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         unsigned current_frame;
  76         verify_fifo_struct verify_fifo;
  77 } encoder_wrapper_struct;
  78
  79 static bool is_big_endian_host;
  80
  81 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
  82 static signed char *scbuffer = (signed char *)ucbuffer;
  83 static uint16 *usbuffer = (uint16 *)ucbuffer;
  84 static int16 *ssbuffer = (int16 *)ucbuffer;
  85
  86 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  87 static int32 *input[FLAC__MAX_CHANNELS];
  88
  89 /* local routines */
  90 static bool init(encoder_wrapper_struct *encoder_wrapper);
  91 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, encoder_wrapper_struct *encoder_wrapper);
  92 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  93 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  94 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
  95 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
  96 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
  97 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
  98 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  99 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
 100 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
 101 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
 102
 103 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)
 104 {
 105         encoder_wrapper_struct encoder_wrapper;
 106         FILE *fin;
 107         bool is_unsigned_samples;
 108         unsigned channels, bps, sample_rate, data_bytes;
 109         size_t bytes_per_wide_sample, bytes_read;
 110         uint16 x;
 111         uint32 xx;
 112
 113         encoder_wrapper.encoder = 0;
 114         encoder_wrapper.verify = verify;
 115         encoder_wrapper.verbose = verbose;
 116         encoder_wrapper.bytes_written = 0;
 117         encoder_wrapper.samples_written = 0;
 118         encoder_wrapper.outfile = outfile;
 119
 120         if(0 == strcmp(infile, "-")) {
 121                 fin = stdin;
 122         }
 123         else {
 124                 if(0 == (fin = fopen(infile, "rb"))) {
 125                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 126                         return false;
 127                 }
 128         }
 129         if(0 == strcmp(outfile, "-")) {
 130                 encoder_wrapper.fout = stdout;
 131         }
 132         else {
 133                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 134                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 135                         fclose(fin);
 136                         return false;
 137                 }
 138         }
 139
 140         if(!init(&encoder_wrapper))
 141                 goto wav_abort_;
 142
 143         /*
 144          * check the RIFF chunk
 145          */
 146         if(!read_little_endian_uint32(fin, &xx, false))
 147                 goto wav_abort_;
 148         if(xx != 0x46464952) { /* "RIFF" */
 149                 fprintf(stderr, "ERROR: no RIFF header\n");
 150                 goto wav_abort_;
 151         }
 152         if(!read_little_endian_uint32(fin, &xx, false))
 153                 goto wav_abort_;
 154
 155         /*
 156          * now process the WAVE chunk
 157          */
 158         if(!read_little_endian_uint32(fin, &xx, true))
 159                 goto wav_end_;
 160         if(xx != 0x45564157) { /* "WAVE" */
 161                 fprintf(stderr, "ERROR: no WAVE header\n");
 162                 goto wav_abort_;
 163         }
 164
 165         /* do the format sub-chunk */
 166         if(!read_little_endian_uint32(fin, &xx, false))
 167                 goto wav_abort_;
 168         if(xx != 0x20746d66) { /* "fmt " */
 169                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 170                 goto wav_abort_;
 171         }
 172         /* fmt chunk size */
 173         if(!read_little_endian_uint32(fin, &xx, false))
 174                 goto wav_abort_;
 175         if(xx != 16) {
 176                 fprintf(stderr, "ERROR: unsupported chunk\n");
 177                 goto wav_abort_;
 178         }
 179         /* compression code */
 180         if(!read_little_endian_uint16(fin, &x, false))
 181                 goto wav_abort_;
 182         if(x != 1) {
 183                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 184                 goto wav_abort_;
 185         }
 186         /* number of channels */
 187         if(!read_little_endian_uint16(fin, &x, false))
 188                 goto wav_abort_;
 189         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 190                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 191                 goto wav_abort_;
 192         }
 193         channels = x;
 194         /* sample rate */
 195         if(!read_little_endian_uint32(fin, &xx, false))
 196                 goto wav_abort_;
 197         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 198                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 199                 goto wav_abort_;
 200         }
 201         sample_rate = xx;
 202         /* avg bytes per second (ignored) */
 203         if(!read_little_endian_uint32(fin, &xx, false))
 204                 goto wav_abort_;
 205         /* block align (ignored) */
 206         if(!read_little_endian_uint16(fin, &x, false))
 207                 goto wav_abort_;
 208         /* bits per sample */
 209         if(!read_little_endian_uint16(fin, &x, false))
 210                 goto wav_abort_;
 211         if(x != 8 && x != 16) {
 212                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 213                 goto wav_abort_;
 214         }
 215         bps = x;
 216         is_unsigned_samples = (x == 8);
 217
 218         /* do the data sub-chunk */
 219         if(!read_little_endian_uint32(fin, &xx, false))
 220                 goto wav_abort_;
 221         if(xx != 0x61746164) { /* "data" */
 222                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 223                 goto wav_abort_;
 224         }
 225         /* data size */
 226         if(!read_little_endian_uint32(fin, &xx, false))
 227                 goto wav_abort_;
 228         data_bytes = xx;
 229
 230         bytes_per_wide_sample = channels * (bps >> 3);
 231
 232         if(skip > 0) {
 233                 if(fin != stdin) {
 234                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 235                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 236                                 goto wav_abort_;
 237                         }
 238                 }
