src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006  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 #if HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #if defined _WIN32 && !defined __CYGWIN__
  24 /* where MSVC puts unlink() */
  25 # include <io.h>
  26 #else
  27 # include <unistd.h>
  28 #endif
  29 #if defined _MSC_VER || defined __MINGW32__
  30 #include <sys/types.h> /* for off_t */
  31 #if _MSC_VER <= 1200 /* @@@ [2G limit] */
  32 #define fseeko fseek
  33 #define ftello ftell
  34 #endif
  35 #endif
  36 #include <errno.h>
  37 #include <limits.h> /* for LONG_MAX */
  38 #include <math.h> /* for floor() */
  39 #include <stdio.h> /* for FILE etc. */
  40 #include <stdlib.h> /* for malloc */
  41 #include <string.h> /* for strcmp(), strerror( */
  42 #include "FLAC/all.h"
  43 #include "share/grabbag.h"
  44 #include "encode.h"
  45
  46 #ifdef min
  47 #undef min
  48 #endif
  49 #define min(x,y) ((x)<(y)?(x):(y))
  50 #ifdef max
  51 #undef max
  52 #endif
  53 #define max(x,y) ((x)>(y)?(x):(y))
  54
  55 /* this MUST be >= 588 so that sector aligning can take place with one read */
  56 #define CHUNK_OF_SAMPLES 2048
  57
  58 typedef struct {
  59 #ifdef FLAC__HAS_OGG
  60         FLAC__bool use_ogg;
  61 #endif
  62         FLAC__bool verify;
  63         FLAC__bool is_stdout;
  64         FLAC__bool outputfile_opened; /* true if we successfully opened the output file and we want it to be deleted if there is an error */
  65         const char *inbasefilename;
  66         const char *outfilename;
  67
  68         FLAC__uint64 skip;
  69         FLAC__uint64 until; /* a value of 0 mean end-of-stream (i.e. --until=-0) */
  70         FLAC__bool replay_gain;
  71         unsigned channels;
  72         unsigned bits_per_sample;
  73         unsigned sample_rate;
  74         FLAC__uint64 unencoded_size;
  75         FLAC__uint64 total_samples_to_encode;
  76         FLAC__uint64 bytes_written;
  77         FLAC__uint64 samples_written;
  78         unsigned stats_mask;
  79
  80         FLAC__StreamEncoder *encoder;
  81
  82         FILE *fin;
  83         FLAC__StreamMetadata *seek_table_template;
  84 } EncoderSession;
  85
  86 /* this is data attached to the FLAC decoder when encoding from a FLAC file */
  87 typedef struct {
  88         EncoderSession *encoder_session;
  89         off_t filesize;
  90         const FLAC__byte *lookahead;
  91         unsigned lookahead_length;
  92         size_t num_metadata_blocks;
  93         FLAC__StreamMetadata *metadata_blocks[1024]; /*@@@ BAD MAGIC number */
  94         FLAC__uint64 samples_left_to_process;
  95         FLAC__bool fatal_error;
  96 } FLACDecoderData;
  97
  98 const int FLAC_ENCODE__DEFAULT_PADDING = 8192;
  99
 100 static FLAC__bool is_big_endian_host_;
 101
 102 static unsigned char ucbuffer_[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE+7)/8)];
 103 static signed char *scbuffer_ = (signed char *)ucbuffer_;
 104 static FLAC__uint16 *usbuffer_ = (FLAC__uint16 *)ucbuffer_;
 105 static FLAC__int16 *ssbuffer_ = (FLAC__int16 *)ucbuffer_;
 106
 107 static FLAC__int32 in_[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
 108 static FLAC__int32 *input_[FLAC__MAX_CHANNELS];
 109
 110
 111 /*
 112  * unpublished debug routines from the FLAC libs
 113  */
 114 extern FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
 115 extern FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
 116 extern FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value);
 117
 118 /*
 119  * local routines
 120  */
 121 static FLAC__bool EncoderSession_construct(EncoderSession *e, FLAC__bool use_ogg, FLAC__bool verify, FILE *infile, const char *infilename, const char *outfilename);
 122 static void EncoderSession_destroy(EncoderSession *e);
 123 static int EncoderSession_finish_ok(EncoderSession *e, int info_align_carry, int info_align_zero);
 124 static int EncoderSession_finish_error(EncoderSession *e);
 125 static FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t options, FLAC__uint32 channel_mask, unsigned channels, unsigned bps, unsigned sample_rate, FLACDecoderData *flac_decoder_data);
 126 static FLAC__bool EncoderSession_process(EncoderSession *e, const FLAC__int32 * const buffer[], unsigned samples);
 127 static FLAC__bool convert_to_seek_table_template(const char *requested_seek_points, int num_requested_seek_points, FLAC__StreamMetadata *cuesheet, EncoderSession *e);
 128 static FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input);
 129 static FLAC__bool verify_metadata(const EncoderSession *e, FLAC__StreamMetadata **metadata, unsigned num_metadata);
 130 static FLAC__bool format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned shift, size_t *channel_map);
 131 static void encoder_progress_callback(const FLAC__StreamEncoder *encoder, FLAC__uint64 bytes_written, FLAC__uint64 samples_written, unsigned frames_written, unsigned total_frames_estimate, void *client_data);
 132 static FLAC__StreamDecoderReadStatus flac_decoder_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
 133 static FLAC__StreamDecoderSeekStatus flac_decoder_seek_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
 134 static FLAC__StreamDecoderTellStatus flac_decoder_tell_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
 135 static FLAC__StreamDecoderLengthStatus flac_decoder_length_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
 136 static FLAC__bool flac_decoder_eof_callback(const FLAC__StreamDecoder *decoder, void *client_data);
 137 static FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 138 static void flac_decoder_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 139 static void flac_decoder_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 140 static FLAC__bool parse_cuesheet(FLAC__StreamMetadata **cuesheet, const char *cuesheet_filename, const char *inbasefilename, FLAC__bool is_cdda, FLAC__uint64 lead_out_offset);
 141 static void print_stats(const EncoderSession *encoder_session);
 142 static void print_error_with_init_status(const EncoderSession *e, const char *message, FLAC__StreamEncoderInitStatus init_status);
 143 static void print_error_with_state(const EncoderSession *e, const char *message);
 144 static void print_verify_error(EncoderSession *e);
 145 static FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
 146 static FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
 147 static FLAC__bool read_big_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
 148 static FLAC__bool read_big_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
 149 static FLAC__bool read_sane_extended(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
 150 static FLAC__bool fskip_ahead(FILE *f, FLAC__uint64 offset);
 151 static unsigned count_channel_mask_bits(FLAC__uint32 mask);
 152 static FLAC__uint32 limit_channel_mask(FLAC__uint32 mask, unsigned channels);
 153
 154 /*
 155  * public routines
 156  */
 157 int flac__encode_aif(FILE *infile, off_t infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, wav_encode_options_t options, FLAC__bool is_aifc)
 158 {
 159         EncoderSession encoder_session;
 160         FLAC__uint16 x;
 161         FLAC__uint32 xx;
 162         unsigned int channels= 0U, bps= 0U, shift= 0U, sample_rate= 0U, sample_frames= 0U;
 163         size_t channel_map[FLAC__MAX_CHANNELS];
 164         FLAC__bool got_comm_chunk= false, got_ssnd_chunk= false;
 165         int info_align_carry= -1, info_align_zero= -1;
 166         FLAC__bool is_big_endian_pcm = true;
 167
 168         (void)infilesize; /* silence compiler warning about unused parameter */
 169         (void)lookahead; /* silence compiler warning about unused parameter */
 170         (void)lookahead_length; /* silence compiler warning about unused parameter */
 171
 172         if(!
 173                 EncoderSession_construct(
 174                         &encoder_session,
 175 #ifdef FLAC__HAS_OGG
 176                         options.common.use_ogg,
 177 #else
 178                         /*use_ogg=*/false,
 179 #endif
 180                         options.common.verify,
 181                         infile,
 182                         infilename,
 183                         outfilename
 184                 )
 185         )
 186                 return 1;
 187
 188         /* initialize default channel map that preserves channel order */
 189         {
 190                 size_t i;
 191                 for(i = 0; i < sizeof(channel_map)/sizeof(channel_map[0]); i++)
 192                         channel_map[i] = i;
 193         }
 194
 195         /* lookahead[] already has "FORMxxxxAIFF", do sub-chunks */
 196
 197         while(1) {
 198                 size_t c= 0U;
 199                 char chunk_id[5] = { '\0', '\0', '\0', '\0', '\0' }; /* one extra byte for terminating NUL so we can also treat it like a C string */
 200
 201                 /* chunk identifier; really conservative about behavior of fread() and feof() */
 202                 if(feof(infile) || ((c= fread(chunk_id, 1U, 4U, infile)), c==0U && feof(infile)))
 203                         break;
 204                 else if(c<4U || feof(infile)) {
 205                         flac__utils_printf(stderr, 1, "%s: ERROR: incomplete chunk identifier\n", encoder_session.inbasefilename);
 206                         return EncoderSession_finish_error(&encoder_session);
 207                 }
 208
 209                 if(got_comm_chunk==false && !memcmp(chunk_id, "COMM", 4)) { /* common chunk */
 210                         unsigned long skip;
 211                         const FLAC__uint32 minimum_comm_size = (is_aifc? 22 : 18);
 212
 213                         /* COMM chunk size */
 214                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 215                                 return EncoderSession_finish_error(&encoder_session);
 216                         else if(xx<minimum_comm_size) {
 217                                 flac__utils_printf(stderr, 1, "%s: ERROR: non-standard %s 'COMM' chunk has length = %u\n", encoder_session.inbasefilename, is_aifc? "AIFF-C" : "AIFF", (unsigned int)xx);
 218                                 return EncoderSession_finish_error(&encoder_session);
 219                         }
 220                         else if(!is_aifc && xx!=minimum_comm_size) {
 221                                 flac__utils_printf(stderr, 1, "%s: WARNING: non-standard %s 'COMM' chunk has length = %u, expected %u\n", encoder_session.inbasefilename, is_aifc? "AIFF-C" : "AIFF", (unsigned int)xx, minimum_comm_size);
 222                         }
 223                         skip= (xx-minimum_comm_size)+(xx & 1U);
 224
 225                         /* number of channels */
 226                         if(!read_big_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 227                                 return EncoderSession_finish_error(&encoder_session);
 228                         else if(x==0U || x>FLAC__MAX_CHANNELS) {
 229                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported number channels %u\n", encoder_session.inbasefilename, (unsigned int)x);
 230                                 return EncoderSession_finish_error(&encoder_session);
 231                         }
 232                         else if(x>2U && !options.common.channel_map_none) {
 233                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported number channels %u for AIFF\n", encoder_session.inbasefilename, (unsigned int)x);
 234                                 return EncoderSession_finish_error(&encoder_session);
 235                         }
 236                         else if(options.common.sector_align && x!=2U) {
 237                                 flac__utils_printf(stderr, 1, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_session.inbasefilename, (unsigned int)x);
 238                                 return EncoderSession_finish_error(&encoder_session);
 239                         }
 240                         channels= x;
 241
 242                         /* number of sample frames */
 243                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 244                                 return EncoderSession_finish_error(&encoder_session);
 245                         sample_frames= xx;
 246
 247                         /* bits per sample */
 248                         if(!read_big_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 249                                 return EncoderSession_finish_error(&encoder_session);
 250                         else if(x<4U || x>24U) {
 251                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported bits-per-sample %u\n", encoder_session.inbasefilename, (unsigned int)x);
 252                                 return EncoderSession_finish_error(&encoder_session);
 253                         }
 254                         else if(options.common.sector_align && x!=16U) {
 255                                 flac__utils_printf(stderr, 1, "%s: ERROR: file has %u bits-per-sample, must be 16 for --sector-align\n", encoder_session.inbasefilename, (unsigned int)x);
 256                                 return EncoderSession_finish_error(&encoder_session);
 257                         }
 258                         bps= x;
 259                         shift= (bps%8)? 8-(bps%8) : 0; /* SSND data is always byte-aligned, left-justified but format_input() will double-check */
 260                         bps+= shift;
 261
 262                         /* sample rate */
 263                         if(!read_sane_extended(infile, &xx, false, encoder_session.inbasefilename))
 264                                 return EncoderSession_finish_error(&encoder_session);
 265                         else if(!FLAC__format_sample_rate_is_valid(xx)) {
 266                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported sample rate %u\n", encoder_session.inbasefilename, (unsigned int)xx);
 267                                 return EncoderSession_finish_error(&encoder_session);
 268                         }
 269                         else if(options.common.sector_align && xx!=44100U) {
 270                                 flac__utils_printf(stderr, 1, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_session.inbasefilename, (unsigned int)xx);
 271                                 return EncoderSession_finish_error(&encoder_session);
 272                         }
 273                         sample_rate= xx;
 274
 275                         /* check compression type for AIFF-C */
 276                         if(is_aifc) {
 277                                 if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 278                                         return EncoderSession_finish_error(&encoder_session);
 279                                 if(xx == 0x736F7774) /* "sowt" */
 280                                         is_big_endian_pcm = false;
 281                                 else if(xx == 0x4E4F4E45) /* "NONE" */
 282                                         ; /* nothing to do, we already default to big-endian */
 283                                 else {
 284                                         flac__utils_printf(stderr, 1, "%s: ERROR: can't handle AIFF-C compression type \"%c%c%c%c\"\n", encoder_session.inbasefilename, (char)(xx>>24), (char)((xx>>16)&8), (char)((xx>>8)&8), (char)(xx&8));
 285                                         return EncoderSession_finish_error(&encoder_session);
 286                                 }
 287                         }
 288
 289                         /* set channel mapping */
 290                         /* FLAC order follows SMPTE and WAVEFORMATEXTENSIBLE but with fewer channels, which are: */
 291                         /* front left, front right, center, LFE, back left, back right, surround left, surround right */
 292                         /* specs say the channel ordering is:
 293                          *                             1     2   3   4   5   6
 294                          * ___________________________________________________
 295                          * 2         stereo            l     r
 296                          * 3                           l     r   c
 297                          * 4                           l     c   r   S
 298                          * quad (ambiguous with 4ch)  Fl    Fr   Bl  Br
 299                          * 5                          Fl     Fr  Fc  Sl  Sr
 300                          * 6                           l     lc  c   r   rc  S
 301                          * l:left r:right c:center Fl:front-left Fr:front-right Bl:back-left Br:back-right Lc:left-center Rc:right-center S:surround
 302                          * so we only have unambiguous mappings for 2, 3, and 5 channels
 303                          */
 304                         if(
 305                                 options.common.channel_map_none ||
 306                                 channels == 1 || /* 1 channel: (mono) */
 307                                 channels == 2 || /* 2 channels: left, right */
 308                                 channels == 3 || /* 3 channels: left, right, center */
 309                                 channels == 5    /* 5 channels: front left, front right, center, surround left, surround right */
 310                         ) {
 311                                 /* keep default channel order */
 312                         }
 313                         else {
 314                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported number channels %u for AIFF\n", encoder_session.inbasefilename, channels);
 315                                 return EncoderSession_finish_error(&encoder_session);
 316                         }
 317
 318                         /* skip any extra data in the COMM chunk */
 319                         if(!fskip_ahead(infile, skip)) {
 320                                 flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping extra COMM data\n", encoder_session.inbasefilename);
 321                                 return EncoderSession_finish_error(&encoder_session);
 322                         }
 323
 324                         /*
 325                          * now that we know the sample rate, canonicalize the
 326                          * --skip string to a number of samples:
 327                          */
 328                         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, sample_rate);
 329                         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
 330                         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
 331                         FLAC__ASSERT(!options.common.sector_align || encoder_session.skip == 0);
 332
 333                         got_comm_chunk= true;
 334                 }
 335                 else if(got_ssnd_chunk==false && !memcmp(chunk_id, "SSND", 4)) { /* sound data chunk */
 336                         unsigned int offset= 0U, block_size= 0U, align_remainder= 0U, data_bytes;
 337                         size_t bytes_per_frame= channels*(bps>>3);
 338                         FLAC__uint64 total_samples_in_input, trim = 0;
 339                         FLAC__bool pad= false;
 340
 341                         if(got_comm_chunk==false) {
 342                                 flac__utils_printf(stderr, 1, "%s: ERROR: got 'SSND' chunk before 'COMM' chunk\n", encoder_session.inbasefilename);
 343                                 return EncoderSession_finish_error(&encoder_session);
 344                         }
