src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 /*@@@ need to "_finish()" the verify decoder */
  20
  21 #include <assert.h>
  22 #if defined _WIN32 && !defined __CYGWIN__
  23 /* where MSVC puts unlink() */
  24 # include <io.h>
  25 #else
  26 # include <unistd.h>
  27 #endif
  28 #include <stdio.h> /* for FILE et al. */
  29 #include <stdlib.h> /* for malloc */
  30 #include <string.h> /* for strcmp() */
  31 #include "FLAC/all.h"
  32 #include "encode.h"
  33
  34 #ifdef min
  35 #undef min
  36 #endif
  37 #define min(x,y) ((x)<(y)?(x):(y))
  38
  39 #define CHUNK_OF_SAMPLES 2048
  40
  41 typedef enum {
  42         FLAC__VERIFY_OK,
  43         FLAC__VERIFY_FAILED_IN_FRAME,
  44         FLAC__VERIFY_FAILED_IN_METADATA
  45 } verify_code;
  46
  47 static const char *verify_code_string[] = {
  48         "FLAC__VERIFY_OK",
  49         "FLAC__VERIFY_FAILED_IN_FRAME",
  50         "FLAC__VERIFY_FAILED_IN_METADATA"
  51 };
  52
  53 typedef struct {
  54         int32 *original[FLAC__MAX_CHANNELS];
  55         unsigned size; /* of each original[] in samples */
  56         unsigned tail; /* in wide samples */
  57         const byte *encoded_signal;
  58         unsigned encoded_signal_capacity;
  59         unsigned encoded_bytes;
  60         bool into_frames;
  61         verify_code result;
  62         FLAC__StreamDecoder *decoder;
  63 } verify_fifo_struct;
  64
  65 typedef struct {
  66         FILE *fout;
  67         const char *outfilename;
  68         FLAC__Encoder *encoder;
  69         bool verify;
  70         bool verbose;
  71         uint64 unencoded_size;
  72         uint64 total_samples_to_encode;
  73         uint64 bytes_written;
  74         uint64 samples_written;
  75         uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
  76         unsigned current_frame;
  77         verify_fifo_struct verify_fifo;
  78         FLAC__StreamMetaData_SeekTable seek_table;
  79         unsigned first_seek_point_to_check;
  80 } encoder_wrapper_struct;
  81
  82 static bool is_big_endian_host;
  83
  84 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
  85 static signed char *scbuffer = (signed char *)ucbuffer;
  86 static uint16 *usbuffer = (uint16 *)ucbuffer;
  87 static int16 *ssbuffer = (int16 *)ucbuffer;
  88
  89 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  90 static int32 *input[FLAC__MAX_CHANNELS];
  91
  92 /* local routines */
  93 static bool init(encoder_wrapper_struct *encoder_wrapper);
  94 static bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper);
  95 static bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table);
  96 static void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize);
  97 static int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r);
  98 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  99 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
 100 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
 101 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
 102 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
 103 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
 104 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 105 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
 106 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
 107 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
 108 static bool write_big_endian_uint16(FILE *f, uint16 val);
 109 static bool write_big_endian_uint64(FILE *f, uint64 val);
 110
 111 int encode_wav(FILE *infile, const char *infilename, const char *outfilename, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points)
 112 {
 113         encoder_wrapper_struct encoder_wrapper;
 114         bool is_unsigned_samples;
 115         unsigned channels, bps, sample_rate, data_bytes;
 116         size_t bytes_per_wide_sample, bytes_read;
 117         uint16 x;
 118         uint32 xx;
 119
 120         encoder_wrapper.encoder = 0;
 121         encoder_wrapper.verify = verify;
 122         encoder_wrapper.verbose = verbose;
 123         encoder_wrapper.bytes_written = 0;
 124         encoder_wrapper.samples_written = 0;
 125         encoder_wrapper.outfilename = outfilename;
 126         encoder_wrapper.seek_table.points = 0;
 127         encoder_wrapper.first_seek_point_to_check = 0;
 128
 129         if(0 == strcmp(outfilename, "-")) {
 130                 encoder_wrapper.fout = stdout;
 131         }
 132         else {
 133                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 134                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
 135                         fclose(infile);
 136                         return false;
 137                 }
 138         }
 139
 140         if(!init(&encoder_wrapper))
 141                 goto wav_abort_;
 142
 143         /*
 144          * check the RIFF chunk
 145          */
 146         if(!read_little_endian_uint32(infile, &xx, false))
 147                 goto wav_abort_;
 148         if(xx != 0x46464952) { /* "RIFF" */
 149                 fprintf(stderr, "ERROR: no RIFF header\n");
 150                 goto wav_abort_;
 151         }
 152         if(!read_little_endian_uint32(infile, &xx, false))
 153                 goto wav_abort_;
 154
 155         /*
 156          * now process the WAVE chunk
 157          */
 158         if(!read_little_endian_uint32(infile, &xx, true))
 159                 goto wav_end_;
 160         if(xx != 0x45564157) { /* "WAVE" */
 161                 fprintf(stderr, "ERROR: no WAVE header\n");
 162                 goto wav_abort_;
 163         }
 164
 165         /* do the format sub-chunk */
 166         if(!read_little_endian_uint32(infile, &xx, false))
 167                 goto wav_abort_;
 168         if(xx != 0x20746d66) { /* "fmt " */
