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 /*@@@ need to "_finish()" the verify decoder */
  20
  21 #include <assert.h>
  22 #if defined _WIN32 && !defined __CYGWIN__
  23 /* where MSVC puts unlink() */
  24 # include <io.h>
  25 #else
  26 # include <unistd.h>
  27 #endif
  28 #include <stdio.h> /* for FILE et al. */
  29 #include <stdlib.h> /* for malloc */
  30 #include <string.h> /* for strcmp() */
  31 #include "FLAC/all.h"
  32 #include "encode.h"
  33
  34 #ifdef min
  35 #undef min
  36 #endif
  37 #define min(x,y) ((x)<(y)?(x):(y))
  38
  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         int32 *original[FLAC__MAX_CHANNELS];
  55         unsigned size; /* of each original[] in samples */
  56         unsigned tail; /* in wide samples */
  57         const byte *encoded_signal;
  58         unsigned encoded_signal_capacity;
  59         unsigned encoded_bytes;
  60         bool into_frames;
  61         verify_code result;
  62         FLAC__StreamDecoder *decoder;
  63 } verify_fifo_struct;
  64
  65 typedef struct {
  66         FILE *fout;
  67         const char *outfile;
  68         FLAC__Encoder *encoder;
  69         bool verify;
  70         bool verbose;
  71         uint64 unencoded_size;
  72         uint64 total_samples_to_encode;
  73         uint64 bytes_written;
  74         uint64 samples_written;
  75         uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
  76         unsigned current_frame;
  77         verify_fifo_struct verify_fifo;
  78         FLAC__StreamMetaData_SeekTable seek_table;
  79         unsigned first_seek_point_to_check;
  80 } encoder_wrapper_struct;
  81
  82 static bool is_big_endian_host;
  83
  84 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
  85 static signed char *scbuffer = (signed char *)ucbuffer;
  86 static uint16 *usbuffer = (uint16 *)ucbuffer;
  87 static int16 *ssbuffer = (int16 *)ucbuffer;
  88
  89 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  90 static int32 *input[FLAC__MAX_CHANNELS];
  91
  92 /* local routines */
  93 static bool init(encoder_wrapper_struct *encoder_wrapper);
  94 static bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, 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);
  95 static bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table);
  96 static void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize);
  97 static int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r);
  98 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  99 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
 100 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
 101 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
 102 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
 103 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
 104 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 105 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
 106 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
 107 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
 108 static bool write_big_endian_uint16(FILE *f, uint16 val);
 109 static bool write_big_endian_uint64(FILE *f, uint64 val);
 110
 111 int encode_wav(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points)
 112 {
 113         encoder_wrapper_struct encoder_wrapper;
 114         FILE *fin;
 115         bool is_unsigned_samples;
 116         unsigned channels, bps, sample_rate, data_bytes;
 117         size_t bytes_per_wide_sample, bytes_read;
 118         uint16 x;
 119         uint32 xx;
 120
 121         encoder_wrapper.encoder = 0;
 122         encoder_wrapper.verify = verify;
 123         encoder_wrapper.verbose = verbose;
 124         encoder_wrapper.bytes_written = 0;
 125         encoder_wrapper.samples_written = 0;
 126         encoder_wrapper.outfile = outfile;
 127         encoder_wrapper.seek_table.points = 0;
 128         encoder_wrapper.first_seek_point_to_check = 0;
 129
 130         if(0 == strcmp(infile, "-")) {
 131                 fin = stdin;
 132         }
 133         else {
 134                 if(0 == (fin = fopen(infile, "rb"))) {
 135                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 136                         return false;
 137                 }
 138         }
 139         if(0 == strcmp(outfile, "-")) {
 140                 encoder_wrapper.fout = stdout;
 141         }
 142         else {
 143                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 144                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 145                         fclose(fin);
 146                         return false;
 147                 }
 148         }
 149
 150         if(!init(&encoder_wrapper))
 151                 goto wav_abort_;
 152
 153         /*
 154          * check the RIFF chunk
 155          */
 156         if(!read_little_endian_uint32(fin, &xx, false))
 157                 goto wav_abort_;
 158         if(xx != 0x46464952) { /* "RIFF" */
 159                 fprintf(stderr, "ERROR: no RIFF header\n");
 160                 goto wav_abort_;
 161         }
 162         if(!read_little_endian_uint32(fin, &xx, false))
 163                 goto wav_abort_;
 164
 165         /*
 166          * now process the WAVE chunk
 167          */
 168         if(!read_little_endian_uint32(fin, &xx, true))
 169                 goto wav_end_;
 170         if(xx != 0x45564157) { /* "WAVE" */
 171                 fprintf(stderr, "ERROR: no WAVE header\n");
 172                 goto wav_abort_;
 173         }
 174
 175         /* do the format sub-chunk */
 176         if(!read_little_endian_uint32(fin, &xx, false))
 177                 goto wav_abort_;
 178         if(xx != 0x20746d66) { /* "fmt " */
 179                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 180                 goto wav_abort_;
 181         }
 182         /* fmt chunk size */
 183         if(!read_little_endian_uint32(fin, &xx, false))
 184                 goto wav_abort_;
 185         if(xx != 16) {
 186                 fprintf(stderr, "ERROR: unsupported chunk\n");
 187                 goto wav_abort_;
 188         }
 189         /* compression code */