 345
 346                         /* SSND chunk size */
 347                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 348                                 return EncoderSession_finish_error(&encoder_session);
 349                         data_bytes= xx;
 350                         pad= (data_bytes & 1U) ? true : false;
 351                         data_bytes-= 8U; /* discount the offset and block size fields */
 352
 353                         /* offset */
 354                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 355                                 return EncoderSession_finish_error(&encoder_session);
 356                         offset= xx;
 357                         data_bytes-= offset;
 358
 359                         /* block size */
 360                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 361                                 return EncoderSession_finish_error(&encoder_session);
 362                         else if(xx!=0U) {
 363                                 flac__utils_printf(stderr, 1, "%s: ERROR: block size is %u; must be 0\n", encoder_session.inbasefilename, (unsigned int)xx);
 364                                 return EncoderSession_finish_error(&encoder_session);
 365                         }
 366                         block_size= xx;
 367
 368                         /* skip any SSND offset bytes */
 369                         FLAC__ASSERT(offset<=LONG_MAX);
 370                         if(!fskip_ahead(infile, offset)) {
 371                                 flac__utils_printf(stderr, 1, "%s: ERROR: skipping offset in SSND chunk\n", encoder_session.inbasefilename);
 372                                 return EncoderSession_finish_error(&encoder_session);
 373                         }
 374                         if(data_bytes!=(sample_frames*bytes_per_frame)) {
 375                                 flac__utils_printf(stderr, 1, "%s: ERROR: SSND chunk size inconsistent with sample frame count\n", encoder_session.inbasefilename);
 376                                 return EncoderSession_finish_error(&encoder_session);
 377                         }
 378
 379                         /* *options.common.align_reservoir_samples will be 0 unless --sector-align is used */
 380                         FLAC__ASSERT(options.common.sector_align || *options.common.align_reservoir_samples == 0);
 381                         total_samples_in_input = data_bytes / bytes_per_frame + *options.common.align_reservoir_samples;
 382
 383                         /*
 384                          * now that we know the input size, canonicalize the
 385                          * --until string to an absolute sample number:
 386                          */
 387                         if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, sample_rate, encoder_session.skip, total_samples_in_input))
 388                                 return EncoderSession_finish_error(&encoder_session);
 389                         encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
 390                         FLAC__ASSERT(!options.common.sector_align || encoder_session.until == 0);
 391
 392                         if(encoder_session.skip>0U) {
 393                                 if(!fskip_ahead(infile, encoder_session.skip*bytes_per_frame)) {
 394                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 395                                         return EncoderSession_finish_error(&encoder_session);
 396                                 }
 397                         }
 398
 399                         data_bytes-= (unsigned int)encoder_session.skip*bytes_per_frame; /*@@@ WATCHOUT: 4GB limit */
 400                         encoder_session.total_samples_to_encode= total_samples_in_input - encoder_session.skip;
 401                         if(encoder_session.until > 0) {
 402                                 trim = total_samples_in_input - encoder_session.until;
 403                                 FLAC__ASSERT(total_samples_in_input > 0);
 404                                 FLAC__ASSERT(!options.common.sector_align);
 405                                 data_bytes-= (unsigned int)trim*bytes_per_frame;
 406                                 encoder_session.total_samples_to_encode-= trim;
 407                         }
 408                         if(options.common.sector_align) {
 409                                 align_remainder= (unsigned int)(encoder_session.total_samples_to_encode % 588U);
 410                                 if(options.common.is_last_file)
 411                                         encoder_session.total_samples_to_encode+= (588U-align_remainder); /* will pad with zeroes */
 412                                 else
 413                                         encoder_session.total_samples_to_encode-= align_remainder; /* will stop short and carry over to next file */
 414                         }
 415
 416                         /* +54 for the size of the AIFF headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 417                         encoder_session.unencoded_size= encoder_session.total_samples_to_encode*bytes_per_frame+54;
 418
 419                         if(!EncoderSession_init_encoder(&encoder_session, options.common, /*channel_mask=*/0, channels, bps-shift, sample_rate, /*flac_decoder_data=*/0))
 420                                 return EncoderSession_finish_error(&encoder_session);
 421
 422                         /* first do any samples in the reservoir */
 423                         if(options.common.sector_align && *options.common.align_reservoir_samples>0U) {
 424
 425                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 *const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 426                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 427                                         return EncoderSession_finish_error(&encoder_session);
 428                                 }
 429                         }
 430
 431                         /* decrement the data_bytes counter if we need to align the file */
 432                         if(options.common.sector_align) {
 433                                 if(options.common.is_last_file)
 434                                         *options.common.align_reservoir_samples= 0U;
 435                                 else {
 436                                         *options.common.align_reservoir_samples= align_remainder;
 437                                         data_bytes-= (*options.common.align_reservoir_samples)*bytes_per_frame;
 438                                 }
 439                         }
 440
 441                         /* now do from the file */
 442                         while(data_bytes>0) {
 443                                 size_t bytes_read= fread(ucbuffer_, 1U, min(data_bytes, CHUNK_OF_SAMPLES*bytes_per_frame), infile);
 444
 445                                 if(bytes_read==0U) {
 446                                         if(ferror(infile)) {
 447                                                 flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
 448                                                 return EncoderSession_finish_error(&encoder_session);
 449                                         }
 450                                         else if(feof(infile)) {
 451                                                 flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned int)encoder_session.total_samples_to_encode, (unsigned int)encoder_session.samples_written);
 452                                                 data_bytes= 0;
 453                                         }
 454                                 }
 455                                 else {
 456                                         if(bytes_read % bytes_per_frame != 0U) {
 457                                                 flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
 458                                                 return EncoderSession_finish_error(&encoder_session);
 459                                         }
 460                                         else {
 461                                                 unsigned int frames= bytes_read/bytes_per_frame;
 462                                                 if(!format_input(input_, frames, is_big_endian_pcm, /*is_unsigned_samples=*/false, channels, bps, shift, channel_map))
 463                                                         return EncoderSession_finish_error(&encoder_session);
 464
 465                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 *const *)input_, frames)) {
 466                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 467                                                         return EncoderSession_finish_error(&encoder_session);
 468                                                 }
 469                                                 else
 470                                                         data_bytes-= bytes_read;
 471                                         }
 472                                 }
 473                         }
 474
 475                         if(trim>0) {
 476                                 FLAC__ASSERT(!options.common.sector_align);
 477                                 if(!fskip_ahead(infile, trim*bytes_per_frame)) {
 478                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 479                                         return EncoderSession_finish_error(&encoder_session);
 480                                 }
 481                         }
 482
 483                         /* now read unaligned samples into reservoir or pad with zeroes if necessary */
 484                         if(options.common.sector_align) {
 485                                 if(options.common.is_last_file) {
 486                                         unsigned int pad_frames= 588U-align_remainder;
 487
 488                                         if(pad_frames<588U) {
 489                                                 unsigned int i;
 490
 491                                                 info_align_zero= pad_frames;
 492                                                 for(i= 0U; i<channels; ++i)
 493                                                         memset(input_[i], 0, sizeof(input_[0][0])*pad_frames);
 494
 495                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 *const *)input_, pad_frames)) {
 496                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 497                                                         return EncoderSession_finish_error(&encoder_session);
 498                                                 }
 499                                         }
 500                                 }
 501                                 else {
 502                                         if(*options.common.align_reservoir_samples > 0) {
 503                                                 size_t bytes_read= fread(ucbuffer_, 1U, (*options.common.align_reservoir_samples)*bytes_per_frame, infile);
 504
 505                                                 FLAC__ASSERT(CHUNK_OF_SAMPLES>=588U);
 506                                                 if(bytes_read==0U && ferror(infile)) {
 507                                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
 508                                                         return EncoderSession_finish_error(&encoder_session);
 509                                                 }
 510                                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_frame) {
 511                                                         flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned int)bytes_read, (unsigned int)encoder_session.total_samples_to_encode, (unsigned int)encoder_session.samples_written);
 512                                                 }
 513                                                 else {
 514                                                         info_align_carry= *options.common.align_reservoir_samples;
 515                                                         if(!format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, is_big_endian_pcm, /*is_unsigned_samples=*/false, channels, bps, shift, channel_map))
 516                                                                 return EncoderSession_finish_error(&encoder_session);
 517                                                 }
 518                                         }
 519                                 }
 520                         }
 521
 522                         if(pad==true) {
 523                                 unsigned char tmp;
 524
 525                                 if(fread(&tmp, 1U, 1U, infile)<1U) {
 526                                         flac__utils_printf(stderr, 1, "%s: ERROR during read of SSND pad byte\n", encoder_session.inbasefilename);
 527                                         return EncoderSession_finish_error(&encoder_session);
 528                                 }
 529                         }
 530
 531                         got_ssnd_chunk= true;
 532                 }
 533                 else { /* other chunk */
 534                         if(!memcmp(chunk_id, "COMM", 4)) {
 535                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'COMM' chunk\n", encoder_session.inbasefilename);
 536                         }
 537                         else if(!memcmp(chunk_id, "SSND", 4)) {
 538                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'SSND' chunk\n", encoder_session.inbasefilename);
 539                         }
 540                         else {
 541                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping unknown chunk '%s'\n", encoder_session.inbasefilename, chunk_id);
 542                         }
 543
 544                         /* chunk size */
 545                         if(!read_big_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 546                                 return EncoderSession_finish_error(&encoder_session);
 547                         else {
 548                                 unsigned long skip= xx+(xx & 1U);
 549
 550                                 FLAC__ASSERT(skip<=LONG_MAX);
 551                                 if(!fskip_ahead(infile, skip)) {
 552                                         fprintf(stderr, "%s: ERROR during read while skipping unknown chunk\n", encoder_session.inbasefilename);
 553                                         return EncoderSession_finish_error(&encoder_session);
 554                                 }
 555                         }
 556                 }
 557         }
 558
 559         if(got_ssnd_chunk==false && sample_frames!=0U) {
 560                 flac__utils_printf(stderr, 1, "%s: ERROR: missing SSND chunk\n", encoder_session.inbasefilename);
 561                 return EncoderSession_finish_error(&encoder_session);
 562         }
 563
 564         return EncoderSession_finish_ok(&encoder_session, info_align_carry, info_align_zero);
 565 }
 566
 567 int flac__encode_wav(FILE *infile, off_t infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, wav_encode_options_t options)
 568 {
 569         EncoderSession encoder_session;
 570         FLAC__bool is_unsigned_samples = false;
 571         unsigned channels = 0, bps = 0, sample_rate = 0, shift = 0;
 572         size_t bytes_per_wide_sample, bytes_read;
 573         size_t channel_map[FLAC__MAX_CHANNELS];
 574         FLAC__uint16 x, format; /* format is the wFormatTag word from the 'fmt ' chunk */
 575         FLAC__uint32 xx, channel_mask = 0;
 576         FLAC__bool got_fmt_chunk = false, got_data_chunk = false;
 577         unsigned align_remainder = 0;
 578         int info_align_carry = -1, info_align_zero = -1;
 579
 580         (void)infilesize;
 581         (void)lookahead;
 582         (void)lookahead_length;
 583
 584         if(!
 585                 EncoderSession_construct(
 586                         &encoder_session,
 587 #ifdef FLAC__HAS_OGG
 588                         options.common.use_ogg,
 589 #else
 590                         /*use_ogg=*/false,
 591 #endif
 592                         options.common.verify,
 593                         infile,
 594                         infilename,
 595                         outfilename
 596                 )
 597         )
 598                 return 1;
 599
 600         /* initialize default channel map that preserves channel order */
 601         {
 602                 size_t i;
 603                 for(i = 0; i < sizeof(channel_map)/sizeof(channel_map[0]); i++)
 604                         channel_map[i] = i;
 605         }
 606
 607         /*
 608          * lookahead[] already has "RIFFxxxxWAVE", do sub-chunks
 609          */
 610         while(!feof(infile)) {
 611                 if(!read_little_endian_uint32(infile, &xx, true, encoder_session.inbasefilename))
 612                         return EncoderSession_finish_error(&encoder_session);
 613                 if(feof(infile))
 614                         break;
 615                 if(xx == 0x20746d66 && !got_fmt_chunk) { /* "fmt " */
 616                         unsigned block_align, data_bytes;
 617
 618                         /* see
 619                          *   http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html
 620                          *   http://windowssdk.msdn.microsoft.com/en-us/library/ms713497.aspx
 621                          *   http://msdn.microsoft.com/library/default.asp?url=/library/en-us/audio_r/hh/Audio_r/aud-prop_d40f094e-44f9-4baa-8a15-03e4fb369501.xml.asp
 622                          *
 623                          * WAVEFORMAT is
 624                          * 4 byte: subchunk size
 625                          * 2 byte: format type: 1 for WAVE_FORMAT_PCM, 65534 for WAVE_FORMAT_EXTENSIBLE
 626                          * 2 byte: # channels
 627                          * 4 byte: sample rate (Hz)
 628                          * 4 byte: avg bytes per sec
 629                          * 2 byte: block align
 630                          * 2 byte: bits per sample (not necessarily all significant)
 631                          * WAVEFORMAT adds
 632                          * 2 byte: extension size in bytes (usually 0 for WAVEFORMATEX and 22 for WAVEFORMATEXTENSIBLE with PCM)
 633                          * WAVEFORMATEXTENSIBLE adds
 634                          * 2 byte: valid bits per sample
 635                          * 4 byte: channel mask
 636                          * 16 byte: subformat GUID, first 2 bytes have format type, 1 being PCM
 637                          *
 638                          * Current spec says WAVEFORMATEX with PCM must have bps == 8 or 16, or any multiple of 8 for WAVEFORMATEXTENSIBLE.
 639                          * Lots of old broken WAVEs/apps have don't follow it, e.g. 20 bps but a block align of 3/6 for mono/stereo.
 640                          *
 641                          * Block align for WAVE_FORMAT_PCM or WAVE_FORMAT_EXTENSIBLE is also supposed to be channels*bps/8
 642                          *
 643                          * If the channel mask has more set bits than # of channels, the extra MSBs are ignored.
 644                          * If the channel mask has less set bits than # of channels, the extra channels are unassigned to any speaker.
 645                          *
 646                          * Data is supposed to be unsigned for bps <= 8 else signed.
