src/flac/decode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007,2008,2009  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 #ifndef fseeko
  33 #define fseeko fseek
  34 #endif
  35 #ifndef ftello
  36 #define ftello ftell
  37 #endif
  38 #endif
  39 #endif
  40 #include <errno.h>
  41 #include <math.h> /* for floor() */
  42 #include <stdio.h> /* for FILE etc. */
  43 #include <string.h> /* for strcmp(), strerror() */
  44 #include "FLAC/all.h"
  45 #include "share/grabbag.h"
  46 #include "share/replaygain_synthesis.h"
  47 #include "decode.h"
  48
  49 typedef struct {
  50 #if FLAC__HAS_OGG
  51         FLAC__bool is_ogg;
  52         FLAC__bool use_first_serial_number;
  53         long serial_number;
  54 #endif
  55
  56         FileFormat format;
  57         FLAC__bool treat_warnings_as_errors;
  58         FLAC__bool continue_through_decode_errors;
  59         FLAC__bool channel_map_none;
  60
  61         struct {
  62                 replaygain_synthesis_spec_t spec;
  63                 FLAC__bool apply; /* 'spec.apply' is just a request; this 'apply' means we actually parsed the RG tags and are ready to go */
  64                 double scale;
  65                 DitherContext dither_context;
  66         } replaygain;
  67
  68         FLAC__bool test_only;
  69         FLAC__bool analysis_mode;
  70         analysis_options aopts;
  71         utils__SkipUntilSpecification *skip_specification;
  72         utils__SkipUntilSpecification *until_specification; /* a canonicalized value of 0 mean end-of-stream (i.e. --until=-0) */
  73         utils__CueSpecification *cue_specification;
  74
  75         const char *inbasefilename;
  76         const char *infilename;
  77         const char *outfilename;
  78
  79         FLAC__uint64 samples_processed;
  80         unsigned frame_counter;
  81         FLAC__bool abort_flag;
  82         FLAC__bool aborting_due_to_until; /* true if we intentionally abort decoding prematurely because we hit the --until point */
  83         FLAC__bool aborting_due_to_unparseable; /* true if we abort decoding because we hit an unparseable frame */
  84         FLAC__bool error_callback_suppress_messages; /* turn on to prevent repeating messages from the error callback */
  85
  86         FLAC__bool iff_headers_need_fixup;
  87
  88         FLAC__bool is_big_endian;
  89         FLAC__bool is_unsigned_samples;
  90         FLAC__bool got_stream_info;
  91         FLAC__bool has_md5sum;
  92         FLAC__uint64 total_samples;
  93         unsigned bps;
  94         unsigned channels;
  95         unsigned sample_rate;
  96         FLAC__uint32 channel_mask;
  97
  98         /* these are used only in analyze mode */
  99         FLAC__uint64 decode_position;
 100
 101         FLAC__StreamDecoder *decoder;
 102
 103         FILE *fout;
 104
 105         foreign_metadata_t *foreign_metadata; /* NULL unless --keep-foreign-metadata requested */
 106         off_t fm_offset1, fm_offset2, fm_offset3;
 107 } DecoderSession;
 108
 109
 110 static FLAC__bool is_big_endian_host_;
 111
 112
 113 /*
 114  * local routines
 115  */
 116 static FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool use_first_serial_number, long serial_number, FileFormat format, 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, foreign_metadata_t *foreign_metadata, const char *infilename, const char *outfilename);
 117 static void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred);
 118 static FLAC__bool DecoderSession_init_decoder(DecoderSession *d, const char *infilename);
 119 static FLAC__bool DecoderSession_process(DecoderSession *d);
 120 static int DecoderSession_finish_ok(DecoderSession *d);
 121 static int DecoderSession_finish_error(DecoderSession *d);
 122 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input);
 123 static FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples);
 124 static FLAC__bool write_riff_wave_fmt_chunk_body(FILE *f, FLAC__bool is_waveformatextensible, unsigned bps, unsigned channels, unsigned sample_rate, FLAC__uint32 channel_mask);
 125 static FLAC__bool write_aiff_form_comm_chunk(FILE *f, FLAC__uint64 samples, unsigned bps, unsigned channels, unsigned sample_rate);
 126 static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val);
 127 static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val);
 128 static FLAC__bool write_little_endian_uint64(FILE *f, FLAC__uint64 val);
 129 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 130 static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val);
 131 static FLAC__bool write_sane_extended(FILE *f, unsigned val);
 132 static FLAC__bool fixup_iff_headers(DecoderSession *d);
 133 static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 134 static void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 135 static void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 136 static void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status);
 137 static void print_error_with_state(const DecoderSession *d, const char *message);
 138 static void print_stats(const DecoderSession *decoder_session);
 139
 140
 141 /*
 142  * public routines
 143  */
 144 int flac__decode_file(const char *infilename, const char *outfilename, FLAC__bool analysis_mode, analysis_options aopts, decode_options_t options)
 145 {
 146         DecoderSession decoder_session;
 147
 148         FLAC__ASSERT(
 149                 options.format == FORMAT_WAVE ||
 150                 options.format == FORMAT_WAVE64 ||
 151                 options.format == FORMAT_RF64 ||
 152                 options.format == FORMAT_AIFF ||
 153                 options.format == FORMAT_AIFF_C ||
 154                 options.format == FORMAT_RAW
 155         );
 156
 157         if(options.format == FORMAT_RAW) {
 158                 decoder_session.is_big_endian = options.format_options.raw.is_big_endian;
 159                 decoder_session.is_unsigned_samples = options.format_options.raw.is_unsigned_samples;
 160         }
 161
 162         if(!
 163                 DecoderSession_construct(
 164                         &decoder_session,
 165 #if FLAC__HAS_OGG
 166                         options.is_ogg,
 167                         options.use_first_serial_number,
 168                         options.serial_number,
 169 #else
 170                         /*is_ogg=*/false,
 171                         /*use_first_serial_number=*/false,
 172                         /*serial_number=*/0,
 173 #endif
 174                         options.format,
 175                         options.treat_warnings_as_errors,
 176                         options.continue_through_decode_errors,
 177                         options.channel_map_none,
 178                         options.replaygain_synthesis_spec,
 179                         analysis_mode,
 180                         aopts,
 181                         &options.skip_specification,
 182                         &options.until_specification,
 183                         options.has_cue_specification? &options.cue_specification : 0,
 184                         options.format == FORMAT_RAW? NULL : options.format_options.iff.foreign_metadata,
 185                         infilename,
 186                         outfilename
 187                 )
 188         )
 189                 return 1;
 190
 191         if(!DecoderSession_init_decoder(&decoder_session, 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 FLAC__bool DecoderSession_construct(DecoderSession *d, FLAC__bool is_ogg, FLAC__bool use_first_serial_number, long serial_number, FileFormat format, 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, foreign_metadata_t *foreign_metadata, const char *infilename, const char *outfilename)
 201 {
 202 #if FLAC__HAS_OGG
 203         d->is_ogg = is_ogg;
 204         d->use_first_serial_number = use_first_serial_number;
 205         d->serial_number = serial_number;
 206 #else
 207         (void)is_ogg;
 208         (void)use_first_serial_number;
 209         (void)serial_number;
 210 #endif
 211
 212         d->format = format;
 213         d->treat_warnings_as_errors = treat_warnings_as_errors;
 214         d->continue_through_decode_errors = continue_through_decode_errors;
 215         d->channel_map_none = channel_map_none;
 216         d->replaygain.spec = replaygain_synthesis_spec;
 217         d->replaygain.apply = false;
 218         d->replaygain.scale = 0.0;