 190         if(!read_little_endian_uint16(fin, &x, false))
 191                 goto wav_abort_;
 192         if(x != 1) {
 193                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 194                 goto wav_abort_;
 195         }
 196         /* number of channels */
 197         if(!read_little_endian_uint16(fin, &x, false))
 198                 goto wav_abort_;
 199         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 200                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 201                 goto wav_abort_;
 202         }
 203         channels = x;
 204         /* sample rate */
 205         if(!read_little_endian_uint32(fin, &xx, false))
 206                 goto wav_abort_;
 207         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 208                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 209                 goto wav_abort_;
 210         }
 211         sample_rate = xx;
 212         /* avg bytes per second (ignored) */
 213         if(!read_little_endian_uint32(fin, &xx, false))
 214                 goto wav_abort_;
 215         /* block align (ignored) */
 216         if(!read_little_endian_uint16(fin, &x, false))
 217                 goto wav_abort_;
 218         /* bits per sample */
 219         if(!read_little_endian_uint16(fin, &x, false))
 220                 goto wav_abort_;
 221         if(x != 8 && x != 16) {
 222                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 223                 goto wav_abort_;
 224         }
 225         bps = x;
 226         is_unsigned_samples = (x == 8);
 227
 228         /* do the data sub-chunk */
 229         if(!read_little_endian_uint32(fin, &xx, false))
 230                 goto wav_abort_;
 231         if(xx != 0x61746164) { /* "data" */
 232                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 233                 goto wav_abort_;
 234         }
 235         /* data size */
 236         if(!read_little_endian_uint32(fin, &xx, false))
 237                 goto wav_abort_;
 238         data_bytes = xx;
 239
 240         bytes_per_wide_sample = channels * (bps >> 3);
 241
 242         if(skip > 0) {
 243                 if(fin != stdin) {
 244                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 245                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 246                                 goto wav_abort_;
 247                         }
 248                 }
 249                 else {
 250                         int64 left;
 251                         unsigned need;
 252                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 253                                 need = min(left, CHUNK_OF_SAMPLES);
 254                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 255                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 256                                         goto wav_abort_;
 257                                 }
 258                         }
 259                 }
 260         }
 261
 262         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 263         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 264
 265         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 266                 goto wav_abort_;
 267
 268         encoder_wrapper.verify_fifo.into_frames = true;
 269
 270         while(data_bytes > 0) {
 271                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 272                 if(bytes_read == 0) {
 273                         if(ferror(fin)) {
 274                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 275                                 goto wav_abort_;
 276                         }
 277                         else if(feof(fin))
 278                                 break;
 279                 }
 280                 else {
 281                         if(bytes_read > data_bytes)
 282                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 283                         if(bytes_read % bytes_per_wide_sample != 0) {
 284                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 285                                 goto wav_abort_;
 286                         }
 287                         else {
 288                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 289                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 290
 291                                 /* 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: */
 292                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 293                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 294                                         goto wav_abort_;
 295                                 }
 296                                 data_bytes -= bytes_read;
 297                         }
 298                 }
 299         }
 300
 301 wav_end_:
 302         if(encoder_wrapper.encoder) {
 303                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 304                         FLAC__encoder_finish(encoder_wrapper.encoder);
 305                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 306         }
 307         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 308                 print_stats(&encoder_wrapper);
 309                 printf("\n");
 310         }
 311         if(0 != encoder_wrapper.seek_table.points)
 312                 free(encoder_wrapper.seek_table.points);
 313         if(verify) {
 314                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 315                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 316                         return 1;
 317                 }
 318                 else {
 319                         printf("Verify succeeded\n");
 320                 }
 321         }
 322         fclose(fin);
 323         return 0;
 324 wav_abort_:
 325         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 326                 printf("\n");
 327         if(encoder_wrapper.encoder) {
 328                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 329                         FLAC__encoder_finish(encoder_wrapper.encoder);