 647                          */
 648
 649                         /* fmt sub-chunk size */
 650                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 651                                 return EncoderSession_finish_error(&encoder_session);
 652                         data_bytes = xx;
 653                         if(data_bytes < 16) {
 654                                 flac__utils_printf(stderr, 1, "%s: ERROR: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_session.inbasefilename, data_bytes);
 655                                 return EncoderSession_finish_error(&encoder_session);
 656                         }
 657                         /* format code */
 658                         if(!read_little_endian_uint16(infile, &format, false, encoder_session.inbasefilename))
 659                                 return EncoderSession_finish_error(&encoder_session);
 660                         if(format != 1 /*WAVE_FORMAT_PCM*/ && format != 65534 /*WAVE_FORMAT_EXTENSIBLE*/) {
 661                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported format type %u\n", encoder_session.inbasefilename, (unsigned)format);
 662                                 return EncoderSession_finish_error(&encoder_session);
 663                         }
 664                         /* number of channels */
 665                         if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 666                                 return EncoderSession_finish_error(&encoder_session);
 667                         channels = (unsigned)x;
 668                         if(channels == 0 || channels > FLAC__MAX_CHANNELS) {
 669                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported number of channels %u\n", encoder_session.inbasefilename, channels);
 670                                 return EncoderSession_finish_error(&encoder_session);
 671                         }
 672                         else if(options.common.sector_align && channels != 2) {
 673                                 flac__utils_printf(stderr, 1, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_session.inbasefilename, channels);
 674                                 return EncoderSession_finish_error(&encoder_session);
 675                         }
 676                         /* sample rate */
 677                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 678                                 return EncoderSession_finish_error(&encoder_session);
 679                         sample_rate = xx;
 680                         if(!FLAC__format_sample_rate_is_valid(sample_rate)) {
 681                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported sample rate %u\n", encoder_session.inbasefilename, sample_rate);
 682                                 return EncoderSession_finish_error(&encoder_session);
 683                         }
 684                         else if(options.common.sector_align && sample_rate != 44100) {
 685                                 flac__utils_printf(stderr, 1, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_session.inbasefilename, sample_rate);
 686                                 return EncoderSession_finish_error(&encoder_session);
 687                         }
 688                         /* avg bytes per second (ignored) */
 689                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 690                                 return EncoderSession_finish_error(&encoder_session);
 691                         /* block align */
 692                         if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 693                                 return EncoderSession_finish_error(&encoder_session);
 694                         block_align = (unsigned)x;
 695                         /* bits per sample */
 696                         if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 697                                 return EncoderSession_finish_error(&encoder_session);
 698                         bps = (unsigned)x;
 699                         is_unsigned_samples = (bps <= 8);
 700                         if(format == 1) {
 701                                 if(bps != 8 && bps != 16) {
 702                                         if(bps == 24 || bps == 32) {
 703                                                 /* let these slide with a warning since they're unambiguous */
 704                                                 flac__utils_printf(stderr, 1, "%s: WARNING: legacy WAVE file has format type %u but bits-per-sample=%u\n", encoder_session.inbasefilename, (unsigned)format, bps);
 705                                         }
 706                                         else {
 707                                                 /* @@@ we could add an option to specify left- or right-justified blocks so we knew how to set 'shift' */
 708                                                 flac__utils_printf(stderr, 1, "%s: ERROR: legacy WAVE file has format type %u but bits-per-sample=%u\n", encoder_session.inbasefilename, (unsigned)format, bps);
 709                                                 return EncoderSession_finish_error(&encoder_session);
 710                                         }
 711                                 }
 712 #if 0 /* @@@ reinstate once we can get an answer about whether the samples are left- or right-justified */
 713                                 if((bps+7)/8 * channels == block_align) {
 714                                         if(bps % 8) {
 715                                                 /* assume legacy file is byte aligned with some LSBs zero; this is double-checked in format_input() */
 716                                                 flac__utils_printf(stderr, 1, "%s: WARNING: legacy WAVE file (format type %d) has block alignment=%u, bits-per-sample=%u, channels=%u\n", encoder_session.inbasefilename, (unsigned)format, block_align, bps, channels);
 717                                                 shift = 8 - (bps % 8);
 718                                                 bps += shift;
 719                                         }
 720                                         else
 721                                                 shift = 0;
 722                                 }
 723                                 else {
 724                                         flac__utils_printf(stderr, 1, "%s: ERROR: illegal WAVE file (format type %d) has block alignment=%u, bits-per-sample=%u, channels=%u\n", encoder_session.inbasefilename, (unsigned)format, block_align, bps, channels);
 725                                         return EncoderSession_finish_error(&encoder_session);
 726                                 }
 727 #else
 728                                 shift = 0;
 729 #endif
 730                                 if(channels > 2 && !options.common.channel_map_none) {
 731                                         flac__utils_printf(stderr, 1, "%s: ERROR: WAVE has >2 channels but is not WAVE_FORMAT_EXTENSIBLE; cannot assign channels\n", encoder_session.inbasefilename);
 732                                         return EncoderSession_finish_error(&encoder_session);
 733                                 }
 734                                 FLAC__ASSERT(data_bytes >= 16);
 735                                 data_bytes -= 16;
 736                         }
 737                         else {
 738                                 if(data_bytes < 40) {
 739                                         flac__utils_printf(stderr, 1, "%s: ERROR: invalid WAVEFORMATEXTENSIBLE chunk with size %u\n", encoder_session.inbasefilename, data_bytes);
 740                                         return EncoderSession_finish_error(&encoder_session);
 741                                 }
 742                                 /* cbSize */
 743                                 if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 744                                         return EncoderSession_finish_error(&encoder_session);
 745                                 if(x < 22) {
 746                                         flac__utils_printf(stderr, 1, "%s: ERROR: invalid WAVEFORMATEXTENSIBLE chunk with cbSize %u\n", encoder_session.inbasefilename, (unsigned)x);
 747                                         return EncoderSession_finish_error(&encoder_session);
 748                                 }
 749                                 /* valid bps */
 750                                 if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 751                                         return EncoderSession_finish_error(&encoder_session);
 752                                 if((unsigned)x > bps) {
 753                                         flac__utils_printf(stderr, 1, "%s: ERROR: invalid WAVEFORMATEXTENSIBLE chunk with wValidBitsPerSample (%u) > wBitsPerSample (%u)\n", encoder_session.inbasefilename, (unsigned)x, bps);
 754                                         return EncoderSession_finish_error(&encoder_session);
 755                                 }
 756                                 shift = bps - (unsigned)x;
 757                                 /* channel mask */
 758                                 if(!read_little_endian_uint32(infile, &channel_mask, false, encoder_session.inbasefilename))
 759                                         return EncoderSession_finish_error(&encoder_session);
 760                                 /* for mono/stereo and unassigned channels, we fake the mask */
 761                                 if(channel_mask == 0) {
 762                                         if(channels == 1)
 763                                                 channel_mask = 0x0001;
 764                                         else if(channels == 2)
 765                                                 channel_mask = 0x0003;
 766                                 }
 767                                 /* set channel mapping */
 768                                 /* FLAC order follows SMPTE and WAVEFORMATEXTENSIBLE but with fewer channels, which are: */
 769                                 /* front left, front right, center, LFE, back left, back right, surround left, surround right */
 770                                 /* the default mapping is sufficient for 1-6 channels and 7-8 are currently unspecified anyway */
 771 #if 0
 772                                 /* @@@ example for dolby/vorbis order, for reference later in case it becomes important */
 773                                 if(
 774                                         options.common.channel_map_none ||
 775                                         channel_mask == 0x0001 || /* 1 channel: (mono) */
 776                                         channel_mask == 0x0003 || /* 2 channels: front left, front right */
 777                                         channel_mask == 0x0033 || /* 4 channels: front left, front right, back left, back right */
 778                                         channel_mask == 0x0603    /* 4 channels: front left, front right, side left, side right */
 779                                 ) {
 780                                         /* keep default channel order */
 781                                 }
 782                                 else if(
 783                                         channel_mask == 0x0007 || /* 3 channels: front left, front right, front center */
 784                                         channel_mask == 0x0037 || /* 5 channels: front left, front right, front center, back left, back right */
 785                                         channel_mask == 0x0607    /* 5 channels: front left, front right, front center, side left, side right */
 786                                 ) {
 787                                         /* to dolby order: front left, center, front right [, surround left, surround right ] */
 788                                         channel_map[1] = 2;
 789                                         channel_map[2] = 1;
 790                                 }
 791                                 else if(
 792                                         channel_mask == 0x003f || /* 6 channels: front left, front right, front center, LFE, back left, back right */
 793                                         channel_mask == 0x060f    /* 6 channels: front left, front right, front center, LFE, side left, side right */
 794                                 ) {
 795                                         /* to dolby order: front left, center, front right, surround left, surround right, LFE */
 796                                         channel_map[1] = 2;
 797                                         channel_map[2] = 1;
 798                                         channel_map[3] = 5;
 799                                         channel_map[4] = 3;
 800                                         channel_map[5] = 4;
 801                                 }
 802 #else
 803                                 if(
 804                                         options.common.channel_map_none ||
 805                                         channel_mask == 0x0001 || /* 1 channel: (mono) */
 806                                         channel_mask == 0x0003 || /* 2 channels: front left, front right */
 807                                         channel_mask == 0x0007 || /* 3 channels: front left, front right, front center */
 808                                         channel_mask == 0x0033 || /* 4 channels: front left, front right, back left, back right */
 809                                         channel_mask == 0x0603 || /* 4 channels: front left, front right, side left, side right */
 810                                         channel_mask == 0x0037 || /* 5 channels: front left, front right, front center, back left, back right */
 811                                         channel_mask == 0x0607 || /* 5 channels: front left, front right, front center, side left, side right */
 812                                         channel_mask == 0x003f || /* 6 channels: front left, front right, front center, LFE, back left, back right */
 813                                         channel_mask == 0x060f    /* 6 channels: front left, front right, front center, LFE, side left, side right */
 814                                 ) {
 815                                         /* keep default channel order */
 816                                 }
 817 #endif
 818                                 else {
 819                                         flac__utils_printf(stderr, 1, "%s: ERROR: WAVEFORMATEXTENSIBLE chunk with unsupported channel mask=0x%04X\n", encoder_session.inbasefilename, (unsigned)channel_mask);
 820                                         return EncoderSession_finish_error(&encoder_session);
 821                                 }
 822                                 if(!options.common.channel_map_none) {
 823                                         if(count_channel_mask_bits(channel_mask) < channels) {
 824                                                 flac__utils_printf(stderr, 1, "%s: ERROR: WAVEFORMATEXTENSIBLE chunk: channel mask 0x%04X has unassigned channels (#channels=%u)\n", encoder_session.inbasefilename, (unsigned)channel_mask, channels);
 825                                                 return EncoderSession_finish_error(&encoder_session);
 826                                         }
 827 #if 0
 828                                         /* supporting this is too difficult with channel mapping; e.g. what if mask is 0x003f but #channels=4?
 829                                          * there would be holes in the order that would have to be filled in, or the mask would have to be
 830                                          * limited and the logic above rerun to see if it still fits into the FLAC mapping.
