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 <math.h> /* for floor() */
  26 #include <stdio.h> /* for FILE et al. */
  27 #include <stdlib.h> /* for malloc */
  28 #include <string.h> /* for strcmp() */
  29 #include "FLAC/all.h"
  30 #include "encode.h"
  31 #include "file.h"
  32 #ifdef FLAC__HAS_OGG
  33 #include "ogg/ogg.h"
  34 #endif
  35
  36 #ifdef min
  37 #undef min
  38 #endif
  39 #define min(x,y) ((x)<(y)?(x):(y))
  40
  41 /* this MUST be >= 588 so that sector aligning can take place with one read */
  42 #define CHUNK_OF_SAMPLES 2048
  43
  44 typedef enum {
  45         FLAC__VERIFY_OK,
  46         FLAC__VERIFY_FAILED_IN_FRAME,
  47         FLAC__VERIFY_FAILED_IN_METADATA
  48 } verify_code;
  49
  50 static const char *verify_code_string[] = {
  51         "FLAC__VERIFY_OK",
  52         "FLAC__VERIFY_FAILED_IN_FRAME",
  53         "FLAC__VERIFY_FAILED_IN_METADATA"
  54 };
  55
  56 typedef struct {
  57         FLAC__int32 *original[FLAC__MAX_CHANNELS];
  58         unsigned size; /* of each original[] in samples */
  59         unsigned tail; /* in wide samples */
  60         const FLAC__byte *encoded_signal;
  61         unsigned encoded_signal_capacity;
  62         unsigned encoded_bytes;
  63         FLAC__bool into_frames;
  64         verify_code result;
  65         FLAC__StreamDecoder *decoder;
  66 } verify_fifo_struct;
  67
  68 #ifdef FLAC__HAS_OGG
  69 typedef struct {
  70         ogg_stream_state os;
  71         ogg_page og;
  72 } ogg_info_struct;
  73 #endif
  74
  75 typedef struct {
  76         const char *inbasefilename;
  77         FILE *fout;
  78         const char *outfilename;
  79         FLAC__StreamEncoder *encoder;
  80         FLAC__bool verify;
  81         FLAC__bool verbose;
  82         FLAC__uint64 unencoded_size;
  83         FLAC__uint64 total_samples_to_encode;
  84         FLAC__uint64 bytes_written;
  85         FLAC__uint64 samples_written;
  86         FLAC__uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
  87         unsigned current_frame;
  88         verify_fifo_struct verify_fifo;
  89         FLAC__StreamMetadata_SeekTable seek_table;
  90         unsigned first_seek_point_to_check;
  91 #ifdef FLAC__HAS_OGG
  92         FLAC__bool use_ogg;
  93         ogg_info_struct ogg;
  94 #endif
  95 } encoder_wrapper_struct;
  96
  97 static FLAC__bool is_big_endian_host;
  98
  99 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE+7)/8)];
 100 static signed char *scbuffer = (signed char *)ucbuffer;
 101 static FLAC__uint16 *usbuffer = (FLAC__uint16 *)ucbuffer;
 102 static FLAC__int16 *ssbuffer = (FLAC__int16 *)ucbuffer;
 103
 104 static FLAC__int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
 105 static FLAC__int32 *input[FLAC__MAX_CHANNELS];
 106
 107 /* local routines */
 108 static FLAC__bool init(encoder_wrapper_struct *encoder_wrapper);
 109 static FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper);
 110 static FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, unsigned blocksize, FLAC__StreamMetadata_SeekTable *seek_table);
 111 static void append_point_to_seek_table(FLAC__StreamMetadata_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize);
 112 static int seekpoint_compare(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r);
 113 static void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
 114 static void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 * const input[], unsigned channels, unsigned wide_samples);
 115 static FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
 116 static void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data);
 117 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
 118 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 119 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 120 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 121 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
 122 static FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
 123 static FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
 124 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 125 static FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val);
 126
 127 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)
 128 {
 129         encoder_wrapper_struct encoder_wrapper;
 130         FLAC__bool is_unsigned_samples = false;
 131         unsigned channels = 0, bps = 0, sample_rate = 0, data_bytes;
 132         size_t bytes_per_wide_sample, bytes_read;
 133         FLAC__uint16 x;
 134         FLAC__uint32 xx;
 135         FLAC__bool got_fmt_chunk = false, got_data_chunk = false;
 136         unsigned align_remainder = 0;
 137         int info_align_carry = -1, info_align_zero = -1;
 138
 139         FLAC__ASSERT(!options.sector_align || options.common.skip == 0);
 140
 141         encoder_wrapper.encoder = 0;
 142         encoder_wrapper.verify = options.common.verify;
 143         encoder_wrapper.verbose = options.common.verbose;
 144         encoder_wrapper.bytes_written = 0;
 145         encoder_wrapper.samples_written = 0;
 146         encoder_wrapper.stream_offset = 0;
 147         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 148         encoder_wrapper.outfilename = outfilename;
 149         encoder_wrapper.seek_table.points = 0;
 150         encoder_wrapper.first_seek_point_to_check = 0;
 151 #ifdef FLAC__HAS_OGG
 152         encoder_wrapper.use_ogg = options.common.use_ogg;
 153 #endif
 154         (void)infilesize;
 155         (void)lookahead;
 156         (void)lookahead_length;
 157
 158         if(0 == strcmp(outfilename, "-")) {
 159                 encoder_wrapper.fout = file__get_binary_stdout();
 160         }
 161         else {
 162                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 163                         fprintf(stderr, "%s: ERROR: can't open output file %s\n", encoder_wrapper.inbasefilename, outfilename);
 164                         if(infile != stdin)
 165                                 fclose(infile);
 166                         return 1;
 167                 }
 168         }
 169
 170         if(!init(&encoder_wrapper))
 171                 goto wav_abort_;
 172
 173         /*
 174          * lookahead[] already has "RIFFxxxxWAVE", do sub-chunks
 175          */
 176         while(!feof(infile)) {
 177                 if(!read_little_endian_uint32(infile, &xx, true, encoder_wrapper.inbasefilename))
 178                         goto wav_abort_;
 179                 if(feof(infile))
 180                         break;
 181                 if(xx == 0x20746d66) { /* "fmt " */
 182                         if(got_fmt_chunk) {
 183                                 fprintf(stderr, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_wrapper.inbasefilename);
 184                         }
 185                         else {
 186                                 /* fmt sub-chunk size */
 187                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 188                                         goto wav_abort_;
 189                                 if(xx < 16) {
 190                                         fprintf(stderr, "%s: ERROR: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 191                                         goto wav_abort_;
 192                                 }
 193                                 else if(xx != 16 && xx != 18) {
 194                                         fprintf(stderr, "%s: WARNING: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 195                                 }
 196                                 data_bytes = xx;
 197                                 /* compression code */
 198                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 199                                         goto wav_abort_;
 200                                 if(x != 1) {
 201                                         fprintf(stderr, "%s: ERROR: unsupported compression type %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 202                                         goto wav_abort_;
 203                                 }
 204                                 /* number of channels */
 205                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 206                                         goto wav_abort_;
