src/flac/decode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  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 <= 1600 /* @@@ [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 #if 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 treat_warnings_as_errors;
  53         FLAC__bool continue_through_decode_errors;
  54         FLAC__bool channel_map_none;
  55
  56         struct {
  57                 replaygain_synthesis_spec_t spec;
  58                 FLAC__bool apply; /* 'spec.apply' is just a request; this 'apply' means we actually parsed the RG tags and are ready to go */
  59                 double scale;
  60                 DitherContext dither_context;
  61         } replaygain;
  62
  63         FLAC__bool test_only;
  64         FLAC__bool analysis_mode;
  65         analysis_options aopts;
  66         utils__SkipUntilSpecification *skip_specification;
  67         utils__SkipUntilSpecification *until_specification; /* a canonicalized value of 0 mean end-of-stream (i.e. --until=-0) */
  68         utils__CueSpecification *cue_specification;
  69
  70         const char *inbasefilename;
  71         const char *outfilename;
  72
  73         FLAC__uint64 samples_processed;
  74         unsigned frame_counter;
  75         FLAC__bool abort_flag;
  76         FLAC__bool aborting_due_to_until; /* true if we intentionally abort decoding prematurely because we hit the --until point */
  77         FLAC__bool aborting_due_to_unparseable; /* true if we abort decoding because we hit an unparseable frame */
  78
  79         FLAC__bool iff_headers_need_fixup;
  80
  81         FLAC__bool is_big_endian;
  82         FLAC__bool is_unsigned_samples;
  83         FLAC__bool got_stream_info;
  84         FLAC__bool has_md5sum;
  85         FLAC__uint64 total_samples;
  86         unsigned bps;
  87         unsigned channels;
  88         unsigned sample_rate;
  89         FLAC__uint32 channel_mask;
  90
  91         /* these are used only in analyze mode */
  92         FLAC__uint64 decode_position;
  93
  94         FLAC__StreamDecoder *decoder;
  95
  96         FILE *fout;
  97 } DecoderSession;
  98
  99
 100 static FLAC__bool is_big_endian_host_;
 101
 102
 103 /*
 104  * local routines
 105  */
 106 static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, 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);
 107 static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
 108 static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, decode_options_t decode_options, const char *infilename);
 109 static FLAC__bool DecoderSession_process(DecoderSession *d);
 110 static int DecoderSession_finish_ok(DecoderSession *d);
 111 static int DecoderSession_finish_error(DecoderSession *d);
 112 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input);
 113 static FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples);
 114 static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val);
 115 static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val);
 116 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 117 static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val);
 118 static FLAC__bool write_sane_extended(FILE *f, unsigned val);
 119 static FLAC__bool fixup_iff_headers(DecoderSession *d);
 120 static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 121 static void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 122 static void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 123 static void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status);
 124 static void print_error_with_state(const DecoderSession *d, const char *message);
 125 static void print_stats(const DecoderSession *decoder_session);
 126
 127
 128 /*
 129  * public routines
 130  */
 131 int flac__decode_aiff(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 132 {
 133         DecoderSession decoder_session;
 134
 135         if(!
 136                 DecoderSession_construct(
 137                         &decoder_session,
 138 #if FLAC__HAS_OGG
 139                         options.common.is_ogg,
 140 #else
 141                         /*is_ogg=*/false,
 142 #endif
 143                         /*is_aiff_out=*/true,
 144                         /*is_wave_out=*/false,
 145                         options.common.treat_warnings_as_errors,
 146                         options.common.continue_through_decode_errors,
 147                         options.common.channel_map_none,
 148                         options.common.replaygain_synthesis_spec,
 149                         analysis_mode,
 150                         aopts,
 151                         &options.common.skip_specification,
 152                         &options.common.until_specification,
 153                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 154                         infilename,
 155                         outfilename
 156                 )
 157         )
 158                 return 1;
 159
 160         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 161                 return DecoderSession_finish_error(&decoder_session);
 162
 163         if(!DecoderSession_process(&decoder_session))
 164                 return DecoderSession_finish_error(&decoder_session);
 165
 166         return DecoderSession_finish_ok(&decoder_session);
 167 }
 168
 169 int flac__decode_wav(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, wav_decode_options_t options)
 170 {
 171         DecoderSession decoder_session;
 172
 173         if(!
 174                 DecoderSession_construct(
 175                         &decoder_session,
 176 #if FLAC__HAS_OGG
 177                         options.common.is_ogg,
 178 #else
 179                         /*is_ogg=*/false,
 180 #endif
 181                         /*is_aiff_out=*/false,
 182                         /*is_wave_out=*/true,
 183                         options.common.treat_warnings_as_errors,
 184                         options.common.continue_through_decode_errors,
 185                         options.common.channel_map_none,
 186                         options.common.replaygain_synthesis_spec,
 187                         analysis_mode,
 188                         aopts,
 189                         &options.common.skip_specification,
 190                         &options.common.until_specification,
 191                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 192                         infilename,
 193                         outfilename
 194                 )
 195         )
 196                 return 1;
 197
 198         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 199                 return DecoderSession_finish_error(&decoder_session);
 200
 201         if(!DecoderSession_process(&decoder_session))
 202                 return DecoderSession_finish_error(&decoder_session);
 203
 204         return DecoderSession_finish_ok(&decoder_session);
 205 }
 206
 207 int flac__decode_raw(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, raw_decode_options_t options)
 208 {
 209         DecoderSession decoder_session;
 210
 211         decoder_session.is_big_endian = options.is_big_endian;
 212         decoder_session.is_unsigned_samples = options.is_unsigned_samples;
 213
 214         if(!
