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                         pad = (data_bytes & 1U) ? true : false;
 887
 888                         bytes_per_wide_sample = channels * (bps >> 3);
 889
 890                         /* *options.common.align_reservoir_samples will be 0 unless --sector-align is used */
 891                         FLAC__ASSERT(options.common.sector_align || *options.common.align_reservoir_samples == 0);
 892                         total_samples_in_input = data_bytes / bytes_per_wide_sample + *options.common.align_reservoir_samples;
 893
 894                         /*
 895                          * now that we know the input size, canonicalize the
 896                          * --until string to an absolute sample number:
 897                          */
 898                         if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, sample_rate, encoder_session.skip, total_samples_in_input))
 899                                 return EncoderSession_finish_error(&encoder_session);
 900                         encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
 901                         FLAC__ASSERT(!options.common.sector_align || encoder_session.until == 0);
 902
 903                         if(encoder_session.skip > 0) {
 904                                 if(!fskip_ahead(infile, encoder_session.skip * bytes_per_wide_sample)) {
 905                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 906                                         return EncoderSession_finish_error(&encoder_session);
 907                                 }
 908                         }
 909
 910                         data_bytes -= (unsigned)encoder_session.skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
 911                         encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
 912                         if(encoder_session.until > 0) {
 913                                 trim = total_samples_in_input - encoder_session.until;
 914                                 FLAC__ASSERT(total_samples_in_input > 0);
 915                                 FLAC__ASSERT(!options.common.sector_align);
 916                                 data_bytes -= (unsigned int)trim * bytes_per_wide_sample;
 917                                 encoder_session.total_samples_to_encode -= trim;
 918                         }
 919                         if(options.common.sector_align) {
 920                                 align_remainder = (unsigned)(encoder_session.total_samples_to_encode % 588);
 921                                 if(options.common.is_last_file)
 922                                         encoder_session.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
 923                                 else
 924                                         encoder_session.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
 925                         }
 926
 927                         /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
 928                         encoder_session.unencoded_size = encoder_session.total_samples_to_encode * bytes_per_wide_sample + 44;
 929
 930                         if(!EncoderSession_init_encoder(&encoder_session, options.common, channel_mask, channels, bps-shift, sample_rate, /*flac_decoder_data=*/0))
 931                                 return EncoderSession_finish_error(&encoder_session);
 932
 933                         /*
 934                          * first do any samples in the reservoir
 935                          */
 936                         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
 937                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
 938                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 939                                         return EncoderSession_finish_error(&encoder_session);
 940                                 }
 941                         }
 942
 943                         /*
 944                          * decrement the data_bytes counter if we need to align the file
 945                          */
 946                         if(options.common.sector_align) {
 947                                 if(options.common.is_last_file) {
 948                                         *options.common.align_reservoir_samples = 0;
 949                                 }
 950                                 else {
 951                                         *options.common.align_reservoir_samples = align_remainder;
 952                                         data_bytes -= (*options.common.align_reservoir_samples) * bytes_per_wide_sample;
 953                                 }
 954                         }
 955
 956                         /*
 957                          * now do from the file
 958                          */
 959                         while(data_bytes > 0) {
 960                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
 961                                 if(bytes_read == 0) {
 962                                         if(ferror(infile)) {
 963                                                 flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
 964                                                 return EncoderSession_finish_error(&encoder_session);
 965                                         }
 966                                         else if(feof(infile)) {
 967                                                 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);
 968                                                 data_bytes = 0;
 969                                         }
 970                                 }
 971                                 else {
 972                                         if(bytes_read % bytes_per_wide_sample != 0) {
 973                                                 flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
 974                                                 return EncoderSession_finish_error(&encoder_session);
 975                                         }
 976                                         else {
 977                                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 978                                                 if(!format_input(input_, wide_samples, /*is_big_endian=*/false, is_unsigned_samples, channels, bps, shift, channel_map))
 979                                                         return EncoderSession_finish_error(&encoder_session);
 980
 981                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
 982                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
 983                                                         return EncoderSession_finish_error(&encoder_session);
 984                                                 }
 985                                                 data_bytes -= bytes_read;
 986                                         }
 987                                 }
 988                         }
 989
 990                         if(trim > 0) {
 991                                 FLAC__ASSERT(!options.common.sector_align);
 992                                 if(!fskip_ahead(infile, trim * bytes_per_wide_sample)) {
 993                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
 994                                         return EncoderSession_finish_error(&encoder_session);
 995                                 }
 996                         }
 997
 998                         /*
 999                          * now read unaligned samples into reservoir or pad with zeroes if necessary
1000                          */
1001                         if(options.common.sector_align) {
1002                                 if(options.common.is_last_file) {
1003                                         unsigned wide_samples = 588 - align_remainder;
1004                                         if(wide_samples < 588) {
1005                                                 unsigned channel;
1006
1007                                                 info_align_zero = wide_samples;
1008                                                 for(channel = 0; channel < channels; channel++)
1009                                                         memset(input_[channel], 0, sizeof(input_[0][0]) * wide_samples);
1010
1011                                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1012                                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1013                                                         return EncoderSession_finish_error(&encoder_session);
1014                                                 }
1015                                         }
1016                                 }
1017                                 else {
1018                                         if(*options.common.align_reservoir_samples > 0) {
1019                                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
1020                                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
1021                                                 if(bytes_read == 0 && ferror(infile)) {
1022                                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1023                                                         return EncoderSession_finish_error(&encoder_session);
1024                                                 }
1025                                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
1026                                                         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);
1027                                                 }
1028                                                 else {
1029                                                         info_align_carry = *options.common.align_reservoir_samples;
1030                                                         if(!format_input(options.common.align_reservoir, *options.common.align_reservoir_samples, /*is_big_endian=*/false, is_unsigned_samples, channels, bps, shift, channel_map))
1031                                                                 return EncoderSession_finish_error(&encoder_session);
1032                                                 }
1033                                         }
1034                                 }
1035                         }
1036
1037                         if(pad == true) {
1038                                 unsigned char tmp;
1039
1040                                 if(fread(&tmp, 1U, 1U, infile) < 1U) {
1041                                         flac__utils_printf(stderr, 1, "%s: ERROR during read of data pad byte\n", encoder_session.inbasefilename);
1042                                         return EncoderSession_finish_error(&encoder_session);
1043                                 }
1044                         }
1045
1046                         got_data_chunk = true;
1047                 }
1048                 else {
1049                         if(xx == 0x20746d66 && got_fmt_chunk) { /* "fmt " */
1050                                 flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_session.inbasefilename);
1051                         }
1052                         else if(xx == 0x61746164) { /* "data" */
1053                                 if(got_data_chunk) {
1054                                         flac__utils_printf(stderr, 1, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_session.inbasefilename);
1055                                 }
1056                                 else if(!got_fmt_chunk) {
1057                                         flac__utils_printf(stderr, 1, "%s: ERROR: got 'data' sub-chunk before 'fmt' sub-chunk\n", encoder_session.inbasefilename);
1058                                         return EncoderSession_finish_error(&encoder_session);
1059                                 }
1060                                 else {
1061                                         FLAC__ASSERT(0);
1062                                 }
1063                         }
1064                         else {
1065                                 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));
1066                         }
1067                         /* sub-chunk size */
1068                         if(!read_little_endian_uint32(infile, &xx, false, encoder_session.inbasefilename))
1069                                 return EncoderSession_finish_error(&encoder_session);
1070                         else {
1071                                 unsigned long skip = xx+(xx & 1U);
1072
1073                                 FLAC__ASSERT(skip<=LONG_MAX);
1074                                 if(!fskip_ahead(infile, skip)) {
1075                                         flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_session.inbasefilename);
1076                                         return EncoderSession_finish_error(&encoder_session);
1077                                 }
1078                         }
1079                 }
1080         }
1081
1082         return EncoderSession_finish_ok(&encoder_session, info_align_carry, info_align_zero);
1083 }
1084
1085 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)
1086 {
1087         EncoderSession encoder_session;
1088         size_t bytes_read;
1089         const size_t bytes_per_wide_sample = options.channels * (options.bps >> 3);
1090         unsigned align_remainder = 0;
1091         int info_align_carry = -1, info_align_zero = -1;
1092         FLAC__uint64 total_samples_in_input = 0;
1093
1094         FLAC__ASSERT(!options.common.sector_align || options.channels == 2);
1095         FLAC__ASSERT(!options.common.sector_align || options.bps == 16);
1096         FLAC__ASSERT(!options.common.sector_align || options.sample_rate == 44100);
1097         FLAC__ASSERT(!options.common.sector_align || infilesize >= 0);
1098         FLAC__ASSERT(!options.common.replay_gain || options.channels <= 2);
1099         FLAC__ASSERT(!options.common.replay_gain || grabbag__replaygain_is_valid_sample_frequency(options.sample_rate));
1100
1101         if(!
