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 "caf_reader.h"
  38 #include "aacenc.h"
  39 #include "m4af.h"
  40 #include "progress.h"
  41 #include "version.h"
  42 #include "metadata.h"
  43
  44 #define PROGNAME "fdkaac"
  45
  46 static volatile int g_interrupted = 0;
  47
  48 #if HAVE_SIGACTION
  49 static void signal_handler(int signum)
  50 {
  51     g_interrupted = 1;
  52 }
  53 static void handle_signals(void)
  54 {
  55     int i, sigs[] = { SIGINT, SIGHUP, SIGTERM };
  56     for (i = 0; i < sizeof(sigs)/sizeof(sigs[0]); ++i) {
  57         struct sigaction sa = { 0 };
  58         sa.sa_handler = signal_handler;
  59         sa.sa_flags |= SA_RESTART;
  60         sigaction(sigs[i], &sa, 0);
  61     }
  62 }
  63 #elif defined(_WIN32)
  64 static BOOL WINAPI signal_handler(DWORD type)
  65 {
  66     g_interrupted = 1;
  67     return TRUE;
  68 }
  69
  70 static void handle_signals(void)
  71 {
  72     SetConsoleCtrlHandler(signal_handler, TRUE);
  73 }
  74 #else
  75 static void handle_signals(void)
  76 {
  77 }
  78 #endif
  79
  80 static
  81 int read_callback(void *cookie, void *data, uint32_t size)
  82 {
  83     size_t rc = fread(data, 1, size, (FILE*)cookie);
  84     return ferror((FILE*)cookie) ? -1 : (int)rc;
  85 }
  86
  87 static
  88 int write_callback(void *cookie, const void *data, uint32_t size)
  89 {
  90     size_t rc = fwrite(data, 1, size, (FILE*)cookie);
  91     return ferror((FILE*)cookie) ? -1 : (int)rc;
  92 }
  93
  94 static
  95 int seek_callback(void *cookie, int64_t off, int whence)
  96 {
  97     return fseeko((FILE*)cookie, off, whence);
  98 }
  99
 100 static
 101 int64_t tell_callback(void *cookie)
 102 {
 103     return ftello((FILE*)cookie);
 104 }
 105
 106 static
 107 void usage(void)
 108 {
 109     printf(
 110 PROGNAME " %s\n"
 111 "Usage: " PROGNAME " [options] input_file\n"
 112 "Options:\n"
 113 " -h, --help                    Print this help message\n"
 114 " -p, --profile <n>             Profile (audio object type)\n"
 115 "                                 2: MPEG-4 AAC LC (default)\n"
 116 "                                 5: MPEG-4 HE-AAC (SBR)\n"
 117 "                                29: MPEG-4 HE-AAC v2 (SBR+PS)\n"
 118 "                                23: MPEG-4 AAC LD\n"
 119 "                                39: MPEG-4 AAC ELD\n"
 120 "                               129: MPEG-2 AAC LC\n"
 121 "                               132: MPEG-2 HE-AAC (SBR)\n"
 122 "                               156: MPEG-2 HE-AAC v2 (SBR+PS)\n"
 123 " -b, --bitrate <n>             Bitrate in bits per seconds (for CBR)\n"
 124 " -m, --bitrate-mode <n>        Bitrate configuration\n"
 125 "                                 0: CBR (default)\n"
 126 "                                 1-5: VBR\n"
 127 "                               (VBR mode is not officially supported, and\n"
 128 "                                works only on a certain combination of\n"
 129 "                                parameter settings, sample rate, and\n"
 130 "                                channel configuration)\n"
 131 " -w, --bandwidth <n>           Frequency bandwidth in Hz (AAC LC only)\n"
 132 " -a, --afterburner <n>         Afterburner\n"
 133 "                                 0: Off\n"
 134 "                                 1: On(default)\n"
 135 " -L, --lowdelay-sbr            Enable ELD-SBR (AAC ELD only)\n"
 136 " -f, --transport-format <n>    Transport format\n"
 137 "                                 0: RAW (default, muxed into M4A)\n"
 138 "                                 1: ADIF\n"
 139 "                                 2: ADTS\n"
 140 "                                 6: LATM MCP=1\n"
 141 "                                 7: LATM MCP=0\n"
 142 "                                10: LOAS/LATM (LATM within LOAS)\n"
 143 " -C, --adts-crc-check          Add CRC protection on ADTS header\n"
 144 " -h, --header-period <n>       StreamMuxConfig/PCE repetition period in\n"