 219         /* d->replaygain.dither_context gets initialized later once we know the sample resolution */
 220         d->test_only = (0 == outfilename);
 221         d->analysis_mode = analysis_mode;
 222         d->aopts = aopts;
 223         d->skip_specification = skip_specification;
 224         d->until_specification = until_specification;
 225         d->cue_specification = cue_specification;
 226
 227         d->inbasefilename = grabbag__file_get_basename(infilename);
 228         d->infilename = infilename;
 229         d->outfilename = outfilename;
 230
 231         d->samples_processed = 0;
 232         d->frame_counter = 0;
 233         d->abort_flag = false;
 234         d->aborting_due_to_until = false;
 235         d->aborting_due_to_unparseable = false;
 236         d->error_callback_suppress_messages = false;
 237
 238         d->iff_headers_need_fixup = false;
 239
 240         d->total_samples = 0;
 241         d->got_stream_info = false;
 242         d->has_md5sum = false;
 243         d->bps = 0;
 244         d->channels = 0;
 245         d->sample_rate = 0;
 246         d->channel_mask = 0;
 247
 248         d->decode_position = 0;
 249
 250         d->decoder = 0;
 251
 252         d->fout = 0; /* initialized with an open file later if necessary */
 253
 254         d->foreign_metadata = foreign_metadata;
 255
 256         FLAC__ASSERT(!(d->test_only && d->analysis_mode));
 257
 258         if(!d->test_only) {
 259                 if(0 == strcmp(outfilename, "-")) {
 260                         d->fout = grabbag__file_get_binary_stdout();
 261                 }
 262                 else {
 263                         if(0 == (d->fout = fopen(outfilename, "wb"))) {
 264                                 flac__utils_printf(stderr, 1, "%s: ERROR: can't open output file %s: %s\n", d->inbasefilename, outfilename, strerror(errno));
 265                                 DecoderSession_destroy(d, /*error_occurred=*/true);
 266                                 return false;
 267                         }
 268                 }
 269         }
 270
 271         if(analysis_mode)
 272                 flac__analyze_init(aopts);
 273
 274         return true;
 275 }
 276
 277 void DecoderSession_destroy(DecoderSession *d, FLAC__bool error_occurred)
 278 {
 279         if(0 != d->fout && d->fout != stdout) {
 280                 fclose(d->fout);
 281                 if(error_occurred)
 282                         unlink(d->outfilename);
 283         }
 284 }
 285
 286 FLAC__bool DecoderSession_init_decoder(DecoderSession *decoder_session, const char *infilename)
 287 {
 288         FLAC__StreamDecoderInitStatus init_status;
 289         FLAC__uint32 test = 1;
 290
 291         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
 292
 293         if(!decoder_session->analysis_mode && !decoder_session->test_only && decoder_session->foreign_metadata) {
 294                 const char *error;
 295                 if(!flac__foreign_metadata_read_from_flac(decoder_session->foreign_metadata, infilename, &error)) {
 296                         flac__utils_printf(stderr, 1, "%s: ERROR reading foreign metadata: %s\n", decoder_session->inbasefilename, error);
 297                         return false;
 298                 }
 299         }
 300
 301         decoder_session->decoder = FLAC__stream_decoder_new();
 302
 303         if(0 == decoder_session->decoder) {
 304                 flac__utils_printf(stderr, 1, "%s: ERROR creating the decoder instance\n", decoder_session->inbasefilename);
 305                 return false;
 306         }
 307
 308         FLAC__stream_decoder_set_md5_checking(decoder_session->decoder, true);
 309         if (0 != decoder_session->cue_specification)
 310                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_CUESHEET);
 311         if (decoder_session->replaygain.spec.apply)
 312                 FLAC__stream_decoder_set_metadata_respond(decoder_session->decoder, FLAC__METADATA_TYPE_VORBIS_COMMENT);
 313
 314 #if FLAC__HAS_OGG
 315         if(decoder_session->is_ogg) {
 316                 if(!decoder_session->use_first_serial_number)
 317                         FLAC__stream_decoder_set_ogg_serial_number(decoder_session->decoder, decoder_session->serial_number);
 318                 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);
 319         }
 320         else
 321 #endif
 322         {
 323                 init_status = FLAC__stream_decoder_init_file(decoder_session->decoder, strcmp(infilename, "-")? infilename : 0, write_callback, metadata_callback, error_callback, /*client_data=*/decoder_session);
 324         }
 325
 326         if(init_status != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
 327                 print_error_with_init_status(decoder_session, "ERROR initializing decoder", init_status);
 328                 return false;
 329         }
 330
 331         return true;
 332 }
 333
 334 FLAC__bool DecoderSession_process(DecoderSession *d)
 335 {
 336         if(!FLAC__stream_decoder_process_until_end_of_metadata(d->decoder)) {
 337                 flac__utils_printf(stderr, 2, "\n");
 338                 print_error_with_state(d, "ERROR while decoding metadata");
 339                 return false;
 340         }
 341         if(FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM) {
 342                 flac__utils_printf(stderr, 2, "\n");
 343                 print_error_with_state(d, "ERROR during metadata decoding");
 344                 if(!d->continue_through_decode_errors)
 345                         return false;
 346         }
 347
 348         if(d->abort_flag)
 349                 return false;
 350
 351         /* set channel mapping */
 352         if(!d->channel_map_none) {
 353                 /* currently FLAC order matches SMPTE/WAVEFORMATEXTENSIBLE order, so no reordering is necessary; see encode.c */
 354                 /* only the channel mask must be set if it was not already picked up from the WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag */
 355                 if(d->channels == 1) {
 356                         if(d->channel_mask == 0)
 357                                 d->channel_mask = 0x0001;
 358                 }
 359                 else if(d->channels == 2) {
 360                         if(d->channel_mask == 0)
 361                                 d->channel_mask = 0x0003;
 362                 }
 363                 else if(d->channels == 3) {
 364                         if(d->channel_mask == 0)
 365                                 d->channel_mask = 0x0007;
 366                 }
 367                 else if(d->channels == 4) {
 368                         if(d->channel_mask == 0)
 369                                 d->channel_mask = 0x0033;
 370                 }
 371                 else if(d->channels == 5) {
 372                         if(d->channel_mask == 0)
 373                                 d->channel_mask = 0x0607;
 374                 }
 375                 else if(d->channels == 6) {
 376                         if(d->channel_mask == 0)
 377                                 d->channel_mask = 0x060f;
 378                 }
 379         }
 380
 381         /* write the WAVE/AIFF headers if necessary */
 382         if(!d->analysis_mode && !d->test_only && d->format != FORMAT_RAW) {
 383                 if(!write_iff_headers(d->fout, d, d->total_samples)) {
 384                         d->abort_flag = true;
 385                         return false;
 386                 }
 387         }
 388
 389         if(d->skip_specification->value.samples > 0) {
 390                 const FLAC__uint64 skip = (FLAC__uint64)d->skip_specification->value.samples;
 391
 392                 if(!FLAC__stream_decoder_seek_absolute(d->decoder, skip)) {
 393                         print_error_with_state(d, "ERROR seeking while skipping bytes");
 394                         return false;
 395                 }
 396         }
 397         if(!FLAC__stream_decoder_process_until_end_of_stream(d->decoder) && !d->aborting_due_to_until) {
 398                 flac__utils_printf(stderr, 2, "\n");
 399                 print_error_with_state(d, "ERROR while decoding data");
 400                 if(!d->continue_through_decode_errors)
 401                         return false;
 402         }
 403         if(
 404                 (d->abort_flag && !(d->aborting_due_to_until || d->continue_through_decode_errors)) ||
