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 #include <assert.h>
  20 #if defined _WIN32 && !defined __CYGWIN__
  21 /* where MSVC puts unlink() */
  22 # include <io.h>
  23 #else
  24 # include <unistd.h>
  25 #endif
  26 #include <stdio.h> /* for FILE */
  27 #include <string.h> /* for strcmp() */
  28 #include "FLAC/all.h"
  29 #include "encode.h"
  30
  31 #define CHUNK_OF_SAMPLES 2048
  32
  33 typedef struct {
  34         FILE *fout;
  35         const char *outfile;
  36         FLAC__Encoder *encoder;
  37         bool verbose;
  38         uint64 unencoded_size;
  39         uint64 total_samples_to_encode;
  40         uint64 bytes_written;
  41         uint64 samples_written;
  42         unsigned current_frame;
  43 } encoder_wrapper_struct;
  44
  45 static bool is_big_endian_host;
  46
  47 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
  48 static signed char *scbuffer = (signed char *)ucbuffer;
  49 static uint16 *usbuffer = (uint16 *)ucbuffer;
  50 static int16 *ssbuffer = (int16 *)ucbuffer;
  51
  52 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  53 static int32 *input[FLAC__MAX_CHANNELS];
  54
  55 /* local routines */
  56 static bool init(encoder_wrapper_struct *encoder_wrapper);
  57 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);
  58 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps);
  59 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  60 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
  61 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
  62 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
  63 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
  64
  65 int encode_wav(const char *infile, const char *outfile, bool verbose, uint64 skip, 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)
  66 {
  67         encoder_wrapper_struct encoder_wrapper;
  68         FILE *fin;
  69         bool is_unsigned_samples;
  70         unsigned channels, bps, sample_rate, data_bytes;
  71         size_t bytes_per_wide_sample, bytes_read;
  72         uint16 x;
  73         uint32 xx;
  74
  75         encoder_wrapper.encoder = 0;
  76         encoder_wrapper.verbose = verbose;
  77         encoder_wrapper.bytes_written = 0;
  78         encoder_wrapper.samples_written = 0;
  79         encoder_wrapper.outfile = outfile;
  80
  81         if(0 == strcmp(infile, "-")) {
  82                 fin = stdin;
  83         }
  84         else {
  85                 if(0 == (fin = fopen(infile, "rb"))) {
  86                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
  87                         return false;
  88                 }
  89         }
  90         if(0 == strcmp(outfile, "-")) {
  91                 encoder_wrapper.fout = stdout;
  92         }
  93         else {
  94                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
  95                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
  96                         fclose(fin);
  97                         return false;
  98                 }
  99         }
 100
 101         if(!init(&encoder_wrapper))
 102                 goto wav_abort_;
 103
 104         /*
 105          * check the RIFF chunk
 106          */
 107         if(!read_little_endian_uint32(fin, &xx, false))
 108                 goto wav_abort_;
 109         if(xx != 0x46464952) { /* "RIFF" */
 110                 fprintf(stderr, "ERROR: no RIFF header\n");
 111                 goto wav_abort_;
 112         }
 113         if(!read_little_endian_uint32(fin, &xx, false))
 114                 goto wav_abort_;
 115
 116         /*
 117          * now process the WAVE chunk
 118          */
 119         if(!read_little_endian_uint32(fin, &xx, true))
 120                 goto wav_end_;
 121         if(xx != 0x45564157) { /* "WAVE" */
 122                 fprintf(stderr, "ERROR: no WAVE header\n");
 123                 goto wav_abort_;
 124         }
 125
 126         /* do the format sub-chunk */
 127         if(!read_little_endian_uint32(fin, &xx, false))
 128                 goto wav_abort_;
 129         if(xx != 0x20746d66) { /* "fmt " */
 130                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 131                 goto wav_abort_;
 132         }
 133         /* fmt chunk size */
 134         if(!read_little_endian_uint32(fin, &xx, false))
 135                 goto wav_abort_;
 136         if(xx != 16) {
 137                 fprintf(stderr, "ERROR: unsupported chunk\n");
 138                 goto wav_abort_;
 139         }
 140         /* compression code */
 141         if(!read_little_endian_uint16(fin, &x, false))
 142                 goto wav_abort_;
 143         if(x != 1) {
 144                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 145                 goto wav_abort_;
 146         }
 147         /* number of channels */
 148         if(!read_little_endian_uint16(fin, &x, false))
 149                 goto wav_abort_;
 150         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 151                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 152                 goto wav_abort_;
 153         }
 154         channels = x;
 155         /* sample rate */
 156         if(!read_little_endian_uint32(fin, &xx, false))
 157                 goto wav_abort_;
 158         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 159                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 160                 goto wav_abort_;
 161         }
 162         sample_rate = xx;
 163         /* avg bytes per second (ignored) */
 164         if(!read_little_endian_uint32(fin, &xx, false))
 165                 goto wav_abort_;
 166         /* block align (ignored) */
 167         if(!read_little_endian_uint16(fin, &x, false))
 168                 goto wav_abort_;
 169         /* bits per sample */
