Media: update the getID3 library to version 1.9.14 to avoid fatal errors in PHP7.
Props MyThemeShop for the initial patch. Fixes #41496. Built from https://develop.svn.wordpress.org/trunk@41196 git-svn-id: http://core.svn.wordpress.org/trunk@41036 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Scott Taylor
@@ -20,7 +20,7 @@ class getid3_ac3 extends getid3_handler
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private $AC3header = array();
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private $BSIoffset = 0;
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const syncword = "\x0B\x77";
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const syncword = 0x0B77;
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public function Analyze() {
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$info = &$this->getid3->info;
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@@ -55,53 +55,389 @@ class getid3_ac3 extends getid3_handler
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// } /* end of syncinfo */
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$this->fseek($info['avdataoffset']);
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$this->AC3header['syncinfo'] = $this->fread(5);
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$tempAC3header = $this->fread(100); // should be enough to cover all data, there are some variable-length fields...?
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$this->AC3header['syncinfo'] = getid3_lib::BigEndian2Int(substr($tempAC3header, 0, 2));
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$this->AC3header['bsi'] = getid3_lib::BigEndian2Bin(substr($tempAC3header, 2));
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$thisfile_ac3_raw_bsi['bsid'] = (getid3_lib::LittleEndian2Int(substr($tempAC3header, 5, 1)) & 0xF8) >> 3; // AC3 and E-AC3 put the "bsid" version identifier in the same place, but unfortnately the 4 bytes between the syncword and the version identifier are interpreted differently, so grab it here so the following code structure can make sense
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unset($tempAC3header);
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if (strpos($this->AC3header['syncinfo'], self::syncword) === 0) {
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$thisfile_ac3_raw['synchinfo']['synchword'] = self::syncword;
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$offset = 2;
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} else {
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if ($this->AC3header['syncinfo'] !== self::syncword) {
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if (!$this->isDependencyFor('matroska')) {
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unset($info['fileformat'], $info['ac3']);
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return $this->error('Expecting "'.getid3_lib::PrintHexBytes(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($this->AC3header['syncinfo'], 0, 2)).'"');
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return $this->error('Expecting "'.dechex(self::syncword).'" at offset '.$info['avdataoffset'].', found "'.dechex($this->AC3header['syncinfo']).'"');
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}
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$offset = 0;
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$this->fseek(-2, SEEK_CUR);
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}
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$info['audio']['dataformat'] = 'ac3';
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$info['audio']['bitrate_mode'] = 'cbr';
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$info['audio']['lossless'] = false;
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$thisfile_ac3_raw['synchinfo']['crc1'] = getid3_lib::LittleEndian2Int(substr($this->AC3header['syncinfo'], $offset, 2));
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$ac3_synchinfo_fscod_frmsizecod = getid3_lib::LittleEndian2Int(substr($this->AC3header['syncinfo'], ($offset + 2), 1));
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$thisfile_ac3_raw['synchinfo']['fscod'] = ($ac3_synchinfo_fscod_frmsizecod & 0xC0) >> 6;
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$thisfile_ac3_raw['synchinfo']['frmsizecod'] = ($ac3_synchinfo_fscod_frmsizecod & 0x3F);
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if ($thisfile_ac3_raw_bsi['bsid'] <= 8) {
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$thisfile_ac3['sample_rate'] = self::sampleRateCodeLookup($thisfile_ac3_raw['synchinfo']['fscod']);
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if ($thisfile_ac3_raw['synchinfo']['fscod'] <= 3) {
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$info['audio']['sample_rate'] = $thisfile_ac3['sample_rate'];
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}
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$thisfile_ac3_raw_bsi['crc1'] = getid3_lib::Bin2Dec($this->readHeaderBSI(16));
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$thisfile_ac3_raw_bsi['fscod'] = $this->readHeaderBSI(2); // 5.4.1.3
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$thisfile_ac3_raw_bsi['frmsizecod'] = $this->readHeaderBSI(6); // 5.4.1.4
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if ($thisfile_ac3_raw_bsi['frmsizecod'] > 37) { // binary: 100101 - see Table 5.18 Frame Size Code Table (1 word = 16 bits)
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$this->warning('Unexpected ac3.bsi.frmsizecod value: '.$thisfile_ac3_raw_bsi['frmsizecod'].', bitrate not set correctly');
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}
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$thisfile_ac3['frame_length'] = self::frameSizeLookup($thisfile_ac3_raw['synchinfo']['frmsizecod'], $thisfile_ac3_raw['synchinfo']['fscod']);
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$thisfile_ac3['bitrate'] = self::bitrateLookup($thisfile_ac3_raw['synchinfo']['frmsizecod']);
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$info['audio']['bitrate'] = $thisfile_ac3['bitrate'];
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$thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended
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$thisfile_ac3_raw_bsi['bsmod'] = $this->readHeaderBSI(3);
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$thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3);
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$this->AC3header['bsi'] = getid3_lib::BigEndian2Bin($this->fread(15));
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$ac3_bsi_offset = 0;
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if ($thisfile_ac3_raw_bsi['acmod'] & 0x01) {
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// If the lsb of acmod is a 1, center channel is in use and cmixlev follows in the bit stream.
