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 typedef struct {
  48         int32 *original[FLAC__MAX_CHANNELS];
  49         unsigned size; /* of each original[] in samples */
  50         unsigned tail; /* in wide samples */
  51         const byte *encoded_signal;
  52         unsigned encoded_bytes;
  53         bool into_frames;
  54         verify_code result;
  55         FLAC__StreamDecoder *decoder;
  56 } verify_fifo_struct;
  57
  58 typedef struct {
  59         FILE *fout;
  60         const char *outfile;
  61         FLAC__Encoder *encoder;
  62         bool verify;
  63         bool verbose;
  64         uint64 unencoded_size;
  65         uint64 total_samples_to_encode;
  66         uint64 bytes_written;
  67         uint64 samples_written;
  68         unsigned current_frame;
  69         verify_fifo_struct verify_fifo;
  70 } encoder_wrapper_struct;
  71
  72 static bool is_big_endian_host;
  73
  74 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
  75 static signed char *scbuffer = (signed char *)ucbuffer;
  76 static uint16 *usbuffer = (uint16 *)ucbuffer;
  77 static int16 *ssbuffer = (int16 *)ucbuffer;
  78
  79 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  80 static int32 *input[FLAC__MAX_CHANNELS];
  81
  82 /* local routines */
  83 static bool init(encoder_wrapper_struct *encoder_wrapper);
  84 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, encoder_wrapper_struct *encoder_wrapper);
  85 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  86 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  87 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
  88 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
  89 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
  90 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
  91 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  92 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
  93 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
  94 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
  95
  96 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)
  97 {
  98         encoder_wrapper_struct encoder_wrapper;
  99         FILE *fin;
 100         bool is_unsigned_samples;
 101         unsigned channels, bps, sample_rate, data_bytes;
 102         size_t bytes_per_wide_sample, bytes_read;
 103         uint16 x;
 104         uint32 xx;
 105
 106         encoder_wrapper.encoder = 0;
 107         encoder_wrapper.verify = verify;
 108         encoder_wrapper.verbose = verbose;
 109         encoder_wrapper.bytes_written = 0;
 110         encoder_wrapper.samples_written = 0;
 111         encoder_wrapper.outfile = outfile;
 112
 113         if(0 == strcmp(infile, "-")) {
 114                 fin = stdin;
 115         }
 116         else {
 117                 if(0 == (fin = fopen(infile, "rb"))) {
 118                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 119                         return false;
 120                 }
 121         }
 122         if(0 == strcmp(outfile, "-")) {
 123                 encoder_wrapper.fout = stdout;
 124         }
 125         else {
 126                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 127                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 128                         fclose(fin);
 129                         return false;
 130                 }
 131         }
 132
 133         if(!init(&encoder_wrapper))
 134                 goto wav_abort_;
 135
 136         /*
 137          * check the RIFF chunk
 138          */
 139         if(!read_little_endian_uint32(fin, &xx, false))
 140                 goto wav_abort_;
 141         if(xx != 0x46464952) { /* "RIFF" */
 142                 fprintf(stderr, "ERROR: no RIFF header\n");
 143                 goto wav_abort_;
 144         }
 145         if(!read_little_endian_uint32(fin, &xx, false))
 146                 goto wav_abort_;
 147
 148         /*
 149          * now process the WAVE chunk
 150          */
 151         if(!read_little_endian_uint32(fin, &xx, true))
 152                 goto wav_end_;
 153         if(xx != 0x45564157) { /* "WAVE" */
 154                 fprintf(stderr, "ERROR: no WAVE header\n");
 155                 goto wav_abort_;
 156         }
 157
 158         /* do the format sub-chunk */
 159         if(!read_little_endian_uint32(fin, &xx, false))
 160                 goto wav_abort_;
 161         if(xx != 0x20746d66) { /* "fmt " */
 162                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 163                 goto wav_abort_;
 164         }
 165         /* fmt chunk size */
 166         if(!read_little_endian_uint32(fin, &xx, false))
 167                 goto wav_abort_;
 168         if(xx != 16) {
 169                 fprintf(stderr, "ERROR: unsupported chunk\n");
 170                 goto wav_abort_;
 171         }
 172         /* compression code */
 173         if(!read_little_endian_uint16(fin, &x, false))
 174                 goto wav_abort_;
 175         if(x != 1) {
 176                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 177                 goto wav_abort_;
 178         }
 179         /* number of channels */
 180         if(!read_little_endian_uint16(fin, &x, false))
 181                 goto wav_abort_;
 182         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 183                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 184                 goto wav_abort_;
 185         }
 186         channels = x;
 187         /* sample rate */
 188         if(!read_little_endian_uint32(fin, &xx, false))
 189                 goto wav_abort_;
 190         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 191                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 192                 goto wav_abort_;
 193         }
 194         sample_rate = xx;
 195         /* avg bytes per second (ignored) */
 196         if(!read_little_endian_uint32(fin, &xx, false))
 197                 goto wav_abort_;
 198         /* block align (ignored) */
 199         if(!read_little_endian_uint16(fin, &x, false))
 200                 goto wav_abort_;
 201         /* bits per sample */
 202         if(!read_little_endian_uint16(fin, &x, false))
 203                 goto wav_abort_;
 204         if(x != 8 && x != 16) {
