src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001  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
  33 #ifdef min
  34 #undef min
  35 #endif
  36 #define min(x,y) ((x)<(y)?(x):(y))
  37
  38 /* this MUST be >= 588 so that sector aligning can take place with one read */
  39 #define CHUNK_OF_SAMPLES 2048
  40
  41 typedef enum {
  42         FLAC__VERIFY_OK,
  43         FLAC__VERIFY_FAILED_IN_FRAME,
  44         FLAC__VERIFY_FAILED_IN_METADATA
  45 } verify_code;
  46
  47 static const char *verify_code_string[] = {
  48         "FLAC__VERIFY_OK",
  49         "FLAC__VERIFY_FAILED_IN_FRAME",
  50         "FLAC__VERIFY_FAILED_IN_METADATA"
  51 };
  52
  53 typedef struct {
  54         FLAC__int32 *original[FLAC__MAX_CHANNELS];
  55         unsigned size; /* of each original[] in samples */
  56         unsigned tail; /* in wide samples */
  57         const FLAC__byte *encoded_signal;
  58         unsigned encoded_signal_capacity;
  59         unsigned encoded_bytes;
  60         FLAC__bool into_frames;
  61         verify_code result;
  62         FLAC__StreamDecoder *decoder;
  63 } verify_fifo_struct;
  64
  65 typedef struct {
  66         const char *inbasefilename;
  67         FILE *fout;
  68         const char *outfilename;
  69         FLAC__StreamEncoder *encoder;
  70         FLAC__bool verify;
  71         FLAC__bool verbose;
  72         FLAC__uint64 unencoded_size;
  73         FLAC__uint64 total_samples_to_encode;
  74         FLAC__uint64 bytes_written;
  75         FLAC__uint64 samples_written;
  76         FLAC__uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
  77         unsigned current_frame;
  78         verify_fifo_struct verify_fifo;
  79         FLAC__StreamMetaData_SeekTable seek_table;
  80         unsigned first_seek_point_to_check;
  81 } encoder_wrapper_struct;
  82
  83 static FLAC__bool is_big_endian_host;
  84
  85 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
  86 static signed char *scbuffer = (signed char *)ucbuffer;
  87 static FLAC__uint16 *usbuffer = (FLAC__uint16 *)ucbuffer;
  88 static FLAC__int16 *ssbuffer = (FLAC__int16 *)ucbuffer;
  89
  90 static FLAC__int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  91 static FLAC__int32 *input[FLAC__MAX_CHANNELS];
  92
  93 /* local routines */
  94 static FLAC__bool init(encoder_wrapper_struct *encoder_wrapper);
  95 static FLAC__bool init_encoder(FLAC__bool lax, FLAC__bool do_mid_side, FLAC__bool loose_mid_side, FLAC__bool do_exhaustive_model_search, FLAC__bool do_escape_coding, FLAC__bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper);
  96 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);
  97 static void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize);
  98 static int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r);
  99 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);
 100 static void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 *input[], unsigned channels, unsigned wide_samples);
 101 static FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
 102 static void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
 103 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
 104 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data);
 105 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
 106 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 107 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
 108 static FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
 109 static FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
 110 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
 111 static FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val);
 112
 113 int flac__encode_wav(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, FLAC__int32 *align_reservoir[], unsigned *align_reservoir_samples, FLAC__bool sector_align, FLAC__bool is_last_file, FLAC__bool verbose, FLAC__uint64 skip, FLAC__bool verify, FLAC__bool lax, FLAC__bool do_mid_side, FLAC__bool loose_mid_side, FLAC__bool do_exhaustive_model_search, FLAC__bool do_escape_coding, FLAC__bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points)
 114 {
 115         encoder_wrapper_struct encoder_wrapper;
 116         FLAC__bool is_unsigned_samples = false;
 117         unsigned channels = 0, bps = 0, sample_rate = 0, data_bytes;
 118         size_t bytes_per_wide_sample, bytes_read;
 119         FLAC__uint16 x;
 120         FLAC__uint32 xx;
 121         FLAC__bool got_fmt_chunk = false, got_data_chunk = false;
 122         unsigned align_remainder = 0;
 123         int info_align_carry = -1, info_align_zero = -1;
 124
 125         FLAC__ASSERT(!sector_align || skip == 0);
 126
 127         encoder_wrapper.encoder = 0;
 128         encoder_wrapper.verify = verify;
 129         encoder_wrapper.verbose = verbose;
 130         encoder_wrapper.bytes_written = 0;
 131         encoder_wrapper.samples_written = 0;
 132         encoder_wrapper.stream_offset = 0;
 133         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 134         encoder_wrapper.outfilename = outfilename;
 135         encoder_wrapper.seek_table.points = 0;
 136         encoder_wrapper.first_seek_point_to_check = 0;
 137         (void)infilesize;
 138         (void)lookahead;
 139         (void)lookahead_length;
 140
 141         if(0 == strcmp(outfilename, "-")) {
 142                 encoder_wrapper.fout = stdout;
 143         }
 144         else {
 145                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 146                         fprintf(stderr, "%s: ERROR: can't open output file %s\n", encoder_wrapper.inbasefilename, outfilename);
 147                         fclose(infile);
 148                         return 1;
 149                 }
 150         }
 151
 152         if(!init(&encoder_wrapper))
 153                 goto wav_abort_;
 154
 155         /*
 156          * lookahead[] already has "RIFFxxxxWAVE", do sub-chunks
 157          */
 158         while(!feof(infile)) {
 159                 if(!read_little_endian_uint32(infile, &xx, true, encoder_wrapper.inbasefilename))
 160                         goto wav_abort_;
 161                 if(feof(infile))
 162                         break;
 163                 if(xx == 0x20746d66) { /* "fmt " */
 164                         if(got_fmt_chunk) {
 165                                 fprintf(stderr, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_wrapper.inbasefilename);
 166                         }
 167                         else {
 168                                 /* fmt sub-chunk size */
 169                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 170                                         goto wav_abort_;
 171                                 if(xx < 16) {
 172                                         fprintf(stderr, "%s: ERROR: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 173                                         goto wav_abort_;
 174                                 }
 175                                 else if(xx != 16 && xx != 18) {
 176                                         fprintf(stderr, "%s: WARNING: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 177                                 }
 178                                 data_bytes = xx;
 179                                 /* compression code */
 180                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 181                                         goto wav_abort_;
 182                                 if(x != 1) {
 183                                         fprintf(stderr, "%s: ERROR: unsupported compression type %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 184                                         goto wav_abort_;
 185                                 }