 239                 else {
 240                         int64 left;
 241                         unsigned need;
 242                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 243                                 need = min(left, CHUNK_OF_SAMPLES);
 244                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 245                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 246                                         goto wav_abort_;
 247                                 }
 248                         }
 249                 }
 250         }
 251
 252         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 253         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 254
 255         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, &encoder_wrapper))
 256                 goto wav_abort_;
 257
 258         encoder_wrapper.verify_fifo.into_frames = true;
 259
 260         while(data_bytes > 0) {
 261                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 262                 if(bytes_read == 0) {
 263                         if(ferror(fin)) {
 264                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 265                                 goto wav_abort_;
 266                         }
 267                         else if(feof(fin))
 268                                 break;
 269                 }
 270                 else {
 271                         if(bytes_read > data_bytes)
 272                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 273                         if(bytes_read % bytes_per_wide_sample != 0) {
 274                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 275                                 goto wav_abort_;
 276                         }
 277                         else {
 278                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 279                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 280                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 281                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 282                                         goto wav_abort_;
 283                                 }
 284                                 data_bytes -= bytes_read;
 285                         }
 286                 }
 287         }
 288
 289 wav_end_:
 290         if(encoder_wrapper.encoder) {
 291                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 292                         FLAC__encoder_finish(encoder_wrapper.encoder);
 293                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 294         }
 295         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 296                 print_stats(&encoder_wrapper);
 297                 printf("\n");
 298         }
 299         if(verify) {
 300                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 301                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 302                         return 1;
 303                 }
 304                 else {
 305                         printf("Verify succeeded\n");
 306                 }
 307         }
 308         fclose(fin);
 309         return 0;
 310 wav_abort_:
 311         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 312                 printf("\n");
 313         if(encoder_wrapper.encoder) {
 314                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 315                         FLAC__encoder_finish(encoder_wrapper.encoder);
 316                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 317         }
 318         if(verify) {
 319                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 320                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 321                         return 1;
 322                 }
 323                 else {
 324                         printf("Verify succeeded\n");
 325                 }
 326         }
 327         fclose(fin);
 328         unlink(outfile);
 329         return 1;
 330 }
 331
 332 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, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 333 {
 334         encoder_wrapper_struct encoder_wrapper;
 335         FILE *fin;
 336         size_t bytes_read;
 337         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 338
 339         encoder_wrapper.encoder = 0;
 340         encoder_wrapper.verify = verify;
 341         encoder_wrapper.verbose = verbose;
 342         encoder_wrapper.bytes_written = 0;
 343         encoder_wrapper.samples_written = 0;
 344         encoder_wrapper.outfile = outfile;
 345
 346         if(0 == strcmp(infile, "-")) {
 347                 fin = stdin;
 348         }
 349         else {
 350                 if(0 == (fin = fopen(infile, "rb"))) {
 351                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 352                         return false;
 353                 }
 354         }
 355         if(0 == strcmp(outfile, "-")) {
 356                 encoder_wrapper.fout = stdout;
 357         }
 358         else {
 359                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 360                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 361                         fclose(fin);
 362                         return false;
 363                 }
 364         }
 365
 366         if(!init(&encoder_wrapper))
 367                 goto raw_abort_;
 368
 369         /* get the file length */
 370         if(0 != fseek(fin, 0, SEEK_END)) {
 371                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 372         }
 373         else {
 374                 long filesize;
 375                 fflush(fin);
 376                 if(-1 == (filesize = ftell(fin))) {
 377                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 378                 }
 379                 else {
 380                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 381                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 382                 }
 383         }
 384
 385         if(skip > 0) {
 386                 if(fin != stdin) {
 387                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 388                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 389                                 goto raw_abort_;
 390                         }
 391                 }
 392                 else {
 393                         int64 left;
 394                         unsigned need;
 395                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 396                                 need = min(left, CHUNK_OF_SAMPLES);
