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 #if _MSC_VER <= 1200 /* @@@ [2G limit] */
  32 #define fseeko fseek
  33 #define ftello ftell
  34 #endif
  35 #endif
  36 #include <errno.h>
  37 #include <math.h> /* for floor() */
  38 #include <stdio.h> /* for FILE etc. */
  39 #include <string.h> /* for strcmp(), strerror() */
  40 #include "FLAC/all.h"
  41 #include "share/grabbag.h"
  42 #include "share/replaygain_synthesis.h"
  43 #include "decode.h"
  44
  45 typedef struct {
  46 #ifdef FLAC__HAS_OGG
  47         FLAC__bool is_ogg;
  48 #endif
  49
  50         FLAC__bool is_aiff_out;
  51         FLAC__bool is_wave_out;
  52         FLAC__bool continue_through_decode_errors;
  53         FLAC__bool channel_map_none;
  54
  55         struct {
  56                 replaygain_synthesis_spec_t spec;
  57                 FLAC__bool apply; /* 'spec.apply' is just a request; this 'apply' means we actually parsed the RG tags and are ready to go */
  58                 double scale;
  59                 DitherContext dither_context;
  60         } replaygain;
  61
  62         FLAC__bool test_only;
  63         FLAC__bool analysis_mode;
  64         analysis_options aopts;
  65         utils__SkipUntilSpecification *skip_specification;
  66         utils__SkipUntilSpecification *until_specification; /* a canonicalized value of 0 mean end-of-stream (i.e. --until=-0) */
  67         utils__CueSpecification *cue_specification;
  68
  69         const char *inbasefilename;
  70         const char *outfilename;
  71
  72         FLAC__uint64 samples_processed;
  73         unsigned frame_counter;
  74         FLAC__bool abort_flag;
  75         FLAC__bool aborting_due_to_until; /* true if we intentionally abort decoding prematurely because we hit the --until point */
  76         FLAC__bool aborting_due_to_unparseable; /* true if we abort decoding because we hit an unparseable frame */
  77
  78         FLAC__bool iff_headers_need_fixup;
  79
  80         FLAC__bool is_big_endian;
  81         FLAC__bool is_unsigned_samples;
  82         FLAC__bool got_stream_info;
  83         FLAC__uint64 total_samples;
  84         unsigned bps;
  85         unsigned channels;
  86         unsigned sample_rate;
  87         FLAC__uint32 channel_mask;
  88
  89         FLAC__StreamDecoder *decoder;
  90
  91         FILE *fout;
  92 } DecoderSession;
  93
  94
  95 static FLAC__bool is_big_endian_host_;
  96
  97
  98 /*
  99  * local routines
 100  */
 101 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, FLAC__bool channel_map_none, 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);
 102 static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
 103 static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, decode_options_t decode_options, const char *infilename);
 104 static FLAC__bool DecoderSession_process(DecoderSession *d);
 105 static int DecoderSession_finish_ok(DecoderSession *d);
 106 static int DecoderSession_finish_error(DecoderSession *d);
 107 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input);
 108 static FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples);
 109 static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val);
 110 static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val);
 111 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 112 static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val);
 113 static FLAC__bool write_sane_extended(FILE *f, unsigned val);
 114 static FLAC__bool fixup_iff_headers(DecoderSession *d);
 115 static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 116 static void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 117 static void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 118 static void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status);
 119 static void print_error_with_state(const DecoderSession *d, const char *message);
 120 static void print_stats(const DecoderSession *decoder_session);
 121
 122
 123 /*
 124  * public routines
 125  */
 126 int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 127 {
 128         DecoderSession decoder_session;
 129
 130         if(!
 131                 DecoderSession_construct(
 132                         &decoder_session,
 133 #ifdef FLAC__HAS_OGG
 134                         options.common.is_ogg,
 135 #else
 136                         /*is_ogg=*/false,
 137 #endif
 138                         /*is_aiff_out=*/true,
 139                         /*is_wave_out=*/false,
 140                         options.common.continue_through_decode_errors,
 141                         options.common.channel_map_none,
 142                         options.common.replaygain_synthesis_spec,
 143                         analysis_mode,
 144                         aopts,
 145                         &options.common.skip_specification,
 146                         &options.common.until_specification,
 147                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 148                         infilename,
 149                         outfilename
 150                 )
 151         )
 152                 return 1;
 153
 154         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 155                 return DecoderSession_finish_error(&decoder_session);
 156
 157         if(!DecoderSession_process(&decoder_session))
 158                 return DecoderSession_finish_error(&decoder_session);
 159
 160         return DecoderSession_finish_ok(&decoder_session);
 161 }
 162
 163 int flac__decode_wav(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 164 {
 165         DecoderSession decoder_session;
 166
 167         if(!
 168                 DecoderSession_construct(
 169                         &decoder_session,
 170 #ifdef FLAC__HAS_OGG
 171                         options.common.is_ogg,
 172 #else
 173                         /*is_ogg=*/false,
 174 #endif
 175                         /*is_aiff_out=*/false,
 176                         /*is_wave_out=*/true,
 177                         options.common.continue_through_decode_errors,
 178                         options.common.channel_map_none,
 179                         options.common.replaygain_synthesis_spec,
 180                         analysis_mode,
 181                         aopts,
 182                         &options.common.skip_specification,
 183                         &options.common.until_specification,
 184                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 185                         infilename,
 186                         outfilename
 187                 )
 188         )
 189                 return 1;
 190
 191         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 192                 return DecoderSession_finish_error(&decoder_session);
 193
 194         if(!DecoderSession_process(&decoder_session))
 195                 return DecoderSession_finish_error(&decoder_session);
 196
 197         return DecoderSession_finish_ok(&decoder_session);
 198 }
 199
 200 int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, raw_decode_options_t options)
 201 {
 202         DecoderSession decoder_session;
 203
 204         decoder_session.is_big_endian = options.is_big_endian;
 205         decoder_session.is_unsigned_samples = options.is_unsigned_samples;
 206
 207         if(!
