src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002  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 defined _WIN32 && !defined __CYGWIN__
  20 /* where MSVC puts unlink() */
  21 # include <io.h>
  22 #else
  23 # include <unistd.h>
  24 #endif
  25 #include <limits.h> /* for LONG_MAX */
  26 #include <math.h> /* for floor() */
  27 #include <stdio.h> /* for FILE et al. */
  28 #include <stdlib.h> /* for malloc */
  29 #include <string.h> /* for strcmp() */
  30 #include "FLAC/all.h"
  31 #include "encode.h"
  32 #include "file.h"
  33 #ifdef FLAC__HAS_OGG
  34 #include "OggFLAC/stream_encoder.h"
  35 #endif
  36
  37 #ifdef min
  38 #undef min
  39 #endif
  40 #define min(x,y) ((x)<(y)?(x):(y))
  41
  42 /* this MUST be >= 588 so that sector aligning can take place with one read */
  43 #define CHUNK_OF_SAMPLES 2048
  44
  45 typedef struct {
  46         const char *inbasefilename;
  47         FILE *fout;
  48         const char *outfilename;
  49         FLAC__StreamEncoder *encoder;
  50         FLAC__bool verify;
  51         FLAC__bool verbose;
  52         FLAC__uint64 unencoded_size;
  53         FLAC__uint64 total_samples_to_encode;
  54         FLAC__uint64 bytes_written;
  55         FLAC__uint64 samples_written;
  56         FLAC__uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
  57         unsigned current_frame;
  58         FLAC__StreamMetadata *seek_table;
  59         unsigned first_seek_point_to_check;
  60         FLAC__bool verify_failed;
  61 #ifdef FLAC__HAS_OGG
  62         FLAC__bool use_ogg;
  63         OggFLAC__StreamEncoder *ogg_encoder;
  64 #endif
  65 } encoder_wrapper_struct;
  66
  67 static FLAC__bool is_big_endian_host;
  68
  69 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE+7)/8)];
  70 static signed char *scbuffer = (signed char *)ucbuffer;
  71 static FLAC__uint16 *usbuffer = (FLAC__uint16 *)ucbuffer;
  72 static FLAC__int16 *ssbuffer = (FLAC__int16 *)ucbuffer;
  73
  74 static FLAC__int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  75 static FLAC__int32 *input[FLAC__MAX_CHANNELS];
  76
  77 /* local routines */
  78 static FLAC__bool init(encoder_wrapper_struct *encoder_wrapper);
  79 static FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper);
  80 static FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, FLAC__StreamMetadata *seek_table);
  81 static void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps);
  82 static FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  83 static void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data);
  84 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
  85 static FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
  86 static FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
  87 static FLAC__bool read_big_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
  88 static FLAC__bool read_big_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
  89 static FLAC__bool read_sane_extended(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
  90 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
  91 static FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val);
  92
  93 int
  94 flac__encode_aif(FILE *infile, long infilesize, const char *infilename, const char *outfilename,
  95         const FLAC__byte *lookahead, unsigned lookahead_length, wav_encode_options_t options)
  96 {
  97         encoder_wrapper_struct encoder_wrapper;
  98         FLAC__uint16 x;
  99         FLAC__uint32 xx;
 100         unsigned int channels= 0U, bps= 0U, sample_rate= 0U, sample_frames= 0U;
 101         FLAC__bool got_comm_chunk= false, got_ssnd_chunk= false;
 102         int info_align_carry= -1, info_align_zero= -1;
 103         enum { NORMAL, DONE, ERROR, MISMATCH } status= NORMAL;
 104
 105         FLAC__ASSERT(!options.common.sector_align || options.common.skip == 0);
 106
 107         encoder_wrapper.encoder = 0;
 108         encoder_wrapper.verify = options.common.verify;
 109         encoder_wrapper.verbose = options.common.verbose;
 110         encoder_wrapper.bytes_written = 0;
 111         encoder_wrapper.samples_written = 0;
 112         encoder_wrapper.stream_offset = 0;
 113         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 114         encoder_wrapper.outfilename = outfilename;
 115         encoder_wrapper.seek_table = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
 116         encoder_wrapper.first_seek_point_to_check = 0;
 117         encoder_wrapper.verify_failed = false;
 118 #ifdef FLAC__HAS_OGG
 119         encoder_wrapper.use_ogg = options.common.use_ogg;
 120         encoder_wrapper.ogg_encoder = 0;
 121 #endif
 122
 123         if(0 == encoder_wrapper.seek_table) {
 124                 fprintf(stderr, "%s: ERROR allocating memory for seek table\n", encoder_wrapper.inbasefilename);
 125                 return 1;
 126         }
 127
 128         (void)infilesize; /* silence compiler warning about unused parameter */
 129         (void)lookahead; /* silence compiler warning about unused parameter */
 130         (void)lookahead_length; /* silence compiler warning about unused parameter */
 131
 132         if(0 == strcmp(outfilename, "-")) {
 133                 encoder_wrapper.fout = file__get_binary_stdout();
 134         }
 135         else {
 136                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 137                         fprintf(stderr, "%s: ERROR: can't open output file %s\n", encoder_wrapper.inbasefilename, outfilename);
 138                         if(infile != stdin)
 139                                 fclose(infile);
 140                         return 1;
 141                 }
 142         }
 143
 144         if(!init(&encoder_wrapper))
 145                 status= ERROR;
 146
 147         /* lookahead[] already has "FORMxxxxAIFF", do sub-chunks */
 148
 149         while(status==NORMAL) {
 150                 size_t c= 0U;
 151                 char chunk_id[4];
 152
 153                 /* chunk identifier; really conservative about behavior of fread() and feof() */
 154                 if(feof(infile) || ((c= fread(chunk_id, 1U, 4U, infile)), c==0U && feof(infile)))
 155                         status= DONE;
 156                 else if(c<4U || feof(infile)) {
 157                         fprintf(stderr, "%s: ERROR: incomplete chunk identifier\n", encoder_wrapper.inbasefilename);
 158                         status= ERROR;
 159                 }
 160
 161                 if(status==NORMAL && got_comm_chunk==false && !strncmp(chunk_id, "COMM", 4)) { /* common chunk */
 162                         unsigned long skip;
 163
 164                         if(status==NORMAL) {
 165                                 /* COMM chunk size */
 166                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 167                                         status= ERROR;
 168                                 else if(xx<18U) {
 169                                         fprintf(stderr, "%s: ERROR: non-standard 'COMM' chunk has length = %u\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 170                                         status= ERROR;
 171                                 }
 172                                 else if(xx!=18U)
 173                                         fprintf(stderr, "%s: WARNING: non-standard 'COMM' chunk has length = %u\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 174                                 skip= (xx-18U)+(xx & 1U);
 175                         }
 176
 177                         if(status==NORMAL) {
 178                                 /* number of channels */
 179                                 if(!read_big_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 180                                         status= ERROR;
 181                                 else if(x==0U || x>FLAC__MAX_CHANNELS) {
 182                                         fprintf(stderr, "%s: ERROR: unsupported number channels %u\n", encoder_wrapper.inbasefilename, (unsigned int)x);
 183                                         status= ERROR;
 184                                 }
 185                                 else if(options.common.sector_align && x!=2U) {
 186                                         fprintf(stderr, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned int)x);
 187                                         status= ERROR;
 188                                 }
 189                                 channels= x;
 190                         }
 191
 192                         if(status==NORMAL) {
 193                                 /* number of sample frames */
 194                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 195                                         status= ERROR;
 196                                 sample_frames= xx;
 197                         }
 198
 199                         if(status==NORMAL) {
 200                                 /* bits per sample */
 201                                 if(!read_big_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 202                                         status= ERROR;
 203                                 else if(x!=8U && x!=16U && x!=24U) {
 204                                         fprintf(stderr, "%s: ERROR: unsupported bits per sample %u\n", encoder_wrapper.inbasefilename, (unsigned int)x);
 205                                         status= ERROR;
 206                                 }
 207                                 else if(options.common.sector_align && x!=16U) {
 208                                         fprintf(stderr, "%s: ERROR: file has %u bits per sample, must be 16 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned int)x);
 209                                         status= ERROR;
 210                                 }
 211                                 bps= x;
 212                         }
 213
 214                         if(status==NORMAL) {
 215                                 /* sample rate */
 216                                 if(!read_sane_extended(infile, &xx, false, encoder_wrapper.inbasefilename))
 217                                         status= ERROR;
 218                                 else if(!FLAC__format_sample_rate_is_valid(xx)) {
 219                                         fprintf(stderr, "%s: ERROR: unsupported sample rate %u\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 220                                         status= ERROR;
 221                                 }
 222                                 else if(options.common.sector_align && xx!=44100U) {
 223                                         fprintf(stderr, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 224                                         status= ERROR;
 225                                 }
 226                                 sample_rate= xx;
 227                         }
 228
 229                         /* skip any extra data in the COMM chunk */
 230                         FLAC__ASSERT(skip<=LONG_MAX);
 231                         while(status==NORMAL && skip>0U && fseek(infile, skip, SEEK_CUR)<0) {
 232                                 unsigned int need= min(skip, sizeof ucbuffer);