 205                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 206                 goto wav_abort_;
 207         }
 208         bps = x;
 209         is_unsigned_samples = (x == 8);
 210
 211         /* do the data sub-chunk */
 212         if(!read_little_endian_uint32(fin, &xx, false))
 213                 goto wav_abort_;
 214         if(xx != 0x61746164) { /* "data" */
 215                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 216                 goto wav_abort_;
 217         }
 218         /* data size */
 219         if(!read_little_endian_uint32(fin, &xx, false))
 220                 goto wav_abort_;
 221         data_bytes = xx;
 222
 223         bytes_per_wide_sample = channels * (bps >> 3);
 224
 225         if(skip > 0) {
 226                 if(fin != stdin) {
 227                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 228                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 229                                 goto wav_abort_;
 230                         }
 231                 }
 232                 else {
 233                         int64 left;
 234                         unsigned need;
 235                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 236                                 need = min(left, CHUNK_OF_SAMPLES);
 237                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 238                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 239                                         goto wav_abort_;
 240                                 }
 241                         }
 242                 }
 243         }
 244
 245         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 246         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 247
 248         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, &encoder_wrapper))
 249                 goto wav_abort_;
 250
 251         encoder_wrapper.verify_fifo.into_frames = true;
 252
 253         while(data_bytes > 0) {
 254                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 255                 if(bytes_read == 0) {
 256                         if(ferror(fin)) {
 257                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 258                                 goto wav_abort_;
 259                         }
 260                         else if(feof(fin))
 261                                 break;
 262                 }
 263                 else {
 264                         if(bytes_read > data_bytes)
 265                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 266                         if(bytes_read % bytes_per_wide_sample != 0) {
 267                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 268                                 goto wav_abort_;
 269                         }
 270                         else {
 271                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 272                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 273                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 274                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 275                                         goto wav_abort_;
 276                                 }
 277                                 data_bytes -= bytes_read;
 278                         }
 279                 }
 280         }
 281
 282 wav_end_:
 283         if(encoder_wrapper.encoder) {
 284                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 285                         FLAC__encoder_finish(encoder_wrapper.encoder);
 286                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 287         }
 288         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 289                 print_stats(&encoder_wrapper);
 290                 printf("\n");
 291         }
 292         if(verify) {
 293                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 294                         printf("Verify FAILED!  Do not use %s\n", outfile);
 295                         return 1;
 296                 }
 297                 else {
 298                         printf("Verify succeeded\n");
 299                 }
 300         }
 301         fclose(fin);
 302         return 0;
 303 wav_abort_:
 304         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 305                 printf("\n");
 306         if(encoder_wrapper.encoder) {
 307                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 308                         FLAC__encoder_finish(encoder_wrapper.encoder);
 309                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 310         }
 311         if(verify) {
 312                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 313                         printf("Verify FAILED!  Do not use %s\n", outfile);
 314                         return 1;
 315                 }
 316                 else {
 317                         printf("Verify succeeded\n");
 318                 }
 319         }
 320         fclose(fin);
 321         unlink(outfile);
 322         return 1;
 323 }
 324
 325 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, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 326 {
 327         encoder_wrapper_struct encoder_wrapper;
 328         FILE *fin;
 329         size_t bytes_read;
 330         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 331
 332         encoder_wrapper.encoder = 0;
 333         encoder_wrapper.verify = verify;
 334         encoder_wrapper.verbose = verbose;
 335         encoder_wrapper.bytes_written = 0;
 336         encoder_wrapper.samples_written = 0;
 337         encoder_wrapper.outfile = outfile;
 338
 339         if(0 == strcmp(infile, "-")) {
 340                 fin = stdin;
 341         }
 342         else {
 343                 if(0 == (fin = fopen(infile, "rb"))) {
 344                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 345                         return false;
 346                 }
 347         }
 348         if(0 == strcmp(outfile, "-")) {
 349                 encoder_wrapper.fout = stdout;
 350         }
 351         else {
 352                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 353                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 354                         fclose(fin);