 831                                          */
 832                                         else if(count_channel_mask_bits(channel_mask) > channels)
 833                                                 channel_mask = limit_channel_mask(channel_mask, channels);
 834 #else
 835                                         else if(count_channel_mask_bits(channel_mask) > channels) {
 836                                                 flac__utils_printf(stderr, 1, "%s: ERROR: WAVEFORMATEXTENSIBLE chunk: channel mask 0x%04X has extra bits for non-existant channels (#channels=%u)\n", encoder_session.inbasefilename, (unsigned)channel_mask, channels);
 837                                                 return EncoderSession_finish_error(&encoder_session);
 838                                         }
 839 #endif
 840                                 }
 841                                 /* first part of GUID */
 842                                 if(!read_little_endian_uint16(infile, &x, false, encoder_session.inbasefilename))
 843                                         return EncoderSession_finish_error(&encoder_session);
 844                                 if(x != 1) {
 845                                         flac__utils_printf(stderr, 1, "%s: ERROR: unsupported WAVEFORMATEXTENSIBLE chunk with non-PCM format %u\n", encoder_session.inbasefilename, (unsigned)x);
 846                                         return EncoderSession_finish_error(&encoder_session);
 847                                 }
 848                                 data_bytes -= 26;
 849                         }
 850
 851                         if(bps-shift < 4 || bps-shift > 24) {
 852                                 flac__utils_printf(stderr, 1, "%s: ERROR: unsupported bits-per-sample %u\n", encoder_session.inbasefilename, bps-shift);
 853                                 return EncoderSession_finish_error(&encoder_session);
 854                         }
 855                         else if(options.common.sector_align && bps-shift != 16) {
 856                                 flac__utils_printf(stderr, 1, "%s: ERROR: file has %u bits-per-sample, must be 16 for --sector-align\n", encoder_session.inbasefilename, bps-shift);
 857                                 return EncoderSession_finish_error(&encoder_session);
 858                         }
 859
 860                         /* skip any extra data in the fmt sub-chunk */
 861                         if(!fskip_ahead(infile, data_bytes)) {
 862                                 flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping extra 'fmt' data\n", encoder_session.inbasefilename);
 863                                 return EncoderSession_finish_error(&encoder_session);
 864                         }
 865
 866                         /*
 867                          * now that we know the sample rate, canonicalize the
 868                          * --skip string to a number of samples:
 869                          */
 870                         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, sample_rate);
 871                         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
 872                         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
 873                         FLAC__ASSERT(!options.common.sector_align || encoder_session.skip == 0);
 874
 875                         got_fmt_chunk = true;
 876                 }
 877                 else if(xx == 0x61746164 && !got_data_chunk && got_fmt_chunk) { /* "data" */
 878                         FLAC__uint64 total_samples_in_input, trim = 0;
 879                         FLAC__bool pad = false;
 880                         unsigned data_bytes;
 881
 882                         /* data size */
 883                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
 884                                 return EncoderSession_finish_error(&encoder_session);
 885                         data_bytes = xx;
 886                         if(0 == data_bytes) {
 887                                 flac__utils_printf(stderr, 1, "%s: ERROR: 'data' subchunk has size of 0\n", encoder_session.inbasefilename);
 888                                 return EncoderSession_finish_error(&encoder_session);
 889                         }
 890                         pad = (data_bytes & 1U) ? true : false;
 891
 892                         bytes_per_wide_sample = channels * (bps >> 3);
 893
 894                         /* *options.common.align_reservoir_samples will be 0 unless --sector-align is used */
 895                         FLAC__ASSERT(options.common.sector_align || *options.common.align_reservoir_samples == 0);
 896                         total_samples_in_input = data_bytes / bytes_per_wide_sample + *options.common.align_reservoir_samples;
 897
 898                         /*
 899                          * now that we know the input size, canonicalize the
 900                          * --until string to an absolute sample number:
 901                          */
 902                         if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, sample_rate, encoder_session.skip, total_samples_in_input))
 903                                 return EncoderSession_finish_error(&encoder_session);
 904                         encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
 905                         FLAC__ASSERT(!options.common.sector_align || encoder_session.until == 0);
 906
 907                         if(encoder_session.skip > 0) {
 908                                 if(!fskip_ahead(infile, encoder_session.skip * bytes_per_wide_sample)) {
 909                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 910                                         return EncoderSession_finish_error(&encoder_session);
 911                                 }
 912                         }
 913
 914                         data_bytes -= (unsigned)encoder_session.skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
 915                         encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
 916                         if(encoder_session.until > 0) {
 917                                 trim = total_samples_in_input - encoder_session.until;
 918                                 FLAC__ASSERT(total_samples_in_input > 0);
 919                                 FLAC__ASSERT(!options.common.sector_align);
 920                                 data_bytes -= (unsigned int)trim * bytes_per_wide_sample;
 921                                 encoder_session.total_samples_to_encode -= trim;
 922                         }
 923                         if(options.common.sector_align) {
 924                                 align_remainder = (unsigned)(encoder_session.total_samples_to_encode % 588);
 925                                 if(options.common.is_last_file)
 926                                         encoder_session.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 927                                 else
 928                                         encoder_session.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 929                         }
 930
 931                         /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 932                         encoder_session.unencoded_size = encoder_session.total_samples_to_encode * bytes_per_wide_sample + 44;
 933
 934                         if(!EncoderSession_init_encoder(&encoder_session, options.common, channel_mask, channels, bps-shift, sample_rate, /*flac_decoder_data=*/0))
 935                                 return EncoderSession_finish_error(&encoder_session);
 936
 937                         /*
 938                          * first do any samples in the reservoir
 939                          */
 940                         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
 941                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 942                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 943                                         return EncoderSession_finish_error(&encoder_session);
 944                                 }
 945                         }
 946
 947                         /*
 948                          * decrement the data_bytes counter if we need to align the file
 949                          */
 950                         if(options.common.sector_align) {
 951                                 if(options.common.is_last_file) {
 952                                         *options.common.align_reservoir_samples = 0;
 953                                 }
 954                                 else {
 955                                         *options.common.align_reservoir_samples = align_remainder;
 956                                         data_bytes -= (*options.common.align_reservoir_samples) * bytes_per_wide_sample;
 957                                 }
 958                         }
 959
 960                         /*
 961                          * now do from the file
 962                          */
 963                         while(data_bytes > 0) {
 964                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
 965                                 if(bytes_read == 0) {
 966                                         if(ferror(infile)) {
 967                                                 flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
 968                                                 return EncoderSession_finish_error(&encoder_session);
 969                                         }
 970                                         else if(feof(infile)) {
 971                                                 flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned)encoder_session.total_samples_to_encode, (unsigned)encoder_session.samples_written);
 972                                                 data_bytes = 0;
 973                                         }
 974                                 }
 975                                 else {
 976                                         if(bytes_read % bytes_per_wide_sample != 0) {
 977                                                 flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
 978                                                 return EncoderSession_finish_error(&encoder_session);
 979                                         }
 980                                         else {
 981                                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 982                                                 if(!format_input(input_, wide_samples, /*is_big_endian=*/false, is_unsigned_samples, channels, bps, shift, channel_map))
 983                                                         return EncoderSession_finish_error(&encoder_session);
 984
 985                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
 986                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 987                                                         return EncoderSession_finish_error(&encoder_session);
 988                                                 }
 989                                                 data_bytes -= bytes_read;
 990                                         }
 991                                 }
 992                         }
 993
 994                         if(trim > 0) {
 995                                 FLAC__ASSERT(!options.common.sector_align);
 996                                 if(!fskip_ahead(infile, trim * bytes_per_wide_sample)) {
 997                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 998                                         return EncoderSession_finish_error(&encoder_session);
 999                                 }
1000                         }
1001
1002                         /*
1003                          * now read unaligned samples into reservoir or pad with zeroes if necessary
1004                          */
1005                         if(options.common.sector_align) {
1006                                 if(options.common.is_last_file) {
1007                                         unsigned wide_samples = 588 - align_remainder;
1008                                         if(wide_samples < 588) {
1009                                                 unsigned channel;
1010
1011                                                 info_align_zero = wide_samples;
1012                                                 for(channel = 0; channel < channels; channel++)
1013                                                         memset(input_[channel], 0, sizeof(input_[0][0]) * wide_samples);
1014
1015                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1016                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1017                                                         return EncoderSession_finish_error(&encoder_session);
1018                                                 }
1019                                         }
1020                                 }
1021                                 else {
1022                                         if(*options.common.align_reservoir_samples > 0) {
1023                                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
1024                                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
1025                                                 if(bytes_read == 0 && ferror(infile)) {
1026                                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1027                                                         return EncoderSession_finish_error(&encoder_session);
1028                                                 }
1029                                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
1030                                                         flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned)bytes_read, (unsigned)encoder_session.total_samples_to_encode, (unsigned)encoder_session.samples_written);
1031                                                 }
1032                                                 else {
1033                                                         info_align_carry = *options.common.align_reservoir_samples;
1034                                                         if(!format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, /*is_big_endian=*/false, is_unsigned_samples, channels, bps, shift, channel_map))
1035                                                                 return EncoderSession_finish_error(&encoder_session);
1036                                                 }
1037                                         }
1038                                 }
1039                         }
1040
1041                         if(pad == true) {
1042                                 unsigned char tmp;
1043
1044                                 if(fread(&tmp, 1U, 1U, infile) < 1U) {
1045                                         flac__utils_printf(stderr, 1, "%s: ERROR during read of data pad byte\n", encoder_session.inbasefilename);
1046                                         return EncoderSession_finish_error(&encoder_session);
1047                                 }
1048                         }
1049
1050                         got_data_chunk = true;
1051                 }
1052                 else {
1053                         if(xx == 0x20746d66 && got_fmt_chunk) { /* "fmt " */
1054                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_session.inbasefilename);
1055                         }
1056                         else if(xx == 0x61746164) { /* "data" */
1057                                 if(got_data_chunk) {
1058                                         flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_session.inbasefilename);
1059                                 }
1060                                 else if(!got_fmt_chunk) {
1061                                         flac__utils_printf(stderr, 1, "%s: ERROR: got 'data' sub-chunk before 'fmt' sub-chunk\n", encoder_session.inbasefilename);
1062                                         return EncoderSession_finish_error(&encoder_session);
1063                                 }
1064                                 else {
1065                                         FLAC__ASSERT(0);
1066                                 }
1067                         }
1068                         else {
1069                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping unknown sub-chunk '%c%c%c%c'\n", encoder_session.inbasefilename, (char)(xx&255), (char)((xx>>8)&255), (char)((xx>>16)&255), (char)(xx>>24));
1070                         }
1071                         /* sub-chunk size */
1072                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
1073                                 return EncoderSession_finish_error(&encoder_session);
1074                         else {
1075                                 unsigned long skip = xx+(xx & 1U);
1076
1077                                 FLAC__ASSERT(skip<=LONG_MAX);
1078                                 if(!fskip_ahead(infile, skip)) {
1079                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_session.inbasefilename);
1080                                         return EncoderSession_finish_error(&encoder_session);
1081                                 }
1082                         }
1083                 }
1084         }
1085
1086         return EncoderSession_finish_ok(&encoder_session, info_align_carry, info_align_zero);
1087 }
1088
1089 int flac__encode_raw(FILE *infile, off_t infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, raw_encode_options_t options)
1090 {
1091         EncoderSession encoder_session;
1092         size_t bytes_read;
1093         const size_t bytes_per_wide_sample = options.channels * (options.bps >> 3);
1094         unsigned align_remainder = 0;
1095         int info_align_carry = -1, info_align_zero = -1;
1096         FLAC__uint64 total_samples_in_input = 0;
1097
1098         FLAC__ASSERT(!options.common.sector_align || options.channels == 2);
1099         FLAC__ASSERT(!options.common.sector_align || options.bps == 16);
1100         FLAC__ASSERT(!options.common.sector_align || options.sample_rate == 44100);
1101         FLAC__ASSERT(!options.common.sector_align || infilesize >= 0);
1102         FLAC__ASSERT(!options.common.replay_gain || options.channels <= 2);
1103         FLAC__ASSERT(!options.common.replay_gain || grabbag__replaygain_is_valid_sample_frequency(options.sample_rate));
1104
1105         if(!
1106                 EncoderSession_construct(
1107                         &encoder_session,
1108 #ifdef FLAC__HAS_OGG
1109                         options.common.use_ogg,
1110 #else
1111                         /*use_ogg=*/false,
1112 #endif
1113                         options.common.verify,
1114                         infile,
1115                         infilename,
1116                         outfilename
1117                 )
1118         )
1119                 return 1;
1120
1121         /*
1122          * now that we know the sample rate, canonicalize the
1123          * --skip string to a number of samples:
1124          */
1125         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, options.sample_rate);
1126         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
1127         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
1128         FLAC__ASSERT(!options.common.sector_align || encoder_session.skip == 0);
1129
1130         if(infilesize < 0)
1131                 total_samples_in_input = 0;
1132         else {
1133                 /* *options.common.align_reservoir_samples will be 0 unless --sector-align is used */
1134                 FLAC__ASSERT(options.common.sector_align || *options.common.align_reservoir_samples == 0);
1135                 total_samples_in_input = (FLAC__uint64)infilesize / bytes_per_wide_sample + *options.common.align_reservoir_samples;
1136         }
1137
1138         /*
1139          * now that we know the input size, canonicalize the
1140          * --until strings to a number of samples:
1141          */
1142         if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, options.sample_rate, encoder_session.skip, total_samples_in_input))
1143                 return EncoderSession_finish_error(&encoder_session);
1144         encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
1145         FLAC__ASSERT(!options.common.sector_align || encoder_session.until == 0);
1146
1147         infilesize -= (off_t)encoder_session.skip * bytes_per_wide_sample;
1148         encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
1149         if(encoder_session.until > 0) {
1150                 const FLAC__uint64 trim = total_samples_in_input - encoder_session.until;
1151                 FLAC__ASSERT(total_samples_in_input > 0);
1152                 FLAC__ASSERT(!options.common.sector_align);
1153                 infilesize -= (off_t)trim * bytes_per_wide_sample;
1154                 encoder_session.total_samples_to_encode -= trim;
1155         }
1156         if(infilesize >= 0 && options.common.sector_align) {
1157                 FLAC__ASSERT(encoder_session.skip == 0);
1158                 align_remainder = (unsigned)(encoder_session.total_samples_to_encode % 588);
1159                 if(options.common.is_last_file)
1160                         encoder_session.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
1161                 else
1162                         encoder_session.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
1163         }
1164         encoder_session.unencoded_size = encoder_session.total_samples_to_encode * bytes_per_wide_sample;
1165
1166         if(encoder_session.total_samples_to_encode <= 0)
1167                 flac__utils_printf(stderr, 2, "(No runtime statistics possible; please wait for encoding to finish...)\n");
1168
1169         if(encoder_session.skip > 0) {
1170                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)encoder_session.skip;
1171                 if(skip_bytes > lookahead_length) {
1172                         skip_bytes -= lookahead_length;
1173                         lookahead_length = 0;
1174                         if(!fskip_ahead(infile, skip_bytes)) {
1175                                 flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
1176                                 return EncoderSession_finish_error(&encoder_session);
1177                         }
1178                 }
1179                 else {
1180                         lookahead += skip_bytes;
1181                         lookahead_length -= skip_bytes;
1182                 }
1183         }
1184
1185         if(!EncoderSession_init_encoder(&encoder_session, options.common, /*channel_mask=*/0, options.channels, options.bps, options.sample_rate, /*flac_decoder_data=*/0))
1186                 return EncoderSession_finish_error(&encoder_session);
1187
1188         /*
1189          * first do any samples in the reservoir
1190          */
1191         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
1192                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
1193                         print_error_with_state(&encoder_session, "ERROR during encoding");
1194                         return EncoderSession_finish_error(&encoder_session);
1195                 }
1196         }
1197
1198         /*
1199          * decrement infilesize if we need to align the file
1200          */
1201         if(options.common.sector_align) {
1202                 FLAC__ASSERT(infilesize >= 0);
1203                 if(options.common.is_last_file) {
1204                         *options.common.align_reservoir_samples = 0;
1205                 }
1206                 else {
1207                         *options.common.align_reservoir_samples = align_remainder;
1208                         infilesize -= (off_t)((*options.common.align_reservoir_samples) * bytes_per_wide_sample);
1209                         FLAC__ASSERT(infilesize >= 0);
1210                 }
1211         }
1212
1213         /*
1214          * now do from the file
1215          */
1216         if(infilesize < 0) {
1217                 while(!feof(infile)) {
1218                         if(lookahead_length > 0) {
1219                                 FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
1220                                 memcpy(ucbuffer_, lookahead, lookahead_length);
1221                                 bytes_read = fread(ucbuffer_+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
1222                                 if(ferror(infile)) {
1223                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1224                                         return EncoderSession_finish_error(&encoder_session);
1225                                 }
1226                                 lookahead_length = 0;
1227                         }
1228                         else
1229                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
1230
1231                         if(bytes_read == 0) {
1232                                 if(ferror(infile)) {
1233                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1234                                         return EncoderSession_finish_error(&encoder_session);
1235                                 }
1236                         }
1237                         else if(bytes_read % bytes_per_wide_sample != 0) {
1238                                 flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
1239                                 return EncoderSession_finish_error(&encoder_session);
1240                         }
1241                         else {
1242                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
1243                                 if(!format_input(input_, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, /*shift=*/0, /*channel_map=*/0))
1244                                         return EncoderSession_finish_error(&encoder_session);
1245
1246                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1247                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1248                                         return EncoderSession_finish_error(&encoder_session);
1249                                 }
1250                         }
1251                 }
1252         }
1253         else {
1254                 const FLAC__uint64 max_input_bytes = infilesize;
1255                 FLAC__uint64 total_input_bytes_read = 0;
1256                 while(total_input_bytes_read < max_input_bytes) {
1257                         {
1258                                 size_t wanted = (CHUNK_OF_SAMPLES * bytes_per_wide_sample);
1259                                 wanted = (size_t) min((FLAC__uint64)wanted, max_input_bytes - total_input_bytes_read);
1260
1261                                 if(lookahead_length > 0) {
1262                                         FLAC__ASSERT(lookahead_length <= wanted);
1263                                         memcpy(ucbuffer_, lookahead, lookahead_length);
1264                                         wanted -= lookahead_length;
1265                                         bytes_read = lookahead_length;
1266                                         if(wanted > 0) {
1267                                                 bytes_read += fread(ucbuffer_+lookahead_length, sizeof(unsigned char), wanted, infile);
1268                                                 if(ferror(infile)) {
1269                                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1270                                                         return EncoderSession_finish_error(&encoder_session);
1271                                                 }
1272                                         }
1273                                         lookahead_length = 0;
1274                                 }
1275                                 else
1276                                         bytes_read = fread(ucbuffer_, sizeof(unsigned char), wanted, infile);
1277                         }
1278
1279                         if(bytes_read == 0) {
1280                                 if(ferror(infile)) {
1281                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1282                                         return EncoderSession_finish_error(&encoder_session);
1283                                 }
1284                                 else if(feof(infile)) {
1285                                         flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned)encoder_session.total_samples_to_encode, (unsigned)encoder_session.samples_written);
1286                                         total_input_bytes_read = max_input_bytes;
1287                                 }
1288                         }
1289                         else {
1290                                 if(bytes_read % bytes_per_wide_sample != 0) {
1291                                         flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
1292                                         return EncoderSession_finish_error(&encoder_session);
1293                                 }
1294                                 else {
1295                                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
1296                                         if(!format_input(input_, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, /*shift=*/0, /*channel_map=*/0))
1297                                                 return EncoderSession_finish_error(&encoder_session);
1298
1299                                         if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1300                                                 print_error_with_state(&encoder_session, "ERROR during encoding");
1301                                                 return EncoderSession_finish_error(&encoder_session);
1302                                         }
1303                                         total_input_bytes_read += bytes_read;
1304                                 }
1305                         }
1306                 }
1307         }
1308
1309         /*
1310          * now read unaligned samples into reservoir or pad with zeroes if necessary
1311          */
1312         if(options.common.sector_align) {
1313                 if(options.common.is_last_file) {
1314                         unsigned wide_samples = 588 - align_remainder;
1315                         if(wide_samples < 588) {
1316                                 unsigned channel;
1317
1318                                 info_align_zero = wide_samples;
1319                                 for(channel = 0; channel < options.channels; channel++)
1320                                         memset(input_[channel], 0, sizeof(input_[0][0]) * wide_samples);
1321
1322                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1323                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1324                                         return EncoderSession_finish_error(&encoder_session);
1325                                 }
1326                         }
1327                 }
1328                 else {
1329                         if(*options.common.align_reservoir_samples > 0) {
1330                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
1331                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
1332                                 if(bytes_read == 0 && ferror(infile)) {
1333                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1334                                         return EncoderSession_finish_error(&encoder_session);
1335                                 }
1336                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
1337                                         flac__utils_printf(stderr, 1, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_session.inbasefilename, (unsigned)bytes_read, (unsigned)encoder_session.total_samples_to_encode, (unsigned)encoder_session.samples_written);
1338                                 }
1339                                 else {
1340                                         info_align_carry = *options.common.align_reservoir_samples;
1341                                         if(!format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, /*shift=*/0, /*channel_map=*/0))
1342                                                 return EncoderSession_finish_error(&encoder_session);
1343                                 }
1344                         }
1345                 }
1346         }
1347
1348         return EncoderSession_finish_ok(&encoder_session, info_align_carry, info_align_zero);
1349 }
1350
1351 int flac__encode_flac(FILE *infile, off_t infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, flac_encode_options_t options, FLAC__bool input_is_ogg)
1352 {
1353         EncoderSession encoder_session;
1354         FLAC__StreamDecoder *decoder = 0;
1355         FLACDecoderData decoder_data;
1356         size_t i;
1357         int retval;
1358
1359         if(!