 215                 DecoderSession_construct(
 216                         &decoder_session,
 217 #if FLAC__HAS_OGG
 218                         options.common.is_ogg,
 219 #else
 220                         /*is_ogg=*/false,
 221 #endif
 222                         /*is_aiff_out=*/false,
 223                         /*is_wave_out=*/false,
 224                         options.common.treat_warnings_as_errors,
 225                         options.common.continue_through_decode_errors,
 226                         options.common.channel_map_none,
 227                         options.common.replaygain_synthesis_spec,
 228                         analysis_mode,
 229                         aopts,
 230                         &options.common.skip_specification,
 231                         &options.common.until_specification,
 232                         options.common.has_cue_specification? &options.common.cue_specification : 0,
 233                         infilename,
 234                         outfilename
 235                 )
 236         )
 237                 return 1;
 238
 239         if(!DecoderSession_init_decoder(&decoder_session, options.common, infilename))
 240                 return DecoderSession_finish_error(&decoder_session);
 241
 242         if(!DecoderSession_process(&decoder_session))
 243                 return DecoderSession_finish_error(&decoder_session);
 244
 245         return DecoderSession_finish_ok(&decoder_session);
 246 }
 247
 248 FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool is_aiff_out, FLAC__bool is_wave_out, FLAC__bool treat_warnings_as_errors, 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)
 249 {
 250 #if FLAC__HAS_OGG
 251         d->is_ogg = is_ogg;
 252 #else
 253         (void)is_ogg;
 254 #endif
 255
 256         d->is_aiff_out = is_aiff_out;
 257         d->is_wave_out = is_wave_out;
 258         d->treat_warnings_as_errors = treat_warnings_as_errors;
 259         d->continue_through_decode_errors = continue_through_decode_errors;
 260         d->channel_map_none = channel_map_none;
 261         d->replaygain.spec = replaygain_synthesis_spec;
 262         d->replaygain.apply = false;
 263         d->replaygain.scale = 0.0;
 264         /* d->replaygain.dither_context gets initialized later once we know the sample resolution */
 265         d->test_only = (0 == outfilename);
 266         d->analysis_mode = analysis_mode;
 267         d->aopts = aopts;
 268         d->skip_specification = skip_specification;
 269         d->until_specification = until_specification;
 270         d->cue_specification = cue_specification;
 271
 272         d->inbasefilename = grabbag__file_get_basename(infilename);
 273         d->outfilename = outfilename;
 274
 275         d->samples_processed = 0;
 276         d->frame_counter = 0;
 277         d->abort_flag = false;
 278         d->aborting_due_to_until = false;
 279         d->aborting_due_to_unparseable = false;
 280
 281         d->iff_headers_need_fixup = false;
 282
 283         d->total_samples = 0;
 284         d->got_stream_info = false;
 285         d->has_md5sum = false;
 286         d->bps = 0;
 287         d->channels = 0;
 288         d->sample_rate = 0;
 289         d->channel_mask = 0;
 290
 291         d->decode_position = 0;
 292
 293         d->decoder = 0;
 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__StreamDecoderInitStatus init_status;
 330         FLAC__uint32 test = 1;
 331
 332         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
 333
 334         decoder_session->decoder = FLAC__stream_decoder_new();
 335
 336         if(0 == decoder_session->decoder) {
 337                 flac__utils_printf(stderr, 1, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 338                 return false;
 339         }
 340
 341         FLAC__stream_decoder_set_md5_checking(decoder_session->decoder, true);
 342         if (0 != decoder_session->cue_specification)
 343                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_CUESHEET);
 344         if (decoder_session->replaygain.spec.apply)
 345                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 346
 347 #if FLAC__HAS_OGG
 348         if(decoder_session->is_ogg) {
 349                 if(!decode_options.use_first_serial_number)
 350                         FLAC__stream_decoder_set_ogg_serial_number(decoder_session->decoder, decode_options.serial_number);
 351                 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);
 352         }
 353         else
 354 #else
 355         (void)decode_options;
 356 #endif
 357         {
 358                 init_status = FLAC__stream_decoder_init_file(decoder_session->decoder, strcmp(infilename, "-")? infilename : 0, write_callback, metadata_callback, error_callback, /*client_data=*/decoder_session);
 359         }
 360
 361         if(init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
 362                 print_error_with_init_status(decoder_session, "ERROR initializing decoder", init_status);
 363                 return false;
 364         }
 365
 366         return true;
 367 }
 368
 369 FLAC__bool DecoderSession_process(DecoderSession *d)
 370 {
 371         if(!FLAC__stream_decoder_process_until_end_of_metadata(d->decoder)) {
 372                 flac__utils_printf(stderr, 2, "\n");
 373                 print_error_with_state(d, "ERROR while decoding metadata");
 374                 return false;
 375         }
 376         if(FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM) {
 377                 flac__utils_printf(stderr, 2, "\n");
 378                 print_error_with_state(d, "ERROR during metadata decoding");
 379                 if(!d->continue_through_decode_errors)
 380                         return false;
 381         }
 382
 383         if(d->abort_flag)
 384                 return false;
 385
 386         /* set channel mapping */
 387         if(!d->channel_map_none) {
 388                 /* currently FLAC order matches SMPTE/WAVEFORMATEXTENSIBLE order, so no reordering is necessary; see encode.c */
 389                 /* only the channel mask must be set if it was not already picked up from the WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag */
 390                 if(d->channels == 1) {
 391                         if(d->channel_mask == 0)
 392                                 d->channel_mask = 0x0001;
 393                 }
 394                 else if(d->channels == 2) {
 395                         if(d->channel_mask == 0)
 396                                 d->channel_mask = 0x0003;
 397                 }
 398                 else if(d->channels == 3) {
 399                         if(d->channel_mask == 0)
 400                                 d->channel_mask = 0x0007;
 401                 }
 402                 else if(d->channels == 4) {
 403                         if(d->channel_mask == 0)
 404                                 d->channel_mask = 0x0033;
 405                 }
