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