 208                 DecoderSession_construct(
 209                         &decoder_session,
 210 #ifdef FLAC__HAS_OGG
 211                         options.common.is_ogg,
 212 #else
 213                         /*is_ogg=*/false,
 214 #endif
 215                         /*is_aiff_out=*/false,
 216                         /*is_wave_out=*/false,
 217                         options.common.continue_through_decode_errors,
 218                         options.common.channel_map_none,
 219                         options.common.replaygain_synthesis_spec,
 220                         analysis_mode,
 221                         aopts,
 222                         &options.common.skip_specification,
 223                         &options.common.until_specification,
 224                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 225                         infilename,
 226                         outfilename
 227                 )
 228         )
 229                 return 1;
 230
 231         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 232                 return DecoderSession_finish_error(&decoder_session);
 233
 234         if(!DecoderSession_process(&decoder_session))
 235                 return DecoderSession_finish_error(&decoder_session);
 236
 237         return DecoderSession_finish_ok(&decoder_session);
 238 }
 239
 240 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, FLAC__bool channel_map_none, 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)
 241 {
 242 #ifdef FLAC__HAS_OGG
 243         d->is_ogg = is_ogg;
 244 #else
 245         (void)is_ogg;
 246 #endif
 247
 248         d->is_aiff_out = is_aiff_out;
 249         d->is_wave_out = is_wave_out;
 250         d->continue_through_decode_errors = continue_through_decode_errors;
 251         d->channel_map_none = channel_map_none;
 252         d->replaygain.spec = replaygain_synthesis_spec;
 253         d->replaygain.apply = false;
 254         d->replaygain.scale = 0.0;
 255         /* d->replaygain.dither_context gets initialized later once we know the sample resolution */
 256         d->test_only = (0 == outfilename);
 257         d->analysis_mode = analysis_mode;
 258         d->aopts = aopts;
 259         d->skip_specification = skip_specification;
 260         d->until_specification = until_specification;
 261         d->cue_specification = cue_specification;
 262
 263         d->inbasefilename = grabbag__file_get_basename(infilename);
 264         d->outfilename = outfilename;
 265
 266         d->samples_processed = 0;
 267         d->frame_counter = 0;
 268         d->abort_flag = false;
 269         d->aborting_due_to_until = false;
 270         d->aborting_due_to_unparseable = false;
 271
 272         d->iff_headers_need_fixup = false;
 273
 274         d->total_samples = 0;
 275         d->got_stream_info = false;
 276         d->bps = 0;
 277         d->channels = 0;
 278         d->sample_rate = 0;
 279         d->channel_mask = 0;
 280
 281         d->decoder = 0;
 282
 283         d->fout = 0; /* initialized with an open file later if necessary */
 284
 285         FLAC__ASSERT(!(d->test_only && d->analysis_mode));
 286
 287         if(!d->test_only) {
 288                 if(0 == strcmp(outfilename, "-")) {
 289                         d->fout = grabbag__file_get_binary_stdout();
 290                 }
 291                 else {
 292                         if(0 == (d->fout = fopen(outfilename, "wb"))) {
 293                                 flac__utils_printf(stderr, 1, "%s: ERROR: can't open output file %s: %s\n", d->inbasefilename, outfilename, strerror(errno));
 294                                 DecoderSession_destroy(d, /*error_occurred=*/true);
 295                                 return false;
 296                         }
 297                 }
 298         }
 299
 300         if(analysis_mode)
 301                 flac__analyze_init(aopts);
 302
 303         return true;
 304 }
 305
 306 void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred)
 307 {
 308         if(0 != d->fout && d->fout != stdout) {
 309                 fclose(d->fout);
 310                 if(error_occurred)
 311                         unlink(d->outfilename);
 312         }
 313 }
 314
 315 FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, decode_options_t decode_options, const char *infilename)
 316 {
 317         FLAC__StreamDecoderInitStatus init_status;
 318         FLAC__uint32 test = 1;
 319
 320         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
 321
 322         decoder_session->decoder = FLAC__stream_decoder_new();
 323
 324         if(0 == decoder_session->decoder) {
 325                 flac__utils_printf(stderr, 1, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 326                 return false;
 327         }
 328
 329         FLAC__stream_decoder_set_md5_checking(decoder_session->decoder, true);
 330         if (0 != decoder_session->cue_specification)
 331                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_CUESHEET);
 332         if (decoder_session->replaygain.spec.apply)
 333                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 334
 335 #ifdef FLAC__HAS_OGG
 336         if(decoder_session->is_ogg) {
 337                 if(!decode_options.use_first_serial_number)
 338                         FLAC__stream_decoder_set_ogg_serial_number(decoder_session->decoder, decode_options.serial_number);
 339                 init_status = FLAC__stream_decoder_init_ogg_file(decoder_session->decoder, strcmp(infilename, "-")? infilename : 0, write_callback, metadata_callback, error_callback, /*client_data=*/decoder_session);
 340         }
 341         else
 342 #else
 343         (void)decode_options;
 344 #endif
 345         {
 346                 init_status = FLAC__stream_decoder_init_file(decoder_session->decoder, strcmp(infilename, "-")? infilename : 0, write_callback, metadata_callback, error_callback, /*client_data=*/decoder_session);
 347         }
 348
 349         if(init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
 350                 print_error_with_init_status(decoder_session, "ERROR initializing decoder", init_status);
 351                 return false;
 352         }
 353
 354         return true;
 355 }
 356
 357 FLAC__bool DecoderSession_process(DecoderSession *d)
 358 {
 359         if(!FLAC__stream_decoder_process_until_end_of_metadata(d->decoder)) {
 360                 flac__utils_printf(stderr, 2, "\n");
 361                 print_error_with_state(d, "ERROR while decoding metadata");
 362                 return false;
 363         }
 364         if(FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM) {
 365                 flac__utils_printf(stderr, 2, "\n");
 366                 print_error_with_state(d, "ERROR during metadata decoding");
 367                 if(!d->continue_through_decode_errors)
 368                         return false;
 369         }
 370
 371         if(d->abort_flag)
 372                 return false;
 373
 374         /* set channel mapping */
 375         if(!d->channel_map_none) {
