<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <[email protected]> // // 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.mp3.php // // module for analyzing MP3 files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_mp3 extends getid3_handler { /** * Forces getID3() to scan the file byte-by-byte and log all the valid audio frame headers - extremely slow, * unrecommended, but may provide data from otherwise-unusable files. * * @var bool */ public $allow_bruteforce = false; /** * number of frames to scan to determine if MPEG-audio sequence is valid * Lower this number to 5-20 for faster scanning * Increase this number to 50+ for most accurate detection of valid VBR/CBR mpeg-audio streams * * @var int */ public $mp3_valid_check_frames = 50; /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $initialOffset = $info['avdataoffset']; if (!$this->getOnlyMPEGaudioInfo($info['avdataoffset'])) { if ($this->allow_bruteforce) { $this->error('Rescanning file in BruteForce mode'); $this->getOnlyMPEGaudioInfoBruteForce(); } } if (isset($info['mpeg']['audio']['bitrate_mode'])) { $info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']); } $CurrentDataLAMEversionString = null; if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) { $synchoffsetwarning = 'Unknown data before synch '; if (isset($info['id3v2']['headerlength'])) { $synchoffsetwarning .= '(ID3v2 header ends at '.$info['id3v2']['headerlength'].', then '.($info['avdataoffset'] - $info['id3v2']['headerlength']).' bytes garbage, '; } elseif ($initialOffset > 0) { $synchoffsetwarning .= '(should be at '.$initialOffset.', '; } else { $synchoffsetwarning .= '(should be at beginning of file, '; } $synchoffsetwarning .= 'synch detected at '.$info['avdataoffset'].')'; if (isset($info['audio']['bitrate_mode']) && ($info['audio']['bitrate_mode'] == 'cbr')) { if (!empty($info['id3v2']['headerlength']) && (($info['avdataoffset'] - $info['id3v2']['headerlength']) == $info['mpeg']['audio']['framelength'])) { $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90-3.92) DLL in CBR mode.'; $info['audio']['codec'] = 'LAME'; $CurrentDataLAMEversionString = 'LAME3.'; } elseif (empty($info['id3v2']['headerlength']) && ($info['avdataoffset'] == $info['mpeg']['audio']['framelength'])) { $synchoffsetwarning .= '. This is a known problem with some versions of LAME (3.90 - 3.92) DLL in CBR mode.'; $info['audio']['codec'] = 'LAME'; $CurrentDataLAMEversionString = 'LAME3.'; } } $this->warning($synchoffsetwarning); } if (isset($info['mpeg']['audio']['LAME'])) { $info['audio']['codec'] = 'LAME'; if (!empty($info['mpeg']['audio']['LAME']['long_version'])) { $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['long_version'], "\x00"); } elseif (!empty($info['mpeg']['audio']['LAME']['short_version'])) { $info['audio']['encoder'] = rtrim($info['mpeg']['audio']['LAME']['short_version'], "\x00"); } } $CurrentDataLAMEversionString = (!empty($CurrentDataLAMEversionString) ? $CurrentDataLAMEversionString : (isset($info['audio']['encoder']) ? $info['audio']['encoder'] : '')); if (!empty($CurrentDataLAMEversionString) && (substr($CurrentDataLAMEversionString, 0, 6) == 'LAME3.') && !preg_match('[0-9\)]', substr($CurrentDataLAMEversionString, -1))) { // a version number of LAME that does not end with a number like "LAME3.92" // or with a closing parenthesis like "LAME3.88 (alpha)" // or a version of LAME with the LAMEtag-not-filled-in-DLL-mode bug (3.90-3.92) // not sure what the actual last frame length will be, but will be less than or equal to 1441 $PossiblyLongerLAMEversion_FrameLength = 1441; // Not sure what version of LAME this is - look in padding of last frame for longer version string $PossibleLAMEversionStringOffset = $info['avdataend'] - $PossiblyLongerLAMEversion_FrameLength; $this->fseek($PossibleLAMEversionStringOffset); $PossiblyLongerLAMEversion_Data = $this->fread($PossiblyLongerLAMEversion_FrameLength); switch (substr($CurrentDataLAMEversionString, -1)) { case 'a': case 'b': // "LAME3.94a" will have a longer version string of "LAME3.94 (alpha)" for example // need to trim off "a" to match longer string $CurrentDataLAMEversionString = substr($CurrentDataLAMEversionString, 0, -1); break; } if (($PossiblyLongerLAMEversion_String = strstr($PossiblyLongerLAMEversion_Data, $CurrentDataLAMEversionString)) !== false) { if (substr($PossiblyLongerLAMEversion_String, 0, strlen($CurrentDataLAMEversionString)) == $CurrentDataLAMEversionString) { $PossiblyLongerLAMEversion_NewString = substr($PossiblyLongerLAMEversion_String, 0, strspn($PossiblyLongerLAMEversion_String, 'LAME0123456789., (abcdefghijklmnopqrstuvwxyzJFSOND)')); //"LAME3.90.3" "LAME3.87 (beta 1, Sep 27 2000)" "LAME3.88 (beta)" if (empty($info['audio']['encoder']) || (strlen($PossiblyLongerLAMEversion_NewString) > strlen($info['audio']['encoder']))) { if (!empty($info['audio']['encoder']) && !empty($info['mpeg']['audio']['LAME']['short_version']) && ($info['audio']['encoder'] == $info['mpeg']['audio']['LAME']['short_version'])) { if (preg_match('#^LAME[0-9\\.]