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src/flac.c  view on Meta::CPAN

      sprintf(decimal, "%"PRIu64, leadin);
      av_push( cue, newSVpvf("REM FLAC__lead-in %s\n", decimal) );

      // XXX is tracknum right here?
      sprintf(decimal, "%"PRIu64, track_offset);
      av_push( cue, newSVpvf("REM FLAC__lead-out %u %s\n", tracknum, decimal) );
    }
  }

  my_hv_store( flac->tags, "CUESHEET_BLOCK", newRV_noinc( (SV *)cue ) );
}

int
_flac_parse_picture(flacinfo *flac)
{
  AV *pictures;
  HV *picture;
  int ret = 1;
  uint32_t pic_length;

  picture = _decode_flac_picture(flac->infile, flac->buf, &pic_length);
  if ( !picture ) {
    PerlIO_printf(PerlIO_stderr(), "Invalid FLAC file: %s, bad picture block\n", flac->file);
    ret = 0;
    goto out;
  }

  // Skip past pic data if necessary
  if ( _env_true("AUDIO_SCAN_NO_ARTWORK") ) {
    my_hv_store( picture, "offset", newSVuv(flac->audio_offset - pic_length) );
    _flac_skip(flac, pic_length);
  }
  else {
    buffer_consume(flac->buf, pic_length);
  }

  DEBUG_TRACE("  found picture of length %d\n", pic_length);

  if ( my_hv_exists(flac->tags, "ALLPICTURES") ) {
    SV **entry = my_hv_fetch(flac->tags, "ALLPICTURES");
    if (entry != NULL) {
      pictures = (AV *)SvRV(*entry);
      av_push( pictures, newRV_noinc( (SV *)picture ) );
    }
  }
  else {
    pictures = newAV();

    av_push( pictures, newRV_noinc( (SV *)picture ) );

    my_hv_store( flac->tags, "ALLPICTURES", newRV_noinc( (SV *)pictures ) );
  }

out:
  return ret;
}

/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
uint8_t const _flac_crc8_table[256] = {
  0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
  0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
  0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
  0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
  0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
  0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
  0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
  0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
  0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
  0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
  0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
  0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
  0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
  0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
  0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
  0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
  0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
  0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
  0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
  0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
  0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
  0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
  0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
  0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
  0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
  0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
  0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
  0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
  0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
  0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
  0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
  0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};

uint8_t
_flac_crc8(const unsigned char *buf, unsigned len)
{
  uint8_t crc = 0;

  while(len--)
    crc = _flac_crc8_table[crc ^ *buf++];

  return crc;
}

int
_flac_read_utf8_uint64(unsigned char *raw, uint64_t *val, uint8_t *rawlen)
{
  uint64_t v = 0;
  uint32_t x;
  unsigned i;

  x = raw[(*rawlen)++];

  if(!(x & 0x80)) { /* 0xxxxxxx */
    v = x;
    i = 0;
  }
  else if(x & 0xC0 && !(x & 0x20)) { /* 110xxxxx */
    v = x & 0x1F;
    i = 1;
  }