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$thisfile_ac3_raw_bsi['cmixlev'] = $this->readHeaderBSI(2);
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$thisfile_ac3['center_mix_level'] = self::centerMixLevelLookup($thisfile_ac3_raw_bsi['cmixlev']);
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}
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$thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5);
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if ($thisfile_ac3_raw_bsi['bsid'] > 8) {
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// Decoders which can decode version 8 will thus be able to decode version numbers less than 8.
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// If this standard is extended by the addition of additional elements or features, a value of bsid greater than 8 will be used.
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// Decoders built to this version of the standard will not be able to decode versions with bsid greater than 8.
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$this->error('Bit stream identification is version '.$thisfile_ac3_raw_bsi['bsid'].', but getID3() only understands up to version 8');
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if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) {
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// If the msb of acmod is a 1, surround channels are in use and surmixlev follows in the bit stream.
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$thisfile_ac3_raw_bsi['surmixlev'] = $this->readHeaderBSI(2);
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$thisfile_ac3['surround_mix_level'] = self::surroundMixLevelLookup($thisfile_ac3_raw_bsi['surmixlev']);
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}
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if ($thisfile_ac3_raw_bsi['acmod'] == 0x02) {
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// When operating in the two channel mode, this 2-bit code indicates whether or not the program has been encoded in Dolby Surround.
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$thisfile_ac3_raw_bsi['dsurmod'] = $this->readHeaderBSI(2);
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$thisfile_ac3['dolby_surround_mode'] = self::dolbySurroundModeLookup($thisfile_ac3_raw_bsi['dsurmod']);
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}
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$thisfile_ac3_raw_bsi['flags']['lfeon'] = (bool) $this->readHeaderBSI(1);
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// This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31.
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// The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent.
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$thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5); // 5.4.2.8 dialnorm: Dialogue Normalization, 5 Bits
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$thisfile_ac3_raw_bsi['flags']['compr'] = (bool) $this->readHeaderBSI(1); // 5.4.2.9 compre: Compression Gain Word Exists, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['compr']) {
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$thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8); // 5.4.2.10 compr: Compression Gain Word, 8 Bits
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$thisfile_ac3['heavy_compression'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr']);
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}
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$thisfile_ac3_raw_bsi['flags']['langcod'] = (bool) $this->readHeaderBSI(1); // 5.4.2.11 langcode: Language Code Exists, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['langcod']) {
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$thisfile_ac3_raw_bsi['langcod'] = $this->readHeaderBSI(8); // 5.4.2.12 langcod: Language Code, 8 Bits
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}
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$thisfile_ac3_raw_bsi['flags']['audprodinfo'] = (bool) $this->readHeaderBSI(1); // 5.4.2.13 audprodie: Audio Production Information Exists, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['audprodinfo']) {
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$thisfile_ac3_raw_bsi['mixlevel'] = $this->readHeaderBSI(5); // 5.4.2.14 mixlevel: Mixing Level, 5 Bits
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$thisfile_ac3_raw_bsi['roomtyp'] = $this->readHeaderBSI(2); // 5.4.2.15 roomtyp: Room Type, 2 Bits
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$thisfile_ac3['mixing_level'] = (80 + $thisfile_ac3_raw_bsi['mixlevel']).'dB';
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$thisfile_ac3['room_type'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp']);
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}
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$thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5); // 5.4.2.16 dialnorm2: Dialogue Normalization, ch2, 5 Bits
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$thisfile_ac3['dialogue_normalization2'] = '-'.$thisfile_ac3_raw_bsi['dialnorm2'].'dB'; // This indicates how far the average dialogue level is below digital 100 percent. Valid values are 1-31. The value of 0 is reserved. The values of 1 to 31 are interpreted as -1 dB to -31 dB with respect to digital 100 percent.