+#', $PossiblyLongerLAMEversion_NewString, $matches)) { // "LAME3.100" -> "LAME3.100.1", but avoid including "(alpha)" and similar $info['mpeg']['audio']['LAME']['short_version'] = $matches[0]; } } $info['audio']['encoder'] = $PossiblyLongerLAMEversion_NewString; } } } } if (!empty($info['audio']['encoder'])) { $info['audio']['encoder'] = rtrim($info['audio']['encoder'], "\x00 "); } switch (isset($info['mpeg']['audio']['layer']) ? $info['mpeg']['audio']['layer'] : '') { case 1: case 2: $info['audio']['dataformat'] = 'mp'.$info['mpeg']['audio']['layer']; break; } if (isset($info['fileformat']) && ($info['fileformat'] == 'mp3')) { switch ($info['audio']['dataformat']) { case 'mp1': case 'mp2': case 'mp3': $info['fileformat'] = $info['audio']['dataformat']; break; default: $this->warning('Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$info['audio']['dataformat'].'"'); break; } } if (empty($info['fileformat'])) { unset($info['fileformat']); unset($info['audio']['bitrate_mode']); unset($info['avdataoffset']); unset($info['avdataend']); return false; } $info['mime_type'] = 'audio/mpeg'; $info['audio']['lossless'] = false; // Calculate playtime if (!isset($info['playtime_seconds']) && isset($info['audio']['bitrate']) && ($info['audio']['bitrate'] > 0)) { // https://github.com/JamesHeinrich/getID3/issues/161 // VBR header frame contains ~0.026s of silent audio data, but is not actually part of the original encoding and should be ignored $xingVBRheaderFrameLength = ((isset($info['mpeg']['audio']['VBR_frames']) && isset($info['mpeg']['audio']['framelength'])) ? $info['mpeg']['audio']['framelength'] : 0); $info['playtime_seconds'] = ($info['avdataend'] - $info['avdataoffset'] - $xingVBRheaderFrameLength) * 8 / $info['audio']['bitrate']; } $info['audio']['encoder_options'] = $this->GuessEncoderOptions(); return true; } /** * @return string */ public function GuessEncoderOptions() { // shortcuts $info = &$this->getid3->info; $thisfile_mpeg_audio = array(); $thisfile_mpeg_audio_lame = array(); if (!empty($info['mpeg']['audio'])) { $thisfile_mpeg_audio = &$info['mpeg']['audio']; if (!empty($thisfile_mpeg_audio['LAME'])) { $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; } } $encoder_options = ''; static $NamedPresetBitrates = array(16, 24, 40, 56, 112, 128, 160, 192, 256); if (isset($thisfile_mpeg_audio['VBR_method']) && ($thisfile_mpeg_audio['VBR_method'] == 'Fraunhofer') && !empty($thisfile_mpeg_audio['VBR_quality'])) { $encoder_options = 'VBR q'.$thisfile_mpeg_audio['VBR_quality']; } elseif (!empty($thisfile_mpeg_audio_lame['preset_used']) && isset($thisfile_mpeg_audio_lame['preset_used_id']) && (!in_array($thisfile_mpeg_audio_lame['preset_used_id'], $NamedPresetBitrates))) { $encoder_options = $thisfile_mpeg_audio_lame['preset_used']; } elseif (!empty($thisfile_mpeg_audio_lame['vbr_quality'])) { static $KnownEncoderValues = array(); if (empty($KnownEncoderValues)) { //$KnownEncoderValues[abrbitrate_minbitrate][vbr_quality][raw_vbr_method][raw_noise_shaping][raw_stereo_mode][ath_type][lowpass_frequency] = 'preset name'; $KnownEncoderValues[0xFF][58][1][1][3][2][20500] = '--alt-preset insane'; // 3.90, 3.90.1, 3.92 $KnownEncoderValues[0xFF][58][1][1][3][2][20600] = '--alt-preset insane'; // 3.90.2, 3.90.3, 3.91 $KnownEncoderValues[0xFF][57][1][1][3][4][20500] = '--alt-preset insane'; // 3.94, 3.95 $KnownEncoderValues['**'][78][3][2][3][2][19500] = '--alt-preset extreme'; // 3.90, 3.90.1, 3.92 $KnownEncoderValues['**'][78][3][2][3][2][19600] = '--alt-preset extreme'; // 3.90.2, 3.91 $KnownEncoderValues['**'][78][3][1][3][2][19600] = '--alt-preset extreme'; // 3.90.3 $KnownEncoderValues['**'][78][4][2][3][2][19500] = '--alt-preset fast extreme'; // 3.90, 3.90.1, 3.92 $KnownEncoderValues['**'][78][4][2][3][2][19600] = '--alt-preset fast extreme'; // 3.90.2, 3.90.3, 3.91 $KnownEncoderValues['**'][78][3][2][3][4][19000] = '--alt-preset standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues['**'][78][3][1][3][4][19000] = '--alt-preset standard'; // 3.90.3 $KnownEncoderValues['**'][78][4][2][3][4][19000] = '--alt-preset fast standard'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues['**'][78][4][1][3][4][19000] = '--alt-preset fast standard'; // 3.90.3 $KnownEncoderValues['**'][88][4][1][3][3][19500] = '--r3mix'; // 3.90, 3.90.1, 3.92 $KnownEncoderValues['**'][88][4][1][3][3][19600] = '--r3mix'; // 3.90.2, 3.90.3, 3.91 $KnownEncoderValues['**'][67][4][1][3][4][18000] = '--r3mix'; // 3.94, 3.95 $KnownEncoderValues['**'][68][3][2][3][4][18000] = '--alt-preset medium'; // 3.90.3 $KnownEncoderValues['**'][68][4][2][3][4][18000] = '--alt-preset fast medium'; // 3.90.3 $KnownEncoderValues[0xFF][99][1][1][1][2][0] = '--preset studio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0xFF][58][2][1][3][2][20600] = '--preset studio'; // 3.90.3, 3.93.1 $KnownEncoderValues[0xFF][58][2][1][3][2][20500] = '--preset studio'; // 3.93 $KnownEncoderValues[0xFF][57][2][1][3][4][20500] = '--preset studio'; // 3.94, 3.95 $KnownEncoderValues[0xC0][88][1][1][1][2][0] = '--preset cd'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0xC0][58][2][2][3][2][19600] = '--preset cd'; // 3.90.3, 3.93.1 $KnownEncoderValues[0xC0][58][2][2][3][2][19500] = '--preset cd'; // 3.93 $KnownEncoderValues[0xC0][57][2][1][3][4][19500] = '--preset cd'; // 3.94, 3.95 $KnownEncoderValues[0xA0][78][1][1][3][2][18000] = '--preset