 397                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 398                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 399                                         goto raw_abort_;
 400                                 }
 401                         }
 402                 }
 403         }
 404         else {
 405                 fseek(fin, 0, SEEK_SET);
 406         }
 407
 408         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, &encoder_wrapper))
 409                 goto raw_abort_;
 410
 411         encoder_wrapper.verify_fifo.into_frames = true;
 412
 413         while(!feof(fin)) {
 414                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 415                 if(bytes_read == 0) {
 416                         if(ferror(fin)) {
 417                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 418                                 goto raw_abort_;
 419                         }
 420                 }
 421                 else if(bytes_read % bytes_per_wide_sample != 0) {
 422                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 423                         goto raw_abort_;
 424                 }
 425                 else {
 426                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 427                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 428                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 429                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 430                                 goto raw_abort_;
 431                         }
 432                 }
 433         }
 434
 435         if(encoder_wrapper.encoder) {
 436                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 437                         FLAC__encoder_finish(encoder_wrapper.encoder);
 438                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 439         }
 440         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 441                 print_stats(&encoder_wrapper);
 442                 printf("\n");
 443         }
 444         if(verify) {
 445                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 446                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 447                         return 1;
 448                 }
 449                 else {
 450                         printf("Verify succeeded\n");
 451                 }
 452         }
 453         fclose(fin);
 454         return 0;
 455 raw_abort_:
 456         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 457                 printf("\n");
 458         if(encoder_wrapper.encoder) {
 459                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 460                         FLAC__encoder_finish(encoder_wrapper.encoder);
 461                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 462         }
 463         if(verify) {
 464                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 465                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
 466                         return 1;
 467                 }
 468                 else {
 469                         printf("Verify succeeded\n");
 470                 }
 471         }
 472         fclose(fin);
 473         unlink(outfile);
 474         return 1;
 475 }
 476
 477 bool init(encoder_wrapper_struct *encoder_wrapper)
 478 {
 479         unsigned i;
 480         uint32 test = 1;
 481
 482         is_big_endian_host = (*((byte*)(&test)))? false : true;
 483
 484         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 485                 input[i] = &(in[i][0]);
 486
 487         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 488         if(0 == encoder_wrapper->encoder) {
 489                 fprintf(stderr, "ERROR creating the encoder instance\n");
 490                 return false;
 491         }
 492
 493         return true;
 494 }
 495
 496 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, encoder_wrapper_struct *encoder_wrapper)
 497 {
 498         if(channels != 2)
 499                 do_mid_side = loose_mid_side = false;
 500
 501         if(encoder_wrapper->verify) {
 502                 unsigned i;
 503
 504                 /* set up the fifo which will hold the original signal to compare against */
 505                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 506                 for(i = 0; i < channels; i++) {
 507                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 508                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 509                                 return false;
 510                         }
 511                 }
 512                 encoder_wrapper->verify_fifo.tail = 0;
 513                 encoder_wrapper->verify_fifo.into_frames = false;
 514                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 515
 516                 /* set up a stream decoder for verification */
 517                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 518                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 519                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 520                         return false;
 521                 }
 522                 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) {
 523                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 524                         return false;
 525                 }
 526         }
 527
 528         encoder_wrapper->encoder->streamable_subset = !lax;
 529         encoder_wrapper->encoder->channels = channels;
 530         encoder_wrapper->encoder->bits_per_sample = bps;
 531         encoder_wrapper->encoder->sample_rate = sample_rate;
 532         encoder_wrapper->encoder->blocksize = blocksize;
 533         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 534         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 535         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 536         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
 537         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 538         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 539         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 540         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 541         encoder_wrapper->encoder->padding = padding;
 542
 543         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 544                 fprintf(stderr, "ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->encoder->state, FLAC__EncoderStateString[encoder_wrapper->encoder->state]);
 545                 return false;