 207                                 if(x == 0 || x > FLAC__MAX_CHANNELS) {
 208                                         fprintf(stderr, "%s: ERROR: unsupported number channels %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 209                                         goto wav_abort_;
 210                                 }
 211                                 else if(options.sector_align && x != 2) {
 212                                         fprintf(stderr, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)x);
 213                                         goto wav_abort_;
 214                                 }
 215                                 channels = x;
 216                                 /* sample rate */
 217                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 218                                         goto wav_abort_;
 219                                 if(!FLAC__format_is_valid_sample_rate(xx)) {
 220                                         fprintf(stderr, "%s: ERROR: unsupported sample rate %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 221                                         goto wav_abort_;
 222                                 }
 223                                 else if(options.sector_align && xx != 44100) {
 224                                         fprintf(stderr, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 225                                         goto wav_abort_;
 226                                 }
 227                                 sample_rate = xx;
 228                                 /* avg bytes per second (ignored) */
 229                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 230                                         goto wav_abort_;
 231                                 /* block align (ignored) */
 232                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 233                                         goto wav_abort_;
 234                                 /* bits per sample */
 235                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 236                                         goto wav_abort_;
 237                                 if(x != 8 && x != 16 && x != 24) {
 238                                         fprintf(stderr, "%s: ERROR: unsupported bits per sample %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 239                                         goto wav_abort_;
 240                                 }
 241                                 bps = x;
 242                                 is_unsigned_samples = (x == 8);
 243
 244                                 /* skip any extra data in the fmt sub-chunk */
 245                                 data_bytes -= 16;
 246                                 if(data_bytes > 0) {
 247                                         unsigned left, need;
 248                                         for(left = data_bytes; left > 0; ) {
 249                                                 need = min(left, CHUNK_OF_SAMPLES);
 250                                                 if(fread(ucbuffer, 1, need, infile) < need) {
 251                                                         fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 252                                                         goto wav_abort_;
 253                                                 }
 254                                                 left -= need;
 255                                         }
 256                                 }
 257
 258                                 got_fmt_chunk = true;
 259                         }
 260                 }
 261                 else if(xx == 0x61746164) { /* "data" */
 262                         if(got_data_chunk) {
 263                                 fprintf(stderr, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_wrapper.inbasefilename);
 264                         }
 265                         else if(!got_fmt_chunk) {
 266                                 fprintf(stderr, "%s: ERROR: got 'data' sub-chunk before 'fmt' sub-chunk\n", encoder_wrapper.inbasefilename);
 267                                 goto wav_abort_;
 268                         }
 269                         else {
 270                                 /* data size */
 271                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 272                                         goto wav_abort_;
 273                                 data_bytes = xx;
 274
 275                                 bytes_per_wide_sample = channels * (bps >> 3);
 276
 277                                 if(options.common.skip > 0) {
 278                                         if(fseek(infile, bytes_per_wide_sample * (unsigned)options.common.skip, SEEK_CUR) < 0) {
 279                                                 /* can't seek input, read ahead manually... */
 280                                                 unsigned left, need;
 281                                                 for(left = (unsigned)options.common.skip; left > 0; ) { /*@@@ WATCHOUT: 4GB limit */
 282                                                         need = min(left, CHUNK_OF_SAMPLES);
 283                                                         if(fread(ucbuffer, bytes_per_wide_sample, need, infile) < need) {
 284                                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 285                                                                 goto wav_abort_;
 286                                                         }
 287                                                         left -= need;
 288                                                 }
 289                                         }
 290                                 }
 291
 292                                 data_bytes -= (unsigned)options.common.skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
 293                                 encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample + *options.align_reservoir_samples;
 294                                 if(options.sector_align) {
 295                                         align_remainder = (unsigned)(encoder_wrapper.total_samples_to_encode % 588);
 296                                         if(options.is_last_file)
 297                                                 encoder_wrapper.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 298                                         else
 299                                                 encoder_wrapper.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 300                                 }
 301
 302                                 /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 303                                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44;
 304
 305                                 if(!init_encoder(options.common, channels, bps, sample_rate, &encoder_wrapper))
 306                                         goto wav_abort_;
 307
 308                                 encoder_wrapper.verify_fifo.into_frames = true;
 309
 310                                 /*
 311                                  * first do any samples in the reservoir
 312                                  */
 313                                 if(options.sector_align && *options.align_reservoir_samples > 0) {
 314                                         append_to_verify_fifo(&encoder_wrapper, (const FLAC__int32 * const *)options.align_reservoir, channels, *options.align_reservoir_samples);
 315
 316                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)options.align_reservoir, *options.align_reservoir_samples)) {
 317                                                 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)]);
 318                                                 goto wav_abort_;
 319                                         }
 320                                 }
 321
 322                                 /*
 323                                  * decrement the data_bytes counter if we need to align the file
 324                                  */
 325                                 if(options.sector_align) {
 326                                         if(options.is_last_file) {
