src/main.c

   1 /*
   2  * Copyright (C) 2013 nu774
   3  * For conditions of distribution and use, see copyright notice in COPYING
   4  */
   5 #if HAVE_CONFIG_H
   6 #  include "config.h"
   7 #endif
   8 #if HAVE_STDINT_H
   9 #  include <stdint.h>
  10 #endif
  11 #if HAVE_INTTYPES_H
  12 #  include <inttypes.h>
  13 #elif defined(_MSC_VER)
  14 #  define SCNd64 "I64d"
  15 #endif
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19 #include <ctype.h>
  20 #include <locale.h>
  21 #include <errno.h>
  22 #include <sys/stat.h>
  23 #include <getopt.h>
  24 #if HAVE_UNISTD_H
  25 #include <unistd.h>
  26 #endif
  27 #if HAVE_SIGACTION
  28 #include <signal.h>
  29 #endif
  30 #ifdef _WIN32
  31 #include <io.h>
  32 #define WIN32_LEAN_AND_MEAN
  33 #include <windows.h>
  34 #endif
  35 #include "compat.h"
  36 #include "wav_reader.h"
  37 #include "aacenc.h"
  38 #include "m4af.h"
  39 #include "progress.h"
  40 #include "version.h"
  41 #include "metadata.h"
  42
  43 #define PROGNAME "fdkaac"
  44
  45 static volatile int g_interrupted = 0;
  46
  47 #if HAVE_SIGACTION
  48 static void signal_handler(int signum)
  49 {
  50     g_interrupted = 1;
  51 }
  52 static void handle_signals(void)
  53 {
  54     int i, sigs[] = { SIGINT, SIGHUP, SIGTERM };
  55     for (i = 0; i < sizeof(sigs)/sizeof(sigs[0]); ++i) {
  56         struct sigaction sa = { 0 };
  57         sa.sa_handler = signal_handler;
  58         sa.sa_flags |= SA_RESTART;
  59         sigaction(sigs[i], &sa, 0);
  60     }
  61 }
  62 #elif defined(_WIN32)
  63 static BOOL WINAPI signal_handler(DWORD type)
  64 {
  65     g_interrupted = 1;
  66     return TRUE;
  67 }
  68
  69 static void handle_signals(void)
  70 {
  71     SetConsoleCtrlHandler(signal_handler, TRUE);
  72 }
  73 #else
  74 static void handle_signals(void)
  75 {
  76 }
  77 #endif
  78
  79 static
  80 int read_callback(void *cookie, void *data, uint32_t size)
  81 {
  82     size_t rc = fread(data, 1, size, (FILE*)cookie);
  83     return ferror((FILE*)cookie) ? -1 : (int)rc;
  84 }
  85
  86 static
  87 int write_callback(void *cookie, const void *data, uint32_t size)
  88 {
  89     size_t rc = fwrite(data, 1, size, (FILE*)cookie);
  90     return ferror((FILE*)cookie) ? -1 : (int)rc;
  91 }
  92
  93 static
  94 int seek_callback(void *cookie, int64_t off, int whence)
  95 {
  96     return fseeko((FILE*)cookie, off, whence);
  97 }
  98
  99 static
 100 int64_t tell_callback(void *cookie)
 101 {
 102     return ftello((FILE*)cookie);
 103 }
 104
 105 static
 106 void usage(void)
 107 {
 108     printf(
 109 PROGNAME " %s\n"
 110 "Usage: " PROGNAME " [options] input_file\n"
 111 "Options:\n"
 112 " -h, --help                    Print this help message\n"
 113 " -p, --profile <n>             Profile (audio object type)\n"
 114 "                                 2: MPEG-4 AAC LC (default)\n"
 115 "                                 5: MPEG-4 HE-AAC (SBR)\n"
 116 "                                29: MPEG-4 HE-AAC v2 (SBR+PS)\n"
 117 "                                23: MPEG-4 AAC LD\n"
 118 "                                39: MPEG-4 AAC ELD\n"
 119 "                               129: MPEG-2 AAC LC\n"
 120 "                               132: MPEG-2 HE-AAC (SBR)\n"
 121 "                               156: MPEG-2 HE-AAC v2 (SBR+PS)\n"
 122 " -b, --bitrate <n>             Bitrate in bits per seconds (for CBR)\n"
 123 " -m, --bitrate-mode <n>        Bitrate configuration\n"
 124 "                                 0: CBR (default)\n"
 125 "                                 1-5: VBR\n"
 126 "                               (VBR mode is not officially supported, and\n"
 127 "                                works only on a certain combination of\n"