 405                 (FLAC__stream_decoder_get_state(d->decoder) > FLAC__STREAM_DECODER_END_OF_STREAM && !d->aborting_due_to_until)
 406         ) {
 407                 flac__utils_printf(stderr, 2, "\n");
 408                 print_error_with_state(d, "ERROR during decoding");
 409                 return false;
 410         }
 411
 412         /* write padding bytes for alignment if necessary */
 413         if(!d->analysis_mode && !d->test_only && d->format != FORMAT_RAW) {
 414                 const FLAC__uint64 data_size = d->total_samples * d->channels * ((d->bps+7)/8);
 415                 unsigned padding;
 416                 if(d->format != FORMAT_WAVE64) {
 417                         padding = (unsigned)(data_size & 1);
 418                 }
 419                 else {
 420                         /* 8-byte alignment for Wave64 */
 421                         padding = (8 - (unsigned)(data_size & 7)) & 7;
 422                 }
 423                 for( ; padding > 0; --padding) {
 424                         if(flac__utils_fwrite("\000", 1, 1, d->fout) != 1) {
 425                                 print_error_with_state(
 426                                         d,
 427                                         d->format == FORMAT_WAVE?   "ERROR writing pad byte to WAVE data chunk" :
 428                                         d->format == FORMAT_WAVE64? "ERROR writing pad bytes to WAVE64 data chunk" :
 429                                         d->format == FORMAT_RF64?   "ERROR writing pad byte to RF64 data chunk" :
 430                                         "ERROR writing pad byte to AIFF SSND chunk"
 431                                 );
 432                                 return false;
 433                         }
 434                 }
 435         }
 436
 437         return true;
 438 }
 439
 440 int DecoderSession_finish_ok(DecoderSession *d)
 441 {
 442         FLAC__bool ok = true, md5_failure = false;
 443
 444         if(d->decoder) {
 445                 md5_failure = !FLAC__stream_decoder_finish(d->decoder) && !d->aborting_due_to_until;
 446                 print_stats(d);
 447                 FLAC__stream_decoder_delete(d->decoder);
 448         }
 449         if(d->analysis_mode)
 450                 flac__analyze_finish(d->aopts);
 451         if(md5_failure) {
 452                 flac__utils_printf(stderr, 1, "\r%s: ERROR, MD5 signature mismatch\n", d->inbasefilename);
 453                 ok = d->continue_through_decode_errors;
 454         }
 455         else {
 456                 if(!d->got_stream_info) {
 457                         flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since there was no STREAMINFO\n", d->inbasefilename);
 458                         ok = !d->treat_warnings_as_errors;
 459                 }
 460                 else if(!d->has_md5sum) {
 461                         flac__utils_printf(stderr, 1, "\r%s: WARNING, cannot check MD5 signature since it was unset in the STREAMINFO\n", d->inbasefilename);
 462                         ok = !d->treat_warnings_as_errors;
 463                 }
 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->analysis_mode && !d->test_only && d->format != FORMAT_RAW) {
 468                 if(d->iff_headers_need_fixup || (!d->got_stream_info && strcmp(d->outfilename, "-"))) {
 469                         if(!fixup_iff_headers(d))
 470                                 return 1;
 471                 }
 472                 if(d->foreign_metadata) {
 473                         const char *error;
 474                         if(!flac__foreign_metadata_write_to_iff(d->foreign_metadata, d->infilename, d->outfilename, d->fm_offset1, d->fm_offset2, d->fm_offset3, &error)) {
 475                                 flac__utils_printf(stderr, 1, "ERROR updating foreign metadata from %s to %s: %s\n", d->infilename, d->outfilename, error);
 476                                 return 1;
 477                         }
 478                 }
 479         }
 480         return ok? 0 : 1;
 481 }
 482
 483 int DecoderSession_finish_error(DecoderSession *d)
 484 {
 485         if(d->decoder) {
 486                 (void)FLAC__stream_decoder_finish(d->decoder);
 487                 FLAC__stream_decoder_delete(d->decoder);
 488         }
 489         if(d->analysis_mode)
 490                 flac__analyze_finish(d->aopts);
 491         DecoderSession_destroy(d, /*error_occurred=*/true);
 492         return 1;
 493 }
 494
 495 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
 496 {
 497         /* convert from mm:ss.sss to sample number if necessary */
 498         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
 499
 500         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
 501         if(spec->is_relative && spec->value.samples == 0) {
 502                 spec->is_relative = false;
 503                 return true;
 504         }
 505
 506         /* in any other case the total samples in the input must be known */
 507         if(total_samples_in_input == 0) {
 508                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when FLAC metadata has total sample count of 0\n", inbasefilename);
 509                 return false;
 510         }
 511
 512         FLAC__ASSERT(spec->value_is_samples);
 513
 514         /* convert relative specifications to absolute */
 515         if(spec->is_relative) {
 516                 if(spec->value.samples <= 0)
 517                         spec->value.samples += (FLAC__int64)total_samples_in_input;
 518                 else
 519                         spec->value.samples += skip;
 520                 spec->is_relative = false;
 521         }
 522
 523         /* error check */
 524         if(spec->value.samples < 0) {
 525                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
 526                 return false;
 527         }
 528         if((FLAC__uint64)spec->value.samples <= skip) {
 529                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
 530                 return false;
 531         }
 532         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
 533                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
 534                 return false;
 535         }
 536
 537         return true;
 538 }
 539
 540 FLAC__bool write_iff_headers(FILE *f, DecoderSession *decoder_session, FLAC__uint64 samples)
 541 {
 542         const FileFormat format = decoder_session->format;
 543         const char *fmt_desc =
 544                 format==FORMAT_WAVE? "WAVE" :
 545                 format==FORMAT_WAVE64? "Wave64" :
 546                 format==FORMAT_RF64? "RF64" :
 547                 "AIFF";
 548         const FLAC__bool is_waveformatextensible =
 549                 (format == FORMAT_WAVE || format == FORMAT_WAVE64 || format == FORMAT_RF64) &&
 550                 (
 551                         decoder_session->channel_mask == 2 ||
 552                         decoder_session->channel_mask > 3 ||
 553                         decoder_session->bps%8 ||
 554                         decoder_session->channels > 2
 555                 );
 556         const FLAC__uint64 data_size = samples * decoder_session->channels * ((decoder_session->bps+7)/8);
 557         const FLAC__uint64 aligned_data_size =
 558                 format == FORMAT_WAVE64?
 559                         (data_size+7) & (~(FLAC__uint64)7) :
 560                         (data_size+1) & (~(FLAC__uint64)1);
 561
 562         FLAC__uint64 iff_size;
 563         unsigned foreign_metadata_size = 0; /* size of all non-audio non-fmt/COMM foreign metadata chunks */
 564         foreign_metadata_t *fm = decoder_session->foreign_metadata;
 565         size_t i;
 566
 567         FLAC__ASSERT(
 568                 format == FORMAT_WAVE ||
 569                 format == FORMAT_WAVE64 ||
 570                 format == FORMAT_RF64 ||
 571                 format == FORMAT_AIFF ||
 572                 format == FORMAT_AIFF_C
 573         );
 574
 575         if(samples == 0) {
 576                 if(f == stdout) {
 577                         flac__utils_printf(stderr, 1, "%s: WARNING, don't have accurate sample count available for %s header.\n", decoder_session->inbasefilename, fmt_desc);
 578                         flac__utils_printf(stderr, 1, "             Generated %s file will have a data chunk size of 0.  Try\n", fmt_desc);
