diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/ID3/module.audio.ac3.php --- a/wp/wp-includes/ID3/module.audio.ac3.php Tue Jun 09 11:14:17 2015 +0000 +++ b/wp/wp-includes/ID3/module.audio.ac3.php Mon Oct 14 17:39:30 2019 +0200 @@ -20,7 +20,7 @@ private $AC3header = array(); private $BSIoffset = 0; - const syncword = "\x0B\x77"; + const syncword = 0x0B77; public function Analyze() { $info = &$this->getid3->info; @@ -55,54 +55,390 @@ // } /* end of syncinfo */ $this->fseek($info['avdataoffset']); - $this->AC3header['syncinfo'] = $this->fread(5); + $tempAC3header = $this->fread(100); // should be enough to cover all data, there are some variable-length fields...? + $this->AC3header['syncinfo'] = getid3_lib::BigEndian2Int(substr($tempAC3header, 0, 2)); + $this->AC3header['bsi'] = getid3_lib::BigEndian2Bin(substr($tempAC3header, 2)); + $thisfile_ac3_raw_bsi['bsid'] = (getid3_lib::LittleEndian2Int(substr($tempAC3header, 5, 1)) & 0xF8) >> 3; // AC3 and E-AC3 put the "bsid" version identifier in the same place, but unfortnately the 4 bytes between the syncword and the version identifier are interpreted differently, so grab it here so the following code structure can make sense + unset($tempAC3header); - if (strpos($this->AC3header['syncinfo'], self::syncword) === 0) { - $thisfile_ac3_raw['synchinfo']['synchword'] = self::syncword; - $offset = 2; - } else { + if ($this->AC3header['syncinfo'] !== self::syncword) { if (!$this->isDependencyFor('matroska')) { unset($info['fileformat'], $info['ac3']); - return $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($this->AC3header['syncinfo'], 0, 2)).'"'); + return $this->error('Expecting "'.dechex(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.dechex($this->AC3header['syncinfo']).'"'); } - $offset = 0; - $this->fseek(-2, SEEK_CUR); } $info['audio']['dataformat'] = 'ac3'; $info['audio']['bitrate_mode'] = 'cbr'; $info['audio']['lossless'] = false; - $thisfile_ac3_raw['synchinfo']['crc1'] = getid3_lib::LittleEndian2Int(substr($this->AC3header['syncinfo'], $offset, 2)); - $ac3_synchinfo_fscod_frmsizecod = getid3_lib::LittleEndian2Int(substr($this->AC3header['syncinfo'], ($offset + 2), 1)); - $thisfile_ac3_raw['synchinfo']['fscod'] = ($ac3_synchinfo_fscod_frmsizecod & 0xC0) >> 6; - $thisfile_ac3_raw['synchinfo']['frmsizecod'] = ($ac3_synchinfo_fscod_frmsizecod & 0x3F); + if ($thisfile_ac3_raw_bsi['bsid'] <= 8) { + + $thisfile_ac3_raw_bsi['crc1'] = getid3_lib::Bin2Dec($this->readHeaderBSI(16)); + $thisfile_ac3_raw_bsi['fscod'] = $this->readHeaderBSI(2); // 5.4.1.3 + $thisfile_ac3_raw_bsi['frmsizecod'] = $this->readHeaderBSI(6); // 5.4.1.4 + if ($thisfile_ac3_raw_bsi['frmsizecod'] > 37) { // binary: 100101 - see Table 5.18 Frame Size Code Table (1 word = 16 bits) + $this->warning('Unexpected ac3.bsi.frmsizecod value: '.$thisfile_ac3_raw_bsi['frmsizecod'].', bitrate not set correctly'); + } + + $thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended + $thisfile_ac3_raw_bsi['bsmod'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3); + + if ($thisfile_ac3_raw_bsi['acmod'] & 0x01) { + // If the lsb of acmod is a 1, center channel is in use and cmixlev follows in the bit stream. + $thisfile_ac3_raw_bsi['cmixlev'] = $this->readHeaderBSI(2); + $thisfile_ac3['center_mix_level'] = self::centerMixLevelLookup($thisfile_ac3_raw_bsi['cmixlev']); + } + + if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) { + // If the msb of acmod is a 1, surround channels are in use and surmixlev follows in the bit stream. + $thisfile_ac3_raw_bsi['surmixlev'] = $this->readHeaderBSI(2); + $thisfile_ac3['surround_mix_level'] = self::surroundMixLevelLookup($thisfile_ac3_raw_bsi['surmixlev']); + } + + if ($thisfile_ac3_raw_bsi['acmod'] == 0x02) { + // When operating in the two channel mode, this 2-bit code indicates whether or not the program has been encoded in Dolby Surround. + $thisfile_ac3_raw_bsi['dsurmod'] = $this->readHeaderBSI(2); + $thisfile_ac3['dolby_surround_mode'] = self::dolbySurroundModeLookup($thisfile_ac3_raw_bsi['dsurmod']); + } + + $thisfile_ac3_raw_bsi['flags']['lfeon'] = (bool) $this->readHeaderBSI(1); + + // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. + // The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent. + $thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5); // 