 128 "                                parameter settings, sample rate, and\n"
 129 "                                channel configuration)\n"
 130 " -w, --bandwidth <n>           Frequency bandwidth in Hz (AAC LC only)\n"
 131 " -a, --afterburner <n>         Afterburner\n"
 132 "                                 0: Off\n"
 133 "                                 1: On(default)\n"
 134 " -L, --lowdelay-sbr            Enable ELD-SBR (AAC ELD only)\n"
 135 " -s, --sbr-signaling <n>       SBR signaling mode\n"
 136 "                                 0: Implicit, backward compatible(default)\n"
 137 "                                 1: Explicit SBR and implicit PS\n"
 138 "                                 2: Explicit hierarchical signaling\n"
 139 " -f, --transport-format <n>    Transport format\n"
 140 "                                 0: RAW (default, muxed into M4A)\n"
 141 "                                 1: ADIF\n"
 142 "                                 2: ADTS\n"
 143 "                                 6: LATM MCP=1\n"
 144 "                                 7: LATM MCP=0\n"
 145 "                                10: LOAS/LATM (LATM within LOAS)\n"
 146 " -C, --adts-crc-check          Add CRC protection on ADTS header\n"
 147 " -h, --header-period <n>       StreamMuxConfig/PCE repetition period in\n"
 148 "                               transport layer\n"
 149 "\n"
 150 " -o <filename>                 Output filename\n"
 151 " -G, --gapless-mode <n>        Encoder delay signaling for gapless playback\n"
 152 "                                 0: iTunSMPB (default)\n"
 153 "                                 1: ISO standard (edts + sgpd)\n"
 154 "                                 2: Both\n"
 155 " --ignorelength                Ignore length of WAV header\n"
 156 " -S, --silent                  Don't print progress messages\n"
 157 " --moov-before-mdat            Place moov box before mdat box on m4a output\n"
 158 "\n"
 159 "Options for raw (headerless) input:\n"
 160 " -R, --raw                     Treat input as raw (by default WAV is\n"
 161 "                               assumed)\n"
 162 " --raw-channels <n>            Number of channels (default: 2)\n"
 163 " --raw-rate     <n>            Sample rate (default: 44100)\n"
 164 " --raw-format   <spec>         Sample format, default is \"S16L\".\n"
 165 "                               Spec is as follows:\n"
 166 "                                1st char: S(igned)|U(nsigned)|F(loat)\n"
 167 "                                2nd part: bits per channel\n"
 168 "                                Last char: L(ittle)|B(ig)\n"
 169 "                               Last char can be omitted, in which case L is\n"
 170 "                               assumed. Spec is case insensitive, therefore\n"
 171 "                               \"u16b\" is same as \"U16B\".\n"
 172 "\n"
 173 "Tagging options:\n"
 174 " --title <string>\n"
 175 " --artist <string>\n"
 176 " --album <string>\n"
 177 " --genre <string>\n"
 178 " --date <string>\n"
 179 " --composer <string>\n"
 180 " --grouping <string>\n"
 181 " --comment <string>\n"
 182 " --album-artist <string>\n"
 183 " --track <number[/total]>\n"
 184 " --disk <number[/total]>\n"
 185 " --tempo <n>\n"
 186 " --tag <fcc>:<value>          Set iTunes predefined tag with four char code.\n"
 187 " --tag-from-file <fcc>:<filename>\n"
 188 "                              Same as above, but value is read from file.\n"
 189 " --long-tag <name>:<value>    Set arbitrary tag as iTunes custom metadata.\n"
 190 " --tag-from-json <filename[?dot_notation]>\n"
 191 "                              Read tags from JSON. By default, tags are\n"
 192 "                              assumed to be direct children of the root\n"
 193 "                              object(dictionary).\n"