 376                 /* currently FLAC order matches SMPTE/WAVEFORMATEXTENSIBLE order, so no reordering is necessary; see encode.c */
 377                 /* only the channel mask must be set if it was not already picked up from the WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag */
 378                 if(d->channels == 1) {
 379                         if(d->channel_mask == 0)
 380                                 d->channel_mask = 0x0001;
 381                 }
 382                 else if(d->channels == 2) {
 383                         if(d->channel_mask == 0)
 384                                 d->channel_mask = 0x0003;
 385                 }
 386                 else if(d->channels == 3) {
 387                         if(d->channel_mask == 0)
 388                                 d->channel_mask = 0x0007;
 389                 }
 390                 else if(d->channels == 4) {
 391                         if(d->channel_mask == 0)
 392                                 d->channel_mask = 0x0033;
 393                 }
 394                 else if(d->channels == 5) {
 395                         if(d->channel_mask == 0)
 396                                 d->channel_mask = 0x0607;
 397                 }
 398                 else if(d->channels == 6) {
 399                         if(d->channel_mask == 0)
 400                                 d->channel_mask = 0x060f;
 401                 }
 402         }
 403
 404         /* write the WAVE/AIFF headers if necessary */
 405         if(!d->analysis_mode && !d->test_only && (d->is_wave_out || d->is_aiff_out)) {
 406                 if(!write_iff_headers(d->fout, d, d->total_samples)) {
 407                         d->abort_flag = true;
 408                         return false;
 409                 }
 410         }
 411
 412         if(d->skip_specification->value.samples > 0) {
 413                 const FLAC__uint64 skip = (FLAC__uint64)d->skip_specification->value.samples;
 414
 415                 if(!FLAC__stream_decoder_seek_absolute(d->decoder, skip)) {
 416                         print_error_with_state(d, "ERROR seeking while skipping bytes");
 417                         return false;
 418                 }
 419         }
 420         if(!FLAC__stream_decoder_process_until_end_of_stream(d->decoder) && !d->aborting_due_to_until) {
 421                 flac__utils_printf(stderr, 2, "\n");
 422                 print_error_with_state(d, "ERROR while decoding data");
 423                 if(!d->continue_through_decode_errors)
 424                         return false;
 425         }
 426         if(FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM && !d->aborting_due_to_until) {
 427                 flac__utils_printf(stderr, 2, "\n");
 428                 print_error_with_state(d, "ERROR during decoding");
 429                 return false;
 430         }
 431
 432         if(!d->analysis_mode && !d->test_only && (d->is_wave_out || d->is_aiff_out) && ((d->total_samples * d->channels * ((d->bps+7)/8)) & 1)) {
 433                 if(flac__utils_fwrite("\000", 1, 1, d->fout) != 1) {
 434                         print_error_with_state(d, d->is_wave_out?
 435                                 "ERROR writing pad byte to WAVE data chunk" :
 436                                 "ERROR writing pad byte to AIFF SSND chunk"
 437                         );
 438                         return false;
 439                 }
 440         }
 441
 442         return true;
 443 }
 444
 445 int DecoderSession_finish_ok(DecoderSession *d)
 446 {
 447         FLAC__bool ok = true, md5_failure = false;
 448
 449         if(d->decoder) {
 450                 md5_failure = !FLAC__stream_decoder_finish(d->decoder) && !d->aborting_due_to_until;
 451                 print_stats(d);
 452                 FLAC__stream_decoder_delete(d->decoder);
 453         }
 454         if(d->analysis_mode)
 455                 flac__analyze_finish(d->aopts);
 456         if(md5_failure) {
 457                 flac__utils_printf(stderr, 1, "\r%s: ERROR, MD5 signature mismatch\n", d->inbasefilename);
 458                 ok = d->continue_through_decode_errors;
 459         }
 460         else if(!d->got_stream_info) {
 461                 flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since there was no STREAMINFO\n", d->inbasefilename);
 462         }
 463         else {
 464                 flac__utils_printf(stderr, 2, "\r%s: %s         \n", d->inbasefilename, d->test_only? "ok           ":d->analysis_mode?"done           ":"done");
 465         }
 466         DecoderSession_destroy(d, /*error_occurred=*/!ok);
 467         if((d->is_wave_out || d->is_aiff_out) && (d->iff_headers_need_fixup || (!d->got_stream_info && strcmp(d->outfilename, "-"))))
 468                 if(!fixup_iff_headers(d))
 469                         return 1;
 470         return ok? 0 : 1;
 471 }
 472
 473 int DecoderSession_finish_error(DecoderSession *d)
 474 {
 475         if(d->decoder) {
 476                 (void)FLAC__stream_decoder_finish(d->decoder);
 477                 FLAC__stream_decoder_delete(d->decoder);
 478         }
 479         if(d->analysis_mode)
 480                 flac__analyze_finish(d->aopts);
 481         DecoderSession_destroy(d, /*error_occurred=*/true);
 482         return 1;
 483 }
 484
 485 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
 486 {
 487         /* convert from mm:ss.sss to sample number if necessary */
 488         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
 489
 490         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
 491         if(spec->is_relative && spec->value.samples == 0) {
 492                 spec->is_relative = false;
 493                 return true;
 494         }
 495
 496         /* in any other case the total samples in the input must be known */
 497         if(total_samples_in_input == 0) {
 498                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when FLAC metadata has total sample count of 0\n", inbasefilename);
 499                 return false;
 500         }
 501
 502         FLAC__ASSERT(spec->value_is_samples);
 503
 504         /* convert relative specifications to absolute */
 505         if(spec->is_relative) {
 506                 if(spec->value.samples <= 0)
 507                         spec->value.samples += (FLAC__int64)total_samples_in_input;
 508                 else
 509                         spec->value.samples += skip;
 510                 spec->is_relative = false;
 511         }
 512
 513         /* error check */
 514         if(spec->value.samples < 0) {
 515                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
 516                 return false;
 517         }
 518         if((FLAC__uint64)spec->value.samples <= skip) {
 519                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
 520                 return false;
 521         }
 522         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
 523                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
 524                 return false;
 525         }
 526
 527         return true;
 528 }
 529