hifi'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0xA0][58][2][2][3][2][18000] = '--preset hifi'; // 3.90.3, 3.93, 3.93.1 $KnownEncoderValues[0xA0][57][2][1][3][4][18000] = '--preset hifi'; // 3.94, 3.95 $KnownEncoderValues[0x80][67][1][1][3][2][18000] = '--preset tape'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0x80][67][1][1][3][2][15000] = '--preset radio'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0x70][67][1][1][3][2][15000] = '--preset fm'; // 3.90, 3.90.1, 3.90.2, 3.91, 3.92 $KnownEncoderValues[0x70][58][2][2][3][2][16000] = '--preset tape/radio/fm'; // 3.90.3, 3.93, 3.93.1 $KnownEncoderValues[0x70][57][2][1][3][4][16000] = '--preset tape/radio/fm'; // 3.94, 3.95 $KnownEncoderValues[0x38][58][2][2][0][2][10000] = '--preset voice'; // 3.90.3, 3.93, 3.93.1 $KnownEncoderValues[0x38][57][2][1][0][4][15000] = '--preset voice'; // 3.94, 3.95 $KnownEncoderValues[0x38][57][2][1][0][4][16000] = '--preset voice'; // 3.94a14 $KnownEncoderValues[0x28][65][1][1][0][2][7500] = '--preset mw-us'; // 3.90, 3.90.1, 3.92 $KnownEncoderValues[0x28][65][1][1][0][2][7600] = '--preset mw-us'; // 3.90.2, 3.91 $KnownEncoderValues[0x28][58][2][2][0][2][7000] = '--preset mw-us'; // 3.90.3, 3.93, 3.93.1 $KnownEncoderValues[0x28][57][2][1][0][4][10500] = '--preset mw-us'; // 3.94, 3.95 $KnownEncoderValues[0x28][57][2][1][0][4][11200] = '--preset mw-us'; // 3.94a14 $KnownEncoderValues[0x28][57][2][1][0][4][8800] = '--preset mw-us'; // 3.94a15 $KnownEncoderValues[0x18][58][2][2][0][2][4000] = '--preset phon+/lw/mw-eu/sw'; // 3.90.3, 3.93.1 $KnownEncoderValues[0x18][58][2][2][0][2][3900] = '--preset phon+/lw/mw-eu/sw'; // 3.93 $KnownEncoderValues[0x18][57][2][1][0][4][5900] = '--preset phon+/lw/mw-eu/sw'; // 3.94, 3.95 $KnownEncoderValues[0x18][57][2][1][0][4][6200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a14 $KnownEncoderValues[0x18][57][2][1][0][4][3200] = '--preset phon+/lw/mw-eu/sw'; // 3.94a15 $KnownEncoderValues[0x10][58][2][2][0][2][3800] = '--preset phone'; // 3.90.3, 3.93.1 $KnownEncoderValues[0x10][58][2][2][0][2][3700] = '--preset phone'; // 3.93 $KnownEncoderValues[0x10][57][2][1][0][4][5600] = '--preset phone'; // 3.94, 3.95 } if (isset($KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) { $encoder_options = $KnownEncoderValues[$thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; } elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) { $encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']]; } elseif ($info['audio']['bitrate_mode'] == 'vbr') { // http://gabriel.mp3-tech.org/mp3infotag.html // int Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h $LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10); $LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10); $encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value; } elseif ($info['audio']['bitrate_mode'] == 'cbr') { $encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); } else { $encoder_options = strtoupper($info['audio']['bitrate_mode']); } } elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) { $encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr']; } elseif (!empty($info['audio']['bitrate'])) { if ($info['audio']['bitrate_mode'] == 'cbr') { $encoder_options = strtoupper($info['audio']['bitrate_mode']).round($info['audio']['bitrate'] / 1000); } else { $encoder_options = strtoupper($info['audio']['bitrate_mode']); } } if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) { $encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min']; } if (isset($thisfile_mpeg_audio['bitrate']) && $thisfile_mpeg_audio['bitrate'] === 'free') { $encoder_options .= ' --freeformat'; } if (!empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev']) || !empty($thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'])) { $encoder_options .= ' --nogap'; } if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) { $ExplodedOptions = explode(' ', $encoder_options, 4); if ($ExplodedOptions[0] == '--r3mix') { $ExplodedOptions[1] = 'r3mix'; } switch ($ExplodedOptions[0]) { case '--preset': case '--alt-preset': case '--r3mix': if ($ExplodedOptions[1] == 'fast') { $ExplodedOptions[1] .= ' '.$ExplodedOptions[2]; } switch ($ExplodedOptions[1]) { case 'portable': case 'medium': case 'standard': case 'extreme': case 'insane': case 'fast portable': case 'fast medium': case 'fast standard': case 'fast extreme': case 'fast insane': case 'r3mix': static $ExpectedLowpass = array( 'insane|20500' => 20500, 'insane|20600' => 20600, // 3.90.2, 3.90.3, 3.91 'medium|18000' => 18000, 'fast medium|18000' => 18000, 'extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 'extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 'fast extreme|19500' => 19500, // 3.90, 3.90.1, 3.92, 3.95 'fast extreme|19600' => 19600, // 3.90.2, 3.90.3, 3.91, 3.93.1 'standard|19000' => 19000, 'fast standard|19000' => 19000, 'r3mix|19500' => 19500, // 3.90, 3.90.1, 3.92 'r3mix|19600' => 19600, // 3.90.2, 3.90.3, 3.91 'r3mix|18000' => 18000, // 3.94, 3.95 ); if (!isset($ExpectedLowpass[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']]) && ($thisfile_mpeg_audio_lame['lowpass_frequency'] < 22050) && (round($thisfile_mpeg_audio_lame['lowpass_frequency'] / 1000) < round($thisfile_mpeg_audio['sample_rate'] / 2000))) { $encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency']; } break; default: break; } break; } } if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) { if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) { $encoder_options .