 327                                                 *options.align_reservoir_samples = 0;
 328                                         }
 329                                         else {
 330                                                 *options.align_reservoir_samples = align_remainder;
 331                                                 data_bytes -= (*options.align_reservoir_samples) * bytes_per_wide_sample;
 332                                         }
 333                                 }
 334
 335                                 /*
 336                                  * now do from the file
 337                                  */
 338                                 while(data_bytes > 0) {
 339                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
 340                                         if(bytes_read == 0) {
 341                                                 if(ferror(infile)) {
 342                                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 343                                                         goto wav_abort_;
 344                                                 }
 345                                                 else if(feof(infile)) {
 346                                                         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);
 347                                                         data_bytes = 0;
 348                                                 }
 349                                         }
 350                                         else {
 351                                                 if(bytes_read % bytes_per_wide_sample != 0) {
 352                                                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 353                                                         goto wav_abort_;
 354                                                 }
 355                                                 else {
 356                                                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 357                                                         format_input(input, wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 358
 359                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
 360                                                                 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)]);
 361                                                                 goto wav_abort_;
 362                                                         }
 363                                                         data_bytes -= bytes_read;
 364                                                 }
 365                                         }
 366                                 }
 367
 368                                 /*
 369                                  * now read unaligned samples into reservoir or pad with zeroes if necessary
 370                                  */
 371                                 if(options.sector_align) {
 372                                         if(options.is_last_file) {
 373                                                 unsigned wide_samples = 588 - align_remainder;
 374                                                 if(wide_samples < 588) {
 375                                                         unsigned channel;
 376
 377                                                         info_align_zero = wide_samples;
 378                                                         data_bytes = wide_samples * bytes_per_wide_sample;
 379                                                         for(channel = 0; channel < channels; channel++)
 380                                                                 memset(input[channel], 0, data_bytes);
 381                                                         append_to_verify_fifo(&encoder_wrapper, (const FLAC__int32 * const *)input, channels, wide_samples);
 382
 383                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
 384                                                                 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)]);
 385                                                                 goto wav_abort_;
 386                                                         }
 387                                                 }
 388                                         }
 389                                         else {
 390                                                 if(*options.align_reservoir_samples > 0) {
 391                                                         FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
 392                                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), (*options.align_reservoir_samples) * bytes_per_wide_sample, infile);
 393                                                         if(bytes_read == 0 && ferror(infile)) {
 394                                                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 395                                                                 goto wav_abort_;
 396                                                         }
 397                                                         else if(bytes_read != (*options.align_reservoir_samples) * bytes_per_wide_sample) {
 398                                                                 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);
 399                                                                 data_bytes = 0;
 400                                                         }
 401                                                         else {
 402                                                                 info_align_carry = *options.align_reservoir_samples;
 403                                                                 format_input(options.align_reservoir, *options.align_reservoir_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 404                                                         }
 405                                                 }
 406                                         }
 407                                 }
 408
 409                                 got_data_chunk = true;
 410                         }
 411                 }
 412                 else {
 413                         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));
 414                         /* sub-chunk size */
 415                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 416                                 goto wav_abort_;
 417                         if(fseek(infile, xx, SEEK_CUR) < 0) {
 418                                 /* can't seek input, read ahead manually... */
 419                                 unsigned left, need;
 420                                 const unsigned chunk = sizeof(ucbuffer);
 421                                 for(left = xx; left > 0; ) {
 422                                         need = min(left, chunk);
 423                                         if(fread(ucbuffer, 1, need, infile) < need) {
 424                                                 fprintf(stderr, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_wrapper.inbasefilename);
 425                                                 goto wav_abort_;
 426                                         }
 427                                         left -= need;
 428                                 }
 429                         }
 430                 }
 431         }
 432
 433         if(encoder_wrapper.encoder) {
 434                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 435                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 436 #ifdef FLAC__HAS_OGG
 437                 if(encoder_wrapper.use_ogg)
 438                         ogg_stream_clear(&encoder_wrapper.ogg.os);
 439 #endif
 440         }
 441         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 442                 print_stats(&encoder_wrapper);
 443                 fprintf(stderr, "\n");
 444         }
 445         if(0 != encoder_wrapper.seek_table.points)
 446                 free(encoder_wrapper.seek_table.points);
 447         if(options.common.verify) {
