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 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__FrameHeader *header, 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 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, 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 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, 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 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 = 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->do_exhaustive_model_search = do_exhaustive_model_search;
 527         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 528         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 529         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 530
 531         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 532                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
 533                 return false;
 534         }
 535
 536         return true;
 537 }
 538
 539 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 540 {
 541         unsigned wide_sample, sample, channel, byte;
 542
 543         if(bps == 8) {
 544                 if(is_unsigned_samples) {
 545                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 546                                 for(channel = 0; channel < channels; channel++, sample++)
 547                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
 548                 }
 549                 else {
 550                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 551                                 for(channel = 0; channel < channels; channel++, sample++)
 552                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 553                 }
 554         }
 555         else {
 556                 if(is_big_endian != is_big_endian_host) {
 557                         unsigned char tmp;
 558                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 559                         for(byte = 0; byte < bytes; byte += 2) {
 560                                 tmp = ucbuffer[byte];
 561                                 ucbuffer[byte] = ucbuffer[byte+1];
 562                                 ucbuffer[byte+1] = tmp;
 563                         }
 564                 }
 565                 if(is_unsigned_samples) {
 566                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 567                                 for(channel = 0; channel < channels; channel++, sample++)
 568                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
 569                 }
 570                 else {
 571                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 572                                 for(channel = 0; channel < channels; channel++, sample++)
 573                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 574                 }
 575         }
 576
 577         if(encoder_wrapper->verify) {
 578                 for(channel = 0; channel < channels; channel++)
 579                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 580                 encoder_wrapper->verify_fifo.tail += wide_samples;
 581                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 582         }
 583 }
 584
 585 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 586 {
 587         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 588         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 589
 590         encoder_wrapper->bytes_written += bytes;
 591         encoder_wrapper->samples_written += samples;
 592         encoder_wrapper->current_frame = current_frame;
 593
 594         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 595                 print_stats(encoder_wrapper);
 596
 597         if(encoder_wrapper->verify) {
 598                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 599                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 600                 if(encoder_wrapper->verify_fifo.into_frames) {
 601                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 602                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 603                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 604                         }
 605                 }
 606                 else {
 607                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 608                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 609                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 610                         }
 611                 }
 612         }
 613
 614         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 615                 return FLAC__ENCODER_WRITE_OK;
 616         else
 617                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 618 }
 619
 620 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 621 {
 622         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 623         byte b;
 624         FILE *f;
 625         const uint64 samples = metadata->data.encoding.total_samples;
 626         const unsigned min_framesize = metadata->data.encoding.min_framesize;
 627         const unsigned max_framesize = metadata->data.encoding.max_framesize;
 628
 629         (void)encoder; /* silence compiler warning about unused parameter */
 630
 631         if(encoder_wrapper->fout == stdout)
 632                 return;
 633
 634         fclose(encoder_wrapper->fout);
 635         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 636                 return;
 637
 638         /* all this is based on intimate knowledge of the stream header
 639          * layout, but a change to the header format that would break this
 640          * would also break all streams encoded in the previous format.
 641          */
 642
 643         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 644         fwrite(metadata->data.encoding.md5sum, 1, 16, f);
 645
 646 samples_:
 647         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 648         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 649         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 650         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 651         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 652         b = (byte)((samples >> 24) & 0xFF);
 653         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 654         b = (byte)((samples >> 16) & 0xFF);
 655         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 656         b = (byte)((samples >> 8) & 0xFF);
 657         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 658         b = (byte)(samples & 0xFF);
 659         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 660
 661 framesize_:
 662         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 663         b = (byte)((min_framesize >> 16) & 0xFF);
 664         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 665         b = (byte)((min_framesize >> 8) & 0xFF);
 666         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 667         b = (byte)(min_framesize & 0xFF);
 668         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 669         b = (byte)((max_framesize >> 16) & 0xFF);
 670         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 671         b = (byte)((max_framesize >> 8) & 0xFF);
 672         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 673         b = (byte)(max_framesize & 0xFF);
 674         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 675 end_:
 676         fclose(encoder_wrapper->fout);
 677         return;
 678 }
 679
 680 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 681 {
 682         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 683         (void)decoder;
 684
 685         *bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 686         memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 687
 688         return FLAC__STREAM_DECODER_READ_CONTINUE;
 689 }
 690
 691 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
 692 {
 693         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 694         unsigned channel, l, r;
 695
 696         for(channel = 0; channel < decoder->channels; channel++) {
 697                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 698                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 699                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 700                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 701                 }
 702         }
 703         /* dequeue the frame from the fifo */
 704         for(channel = 0; channel < decoder->channels; channel++) {
 705                 for(l = 0, r = header->blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 706                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 707                 }
 708         }
 709         encoder_wrapper->verify_fifo.tail -= header->blocksize;
 710         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 711 }
 712
 713 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 714 {
 715         (void)decoder;
 716         (void)metadata;
 717         (void)client_data;
 718 }
 719
 720 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 721 {
 722         (void)decoder;
 723         (void)client_data;
 724         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 725 }
 726
 727 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 728 {
 729 #ifdef _MSC_VER
 730         /* with VC++ you have to spoon feed it the casting */
 731         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 732 #else
 733         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 734 #endif
 735         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 736                 progress * 100.0, encoder_wrapper->current_frame,
 737                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 738 #ifdef _MSC_VER
 739                 /* with VC++ you have to spoon feed it the casting */
 740                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 741 #else
 742                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 743 #endif
 744         );
 745         fflush(stdout);
 746 }
 747
 748 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 749 {
 750         size_t bytes_read = fread(val, 1, 2, f);
 751
 752         if(bytes_read == 0) {
 753                 if(!eof_ok) {
 754                         fprintf(stderr, "ERROR: unexpected EOF\n");
 755                         return false;
 756                 }
 757                 else
 758                         return true;
 759         }
 760         else if(bytes_read < 2) {
 761                 fprintf(stderr, "ERROR: unexpected EOF\n");
 762                 return false;
 763         }
 764         else {
 765                 if(is_big_endian_host) {
 766                         byte tmp, *b = (byte*)val;
 767                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 768                 }
 769                 return true;
 770         }
 771 }
 772
 773 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 774 {
 775         size_t bytes_read = fread(val, 1, 4, f);
 776
 777         if(bytes_read == 0) {
 778                 if(!eof_ok) {
 779                         fprintf(stderr, "ERROR: unexpected EOF\n");
 780                         return false;
 781                 }
 782                 else
 783                         return true;
 784         }
 785         else if(bytes_read < 4) {
 786                 fprintf(stderr, "ERROR: unexpected EOF\n");
 787                 return false;
 788         }
 789         else {
 790                 if(is_big_endian_host) {
 791                         byte tmp, *b = (byte*)val;
 792                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 793                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 794                 }
 795                 return true;
 796         }
 797 }