 355                         return false;
 356                 }
 357         }
 358
 359         if(!init(&encoder_wrapper))
 360                 goto raw_abort_;
 361
 362         /* get the file length */
 363         if(0 != fseek(fin, 0, SEEK_END)) {
 364                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 365         }
 366         else {
 367                 long filesize;
 368                 fflush(fin);
 369                 if(-1 == (filesize = ftell(fin))) {
 370                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 371                 }
 372                 else {
 373                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 374                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 375                 }
 376         }
 377
 378         if(skip > 0) {
 379                 if(fin != stdin) {
 380                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 381                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 382                                 goto raw_abort_;
 383                         }
 384                 }
 385                 else {
 386                         int64 left;
 387                         unsigned need;
 388                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 389                                 need = min(left, CHUNK_OF_SAMPLES);
 390                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 391                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 392                                         goto raw_abort_;
 393                                 }
 394                         }
 395                 }
 396         }
 397
 398         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, &encoder_wrapper))
 399                 goto raw_abort_;
 400
 401         encoder_wrapper.verify_fifo.into_frames = true;
 402
 403         while(!feof(fin)) {
 404                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 405                 if(bytes_read == 0) {
 406                         if(ferror(fin)) {
 407                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 408                                 goto raw_abort_;
 409                         }
 410                 }
 411                 else if(bytes_read % bytes_per_wide_sample != 0) {
 412                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 413                         goto raw_abort_;
 414                 }
 415                 else {
 416                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 417                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 418                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 419                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 420                                 goto raw_abort_;
 421                         }
 422                 }
 423         }
 424
 425         if(encoder_wrapper.encoder) {
 426                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 427                         FLAC__encoder_finish(encoder_wrapper.encoder);
 428                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 429         }
 430         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 431                 print_stats(&encoder_wrapper);
 432                 printf("\n");
 433         }
 434         if(verify) {
 435                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 436                         printf("Verify FAILED!  Do not use %s\n", outfile);
 437                         return 1;
 438                 }
 439                 else {
 440                         printf("Verify succeeded\n");
 441                 }
 442         }
 443         fclose(fin);
 444         return 0;
 445 raw_abort_:
 446         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 447                 printf("\n");
 448         if(encoder_wrapper.encoder) {
 449                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 450                         FLAC__encoder_finish(encoder_wrapper.encoder);
 451                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 452         }
 453         if(verify) {
 454                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 455                         printf("Verify FAILED!  Do not use %s\n", outfile);
 456                         return 1;
 457                 }
 458                 else {
 459                         printf("Verify succeeded\n");
 460                 }
 461         }
 462         fclose(fin);
 463         unlink(outfile);
 464         return 1;
 465 }
 466
 467 bool init(encoder_wrapper_struct *encoder_wrapper)
 468 {
 469         unsigned i;
 470         uint32 test = 1;
 471
 472         is_big_endian_host = (*((byte*)(&test)))? false : true;
 473
 474         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 475                 input[i] = &(in[i][0]);
 476
 477         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 478         if(0 == encoder_wrapper->encoder) {
 479                 fprintf(stderr, "ERROR creating the encoder instance\n");
 480                 return false;
 481         }
 482
 483         return true;
 484 }
 485
 486 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, encoder_wrapper_struct *encoder_wrapper)
 487 {
 488         if(channels != 2 || bps > 16)
 489                 do_mid_side = loose_mid_side = false;
 490
 491         if(encoder_wrapper->verify) {
 492                 unsigned i;
 493
 494                 /* set up the fifo which will hold the original signal to compare against */
 495                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 496                 for(i = 0; i < channels; i++) {
 497                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 498                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 499                                 return false;
 500                         }
 501                 }
 502                 encoder_wrapper->verify_fifo.tail = 0;
 503                 encoder_wrapper->verify_fifo.into_frames = false;
 504                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 505
 506                 /* set up a stream decoder for verification */