 448                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 449                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 450                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 451                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 452                         return 1;
 453                 }
 454         }
 455         if(info_align_carry >= 0)
 456                 fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
 457         if(info_align_zero >= 0)
 458                 fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
 459         if(infile != stdin)
 460                 fclose(infile);
 461         return 0;
 462 wav_abort_:
 463         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 464                 fprintf(stderr, "\n");
 465         if(encoder_wrapper.encoder) {
 466                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 467                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 468 #ifdef FLAC__HAS_OGG
 469                 if(encoder_wrapper.use_ogg)
 470                         ogg_stream_clear(&encoder_wrapper.ogg.os);
 471 #endif
 472         }
 473         if(0 != encoder_wrapper.seek_table.points)
 474                 free(encoder_wrapper.seek_table.points);
 475         if(options.common.verify) {
 476                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 477                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 478                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 479                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 480                         return 1;
 481                 }
 482         }
 483         if(infile != stdin)
 484                 fclose(infile);
 485         unlink(outfilename);
 486         return 1;
 487 }
 488
 489 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)
 490 {
 491         encoder_wrapper_struct encoder_wrapper;
 492         size_t bytes_read;
 493         const size_t bytes_per_wide_sample = options.channels * (options.bps >> 3);
 494
 495         encoder_wrapper.encoder = 0;
 496         encoder_wrapper.verify = options.common.verify;
 497         encoder_wrapper.verbose = options.common.verbose;
 498         encoder_wrapper.bytes_written = 0;
 499         encoder_wrapper.samples_written = 0;
 500         encoder_wrapper.stream_offset = 0;
 501         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 502         encoder_wrapper.outfilename = outfilename;
 503         encoder_wrapper.seek_table.points = 0;
 504         encoder_wrapper.first_seek_point_to_check = 0;
 505 #ifdef FLAC__HAS_OGG
 506         encoder_wrapper.use_ogg = options.common.use_ogg;
 507 #endif
 508
 509         if(0 == strcmp(outfilename, "-")) {
 510                 encoder_wrapper.fout = file__get_binary_stdout();
 511         }
 512         else {
 513                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 514                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
 515                         if(infile != stdin)
 516                                 fclose(infile);
 517                         return 1;
 518                 }
 519         }
 520
 521         if(!init(&encoder_wrapper))
 522                 goto raw_abort_;
 523
 524         /* get the file length */
 525         if(infilesize < 0) {
 526                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 527         }
 528         else {
 529                 encoder_wrapper.total_samples_to_encode = (unsigned)infilesize / bytes_per_wide_sample - options.common.skip;
 530                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample;
 531         }
 532
 533         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode <= 0)
 534                 fprintf(stderr, "(No runtime statistics possible; please wait for encoding to finish...)\n");
 535
 536         if(options.common.skip > 0) {
 537                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)options.common.skip;
 538                 if(skip_bytes > lookahead_length) {
 539                         skip_bytes -= lookahead_length;
 540                         lookahead_length = 0;
 541                         if(fseek(infile, (long)skip_bytes, SEEK_CUR) < 0) {
 542                                 /* can't seek input, read ahead manually... */
 543                                 unsigned left, need;
 544                                 const unsigned chunk = sizeof(ucbuffer);
 545                                 for(left = skip_bytes; left > 0; ) {
 546                                         need = min(left, chunk);
 547                                         if(fread(ucbuffer, 1, need, infile) < need) {
 548                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 549                                                 goto raw_abort_;
 550                                         }
 551                                         left -= need;
 552                                 }
 553                         }
 554                 }
 555                 else {
 556                         lookahead += skip_bytes;
 557                         lookahead_length -= skip_bytes;
 558                 }
 559         }
 560
 561         if(!init_encoder(options.common, options.channels, options.bps, options.sample_rate, &encoder_wrapper))
 562                 goto raw_abort_;
 563
 564         encoder_wrapper.verify_fifo.into_frames = true;
 565
 566         while(!feof(infile)) {
 567                 if(lookahead_length > 0) {
 568                         FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
 569                         memcpy(ucbuffer, lookahead, lookahead_length);
 570                         bytes_read = fread(ucbuffer+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
 571                         if(ferror(infile)) {
 572                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 573                                 goto raw_abort_;
 574                         }
 575                         lookahead_length = 0;
 576                 }
 577                 else
 578                         bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
 579
 580                 if(bytes_read == 0) {
 581                         if(ferror(infile)) {
 582                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 583                                 goto raw_abort_;
 584                         }
 585                 }
 586                 else if(bytes_read % bytes_per_wide_sample != 0) {
 587                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 588                         goto raw_abort_;
 589                 }
 590                 else {
 591                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 592                         format_input(input, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, &encoder_wrapper);
 593
 594                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, (const FLAC__int32 * const *)input, wide_samples)) {
 595                                 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)]);
 596                                 goto raw_abort_;
 597                         }
 598                 }
 599         }
 600
 601         if(encoder_wrapper.encoder) {
 602                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 603                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 604 #ifdef FLAC__HAS_OGG
 605                 if(encoder_wrapper.use_ogg)
 606                         ogg_stream_clear(&encoder_wrapper.ogg.os);
 607 #endif
 608         }
 609         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 610                 print_stats(&encoder_wrapper);
 611                 fprintf(stderr, "\n");
 612         }
 613         if(0 != encoder_wrapper.seek_table.points)
 614                 free(encoder_wrapper.seek_table.points);
 615         if(options.common.verify) {
 616                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 617                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 618                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 619                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 620                         return 1;
 621                 }
 622         }
 623         if(infile != stdin)