= ' --resample 44100'; } elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) { $encoder_options .= ' --resample 48000'; } elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) { switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) { case 0: // <= 32000 // may or may not be same as source frequency - ignore break; case 1: // 44100 case 2: // 48000 case 3: // 48000+ $ExplodedOptions = explode(' ', $encoder_options, 4); switch ($ExplodedOptions[0]) { case '--preset': case '--alt-preset': switch ($ExplodedOptions[1]) { case 'fast': case 'portable': case 'medium': case 'standard': case 'extreme': case 'insane': $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; break; default: static $ExpectedResampledRate = array( 'phon+/lw/mw-eu/sw|16000' => 16000, 'mw-us|24000' => 24000, // 3.95 'mw-us|32000' => 32000, // 3.93 'mw-us|16000' => 16000, // 3.92 'phone|16000' => 16000, 'phone|11025' => 11025, // 3.94a15 'radio|32000' => 32000, // 3.94a15 'fm/radio|32000' => 32000, // 3.92 'fm|32000' => 32000, // 3.90 'voice|32000' => 32000); if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) { $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; } break; } break; case '--r3mix': default: $encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate']; break; } break; } } } if (empty($encoder_options) && !empty($info['audio']['bitrate']) && !empty($info['audio']['bitrate_mode'])) { //$encoder_options = strtoupper($info['audio']['bitrate_mode']).ceil($info['audio']['bitrate'] / 1000); $encoder_options = strtoupper($info['audio']['bitrate_mode']); } return $encoder_options; } /** * @param int $offset * @param array $info * @param bool $recursivesearch * @param bool $ScanAsCBR * @param bool $FastMPEGheaderScan * * @return bool */ public function decodeMPEGaudioHeader($offset, &$info, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) { static $MPEGaudioVersionLookup; static $MPEGaudioLayerLookup; static $MPEGaudioBitrateLookup; static $MPEGaudioFrequencyLookup; static $MPEGaudioChannelModeLookup; static $MPEGaudioModeExtensionLookup; static $MPEGaudioEmphasisLookup; if (empty($MPEGaudioVersionLookup)) { $MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); $MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); $MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); $MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); $MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); $MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); } if ($this->fseek($offset) != 0) { $this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset); return false; } //$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame $headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data // MP3 audio frame structure: // $aa $aa $aa $aa [$bb $bb] $cc... // where $aa..$aa is the four-byte mpeg-audio header (below) // $bb $bb is the optional 2-byte CRC // and $cc... is the audio data $head4 = substr($headerstring, 0, 4); $head4_key = getid3_lib::PrintHexBytes($head4, true, false, false); static $MPEGaudioHeaderDecodeCache = array(); if (isset($MPEGaudioHeaderDecodeCache[$head4_key])) { $MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4_key]; } else { $MPEGheaderRawArray = self::MPEGaudioHeaderDecode($head4); $MPEGaudioHeaderDecodeCache[$head4_key] = $MPEGheaderRawArray; } static $MPEGaudioHeaderValidCache = array(); if (!isset($MPEGaudioHeaderValidCache[$head4_key])) { // Not in cache //$MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true); // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1) $MPEGaudioHeaderValidCache[$head4_key] = self::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false); } // shortcut if (!isset($info['mpeg']['audio'])) { $info['mpeg']['audio'] = array(); } $thisfile_mpeg_audio = &$info['mpeg']['audio']; if ($MPEGaudioHeaderValidCache[$head4_key]) { $thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray; } else { $this->warning('Invalid MPEG audio header ('.getid3_lib::PrintHexBytes($head4).') at offset '.$offset); return false; } if (!$FastMPEGheaderScan) { $thisfile_mpeg_audio['version'] = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']]; $thisfile_mpeg_audio['layer'] = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']]; $thisfile_mpeg_audio['channelmode'] = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']]; $thisfile_mpeg_audio['channels'] = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2); $thisfile_mpeg_audio['sample_rate'] = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']]; $thisfile_mpeg_audio['protection'] = !