 233                                 if(fread(ucbuffer, 1U, need, infile)<need) {
 234                                         fprintf(stderr, "%s: ERROR during read while skipping extra COMM data\n", encoder_wrapper.inbasefilename);
 235                                         status= ERROR;
 236                                 }
 237                                 skip-= need;
 238                         }
 239
 240                         got_comm_chunk= true;
 241                 }
 242                 else if(status==NORMAL && got_ssnd_chunk==false && !strncmp(chunk_id, "SSND", 4)) { /* sound data chunk */
 243                         unsigned int offset= 0U, block_size= 0U, align_remainder= 0U, data_bytes;
 244                         size_t bytes_per_frame= channels*(bps>>3);
 245                         FLAC__bool pad= false;
 246
 247                         if(status==NORMAL && got_comm_chunk==false) {
 248                                 fprintf(stderr, "%s: ERROR: got 'SSND' chunk before 'COMM' chunk\n", encoder_wrapper.inbasefilename);
 249                                 status= ERROR;
 250                         }
 251
 252                         if(status==NORMAL) {
 253                                 /* SSND chunk size */
 254                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 255                                         status= ERROR;
 256                                 else if(xx!=(sample_frames*bytes_per_frame + 8U)) {
 257                                         fprintf(stderr, "%s: ERROR: SSND chunk size inconsistent with sample frame count\n", encoder_wrapper.inbasefilename);
 258                                         status= ERROR;
 259                                 }
 260                                 data_bytes= xx;
 261                                 pad= (data_bytes & 1U) ? true : false;
 262                         }
 263
 264                         if(status==NORMAL) {
 265                                 /* offset */
 266                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 267                                         status= ERROR;
 268                                 else if(xx!=0U) {
 269                                         fprintf(stderr, "%s: ERROR: offset is %u; must be 0\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 270                                         status= ERROR;
 271                                 }
 272                                 offset= xx;
 273                         }
 274
 275                         if(status==NORMAL) {
 276                                 /* block size */
 277                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 278                                         status= ERROR;
 279                                 else if(xx!=0U) {
 280                                         fprintf(stderr, "%s: ERROR: block size is %u; must be 0\n", encoder_wrapper.inbasefilename, (unsigned int)xx);
 281                                         status= ERROR;
 282                                 }
 283                                 block_size= xx;
 284                         }
 285
 286                         if(status==NORMAL && options.common.skip>0U) {
 287                                 FLAC__uint64 remaining= options.common.skip*bytes_per_frame;
 288
 289                                 /* do 1<<30 bytes at a time, since 1<<30 is a nice round number, and */
 290                                 /* is guaranteed to be less than LONG_MAX */
 291                                 for(; remaining>0U; remaining-= remaining>(1U<<30) ? remaining : (1U<<30))
 292                                 {
 293                                         unsigned long skip= remaining % (1U<<30);
 294
 295                                         FLAC__ASSERT(skip<=LONG_MAX);
 296                                         while(status==NORMAL && skip>0 && fseek(infile, skip, SEEK_CUR)<0) {
 297                                                 unsigned int need= min(skip, sizeof ucbuffer);
 298                                                 if(fread(ucbuffer, 1U, need, infile)<need) {
 299                                                         fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 300                                                         status= ERROR;
 301                                                 }
 302                                                 skip-= need;
 303                                         }
 304                                 }
 305                         }
 306
 307                         if(status==NORMAL) {
 308                                 data_bytes-= (8U + (unsigned int)options.common.skip*bytes_per_frame); /*@@@ WATCHOUT: 4GB limit */
 309                                 encoder_wrapper.total_samples_to_encode= data_bytes/bytes_per_frame + *options.common.align_reservoir_samples;
 310                                 if(options.common.sector_align) {
 311                                         align_remainder= (unsigned int)(encoder_wrapper.total_samples_to_encode % 588U);
 312                                         if(options.common.is_last_file)
 313                                                 encoder_wrapper.total_samples_to_encode+= (588U-align_remainder); /* will pad with zeroes */
 314                                         else
 315                                                 encoder_wrapper.total_samples_to_encode-= align_remainder; /* will stop short and carry over to next file */
 316                                 }
 317
 318                                 /* +54 for the size of the AIFF headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 319                                 encoder_wrapper.unencoded_size= encoder_wrapper.total_samples_to_encode*bytes_per_frame+54;
 320
 321                                 if(!init_encoder(options.common, channels, bps, sample_rate, &encoder_wrapper))
 322                                         status= ERROR;
 323                         }
 324
 325                         /* first do any samples in the reservoir */
 326                         if(status==NORMAL && options.common.sector_align && *options.common.align_reservoir_samples>0U) {
 327
 328                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 *const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 329                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 330                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 331                                         status= ERROR;
 332                                 }
 333                         }
 334
 335                         /* decrement the data_bytes counter if we need to align the file */
 336                         if(status==NORMAL && options.common.sector_align) {
 337                                 if(options.common.is_last_file)
 338                                         *options.common.align_reservoir_samples= 0U;
 339                                 else {
 340                                         *options.common.align_reservoir_samples= align_remainder;
 341                                         data_bytes-= (*options.common.align_reservoir_samples)*bytes_per_frame;
 342                                 }
 343                         }
 344
 345                         /* now do from the file */
 346                         while(status==NORMAL && data_bytes>0) {
 347                                 size_t bytes_read= fread(ucbuffer, 1U, min(data_bytes, CHUNK_OF_SAMPLES*bytes_per_frame), infile);
 348
 349                                 if(bytes_read==0U) {
 350                                         if(ferror(infile)) {
 351                                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 352                                                 status= ERROR;
 353                                         }
 354                                         else if(feof(infile)) {
 355                                                 fprintf(stderr, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned int)encoder_wrapper.total_samples_to_encode, (unsigned int)encoder_wrapper.samples_written);
 356                                                 data_bytes= 0;
 357                                         }
 358                                 }
 359                                 else {
 360                                         if(bytes_read % bytes_per_frame != 0U) {
 361                                                 fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 362                                                 status= ERROR;
 363                                         }
 364                                         else {
 365                                                 unsigned int frames= bytes_read/bytes_per_frame;
 366                                                 format_input(input, frames, true, false, channels, bps);
 367
 368                                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 *const *)input, frames)) {
 369                                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 370                                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 371                                                         status= ERROR;
 372                                                 }
 373                                                 else
 374                                                         data_bytes-= bytes_read;
 375                                         }
 376                                 }
 377                         }
 378
 379                         /* now read unaligned samples into reservoir or pad with zeroes if necessary */
 380                         if(status==NORMAL && options.common.sector_align) {
 381                                 if(options.common.is_last_file) {
 382                                         unsigned int pad_frames= 588U-align_remainder;
 383
 384                                         if(pad_frames<588U) {
 385                                                 unsigned int i;
 386
 387                                                 info_align_zero= pad_frames;
 388                                                 for(i= 0U; i<channels; ++i)
 389                                                         memset(input[i], 0, pad_frames*(bps>>3));
 390
 391                                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 *const *)input, pad_frames)) {
 392                                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 393                                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 394                                                         status= ERROR;
 395                                                 }
 396                                         }
 397                                 }
 398                                 else {
 399                                         if(*options.common.align_reservoir_samples > 0) {
 400                                                 size_t bytes_read= fread(ucbuffer, 1U, (*options.common.align_reservoir_samples)*bytes_per_frame, infile);