 406                 else if(d->channels == 5) {
 407                         if(d->channel_mask == 0)
 408                                 d->channel_mask = 0x0607;
 409                 }
 410                 else if(d->channels == 6) {
 411                         if(d->channel_mask == 0)
 412                                 d->channel_mask = 0x060f;
 413                 }
 414         }
 415
 416         /* write the WAVE/AIFF headers if necessary */
 417         if(!d->analysis_mode && !d->test_only && (d->is_wave_out || d->is_aiff_out)) {
 418                 if(!write_iff_headers(d->fout, d, d->total_samples)) {
 419                         d->abort_flag = true;
 420                         return false;
 421                 }
 422         }
 423
 424         if(d->skip_specification->value.samples > 0) {
 425                 const FLAC__uint64 skip = (FLAC__uint64)d->skip_specification->value.samples;
 426
 427                 if(!FLAC__stream_decoder_seek_absolute(d->decoder, skip)) {
 428                         print_error_with_state(d, "ERROR seeking while skipping bytes");
 429                         return false;
 430                 }
 431         }
 432         if(!FLAC__stream_decoder_process_until_end_of_stream(d->decoder) && !d->aborting_due_to_until) {
 433                 flac__utils_printf(stderr, 2, "\n");
 434                 print_error_with_state(d, "ERROR while decoding data");
 435                 if(!d->continue_through_decode_errors)
 436                         return false;
 437         }
 438         if(
 439                 (d->abort_flag && !(d->aborting_due_to_until || d->continue_through_decode_errors)) ||
 440                 (FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM && !d->aborting_due_to_until)
 441         ) {
 442                 flac__utils_printf(stderr, 2, "\n");
 443                 print_error_with_state(d, "ERROR during decoding");
 444                 return false;
 445         }
 446
 447         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)) {
 448                 if(flac__utils_fwrite("\000", 1, 1, d->fout) != 1) {
 449                         print_error_with_state(d, d->is_wave_out?
 450                                 "ERROR writing pad byte to WAVE data chunk" :
 451                                 "ERROR writing pad byte to AIFF SSND chunk"
 452                         );
 453                         return false;
 454                 }
 455         }
 456
 457         return true;
 458 }
 459
 460 int DecoderSession_finish_ok(DecoderSession *d)
 461 {
 462         FLAC__bool ok = true, md5_failure = false;
 463
 464         if(d->decoder) {
 465                 md5_failure = !FLAC__stream_decoder_finish(d->decoder) && !d->aborting_due_to_until;
 466                 print_stats(d);
 467                 FLAC__stream_decoder_delete(d->decoder);
 468         }
 469         if(d->analysis_mode)
 470                 flac__analyze_finish(d->aopts);
 471         if(md5_failure) {
 472                 flac__utils_printf(stderr, 1, "\r%s: ERROR, MD5 signature mismatch\n", d->inbasefilename);
 473                 ok = d->continue_through_decode_errors;
 474         }
 475         else {
 476                 if(!d->got_stream_info) {
 477                         flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since there was no STREAMINFO\n", d->inbasefilename);
 478                         ok = !d->treat_warnings_as_errors;
 479                 }
 480                 else if(!d->has_md5sum) {
 481                         flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since it was unset in the STREAMINFO\n", d->inbasefilename);
 482                         ok = !d->treat_warnings_as_errors;
 483                 }
 484                 flac__utils_printf(stderr, 2, "\r%s: %s         \n", d->inbasefilename, d->test_only? "ok           ":d->analysis_mode?"done           ":"done");
 485         }
 486         DecoderSession_destroy(d, /*error_occurred=*/!ok);
 487         if(!d->test_only && (d->is_wave_out || d->is_aiff_out) && (d->iff_headers_need_fixup || (!d->got_stream_info && strcmp(d->outfilename, "-"))))
 488                 if(!fixup_iff_headers(d))
 489                         return 1;
 490         return ok? 0 : 1;
 491 }
 492
 493 int DecoderSession_finish_error(DecoderSession *d)
 494 {
 495         if(d->decoder) {
 496                 (void)FLAC__stream_decoder_finish(d->decoder);
 497                 FLAC__stream_decoder_delete(d->decoder);
 498         }
 499         if(d->analysis_mode)
 500                 flac__analyze_finish(d->aopts);
 501         DecoderSession_destroy(d, /*error_occurred=*/true);
 502         return 1;
 503 }
 504
 505 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
 506 {
 507         /* convert from mm:ss.sss to sample number if necessary */
 508         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
 509
 510         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
 511         if(spec->is_relative && spec->value.samples == 0) {
 512                 spec->is_relative = false;
 513                 return true;
 514         }
 515
 516         /* in any other case the total samples in the input must be known */
 517         if(total_samples_in_input == 0) {
 518                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when FLAC metadata has total sample count of 0\n", inbasefilename);
 519                 return false;
 520         }
 521
 522         FLAC__ASSERT(spec->value_is_samples);
 523
 524         /* convert relative specifications to absolute */
 525         if(spec->is_relative) {
 526                 if(spec->value.samples <= 0)
 527                         spec->value.samples += (FLAC__int64)total_samples_in_input;
 528                 else
 529                         spec->value.samples += skip;
 530                 spec->is_relative = false;
 531         }
 532
 533         /* error check */
 534         if(spec->value.samples < 0) {
 535                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
 536                 return false;
 537         }
 538         if((FLAC__uint64)spec->value.samples <= skip) {
 539                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
 540                 return false;
 541         }
 542         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
 543                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
 544                 return false;
 545         }
 546
 547         return true;
 548 }
 549
 550 FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples)
 551 {
 552         const char *fmt_desc = decoder_session->is_wave_out? "WAVE" : "AIFF";
 553         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);
 554         FLAC__uint64 data_size = samples * decoder_session->channels * ((decoder_session->bps+7)/8);
 555         const FLAC__uint32 aligned_data_size = (FLAC__uint32)((data_size+1) & (~1U)); /* we'll check for overflow later */
 556         if(samples == 0) {