 186                                 /* number of channels */
 187                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 188                                         goto wav_abort_;
 189                                 if(x == 0 || x > FLAC__MAX_CHANNELS) {
 190                                         fprintf(stderr, "%s: ERROR: unsupported number channels %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 191                                         goto wav_abort_;
 192                                 }
 193                                 else if(sector_align && x != 2) {
 194                                         fprintf(stderr, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)x);
 195                                         goto wav_abort_;
 196                                 }
 197                                 channels = x;
 198                                 /* sample rate */
 199                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 200                                         goto wav_abort_;
 201                                 if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 202                                         fprintf(stderr, "%s: ERROR: unsupported sample rate %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 203                                         goto wav_abort_;
 204                                 }
 205                                 else if(sector_align && xx != 44100) {
 206                                         fprintf(stderr, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)xx);
 207                                         goto wav_abort_;
 208                                 }
 209                                 sample_rate = xx;
 210                                 /* avg bytes per second (ignored) */
 211                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 212                                         goto wav_abort_;
 213                                 /* block align (ignored) */
 214                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 215                                         goto wav_abort_;
 216                                 /* bits per sample */
 217                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
 218                                         goto wav_abort_;
 219                                 if(x != 8 && x != 16) {
 220                                         fprintf(stderr, "%s: ERROR: unsupported bits per sample %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
 221                                         goto wav_abort_;
 222                                 }
 223                                 bps = x;
 224                                 is_unsigned_samples = (x == 8);
 225
 226                                 bytes_per_wide_sample = channels * (bps >> 3);
 227
 228                                 /* skip any extra data in the fmt sub-chunk */
 229                                 data_bytes -= 16;
 230                                 if(data_bytes > 0) {
 231                                         unsigned left, need;
 232                                         for(left = data_bytes; left > 0; ) { /*@@@ WATCHOUT: 4GB limit */
 233                                                 need = min(left, CHUNK_OF_SAMPLES);
 234                                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, infile) < need) {
 235                                                         fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 236                                                         goto wav_abort_;
 237                                                 }
 238                                                 left -= need;
 239                                         }
 240                                 }
 241
 242                                 got_fmt_chunk = true;
 243                         }
 244                 }
 245                 else if(xx == 0x61746164) { /* "data" */
 246                         if(got_data_chunk) {
 247                                 fprintf(stderr, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_wrapper.inbasefilename);
 248                         }
 249                         else if(!got_fmt_chunk) {
 250                                 fprintf(stderr, "%s: ERROR: got data sub-chunk before fmt sub-chunk\n", encoder_wrapper.inbasefilename);
 251                                 goto wav_abort_;
 252                         }
 253                         else {
 254                                 /* data size */
 255                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 256                                         goto wav_abort_;
 257                                 data_bytes = xx;
 258
 259                                 bytes_per_wide_sample = channels * (bps >> 3);
 260
 261                                 if(skip > 0) {
 262                                         if(infile != stdin) {
 263                                                 if(-1 == fseek(infile, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 264                                                         fprintf(stderr, "%s: ERROR during seek while skipping samples\n", encoder_wrapper.inbasefilename);
 265                                                         goto wav_abort_;
 266                                                 }
 267                                         }
 268                                         else {
 269                                                 unsigned left, need;
 270                                                 for(left = (unsigned)skip; left > 0; ) { /*@@@ WATCHOUT: 4GB limit */
 271                                                         need = min(left, CHUNK_OF_SAMPLES);
 272                                                         if(fread(ucbuffer, 1, bytes_per_wide_sample * need, infile) < need) {
 273                                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 274                                                                 goto wav_abort_;
 275                                                         }
 276                                                         left -= need;
 277                                                 }
 278                                         }
 279                                 }
 280
 281                                 data_bytes -= (unsigned)skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
 282                                 encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample + *align_reservoir_samples;
 283                                 if(sector_align) {
 284                                         align_remainder = (unsigned)(encoder_wrapper.total_samples_to_encode % 588);
 285                                         if(is_last_file)
 286                                                 encoder_wrapper.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 287                                         else
 288                                                 encoder_wrapper.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 289                                 }
 290
 291                                 /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 292                                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44;
 293
 294                                 if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_escape_coding, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 295                                         goto wav_abort_;
 296
 297                                 encoder_wrapper.verify_fifo.into_frames = true;
 298
 299                                 /*