5.4.2.8 dialnorm: Dialogue Normalization, 5 Bits + + $thisfile_ac3_raw_bsi['flags']['compr'] = (bool) $this->readHeaderBSI(1); // 5.4.2.9 compre: Compression Gain Word Exists, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['compr']) { + $thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8); // 5.4.2.10 compr: Compression Gain Word, 8 Bits + $thisfile_ac3['heavy_compression'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr']); + } + + $thisfile_ac3_raw_bsi['flags']['langcod'] = (bool) $this->readHeaderBSI(1); // 5.4.2.11 langcode: Language Code Exists, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['langcod']) { + $thisfile_ac3_raw_bsi['langcod'] = $this->readHeaderBSI(8); // 5.4.2.12 langcod: Language Code, 8 Bits + } + + $thisfile_ac3_raw_bsi['flags']['audprodinfo'] = (bool) $this->readHeaderBSI(1); // 5.4.2.13 audprodie: Audio Production Information Exists, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['audprodinfo']) { + $thisfile_ac3_raw_bsi['mixlevel'] = $this->readHeaderBSI(5); // 5.4.2.14 mixlevel: Mixing Level, 5 Bits + $thisfile_ac3_raw_bsi['roomtyp'] = $this->readHeaderBSI(2); // 5.4.2.15 roomtyp: Room Type, 2 Bits + + $thisfile_ac3['mixing_level'] = (80 + $thisfile_ac3_raw_bsi['mixlevel']).'dB'; + $thisfile_ac3['room_type'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp']); + } + + + $thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5); // 5.4.2.16 dialnorm2: Dialogue Normalization, ch2, 5 Bits + $thisfile_ac3['dialogue_normalization2'] = '-'.$thisfile_ac3_raw_bsi['dialnorm2'].'dB'; // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent. + + $thisfile_ac3_raw_bsi['flags']['compr2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.17 compr2e: Compression Gain Word Exists, ch2, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['compr2']) { + $thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8); // 5.4.2.18 compr2: Compression Gain Word, ch2, 8 Bits + $thisfile_ac3['heavy_compression2'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr2']); + } + + $thisfile_ac3_raw_bsi['flags']['langcod2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.19 langcod2e: Language Code Exists, ch2, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['langcod2']) { + $thisfile_ac3_raw_bsi['langcod2'] = $this->readHeaderBSI(8); // 5.4.2.20 langcod2: Language Code, ch2, 8 Bits + } + + $thisfile_ac3_raw_bsi['flags']['audprodinfo2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.21 audprodi2e: Audio Production Information Exists, ch2, 1 Bit + if ($thisfile_ac3_raw_bsi['flags']['audprodinfo2']) { + $thisfile_ac3_raw_bsi['mixlevel2'] = $this->readHeaderBSI(5); // 5.4.2.22 mixlevel2: Mixing Level, ch2, 5 Bits + $thisfile_ac3_raw_bsi['roomtyp2'] = $this->readHeaderBSI(2); // 5.4.2.23 roomtyp2: Room Type, ch2, 2 Bits + + $thisfile_ac3['mixing_level2'] = (80 + $thisfile_ac3_raw_bsi['mixlevel2']).'dB'; + $thisfile_ac3['room_type2'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp2']); + } + + $thisfile_ac3_raw_bsi['copyright'] = (bool) $this->readHeaderBSI(1); // 5.4.2.24 copyrightb: Copyright Bit, 1 Bit + + $thisfile_ac3_raw_bsi['original'] = (bool) $this->readHeaderBSI(1); // 5.4.2.25 origbs: Original Bit Stream, 1 Bit + + $thisfile_ac3_raw_bsi['flags']['timecod1'] = $this->readHeaderBSI(2); // 5.4.2.26 timecod1e, timcode2e: Time Code (first and second) Halves Exist, 2 Bits + if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x01) { + $thisfile_ac3_raw_bsi['timecod1'] = $this->readHeaderBSI(14); // 5.4.2.27 timecod1: Time code first half, 14 bits + $thisfile_ac3['timecode1'] = 0; + $thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x3E00) >> 9) * 3600; // The first 5 bits of this 14-bit field represent the time in hours, with valid values of 0�23 + $thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x01F8) >> 3) * 60; // The next 6 bits represent the time in minutes, with valid values of 0�59 + $thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x0003) >> 0) * 8; // The final 3 bits represents the time in 8 second increments, with valid values of 0�7 (representing 0, 8, 16, ... 