1102                 EncoderSession_construct(
1103                         &encoder_session,
1104 #ifdef FLAC__HAS_OGG
1105                         options.common.use_ogg,
1106 #else
1107                         /*use_ogg=*/false,
1108 #endif
1109                         options.common.verify,
1110                         infile,
1111                         infilename,
1112                         outfilename
1113                 )
1114         )
1115                 return 1;
1116
1117         /*
1118          * now that we know the sample rate, canonicalize the
1119          * --skip string to a number of samples:
1120          */
1121         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, options.sample_rate);
1122         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
1123         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
1124         FLAC__ASSERT(!options.common.sector_align || encoder_session.skip == 0);
1125
1126         if(infilesize < 0)
1127                 total_samples_in_input = 0;
1128         else {
1129                 /* *options.common.align_reservoir_samples will be 0 unless --sector-align is used */
1130                 FLAC__ASSERT(options.common.sector_align || *options.common.align_reservoir_samples == 0);
1131                 total_samples_in_input = (FLAC__uint64)infilesize / bytes_per_wide_sample + *options.common.align_reservoir_samples;
1132         }
1133
1134         /*
1135          * now that we know the input size, canonicalize the
1136          * --until strings to a number of samples:
1137          */
1138         if(!canonicalize_until_specification(&options.common.until_specification, encoder_session.inbasefilename, options.sample_rate, encoder_session.skip, total_samples_in_input))
1139                 return EncoderSession_finish_error(&encoder_session);
1140         encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
1141         FLAC__ASSERT(!options.common.sector_align || encoder_session.until == 0);
1142
1143         infilesize -= (off_t)encoder_session.skip * bytes_per_wide_sample;
1144         encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
1145         if(encoder_session.until > 0) {
1146                 const FLAC__uint64 trim = total_samples_in_input - encoder_session.until;
1147                 FLAC__ASSERT(total_samples_in_input > 0);
1148                 FLAC__ASSERT(!options.common.sector_align);
1149                 infilesize -= (off_t)trim * bytes_per_wide_sample;
1150                 encoder_session.total_samples_to_encode -= trim;
1151         }
1152         if(infilesize >= 0 && options.common.sector_align) {
1153                 FLAC__ASSERT(encoder_session.skip == 0);
1154                 align_remainder = (unsigned)(encoder_session.total_samples_to_encode % 588);
1155                 if(options.common.is_last_file)
1156                         encoder_session.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
1157                 else
1158                         encoder_session.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
1159         }
1160         encoder_session.unencoded_size = encoder_session.total_samples_to_encode * bytes_per_wide_sample;
1161
1162         if(encoder_session.total_samples_to_encode <= 0)
1163                 flac__utils_printf(stderr, 2, "(No runtime statistics possible; please wait for encoding to finish...)\n");
1164
1165         if(encoder_session.skip > 0) {
1166                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)encoder_session.skip;
1167                 if(skip_bytes > lookahead_length) {
1168                         skip_bytes -= lookahead_length;
1169                         lookahead_length = 0;
1170                         if(!fskip_ahead(infile, skip_bytes)) {
1171                                 flac__utils_printf(stderr, 1, "%s: ERROR during read while skipping samples\n", encoder_session.inbasefilename);
1172                                 return EncoderSession_finish_error(&encoder_session);
1173                         }
1174                 }
1175                 else {
1176                         lookahead += skip_bytes;
1177                         lookahead_length -= skip_bytes;
1178                 }
1179         }
1180
1181         if(!EncoderSession_init_encoder(&encoder_session, options.common, /*channel_mask=*/0, options.channels, options.bps, options.sample_rate, /*flac_decoder_data=*/0))
1182                 return EncoderSession_finish_error(&encoder_session);
1183
1184         /*
1185          * first do any samples in the reservoir
1186          */
1187         if(options.common.sector_align && *options.common.align_reservoir_samples > 0) {
1188                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)options.common.align_reservoir, *options.common.align_reservoir_samples)) {
1189                         print_error_with_state(&encoder_session, "ERROR during encoding");
1190                         return EncoderSession_finish_error(&encoder_session);
1191                 }
1192         }
1193
1194         /*
1195          * decrement infilesize if we need to align the file
1196          */
1197         if(options.common.sector_align) {
1198                 FLAC__ASSERT(infilesize >= 0);
1199                 if(options.common.is_last_file) {
1200                         *options.common.align_reservoir_samples = 0;
1201                 }
1202                 else {
1203                         *options.common.align_reservoir_samples = align_remainder;
1204                         infilesize -= (off_t)((*options.common.align_reservoir_samples) * bytes_per_wide_sample);
1205                         FLAC__ASSERT(infilesize >= 0);
1206                 }
1207         }
1208
1209         /*
1210          * now do from the file
1211          */
1212         if(infilesize < 0) {
1213                 while(!feof(infile)) {
1214                         if(lookahead_length > 0) {
1215                                 FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
1216                                 memcpy(ucbuffer_, lookahead, lookahead_length);
1217                                 bytes_read = fread(ucbuffer_+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
1218                                 if(ferror(infile)) {
1219                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1220                                         return EncoderSession_finish_error(&encoder_session);
1221                                 }
1222                                 lookahead_length = 0;
1223                         }
1224                         else
1225                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
1226
1227                         if(bytes_read == 0) {
1228                                 if(ferror(infile)) {
1229                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1230                                         return EncoderSession_finish_error(&encoder_session);
1231                                 }
1232                         }
1233                         else if(bytes_read % bytes_per_wide_sample != 0) {
1234                                 flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
1235                                 return EncoderSession_finish_error(&encoder_session);
1236                         }
1237                         else {
1238                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
1239                                 if(!format_input(input_, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, /*shift=*/0, /*channel_map=*/0))
1240                                         return EncoderSession_finish_error(&encoder_session);
1241
1242                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1243                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1244                                         return EncoderSession_finish_error(&encoder_session);
1245                                 }
1246                         }
1247                 }
1248         }
1249         else {
1250                 const FLAC__uint64 max_input_bytes = infilesize;
1251                 FLAC__uint64 total_input_bytes_read = 0;
1252                 while(total_input_bytes_read < max_input_bytes) {
1253                         {
1254                                 size_t wanted = (CHUNK_OF_SAMPLES * bytes_per_wide_sample);
1255                                 wanted = (size_t) min((FLAC__uint64)wanted, max_input_bytes - total_input_bytes_read);
1256
1257                                 if(lookahead_length > 0) {
1258                                         FLAC__ASSERT(lookahead_length <= wanted);
1259                                         memcpy(ucbuffer_, lookahead, lookahead_length);
1260                                         wanted -= lookahead_length;
1261                                         bytes_read = lookahead_length;
1262                                         if(wanted > 0) {
1263                                                 bytes_read += fread(ucbuffer_+lookahead_length, sizeof(unsigned char), wanted, infile);
1264                                                 if(ferror(infile)) {
1265                                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1266                                                         return EncoderSession_finish_error(&encoder_session);
1267                                                 }
1268                                         }
1269                                         lookahead_length = 0;
1270                                 }
1271                                 else
1272                                         bytes_read = fread(ucbuffer_, sizeof(unsigned char), wanted, infile);
1273                         }
1274
1275                         if(bytes_read == 0) {
1276                                 if(ferror(infile)) {
1277                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1278                                         return EncoderSession_finish_error(&encoder_session);
1279                                 }
1280                                 else if(feof(infile)) {
1281                                         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);
1282                                         total_input_bytes_read = max_input_bytes;
1283                                 }
1284                         }
1285                         else {
1286                                 if(bytes_read % bytes_per_wide_sample != 0) {
1287                                         flac__utils_printf(stderr, 1, "%s: ERROR: got partial sample\n", encoder_session.inbasefilename);
1288                                         return EncoderSession_finish_error(&encoder_session);
1289                                 }
1290                                 else {
1291                                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
1292                                         if(!format_input(input_, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, /*shift=*/0, /*channel_map=*/0))
1293                                                 return EncoderSession_finish_error(&encoder_session);
1294
1295                                         if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1296                                                 print_error_with_state(&encoder_session, "ERROR during encoding");
1297                                                 return EncoderSession_finish_error(&encoder_session);
1298                                         }
1299                                         total_input_bytes_read += bytes_read;
1300                                 }
1301                         }
1302                 }
1303         }
1304
1305         /*
1306          * now read unaligned samples into reservoir or pad with zeroes if necessary
1307          */
1308         if(options.common.sector_align) {
1309                 if(options.common.is_last_file) {
1310                         unsigned wide_samples = 588 - align_remainder;
1311                         if(wide_samples < 588) {
1312                                 unsigned channel;
1313
1314                                 info_align_zero = wide_samples;
1315                                 for(channel = 0; channel < options.channels; channel++)
1316                                         memset(input_[channel], 0, sizeof(input_[0][0]) * wide_samples);
1317
1318                                 if(!EncoderSession_process(&encoder_session, (const FLAC__int32 * const *)input_, wide_samples)) {
1319                                         print_error_with_state(&encoder_session, "ERROR during encoding");
1320                                         return EncoderSession_finish_error(&encoder_session);
1321                                 }
1322                         }
1323                 }
1324                 else {
1325                         if(*options.common.align_reservoir_samples > 0) {
1326                                 FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
1327                                 bytes_read = fread(ucbuffer_, sizeof(unsigned char), (*options.common.align_reservoir_samples) * bytes_per_wide_sample, infile);
1328                                 if(bytes_read == 0 && ferror(infile)) {
1329                                         flac__utils_printf(stderr, 1, "%s: ERROR during read\n", encoder_session.inbasefilename);
1330                                         return EncoderSession_finish_error(&encoder_session);
1331                                 }
1332                                 else if(bytes_read != (*options.common.align_reservoir_samples) * bytes_per_wide_sample) {
1333                                         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);
1334                                 }
1335                                 else {
1336                                         info_align_carry = *options.common.align_reservoir_samples;
1337                                         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))
1338                                                 return EncoderSession_finish_error(&encoder_session);
1339                                 }
1340                         }
1341                 }
1342         }
1343
1344         return EncoderSession_finish_ok(&encoder_session, info_align_carry, info_align_zero);
1345 }
1346
1347 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)
1348 {
1349         EncoderSession encoder_session;
1350         FLAC__StreamDecoder *decoder = 0;
1351         FLACDecoderData decoder_data;
1352         size_t i;
1353         int retval;
1354
1355         if(!
