src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000  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 #define CHUNK_OF_SAMPLES 2048
  35
  36 typedef enum {
  37         FLAC__VERIFY_OK,
  38         FLAC__VERIFY_FAILED_IN_FRAME,
  39         FLAC__VERIFY_FAILED_IN_METADATA
  40 } verify_code;
  41
  42 typedef struct {
  43         int32 *original[FLAC__MAX_CHANNELS];
  44         unsigned size; /* of each original[] in samples */
  45         unsigned tail; /* in wide samples */
  46         const byte *encoded_signal;
  47         unsigned encoded_bytes;
  48         bool into_frames;
  49         verify_code result;
  50         FLAC__StreamDecoder *decoder;
  51 } verify_fifo_struct;
  52
  53 typedef struct {
  54         FILE *fout;
  55         const char *outfile;
  56         FLAC__Encoder *encoder;
  57         bool verify;
  58         bool verbose;
  59         uint64 unencoded_size;
  60         uint64 total_samples_to_encode;
  61         uint64 bytes_written;
  62         uint64 samples_written;
  63         unsigned current_frame;
  64         verify_fifo_struct verify_fifo;
  65 } encoder_wrapper_struct;
  66
  67 static bool is_big_endian_host;
  68
  69 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
  70 static signed char *scbuffer = (signed char *)ucbuffer;
  71 static uint16 *usbuffer = (uint16 *)ucbuffer;
  72 static int16 *ssbuffer = (int16 *)ucbuffer;
  73
  74 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  75 static int32 *input[FLAC__MAX_CHANNELS];
  76
  77 /* local routines */
  78 static bool init(encoder_wrapper_struct *encoder_wrapper);
  79 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);
  80 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  81 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  82 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
  83 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
  84 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data);
  85 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
  86 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  87 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
  88 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
  89 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
  90
  91 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)
  92 {
  93         encoder_wrapper_struct encoder_wrapper;
  94         FILE *fin;
  95         bool is_unsigned_samples;
  96         unsigned channels, bps, sample_rate, data_bytes;
  97         size_t bytes_per_wide_sample, bytes_read;
  98         uint16 x;
  99         uint32 xx;
 100
 101         encoder_wrapper.encoder = 0;
 102         encoder_wrapper.verify = verify;
 103         encoder_wrapper.verbose = verbose;
 104         encoder_wrapper.bytes_written = 0;
 105         encoder_wrapper.samples_written = 0;
 106         encoder_wrapper.outfile = outfile;
 107
 108         if(0 == strcmp(infile, "-")) {
 109                 fin = stdin;
 110         }
 111         else {
 112                 if(0 == (fin = fopen(infile, "rb"))) {
 113                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 114                         return false;
 115                 }
 116         }
 117         if(0 == strcmp(outfile, "-")) {
 118                 encoder_wrapper.fout = stdout;
 119         }
 120         else {
 121                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 122                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 123                         fclose(fin);
 124                         return false;
 125                 }
 126         }
 127
 128         if(!init(&encoder_wrapper))
 129                 goto wav_abort_;
 130
 131         /*
 132          * check the RIFF chunk
 133          */
 134         if(!read_little_endian_uint32(fin, &xx, false))
 135                 goto wav_abort_;
 136         if(xx != 0x46464952) { /* "RIFF" */
 137                 fprintf(stderr, "ERROR: no RIFF header\n");
 138                 goto wav_abort_;
 139         }
 140         if(!read_little_endian_uint32(fin, &xx, false))
 141                 goto wav_abort_;
 142
 143         /*
 144          * now process the WAVE chunk
 145          */
 146         if(!read_little_endian_uint32(fin, &xx, true))
 147                 goto wav_end_;
 148         if(xx != 0x45564157) { /* "WAVE" */
 149                 fprintf(stderr, "ERROR: no WAVE header\n");
 150                 goto wav_abort_;
 151         }
 152
 153         /* do the format sub-chunk */
 154         if(!read_little_endian_uint32(fin, &xx, false))
 155                 goto wav_abort_;
 156         if(xx != 0x20746d66) { /* "fmt " */
 157                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 158                 goto wav_abort_;
 159         }
 160         /* fmt chunk size */
 161         if(!read_little_endian_uint32(fin, &xx, false))
 162                 goto wav_abort_;
 163         if(xx != 16) {
 164                 fprintf(stderr, "ERROR: unsupported chunk\n");
 165                 goto wav_abort_;
 166         }
 167         /* compression code */
 168         if(!read_little_endian_uint16(fin, &x, false))
 169                 goto wav_abort_;
 170         if(x != 1) {
 171                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 172                 goto wav_abort_;
 173         }
 174         /* number of channels */
 175         if(!read_little_endian_uint16(fin, &x, false))
 176                 goto wav_abort_;
 177         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 178                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 179                 goto wav_abort_;
 180         }
 181         channels = x;
 182         /* sample rate */
 183         if(!read_little_endian_uint32(fin, &xx, false))
 184                 goto wav_abort_;
 185         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 186                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 187                 goto wav_abort_;