 507                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 508                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 509                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 510                         return false;
 511                 }
 512                 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) {
 513                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 514                         return false;
 515                 }
 516         }
 517
 518         encoder_wrapper->encoder->streamable_subset = !lax;
 519         encoder_wrapper->encoder->channels = channels;
 520         encoder_wrapper->encoder->bits_per_sample = bps;
 521         encoder_wrapper->encoder->sample_rate = sample_rate;
 522         encoder_wrapper->encoder->blocksize = blocksize;
 523         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 524         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 525         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 526         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
 527         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 528         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 529         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 530         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 531
 532         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 533                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
 534                 return false;
 535         }
 536
 537         return true;
 538 }
 539
 540 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 541 {
 542         unsigned wide_sample, sample, channel, byte;
 543
 544         if(bps == 8) {
 545                 if(is_unsigned_samples) {
 546                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 547                                 for(channel = 0; channel < channels; channel++, sample++)
 548                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
 549                 }
 550                 else {
 551                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 552                                 for(channel = 0; channel < channels; channel++, sample++)
 553                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 554                 }
 555         }
 556         else {
 557                 if(is_big_endian != is_big_endian_host) {
 558                         unsigned char tmp;
 559                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 560                         for(byte = 0; byte < bytes; byte += 2) {
 561                                 tmp = ucbuffer[byte];
 562                                 ucbuffer[byte] = ucbuffer[byte+1];
 563                                 ucbuffer[byte+1] = tmp;
 564                         }
 565                 }
 566                 if(is_unsigned_samples) {
 567                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 568                                 for(channel = 0; channel < channels; channel++, sample++)
 569                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
 570                 }
 571                 else {
 572                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 573                                 for(channel = 0; channel < channels; channel++, sample++)
 574                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 575                 }
 576         }
 577
 578         if(encoder_wrapper->verify) {
 579                 for(channel = 0; channel < channels; channel++)
 580                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 581                 encoder_wrapper->verify_fifo.tail += wide_samples;
 582                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 583         }
 584 }
 585
 586 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 587 {
 588         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 589         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 590
 591         encoder_wrapper->bytes_written += bytes;
 592         encoder_wrapper->samples_written += samples;
 593         encoder_wrapper->current_frame = current_frame;
 594
 595         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 596                 print_stats(encoder_wrapper);
 597
 598         if(encoder_wrapper->verify) {
 599                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 600                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 601                 if(encoder_wrapper->verify_fifo.into_frames) {
 602                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 603                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 604                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 605                         }
 606                 }
 607                 else {
 608                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 609                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 610                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 611                         }
 612                 }
 613         }
 614
 615         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 616                 return FLAC__ENCODER_WRITE_OK;
 617         else
 618                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 619 }
 620
 621 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 622 {
 623         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 624         byte b;
 625         FILE *f;
 626         const uint64 samples = metadata->data.encoding.total_samples;
 627         const unsigned min_framesize = metadata->data.encoding.min_framesize;
 628         const unsigned max_framesize = metadata->data.encoding.max_framesize;
 629
 630         (void)encoder; /* silence compiler warning about unused parameter */
 631
 632         if(encoder_wrapper->fout == stdout)
 633                 return;
 634
 635         fclose(encoder_wrapper->fout);
 636         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 637                 return;
 638
 639         /* all this is based on intimate knowledge of the stream header
 640          * layout, but a change to the header format that would break this
 641          * would also break all streams encoded in the previous format.