 530 FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples)
 531 {
 532         const char *fmt_desc = decoder_session->is_wave_out? "WAVE" : "AIFF";
 533         const FLAC__bool is_waveformatextensible = decoder_session->is_wave_out && (decoder_session->channel_mask == 2 || decoder_session->channel_mask > 3 || decoder_session->bps%8 || decoder_session->channels > 2);
 534         FLAC__uint64 data_size = samples * decoder_session->channels * ((decoder_session->bps+7)/8);
 535         const FLAC__uint32 aligned_data_size = (FLAC__uint32)((data_size+1) & (~1U)); /* we'll check for overflow later */
 536         if(samples == 0) {
 537                 if(f == stdout) {
 538                         flac__utils_printf(stderr, 1, "%s: WARNING, don't have accurate sample count available for %s header.\n", decoder_session->inbasefilename, fmt_desc);
 539                         flac__utils_printf(stderr, 1, "             Generated %s file will have a data chunk size of 0.  Try\n", fmt_desc);
 540                         flac__utils_printf(stderr, 1, "             decoding directly to a file instead.\n");
 541                 }
 542                 else {
 543                         decoder_session->iff_headers_need_fixup = true;
 544                 }
 545         }
 546         if(data_size >= 0xFFFFFFDC) {
 547                 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);
 548                 return false;
 549         }
 550         if(decoder_session->is_wave_out) {
 551                 if(flac__utils_fwrite("RIFF", 1, 4, f) != 4)
 552                         return false;
 553
 554                 if(!write_little_endian_uint32(f, aligned_data_size+(is_waveformatextensible?60:36))) /* filesize-8 */
 555                         return false;
 556
 557                 if(flac__utils_fwrite("WAVEfmt ", 1, 8, f) != 8)
 558                         return false;
 559
 560                 if(!write_little_endian_uint32(f, is_waveformatextensible? 40 : 16)) /* chunk size */
 561                         return false;
 562
 563                 if(!write_little_endian_uint16(f, (FLAC__uint16)(is_waveformatextensible? 65534 : 1))) /* compression code */
 564                         return false;
 565
 566                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 567                         return false;
 568
 569                 if(!write_little_endian_uint32(f, decoder_session->sample_rate))
 570                         return false;
 571
 572                 if(!write_little_endian_uint32(f, decoder_session->sample_rate * decoder_session->channels * ((decoder_session->bps+7) / 8)))
 573                         return false;
 574
 575                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels * ((decoder_session->bps+7) / 8)))) /* block align */
 576                         return false;
 577
 578                 if(!write_little_endian_uint16(f, (FLAC__uint16)(((decoder_session->bps+7)/8)*8))) /* bits per sample */
 579                         return false;
 580
 581                 if(is_waveformatextensible) {
 582                         if(!write_little_endian_uint16(f, (FLAC__uint16)22)) /* cbSize */
 583                                 return false;
 584
 585                         if(!write_little_endian_uint16(f, (FLAC__uint16)decoder_session->bps)) /* validBitsPerSample */
 586                                 return false;
 587
 588                         if(!write_little_endian_uint32(f, decoder_session->channel_mask))
 589                                 return false;
 590
 591                         /* GUID = {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}} */
 592                         if(flac__utils_fwrite("\x01\x00\x00\x00\x00\x00\x10\x00\x80\x00\x00\xaa\x00\x38\x9b\x71", 1, 16, f) != 16)
 593                                 return false;
 594                 }
 595
 596                 if(flac__utils_fwrite("data", 1, 4, f) != 4)
 597                         return false;
 598
 599                 if(!write_little_endian_uint32(f, (FLAC__uint32)data_size)) /* data size */
 600                         return false;
 601         }
 602         else {
 603                 if(flac__utils_fwrite("FORM", 1, 4, f) != 4)
 604                         return false;
 605
 606                 if(!write_big_endian_uint32(f, aligned_data_size+46)) /* filesize-8 */
 607                         return false;
 608
 609                 if(flac__utils_fwrite("AIFFCOMM", 1, 8, f) != 8)
 610                         return false;
 611
 612                 if(flac__utils_fwrite("\000\000\000\022", 1, 4, f) != 4) /* chunk size = 18 */
 613                         return false;
 614
 615                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 616                         return false;
 617
 618                 if(!write_big_endian_uint32(f, (FLAC__uint32)samples))
 619                         return false;
 620
 621                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->bps)))
 622                         return false;
 623
 624                 if(!write_sane_extended(f, decoder_session->sample_rate))
 625                         return false;
 626
 627                 if(flac__utils_fwrite("SSND", 1, 4, f) != 4)
 628                         return false;
 629
 630                 if(!write_big_endian_uint32(f, (FLAC__uint32)data_size+8)) /* data size */
 631                         return false;
 632
 633                 if(!write_big_endian_uint32(f, 0/*offset*/))
 634                         return false;
 635
 636                 if(!write_big_endian_uint32(f, 0/*block_size*/))
 637                         return false;
 638         }
 639
 640         return true;
 641 }
 642
 643 FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val)
 644 {
 645         FLAC__byte *b = (FLAC__byte*)(&val);
 646         if(is_big_endian_host_) {
 647                 FLAC__byte tmp;
 648                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 649         }
 650         return flac__utils_fwrite(b, 1, 2, f) == 2;
 651 }
 652
 653 FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val)
 654 {
 655         FLAC__byte *b = (FLAC__byte*)(&val);
 656         if(is_big_endian_host_) {
 657                 FLAC__byte tmp;
 658                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 659                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 660         }
 661         return flac__utils_fwrite(b, 1, 4, f) == 4;
 662 }
 663
 664 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
 665 {
 666         FLAC__byte *b = (FLAC__byte*)(&val);
 667         if(!is_big_endian_host_) {
 668                 FLAC__byte tmp;
 669                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 670         }
 671         return flac__utils_fwrite(b, 1, 2, f) == 2;
 672 }
 673
 674 FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val)
 675 {
 676         FLAC__byte *b = (FLAC__byte*)(&val);
 677         if(!is_big_endian_host_) {
 678                 FLAC__byte tmp;
 679                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 680                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 681         }