 188         }
 189         sample_rate = xx;
 190         /* avg bytes per second (ignored) */
 191         if(!read_little_endian_uint32(fin, &xx, false))
 192                 goto wav_abort_;
 193         /* block align (ignored) */
 194         if(!read_little_endian_uint16(fin, &x, false))
 195                 goto wav_abort_;
 196         /* bits per sample */
 197         if(!read_little_endian_uint16(fin, &x, false))
 198                 goto wav_abort_;
 199         if(x != 8 && x != 16) {
 200                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 201                 goto wav_abort_;
 202         }
 203         bps = x;
 204         is_unsigned_samples = (x == 8);
 205
 206         /* do the data sub-chunk */
 207         if(!read_little_endian_uint32(fin, &xx, false))
 208                 goto wav_abort_;
 209         if(xx != 0x61746164) { /* "data" */
 210                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 211                 goto wav_abort_;
 212         }
 213         /* data size */
 214         if(!read_little_endian_uint32(fin, &xx, false))
 215                 goto wav_abort_;
 216         data_bytes = xx;
 217
 218         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))
 219                 goto wav_abort_;
 220
 221         bytes_per_wide_sample = channels * (bps >> 3);
 222
 223         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 224                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 225                 goto wav_abort_;
 226         }
 227
 228         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 229         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 230         encoder_wrapper.verify_fifo.into_frames = true;
 231
 232         while(data_bytes > 0) {
 233                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 234                 if(bytes_read == 0) {
 235                         if(ferror(fin)) {
 236                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 237                                 goto wav_abort_;
 238                         }
 239                         else if(feof(fin))
 240                                 break;
 241                 }
 242                 else {
 243                         if(bytes_read > data_bytes)
 244                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 245                         if(bytes_read % bytes_per_wide_sample != 0) {
 246                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 247                                 goto wav_abort_;
 248                         }
 249                         else {
 250                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 251                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 252                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 253                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 254                                         goto wav_abort_;
 255                                 }
 256                                 data_bytes -= bytes_read;
 257                         }
 258                 }
 259         }
 260
 261 wav_end_:
 262         if(encoder_wrapper.encoder) {
 263                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 264                         FLAC__encoder_finish(encoder_wrapper.encoder);
 265                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 266         }
 267         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 268                 print_stats(&encoder_wrapper);
 269                 printf("\n");
 270         }
 271         if(verify) {
 272                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 273                         printf("Verify FAILED!  Do not use %s\n", outfile);
 274                         return 1;
 275                 }
 276                 else {
 277                         printf("Verify succeeded\n");
 278                 }
 279         }
 280         fclose(fin);
 281         return 0;
 282 wav_abort_:
 283         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 284                 printf("\n");
 285         if(encoder_wrapper.encoder) {
 286                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 287                         FLAC__encoder_finish(encoder_wrapper.encoder);
 288                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 289         }
 290         if(verify) {
 291                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 292                         printf("Verify FAILED!  Do not use %s\n", outfile);
 293                         return 1;
 294                 }
 295                 else {
 296                         printf("Verify succeeded\n");
 297                 }
 298         }
 299         fclose(fin);
 300         unlink(outfile);
 301         return 1;
 302 }
 303
 304 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)
 305 {
 306         encoder_wrapper_struct encoder_wrapper;
 307         FILE *fin;
 308         size_t bytes_read;
 309         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 310
 311         encoder_wrapper.encoder = 0;
 312         encoder_wrapper.verify = verify;
 313         encoder_wrapper.verbose = verbose;
 314         encoder_wrapper.bytes_written = 0;
 315         encoder_wrapper.samples_written = 0;
 316         encoder_wrapper.outfile = outfile;
 317
 318         if(0 == strcmp(infile, "-")) {
 319                 fin = stdin;
 320         }
 321         else {
 322                 if(0 == (fin = fopen(infile, "rb"))) {
 323                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 324                         return false;
 325                 }
 326         }
 327         if(0 == strcmp(outfile, "-")) {
 328                 encoder_wrapper.fout = stdout;
 329         }
 330         else {
