<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.ac3.php // // module for analyzing AC-3 (aka Dolby Digital) audio files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_ac3 extends getid3_handler { /** * @var array */ private $AC3header = array(); /** * @var int */ private $BSIoffset = 0; const syncword = 0x0B77; /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; ///AH $info['ac3']['raw']['bsi'] = array(); $thisfile_ac3 = &$info['ac3']; $thisfile_ac3_raw = &$thisfile_ac3['raw']; $thisfile_ac3_raw_bsi = &$thisfile_ac3_raw['bsi']; // http://www.atsc.org/standards/a_52a.pdf $info['fileformat'] = 'ac3'; // An AC-3 serial coded audio bit stream is made up of a sequence of synchronization frames // Each synchronization frame contains 6 coded audio blocks (AB), each of which represent 256 // new audio samples per channel. A synchronization information (SI) header at the beginning // of each frame contains information needed to acquire and maintain synchronization. A // bit stream information (BSI) header follows SI, and contains parameters describing the coded // audio service. The coded audio blocks may be followed by an auxiliary data (Aux) field. At the // end of each frame is an error check field that includes a CRC word for error detection. An // additional CRC word is located in the SI header, the use of which, by a decoder, is optional. // // syncinfo() | bsi() | AB0 | AB1 | AB2 | AB3 | AB4 | AB5 | Aux | CRC // syncinfo() { // syncword 16 // crc1 16 // fscod 2 // frmsizecod 6 // } /* end of syncinfo */ $this->fseek($info['avdataoffset']); $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($tempAC3header); if ($this->AC3header['syncinfo'] !== self::syncword) { if (!$this->isDependencyFor('matroska')) { unset($info['fileformat'], $info['ac3']); return $this->error('Expecting "'.dechex(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.dechex($this->AC3header['syncinfo']).'"'); } } $info['audio']['dataformat'] = 'ac3'; $info['audio']['bitrate_mode'] = 'cbr'; $info['audio']['lossless'] = false; if ($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_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($info['ac3']); return false; } if (isset($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'] = $thisfile_ac3['bitrate']; if (isset($thisfile_ac3_raw_bsi['bsmod']) && isset($thisfile_ac3_raw_bsi['acmod'])) { $thisfile_ac3['service_type'] = self::serviceTypeLookup($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) { $thisfile_ac3[$key] = $value; } switch ($thisfile_ac3_raw_bsi['acmod']) { case 0: case 1: $info['audio']['channelmode'] = 'mono'; break; case 3: case 4: $info['audio']['channelmode'] = 'stereo'; break; default: $info['audio']['channelmode'] = 'surround'; break; } $info['audio']['channels'] = $thisfile_ac3['num_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['flags']['lfeon']); $thisfile_ac3['dialogue_normalization'] = '-'.$thisfile_ac3_raw_bsi['dialnorm'].'dB'; return true; } /** * @param int $length * * @return int */ private function readHeaderBSI($length) { $data = substr($this->AC3header['bsi'], $this->BSIoffset, $length); $this->BSIoffset += $length; return bindec($data); } /** * @param int $fscod * * @return int|string|false */ public static function sampleRateCodeLookup($fscod) { static $sampleRateCodeLookup = array( 0 => 48000, 1 => 44100, 2 => 32000, 3 => 'reserved' // If the reserved code is indicated, the decoder should not attempt to decode audio and should mute. ); return (isset($sampleRateCodeLookup[$fscod]) ? $sampleRateCodeLookup[$fscod] : false); } /** * @param int $fscod2 * * @return int|string|false */ public static function