 170         if(!read_little_endian_uint16(fin, &x, false))
 171                 goto wav_abort_;
 172         if(x != 8 && x != 16) {
 173                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 174                 goto wav_abort_;
 175         }
 176         bps = x;
 177         is_unsigned_samples = (x == 8);
 178
 179         /* do the data sub-chunk */
 180         if(!read_little_endian_uint32(fin, &xx, false))
 181                 goto wav_abort_;
 182         if(xx != 0x61746164) { /* "data" */
 183                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 184                 goto wav_abort_;
 185         }
 186         /* data size */
 187         if(!read_little_endian_uint32(fin, &xx, false))
 188                 goto wav_abort_;
 189         data_bytes = xx;
 190
 191         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))
 192                 goto wav_abort_;
 193
 194         bytes_per_wide_sample = channels * (bps >> 3);
 195
 196         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 197                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 198                 goto wav_abort_;
 199         }
 200
 201         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 202         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 203
 204         while(data_bytes > 0) {
 205                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 206                 if(bytes_read == 0) {
 207                         if(ferror(fin)) {
 208                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 209                                 goto wav_abort_;
 210                         }
 211                         else if(feof(fin))
 212                                 break;
 213                 }
 214                 else if(bytes_read % bytes_per_wide_sample != 0) {
 215                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 216                         goto wav_abort_;
 217                 }
 218                 else {
 219                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 220                         format_input(wide_samples, false, is_unsigned_samples, channels, bps);
 221                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 222                                 fprintf(stderr, "ERROR during encoding, state = %d\n", encoder_wrapper.encoder->state);
 223                                 goto wav_abort_;
 224                         }
 225                         data_bytes -= bytes_read;
 226                 }
 227         }
 228
 229 wav_end_:
 230         if(encoder_wrapper.encoder) {
 231                 if(encoder_wrapper.encoder->state != FLAC__ENCODER_UNINITIALIZED)
 232                         FLAC__encoder_finish(encoder_wrapper.encoder);
 233                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 234         }
 235         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 236                 print_stats(&encoder_wrapper);
 237                 printf("\n");
 238         }
 239         fclose(fin);
 240         return 0;
 241 wav_abort_:
 242         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 243                 printf("\n");
 244         if(encoder_wrapper.encoder) {
 245                 if(encoder_wrapper.encoder->state != FLAC__ENCODER_UNINITIALIZED)
 246                         FLAC__encoder_finish(encoder_wrapper.encoder);
 247                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 248         }
 249         fclose(fin);
 250         unlink(outfile);
 251         return 1;
 252 }
 253
 254 int encode_raw(const char *infile, const char *outfile, bool verbose, uint64 skip, 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)
 255 {
 256         encoder_wrapper_struct encoder_wrapper;
 257         FILE *fin;
 258         size_t bytes_read;
 259         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 260
 261         encoder_wrapper.encoder = 0;
 262         encoder_wrapper.verbose = verbose;
 263         encoder_wrapper.bytes_written = 0;
 264         encoder_wrapper.samples_written = 0;
 265         encoder_wrapper.outfile = outfile;
 266
 267         if(0 == strcmp(infile, "-")) {
 268                 fin = stdin;
 269         }
 270         else {
 271                 if(0 == (fin = fopen(infile, "rb"))) {
 272                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 273                         return false;
 274                 }
 275         }
 276         if(0 == strcmp(outfile, "-")) {
 277                 encoder_wrapper.fout = stdout;
 278         }
 279         else {
 280                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 281                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 282                         fclose(fin);
 283                         return false;
 284                 }
 285         }
 286
 287         if(!init(&encoder_wrapper))
 288                 goto raw_abort_;
 289
 290         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))
 291                 goto raw_abort_;
 292
 293         /* get the file length */
 294         if(0 != fseek(fin, 0, SEEK_END)) {
 295                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 296         }
 297         else {
 298                 long filesize;
 299                 fflush(fin);
 300                 if(-1 == (filesize = ftell(fin))) {
 301                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 302                 }
 303                 else {
 304                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 305                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 306                 }
 307         }
 308
 309         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 310                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 311                 goto raw_abort_;