 682         return flac__utils_fwrite(b, 1, 4, f) == 4;
 683 }
 684
 685 FLAC__bool write_sane_extended(FILE *f, unsigned val)
 686         /* Write to 'f' a SANE extended representation of 'val'.  Return false if
 687         * the write succeeds; return true otherwise.
 688         *
 689         * SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
 690         * of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
 691         * representations, it does not imply a 1 above the MSB of the significand.
 692         *
 693         * Preconditions:
 694         *  val!=0U
 695         */
 696 {
 697         unsigned int shift, exponent;
 698
 699         FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */
 700
 701         for(shift= 0U; (val>>(31-shift))==0U; ++shift)
 702                 ;
 703         val<<= shift;
 704         exponent= 63U-(shift+32U); /* add 32 for unused second word */
 705
 706         if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
 707                 return false;
 708         if(!write_big_endian_uint32(f, val))
 709                 return false;
 710         if(!write_big_endian_uint32(f, 0)) /* unused second word */
 711                 return false;
 712
 713         return true;
 714 }
 715
 716 FLAC__bool fixup_iff_headers(DecoderSession *d)
 717 {
 718         const char *fmt_desc = (d->is_wave_out? "WAVE" : "AIFF");
 719         FILE *f = fopen(d->outfilename, "r+b"); /* stream is positioned at beginning of file */
 720
 721         if(0 == f) {
 722                 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));
 723                 return false;
 724         }
 725
 726         if(!write_iff_headers(f, d, d->samples_processed)) {
 727                 fclose(f);
 728                 return false;
 729         }
 730
 731         fclose(f);
 732         return true;
 733 }
 734
 735 FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 736 {
 737         DecoderSession *decoder_session = (DecoderSession*)client_data;
 738         FILE *fout = decoder_session->fout;
 739         const unsigned bps = frame->header.bits_per_sample, channels = frame->header.channels;
 740         const unsigned shift = ((decoder_session->is_wave_out || decoder_session->is_aiff_out) && (bps%8)? 8-(bps%8): 0);
 741         FLAC__bool is_big_endian = (decoder_session->is_aiff_out? true : (decoder_session->is_wave_out? false : decoder_session->is_big_endian));
 742         FLAC__bool is_unsigned_samples = (decoder_session->is_aiff_out? false : (decoder_session->is_wave_out? bps<=8 : decoder_session->is_unsigned_samples));
 743         unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
 744         static FLAC__int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * sizeof(FLAC__int32)]; /* WATCHOUT: can be up to 2 megs */
 745         FLAC__uint8  *u8buffer  = (FLAC__uint8  *)s8buffer;
 746         FLAC__int16  *s16buffer = (FLAC__int16  *)s8buffer;
 747         FLAC__uint16 *u16buffer = (FLAC__uint16 *)s8buffer;
 748         FLAC__int32  *s32buffer = (FLAC__int32  *)s8buffer;
 749         FLAC__uint32 *u32buffer = (FLAC__uint32 *)s8buffer;
 750         size_t bytes_to_write = 0;
 751
 752         (void)decoder;
 753
 754         if(decoder_session->abort_flag)
 755                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 756
 757         /* sanity-check the bits-per-sample */
 758         if(decoder_session->bps) {
 759                 if(bps != decoder_session->bps) {
 760                         if(decoder_session->got_stream_info)
 761                                 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);
 762                         else
 763                                 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);
 764                         if(!decoder_session->continue_through_decode_errors)
 765                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 766                 }
 767         }
 768         else {
 769                 /* must not have gotten STREAMINFO, save the bps from the frame header */
 770                 FLAC__ASSERT(!decoder_session->got_stream_info);
 771                 decoder_session->bps = bps;
 772         }
 773
 774         /* sanity-check the #channels */
 775         if(decoder_session->channels) {
 776                 if(channels != decoder_session->channels) {
 777                         if(decoder_session->got_stream_info)
 778                                 flac__utils_printf(stderr, 1, "%s: ERROR, channels is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, channels, decoder_session->channels);
 779                         else
 780                                 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);
 781                         if(!decoder_session->continue_through_decode_errors)
 782                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 783                 }
 784         }
 785         else {
 786                 /* must not have gotten STREAMINFO, save the #channels from the frame header */
 787                 FLAC__ASSERT(!decoder_session->got_stream_info);
 788                 decoder_session->channels = channels;
 789         }
 790
 791         /* sanity-check the sample rate */
 792         if(decoder_session->sample_rate) {
 793                 if(frame->header.sample_rate != decoder_session->sample_rate) {
 794                         if(decoder_session->got_stream_info)
 795                                 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);
 796                         else
 797                                 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);
 798                         if(!decoder_session->continue_through_decode_errors)
 799                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 800                 }
 801         }
 802         else {
 803                 /* must not have gotten STREAMINFO, save the sample rate from the frame header */
 804                 FLAC__ASSERT(!decoder_session->got_stream_info);
 805                 decoder_session->sample_rate = frame->header.sample_rate;
 806         }
 807
 808         /*
 809          * limit the number of samples to accept based on --until
 810          */
 811         FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
 812         /* if we never got the total_samples from the metadata, the skip and until specs would never have been canonicalized, so protect against that: */
 813         if(decoder_session->skip_specification->is_relative) {
 814                 if(decoder_session->skip_specification->value.samples == 0) /* special case for when no --skip was given */
 815                         decoder_session->skip_specification->is_relative = false; /* convert to our meaning of beginning-of-stream */
 816                 else {
 817                         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);
 818                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 819                 }
 820         }