56 seconds) + } + if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x02) { + $thisfile_ac3_raw_bsi['timecod2'] = $this->readHeaderBSI(14); // 5.4.2.28 timecod2: Time code second half, 14 bits + $thisfile_ac3['timecode2'] = 0; + $thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x3800) >> 11) * 1; // The first 3 bits of this 14-bit field represent the time in seconds, with valid values from 0�7 (representing 0-7 seconds) + $thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x07C0) >> 6) * (1 / 30); // The next 5 bits represents the time in frames, with valid values from 0�29 (one frame = 1/30th of a second) + $thisfile_ac3['timecode2'] += (($thisfile_ac3_raw_bsi['timecod2'] & 0x003F) >> 0) * ((1 / 30) / 60); // The final 6 bits represents fractions of 1/64 of a frame, with valid values from 0�63 + } + + $thisfile_ac3_raw_bsi['flags']['addbsi'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['addbsi']) { + $thisfile_ac3_raw_bsi['addbsi_length'] = $this->readHeaderBSI(6) + 1; // This 6-bit code, which exists only if addbside is a 1, indicates the length in bytes of additional bit stream information. The valid range of addbsil is 0�63, indicating 1�64 additional bytes, respectively. + + $this->AC3header['bsi'] .= getid3_lib::BigEndian2Bin($this->fread($thisfile_ac3_raw_bsi['addbsi_length'])); + + $thisfile_ac3_raw_bsi['addbsi_data'] = substr($this->AC3header['bsi'], $this->BSIoffset, $thisfile_ac3_raw_bsi['addbsi_length'] * 8); + $this->BSIoffset += $thisfile_ac3_raw_bsi['addbsi_length'] * 8; + } + + + } elseif ($thisfile_ac3_raw_bsi['bsid'] <= 16) { // E-AC3 + + +$this->error('E-AC3 parsing is incomplete and experimental in this version of getID3 ('.$this->getid3->version().'). Notably the bitrate calculations are wrong -- value might (or not) be correct, but it is not calculated correctly. Email info@getid3.org if you know how to calculate EAC3 bitrate correctly.'); + $info['audio']['dataformat'] = 'eac3'; - $thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup($thisfile_ac3_raw['synchinfo']['fscod']); - if ($thisfile_ac3_raw['synchinfo']['fscod'] <= 3) { - $info['audio']['sample_rate'] = $thisfile_ac3['sample_rate']; + $thisfile_ac3_raw_bsi['strmtyp'] = $this->readHeaderBSI(2); + $thisfile_ac3_raw_bsi['substreamid'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['frmsiz'] = $this->readHeaderBSI(11); + $thisfile_ac3_raw_bsi['fscod'] = $this->readHeaderBSI(2); + if ($thisfile_ac3_raw_bsi['fscod'] == 3) { + $thisfile_ac3_raw_bsi['fscod2'] = $this->readHeaderBSI(2); + $thisfile_ac3_raw_bsi['numblkscod'] = 3; // six blocks per syncframe + } else { + $thisfile_ac3_raw_bsi['numblkscod'] = $this->readHeaderBSI(2); + } + $thisfile_ac3['bsi']['blocks_per_sync_frame'] = self::blocksPerSyncFrame($thisfile_ac3_raw_bsi['numblkscod']); + $thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['flags']['lfeon'] = (bool) $this->readHeaderBSI(1); + $thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended + $thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5); + $thisfile_ac3_raw_bsi['flags']['compr'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['compr']) { + $thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8); + } + if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value) + $thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5); + $thisfile_ac3_raw_bsi['flags']['compr2'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['compr2']) { + $thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8); + } + } + if ($thisfile_ac3_raw_bsi['strmtyp'] == 1) { // if dependent stream + $thisfile_ac3_raw_bsi['flags']['chanmap'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['chanmap']) { + $thisfile_ac3_raw_bsi['chanmap'] = $this->readHeaderBSI(8); + } + } + $thisfile_ac3_raw_bsi['flags']['mixmdat'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['mixmdat']) { // Mixing metadata + if ($thisfile_ac3_raw_bsi['acmod'] > 2) { // if more than 2 channels + $thisfile_ac3_raw_bsi['dmixmod'] = $this->readHeaderBSI(2); + } + if (($thisfile_ac3_raw_bsi['acmod'] & 0x01) && ($thisfile_ac3_raw_bsi['acmod'] > 2)) { // if three front channels exist + $thisfile_ac3_raw_bsi['ltrtcmixlev'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['lorocmixlev'] = $this->readHeaderBSI(3); + } + if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) { // if a surround channel exists + $thisfile_ac3_raw_bsi['ltrtsurmixlev'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['lorosurmixlev'] = $this->readHeaderBSI(3); + } + if ($thisfile_ac3_raw_bsi['flags']['lfeon']) { // if the LFE channel exists + $thisfile_ac3_raw_bsi['flags']['lfemixlevcod'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['lfemixlevcod']) { + $thisfile_ac3_raw_bsi['lfemixlevcod'] = $this->readHeaderBSI(5); + } + } + if ($thisfile_ac3_raw_bsi['strmtyp'] == 0) { // if independent stream + $thisfile_ac3_raw_bsi['flags']['pgmscl'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['pgmscl']) { + $thisfile_ac3_raw_bsi['pgmscl'] = $this->readHeaderBSI(6); + } + if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value) + $thisfile_ac3_raw_bsi['flags']['pgmscl2'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['pgmscl2']) { + $thisfile_ac3_raw_bsi['pgmscl2'] = $this->readHeaderBSI(6); + } + } + $thisfile_ac3_raw_bsi['flags']['extpgmscl'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['extpgmscl']) { + $thisfile_ac3_raw_bsi['extpgmscl'] = $this->readHeaderBSI(6); + } + $thisfile_ac3_raw_bsi['mixdef'] = $this->readHeaderBSI(2); + if ($thisfile_ac3_raw_bsi['mixdef'] == 1) { // mixing option 2 + $thisfile_ac3_raw_bsi['premixcmpsel'] = (bool) $this->readHeaderBSI(1); + $thisfile_ac3_raw_bsi['drcsrc'] = (bool) $this->readHeaderBSI(1); + $thisfile_ac3_raw_bsi['premixcmpscl'] = $this->readHeaderBSI(3); + } elseif ($thisfile_ac3_raw_bsi['mixdef'] == 2) { // mixing option 3 + $thisfile_ac3_raw_bsi['mixdata'] = $this->readHeaderBSI(12); + } elseif ($thisfile_ac3_raw_bsi['mixdef'] == 3) { // mixing option 4 + $mixdefbitsread = 0; + $thisfile_ac3_raw_bsi['mixdeflen'] = $this->readHeaderBSI(5); $mixdefbitsread += 5; + $thisfile_ac3_raw_bsi['flags']['mixdata2'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['mixdata2']) { + $thisfile_ac3_raw_bsi['premixcmpsel'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + $thisfile_ac3_raw_bsi['drcsrc'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + $thisfile_ac3_raw_bsi['premixcmpscl'] = $this->readHeaderBSI(3); $mixdefbitsread += 3; + $thisfile_ac3_raw_bsi['flags']['extpgmlscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmlscl']) { + $thisfile_ac3_raw_bsi['extpgmlscl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['extpgmcscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmcscl']) { + $thisfile_ac3_raw_bsi['extpgmcscl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['extpgmrscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmrscl']) { + $thisfile_ac3_raw_bsi['extpgmrscl'] = $this->readHeaderBSI(4); + } + $thisfile_ac3_raw_bsi['flags']['extpgmlsscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmlsscl']) { + $thisfile_ac3_raw_bsi['extpgmlsscl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['extpgmrsscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmrsscl']) { + $thisfile_ac3_raw_bsi['extpgmrsscl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['extpgmlfescl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmlfescl']) { + $thisfile_ac3_raw_bsi['extpgmlfescl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['dmixscl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['dmixscl']) { + $thisfile_ac3_raw_bsi['dmixscl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['addch'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['addch']) { + $thisfile_ac3_raw_bsi['flags']['extpgmaux1scl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmaux1scl']) { + $thisfile_ac3_raw_bsi['extpgmaux1scl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + $thisfile_ac3_raw_bsi['flags']['extpgmaux2scl'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['extpgmaux2scl']) { + $thisfile_ac3_raw_bsi['extpgmaux2scl'] = $this->readHeaderBSI(4); $mixdefbitsread += 4; + } + } + } + $thisfile_ac3_raw_bsi['flags']['mixdata3'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['mixdata3']) { + $thisfile_ac3_raw_bsi['spchdat'] = $this->readHeaderBSI(5); $mixdefbitsread += 5; + $thisfile_ac3_raw_bsi['flags']['addspchdat'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['addspchdat']) { + $thisfile_ac3_raw_bsi['spchdat1'] = $this->readHeaderBSI(5); $mixdefbitsread += 5; + $thisfile_ac3_raw_bsi['spchan1att'] = $this->readHeaderBSI(2); $mixdefbitsread += 2; + $thisfile_ac3_raw_bsi['flags']['addspchdat1'] = (bool) $this->readHeaderBSI(1); $mixdefbitsread += 1; + if ($thisfile_ac3_raw_bsi['flags']['addspchdat1']) { + $thisfile_ac3_raw_bsi['spchdat2'] = $this->readHeaderBSI(5); $mixdefbitsread += 5; + $thisfile_ac3_raw_bsi['spchan2att'] = $this->readHeaderBSI(3); $mixdefbitsread += 3; + } + } + } + $mixdata_bits = (8 * ($thisfile_ac3_raw_bsi['mixdeflen'] + 2)) - $mixdefbitsread; + $mixdata_fill = (($mixdata_bits % 8) ? 8 - ($mixdata_bits % 8) : 0); + $thisfile_ac3_raw_bsi['mixdata'] = $this->readHeaderBSI($mixdata_bits); + $thisfile_ac3_raw_bsi['mixdatafill'] = $this->readHeaderBSI($mixdata_fill); + unset($mixdefbitsread, $mixdata_bits, $mixdata_fill); + } + if ($thisfile_ac3_raw_bsi['acmod'] < 2) { // if mono or dual mono source + $thisfile_ac3_raw_bsi['flags']['paninfo'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['paninfo']) { + $thisfile_ac3_raw_bsi['panmean'] = $this->readHeaderBSI(8); + $thisfile_ac3_raw_bsi['paninfo'] = $this->readHeaderBSI(6); + } + if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value) + $thisfile_ac3_raw_bsi['flags']['paninfo2'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['paninfo2']) { + $thisfile_ac3_raw_bsi['panmean2'] = $this->readHeaderBSI(8); + $thisfile_ac3_raw_bsi['paninfo2'] = $this->readHeaderBSI(6); + } + } + } + $thisfile_ac3_raw_bsi['flags']['frmmixcfginfo'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['frmmixcfginfo']) { // mixing configuration information + if ($thisfile_ac3_raw_bsi['numblkscod'] == 0) { + $thisfile_ac3_raw_bsi['blkmixcfginfo'][0] = $this->readHeaderBSI(5); + } else { + for ($blk = 0; $blk < $thisfile_ac3_raw_bsi['numblkscod']; $blk++) { + $thisfile_ac3_raw_bsi['flags']['blkmixcfginfo'.$blk] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['blkmixcfginfo'.$blk]) { // mixing configuration information + $thisfile_ac3_raw_bsi['blkmixcfginfo'][$blk] = $this->readHeaderBSI(5); + } + } + } + } + } + } + $thisfile_ac3_raw_bsi['flags']['infomdat'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['infomdat']) { // Informational metadata + $thisfile_ac3_raw_bsi['bsmod'] = $this->readHeaderBSI(3); + $thisfile_ac3_raw_bsi['flags']['copyrightb'] = (bool) $this->readHeaderBSI(1); + $thisfile_ac3_raw_bsi['flags']['origbs'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['acmod'] == 2) { // if in 2/0 mode + $thisfile_ac3_raw_bsi['dsurmod'] = $this->readHeaderBSI(2); + $thisfile_ac3_raw_bsi['dheadphonmod'] = $this->readHeaderBSI(2); + } + if ($thisfile_ac3_raw_bsi['acmod'] >= 6) { // if both surround channels exist + $thisfile_ac3_raw_bsi['dsurexmod'] = $this->readHeaderBSI(2); + } + $thisfile_ac3_raw_bsi['flags']['audprodi'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['audprodi']) { + $thisfile_ac3_raw_bsi['mixlevel'] = $this->readHeaderBSI(5); + $thisfile_ac3_raw_bsi['roomtyp'] = $this->readHeaderBSI(2); + $thisfile_ac3_raw_bsi['flags']['adconvtyp'] = (bool) $this->readHeaderBSI(1); + } + if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value) + $thisfile_ac3_raw_bsi['flags']['audprodi2'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['audprodi2']) { + $thisfile_ac3_raw_bsi['mixlevel2'] = $this->readHeaderBSI(5); + $thisfile_ac3_raw_bsi['roomtyp2'] = $this->readHeaderBSI(2); + $thisfile_ac3_raw_bsi['flags']['adconvtyp2'] = (bool) $this->readHeaderBSI(1); + } + } + if ($thisfile_ac3_raw_bsi['fscod'] < 3) { // if not half sample rate + $thisfile_ac3_raw_bsi['flags']['sourcefscod'] = (bool) $this->readHeaderBSI(1); + } + } + if (($thisfile_ac3_raw_bsi['strmtyp'] == 0) && ($thisfile_ac3_raw_bsi['numblkscod'] != 3)) { // if both surround channels exist + $thisfile_ac3_raw_bsi['flags']['convsync'] = (bool) $this->readHeaderBSI(1); + } + if ($thisfile_ac3_raw_bsi['strmtyp'] == 2) { // if bit stream converted from AC-3 + if ($thisfile_ac3_raw_bsi['numblkscod'] != 3) { // 6 blocks per syncframe + $thisfile_ac3_raw_bsi['flags']['blkid'] = 1; + } else { + $thisfile_ac3_raw_bsi['flags']['blkid'] = (bool) $this->readHeaderBSI(1); + } + if ($thisfile_ac3_raw_bsi['flags']['blkid']) { + $thisfile_ac3_raw_bsi['frmsizecod'] = $this->readHeaderBSI(6); + } + } + $thisfile_ac3_raw_bsi['flags']['addbsi'] = (bool) $this->readHeaderBSI(1); + if ($thisfile_ac3_raw_bsi['flags']['addbsi']) { + $thisfile_ac3_raw_bsi['addbsil'] = $this->readHeaderBSI(6); + $thisfile_ac3_raw_bsi['addbsi'] = $this->readHeaderBSI(($thisfile_ac3_raw_bsi['addbsil'] + 1) * 8); + } + + } else { + + $this->error('Bit stream identification is version '.