 546         }
 547
 548         return true;
 549 }
 550
 551 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 552 {
 553         unsigned wide_sample, sample, channel, byte;
 554
 555         if(bps == 8) {
 556                 if(is_unsigned_samples) {
 557                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 558                                 for(channel = 0; channel < channels; channel++, sample++)
 559                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 0x80;
 560                 }
 561                 else {
 562                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 563                                 for(channel = 0; channel < channels; channel++, sample++)
 564                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 565                 }
 566         }
 567         else if(bps == 16) {
 568                 if(is_big_endian != is_big_endian_host) {
 569                         unsigned char tmp;
 570                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 571                         for(byte = 0; byte < bytes; byte += 2) {
 572                                 tmp = ucbuffer[byte];
 573                                 ucbuffer[byte] = ucbuffer[byte+1];
 574                                 ucbuffer[byte+1] = tmp;
 575                         }
 576                 }
 577                 if(is_unsigned_samples) {
 578                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 579                                 for(channel = 0; channel < channels; channel++, sample++)
 580                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 0x8000;
 581                 }
 582                 else {
 583                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 584                                 for(channel = 0; channel < channels; channel++, sample++)
 585                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 586                 }
 587         }
 588         else if(bps == 24) {
 589                 if(!is_big_endian) {
 590                         unsigned char tmp;
 591                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 592                         for(byte = 0; byte < bytes; byte += 3) {
 593                                 tmp = ucbuffer[byte];
 594                                 ucbuffer[byte] = ucbuffer[byte+2];
 595                                 ucbuffer[byte+2] = tmp;
 596                         }
 597                 }
 598                 if(is_unsigned_samples) {
 599                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 600                                 for(channel = 0; channel < channels; channel++, sample++) {
 601                                         input[channel][wide_sample]  = ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 602                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 603                                         input[channel][wide_sample] |= ucbuffer[byte++];
 604                                         input[channel][wide_sample] -= 0x800000;
 605                                 }
 606                 }
 607                 else {
 608                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 609                                 for(channel = 0; channel < channels; channel++, sample++) {
 610                                         input[channel][wide_sample]  = scbuffer[byte++]; input[channel][wide_sample] <<= 8;
 611                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 612                                         input[channel][wide_sample] |= ucbuffer[byte++];
 613                                 }
 614                 }
 615         }
 616         else {
 617                 assert(0);
 618         }
 619
 620         if(encoder_wrapper->verify) {
 621                 for(channel = 0; channel < channels; channel++)
 622                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 623                 encoder_wrapper->verify_fifo.tail += wide_samples;
 624                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 625         }
 626 }
 627
 628 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 629 {
 630         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 631         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 632
 633         encoder_wrapper->bytes_written += bytes;
 634         encoder_wrapper->samples_written += samples;
 635         encoder_wrapper->current_frame = current_frame;
 636
 637         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 638                 print_stats(encoder_wrapper);
 639
 640         if(encoder_wrapper->verify) {
 641                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 642                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 643                 if(encoder_wrapper->verify_fifo.into_frames) {
 644                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 645                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 646                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 647                         }
 648                 }
 649                 else {
 650                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 651                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 652                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 653                         }
 654                 }
 655         }
 656
 657         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 658                 return FLAC__ENCODER_WRITE_OK;
 659         else
 660                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 661 }
 662
 663 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 664 {
 665         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 666         byte b;
 667         FILE *f;
 668         const uint64 samples = metadata->data.stream_info.total_samples;
 669         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
 670         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
 671
 672         (void)encoder; /* silence compiler warning about unused parameter */
 673
 674         if(encoder_wrapper->fout == stdout)
 675                 return;
 676
 677         fclose(encoder_wrapper->fout);
 678         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 679                 return;
 680
 681         /* all this is based on intimate knowledge of the stream header
 682          * layout, but a change to the header format that would break this
 683          * would also break all streams encoded in the previous format.