 145 "                               transport layer\n"
 146 "\n"
 147 " -o <filename>                 Output filename\n"
 148 " -G, --gapless-mode <n>        Encoder delay signaling for gapless playback\n"
 149 "                                 0: iTunSMPB (default)\n"
 150 "                                 1: ISO standard (edts + sgpd)\n"
 151 "                                 2: Both\n"
 152 " -I, --ignorelength            Ignore length of WAV header\n"
 153 " -S, --silent                  Don't print progress messages\n"
 154 " --moov-before-mdat            Place moov box before mdat box on m4a output\n"
 155 "\n"
 156 "Options for raw (headerless) input:\n"
 157 " -R, --raw                     Treat input as raw (by default WAV is\n"
 158 "                               assumed)\n"
 159 " --raw-channels <n>            Number of channels (default: 2)\n"
 160 " --raw-rate     <n>            Sample rate (default: 44100)\n"
 161 " --raw-format   <spec>         Sample format, default is \"S16L\".\n"
 162 "                               Spec is as follows:\n"
 163 "                                1st char: S(igned)|U(nsigned)|F(loat)\n"
 164 "                                2nd part: bits per channel\n"
 165 "                                Last char: L(ittle)|B(ig)\n"
 166 "                               Last char can be omitted, in which case L is\n"
 167 "                               assumed. Spec is case insensitive, therefore\n"
 168 "                               \"u16b\" is same as \"U16B\".\n"
 169 "\n"
 170 "Tagging options:\n"
 171 " --title <string>\n"
 172 " --artist <string>\n"
 173 " --album <string>\n"
 174 " --genre <string>\n"
 175 " --date <string>\n"
 176 " --composer <string>\n"
 177 " --grouping <string>\n"
 178 " --comment <string>\n"
 179 " --album-artist <string>\n"
 180 " --track <number[/total]>\n"
 181 " --disk <number[/total]>\n"
 182 " --tempo <n>\n"
 183 " --tag <fcc>:<value>          Set iTunes predefined tag with four char code.\n"
 184 " --tag-from-file <fcc>:<filename>\n"
 185 "                              Same as above, but value is read from file.\n"
 186 " --long-tag <name>:<value>    Set arbitrary tag as iTunes custom metadata.\n"
 187 " --tag-from-json <filename[?dot_notation]>\n"
 188 "                              Read tags from JSON. By default, tags are\n"
 189 "                              assumed to be direct children of the root\n"
 190 "                              object(dictionary).\n"
 191 "                              Optionally, position of the dictionary\n"
 192 "                              that contains tags can be specified with\n"
 193 "                              dotted notation.\n"
 194 "                              Example:\n"
 195 "                                --tag-from-json /path/to/json?format.tags\n"
 196     , fdkaac_version);
 197 }
 198
 199 typedef struct aacenc_param_ex_t {
 200     AACENC_PARAMS
 201
 202     char *input_filename;
 203     FILE *input_fp;
 204     char *output_filename;
 205     FILE *output_fp;
 206     unsigned gapless_mode;
 207     unsigned ignore_length;
 208     int silent;
 209     int moov_before_mdat;
 210
 211     int is_raw;
 212     unsigned raw_channels;
 213     unsigned raw_rate;
 214     const char *raw_format;
 215
 216     aacenc_tag_store_t tags;
 217     aacenc_tag_store_t source_tags;
 218     aacenc_translate_generic_text_tag_ctx_t source_tag_ctx;
 219
 220     char *json_filename;
 221 } aacenc_param_ex_t;
 222
 223 static
 224 int parse_options(int argc, char **argv, aacenc_param_ex_t *params)
 225 {
 226     int ch;
 227     unsigned n;
 228
 229 #define OPT_MOOV_BEFORE_MDAT     M4AF_FOURCC('m','o','o','v')
 230 #define OPT_RAW_CHANNELS         M4AF_FOURCC('r','c','h','n')
 231 #define OPT_RAW_RATE             M4AF_FOURCC('r','r','a','t')
 232 #define OPT_RAW_FORMAT           M4AF_FOURCC('r','f','m','t')
 233 #define OPT_SHORT_TAG            M4AF_FOURCC('s','t','a','g')