 557                 if(f == stdout) {
 558                         flac__utils_printf(stderr, 1, "%s: WARNING, don't have accurate sample count available for %s header.\n", decoder_session->inbasefilename, fmt_desc);
 559                         flac__utils_printf(stderr, 1, "             Generated %s file will have a data chunk size of 0.  Try\n", fmt_desc);
 560                         flac__utils_printf(stderr, 1, "             decoding directly to a file instead.\n");
 561                         if(decoder_session->treat_warnings_as_errors)
 562                                 return false;
 563                 }
 564                 else {
 565                         decoder_session->iff_headers_need_fixup = true;
 566                 }
 567         }
 568         if(data_size >= 0xFFFFFFDC) {
 569                 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);
 570                 return false;
 571         }
 572         if(decoder_session->is_wave_out) {
 573                 if(flac__utils_fwrite("RIFF", 1, 4, f) != 4)
 574                         return false;
 575
 576                 if(!write_little_endian_uint32(f, aligned_data_size+(is_waveformatextensible?60:36))) /* filesize-8 */
 577                         return false;
 578
 579                 if(flac__utils_fwrite("WAVEfmt ", 1, 8, f) != 8)
 580                         return false;
 581
 582                 if(!write_little_endian_uint32(f, is_waveformatextensible? 40 : 16)) /* chunk size */
 583                         return false;
 584
 585                 if(!write_little_endian_uint16(f, (FLAC__uint16)(is_waveformatextensible? 65534 : 1))) /* compression code */
 586                         return false;
 587
 588                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 589                         return false;
 590
 591                 if(!write_little_endian_uint32(f, decoder_session->sample_rate))
 592                         return false;
 593
 594                 if(!write_little_endian_uint32(f, decoder_session->sample_rate * decoder_session->channels * ((decoder_session->bps+7) / 8)))
 595                         return false;
 596
 597                 if(!write_little_endian_uint16(f, (FLAC__uint16)(decoder_session->channels * ((decoder_session->bps+7) / 8)))) /* block align */
 598                         return false;
 599
 600                 if(!write_little_endian_uint16(f, (FLAC__uint16)(((decoder_session->bps+7)/8)*8))) /* bits per sample */
 601                         return false;
 602
 603                 if(is_waveformatextensible) {
 604                         if(!write_little_endian_uint16(f, (FLAC__uint16)22)) /* cbSize */
 605                                 return false;
 606
 607                         if(!write_little_endian_uint16(f, (FLAC__uint16)decoder_session->bps)) /* validBitsPerSample */
 608                                 return false;
 609
 610                         if(!write_little_endian_uint32(f, decoder_session->channel_mask))
 611                                 return false;
 612
 613                         /* GUID = {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}} */
 614                         if(flac__utils_fwrite("\x01\x00\x00\x00\x00\x00\x10\x00\x80\x00\x00\xaa\x00\x38\x9b\x71", 1, 16, f) != 16)
 615                                 return false;
 616                 }
 617
 618                 if(flac__utils_fwrite("data", 1, 4, f) != 4)
 619                         return false;
 620
 621                 if(!write_little_endian_uint32(f, (FLAC__uint32)data_size)) /* data size */
 622                         return false;
 623         }
 624         else {
 625                 if(flac__utils_fwrite("FORM", 1, 4, f) != 4)
 626                         return false;
 627
 628                 if(!write_big_endian_uint32(f, aligned_data_size+46)) /* filesize-8 */
 629                         return false;
 630
 631                 if(flac__utils_fwrite("AIFFCOMM", 1, 8, f) != 8)
 632                         return false;
 633
 634                 if(flac__utils_fwrite("\000\000\000\022", 1, 4, f) != 4) /* chunk size = 18 */
 635                         return false;
 636
 637                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->channels)))
 638                         return false;
 639
 640                 if(!write_big_endian_uint32(f, (FLAC__uint32)samples))
 641                         return false;
 642
 643                 if(!write_big_endian_uint16(f, (FLAC__uint16)(decoder_session->bps)))
 644                         return false;
 645
 646                 if(!write_sane_extended(f, decoder_session->sample_rate))
 647                         return false;
 648
 649                 if(flac__utils_fwrite("SSND", 1, 4, f) != 4)
 650                         return false;
 651
 652                 if(!write_big_endian_uint32(f, (FLAC__uint32)data_size+8)) /* data size */
 653                         return false;
 654
 655                 if(!write_big_endian_uint32(f, 0/*offset*/))
 656                         return false;
 657
 658                 if(!write_big_endian_uint32(f, 0/*block_size*/))
 659                         return false;
 660         }
 661
 662         return true;
 663 }
 664
 665 FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val)
 666 {
 667         FLAC__byte *b = (FLAC__byte*)(&val);
 668         if(is_big_endian_host_) {
 669                 FLAC__byte tmp;
 670                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 671         }
 672         return flac__utils_fwrite(b, 1, 2, f) == 2;
 673 }
 674
 675 FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val)
 676 {
 677         FLAC__byte *b = (FLAC__byte*)(&val);
 678         if(is_big_endian_host_) {
 679                 FLAC__byte tmp;
 680                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 681                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 682         }
 683         return flac__utils_fwrite(b, 1, 4, f) == 4;
 684 }
 685
 686 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
 687 {
 688         FLAC__byte *b = (FLAC__byte*)(&val);
 689         if(!is_big_endian_host_) {
 690                 FLAC__byte tmp;
 691                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 692         }
 693         return flac__utils_fwrite(b, 1, 2, f) == 2;
 694 }
 695
 696 FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val)
 697 {
 698         FLAC__byte *b = (FLAC__byte*)(&val);
 699         if(!is_big_endian_host_) {
 700                 FLAC__byte tmp;
 701                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 702                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 703         }
 704         return flac__utils_fwrite(b, 1, 4, f) == 4;
 705 }
 706
 707 FLAC__bool write_sane_extended(FILE *f, unsigned val)
 708         /* Write to 'f' a SANE extended representation of 'val'.  Return false if
 709         * the write succeeds; return true otherwise.