 169                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 170                 goto wav_abort_;
 171         }
 172         /* fmt chunk size */
 173         if(!read_little_endian_uint32(infile, &xx, false))
 174                 goto wav_abort_;
 175         if(xx != 16) {
 176                 fprintf(stderr, "ERROR: unsupported chunk\n");
 177                 goto wav_abort_;
 178         }
 179         /* compression code */
 180         if(!read_little_endian_uint16(infile, &x, false))
 181                 goto wav_abort_;
 182         if(x != 1) {
 183                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 184                 goto wav_abort_;
 185         }
 186         /* number of channels */
 187         if(!read_little_endian_uint16(infile, &x, false))
 188                 goto wav_abort_;
 189         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 190                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 191                 goto wav_abort_;
 192         }
 193         channels = x;
 194         /* sample rate */
 195         if(!read_little_endian_uint32(infile, &xx, false))
 196                 goto wav_abort_;
 197         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 198                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 199                 goto wav_abort_;
 200         }
 201         sample_rate = xx;
 202         /* avg bytes per second (ignored) */
 203         if(!read_little_endian_uint32(infile, &xx, false))
 204                 goto wav_abort_;
 205         /* block align (ignored) */
 206         if(!read_little_endian_uint16(infile, &x, false))
 207                 goto wav_abort_;
 208         /* bits per sample */
 209         if(!read_little_endian_uint16(infile, &x, false))
 210                 goto wav_abort_;
 211         if(x != 8 && x != 16) {
 212                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 213                 goto wav_abort_;
 214         }
 215         bps = x;
 216         is_unsigned_samples = (x == 8);
 217
 218         /* do the data sub-chunk */
 219         if(!read_little_endian_uint32(infile, &xx, false))
 220                 goto wav_abort_;
 221         if(xx != 0x61746164) { /* "data" */
 222                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 223                 goto wav_abort_;
 224         }
 225         /* data size */
 226         if(!read_little_endian_uint32(infile, &xx, false))
 227                 goto wav_abort_;
 228         data_bytes = xx;
 229
 230         bytes_per_wide_sample = channels * (bps >> 3);
 231
 232         if(skip > 0) {
 233                 if(infile != stdin) {
 234                         if(-1 == fseek(infile, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 235                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infilename);
 236                                 goto wav_abort_;
 237                         }
 238                 }
 239                 else {
 240                         int64 left;
 241                         unsigned need;
 242                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 243                                 need = min(left, CHUNK_OF_SAMPLES);
 244                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, infile) < need) {
 245                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infilename);
 246                                         goto wav_abort_;
 247                                 }
 248                         }
 249                 }
 250         }
 251
 252         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 253         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 254
 255         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 256                 goto wav_abort_;
 257
 258         encoder_wrapper.verify_fifo.into_frames = true;
 259
 260         while(data_bytes > 0) {
 261                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
 262                 if(bytes_read == 0) {
 263                         if(ferror(infile)) {
 264                                 fprintf(stderr, "ERROR reading from %s\n", infilename);
 265                                 goto wav_abort_;
 266                         }
 267                         else if(feof(infile))
 268                                 break;
 269                 }
 270                 else {
 271                         if(bytes_read > data_bytes)
 272                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 273                         if(bytes_read % bytes_per_wide_sample != 0) {
 274                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infilename);
 275                                 goto wav_abort_;
 276                         }
 277                         else {
 278                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 279                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 280
 281                                 /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 282                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 283                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 284                                         goto wav_abort_;
 285                                 }
 286                                 data_bytes -= bytes_read;
 287                         }
 288                 }
 289         }
 290
 291 wav_end_:
 292         if(encoder_wrapper.encoder) {
 293                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 294                         FLAC__encoder_finish(encoder_wrapper.encoder);
 295                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 296         }
 297         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 298                 print_stats(&encoder_wrapper);