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$thisfile_ac3_raw_bsi['flags']['compr2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.17 compr2e: Compression Gain Word Exists, ch2, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['compr2']) {
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$thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8); // 5.4.2.18 compr2: Compression Gain Word, ch2, 8 Bits
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$thisfile_ac3['heavy_compression2'] = self::heavyCompression($thisfile_ac3_raw_bsi['compr2']);
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}
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$thisfile_ac3_raw_bsi['flags']['langcod2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.19 langcod2e: Language Code Exists, ch2, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['langcod2']) {
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$thisfile_ac3_raw_bsi['langcod2'] = $this->readHeaderBSI(8); // 5.4.2.20 langcod2: Language Code, ch2, 8 Bits
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}
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$thisfile_ac3_raw_bsi['flags']['audprodinfo2'] = (bool) $this->readHeaderBSI(1); // 5.4.2.21 audprodi2e: Audio Production Information Exists, ch2, 1 Bit
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if ($thisfile_ac3_raw_bsi['flags']['audprodinfo2']) {
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$thisfile_ac3_raw_bsi['mixlevel2'] = $this->readHeaderBSI(5); // 5.4.2.22 mixlevel2: Mixing Level, ch2, 5 Bits
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$thisfile_ac3_raw_bsi['roomtyp2'] = $this->readHeaderBSI(2); // 5.4.2.23 roomtyp2: Room Type, ch2, 2 Bits
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$thisfile_ac3['mixing_level2'] = (80 + $thisfile_ac3_raw_bsi['mixlevel2']).'dB';
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$thisfile_ac3['room_type2'] = self::roomTypeLookup($thisfile_ac3_raw_bsi['roomtyp2']);
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}
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$thisfile_ac3_raw_bsi['copyright'] = (bool) $this->readHeaderBSI(1); // 5.4.2.24 copyrightb: Copyright Bit, 1 Bit
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$thisfile_ac3_raw_bsi['original'] = (bool) $this->readHeaderBSI(1); // 5.4.2.25 origbs: Original Bit Stream, 1 Bit
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$thisfile_ac3_raw_bsi['flags']['timecod1'] = $this->readHeaderBSI(2); // 5.4.2.26 timecod1e, timcode2e: Time Code (first and second) Halves Exist, 2 Bits
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if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x01) {
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$thisfile_ac3_raw_bsi['timecod1'] = $this->readHeaderBSI(14); // 5.4.2.27 timecod1: Time code first half, 14 bits
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$thisfile_ac3['timecode1'] = 0;
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$thisfile_ac3['timecode1'] += (($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
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$thisfile_ac3['timecode1'] += (($thisfile_ac3_raw_bsi['timecod1'] & 0x01F8) >> 3) * 60; // The next 6 bits represent the time in minutes, with valid values of 0<>59
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$thisfile_ac3['timecode1'] += (($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)
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}
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if ($thisfile_ac3_raw_bsi['flags']['timecod1'] & 0x02) {
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$thisfile_ac3_raw_bsi['timecod2'] = $this->readHeaderBSI(14); // 5.4.2.28 timecod2: Time code second half, 14 bits
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$thisfile_ac3['timecode2'] = 0;
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$thisfile_ac3['timecode2'] += (($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)
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$thisfile_ac3['timecode2'] += (($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)
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$thisfile_ac3['timecode2'] += (($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
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}
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$thisfile_ac3_raw_bsi['flags']['addbsi'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['addbsi']) {
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$thisfile_ac3_raw_bsi['addbsi_length'] = $this->readHeaderBSI(6) + 1; // This 6-bit code, which exists only if addbside is a 1, indicates the length in bytes of additional bit stream information. The valid range of addbsil is 0<>63, indicating 1<>64 additional bytes, respectively.