 579                         flac__utils_printf(stderr, 1, "             decoding directly to a file instead.\n");
 580                         if(decoder_session->treat_warnings_as_errors)
 581                                 return false;
 582                 }
 583                 else {
 584                         decoder_session->iff_headers_need_fixup = true;
 585                 }
 586         }
 587
 588         if(fm) {
 589                 FLAC__ASSERT(fm->format_block);
 590                 FLAC__ASSERT(fm->audio_block);
 591                 FLAC__ASSERT(fm->format_block < fm->audio_block);
 592                 /* calc foreign metadata size; we always skip the first chunk, ds64 chunk, format chunk, and sound chunk since we write our own */
 593                 for(i = format==FORMAT_RF64?2:1; i < fm->num_blocks; i++) {
 594                         if(i != fm->format_block && i != fm->audio_block)
 595                                 foreign_metadata_size += fm->blocks[i].size;
 596                 }
 597         }
 598
 599         if(samples == 0)
 600                 iff_size = 0;
 601         else if(format == FORMAT_WAVE || format == FORMAT_RF64)
 602                 /* 4 for WAVE form bytes */
 603                 /* +{36,0} for ds64 chunk */
 604                 /* +8+{40,16} for fmt chunk header and body */
 605                 /* +8 for data chunk header */
 606                 iff_size = 4 + (format==FORMAT_RF64?36:0) + 8+(is_waveformatextensible?40:16) + 8 + foreign_metadata_size + aligned_data_size;
 607         else if(format == FORMAT_WAVE64)
 608                 /* 16+8 for RIFF GUID and size field */
 609                 /* +16 for WAVE GUID */
 610                 /* +16+8+{40,16} for fmt chunk header (GUID and size field) and body */
 611                 /* +16+8 for data chunk header (GUID and size field) */
 612                 iff_size = 16+8 + 16 + 16+8+(is_waveformatextensible?40:16) + 16+8 + foreign_metadata_size + aligned_data_size;
 613         else /* AIFF */
 614                 iff_size = 46 + foreign_metadata_size + aligned_data_size;
 615
 616         if(format != FORMAT_WAVE64 && format != FORMAT_RF64 && iff_size >= 0xFFFFFFF4) {
 617                 flac__utils_printf(stderr, 1, "%s: ERROR: stream is too big to fit in a single %s file\n", decoder_session->inbasefilename, fmt_desc);
 618                 return false;
 619         }
 620
 621         if(format == FORMAT_WAVE || format == FORMAT_WAVE64 || format == FORMAT_RF64) {
 622                 /* RIFF header */
 623                 switch(format) {
 624                         case FORMAT_WAVE:
 625                                 if(flac__utils_fwrite("RIFF", 1, 4, f) != 4)
 626                                         return false;
 627                                 if(!write_little_endian_uint32(f, (FLAC__uint32)iff_size)) /* filesize-8 */
 628                                         return false;
 629                                 if(flac__utils_fwrite("WAVE", 1, 4, f) != 4)
 630                                         return false;
 631                                 break;
 632                         case FORMAT_WAVE64:
 633                                 /* RIFF GUID 66666972-912E-11CF-A5D6-28DB04C10000 */
 634                                 if(flac__utils_fwrite("\x72\x69\x66\x66\x2E\x91\xCF\x11\xD6\xA5\x28\xDB\x04\xC1\x00\x00", 1, 16, f) != 16)
 635                                         return false;
 636                                 if(!write_little_endian_uint64(f, iff_size))
 637                                         return false;
 638                                 /* WAVE GUID 65766177-ACF3-11D3-8CD1-00C04F8EDB8A */
 639                                 if(flac__utils_fwrite("\x77\x61\x76\x65\xF3\xAC\xD3\x11\xD1\x8C\x00\xC0\x4F\x8E\xDB\x8A", 1, 16, f) != 16)
 640                                         return false;
 641                                 break;
 642                         case FORMAT_RF64:
 643                                 if(flac__utils_fwrite("RF64", 1, 4, f) != 4)
 644                                         return false;
 645                                 if(!write_little_endian_uint32(f, 0xffffffff))
 646                                         return false;
 647                                 if(flac__utils_fwrite("WAVE", 1, 4, f) != 4)
 648                                         return false;
 649                                 break;
 650                         default:
 651                                 return false;
 652                 }
 653
 654                 /* ds64 chunk for RF64 */
 655                 if(format == FORMAT_RF64) {
 656                         if(flac__utils_fwrite("ds64", 1, 4, f) != 4)
 657                                 return false;
 658
 659                         if(!write_little_endian_uint32(f, 28)) /* chunk size */
 660                                 return false;
 661
 662                         if(!write_little_endian_uint64(f, iff_size))
 663                                 return false;
 664
 665                         if(!write_little_endian_uint64(f, data_size))
 666                                 return false;
 667
 668                         if(!write_little_endian_uint64(f, samples)) /*@@@@@@ correct? */
 669                                 return false;
 670
 671                         if(!write_little_endian_uint32(f, 0)) /* table size */
 672                                 return false;
 673                 }
 674
 675                 decoder_session->fm_offset1 = ftello(f);
 676
 677                 if(fm) {
 678                         /* seek forward to {allocate} or {skip over already-written chunks} before "fmt " */
 679                         for(i = format==FORMAT_RF64?2:1; i < fm->format_block; i++) {
 680                                 if(fseeko(f, fm->blocks[i].size, SEEK_CUR) < 0) {
 681                                         flac__utils_printf(stderr, 1, "%s: ERROR: allocating/skipping foreign metadata before \"fmt \"\n", decoder_session->inbasefilename);
 682                                         return false;
 683                                 }
 684                         }
 685                 }
 686
 687                 if(format != FORMAT_WAVE64) {
 688                         if(flac__utils_fwrite("fmt ", 1, 4, f) != 4)
 689                                 return false;
 690                         if(!write_little_endian_uint32(f, is_waveformatextensible? 40 : 16)) /* chunk size */
 691                                 return false;
 692                 }
 693                 else { /* Wave64 */
 694                         /* fmt GUID 20746D66-ACF3-11D3-8CD1-00C04F8EDB8A */
 695                         if(flac__utils_fwrite("\x66\x6D\x74\x20\xF3\xAC\xD3\x11\xD1\x8C\x00\xC0\x4F\x8E\xDB\x8A", 1, 16, f) != 16)
 696                                 return false;
 697                         /* chunk size (+16+8 for GUID and size fields) */
 698                         if(!write_little_endian_uint64(f, 16+8+(is_waveformatextensible?40:16)))
 699                                 return false;
 700                 }
 701
 702                 if(!write_riff_wave_fmt_chunk_body(f, is_waveformatextensible, decoder_session->bps, decoder_session->channels, decoder_session->sample_rate, decoder_session->channel_mask))
 703                         return false;
 704
 705                 decoder_session->fm_offset2 = ftello(f);
 706
 707                 if(fm) {
 708                         /* seek forward to {allocate} or {skip over already-written chunks} after "fmt " but before "data" */
 709                         for(i = fm->format_block+1; i < fm->audio_block; i++) {
 710                                 if(fseeko(f, fm->blocks[i].size, SEEK_CUR) < 0) {
 711                                         flac__utils_printf(stderr, 1, "%s: ERROR: allocating/skipping foreign metadata after \"fmt \"\n", decoder_session->inbasefilename);
 712                                         return false;
 713                                 }
 714                         }
 715                 }
 716
 717                 if(format != FORMAT_WAVE64) {
 718                         if(flac__utils_fwrite("data", 1, 4, f) != 4)
 719                                 return false;
 720                         if(!write_little_endian_uint32(f, format==FORMAT_RF64? 0xffffffff : (FLAC__uint32)data_size))