 684          */
 685
 686         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 687         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
 688
 689 samples_:
 690         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 691         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 692         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 693         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 694         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 695         b = (byte)((samples >> 24) & 0xFF);
 696         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 697         b = (byte)((samples >> 16) & 0xFF);
 698         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 699         b = (byte)((samples >> 8) & 0xFF);
 700         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 701         b = (byte)(samples & 0xFF);
 702         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 703
 704 framesize_:
 705         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 706         b = (byte)((min_framesize >> 16) & 0xFF);
 707         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 708         b = (byte)((min_framesize >> 8) & 0xFF);
 709         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 710         b = (byte)(min_framesize & 0xFF);
 711         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 712         b = (byte)((max_framesize >> 16) & 0xFF);
 713         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 714         b = (byte)((max_framesize >> 8) & 0xFF);
 715         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 716         b = (byte)(max_framesize & 0xFF);
 717         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 718 end_:
 719         fclose(f);
 720         return;
 721 }
 722
 723 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 724 {
 725         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 726         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 727         (void)decoder;
 728
 729         if(encoded_bytes <= *bytes) {
 730                 *bytes = encoded_bytes;
 731                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 732         }
 733         else {
 734                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 735                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
 736                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
 737         }
 738
 739         return FLAC__STREAM_DECODER_READ_CONTINUE;
 740 }
 741
 742 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
 743 {
 744         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 745         unsigned channel, l, r;
 746
 747         for(channel = 0; channel < decoder->channels; channel++) {
 748                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 749                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 750                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 751                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 752                 }
 753         }
 754         /* dequeue the frame from the fifo */
 755         for(channel = 0; channel < decoder->channels; channel++) {
 756                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 757                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 758                 }
 759         }
 760         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
 761         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 762 }
 763
 764 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 765 {
 766         (void)decoder;
 767         (void)metadata;
 768         (void)client_data;
 769 }
 770
 771 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 772 {
 773         (void)decoder;
 774         (void)client_data;
 775         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 776 }
 777
 778 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 779 {
 780 #ifdef _MSC_VER
 781         /* with VC++ you have to spoon feed it the casting */
 782         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 783 #else
 784         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 785 #endif
 786         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 787                 progress * 100.0, encoder_wrapper->current_frame,
 788                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 789 #ifdef _MSC_VER
 790                 /* with VC++ you have to spoon feed it the casting */
 791                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 792 #else
 793                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 794 #endif
 795         );
 796         fflush(stdout);
 797 }
 798
 799 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 800 {
 801         size_t bytes_read = fread(val, 1, 2, f);
 802
 803         if(bytes_read == 0) {
 804                 if(!eof_ok) {
 805                         fprintf(stderr, "ERROR: unexpected EOF\n");
 806                         return false;
 807                 }
 808                 else
 809                         return true;
 810         }
 811         else if(bytes_read < 2) {
 812                 fprintf(stderr, "ERROR: unexpected EOF\n");
 813                 return false;
 814         }
 815         else {
 816                 if(is_big_endian_host) {
 817                         byte tmp, *b = (byte*)val;
 818                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 819                 }
 820                 return true;
 821         }
 822 }
 823
 824 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 825 {
 826         size_t bytes_read = fread(val, 1, 4, f);
 827
 828         if(bytes_read == 0) {
 829                 if(!eof_ok) {
 830                         fprintf(stderr, "ERROR: unexpected EOF\n");
 831                         return false;
 832                 }
 833                 else
 834                         return true;
 835         }
 836         else if(bytes_read < 4) {
 837                 fprintf(stderr, "ERROR: unexpected EOF\n");
 838                 return false;
 839         }
 840         else {
 841                 if(is_big_endian_host) {
 842                         byte tmp, *b = (byte*)val;
 843                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 844                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 845                 }
 846                 return true;
 847         }
 848 }