 710         *
 711         * SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
 712         * of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
 713         * representations, it does not imply a 1 above the MSB of the significand.
 714         *
 715         * Preconditions:
 716         *  val!=0U
 717         */
 718 {
 719         unsigned int shift, exponent;
 720
 721         FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */
 722
 723         for(shift= 0U; (val>>(31-shift))==0U; ++shift)
 724                 ;
 725         val<<= shift;
 726         exponent= 63U-(shift+32U); /* add 32 for unused second word */
 727
 728         if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
 729                 return false;
 730         if(!write_big_endian_uint32(f, val))
 731                 return false;
 732         if(!write_big_endian_uint32(f, 0)) /* unused second word */
 733                 return false;
 734
 735         return true;
 736 }
 737
 738 FLAC__bool fixup_iff_headers(DecoderSession *d)
 739 {
 740         const char *fmt_desc = (d->is_wave_out? "WAVE" : "AIFF");
 741         FILE *f = fopen(d->outfilename, "r+b"); /* stream is positioned at beginning of file */
 742
 743         if(0 == f) {
 744                 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));
 745                 return false;
 746         }
 747
 748         if(!write_iff_headers(f, d, d->samples_processed)) {
 749                 fclose(f);
 750                 return false;
 751         }
 752
 753         fclose(f);
 754         return true;
 755 }
 756
 757 FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 758 {
 759         DecoderSession *decoder_session = (DecoderSession*)client_data;
 760         FILE *fout = decoder_session->fout;
 761         const unsigned bps = frame->header.bits_per_sample, channels = frame->header.channels;
 762         const unsigned shift = ((decoder_session->is_wave_out || decoder_session->is_aiff_out) && (bps%8)? 8-(bps%8): 0);
 763         FLAC__bool is_big_endian = (decoder_session->is_aiff_out? true : (decoder_session->is_wave_out? false : decoder_session->is_big_endian));
 764         FLAC__bool is_unsigned_samples = (decoder_session->is_aiff_out? false : (decoder_session->is_wave_out? bps<=8 : decoder_session->is_unsigned_samples));
 765         unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
 766         unsigned frame_bytes = 0;
 767         static FLAC__int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * sizeof(FLAC__int32)]; /* WATCHOUT: can be up to 2 megs */
 768         FLAC__uint8  *u8buffer  = (FLAC__uint8  *)s8buffer;
 769         FLAC__int16  *s16buffer = (FLAC__int16  *)s8buffer;
 770         FLAC__uint16 *u16buffer = (FLAC__uint16 *)s8buffer;
 771         FLAC__int32  *s32buffer = (FLAC__int32  *)s8buffer;
 772         FLAC__uint32 *u32buffer = (FLAC__uint32 *)s8buffer;
 773         size_t bytes_to_write = 0;
 774
 775         (void)decoder;
 776
 777         if(decoder_session->abort_flag)
 778                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 779
 780         /* sanity-check the bits-per-sample */
 781         if(decoder_session->bps) {
 782                 if(bps != decoder_session->bps) {
 783                         if(decoder_session->got_stream_info)
 784                                 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);
 785                         else
 786                                 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);
 787                         if(!decoder_session->continue_through_decode_errors)
 788                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 789                 }
 790         }
 791         else {
 792                 /* must not have gotten STREAMINFO, save the bps from the frame header */
 793                 FLAC__ASSERT(!decoder_session->got_stream_info);
 794                 decoder_session->bps = bps;
 795         }
 796
 797         /* sanity-check the #channels */
 798         if(decoder_session->channels) {
 799                 if(channels != decoder_session->channels) {
 800                         if(decoder_session->got_stream_info)
 801                                 flac__utils_printf(stderr, 1, "%s: ERROR, channels is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, channels, decoder_session->channels);
 802                         else
 803                                 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);
 804                         if(!decoder_session->continue_through_decode_errors)
 805                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 806                 }
 807         }
 808         else {
 809                 /* must not have gotten STREAMINFO, save the #channels from the frame header */
 810                 FLAC__ASSERT(!decoder_session->got_stream_info);
 811                 decoder_session->channels = channels;
 812         }
 813
 814         /* sanity-check the sample rate */
 815         if(decoder_session->sample_rate) {
 816                 if(frame->header.sample_rate != decoder_session->sample_rate) {
 817                         if(decoder_session->got_stream_info)
 818                                 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);
 819                         else
 820                                 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);
 821                         if(!decoder_session->continue_through_decode_errors)
 822                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 823                 }
 824         }
 825         else {
 826                 /* must not have gotten STREAMINFO, save the sample rate from the frame header */
 827                 FLAC__ASSERT(!decoder_session->got_stream_info);
 828                 decoder_session->sample_rate = frame->header.sample_rate;
 829         }
 830
 831         /*
 832          * limit the number of samples to accept based on --until
 833          */
 834         FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
 835         /* if we never got the total_samples from the metadata, the skip and until specs would never have been canonicalized, so protect against that: */
 836         if(decoder_session->skip_specification->is_relative) {
 837                 if(decoder_session->skip_specification->value.samples == 0) /* special case for when no --skip was given */
 838                         decoder_session->skip_specification->is_relative = false; /* convert to our meaning of beginning-of-stream */
 839                 else {
 840                         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);
 841                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 842                 }
 843         }
 844         if(decoder_session->until_specification->is_relative) {
 845                 if(decoder_session->until_specification->value.samples == 0) /* special case for when no --until was given */
 846                         decoder_session->until_specification->is_relative = false; /* convert to our meaning of end-of-stream */
 847                 else {
 848                         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);
 849                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 850                 }