 194 "                              Optionally, position of the dictionary\n"
 195 "                              that contains tags can be specified with\n"
 196 "                              dotted notation.\n"
 197 "                              Example:\n"
 198 "                                --tag-from-json /path/to/json?format.tags\n"
 199     , fdkaac_version);
 200 }
 201
 202 typedef struct aacenc_param_ex_t {
 203     AACENC_PARAMS
 204
 205     char *input_filename;
 206     char *output_filename;
 207     unsigned gapless_mode;
 208     unsigned ignore_length;
 209     int silent;
 210     int moov_before_mdat;
 211
 212     int is_raw;
 213     unsigned raw_channels;
 214     unsigned raw_rate;
 215     const char *raw_format;
 216
 217     aacenc_tag_param_t tags;
 218
 219     char *json_filename;
 220 } aacenc_param_ex_t;
 221
 222 static
 223 int parse_options(int argc, char **argv, aacenc_param_ex_t *params)
 224 {
 225     int ch;
 226     unsigned n;
 227
 228 #define OPT_MOOV_BEFORE_MDAT     M4AF_FOURCC('m','o','o','v')
 229 #define OPT_RAW_CHANNELS         M4AF_FOURCC('r','c','h','n')
 230 #define OPT_RAW_RATE             M4AF_FOURCC('r','r','a','t')
 231 #define OPT_RAW_FORMAT           M4AF_FOURCC('r','f','m','t')
 232 #define OPT_SHORT_TAG            M4AF_FOURCC('s','t','a','g')
 233 #define OPT_SHORT_TAG_FILE       M4AF_FOURCC('s','t','g','f')
 234 #define OPT_LONG_TAG             M4AF_FOURCC('l','t','a','g')
 235 #define OPT_TAG_FROM_JSON        M4AF_FOURCC('t','f','j','s')
 236
 237     static struct option long_options[] = {
 238         { "help",             no_argument,       0, 'h' },
 239         { "profile",          required_argument, 0, 'p' },
 240         { "bitrate",          required_argument, 0, 'b' },
 241         { "bitrate-mode",     required_argument, 0, 'm' },
 242         { "bandwidth",        required_argument, 0, 'w' },
 243         { "afterburner",      required_argument, 0, 'a' },
 244         { "lowdelay-sbr",     no_argument,       0, 'L' },
 245         { "sbr-signaling",    required_argument, 0, 's' },
 246         { "transport-format", required_argument, 0, 'f' },
 247         { "adts-crc-check",   no_argument,       0, 'C' },
 248         { "header-period",    required_argument, 0, 'P' },
 249
 250         { "gapless-mode",     required_argument, 0, 'G' },
 251         { "ignorelength",     no_argument,       0, 'I' },
 252         { "silent",           no_argument,       0, 'S' },
 253         { "moov-before-mdat", no_argument,       0, OPT_MOOV_BEFORE_MDAT   },
 254
 255         { "raw",              no_argument,       0, 'R' },
 256         { "raw-channels",     required_argument, 0, OPT_RAW_CHANNELS       },
 257         { "raw-rate",         required_argument, 0, OPT_RAW_RATE           },
 258         { "raw-format",       required_argument, 0, OPT_RAW_FORMAT         },
 259
 260         { "title",            required_argument, 0, M4AF_TAG_TITLE         },
 261         { "artist",           required_argument, 0, M4AF_TAG_ARTIST        },
 262         { "album",            required_argument, 0, M4AF_TAG_ALBUM         },
 263         { "genre",            required_argument, 0, M4AF_TAG_GENRE         },
 264         { "date",             required_argument, 0, M4AF_TAG_DATE          },
 265         { "composer",         required_argument, 0, M4AF_TAG_COMPOSER      },
 266         { "grouping",         required_argument, 0, M4AF_TAG_GROUPING      },
 267         { "comment",          required_argument, 0, M4AF_TAG_COMMENT       },
 268         { "album-artist",     required_argument, 0, M4AF_TAG_ALBUM_ARTIST  },
 269         { "track",            required_argument, 0, M4AF_TAG_TRACK         },
 270         { "disk",             required_argument, 0, M4AF_TAG_DISK          },