 300                                  * first do any samples in the reservoir
 301                                  */
 302                                 if(sector_align && *align_reservoir_samples > 0) {
 303                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 304                                         append_to_verify_fifo(&encoder_wrapper, align_reservoir, channels, *align_reservoir_samples);
 305
 306                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 307                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, align_reservoir, *align_reservoir_samples)) {
 308                                                 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)]);
 309                                                 goto wav_abort_;
 310                                         }
 311                                 }
 312
 313                                 /*
 314                                  * decrement the data_bytes counter if we need to align the file
 315                                  */
 316                                 if(sector_align) {
 317                                         if(is_last_file) {
 318                                                 *align_reservoir_samples = 0;
 319                                         }
 320                                         else {
 321                                                 *align_reservoir_samples = align_remainder;
 322                                                 data_bytes -= (*align_reservoir_samples) * bytes_per_wide_sample;
 323                                         }
 324                                 }
 325
 326                                 /*
 327                                  * now do from the file
 328                                  */
 329                                 while(data_bytes > 0) {
 330                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
 331                                         if(bytes_read == 0) {
 332                                                 if(ferror(infile)) {
 333                                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 334                                                         goto wav_abort_;
 335                                                 }
 336                                                 else if(feof(infile)) {
 337                                                         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);
 338                                                         data_bytes = 0;
 339                                                 }
 340                                         }
 341                                         else {
 342                                                 if(bytes_read % bytes_per_wide_sample != 0) {
 343                                                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 344                                                         goto wav_abort_;
 345                                                 }
 346                                                 else {
 347                                                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 348                                                         format_input(input, wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 349
 350                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 351                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 352                                                                 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)]);
 353                                                                 goto wav_abort_;
 354                                                         }
 355                                                         data_bytes -= bytes_read;
 356                                                 }
 357                                         }
 358                                 }
 359
 360                                 /*
 361                                  * now read unaligned samples into reservoir or pad with zeroes if necessary
 362                                  */
 363                                 if(sector_align) {
 364                                         if(is_last_file) {
 365                                                 unsigned wide_samples = 588 - align_remainder;
 366                                                 if(wide_samples < 588) {
 367                                                         unsigned channel;
 368
 369                                                         info_align_zero = wide_samples;
 370                                                         data_bytes = wide_samples * bytes_per_wide_sample;
 371                                                         for(channel = 0; channel < channels; channel++)
 372                                                                 memset(input[channel], 0, data_bytes);
 373                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 374                                                         append_to_verify_fifo(&encoder_wrapper, input, channels, wide_samples);
 375
 376                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 377                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 378                                                                 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)]);
 379                                                                 goto wav_abort_;
 380                                                         }
 381                                                 }
 382                                         }
 383                                         else {
 384                                                 if(*align_reservoir_samples > 0) {
 385                                                         FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
 386                                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), (*align_reservoir_samples) * bytes_per_wide_sample, infile);
 387                                                         if(bytes_read == 0 && ferror(infile)) {
 388                                                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 389                                                                 goto wav_abort_;
 390                                                         }
 391                                                         else if(bytes_read != (*align_reservoir_samples) * bytes_per_wide_sample) {
 392                                                                 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);
 393                                                                 data_bytes = 0;
 394                                                         }
 395                                                         else {
 396                                                                 info_align_carry = *align_reservoir_samples;
 397                                                                 format_input(align_reservoir, *align_reservoir_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 398                                                         }
 399                                                 }
 400                                         }
 401                                 }
 402
 403                                 got_data_chunk = true;
 404                         }
 405                 }
 406                 else {
 407                         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));
 408                         /* sub-chunk size */
 409                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