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$this->AC3header['bsi'] .= getid3_lib::BigEndian2Bin($this->fread($thisfile_ac3_raw_bsi['addbsi_length']));
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$thisfile_ac3_raw_bsi['addbsi_data'] = substr($this->AC3header['bsi'], $this->BSIoffset, $thisfile_ac3_raw_bsi['addbsi_length'] * 8);
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$this->BSIoffset += $thisfile_ac3_raw_bsi['addbsi_length'] * 8;
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}
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} elseif ($thisfile_ac3_raw_bsi['bsid'] <= 16) { // E-AC3
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$this->error('E-AC3 parsing is incomplete and experimental in this version of getID3 ('.$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.');
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$info['audio']['dataformat'] = 'eac3';
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$thisfile_ac3_raw_bsi['strmtyp'] = $this->readHeaderBSI(2);
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$thisfile_ac3_raw_bsi['substreamid'] = $this->readHeaderBSI(3);
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$thisfile_ac3_raw_bsi['frmsiz'] = $this->readHeaderBSI(11);
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$thisfile_ac3_raw_bsi['fscod'] = $this->readHeaderBSI(2);
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if ($thisfile_ac3_raw_bsi['fscod'] == 3) {
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$thisfile_ac3_raw_bsi['fscod2'] = $this->readHeaderBSI(2);
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$thisfile_ac3_raw_bsi['numblkscod'] = 3; // six blocks per syncframe
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} else {
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$thisfile_ac3_raw_bsi['numblkscod'] = $this->readHeaderBSI(2);
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}
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$thisfile_ac3['bsi']['blocks_per_sync_frame'] = self::blocksPerSyncFrame($thisfile_ac3_raw_bsi['numblkscod']);
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$thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3);
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$thisfile_ac3_raw_bsi['flags']['lfeon'] = (bool) $this->readHeaderBSI(1);
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$thisfile_ac3_raw_bsi['bsid'] = $this->readHeaderBSI(5); // we already know this from pre-parsing the version identifier, but re-read it to let the bitstream flow as intended
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$thisfile_ac3_raw_bsi['dialnorm'] = $this->readHeaderBSI(5);
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$thisfile_ac3_raw_bsi['flags']['compr'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['compr']) {
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$thisfile_ac3_raw_bsi['compr'] = $this->readHeaderBSI(8);
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}
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if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value)
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$thisfile_ac3_raw_bsi['dialnorm2'] = $this->readHeaderBSI(5);
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$thisfile_ac3_raw_bsi['flags']['compr2'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['compr2']) {
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$thisfile_ac3_raw_bsi['compr2'] = $this->readHeaderBSI(8);
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}
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}
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if ($thisfile_ac3_raw_bsi['strmtyp'] == 1) { // if dependent stream
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$thisfile_ac3_raw_bsi['flags']['chanmap'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['chanmap']) {
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$thisfile_ac3_raw_bsi['chanmap'] = $this->readHeaderBSI(8);
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}
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}
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$thisfile_ac3_raw_bsi['flags']['mixmdat'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['mixmdat']) { // Mixing metadata
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if ($thisfile_ac3_raw_bsi['acmod'] > 2) { // if more than 2 channels
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$thisfile_ac3_raw_bsi['dmixmod'] = $this->readHeaderBSI(2);
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}
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if (($thisfile_ac3_raw_bsi['acmod'] & 0x01) && ($thisfile_ac3_raw_bsi['acmod'] > 2)) { // if three front channels exist
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$thisfile_ac3_raw_bsi['ltrtcmixlev'] = $this->readHeaderBSI(3);
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$thisfile_ac3_raw_bsi['lorocmixlev'] = $this->readHeaderBSI(3);
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}