 330                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 331         }
 332         if(0 != encoder_wrapper.seek_table.points)
 333                 free(encoder_wrapper.seek_table.points);
 334         if(verify) {
 335                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 336                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 337                         return 1;
 338                 }
 339                 else {
 340                         printf("Verify succeeded\n");
 341                 }
 342         }
 343         fclose(fin);
 344         unlink(outfile);
 345         return 1;
 346 }
 347
 348 int encode_raw(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 349 {
 350         encoder_wrapper_struct encoder_wrapper;
 351         FILE *fin;
 352         size_t bytes_read;
 353         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 354
 355         encoder_wrapper.encoder = 0;
 356         encoder_wrapper.verify = verify;
 357         encoder_wrapper.verbose = verbose;
 358         encoder_wrapper.bytes_written = 0;
 359         encoder_wrapper.samples_written = 0;
 360         encoder_wrapper.outfile = outfile;
 361         encoder_wrapper.seek_table.points = 0;
 362         encoder_wrapper.first_seek_point_to_check = 0;
 363
 364         if(0 == strcmp(infile, "-")) {
 365                 fin = stdin;
 366         }
 367         else {
 368                 if(0 == (fin = fopen(infile, "rb"))) {
 369                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 370                         return false;
 371                 }
 372         }
 373         if(0 == strcmp(outfile, "-")) {
 374                 encoder_wrapper.fout = stdout;
 375         }
 376         else {
 377                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 378                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 379                         fclose(fin);
 380                         return false;
 381                 }
 382         }
 383
 384         if(!init(&encoder_wrapper))
 385                 goto raw_abort_;
 386
 387         /* get the file length */
 388         if(0 != fseek(fin, 0, SEEK_END)) {
 389                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 390         }
 391         else {
 392                 long filesize;
 393                 fflush(fin);
 394                 if(-1 == (filesize = ftell(fin))) {
 395                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 396                 }
 397                 else {
 398                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 399                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 400                 }
 401         }
 402
 403         if(skip > 0) {
 404                 if(fin != stdin) {
 405                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 406                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 407                                 goto raw_abort_;
 408                         }
 409                 }
 410                 else {
 411                         int64 left;
 412                         unsigned need;
 413                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 414                                 need = min(left, CHUNK_OF_SAMPLES);
 415                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 416                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 417                                         goto raw_abort_;
 418                                 }
 419                         }
 420                 }
 421         }
 422         else {
 423                 fseek(fin, 0, SEEK_SET);
 424         }
 425
 426         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 427                 goto raw_abort_;
 428
 429         encoder_wrapper.verify_fifo.into_frames = true;
 430
 431         while(!feof(fin)) {
 432                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 433                 if(bytes_read == 0) {
 434                         if(ferror(fin)) {
 435                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 436                                 goto raw_abort_;
 437                         }
 438                 }
 439                 else if(bytes_read % bytes_per_wide_sample != 0) {
 440                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 441                         goto raw_abort_;
 442                 }
 443                 else {
 444                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 445                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 446
 447                         /* 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: */
 448                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 449                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 450                                 goto raw_abort_;
 451                         }
 452                 }
 453         }
 454
 455         if(encoder_wrapper.encoder) {
 456                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 457                         FLAC__encoder_finish(encoder_wrapper.encoder);
 458                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 459         }
 460         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 461                 print_stats(&encoder_wrapper);
 462                 printf("\n");
 463         }
 464         if(0 != encoder_wrapper.seek_table.points)
 465                 free(encoder_wrapper.seek_table.points);
 466         if(verify) {
 467                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 468                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 469                         return 1;
 470                 }
 471                 else {
 472                         printf("Verify succeeded\n");
 473                 }
 474         }
 475         fclose(fin);
 476         return 0;
 477 raw_abort_:
 478         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 479                 printf("\n");
 480         if(encoder_wrapper.encoder) {