 410                                 goto wav_abort_;
 411                         if(infile != stdin) {
 412                                 if(-1 == fseek(infile, xx, SEEK_CUR)) {
 413                                         fprintf(stderr, "%s: ERROR during seek while skipping unsupported sub-chunk\n", encoder_wrapper.inbasefilename);
 414                                         goto wav_abort_;
 415                                 }
 416                         }
 417                         else {
 418                                 unsigned left, need;
 419                                 const unsigned chunk = sizeof(ucbuffer);
 420                                 for(left = xx; left > 0; ) {
 421                                         need = min(left, chunk);
 422                                         if(fread(ucbuffer, 1, need, infile) < need) {
 423                                                 fprintf(stderr, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_wrapper.inbasefilename);
 424                                                 goto wav_abort_;
 425                                         }
 426                                         left -= need;
 427                                 }
 428                         }
 429                 }
 430         }
 431
 432         if(encoder_wrapper.encoder) {
 433                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
 434                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 435                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 436         }
 437         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 438                 print_stats(&encoder_wrapper);
 439                 fprintf(stderr, "\n");
 440         }
 441         if(0 != encoder_wrapper.seek_table.points)
 442                 free(encoder_wrapper.seek_table.points);
 443         if(verify) {
 444                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 445                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 446                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 447                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 448                         return 1;
 449                 }
 450         }
 451         if(info_align_carry >= 0)
 452                 fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
 453         if(info_align_zero >= 0)
 454                 fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
 455         if(infile != stdin)
 456                 fclose(infile);
 457         return 0;
 458 wav_abort_:
 459         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 460                 fprintf(stderr, "\n");
 461         if(encoder_wrapper.encoder) {
 462                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
 463                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 464                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 465         }
 466         if(0 != encoder_wrapper.seek_table.points)
 467                 free(encoder_wrapper.seek_table.points);
 468         if(verify) {
 469                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 470                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 471                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 472                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 473                         return 1;
 474                 }
 475         }
 476         if(infile != stdin)
 477                 fclose(infile);
 478         unlink(outfilename);
 479         return 1;
 480 }
 481
 482 int flac__encode_raw(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, FLAC__bool is_last_file, FLAC__bool verbose, FLAC__uint64 skip, FLAC__bool verify, FLAC__bool lax, FLAC__bool do_mid_side, FLAC__bool loose_mid_side, FLAC__bool do_exhaustive_model_search, FLAC__bool do_escape_coding, FLAC__bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 483 {
 484         encoder_wrapper_struct encoder_wrapper;
 485         size_t bytes_read;
 486         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 487
 488         (void)is_last_file;
 489
 490         encoder_wrapper.encoder = 0;
 491         encoder_wrapper.verify = verify;
 492         encoder_wrapper.verbose = verbose;
 493         encoder_wrapper.bytes_written = 0;
 494         encoder_wrapper.samples_written = 0;
 495         encoder_wrapper.stream_offset = 0;
 496         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
 497         encoder_wrapper.outfilename = outfilename;
 498         encoder_wrapper.seek_table.points = 0;
 499         encoder_wrapper.first_seek_point_to_check = 0;
 500
 501         if(0 == strcmp(outfilename, "-")) {
 502                 encoder_wrapper.fout = stdout;
 503         }
 504         else {
 505                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 506                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
 507                         fclose(infile);
 508                         return 1;
 509                 }
 510         }
 511
 512         if(!init(&encoder_wrapper))
 513                 goto raw_abort_;
 514
 515         /* get the file length */
 516         if(infilesize < 0) {
 517                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 518         }
 519         else {
 520                 encoder_wrapper.total_samples_to_encode = (unsigned)infilesize / bytes_per_wide_sample - skip;
 521                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample;
 522         }
 523
 524         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode <= 0)
 525                 fprintf(stderr, "(No runtime statistics possible; please wait for encoding to finish...)\n");
 526
 527         if(skip > 0) {
 528                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)skip;
 529                 if(skip_bytes > lookahead_length) {
 530                         skip_bytes -= lookahead_length;
 531                         lookahead_length = 0;
 532                         if(infile != stdin) {
 533                                 if(-1 == fseek(infile, (long)skip_bytes, SEEK_SET)) {
 534                                         fprintf(stderr, "%s: ERROR during seek while skipping samples\n", encoder_wrapper.inbasefilename);
 535                                         goto raw_abort_;
 536                                 }
 537                         }
 538                         else {
 539                                 unsigned left, need;
 540                                 const unsigned chunk = sizeof(ucbuffer);
 541                                 for(left = skip_bytes; left > 0; ) {
 542                                         need = min(left, chunk);
 543                                         if(fread(ucbuffer, 1, need, infile) < need) {
 544                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
 545                                                 goto raw_abort_;
 546                                         }
 547                                         left -= need;
 548                                 }
 549                         }
 550                 }
 551                 else {
 552                         lookahead += skip_bytes;
 553                         lookahead_length -= skip_bytes;
 554                 }
 555         }
 556         else {
 557                 fseek(infile, 0, SEEK_SET);
 558         }
 559
 560         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_escape_coding, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 561                 goto raw_abort_;
 562
 563         encoder_wrapper.verify_fifo.into_frames = true;
 564