 271         { "tempo",            required_argument, 0, M4AF_TAG_TEMPO         },
 272         { "tag",              required_argument, 0, OPT_SHORT_TAG          },
 273         { "tag-from-file",    required_argument, 0, OPT_SHORT_TAG_FILE     },
 274         { "long-tag",         required_argument, 0, OPT_LONG_TAG           },
 275         { "tag-from-json",    required_argument, 0, OPT_TAG_FROM_JSON      },
 276         { 0,                  0,                 0, 0                      },
 277     };
 278     params->afterburner = 1;
 279
 280     aacenc_getmainargs(&argc, &argv);
 281     while ((ch = getopt_long(argc, argv, "hp:b:m:w:a:Ls:f:CP:G:Io:SR",
 282                              long_options, 0)) != EOF) {
 283         switch (ch) {
 284         case 'h':
 285             return usage(), -1;
 286         case 'p':
 287             if (sscanf(optarg, "%u", &n) != 1) {
 288                 fprintf(stderr, "invalid arg for profile\n");
 289                 return -1;
 290             }
 291             params->profile = n;
 292             break;
 293         case 'b':
 294             if (sscanf(optarg, "%u", &n) != 1) {
 295                 fprintf(stderr, "invalid arg for bitrate\n");
 296                 return -1;
 297             }
 298             params->bitrate = n;
 299             break;
 300         case 'm':
 301             if (sscanf(optarg, "%u", &n) != 1 || n > 5) {
 302                 fprintf(stderr, "invalid arg for bitrate-mode\n");
 303                 return -1;
 304             }
 305             params->bitrate_mode = n;
 306             break;
 307         case 'w':
 308             if (sscanf(optarg, "%u", &n) != 1) {
 309                 fprintf(stderr, "invalid arg for bandwidth\n");
 310                 return -1;
 311             }
 312             params->bandwidth = n;
 313             break;
 314         case 'a':
 315             if (sscanf(optarg, "%u", &n) != 1 || n > 1) {
 316                 fprintf(stderr, "invalid arg for afterburner\n");
 317                 return -1;
 318             }
 319             params->afterburner = n;
 320             break;
 321         case 'L':
 322             params->lowdelay_sbr = 1;
 323             break;
 324         case 's':
 325             if (sscanf(optarg, "%u", &n) != 1 || n > 2) {
 326                 fprintf(stderr, "invalid arg for sbr-signaling\n");
 327                 return -1;
 328             }
 329             params->sbr_signaling = n;
 330             break;
 331         case 'f':
 332             if (sscanf(optarg, "%u", &n) != 1) {
 333                 fprintf(stderr, "invalid arg for transport-format\n");
 334                 return -1;
 335             }
 336             params->transport_format = n;
 337             break;
 338         case 'C':
 339             params->adts_crc_check = 1;
 340             break;
 341         case 'P':
 342             if (sscanf(optarg, "%u", &n) != 1) {
 343                 fprintf(stderr, "invalid arg for header-period\n");
 344                 return -1;
 345             }
 346             params->header_period = n;
 347             break;
 348         case 'o':
 349             params->output_filename = optarg;
 350             break;
 351         case 'G':
 352             if (sscanf(optarg, "%u", &n) != 1 || n > 2) {
 353                 fprintf(stderr, "invalid arg for gapless-mode\n");
 354                 return -1;
 355             }
 356             params->gapless_mode = n;
 357             break;
 358         case 'I':
 359             params->ignore_length = 1;
 360             break;
 361         case 'S':
 362             params->silent = 1;
 363             break;
 364         case OPT_MOOV_BEFORE_MDAT:
 365             params->moov_before_mdat = 1;
 366             break;