1356                 EncoderSession_construct(
1357                         &encoder_session,
1358 #ifdef FLAC__HAS_OGG
1359                         options.common.use_ogg,
1360 #else
1361                         /*use_ogg=*/false,
1362 #endif
1363                         options.common.verify,
1364                         infile,
1365                         infilename,
1366                         outfilename
1367                 )
1368         )
1369                 return 1;
1370
1371         decoder_data.encoder_session = &encoder_session;
1372         decoder_data.filesize = (infilesize == (off_t)(-1)? 0 : infilesize);
1373         decoder_data.lookahead = lookahead;
1374         decoder_data.lookahead_length = lookahead_length;
1375         decoder_data.num_metadata_blocks = 0;
1376         decoder_data.samples_left_to_process = 0;
1377         decoder_data.fatal_error = false;
1378
1379         /*
1380          * set up FLAC decoder for the input
1381          */
1382         if (0 == (decoder = FLAC__stream_decoder_new())) {
1383                 flac__utils_printf(stderr, 1, "%s: ERROR: creating decoder for FLAC input\n", encoder_session.inbasefilename);
1384                 return EncoderSession_finish_error(&encoder_session);
1385         }
1386         if (!(
1387                 FLAC__stream_decoder_set_md5_checking(decoder, false) &&
1388                 FLAC__stream_decoder_set_metadata_respond_all(decoder)
1389         )) {
1390                 flac__utils_printf(stderr, 1, "%s: ERROR: setting up decoder for FLAC input\n", encoder_session.inbasefilename);
1391                 goto fubar1; /*@@@ yuck */
1392         }
1393
1394         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) {
1395                 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));
1396                 goto fubar1; /*@@@ yuck */
1397         }
1398
1399         if (!FLAC__stream_decoder_process_until_end_of_metadata(decoder) || decoder_data.fatal_error) {
1400                 if (decoder_data.fatal_error)
1401                         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);
1402                 else
1403                         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));
1404                 goto fubar1; /*@@@ yuck */
1405         }
1406
1407         if (decoder_data.num_metadata_blocks == 0) {
1408                 flac__utils_printf(stderr, 1, "%s: ERROR: reading metadata in FLAC input, got no metadata blocks\n", encoder_session.inbasefilename);
1409                 goto fubar2; /*@@@ yuck */
1410         }
1411         else if (decoder_data.metadata_blocks[0]->type != FLAC__METADATA_TYPE_STREAMINFO) {
1412                 flac__utils_printf(stderr, 1, "%s: ERROR: reading metadata in FLAC input, first metadata block is not STREAMINFO\n", encoder_session.inbasefilename);
1413                 goto fubar2; /*@@@ yuck */
1414         }
1415         else if (decoder_data.metadata_blocks[0]->data.stream_info.total_samples == 0) {
1416                 flac__utils_printf(stderr, 1, "%s: ERROR: FLAC input has STREAMINFO with unknown total samples which is not supported\n", encoder_session.inbasefilename);
1417                 goto fubar2; /*@@@ yuck */
1418         }
1419
1420         /*
1421          * now that we have the STREAMINFO and know the sample rate,
1422          * canonicalize the --skip string to a number of samples:
1423          */
1424         flac__utils_canonicalize_skip_until_specification(&options.common.skip_specification, decoder_data.metadata_blocks[0]->data.stream_info.sample_rate);
1425         FLAC__ASSERT(options.common.skip_specification.value.samples >= 0);
1426         encoder_session.skip = (FLAC__uint64)options.common.skip_specification.value.samples;
1427         FLAC__ASSERT(!options.common.sector_align); /* --sector-align with FLAC input is not supported */
1428
1429         {
1430                 FLAC__uint64 total_samples_in_input, trim = 0;
1431
1432                 total_samples_in_input = decoder_data.metadata_blocks[0]->data.stream_info.total_samples;
1433
1434                 /*
1435                  * now that we know the input size, canonicalize the
1436                  * --until string to an absolute sample number:
1437                  */
1438                 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))
1439                         goto fubar2; /*@@@ yuck */
1440                 encoder_session.until = (FLAC__uint64)options.common.until_specification.value.samples;
1441
1442                 encoder_session.total_samples_to_encode = total_samples_in_input - encoder_session.skip;
1443                 if(encoder_session.until > 0) {
1444                         trim = total_samples_in_input - encoder_session.until;
1445                         FLAC__ASSERT(total_samples_in_input > 0);
1446                         encoder_session.total_samples_to_encode -= trim;
1447                 }
1448
1449                 encoder_session.unencoded_size = decoder_data.filesize;
1450
1451                 /* (channel mask will get copied over from the source VORBIS_COMMENT if it exists) */
1452                 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))
1453                         return EncoderSession_finish_error(&encoder_session);
1454
1455                 /*
1456                  * have to wait until the FLAC encoder is set up for writing
1457                  * before any seeking in the input FLAC file, because the seek
1458                  * itself will usually call the decoder's write callback, and
1459                  * our decoder's write callback passes samples to our FLAC
1460                  * encoder
1461                  */
1462                 decoder_data.samples_left_to_process = encoder_session.total_samples_to_encode;
1463                 if(encoder_session.skip > 0) {
1464                         if(!FLAC__stream_decoder_seek_absolute(decoder, encoder_session.skip)) {
1465                                 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));
1466                                 goto fubar2; /*@@@ yuck */
1467                         }
1468                 }
1469
1470                 /*
1471                  * now do samples from the file
1472                  */
1473                 while(!decoder_data.fatal_error && decoder_data.samples_left_to_process > 0) {
1474                         if(!FLAC__stream_decoder_process_single(decoder)) {
1475                                 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));
1476                                 goto fubar2; /*@@@ yuck */
1477                         }
1478                 }
1479         }
1480
1481         FLAC__stream_decoder_delete(decoder);
1482         retval = EncoderSession_finish_ok(&encoder_session, -1, -1);
1483         /* have to wail until encoder is completely finished before deleting because of the final step of writing the seekpoint offsets */
1484         for(i = 0; i < decoder_data.num_metadata_blocks; i++)
1485                 free(decoder_data.metadata_blocks[i]);
1486         return retval;
1487
1488 fubar2:
1489         for(i = 0; i < decoder_data.num_metadata_blocks; i++)
1490                 free(decoder_data.metadata_blocks[i]);
1491 fubar1:
1492         FLAC__stream_decoder_delete(decoder);
1493         return EncoderSession_finish_error(&encoder_session);
1494 }
1495
1496 FLAC__bool EncoderSession_construct(EncoderSession *e, FLAC__bool use_ogg, FLAC__bool verify, FILE *infile, const char *infilename, const char *outfilename)
1497 {
1498         unsigned i;
1499         FLAC__uint32 test = 1;
1500
1501         /*
1502          * initialize globals
1503          */
1504
1505         is_big_endian_host_ = (*((FLAC__byte*)(&test)))? false : true;
1506
1507         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
1508                 input_[i] = &(in_[i][0]);
1509
1510
1511         /*
1512          * initialize instance
1513          */
1514
1515 #ifdef FLAC__HAS_OGG
1516         e->use_ogg = use_ogg;
1517 #else
1518         (void)use_ogg;
1519 #endif
1520         e->verify = verify;
1521
1522         e->is_stdout = (0 == strcmp(outfilename, "-"));
1523         e->outputfile_opened = false;
1524
1525         e->inbasefilename = grabbag__file_get_basename(infilename);
1526         e->outfilename = outfilename;
1527
1528         e->skip = 0; /* filled in later after the sample_rate is known */
1529         e->unencoded_size = 0;
1530         e->total_samples_to_encode = 0;
1531         e->bytes_written = 0;
1532         e->samples_written = 0;
1533         e->stats_mask = 0;
1534
1535         e->encoder = 0;
1536
1537         e->fin = infile;
1538         e->seek_table_template = 0;
1539
1540         if(0 == (e->seek_table_template = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE))) {
1541                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for seek table\n", e->inbasefilename);
1542                 return false;
1543         }
1544
1545         e->encoder = FLAC__stream_encoder_new();
1546         if(0 == e->encoder) {
1547                 flac__utils_printf(stderr, 1, "%s: ERROR creating the encoder instance\n", e->inbasefilename);
1548                 EncoderSession_destroy(e);
1549                 return false;
1550         }
1551
1552         return true;
1553 }
1554
1555 void EncoderSession_destroy(EncoderSession *e)
1556 {
1557         if(e->fin != stdin)
1558                 fclose(e->fin);
1559
1560         if(0 != e->encoder) {
1561                 FLAC__stream_encoder_delete(e->encoder);
1562                 e->encoder = 0;
1563         }
1564
1565         if(0 != e->seek_table_template) {
1566                 FLAC__metadata_object_delete(e->seek_table_template);
1567                 e->seek_table_template = 0;
1568         }
1569 }
1570
1571 int EncoderSession_finish_ok(EncoderSession *e, int info_align_carry, int info_align_zero)
1572 {
1573         FLAC__StreamEncoderState fse_state = FLAC__STREAM_ENCODER_OK;
1574         int ret = 0;
1575
1576         if(e->encoder) {
1577                 fse_state = FLAC__stream_encoder_get_state(e->encoder);
1578                 FLAC__stream_encoder_finish(e->encoder);
1579         }
1580
1581         if(e->total_samples_to_encode > 0) {
1582                 print_stats(e);
1583                 flac__utils_printf(stderr, 2, "\n");
1584         }
1585
1586         if(fse_state == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) {
1587                 print_verify_error(e);
1588                 ret = 1;
1589         }
1590         else {
1591                 if(info_align_carry >= 0) {
1592                         flac__utils_printf(stderr, 1, "%s: INFO: sector alignment causing %d samples to be carried over\n", e->inbasefilename, info_align_carry);
1593                 }
1594                 if(info_align_zero >= 0) {
1595                         flac__utils_printf(stderr, 1, "%s: INFO: sector alignment causing %d zero samples to be appended\n", e->inbasefilename, info_align_zero);
1596                 }
1597         }
1598
1599         EncoderSession_destroy(e);
1600
1601         return ret;
1602 }
1603
1604 int EncoderSession_finish_error(EncoderSession *e)
1605 {
1606         FLAC__ASSERT(e->encoder);
1607
1608         if(e->total_samples_to_encode > 0)
1609                 flac__utils_printf(stderr, 2, "\n");
1610
1611         if(FLAC__stream_encoder_get_state(e->encoder) == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