 312         }
 313
 314         while(!feof(fin)) {
 315                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 316                 if(bytes_read == 0) {
 317                         if(ferror(fin)) {
 318                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 319                                 goto raw_abort_;
 320                         }
 321                 }
 322                 else if(bytes_read % bytes_per_wide_sample != 0) {
 323                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 324                         goto raw_abort_;
 325                 }
 326                 else {
 327                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 328                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps);
 329                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 330                                 fprintf(stderr, "ERROR during encoding, state = %d\n", encoder_wrapper.encoder->state);
 331                                 goto raw_abort_;
 332                         }
 333                 }
 334         }
 335
 336         if(encoder_wrapper.encoder) {
 337                 if(encoder_wrapper.encoder->state != FLAC__ENCODER_UNINITIALIZED)
 338                         FLAC__encoder_finish(encoder_wrapper.encoder);
 339                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 340         }
 341         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 342                 print_stats(&encoder_wrapper);
 343                 printf("\n");
 344         }
 345         fclose(fin);
 346         return 0;
 347 raw_abort_:
 348         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 349                 printf("\n");
 350         if(encoder_wrapper.encoder) {
 351                 if(encoder_wrapper.encoder->state != FLAC__ENCODER_UNINITIALIZED)
 352                         FLAC__encoder_finish(encoder_wrapper.encoder);
 353                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 354         }
 355         fclose(fin);
 356         unlink(outfile);
 357         return 1;
 358 }
 359
 360 bool init(encoder_wrapper_struct *encoder_wrapper)
 361 {
 362         unsigned i;
 363         uint32 test = 1;
 364
 365         is_big_endian_host = (*((byte*)(&test)))? false : true;
 366
 367         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 368                 input[i] = &(in[i][0]);
 369
 370         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 371         if(0 == encoder_wrapper->encoder) {
 372                 fprintf(stderr, "ERROR creating the encoder instance\n");
 373                 return false;
 374         }
 375
 376         return true;
 377 }
 378
 379 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)
 380 {
 381         if(channels != 2 || bps > 16)
 382                 do_mid_side = false;
 383
 384         encoder_wrapper->encoder->streamable_subset = !lax;
 385         encoder_wrapper->encoder->channels = channels;
 386         encoder_wrapper->encoder->bits_per_sample = bps;
 387         encoder_wrapper->encoder->sample_rate = sample_rate;
 388         encoder_wrapper->encoder->blocksize = blocksize;
 389         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 390         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 391         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 392         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 393         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 394         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 395
 396         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 397                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
 398                 return false;
 399         }
 400
 401         return true;
 402 }
 403
 404 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps)
 405 {
 406         unsigned wide_sample, sample, channel, byte;
 407
 408         if(bps == 8) {
 409                 if(is_unsigned_samples) {
 410                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 411                                 for(channel = 0; channel < channels; channel++, sample++)
 412                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
 413                 }
 414                 else {
 415                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 416                                 for(channel = 0; channel < channels; channel++, sample++)
 417                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 418                 }
 419         }
 420         else {
 421                 if(is_big_endian != is_big_endian_host) {
 422                         unsigned char tmp;
 423                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 424                         for(byte = 0; byte < bytes; byte += 2) {
 425                                 tmp = ucbuffer[byte];
 426                                 ucbuffer[byte] = ucbuffer[byte+1];
 427                                 ucbuffer[byte+1] = tmp;
 428                         }
 429                 }
 430                 if(is_unsigned_samples) {
 431                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 432                                 for(channel = 0; channel < channels; channel++, sample++)
 433                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
 434                 }
 435                 else {
 436                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 437                                 for(channel = 0; channel < channels; channel++, sample++)
 438                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 439                 }
 440         }
 441 }
 442
 443 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 444 {