 401
 402                                                 FLAC__ASSERT(CHUNK_OF_SAMPLES>=588U);
 403                                                 if(bytes_read==0U && ferror(infile)) {
 404                                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 405                                                         status= ERROR;
 406                                                 }
 407                                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_frame)
 408                                                         fprintf(stderr, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned int)bytes_read, (unsigned int)encoder_wrapper.total_samples_to_encode, (unsigned int)encoder_wrapper.samples_written);
 409                                                 else {
 410                                                         info_align_carry= *options.common.align_reservoir_samples;
 411                                                         format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, true, false, channels, bps);
 412                                                 }
 413                                         }
 414                                 }
 415                         }
 416
 417                         if(status==NORMAL && pad==true) {
 418                                 unsigned char tmp;
 419
 420                                 if(fread(&tmp, 1U, 1U, infile)<1U) {
 421                                         fprintf(stderr, "%s: ERROR during read of SSND pad byte\n", encoder_wrapper.inbasefilename);
 422                                         status= ERROR;
 423                                 }
 424                         }
 425
 426                         got_ssnd_chunk= true;
 427                 }
 428                 else if(status==NORMAL) { /* other chunk */
 429                         if(!strncmp(chunk_id, "COMM", 4))
 430                                 fprintf(stderr, "%s: WARNING: skipping extra 'COMM' chunk\n", encoder_wrapper.inbasefilename);
 431                         else if(!strncmp(chunk_id, "SSND", 4))
 432                                 fprintf(stderr, "%s: WARNING: skipping extra 'SSND' chunk\n", encoder_wrapper.inbasefilename);
 433                         else
 434                                 fprintf(stderr, "%s: WARNING: skipping unknown chunk '%s'\n", encoder_wrapper.inbasefilename, chunk_id);
 435
 436                         /* chunk size */
 437                         if(!read_big_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 438                                 status= ERROR;
 439                         else {
 440                                 unsigned long skip= xx+(xx & 1U);
 441
 442                                 FLAC__ASSERT(skip<=LONG_MAX);
 443                                 while(status==NORMAL && skip>0U && fseek(infile, skip, SEEK_CUR)<0) {
 444                                         unsigned int need= min(skip, sizeof ucbuffer);
 445                                         if(fread(ucbuffer, 1U, need, infile)<need) {
 446                                                 fprintf(stderr, "%s: ERROR during read while skipping unknown chunk\n", encoder_wrapper.inbasefilename);
 447                                                 status= ERROR;
 448                                         }
 449                                         skip-= need;
 450                                 }
 451                         }
 452                 }
 453         }
 454
 455         if(got_ssnd_chunk==false && sample_frames!=0U) {
 456                 fprintf(stderr, "%s: ERROR: missing SSND chunk\n", encoder_wrapper.inbasefilename);
 457                 status= ERROR;
 458         }
 459
 460         if(encoder_wrapper.encoder) {
 461                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 462                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 463         }
 464         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 465                 if(status==DONE)
 466                         print_stats(&encoder_wrapper);
 467                 fprintf(stderr, "\n");
 468         }
 469
 470         if(0 != encoder_wrapper.seek_table)
 471                 FLAC__metadata_object_delete(encoder_wrapper.seek_table);
 472         if(options.common.verify) {
 473                 if(encoder_wrapper.verify_failed) {
 474                         fprintf(stderr, "Verify FAILED!  Do not trust %s\n", outfilename);
 475                         status= MISMATCH;
 476                 }
 477         }
 478
 479         if(infile != stdin)
 480                 fclose(infile);
 481
 482         if(status==DONE) {
 483                 if(info_align_carry >= 0)
 484                         fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
 485                 if(info_align_zero >= 0)
 486                         fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
 487         }
 488         else if(status==ERROR)
 489                 unlink(outfilename);
 490
 491         return status==ERROR || status==MISMATCH;
 492 }
 493
 494 int flac__encode_wav(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, wav_encode_options_t options)
 495 {
 496         encoder_wrapper_struct encoder_wrapper;
 497         FLAC__bool is_unsigned_samples = false;
 498         unsigned channels = 0, bps = 0, sample_rate = 0, data_bytes;
 499         size_t bytes_per_wide_sample, bytes_read;
 500         FLAC__uint16 x;
 501         FLAC__uint32 xx;
 502         FLAC__bool got_fmt_chunk = false, got_data_chunk = false;
 503         unsigned align_remainder = 0;
 504         int info_align_carry = -1, info_align_zero = -1;
 505
 506         FLAC__ASSERT(!options.common.sector_align || options.common.skip == 0);
 507
 508         encoder_wrapper.encoder = 0;
 509         encoder_wrapper.verify = options.common.verify;
 510         encoder_wrapper.verbose = options.common.verbose;
 511         encoder_wrapper.bytes_written = 0;
 512         encoder_wrapper.samples_written = 0;
 513         encoder_wrapper.stream_offset = 0;
 514         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 515         encoder_wrapper.outfilename = outfilename;
 516         encoder_wrapper.seek_table = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
 517         encoder_wrapper.first_seek_point_to_check = 0;
 518         encoder_wrapper.verify_failed = false;
 519 #ifdef FLAC__HAS_OGG
 520         encoder_wrapper.use_ogg = options.common.use_ogg;
 521         encoder_wrapper.ogg_encoder = 0;
 522 #endif
 523         (void)infilesize;
 524         (void)lookahead;
 525         (void)lookahead_length;
 526
 527         if(0 == encoder_wrapper.seek_table) {
 528                 fprintf(stderr, "%s: ERROR allocating memory for seek table\n", encoder_wrapper.inbasefilename);
 529                 return 1;
 530         }
 531
 532         if(0 == strcmp(outfilename, "-")) {
 533                 encoder_wrapper.fout = file__get_binary_stdout();
 534         }
 535         else {
 536                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 537                         fprintf(stderr, "%s: ERROR: can't open output file %s\n", encoder_wrapper.inbasefilename, outfilename);
 538                         if(infile != stdin)
 539                                 fclose(infile);
 540                         return 1;
 541                 }
 542         }
 543
 544         if(!init(&encoder_wrapper))
 545                 goto wav_abort_;
 546
 547         /*
 548          * lookahead[] already has "RIFFxxxxWAVE", do sub-chunks
 549          */
 550         while(!feof(infile)) {
 551                 if(!read_little_endian_uint32(infile, &xx, true, encoder_wrapper.inbasefilename))
 552                         goto wav_abort_;
 553                 if(feof(infile))
 554                         break;
 555                 if(xx == 0x20746d66 && !got_fmt_chunk) { /* "fmt " */
 556                         /* fmt sub-chunk size */
 557                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 558                                 goto wav_abort_;
 559                         if(xx < 16) {
 560                                 fprintf(stderr, "%s: ERROR: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 561                                 goto wav_abort_;
 562                         }
 563                         else if(xx != 16 && xx != 18) {
 564                                 fprintf(stderr, "%s: WARNING: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 565                         }
 566                         data_bytes = xx;
 567                         /* compression code */
 568                         if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 569                                 goto wav_abort_;
 570                         if(x != 1) {
 571                                 fprintf(stderr, "%s: ERROR: unsupported compression type %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 572                                 goto wav_abort_;
 573                         }
 574                         /* number of channels */
 575                         if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 576                                 goto wav_abort_;
 577                         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 578                                 fprintf(stderr, "%s: ERROR: unsupported number channels %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 579                                 goto wav_abort_;
 580                         }
 581                         else if(options.common.sector_align && x != 2) {
 582                                 fprintf(stderr, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)x);
 583                                 goto wav_abort_;
 584                         }
 585                         channels = x;
 586                         /* sample rate */
 587                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 588                                 goto wav_abort_;
 589                         if(!FLAC__format_sample_rate_is_valid(xx)) {
 590                                 fprintf(stderr, "%s: ERROR: unsupported sample rate %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 591                                 goto wav_abort_;
 592                         }
 593                         else if(options.common.sector_align && xx != 44100) {
 594                                 fprintf(stderr, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 595                                 goto wav_abort_;
 596                         }
 597                         sample_rate = xx;
 598                         /* avg bytes per second (ignored) */
 599                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 600                                 goto wav_abort_;
 601                         /* block align (ignored) */
 602                         if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 603                                 goto wav_abort_;
 604                         /* bits per sample */