 721                                 return false;
 722                 }
 723                 else { /* Wave64 */
 724                         /* data GUID 61746164-ACF3-11D3-8CD1-00C04F8EDB8A */
 725                         if(flac__utils_fwrite("\x64\x61\x74\x61\xF3\xAC\xD3\x11\xD1\x8C\x00\xC0\x4F\x8E\xDB\x8A", 1, 16, f) != 16)
 726                                 return false;
 727                         /* +16+8 for GUID and size fields */
 728                         if(!write_little_endian_uint64(f, 16+8 + data_size))
 729                                 return false;
 730                 }
 731
 732                 decoder_session->fm_offset3 = ftello(f) + aligned_data_size;
 733         }
 734         else {
 735                 if(flac__utils_fwrite("FORM", 1, 4, f) != 4)
 736                         return false;
 737
 738                 if(!write_big_endian_uint32(f, (FLAC__uint32)iff_size)) /* filesize-8 */
 739                         return false;
 740
 741                 if(flac__utils_fwrite("AIFF", 1, 4, f) != 4)
 742                         return false;
 743
 744                 decoder_session->fm_offset1 = ftello(f);
 745
 746                 if(fm) {
 747                         /* seek forward to {allocate} or {skip over already-written chunks} before "COMM" */
 748                         for(i = 1; i < fm->format_block; i++) {
 749                                 if(fseeko(f, fm->blocks[i].size, SEEK_CUR) < 0) {
 750                                         flac__utils_printf(stderr, 1, "%s: ERROR: allocating/skipping foreign metadata before \"COMM\"\n", decoder_session->inbasefilename);
 751                                         return false;
 752                                 }
 753                         }
 754                 }
 755
 756                 if(!write_aiff_form_comm_chunk(f, samples, decoder_session->bps, decoder_session->channels, decoder_session->sample_rate))
 757                         return false;
 758
 759                 decoder_session->fm_offset2 = ftello(f);
 760
 761                 if(fm) {
 762                         /* seek forward to {allocate} or {skip over already-written chunks} after "COMM" but before "SSND" */
 763                         for(i = fm->format_block+1; i < fm->audio_block; i++) {
 764                                 if(fseeko(f, fm->blocks[i].size, SEEK_CUR) < 0) {
 765                                         flac__utils_printf(stderr, 1, "%s: ERROR: allocating/skipping foreign metadata after \"COMM\"\n", decoder_session->inbasefilename);
 766                                         return false;
 767                                 }
 768                         }
 769                 }
 770
 771                 if(flac__utils_fwrite("SSND", 1, 4, f) != 4)
 772                         return false;
 773
 774                 if(!write_big_endian_uint32(f, (FLAC__uint32)data_size + 8)) /* data size */
 775                         return false;
 776
 777                 if(!write_big_endian_uint32(f, 0/*offset_size*/))
 778                         return false;
 779
 780                 if(!write_big_endian_uint32(f, 0/*block_size*/))
 781                         return false;
 782
 783                 decoder_session->fm_offset3 = ftello(f) + aligned_data_size;
 784         }
 785
 786         return true;
 787 }
 788
 789 FLAC__bool write_riff_wave_fmt_chunk_body(FILE *f, FLAC__bool is_waveformatextensible, unsigned bps, unsigned channels, unsigned sample_rate, FLAC__uint32 channel_mask)
 790 {
 791         if(!write_little_endian_uint16(f, (FLAC__uint16)(is_waveformatextensible? 65534 : 1))) /* compression code */
 792                 return false;
 793
 794         if(!write_little_endian_uint16(f, (FLAC__uint16)channels))
 795                 return false;
 796
 797         if(!write_little_endian_uint32(f, sample_rate))
 798                 return false;
 799
 800         if(!write_little_endian_uint32(f, sample_rate * channels * ((bps+7) / 8)))
 801                 return false;
 802
 803         if(!write_little_endian_uint16(f, (FLAC__uint16)(channels * ((bps+7) / 8)))) /* block align */
 804                 return false;
 805
 806         if(!write_little_endian_uint16(f, (FLAC__uint16)(((bps+7)/8)*8))) /* bits per sample */
 807                 return false;
 808
 809         if(is_waveformatextensible) {
 810                 if(!write_little_endian_uint16(f, (FLAC__uint16)22)) /* cbSize */
 811                         return false;
 812
 813                 if(!write_little_endian_uint16(f, (FLAC__uint16)bps)) /* validBitsPerSample */
 814                         return false;
 815
 816                 if(!write_little_endian_uint32(f, channel_mask))
 817                         return false;
 818
 819                 /* GUID = {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}} */
 820                 if(flac__utils_fwrite("\x01\x00\x00\x00\x00\x00\x10\x00\x80\x00\x00\xaa\x00\x38\x9b\x71", 1, 16, f) != 16)
 821                         return false;
 822         }
 823
 824         return true;
 825 }
 826
 827 FLAC__bool write_aiff_form_comm_chunk(FILE *f, FLAC__uint64 samples, unsigned bps, unsigned channels, unsigned sample_rate)
 828 {
 829         FLAC__ASSERT(samples <= 0xffffffff);
 830
 831         if(flac__utils_fwrite("COMM", 1, 4, f) != 4)
 832                 return false;
 833
 834         if(!write_big_endian_uint32(f, 18)) /* chunk size = 18 */
 835                 return false;
 836
 837         if(!write_big_endian_uint16(f, (FLAC__uint16)channels))
 838                 return false;
 839
 840         if(!write_big_endian_uint32(f, (FLAC__uint32)samples))
 841                 return false;
 842
 843         if(!write_big_endian_uint16(f, (FLAC__uint16)bps))
 844                 return false;
 845
 846         if(!write_sane_extended(f, sample_rate))
 847                 return false;
 848
 849         return true;
 850 }
 851
 852 FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 val)
 853 {
 854         FLAC__byte *b = (FLAC__byte*)(&val);
 855         if(is_big_endian_host_) {
 856                 FLAC__byte tmp;
 857                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 858         }
 859         return flac__utils_fwrite(b, 1, 2, f) == 2;
 860 }
 861
 862 FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 val)
 863 {
 864         FLAC__byte *b = (FLAC__byte*)(&val);
 865         if(is_big_endian_host_) {
 866                 FLAC__byte tmp;
 867                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 868                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 869         }
 870         return flac__utils_fwrite(b, 1, 4, f) == 4;
 871 }
 872
 873 FLAC__bool write_little_endian_uint64(FILE *f, FLAC__uint64 val)
 874 {
 875         FLAC__byte *b = (FLAC__byte*)(&val);
 876         if(is_big_endian_host_) {
 877                 FLAC__byte tmp;
 878                 tmp = b[7]; b[7] = b[0]; b[0] = tmp;
 879                 tmp = b[6]; b[6] = b[1]; b[1] = tmp;
 880                 tmp = b[5]; b[5] = b[2]; b[2] = tmp;
 881                 tmp = b[4]; b[4] = b[3]; b[3] = tmp;
 882         }
 883         return flac__utils_fwrite(b, 1, 8, f) == 8;
 884 }
 885
 886 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
 887 {
 888         FLAC__byte *b = (FLAC__byte*)(&val);
 889         if(!is_big_endian_host_) {
 890                 FLAC__byte tmp;
 891                 tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 892         }
 893         return flac__utils_fwrite(b, 1, 2, f) == 2;
 894 }
 895
 896 FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 val)
 897 {
 898         FLAC__byte *b = (FLAC__byte*)(&val);
 899         if(!is_big_endian_host_) {
 900                 FLAC__byte tmp;
 901                 tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 902                 tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 903         }
 904         return flac__utils_fwrite(b, 1, 4, f) == 4;
 905 }
 906
 907 FLAC__bool write_sane_extended(FILE *f, unsigned val)
 908         /* Write to 'f' a SANE extended representation of 'val'.  Return false if
 909         * the write succeeds; return true otherwise.
 910         *
 911         * SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
 912         * of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
 913         * representations, it does not imply a 1 above the MSB of the significand.