 624                 fclose(infile);
 625         return 0;
 626 raw_abort_:
 627         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 628                 fprintf(stderr, "\n");
 629         if(encoder_wrapper.encoder) {
 630                 FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 631                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 632 #ifdef FLAC__HAS_OGG
 633                 if(encoder_wrapper.use_ogg)
 634                         ogg_stream_clear(&encoder_wrapper.ogg.os);
 635 #endif
 636         }
 637         if(0 != encoder_wrapper.seek_table.points)
 638                 free(encoder_wrapper.seek_table.points);
 639         if(options.common.verify) {
 640                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 641                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 642                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 643                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 644                         return 1;
 645                 }
 646         }
 647         if(infile != stdin)
 648                 fclose(infile);
 649         unlink(outfilename);
 650         return 1;
 651 }
 652
 653 FLAC__bool init(encoder_wrapper_struct *encoder_wrapper)
 654 {
 655         unsigned i;
 656         FLAC__uint32 test = 1;
 657
 658         is_big_endian_host = (*((FLAC__byte*)(&test)))? false : true;
 659
 660         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 661                 input[i] = &(in[i][0]);
 662
 663         encoder_wrapper->encoder = FLAC__stream_encoder_new();
 664         if(0 == encoder_wrapper->encoder) {
 665                 fprintf(stderr, "%s: ERROR creating the encoder instance\n", encoder_wrapper->inbasefilename);
 666                 return false;
 667         }
 668
 669 #ifdef FLAC__HAS_OGG
 670         if(encoder_wrapper->use_ogg) {
 671                 if(ogg_stream_init(&encoder_wrapper->ogg.os, 0) != 0) {
 672                         fprintf(stderr, "%s: ERROR initializing the Ogg stream\n", encoder_wrapper->inbasefilename);
 673                         FLAC__stream_encoder_delete(encoder_wrapper->encoder);
 674                         return false;
 675                 }
 676         }
 677 #endif
 678
 679         return true;
 680 }
 681
 682 FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper)
 683 {
 684         unsigned i, num_metadata;
 685         FLAC__StreamMetadata seek_table, padding;
 686         FLAC__StreamMetadata *metadata[2];
 687
 688         if(channels != 2)
 689                 options.do_mid_side = options.loose_mid_side = false;
 690
 691         if(encoder_wrapper->verify) {
 692                 /* set up the fifo which will hold the original signal to compare against */
 693                 encoder_wrapper->verify_fifo.size = options.blocksize + CHUNK_OF_SAMPLES;
 694                 for(i = 0; i < channels; i++) {
 695                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder_wrapper->verify_fifo.size))) {
 696                                 fprintf(stderr, "%s: ERROR allocating verify buffers\n", encoder_wrapper->inbasefilename);
 697                                 return false;
 698                         }
 699                 }
 700                 encoder_wrapper->verify_fifo.tail = 0;
 701                 encoder_wrapper->verify_fifo.into_frames = false;
 702                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 703
 704                 /* set up a stream decoder for verification */
 705                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_new();
 706                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 707                         fprintf(stderr, "%s: ERROR creating the verify decoder instance\n", encoder_wrapper->inbasefilename);
 708                         return false;
 709                 }
 710                 FLAC__stream_decoder_set_read_callback(encoder_wrapper->verify_fifo.decoder, verify_read_callback);
 711                 FLAC__stream_decoder_set_write_callback(encoder_wrapper->verify_fifo.decoder, verify_write_callback);
 712                 FLAC__stream_decoder_set_metadata_callback(encoder_wrapper->verify_fifo.decoder, verify_metadata_callback);
 713                 FLAC__stream_decoder_set_error_callback(encoder_wrapper->verify_fifo.decoder, verify_error_callback);
 714                 FLAC__stream_decoder_set_client_data(encoder_wrapper->verify_fifo.decoder, encoder_wrapper);
 715                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
 716                         fprintf(stderr, "%s: ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->inbasefilename, FLAC__stream_decoder_get_state(encoder_wrapper->verify_fifo.decoder), FLAC__StreamDecoderStateString[FLAC__stream_decoder_get_state(encoder_wrapper->verify_fifo.decoder)]);
 717                         return false;
 718                 }
 719         }
 720
 721         if(!convert_to_seek_table(options.requested_seek_points, options.num_requested_seek_points, encoder_wrapper->total_samples_to_encode, options.blocksize, &encoder_wrapper->seek_table)) {
 722                 fprintf(stderr, "%s: ERROR allocating seek table\n", encoder_wrapper->inbasefilename);
 723                 return false;
 724         }
 725
 726         num_metadata = 0;
 727         if(encoder_wrapper->seek_table.num_points > 0) {
 728                 seek_table.is_last = false; /* the encoder will set this for us */
 729                 seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
 730                 seek_table.length = encoder_wrapper->seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
 731                 seek_table.data.seek_table = encoder_wrapper->seek_table;
 732                 metadata[num_metadata++] = &seek_table;
 733         }
 734         if(options.padding > 0) {
 735                 padding.is_last = false; /* the encoder will set this for us */
 736                 padding.type = FLAC__METADATA_TYPE_PADDING;
 737                 padding.length = (unsigned)options.padding;
 738                 metadata[num_metadata++] = &padding;
 739         }
 740
 741         FLAC__stream_encoder_set_streamable_subset(encoder_wrapper->encoder, !options.lax);
 742         FLAC__stream_encoder_set_do_mid_side_stereo(encoder_wrapper->encoder, options.do_mid_side);
 743         FLAC__stream_encoder_set_loose_mid_side_stereo(encoder_wrapper->encoder, options.loose_mid_side);
 744         FLAC__stream_encoder_set_channels(encoder_wrapper->encoder, channels);
 745         FLAC__stream_encoder_set_bits_per_sample(encoder_wrapper->encoder, bps);
 746         FLAC__stream_encoder_set_sample_rate(encoder_wrapper->encoder, sample_rate);
 747         FLAC__stream_encoder_set_blocksize(encoder_wrapper->encoder, options.blocksize);
 748         FLAC__stream_encoder_set_max_lpc_order(encoder_wrapper->encoder, options.max_lpc_order);
 749         FLAC__stream_encoder_set_qlp_coeff_precision(encoder_wrapper->encoder, options.qlp_coeff_precision);
 750         FLAC__stream_encoder_set_do_qlp_coeff_prec_search(encoder_wrapper->encoder, options.do_qlp_coeff_prec_search);
 751         FLAC__stream_encoder_set_do_escape_coding(encoder_wrapper->encoder, options.do_escape_coding);
 752         FLAC__stream_encoder_set_do_exhaustive_model_search(encoder_wrapper->encoder, options.do_exhaustive_model_search);
 753         FLAC__stream_encoder_set_min_residual_partition_order(encoder_wrapper->encoder, options.min_residual_partition_order);
 754         FLAC__stream_encoder_set_max_residual_partition_order(encoder_wrapper->encoder, options.max_residual_partition_order);
 755         FLAC__stream_encoder_set_rice_parameter_search_dist(encoder_wrapper->encoder, options.rice_parameter_search_dist);
 756         FLAC__stream_encoder_set_total_samples_estimate(encoder_wrapper->encoder, encoder_wrapper->total_samples_to_encode);
 757         FLAC__stream_encoder_set_metadata(encoder_wrapper->encoder, (num_metadata > 0)? metadata : 0, num_metadata);
 758         FLAC__stream_encoder_set_write_callback(encoder_wrapper->encoder, write_callback);
 759         FLAC__stream_encoder_set_metadata_callback(encoder_wrapper->encoder, metadata_callback);
