compat.c

linux下mp3编解码程序

      {"TSIZ", OBSOLETE  /* Size [obsolete] */},
#line 129 "compat.gperf"
      {"WAS",  EQ(WOAS)  /* Official audio source webpage */},
#line 121 "compat.gperf"
      {"TXT",  EQ(TEXT)  /* Lyricist/text writer */},
#line 62 "compat.gperf"
      {"CNT",  EQ(PCNT)  /* Play counter */},
#line 100 "compat.gperf"
      {"TOF",  EQ(TOFN)  /* Original filename */},
#line 85 "compat.gperf"
      {"TCO",  TX(TCON)  /* Content type */},
#line 114 "compat.gperf"
      {"TRK",  EQ(TRCK)  /* Track number/position in set */},
#line 119 "compat.gperf"
      {"TT2",  EQ(TIT2)  /* Title/songname/content description */},
#line 93 "compat.gperf"
      {"TIM",  OBSOLETE  /* Time [obsolete] */},
#line 94 "compat.gperf"
      {"TIME", OBSOLETE  /* Time [obsolete] */},
#line 103 "compat.gperf"
      {"TORY", EQ(TDOR)  /* Original release year [obsolete] */},
#line 91 "compat.gperf"
      {"TEN",  EQ(TENC)  /* Encoded by */},
#line 118 "compat.gperf"
      {"TT1",  EQ(TIT1)  /* Content group description */},
#line 127 "compat.gperf"
      {"WAF",  EQ(WOAF)  /* Official audio file webpage */},
#line 75 "compat.gperf"
      {"PIC",  EQ(APIC)  /* Attached picture */},
#line 122 "compat.gperf"
      {"TXX",  EQ(TXXX)  /* User defined text information frame */},
#line 133 "compat.gperf"
      {"WXX",  EQ(WXXX)  /* User defined URL link frame */},
#line 86 "compat.gperf"
      {"TCON", TX(TCON)  /* Content type */},
#line 77 "compat.gperf"
      {"REV",  EQ(RVRB)  /* Reverb */},
#line 106 "compat.gperf"
      {"TP2",  EQ(TPE2)  /* Band/orchestra/accompaniment */},
#line 105 "compat.gperf"
      {"TP1",  EQ(TPE1)  /* Lead performer(s)/soloist(s) */},
#line 61 "compat.gperf"
      {"BUF",  EQ(RBUF)  /* Recommended buffer size */},
#line 70 "compat.gperf"
      {"IPL",  EQ(TIPL)  /* Involved people list */},
#line 69 "compat.gperf"
      {"GEO",  EQ(GEOB)  /* General encapsulated object */},
#line 72 "compat.gperf"
      {"LNK",  EQ(LINK)  /* Linked information */},
#line 71 "compat.gperf"
      {"IPLS", EQ(TIPL)  /* Involved people list */}
    };

  static const short lookup[] =
    {
      -1, -1, -1, -1, -1, -1,  0,  1,  2,  3,  4,  5,  6,  7,
       8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, -1,
      21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
      -1, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
      48, 49, -1, -1, 50, -1, 51, 52, -1, 53, 54, 55, 56, -1,
      57, 58, 59, 60, -1, 61, -1, 62, -1, -1, 63, -1, 64, -1,
      -1, 65, -1, 66, -1, -1, -1, -1, -1, 67, -1, 68, -1, 69,
      -1, 70, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
      -1, 71, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
      -1, 72
    };

  if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
    {
      register int key = hash (str, len);

      if (key <= MAX_HASH_VALUE && key >= 0)
        {
          register int index = lookup[key];

          if (index >= 0)
            {
              register const char *s = wordlist[index].id;

              if (*str == *s && !strncmp (str + 1, s + 1, len - 1) && s[len] == '\0')
                return &wordlist[index];
            }
        }
    }
  return 0;
}
#line 134 "compat.gperf"


static
int translate_TCON(struct id3_frame *frame, char const *oldid,
		   id3_byte_t const *data, id3_length_t length)
{
  id3_byte_t const *end;
  enum id3_field_textencoding encoding;
  id3_ucs4_t *string = 0, *ptr, *endptr;
  int result = 0;