 914         *
 915         * Preconditions:
 916         *  val!=0U
 917         */
 918 {
 919         unsigned int shift, exponent;
 920
 921         FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */
 922
 923         for(shift= 0U; (val>>(31-shift))==0U; ++shift)
 924                 ;
 925         val<<= shift;
 926         exponent= 63U-(shift+32U); /* add 32 for unused second word */
 927
 928         if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
 929                 return false;
 930         if(!write_big_endian_uint32(f, val))
 931                 return false;
 932         if(!write_big_endian_uint32(f, 0)) /* unused second word */
 933                 return false;
 934
 935         return true;
 936 }
 937
 938 FLAC__bool fixup_iff_headers(DecoderSession *d)
 939 {
 940         const char *fmt_desc =
 941                 d->format==FORMAT_WAVE? "WAVE" :
 942                 d->format==FORMAT_WAVE64? "Wave64" :
 943                 d->format==FORMAT_RF64? "RF64" :
 944                 "AIFF";
 945         FILE *f = fopen(d->outfilename, "r+b"); /* stream is positioned at beginning of file */
 946
 947         if(0 == f) {
 948                 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));
 949                 return false;
 950         }
 951
 952         if(!write_iff_headers(f, d, d->samples_processed)) {
 953                 fclose(f);
 954                 return false;
 955         }
 956
 957         fclose(f);
 958         return true;
 959 }
 960
 961 FLAC__StreamDecoderWriteStatus write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 962 {
 963         DecoderSession *decoder_session = (DecoderSession*)client_data;
 964         FILE *fout = decoder_session->fout;
 965         const unsigned bps = frame->header.bits_per_sample, channels = frame->header.channels;
 966         const unsigned shift = (decoder_session->format != FORMAT_RAW && (bps%8))? 8-(bps%8): 0;
 967         FLAC__bool is_big_endian = (
 968                 decoder_session->format == FORMAT_AIFF || decoder_session->format == FORMAT_AIFF_C ? true : (
 969                 decoder_session->format == FORMAT_WAVE || decoder_session->format == FORMAT_WAVE64 || decoder_session->format == FORMAT_RF64 ? false :
 970                 decoder_session->is_big_endian
 971         ));
 972         FLAC__bool is_unsigned_samples = (
 973                 decoder_session->format == FORMAT_AIFF || decoder_session->format == FORMAT_AIFF_C ? false : (
 974                 decoder_session->format == FORMAT_WAVE || decoder_session->format == FORMAT_WAVE64 || decoder_session->format == FORMAT_RF64 ? bps<=8 :
 975                 decoder_session->is_unsigned_samples
 976         ));
 977         unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
 978         unsigned frame_bytes = 0;
 979         static FLAC__int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * sizeof(FLAC__int32)]; /* WATCHOUT: can be up to 2 megs */
 980         FLAC__uint8  *u8buffer  = (FLAC__uint8  *)s8buffer;
 981         FLAC__int16  *s16buffer = (FLAC__int16  *)s8buffer;
 982         FLAC__uint16 *u16buffer = (FLAC__uint16 *)s8buffer;
 983         FLAC__int32  *s32buffer = (FLAC__int32  *)s8buffer;
 984         FLAC__uint32 *u32buffer = (FLAC__uint32 *)s8buffer;
 985         size_t bytes_to_write = 0;
 986
 987         (void)decoder;
 988
 989         if(decoder_session->abort_flag)
 990                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
 991
 992         /* sanity-check the bits-per-sample */
 993         if(decoder_session->bps) {
 994                 if(bps != decoder_session->bps) {
 995                         if(decoder_session->got_stream_info)
 996                                 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);
 997                         else
 998                                 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);
 999                         if(!decoder_session->continue_through_decode_errors)
1000                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1001                 }
1002         }
1003         else {
1004                 /* must not have gotten STREAMINFO, save the bps from the frame header */
1005                 FLAC__ASSERT(!decoder_session->got_stream_info);
1006                 decoder_session->bps = bps;
1007         }
1008
1009         /* sanity-check the #channels */
1010         if(decoder_session->channels) {
1011                 if(channels != decoder_session->channels) {
1012                         if(decoder_session->got_stream_info)
1013                                 flac__utils_printf(stderr, 1, "%s: ERROR, channels is %u in frame but %u in STREAMINFO\n", decoder_session->inbasefilename, channels, decoder_session->channels);
1014                         else
1015                                 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);
1016                         if(!decoder_session->continue_through_decode_errors)
1017                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1018                 }
1019         }
1020         else {
1021                 /* must not have gotten STREAMINFO, save the #channels from the frame header */
1022                 FLAC__ASSERT(!decoder_session->got_stream_info);
1023                 decoder_session->channels = channels;
1024         }
1025
1026         /* sanity-check the sample rate */
1027         if(decoder_session->sample_rate) {
1028                 if(frame->header.sample_rate != decoder_session->sample_rate) {
1029                         if(decoder_session->got_stream_info)
1030                                 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);
1031                         else
1032                                 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);
1033                         if(!decoder_session->continue_through_decode_errors)
1034                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1035                 }
1036         }
1037         else {
1038                 /* must not have gotten STREAMINFO, save the sample rate from the frame header */
1039                 FLAC__ASSERT(!decoder_session->got_stream_info);
1040                 decoder_session->sample_rate = frame->header.sample_rate;
1041         }
1042
1043         /*
1044          * limit the number of samples to accept based on --until
1045          */
1046         FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1047         /* if we never got the total_samples from the metadata, the skip and until specs would never have been canonicalized, so protect against that: */
1048         if(decoder_session->skip_specification->is_relative) {
1049                 if(decoder_session->skip_specification->value.samples == 0) /* special case for when no --skip was given */
1050                         decoder_session->skip_specification->is_relative = false; /* convert to our meaning of beginning-of-stream */
1051                 else {
1052                         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);
1053                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1054                 }
1055         }
1056         if(decoder_session->until_specification->is_relative) {
1057                 if(decoder_session->until_specification->value.samples == 0) /* special case for when no --until was given */
1058                         decoder_session->until_specification->is_relative = false; /* convert to our meaning of end-of-stream */
1059                 else {
1060                         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);
1061                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1062                 }
1063         }
1064         FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1065         FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1066         if(decoder_session->until_specification->value.samples > 0) {
1067                 const FLAC__uint64 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
1068                 const FLAC__uint64 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1069                 const FLAC__uint64 input_samples_passed = skip + decoder_session->samples_processed;
1070                 FLAC__ASSERT(until >= input_samples_passed);
1071                 if(input_samples_passed + wide_samples > until)
1072                         wide_samples = (unsigned)(until - input_samples_passed);
1073                 if (wide_samples == 0) {
1074                         decoder_session->abort_flag = true;
1075                         decoder_session->aborting_due_to_until = true;
1076                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1077                 }
1078         }
1079
1080         if(decoder_session->analysis_mode) {
1081                 FLAC__uint64 dpos;
1082                 FLAC__stream_decoder_get_decode_position(decoder_session->decoder, &dpos);
1083                 frame_bytes = (unsigned)(dpos-decoder_session->decode_position);
1084                 decoder_session->decode_position = dpos;
1085         }
1086
1087         if(wide_samples > 0) {
1088                 decoder_session->samples_processed += wide_samples;
1089                 decoder_session->frame_counter++;
1090
1091                 if(!(decoder_session->frame_counter & 0x3f))
1092                         print_stats(decoder_session);
1093
1094                 if(decoder_session->analysis_mode) {
1095                         flac__analyze_frame(frame, decoder_session->frame_counter-1, decoder_session->decode_position-frame_bytes, frame_bytes, decoder_session->aopts, fout);
1096                 }
1097                 else if(!decoder_session->test_only) {
1098                         if(shift && !decoder_session->replaygain.apply) {
1099                                 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1100                                         for(channel = 0; channel < channels; channel++)
1101                                                 ((FLAC__int32**)buffer)[channel][wide_sample] <<= shift;/*@@@@@@un-const'ing the buffer is hacky but safe*/
1102                         }
1103                         if(decoder_session->replaygain.apply) {
1104                                 bytes_to_write = FLAC__replaygain_synthesis__apply_gain(
1105                                         u8buffer,
1106                                         !is_big_endian,
1107                                         is_unsigned_samples,
1108                                         buffer,
1109                                         wide_samples,
1110                                         channels,
1111                                         bps, /* source_bps */
1112                                         bps+shift, /* target_bps */
1113                                         decoder_session->replaygain.scale,
1114                                         decoder_session->replaygain.spec.limiter == RGSS_LIMIT__HARD, /* hard_limit */
1115                                         decoder_session->replaygain.spec.noise_shaping != NOISE_SHAPING_NONE, /* do_dithering */
1116                                         &decoder_session->replaygain.dither_context
1117                                 );
1118                         }
1119                         /* first some special code for common cases */