 565         while(!feof(infile)) {
 566                 if(lookahead_length > 0) {
 567                         FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
 568                         memcpy(ucbuffer, lookahead, lookahead_length);
 569                         bytes_read = fread(ucbuffer+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
 570                         if(ferror(infile)) {
 571                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 572                                 goto raw_abort_;
 573                         }
 574                         lookahead_length = 0;
 575                 }
 576                 else
 577                         bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
 578
 579                 if(bytes_read == 0) {
 580                         if(ferror(infile)) {
 581                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
 582                                 goto raw_abort_;
 583                         }
 584                 }
 585                 else if(bytes_read % bytes_per_wide_sample != 0) {
 586                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
 587                         goto raw_abort_;
 588                 }
 589                 else {
 590                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 591                         format_input(input, wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 592
 593                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 594                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, 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                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
 603                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 604                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 605         }
 606         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 607                 print_stats(&encoder_wrapper);
 608                 fprintf(stderr, "\n");
 609         }
 610         if(0 != encoder_wrapper.seek_table.points)
 611                 free(encoder_wrapper.seek_table.points);
 612         if(verify) {
 613                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 614                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 615                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 616                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 617                         return 1;
 618                 }
 619         }
 620         if(infile != stdin)
 621                 fclose(infile);
 622         return 0;
 623 raw_abort_:
 624         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 625                 fprintf(stderr, "\n");
 626         if(encoder_wrapper.encoder) {
 627                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
 628                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
 629                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
 630         }
 631         if(0 != encoder_wrapper.seek_table.points)
 632                 free(encoder_wrapper.seek_table.points);
 633         if(verify) {
 634                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
 635                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
 636                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 637                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 638                         return 1;
 639                 }
 640         }
 641         if(infile != stdin)
 642                 fclose(infile);
 643         unlink(outfilename);
 644         return 1;
 645 }
 646
 647 FLAC__bool init(encoder_wrapper_struct *encoder_wrapper)
 648 {
 649         unsigned i;
 650         FLAC__uint32 test = 1;
 651
 652         is_big_endian_host = (*((FLAC__byte*)(&test)))? false : true;
 653
 654         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 655                 input[i] = &(in[i][0]);
 656
 657         encoder_wrapper->encoder = FLAC__stream_encoder_new();
 658         if(0 == encoder_wrapper->encoder) {
 659                 fprintf(stderr, "%s: ERROR creating the encoder instance\n", encoder_wrapper->inbasefilename);
 660                 return false;
 661         }
 662
 663         return true;
 664 }
 665
 666 FLAC__bool init_encoder(FLAC__bool lax, FLAC__bool do_mid_side, FLAC__bool loose_mid_side, FLAC__bool do_exhaustive_model_search, FLAC__bool do_escape_coding, FLAC__bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper)
 667 {
 668         unsigned i;
 669
 670         if(channels != 2)
 671                 do_mid_side = loose_mid_side = false;
 672
 673         if(encoder_wrapper->verify) {
 674                 /* set up the fifo which will hold the original signal to compare against */
 675                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 676                 for(i = 0; i < channels; i++) {
 677                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder_wrapper->verify_fifo.size))) {
 678                                 fprintf(stderr, "%s: ERROR allocating verify buffers\n", encoder_wrapper->inbasefilename);
 679                                 return false;
 680                         }
 681                 }
 682                 encoder_wrapper->verify_fifo.tail = 0;
 683                 encoder_wrapper->verify_fifo.into_frames = false;
 684                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 685
 686                 /* set up a stream decoder for verification */
 687                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_new();
 688                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 689                         fprintf(stderr, "%s: ERROR creating the verify decoder instance\n", encoder_wrapper->inbasefilename);
 690                         return false;
 691                 }
 692                 FLAC__stream_decoder_set_read_callback(encoder_wrapper->verify_fifo.decoder, verify_read_callback);
 693                 FLAC__stream_decoder_set_write_callback(encoder_wrapper->verify_fifo.decoder, verify_write_callback);
 694                 FLAC__stream_decoder_set_metadata_callback(encoder_wrapper->verify_fifo.decoder, verify_metadata_callback);
 695                 FLAC__stream_decoder_set_error_callback(encoder_wrapper->verify_fifo.decoder, verify_error_callback);
 696                 FLAC__stream_decoder_set_client_data(encoder_wrapper->verify_fifo.decoder, encoder_wrapper);
 697                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
 698                         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)]);
 699                         return false;
 700                 }
 701         }
 702
 703         if(!convert_to_seek_table(requested_seek_points, num_requested_seek_points, encoder_wrapper->total_samples_to_encode, blocksize, &encoder_wrapper->seek_table)) {
 704                 fprintf(stderr, "%s: ERROR allocating seek table\n", encoder_wrapper->inbasefilename);
 705                 return false;
 706         }
 707
 708         FLAC__stream_encoder_set_streamable_subset(encoder_wrapper->encoder, !lax);
 709         FLAC__stream_encoder_set_do_mid_side_stereo(encoder_wrapper->encoder, do_mid_side);
 710         FLAC__stream_encoder_set_loose_mid_side_stereo(encoder_wrapper->encoder, loose_mid_side);
 711         FLAC__stream_encoder_set_channels(encoder_wrapper->encoder, channels);
 712         FLAC__stream_encoder_set_bits_per_sample(encoder_wrapper->encoder, bps);
 713         FLAC__stream_encoder_set_sample_rate(encoder_wrapper->encoder, sample_rate);
 714         FLAC__stream_encoder_set_blocksize(encoder_wrapper->encoder, blocksize);