1612                 print_verify_error(e);
1613         else if(e->outputfile_opened)
1614                 /* only want to delete the file if we opened it; otherwise it could be an existing file and our overwrite failed */
1615                 unlink(e->outfilename);
1616
1617         EncoderSession_destroy(e);
1618
1619         return 1;
1620 }
1621
1622 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)
1623 {
1624         unsigned num_metadata, i;
1625         FLAC__StreamMetadata padding, *cuesheet = 0;
1626         FLAC__StreamMetadata *static_metadata[4+64]; /* MAGIC +64 is for pictures metadata in options.pictures */
1627         FLAC__StreamMetadata **metadata = static_metadata;
1628         FLAC__StreamEncoderInitStatus init_status;
1629         const FLAC__bool is_cdda = (channels == 1 || channels == 2) && (bps == 16) && (sample_rate == 44100);
1630         char apodizations[2000];
1631
1632         FLAC__ASSERT(sizeof(options.pictures)/sizeof(options.pictures[0]) <= 64);
1633
1634         e->replay_gain = options.replay_gain;
1635         e->channels = channels;
1636         e->bits_per_sample = bps;
1637         e->sample_rate = sample_rate;
1638
1639         apodizations[0] = '\0';
1640
1641         if(e->replay_gain) {
1642                 if(channels != 1 && channels != 2) {
1643                         flac__utils_printf(stderr, 1, "%s: ERROR, number of channels (%u) must be 1 or 2 for --replay-gain\n", e->inbasefilename, channels);
1644                         return false;
1645                 }
1646                 if(!grabbag__replaygain_is_valid_sample_frequency(sample_rate)) {
1647                         flac__utils_printf(stderr, 1, "%s: ERROR, invalid sample rate (%u) for --replay-gain\n", e->inbasefilename, sample_rate);
1648                         return false;
1649                 }
1650                 if(options.is_first_file) {
1651                         if(!grabbag__replaygain_init(sample_rate)) {
1652                                 flac__utils_printf(stderr, 1, "%s: ERROR initializing ReplayGain stage\n", e->inbasefilename);
1653                                 return false;
1654                         }
1655                 }
1656         }
1657
1658         if(!parse_cuesheet(&cuesheet, options.cuesheet_filename, e->inbasefilename, is_cdda, e->total_samples_to_encode))
1659                 return false;
1660
1661         if(!convert_to_seek_table_template(options.requested_seek_points, options.num_requested_seek_points, options.cued_seekpoints? cuesheet : 0, e)) {
1662                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for seek table\n", e->inbasefilename);
1663                 if(0 != cuesheet)
1664                         FLAC__metadata_object_delete(cuesheet);
1665                 return false;
1666         }
1667
1668         if(flac_decoder_data) {
1669                 /*
1670                  * we're encoding from FLAC so we will use the FLAC file's
1671                  * metadata as the basic for the encoded file
1672                  */
1673                 {
1674                         /*
1675                          * first handle padding: if --no-padding was specified,
1676                          * then delete all padding; else if -P was specified,
1677                          * use that instead of existing padding (if any); else
1678                          * if existing file has padding, move all existing
1679                          * padding blocks to one padding block at the end; else
1680                          * use default padding.
1681                          */
1682                         int p = -1;
1683                         size_t i, j;
1684                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1685                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_PADDING) {
1686                                         if(p < 0)
1687                                                 p = 0;
1688                                         p += flac_decoder_data->metadata_blocks[i]->length;
1689                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1690                                         flac_decoder_data->metadata_blocks[i] = 0;
1691                                 }
1692                                 else
1693                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1694                         }
1695                         flac_decoder_data->num_metadata_blocks = j;
1696                         if(options.padding > 0)
1697                                 p = options.padding;
1698                         if(p < 0)
1699                                 p = e->total_samples_to_encode / e->sample_rate < 20*60? FLAC_ENCODE__DEFAULT_PADDING : FLAC_ENCODE__DEFAULT_PADDING*8;
1700                         if(options.padding != 0) {
1701                                 if(p > 0 && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1702                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
1703                                         if(0 == flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]) {
1704                                                 flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for PADDING block\n", e->inbasefilename);
1705                                                 if(0 != cuesheet)
1706                                                         FLAC__metadata_object_delete(cuesheet);
1707                                                 return false;
1708                                         }
1709                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]->is_last = false; /* the encoder will set this for us */
1710                                         flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks]->length = p;
1711                                         flac_decoder_data->num_metadata_blocks++;
1712                                 }
1713                         }
1714                 }
1715                 {
1716                         /*
1717                          * next handle vorbis comment: if any tags were specified
1718                          * or there is no existing vorbis comment, we create a
1719                          * new vorbis comment (discarding any existing one); else
1720                          * we keep the existing one.  also need to make sure to
1721                          * propagate any channel mask tag.
1722                          */
1723                         size_t i, j;
1724                         FLAC__bool vc_found = false;
1725                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1726                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
1727                                         vc_found = true;
1728                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT && options.vorbis_comment->data.vorbis_comment.num_comments > 0) {
1729                                         (void) flac__utils_get_channel_mask_tag(flac_decoder_data->metadata_blocks[i], &channel_mask);
1730                                         flac__utils_printf(stderr, 1, "%s: WARNING, replacing tags from input FLAC file with those given on the command-line\n", e->inbasefilename);
1731                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1732                                         flac_decoder_data->metadata_blocks[i] = 0;
1733                                 }
1734                                 else
1735                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1736                         }
1737                         flac_decoder_data->num_metadata_blocks = j;
1738                         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])) {
1739                                 /* prepend ours */
1740                                 FLAC__StreamMetadata *vc = FLAC__metadata_object_clone(options.vorbis_comment);
1741                                 if(0 == vc || (channel_mask && !flac__utils_set_channel_mask_tag(vc, channel_mask))) {
1742                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for VORBIS_COMMENT block\n", e->inbasefilename);
1743                                         if(0 != cuesheet)
1744                                                 FLAC__metadata_object_delete(cuesheet);
1745                                         return false;
1746                                 }
1747                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1748                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1749                                 flac_decoder_data->metadata_blocks[1] = vc;
1750                                 flac_decoder_data->num_metadata_blocks++;
1751                         }
1752                 }
1753                 {
1754                         /*
1755                          * next handle cuesheet: if --cuesheet was specified, use
1756                          * it; else if file has existing CUESHEET and cuesheet's
1757                          * lead-out offset is correct, keep it; else no CUESHEET
1758                          */
1759                         size_t i, j;
1760                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1761                                 FLAC__bool existing_cuesheet_is_bad = false;
1762                                 /* check if existing cuesheet matches the input audio */
1763                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_CUESHEET && 0 == cuesheet) {
1764                                         const FLAC__StreamMetadata_CueSheet *cs = &flac_decoder_data->metadata_blocks[i]->data.cue_sheet;
1765                                         if(e->total_samples_to_encode == 0) {
1766                                                 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);
1767                                                 existing_cuesheet_is_bad = true;
1768                                         }
1769                                         else if(e->total_samples_to_encode != cs->tracks[cs->num_tracks-1].offset) {
1770                                                 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);
1771                                                 existing_cuesheet_is_bad = true;
1772                                         }
1773                                 }
1774                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_CUESHEET && (existing_cuesheet_is_bad || 0 != cuesheet)) {
1775                                         if(0 != cuesheet)
1776                                                 flac__utils_printf(stderr, 1, "%s: WARNING, replacing cuesheet in input FLAC file with the one given on the command-line\n", e->inbasefilename);
1777                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1778                                         flac_decoder_data->metadata_blocks[i] = 0;
1779                                 }
1780                                 else
1781                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1782                         }
1783                         flac_decoder_data->num_metadata_blocks = j;
1784                         if(0 != cuesheet && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
1785                                 /* prepend ours */
1786                                 FLAC__StreamMetadata *cs = FLAC__metadata_object_clone(cuesheet);
1787                                 if(0 == cs) {