 299                 fprintf(stderr, "\n");
 300         }
 301         if(0 != encoder_wrapper.seek_table.points)
 302                 free(encoder_wrapper.seek_table.points);
 303         if(verify) {
 304                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 305                         fprintf(stderr, "%s: Verify FAILED! (%s)  Do not use %s\n", infilename, verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 306                         return 1;
 307                 }
 308                 else if(encoder_wrapper.verbose) {
 309                         fprintf(stderr, "%s: Verify succeeded\n", infilename);
 310                 }
 311         }
 312         if(infile != stdin)
 313                 fclose(infile);
 314         return 0;
 315 wav_abort_:
 316         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 317                 fprintf(stderr, "\n");
 318         if(encoder_wrapper.encoder) {
 319                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 320                         FLAC__encoder_finish(encoder_wrapper.encoder);
 321                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 322         }
 323         if(0 != encoder_wrapper.seek_table.points)
 324                 free(encoder_wrapper.seek_table.points);
 325         if(verify) {
 326                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 327                         fprintf(stderr, "%s: Verify FAILED! (%s)  Do not use %s\n", infilename, verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 328                         return 1;
 329                 }
 330                 else if(encoder_wrapper.verbose) {
 331                         fprintf(stderr, "%s: Verify succeeded\n", infilename);
 332                 }
 333         }
 334         if(infile != stdin)
 335                 fclose(infile);
 336         unlink(outfilename);
 337         return 1;
 338 }
 339
 340 int encode_raw(FILE *infile, const char *infilename, const char *outfilename, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 341 {
 342         encoder_wrapper_struct encoder_wrapper;
 343         size_t bytes_read;
 344         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 345
 346         encoder_wrapper.encoder = 0;
 347         encoder_wrapper.verify = verify;
 348         encoder_wrapper.verbose = verbose;
 349         encoder_wrapper.bytes_written = 0;
 350         encoder_wrapper.samples_written = 0;
 351         encoder_wrapper.outfilename = outfilename;
 352         encoder_wrapper.seek_table.points = 0;
 353         encoder_wrapper.first_seek_point_to_check = 0;
 354
 355         if(0 == strcmp(outfilename, "-")) {
 356                 encoder_wrapper.fout = stdout;
 357         }
 358         else {
 359                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
 360                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
 361                         fclose(infile);
 362                         return false;
 363                 }
 364         }
 365
 366         if(!init(&encoder_wrapper))
 367                 goto raw_abort_;
 368
 369         /* get the file length */
 370         if(0 != fseek(infile, 0, SEEK_END)) {
 371                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 372         }
 373         else {
 374                 long filesize;
 375                 fflush(infile);
 376                 if(-1 == (filesize = ftell(infile))) {
 377                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 378                 }
 379                 else {
 380                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 381                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 382                 }
 383         }
 384
 385         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode <= 0)
 386                 fprintf(stderr, "(No runtime statistics possible; please wait for encoding to finish...)\n");
 387
 388         if(skip > 0) {
 389                 if(infile != stdin) {
 390                         if(-1 == fseek(infile, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 391                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infilename);
 392                                 goto raw_abort_;
 393                         }
 394                 }
 395                 else {
 396                         int64 left;
 397                         unsigned need;
 398                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 399                                 need = min(left, CHUNK_OF_SAMPLES);
 400                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, infile) < need) {
 401                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infilename);
 402                                         goto raw_abort_;
 403                                 }
 404                         }
 405                 }
 406         }
 407         else {
 408                 fseek(infile, 0, SEEK_SET);
 409         }
 410
 411         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
 412                 goto raw_abort_;
 413
 414         encoder_wrapper.verify_fifo.into_frames = true;
 415
 416         while(!feof(infile)) {
 417                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
 418                 if(bytes_read == 0) {
 419                         if(ferror(infile)) {
 420                                 fprintf(stderr, "ERROR reading from %s\n", infilename);
 421                                 goto raw_abort_;
 422                         }
 423                 }
 424                 else if(bytes_read % bytes_per_wide_sample != 0) {
 425                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infilename);
 426                         goto raw_abort_;