 605                         if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 606                                 goto wav_abort_;
 607                         if(x != 8 && x != 16 && x != 24) {
 608                                 fprintf(stderr, "%s: ERROR: unsupported bits per sample %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 609                                 goto wav_abort_;
 610                         }
 611                         else if(options.common.sector_align && x != 16) {
 612                                 fprintf(stderr, "%s: ERROR: file has %u bits per sample, must be 16 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)x);
 613                                 goto wav_abort_;
 614                         }
 615                         bps = x;
 616                         is_unsigned_samples = (x == 8);
 617
 618                         /* skip any extra data in the fmt sub-chunk */
 619                         data_bytes -= 16;
 620                         if(data_bytes > 0) {
 621                                 unsigned left, need;
 622                                 for(left = data_bytes; left > 0; ) {
 623                                         need = min(left, CHUNK_OF_SAMPLES);
 624                                         if(fread(ucbuffer, 1U, need, infile) < need) {
 625                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 626                                                 goto wav_abort_;
 627                                         }
 628                                         left -= need;
 629                                 }
 630                         }
 631
 632                         got_fmt_chunk = true;
 633                 }
 634                 else if(xx == 0x61746164 && !got_data_chunk && got_fmt_chunk) { /* "data" */
 635                         /* data size */
 636                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 637                                 goto wav_abort_;
 638                         data_bytes = xx;
 639
 640                         bytes_per_wide_sample = channels * (bps >> 3);
 641
 642                         if(options.common.skip > 0) {
 643                                 if(fseek(infile, bytes_per_wide_sample * (unsigned)options.common.skip, SEEK_CUR) < 0) {
 644                                         /* can't seek input, read ahead manually... */
 645                                         unsigned left, need;
 646                                         for(left = (unsigned)options.common.skip; left > 0; ) { /*@@@ WATCHOUT: 4GB limit */
 647                                                 need = min(left, CHUNK_OF_SAMPLES);
 648                                                 if(fread(ucbuffer, bytes_per_wide_sample, need, infile) < need) {
 649                                                         fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 650                                                         goto wav_abort_;
 651                                                 }
 652                                                 left -= need;
 653                                         }
 654                                 }
 655                         }
 656
 657                         data_bytes -= (unsigned)options.common.skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
 658                         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample + *options.common.align_reservoir_samples;
 659                         if(options.common.sector_align) {
 660                                 align_remainder = (unsigned)(encoder_wrapper.total_samples_to_encode % 588);
 661                                 if(options.common.is_last_file)
 662                                         encoder_wrapper.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 663                                 else
 664                                         encoder_wrapper.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 665                         }
 666
 667                         /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 668                         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44;
 669
 670                         if(!init_encoder(options.common, channels, bps, sample_rate, &encoder_wrapper))
 671                                 goto wav_abort_;
 672
 673                         /*
 674                          * first do any samples in the reservoir
 675                          */
 676                         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
 677                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 678                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 679                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 680                                         goto wav_abort_;
 681                                 }
 682                         }
 683
 684                         /*
 685                          * decrement the data_bytes counter if we need to align the file
 686                          */
 687                         if(options.common.sector_align) {
 688                                 if(options.common.is_last_file) {
 689                                         *options.common.align_reservoir_samples = 0;
 690                                 }
 691                                 else {
 692                                         *options.common.align_reservoir_samples = align_remainder;
 693                                         data_bytes -= (*options.common.align_reservoir_samples) * bytes_per_wide_sample;
 694                                 }
 695                         }
 696
 697                         /*
 698                          * now do from the file
 699                          */
 700                         while(data_bytes > 0) {
 701                                 bytes_read = fread(ucbuffer, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
 702                                 if(bytes_read == 0) {
 703                                         if(ferror(infile)) {
 704                                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 705                                                 goto wav_abort_;
 706                                         }
 707                                         else if(feof(infile)) {
 708                                                 fprintf(stderr, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned)encoder_wrapper.total_samples_to_encode, (unsigned)encoder_wrapper.samples_written);
 709                                                 data_bytes = 0;
 710                                         }
 711                                 }
 712                                 else {
 713                                         if(bytes_read % bytes_per_wide_sample != 0) {
 714                                                 fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 715                                                 goto wav_abort_;
 716                                         }
 717                                         else {
 718                                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 719                                                 format_input(input, wide_samples, false, is_unsigned_samples, channels, bps);
 720
 721                                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
 722                                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 723                                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 724                                                         goto wav_abort_;
 725                                                 }
 726                                                 data_bytes -= bytes_read;
 727                                         }
 728                                 }
 729                         }
 730
 731                         /*
 732                          * now read unaligned samples into reservoir or pad with zeroes if necessary
 733                          */
 734                         if(options.common.sector_align) {
 735                                 if(options.common.is_last_file) {
 736                                         unsigned wide_samples = 588 - align_remainder;
 737                                         if(wide_samples < 588) {
 738                                                 unsigned channel;
 739
 740                                                 info_align_zero = wide_samples;
 741                                                 data_bytes = wide_samples * (bps >> 3);
 742                                                 for(channel = 0; channel < channels; channel++)
 743                                                         memset(input[channel], 0, data_bytes);
 744
 745                                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
 746                                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 747                                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 748                                                         goto wav_abort_;
 749                                                 }
 750                                         }
 751                                 }
 752                                 else {
 753                                         if(*options.common.align_reservoir_samples > 0) {
 754                                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
 755                                                 bytes_read = fread(ucbuffer, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
 756                                                 if(bytes_read == 0 && ferror(infile)) {
 757                                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 758                                                         goto wav_abort_;
 759                                                 }
 760                                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
 761                                                         fprintf(stderr, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned)bytes_read, (unsigned)encoder_wrapper.total_samples_to_encode, (unsigned)encoder_wrapper.samples_written);
 762                                                         data_bytes = 0;
 763                                                 }
 764                                                 else {
 765                                                         info_align_carry = *options.common.align_reservoir_samples;
 766                                                         format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, false, is_unsigned_samples, channels, bps);
 767                                                 }
 768                                         }
 769                                 }
 770                         }
 771
 772                         got_data_chunk = true;
 773                 }
 774                 else {