 715         FLAC__stream_encoder_set_max_lpc_order(encoder_wrapper->encoder, max_lpc_order);
 716         FLAC__stream_encoder_set_qlp_coeff_precision(encoder_wrapper->encoder, qlp_coeff_precision);
 717         FLAC__stream_encoder_set_do_qlp_coeff_prec_search(encoder_wrapper->encoder, do_qlp_coeff_prec_search);
 718         FLAC__stream_encoder_set_do_escape_coding(encoder_wrapper->encoder, do_escape_coding);
 719         FLAC__stream_encoder_set_do_exhaustive_model_search(encoder_wrapper->encoder, do_exhaustive_model_search);
 720         FLAC__stream_encoder_set_min_residual_partition_order(encoder_wrapper->encoder, min_residual_partition_order);
 721         FLAC__stream_encoder_set_max_residual_partition_order(encoder_wrapper->encoder, max_residual_partition_order);
 722         FLAC__stream_encoder_set_rice_parameter_search_dist(encoder_wrapper->encoder, rice_parameter_search_dist);
 723         FLAC__stream_encoder_set_total_samples_estimate(encoder_wrapper->encoder, encoder_wrapper->total_samples_to_encode);
 724         FLAC__stream_encoder_set_seek_table(encoder_wrapper->encoder, (encoder_wrapper->seek_table.num_points > 0)? &encoder_wrapper->seek_table : 0);
 725         FLAC__stream_encoder_set_padding(encoder_wrapper->encoder, padding);
 726         FLAC__stream_encoder_set_last_metadata_is_last(encoder_wrapper->encoder, true);
 727         FLAC__stream_encoder_set_write_callback(encoder_wrapper->encoder, write_callback);
 728         FLAC__stream_encoder_set_metadata_callback(encoder_wrapper->encoder, metadata_callback);
 729         FLAC__stream_encoder_set_client_data(encoder_wrapper->encoder, encoder_wrapper);
 730
 731         if(FLAC__stream_encoder_init(encoder_wrapper->encoder) != FLAC__STREAM_ENCODER_OK) {
 732                 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)]);
 733                 return false;
 734         }
 735
 736         /* the above call writes all the metadata, so we save the stream offset now */
 737         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
 738
 739         return true;
 740 }
 741
 742 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)
 743 {
 744         unsigned i, j, real_points, placeholders;
 745         char *pt = requested_seek_points, *q;
 746         FLAC__bool first;
 747
 748         seek_table->num_points = 0;
 749
 750         if(num_requested_seek_points == 0)
 751                 return true;
 752
 753         if(num_requested_seek_points < 0) {
 754                 strcpy(requested_seek_points, "100x<");
 755                 num_requested_seek_points = 1;
 756         }
 757
 758         /* first count how many individual seek point we may need */
 759         real_points = placeholders = 0;
 760         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 761                 q = strchr(pt, '<');
 762                 FLAC__ASSERT(0 != q);
 763                 *q = '\0';
 764
 765                 if(0 == strcmp(pt, "X")) { /* -S X */
 766                         placeholders++;
 767                 }
 768                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 769                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
 770                                 real_points += (unsigned)atoi(pt);
 771                 }
 772                 else { /* -S # */
 773                         real_points++;
 774                 }
 775                 *q++ = '<';
 776
 777                 pt = q;
 778         }
 779         pt = requested_seek_points;
 780
 781         /* make some space */
 782         if(0 == (seek_table->points = (FLAC__StreamMetaData_SeekPoint*)malloc(sizeof(FLAC__StreamMetaData_SeekPoint) * (real_points+placeholders))))
 783                 return false;
 784
 785         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
 786         for(i = 0; i < real_points+placeholders; i++) {
 787                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 788                 seek_table->points[i].stream_offset = 0;
 789                 seek_table->points[i].frame_samples = 0;
 790         }
 791
 792         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 793                 q = strchr(pt, '<');
 794                 FLAC__ASSERT(0 != q);
 795                 *q++ = '\0';
 796
 797                 if(0 == strcmp(pt, "X")) { /* -S X */
 798                         ; /* we append placeholders later */
 799                 }
 800                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 801                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
 802                                 unsigned j, n;
 803                                 n = (unsigned)atoi(pt);
 804                                 for(j = 0; j < n; j++)
 805                                         append_point_to_seek_table(seek_table, stream_samples * (FLAC__uint64)j / (FLAC__uint64)n, stream_samples, blocksize);
 806                         }
 807                 }
 808                 else { /* -S # */
 809                         append_point_to_seek_table(seek_table, (FLAC__uint64)atoi(pt), stream_samples, blocksize);
 810                 }
 811
 812                 pt = q;
 813         }
 814
 815         /* sort the seekpoints */
 816         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetaData_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
 817
 818         /* uniqify the seekpoints */
 819         first = true;
 820         for(i = j = 0; i < seek_table->num_points; i++) {
 821                 if(!first) {
 822                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
 823                                 continue;
 824                 }
 825                 first = false;
 826                 seek_table->points[j++] = seek_table->points[i];
 827         }
 828         seek_table->num_points = j;
 829
 830         /* append placeholders */
 831         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
 832                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 833         seek_table->num_points += placeholders;
 834
 835         return true;
 836 }
 837
 838 void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize)
 839 {
 840         const FLAC__uint64 target_sample = (sample / blocksize) * blocksize;
 841
 842         if(stream_samples == 0 || target_sample < stream_samples)
 843                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
 844 }
 845
 846 int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r)
 847 {
 848         /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */
 849         if(l->sample_number == r->sample_number)
 850                 return 0;
 851         else if(l->sample_number < r->sample_number)
 852                 return -1;
 853         else
 854                 return 1;
 855 }
 856
 857 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)
 858 {
 859         unsigned wide_sample, sample, channel, byte;
 860
 861         if(bps == 8) {
 862                 if(is_unsigned_samples) {
 863                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 864                                 for(channel = 0; channel < channels; channel++, sample++)
 865                                         dest[channel][wide_sample] = (FLAC__int32)ucbuffer[sample] - 0x80;
 866                 }
 867                 else {
 868                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 869                                 for(channel = 0; channel < channels; channel++, sample++)
 870                                         dest[channel][wide_sample] = (FLAC__int32)scbuffer[sample];
 871                 }
 872         }
 873         else if(bps == 16) {
 874                 if(is_big_endian != is_big_endian_host) {
 875                         unsigned char tmp;