  /* translate old TCON syntax into multiple strings */

  assert(frame->nfields == 2);

  encoding = ID3_FIELD_TEXTENCODING_ISO_8859_1;

  end = data + length;

  if (id3_field_parse(&frame->fields[0], &data, end - data, &encoding) == -1)
    goto fail;

  string = id3_parse_string(&data, end - data, encoding, 0);
  if (string == 0)
    goto fail;

  ptr = string;
  while (*ptr == '(') {
    if (*++ptr == '(')
      break;

    endptr = ptr;
    while (*endptr && *endptr != ')')
      ++endptr;

    if (*endptr)
      *endptr++ = 0;

    if (id3_field_addstring(&frame->fields[1], ptr) == -1)
      goto fail;

    ptr = endptr;
  }

  if (*ptr && id3_field_addstring(&frame->fields[1], ptr) == -1)
    goto fail;

  if (0) {
  fail:
    result = -1;
  }

  if (string)
    free(string);

  return result;
}

/*
 * NAME:	compat->fixup()
 * DESCRIPTION:	finish compatibility translations
 */
int id3_compat_fixup(struct id3_tag *tag)
{
  struct id3_frame *frame;
  unsigned int index;
  id3_ucs4_t timestamp[17] = { 0 };
  int result = 0;

  /* create a TDRC frame from obsolete TYER/TDAT/TIME frames */

  /*
   * TYE/TYER: YYYY
   * TDA/TDAT: DDMM
   * TIM/TIME: HHMM
   *
   * TDRC: yyyy-MM-ddTHH:mm
   */

  index = 0;
  while ((frame = id3_tag_findframe(tag, ID3_FRAME_OBSOLETE, index++))) {
    char const *id;
    id3_byte_t const *data, *end;
    id3_length_t length;
    enum id3_field_textencoding encoding;
    id3_ucs4_t *string;

    id = id3_field_getframeid(&frame->fields[0]);
    assert(id);

    if (strcmp(id, "TYER") != 0 && strcmp(id, "YTYE") != 0 &&
	strcmp(id, "TDAT") != 0 && strcmp(id, "YTDA") != 0 &&
	strcmp(id, "TIME") != 0 && strcmp(id, "YTIM") != 0)
      continue;

    data = id3_field_getbinarydata(&frame->fields[1], &length);
    assert(data);

    if (length < 1)
      continue;

    end = data + length;

    encoding = id3_parse_uint(&data, 1);
    string   = id3_parse_string(&data, end - data, encoding, 0);

    if (id3_ucs4_length(string) < 4) {
      free(string);
      continue;
    }

    if (strcmp(id, "TYER") == 0 ||
	strcmp(id, "YTYE") == 0) {
      timestamp[0] = string[0];
      timestamp[1] = string[1];
      timestamp[2] = string[2];
      timestamp[3] = string[3];
    }
    else if (strcmp(id, "TDAT") == 0 ||
	     strcmp(id, "YTDA") == 0) {
      timestamp[4] = '-';
      timestamp[5] = string[2];
      timestamp[6] = string[3];
      timestamp[7] = '-';
      timestamp[8] = string[0];
      timestamp[9] = string[1];
    }
    else {  /* TIME or YTIM */
      timestamp[10] = 'T';
      timestamp[11] = string[0];
      timestamp[12] = string[1];
      timestamp[13] = ':';
      timestamp[14] = string[2];
      timestamp[15] = string[3];
    }

    free(string);
  }

  if (timestamp[0]) {
    id3_ucs4_t *strings;

    frame = id3_frame_new("TDRC");
    if (frame == 0)
      goto fail;

    strings = timestamp;

    if (id3_field_settextencoding(&frame->fields[0],
				  ID3_FIELD_TEXTENCODING_ISO_8859_1) == -1 ||
	id3_field_setstrings(&frame->fields[1], 1, &strings) == -1 ||
	id3_tag_attachframe(tag, frame) == -1) {
      id3_frame_delete(frame);
      goto fail;
    }
  }

  if (0) {
  fail:
    result = -1;
  }

  return result;
}