1788                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for CUESHEET block\n", e->inbasefilename);
1789                                         if(0 != cuesheet)
1790                                                 FLAC__metadata_object_delete(cuesheet);
1791                                         return false;
1792                                 }
1793                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1794                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1795                                 flac_decoder_data->metadata_blocks[1] = cs;
1796                                 flac_decoder_data->num_metadata_blocks++;
1797                         }
1798                 }
1799                 {
1800                         /*
1801                          * finally handle seektable: if -S- was specified, no
1802                          * SEEKTABLE; else if -S was specified, use it/them;
1803                          * else if file has existing SEEKTABLE and input size is
1804                          * preserved (no --skip/--until/etc specified), keep it;
1805                          * else use default seektable options
1806                          *
1807                          * note: meanings of num_requested_seek_points:
1808                          *  -1 : no -S option given, default to some value
1809                          *   0 : -S- given (no seektable)
1810                          *  >0 : one or more -S options given
1811                          */
1812                         size_t i, j;
1813                         FLAC__bool existing_seektable = false;
1814                         for(i = 0, j = 0; i < flac_decoder_data->num_metadata_blocks; i++) {
1815                                 if(flac_decoder_data->metadata_blocks[i]->type == FLAC__METADATA_TYPE_SEEKTABLE)
1816                                         existing_seektable = true;
1817                                 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)) {
1818                                         if(options.num_requested_seek_points > 0)
1819                                                 flac__utils_printf(stderr, 1, "%s: WARNING, replacing seektable in input FLAC file with the one given on the command-line\n", e->inbasefilename);
1820                                         else if(options.num_requested_seek_points == 0)
1821                                                 ; /* no warning, silently delete existing SEEKTABLE since user specified --no-seektable (-S-) */
1822                                         else
1823                                                 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);
1824                                         FLAC__metadata_object_delete(flac_decoder_data->metadata_blocks[i]);
1825                                         flac_decoder_data->metadata_blocks[i] = 0;
1826                                         existing_seektable = false;
1827                                 }
1828                                 else
1829                                         flac_decoder_data->metadata_blocks[j++] = flac_decoder_data->metadata_blocks[i];
1830                         }
1831                         flac_decoder_data->num_metadata_blocks = j;
1832                         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])) {
1833                                 /* prepend ours */
1834                                 FLAC__StreamMetadata *st = FLAC__metadata_object_clone(e->seek_table_template);
1835                                 if(0 == st) {
1836                                         flac__utils_printf(stderr, 1, "%s: ERROR allocating memory for SEEKTABLE block\n", e->inbasefilename);
1837                                         if(0 != cuesheet)
1838                                                 FLAC__metadata_object_delete(cuesheet);
1839                                         return false;
1840                                 }
1841                                 for(i = flac_decoder_data->num_metadata_blocks; i > 1; i--)
1842                                         flac_decoder_data->metadata_blocks[i] = flac_decoder_data->metadata_blocks[i-1];
1843                                 flac_decoder_data->metadata_blocks[1] = st;
1844                                 flac_decoder_data->num_metadata_blocks++;
1845                         }
1846                 }
1847                 metadata = &flac_decoder_data->metadata_blocks[1]; /* don't include STREAMINFO */
1848                 num_metadata = flac_decoder_data->num_metadata_blocks - 1;
1849         }
1850         else {
1851                 /*
1852                  * we're not encoding from FLAC so we will build the metadata
1853                  * from scratch
1854                  */
1855                 num_metadata = 0;
1856                 if(e->seek_table_template->data.seek_table.num_points > 0) {
1857                         e->seek_table_template->is_last = false; /* the encoder will set this for us */
1858                         metadata[num_metadata++] = e->seek_table_template;
1859                 }
1860                 if(0 != cuesheet)
1861                         metadata[num_metadata++] = cuesheet;
1862                 if(channel_mask) {
1863                         if(!flac__utils_set_channel_mask_tag(options.vorbis_comment, channel_mask)) {
1864                                 flac__utils_printf(stderr, 1, "%s: ERROR adding channel mask tag\n", e->inbasefilename);
1865                                 if(0 != cuesheet)
1866                                         FLAC__metadata_object_delete(cuesheet);
1867                                 return false;
1868                         }
1869                 }
1870                 metadata[num_metadata++] = options.vorbis_comment;
1871                 for(i = 0; i < options.num_pictures; i++)
1872                         metadata[num_metadata++] = options.pictures[i];
1873                 if(options.padding != 0) {
1874                         padding.is_last = false; /* the encoder will set this for us */
1875                         padding.type = FLAC__METADATA_TYPE_PADDING;
1876                         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));
1877                         metadata[num_metadata++] = &padding;
1878                 }
1879         }
1880
1881         /* check for a few things that have not already been checked.  the
1882          * FLAC__stream_encoder_init*() will check it but only return
1883          * FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA so we check some
1884          * up front to give a better error message.
1885          */
1886         if(!verify_metadata(e, metadata, num_metadata)) {
1887                 if(0 != cuesheet)
1888                         FLAC__metadata_object_delete(cuesheet);
1889                 return false;
1890         }
1891
1892         FLAC__stream_encoder_set_verify(e->encoder, options.verify);
1893         FLAC__stream_encoder_set_streamable_subset(e->encoder, !options.lax);
1894         FLAC__stream_encoder_set_channels(e->encoder, channels);
1895         FLAC__stream_encoder_set_bits_per_sample(e->encoder, bps);
1896         FLAC__stream_encoder_set_sample_rate(e->encoder, sample_rate);
1897         for(i = 0; i < options.num_compression_settings; i++) {
1898                 switch(options.compression_settings[i].type) {
1899                         case CST_BLOCKSIZE:
1900                                 FLAC__stream_encoder_set_blocksize(e->encoder, options.compression_settings[i].value.t_unsigned);
1901                                 break;
1902                         case CST_COMPRESSION_LEVEL:
1903                                 FLAC__stream_encoder_set_compression_level(e->encoder, options.compression_settings[i].value.t_unsigned);
1904                                 apodizations[0] = '\0';
1905                                 break;
1906                         case CST_DO_MID_SIDE:
1907                                 FLAC__stream_encoder_set_do_mid_side_stereo(e->encoder, options.compression_settings[i].value.t_bool);
1908                                 break;
1909                         case CST_LOOSE_MID_SIDE:
1910                                 FLAC__stream_encoder_set_loose_mid_side_stereo(e->encoder, options.compression_settings[i].value.t_bool);
1911                                 break;
1912                         case CST_APODIZATION:
1913                                 if(strlen(apodizations)+strlen(options.compression_settings[i].value.t_string)+2 >= sizeof(apodizations)) {
1914                                         flac__utils_printf(stderr, 1, "%s: ERROR: too many apodization functions requested\n", e->inbasefilename);
1915                                         if(0 != cuesheet)
1916                                                 FLAC__metadata_object_delete(cuesheet);
1917                                         return false;
1918                                 }
1919                                 else {
1920                                         strcat(apodizations, options.compression_settings[i].value.t_string);
1921                                         strcat(apodizations, ";");
1922                                 }
1923                                 break;
1924                         case CST_MAX_LPC_ORDER:
1925                                 FLAC__stream_encoder_set_max_lpc_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1926                                 break;
1927                         case CST_QLP_COEFF_PRECISION:
1928                                 FLAC__stream_encoder_set_qlp_coeff_precision(e->encoder, options.compression_settings[i].value.t_unsigned);
1929                                 break;
1930                         case CST_DO_QLP_COEFF_PREC_SEARCH:
1931                                 FLAC__stream_encoder_set_do_qlp_coeff_prec_search(e->encoder, options.compression_settings[i].value.t_bool);
1932                                 break;
1933                         case CST_DO_ESCAPE_CODING:
1934                                 FLAC__stream_encoder_set_do_escape_coding(e->encoder, options.compression_settings[i].value.t_bool);
1935                                 break;
1936                         case CST_DO_EXHAUSTIVE_MODEL_SEARCH:
1937                                 FLAC__stream_encoder_set_do_exhaustive_model_search(e->encoder, options.compression_settings[i].value.t_bool);
1938                                 break;
1939                         case CST_MIN_RESIDUAL_PARTITION_ORDER:
1940                                 FLAC__stream_encoder_set_min_residual_partition_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1941                                 break;
1942                         case CST_MAX_RESIDUAL_PARTITION_ORDER:
1943                                 FLAC__stream_encoder_set_max_residual_partition_order(e->encoder, options.compression_settings[i].value.t_unsigned);
1944                                 break;
1945                         case CST_RICE_PARAMETER_SEARCH_DIST:
1946                                 FLAC__stream_encoder_set_rice_parameter_search_dist(e->encoder, options.compression_settings[i].value.t_unsigned);
1947                                 break;
1948                 }
1949         }
1950         if(*apodizations)
1951                 FLAC__stream_encoder_set_apodization(e->encoder, apodizations);