 775                         if(xx == 0x20746d66 && got_fmt_chunk) { /* "fmt " */
 776                                 fprintf(stderr, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_wrapper.inbasefilename);
 777                         }
 778                         else if(xx == 0x61746164) { /* "data" */
 779                                 if(got_data_chunk) {
 780                                         fprintf(stderr, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_wrapper.inbasefilename);
 781                                 }
 782                                 else if(!got_fmt_chunk) {
 783                                         fprintf(stderr, "%s: ERROR: got 'data' sub-chunk before 'fmt' sub-chunk\n", encoder_wrapper.inbasefilename);
 784                                         goto wav_abort_;
 785                                 }
 786                                 else {
 787                                         FLAC__ASSERT(0);
 788                                 }
 789                         }
 790                         else {
 791                                 fprintf(stderr, "%s: WARNING: skipping unknown sub-chunk '%c%c%c%c'\n", encoder_wrapper.inbasefilename, (char)(xx&255), (char)((xx>>8)&255), (char)((xx>>16)&255), (char)(xx>>24));
 792                         }
 793                         /* sub-chunk size */
 794                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 795                                 goto wav_abort_;
 796                         if(fseek(infile, xx, SEEK_CUR) < 0) {
 797                                 /* can't seek input, read ahead manually... */
 798                                 unsigned left, need;
 799                                 const unsigned chunk = sizeof(ucbuffer);
 800                                 for(left = xx; left > 0; ) {
 801                                         need = min(left, chunk);
 802                                         if(fread(ucbuffer, 1, need, infile) < need) {
 803                                                 fprintf(stderr, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_wrapper.inbasefilename);
 804                                                 goto wav_abort_;
 805                                         }
 806                                         left -= need;
 807                                 }
 808                         }
 809                 }
 810         }
 811
 812         if(encoder_wrapper.encoder) {
 813                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 814                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 815         }
 816         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 817                 print_stats(&encoder_wrapper);
 818                 fprintf(stderr, "\n");
 819         }
 820         if(0 != encoder_wrapper.seek_table)
 821                 FLAC__metadata_object_delete(encoder_wrapper.seek_table);
 822         if(options.common.verify) {
 823                 if(encoder_wrapper.verify_failed) {
 824                         fprintf(stderr, "Verify FAILED!  Do not trust %s\n", outfilename);
 825                         return 1;
 826                 }
 827         }
 828         if(info_align_carry >= 0)
 829                 fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
 830         if(info_align_zero >= 0)
 831                 fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
 832         if(infile != stdin)
 833                 fclose(infile);
 834         return 0;
 835 wav_abort_:
 836         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 837                 fprintf(stderr, "\n");
 838         if(encoder_wrapper.encoder) {
 839                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 840                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 841         }
 842         if(0 != encoder_wrapper.seek_table)
 843                 FLAC__metadata_object_delete(encoder_wrapper.seek_table);
 844         if(options.common.verify) {
 845                 if(encoder_wrapper.verify_failed) {
 846                         fprintf(stderr, "Verify FAILED!  Do not trust %s\n", outfilename);
 847                         return 1;
 848                 }
 849         }
 850         if(infile != stdin)
 851                 fclose(infile);
 852         unlink(outfilename);
 853         return 1;
 854 }
 855
 856 int flac__encode_raw(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, raw_encode_options_t options)
 857 {
 858         encoder_wrapper_struct encoder_wrapper;
 859         size_t bytes_read;
 860         const size_t bytes_per_wide_sample = options.channels * (options.bps >> 3);
 861         unsigned align_remainder = 0;
 862         int info_align_carry = -1, info_align_zero = -1;
 863
 864         FLAC__ASSERT(!options.common.sector_align || options.common.skip == 0);
 865         FLAC__ASSERT(!options.common.sector_align || options.channels == 2);
 866         FLAC__ASSERT(!options.common.sector_align || options.bps == 16);
 867         FLAC__ASSERT(!options.common.sector_align || options.sample_rate == 44100);
 868         FLAC__ASSERT(!options.common.sector_align || infilesize >= 0);
 869
 870         encoder_wrapper.encoder = 0;
 871         encoder_wrapper.verify = options.common.verify;
 872         encoder_wrapper.verbose = options.common.verbose;
 873         encoder_wrapper.bytes_written = 0;
 874         encoder_wrapper.samples_written = 0;
 875         encoder_wrapper.stream_offset = 0;
 876         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 877         encoder_wrapper.outfilename = outfilename;
 878         encoder_wrapper.seek_table = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
 879         encoder_wrapper.first_seek_point_to_check = 0;
 880         encoder_wrapper.verify_failed = false;
 881 #ifdef FLAC__HAS_OGG
 882         encoder_wrapper.use_ogg = options.common.use_ogg;
 883         encoder_wrapper.ogg_encoder = 0;
 884 #endif
 885
 886         if(0 == encoder_wrapper.seek_table) {
 887                 fprintf(stderr, "%s: ERROR allocating memory for seek table\n", encoder_wrapper.inbasefilename);
 888                 return 1;
 889         }
 890
 891         if(0 == strcmp(outfilename, "-")) {
 892                 encoder_wrapper.fout = file__get_binary_stdout();
 893         }
 894         else {
 895                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 896                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
 897                         if(infile != stdin)
 898                                 fclose(infile);
 899                         return 1;
 900                 }
 901         }
 902
 903         if(!init(&encoder_wrapper))
 904                 goto raw_abort_;
 905
 906         /* get the file length */
 907         if(infilesize < 0) {
 908                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 909         }
 910         else {
 911                 if(options.common.sector_align) {
 912                         FLAC__ASSERT(options.common.skip == 0);
 913                         encoder_wrapper.total_samples_to_encode = (unsigned)infilesize / bytes_per_wide_sample + *options.common.align_reservoir_samples;
 914                         align_remainder = (unsigned)(encoder_wrapper.total_samples_to_encode % 588);
 915                         if(options.common.is_last_file)
 916                                 encoder_wrapper.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 917                         else
 918                                 encoder_wrapper.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 919                 }
 920                 else {
 921                         encoder_wrapper.total_samples_to_encode = (unsigned)infilesize / bytes_per_wide_sample - options.common.skip;
 922                 }
 923
 924                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample;
 925         }
 926
 927         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode <= 0)
 928                 fprintf(stderr, "(No runtime statistics possible; please wait for encoding to finish...)\n");
 929
 930         if(options.common.skip > 0) {
 931                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)options.common.skip;
 932                 if(skip_bytes > lookahead_length) {
 933                         skip_bytes -= lookahead_length;
 934                         lookahead_length = 0;
 935                         if(fseek(infile, (long)skip_bytes, SEEK_CUR) < 0) {
 936                                 /* can't seek input, read ahead manually... */
 937                                 unsigned left, need;
 938                                 const unsigned chunk = sizeof(ucbuffer);
 939                                 for(left = skip_bytes; left > 0; ) {
 940                                         need = min(left, chunk);
 941                                         if(fread(ucbuffer, 1, need, infile) < need) {
 942                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 943                                                 goto raw_abort_;
 944                                         }
 945                                         left -= need;
 946                                 }
 947                         }
 948                 }
 949                 else {
 950                         lookahead += skip_bytes;
 951                         lookahead_length -= skip_bytes;
 952                 }
 953         }
 954
 955         if(!init_encoder(options.common, options.channels, options.bps, options.sample_rate, &encoder_wrapper))
 956                 goto raw_abort_;
 957
 958         /*
 959          * first do any samples in the reservoir
 960          */
 961         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
 962                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 963                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
 964                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
 965                         goto raw_abort_;
 966                 }
 967         }
 968
 969         /*
 970          * decrement infilesize if we need to align the file
 971          */
 972         if(options.common.sector_align) {
 973                 FLAC__ASSERT(infilesize >= 0);
 974                 if(options.common.is_last_file) {
 975                         *options.common.align_reservoir_samples = 0;
 976                 }
 977                 else {
 978                         *options.common.align_reservoir_samples = align_remainder;
 979                         infilesize -= (long)((*options.common.align_reservoir_samples) * bytes_per_wide_sample);
 980                 }
 981         }
 982
 983         /*
 984          * now do from the file
 985          */
 986         while(!feof(infile)) {
 987                 if(lookahead_length > 0) {
 988                         FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
 989                         memcpy(ucbuffer, lookahead, lookahead_length);
 990                         bytes_read = fread(ucbuffer+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
 991                         if(ferror(infile)) {