$thisfile_mpeg_audio['raw']['protection']; $thisfile_mpeg_audio['private'] = (bool) $thisfile_mpeg_audio['raw']['private']; $thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']]; $thisfile_mpeg_audio['copyright'] = (bool) $thisfile_mpeg_audio['raw']['copyright']; $thisfile_mpeg_audio['original'] = (bool) $thisfile_mpeg_audio['raw']['original']; $thisfile_mpeg_audio['emphasis'] = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']]; $info['audio']['channels'] = $thisfile_mpeg_audio['channels']; $info['audio']['sample_rate'] = $thisfile_mpeg_audio['sample_rate']; if ($thisfile_mpeg_audio['protection']) { $thisfile_mpeg_audio['crc'] = getid3_lib::BigEndian2Int(substr($headerstring, 4, 2)); } } if ($thisfile_mpeg_audio['raw']['bitrate'] == 15) { // http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0 $this->warning('Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1'); $thisfile_mpeg_audio['raw']['bitrate'] = 0; } $thisfile_mpeg_audio['padding'] = (bool) $thisfile_mpeg_audio['raw']['padding']; $thisfile_mpeg_audio['bitrate'] = $MPEGaudioBitrateLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['bitrate']]; if (($thisfile_mpeg_audio['bitrate'] == 'free') && ($offset == $info['avdataoffset'])) { // only skip multiple frame check if free-format bitstream found at beginning of file // otherwise is quite possibly simply corrupted data $recursivesearch = false; } // For Layer 2 there are some combinations of bitrate and mode which are not allowed. if (!$FastMPEGheaderScan && ($thisfile_mpeg_audio['layer'] == '2')) { $info['audio']['dataformat'] = 'mp2'; switch ($thisfile_mpeg_audio['channelmode']) { case 'mono': if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] <= 192000)) { // these are ok } else { $this->error($thisfile_mpeg_audio['bitrate'].'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); return false; } break; case 'stereo': case 'joint stereo': case 'dual channel': if (($thisfile_mpeg_audio['bitrate'] == 'free') || ($thisfile_mpeg_audio['bitrate'] == 64000) || ($thisfile_mpeg_audio['bitrate'] >= 96000)) { // these are ok } else { $this->error(intval(round($thisfile_mpeg_audio['bitrate'] / 1000)).'kbps not allowed in Layer 2, '.$thisfile_mpeg_audio['channelmode'].'.'); return false; } break; } } if ($info['audio']['sample_rate'] > 0) { $thisfile_mpeg_audio['framelength'] = self::MPEGaudioFrameLength($thisfile_mpeg_audio['bitrate'], $thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['layer'], (int) $thisfile_mpeg_audio['padding'], $info['audio']['sample_rate']); } $nextframetestoffset = $offset + 1; if ($thisfile_mpeg_audio['bitrate'] != 'free') { $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; if (isset($thisfile_mpeg_audio['framelength'])) { $nextframetestoffset = $offset + $thisfile_mpeg_audio['framelength']; } else { $this->error('Frame at offset('.$offset.') is has an invalid frame length.'); return false; } } $ExpectedNumberOfAudioBytes = 0; //////////////////////////////////////////////////////////////////////////////////// // Variable-bitrate headers if (substr($headerstring, 4 + 32, 4) == 'VBRI') { // Fraunhofer VBR header is hardcoded 'VBRI' at offset 0x24 (36) // specs taken from http://minnie.tuhs.org/pipermail/mp3encoder/2001-January/001800.html $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; $thisfile_mpeg_audio['VBR_method'] = 'Fraunhofer'; $info['audio']['codec'] = 'Fraunhofer'; $SideInfoData = substr($headerstring, 4 + 2, 32); $FraunhoferVBROffset = 36; $thisfile_mpeg_audio['VBR_encoder_version'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 4, 2)); // VbriVersion $thisfile_mpeg_audio['VBR_encoder_delay'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 6, 2)); // VbriDelay $thisfile_mpeg_audio['VBR_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 8, 2)); // VbriQuality $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 10, 4)); // VbriStreamBytes $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 14, 4)); // VbriStreamFrames $thisfile_mpeg_audio['VBR_seek_offsets'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 18, 2)); // VbriTableSize $thisfile_mpeg_audio['VBR_seek_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 20, 2)); // VbriTableScale $thisfile_mpeg_audio['VBR_entry_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 22, 2)); // VbriEntryBytes $thisfile_mpeg_audio['VBR_entry_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset + 24, 2)); // VbriEntryFrames $ExpectedNumberOfAudioBytes = $thisfile_mpeg_audio['VBR_bytes']; $previousbyteoffset = $offset; for ($i = 0; $i < $thisfile_mpeg_audio['VBR_seek_offsets']; $i++) { $Fraunhofer_OffsetN = getid3_lib::BigEndian2Int(substr($headerstring, $FraunhoferVBROffset, $thisfile_mpeg_audio['VBR_entry_bytes'])); $FraunhoferVBROffset += $thisfile_mpeg_audio['VBR_entry_bytes']; $thisfile_mpeg_audio['VBR_offsets_relative'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']); $thisfile_mpeg_audio['VBR_offsets_absolute'][$i] = ($Fraunhofer_OffsetN * $thisfile_mpeg_audio['VBR_seek_scale']) + $previousbyteoffset; $previousbyteoffset += $Fraunhofer_OffsetN; } } else { // Xing VBR header is hardcoded 'Xing' at a offset 0x0D (13), 0x15 (21) or 0x24 (36) // depending on MPEG layer and number of channels $VBRidOffset = self::XingVBRidOffset($thisfile_mpeg_audio['version'], $thisfile_mpeg_audio['channelmode']); $SideInfoData = substr($headerstring, 4 + 2, $VBRidOffset - 4); if ((substr($headerstring, $VBRidOffset, strlen('Xing')) == 'Xing') || (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Info')) { // 