 760         FLAC__stream_encoder_set_client_data(encoder_wrapper->encoder, encoder_wrapper);
 761
 762         if(FLAC__stream_encoder_init(encoder_wrapper->encoder) != FLAC__STREAM_ENCODER_OK) {
 763                 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)]);
 764                 return false;
 765         }
 766
 767         /* the above call writes all the metadata, so we save the stream offset now */
 768         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
 769
 770         return true;
 771 }
 772
 773 FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, unsigned blocksize, FLAC__StreamMetadata_SeekTable *seek_table)
 774 {
 775         unsigned i, j, real_points, placeholders;
 776         char *pt = requested_seek_points, *q;
 777         FLAC__bool first;
 778
 779         seek_table->num_points = 0;
 780
 781         if(num_requested_seek_points == 0)
 782                 return true;
 783
 784         if(num_requested_seek_points < 0) {
 785                 strcpy(requested_seek_points, "100x<");
 786                 num_requested_seek_points = 1;
 787         }
 788
 789         /* first count how many individual seek point we may need */
 790         real_points = placeholders = 0;
 791         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 792                 q = strchr(pt, '<');
 793                 FLAC__ASSERT(0 != q);
 794                 *q = '\0';
 795
 796                 if(0 == strcmp(pt, "X")) { /* -S X */
 797                         placeholders++;
 798                 }
 799                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 800                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
 801                                 real_points += (unsigned)atoi(pt);
 802                 }
 803                 else { /* -S # */
 804                         real_points++;
 805                 }
 806                 *q++ = '<';
 807
 808                 pt = q;
 809         }
 810         pt = requested_seek_points;
 811
 812         /* make some space */
 813         if(0 == (seek_table->points = (FLAC__StreamMetadata_SeekPoint*)malloc(sizeof(FLAC__StreamMetadata_SeekPoint) * (real_points+placeholders))))
 814                 return false;
 815
 816         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
 817         for(i = 0; i < real_points+placeholders; i++) {
 818                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 819                 seek_table->points[i].stream_offset = 0;
 820                 seek_table->points[i].frame_samples = 0;
 821         }
 822
 823         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 824                 q = strchr(pt, '<');
 825                 FLAC__ASSERT(0 != q);
 826                 *q++ = '\0';
 827
 828                 if(0 == strcmp(pt, "X")) { /* -S X */
 829                         ; /* we append placeholders later */
 830                 }
 831                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 832                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
 833                                 unsigned j, n;
 834                                 n = (unsigned)atoi(pt);
 835                                 for(j = 0; j < n; j++)
 836                                         append_point_to_seek_table(seek_table, stream_samples * (FLAC__uint64)j / (FLAC__uint64)n, stream_samples, blocksize);
 837                         }
 838                 }
 839                 else { /* -S # */
 840                         append_point_to_seek_table(seek_table, (FLAC__uint64)atoi(pt), stream_samples, blocksize);
 841                 }
 842
 843                 pt = q;
 844         }
 845
 846         /* sort the seekpoints */
 847         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetadata_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
 848
 849         /* uniqify the seekpoints */
 850         first = true;
 851         for(i = j = 0; i < seek_table->num_points; i++) {
 852                 if(!first) {
 853                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
 854                                 continue;
 855                 }
 856                 first = false;
 857                 seek_table->points[j++] = seek_table->points[i];
 858         }
 859         seek_table->num_points = j;
 860
 861         /* append placeholders */
 862         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
 863                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 864         seek_table->num_points += placeholders;
 865
 866         return true;
 867 }
 868
 869 void append_point_to_seek_table(FLAC__StreamMetadata_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize)
 870 {
 871         const FLAC__uint64 target_sample = (sample / blocksize) * blocksize;
 872
 873         if(stream_samples == 0 || target_sample < stream_samples)
 874                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
 875 }
 876
 877 int seekpoint_compare(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r)
 878 {
 879         /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */
 880         if(l->sample_number == r->sample_number)
 881                 return 0;
 882         else if(l->sample_number < r->sample_number)
 883                 return -1;
 884         else
 885                 return 1;
 886 }
 887
 888 void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 889 {
 890         unsigned wide_sample, sample, channel, byte;
 891
 892         if(bps == 8) {
 893                 if(is_unsigned_samples) {
 894                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 895                                 for(channel = 0; channel < channels; channel++, sample++)
 896                                         dest[channel][wide_sample] = (FLAC__int32)ucbuffer[sample] - 0x80;
 897                 }
 898                 else {
 899                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 900                                 for(channel = 0; channel < channels; channel++, sample++)
 901                                         dest[channel][wide_sample] = (FLAC__int32)scbuffer[sample];
 902                 }
 903         }
 904         else if(bps == 16) {
 905                 if(is_big_endian != is_big_endian_host) {
 906                         unsigned char tmp;
 907                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 908                         for(byte = 0; byte < bytes; byte += 2) {
 909                                 tmp = ucbuffer[byte];
 910                                 ucbuffer[byte] = ucbuffer[byte+1];
 911                                 ucbuffer[byte+1] = tmp;
 912                         }
 913                 }
 914                 if(is_unsigned_samples) {
 915                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 916                                 for(channel = 0; channel < channels; channel++, sample++)
 917                                         dest[channel][wide_sample] = (FLAC__int32)usbuffer[sample] - 0x8000;
 918                 }
 919                 else {
 920                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 921                                 for(channel = 0; channel < channels; channel++, sample++)
 922                                         dest[channel][wide_sample] = (FLAC__int32)ssbuffer[sample];
 923                 }
 924         }
 925         else if(bps == 24) {
 926                 if(!is_big_endian) {
 927                         unsigned char tmp;
 928                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 929                         for(byte = 0; byte < bytes; byte += 3) {
 930                                 tmp = ucbuffer[byte];
 931                                 ucbuffer[byte] = ucbuffer[byte+2];
 932                                 ucbuffer[byte+2] = tmp;
 933                         }
 934                 }
 935                 if(is_unsigned_samples) {
 936                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 937                                 for(channel = 0; channel < channels; channel++, sample++) {
 938                                         dest[channel][wide_sample]  = ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 939                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 940                                         dest[channel][wide_sample] |= ucbuffer[byte++];