 234 #define OPT_SHORT_TAG_FILE       M4AF_FOURCC('s','t','g','f')
 235 #define OPT_LONG_TAG             M4AF_FOURCC('l','t','a','g')
 236 #define OPT_TAG_FROM_JSON        M4AF_FOURCC('t','f','j','s')
 237
 238     static struct option long_options[] = {
 239         { "help",             no_argument,       0, 'h' },
 240         { "profile",          required_argument, 0, 'p' },
 241         { "bitrate",          required_argument, 0, 'b' },
 242         { "bitrate-mode",     required_argument, 0, 'm' },
 243         { "bandwidth",        required_argument, 0, 'w' },
 244         { "afterburner",      required_argument, 0, 'a' },
 245         { "lowdelay-sbr",     no_argument,       0, 'L' },
 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 'f':
 325             if (sscanf(optarg, "%u", &n) != 1) {
 326                 fprintf(stderr, "invalid arg for transport-format\n");
 327                 return -1;
 328             }
 329             params->transport_format = n;
 330             break;
 331         case 'C':
 332             params->adts_crc_check = 1;
 333             break;
 334         case 'P':
 335             if (sscanf(optarg, "%u", &n) != 1) {
 336                 fprintf(stderr, "invalid arg for header-period\n");
 337                 return -1;
 338             }
 339             params->header_period = n;
 340             break;
 341         case 'o':
 342             params->output_filename = optarg;
 343             break;
 344         case 'G':
 345             if (sscanf(optarg, "%u", &n) != 1 || n > 2) {
 346                 fprintf(stderr, "invalid arg for gapless-mode\n");
 347                 return -1;
 348             }
 349             params->gapless_mode = n;
 350             break;
 351         case 'I':
 352             params->ignore_length = 1;
 353             break;
 354         case 'S':
 355             params->silent = 1;
 356             break;
 357         case OPT_MOOV_BEFORE_MDAT:
 358             params->moov_before_mdat = 1;
 359             break;
 360         case 'R':
 361             params->is_raw = 1;
 362             break;
 363         case OPT_RAW_CHANNELS:
 364             if (sscanf(optarg, "%u", &n) != 1) {
 365                 fprintf(stderr, "invalid arg for raw-channels\n");
 366                 return -1;
 367             }
 368             params->raw_channels = n;
 369             break;
 370         case OPT_RAW_RATE:
 371             if (sscanf(optarg, "%u", &n) != 1) {
 372                 fprintf(stderr, "invalid arg for raw-rate\n");
 373                 return -1;
 374             }
 375             params->raw_rate = n;
 376             break;
 377         case OPT_RAW_FORMAT:
 378             params->raw_format = optarg;
 379             break;
 380         case M4AF_TAG_TITLE:
 381         case M4AF_TAG_ARTIST:
 382         case M4AF_TAG_ALBUM:
 383         case M4AF_TAG_GENRE:
 384         case M4AF_TAG_DATE:
 385         case M4AF_TAG_COMPOSER:
 386         case M4AF_TAG_GROUPING:
 387         case M4AF_TAG_COMMENT:
 388         case M4AF_TAG_ALBUM_ARTIST:
 389         case M4AF_TAG_TRACK:
 390         case M4AF_TAG_DISK:
 391         case M4AF_TAG_TEMPO:
 392             aacenc_add_tag_to_store(&params->tags, ch, 0, optarg,
 393                                     strlen(optarg), 0);
 394             break;
 395         case OPT_SHORT_TAG:
 396         case OPT_SHORT_TAG_FILE:
 397         case OPT_LONG_TAG:
 398             {
 399                 char *val;
 400                 size_t klen;
 401                 unsigned fcc = M4AF_FOURCC('-','-','-','-');
 402
 403                 if ((val = strchr(optarg, ':')) == 0) {
 404                     fprintf(stderr, "invalid arg for tag\n");
 405                     return -1;
 406                 }
 407                 *val++ = '\0';
 408                 if (ch == OPT_SHORT_TAG || ch == OPT_SHORT_TAG_FILE) {
 409                     /*
 410                      * take care of U+00A9(COPYRIGHT SIGN).