 851         }
 852         FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
 853         FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
 854         if(decoder_session->until_specification->value.samples > 0) {
 855                 const FLAC__uint64 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
 856                 const FLAC__uint64 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
 857                 const FLAC__uint64 input_samples_passed = skip + decoder_session->samples_processed;
 858                 FLAC__ASSERT(until >= input_samples_passed);
 859                 if(input_samples_passed + wide_samples > until)
 860                         wide_samples = (unsigned)(until - input_samples_passed);
 861                 if (wide_samples == 0) {
 862                         decoder_session->abort_flag = true;
 863                         decoder_session->aborting_due_to_until = true;
 864                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 865                 }
 866         }
 867
 868         if(decoder_session->analysis_mode) {
 869                 FLAC__uint64 dpos;
 870                 FLAC__stream_decoder_get_decode_position(decoder_session->decoder, &dpos);
 871                 frame_bytes = (unsigned)(dpos-decoder_session->decode_position);
 872                 decoder_session->decode_position = dpos;
 873         }
 874
 875         if(wide_samples > 0) {
 876                 decoder_session->samples_processed += wide_samples;
 877                 decoder_session->frame_counter++;
 878
 879                 if(!(decoder_session->frame_counter & 0x3f))
 880                         print_stats(decoder_session);
 881
 882                 if(decoder_session->analysis_mode) {
 883                         flac__analyze_frame(frame, decoder_session->frame_counter-1, frame_bytes, decoder_session->aopts, fout);
 884                 }
 885                 else if(!decoder_session->test_only) {
 886                         if(shift && !decoder_session->replaygain.apply) {
 887                                 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 888                                         for(channel = 0; channel < channels; channel++)
 889                                                 ((FLAC__int32**)buffer)[channel][wide_sample] <<= shift;/*@@@@@@un-const'ing the buffer is hacky but safe*/
 890                         }
 891                         if(decoder_session->replaygain.apply) {
 892                                 bytes_to_write = FLAC__replaygain_synthesis__apply_gain(
 893                                         u8buffer,
 894                                         !is_big_endian,
 895                                         is_unsigned_samples,
 896                                         buffer,
 897                                         wide_samples,
 898                                         channels,
 899                                         bps, /* source_bps */
 900                                         bps+shift, /* target_bps */
 901                                         decoder_session->replaygain.scale,
 902                                         decoder_session->replaygain.spec.limiter == RGSS_LIMIT__HARD, /* hard_limit */
 903                                         decoder_session->replaygain.spec.noise_shaping != NOISE_SHAPING_NONE, /* do_dithering */
 904                                         &decoder_session->replaygain.dither_context
 905                                 );
 906                         }
 907                         else if(bps+shift == 8) {
 908                                 if(is_unsigned_samples) {
 909                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 910                                                 for(channel = 0; channel < channels; channel++, sample++)
 911                                                         u8buffer[sample] = (FLAC__uint8)(buffer[channel][wide_sample] + 0x80);
 912                                 }
 913                                 else {
 914                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 915                                                 for(channel = 0; channel < channels; channel++, sample++)
 916                                                         s8buffer[sample] = (FLAC__int8)(buffer[channel][wide_sample]);
 917                                 }
 918                                 bytes_to_write = sample;
 919                         }
 920                         else if(bps+shift == 16) {
 921                                 if(is_unsigned_samples) {
 922                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 923                                                 for(channel = 0; channel < channels; channel++, sample++)
 924                                                         u16buffer[sample] = (FLAC__uint16)(buffer[channel][wide_sample] + 0x8000);
 925                                 }
 926                                 else {
 927                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 928                                                 for(channel = 0; channel < channels; channel++, sample++)
 929                                                         s16buffer[sample] = (FLAC__int16)(buffer[channel][wide_sample]);
 930                                 }
 931                                 if(is_big_endian != is_big_endian_host_) {
 932                                         unsigned char tmp;
 933                                         const unsigned bytes = sample * 2;
 934                                         for(byte = 0; byte < bytes; byte += 2) {
 935                                                 tmp = u8buffer[byte];
 936                                                 u8buffer[byte] = u8buffer[byte+1];
 937                                                 u8buffer[byte+1] = tmp;
 938                                         }
 939                                 }
 940                                 bytes_to_write = 2 * sample;
 941                         }
 942                         else if(bps+shift == 24) {
 943                                 if(is_unsigned_samples) {
 944                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 945                                                 for(channel = 0; channel < channels; channel++, sample++)
 946                                                         u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
 947                                 }
 948                                 else {
 949                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 950                                                 for(channel = 0; channel < channels; channel++, sample++)
 951                                                         s32buffer[sample] = buffer[channel][wide_sample];
 952                                 }
 953                                 if(is_big_endian != is_big_endian_host_) {
 954                                         unsigned char tmp;
 955                                         const unsigned bytes = sample * 4;
 956                                         for(byte = 0; byte < bytes; byte += 4) {