1120                         else if(is_big_endian == is_big_endian_host_ && !is_unsigned_samples && channels == 2 && bps+shift == 16) {
1121                                 FLAC__int16 *buf1_ = s16buffer + 1;
1122                                 if(is_big_endian)
1123                                         memcpy(s16buffer, ((FLAC__byte*)(buffer[0]))+2, sizeof(FLAC__int32) * wide_samples - 2);
1124                                 else
1125                                         memcpy(s16buffer, buffer[0], sizeof(FLAC__int32) * wide_samples);
1126                                 for(sample = 0; sample < wide_samples; sample++, buf1_+=2)
1127                                         *buf1_ = (FLAC__int16)buffer[1][sample];
1128                                 bytes_to_write = 4 * sample;
1129                         }
1130                         else if(is_big_endian == is_big_endian_host_ && !is_unsigned_samples && channels == 1 && bps+shift == 16) {
1131                                 FLAC__int16 *buf1_ = s16buffer;
1132                                 for(sample = 0; sample < wide_samples; sample++)
1133                                         *buf1_++ = (FLAC__int16)buffer[0][sample];
1134                                 bytes_to_write = 2 * sample;
1135                         }
1136                         /* generic code for the rest */
1137                         else if(bps+shift == 16) {
1138                                 if(is_unsigned_samples) {
1139                                         if(channels == 2) {
1140                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++) {
1141                                                         u16buffer[sample++] = (FLAC__uint16)(buffer[0][wide_sample] + 0x8000);
1142                                                         u16buffer[sample++] = (FLAC__uint16)(buffer[1][wide_sample] + 0x8000);
1143                                                 }
1144                                         }
1145                                         else if(channels == 1) {
1146                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1147                                                         u16buffer[sample++] = (FLAC__uint16)(buffer[0][wide_sample] + 0x8000);
1148                                         }
1149                                         else { /* works for any 'channels' but above flavors are faster for 1 and 2 */
1150                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1151                                                         for(channel = 0; channel < channels; channel++, sample++)
1152                                                                 u16buffer[sample] = (FLAC__uint16)(buffer[channel][wide_sample] + 0x8000);
1153                                         }
1154                                 }
1155                                 else {
1156                                         if(channels == 2) {
1157                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++) {
1158                                                         s16buffer[sample++] = (FLAC__int16)(buffer[0][wide_sample]);
1159                                                         s16buffer[sample++] = (FLAC__int16)(buffer[1][wide_sample]);
1160                                                 }
1161                                         }
1162                                         else if(channels == 1) {
1163                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1164                                                         s16buffer[sample++] = (FLAC__int16)(buffer[0][wide_sample]);
1165                                         }
1166                                         else { /* works for any 'channels' but above flavors are faster for 1 and 2 */
1167                                                 for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1168                                                         for(channel = 0; channel < channels; channel++, sample++)
1169                                                                 s16buffer[sample] = (FLAC__int16)(buffer[channel][wide_sample]);
1170                                         }
1171                                 }
1172                                 if(is_big_endian != is_big_endian_host_) {
1173                                         unsigned char tmp;
1174                                         const unsigned bytes = sample * 2;
1175                                         for(byte = 0; byte < bytes; byte += 2) {
1176                                                 tmp = u8buffer[byte];
1177                                                 u8buffer[byte] = u8buffer[byte+1];
1178                                                 u8buffer[byte+1] = tmp;
1179                                         }
1180                                 }
1181                                 bytes_to_write = 2 * sample;
1182                         }
1183                         else if(bps+shift == 24) {
1184                                 if(is_unsigned_samples) {
1185                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1186                                                 for(channel = 0; channel < channels; channel++, sample++)
1187                                                         u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
1188                                 }
1189                                 else {
1190                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1191                                                 for(channel = 0; channel < channels; channel++, sample++)
1192                                                         s32buffer[sample] = buffer[channel][wide_sample];
1193                                 }
1194                                 if(is_big_endian != is_big_endian_host_) {
1195                                         unsigned char tmp;
1196                                         const unsigned bytes = sample * 4;
1197                                         for(byte = 0; byte < bytes; byte += 4) {
1198                                                 tmp = u8buffer[byte];
1199                                                 u8buffer[byte] = u8buffer[byte+3];
1200                                                 u8buffer[byte+3] = tmp;
1201                                                 tmp = u8buffer[byte+1];
1202                                                 u8buffer[byte+1] = u8buffer[byte+2];
1203                                                 u8buffer[byte+2] = tmp;
1204                                         }
1205                                 }
1206                                 if(is_big_endian) {
1207                                         unsigned lbyte;
1208                                         const unsigned bytes = sample * 4;
1209                                         for(lbyte = byte = 0; byte < bytes; ) {
1210                                                 byte++;
1211                                                 u8buffer[lbyte++] = u8buffer[byte++];
1212                                                 u8buffer[lbyte++] = u8buffer[byte++];
1213                                                 u8buffer[lbyte++] = u8buffer[byte++];
1214                                         }
1215                                 }
1216                                 else {
1217                                         unsigned lbyte;
1218                                         const unsigned bytes = sample * 4;
1219                                         for(lbyte = byte = 0; byte < bytes; ) {
1220                                                 u8buffer[lbyte++] = u8buffer[byte++];
1221                                                 u8buffer[lbyte++] = u8buffer[byte++];
1222                                                 u8buffer[lbyte++] = u8buffer[byte++];
1223                                                 byte++;
1224                                         }
1225                                 }
1226                                 bytes_to_write = 3 * sample;
1227                         }
1228                         else if(bps+shift == 8) {
1229                                 if(is_unsigned_samples) {
1230                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1231                                                 for(channel = 0; channel < channels; channel++, sample++)
1232                                                         u8buffer[sample] = (FLAC__uint8)(buffer[channel][wide_sample] + 0x80);
1233                                 }
1234                                 else {
1235                                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1236                                                 for(channel = 0; channel < channels; channel++, sample++)
1237                                                         s8buffer[sample] = (FLAC__int8)(buffer[channel][wide_sample]);
1238                                 }
1239                                 bytes_to_write = sample;
1240                         }
1241                         else {
1242                                 FLAC__ASSERT(0);
1243                                 /* double protection */
1244                                 decoder_session->abort_flag = true;
1245                                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1246                         }
1247                 }
1248         }
1249         if(bytes_to_write > 0) {
1250                 if(flac__utils_fwrite(u8buffer, 1, bytes_to_write, fout) != bytes_to_write) {
1251                         /* if a pipe closed when writing to stdout, we let it go without an error message */
1252                         if(errno == EPIPE && decoder_session->fout == stdout)
1253                                 decoder_session->aborting_due_to_until = true;
1254                         decoder_session->abort_flag = true;
1255                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1256                 }
1257         }
1258         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
1259 }
1260
1261 void metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1262 {
1263         DecoderSession *decoder_session = (DecoderSession*)client_data;
1264
1265         if(decoder_session->analysis_mode)
1266                 FLAC__stream_decoder_get_decode_position(decoder, &decoder_session->decode_position);
1267
1268         if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
1269                 FLAC__uint64 skip, until;
1270                 decoder_session->got_stream_info = true;
1271                 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);
1272                 decoder_session->bps = metadata->data.stream_info.bits_per_sample;
1273                 decoder_session->channels = metadata->data.stream_info.channels;
1274                 decoder_session->sample_rate = metadata->data.stream_info.sample_rate;
1275
1276                 flac__utils_canonicalize_skip_until_specification(decoder_session->skip_specification, decoder_session->sample_rate);
1277                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1278                 skip = (FLAC__uint64)decoder_session->skip_specification->value.samples;
1279
1280                 /* remember, metadata->data.stream_info.total_samples can be 0, meaning 'unknown' */
1281                 if(metadata->data.stream_info.total_samples > 0 && skip >= metadata->data.stream_info.total_samples) {