 941                                         dest[channel][wide_sample] -= 0x800000;
 942                                 }
 943                 }
 944                 else {
 945                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 946                                 for(channel = 0; channel < channels; channel++, sample++) {
 947                                         dest[channel][wide_sample]  = scbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 948                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 949                                         dest[channel][wide_sample] |= ucbuffer[byte++];
 950                                 }
 951                 }
 952         }
 953         else {
 954                 FLAC__ASSERT(0);
 955         }
 956
 957         append_to_verify_fifo(encoder_wrapper, (const FLAC__int32 * const *)dest, channels, wide_samples);
 958 }
 959
 960 void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 * const input[], unsigned channels, unsigned wide_samples)
 961 {
 962         if(encoder_wrapper->verify) {
 963                 unsigned channel;
 964                 for(channel = 0; channel < channels; channel++)
 965                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], input[channel], sizeof(FLAC__int32) * wide_samples);
 966                 encoder_wrapper->verify_fifo.tail += wide_samples;
 967                 FLAC__ASSERT(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 968         }
 969 }
 970
 971 FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 972 {
 973         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 974         const unsigned mask = (FLAC__stream_encoder_get_do_exhaustive_model_search(encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(encoder))? 0x1f : 0x7f;
 975
 976         /* 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) */
 977         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
 978                 FLAC__uint64 current_sample = (FLAC__uint64)current_frame * (FLAC__uint64)FLAC__stream_encoder_get_blocksize(encoder), test_sample;
 979                 unsigned i;
 980                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
 981                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
 982                         if(test_sample > current_sample) {
 983                                 break;
 984                         }
 985                         else if(test_sample == current_sample) {
 986                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
 987                                 encoder_wrapper->seek_table.points[i].frame_samples = FLAC__stream_encoder_get_blocksize(encoder);
 988                                 encoder_wrapper->first_seek_point_to_check++;
 989                                 break;
 990                         }
 991                         else {
 992                                 encoder_wrapper->first_seek_point_to_check++;
 993                         }
 994                 }
 995         }
 996
 997         encoder_wrapper->bytes_written += bytes;
 998         encoder_wrapper->samples_written += samples;
 999         encoder_wrapper->current_frame = current_frame;
1000
1001         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
1002                 print_stats(encoder_wrapper);
1003
1004         if(encoder_wrapper->verify) {
1005                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
1006                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
1007                 if(encoder_wrapper->verify_fifo.into_frames) {
1008                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
1009                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
1010                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1011                         }
1012                 }
1013                 else {
1014                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
1015                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
1016                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1017                         }
1018                 }
1019         }
1020
1021 #ifdef FLAC__HAS_OGG
1022         if(encoder_wrapper->use_ogg) {
1023                 ogg_packet op;
1024
1025                 memset(&op, 0, sizeof(op));
1026                 op.packet = (unsigned char *)buffer;
1027                 op.granulepos = encoder_wrapper->samples_written - 1;
1028                 /*@@@ WATCHOUT:
1029                  * this depends on the behavior of libFLAC that we will get one
1030                  * write_callback first with all the metadata (and 'samples'
1031                  * will be 0), then one write_callback for each frame.
1032                  */
1033                 op.packetno = (samples == 0? -1 : (int)encoder_wrapper->current_frame);
1034                 op.bytes = bytes;
1035
1036                 if (encoder_wrapper->bytes_written == bytes)
1037                         op.b_o_s = 1;
1038
1039                 if (encoder_wrapper->total_samples_to_encode == encoder_wrapper->samples_written)
1040                         op.e_o_s = 1;
1041
1042                 ogg_stream_packetin(&encoder_wrapper->ogg.os, &op);
1043
1044                 while(ogg_stream_pageout(&encoder_wrapper->ogg.os, &encoder_wrapper->ogg.og) != 0) {
1045                         int written;
1046                         written = fwrite(encoder_wrapper->ogg.og.header, 1, encoder_wrapper->ogg.og.header_len, encoder_wrapper->fout);
1047                         if (written != encoder_wrapper->ogg.og.header_len)
1048                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1049
1050                         written = fwrite(encoder_wrapper->ogg.og.body, 1, encoder_wrapper->ogg.og.body_len, encoder_wrapper->fout);
1051                         if (written != encoder_wrapper->ogg.og.body_len)
1052                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1053                 }
1054
1055                 return FLAC__STREAM_ENCODER_WRITE_OK;
1056         }
1057         else
1058 #endif
1059         {
1060                 if(fwrite(buffer, sizeof(FLAC__byte), bytes, encoder_wrapper->fout) == bytes)
1061                         return FLAC__STREAM_ENCODER_WRITE_OK;
1062                 else
1063                         return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1064         }
1065 }
1066
1067 void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data)
1068 {
1069         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1070         FLAC__byte b;
1071         FILE *f = encoder_wrapper->fout;
1072         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
1073         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
1074         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
1075
1076         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
1077
1078         /*
1079          * If we are writing to an ogg stream, there is no need to go back
1080          * and update the STREAMINFO or SEEKTABLE blocks; the values we would
1081          * update are not necessary with Ogg as the transport.  We can't do
1082          * it reliably anyway without knowing the Ogg structure.
1083          */
1084 #ifdef FLAC__HAS_OGG
1085         if(encoder_wrapper->use_ogg)
1086                 return;
1087 #endif
1088
1089         /*
1090          * we get called by the encoder when the encoding process has
1091          * finished so that we can update the STREAMINFO and SEEKTABLE
1092          * blocks.
1093          */
1094
1095         (void)encoder; /* silence compiler warning about unused parameter */
1096
1097         if(f != stdout) {
1098                 fclose(encoder_wrapper->fout);
1099                 if(0 == (f = fopen(encoder_wrapper->outfilename, "r+b")))
1100                         return;
1101         }
1102
1103         /* all this is based on intimate knowledge of the stream header
1104          * layout, but a change to the header format that would break this
1105          * would also break all streams encoded in the previous format.