sampleRateCodeLookup2($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); } /** * @param int $bsmod * @param int $acmod * * @return string|false */ public static function serviceTypeLookup($bsmod, $acmod) { static $serviceTypeLookup = array(); if (empty($serviceTypeLookup)) { for ($i = 0; $i <= 7; $i++) { $serviceTypeLookup[0][$i] = 'main audio service: complete main (CM)'; $serviceTypeLookup[1][$i] = 'main audio service: music and effects (ME)'; $serviceTypeLookup[2][$i] = 'associated service: visually impaired (VI)'; $serviceTypeLookup[3][$i] = 'associated service: hearing impaired (HI)'; $serviceTypeLookup[4][$i] = 'associated service: dialogue (D)'; $serviceTypeLookup[5][$i] = 'associated service: commentary (C)'; $serviceTypeLookup[6][$i] = 'associated service: emergency (E)'; } $serviceTypeLookup[7][1] = 'associated service: voice over (VO)'; for ($i = 2; $i <= 7; $i++) { $serviceTypeLookup[7][$i] = 'main audio service: karaoke'; } } return (isset($serviceTypeLookup[$bsmod][$acmod]) ? $serviceTypeLookup[$bsmod][$acmod] : false); } /** * @param int $acmod * * @return array|false */ public static function audioCodingModeLookup($acmod) { // array(channel configuration, # channels (not incl LFE), channel order) static $audioCodingModeLookup = array ( 0 => array('channel_config'=>'1+1', 'num_channels'=>2, 'channel_order'=>'Ch1,Ch2'), 1 => array('channel_config'=>'1/0', 'num_channels'=>1, 'channel_order'=>'C'), 2 => array('channel_config'=>'2/0', 'num_channels'=>2, 'channel_order'=>'L,R'), 3 => array('channel_config'=>'3/0', 'num_channels'=>3, 'channel_order'=>'L,C,R'), 4 => array('channel_config'=>'2/1', 'num_channels'=>3, 'channel_order'=>'L,R,S'), 5 => array('channel_config'=>'3/1', 'num_channels'=>4, 'channel_order'=>'L,C,R,S'), 6 => array('channel_config'=>'2/2', 'num_channels'=>4, 'channel_order'=>'L,R,SL,SR'), 7 => array('channel_config'=>'3/2', 'num_channels'=>5, 'channel_order'=>'L,C,R,SL,SR'), ); return (isset($audioCodingModeLookup[$acmod]) ? $audioCodingModeLookup[$acmod] : false); } /** * @param int $cmixlev * * @return int|float|string|false */ public static function centerMixLevelLookup($cmixlev) { static $centerMixLevelLookup; if (empty($centerMixLevelLookup)) { $centerMixLevelLookup = array( 0 => pow(2, -3.0 / 6), // 0.707 (-3.0 dB) 1 => pow(2, -4.5 / 6), // 0.595 (-4.5 dB) 2 => pow(2, -6.0 / 6), // 0.500 (-6.0 dB) 3 => 'reserved' ); } return (isset($centerMixLevelLookup[$cmixlev]) ? $centerMixLevelLookup[$cmixlev] : false); } /** * @param int $surmixlev * * @return int|float|string|false */ public static function surroundMixLevelLookup($surmixlev) { static $surroundMixLevelLookup; if (empty($surroundMixLevelLookup)) { $surroundMixLevelLookup = array( 0 => pow(2, -3.0 / 6), 1 => pow(2, -6.0 / 6), 2 => 0, 3 => 'reserved' ); } return (isset($surroundMixLevelLookup[$surmixlev]) ? $surroundMixLevelLookup[$surmixlev] : false); } /** * @param int $dsurmod * * @return string|false */ public static function dolbySurroundModeLookup($dsurmod) { static $dolbySurroundModeLookup = array( 0 => 'not indicated', 1 => 'Not Dolby Surround encoded', 2 => 'Dolby Surround encoded', 3 => 'reserved' ); return (isset($dolbySurroundModeLookup[$dsurmod]) ? $dolbySurroundModeLookup[$dsurmod] : false); } /** * @param int $acmod * @param bool $lfeon * * @return array */ public static function channelsEnabledLookup($acmod, $lfeon) { $lookup = array( 'ch1'=>($acmod == 0), 'ch2'=>($acmod == 0), 'left'=>($acmod > 1), 'right'=>($acmod > 1), 'center'=>(bool) ($acmod & 0x01), 'surround_mono'=>false, 'surround_left'=>false, 'surround_right'=>false, 'lfe'=>$lfeon); switch ($acmod) { case 4: case 5: $lookup['surround_mono'] = true; break; case 6: case 7: $lookup['surround_left'] = true; $lookup['surround_right'] = true; break; } return $lookup; } /** * @param int $compre * * @return float|int */ public static function heavyCompression($compre) { // The first four bits indicate gain changes in 6.02dB increments which can be // implemented with an arithmetic shift operation. The following four bits // indicate linear gain changes, and require a 5-bit multiply. // We will represent the two 4-bit fields of compr as follows: // X0 X1 X2 X3 . Y4 Y5 Y6 Y7 // The meaning of the X values is most simply described by considering X to represent a 4-bit // signed integer with values from -8 to +7. The gain indicated by X is then (X + 1) * 6.02 dB. The // following table shows this in detail. // Meaning of 4 msb of compr // 7 +48.16 dB // 6 +42.14 dB // 5 +36.12 dB // 4 +30.10 dB // 3 +24.08 dB // 2 +18.06 dB // 1 +12.04 dB // 0 +6.02 dB // -1 0 dB // -2 -6.02 dB // -3 -12.04 dB // -4 -18.06 dB // -5 -24.08 dB // -6 -30.10 dB // -7 -36.12 dB // -8 -42.14 dB $fourbit = str_pad(decbin(($compre & 0xF0) >> 4), 4, '0', STR_PAD_LEFT); if ($fourbit[0] == '1') { $log_gain = -8 + bindec(substr($fourbit, 1)); } else { $log_gain = bindec(substr($fourbit, 1)); } $log_gain = ($log_gain + 1) * getid3_lib::RGADamplitude2dB(2); // The value of Y is a linear representation of a gain change of up to -6 dB. Y is considered to // be an unsigned fractional integer, with a leading value of 1, or: 0.1 Y4 Y5 Y6 Y7 (base 2). Y can // represent values between 0.111112 (or 31/32) and 0.100002 (or 1/2). Thus, Y can represent gain // changes from -0.28 dB to -6.02 dB. $lin_gain = (16 + ($compre & 0x0F)) / 32; // The combination of X and Y values allows compr to indicate gain changes from // 48.16 - 0.28 = +47.89 dB, to // -42.14 - 6.02 = -48.16 dB. return $log_gain - $lin_gain; } /** * @param int $roomtyp * * @return string|false */ public static function roomTypeLookup($roomtyp) { static $roomTypeLookup = array( 0 => 'not indicated', 1 => 'large room, X curve monitor', 2 => 'small room, flat monitor', 3 => 'reserved' ); return (isset($roomTypeLookup[$roomtyp]) ? $roomTypeLookup[$roomtyp] : false); } /** * @param int $frmsizecod * @param int $fscod * * @return int|false */ public static function frameSizeLookup($frmsizecod, $fscod) { // 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), // 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 ); } $paddingBytes = 0; if (($fscod == 1) && $padding) { // frame lengths are padded by 1 word (16 bits) at 44100 // (fscode==1) means 44100Hz (see sampleRateCodeLookup) $paddingBytes = 2; } return (isset($frameSizeLookup[$framesizeid][$fscod]) ? $frameSizeLookup[$framesizeid][$fscod] + $paddingBytes : false); } /** * @param int $frmsizecod * * @return int|false */ public static function bitrateLookup($frmsizecod) { // LSB is whether padding is used or not $padding = (bool) ($frmsizecod & 0x01); $framesizeid = ($frmsizecod & 0x3E) >> 1; static $bitrateLookup = array( 0 => 32000, 1 => 40000, 2 => 48000, 3 => 56000, 4 => 64000, 5 => 80000, 6 => 96000, 7 => 112000, 8 => 128000, 9 => 160000, 10 => 192000, 11 => 224000, 12 => 256000, 13 => 320000, 14 => 384000, 15 => 448000, 16 => 512000, 17 => 576000, 18 => 640000, ); return (isset($bitrateLookup[$framesizeid]) ? $bitrateLookup[$framesizeid] : false); } /** * @param int $numblkscod * * @return int|false */ public static function blocksPerSyncFrame($numblkscod) { static $blocksPerSyncFrameLookup = array( 0 => 1, 1 => 2, 2 => 3, 3 => 6, ); return (isset($blocksPerSyncFrameLookup[$numblkscod]) ? $blocksPerSyncFrameLookup[$numblkscod] : false); } }