1952         FLAC__stream_encoder_set_total_samples_estimate(e->encoder, e->total_samples_to_encode);
1953         FLAC__stream_encoder_set_metadata(e->encoder, (num_metadata > 0)? metadata : 0, num_metadata);
1954
1955         FLAC__stream_encoder_disable_constant_subframes(e->encoder, options.debug.disable_constant_subframes);
1956         FLAC__stream_encoder_disable_fixed_subframes(e->encoder, options.debug.disable_fixed_subframes);
1957         FLAC__stream_encoder_disable_verbatim_subframes(e->encoder, options.debug.disable_verbatim_subframes);
1958
1959 #ifdef FLAC__HAS_OGG
1960         if(e->use_ogg) {
1961                 FLAC__stream_encoder_set_ogg_serial_number(e->encoder, options.serial_number);
1962
1963                 init_status = FLAC__stream_encoder_init_ogg_file(e->encoder, e->is_stdout? 0 : e->outfilename, encoder_progress_callback, /*client_data=*/e);
1964         }
1965         else
1966 #endif
1967         {
1968                 init_status = FLAC__stream_encoder_init_file(e->encoder, e->is_stdout? 0 : e->outfilename, encoder_progress_callback, /*client_data=*/e);
1969         }
1970
1971         if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
1972                 print_error_with_init_status(e, "ERROR initializing encoder", init_status);
1973                 if(FLAC__stream_encoder_get_state(e->encoder) != FLAC__STREAM_ENCODER_IO_ERROR)
1974                         e->outputfile_opened = true;
1975                 if(0 != cuesheet)
1976                         FLAC__metadata_object_delete(cuesheet);
1977                 return false;
1978         }
1979         else
1980                 e->outputfile_opened = true;
1981
1982         e->stats_mask = (FLAC__stream_encoder_get_do_exhaustive_model_search(e->encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(e->encoder))? 0x0f : 0x3f;
1983
1984         if(0 != cuesheet)
1985                 FLAC__metadata_object_delete(cuesheet);
1986
1987         return true;
1988 }
1989
1990 FLAC__bool EncoderSession_process(EncoderSession *e, const FLAC__int32 * const buffer[], unsigned samples)
1991 {
1992         if(e->replay_gain) {
1993                 if(!grabbag__replaygain_analyze(buffer, e->channels==2, e->bits_per_sample, samples)) {
1994                         flac__utils_printf(stderr, 1, "%s: WARNING, error while calculating ReplayGain\n", e->inbasefilename);
1995                 }
1996         }
1997
1998         return FLAC__stream_encoder_process(e->encoder, buffer, samples);
1999 }
2000
2001 FLAC__bool convert_to_seek_table_template(const char *requested_seek_points, int num_requested_seek_points, FLAC__StreamMetadata *cuesheet, EncoderSession *e)
2002 {
2003         const FLAC__bool only_placeholders = e->is_stdout;
2004         FLAC__bool has_real_points;
2005
2006         if(num_requested_seek_points == 0 && 0 == cuesheet)
2007                 return true;
2008
2009         if(num_requested_seek_points < 0) {
2010                 requested_seek_points = "10s;";
2011                 num_requested_seek_points = 1;
2012         }
2013
2014         if(num_requested_seek_points > 0) {
2015                 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))
2016                         return false;
2017         }
2018
2019         if(0 != cuesheet) {
2020                 unsigned i, j;
2021                 const FLAC__StreamMetadata_CueSheet *cs = &cuesheet->data.cue_sheet;
2022                 for(i = 0; i < cs->num_tracks; i++) {
2023                         const FLAC__StreamMetadata_CueSheet_Track *tr = cs->tracks+i;
2024                         for(j = 0; j < tr->num_indices; j++) {
2025                                 if(!FLAC__metadata_object_seektable_template_append_point(e->seek_table_template, tr->offset + tr->indices[j].offset))
2026                                         return false;
2027                                 has_real_points = true;
2028                         }
2029                 }
2030                 if(has_real_points)
2031                         if(!FLAC__metadata_object_seektable_template_sort(e->seek_table_template, /*compact=*/true))
2032                                 return false;
2033         }
2034
2035         if(has_real_points) {
2036                 if(e->is_stdout) {
2037                         flac__utils_printf(stderr, 1, "%s: WARNING, cannot write back seekpoints when encoding to stdout\n", e->inbasefilename);
2038                 }
2039         }
2040
2041         return true;
2042 }
2043
2044 FLAC__bool canonicalize_until_specification(utils__SkipUntilSpecification *spec, const char *inbasefilename, unsigned sample_rate, FLAC__uint64 skip, FLAC__uint64 total_samples_in_input)
2045 {
2046         /* convert from mm:ss.sss to sample number if necessary */
2047         flac__utils_canonicalize_skip_until_specification(spec, sample_rate);
2048
2049         /* special case: if "--until=-0", use the special value '0' to mean "end-of-stream" */
2050         if(spec->is_relative && spec->value.samples == 0) {
2051                 spec->is_relative = false;
2052                 return true;
2053         }
2054
2055         /* in any other case the total samples in the input must be known */
2056         if(total_samples_in_input == 0) {
2057                 flac__utils_printf(stderr, 1, "%s: ERROR, cannot use --until when input length is unknown\n", inbasefilename);
2058                 return false;
2059         }
2060
2061         FLAC__ASSERT(spec->value_is_samples);
2062
2063         /* convert relative specifications to absolute */
2064         if(spec->is_relative) {
2065                 if(spec->value.samples <= 0)
2066                         spec->value.samples += (FLAC__int64)total_samples_in_input;
2067                 else
2068                         spec->value.samples += skip;
2069                 spec->is_relative = false;
2070         }
2071
2072         /* error check */
2073         if(spec->value.samples < 0) {
2074                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before beginning of input\n", inbasefilename);
2075                 return false;
2076         }
2077         if((FLAC__uint64)spec->value.samples <= skip) {
2078                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is before --skip point\n", inbasefilename);
2079                 return false;
2080         }
2081         if((FLAC__uint64)spec->value.samples > total_samples_in_input) {
2082                 flac__utils_printf(stderr, 1, "%s: ERROR, --until value is after end of input\n", inbasefilename);
2083                 return false;
2084         }
2085
2086         return true;
2087 }
2088
2089 FLAC__bool verify_metadata(const EncoderSession *e, FLAC__StreamMetadata **metadata, unsigned num_metadata)
2090 {
2091         FLAC__bool metadata_picture_has_type1 = false;
2092         FLAC__bool metadata_picture_has_type2 = false;
2093         unsigned i;
2094
2095         FLAC__ASSERT(0 != metadata);
2096         for(i = 0; i < num_metadata; i++) {
2097                 const FLAC__StreamMetadata *m = metadata[i];
2098                 if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
2099                         if(!FLAC__format_seektable_is_legal(&m->data.seek_table)) {
2100                                 flac__utils_printf(stderr, 1, "%s: ERROR: SEEKTABLE metadata block is invalid\n", e->inbasefilename);
2101                                 return false;
2102                         }
2103                 }
2104                 else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
2105                         if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0)) {
2106                                 flac__utils_printf(stderr, 1, "%s: ERROR: CUESHEET metadata block is invalid\n", e->inbasefilename);
2107                                 return false;
2108                         }
2109                 }
2110                 else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
2111                         const char *error = 0;
2112                         if(!FLAC__format_picture_is_legal(&m->data.picture, &error)) {
2113                                 flac__utils_printf(stderr, 1, "%s: ERROR: PICTURE metadata block is invalid: %s\n", e->inbasefilename, error);
2114                                 return false;
2115                         }
2116                         if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
2117                                 if(metadata_picture_has_type1) {
2118                                         flac__utils_printf(stderr, 1, "%s: ERROR: there may only be one picture of type 1 (32x32 icon) in the file\n", e->inbasefilename);
2119                                         return false;
2120                                 }
2121                                 metadata_picture_has_type1 = true;
2122                         }
2123                         else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
2124                                 if(metadata_picture_has_type2) {
2125                                         flac__utils_printf(stderr, 1, "%s: ERROR: there may only be one picture of type 2 (icon) in the file\n", e->inbasefilename);
2126                                         return false;
2127                                 }
2128                                 metadata_picture_has_type2 = true;
2129                         }
2130                 }
2131         }
2132
2133         return true;
2134 }
2135
2136 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)
2137 {
2138         unsigned wide_sample, sample, channel, byte;
2139         FLAC__int32 *out[FLAC__MAX_CHANNELS];
2140
2141         if(0 == channel_map) {
2142                 for(channel = 0; channel < channels; channel++)
2143                         out[channel] = dest[channel];
2144         }
2145         else {
2146                 for(channel = 0; channel < channels; channel++)
2147                         out[channel] = dest[channel_map[channel]];
2148         }
2149
2150         if(bps == 8) {
2151                 if(is_unsigned_samples) {
2152                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2153                                 for(channel = 0; channel < channels; channel++, sample++)
2154                                         out[channel][wide_sample] = (FLAC__int32)ucbuffer_[sample] - 0x80;
2155                 }
2156                 else {
2157                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2158                                 for(channel = 0; channel < channels; channel++, sample++)
2159                                         out[channel][wide_sample] = (FLAC__int32)scbuffer_[sample];
2160                 }
2161         }
2162         else if(bps == 16) {
2163                 if(is_big_endian != is_big_endian_host_) {
2164                         unsigned char tmp;
2165                         const unsigned bytes = wide_samples * channels * (bps >> 3);
2166                         for(byte = 0; byte < bytes; byte += 2) {
2167                                 tmp = ucbuffer_[byte];
2168                                 ucbuffer_[byte] = ucbuffer_[byte+1];
2169                                 ucbuffer_[byte+1] = tmp;
2170                         }
2171                 }
2172                 if(is_unsigned_samples) {
2173                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2174                                 for(channel = 0; channel < channels; channel++, sample++)