$thisfile_ac3_raw_bsi['bsid'].', but getID3() only understands up to version 16. Please submit a support ticket with a sample file.'); + unset($info['ac3']); + return false; + } - $thisfile_ac3['frame_length'] = self::frameSizeLookup($thisfile_ac3_raw['synchinfo']['frmsizecod'], $thisfile_ac3_raw['synchinfo']['fscod']); - $thisfile_ac3['bitrate'] = self::bitrateLookup($thisfile_ac3_raw['synchinfo']['frmsizecod']); + if (isset($thisfile_ac3_raw_bsi['fscod2'])) { + $thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup2($thisfile_ac3_raw_bsi['fscod2']); + } else { + $thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup($thisfile_ac3_raw_bsi['fscod']); + } + if ($thisfile_ac3_raw_bsi['fscod'] <= 3) { + $info['audio']['sample_rate'] = $thisfile_ac3['sample_rate']; + } else { + $this->warning('Unexpected ac3.bsi.fscod value: '.$thisfile_ac3_raw_bsi['fscod']); + } + if (isset($thisfile_ac3_raw_bsi['frmsizecod'])) { + $thisfile_ac3['frame_length'] = self::frameSizeLookup($thisfile_ac3_raw_bsi['frmsizecod'], $thisfile_ac3_raw_bsi['fscod']); + $thisfile_ac3['bitrate'] = self::bitrateLookup($thisfile_ac3_raw_bsi['frmsizecod']); + } elseif (!empty($thisfile_ac3_raw_bsi['frmsiz'])) { +// this isn't right, but it's (usually) close, roughly 5% less than it should be. +// but WHERE is the actual bitrate value stored in EAC3?? email info@getid3.org if you know! + $thisfile_ac3['bitrate'] = ($thisfile_ac3_raw_bsi['frmsiz'] + 1) * 16 * 30; // The frmsiz field shall contain a value one less than the overall size of the coded syncframe in 16-bit words. That is, this field may assume a value ranging from 0 to 2047, and these values correspond to syncframe sizes ranging from 1 to 2048. +// kludge-fix to make it approximately the expected value, still not "right": +$thisfile_ac3['bitrate'] = round(($thisfile_ac3['bitrate'] * 1.05) / 16000) * 16000; + } $info['audio']['bitrate'] = $thisfile_ac3['bitrate']; - $this->AC3header['bsi'] = getid3_lib::BigEndian2Bin($this->fread(15)); - $ac3_bsi_offset = 0; - - $thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5); - if ($thisfile_ac3_raw_bsi['bsid'] > 8) { - // Decoders which can decode version 8 will thus be able to decode version numbers less than 8. - // If this standard is extended by the addition of additional elements or features, a value of bsid greater than 8 will be used. - // Decoders built to this version of the standard will not be able to decode versions with bsid greater than 8. - $this->error('Bit stream identification is version '.$thisfile_ac3_raw_bsi['bsid'].', but getID3() only understands up to version 8'); - unset($info['ac3']); - return false; - } - - $thisfile_ac3_raw_bsi['bsmod'] = $this->readHeaderBSI(3); - $thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3); - $thisfile_ac3['service_type'] = self::serviceTypeLookup($thisfile_ac3_raw_bsi['bsmod'], $thisfile_ac3_raw_bsi['acmod']); $ac3_coding_mode = self::audioCodingModeLookup($thisfile_ac3_raw_bsi['acmod']); foreach($ac3_coding_mode as $key => $value) { @@ -123,114 +459,14 @@ } $info['audio']['channels'] = $thisfile_ac3['num_channels']; - if ($thisfile_ac3_raw_bsi['acmod'] & 0x01) { - // If the lsb of acmod is a 1, center channel is in use and cmixlev follows in the bit stream. - $thisfile_ac3_raw_bsi['cmixlev'] = $this->readHeaderBSI(2); - $thisfile_ac3['center_mix_level'] = self::centerMixLevelLookup($thisfile_ac3_raw_bsi['cmixlev']); - } - - if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) { - // If the msb of acmod is a 1, surround channels are in use and surmixlev follows in the bit