 411                      * 1) if length of fcc is 3, we prepend '\xa9'.
 412                      * 2) U+00A9 becomes "\xc2\xa9" in UTF-8. Therefore
 413                      *    we remove first '\xc2'.
 414                      */
 415                     if (optarg[0] == '\xc2')
 416                         ++optarg;
 417                     if ((klen = strlen(optarg))== 3)
 418                         fcc = 0xa9;
 419                     else if (klen != 4) {
 420                         fprintf(stderr, "invalid arg for tag\n");
 421                         return -1;
 422                     }
 423                     for (; *optarg; ++optarg)
 424                         fcc = ((fcc << 8) | (*optarg & 0xff));
 425                 }
 426                 aacenc_add_tag_to_store(&params->tags, fcc, optarg,
 427                                         val, strlen(val),
 428                                         ch == OPT_SHORT_TAG_FILE);
 429             }
 430             break;
 431         case OPT_TAG_FROM_JSON:
 432             params->json_filename = optarg;
 433             break;
 434         default:
 435             return usage(), -1;
 436         }
 437     }
 438     if (argc == optind)
 439         return usage(), -1;
 440
 441     if (!params->bitrate && !params->bitrate_mode) {
 442         fprintf(stderr, "bitrate or bitrate-mode is mandatory\n");
 443         return -1;
 444     }
 445     if (params->output_filename && !strcmp(params->output_filename, "-") &&
 446         !params->transport_format) {
 447         fprintf(stderr, "stdout streaming is not available on M4A output\n");
 448         return -1;
 449     }
 450     if (params->bitrate && params->bitrate < 10000)
 451         params->bitrate *= 1000;
 452
 453     if (params->is_raw) {
 454         if (!params->raw_channels)
 455             params->raw_channels = 2;
 456         if (!params->raw_rate)
 457             params->raw_rate = 44100;
 458         if (!params->raw_format)
 459             params->raw_format = "S16L";
 460     }
 461     params->input_filename = argv[optind];
 462     return 0;
 463 };
 464
 465 static
 466 int write_sample(FILE *ofp, m4af_ctx_t *m4af,
 467                  const void *data, uint32_t size, uint32_t duration)
 468 {
 469     if (!m4af) {
 470         fwrite(data, 1, size, ofp);
 471         if (ferror(ofp)) {
 472             fprintf(stderr, "ERROR: fwrite(): %s\n", strerror(errno));
 473             return -1;
 474         }
 475     } else if (m4af_write_sample(m4af, 0, data, size, duration) < 0) {
 476         fprintf(stderr, "ERROR: failed to write m4a sample\n");
 477         return -1;
 478     }
 479     return 0;
 480 }
 481
 482 static
 483 int encode(pcm_reader_t *reader, HANDLE_AACENCODER encoder,
 484            uint32_t frame_length, FILE *ofp, m4af_ctx_t *m4af,
 485            int show_progress)
 486 {
 487     int16_t *ibuf = 0;
 488     uint8_t *obuf = 0;
 489     uint32_t olen;
 490     uint32_t osize = 0;
 491     int nread = 1;
 492     int consumed;
 493     int rc = -1;
 494     int frames_written = 0;
 495     aacenc_progress_t progress = { 0 };
 496     const pcm_sample_description_t *fmt = pcm_get_format(reader);
 497
 498     ibuf = malloc(frame_length * fmt->bytes_per_frame);
 499     aacenc_progress_init(&progress, pcm_get_length(reader), fmt->sample_rate);
 500     do {
 501         if (g_interrupted)
 502             nread = 0;
 503         else if (nread) {
 504             if ((nread = pcm_read_frames(reader, ibuf, frame_length)) < 0) {
 505                 fprintf(stderr, "ERROR: read failed\n");
 506                 goto END;
 507             }
 508             if (show_progress)
 509                 aacenc_progress_update(&progress, pcm_get_position(reader),
 510                                        fmt->sample_rate * 2);
 511         }