 642          */
 643
 644         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 645         fwrite(metadata->data.encoding.md5sum, 1, 16, f);
 646
 647 samples_:
 648         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 649         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 650         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 651         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 652         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 653         b = (byte)((samples >> 24) & 0xFF);
 654         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 655         b = (byte)((samples >> 16) & 0xFF);
 656         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 657         b = (byte)((samples >> 8) & 0xFF);
 658         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 659         b = (byte)(samples & 0xFF);
 660         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 661
 662 framesize_:
 663         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 664         b = (byte)((min_framesize >> 16) & 0xFF);
 665         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 666         b = (byte)((min_framesize >> 8) & 0xFF);
 667         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 668         b = (byte)(min_framesize & 0xFF);
 669         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 670         b = (byte)((max_framesize >> 16) & 0xFF);
 671         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 672         b = (byte)((max_framesize >> 8) & 0xFF);
 673         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 674         b = (byte)(max_framesize & 0xFF);
 675         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 676 end_:
 677         fclose(encoder_wrapper->fout);
 678         return;
 679 }
 680
 681 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 682 {
 683         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 684         (void)decoder;
 685
 686         *bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 687         memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 688
 689         return FLAC__STREAM_DECODER_READ_CONTINUE;
 690 }
 691
 692 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
 693 {
 694         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 695         unsigned channel, l, r;
 696
 697         for(channel = 0; channel < decoder->channels; channel++) {
 698                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 699                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 700                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 701                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 702                 }
 703         }
 704         /* dequeue the frame from the fifo */
 705         for(channel = 0; channel < decoder->channels; channel++) {
 706                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 707                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 708                 }
 709         }
 710         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
 711         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 712 }
 713
 714 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 715 {
 716         (void)decoder;
 717         (void)metadata;
 718         (void)client_data;
 719 }
 720
 721 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 722 {
 723         (void)decoder;
 724         (void)client_data;
 725         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 726 }
 727
 728 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 729 {
 730 #ifdef _MSC_VER
 731         /* with VC++ you have to spoon feed it the casting */
 732         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 733 #else
 734         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 735 #endif
 736         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 737                 progress * 100.0, encoder_wrapper->current_frame,
 738                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 739 #ifdef _MSC_VER
 740                 /* with VC++ you have to spoon feed it the casting */
 741                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 742 #else
 743                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 744 #endif
 745         );
 746         fflush(stdout);
 747 }
 748
 749 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 750 {
 751         size_t bytes_read = fread(val, 1, 2, f);
 752
 753         if(bytes_read == 0) {
 754                 if(!eof_ok) {
 755                         fprintf(stderr, "ERROR: unexpected EOF\n");
 756                         return false;
 757                 }
 758                 else
 759                         return true;
 760         }
 761         else if(bytes_read < 2) {
 762                 fprintf(stderr, "ERROR: unexpected EOF\n");
 763                 return false;
 764         }
 765         else {
 766                 if(is_big_endian_host) {
 767                         byte tmp, *b = (byte*)val;
 768                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 769                 }
 770                 return true;
 771         }
 772 }
 773
 774 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 775 {
 776         size_t bytes_read = fread(val, 1, 4, f);
 777
 778         if(bytes_read == 0) {
 779                 if(!eof_ok) {
 780                         fprintf(stderr, "ERROR: unexpected EOF\n");
 781                         return false;
 782                 }
 783                 else
 784                         return true;
 785         }
 786         else if(bytes_read < 4) {
 787                 fprintf(stderr, "ERROR: unexpected EOF\n");
 788                 return false;
 789         }
 790         else {
 791                 if(is_big_endian_host) {
 792                         byte tmp, *b = (byte*)val;
 793                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 794                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 795                 }
 796                 return true;
 797         }
 798 }