 367         case 'R':
 368             params->is_raw = 1;
 369             break;
 370         case OPT_RAW_CHANNELS:
 371             if (sscanf(optarg, "%u", &n) != 1) {
 372                 fprintf(stderr, "invalid arg for raw-channels\n");
 373                 return -1;
 374             }
 375             params->raw_channels = n;
 376             break;
 377         case OPT_RAW_RATE:
 378             if (sscanf(optarg, "%u", &n) != 1) {
 379                 fprintf(stderr, "invalid arg for raw-rate\n");
 380                 return -1;
 381             }
 382             params->raw_rate = n;
 383             break;
 384         case OPT_RAW_FORMAT:
 385             params->raw_format = optarg;
 386             break;
 387         case M4AF_TAG_TITLE:
 388         case M4AF_TAG_ARTIST:
 389         case M4AF_TAG_ALBUM:
 390         case M4AF_TAG_GENRE:
 391         case M4AF_TAG_DATE:
 392         case M4AF_TAG_COMPOSER:
 393         case M4AF_TAG_GROUPING:
 394         case M4AF_TAG_COMMENT:
 395         case M4AF_TAG_ALBUM_ARTIST:
 396         case M4AF_TAG_TRACK:
 397         case M4AF_TAG_DISK:
 398         case M4AF_TAG_TEMPO:
 399             aacenc_param_add_itmf_entry(&params->tags, ch, 0, optarg,
 400                                         strlen(optarg), 0);
 401             break;
 402         case OPT_SHORT_TAG:
 403         case OPT_SHORT_TAG_FILE:
 404         case OPT_LONG_TAG:
 405             {
 406                 char *val;
 407                 size_t klen;
 408                 unsigned fcc = M4AF_FOURCC('-','-','-','-');
 409
 410                 if ((val = strchr(optarg, ':')) == 0) {
 411                     fprintf(stderr, "invalid arg for tag\n");
 412                     return -1;
 413                 }
 414                 *val++ = '\0';
 415                 if (ch == OPT_SHORT_TAG || ch == OPT_SHORT_TAG_FILE) {
 416                     /*
 417                      * take care of U+00A9(COPYRIGHT SIGN).
 418                      * 1) if length of fcc is 3, we prepend '\xa9'.
 419                      * 2) U+00A9 becomes "\xc2\xa9" in UTF-8. Therefore
 420                      *    we remove first '\xc2'.
 421                      */
 422                     if (optarg[0] == '\xc2')
 423                         ++optarg;
 424                     if ((klen = strlen(optarg))== 3)
 425                         fcc = 0xa9;
 426                     else if (klen != 4) {
 427                         fprintf(stderr, "invalid arg for tag\n");
 428                         return -1;
 429                     }
 430                     for (; *optarg; ++optarg)
 431                         fcc = ((fcc << 8) | (*optarg & 0xff));
 432                 }
 433                 aacenc_param_add_itmf_entry(&params->tags, fcc, optarg,
 434                                             val, strlen(val),
 435                                             ch == OPT_SHORT_TAG_FILE);
 436             }
 437             break;
 438         case OPT_TAG_FROM_JSON:
 439             params->json_filename = optarg;
 440             break;
 441         default:
 442             return usage(), -1;
 443         }
 444     }
 445     if (argc == optind)
 446         return usage(), -1;
 447
 448     if (!params->bitrate && !params->bitrate_mode) {
 449         fprintf(stderr, "bitrate or bitrate-mode is mandatory\n");
 450         return -1;
 451     }
 452     if (params->output_filename && !strcmp(params->output_filename, "-") &&
 453         !params->transport_format) {
 454         fprintf(stderr, "stdout streaming is not available on M4A output\n");
 455         return -1;
 456     }
 457     if (params->bitrate && params->bitrate < 10000)
 458         params->bitrate *= 1000;
 459
 460     if (params->is_raw) {