 512         if ((consumed = aac_encode_frame(encoder, fmt, ibuf, nread,
 513                                          &obuf, &olen, &osize)) < 0)
 514             goto END;
 515         if (olen > 0) {
 516             if (write_sample(ofp, m4af, obuf, olen, frame_length) < 0)
 517                 goto END;
 518             ++frames_written;
 519         }
 520     } while (nread > 0 || olen > 0);
 521
 522     if (show_progress)
 523         aacenc_progress_finish(&progress, pcm_get_position(reader));
 524     rc = frames_written;
 525 END:
 526     if (ibuf) free(ibuf);
 527     if (obuf) free(obuf);
 528     return rc;
 529 }
 530
 531 static
 532 void put_tool_tag(m4af_ctx_t *m4af, const aacenc_param_ex_t *params,
 533                   HANDLE_AACENCODER encoder)
 534 {
 535     char tool_info[256];
 536     char *p = tool_info;
 537     LIB_INFO *lib_info = 0;
 538
 539     p += sprintf(p, PROGNAME " %s, ", fdkaac_version);
 540
 541     lib_info = calloc(FDK_MODULE_LAST, sizeof(LIB_INFO));
 542     if (aacEncGetLibInfo(lib_info) == AACENC_OK) {
 543         int i;
 544         for (i = 0; i < FDK_MODULE_LAST; ++i)
 545             if (lib_info[i].module_id == FDK_AACENC)
 546                 break;
 547         p += sprintf(p, "libfdk-aac %s, ", lib_info[i].versionStr);
 548     }
 549     free(lib_info);
 550     if (params->bitrate_mode)
 551         sprintf(p, "VBR mode %d", params->bitrate_mode);
 552     else
 553         sprintf(p, "CBR %dkbps",
 554                 aacEncoder_GetParam(encoder, AACENC_BITRATE) / 1000);
 555
 556     m4af_add_itmf_string_tag(m4af, M4AF_TAG_TOOL, tool_info);
 557 }
 558
 559 static
 560 int finalize_m4a(m4af_ctx_t *m4af, const aacenc_param_ex_t *params,
 561                  HANDLE_AACENCODER encoder)
 562 {
 563     unsigned i;
 564     aacenc_tag_entry_t *tag;
 565
 566     tag = params->source_tags.tag_table;
 567     for (i = 0; i < params->source_tags.tag_count; ++i, ++tag)
 568         aacenc_write_tag_entry(m4af, tag);
 569
 570     if (params->json_filename)
 571         aacenc_write_tags_from_json(m4af, params->json_filename);
 572
 573     tag = params->tags.tag_table;
 574     for (i = 0; i < params->tags.tag_count; ++i, ++tag)
 575         aacenc_write_tag_entry(m4af, tag);
 576
 577     put_tool_tag(m4af, params, encoder);
 578
 579     if (m4af_finalize(m4af, params->moov_before_mdat) < 0) {
 580         fprintf(stderr, "ERROR: failed to finalize m4a\n");
 581         return -1;
 582     }
 583     return 0;
 584 }
 585
 586 static
 587 char *generate_output_filename(const char *filename, const char *ext)
 588 {
 589     char *p = 0;
 590     size_t ext_len = strlen(ext);
 591
 592     if (strcmp(filename, "-") == 0) {
 593         p = malloc(ext_len + 6);
 594         sprintf(p, "stdin%s", ext);
 595     } else {
 596         const char *base = aacenc_basename(filename);
 597         size_t ilen = strlen(base);
 598         const char *ext_org = strrchr(base, '.');
 599         if (ext_org) ilen = ext_org - base;
 600         p = malloc(ilen + ext_len + 1);
 601         sprintf(p, "%.*s%s", ilen, base, ext);
 602     }
 603     return p;
 604 }
 605
 606 static
 607 int parse_raw_spec(const char *spec, pcm_sample_description_t *desc)
 608 {
 609     unsigned bits;
 610     unsigned char c_type, c_endian = 'L';
 611     int type;
 612
 613     if (sscanf(spec, "%c%u%c", &c_type, &bits, &c_endian) < 2)
 614         return -1;
 615     c_type = toupper(c_type);
 616     c_endian = toupper(c_endian);
 617
 618     if (c_type == 'S')
 619         type = 1;
 620     else if (c_type == 'U')
 621         type = 2;
 622     else if (c_type == 'F')
 623         type = 4;
 624     else
 625         return -1;
 626
 627     if (c_endian == 'B')
 628         type |= 8;
 629     else if (c_endian != 'L')
 630         return -1;
 631