 481                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 482                         FLAC__encoder_finish(encoder_wrapper.encoder);
 483                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 484         }
 485         if(0 != encoder_wrapper.seek_table.points)
 486                 free(encoder_wrapper.seek_table.points);
 487         if(verify) {
 488                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 489                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 490                         return 1;
 491                 }
 492                 else {
 493                         printf("Verify succeeded\n");
 494                 }
 495         }
 496         fclose(fin);
 497         unlink(outfile);
 498         return 1;
 499 }
 500
 501 bool init(encoder_wrapper_struct *encoder_wrapper)
 502 {
 503         unsigned i;
 504         uint32 test = 1;
 505
 506         is_big_endian_host = (*((byte*)(&test)))? false : true;
 507
 508         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 509                 input[i] = &(in[i][0]);
 510
 511         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 512         if(0 == encoder_wrapper->encoder) {
 513                 fprintf(stderr, "ERROR creating the encoder instance\n");
 514                 return false;
 515         }
 516
 517         return true;
 518 }
 519
 520 bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, 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)
 521 {
 522         unsigned i;
 523
 524         if(channels != 2)
 525                 do_mid_side = loose_mid_side = false;
 526
 527         if(encoder_wrapper->verify) {
 528                 /* set up the fifo which will hold the original signal to compare against */
 529                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 530                 for(i = 0; i < channels; i++) {
 531                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 532                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 533                                 return false;
 534                         }
 535                 }
 536                 encoder_wrapper->verify_fifo.tail = 0;
 537                 encoder_wrapper->verify_fifo.into_frames = false;
 538                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 539
 540                 /* set up a stream decoder for verification */
 541                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 542                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 543                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 544                         return false;
 545                 }
 546                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder, verify_read_callback, verify_write_callback, verify_metadata_callback, verify_error_callback, encoder_wrapper) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
 547                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 548                         return false;
 549                 }
 550         }
 551
 552         if(!convert_to_seek_table(requested_seek_points, num_requested_seek_points, encoder_wrapper->total_samples_to_encode, blocksize, &encoder_wrapper->seek_table)) {
 553                 fprintf(stderr, "ERROR allocating seek table\n");
 554                 return false;
 555         }
 556
 557         if(encoder_wrapper->verbose && encoder_wrapper->seek_table.num_points > 0) {
 558                 if(encoder_wrapper->total_samples_to_encode > 0)
 559                         printf("seek points (%llu total samples):", encoder_wrapper->total_samples_to_encode);
 560                 else
 561                         printf("seek points (total samples unknown):");
 562                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
 563                         if(encoder_wrapper->seek_table.points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
 564                                 printf(" %llu", encoder_wrapper->seek_table.points[i].sample_number);
 565                         else
 566                                 printf(" X");
 567                 }
 568                 printf("\n");
 569         }
 570
 571         encoder_wrapper->encoder->streamable_subset = !lax;
 572         encoder_wrapper->encoder->channels = channels;
 573         encoder_wrapper->encoder->bits_per_sample = bps;
 574         encoder_wrapper->encoder->sample_rate = sample_rate;
 575         encoder_wrapper->encoder->blocksize = blocksize;
 576         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 577         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 578         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 579         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
 580         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 581         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 582         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 583         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 584         encoder_wrapper->encoder->seek_table = (encoder_wrapper->seek_table.num_points > 0)? &encoder_wrapper->seek_table : 0;
 585         encoder_wrapper->encoder->padding = padding;
 586
 587         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 588                 fprintf(stderr, "ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->encoder->state, FLAC__EncoderStateString[encoder_wrapper->encoder->state]);
 589                 return false;
 590         }
 591
 592         /* the above call write all the metadata, so we save the stream offset now */
 593         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
 594
 595         return true;
 596 }
 597
 598 bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table)
 599 {
 600         unsigned i, j, real_points, placeholders;
 601         char *pt = requested_seek_points, *q;
 602         bool first;
 603
 604         seek_table->num_points = 0;
 605
 606         if(num_requested_seek_points == 0)
 607                 return true;
 608
 609         if(num_requested_seek_points < 0) {
 610                 strcpy(requested_seek_points, "100x<");