 427                 }
 428                 else {
 429                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 430                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 431
 432                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
 433                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 434                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 435                                 goto raw_abort_;
 436                         }
 437                 }
 438         }
 439
 440         if(encoder_wrapper.encoder) {
 441                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 442                         FLAC__encoder_finish(encoder_wrapper.encoder);
 443                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 444         }
 445         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 446                 print_stats(&encoder_wrapper);
 447                 fprintf(stderr, "\n");
 448         }
 449         if(0 != encoder_wrapper.seek_table.points)
 450                 free(encoder_wrapper.seek_table.points);
 451         if(verify) {
 452                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 453                         fprintf(stderr, "%s: Verify FAILED! (%s)  Do not use %s\n", infilename, verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 454                         return 1;
 455                 }
 456                 else if(encoder_wrapper.verbose) {
 457                         fprintf(stderr, "%s: Verify succeeded\n", infilename);
 458                 }
 459         }
 460         if(infile != stdin)
 461                 fclose(infile);
 462         return 0;
 463 raw_abort_:
 464         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 465                 fprintf(stderr, "\n");
 466         if(encoder_wrapper.encoder) {
 467                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 468                         FLAC__encoder_finish(encoder_wrapper.encoder);
 469                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 470         }
 471         if(0 != encoder_wrapper.seek_table.points)
 472                 free(encoder_wrapper.seek_table.points);
 473         if(verify) {
 474                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 475                         fprintf(stderr, "%s: Verify FAILED! (%s)  Do not use %s\n", infilename, verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
 476                         return 1;
 477                 }
 478                 else if(encoder_wrapper.verbose) {
 479                         fprintf(stderr, "%s: Verify succeeded\n", infilename);
 480                 }
 481         }
 482         if(infile != stdin)
 483                 fclose(infile);
 484         unlink(outfilename);
 485         return 1;
 486 }
 487
 488 bool init(encoder_wrapper_struct *encoder_wrapper)
 489 {
 490         unsigned i;
 491         uint32 test = 1;
 492
 493         is_big_endian_host = (*((byte*)(&test)))? false : true;
 494
 495         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 496                 input[i] = &(in[i][0]);
 497
 498         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 499         if(0 == encoder_wrapper->encoder) {
 500                 fprintf(stderr, "ERROR creating the encoder instance\n");
 501                 return false;
 502         }
 503
 504         return true;
 505 }
 506
 507 bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned min_residual_partition_order, unsigned max_residual_partition_order, unsigned rice_parameter_search_dist, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper)
 508 {
 509         unsigned i;
 510
 511         if(channels != 2)
 512                 do_mid_side = loose_mid_side = false;
 513
 514         if(encoder_wrapper->verify) {
 515                 /* set up the fifo which will hold the original signal to compare against */
 516                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 517                 for(i = 0; i < channels; i++) {
 518                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 519                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 520                                 return false;
 521                         }
 522                 }
 523                 encoder_wrapper->verify_fifo.tail = 0;
 524                 encoder_wrapper->verify_fifo.into_frames = false;
 525                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 526
 527                 /* set up a stream decoder for verification */
 528                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 529                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 530                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 531                         return false;
 532                 }
 533                 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) {
 534                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 535                         return false;
 536                 }
 537         }
 538
 539         if(!convert_to_seek_table(requested_seek_points, num_requested_seek_points, encoder_wrapper->total_samples_to_encode, blocksize, &encoder_wrapper->seek_table)) {
 540                 fprintf(stderr, "ERROR allocating seek table\n");
 541                 return false;
 542         }
 543
 544         encoder_wrapper->encoder->streamable_subset = !lax;
 545         encoder_wrapper->encoder->channels = channels;
 546         encoder_wrapper->encoder->bits_per_sample = bps;
 547         encoder_wrapper->encoder->sample_rate = sample_rate;
 548         encoder_wrapper->encoder->blocksize = blocksize;