stream. - $thisfile_ac3_raw_bsi['surmixlev'] = $this->readHeaderBSI(2); - $thisfile_ac3['surround_mix_level'] = self::surroundMixLevelLookup($thisfile_ac3_raw_bsi['surmixlev']); - } - - if ($thisfile_ac3_raw_bsi['acmod'] == 0x02) { - // When operating in the two channel mode, this 2-bit code indicates whether or not the program has been encoded in Dolby Surround. - $thisfile_ac3_raw_bsi['dsurmod'] = $this->readHeaderBSI(2); - $thisfile_ac3['dolby_surround_mode'] = self::dolbySurroundModeLookup($thisfile_ac3_raw_bsi['dsurmod']); - } - - $thisfile_ac3_raw_bsi['lfeon'] = (bool) $this->readHeaderBSI(1); - $thisfile_ac3['lfe_enabled'] = $thisfile_ac3_raw_bsi['lfeon']; - if ($thisfile_ac3_raw_bsi['lfeon']) { - //$info['audio']['channels']++; + $thisfile_ac3['lfe_enabled'] = $thisfile_ac3_raw_bsi['flags']['lfeon']; + if ($thisfile_ac3_raw_bsi['flags']['lfeon']) { $info['audio']['channels'] .= '.1'; } - $thisfile_ac3['channels_enabled'] = self::channelsEnabledLookup($thisfile_ac3_raw_bsi['acmod'], $thisfile_ac3_raw_bsi['lfeon']); - - // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. - // The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent. - $thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5); + $thisfile_ac3['channels_enabled'] = self::channelsEnabledLookup($thisfile_ac3_raw_bsi['acmod'], $thisfile_ac3_raw_bsi['flags']['lfeon']); $thisfile_ac3['dialogue_normalization'] = '-'.$thisfile_ac3_raw_bsi['dialnorm'].'dB'; - $thisfile_ac3_raw_bsi['compre_flag'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['compre_flag']) { - $thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8); - $thisfile_ac3['heavy_compression'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr']); - } - - $thisfile_ac3_raw_bsi['langcode_flag'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['langcode_flag']) { - $thisfile_ac3_raw_bsi['langcod'] = $this->readHeaderBSI(8); - } - - $thisfile_ac3_raw_bsi['audprodie'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['audprodie']) { - $thisfile_ac3_raw_bsi['mixlevel'] = $this->readHeaderBSI(5); - $thisfile_ac3_raw_bsi['roomtyp'] = $this->readHeaderBSI(2); - - $thisfile_ac3['mixing_level'] = (80 + $thisfile_ac3_raw_bsi['mixlevel']).'dB'; - $thisfile_ac3['room_type'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp']); - } - - if ($thisfile_ac3_raw_bsi['acmod'] == 0x00) { - // If acmod is 0, then two completely independent program channels (dual mono) - // are encoded into the bit stream, and are referenced as Ch1, Ch2. In this case, - // a number of additional items are present in BSI or audblk to fully describe Ch2. - - // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. - // The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent. - $thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5); - $thisfile_ac3['dialogue_normalization2'] = '-'.$thisfile_ac3_raw_bsi['dialnorm2'].'dB'; - - $thisfile_ac3_raw_bsi['compre_flag2'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['compre_flag2']) { - $thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8); - $thisfile_ac3['heavy_compression2'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr2']); - } - - $thisfile_ac3_raw_bsi['langcode_flag2'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['langcode_flag2']) { - $thisfile_ac3_raw_bsi['langcod2'] = $this->readHeaderBSI(8); - } - - $thisfile_ac3_raw_bsi['audprodie2'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['audprodie2']) { - $thisfile_ac3_raw_bsi['mixlevel2'] = $this->readHeaderBSI(5); - $thisfile_ac3_raw_bsi['roomtyp2'] = $this->readHeaderBSI(2); - - $thisfile_ac3['mixing_level2'] = (80 + $thisfile_ac3_raw_bsi['mixlevel2']).'dB'; - $thisfile_ac3['room_type2'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp2']); - } - - } - - $thisfile_ac3_raw_bsi['copyright'] = (bool) $this->readHeaderBSI(1); - - $thisfile_ac3_raw_bsi['original'] = (bool) $this->readHeaderBSI(1); - - $thisfile_ac3_raw_bsi['timecode1_flag'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['timecode1_flag']) { - $thisfile_ac3_raw_bsi['timecode1'] = $this->readHeaderBSI(14); - } - - $thisfile_ac3_raw_bsi['timecode2_flag'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['timecode2_flag']) { - $thisfile_ac3_raw_bsi['timecode2'] = $this->readHeaderBSI(14); - } - - $thisfile_ac3_raw_bsi['addbsi_flag'] = (bool) $this->readHeaderBSI(1); - if ($thisfile_ac3_raw_bsi['addbsi_flag']) { - $thisfile_ac3_raw_bsi['addbsi_length'] = $this->readHeaderBSI(6); - - $this->AC3header['bsi'] .