 331                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 332                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 333                         fclose(fin);
 334                         return false;
 335                 }
 336         }
 337
 338         if(!init(&encoder_wrapper))
 339                 goto raw_abort_;
 340
 341         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))
 342                 goto raw_abort_;
 343
 344         /* get the file length */
 345         if(0 != fseek(fin, 0, SEEK_END)) {
 346                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 347         }
 348         else {
 349                 long filesize;
 350                 fflush(fin);
 351                 if(-1 == (filesize = ftell(fin))) {
 352                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 353                 }
 354                 else {
 355                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 356                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 357                 }
 358         }
 359
 360         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 361                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 362                 goto raw_abort_;
 363         }
 364
 365         encoder_wrapper.verify_fifo.into_frames = true;
 366
 367         while(!feof(fin)) {
 368                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 369                 if(bytes_read == 0) {
 370                         if(ferror(fin)) {
 371                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 372                                 goto raw_abort_;
 373                         }
 374                 }
 375                 else if(bytes_read % bytes_per_wide_sample != 0) {
 376                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 377                         goto raw_abort_;
 378                 }
 379                 else {
 380                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 381                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 382                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 383                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 384                                 goto raw_abort_;
 385                         }
 386                 }
 387         }
 388
 389         if(encoder_wrapper.encoder) {
 390                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 391                         FLAC__encoder_finish(encoder_wrapper.encoder);
 392                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 393         }
 394         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 395                 print_stats(&encoder_wrapper);
 396                 printf("\n");
 397         }
 398         if(verify) {
 399                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 400                         printf("Verify FAILED!  Do not use %s\n", outfile);
 401                         return 1;
 402                 }
 403                 else {
 404                         printf("Verify succeeded\n");
 405                 }
 406         }
 407         fclose(fin);
 408         return 0;
 409 raw_abort_:
 410         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 411                 printf("\n");
 412         if(encoder_wrapper.encoder) {
 413                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 414                         FLAC__encoder_finish(encoder_wrapper.encoder);
 415                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 416         }
 417         if(verify) {
 418                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 419                         printf("Verify FAILED!  Do not use %s\n", outfile);
 420                         return 1;
 421                 }
 422                 else {
 423                         printf("Verify succeeded\n");
 424                 }
 425         }
 426         fclose(fin);
 427         unlink(outfile);
 428         return 1;
 429 }
 430
 431 bool init(encoder_wrapper_struct *encoder_wrapper)
 432 {
 433         unsigned i;
 434         uint32 test = 1;
 435
 436         is_big_endian_host = (*((byte*)(&test)))? false : true;
 437
 438         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 439                 input[i] = &(in[i][0]);
 440
 441         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 442         if(0 == encoder_wrapper->encoder) {
 443                 fprintf(stderr, "ERROR creating the encoder instance\n");
 444                 return false;
 445         }
 446
 447         return true;
 448 }
 449
 450 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)
 451 {
 452         if(channels != 2 || bps > 16)
 453                 do_mid_side = false;
 454
 455         if(encoder_wrapper->verify) {
 456                 unsigned i;
 457
 458                 /* set up the fifo which will hold the original signal to compare against */
 459                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 460                 for(i = 0; i < channels; i++) {
 461                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 462                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 463                                 return false;
 464                         }
 465                 }
 466                 encoder_wrapper->verify_fifo.tail = 0;
 467                 encoder_wrapper->verify_fifo.into_frames = false;
 468                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 469
 470                 /* set up a stream decoder for verification */
 471                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 472                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 473                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 474                         return false;
 475                 }