 611                 num_requested_seek_points = 1;
 612         }
 613
 614         /* first count how many individual seek point we may need */
 615         real_points = placeholders = 0;
 616         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 617                 q = strchr(pt, '<');
 618                 assert(0 != q);
 619                 *q = '\0';
 620
 621                 if(0 == strcmp(pt, "X")) { /* -S X */
 622                         placeholders++;
 623                 }
 624                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 625                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
 626                                 real_points += (unsigned)atoi(pt);
 627                 }
 628                 else { /* -S # */
 629                         real_points++;
 630                 }
 631                 *q++ = '<';
 632
 633                 pt = q;
 634         }
 635         pt = requested_seek_points;
 636
 637         /* make some space */
 638         if(0 == (seek_table->points = (FLAC__StreamMetaData_SeekPoint*)malloc(sizeof(FLAC__StreamMetaData_SeekPoint) * (real_points+placeholders))))
 639                 return false;
 640
 641         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
 642         for(i = 0; i < real_points+placeholders; i++) {
 643                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 644                 seek_table->points[i].stream_offset = 0;
 645                 seek_table->points[i].frame_samples = 0;
 646         }
 647
 648         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 649                 q = strchr(pt, '<');
 650                 assert(0 != q);
 651                 *q++ = '\0';
 652
 653                 if(0 == strcmp(pt, "X")) { /* -S X */
 654                         ; /* we append placeholders later */
 655                 }
 656                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 657                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
 658                                 unsigned j, n;
 659                                 n = (unsigned)atoi(pt);
 660                                 for(j = 0; j < n; j++)
 661                                         append_point_to_seek_table(seek_table, stream_samples * (uint64)j / (uint64)n, stream_samples, blocksize);
 662                         }
 663                 }
 664                 else { /* -S # */
 665                         append_point_to_seek_table(seek_table, (uint64)atoi(pt), stream_samples, blocksize);
 666                 }
 667
 668                 pt = q;
 669         }
 670
 671         /* sort the seekpoints */
 672         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetaData_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
 673
 674         /* uniqify the seekpoints */
 675         first = false;
 676         for(i = j = 0; i < seek_table->num_points; i++) {
 677                 if(!first) {
 678                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
 679                                 continue;
 680                 }
 681                 first = false;
 682                 seek_table->points[j++] = seek_table->points[i];
 683         }
 684         seek_table->num_points = j;
 685
 686         /* append placeholders */
 687         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
 688                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 689         seek_table->num_points += placeholders;
 690
 691         return true;
 692 }
 693
 694 void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize)
 695 {
 696         const uint64 target_sample = (sample / blocksize) * blocksize;
 697
 698         if(stream_samples == 0 || target_sample < stream_samples)
 699                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
 700 }
 701
 702 int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r)
 703 {
 704         /* we don't just 'return l->sample_number - r->sample_number' since the result (int64) might overflow an 'int' */
 705         if(l->sample_number == r->sample_number)
 706                 return 0;
 707         else if(l->sample_number < r->sample_number)
 708                 return -1;
 709         else
 710                 return 1;
 711 }
 712
 713 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 714 {
 715         unsigned wide_sample, sample, channel, byte;
 716
 717         if(bps == 8) {
 718                 if(is_unsigned_samples) {
 719                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 720                                 for(channel = 0; channel < channels; channel++, sample++)
 721                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 0x80;
 722                 }
 723                 else {
 724                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 725                                 for(channel = 0; channel < channels; channel++, sample++)
 726                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 727                 }
 728         }
 729         else if(bps == 16) {
 730                 if(is_big_endian != is_big_endian_host) {
 731                         unsigned char tmp;
 732                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 733                         for(byte = 0; byte < bytes; byte += 2) {
 734                                 tmp = ucbuffer[byte];
 735                                 ucbuffer[byte] = ucbuffer[byte+1];
 736                                 ucbuffer[byte+1] = tmp;
 737                         }
 738                 }
 739                 if(is_unsigned_samples) {
 740                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 741                                 for(channel = 0; channel < channels; channel++, sample++)
 742                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 0x8000;
 743                 }
 744                 else {
 745                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 746                                 for(channel = 0; channel < channels; channel++, sample++)
 747                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 748                 }