1282                         flac__utils_printf(stderr, 1, "%s: ERROR trying to --skip more samples than in stream\n", decoder_session->inbasefilename);
1283                         decoder_session->abort_flag = true;
1284                         return;
1285                 }
1286                 else if(metadata->data.stream_info.total_samples == 0 && skip > 0) {
1287                         flac__utils_printf(stderr, 1, "%s: ERROR, can't --skip when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1288                         decoder_session->abort_flag = true;
1289                         return;
1290                 }
1291                 FLAC__ASSERT(skip == 0 || 0 == decoder_session->cue_specification);
1292                 decoder_session->total_samples = metadata->data.stream_info.total_samples - skip;
1293
1294                 /* note that we use metadata->data.stream_info.total_samples instead of decoder_session->total_samples */
1295                 if(!canonicalize_until_specification(decoder_session->until_specification, decoder_session->inbasefilename, decoder_session->sample_rate, skip, metadata->data.stream_info.total_samples)) {
1296                         decoder_session->abort_flag = true;
1297                         return;
1298                 }
1299                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1300                 until = (FLAC__uint64)decoder_session->until_specification->value.samples;
1301
1302                 if(until > 0) {
1303                         FLAC__ASSERT(decoder_session->total_samples != 0);
1304                         FLAC__ASSERT(0 == decoder_session->cue_specification);
1305                         decoder_session->total_samples -= (metadata->data.stream_info.total_samples - until);
1306                 }
1307
1308                 if(decoder_session->bps < 4 || decoder_session->bps > 24) {
1309                         flac__utils_printf(stderr, 1, "%s: ERROR: bits per sample is %u, must be 4-24\n", decoder_session->inbasefilename, decoder_session->bps);
1310                         decoder_session->abort_flag = true;
1311                         return;
1312                 }
1313         }
1314         else if(metadata->type == FLAC__METADATA_TYPE_CUESHEET) {
1315                 /* remember, at this point, decoder_session->total_samples can be 0, meaning 'unknown' */
1316                 if(decoder_session->total_samples == 0) {
1317                         flac__utils_printf(stderr, 1, "%s: ERROR can't use --cue when FLAC metadata has total sample count of 0\n", decoder_session->inbasefilename);
1318                         decoder_session->abort_flag = true;
1319                         return;
1320                 }
1321
1322                 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);
1323
1324                 FLAC__ASSERT(!decoder_session->skip_specification->is_relative);
1325                 FLAC__ASSERT(decoder_session->skip_specification->value_is_samples);
1326
1327                 FLAC__ASSERT(!decoder_session->until_specification->is_relative);
1328                 FLAC__ASSERT(decoder_session->until_specification->value_is_samples);
1329
1330                 FLAC__ASSERT(decoder_session->skip_specification->value.samples >= 0);
1331                 FLAC__ASSERT(decoder_session->until_specification->value.samples >= 0);
1332                 FLAC__ASSERT((FLAC__uint64)decoder_session->until_specification->value.samples <= decoder_session->total_samples);
1333                 FLAC__ASSERT(decoder_session->skip_specification->value.samples <= decoder_session->until_specification->value.samples);
1334
1335                 decoder_session->total_samples = decoder_session->until_specification->value.samples - decoder_session->skip_specification->value.samples;
1336         }
1337         else if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
1338                 if (decoder_session->replaygain.spec.apply) {
1339                         double reference, gain, peak;
1340                         if (!(decoder_session->replaygain.apply = grabbag__replaygain_load_from_vorbiscomment(metadata, decoder_session->replaygain.spec.use_album_gain, /*strict=*/false, &reference, &gain, &peak))) {
1341                                 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");
1342                                 if(decoder_session->treat_warnings_as_errors) {
1343                                         decoder_session->abort_flag = true;
1344                                         return;
1345                                 }
1346                         }
1347                         else {
1348                                 const char *ls[] = { "no", "peak", "hard" };
1349                                 const char *ns[] = { "no", "low", "medium", "high" };
1350                                 decoder_session->replaygain.scale = grabbag__replaygain_compute_scale_factor(peak, gain, decoder_session->replaygain.spec.preamp, decoder_session->replaygain.spec.limiter == RGSS_LIMIT__PEAK);
1351                                 FLAC__ASSERT(decoder_session->bps > 0 && decoder_session->bps <= 32);
1352                                 FLAC__replaygain_synthesis__init_dither_context(&decoder_session->replaygain.dither_context, decoder_session->bps, decoder_session->replaygain.spec.noise_shaping);
1353                                 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]);
1354                                 flac__utils_printf(stderr, 1, "%s: WARNING: applying ReplayGain is not lossless\n", decoder_session->inbasefilename);
1355                                 /* don't check if(decoder_session->treat_warnings_as_errors) because the user explicitly asked for it */
1356                         }
1357                 }
1358                 (void)flac__utils_get_channel_mask_tag(metadata, &decoder_session->channel_mask);
1359         }
1360 }
1361
1362 void error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1363 {
1364         DecoderSession *decoder_session = (DecoderSession*)client_data;
1365         (void)decoder;
1366         if(!decoder_session->error_callback_suppress_messages)
1367                 flac__utils_printf(stderr, 1, "%s: *** Got error code %d:%s\n", decoder_session->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1368         if(!decoder_session->continue_through_decode_errors) {
1369                 /* if we got a sync error while looking for metadata, either it's not a FLAC file (more likely) or the file is corrupted */
1370                 if(
1371                         !decoder_session->error_callback_suppress_messages &&
1372                         status == FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC &&
1373                         FLAC__stream_decoder_get_state(decoder) == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
1374                 ) {
1375                         flac__utils_printf(stderr, 1,
1376                                 "\n"
1377                                 "The input file is either not a FLAC file or is corrupted.  If you are\n"
1378                                 "convinced it is a FLAC file, you can rerun the same command and add the\n"
1379                                 "-F parameter to try and recover as much as possible from the file.\n"
1380                         );
1381                         decoder_session->error_callback_suppress_messages = true;
1382                 }
1383                 else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
1384                         decoder_session->aborting_due_to_unparseable = true;
1385                 decoder_session->abort_flag = true;
1386         }
1387 }
1388
1389 void print_error_with_init_status(const DecoderSession *d, const char *message, FLAC__StreamDecoderInitStatus init_status)
1390 {
1391         const int ilen = strlen(d->inbasefilename) + 1;
1392
1393         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1394
1395         flac__utils_printf(stderr, 1, "%*s init status = %s\n", ilen, "", FLAC__StreamDecoderInitStatusString[init_status]);
1396
1397         /* print out some more info for some errors: */
1398         if (init_status == FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE) {
1399                 flac__utils_printf(stderr, 1,
1400                         "\n"
1401                         "An error occurred opening the input file; it is likely that it does not exist\n"
1402                         "or is not readable.\n"
1403                 );
1404         }
1405 }
1406
1407 void print_error_with_state(const DecoderSession *d, const char *message)
1408 {
1409         const int ilen = strlen(d->inbasefilename) + 1;
1410
1411         flac__utils_printf(stderr, 1, "\n%s: %s\n", d->inbasefilename, message);
1412         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", FLAC__stream_decoder_get_resolved_state_string(d->decoder));
1413
1414         /* print out some more info for some errors: */
1415         if (d->aborting_due_to_unparseable) {
1416                 flac__utils_printf(stderr, 1,
1417                         "\n"
1418                         "The FLAC stream may have been created by a more advanced encoder.  Try\n"
1419                         "  metaflac --show-vendor-tag %s\n"
1420                         "If the version number is greater than %s, this decoder is probably\n"
1421                         "not able to decode the file.  If the version number is not, the file\n"
1422                         "may be corrupted, or you may have found a bug.  In this case please\n"
1423                         "submit a bug report to\n"
1424                         "    http://sourceforge.net/bugs/?func=addbug&group_id=13478\n"
1425                         "Make sure to use the \"Monitor\" feature to monitor the bug status.\n",
1426                         d->inbasefilename, FLAC__VERSION_STRING
1427                 );
1428         }
1429 }
1430
1431 void print_stats(const DecoderSession *decoder_session)
1432 {
1433         if(flac__utils_verbosity_ >= 2) {
1434 #if defined _MSC_VER || defined __MINGW32__
1435                 /* with MSVC you have to spoon feed it the casting */
1436                 const double progress = (double)(FLAC__int64)decoder_session->samples_processed / (double)(FLAC__int64)decoder_session->total_samples * 100.0;
1437 #else
1438                 const double progress = (double)decoder_session->samples_processed / (double)decoder_session->total_samples * 100.0;
1439 #endif
1440                 if(decoder_session->total_samples > 0) {
1441                         fprintf(stderr, "\r%s: %s%u%% complete",
1442                                 decoder_session->inbasefilename,
1443                                 decoder_session->test_only? "testing, " : decoder_session->analysis_mode? "analyzing, " : "",
1444                                 (unsigned)floor(progress + 0.5)
1445                         );
1446                 }
1447                 else {
1448                         fprintf(stderr, "\r%s: %s %u samples",
1449                                 decoder_session->inbasefilename,
1450                                 decoder_session->test_only? "tested" : decoder_session->analysis_mode? "analyzed" : "wrote",
1451                                 (unsigned)decoder_session->samples_processed
1452                         );
1453                 }
1454         }
1455 }