 632     if (c_type == 'F' && bits != 32 && bits != 64)
 633         return -1;
 634     if (c_type != 'F' && (bits < 8 || bits > 32))
 635         return -1;
 636
 637     desc->sample_type = type;
 638     desc->bits_per_channel = bits;
 639     return 0;
 640 }
 641
 642 static pcm_io_vtbl_t pcm_io_vtbl = {
 643     read_callback, seek_callback, tell_callback
 644 };
 645 static pcm_io_vtbl_t pcm_io_vtbl_noseek = { read_callback, 0, 0 };
 646
 647 static
 648 pcm_reader_t *open_input(aacenc_param_ex_t *params)
 649 {
 650     pcm_io_context_t io = { 0 };
 651     pcm_reader_t *reader = 0;
 652     struct stat stb = { 0 };
 653
 654     if ((params->input_fp = aacenc_fopen(params->input_filename, "rb")) == 0) {
 655         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params->input_filename,
 656                        strerror(errno));
 657         goto END;
 658     }
 659     io.cookie = params->input_fp;
 660     if (fstat(fileno(params->input_fp), &stb) == 0
 661             && (stb.st_mode & S_IFMT) == S_IFREG)
 662         io.vtbl = &pcm_io_vtbl;
 663     else
 664         io.vtbl = &pcm_io_vtbl_noseek;
 665
 666     if (params->is_raw) {
 667         int bytes_per_channel;
 668         pcm_sample_description_t desc = { 0 };
 669         if (parse_raw_spec(params->raw_format, &desc) < 0) {
 670             fprintf(stderr, "ERROR: invalid raw-format spec\n");
 671             goto END;
 672         }
 673         desc.sample_rate = params->raw_rate;
 674         desc.channels_per_frame = params->raw_channels;
 675         bytes_per_channel = (desc.bits_per_channel + 7) / 8;
 676         desc.bytes_per_frame = params->raw_channels * bytes_per_channel;
 677         if ((reader = raw_open(&io, &desc)) == 0) {
 678             fprintf(stderr, "ERROR: failed to open raw input\n");
 679             goto END;
 680         }
 681     } else {
 682         int c;
 683         ungetc(c = getc(params->input_fp), params->input_fp);
 684
 685         switch (c) {
 686         case 'R':
 687             if ((reader = wav_open(&io, params->ignore_length)) == 0) {
 688                 fprintf(stderr, "ERROR: broken / unsupported input file\n");
 689                 goto END;
 690             }
 691             break;
 692         case 'c':
 693             params->source_tag_ctx.add = aacenc_add_tag_entry_to_store;
 694             params->source_tag_ctx.add_ctx = &params->source_tags;
 695             if ((reader = caf_open(&io,
 696                                    aacenc_translate_generic_text_tag,
 697                                    &params->source_tag_ctx)) == 0) {
 698                 fprintf(stderr, "ERROR: broken / unsupported input file\n");
 699                 goto END;
 700             }
 701             break;
 702         default:
 703             goto END;
 704         }
 705     }
 706     return pcm_open_sint16_converter(reader);
 707 END:
 708     return 0;
 709 }
 710
 711 int main(int argc, char **argv)
 712 {
 713     static m4af_io_callbacks_t m4af_io = {
 714         read_callback, write_callback, seek_callback, tell_callback
 715     };
 716     aacenc_param_ex_t params = { 0 };
 717
 718     int result = 2;
 719     char *output_filename = 0;
 720     pcm_reader_t *reader = 0;
 721     HANDLE_AACENCODER encoder = 0;
 722     AACENC_InfoStruct aacinfo = { 0 };
 723     m4af_ctx_t *m4af = 0;
 724     const pcm_sample_description_t *sample_format;
 725     int downsampled_timescale = 0;
 726     int frame_count = 0;
 727     int sbr_mode = 0;
 728
 729     setlocale(LC_CTYPE, "");
 730     setbuf(stderr, 0);
 731
 732     if (parse_options(argc, argv, &params) < 0)
 733         return 1;
 734
 735     if ((reader = open_input(&params)) == 0)
 736         goto END;
 737
 738     sample_format = pcm_get_format(reader);
 739
 740     /*
 741      * We use explicit/hierarchical signaling for LOAS.