 992                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 993                                 goto raw_abort_;
 994                         }
 995                         lookahead_length = 0;
 996                 }
 997                 else
 998                         bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
 999
1000                 if(bytes_read == 0) {
1001                         if(ferror(infile)) {
1002                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
1003                                 goto raw_abort_;
1004                         }
1005                 }
1006                 else if(bytes_read % bytes_per_wide_sample != 0) {
1007                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
1008                         goto raw_abort_;
1009                 }
1010                 else {
1011                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
1012                         format_input(input, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps);
1013
1014                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
1015                                 fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
1016                                 encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
1017                                 goto raw_abort_;
1018                         }
1019                 }
1020         }
1021
1022         /*
1023          * now read unaligned samples into reservoir or pad with zeroes if necessary
1024          */
1025         if(options.common.sector_align) {
1026                 if(options.common.is_last_file) {
1027                         unsigned wide_samples = 588 - align_remainder;
1028                         if(wide_samples < 588) {
1029                                 unsigned channel, data_bytes;
1030
1031                                 info_align_zero = wide_samples;
1032                                 data_bytes = wide_samples * (options.bps >> 3);
1033                                 for(channel = 0; channel < options.channels; channel++)
1034                                         memset(input[channel], 0, data_bytes);
1035
1036                                 if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
1037                                         fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
1038                                         encoder_wrapper.verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
1039                                         goto raw_abort_;
1040                                 }
1041                         }
1042                 }
1043                 else {
1044                         if(*options.common.align_reservoir_samples > 0) {
1045                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
1046                                 bytes_read = fread(ucbuffer, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
1047                                 if(bytes_read == 0 && ferror(infile)) {
1048                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
1049                                         goto raw_abort_;
1050                                 }
1051                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
1052                                         fprintf(stderr, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned)bytes_read, (unsigned)encoder_wrapper.total_samples_to_encode, (unsigned)encoder_wrapper.samples_written);
1053                                 }
1054                                 else {
1055                                         info_align_carry = *options.common.align_reservoir_samples;
1056                                         format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, false, options.is_unsigned_samples, options.channels, options.bps);
1057                                 }
1058                         }
1059                 }
1060         }
1061
1062         if(encoder_wrapper.encoder) {
1063                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
1064                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
1065         }
1066         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
1067                 print_stats(&encoder_wrapper);
1068                 fprintf(stderr, "\n");
1069         }
1070         if(0 != encoder_wrapper.seek_table)
1071                 FLAC__metadata_object_delete(encoder_wrapper.seek_table);
1072         if(options.common.verify) {
1073                 if(encoder_wrapper.verify_failed) {
1074                         fprintf(stderr, "Verify FAILED!  Do not trust %s\n", outfilename);
1075                         return 1;
1076                 }
1077         }
1078         if(info_align_carry >= 0)
1079                 fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
1080         if(info_align_zero >= 0)
1081                 fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
1082         if(infile != stdin)
1083                 fclose(infile);
1084         return 0;
1085 raw_abort_:
1086         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
1087                 fprintf(stderr, "\n");
1088         if(encoder_wrapper.encoder) {
1089                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
1090                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
1091         }
1092         if(0 != encoder_wrapper.seek_table)
1093                 FLAC__metadata_object_delete(encoder_wrapper.seek_table);
1094         if(options.common.verify) {
1095                 if(encoder_wrapper.verify_failed) {
1096                         fprintf(stderr, "Verify FAILED!  Do not trust %s\n", outfilename);
1097                         return 1;
1098                 }
1099         }
1100         if(infile != stdin)
1101                 fclose(infile);
1102         unlink(outfilename);
1103         return 1;
1104 }
1105
1106 FLAC__bool init(encoder_wrapper_struct *encoder_wrapper)
1107 {
1108         unsigned i;
1109         FLAC__uint32 test = 1;
1110
1111         is_big_endian_host = (*((FLAC__byte*)(&test)))? false : true;
1112
1113         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
1114                 input[i] = &(in[i][0]);
1115
1116         encoder_wrapper->encoder = FLAC__stream_encoder_new();
1117         if(0 == encoder_wrapper->encoder) {
1118                 fprintf(stderr, "%s: ERROR creating the encoder instance\n", encoder_wrapper->inbasefilename);
1119                 return false;
1120         }
1121
1122         return true;
1123 }
1124
1125 FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper)
1126 {
1127         unsigned num_metadata;
1128         FLAC__StreamMetadata padding;
1129         FLAC__StreamMetadata *metadata[2];
1130
1131         if(channels != 2)
1132                 options.do_mid_side = options.loose_mid_side = false;
1133
1134         if(!convert_to_seek_table(options.requested_seek_points, options.num_requested_seek_points, encoder_wrapper->total_samples_to_encode, encoder_wrapper->seek_table)) {
1135                 fprintf(stderr, "%s: ERROR allocating memory for seek table\n", encoder_wrapper->inbasefilename);
1136                 return false;
1137         }
1138
1139         num_metadata = 0;
1140         if(encoder_wrapper->seek_table->data.seek_table.num_points > 0) {
1141                 encoder_wrapper->seek_table->is_last = false; /* the encoder will set this for us */
1142                 metadata[num_metadata++] = encoder_wrapper->seek_table;
1143         }
1144         if(options.padding > 0) {
1145                 padding.is_last = false; /* the encoder will set this for us */
1146                 padding.type = FLAC__METADATA_TYPE_PADDING;
1147                 padding.length = (unsigned)options.padding;
1148                 metadata[num_metadata++] = &padding;
1149         }
1150
1151         FLAC__stream_encoder_set_verify(encoder_wrapper->encoder, options.verify);
1152         FLAC__stream_encoder_set_streamable_subset(encoder_wrapper->encoder, !options.lax);
1153         FLAC__stream_encoder_set_do_mid_side_stereo(encoder_wrapper->encoder, options.do_mid_side);
1154         FLAC__stream_encoder_set_loose_mid_side_stereo(encoder_wrapper->encoder, options.loose_mid_side);
1155         FLAC__stream_encoder_set_channels(encoder_wrapper->encoder, channels);
1156         FLAC__stream_encoder_set_bits_per_sample(encoder_wrapper->encoder, bps);
1157         FLAC__stream_encoder_set_sample_rate(encoder_wrapper->encoder, sample_rate);
1158         FLAC__stream_encoder_set_blocksize(encoder_wrapper->encoder, options.blocksize);
1159         FLAC__stream_encoder_set_max_lpc_order(encoder_wrapper->encoder, options.max_lpc_order);
1160         FLAC__stream_encoder_set_qlp_coeff_precision(encoder_wrapper->encoder, options.qlp_coeff_precision);
1161         FLAC__stream_encoder_set_do_qlp_coeff_prec_search(encoder_wrapper->encoder, options.do_qlp_coeff_prec_search);
1162         FLAC__stream_encoder_set_do_escape_coding(encoder_wrapper->encoder, options.do_escape_coding);
1163         FLAC__stream_encoder_set_do_exhaustive_model_search(encoder_wrapper->encoder, options.do_exhaustive_model_search);
1164         FLAC__stream_encoder_set_min_residual_partition_order(encoder_wrapper->encoder, options.min_residual_partition_order);
1165         FLAC__stream_encoder_set_max_residual_partition_order(encoder_wrapper->encoder, options.max_residual_partition_order);
1166         FLAC__stream_encoder_set_rice_parameter_search_dist(encoder_wrapper->encoder, options.rice_parameter_search_dist);
1167         FLAC__stream_encoder_set_total_samples_estimate(encoder_wrapper->encoder, encoder_wrapper->total_samples_to_encode);
1168         FLAC__stream_encoder_set_metadata(encoder_wrapper->encoder, (num_metadata > 0)? metadata : 0, num_metadata);
1169         FLAC__stream_encoder_set_write_callback(encoder_wrapper->encoder, write_callback);
1170         FLAC__stream_encoder_set_metadata_callback(encoder_wrapper->encoder, metadata_callback);
1171         FLAC__stream_encoder_set_client_data(encoder_wrapper->encoder, encoder_wrapper);
1172
1173         if(FLAC__stream_encoder_init(encoder_wrapper->encoder) != FLAC__STREAM_ENCODER_OK) {
1174                 fprintf(stderr, "%s: ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper->encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper->encoder)]);
1175                 encoder_wrapper->verify_failed = (FLAC__stream_encoder_get_state(encoder_wrapper->encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA);
1176                 return false;
1177         }
1178
1179         /* the above call writes all the metadata, so we save the stream offset now */
1180         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
1181
1182         return true;
1183 }
1184
1185 FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, FLAC__StreamMetadata *seek_table)
1186 {
1187         unsigned i, real_points, placeholders;
1188         char *pt = requested_seek_points, *q;
1189
1190         if(num_requested_seek_points == 0)
1191                 return true;
1192
1193         if(num_requested_seek_points < 0) {