 549         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 550         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 551         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 552         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
 553         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 554         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 555         encoder_wrapper->encoder->min_residual_partition_order = min_residual_partition_order;
 556         encoder_wrapper->encoder->max_residual_partition_order = max_residual_partition_order;
 557         encoder_wrapper->encoder->rice_parameter_search_dist = rice_parameter_search_dist;
 558         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 559         encoder_wrapper->encoder->seek_table = (encoder_wrapper->seek_table.num_points > 0)? &encoder_wrapper->seek_table : 0;
 560         encoder_wrapper->encoder->padding = padding;
 561
 562         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 563                 fprintf(stderr, "ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->encoder->state, FLAC__EncoderStateString[encoder_wrapper->encoder->state]);
 564                 return false;
 565         }
 566
 567         /* the above call write all the metadata, so we save the stream offset now */
 568         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
 569
 570         return true;
 571 }
 572
 573 bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table)
 574 {
 575         unsigned i, j, real_points, placeholders;
 576         char *pt = requested_seek_points, *q;
 577         bool first;
 578
 579         seek_table->num_points = 0;
 580
 581         if(num_requested_seek_points == 0)
 582                 return true;
 583
 584         if(num_requested_seek_points < 0) {
 585                 strcpy(requested_seek_points, "100x<");
 586                 num_requested_seek_points = 1;
 587         }
 588
 589         /* first count how many individual seek point we may need */
 590         real_points = placeholders = 0;
 591         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 592                 q = strchr(pt, '<');
 593                 assert(0 != q);
 594                 *q = '\0';
 595
 596                 if(0 == strcmp(pt, "X")) { /* -S X */
 597                         placeholders++;
 598                 }
 599                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 600                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
 601                                 real_points += (unsigned)atoi(pt);
 602                 }
 603                 else { /* -S # */
 604                         real_points++;
 605                 }
 606                 *q++ = '<';
 607
 608                 pt = q;
 609         }
 610         pt = requested_seek_points;
 611
 612         /* make some space */
 613         if(0 == (seek_table->points = (FLAC__StreamMetaData_SeekPoint*)malloc(sizeof(FLAC__StreamMetaData_SeekPoint) * (real_points+placeholders))))
 614                 return false;
 615
 616         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
 617         for(i = 0; i < real_points+placeholders; i++) {
 618                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 619                 seek_table->points[i].stream_offset = 0;
 620                 seek_table->points[i].frame_samples = 0;
 621         }
 622
 623         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
 624                 q = strchr(pt, '<');
 625                 assert(0 != q);
 626                 *q++ = '\0';
 627
 628                 if(0 == strcmp(pt, "X")) { /* -S X */
 629                         ; /* we append placeholders later */
 630                 }
 631                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
 632                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
 633                                 unsigned j, n;
 634                                 n = (unsigned)atoi(pt);
 635                                 for(j = 0; j < n; j++)
 636                                         append_point_to_seek_table(seek_table, stream_samples * (uint64)j / (uint64)n, stream_samples, blocksize);
 637                         }
 638                 }
 639                 else { /* -S # */
 640                         append_point_to_seek_table(seek_table, (uint64)atoi(pt), stream_samples, blocksize);
 641                 }
 642
 643                 pt = q;
 644         }
 645
 646         /* sort the seekpoints */
 647         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetaData_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
 648
 649         /* uniqify the seekpoints */
 650         first = true;
 651         for(i = j = 0; i < seek_table->num_points; i++) {
 652                 if(!first) {
 653                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
 654                                 continue;
 655                 }
 656                 first = false;
 657                 seek_table->points[j++] = seek_table->points[i];
 658         }
 659         seek_table->num_points = j;
 660
 661         /* append placeholders */
 662         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
 663                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 664         seek_table->num_points += placeholders;
 665
 666         return true;
 667 }
 668
 669 void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize)
 670 {
 671         const uint64 target_sample = (sample / blocksize) * blocksize;
 672
 673         if(stream_samples == 0 || target_sample < stream_samples)
 674                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
 675 }
 676
 677 int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r)
 678 {