 876                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 877                         for(byte = 0; byte < bytes; byte += 2) {
 878                                 tmp = ucbuffer[byte];
 879                                 ucbuffer[byte] = ucbuffer[byte+1];
 880                                 ucbuffer[byte+1] = tmp;
 881                         }
 882                 }
 883                 if(is_unsigned_samples) {
 884                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 885                                 for(channel = 0; channel < channels; channel++, sample++)
 886                                         dest[channel][wide_sample] = (FLAC__int32)usbuffer[sample] - 0x8000;
 887                 }
 888                 else {
 889                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 890                                 for(channel = 0; channel < channels; channel++, sample++)
 891                                         dest[channel][wide_sample] = (FLAC__int32)ssbuffer[sample];
 892                 }
 893         }
 894         else if(bps == 24) {
 895                 if(!is_big_endian) {
 896                         unsigned char tmp;
 897                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 898                         for(byte = 0; byte < bytes; byte += 3) {
 899                                 tmp = ucbuffer[byte];
 900                                 ucbuffer[byte] = ucbuffer[byte+2];
 901                                 ucbuffer[byte+2] = tmp;
 902                         }
 903                 }
 904                 if(is_unsigned_samples) {
 905                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 906                                 for(channel = 0; channel < channels; channel++, sample++) {
 907                                         dest[channel][wide_sample]  = ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 908                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 909                                         dest[channel][wide_sample] |= ucbuffer[byte++];
 910                                         dest[channel][wide_sample] -= 0x800000;
 911                                 }
 912                 }
 913                 else {
 914                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 915                                 for(channel = 0; channel < channels; channel++, sample++) {
 916                                         dest[channel][wide_sample]  = scbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 917                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
 918                                         dest[channel][wide_sample] |= ucbuffer[byte++];
 919                                 }
 920                 }
 921         }
 922         else {
 923                 FLAC__ASSERT(0);
 924         }
 925
 926         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 927         append_to_verify_fifo(encoder_wrapper, dest, channels, wide_samples);
 928 }
 929
 930 void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 *src[], unsigned channels, unsigned wide_samples)
 931 {
 932         if(encoder_wrapper->verify) {
 933                 unsigned channel;
 934                 for(channel = 0; channel < channels; channel++)
 935                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], src[channel], sizeof(FLAC__int32) * wide_samples);
 936                 encoder_wrapper->verify_fifo.tail += wide_samples;
 937                 FLAC__ASSERT(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 938         }
 939 }
 940
 941 FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 942 {
 943         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 944         const unsigned mask = (FLAC__stream_encoder_get_do_exhaustive_model_search(encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(encoder))? 0x1f : 0x7f;
 945
 946         /* 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) */
 947         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
 948                 FLAC__uint64 current_sample = (FLAC__uint64)current_frame * (FLAC__uint64)FLAC__stream_encoder_get_blocksize(encoder), test_sample;
 949                 unsigned i;
 950                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
 951                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
 952                         if(test_sample > current_sample) {
 953                                 break;
 954                         }
 955                         else if(test_sample == current_sample) {
 956                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
 957                                 encoder_wrapper->seek_table.points[i].frame_samples = FLAC__stream_encoder_get_blocksize(encoder);
 958                                 encoder_wrapper->first_seek_point_to_check++;
 959                                 break;
 960                         }
 961                         else {
 962                                 encoder_wrapper->first_seek_point_to_check++;
 963                         }
 964                 }
 965         }
 966
 967         encoder_wrapper->bytes_written += bytes;
 968         encoder_wrapper->samples_written += samples;
 969         encoder_wrapper->current_frame = current_frame;
 970
 971         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 972                 print_stats(encoder_wrapper);
 973
 974         if(encoder_wrapper->verify) {
 975                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 976                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 977                 if(encoder_wrapper->verify_fifo.into_frames) {
 978                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 979                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 980                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
 981                         }
 982                 }
 983                 else {
 984                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 985                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 986                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
 987                         }
 988                 }
 989         }
 990
 991         if(fwrite(buffer, sizeof(FLAC__byte), bytes, encoder_wrapper->fout) == bytes)
 992                 return FLAC__STREAM_ENCODER_WRITE_OK;
 993         else
 994                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
 995 }
 996
 997 void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 998 {
 999         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1000         FLAC__byte b;
1001         FILE *f;
1002         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
1003         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
1004         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
1005
1006         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
1007
1008         /*
1009          * we get called by the encoder when the encoding process has
1010          * finished so that we can update the STREAMINFO and SEEKTABLE
1011          * blocks.
1012          */
1013
1014         (void)encoder; /* silence compiler warning about unused parameter */
1015
1016         if(encoder_wrapper->fout == stdout)
1017                 return;
1018
1019         fclose(encoder_wrapper->fout);
1020         if(0 == (f = fopen(encoder_wrapper->outfilename, "r+b")))
1021                 return;
1022
1023         /* all this is based on intimate knowledge of the stream header
1024          * layout, but a change to the header format that would break this
1025          * would also break all streams encoded in the previous format.