 461         if (!params->raw_channels)
 462             params->raw_channels = 2;
 463         if (!params->raw_rate)
 464             params->raw_rate = 44100;
 465         if (!params->raw_format)
 466             params->raw_format = "S16L";
 467     }
 468     params->input_filename = argv[optind];
 469     return 0;
 470 };
 471
 472 static
 473 int write_sample(FILE *ofp, m4af_ctx_t *m4af,
 474                  const void *data, uint32_t size, uint32_t duration)
 475 {
 476     if (!m4af) {
 477         fwrite(data, 1, size, ofp);
 478         if (ferror(ofp)) {
 479             fprintf(stderr, "ERROR: fwrite(): %s\n", strerror(errno));
 480             return -1;
 481         }
 482     } else if (m4af_write_sample(m4af, 0, data, size, duration) < 0) {
 483         fprintf(stderr, "ERROR: failed to write m4a sample\n");
 484         return -1;
 485     }
 486     return 0;
 487 }
 488
 489 static
 490 int encode(wav_reader_t *wavf, HANDLE_AACENCODER encoder,
 491            uint32_t frame_length, FILE *ofp, m4af_ctx_t *m4af,
 492            int show_progress)
 493 {
 494     uint8_t *ibuf = 0;
 495     int16_t *pcmbuf = 0;
 496     uint32_t pcmsize = 0;
 497     uint8_t *obuf = 0;
 498     uint32_t olen;
 499     uint32_t osize = 0;
 500     int nread = 1;
 501     int consumed;
 502     int rc = -1;
 503     int frames_written = 0;
 504     aacenc_progress_t progress = { 0 };
 505     const pcm_sample_description_t *format = wav_get_format(wavf);
 506
 507     ibuf = malloc(frame_length * format->bytes_per_frame);
 508     aacenc_progress_init(&progress, wav_get_length(wavf), format->sample_rate);
 509     do {
 510         if (g_interrupted)
 511             nread = 0;
 512         else if (nread) {
 513             if ((nread = wav_read_frames(wavf, ibuf, frame_length)) < 0) {
 514                 fprintf(stderr, "ERROR: read failed\n");
 515                 goto END;
 516             } else if (nread > 0) {
 517                 if (pcm_convert_to_native_sint16(format, ibuf, nread,
 518                                                  &pcmbuf, &pcmsize) < 0) {
 519                     fprintf(stderr, "ERROR: unsupported sample format\n");
 520                     goto END;
 521                 }
 522             }
 523             if (show_progress)
 524                 aacenc_progress_update(&progress, wav_get_position(wavf),
 525                                        format->sample_rate * 2);
 526         }
 527         if ((consumed = aac_encode_frame(encoder, format, pcmbuf, nread,
 528                                          &obuf, &olen, &osize)) < 0)
 529             goto END;
 530         if (olen > 0) {
 531             if (write_sample(ofp, m4af, obuf, olen, frame_length) < 0)
 532                 goto END;
 533             ++frames_written;
 534         }
 535     } while (nread > 0 || olen > 0);
 536
 537     if (show_progress)
 538         aacenc_progress_finish(&progress, wav_get_position(wavf));
 539     rc = frames_written;
 540 END:
 541     if (ibuf) free(ibuf);
 542     if (pcmbuf) free(pcmbuf);
 543     if (obuf) free(obuf);
 544     return rc;
 545 }
 546
 547 static
 548 void put_tool_tag(m4af_ctx_t *m4af, const aacenc_param_ex_t *params,
 549                   HANDLE_AACENCODER encoder)
 550 {
 551     char tool_info[256];
 552     char *p = tool_info;
 553     LIB_INFO *lib_info = 0;
 554
 555     p += sprintf(p, PROGNAME " %s, ", fdkaac_version);
 556
 557     lib_info = calloc(FDK_MODULE_LAST, sizeof(LIB_INFO));
 558     if (aacEncGetLibInfo(lib_info) == AACENC_OK) {
 559         int i;
 560         for (i = 0; i < FDK_MODULE_LAST; ++i)
 561             if (lib_info[i].module_id == FDK_AACENC)
 562                 break;
 563         p += sprintf(p, "libfdk-aac %s, ", lib_info[i].versionStr);