 679         /* we don't just 'return l->sample_number - r->sample_number' since the result (int64) might overflow an 'int' */
 680         if(l->sample_number == r->sample_number)
 681                 return 0;
 682         else if(l->sample_number < r->sample_number)
 683                 return -1;
 684         else
 685                 return 1;
 686 }
 687
 688 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 689 {
 690         unsigned wide_sample, sample, channel, byte;
 691
 692         if(bps == 8) {
 693                 if(is_unsigned_samples) {
 694                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 695                                 for(channel = 0; channel < channels; channel++, sample++)
 696                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 0x80;
 697                 }
 698                 else {
 699                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 700                                 for(channel = 0; channel < channels; channel++, sample++)
 701                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 702                 }
 703         }
 704         else if(bps == 16) {
 705                 if(is_big_endian != is_big_endian_host) {
 706                         unsigned char tmp;
 707                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 708                         for(byte = 0; byte < bytes; byte += 2) {
 709                                 tmp = ucbuffer[byte];
 710                                 ucbuffer[byte] = ucbuffer[byte+1];
 711                                 ucbuffer[byte+1] = tmp;
 712                         }
 713                 }
 714                 if(is_unsigned_samples) {
 715                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 716                                 for(channel = 0; channel < channels; channel++, sample++)
 717                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 0x8000;
 718                 }
 719                 else {
 720                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 721                                 for(channel = 0; channel < channels; channel++, sample++)
 722                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 723                 }
 724         }
 725         else if(bps == 24) {
 726                 if(!is_big_endian) {
 727                         unsigned char tmp;
 728                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 729                         for(byte = 0; byte < bytes; byte += 3) {
 730                                 tmp = ucbuffer[byte];
 731                                 ucbuffer[byte] = ucbuffer[byte+2];
 732                                 ucbuffer[byte+2] = tmp;
 733                         }
 734                 }
 735                 if(is_unsigned_samples) {
 736                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 737                                 for(channel = 0; channel < channels; channel++, sample++) {
 738                                         input[channel][wide_sample]  = ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 739                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 740                                         input[channel][wide_sample] |= ucbuffer[byte++];
 741                                         input[channel][wide_sample] -= 0x800000;
 742                                 }
 743                 }
 744                 else {
 745                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 746                                 for(channel = 0; channel < channels; channel++, sample++) {
 747                                         input[channel][wide_sample]  = scbuffer[byte++]; input[channel][wide_sample] <<= 8;
 748                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
 749                                         input[channel][wide_sample] |= ucbuffer[byte++];
 750                                 }
 751                 }
 752         }
 753         else {
 754                 assert(0);
 755         }
 756
 757         if(encoder_wrapper->verify) {
 758                 for(channel = 0; channel < channels; channel++)
 759                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 760                 encoder_wrapper->verify_fifo.tail += wide_samples;
 761                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 762         }
 763 }
 764
 765 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 766 {
 767         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 768         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 769
 770         /* mark the current seek point if hit (if stream_offset == 0 that means we're still writing metadata and haven't hit the first frame yet) */
 771         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
 772                 uint64 current_sample = (uint64)current_frame * (uint64)encoder->blocksize, test_sample;
 773                 unsigned i;
 774                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
 775                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
 776                         if(test_sample > current_sample) {
 777                                 break;
 778                         }
 779                         else if(test_sample == current_sample) {
 780                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
 781                                 encoder_wrapper->seek_table.points[i].frame_samples = encoder->blocksize;
 782                                 encoder_wrapper->first_seek_point_to_check++;
 783                                 break;
 784                         }
 785                         else {
 786                                 encoder_wrapper->first_seek_point_to_check++;
 787                         }