1360                 EncoderSession_construct(
1361                         &encoder_session,
1362 #ifdef FLAC__HAS_OGG
1363                         options.common.use_ogg,
1364 #else
1365                         /*use_ogg=*/false,
1366 #endif
1367                         options.common.verify,
1368                         infile,
1369                         infilename,
1370                         outfilename
1371                 )
1372         )
1373                 return 1;
1374
1375         decoder_data.encoder_session = &encoder_session;
1376         decoder_data.filesize = (infilesize == (off_t)(-1)? 0 : infilesize);
1377         decoder_data.lookahead = lookahead;
1378         decoder_data.lookahead_length = lookahead_length;
1379         decoder_data.num_metadata_blocks = 0;
1380         decoder_data.samples_left_to_process = 0;
1381         decoder_data.fatal_error = false;
1382
1383         /*
1384          * set up FLAC decoder for the input
1385          */
1386         if (0 == (decoder = FLAC__stream_decoder_new())) {
1387                 flac__utils_printf(stderr, 1, "%s: ERROR: creating decoder for FLAC input\n", encoder_session.inbasefilename);
1388                 return EncoderSession_finish_error(&encoder_session);
1389         }
1390         if (!(
1391                 FLAC__stream_decoder_set_md5_checking(decoder, false) &&
1392                 FLAC__stream_decoder_set_metadata_respond_all(decoder)
1393         )) {
1394                 flac__utils_printf(stderr, 1, "%s: ERROR: setting up decoder for FLAC input\n", encoder_session.inbasefilename);
1395                 goto fubar1; /*@@@ yuck */
1396         }
1397
1398         if (input_is_ogg) {
1399                 if (FLAC__stream_decoder_init_ogg_stream(decoder, flac_decoder_read_callback, flac_decoder_seek_callback, flac_decoder_tell_callback, flac_decoder_length_callback, flac_decoder_eof_callback, flac_decoder_write_callback, flac_decoder_metadata_callback, flac_decoder_error_callback, /*client_data=*/&decoder_data) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
1400                         flac__utils_printf(stderr, 1, "%s: ERROR: initializing decoder for Ogg FLAC input, state = %s\n", encoder_session.inbasefilename, FLAC__stream_decoder_get_resolved_state_string(decoder));
1401                         goto fubar1; /*@@@ yuck */
1402                 }
1403         }
1404         else if (FLAC__stream_decoder_init_stream(decoder, flac_decoder_read_callback, flac_decoder_seek_callback, flac_decoder_tell_callback, flac_decoder_length_callback, flac_decoder_eof_callback, flac_decoder_write_callback, flac_decoder_metadata_callback, flac_decoder_error_callback, /*client_data=*/&decoder_data) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
1405                 flac__utils_printf(stderr, 1, "%s: ERROR: initializing decoder for FLAC input, state = %s\n", encoder_session.inbasefilename, FLAC__stream_decoder_get_resolved_state_string(decoder));
1406                 goto fubar1; /*@@@ yuck */
1407         }
1408
1409         if (!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || decoder_data.fatal_error) {
1410                 if (decoder_data.fatal_error)
1411                         flac__utils_printf(stderr, 1, "%s: ERROR: out of memory or too many metadata blocks while reading metadata in FLAC input\n", encoder_session.inbasefilename);
1412                 else
1413                         flac__utils_printf(stderr, 1, "%s: ERROR: reading metadata in FLAC input, state = %s\n", encoder_session.inbasefilename, FLAC__stream_decoder_get_resolved_state_string(decoder));
1414                 goto fubar1; /*@@@ yuck */
1415         }
1416
1417         if (decoder_data.num_metadata_blocks == 0) {
1418                 flac__utils_printf(stderr, 1, "%s: ERROR: reading metadata in FLAC input, got no metadata blocks\n", encoder_session.inbasefilename);
1419                 goto fubar2; /*@@@ yuck */
1420         }
1421         else if (decoder_data.metadata_blocks[0]->type != FLAC__METADATA_TYPE_STREAMINFO) {
1422                 flac__utils_printf(stderr, 1, "%s: ERROR: reading metadata in FLAC input, first metadata block is not STREAMINFO\n", encoder_session.inbasefilename);
1423                 goto fubar2; /*@@@ yuck */
1424         }
1425         else if (decoder_data.metadata_blocks[0]->data.stream_info.total_samples == 0) {
1426                 flac__utils_printf(stderr, 1, "%s: ERROR: FLAC input has STREAMINFO with unknown total samples which is not supported\n", encoder_session.inbasefilename);
1427                 goto fubar2; /*@@@ yuck */
1428         }
1429
1430         /*
1431          * now that we have the STREAMINFO and know the sample rate,
1432          * canonicalize the --skip string to a number of samples:
1433          */
1434         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, decoder_data.metadata_blocks[0]->data.stream_info.sample_rate);
1435         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
1436         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
1437         FLAC__ASSERT(!options.common.sector_align); /* --sector-align with FLAC input is not supported */
1438
1439         {
1440                 FLAC__uint64 total_samples_in_input, trim = 0;
1441
1442                 total_samples_in_input = decoder_data.metadata_blocks[0]->data.stream_info.total_samples;
1443
1444                 /*
1445                  * now that we know the input size, canonicalize the
1446                  * --until string to an absolute sample number:
1447                  */
1448                 if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, decoder_data.metadata_blocks[0]->data.stream_info.sample_rate, encoder_session.skip, total_samples_in_input))
1449                         goto fubar2; /*@@@ yuck */
1450                 encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
1451
1452                 encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
1453                 if(encoder_session.until > 0) {
1454                         trim = total_samples_in_input - encoder_session.until;
1455                         FLAC__ASSERT(total_samples_in_input > 0);
1456                         encoder_session.total_samples_to_encode -= trim;
1457                 }
1458
1459                 encoder_session.unencoded_size = decoder_data.filesize;
1460
1461                 /* (channel mask will get copied over from the source VORBIS_COMMENT if it exists) */
1462                 if(!EncoderSession_init_encoder(&encoder_session, options.common, /*channel_mask=*/0, decoder_data.metadata_blocks[0]->data.stream_info.channels, decoder_data.metadata_blocks[0]->data.stream_info.bits_per_sample, decoder_data.metadata_blocks[0]->data.stream_info.sample_rate, &decoder_data))
1463                         return EncoderSession_finish_error(&encoder_session);
1464
1465                 /*
1466                  * have to wait until the FLAC encoder is set up for writing
1467                  * before any seeking in the input FLAC file, because the seek
1468                  * itself will usually call the decoder's write callback, and
1469                  * our decoder's write callback passes samples to our FLAC
1470                  * encoder
1471                  */
1472                 decoder_data.samples_left_to_process = encoder_session.total_samples_to_encode;
1473                 if(encoder_session.skip > 0) {
1474                         if(!FLAC__stream_decoder_seek_absolute(decoder, encoder_session.skip)) {
1475                                 flac__utils_printf(stderr, 1, "%s: ERROR while skipping samples, FLAC decoder state = %s\n", encoder_session.inbasefilename, FLAC__stream_decoder_get_resolved_state_string(decoder));
1476                                 goto fubar2; /*@@@ yuck */
1477                         }
1478                 }
1479
1480                 /*
1481                  * now do samples from the file
1482                  */
1483                 while(!decoder_data.fatal_error && decoder_data.samples_left_to_process > 0) {
1484                         if(!FLAC__stream_decoder_process_single(decoder)) {
1485                                 flac__utils_printf(stderr, 1, "%s: ERROR: while decoding FLAC input, state = %s\n", encoder_session.inbasefilename, FLAC__stream_decoder_get_resolved_state_string(decoder));
1486                                 goto fubar2; /*@@@ yuck */
1487                         }
1488                 }
1489         }
1490
1491         FLAC__stream_decoder_delete(decoder);
1492         retval = EncoderSession_finish_ok(&encoder_session, -1, -1);
1493         /* have to wail until encoder is completely finished before deleting because of the final step of writing the seekpoint offsets */
1494         for(i = 0; i < decoder_data.num_metadata_blocks; i++)
1495                 free(decoder_data.metadata_blocks[i]);
1496         return retval;
1497
1498 fubar2:
1499         for(i = 0; i < decoder_data.num_metadata_blocks; i++)
1500                 free(decoder_data.metadata_blocks[i]);
1501 fubar1:
1502         FLAC__stream_decoder_delete(decoder);
1503         return EncoderSession_finish_error(&encoder_session);
1504 }
1505
1506 FLAC__bool EncoderSession_construct(EncoderSession *e, FLAC__bool use_ogg, FLAC__bool verify, FILE *infile, const char *infilename, const char *outfilename)
1507 {
1508         unsigned i;
1509         FLAC__uint32 test = 1;
1510
1511         /*
1512          * initialize globals
1513          */
1514
1515         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
1516
1517         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
1518                 input_[i] = &(in_[i][0]);
1519
1520
1521         /*
1522          * initialize instance
1523          */
1524
1525 #ifdef FLAC__HAS_OGG
1526         e->use_ogg = use_ogg;
1527 #else
1528         (void)use_ogg;
1529 #endif
1530         e->verify = verify;
1531
1532         e->is_stdout = (0 == strcmp(outfilename, "-"));
1533         e->outputfile_opened = false;
1534
1535         e->inbasefilename = grabbag__file_get_basename(infilename);
1536         e->outfilename = outfilename;
1537
1538         e->skip = 0; /* filled in later after the sample_rate is known */
1539         e->unencoded_size = 0;
1540         e->total_samples_to_encode = 0;
1541         e->bytes_written = 0;
1542         e->samples_written = 0;
1543         e->stats_mask = 0;
1544
1545         e->encoder = 0;
1546
1547         e->fin = infile;
1548         e->seek_table_template = 0;
1549
1550         if(0 == (e->seek_table_template = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE))) {
1551                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for seek table\n", e->inbasefilename);
1552                 return false;
1553         }
1554
1555         e->encoder = FLAC__stream_encoder_new();
1556         if(0 == e->encoder) {
1557                 flac__utils_printf(stderr, 1, "%s: ERROR creating the encoder instance\n", e->inbasefilename);
1558                 EncoderSession_destroy(e);
1559                 return false;
1560         }
1561
1562         return true;
1563 }
1564
1565 void EncoderSession_destroy(EncoderSession *e)
1566 {
1567         if(e->fin != stdin)
1568                 fclose(e->fin);
1569
1570         if(0 != e->encoder) {
1571                 FLAC__stream_encoder_delete(e->encoder);
1572                 e->encoder = 0;
1573         }
1574
1575         if(0 != e->seek_table_template) {
1576                 FLAC__metadata_object_delete(e->seek_table_template);
1577                 e->seek_table_template = 0;
1578         }
1579 }
1580
1581 int EncoderSession_finish_ok(EncoderSession *e, int info_align_carry, int info_align_zero)
1582 {
1583         FLAC__StreamEncoderState fse_state = FLAC__STREAM_ENCODER_OK;
1584         int ret = 0;
1585         FLAC__bool verify_error = false;
1586
1587         if(e->encoder) {
1588                 fse_state = FLAC__stream_encoder_get_state(e->encoder);
1589                 ret = FLAC__stream_encoder_finish(e->encoder)? 0 : 1;
1590                 verify_error =
1591                         fse_state == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA ||
1592                         FLAC__stream_encoder_get_state(e->encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA
1593                 ;
1594         }
1595         /* all errors except verify errors should interrupt the stats */
1596         if(ret && !verify_error)
1597                 print_error_with_state(e, "ERROR during encoding");
1598         else if(e->total_samples_to_encode > 0) {
1599                 print_stats(e);
1600                 flac__utils_printf(stderr, 2, "\n");
1601         }
1602
1603         if(verify_error) {
1604                 print_verify_error(e);
1605                 ret = 1;
1606         }
1607         else {
1608                 if(info_align_carry >= 0) {
1609                         flac__utils_printf(stderr, 1, "%s: INFO: sector alignment causing %d samples to be carried over\n", e->inbasefilename, info_align_carry);
1610                 }
1611                 if(info_align_zero >= 0) {
1612                         flac__utils_printf(stderr, 1, "%s: INFO: sector alignment causing %d zero samples to be appended\n", e->inbasefilename, info_align_zero);
1613                 }
1614         }
1615
1616         EncoderSession_destroy(e);
1617
1618         return ret;
1619 }
1620
1621 int EncoderSession_finish_error(EncoderSession *e)
1622 {
1623         FLAC__ASSERT(e->encoder);
1624
1625         if(e->total_samples_to_encode > 0)
1626                 flac__utils_printf(stderr, 2, "\n");
1627
1628         if(FLAC__stream_encoder_get_state(e->encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
1629                 print_verify_error(e);
1630         else if(e->outputfile_opened)
1631                 /* only want to delete the file if we opened it; otherwise it could be an existing file and our overwrite failed */
1632                 unlink(e->outfilename);
1633
1634         EncoderSession_destroy(e);
1635
1636         return 1;
1637 }
1638
1639 FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t options, FLAC__uint32 channel_mask, unsigned channels, unsigned bps, unsigned sample_rate, FLACDecoderData *flac_decoder_data)
1640 {
1641         unsigned num_metadata, i;
1642         FLAC__StreamMetadata padding, *cuesheet = 0;
1643         FLAC__StreamMetadata *static_metadata[4+64]; /* MAGIC +64 is for pictures metadata in options.pictures */
1644         FLAC__StreamMetadata **metadata = static_metadata;
1645         FLAC__StreamEncoderInitStatus init_status;
1646         const FLAC__bool is_cdda = (channels == 1 || channels == 2) && (bps == 16) && (sample_rate == 44100);
1647         char apodizations[2000];
1648
1649         FLAC__ASSERT(sizeof(options.pictures)/sizeof(options.pictures[0]) <= 64);
1650
1651         e->replay_gain = options.replay_gain;
1652         e->channels = channels;
1653         e->bits_per_sample = bps;
1654         e->sample_rate = sample_rate;
1655
1656         apodizations[0] = '\0';
1657
1658         if(e->replay_gain) {
1659                 if(channels != 1 && channels != 2) {
1660                         flac__utils_printf(stderr, 1, "%s: ERROR, number of channels (%u) must be 1 or 2 for --replay-gain\n", e->inbasefilename, channels);
1661                         return false;
1662                 }
1663                 if(!grabbag__replaygain_is_valid_sample_frequency(sample_rate)) {
1664                         flac__utils_printf(stderr, 1, "%s: ERROR, invalid sample rate (%u) for --replay-gain\n", e->inbasefilename, sample_rate);
1665                         return false;
1666                 }
1667                 if(options.is_first_file) {
1668                         if(!grabbag__replaygain_init(sample_rate)) {
1669                                 flac__utils_printf(stderr, 1, "%s: ERROR initializing ReplayGain stage\n", e->inbasefilename);
1670                                 return false;
1671                         }
1672                 }
1673         }
1674
1675         if(!parse_cuesheet(&cuesheet, options.cuesheet_filename, e->inbasefilename, is_cdda, e->total_samples_to_encode))
1676                 return false;
1677
1678         if(!convert_to_seek_table_template(options.requested_seek_points, options.num_requested_seek_points, options.cued_seekpoints? cuesheet : 0, e)) {
1679                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for seek table\n", e->inbasefilename);
1680                 if(0 != cuesheet)
1681                         FLAC__metadata_object_delete(cuesheet);
1682                 return false;
1683         }
1684
1685         if(flac_decoder_data) {
1686                 /*
1687                  * we're encoding from FLAC so we will use the FLAC file's
1688                  * metadata as the basic for the encoded file
1689                  */
1690                 {
1691                         /*
1692                          * first handle padding: if --no-padding was specified,
1693                          * then delete all padding; else if -P was specified,
1694                          * use that instead of existing padding (if any); else
1695                          * if existing file has padding, move all existing
1696                          * padding blocks to one padding block at the end; else
1697                          * use default padding.