2175                                         out[channel][wide_sample] = (FLAC__int32)usbuffer_[sample] - 0x8000;
2176                 }
2177                 else {
2178                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2179                                 for(channel = 0; channel < channels; channel++, sample++)
2180                                         out[channel][wide_sample] = (FLAC__int32)ssbuffer_[sample];
2181                 }
2182         }
2183         else if(bps == 24) {
2184                 if(!is_big_endian) {
2185                         unsigned char tmp;
2186                         const unsigned bytes = wide_samples * channels * (bps >> 3);
2187                         for(byte = 0; byte < bytes; byte += 3) {
2188                                 tmp = ucbuffer_[byte];
2189                                 ucbuffer_[byte] = ucbuffer_[byte+2];
2190                                 ucbuffer_[byte+2] = tmp;
2191                         }
2192                 }
2193                 if(is_unsigned_samples) {
2194                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2195                                 for(channel = 0; channel < channels; channel++, sample++) {
2196                                         out[channel][wide_sample]  = ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2197                                         out[channel][wide_sample] |= ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2198                                         out[channel][wide_sample] |= ucbuffer_[byte++];
2199                                         out[channel][wide_sample] -= 0x800000;
2200                                 }
2201                 }
2202                 else {
2203                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2204                                 for(channel = 0; channel < channels; channel++, sample++) {
2205                                         out[channel][wide_sample]  = scbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2206                                         out[channel][wide_sample] |= ucbuffer_[byte++]; out[channel][wide_sample] <<= 8;
2207                                         out[channel][wide_sample] |= ucbuffer_[byte++];
2208                                 }
2209                 }
2210         }
2211         else {
2212                 FLAC__ASSERT(0);
2213         }
2214         if(shift > 0) {
2215                 FLAC__int32 mask = (1<<shift)-1;
2216                 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++)
2217                         for(channel = 0; channel < channels; channel++) {
2218                                 if(out[channel][wide_sample] & mask) {
2219                                         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);
2220                                         return false;
2221                                 }
2222                                 out[channel][wide_sample] >>= shift;
2223                         }
2224         }
2225         return true;
2226 }
2227
2228 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)
2229 {
2230         EncoderSession *encoder_session = (EncoderSession*)client_data;
2231
2232         (void)encoder, (void)total_frames_estimate;
2233
2234         encoder_session->bytes_written = bytes_written;
2235         encoder_session->samples_written = samples_written;
2236
2237         if(encoder_session->total_samples_to_encode > 0 && !((frames_written-1) & encoder_session->stats_mask))
2238                 print_stats(encoder_session);
2239 }
2240
2241 FLAC__StreamDecoderReadStatus flac_decoder_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
2242 {
2243         size_t n = 0;
2244         FLACDecoderData *data = (FLACDecoderData*)client_data;
2245         (void)decoder;
2246
2247         if (data->fatal_error)
2248                 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2249
2250         /* use up lookahead first */
2251         if (data->lookahead_length) {
2252                 n = min(data->lookahead_length, *bytes);
2253                 memcpy(buffer, data->lookahead, n);
2254                 buffer += n;
2255                 data->lookahead += n;
2256                 data->lookahead_length -= n;
2257         }
2258
2259         /* get the rest from file */
2260         if (*bytes > n) {
2261                 *bytes = n + fread(buffer, 1, *bytes-n, data->encoder_session->fin);
2262                 return ferror(data->encoder_session->fin)? FLAC__STREAM_DECODER_READ_STATUS_ABORT : FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2263         }
2264         else
2265                 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2266 }
2267
2268 FLAC__StreamDecoderSeekStatus flac_decoder_seek_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
2269 {
2270         FLACDecoderData *data = (FLACDecoderData*)client_data;
2271         (void)decoder;
2272
2273         if(fseeko(data->encoder_session->fin, (off_t)absolute_byte_offset, SEEK_SET) < 0)
2274                 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
2275         else
2276                 return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
2277 }
2278
2279 FLAC__StreamDecoderTellStatus flac_decoder_tell_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
2280 {
2281         FLACDecoderData *data = (FLACDecoderData*)client_data;
2282         off_t pos;
2283         (void)decoder;
2284
2285         if((pos = ftello(data->encoder_session->fin)) < 0)
2286                 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
2287         else {
2288                 *absolute_byte_offset = (FLAC__uint64)pos;
2289                 return FLAC__STREAM_DECODER_TELL_STATUS_OK;
2290         }
2291 }
2292
2293 FLAC__StreamDecoderLengthStatus flac_decoder_length_callback(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
2294 {
2295         FLACDecoderData *data = (FLACDecoderData*)client_data;
2296         (void)decoder;
2297
2298         if(0 == data->filesize)
2299                 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
2300         else {
2301                 *stream_length = (FLAC__uint64)data->filesize;
2302                 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
2303         }
2304 }
2305
2306 FLAC__bool flac_decoder_eof_callback(const FLAC__StreamDecoder *decoder, void *client_data)
2307 {
2308         FLACDecoderData *data = (FLACDecoderData*)client_data;
2309         (void)decoder;
2310
2311         return feof(data->encoder_session->fin)? true : false;
2312 }
2313
2314 FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
2315 {
2316         FLACDecoderData *data = (FLACDecoderData*)client_data;
2317         FLAC__uint64 n = min(data->samples_left_to_process, frame->header.blocksize);
2318         (void)decoder;
2319
2320         if(!EncoderSession_process(data->encoder_session, buffer, (unsigned)n)) {
2321                 print_error_with_state(data->encoder_session, "ERROR during encoding");
2322                 data->fatal_error = true;
2323                 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
2324         }
2325
2326         data->samples_left_to_process -= n;
2327         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
2328 }
2329
2330 void flac_decoder_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
2331 {
2332         FLACDecoderData *data = (FLACDecoderData*)client_data;
2333         (void)decoder;
2334
2335         if (data->fatal_error)
2336                 return;
2337
2338         if (
2339                 data->num_metadata_blocks == sizeof(data->metadata_blocks)/sizeof(data->metadata_blocks[0]) ||
2340                 0 == (data->metadata_blocks[data->num_metadata_blocks] = FLAC__metadata_object_clone(metadata))
2341         )
2342                 data->fatal_error = true;
2343         else
2344                 data->num_metadata_blocks++;
2345 }
2346
2347 void flac_decoder_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
2348 {
2349         FLACDecoderData *data = (FLACDecoderData*)client_data;
2350         (void)decoder;
2351
2352         flac__utils_printf(stderr, 1, "%s: ERROR got %s while decoding FLAC input\n", data->encoder_session->inbasefilename, FLAC__StreamDecoderErrorStatusString[status]);
2353         data->fatal_error = true;
2354 }
2355
2356 FLAC__bool parse_cuesheet(FLAC__StreamMetadata **cuesheet, const char *cuesheet_filename, const char *inbasefilename, FLAC__bool is_cdda, FLAC__uint64 lead_out_offset)
2357 {
2358         FILE *f;
2359         unsigned last_line_read;
2360         const char *error_message;
2361
2362         if(0 == cuesheet_filename)
2363                 return true;
2364
2365         if(lead_out_offset == 0) {
2366                 flac__utils_printf(stderr, 1, "%s: ERROR cannot import cuesheet when the number of input samples to encode is unknown\n", inbasefilename);
2367                 return false;
2368         }
2369
2370         if(0 == (f = fopen(cuesheet_filename, "r"))) {
2371                 flac__utils_printf(stderr, 1, "%s: ERROR opening cuesheet \"%s\" for reading: %s\n", inbasefilename, cuesheet_filename, strerror(errno));
2372                 return false;
2373         }
2374
2375         *cuesheet = grabbag__cuesheet_parse(f, &error_message, &last_line_read, is_cdda, lead_out_offset);
2376
2377         fclose(f);
2378
2379         if(0 == *cuesheet) {
2380                 flac__utils_printf(stderr, 1, "%s: ERROR parsing cuesheet \"%s\" on line %u: %s\n", inbasefilename, cuesheet_filename, last_line_read, error_message);
2381                 return false;
2382         }
2383
2384         if(!FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/false, &error_message)) {
2385                 flac__utils_printf(stderr, 1, "%s: ERROR parsing cuesheet \"%s\": %s\n", inbasefilename, cuesheet_filename, error_message);
2386                 return false;
2387         }
2388
2389         /* if we're expecting CDDA, warn about non-compliance */
2390         if(is_cdda && !FLAC__format_cuesheet_is_legal(&(*cuesheet)->data.cue_sheet, /*check_cd_da_subset=*/true, &error_message)) {
2391                 flac__utils_printf(stderr, 1, "%s: WARNING cuesheet \"%s\" is not audio CD compliant: %s\n", inbasefilename, cuesheet_filename, error_message);
2392                 (*cuesheet)->data.cue_sheet.is_cd = false;
2393         }
2394
2395         return true;
2396 }
2397
2398 void print_stats(const EncoderSession *encoder_session)
2399 {
2400         const FLAC__uint64 samples_written = min(encoder_session->total_samples_to_encode, encoder_session->samples_written);
2401 #if defined _MSC_VER || defined __MINGW32__
2402         /* with MSVC you have to spoon feed it the casting */
2403         const double progress = (double)(FLAC__int64)samples_written / (double)(FLAC__int64)encoder_session->total_samples_to_encode;
2404         const double ratio = (double)(FLAC__int64)encoder_session->bytes_written / ((double)(FLAC__int64)encoder_session->unencoded_size * min(1.0, progress));
2405 #else
2406         const double progress = (double)samples_written / (double)encoder_session->total_samples_to_encode;
2407         const double ratio = (double)encoder_session->bytes_written / ((double)encoder_session->unencoded_size * min(1.0, progress));
2408 #endif
2409
2410         if(samples_written == encoder_session->total_samples_to_encode) {
2411                 flac__utils_printf(stderr, 2, "\r%s:%s wrote %u bytes, ratio=%0.3f",