 788                 }
 789         }
 790
 791         encoder_wrapper->bytes_written += bytes;
 792         encoder_wrapper->samples_written += samples;
 793         encoder_wrapper->current_frame = current_frame;
 794
 795         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 796                 print_stats(encoder_wrapper);
 797
 798         if(encoder_wrapper->verify) {
 799                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 800                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 801                 if(encoder_wrapper->verify_fifo.into_frames) {
 802                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 803                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 804                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 805                         }
 806                 }
 807                 else {
 808                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 809                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 810                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 811                         }
 812                 }
 813         }
 814
 815         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 816                 return FLAC__ENCODER_WRITE_OK;
 817         else
 818                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 819 }
 820
 821 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 822 {
 823         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 824         byte b;
 825         FILE *f;
 826         const uint64 samples = metadata->data.stream_info.total_samples;
 827         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
 828         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
 829
 830         assert(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
 831
 832         /*
 833          * we get called by the encoder when the encoding process has
 834          * finished so that we can update the STREAMINFO and SEEKTABLE
 835          * blocks.
 836          */
 837
 838         (void)encoder; /* silence compiler warning about unused parameter */
 839
 840         if(encoder_wrapper->fout == stdout)
 841                 return;
 842
 843         fclose(encoder_wrapper->fout);
 844         if(0 == (f = fopen(encoder_wrapper->outfilename, "r+b")))
 845                 return;
 846
 847         /* all this is based on intimate knowledge of the stream header
 848          * layout, but a change to the header format that would break this
 849          * would also break all streams encoded in the previous format.
 850          */
 851
 852         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 853         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
 854
 855 samples_:
 856         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 857         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 858         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 859         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 860         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 861         b = (byte)((samples >> 24) & 0xFF);
 862         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 863         b = (byte)((samples >> 16) & 0xFF);
 864         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 865         b = (byte)((samples >> 8) & 0xFF);
 866         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 867         b = (byte)(samples & 0xFF);
 868         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 869
 870 framesize_:
 871         if(-1 == fseek(f, 12, SEEK_SET)) goto seektable_;
 872         b = (byte)((min_framesize >> 16) & 0xFF);
 873         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 874         b = (byte)((min_framesize >> 8) & 0xFF);
 875         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 876         b = (byte)(min_framesize & 0xFF);
 877         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 878         b = (byte)((max_framesize >> 16) & 0xFF);
 879         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 880         b = (byte)((max_framesize >> 8) & 0xFF);
 881         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 882         b = (byte)(max_framesize & 0xFF);
 883         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
 884
 885 seektable_:
 886         if(encoder_wrapper->seek_table.num_points > 0) {
 887                 long pos;
 888                 unsigned i;
 889
 890                 /* convert any unused seek points to placeholders */
 891                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
 892                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
 893                                 break;
 894                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
 895                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
 896                 }
 897
 898                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
 899                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
 900                 pos += metadata->length;
 901                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
 902                 if(-1 == fseek(f, pos, SEEK_SET)) goto end_;
 903                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
 904                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
 905                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
 906                         if(!write_big_endian_uint16(f, encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
 907                 }
 908         }
 909
 910 end_:
 911         fclose(f);
 912         return;
 913 }
 914
 915 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 916 {