1698                          */
1699                         int p = -1;
1700                         size_t i, j;
1701                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1702                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_PADDING) {
1703                                         if(p < 0)
1704                                                 p = 0;
1705                                         p += flac_decoder_data->metadata_blocks[i]->length;
1706                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1707                                         flac_decoder_data->metadata_blocks[i] = 0;
1708                                 }
1709                                 else
1710                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1711                         }
1712                         flac_decoder_data->num_metadata_blocks = j;
1713                         if(options.padding > 0)
1714                                 p = options.padding;
1715                         if(p < 0)
1716                                 p = e->total_samples_to_encode / e->sample_rate < 20*60? FLAC_ENCODE__DEFAULT_PADDING : FLAC_ENCODE__DEFAULT_PADDING*8;
1717                         if(options.padding != 0) {
1718                                 if(p > 0 && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1719                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
1720                                         if(0 == flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]) {
1721                                                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for PADDING block\n", e->inbasefilename);
1722                                                 if(0 != cuesheet)
1723                                                         FLAC__metadata_object_delete(cuesheet);
1724                                                 return false;
1725                                         }
1726                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]->is_last = false; /* the encoder will set this for us */
1727                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]->length = p;
1728                                         flac_decoder_data->num_metadata_blocks++;
1729                                 }
1730                         }
1731                 }
1732                 {
1733                         /*
1734                          * next handle vorbis comment: if any tags were specified
1735                          * or there is no existing vorbis comment, we create a
1736                          * new vorbis comment (discarding any existing one); else
1737                          * we keep the existing one.  also need to make sure to
1738                          * propagate any channel mask tag.
1739                          */
1740                         size_t i, j;
1741                         FLAC__bool vc_found = false;
1742                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1743                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
1744                                         vc_found = true;
1745                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT && options.vorbis_comment->data.vorbis_comment.num_comments > 0) {
1746                                         (void) flac__utils_get_channel_mask_tag(flac_decoder_data->metadata_blocks[i], &channel_mask);
1747                                         flac__utils_printf(stderr, 1, "%s: WARNING, replacing tags from input FLAC file with those given on the command-line\n", e->inbasefilename);
1748                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1749                                         flac_decoder_data->metadata_blocks[i] = 0;
1750                                 }
1751                                 else
1752                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1753                         }
1754                         flac_decoder_data->num_metadata_blocks = j;
1755                         if((!vc_found || options.vorbis_comment->data.vorbis_comment.num_comments > 0) && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1756                                 /* prepend ours */
1757                                 FLAC__StreamMetadata *vc = FLAC__metadata_object_clone(options.vorbis_comment);
1758                                 if(0 == vc || (channel_mask && !flac__utils_set_channel_mask_tag(vc, channel_mask))) {
1759                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for VORBIS_COMMENT block\n", e->inbasefilename);
1760                                         if(0 != cuesheet)
1761                                                 FLAC__metadata_object_delete(cuesheet);
1762                                         return false;
1763                                 }
1764                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1765                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1766                                 flac_decoder_data->metadata_blocks[1] = vc;
1767                                 flac_decoder_data->num_metadata_blocks++;
1768                         }
1769                 }
1770                 {
1771                         /*
1772                          * next handle cuesheet: if --cuesheet was specified, use
1773                          * it; else if file has existing CUESHEET and cuesheet's
1774                          * lead-out offset is correct, keep it; else no CUESHEET
1775                          */
1776                         size_t i, j;
1777                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1778                                 FLAC__bool existing_cuesheet_is_bad = false;
1779                                 /* check if existing cuesheet matches the input audio */
1780                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_CUESHEET && 0 == cuesheet) {
1781                                         const FLAC__StreamMetadata_CueSheet *cs = &flac_decoder_data->metadata_blocks[i]->data.cue_sheet;
1782                                         if(e->total_samples_to_encode == 0) {
1783                                                 flac__utils_printf(stderr, 1, "%s: WARNING, cuesheet in input FLAC file cannot be kept if input size is not known, dropping it...\n", e->inbasefilename);
1784                                                 existing_cuesheet_is_bad = true;
1785                                         }
1786                                         else if(e->total_samples_to_encode != cs->tracks[cs->num_tracks-1].offset) {
1787                                                 flac__utils_printf(stderr, 1, "%s: WARNING, lead-out offset of cuesheet in input FLAC file does not match input length, dropping existing cuesheet...\n", e->inbasefilename);
1788                                                 existing_cuesheet_is_bad = true;
1789                                         }
1790                                 }
1791                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_CUESHEET && (existing_cuesheet_is_bad || 0 != cuesheet)) {
1792                                         if(0 != cuesheet)
1793                                                 flac__utils_printf(stderr, 1, "%s: WARNING, replacing cuesheet in input FLAC file with the one given on the command-line\n", e->inbasefilename);
1794                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1795                                         flac_decoder_data->metadata_blocks[i] = 0;
1796                                 }
1797                                 else
1798                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1799                         }
1800                         flac_decoder_data->num_metadata_blocks = j;
1801                         if(0 != cuesheet && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1802                                 /* prepend ours */
1803                                 FLAC__StreamMetadata *cs = FLAC__metadata_object_clone(cuesheet);
1804                                 if(0 == cs) {
1805                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for CUESHEET block\n", e->inbasefilename);
1806                                         if(0 != cuesheet)
1807                                                 FLAC__metadata_object_delete(cuesheet);
1808                                         return false;
1809                                 }
1810                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1811                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1812                                 flac_decoder_data->metadata_blocks[1] = cs;
1813                                 flac_decoder_data->num_metadata_blocks++;
1814                         }
1815                 }
1816                 {
1817                         /*
1818                          * finally handle seektable: if -S- was specified, no
1819                          * SEEKTABLE; else if -S was specified, use it/them;
1820                          * else if file has existing SEEKTABLE and input size is
1821                          * preserved (no --skip/--until/etc specified), keep it;
1822                          * else use default seektable options
1823                          *
1824                          * note: meanings of num_requested_seek_points:
1825                          *  -1 : no -S option given, default to some value
1826                          *   0 : -S- given (no seektable)
1827                          *  >0 : one or more -S options given
1828                          */
1829                         size_t i, j;
1830                         FLAC__bool existing_seektable = false;
1831                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1832                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_SEEKTABLE)
1833                                         existing_seektable = true;
1834                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_SEEKTABLE && (e->total_samples_to_encode != flac_decoder_data->metadata_blocks[0]->data.stream_info.total_samples || options.num_requested_seek_points >= 0)) {
1835                                         if(options.num_requested_seek_points > 0)
1836                                                 flac__utils_printf(stderr, 1, "%s: WARNING, replacing seektable in input FLAC file with the one given on the command-line\n", e->inbasefilename);
1837                                         else if(options.num_requested_seek_points == 0)
1838                                                 ; /* no warning, silently delete existing SEEKTABLE since user specified --no-seektable (-S-) */
1839                                         else
1840                                                 flac__utils_printf(stderr, 1, "%s: WARNING, can't use existing seektable in input FLAC since the input size is changing or unknown, dropping existing SEEKTABLE block...\n", e->inbasefilename);
1841                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1842                                         flac_decoder_data->metadata_blocks[i] = 0;
1843                                         existing_seektable = false;
1844                                 }
1845                                 else
1846                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1847                         }
1848                         flac_decoder_data->num_metadata_blocks = j;
1849                         if((options.num_requested_seek_points > 0 || (options.num_requested_seek_points < 0 && !existing_seektable)) && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1850                                 /* prepend ours */
1851                                 FLAC__StreamMetadata *st = FLAC__metadata_object_clone(e->seek_table_template);
1852                                 if(0 == st) {
1853                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for SEEKTABLE block\n", e->inbasefilename);
1854                                         if(0 != cuesheet)
1855                                                 FLAC__metadata_object_delete(cuesheet);
1856                                         return false;
1857                                 }
1858                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1859                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1860                                 flac_decoder_data->metadata_blocks[1] = st;
1861                                 flac_decoder_data->num_metadata_blocks++;
1862                         }
1863                 }
1864                 metadata = &flac_decoder_data->metadata_blocks[1]; /* don't include STREAMINFO */
1865                 num_metadata = flac_decoder_data->num_metadata_blocks - 1;
1866         }
1867         else {
1868                 /*
1869                  * we're not encoding from FLAC so we will build the metadata
1870                  * from scratch
1871                  */
1872                 num_metadata = 0;
1873                 if(e->seek_table_template->data.seek_table.num_points > 0) {
1874                         e->seek_table_template->is_last = false; /* the encoder will set this for us */
1875                         metadata[num_metadata++] = e->seek_table_template;
1876                 }
1877                 if(0 != cuesheet)
1878                         metadata[num_metadata++] = cuesheet;
1879                 if(channel_mask) {
1880                         if(!flac__utils_set_channel_mask_tag(options.vorbis_comment, channel_mask)) {
1881                                 flac__utils_printf(stderr, 1, "%s: ERROR adding channel mask tag\n", e->inbasefilename);
1882                                 if(0 != cuesheet)
1883                                         FLAC__metadata_object_delete(cuesheet);
1884                                 return false;
1885                         }
1886                 }
1887                 metadata[num_metadata++] = options.vorbis_comment;
1888                 for(i = 0; i < options.num_pictures; i++)
1889                         metadata[num_metadata++] = options.pictures[i];
1890                 if(options.padding != 0) {
1891                         padding.is_last = false; /* the encoder will set this for us */
1892                         padding.type = FLAC__METADATA_TYPE_PADDING;
1893                         padding.length = (unsigned)(options.padding>0? options.padding : (e->total_samples_to_encode / e->sample_rate < 20*60? FLAC_ENCODE__DEFAULT_PADDING : FLAC_ENCODE__DEFAULT_PADDING*8));
1894                         metadata[num_metadata++] = &padding;
1895                 }
1896         }
1897
1898         /* check for a few things that have not already been checked.  the
1899          * FLAC__stream_encoder_init*() will check it but only return
1900          * FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA so we check some
1901          * up front to give a better error message.