خطوة

هل يعمل الذكاء الاصطناعي بدلا منا ؟مهن تتوارى واخرى تنهض

يونيو 9, 2025

1٬224 3 دقائق

كتبت: فرح سمير

نشر رجلُ الأعمال المصريّ أحمد أبو هشيمة عبر حسابه الرسمي على منصة LinkedIn “لازم تعرف إن الذكاء الاصطناعي مبقاش مستقبل، هو حاضر واللي بيتأخر فيه بيتأخر كتير جدًا.” مؤكدًا أنّ التراجع والإهمال في هذا المجال يضر ّ بمعدلات الإنتاج ويؤخّر المؤسّسات

وبالاعتماد على تصريح المهندس خالد الدغيثر، المؤسّس والرئيس التنفيذي لشركة” مرافق الموحدة “والإداري في “إتقان السعودية”، أصبح الذكاء الاصطناعي لاعبًا رئيسيًا في إعادة تشكيل الوظائف داخل الشركات.

محمد مغربي- أستشاري التأمين والذكاء الاصطناعي

أوضح محمد مغربي، استشاري التأمين والذكاء الاصطناعي، أن السنوات الأخيرة شهدت ظهور وظائف لم تكن موجودة قبل عقد، مثل Prompt Engineer وAI Trainer، والتي تُعنى بتدريب النماذج وكتابة الأوامر للحصول على نتائج دقيقة. ولفت إلى أن الذكاء الاصطناعي لم يكتفِ بتحسين مهام تقليدية كالتسويق وخدمة العملاء، بل أوجد وظائف جديدة كليًا مثل مهندس تعلم الآلة، عالم البيانات، مدير منتج الذكاء الاصطناعي، وأخصائي أخلاقيات الذكاء الاصطناعي.

وأشار مغربي إلى تخصصات حديثة مثل Explainable AI وAI Governance، تعكس التركيز المتزايد على الشفافية والمسؤولية، مؤكدًا أن قطاعات التكنولوجيا، الصحة، المال، التعليم، والأمن السيبراني كانت الأكثر استفادة من هذه الطفرة.

كما برزت أدوار جديدة في سوق العمل مثل مصمم المحادثات الآلية، أخصائي التشغيل الآلي، ومهندس عمليات الذكاء الاصطناعي، في حين أصبح العمل الحر شائعًا في مجالات مثل الترجمة وكتابة المحتوى، مع اعتماد متزايد على المهارات الفعلية أكثر من الشهادات.

وشدّد مغربي على أهمية المزج بين الإبداع والتقنية، مشيرًا إلى تجارب مبرمجين يصممون موسيقى بالذكاء الاصطناعي ومصممي جرافيك يستخدمون أدوات مثل Midjourney وDALL·E. كما قدّم نصائح عملية للراغبين في دخول المجال، أبرزها: تعلم Python، أساسيات التعلم الآلي، أدوات تحليل البيانات مثل SQL وPower BI، واستخدام أدوات مثل ChatGPT وCopilot، مع التركيز على التفكير النقدي وفهم أخلاقيات الذكاء الاصطناعي.

وأكد أن وظائف مثل Prompt Engineer ستشهد تطورًا كبيرًا في المستقبل، محذرًا من الاعتماد الكامل على أداة واحدة، ومشددًا على أهمية بناء أساس متين من المهارات التحليلية وفهم الأنظمة. وختم بدعوة الشباب إلى البدء الآن، تنفيذ مشاريع بسيطة، والانخراط في مجتمعات تقنية لدعم التعلم المستمر.

د. رضوى عبد اللطيف – أستاذة الإعلام الرقمي

فيما تؤكد الدكتورة رضوى عبد اللطيف، أستاذة الإعلام الرقمي، أن “مفيش حاجة اسمها مهن صحفية جديدة، الصحفي هو الصحفي”، تشير إلى أن التغير الحقيقي يكمن في تطور المهام داخل المؤسسات الإعلامية التي تعتمد على تقنيات الذكاء الاصطناعي. وتوضح أن الصحفي اليوم مطالب بإجادة إنتاج المحتوى ونشره وتسويقه، إلى جانب فهم سلوك الجمهور والتحقق من دقة المعلومات باستخدام أدوات الذكاء الاصطناعي.