 917         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 918         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 919         (void)decoder;
 920
 921         if(encoded_bytes <= *bytes) {
 922                 *bytes = encoded_bytes;
 923                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 924         }
 925         else {
 926                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 927                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
 928                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
 929         }
 930
 931         return FLAC__STREAM_DECODER_READ_CONTINUE;
 932 }
 933
 934 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
 935 {
 936         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 937         unsigned channel, l, r;
 938
 939         for(channel = 0; channel < decoder->channels; channel++) {
 940                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 941                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 942                         fprintf(stderr, "       Please submit a bug report to\n");
 943                         fprintf(stderr, "           http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 944                         fprintf(stderr, "       Make sure to include an email contact in the comment and/or use the\n");
 945                         fprintf(stderr, "       \"Monitor\" feature to monitor the bug status.\n");
 946                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 947                 }
 948         }
 949         /* dequeue the frame from the fifo */
 950         for(channel = 0; channel < decoder->channels; channel++) {
 951                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 952                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 953                 }
 954         }
 955         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
 956         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 957 }
 958
 959 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 960 {
 961         (void)decoder;
 962         (void)metadata;
 963         (void)client_data;
 964 }
 965
 966 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 967 {
 968         (void)decoder;
 969         (void)client_data;
 970         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 971 }
 972
 973 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 974 {
 975 #ifdef _MSC_VER
 976         /* with VC++ you have to spoon feed it the casting */
 977         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 978 #else
 979         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 980 #endif
 981         fprintf(stderr, "\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 982                 progress * 100.0, encoder_wrapper->current_frame,
 983                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 984 #ifdef _MSC_VER
 985                 /* with VC++ you have to spoon feed it the casting */
 986                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 987 #else
 988                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 989 #endif
 990         );
 991 }
 992
 993 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 994 {
 995         size_t bytes_read = fread(val, 1, 2, f);
 996
 997         if(bytes_read == 0) {
 998                 if(!eof_ok) {
 999                         fprintf(stderr, "ERROR: unexpected EOF\n");
1000                         return false;
1001                 }
1002                 else
1003                         return true;
1004         }
1005         else if(bytes_read < 2) {
1006                 fprintf(stderr, "ERROR: unexpected EOF\n");
1007                 return false;
1008         }
1009         else {
1010                 if(is_big_endian_host) {
1011                         byte tmp, *b = (byte*)val;
1012                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1013                 }
1014                 return true;
1015         }
1016 }
1017
1018 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
1019 {
1020         size_t bytes_read = fread(val, 1, 4, f);
1021
1022         if(bytes_read == 0) {
1023                 if(!eof_ok) {
1024                         fprintf(stderr, "ERROR: unexpected EOF\n");
1025                         return false;
1026                 }
1027                 else
1028                         return true;
1029         }
1030         else if(bytes_read < 4) {
1031                 fprintf(stderr, "ERROR: unexpected EOF\n");
1032                 return false;
1033         }
1034         else {
1035                 if(is_big_endian_host) {
1036                         byte tmp, *b = (byte*)val;
1037                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1038                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1039                 }
1040                 return true;
1041         }
1042 }
1043
1044 bool write_big_endian_uint16(FILE *f, uint16 val)
1045 {
1046         if(!is_big_endian_host) {
1047                 byte *b = (byte *)&val, tmp;
1048                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1049         }
1050         return fwrite(&val, 1, 2, f) == 2;
1051 }
1052
1053 bool write_big_endian_uint64(FILE *f, uint64 val)
1054 {
1055         if(!is_big_endian_host) {
1056                 byte *b = (byte *)&val, tmp;
1057                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1058                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1059                 tmp = b[2]; b[2] = b[5]; b[3] = tmp;
1060                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1061         }
1062         return fwrite(&val, 1, 8, f) == 8;
1063 }