1106          */
1107
1108         if(-1 == fseek(f, 26, SEEK_SET)) goto end_;
1109         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
1110
1111 samples_:
1112         /* if we get this far we know we can seek so no need to check the
1113          * return value from fseek()
1114          */
1115         fseek(f, 21, SEEK_SET);
1116         if(fread(&b, 1, 1, f) != 1) goto framesize_;
1117         fseek(f, 21, SEEK_SET);
1118         b = (b & 0xf0) | (FLAC__byte)((samples >> 32) & 0x0F);
1119         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1120         b = (FLAC__byte)((samples >> 24) & 0xFF);
1121         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1122         b = (FLAC__byte)((samples >> 16) & 0xFF);
1123         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1124         b = (FLAC__byte)((samples >> 8) & 0xFF);
1125         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1126         b = (FLAC__byte)(samples & 0xFF);
1127         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1128
1129 framesize_:
1130         fseek(f, 12, SEEK_SET);
1131         b = (FLAC__byte)((min_framesize >> 16) & 0xFF);
1132         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1133         b = (FLAC__byte)((min_framesize >> 8) & 0xFF);
1134         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1135         b = (FLAC__byte)(min_framesize & 0xFF);
1136         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1137         b = (FLAC__byte)((max_framesize >> 16) & 0xFF);
1138         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1139         b = (FLAC__byte)((max_framesize >> 8) & 0xFF);
1140         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1141         b = (FLAC__byte)(max_framesize & 0xFF);
1142         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1143
1144 seektable_:
1145         if(encoder_wrapper->seek_table.num_points > 0) {
1146                 long pos;
1147                 unsigned i;
1148
1149                 /* convert any unused seek points to placeholders */
1150                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1151                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
1152                                 break;
1153                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
1154                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
1155                 }
1156
1157                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
1158                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1159                 pos += metadata->length;
1160                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1161                 fseek(f, pos, SEEK_SET);
1162                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1163                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
1164                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
1165                         if(!write_big_endian_uint16(f, (FLAC__uint16)encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
1166                 }
1167         }
1168
1169 end_:
1170         fclose(f);
1171         return;
1172 }
1173
1174 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
1175 {
1176         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1177         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
1178         (void)decoder;
1179
1180         if(encoded_bytes <= *bytes) {
1181                 *bytes = encoded_bytes;
1182                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1183         }
1184         else {
1185                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1186                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
1187                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
1188         }
1189
1190         return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
1191 }
1192
1193 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
1194 {
1195         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1196         unsigned channel, l, r;
1197         const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
1198         const unsigned bytes_per_block = sizeof(FLAC__int32) * FLAC__stream_decoder_get_blocksize(decoder);
1199
1200         for(channel = 0; channel < channels; channel++) {
1201                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], bytes_per_block)) {
1202                         unsigned sample = 0;
1203                         int expect = 0, got = 0;
1204                         fprintf(stderr, "\n%s: ERROR: mismatch in decoded data, verify FAILED!\n", encoder_wrapper->inbasefilename);
1205                         fprintf(stderr, "       Please submit a bug report to\n");
1206                         fprintf(stderr, "           http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
1207                         fprintf(stderr, "       Make sure to include an email contact in the comment and/or use the\n");
1208                         fprintf(stderr, "       \"Monitor\" feature to monitor the bug status.\n");
1209                         for(l = 0, r = FLAC__stream_decoder_get_blocksize(decoder); l < r; l++) {
1210                                 if(buffer[channel][l] != encoder_wrapper->verify_fifo.original[channel][l]) {
1211                                         sample = l;
1212                                         expect = (int)encoder_wrapper->verify_fifo.original[channel][l];
1213                                         got = (int)buffer[channel][l];
1214                                         break;
1215                                 }
1216                         }
1217                         FLAC__ASSERT(l < r);
1218                         FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
1219                         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); /*@@@ WATCHOUT: 4GB limit */
1220                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
1221                 }
1222         }
1223         /* dequeue the frame from the fifo */
1224         for(channel = 0; channel < channels; channel++) {
1225                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
1226                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
1227                 }
1228         }
1229         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
1230         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
1231 }
1232
1233 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
1234 {
1235         (void)decoder;
1236         (void)metadata;
1237         (void)client_data;
1238 }
1239
1240 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1241 {
1242         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1243         (void)decoder;
1244         fprintf(stderr, "\n%s: ERROR: verification decoder returned error %d:%s\n", encoder_wrapper->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1245 }
1246
1247 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
1248 {
1249 #if defined _MSC_VER || defined __MINGW32__
1250         /* with VC++ you have to spoon feed it the casting */
1251         const double progress = (double)(FLAC__int64)encoder_wrapper->samples_written / (double)(FLAC__int64)encoder_wrapper->total_samples_to_encode;
1252         const double ratio = (double)(FLAC__int64)encoder_wrapper->bytes_written / ((double)(FLAC__int64)encoder_wrapper->unencoded_size * progress);
1253 #else
1254         const double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1255         const double ratio = (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress);
1256 #endif
1257
1258         if(encoder_wrapper->samples_written == encoder_wrapper->total_samples_to_encode) {
1259                 fprintf(stderr, "\r%s:%s wrote %u bytes, ratio=%0.3f",
1260                         encoder_wrapper->inbasefilename,
1261                         encoder_wrapper->verify? (encoder_wrapper->verify_fifo.result == FLAC__VERIFY_OK? " Verify OK," : " Verify FAILED!") : "",
1262                         (unsigned)encoder_wrapper->bytes_written,
1263                         ratio
1264                 );
1265         }
1266         else {
1267                 fprintf(stderr, "\r%s: %u%% complete, ratio=%0.3f", encoder_wrapper->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
1268         }
1269 }
1270
1271 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
1272 {
1273         size_t bytes_read = fread(val, 1, 2, f);
1274
1275         if(bytes_read == 0) {
1276                 if(!eof_ok) {
1277                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1278                         return false;
1279                 }
1280                 else
1281                         return true;
1282         }
1283         else if(bytes_read < 2) {
1284                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1285                 return false;
1286         }
1287         else {
1288                 if(is_big_endian_host) {
1289                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1290                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1291                 }
1292                 return true;
1293         }
1294 }
1295
1296 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1297 {
1298         size_t bytes_read = fread(val, 1, 4, f);
1299
1300         if(bytes_read == 0) {
1301                 if(!eof_ok) {
1302                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1303                         return false;
1304                 }
1305                 else
1306                         return true;
1307         }
1308         else if(bytes_read < 4) {
1309                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1310                 return false;
1311         }
1312         else {
1313                 if(is_big_endian_host) {
1314                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1315                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1316                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1317                 }
1318                 return true;
1319         }
1320 }
1321
1322 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
1323 {
1324         if(!is_big_endian_host) {
1325                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1326                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1327         }
1328         return fwrite(&val, 1, 2, f) == 2;
1329 }
1330
1331 FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val)
1332 {
1333         if(!is_big_endian_host) {
1334                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1335                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1336                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1337                 tmp = b[2]; b[2] = b[5]; b[5] = tmp;
1338                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1339         }
1340         return fwrite(&val, 1, 8, f) == 8;
1341 }