 821         if(decoder_session->until_specification->is_relative) {
 822                 if(decoder_session->until_specification->value.samples == 0) /* special case for when no --until was given */
 823                         decoder_session->until_specification->is_relative = false; /* convert to our meaning of end-of-stream */
 824                 else {
 825                         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);
 826                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 827                 }
 828         }
 829         FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
 830         FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
 831         if(decoder_session->until_specification->value.samples > 0) {
 832                 const FLAC__uint64 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
 833                 const FLAC__uint64 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
 834                 const FLAC__uint64 input_samples_passed = skip + decoder_session->samples_processed;
 835                 FLAC__ASSERT(until >= input_samples_passed);
 836                 if(input_samples_passed + wide_samples > until)
 837                         wide_samples = (unsigned)(until - input_samples_passed);
 838                 if (wide_samples == 0) {
 839                         decoder_session->abort_flag = true;
 840                         decoder_session->aborting_due_to_until = true;
 841                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 842                 }
 843         }
 844
 845         if(wide_samples > 0) {
 846                 decoder_session->samples_processed += wide_samples;
 847                 decoder_session->frame_counter++;
 848
 849                 if(!(decoder_session->frame_counter & 0x3f))
 850                         print_stats(decoder_session);
 851
 852                 if(decoder_session->analysis_mode) {
 853                         flac__analyze_frame(frame, decoder_session->frame_counter-1, decoder_session->aopts, fout);
 854                 }
 855                 else if(!decoder_session->test_only) {
 856                         if(shift && !decoder_session->replaygain.apply) {
 857                                 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 858                                         for(channel = 0; channel < channels; channel++)
 859                                                 ((FLAC__int32**)buffer)[channel][wide_sample] <<= shift;/*@@@@@@un-const'ing the buffer is hacky but safe*/
 860                         }
 861                         if(decoder_session->replaygain.apply) {
 862                                 bytes_to_write = FLAC__replaygain_synthesis__apply_gain(
 863                                         u8buffer,
 864                                         !is_big_endian,
 865                                         is_unsigned_samples,
 866                                         buffer,
 867                                         wide_samples,
 868                                         channels,
 869                                         bps, /* source_bps */
 870                                         bps+shift, /* target_bps */
 871                                         decoder_session->replaygain.scale,
 872                                         decoder_session->replaygain.spec.limiter == RGSS_LIMIT__HARD, /* hard_limit */
 873                                         decoder_session->replaygain.spec.noise_shaping != NOISE_SHAPING_NONE, /* do_dithering */
 874                                         &decoder_session->replaygain.dither_context
 875                                 );
 876                         }
 877                         else if(bps+shift == 8) {
 878                                 if(is_unsigned_samples) {
 879                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 880                                                 for(channel = 0; channel < channels; channel++, sample++)
 881                                                         u8buffer[sample] = (FLAC__uint8)(buffer[channel][wide_sample] + 0x80);
 882                                 }
 883                                 else {
 884                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 885                                                 for(channel = 0; channel < channels; channel++, sample++)
 886                                                         s8buffer[sample] = (FLAC__int8)(buffer[channel][wide_sample]);
 887                                 }
 888                                 bytes_to_write = sample;
 889                         }
 890                         else if(bps+shift == 16) {
 891                                 if(is_unsigned_samples) {
 892                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 893                                                 for(channel = 0; channel < channels; channel++, sample++)
 894                                                         u16buffer[sample] = (FLAC__uint16)(buffer[channel][wide_sample] + 0x8000);
 895                                 }
 896                                 else {
 897                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 898                                                 for(channel = 0; channel < channels; channel++, sample++)
 899                                                         s16buffer[sample] = (FLAC__int16)(buffer[channel][wide_sample]);
 900                                 }
 901                                 if(is_big_endian != is_big_endian_host_) {
 902                                         unsigned char tmp;
 903                                         const unsigned bytes = sample * 2;
 904                                         for(byte = 0; byte < bytes; byte += 2) {
 905                                                 tmp = u8buffer[byte];
 906                                                 u8buffer[byte] = u8buffer[byte+1];
 907                                                 u8buffer[byte+1] = tmp;
 908                                         }
 909                                 }
 910                                 bytes_to_write = 2 * sample;
 911                         }
 912                         else if(bps+shift == 24) {
 913                                 if(is_unsigned_samples) {
 914                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 915                                                 for(channel = 0; channel < channels; channel++, sample++)
 916                                                         u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
 917                                 }
 918                                 else {
 919                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 920                                                 for(channel = 0; channel < channels; channel++, sample++)
 921                                                         s32buffer[sample] = buffer[channel][wide_sample];
 922                                 }