 564     }
 565     free(lib_info);
 566     if (params->bitrate_mode)
 567         sprintf(p, "VBR mode %d", params->bitrate_mode);
 568     else
 569         sprintf(p, "CBR %dkbps",
 570                 aacEncoder_GetParam(encoder, AACENC_BITRATE) / 1000);
 571
 572     m4af_add_itmf_string_tag(m4af, M4AF_TAG_TOOL, tool_info);
 573 }
 574
 575 static
 576 int finalize_m4a(m4af_ctx_t *m4af, const aacenc_param_ex_t *params,
 577                  HANDLE_AACENCODER encoder)
 578 {
 579     unsigned i;
 580     aacenc_tag_entry_t *tag = params->tags.tag_table;
 581
 582     if (params->json_filename)
 583         aacenc_put_tags_from_json(m4af, params->json_filename);
 584
 585     for (i = 0; i < params->tags.tag_count; ++i, ++tag)
 586         aacenc_put_tag_entry(m4af, tag);
 587
 588     put_tool_tag(m4af, params, encoder);
 589
 590     if (m4af_finalize(m4af, params->moov_before_mdat) < 0) {
 591         fprintf(stderr, "ERROR: failed to finalize m4a\n");
 592         return -1;
 593     }
 594     return 0;
 595 }
 596
 597 static
 598 char *generate_output_filename(const char *filename, const char *ext)
 599 {
 600     char *p = 0;
 601     size_t ext_len = strlen(ext);
 602
 603     if (strcmp(filename, "-") == 0) {
 604         p = malloc(ext_len + 6);
 605         sprintf(p, "stdin%s", ext);
 606     } else {
 607         const char *base = aacenc_basename(filename);
 608         size_t ilen = strlen(base);
 609         const char *ext_org = strrchr(base, '.');
 610         if (ext_org) ilen = ext_org - base;
 611         p = malloc(ilen + ext_len + 1);
 612         sprintf(p, "%.*s%s", ilen, base, ext);
 613     }
 614     return p;
 615 }
 616
 617 static
 618 int parse_raw_spec(const char *spec, pcm_sample_description_t *desc)
 619 {
 620     unsigned bits;
 621     unsigned char c_type, c_endian = 'L';
 622     int type;
 623
 624     if (sscanf(spec, "%c%u%c", &c_type, &bits, &c_endian) < 2)
 625         return -1;
 626     c_type = toupper(c_type);
 627     c_endian = toupper(c_endian);
 628
 629     if (c_type == 'S')
 630         type = 1;
 631     else if (c_type == 'U')
 632         type = 2;
 633     else if (c_type == 'F')
 634         type = 4;
 635     else
 636         return -1;
 637
 638     if (c_endian == 'B')
 639         type |= 8;
 640     else if (c_endian != 'L')
 641         return -1;
 642
 643     if (c_type == 'F' && bits != 32 && bits != 64)
 644         return -1;
 645     if (c_type != 'F' && (bits < 8 || bits > 32))
 646         return -1;
 647
 648     desc->sample_type = type;
 649     desc->bits_per_channel = bits;
 650     return 0;
 651 }
 652
 653 int main(int argc, char **argv)
 654 {
 655     wav_io_context_t wav_io = { read_callback, seek_callback, tell_callback };
 656     m4af_io_callbacks_t
 657         m4af_io = { read_callback, write_callback, seek_callback, tell_callback };
 658     aacenc_param_ex_t params = { 0 };
 659
 660     int result = 2;
 661     FILE *ifp = 0;
 662     FILE *ofp = 0;
 663     char *output_filename = 0;
 664     wav_reader_t *wavf = 0;
 665     HANDLE_AACENCODER encoder = 0;
 666     AACENC_InfoStruct aacinfo = { 0 };
 667     m4af_ctx_t *m4af = 0;
 668     const pcm_sample_description_t *sample_format;
 669     int downsampled_timescale = 0;
 670     int frame_count = 0;
 671     struct stat stb = { 0 };
 672
 673     setlocale(LC_CTYPE, "");
 674     setbuf(stderr, 0);
 675
 676     if (parse_options(argc, argv, &params) < 0)
 677         return 1;
 678
 679     if ((ifp = aacenc_fopen(params.input_filename, "rb")) == 0) {
 680         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params.input_filename,
 681                        strerror(errno));
 682         goto END;
 683     }