 957                                                 tmp = u8buffer[byte];
 958                                                 u8buffer[byte] = u8buffer[byte+3];
 959                                                 u8buffer[byte+3] = tmp;
 960                                                 tmp = u8buffer[byte+1];
 961                                                 u8buffer[byte+1] = u8buffer[byte+2];
 962                                                 u8buffer[byte+2] = tmp;
 963                                         }
 964                                 }
 965                                 if(is_big_endian) {
 966                                         unsigned lbyte;
 967                                         const unsigned bytes = sample * 4;
 968                                         for(lbyte = byte = 0; byte < bytes; ) {
 969                                                 byte++;
 970                                                 u8buffer[lbyte++] = u8buffer[byte++];
 971                                                 u8buffer[lbyte++] = u8buffer[byte++];
 972                                                 u8buffer[lbyte++] = u8buffer[byte++];
 973                                         }
 974                                 }
 975                                 else {
 976                                         unsigned lbyte;
 977                                         const unsigned bytes = sample * 4;
 978                                         for(lbyte = byte = 0; byte < bytes; ) {
 979                                                 u8buffer[lbyte++] = u8buffer[byte++];
 980                                                 u8buffer[lbyte++] = u8buffer[byte++];
 981                                                 u8buffer[lbyte++] = u8buffer[byte++];
 982                                                 byte++;
 983                                         }
 984                                 }
 985                                 bytes_to_write = 3 * sample;
 986                         }
 987                         else {
 988                                 FLAC__ASSERT(0);
 989                                 /* double protection */
 990                                 decoder_session->abort_flag = true;
 991                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 992                         }
 993                 }
 994         }
 995         if(bytes_to_write > 0) {
 996                 if(flac__utils_fwrite(u8buffer, 1, bytes_to_write, fout) != bytes_to_write) {
 997                         /* if a pipe closed when writing to stdout, we let it go without an error message */
 998                         if(errno == EPIPE && decoder_session->fout == stdout)
 999                                 decoder_session->aborting_due_to_until = true;
1000                         decoder_session->abort_flag = true;
1001                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1002                 }
1003         }
1004         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
1005 }
1006
1007 void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1008 {
1009         DecoderSession *decoder_session = (DecoderSession*)client_data;
1010
1011         if(decoder_session->analysis_mode)
1012                 FLAC__stream_decoder_get_decode_position(decoder, &decoder_session->decode_position);
1013
1014         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
1015                 FLAC__uint64 skip, until;
1016                 decoder_session->got_stream_info = true;
1017                 decoder_session->has_md5sum = memcmp(metadata->data.stream_info.md5sum, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16);
1018                 decoder_session->bps = metadata->data.stream_info.bits_per_sample;
1019                 decoder_session->channels = metadata->data.stream_info.channels;
1020                 decoder_session->sample_rate = metadata->data.stream_info.sample_rate;
1021
1022                 flac__utils_canonicalize_skip_until_specification(decoder_session->skip_specification, decoder_session->sample_rate);
1023                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1024                 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
1025
1026                 /* remember, metadata->data.stream_info.total_samples can be 0, meaning 'unknown' */
1027                 if(metadata->data.stream_info.total_samples > 0 && skip >= metadata->data.stream_info.total_samples) {
1028                         flac__utils_printf(stderr, 1, "%s: ERROR trying to --skip more samples than in stream\n", decoder_session->inbasefilename);
1029                         decoder_session->abort_flag = true;
1030                         return;
1031                 }
1032                 else if(metadata->data.stream_info.total_samples == 0 && skip > 0) {
1033                         flac__utils_printf(stderr, 1, "%s: ERROR, can't --skip when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1034                         decoder_session->abort_flag = true;
1035                         return;
1036                 }
1037                 FLAC__ASSERT(skip == 0 || 0 == decoder_session->cue_specification);
1038                 decoder_session->total_samples = metadata->data.stream_info.total_samples - skip;
1039
1040                 /* note that we use metadata->data.stream_info.total_samples instead of decoder_session->total_samples */
1041                 if(!canonicalize_until_specification(decoder_session->until_specification, decoder_session->inbasefilename, decoder_session->sample_rate, skip, metadata->data.stream_info.total_samples)) {
1042                         decoder_session->abort_flag = true;
1043                         return;
1044                 }
1045                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1046                 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1047
1048                 if(until > 0) {
1049                         FLAC__ASSERT(decoder_session->total_samples != 0);
1050                         FLAC__ASSERT(0 == decoder_session->cue_specification);
1051                         decoder_session->total_samples -= (metadata->data.stream_info.total_samples - until);
1052                 }
1053
1054                 if(decoder_session->bps < 4 || decoder_session->bps > 24) {
1055                         flac__utils_printf(stderr, 1, "%s: ERROR: bits per sample is %u, must be 4-24\n", decoder_session->inbasefilename, decoder_session->bps);
1056                         decoder_session->abort_flag = true;
1057                         return;
1058                 }
1059         }
1060         else if(metadata->type == FLAC__METADATA_TYPE_CUESHEET) {
1061                 /* remember, at this point, decoder_session->total_samples can be 0, meaning 'unknown' */
1062                 if(decoder_session->total_samples == 0) {
1063                         flac__utils_printf(stderr, 1, "%s: ERROR can't use --cue when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1064                         decoder_session->abort_flag = true;
1065                         return;
1066                 }
1067
1068                 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);
1069