1194                 strcpy(requested_seek_points, "100x<");
1195                 num_requested_seek_points = 1;
1196         }
1197
1198         /* first count how many individual seek points we may need */
1199         real_points = placeholders = 0;
1200         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
1201                 q = strchr(pt, '<');
1202                 FLAC__ASSERT(0 != q);
1203                 *q = '\0';
1204
1205                 if(0 == strcmp(pt, "X")) { /* -S X */
1206                         placeholders++;
1207                 }
1208                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
1209                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
1210                                 real_points += (unsigned)atoi(pt);
1211                 }
1212                 else { /* -S # */
1213                         real_points++;
1214                 }
1215                 *q++ = '<';
1216
1217                 pt = q;
1218         }
1219         pt = requested_seek_points;
1220
1221         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
1222                 q = strchr(pt, '<');
1223                 FLAC__ASSERT(0 != q);
1224                 *q++ = '\0';
1225
1226                 if(0 == strcmp(pt, "X")) { /* -S X */
1227                         if(!FLAC__metadata_object_seektable_template_append_placeholders(seek_table, 1))
1228                                 return false;
1229                 }
1230                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
1231                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
1232                                 if(!FLAC__metadata_object_seektable_template_append_spaced_points(seek_table, atoi(pt), stream_samples))
1233                                         return false;
1234                         }
1235                 }
1236                 else { /* -S # */
1237                         FLAC__uint64 n = (unsigned)atoi(pt);
1238                         if(!FLAC__metadata_object_seektable_template_append_point(seek_table, n))
1239                                 return false;
1240                 }
1241
1242                 pt = q;
1243         }
1244
1245         if(!FLAC__metadata_object_seektable_template_sort(seek_table, /*compact=*/true))
1246                 return false;
1247
1248         return true;
1249 }
1250
1251 void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps)
1252 {
1253         unsigned wide_sample, sample, channel, byte;
1254
1255         if(bps == 8) {
1256                 if(is_unsigned_samples) {
1257                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1258                                 for(channel = 0; channel < channels; channel++, sample++)
1259                                         dest[channel][wide_sample] = (FLAC__int32)ucbuffer[sample] - 0x80;
1260                 }
1261                 else {
1262                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1263                                 for(channel = 0; channel < channels; channel++, sample++)
1264                                         dest[channel][wide_sample] = (FLAC__int32)scbuffer[sample];
1265                 }
1266         }
1267         else if(bps == 16) {
1268                 if(is_big_endian != is_big_endian_host) {
1269                         unsigned char tmp;
1270                         const unsigned bytes = wide_samples * channels * (bps >> 3);
1271                         for(byte = 0; byte < bytes; byte += 2) {
1272                                 tmp = ucbuffer[byte];
1273                                 ucbuffer[byte] = ucbuffer[byte+1];
1274                                 ucbuffer[byte+1] = tmp;
1275                         }
1276                 }
1277                 if(is_unsigned_samples) {
1278                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1279                                 for(channel = 0; channel < channels; channel++, sample++)
1280                                         dest[channel][wide_sample] = (FLAC__int32)usbuffer[sample] - 0x8000;
1281                 }
1282                 else {
1283                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1284                                 for(channel = 0; channel < channels; channel++, sample++)
1285                                         dest[channel][wide_sample] = (FLAC__int32)ssbuffer[sample];
1286                 }
1287         }
1288         else if(bps == 24) {
1289                 if(!is_big_endian) {
1290                         unsigned char tmp;
1291                         const unsigned bytes = wide_samples * channels * (bps >> 3);
1292                         for(byte = 0; byte < bytes; byte += 3) {
1293                                 tmp = ucbuffer[byte];
1294                                 ucbuffer[byte] = ucbuffer[byte+2];
1295                                 ucbuffer[byte+2] = tmp;
1296                         }
1297                 }
1298                 if(is_unsigned_samples) {
1299                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1300                                 for(channel = 0; channel < channels; channel++, sample++) {
1301                                         dest[channel][wide_sample]  = ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
1302                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
1303                                         dest[channel][wide_sample] |= ucbuffer[byte++];
1304                                         dest[channel][wide_sample] -= 0x800000;
1305                                 }
1306                 }
1307                 else {
1308                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
1309                                 for(channel = 0; channel < channels; channel++, sample++) {
1310                                         dest[channel][wide_sample]  = scbuffer[byte++]; dest[channel][wide_sample] <<= 8;
1311                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
1312                                         dest[channel][wide_sample] |= ucbuffer[byte++];
1313                                 }
1314                 }
1315         }
1316         else {
1317                 FLAC__ASSERT(0);
1318         }
1319 }
1320
1321 FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
1322 {
1323         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1324         const unsigned mask = (FLAC__stream_encoder_get_do_exhaustive_model_search(encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(encoder))? 0x1f : 0x7f;
1325
1326         /* mark the current seek point if hit (if stream_offset == 0 that means we're still writing metadata and haven't hit the first frame yet) */
1327         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table->data.seek_table.num_points > 0) {
1328                 /*@@@ WATCHOUT: assumes the encoder is fixed-blocksize, which will be true indefinitely: */
1329                 const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
1330                 const FLAC__uint64 frame_first_sample = (FLAC__uint64)current_frame * (FLAC__uint64)blocksize;
1331                 const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
1332                 FLAC__uint64 test_sample;
1333                 unsigned i;
1334                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table->data.seek_table.num_points; i++) {
1335                         test_sample = encoder_wrapper->seek_table->data.seek_table.points[i].sample_number;
1336                         if(test_sample > frame_last_sample) {
1337                                 break;
1338                         }
1339                         else if(test_sample >= frame_first_sample) {
1340                                 encoder_wrapper->seek_table->data.seek_table.points[i].sample_number = frame_first_sample;
1341                                 encoder_wrapper->seek_table->data.seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
1342                                 encoder_wrapper->seek_table->data.seek_table.points[i].frame_samples = blocksize;
1343                                 encoder_wrapper->first_seek_point_to_check++;
1344                                 /* DO NOT: "break;" and here's why:
1345                                  * The seektable template may contain more than one target
1346                                  * sample for any given frame; we will keep looping, generating
1347                                  * duplicate seekpoints for them, and we'll clean it up later,
1348                                  * just before writing the seektable back to the metadata.
1349                                  */
1350                         }
1351                         else {
1352                                 encoder_wrapper->first_seek_point_to_check++;
1353                         }
1354                 }
1355         }
1356
1357         encoder_wrapper->bytes_written += bytes;
1358         encoder_wrapper->samples_written += samples;
1359         encoder_wrapper->current_frame = current_frame;
1360
1361         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
1362                 print_stats(encoder_wrapper);
1363
1364         if(fwrite(buffer, sizeof(FLAC__byte), bytes, encoder_wrapper->fout) == bytes)
1365                 return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
1366         else
1367                 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
1368 }
1369
1370 void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data)
1371 {
1372         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1373         FLAC__byte b;
1374         FILE *f = encoder_wrapper->fout;
1375         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
1376         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
1377         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
1378
1379         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
1380
1381         /*
1382          * If we are writing to an ogg stream, there is no need to go back
1383          * and update the STREAMINFO or SEEKTABLE blocks; the values we would
1384          * update are not necessary with Ogg as the transport.  We can't do
1385          * it reliably anyway without knowing the Ogg structure.
1386          */
1387 #ifdef FLAC__HAS_OGG
1388         if(encoder_wrapper->use_ogg)
1389                 return;
1390 #endif
1391
1392         /*
1393          * we get called by the encoder when the encoding process has
1394          * finished so that we can update the STREAMINFO and SEEKTABLE
1395          * blocks.
1396          */
1397
1398         (void)encoder; /* silence compiler warning about unused parameter */
1399
1400         if(f != stdout) {
1401                 fclose(encoder_wrapper->fout);
1402                 if(0 == (f = fopen(encoder_wrapper->outfilename, "r+b")))
1403                         return;
1404         }
1405
1406         /* all this is based on intimate knowledge of the stream header
1407          * layout, but a change to the header format that would break this
1408          * would also break all streams encoded in the previous format.