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if ($thisfile_ac3_raw_bsi['acmod'] & 0x04) { // if a surround channel exists
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$thisfile_ac3_raw_bsi['ltrtsurmixlev'] = $this->readHeaderBSI(3);
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$thisfile_ac3_raw_bsi['lorosurmixlev'] = $this->readHeaderBSI(3);
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}
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if ($thisfile_ac3_raw_bsi['flags']['lfeon']) { // if the LFE channel exists
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$thisfile_ac3_raw_bsi['flags']['lfemixlevcod'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['lfemixlevcod']) {
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$thisfile_ac3_raw_bsi['lfemixlevcod'] = $this->readHeaderBSI(5);
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}
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}
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if ($thisfile_ac3_raw_bsi['strmtyp'] == 0) { // if independent stream
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$thisfile_ac3_raw_bsi['flags']['pgmscl'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['pgmscl']) {
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$thisfile_ac3_raw_bsi['pgmscl'] = $this->readHeaderBSI(6);
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}
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if ($thisfile_ac3_raw_bsi['acmod'] == 0) { // if 1+1 mode (dual mono, so some items need a second value)
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$thisfile_ac3_raw_bsi['flags']['pgmscl2'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['pgmscl2']) {
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$thisfile_ac3_raw_bsi['pgmscl2'] = $this->readHeaderBSI(6);
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}
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}
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$thisfile_ac3_raw_bsi['flags']['extpgmscl'] = (bool) $this->readHeaderBSI(1);
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if ($thisfile_ac3_raw_bsi['flags']['extpgmscl']) {
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$thisfile_ac3_raw_bsi['extpgmscl'] = $this->readHeaderBSI(6);
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}
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$thisfile_ac3_raw_bsi['mixdef'] = $this->readHeaderBSI(2);
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if ($thisfile_ac3_raw_bsi['mixdef'] == 1) { // mixing option 2
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$thisfile_ac3_raw_bsi['premixcmpsel'] = (bool) $this->readHeaderBSI(1);
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$thisfile_ac3_raw_bsi['drcsrc'] = (bool) $this->readHeaderBSI(1);
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$thisfile_ac3_raw_bsi['premixcmpscl'] = $this->readHeaderBSI(3);
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} elseif ($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_raw_bsi['bsmod'] = $this->readHeaderBSI(3);
|
||||
$thisfile_ac3_raw_bsi['acmod'] = $this->readHeaderBSI(3);
|
||||
if (isset($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'];
|
||||
|
||||
$thisfile_ac3['service_type'] = self::serviceTypeLookup($thisfile_ac3_raw_bsi['bsmod'], $thisfile_ac3_raw_bsi['acmod']);
|
||||
$ac3_coding_mode = self::audioCodingModeLookup($thisfile_ac3_raw_bsi['acmod']);
|
||||
@@ -123,114 +459,14 @@ class getid3_ac3 extends getid3_handler
|
||||
}
|
||||
$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 += $thisfile_ac3_raw_bsi['addbsi_length'] * 8;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
@@ -251,6 +487,16 @@ class getid3_ac3 extends getid3_handler
|
||||
return (isset($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 @@ class getid3_ac3 extends getid3_handler
|
||||
}
|
||||
|
||||
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) && $padding) {
|
||||
@@ -444,19 +691,21 @@ class getid3_ac3 extends getid3_handler
|
||||
}
|
||||
|
||||
public static function bitrateLookup($frmsizecod) {
|
||||
$framesizeid = floor($frmsizecod / 2);
|
||||
// LSB is whether padding is used or not
|
||||
$padding = (bool) ($frmsizecod & 0x01);
|
||||
$framesizeid = ($frmsizecod & 0x3E) >> 1;
|
||||
|
||||
static $bitrateLookup = array(
|
||||
0 => 32000,
|
||||
1 => 40000,
|
||||
2 => 48000,
|
||||
3 => 56000,
|
||||
4 => 64000,
|
||||
5 => 80000,
|
||||
6 => 96000,
|
||||
7 => 112000,
|
||||
8 => 128000,
|
||||
9 => 160000,
|
||||
0 => 32000,
|
||||
1 => 40000,
|
||||
2 => 48000,
|
||||
3 => 56000,
|
||||
4 => 64000,
|
||||
5 => 80000,
|
||||
6 => 96000,
|
||||
7 => 112000,
|
||||
8 => 128000,
|
||||
9 => 160000,
|
||||
10 => 192000,
|
||||
11 => 224000,
|
||||
12 => 256000,
|
||||
@@ -465,10 +714,20 @@ class getid3_ac3 extends getid3_handler
|
||||
15 => 448000,
|
||||
16 => 512000,
|
||||
17 => 576000,
|
||||
18 => 640000
|
||||
18 => 640000,
|
||||
);
|
||||
return (isset($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);
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user