1070                 FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1071                 FLAC__ASSERT(decoder_session->skip_specification->value_is_samples);
1072
1073                 FLAC__ASSERT(!decoder_session->until_specification->is_relative);
1074                 FLAC__ASSERT(decoder_session->until_specification->value_is_samples);
1075
1076                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1077                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1078                 FLAC__ASSERT((FLAC__uint64)decoder_session->until_specification->value.samples <= decoder_session->total_samples);
1079                 FLAC__ASSERT(decoder_session->skip_specification->value.samples <= decoder_session->until_specification->value.samples);
1080
1081                 decoder_session->total_samples = decoder_session->until_specification->value.samples - decoder_session->skip_specification->value.samples;
1082         }
1083         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
1084                 if (decoder_session->replaygain.spec.apply) {
1085                         double reference, gain, peak;
1086                         if (!(decoder_session->replaygain.apply = grabbag__replaygain_load_from_vorbiscomment(metadata, decoder_session->replaygain.spec.use_album_gain, /*strict=*/false, &reference, &gain, &peak))) {
1087                                 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");
1088                                 if(decoder_session->treat_warnings_as_errors) {
1089                                         decoder_session->abort_flag = true;
1090                                         return;
1091                                 }
1092                         }
1093                         else {
1094                                 const char *ls[] = { "no", "peak", "hard" };
1095                                 const char *ns[] = { "no", "low", "medium", "high" };
1096                                 decoder_session->replaygain.scale = grabbag__replaygain_compute_scale_factor(peak, gain, decoder_session->replaygain.spec.preamp, decoder_session->replaygain.spec.limiter == RGSS_LIMIT__PEAK);
1097                                 FLAC__ASSERT(decoder_session->bps > 0 && decoder_session->bps <= 32);
1098                                 FLAC__replaygain_synthesis__init_dither_context(&decoder_session->replaygain.dither_context, decoder_session->bps, decoder_session->replaygain.spec.noise_shaping);
1099                                 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]);
1100                                 flac__utils_printf(stderr, 1, "%s: WARNING: applying ReplayGain is not lossless\n", decoder_session->inbasefilename);
1101                                 /* don't check if(decoder_session->treat_warnings_as_errors) because the user explicitly asked for it */
1102                         }
1103                 }
1104                 (void)flac__utils_get_channel_mask_tag(metadata, &decoder_session->channel_mask);
1105         }
1106 }
1107
1108 void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1109 {
1110         DecoderSession *decoder_session = (DecoderSession*)client_data;
1111         (void)decoder;
1112         flac__utils_printf(stderr, 1, "%s: *** Got error code %d:%s\n", decoder_session->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1113         if(!decoder_session->continue_through_decode_errors) {
1114                 decoder_session->abort_flag = true;
1115                 if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
1116                         decoder_session->aborting_due_to_unparseable = true;
1117         }
1118 }
1119
1120 void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status)
1121 {
1122         const int ilen = strlen(d->inbasefilename) + 1;
1123
1124         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1125
1126         flac__utils_printf(stderr, 1, "%*s init status = %s\n", ilen, "", FLAC__StreamDecoderInitStatusString[init_status]);
1127
1128         /* print out some more info for some errors: */
1129         if (init_status == FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE) {
1130                 flac__utils_printf(stderr, 1,
1131                         "\n"
1132                         "An error occurred opening the input file; it is likely that it does not exist\n"
1133                         "or is not readable.\n"
1134                 );
1135         }
1136 }
1137
1138 void print_error_with_state(const DecoderSession *d, const char *message)
1139 {
1140         const int ilen = strlen(d->inbasefilename) + 1;
1141
1142         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1143         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", FLAC__stream_decoder_get_resolved_state_string(d->decoder));
1144
1145         /* print out some more info for some errors: */
1146         if (d->aborting_due_to_unparseable) {
1147                 flac__utils_printf(stderr, 1,
1148                         "\n"
1149                         "The FLAC stream may have been created by a more advanced encoder.  Try\n"
1150                         "  metaflac --show-vendor-tag %s\n"
1151                         "If the version number is greater than %s, this decoder is probably\n"
1152                         "not able to decode the file.  If the version number is not, the file\n"
1153                         "may be corrupted, or you may have found a bug.  In this case please\n"
1154                         "submit a bug report to\n"
1155                         "    http://sourceforge.net/bugs/?func=addbug&group_id=13478\n"
1156                         "Make sure to use the \"Monitor\" feature to monitor the bug status.\n",
1157                         d->inbasefilename, FLAC__VERSION_STRING
1158                 );
1159         }
1160 }
1161
1162 void print_stats(const DecoderSession *decoder_session)
1163 {
1164         if(flac__utils_verbosity_ >= 2) {
1165 #if defined _MSC_VER || defined __MINGW32__
1166                 /* with MSVC you have to spoon feed it the casting */
1167                 const double progress = (double)(FLAC__int64)decoder_session->samples_processed / (double)(FLAC__int64)decoder_session->total_samples * 100.0;
1168 #else
1169                 const double progress = (double)decoder_session->samples_processed / (double)decoder_session->total_samples * 100.0;
1170 #endif
1171                 if(decoder_session->total_samples > 0) {
1172                         fprintf(stderr, "\r%s: %s%u%% complete",
1173                                 decoder_session->inbasefilename,
1174                                 decoder_session->test_only? "testing, " : decoder_session->analysis_mode? "analyzing, " : "",
1175                                 (unsigned)floor(progress + 0.5)
1176                         );
1177                 }
1178                 else {
1179                         fprintf(stderr, "\r%s: %s %u samples",
1180                                 decoder_session->inbasefilename,
1181                                 decoder_session->test_only? "tested" : decoder_session->analysis_mode? "analyzed" : "wrote",
1182                                 (unsigned)decoder_session->samples_processed
1183                         );
1184                 }
1185         }
1186 }