1026          */
1027
1028         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
1029         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
1030
1031 samples_:
1032         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
1033         if(fread(&b, 1, 1, f) != 1) goto framesize_;
1034         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
1035         b = (b & 0xf0) | (FLAC__byte)((samples >> 32) & 0x0F);
1036         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1037         b = (FLAC__byte)((samples >> 24) & 0xFF);
1038         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1039         b = (FLAC__byte)((samples >> 16) & 0xFF);
1040         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1041         b = (FLAC__byte)((samples >> 8) & 0xFF);
1042         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1043         b = (FLAC__byte)(samples & 0xFF);
1044         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1045
1046 framesize_:
1047         if(-1 == fseek(f, 12, SEEK_SET)) goto seektable_;
1048         b = (FLAC__byte)((min_framesize >> 16) & 0xFF);
1049         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1050         b = (FLAC__byte)((min_framesize >> 8) & 0xFF);
1051         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1052         b = (FLAC__byte)(min_framesize & 0xFF);
1053         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1054         b = (FLAC__byte)((max_framesize >> 16) & 0xFF);
1055         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1056         b = (FLAC__byte)((max_framesize >> 8) & 0xFF);
1057         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1058         b = (FLAC__byte)(max_framesize & 0xFF);
1059         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1060
1061 seektable_:
1062         if(encoder_wrapper->seek_table.num_points > 0) {
1063                 long pos;
1064                 unsigned i;
1065
1066                 /* convert any unused seek points to placeholders */
1067                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1068                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
1069                                 break;
1070                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
1071                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
1072                 }
1073
1074                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
1075                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1076                 pos += metadata->length;
1077                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1078                 if(-1 == fseek(f, pos, SEEK_SET)) goto end_;
1079                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1080                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
1081                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
1082                         if(!write_big_endian_uint16(f, (FLAC__uint16)encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
1083                 }
1084         }
1085
1086 end_:
1087         fclose(f);
1088         return;
1089 }
1090
1091 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
1092 {
1093         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1094         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
1095         (void)decoder;
1096
1097         if(encoded_bytes <= *bytes) {
1098                 *bytes = encoded_bytes;
1099                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1100         }
1101         else {
1102                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1103                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
1104                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
1105         }
1106
1107         return FLAC__STREAM_DECODER_READ_CONTINUE;
1108 }
1109
1110 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data)
1111 {
1112         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1113         unsigned channel, l, r;
1114         const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
1115         const unsigned bytes_per_block = sizeof(FLAC__int32) * FLAC__stream_decoder_get_blocksize(decoder);
1116
1117         for(channel = 0; channel < channels; channel++) {
1118                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], bytes_per_block)) {
1119                         unsigned sample = 0;
1120                         int expect = 0, got = 0;
1121                         fprintf(stderr, "\n%s: ERROR: mismatch in decoded data, verify FAILED!\n", encoder_wrapper->inbasefilename);
1122                         fprintf(stderr, "       Please submit a bug report to\n");
1123                         fprintf(stderr, "           http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
1124                         fprintf(stderr, "       Make sure to include an email contact in the comment and/or use the\n");
1125                         fprintf(stderr, "       \"Monitor\" feature to monitor the bug status.\n");
1126                         for(l = 0, r = FLAC__stream_decoder_get_blocksize(decoder); l < r; l++) {
1127                                 if(buffer[channel][l] != encoder_wrapper->verify_fifo.original[channel][l]) {
1128                                         sample = l;
1129                                         expect = (int)encoder_wrapper->verify_fifo.original[channel][l];
1130                                         got = (int)buffer[channel][l];
1131                                         break;
1132                                 }
1133                         }
1134                         FLAC__ASSERT(l < r);
1135                         FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
1136                         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 */
1137                         return FLAC__STREAM_DECODER_WRITE_ABORT;
1138                 }
1139         }
1140         /* dequeue the frame from the fifo */
1141         for(channel = 0; channel < channels; channel++) {
1142                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
1143                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
1144                 }
1145         }
1146         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
1147         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
1148 }
1149
1150 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
1151 {
1152         (void)decoder;
1153         (void)metadata;
1154         (void)client_data;
1155 }
1156
1157 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1158 {
1159         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1160         (void)decoder;
1161         fprintf(stderr, "\n%s: ERROR: verification decoder returned error %d:%s\n", encoder_wrapper->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1162 }
1163
1164 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
1165 {
1166 #ifdef _MSC_VER
1167         /* with VC++ you have to spoon feed it the casting */
1168         const double progress = (double)(FLAC__int64)encoder_wrapper->samples_written / (double)(FLAC__int64)encoder_wrapper->total_samples_to_encode;
1169         const double ratio = (double)(FLAC__int64)encoder_wrapper->bytes_written / ((double)(FLAC__int64)encoder_wrapper->unencoded_size * progress);
1170 #else
1171         const double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1172         const double ratio = (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress);
1173 #endif
1174
1175         if(encoder_wrapper->samples_written == encoder_wrapper->total_samples_to_encode) {
1176                 fprintf(stderr, "\r%s:%s wrote %u bytes, ratio=%0.3f",
1177                         encoder_wrapper->inbasefilename,
1178                         encoder_wrapper->verify? (encoder_wrapper->verify_fifo.result == FLAC__VERIFY_OK? " Verify OK," : " Verify FAILED!") : "",
1179                         (unsigned)encoder_wrapper->bytes_written,
1180                         ratio
1181                 );
1182         }
1183         else {
1184                 fprintf(stderr, "\r%s: %u%% complete, ratio=%0.3f", encoder_wrapper->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
1185         }
1186 }
1187
1188 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
1189 {
1190         size_t bytes_read = fread(val, 1, 2, f);
1191
1192         if(bytes_read == 0) {
1193                 if(!eof_ok) {
1194                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1195                         return false;
1196                 }
1197                 else
1198                         return true;
1199         }
1200         else if(bytes_read < 2) {
1201                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1202                 return false;
1203         }
1204         else {
1205                 if(is_big_endian_host) {
1206                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1207                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1208                 }
1209                 return true;
1210         }
1211 }
1212
1213 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1214 {
1215         size_t bytes_read = fread(val, 1, 4, f);
1216
1217         if(bytes_read == 0) {
1218                 if(!eof_ok) {
1219                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1220                         return false;
1221                 }
1222                 else
1223                         return true;
1224         }
1225         else if(bytes_read < 4) {
1226                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1227                 return false;
1228         }
1229         else {
1230                 if(is_big_endian_host) {
1231                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1232                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1233                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1234                 }
1235                 return true;
1236         }
1237 }
1238
1239 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
1240 {
1241         if(!is_big_endian_host) {
1242                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1243                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1244         }
1245         return fwrite(&val, 1, 2, f) == 2;
1246 }
1247
1248 FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val)
1249 {
1250         if(!is_big_endian_host) {
1251                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1252                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1253                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1254                 tmp = b[2]; b[2] = b[5]; b[5] = tmp;
1255                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1256         }
1257         return fwrite(&val, 1, 8, f) == 8;
1258 }