1902          */
1903         if(!verify_metadata(e, metadata, num_metadata)) {
1904                 if(0 != cuesheet)
1905                         FLAC__metadata_object_delete(cuesheet);
1906                 return false;
1907         }
1908
1909         FLAC__stream_encoder_set_verify(e->encoder, options.verify);
1910         FLAC__stream_encoder_set_streamable_subset(e->encoder, !options.lax);
1911         FLAC__stream_encoder_set_channels(e->encoder, channels);
1912         FLAC__stream_encoder_set_bits_per_sample(e->encoder, bps);
1913         FLAC__stream_encoder_set_sample_rate(e->encoder, sample_rate);
1914         for(i = 0; i < options.num_compression_settings; i++) {
1915                 switch(options.compression_settings[i].type) {
1916                         case CST_BLOCKSIZE:
1917                                 FLAC__stream_encoder_set_blocksize(e->encoder, options.compression_settings[i].value.t_unsigned);
1918                                 break;
1919                         case CST_COMPRESSION_LEVEL:
1920                                 FLAC__stream_encoder_set_compression_level(e->encoder, options.compression_settings[i].value.t_unsigned);
1921                                 apodizations[0] = '\0';
1922                                 break;
1923                         case CST_DO_MID_SIDE:
1924                                 FLAC__stream_encoder_set_do_mid_side_stereo(e->encoder, options.compression_settings[i].value.t_bool);
1925                                 break;
1926                         case CST_LOOSE_MID_SIDE:
1927                                 FLAC__stream_encoder_set_loose_mid_side_stereo(e->encoder, options.compression_settings[i].value.t_bool);
1928                                 break;
1929                         case CST_APODIZATION:
1930                                 if(strlen(apodizations)+strlen(options.compression_settings[i].value.t_string)+2 >= sizeof(apodizations)) {
1931                                         flac__utils_printf(stderr, 1, "%s: ERROR: too many apodization functions requested\n", e->inbasefilename);
1932                                         if(0 != cuesheet)
1933                                                 FLAC__metadata_object_delete(cuesheet);
1934                                         return false;
1935                                 }
1936                                 else {
1937                                         strcat(apodizations, options.compression_settings[i].value.t_string);
1938                                         strcat(apodizations, ";");
1939                                 }
1940                                 break;
1941                         case CST_MAX_LPC_ORDER:
1942                                 FLAC__stream_encoder_set_max_lpc_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1943                                 break;
1944                         case CST_QLP_COEFF_PRECISION:
1945                                 FLAC__stream_encoder_set_qlp_coeff_precision(e->encoder, options.compression_settings[i].value.t_unsigned);
1946                                 break;
1947                         case CST_DO_QLP_COEFF_PREC_SEARCH:
1948                                 FLAC__stream_encoder_set_do_qlp_coeff_prec_search(e->encoder, options.compression_settings[i].value.t_bool);
1949                                 break;
1950                         case CST_DO_ESCAPE_CODING:
1951                                 FLAC__stream_encoder_set_do_escape_coding(e->encoder, options.compression_settings[i].value.t_bool);
1952                                 break;
1953                         case CST_DO_EXHAUSTIVE_MODEL_SEARCH:
1954                                 FLAC__stream_encoder_set_do_exhaustive_model_search(e->encoder, options.compression_settings[i].value.t_bool);
1955                                 break;
1956                         case CST_MIN_RESIDUAL_PARTITION_ORDER:
1957                                 FLAC__stream_encoder_set_min_residual_partition_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1958                                 break;
1959                         case CST_MAX_RESIDUAL_PARTITION_ORDER:
1960                                 FLAC__stream_encoder_set_max_residual_partition_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1961                                 break;
1962                         case CST_RICE_PARAMETER_SEARCH_DIST:
1963                                 FLAC__stream_encoder_set_rice_parameter_search_dist(e->encoder, options.compression_settings[i].value.t_unsigned);
1964                                 break;
1965                 }
1966         }
1967         if(*apodizations)
1968                 FLAC__stream_encoder_set_apodization(e->encoder, apodizations);
1969         FLAC__stream_encoder_set_total_samples_estimate(e->encoder, e->total_samples_to_encode);
1970         FLAC__stream_encoder_set_metadata(e->encoder, (num_metadata > 0)? metadata : 0, num_metadata);
1971
1972         FLAC__stream_encoder_disable_constant_subframes(e->encoder, options.debug.disable_constant_subframes);
1973         FLAC__stream_encoder_disable_fixed_subframes(e->encoder, options.debug.disable_fixed_subframes);
1974         FLAC__stream_encoder_disable_verbatim_subframes(e->encoder, options.debug.disable_verbatim_subframes);
1975
1976 #ifdef FLAC__HAS_OGG
1977         if(e->use_ogg) {
1978                 FLAC__stream_encoder_set_ogg_serial_number(e->encoder, options.serial_number);
1979
1980                 init_status = FLAC__stream_encoder_init_ogg_file(e->encoder, e->is_stdout? 0 : e->outfilename, encoder_progress_callback, /*client_data=*/e);
1981         }
1982         else
1983 #endif
1984         {
1985                 init_status = FLAC__stream_encoder_init_file(e->encoder, e->is_stdout? 0 : e->outfilename, encoder_progress_callback, /*client_data=*/e);
1986         }
1987
1988         if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
1989                 print_error_with_init_status(e, "ERROR initializing encoder", init_status);
1990                 if(FLAC__stream_encoder_get_state(e->encoder) != FLAC__STREAM_ENCODER_IO_ERROR)
1991                         e->outputfile_opened = true;
1992                 if(0 != cuesheet)
1993                         FLAC__metadata_object_delete(cuesheet);
1994                 return false;
1995         }
1996         else
1997                 e->outputfile_opened = true;
1998
1999         e->stats_mask =
2000                 (FLAC__stream_encoder_get_do_exhaustive_model_search(e->encoder) && FLAC__stream_encoder_get_do_qlp_coeff_prec_search(e->encoder))? 0x07 :
2001                 (FLAC__stream_encoder_get_do_exhaustive_model_search(e->encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(e->encoder))? 0x0f :
2002                 0x3f;
2003
2004         if(0 != cuesheet)
2005                 FLAC__metadata_object_delete(cuesheet);
2006
2007         return true;
2008 }
2009
2010 FLAC__bool EncoderSession_process(EncoderSession *e, const FLAC__int32 * const buffer[], unsigned samples)
2011 {
2012         if(e->replay_gain) {
2013                 if(!grabbag__replaygain_analyze(buffer, e->channels==2, e->bits_per_sample, samples)) {
2014                         flac__utils_printf(stderr, 1, "%s: WARNING, error while calculating ReplayGain\n", e->inbasefilename);
2015                 }
2016         }
2017
2018         return FLAC__stream_encoder_process(e->encoder, buffer, samples);
2019 }
2020
2021 FLAC__bool convert_to_seek_table_template(const char *requested_seek_points, int num_requested_seek_points, FLAC__StreamMetadata *cuesheet, EncoderSession *e)
2022 {
2023         const FLAC__bool only_placeholders = e->is_stdout;
2024         FLAC__bool has_real_points;
2025
2026         if(num_requested_seek_points == 0 && 0 == cuesheet)
2027                 return true;
2028
2029         if(num_requested_seek_points < 0) {
2030                 requested_seek_points = "10s;";
2031                 num_requested_seek_points = 1;
2032         }
2033
2034         if(num_requested_seek_points > 0) {
2035                 if(!grabbag__seektable_convert_specification_to_template(requested_seek_points, only_placeholders, e->total_samples_to_encode, e->sample_rate, e->seek_table_template, &has_real_points))
2036                         return false;
2037         }
2038
2039         if(0 != cuesheet) {
2040                 unsigned i, j;
2041                 const FLAC__StreamMetadata_CueSheet *cs = &cuesheet->data.cue_sheet;
2042                 for(i = 0; i < cs->num_tracks; i++) {
2043                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+i;
2044                         for(j = 0; j < tr->num_indices; j++) {
2045                                 if(!FLAC__metadata_object_seektable_template_append_point(e->seek_table_template, tr->offset + tr->indices[j].offset))
2046                                         return false;
2047                                 has_real_points = true;
2048                         }
2049                 }
2050                 if(has_real_points)
2051                         if(!FLAC__metadata_object_seektable_template_sort(e->seek_table_template, /*compact=*/true))
2052                                 return false;
2053         }
2054
2055         if(has_real_points) {
2056                 if(e->is_stdout) {
2057                         flac__utils_printf(stderr, 1, "%s: WARNING, cannot write back seekpoints when encoding to stdout\n", e->inbasefilename);
2058                 }
2059         }
2060
2061         return true;
2062 }
2063
2064 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
2065 {
2066         /* convert from mm:ss.sss to sample number if necessary */
2067         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
2068
2069         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
2070         if(spec->is_relative && spec->value.samples == 0) {
2071                 spec->is_relative = false;
2072                 return true;
2073         }
2074
2075         /* in any other case the total samples in the input must be known */
2076         if(total_samples_in_input == 0) {
2077                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when input length is unknown\n", inbasefilename);
2078                 return false;
2079         }
2080
2081         FLAC__ASSERT(spec->value_is_samples);
2082
2083         /* convert relative specifications to absolute */
2084         if(spec->is_relative) {
2085                 if(spec->value.samples <= 0)
2086                         spec->value.samples += (FLAC__int64)total_samples_in_input;
2087                 else
2088                         spec->value.samples += skip;
2089                 spec->is_relative = false;
2090         }
2091
2092         /* error check */
2093         if(spec->value.samples < 0) {
2094                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
2095                 return false;
2096         }
2097         if((FLAC__uint64)spec->value.samples <= skip) {
2098                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
2099                 return false;
2100         }
2101         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
2102                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
2103                 return false;
2104         }
2105
2106         return true;
2107 }
2108
2109 FLAC__bool verify_metadata(const EncoderSession *e, FLAC__StreamMetadata **metadata, unsigned num_metadata)
2110 {
2111         FLAC__bool metadata_picture_has_type1 = false;
2112         FLAC__bool metadata_picture_has_type2 = false;
2113         unsigned i;
2114
2115         FLAC__ASSERT(0 != metadata);
2116         for(i = 0; i < num_metadata; i++) {
2117                 const FLAC__StreamMetadata *m = metadata[i];
2118                 if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
2119                         if(!FLAC__format_seektable_is_legal(&m->data.seek_table)) {
2120                                 flac__utils_printf(stderr, 1, "%s: ERROR: SEEKTABLE metadata block is invalid\n", e->inbasefilename);
2121                                 return false;
2122                         }
2123                 }
2124                 else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
2125                         if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0)) {
2126                                 flac__utils_printf(stderr, 1, "%s: ERROR: CUESHEET metadata block is invalid\n", e->inbasefilename);
2127                                 return false;
2128                         }
2129                 }
2130                 else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
2131                         const char *error = 0;
2132                         if(!FLAC__format_picture_is_legal(&m->data.picture, &error)) {
2133                                 flac__utils_printf(stderr, 1, "%s: ERROR: PICTURE metadata block is invalid: %s\n", e->inbasefilename, error);
2134                                 return false;
2135                         }
2136                         if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
2137                                 if(metadata_picture_has_type1) {
2138                                         flac__utils_printf(stderr, 1, "%s: ERROR: there may only be one picture of type 1 (32x32 icon) in the file\n", e->inbasefilename);
2139                                         return false;
2140                                 }
2141                                 metadata_picture_has_type1 = true;
2142                         }
2143                         else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
2144                                 if(metadata_picture_has_type2) {
2145                                         flac__utils_printf(stderr, 1, "%s: ERROR: there may only be one picture of type 2 (icon) in the file\n", e->inbasefilename);
2146                                         return false;
2147                                 }
2148                                 metadata_picture_has_type2 = true;
2149                         }
2150                 }
2151         }
2152
2153         return true;
2154 }
2155
2156 FLAC__bool format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned shift, size_t *channel_map)
2157 {
2158         unsigned wide_sample, sample, channel, byte;
2159         FLAC__int32 *out[FLAC__MAX_CHANNELS];
2160
2161         if(0 == channel_map) {
2162                 for(channel = 0; channel < channels; channel++)
2163                         out[channel] = dest[channel];
2164         }
2165         else {
2166                 for(channel = 0; channel < channels; channel++)
2167                         out[channel] = dest[channel_map[channel]];
2168         }
2169
2170         if(bps == 8) {
2171                 if(is_unsigned_samples) {
2172                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2173                                 for(channel = 0; channel < channels; channel++, sample++)
2174                                         out[channel][wide_sample] = (FLAC__int32)ucbuffer_[sample] - 0x80;
2175                 }
2176                 else {
2177                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2178                                 for(channel = 0; channel < channels; channel++, sample++)
2179                                         out[channel][wide_sample] = (FLAC__int32)scbuffer_[sample];
2180                 }
2181         }
2182         else if(bps == 16) {
2183                 if(is_big_endian != is_big_endian_host_) {
2184                         unsigned char tmp;
2185                         const unsigned bytes = wide_samples * channels * (bps >> 3);
2186                         for(byte = 0; byte < bytes; byte += 2) {
2187                                 tmp = ucbuffer_[byte];
2188                                 ucbuffer_[byte] = ucbuffer_[byte+1];
2189                                 ucbuffer_[byte+1] = tmp;
2190                         }
2191                 }
2192                 if(is_unsigned_samples) {
2193                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2194                                 for(channel = 0; channel < channels; channel++, sample++)
2195                                         out[channel][wide_sample] = (FLAC__int32)usbuffer_[sample] - 0x8000;
2196                 }
2197                 else {
2198                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2199                                 for(channel = 0; channel < channels; channel++, sample++)
2200                                         out[channel][wide_sample] = (FLAC__int32)ssbuffer_[sample];
2201                 }
2202         }
2203         else if(bps == 24) {
2204                 if(!is_big_endian) {
2205                         unsigned char tmp;
2206                         const unsigned bytes = wide_samples * channels * (bps >> 3);
2207                         for(byte = 0; byte < bytes; byte += 3) {
2208                                 tmp = ucbuffer_[byte];
2209                                 ucbuffer_[byte] = ucbuffer_[byte+2];
2210                                 ucbuffer_[byte+2] = tmp;
2211                         }
2212                 }
2213                 if(is_unsigned_samples) {
2214                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2215                                 for(channel = 0; channel < channels; channel++, sample++) {
2216                                         out[channel][wide_sample]  = ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2217                                         out[channel][wide_sample] |= ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2218                                         out[channel][wide_sample] |= ucbuffer_[byte++];
2219                                         out[channel][wide_sample] -= 0x800000;
2220                                 }
2221                 }
2222                 else {
2223                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2224                                 for(channel = 0; channel < channels; channel++, sample++) {
2225                                         out[channel][wide_sample]  = scbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2226                                         out[channel][wide_sample] |= ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2227                                         out[channel][wide_sample] |= ucbuffer_[byte++];
2228                                 }
2229                 }
2230         }
2231         else {
2232                 FLAC__ASSERT(0);
2233         }
2234         if(shift > 0) {
2235                 FLAC__int32 mask = (1<<shift)-1;
2236                 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2237                         for(channel = 0; channel < channels; channel++) {
2238                                 if(out[channel][wide_sample] & mask) {
2239                                         flac__utils_printf(stderr, 1, "ERROR during read, sample data (channel#%u sample#%u = %d) has non-zero least-significant bits\n  WAVE/AIFF header said the last %u bits are not significant and should be zero.\n", channel, wide_sample, out[channel][wide_sample], shift);
2240                                         return false;
2241                                 }
2242                                 out[channel][wide_sample] >>= shift;
2243                         }
2244         }
2245         return true;
2246 }
2247
2248 void encoder_progress_callback(const FLAC__StreamEncoder *encoder, FLAC__uint64 bytes_written, FLAC__uint64 samples_written, unsigned frames_written, unsigned total_frames_estimate, void *client_data)
2249 {
2250         EncoderSession *encoder_session = (EncoderSession*)client_data;
2251
2252         (void)encoder, (void)total_frames_estimate;
2253
2254         encoder_session->bytes_written = bytes_written;
2255         encoder_session->samples_written = samples_written;
2256
2257         if(encoder_session->total_samples_to_encode > 0 && !((frames_written-1) & encoder_session->stats_mask))