 923                                 if(is_big_endian != is_big_endian_host_) {
 924                                         unsigned char tmp;
 925                                         const unsigned bytes = sample * 4;
 926                                         for(byte = 0; byte < bytes; byte += 4) {
 927                                                 tmp = u8buffer[byte];
 928                                                 u8buffer[byte] = u8buffer[byte+3];
 929                                                 u8buffer[byte+3] = tmp;
 930                                                 tmp = u8buffer[byte+1];
 931                                                 u8buffer[byte+1] = u8buffer[byte+2];
 932                                                 u8buffer[byte+2] = tmp;
 933                                         }
 934                                 }
 935                                 if(is_big_endian) {
 936                                         unsigned lbyte;
 937                                         const unsigned bytes = sample * 4;
 938                                         for(lbyte = byte = 0; byte < bytes; ) {
 939                                                 byte++;
 940                                                 u8buffer[lbyte++] = u8buffer[byte++];
 941                                                 u8buffer[lbyte++] = u8buffer[byte++];
 942                                                 u8buffer[lbyte++] = u8buffer[byte++];
 943                                         }
 944                                 }
 945                                 else {
 946                                         unsigned lbyte;
 947                                         const unsigned bytes = sample * 4;
 948                                         for(lbyte = byte = 0; byte < bytes; ) {
 949                                                 u8buffer[lbyte++] = u8buffer[byte++];
 950                                                 u8buffer[lbyte++] = u8buffer[byte++];
 951                                                 u8buffer[lbyte++] = u8buffer[byte++];
 952                                                 byte++;
 953                                         }
 954                                 }
 955                                 bytes_to_write = 3 * sample;
 956                         }
 957                         else {
 958                                 FLAC__ASSERT(0);
 959                                 /* double protection */
 960                                 decoder_session->abort_flag = true;
 961                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 962                         }
 963                 }
 964         }
 965         if(bytes_to_write > 0) {
 966                 if(flac__utils_fwrite(u8buffer, 1, bytes_to_write, fout) != bytes_to_write) {
 967                         /* if a pipe closed when writing to stdout, we let it go without an error message */
 968                         if(errno == EPIPE && decoder_session->fout == stdout)
 969                                 decoder_session->aborting_due_to_until = true;
 970                         decoder_session->abort_flag = true;
 971                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 972                 }
 973         }
 974         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
 975 }
 976
 977 void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
 978 {
 979         DecoderSession *decoder_session = (DecoderSession*)client_data;
 980         (void)decoder;
 981         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
 982                 FLAC__uint64 skip, until;
 983                 decoder_session->got_stream_info = true;
 984                 decoder_session->bps = metadata->data.stream_info.bits_per_sample;
 985                 decoder_session->channels = metadata->data.stream_info.channels;
 986                 decoder_session->sample_rate = metadata->data.stream_info.sample_rate;
 987
 988                 flac__utils_canonicalize_skip_until_specification(decoder_session->skip_specification, decoder_session->sample_rate);
 989                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
 990                 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
 991
 992                 /* remember, metadata->data.stream_info.total_samples can be 0, meaning 'unknown' */
 993                 if(metadata->data.stream_info.total_samples > 0 && skip >= metadata->data.stream_info.total_samples) {
 994                         flac__utils_printf(stderr, 1, "%s: ERROR trying to --skip more samples than in stream\n", decoder_session->inbasefilename);
 995                         decoder_session->abort_flag = true;
 996                         return;
 997                 }
 998                 else if(metadata->data.stream_info.total_samples == 0 && skip > 0) {
 999                         flac__utils_printf(stderr, 1, "%s: ERROR, can't --skip when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1000                         decoder_session->abort_flag = true;
1001                         return;
1002                 }
1003                 FLAC__ASSERT(skip == 0 || 0 == decoder_session->cue_specification);
1004                 decoder_session->total_samples = metadata->data.stream_info.total_samples - skip;
1005
1006                 /* note that we use metadata->data.stream_info.total_samples instead of decoder_session->total_samples */
1007                 if(!canonicalize_until_specification(decoder_session->until_specification, decoder_session->inbasefilename, decoder_session->sample_rate, skip, metadata->data.stream_info.total_samples)) {
1008                         decoder_session->abort_flag = true;
1009                         return;
1010                 }
1011                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1012                 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1013
1014                 if(until > 0) {
1015                         FLAC__ASSERT(decoder_session->total_samples != 0);
1016                         FLAC__ASSERT(0 == decoder_session->cue_specification);
1017                         decoder_session->total_samples -= (metadata->data.stream_info.total_samples - until);
1018                 }
1019
1020                 if(decoder_session->bps < 4 || decoder_session->bps > 24) {
1021                         flac__utils_printf(stderr, 1, "%s: ERROR: bits per sample is %u, must be 4-24\n", decoder_session->inbasefilename, decoder_session->bps);
1022                         decoder_session->abort_flag = true;
1023                         return;
1024                 }
1025         }
1026         else if(metadata->type == FLAC__METADATA_TYPE_CUESHEET) {
1027                 /* remember, at this point, decoder_session->total_samples can be 0, meaning 'unknown' */
1028                 if(decoder_session->total_samples == 0) {
1029                         flac__utils_printf(stderr, 1, "%s: ERROR can't use --cue when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1030                         decoder_session->abort_flag = true;