 445         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 446         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 447
 448         encoder_wrapper->bytes_written += bytes;
 449         encoder_wrapper->samples_written += samples;
 450         encoder_wrapper->current_frame = current_frame;
 451
 452         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 453                 print_stats(encoder_wrapper);
 454
 455         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 456                 return FLAC__ENCODER_WRITE_OK;
 457         else
 458                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 459 }
 460
 461 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 462 {
 463         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 464         byte b;
 465         FILE *f;
 466         const uint64 samples = metadata->data.encoding.total_samples;
 467         const unsigned min_framesize = metadata->data.encoding.min_framesize;
 468         const unsigned max_framesize = metadata->data.encoding.max_framesize;
 469
 470         (void)encoder; /* silence compiler warning about unused parameter */
 471
 472         if(encoder_wrapper->fout == stdout)
 473                 return;
 474
 475         fclose(encoder_wrapper->fout);
 476         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 477                 return;
 478
 479         /* all this is based on intimate knowledge of the stream header
 480          * layout, but a change to the header format that would break this
 481          * would also break all streams encoded in the previous format.
 482          */
 483
 484         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 485         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 486         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 487         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 488         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 489         b = (byte)((samples >> 24) & 0xFF);
 490         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 491         b = (byte)((samples >> 16) & 0xFF);
 492         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 493         b = (byte)((samples >> 8) & 0xFF);
 494         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 495         b = (byte)(samples & 0xFF);
 496         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 497
 498 framesize_:
 499         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 500         b = (byte)((min_framesize >> 16) & 0xFF);
 501         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 502         b = (byte)((min_framesize >> 8) & 0xFF);
 503         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 504         b = (byte)(min_framesize & 0xFF);
 505         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 506         b = (byte)((max_framesize >> 16) & 0xFF);
 507         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 508         b = (byte)((max_framesize >> 8) & 0xFF);
 509         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 510         b = (byte)(max_framesize & 0xFF);
 511         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 512 end_:
 513         fclose(encoder_wrapper->fout);
 514         return;
 515 }
 516
 517 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 518 {
 519 #ifdef _MSC_VER
 520         /* with VC++ you have to spoon feed it the casting */
 521         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 522 #else
 523         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 524 #endif
 525         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 526                 progress * 100.0, encoder_wrapper->current_frame,
 527                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 528 #ifdef _MSC_VER
 529                 /* with VC++ you have to spoon feed it the casting */
 530                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 531 #else
 532                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 533 #endif
 534         );
 535         fflush(stdout);
 536 }
 537
 538 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 539 {
 540         size_t bytes_read = fread(val, 1, 2, f);
 541
 542         if(bytes_read == 0) {
 543                 if(!eof_ok) {
 544                         fprintf(stderr, "ERROR: unexpected EOF\n");
 545                         return false;
 546                 }
 547                 else
 548                         return true;
 549         }
 550         else if(bytes_read < 2) {
 551                 fprintf(stderr, "ERROR: unexpected EOF\n");
 552                 return false;
 553         }
 554         else {
 555                 if(is_big_endian_host) {
 556                         byte tmp, *b = (byte*)val;
 557                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 558                 }
 559                 return true;
 560         }
 561 }
 562
 563 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 564 {
 565         size_t bytes_read = fread(val, 1, 4, f);
 566
 567         if(bytes_read == 0) {
 568                 if(!eof_ok) {
 569                         fprintf(stderr, "ERROR: unexpected EOF\n");
 570                         return false;
 571                 }
 572                 else
 573                         return true;
 574         }
 575         else if(bytes_read < 4) {
 576                 fprintf(stderr, "ERROR: unexpected EOF\n");
 577                 return false;
 578         }
 579         else {
 580                 if(is_big_endian_host) {
 581                         byte tmp, *b = (byte*)val;
 582                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 583                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 584                 }
 585                 return true;
 586         }
 587 }