2258                 print_stats(encoder_session);
2259 }
2260
2261 FLAC__StreamDecoderReadStatus flac_decoder_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
2262 {
2263         size_t n = 0;
2264         FLACDecoderData *data = (FLACDecoderData*)client_data;
2265         (void)decoder;
2266
2267         if (data->fatal_error)
2268                 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2269
2270         /* use up lookahead first */
2271         if (data->lookahead_length) {
2272                 n = min(data->lookahead_length, *bytes);
2273                 memcpy(buffer, data->lookahead, n);
2274                 buffer += n;
2275                 data->lookahead += n;
2276                 data->lookahead_length -= n;
2277         }
2278
2279         /* get the rest from file */
2280         if (*bytes > n) {
2281                 *bytes = n + fread(buffer, 1, *bytes-n, data->encoder_session->fin);
2282                 if(ferror(data->encoder_session->fin))
2283                         return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2284                 else if(0 == *bytes)
2285                         return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
2286                 else
2287                         return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2288         }
2289         else
2290                 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2291 }
2292
2293 FLAC__StreamDecoderSeekStatus flac_decoder_seek_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
2294 {
2295         FLACDecoderData *data = (FLACDecoderData*)client_data;
2296         (void)decoder;
2297
2298         if(fseeko(data->encoder_session->fin, (off_t)absolute_byte_offset, SEEK_SET) < 0)
2299                 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
2300         else
2301                 return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
2302 }
2303
2304 FLAC__StreamDecoderTellStatus flac_decoder_tell_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
2305 {
2306         FLACDecoderData *data = (FLACDecoderData*)client_data;
2307         off_t pos;
2308         (void)decoder;
2309
2310         if((pos = ftello(data->encoder_session->fin)) < 0)
2311                 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
2312         else {
2313                 *absolute_byte_offset = (FLAC__uint64)pos;
2314                 return FLAC__STREAM_DECODER_TELL_STATUS_OK;
2315         }
2316 }
2317
2318 FLAC__StreamDecoderLengthStatus flac_decoder_length_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
2319 {
2320         FLACDecoderData *data = (FLACDecoderData*)client_data;
2321         (void)decoder;
2322
2323         if(0 == data->filesize)
2324                 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
2325         else {
2326                 *stream_length = (FLAC__uint64)data->filesize;
2327                 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
2328         }
2329 }
2330
2331 FLAC__bool flac_decoder_eof_callback(const FLAC__StreamDecoder *decoder, void *client_data)
2332 {
2333         FLACDecoderData *data = (FLACDecoderData*)client_data;
2334         (void)decoder;
2335
2336         return feof(data->encoder_session->fin)? true : false;
2337 }
2338
2339 FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
2340 {
2341         FLACDecoderData *data = (FLACDecoderData*)client_data;
2342         FLAC__uint64 n = min(data->samples_left_to_process, frame->header.blocksize);
2343         (void)decoder;
2344
2345         if(!EncoderSession_process(data->encoder_session, buffer, (unsigned)n)) {
2346                 print_error_with_state(data->encoder_session, "ERROR during encoding");
2347                 data->fatal_error = true;
2348                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
2349         }
2350
2351         data->samples_left_to_process -= n;
2352         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
2353 }
2354
2355 void flac_decoder_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
2356 {
2357         FLACDecoderData *data = (FLACDecoderData*)client_data;
2358         (void)decoder;
2359
2360         if (data->fatal_error)
2361                 return;
2362
2363         if (
2364                 data->num_metadata_blocks == sizeof(data->metadata_blocks)/sizeof(data->metadata_blocks[0]) ||
2365                 0 == (data->metadata_blocks[data->num_metadata_blocks] = FLAC__metadata_object_clone(metadata))
2366         )
2367                 data->fatal_error = true;
2368         else
2369                 data->num_metadata_blocks++;
2370 }
2371
2372 void flac_decoder_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
2373 {
2374         FLACDecoderData *data = (FLACDecoderData*)client_data;
2375         (void)decoder;
2376
2377         flac__utils_printf(stderr, 1, "%s: ERROR got %s while decoding FLAC input\n", data->encoder_session->inbasefilename, FLAC__StreamDecoderErrorStatusString[status]);
2378         data->fatal_error = true;
2379 }
2380
2381 FLAC__bool parse_cuesheet(FLAC__StreamMetadata **cuesheet, const char *cuesheet_filename, const char *inbasefilename, FLAC__bool is_cdda, FLAC__uint64 lead_out_offset)
2382 {
2383         FILE *f;
2384         unsigned last_line_read;
2385         const char *error_message;
2386
2387         if(0 == cuesheet_filename)
2388                 return true;
2389
2390         if(lead_out_offset == 0) {
2391                 flac__utils_printf(stderr, 1, "%s: ERROR cannot import cuesheet when the number of input samples to encode is unknown\n", inbasefilename);
2392                 return false;
2393         }
2394
2395         if(0 == (f = fopen(cuesheet_filename, "r"))) {
2396                 flac__utils_printf(stderr, 1, "%s: ERROR opening cuesheet \"%s\" for reading: %s\n", inbasefilename, cuesheet_filename, strerror(errno));
2397                 return false;
2398         }
2399
2400         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, is_cdda, lead_out_offset);
2401
2402         fclose(f);
2403
2404         if(0 == *cuesheet) {
2405                 flac__utils_printf(stderr, 1, "%s: ERROR parsing cuesheet \"%s\" on line %u: %s\n", inbasefilename, cuesheet_filename, last_line_read, error_message);
2406                 return false;
2407         }
2408
2409         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
2410                 flac__utils_printf(stderr, 1, "%s: ERROR parsing cuesheet \"%s\": %s\n", inbasefilename, cuesheet_filename, error_message);
2411                 return false;
2412         }
2413
2414         /* if we're expecting CDDA, warn about non-compliance */
2415         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
2416                 flac__utils_printf(stderr, 1, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", inbasefilename, cuesheet_filename, error_message);
2417                 (*cuesheet)->data.cue_sheet.is_cd = false;
2418         }
2419
2420         return true;
2421 }
2422
2423 void print_stats(const EncoderSession *encoder_session)
2424 {
2425         const FLAC__uint64 samples_written = min(encoder_session->total_samples_to_encode, encoder_session->samples_written);
2426 #if defined _MSC_VER || defined __MINGW32__
2427         /* with MSVC you have to spoon feed it the casting */
2428         const double progress = (double)(FLAC__int64)samples_written / (double)(FLAC__int64)encoder_session->total_samples_to_encode;
2429         const double ratio = (double)(FLAC__int64)encoder_session->bytes_written / ((double)(FLAC__int64)encoder_session->unencoded_size * min(1.0, progress));
2430 #else
2431         const double progress = (double)samples_written / (double)encoder_session->total_samples_to_encode;
2432         const double ratio = (double)encoder_session->bytes_written / ((double)encoder_session->unencoded_size * min(1.0, progress));
2433 #endif
2434
2435         if(samples_written == encoder_session->total_samples_to_encode) {
2436                 flac__utils_printf(stderr, 2, "\r%s:%s wrote %u bytes, ratio=%0.3f",
2437                         encoder_session->inbasefilename,
2438                         encoder_session->verify? " Verify OK," : "",
2439                         (unsigned)encoder_session->bytes_written,
2440                         ratio
2441                 );
2442         }
2443         else {
2444                 flac__utils_printf(stderr, 2, "\r%s: %u%% complete, ratio=%0.3f", encoder_session->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
2445         }
2446 }
2447
2448 void print_error_with_init_status(const EncoderSession *e, const char *message, FLAC__StreamEncoderInitStatus init_status)
2449 {
2450         const int ilen = strlen(e->inbasefilename) + 1;
2451         const char *state_string = "";
2452
2453         flac__utils_printf(stderr, 1, "\n%s: %s\n", e->inbasefilename, message);
2454
2455         flac__utils_printf(stderr, 1, "%*s init_status = %s\n", ilen, "", FLAC__StreamEncoderInitStatusString[init_status]);
2456
2457         if(init_status == FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR) {
2458                 state_string = FLAC__stream_encoder_get_resolved_state_string(e->encoder);
2459
2460                 flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", state_string);
2461
2462                 /* print out some more info for some errors: */
2463                 if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_CLIENT_ERROR])) {
2464                         flac__utils_printf(stderr, 1,
2465                                 "\n"
2466                                 "An error occurred while writing; the most common cause is that the disk is full.\n"
2467                         );
2468                 }
2469                 else if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_IO_ERROR])) {
2470                         flac__utils_printf(stderr, 1,
2471                                 "\n"
2472                                 "An error occurred opening the output file; it is likely that the output\n"
2473                                 "directory does not exist or is not writable, the output file already exists and\n"
2474                                 "is not writable, or the disk is full.\n"
2475                         );
2476                 }
2477         }
2478         else if(init_status == FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE) {
2479                 flac__utils_printf(stderr, 1,
2480                         "\n"
2481                         "The encoding parameters specified do not conform to the FLAC Subset and may not\n"
2482                         "be streamable or playable in hardware devices.  If you really understand the\n"
2483                         "consequences, you can add --lax to the command-line options to encode with\n"
2484                         "these parameters anyway.  See http://flac.sourceforge.net/format.html#subset\n"
2485                 );
2486         }
2487 }
2488
2489 void print_error_with_state(const EncoderSession *e, const char *message)
2490 {
2491         const int ilen = strlen(e->inbasefilename) + 1;
2492         const char *state_string;
2493
2494         flac__utils_printf(stderr, 1, "\n%s: %s\n", e->inbasefilename, message);
2495
2496         state_string = FLAC__stream_encoder_get_resolved_state_string(e->encoder);
2497
2498         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", state_string);
2499
2500         /* print out some more info for some errors: */
2501         if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_CLIENT_ERROR])) {
2502                 flac__utils_printf(stderr, 1,
2503                         "\n"
2504                         "An error occurred while writing; the most common cause is that the disk is full.\n"
2505                 );
2506         }
2507 }
2508
2509 void print_verify_error(EncoderSession *e)
2510 {
2511         FLAC__uint64 absolute_sample;
2512         unsigned frame_number;
2513         unsigned channel;
2514         unsigned sample;
2515         FLAC__int32 expected;
2516         FLAC__int32 got;
2517
2518         FLAC__stream_encoder_get_verify_decoder_error_stats(e->encoder, &absolute_sample, &frame_number, &channel, &sample, &expected, &got);
2519
2520         flac__utils_printf(stderr, 1, "%s: ERROR: mismatch in decoded data, verify FAILED!\n", e->inbasefilename);
2521         flac__utils_printf(stderr, 1, "       Absolute sample=%u, frame=%u, channel=%u, sample=%u, expected %d, got %d\n", (unsigned)absolute_sample, frame_number, channel, sample, expected, got);
2522         flac__utils_printf(stderr, 1, "       In all known cases, verify errors are caused by hardware problems,\n");
2523         flac__utils_printf(stderr, 1, "       usually overclocking or bad RAM.  Delete %s\n", e->outfilename);
2524         flac__utils_printf(stderr, 1, "       and repeat the flac command exactly as before.  If it does not give a\n");
2525         flac__utils_printf(stderr, 1, "       verify error in the exact same place each time you try it, then there is\n");
2526         flac__utils_printf(stderr, 1, "       a problem with your hardware; please see the FAQ:\n");
2527         flac__utils_printf(stderr, 1, "           http://flac.sourceforge.net/faq.html#tools__hardware_prob\n");
2528         flac__utils_printf(stderr, 1, "       If it does fail in the exact same place every time, keep\n");
2529         flac__utils_printf(stderr, 1, "       %s and submit a bug report to:\n", e->outfilename);
2530         flac__utils_printf(stderr, 1, "           https://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
2531         flac__utils_printf(stderr, 1, "       Make sure to upload the FLAC file and use the \"Monitor\" feature to\n");
2532         flac__utils_printf(stderr, 1, "       monitor the bug status.\n");
2533         flac__utils_printf(stderr, 1, "Verify FAILED!  Do not trust %s\n", e->outfilename);
2534 }
2535
2536 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
2537 {
2538         size_t bytes_read = fread(val, 1, 2, f);
2539
2540         if(bytes_read == 0) {
2541                 if(!eof_ok) {
2542                         flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2543                         return false;
2544                 }
2545                 else
2546                         return true;
2547         }
2548         else if(bytes_read < 2) {
2549                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2550                 return false;
2551         }
2552         else {
2553                 if(is_big_endian_host_) {
2554                         FLAC__byte tmp, *b = (FLAC__byte*)val;
2555                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
2556                 }
2557                 return true;
2558         }
2559 }
2560
2561 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2562 {
2563         size_t bytes_read = fread(val, 1, 4, f);
2564
2565         if(bytes_read == 0) {
2566                 if(!eof_ok) {
2567                         flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2568                         return false;
2569                 }
2570                 else
2571                         return true;
2572         }
2573         else if(bytes_read < 4) {
2574                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2575                 return false;
2576         }
2577         else {
2578                 if(is_big_endian_host_) {
2579                         FLAC__byte tmp, *b = (FLAC__byte*)val;
2580                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
2581                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
2582                 }
2583                 return true;
2584         }
2585 }
2586
2587 FLAC__bool read_big_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
2588 {
2589         unsigned char buf[4];
2590         size_t bytes_read= fread(buf, 1, 2, f);
2591
2592         if(bytes_read==0U && eof_ok)
2593                 return true;
2594         else if(bytes_read<2U) {
2595                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2596                 return false;
2597         }
2598
2599         /* this is independent of host endianness */
2600         *val= (FLAC__uint16)(buf[0])<<8 | buf[1];
2601
2602         return true;
2603 }
2604
2605 FLAC__bool read_big_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2606 {
2607         unsigned char buf[4];
2608         size_t bytes_read= fread(buf, 1, 4, f);
2609
2610         if(bytes_read==0U && eof_ok)
2611                 return true;
2612         else if(bytes_read<4U) {
2613                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2614                 return false;
2615         }
2616
2617         /* this is independent of host endianness */
2618         *val= (FLAC__uint32)(buf[0])<<24 | (FLAC__uint32)(buf[1])<<16 |
2619                 (FLAC__uint32)(buf[2])<<8 | buf[3];
2620
2621         return true;
2622 }
2623
2624 FLAC__bool read_sane_extended(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2625         /* Read an IEEE 754 80-bit (aka SANE) extended floating point value from 'f',
2626          * convert it into an integral value and store in 'val'.  Return false if only
2627          * between 1 and 9 bytes remain in 'f', if 0 bytes remain in 'f' and 'eof_ok' is
2628          * false, or if the value is negative, between zero and one, or too large to be
2629          * represented by 'val'; return true otherwise.
2630          */
2631 {
2632         unsigned int i;
2633         unsigned char buf[10];
2634         size_t bytes_read= fread(buf, 1U, 10U, f);
2635         FLAC__int16 e= ((FLAC__uint16)(buf[0])<<8 | (FLAC__uint16)(buf[1]))-0x3FFF;
2636         FLAC__int16 shift= 63-e;
2637         FLAC__uint64 p= 0U;
2638
2639         if(bytes_read==0U && eof_ok)
2640                 return true;
2641         else if(bytes_read<10U) {
2642                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2643                 return false;
2644         }
2645         else if((buf[0]>>7)==1U || e<0 || e>63) {
2646                 flac__utils_printf(stderr, 1, "%s: ERROR: invalid floating-point value\n", fn);
2647                 return false;
2648         }
2649
2650         for(i= 0U; i<8U; ++i)
2651                 p|= (FLAC__uint64)(buf[i+2])<<(56U-i*8);
2652         *val= (FLAC__uint32)((p>>shift)+(p>>(shift-1) & 0x1));
2653
2654         return true;
2655 }
2656
2657 FLAC__bool fskip_ahead(FILE *f, FLAC__uint64 offset)
2658 {
2659         static unsigned char dump[8192];
2660
2661         while(offset > 0) {
2662                 long need = (long)min(offset, LONG_MAX);
2663                 if(fseeko(f, need, SEEK_CUR) < 0) {
2664                         need = (long)min(offset, sizeof(dump));
2665                         if((long)fread(dump, 1, need, f) < need)
2666                                 return false;
2667                 }
2668                 offset -= need;
2669         }
2670 #if 0 /* pure non-fseek() version */
2671         while(offset > 0) {
2672                 const long need = (long)min(offset, sizeof(dump));
2673                 if(fread(dump, 1, need, f) < need)
2674                         return false;
2675                 offset -= need;
2676         }
2677 #endif
2678         return true;
2679 }
2680
2681 unsigned count_channel_mask_bits(FLAC__uint32 mask)
2682 {
2683         unsigned count = 0;
2684         while(mask) {
2685                 if(mask & 1)
2686                         count++;
2687                 mask >>= 1;
2688         }
2689         return count;
2690 }
2691
2692 FLAC__uint32 limit_channel_mask(FLAC__uint32 mask, unsigned channels)
2693 {
2694         FLAC__uint32 x = 0x80000000;
2695         unsigned count = count_channel_mask_bits(mask);
2696         while(x && count > channels) {
2697                 if(mask & x) {
2698                         mask &= ~x;
2699                         count--;
2700                 }
2701                 x >>= 1;
2702         }
2703         FLAC__ASSERT(count_channel_mask_bits(mask) == channels);
2704         return mask;
2705 }