 749         }
 750         else if(bps == 24) {
 751                 if(!is_big_endian) {
 752                         unsigned char tmp;
 753                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 754                         for(byte = 0; byte < bytes; byte += 3) {
 755                                 tmp = ucbuffer[byte];
 756                                 ucbuffer[byte] = ucbuffer[byte+2];
 757                                 ucbuffer[byte+2] = tmp;
 758                         }
 759                 }
 760                 if(is_unsigned_samples) {
 761                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 762                                 for(channel = 0; channel < channels; channel++, sample++) {
 763                                         input[channel][wide_sample]  = ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 764                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 765                                         input[channel][wide_sample] |= ucbuffer[byte++];
 766                                         input[channel][wide_sample] -= 0x800000;
 767                                 }
 768                 }
 769                 else {
 770                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 771                                 for(channel = 0; channel < channels; channel++, sample++) {
 772                                         input[channel][wide_sample]  = scbuffer[byte++]; input[channel][wide_sample] <<= 8;
 773                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 774                                         input[channel][wide_sample] |= ucbuffer[byte++];
 775                                 }
 776                 }
 777         }
 778         else {
 779                 assert(0);
 780         }
 781
 782         if(encoder_wrapper->verify) {
 783                 for(channel = 0; channel < channels; channel++)
 784                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 785                 encoder_wrapper->verify_fifo.tail += wide_samples;
 786                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 787         }
 788 }
 789
 790 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 791 {
 792         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 793         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 794
 795         /* 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) */
 796         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
 797                 uint64 current_sample = (uint64)current_frame * (uint64)encoder->blocksize, test_sample;
 798                 unsigned i;
 799                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
 800                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
 801                         if(test_sample > current_sample) {
 802                                 break;
 803                         }
 804                         else if(test_sample == current_sample) {
 805                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
 806                                 encoder_wrapper->seek_table.points[i].frame_samples = encoder->blocksize;
 807                                 encoder_wrapper->first_seek_point_to_check++;
 808                                 break;
 809                         }
 810                         else {
 811                                 encoder_wrapper->first_seek_point_to_check++;
 812                         }
 813                 }
 814         }
 815
 816         encoder_wrapper->bytes_written += bytes;
 817         encoder_wrapper->samples_written += samples;
 818         encoder_wrapper->current_frame = current_frame;
 819
 820         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 821                 print_stats(encoder_wrapper);
 822
 823         if(encoder_wrapper->verify) {
 824                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 825                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 826                 if(encoder_wrapper->verify_fifo.into_frames) {
 827                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 828                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 829                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 830                         }
 831                 }
 832                 else {
 833                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 834                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 835                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 836                         }
 837                 }
 838         }
 839
 840         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 841                 return FLAC__ENCODER_WRITE_OK;
 842         else
 843                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 844 }
 845
 846 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 847 {
 848         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 849         byte b;
 850         FILE *f;
 851         const uint64 samples = metadata->data.stream_info.total_samples;
 852         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
 853         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
 854
 855         assert(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
 856
 857         /*
 858          * we get called by the encoder when the encoding process has
 859          * finished so that we can update the STREAMINFO and SEEKTABLE
 860          * blocks.
 861          */
 862
 863         (void)encoder; /* silence compiler warning about unused parameter */
 864
 865         if(encoder_wrapper->fout == stdout)
 866                 return;
 867
 868         fclose(encoder_wrapper->fout);
 869         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 870                 return;
 871
 872         /* all this is based on intimate knowledge of the stream header
 873          * layout, but a change to the header format that would break this
 874          * would also break all streams encoded in the previous format.