2412                         encoder_session->inbasefilename,
2413                         encoder_session->verify? " Verify OK," : "",
2414                         (unsigned)encoder_session->bytes_written,
2415                         ratio
2416                 );
2417         }
2418         else {
2419                 flac__utils_printf(stderr, 2, "\r%s: %u%% complete, ratio=%0.3f", encoder_session->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
2420         }
2421 }
2422
2423 void print_error_with_init_status(const EncoderSession *e, const char *message, FLAC__StreamEncoderInitStatus init_status)
2424 {
2425         const int ilen = strlen(e->inbasefilename) + 1;
2426         const char *state_string = "";
2427
2428         flac__utils_printf(stderr, 1, "\n%s: %s\n", e->inbasefilename, message);
2429
2430         flac__utils_printf(stderr, 1, "%*s init_status = %s\n", ilen, "", FLAC__StreamEncoderInitStatusString[init_status]);
2431
2432         if(init_status == FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR) {
2433                 state_string = FLAC__stream_encoder_get_resolved_state_string(e->encoder);
2434
2435                 flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", state_string);
2436
2437                 /* print out some more info for some errors: */
2438                 if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_CLIENT_ERROR])) {
2439                         flac__utils_printf(stderr, 1,
2440                                 "\n"
2441                                 "An error occurred while writing; the most common cause is that the disk is full.\n"
2442                         );
2443                 }
2444                 else if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_IO_ERROR])) {
2445                         flac__utils_printf(stderr, 1,
2446                                 "\n"
2447                                 "An error occurred opening the output file; it is likely that the output\n"
2448                                 "directory does not exist or is not writable, the output file already exists and\n"
2449                                 "is not writable, or the disk is full.\n"
2450                         );
2451                 }
2452         }
2453         else if(init_status == FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE) {
2454                 flac__utils_printf(stderr, 1,
2455                         "\n"
2456                         "The encoding parameters specified do not conform to the FLAC Subset and may not\n"
2457                         "be streamable or playable in hardware devices.  If you really understand the\n"
2458                         "consequences, you can add --lax to the command-line options to encode with\n"
2459                         "these parameters anyway.  See http://flac.sourceforge.net/format.html#subset\n"
2460                 );
2461         }
2462 }
2463
2464 void print_error_with_state(const EncoderSession *e, const char *message)
2465 {
2466         const int ilen = strlen(e->inbasefilename) + 1;
2467         const char *state_string;
2468
2469         flac__utils_printf(stderr, 1, "\n%s: %s\n", e->inbasefilename, message);
2470
2471         state_string = FLAC__stream_encoder_get_resolved_state_string(e->encoder);
2472
2473         flac__utils_printf(stderr, 1, "%*s state = %s\n", ilen, "", state_string);
2474
2475         /* print out some more info for some errors: */
2476         if(0 == strcmp(state_string, FLAC__StreamEncoderStateString[FLAC__STREAM_ENCODER_CLIENT_ERROR])) {
2477                 flac__utils_printf(stderr, 1,
2478                         "\n"
2479                         "An error occurred while writing; the most common cause is that the disk is full.\n"
2480                 );
2481         }
2482 }
2483
2484 void print_verify_error(EncoderSession *e)
2485 {
2486         FLAC__uint64 absolute_sample;
2487         unsigned frame_number;
2488         unsigned channel;
2489         unsigned sample;
2490         FLAC__int32 expected;
2491         FLAC__int32 got;
2492
2493         FLAC__stream_encoder_get_verify_decoder_error_stats(e->encoder, &absolute_sample, &frame_number, &channel, &sample, &expected, &got);
2494
2495         flac__utils_printf(stderr, 1, "%s: ERROR: mismatch in decoded data, verify FAILED!\n", e->inbasefilename);
2496         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);
2497         flac__utils_printf(stderr, 1, "       In all known cases, verify errors are caused by hardware problems,\n");
2498         flac__utils_printf(stderr, 1, "       usually overclocking or bad RAM.  Delete %s\n", e->outfilename);
2499         flac__utils_printf(stderr, 1, "       and repeat the flac command exactly as before.  If it does not give a\n");
2500         flac__utils_printf(stderr, 1, "       verify error in the exact same place each time you try it, then there is\n");
2501         flac__utils_printf(stderr, 1, "       a problem with your hardware; please see the FAQ:\n");
2502         flac__utils_printf(stderr, 1, "           http://flac.sourceforge.net/faq.html#tools__hardware_prob\n");
2503         flac__utils_printf(stderr, 1, "       If it does fail in the exact same place every time, keep\n");
2504         flac__utils_printf(stderr, 1, "       %s and submit a bug report to:\n", e->outfilename);
2505         flac__utils_printf(stderr, 1, "           https://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
2506         flac__utils_printf(stderr, 1, "       Make sure to upload the FLAC file and use the \"Monitor\" feature to\n");
2507         flac__utils_printf(stderr, 1, "       monitor the bug status.\n");
2508         flac__utils_printf(stderr, 1, "Verify FAILED!  Do not trust %s\n", e->outfilename);
2509 }
2510
2511 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
2512 {
2513         size_t bytes_read = fread(val, 1, 2, f);
2514
2515         if(bytes_read == 0) {
2516                 if(!eof_ok) {
2517                         flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2518                         return false;
2519                 }
2520                 else
2521                         return true;
2522         }
2523         else if(bytes_read < 2) {
2524                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2525                 return false;
2526         }
2527         else {
2528                 if(is_big_endian_host_) {
2529                         FLAC__byte tmp, *b = (FLAC__byte*)val;
2530                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
2531                 }
2532                 return true;
2533         }
2534 }
2535
2536 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2537 {
2538         size_t bytes_read = fread(val, 1, 4, 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 < 4) {
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[3]; b[3] = b[0]; b[0] = tmp;
2556                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
2557                 }
2558                 return true;
2559         }
2560 }
2561
2562 FLAC__bool read_big_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
2563 {
2564         unsigned char buf[4];
2565         size_t bytes_read= fread(buf, 1, 2, f);
2566
2567         if(bytes_read==0U && eof_ok)
2568                 return true;
2569         else if(bytes_read<2U) {
2570                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2571                 return false;
2572         }
2573
2574         /* this is independent of host endianness */
2575         *val= (FLAC__uint16)(buf[0])<<8 | buf[1];
2576
2577         return true;
2578 }
2579
2580 FLAC__bool read_big_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2581 {
2582         unsigned char buf[4];
2583         size_t bytes_read= fread(buf, 1, 4, f);
2584
2585         if(bytes_read==0U && eof_ok)
2586                 return true;
2587         else if(bytes_read<4U) {
2588                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2589                 return false;
2590         }
2591
2592         /* this is independent of host endianness */
2593         *val= (FLAC__uint32)(buf[0])<<24 | (FLAC__uint32)(buf[1])<<16 |
2594                 (FLAC__uint32)(buf[2])<<8 | buf[3];
2595
2596         return true;
2597 }
2598
2599 FLAC__bool read_sane_extended(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
2600         /* Read an IEEE 754 80-bit (aka SANE) extended floating point value from 'f',
2601          * convert it into an integral value and store in 'val'.  Return false if only
2602          * between 1 and 9 bytes remain in 'f', if 0 bytes remain in 'f' and 'eof_ok' is
2603          * false, or if the value is negative, between zero and one, or too large to be
2604          * represented by 'val'; return true otherwise.
2605          */
2606 {
2607         unsigned int i;
2608         unsigned char buf[10];
2609         size_t bytes_read= fread(buf, 1U, 10U, f);
2610         FLAC__int16 e= ((FLAC__uint16)(buf[0])<<8 | (FLAC__uint16)(buf[1]))-0x3FFF;
2611         FLAC__int16 shift= 63-e;
2612         FLAC__uint64 p= 0U;
2613
2614         if(bytes_read==0U && eof_ok)
2615                 return true;
2616         else if(bytes_read<10U) {
2617                 flac__utils_printf(stderr, 1, "%s: ERROR: unexpected EOF\n", fn);
2618                 return false;
2619         }
2620         else if((buf[0]>>7)==1U || e<0 || e>63) {
2621                 flac__utils_printf(stderr, 1, "%s: ERROR: invalid floating-point value\n", fn);
2622                 return false;
2623         }
2624
2625         for(i= 0U; i<8U; ++i)
2626                 p|= (FLAC__uint64)(buf[i+2])<<(56U-i*8);
2627         *val= (FLAC__uint32)((p>>shift)+(p>>(shift-1) & 0x1));
2628
2629         return true;
2630 }
2631
2632 FLAC__bool fskip_ahead(FILE *f, FLAC__uint64 offset)
2633 {
2634         static unsigned char dump[8192];
2635
2636         while(offset > 0) {
2637                 long need = (long)min(offset, LONG_MAX);
2638                 if(fseeko(f, need, SEEK_CUR) < 0) {
2639                         need = (long)min(offset, sizeof(dump));
2640                         if((long)fread(dump, 1, need, f) < need)
2641                                 return false;
2642                 }
2643                 offset -= need;
2644         }
2645 #if 0 /* pure non-fseek() version */
2646         while(offset > 0) {
2647                 const long need = (long)min(offset, sizeof(dump));
2648                 if(fread(dump, 1, need, f) < need)
2649                         return false;
2650                 offset -= need;
2651         }
2652 #endif
2653         return true;
2654 }
2655
2656 unsigned count_channel_mask_bits(FLAC__uint32 mask)
2657 {
2658         unsigned count = 0;
2659         while(mask) {
2660                 if(mask & 1)
2661                         count++;
2662                 mask >>= 1;
2663         }
2664         return count;
2665 }
2666
2667 FLAC__uint32 limit_channel_mask(FLAC__uint32 mask, unsigned channels)
2668 {
2669         FLAC__uint32 x = 0x80000000;
2670         unsigned count = count_channel_mask_bits(mask);
2671         while(x && count > channels) {
2672                 if(mask & x) {
2673                         mask &= ~x;
2674                         count--;
2675                 }
2676                 x >>= 1;
2677         }
2678         FLAC__ASSERT(count_channel_mask_bits(mask) == channels);
2679         return mask;
2680 }