 476                 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) {
 477                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 478                         return false;
 479                 }
 480         }
 481
 482         encoder_wrapper->encoder->streamable_subset = !lax;
 483         encoder_wrapper->encoder->channels = channels;
 484         encoder_wrapper->encoder->bits_per_sample = bps;
 485         encoder_wrapper->encoder->sample_rate = sample_rate;
 486         encoder_wrapper->encoder->blocksize = blocksize;
 487         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 488         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 489         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 490         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 491         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 492         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 493
 494         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 495                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
 496                 return false;
 497         }
 498
 499         return true;
 500 }
 501
 502 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 503 {
 504         unsigned wide_sample, sample, channel, byte;
 505
 506         if(bps == 8) {
 507                 if(is_unsigned_samples) {
 508                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 509                                 for(channel = 0; channel < channels; channel++, sample++)
 510                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
 511                 }
 512                 else {
 513                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 514                                 for(channel = 0; channel < channels; channel++, sample++)
 515                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 516                 }
 517         }
 518         else {
 519                 if(is_big_endian != is_big_endian_host) {
 520                         unsigned char tmp;
 521                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 522                         for(byte = 0; byte < bytes; byte += 2) {
 523                                 tmp = ucbuffer[byte];
 524                                 ucbuffer[byte] = ucbuffer[byte+1];
 525                                 ucbuffer[byte+1] = tmp;
 526                         }
 527                 }
 528                 if(is_unsigned_samples) {
 529                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 530                                 for(channel = 0; channel < channels; channel++, sample++)
 531                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
 532                 }
 533                 else {
 534                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 535                                 for(channel = 0; channel < channels; channel++, sample++)
 536                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 537                 }
 538         }
 539
 540         if(encoder_wrapper->verify) {
 541                 for(channel = 0; channel < channels; channel++)
 542                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 543                 encoder_wrapper->verify_fifo.tail += wide_samples;
 544                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 545         }
 546 }
 547
 548 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 549 {
 550         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 551         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 552
 553         encoder_wrapper->bytes_written += bytes;
 554         encoder_wrapper->samples_written += samples;
 555         encoder_wrapper->current_frame = current_frame;
 556
 557         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 558                 print_stats(encoder_wrapper);
 559
 560         if(encoder_wrapper->verify) {
 561                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 562                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 563                 if(encoder_wrapper->verify_fifo.into_frames) {
 564                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 565                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 566                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 567                         }
 568                 }
 569                 else {
 570                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 571                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 572                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 573                         }
 574                 }
 575         }
 576
 577         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 578                 return FLAC__ENCODER_WRITE_OK;
 579         else
 580                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 581 }
 582
 583 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 584 {
 585         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 586         byte b;
 587         FILE *f;
 588         const uint64 samples = metadata->data.encoding.total_samples;
 589         const unsigned min_framesize = metadata->data.encoding.min_framesize;
 590         const unsigned max_framesize = metadata->data.encoding.max_framesize;
 591
 592         (void)encoder; /* silence compiler warning about unused parameter */
 593
 594         if(encoder_wrapper->fout == stdout)
 595                 return;
 596
 597         fclose(encoder_wrapper->fout);
 598         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 599                 return;
 600
 601         /* all this is based on intimate knowledge of the stream header
 602          * layout, but a change to the header format that would break this
 603          * would also break all streams encoded in the previous format.