= getid3_lib::BigEndian2Bin($this->fread($thisfile_ac3_raw_bsi['addbsi_length'])); - - $thisfile_ac3_raw_bsi['addbsi_data'] = substr($this->AC3header['bsi'], $this->BSIoffset, $thisfile_ac3_raw_bsi['addbsi_length'] * 8); - $this->BSIoffset += $thisfile_ac3_raw_bsi['addbsi_length'] * 8; - } - return true; } @@ -251,6 +487,16 @@ return (isset($sampleRateCodeLookup[$fscod]) ? $sampleRateCodeLookup[$fscod] : false); } + public static function sampleRateCodeLookup2($fscod2) { + static $sampleRateCodeLookup2 = array( + 0 => 24000, + 1 => 22050, + 2 => 16000, + 3 => 'reserved' // If the reserved code is indicated, the decoder should not attempt to decode audio and should mute. + ); + return (isset($sampleRateCodeLookup2[$fscod2]) ? $sampleRateCodeLookup2[$fscod2] : false); + } + public static function serviceTypeLookup($bsmod, $acmod) { static $serviceTypeLookup = array(); if (empty($serviceTypeLookup)) { @@ -409,31 +655,32 @@ } public static function frameSizeLookup($frmsizecod, $fscod) { - $padding = (bool) ($frmsizecod % 2); - $framesizeid = floor($frmsizecod / 2); + // LSB is whether padding is used or not + $padding = (bool) ($frmsizecod & 0x01); + $framesizeid = ($frmsizecod & 0x3E) >> 1; static $frameSizeLookup = array(); if (empty($frameSizeLookup)) { $frameSizeLookup = array ( - 0 => array(128, 138, 192), - 1 => array(40, 160, 174, 240), - 2 => array(48, 192, 208, 288), - 3 => array(56, 224, 242, 336), - 4 => array(64, 256, 278, 384), - 5 => array(80, 320, 348, 480), - 6 => array(96, 384, 416, 576), - 7 => array(112, 448, 486, 672), - 8 => array(128, 512, 556, 768), - 9 => array(160, 640, 696, 960), - 10 => array(192, 768, 834, 1152), - 11 => array(224, 896, 974, 1344), - 12 => array(256, 1024, 1114, 1536), - 13 => array(320, 1280, 1392, 1920), - 14 => array(384, 1536, 1670, 2304), - 15 => array(448, 1792, 1950, 2688), - 16 => array(512, 2048, 2228, 3072), - 17 => array(576, 2304, 2506, 3456), - 18 => array(640, 2560, 2786, 3840) + 0 => array( 128, 138, 192), // 32 kbps + 1 => array( 160, 174, 240), // 40 kbps + 2 => array( 192, 208, 288), // 48 kbps + 3 => array( 224, 242, 336), // 56 kbps + 4 => array( 256, 278, 384), // 64 kbps + 5 => array( 320, 348, 480), // 80 kbps + 6 => array( 384, 416, 576), // 96 kbps + 7 => array( 448, 486, 672), // 112 kbps + 8 => array( 512, 556, 768), // 128 kbps + 9 => array( 640, 696, 960), // 160 kbps + 10 => array( 768, 834, 1152), // 192 kbps + 11 => array( 896, 974, 1344), // 224 kbps + 12 => array(1024, 1114, 1536), // 256 kbps + 13 => array(1280, 1392, 1920), // 320 kbps + 14 => array(1536, 1670, 2304), // 384 kbps + 15 => array(1792, 1950, 2688), // 448 kbps + 16 => array(2048, 2228, 3072), // 512 kbps + 17 => array(2304, 2506, 3456), // 576 kbps + 18 => array(2560, 2786, 3840) // 640 kbps ); } if (($fscod == 1) && $padding) { @@ -444,19 +691,21 @@ } public static function bitrateLookup($frmsizecod) { - $framesizeid = floor($frmsizecod / 2); + // LSB is whether padding is used or not + $padding = (bool) ($frmsizecod & 0x01); + $framesizeid = ($frmsizecod & 0x3E) >> 1; static $bitrateLookup = array( - 0 => 32000, - 1 => 40000, - 2 => 48000, - 3 => 56000, - 4 => 64000, - 5 => 80000, - 6 => 96000, - 7 => 112000, - 8 => 128000, - 9 => 160000, + 0 => 32000, + 1 => 40000, + 2 => 48000, + 3 => 56000, + 4 => 64000, + 5 => 80000, + 6 => 96000, + 7 => 112000, + 8 => 128000, + 9 => 160000, 10 => 192000, 11 => 224000, 12 => 256000, @@ -465,10 +714,20 @@ 15 => 448000, 16 => 512000, 17 => 576000, - 18 => 640000 + 18 => 640000, ); return (isset($bitrateLookup[$framesizeid]) ? $bitrateLookup[$framesizeid] : false); } + public static function blocksPerSyncFrame($numblkscod) { + static $blocksPerSyncFrameLookup = array( + 0 => 1, + 1 => 2, + 2 => 3, + 3 => 6, + ); + return (isset($blocksPerSyncFrameLookup[$numblkscod]) ? $blocksPerSyncFrameLookup[$numblkscod] : false); + } -} \ No newline at end of file + +}