وترى عبد اللطيف أن الدور الإنساني للصحفي لا يمكن استبداله، بل يُستكمل من خلال مجموعة من الأدوات الحديثة مثل برامج التحرير والتصحيح اللغوي، الترجمة الآلية، التسويق الرقمي، تخصيص المحتوى، وتحليل سلوك الجمهور. وتلفت إلى أن هذه التقنيات أسهمت في نشوء وظائف جديدة في المجال الإعلامي، من بينها محلل بيانات الجمهور، خبير تحليل التوجهات، صحفي البيانات التحليلية، مصمم المحتوى التفاعلي، ومدير الحملات الرقمية، مؤكدة على ضرورة الإبقاء على الرقابة البشرية والالتزام بالقيم المهنية لضمان نزاهة العمل الصحفي

خالد الشربيني – مستشار استراتيجي وخبير موارد بشرية

أكد خالد الشربيني، المستشار الاستراتيجي وخبير الموارد البشرية، أن الذكاء الاصطناعي أصبح ضرورة ملحّة في سوق العمل، مستشهدًا بتقرير Veritone لعام 2024، الذي أشار إلى زيادة وظائف الذكاء الاصطناعي في الولايات المتحدة بنسبة 24.5% مقارنة بعام 2023، بما يعادل أكثر من 81 ألف وظيفة جديدة.

وأوضح أن الشركات تبحث عن مهارات متخصصة مثل تحليل البيانات، البرمجة (Python، Java)، الأمن السيبراني، التعلم الآلي، والهندسة التفاعلية، مؤكدًا أن 87% من المؤسسات باتت تستخدم الذكاء الاصطناعي في التوظيف، عبر أدوات مثل فرز السير الذاتية والمقابلات الذكية.

وأشار الشربيني إلى توسع قطاعات مثل الرعاية الصحية، المال، التسويق الرقمي، والخدمات اللوجستية بفضل هذه التقنيات، لافتًا إلى أن المنتدى الاقتصادي العالمي يتوقع خلق 170 مليون وظيفة جديدة بحلول 2030. كما كشف أن 77% من الشركات تخطط لإعادة تأهيل موظفيها عبر تدريبات وشهادات مهنية، مؤكدًا على أهمية دور “قادة التحول” في دمج التكنولوجيا داخل بيئات العمل.

وختم بدعوة الشباب إلى تطوير مهاراتهم التقنية والشخصية، وتبنّي التعلم المستمر، مشددًا على أن الذكاء الاصطناعي لا يُغني عن الإنسان، بل يدعمه ويعزز جودة القرارات والخدمات.

يتضح جليًا من خلال تصريحات أحمد أبو هشيمة وخبراء المجال أن الذكاء الاصطناعي لم يعد خيارًا مستقبليًا بل ضرورة حاضرة تتطلب انتباه المؤسسات والأفراد على حد سواء، وإلا فقدوا فرصًا كبيرة في التطور والابتكار. وقد كشفت هذه الحوارات عن تنوع الأدوار والمهام التي نشأت مع اعتماد تقنيات الذكاء الاصطناعي، بدءًا من تحليل البيانات وتصميم النماذج وصولًا إلى إدارة الحملات الرقمية وإثراء المحتوى الصحفي، مع التأكيد الدائم على أهمية العنصر البشري والرقابة الإنسانية لضمان جودة الأداء والحفاظ على القيم المهنية.

يبقى الاستثمار في بناء المهارات الأساسية والتخصصية، وتبني ثقافة التعلم المستمر، هو السبيل الأمثل لمواجهة تحديات التحول الرقمي واغتنام فرصه المتجددة. ومن خلال تعاون القادة وصناع القرار مع كوادرهم على تأهيل بيئات العمل وتبني أدوات الذكاء الاصطناعي بوعي ومسؤولية، يمكن للمؤسسات أن تصنع طريقها نحو مستقبلٍ أكثر إنتاجية واستدامة

يونيو 9, 2025

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