 604          */
 605
 606         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 607         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 608         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 609         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 610         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 611         b = (byte)((samples >> 24) & 0xFF);
 612         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 613         b = (byte)((samples >> 16) & 0xFF);
 614         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 615         b = (byte)((samples >> 8) & 0xFF);
 616         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 617         b = (byte)(samples & 0xFF);
 618         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 619
 620 framesize_:
 621         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 622         b = (byte)((min_framesize >> 16) & 0xFF);
 623         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 624         b = (byte)((min_framesize >> 8) & 0xFF);
 625         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 626         b = (byte)(min_framesize & 0xFF);
 627         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 628         b = (byte)((max_framesize >> 16) & 0xFF);
 629         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 630         b = (byte)((max_framesize >> 8) & 0xFF);
 631         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 632         b = (byte)(max_framesize & 0xFF);
 633         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 634 end_:
 635         fclose(encoder_wrapper->fout);
 636         return;
 637 }
 638
 639 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 640 {
 641         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 642         (void)decoder;
 643
 644         *bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 645         memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 646
 647         return FLAC__STREAM_DECODER_READ_CONTINUE;
 648 }
 649
 650 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
 651 {
 652         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 653         unsigned channel, l, r;
 654
 655         for(channel = 0; channel < decoder->channels; channel++) {
 656                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 657                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 658                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 659                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 660                 }
 661         }
 662         /* dequeue the frame from the fifo */
 663         for(channel = 0; channel < decoder->channels; channel++) {
 664                 for(l = 0, r = header->blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 665                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 666                 }
 667         }
 668         encoder_wrapper->verify_fifo.tail -= header->blocksize;
 669         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 670 }
 671
 672 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 673 {
 674         (void)decoder;
 675         (void)metadata;
 676         (void)client_data;
 677 }
 678
 679 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 680 {
 681         (void)decoder;
 682         (void)client_data;
 683         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 684 }
 685
 686 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 687 {
 688 #ifdef _MSC_VER
 689         /* with VC++ you have to spoon feed it the casting */
 690         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 691 #else
 692         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 693 #endif
 694         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 695                 progress * 100.0, encoder_wrapper->current_frame,
 696                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 697 #ifdef _MSC_VER
 698                 /* with VC++ you have to spoon feed it the casting */
 699                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 700 #else
 701                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 702 #endif
 703         );
 704         fflush(stdout);
 705 }
 706
 707 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 708 {
 709         size_t bytes_read = fread(val, 1, 2, f);
 710
 711         if(bytes_read == 0) {
 712                 if(!eof_ok) {
 713                         fprintf(stderr, "ERROR: unexpected EOF\n");
 714                         return false;
 715                 }
 716                 else
 717                         return true;
 718         }
 719         else if(bytes_read < 2) {
 720                 fprintf(stderr, "ERROR: unexpected EOF\n");
 721                 return false;
 722         }
 723         else {
 724                 if(is_big_endian_host) {
 725                         byte tmp, *b = (byte*)val;
 726                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 727                 }
 728                 return true;
 729         }
 730 }
 731
 732 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 733 {
 734         size_t bytes_read = fread(val, 1, 4, f);
 735
 736         if(bytes_read == 0) {
 737                 if(!eof_ok) {
 738                         fprintf(stderr, "ERROR: unexpected EOF\n");
 739                         return false;
 740                 }
 741                 else
 742                         return true;
 743         }
 744         else if(bytes_read < 4) {
 745                 fprintf(stderr, "ERROR: unexpected EOF\n");
 746                 return false;
 747         }
 748         else {
 749                 if(is_big_endian_host) {
 750                         byte tmp, *b = (byte*)val;
 751                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 752                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 753                 }
 754                 return true;
 755         }
 756 }