 875          */
 876
 877         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 878         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
 879
 880 samples_:
 881         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 882         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 883         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 884         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 885         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 886         b = (byte)((samples >> 24) & 0xFF);
 887         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 888         b = (byte)((samples >> 16) & 0xFF);
 889         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 890         b = (byte)((samples >> 8) & 0xFF);
 891         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 892         b = (byte)(samples & 0xFF);
 893         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 894
 895 framesize_:
 896         if(-1 == fseek(f, 12, SEEK_SET)) goto seektable_;
 897         b = (byte)((min_framesize >> 16) & 0xFF);
 898         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 899         b = (byte)((min_framesize >> 8) & 0xFF);
 900         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 901         b = (byte)(min_framesize & 0xFF);
 902         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 903         b = (byte)((max_framesize >> 16) & 0xFF);
 904         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 905         b = (byte)((max_framesize >> 8) & 0xFF);
 906         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 907         b = (byte)(max_framesize & 0xFF);
 908         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 909
 910 seektable_:
 911         if(encoder_wrapper->seek_table.num_points > 0) {
 912                 long pos;
 913                 unsigned i;
 914
 915                 /* convert any unused seek points to placeholders */
 916                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
 917                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
 918                                 break;
 919                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
 920                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 921                 }
 922
 923                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
 924                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
 925                 pos += metadata->length;
 926                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
 927                 if(-1 == fseek(f, pos, SEEK_SET)) goto end_;
 928                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
 929                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
 930                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
 931                         if(!write_big_endian_uint16(f, encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
 932                 }
 933         }
 934
 935 end_:
 936         fclose(f);
 937         return;
 938 }
 939
 940 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 941 {
 942         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 943         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 944         (void)decoder;
 945
 946         if(encoded_bytes <= *bytes) {
 947                 *bytes = encoded_bytes;
 948                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 949         }
 950         else {
 951                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 952                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
 953                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
 954         }
 955
 956         return FLAC__STREAM_DECODER_READ_CONTINUE;
 957 }
 958
 959 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
 960 {
 961         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 962         unsigned channel, l, r;
 963
 964         for(channel = 0; channel < decoder->channels; channel++) {
 965                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 966                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 967                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 968                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 969                 }
 970         }
 971         /* dequeue the frame from the fifo */
 972         for(channel = 0; channel < decoder->channels; channel++) {
 973                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 974                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 975                 }
 976         }
 977         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
 978         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 979 }
 980
 981 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 982 {
 983         (void)decoder;
 984         (void)metadata;
 985         (void)client_data;
 986 }
 987
 988 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 989 {
 990         (void)decoder;
 991         (void)client_data;
 992         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 993 }
 994
 995 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 996 {
 997 #ifdef _MSC_VER
 998         /* with VC++ you have to spoon feed it the casting */
 999         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
1000 #else
1001         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1002 #endif
1003         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
1004                 progress * 100.0, encoder_wrapper->current_frame,
1005                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
1006 #ifdef _MSC_VER
1007                 /* with VC++ you have to spoon feed it the casting */
1008                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
1009 #else
1010                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
1011 #endif
1012         );
1013         fflush(stdout);
1014 }
1015
1016 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
1017 {
1018         size_t bytes_read = fread(val, 1, 2, f);
1019
1020         if(bytes_read == 0) {
1021                 if(!eof_ok) {
1022                         fprintf(stderr, "ERROR: unexpected EOF\n");
1023                         return false;
1024                 }
1025                 else
1026                         return true;
1027         }
1028         else if(bytes_read < 2) {
1029                 fprintf(stderr, "ERROR: unexpected EOF\n");
1030                 return false;
1031         }
1032         else {
1033                 if(is_big_endian_host) {
1034                         byte tmp, *b = (byte*)val;
1035                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1036                 }
1037                 return true;
1038         }
1039 }
1040
1041 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
1042 {
1043         size_t bytes_read = fread(val, 1, 4, f);
1044
1045         if(bytes_read == 0) {
1046                 if(!eof_ok) {
1047                         fprintf(stderr, "ERROR: unexpected EOF\n");
1048                         return false;
1049                 }
1050                 else
1051                         return true;
1052         }
1053         else if(bytes_read < 4) {
1054                 fprintf(stderr, "ERROR: unexpected EOF\n");
1055                 return false;
1056         }
1057         else {
1058                 if(is_big_endian_host) {
1059                         byte tmp, *b = (byte*)val;
1060                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1061                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1062                 }
1063                 return true;
1064         }
1065 }
1066
1067 bool write_big_endian_uint16(FILE *f, uint16 val)
1068 {
1069         if(!is_big_endian_host) {
1070                 byte *b = (byte *)&val, tmp;
1071                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1072         }
1073         return fwrite(&val, 1, 2, f) == 2;
1074 }
1075
1076 bool write_big_endian_uint64(FILE *f, uint64 val)
1077 {
1078         if(!is_big_endian_host) {
1079                 byte *b = (byte *)&val, tmp;
1080                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1081                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1082                 tmp = b[2]; b[2] = b[5]; b[3] = tmp;
1083                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1084         }
1085         return fwrite(&val, 1, 8, f) == 8;
1086 }