 684     if (fstat(fileno(ifp), &stb) == 0 && (stb.st_mode & S_IFMT) != S_IFREG) {
 685         wav_io.seek = 0;
 686         wav_io.tell = 0;
 687     }
 688     if (!params.is_raw) {
 689         if ((wavf = wav_open(&wav_io, ifp, params.ignore_length)) == 0) {
 690             fprintf(stderr, "ERROR: broken / unsupported input file\n");
 691             goto END;
 692         }
 693     } else {
 694         int bytes_per_channel;
 695         pcm_sample_description_t desc = { 0 };
 696         if (parse_raw_spec(params.raw_format, &desc) < 0) {
 697             fprintf(stderr, "ERROR: invalid raw-format spec\n");
 698             goto END;
 699         }
 700         desc.sample_rate = params.raw_rate;
 701         desc.channels_per_frame = params.raw_channels;
 702         bytes_per_channel = (desc.bits_per_channel + 7) / 8;
 703         desc.bytes_per_frame = params.raw_channels * bytes_per_channel;
 704         if ((wavf = raw_open(&wav_io, ifp, &desc)) == 0) {
 705             fprintf(stderr, "ERROR: failed to open raw input\n");
 706             goto END;
 707         }
 708     }
 709     sample_format = wav_get_format(wavf);
 710
 711     if (aacenc_init(&encoder, (aacenc_param_t*)&params, sample_format,
 712                     &aacinfo) < 0)
 713         goto END;
 714
 715     if (!params.output_filename) {
 716         const char *ext = params.transport_format ? ".aac" : ".m4a";
 717         output_filename = generate_output_filename(params.input_filename, ext);
 718         params.output_filename = output_filename;
 719     }
 720
 721     if ((ofp = aacenc_fopen(params.output_filename, "wb+")) == 0) {
 722         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params.output_filename,
 723                        strerror(errno));
 724         goto END;
 725     }
 726     handle_signals();
 727     if (!params.transport_format) {
 728         uint32_t scale;
 729         unsigned framelen = aacinfo.frameLength;
 730         int sbr_mode = aacenc_is_sbr_active((aacenc_param_t*)&params);
 731         int sig_mode = aacEncoder_GetParam(encoder, AACENC_SIGNALING_MODE);
 732         if (sbr_mode && !sig_mode)
 733             downsampled_timescale = 1;
 734         scale = sample_format->sample_rate >> downsampled_timescale;
 735         if ((m4af = m4af_create(M4AF_CODEC_MP4A, scale, &m4af_io, ofp)) < 0)
 736             goto END;
 737         m4af_set_decoder_specific_info(m4af, 0, aacinfo.confBuf,
 738                                        aacinfo.confSize);
 739         m4af_set_fixed_frame_duration(m4af, 0,
 740                                       framelen >> downsampled_timescale);
 741         m4af_set_priming_mode(m4af, params.gapless_mode + 1);
 742         m4af_begin_write(m4af);
 743     }
 744     frame_count = encode(wavf, encoder, aacinfo.frameLength, ofp, m4af,
 745                          !params.silent);
 746     if (frame_count < 0)
 747         goto END;
 748     if (m4af) {
 749         uint32_t delay = aacinfo.encoderDelay;
 750         int64_t frames_read = wav_get_position(wavf);
 751         uint32_t padding = frame_count * aacinfo.frameLength
 752                             - frames_read - aacinfo.encoderDelay;
 753         m4af_set_priming(m4af, 0, delay >> downsampled_timescale,
 754                          padding >> downsampled_timescale);
 755         if (finalize_m4a(m4af, &params, encoder) < 0)
 756             goto END;
 757     }
 758     result = 0;
 759 END:
 760     if (wavf) wav_teardown(&wavf);
 761     if (ifp) fclose(ifp);
 762     if (m4af) m4af_teardown(&m4af);
 763     if (ofp) fclose(ofp);
 764     if (encoder) aacEncClose(&encoder);
 765     if (output_filename) free(output_filename);
 766     if (params.tags.tag_table) free(params.tags.tag_table);
 767
 768     return result;
 769 }