 742      * Other than that, we request implicit signaling to FDK library, then
 743      * append explicit/backward-compatible signaling to ASC in case of MP4FF.
 744      *
 745      * Explicit/backward-compatible signaling of SBR is the most recommended
 746      * way in MPEG4 part3 spec, and seems the only way supported by iTunes.
 747      * Since FDK library does not support it, we have to do it on our side.
 748      */
 749     params.sbr_signaling = (params.transport_format == TT_MP4_LOAS) ? 2 : 0;
 750
 751     if (aacenc_init(&encoder, (aacenc_param_t*)&params, sample_format,
 752                     &aacinfo) < 0)
 753         goto END;
 754
 755     if (!params.output_filename) {
 756         const char *ext = params.transport_format ? ".aac" : ".m4a";
 757         output_filename = generate_output_filename(params.input_filename, ext);
 758         params.output_filename = output_filename;
 759     }
 760
 761     if ((params.output_fp = aacenc_fopen(params.output_filename, "wb+")) == 0) {
 762         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params.output_filename,
 763                        strerror(errno));
 764         goto END;
 765     }
 766     handle_signals();
 767     sbr_mode = aacenc_is_sbr_active((aacenc_param_t*)&params);
 768     if (!params.transport_format) {
 769         uint32_t scale;
 770         uint8_t mp4asc[32];
 771         uint32_t ascsize = sizeof(mp4asc);
 772         unsigned framelen = aacinfo.frameLength;
 773         if (sbr_mode)
 774             downsampled_timescale = 1;
 775         scale = sample_format->sample_rate >> downsampled_timescale;
 776         if ((m4af = m4af_create(M4AF_CODEC_MP4A, scale, &m4af_io,
 777                                 params.output_fp)) < 0)
 778             goto END;
 779         aacenc_mp4asc((aacenc_param_t*)&params, aacinfo.confBuf,
 780                       aacinfo.confSize, mp4asc, &ascsize);
 781         m4af_set_decoder_specific_info(m4af, 0, mp4asc, ascsize);
 782         m4af_set_fixed_frame_duration(m4af, 0,
 783                                       framelen >> downsampled_timescale);
 784         m4af_set_vbr_mode(m4af, 0, params.bitrate_mode);
 785         m4af_set_priming_mode(m4af, params.gapless_mode + 1);
 786         m4af_begin_write(m4af);
 787     }
 788     frame_count = encode(reader, encoder, aacinfo.frameLength,
 789                          params.output_fp, m4af, !params.silent);
 790     if (frame_count < 0)
 791         goto END;
 792     if (m4af) {
 793         uint32_t delay = aacinfo.encoderDelay;
 794         int64_t frames_read = pcm_get_position(reader);
 795         uint32_t padding = frame_count * aacinfo.frameLength
 796                             - frames_read - aacinfo.encoderDelay;
 797         m4af_set_priming(m4af, 0, delay >> downsampled_timescale,
 798                          padding >> downsampled_timescale);
 799         if (finalize_m4a(m4af, &params, encoder) < 0)
 800             goto END;
 801     }
 802     result = 0;
 803 END:
 804     if (reader) pcm_teardown(&reader);
 805     if (params.input_fp) fclose(params.input_fp);
 806     if (m4af) m4af_teardown(&m4af);
 807     if (params.output_fp) fclose(params.output_fp);
 808     if (encoder) aacEncClose(&encoder);
 809     if (output_filename) free(output_filename);
 810     if (params.tags.tag_table)
 811         aacenc_free_tag_store(&params.tags);
 812     if (params.source_tags.tag_table)
 813         aacenc_free_tag_store(&params.source_tags);
 814
 815     return result;
 816 }