1031                         return;
1032                 }
1033
1034                 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);
1035
1036                 FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1037                 FLAC__ASSERT(decoder_session->skip_specification->value_is_samples);
1038
1039                 FLAC__ASSERT(!decoder_session->until_specification->is_relative);
1040                 FLAC__ASSERT(decoder_session->until_specification->value_is_samples);
1041
1042                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1043                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1044                 FLAC__ASSERT((FLAC__uint64)decoder_session->until_specification->value.samples <= decoder_session->total_samples);
1045                 FLAC__ASSERT(decoder_session->skip_specification->value.samples <= decoder_session->until_specification->value.samples);
1046
1047                 decoder_session->total_samples = decoder_session->until_specification->value.samples - decoder_session->skip_specification->value.samples;
1048         }
1049         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
1050                 if (decoder_session->replaygain.spec.apply) {
1051                         double reference, gain, peak;
1052                         if (!(decoder_session->replaygain.apply = grabbag__replaygain_load_from_vorbiscomment(metadata, decoder_session->replaygain.spec.use_album_gain, /*strict=*/false, &reference, &gain, &peak))) {
1053                                 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");
1054                         }
1055                         else {
1056                                 const char *ls[] = { "no", "peak", "hard" };
1057                                 const char *ns[] = { "no", "low", "medium", "high" };
1058                                 decoder_session->replaygain.scale = grabbag__replaygain_compute_scale_factor(peak, gain, decoder_session->replaygain.spec.preamp, decoder_session->replaygain.spec.limiter == RGSS_LIMIT__PEAK);
1059                                 FLAC__ASSERT(decoder_session->bps > 0 && decoder_session->bps <= 32);
1060                                 FLAC__replaygain_synthesis__init_dither_context(&decoder_session->replaygain.dither_context, decoder_session->bps, decoder_session->replaygain.spec.noise_shaping);
1061                                 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]);
1062                                 flac__utils_printf(stderr, 1, "%s: WARNING: applying ReplayGain is not lossless\n", decoder_session->inbasefilename);
1063                         }
1064                 }
1065                 (void)flac__utils_get_channel_mask_tag(metadata, &decoder_session->channel_mask);
1066         }
1067 }
1068
1069 void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1070 {
1071         DecoderSession *decoder_session = (DecoderSession*)client_data;
1072         (void)decoder;
1073         flac__utils_printf(stderr, 1, "%s: *** Got error code %d:%s\n", decoder_session->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1074         if(!decoder_session->continue_through_decode_errors) {
1075                 decoder_session->abort_flag = true;
1076                 if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
1077                         decoder_session->aborting_due_to_unparseable = true;
1078         }
1079 }
1080
1081 void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status)
1082 {
1083         const int ilen = strlen(d->inbasefilename) + 1;
1084
1085         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1086
1087         flac__utils_printf(stderr, 1, "%*s init status = %s\n", ilen, "", FLAC__StreamDecoderInitStatusString[init_status]);
1088
1089         /* print out some more info for some errors: */
1090         if (init_status == FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE) {
1091                 flac__utils_printf(stderr, 1,
1092                         "\n"
1093                         "An error occurred opening the input file; it is likely that it does not exist\n"
1094                         "or is not readable.\n"
1095                 );
1096         }
1097 }
1098
1099 void print_error_with_state(const DecoderSession *d, const char *message)
1100 {
1101         const int ilen = strlen(d->inbasefilename) + 1;
1102
1103         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1104         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", FLAC__stream_decoder_get_resolved_state_string(d->decoder));
1105
1106         /* print out some more info for some errors: */
1107         if (d->aborting_due_to_unparseable) {
1108                 flac__utils_printf(stderr, 1,
1109                         "\n"
1110                         "The FLAC stream may have been created by a more advanced encoder.  Try\n"
1111                         "  metaflac --show-vendor-tag %s\n"
1112                         "If the version number is greater than %s, this decoder is probably\n"
1113                         "not able to decode the file.  If the version number is not, the file\n"
1114                         "may be corrupted, or you may have found a bug.  In this case please\n"
1115                         "submit a bug report to\n"
1116                         "    http://sourceforge.net/bugs/?func=addbug&group_id=13478\n"
1117                         "Make sure to use the \"Monitor\" feature to monitor the bug status.\n",
1118                         d->inbasefilename, FLAC__VERSION_STRING
1119                 );
1120         }
1121 }
1122
1123 void print_stats(const DecoderSession *decoder_session)
1124 {
1125         if(flac__utils_verbosity_ >= 2) {
1126 #if defined _MSC_VER || defined __MINGW32__
1127                 /* with MSVC you have to spoon feed it the casting */
1128                 const double progress = (double)(FLAC__int64)decoder_session->samples_processed / (double)(FLAC__int64)decoder_session->total_samples * 100.0;
1129 #else
1130                 const double progress = (double)decoder_session->samples_processed / (double)decoder_session->total_samples * 100.0;
1131 #endif
1132                 if(decoder_session->total_samples > 0) {
1133                         fprintf(stderr, "\r%s: %s%u%% complete",
1134                                 decoder_session->inbasefilename,
1135                                 decoder_session->test_only? "testing, " : decoder_session->analysis_mode? "analyzing, " : "",
1136                                 (unsigned)floor(progress + 0.5)
1137                         );
1138                 }
1139                 else {
1140                         fprintf(stderr, "\r%s: %s %u samples",
1141                                 decoder_session->inbasefilename,
1142                                 decoder_session->test_only? "tested" : decoder_session->analysis_mode? "analyzed" : "wrote",
1143                                 (unsigned)decoder_session->samples_processed
1144                         );
1145                 }
1146         }
1147 }