1409          */
1410
1411         if(-1 == fseek(f, 26, SEEK_SET)) goto end_;
1412         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
1413
1414         /* if we get this far we know we can seek so no need to check the
1415          * return value from fseek()
1416          */
1417         fseek(f, 21, SEEK_SET);
1418         if(fread(&b, 1, 1, f) != 1) goto framesize_;
1419         fseek(f, 21, SEEK_SET);
1420         b = (b & 0xf0) | (FLAC__byte)((samples >> 32) & 0x0F);
1421         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1422         b = (FLAC__byte)((samples >> 24) & 0xFF);
1423         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1424         b = (FLAC__byte)((samples >> 16) & 0xFF);
1425         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1426         b = (FLAC__byte)((samples >> 8) & 0xFF);
1427         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1428         b = (FLAC__byte)(samples & 0xFF);
1429         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1430
1431 framesize_:
1432         fseek(f, 12, SEEK_SET);
1433         b = (FLAC__byte)((min_framesize >> 16) & 0xFF);
1434         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1435         b = (FLAC__byte)((min_framesize >> 8) & 0xFF);
1436         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1437         b = (FLAC__byte)(min_framesize & 0xFF);
1438         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1439         b = (FLAC__byte)((max_framesize >> 16) & 0xFF);
1440         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1441         b = (FLAC__byte)((max_framesize >> 8) & 0xFF);
1442         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1443         b = (FLAC__byte)(max_framesize & 0xFF);
1444         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1445
1446 seektable_:
1447         if(encoder_wrapper->seek_table->data.seek_table.num_points > 0) {
1448                 long pos;
1449                 unsigned i;
1450
1451                 (void)FLAC__metadata_object_seektable_template_sort(encoder_wrapper->seek_table, /*compact=*/false);
1452
1453                 FLAC__ASSERT(FLAC__metadata_object_seektable_is_legal(encoder_wrapper->seek_table));
1454
1455                 /* convert any unused seek points to placeholders */
1456                 for(i = 0; i < encoder_wrapper->seek_table->data.seek_table.num_points; i++) {
1457                         if(encoder_wrapper->seek_table->data.seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
1458                                 break;
1459                         else if(encoder_wrapper->seek_table->data.seek_table.points[i].frame_samples == 0)
1460                                 encoder_wrapper->seek_table->data.seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
1461                 }
1462
1463                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
1464                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1465                 pos += metadata->length;
1466                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1467                 fseek(f, pos, SEEK_SET);
1468                 for(i = 0; i < encoder_wrapper->seek_table->data.seek_table.num_points; i++) {
1469                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table->data.seek_table.points[i].sample_number)) goto end_;
1470                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table->data.seek_table.points[i].stream_offset)) goto end_;
1471                         if(!write_big_endian_uint16(f, (FLAC__uint16)encoder_wrapper->seek_table->data.seek_table.points[i].frame_samples)) goto end_;
1472                 }
1473         }
1474
1475 end_:
1476         fclose(f);
1477         return;
1478 }
1479
1480 #if 0
1481 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1482 {
1483                         fprintf(stderr, "\n%s: ERROR: mismatch in decoded data, verify FAILED!\n", encoder_wrapper->inbasefilename);
1484                         fprintf(stderr, "       Please submit a bug report to\n");
1485                         fprintf(stderr, "           http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
1486                         fprintf(stderr, "       Make sure to include an email contact in the comment and/or use the\n");
1487                         fprintf(stderr, "       \"Monitor\" feature to monitor the bug status.\n");
1488
1489                         fprintf(stderr, "       Absolute sample=%u, frame=%u, channel=%u, sample=%u, expected %d, got %d\n", (unsigned)frame->header.number.sample_number + sample, (unsigned)frame->header.number.sample_number / FLAC__stream_decoder_get_blocksize(decoder), channel, sample, expect, got);
1490 }
1491 #endif
1492
1493 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
1494 {
1495 #if defined _MSC_VER || defined __MINGW32__
1496         /* with VC++ you have to spoon feed it the casting */
1497         const double progress = (double)(FLAC__int64)encoder_wrapper->samples_written / (double)(FLAC__int64)encoder_wrapper->total_samples_to_encode;
1498         const double ratio = (double)(FLAC__int64)encoder_wrapper->bytes_written / ((double)(FLAC__int64)encoder_wrapper->unencoded_size * progress);
1499 #else
1500         const double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1501         const double ratio = (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress);
1502 #endif
1503
1504         if(encoder_wrapper->samples_written == encoder_wrapper->total_samples_to_encode) {
1505                 fprintf(stderr, "\r%s:%s wrote %u bytes, ratio=%0.3f",
1506                         encoder_wrapper->inbasefilename,
1507                         encoder_wrapper->verify? (encoder_wrapper->verify_failed? " Verify FAILED!" : " Verify OK,") : "",
1508                         (unsigned)encoder_wrapper->bytes_written,
1509                         ratio
1510                 );
1511         }
1512         else {
1513                 fprintf(stderr, "\r%s: %u%% complete, ratio=%0.3f", encoder_wrapper->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
1514         }
1515 }
1516
1517 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
1518 {
1519         size_t bytes_read = fread(val, 1, 2, f);
1520
1521         if(bytes_read == 0) {
1522                 if(!eof_ok) {
1523                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1524                         return false;
1525                 }
1526                 else
1527                         return true;
1528         }
1529         else if(bytes_read < 2) {
1530                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1531                 return false;
1532         }
1533         else {
1534                 if(is_big_endian_host) {
1535                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1536                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1537                 }
1538                 return true;
1539         }
1540 }
1541
1542 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1543 {
1544         size_t bytes_read = fread(val, 1, 4, f);
1545
1546         if(bytes_read == 0) {
1547                 if(!eof_ok) {
1548                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1549                         return false;
1550                 }
1551                 else
1552                         return true;
1553         }
1554         else if(bytes_read < 4) {
1555                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1556                 return false;
1557         }
1558         else {
1559                 if(is_big_endian_host) {
1560                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1561                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1562                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1563                 }
1564                 return true;
1565         }
1566 }
1567
1568 FLAC__bool
1569 read_big_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
1570 {
1571         unsigned char buf[4];
1572         size_t bytes_read= fread(buf, 1, 2, f);
1573
1574         if(bytes_read==0U && eof_ok)
1575                 return true;
1576         else if(bytes_read<2U) {
1577                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1578                 return false;
1579         }
1580
1581         /* this is independent of host endianness */
1582         *val= (FLAC__uint16)(buf[0])<<8 | buf[1];
1583
1584         return true;
1585 }
1586
1587 FLAC__bool
1588 read_big_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1589 {
1590         unsigned char buf[4];
1591         size_t bytes_read= fread(buf, 1, 4, f);
1592
1593         if(bytes_read==0U && eof_ok)
1594                 return true;
1595         else if(bytes_read<4U) {
1596                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1597                 return false;
1598         }
1599
1600         /* this is independent of host endianness */
1601         *val= (FLAC__uint32)(buf[0])<<24 | (FLAC__uint32)(buf[1])<<16 |
1602                 (FLAC__uint32)(buf[2])<<8 | buf[3];
1603
1604         return true;
1605 }
1606
1607 FLAC__bool
1608 read_sane_extended(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1609         /* Read an IEEE 754 80-bit (aka SANE) extended floating point value from 'f',
1610          * convert it into an integral value and store in 'val'.  Return false if only
1611          * between 1 and 9 bytes remain in 'f', if 0 bytes remain in 'f' and 'eof_ok' is
1612          * false, or if the value is negative, between zero and one, or too large to be
1613          * represented by 'val'; return true otherwise.
1614          */
1615 {
1616         unsigned int i;
1617         unsigned char buf[10];
1618         size_t bytes_read= fread(buf, 1U, 10U, f);
1619         FLAC__int16 e= ((FLAC__uint16)(buf[0])<<8 | (FLAC__uint16)(buf[1]))-0x3FFF;
1620         FLAC__int16 shift= 63-e;
1621         FLAC__uint64 p= 0U;
1622
1623         if(bytes_read==0U && eof_ok)
1624                 return true;
1625         else if(bytes_read<10U) {
1626                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1627                 return false;
1628         }
1629         else if((buf[0]>>7)==1U || e<0 || e>63) {
1630                 fprintf(stderr, "%s: ERROR: invalid floating-point value\n", fn);
1631                 return false;
1632         }
1633
1634         for(i= 0U; i<8U; ++i)
1635                 p|= (FLAC__uint64)(buf[i+2])<<(56U-i*8);
1636         *val= (FLAC__uint32)(p>>shift)+(p>>(shift-1) & 0x1);
1637
1638         return true;
1639 }
1640
1641 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
1642 {
1643         if(!is_big_endian_host) {
1644                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1645                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1646         }
1647         return fwrite(&val, 1, 2, f) == 2;
1648 }
1649
1650 FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val)
1651 {
1652         if(!is_big_endian_host) {
1653                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1654                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1655                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1656                 tmp = b[2]; b[2] = b[5]; b[5] = tmp;
1657                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1658         }
1659         return fwrite(&val, 1, 8, f) == 8;
1660 }