);
1139                                 flac__utils_printf(stderr, 1, "%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]);
1140                                 flac__utils_printf(stderr, 1, "%s: WARNING: applying ReplayGain is not lossless\n", decoder_session->inbasefilename);
1141                         }
1142                 }
1143         }
1144 }
1145
1146 void error_callback(const void *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1147 {
1148         DecoderSession *decoder_session = (DecoderSession*)client_data;
1149         (void)decoder;
1150         flac__utils_printf(stderr, 1, "%s: *** Got error code %d:%s\n", decoder_session->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1151         if(!decoder_session->continue_through_decode_errors) {
1152                 decoder_session->abort_flag = true;
1153                 if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
1154                         decoder_session->aborting_due_to_unparseable = true;
1155         }
1156 }
1157
1158 void print_error_with_state(const DecoderSession *d, const char *message)
1159 {
1160         const int ilen = strlen(d->inbasefilename) + 1;
1161         const char *state_string;
1162
1163         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1164
1165 #ifdef FLAC__HAS_OGG
1166         if(d->is_ogg) {
1167                 state_string = OggFLAC__file_decoder_get_resolved_state_string(d->decoder.ogg.file);
1168         }
1169         else
1170 #endif
1171         {
1172                 state_string = FLAC__file_decoder_get_resolved_state_string(d->decoder.flac.file);
1173         }
1174
1175         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", state_string);
1176
1177         /* print out some more info for some errors: */
1178         if (d->aborting_due_to_unparseable) {
1179                 flac__utils_printf(stderr, 1,
1180                         "\n"
1181                         "The FLAC stream may have been created by a more advanced encoder.  Try\n"
1182                         "  metaflac --show-vendor-tag %s\n"
1183                         "If the version number is greater than %s, this decoder is probably\n"
1184                         "not able to decode the file.  If the version number is not, the file\n"
1185                         "may be corrupted, or you may have found a bug.  In this case please\n"
1186                         "submit a bug report to\n"
1187                         "    http://sourceforge.net/bugs/?func=addbug&group_id=13478\n"
1188                         "Make sure to use the \"Monitor\" feature to monitor the bug status.\n",
1189                         d->inbasefilename, FLAC__VERSION_STRING
1190                 );
1191         }
1192         else if (
1193                 0 == strcmp(state_string, FLAC__FileDecoderStateString[FLAC__FILE_DECODER_ERROR_OPENING_FILE])
1194 #ifdef FLAC__HAS_OGG
1195                 || 0 == strcmp(state_string, OggFLAC__FileDecoderStateString[OggFLAC__FILE_DECODER_ERROR_OPENING_FILE])
1196 #endif
1197         ) {
1198                 flac__utils_printf(stderr, 1,
1199                         "\n"
1200                         "An error occurred opening the input file; it is likely that it does not exist\n"
1201                         "or is not readable.\n"
1202                 );
1203         }
1204 }
1205
1206 void print_stats(const DecoderSession *decoder_session)
1207 {
1208         if(flac__utils_verbosity_ >= 2) {
1209 #if defined _MSC_VER || defined __MINGW32__
1210                 /* with MSVC you have to spoon feed it the casting */
1211                 const double progress = (double)(FLAC__int64)decoder_session->samples_processed / (double)(FLAC__int64)decoder_session->total_samples * 100.0;
1212 #else
1213                 const double progress = (double)decoder_session->samples_processed / (double)decoder_session->total_samples * 100.0;
1214 #endif
1215                 if(decoder_session->total_samples > 0) {
1216                         fprintf(stderr, "\r%s: %s%u%% complete",
1217                                 decoder_session->inbasefilename,
1218                                 decoder_session->test_only? "testing, " : decoder_session->analysis_mode? "analyzing, " : "",
1219                                 (unsigned)floor(progress + 0.5)
1220                         );
1221                 }
1222                 else {
1223                         fprintf(stderr, "\r%s: %s %u samples",
1224                                 decoder_session->inbasefilename,
1225                                 decoder_session->test_only? "tested" : decoder_session->analysis_mode? "analyzed" : "wrote",
1226                                 (unsigned)decoder_session->samples_processed
1227                         );
1228                 }
1229         }
1230 }