'Xing' is traditional Xing VBR frame // 'Info' is LAME-encoded CBR (This was done to avoid CBR files to be recognized as traditional Xing VBR files by some decoders.) // 'Info' *can* legally be used to specify a VBR file as well, however. // http://www.multiweb.cz/twoinches/MP3inside.htm //00..03 = "Xing" or "Info" //04..07 = Flags: // 0x01 Frames Flag set if value for number of frames in file is stored // 0x02 Bytes Flag set if value for filesize in bytes is stored // 0x04 TOC Flag set if values for TOC are stored // 0x08 VBR Scale Flag set if values for VBR scale is stored //08..11 Frames: Number of frames in file (including the first Xing/Info one) //12..15 Bytes: File length in Bytes //16..115 TOC (Table of Contents): // Contains of 100 indexes (one Byte length) for easier lookup in file. Approximately solves problem with moving inside file. // Each Byte has a value according this formula: // (TOC[i] / 256) * fileLenInBytes // So if song lasts eg. 240 sec. and you want to jump to 60. sec. (and file is 5 000 000 Bytes length) you can use: // TOC[(60/240)*100] = TOC[25] // and corresponding Byte in file is then approximately at: // (TOC[25]/256) * 5000000 //116..119 VBR Scale // should be safe to leave this at 'vbr' and let it be overriden to 'cbr' if a CBR preset/mode is used by LAME // if (substr($headerstring, $VBRidOffset, strlen('Info')) == 'Xing') { $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; $thisfile_mpeg_audio['VBR_method'] = 'Xing'; // } else { // $ScanAsCBR = true; // $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; // } $thisfile_mpeg_audio['xing_flags_raw'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 4, 4)); $thisfile_mpeg_audio['xing_flags']['frames'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000001); $thisfile_mpeg_audio['xing_flags']['bytes'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000002); $thisfile_mpeg_audio['xing_flags']['toc'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000004); $thisfile_mpeg_audio['xing_flags']['vbr_scale'] = (bool) ($thisfile_mpeg_audio['xing_flags_raw'] & 0x00000008); if ($thisfile_mpeg_audio['xing_flags']['frames']) { $thisfile_mpeg_audio['VBR_frames'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 8, 4)); //$thisfile_mpeg_audio['VBR_frames']--; // don't count header Xing/Info frame } if ($thisfile_mpeg_audio['xing_flags']['bytes']) { $thisfile_mpeg_audio['VBR_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 12, 4)); } //if (($thisfile_mpeg_audio['bitrate'] == 'free') && !empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { //if (!empty($thisfile_mpeg_audio['VBR_frames']) && !empty($thisfile_mpeg_audio['VBR_bytes'])) { if (!empty($thisfile_mpeg_audio['VBR_frames'])) { $used_filesize = 0; if (!empty($thisfile_mpeg_audio['VBR_bytes'])) { $used_filesize = $thisfile_mpeg_audio['VBR_bytes']; } elseif (!empty($info['filesize'])) { $used_filesize = $info['filesize']; $used_filesize -= (isset($info['id3v2']['headerlength']) ? intval($info['id3v2']['headerlength']) : 0); $used_filesize -= (isset($info['id3v1']) ? 128 : 0); $used_filesize -= (isset($info['tag_offset_end']) ? $info['tag_offset_end'] - $info['tag_offset_start'] : 0); $this->warning('MP3.Xing header missing VBR_bytes, assuming MPEG audio portion of file is '.number_format($used_filesize).' bytes'); } $framelengthfloat = $used_filesize / $thisfile_mpeg_audio['VBR_frames']; if ($thisfile_mpeg_audio['layer'] == '1') { // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 //$info['audio']['bitrate'] = ((($framelengthfloat / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; $info['audio']['bitrate'] = ($framelengthfloat / 4) * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 12; } else { // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 //$info['audio']['bitrate'] = (($framelengthfloat - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; $info['audio']['bitrate'] = $framelengthfloat * $thisfile_mpeg_audio['sample_rate'] * (2 / $info['audio']['channels']) / 144; } $thisfile_mpeg_audio['framelength'] = floor($framelengthfloat); } if ($thisfile_mpeg_audio['xing_flags']['toc']) { $LAMEtocData = substr($headerstring, $VBRidOffset + 16, 100); for ($i = 0; $i < 100; $i++) { $thisfile_mpeg_audio['toc'][$i] = ord($LAMEtocData[$i]); } } if ($thisfile_mpeg_audio['xing_flags']['vbr_scale']) { $thisfile_mpeg_audio['VBR_scale'] = getid3_lib::BigEndian2Int(substr($headerstring, $VBRidOffset + 116, 4)); } // http://gabriel.mp3-tech.org/mp3infotag.html if (substr($headerstring, $VBRidOffset + 120, 4) == 'LAME') { // shortcut $thisfile_mpeg_audio['LAME'] = array(); $thisfile_mpeg_audio_lame = &$thisfile_mpeg_audio['LAME']; $thisfile_mpeg_audio_lame['long_version'] = substr($headerstring, $VBRidOffset + 120, 20); $thisfile_mpeg_audio_lame['short_version'] = substr($thisfile_mpeg_audio_lame['long_version'], 0, 9); //$thisfile_mpeg_audio_lame['numeric_version'] = str_replace('LAME', '', $thisfile_mpeg_audio_lame['short_version']); $thisfile_mpeg_audio_lame['numeric_version'] = ''; if (preg_match('#^LAME([0-9\\.a-z]*)#', $thisfile_mpeg_audio_lame['long_version'], $matches)) { $thisfile_mpeg_audio_lame['short_version'] = $matches[0]; $thisfile_mpeg_audio_lame['numeric_version'] = $matches[1]; } if (strlen($thisfile_mpeg_audio_lame['numeric_version']) > 0) { foreach (explode('.', $thisfile_mpeg_audio_lame['numeric_version']) as $key => $number) { $thisfile_mpeg_audio_lame['integer_version'][$key] = intval($number); } //if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.90') { if ((($thisfile_mpeg_audio_lame['integer_version'][0] * 1000) + $thisfile_mpeg_audio_lame['integer_version'][1]) >= 3090) { // cannot use string version compare, may have "LAME3.90" or "LAME3.100" -- see https://github.com/JamesHeinrich/getID3/issues/207 // extra 11 chars are not part of version string when LAMEtag present unset($thisfile_mpeg_audio_lame['long_version']); // It the LAME tag was only introduced in LAME v3.90 // https://wiki.hydrogenaud.io/index.php/LAME#VBR_header_and_LAME_tag // https://hydrogenaud.io/index.php?topic=9933 // Offsets of various bytes in http://gabriel.mp3-tech.org/mp3infotag.html // are assuming a 'Xing' identifier offset of 0x24, which is the case for // MPEG-1 non-mono, but not for other combinations $LAMEtagOffsetContant = $VBRidOffset - 0x24; // shortcuts $thisfile_mpeg_audio_lame['RGAD'] = array('track'=>array(), 'album'=>array()); $thisfile_mpeg_audio_lame_RGAD = &$thisfile_mpeg_audio_lame['RGAD']; $thisfile_mpeg_audio_lame_RGAD_track = &$thisfile_mpeg_audio_lame_RGAD['track']; $thisfile_mpeg_audio_lame_RGAD_album = &$thisfile_mpeg_audio_lame_RGAD['album']; $thisfile_mpeg_audio_lame['raw'] = array(); $thisfile_mpeg_audio_lame_raw = &$thisfile_mpeg_audio_lame['raw']; // byte $9B VBR Quality // This field is there to indicate a quality level, although the scale was not precised in the original Xing specifications. // Actually overwrites original Xing bytes unset($thisfile_mpeg_audio['VBR_scale']); $thisfile_mpeg_audio_lame['vbr_quality'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0x9B, 1)); // bytes $9C-$A4 Encoder short VersionString $thisfile_mpeg_audio_lame['short_version'] = substr($headerstring, $LAMEtagOffsetContant + 0x9C, 9); // byte $A5 Info Tag revision + VBR method $LAMEtagRevisionVBRmethod = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA5, 1)); $thisfile_mpeg_audio_lame['tag_revision'] = ($LAMEtagRevisionVBRmethod & 0xF0) >> 4; $thisfile_mpeg_audio_lame_raw['vbr_method'] = $LAMEtagRevisionVBRmethod & 0x0F; $thisfile_mpeg_audio_lame['vbr_method'] = self::LAMEvbrMethodLookup($thisfile_mpeg_audio_lame_raw['vbr_method']); $thisfile_mpeg_audio['bitrate_mode'] = substr($thisfile_mpeg_audio_lame['vbr_method'], 0, 3); // usually either 'cbr' or 'vbr', but truncates 'vbr-old / vbr-rh' to 'vbr' // byte $A6 Lowpass filter value $thisfile_mpeg_audio_lame['lowpass_frequency'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA6, 1)) * 100; // bytes $A7-$AE Replay Gain // https://web.archive.org/web/20021015212753/http://privatewww.essex.ac.uk/~djmrob/replaygain/rg_data_format.html // bytes $A7-$AA : 32 bit floating point "Peak signal amplitude" if ($thisfile_mpeg_audio_lame['short_version'] >= 'LAME3.94b') { // LAME 3.94a16 and later - 9.23 fixed point // ie 0x0059E2EE / (2^23) = 5890798 / 8388608 = 0.7022378444671630859375 $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = (float) ((getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4))) / 8388608); } else { // LAME 3.94a15 and earlier - 32-bit floating point // Actually 3.94a16 will fall in here too and be WRONG, but is hard to detect 3.94a16 vs 3.94a15 $thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] = getid3_lib::LittleEndian2Float(substr($headerstring, $LAMEtagOffsetContant + 0xA7, 4)); } if ($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'] == 0) { unset($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); } else { $thisfile_mpeg_audio_lame_RGAD['peak_db'] = getid3_lib::RGADamplitude2dB($thisfile_mpeg_audio_lame_RGAD['peak_amplitude']); } $thisfile_mpeg_audio_lame_raw['RGAD_track'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAB, 2)); $thisfile_mpeg_audio_lame_raw['RGAD_album'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAD, 2)); if ($thisfile_mpeg_audio_lame_raw['RGAD_track'] != 0) { $thisfile_mpeg_audio_lame_RGAD_track['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0xE000) >> 13; $thisfile_mpeg_audio_lame_RGAD_track['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x1C00) >> 10; $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x0200) >> 9; $thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_track'] & 0x01FF; $thisfile_mpeg_audio_lame_RGAD_track['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['name']); $thisfile_mpeg_audio_lame_RGAD_track['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['originator']); $thisfile_mpeg_audio_lame_RGAD_track['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_track['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_track['raw']['sign_bit']); if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) { $info['replay_gain']['track']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; } $info['replay_gain']['track']['originator'] = $thisfile_mpeg_audio_lame_RGAD_track['originator']; $info['replay_gain']['track']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_track['gain_db']; } else { unset($thisfile_mpeg_audio_lame_RGAD['track']); } if ($thisfile_mpeg_audio_lame_raw['RGAD_album'] != 0) { $thisfile_mpeg_audio_lame_RGAD_album['raw']['name'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0xE000) >> 13; $thisfile_mpeg_audio_lame_RGAD_album['raw']['originator'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x1C00) >> 10; $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit'] = ($thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x0200) >> 9; $thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'] = $thisfile_mpeg_audio_lame_raw['RGAD_album'] & 0x01FF; $thisfile_mpeg_audio_lame_RGAD_album['name'] = getid3_lib::RGADnameLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['name']); $thisfile_mpeg_audio_lame_RGAD_album['originator'] = getid3_lib::RGADoriginatorLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['originator']); $thisfile_mpeg_audio_lame_RGAD_album['gain_db'] = getid3_lib::RGADadjustmentLookup($thisfile_mpeg_audio_lame_RGAD_album['raw']['gain_adjust'], $thisfile_mpeg_audio_lame_RGAD_album['raw']['sign_bit']); if (!empty($thisfile_mpeg_audio_lame_RGAD['peak_amplitude'])) { $info['replay_gain']['album']['peak'] = $thisfile_mpeg_audio_lame_RGAD['peak_amplitude']; } $info['replay_gain']['album']['originator'] = $thisfile_mpeg_audio_lame_RGAD_album['originator']; $info['replay_gain']['album']['adjustment'] = $thisfile_mpeg_audio_lame_RGAD_album['gain_db']; } else { unset($thisfile_mpeg_audio_lame_RGAD['album']); } if (empty($thisfile_mpeg_audio_lame_RGAD)) { unset($thisfile_mpeg_audio_lame['RGAD']); } // byte $AF Encoding flags + ATH Type $EncodingFlagsATHtype = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xAF, 1)); $thisfile_mpeg_audio_lame['encoding_flags']['nspsytune'] = (bool) ($EncodingFlagsATHtype & 0x10); $thisfile_mpeg_audio_lame['encoding_flags']['nssafejoint'] = (bool) ($EncodingFlagsATHtype & 0x20); $thisfile_mpeg_audio_lame['encoding_flags']['nogap_next'] = (bool) ($EncodingFlagsATHtype & 0x40); $thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] = (bool) ($EncodingFlagsATHtype & 0x80); $thisfile_mpeg_audio_lame['ath_type'] = $EncodingFlagsATHtype & 0x0F; // byte $B0 if ABR {specified bitrate} else {minimal bitrate} $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB0, 1)); if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 2) { // Average BitRate (ABR) $thisfile_mpeg_audio_lame['bitrate_abr'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; } elseif ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1) { // Constant BitRate (CBR) // ignore } elseif ($thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate'] > 0) { // Variable BitRate (VBR) - minimum bitrate $thisfile_mpeg_audio_lame['bitrate_min'] = $thisfile_mpeg_audio_lame['raw']['abrbitrate_minbitrate']; } // bytes $B1-$B3 Encoder delays $EncoderDelays = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB1, 3)); $thisfile_mpeg_audio_lame['encoder_delay'] = ($EncoderDelays & 0xFFF000) >> 12; $thisfile_mpeg_audio_lame['end_padding'] = $EncoderDelays & 0x000FFF; // byte $B4 Misc $MiscByte = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB4, 1)); $thisfile_mpeg_audio_lame_raw['noise_shaping'] = ($MiscByte & 0x03); $thisfile_mpeg_audio_lame_raw['stereo_mode'] = ($MiscByte & 0x1C) >> 2; $thisfile_mpeg_audio_lame_raw['not_optimal_quality'] = ($MiscByte & 0x20) >> 5; $thisfile_mpeg_audio_lame_raw['source_sample_freq'] = ($MiscByte & 0xC0) >> 6; $thisfile_mpeg_audio_lame['noise_shaping'] = $thisfile_mpeg_audio_lame_raw['noise_shaping']; $thisfile_mpeg_audio_lame['stereo_mode'] = self::LAMEmiscStereoModeLookup($thisfile_mpeg_audio_lame_raw['stereo_mode']); $thisfile_mpeg_audio_lame['not_optimal_quality'] = (bool) $thisfile_mpeg_audio_lame_raw['not_optimal_quality']; $thisfile_mpeg_audio_lame['source_sample_freq'] = self::LAMEmiscSourceSampleFrequencyLookup($thisfile_mpeg_audio_lame_raw['source_sample_freq']); // byte $B5 MP3 Gain $thisfile_mpeg_audio_lame_raw['mp3_gain'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB5, 1), false, true); $thisfile_mpeg_audio_lame['mp3_gain_db'] = (getid3_lib::RGADamplitude2dB(2) / 4) * $thisfile_mpeg_audio_lame_raw['mp3_gain']; $thisfile_mpeg_audio_lame['mp3_gain_factor'] = pow(2, ($thisfile_mpeg_audio_lame['mp3_gain_db'] / 6)); // bytes $B6-$B7 Preset and surround info $PresetSurroundBytes = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB6, 2)); // Reserved = ($PresetSurroundBytes & 0xC000); $thisfile_mpeg_audio_lame_raw['surround_info'] = ($PresetSurroundBytes & 0x3800); $thisfile_mpeg_audio_lame['surround_info'] = self::LAMEsurroundInfoLookup($thisfile_mpeg_audio_lame_raw['surround_info']); $thisfile_mpeg_audio_lame['preset_used_id'] = ($PresetSurroundBytes & 0x07FF); $thisfile_mpeg_audio_lame['preset_used'] = self::LAMEpresetUsedLookup($thisfile_mpeg_audio_lame); if (!empty($thisfile_mpeg_audio_lame['preset_used_id']) && empty($thisfile_mpeg_audio_lame['preset_used'])) { $this->warning('Unknown LAME preset used ('.$thisfile_mpeg_audio_lame['preset_used_id'].') - please report to [email protected]'); } if (($thisfile_mpeg_audio_lame['short_version'] == 'LAME3.90.') && !empty($thisfile_mpeg_audio_lame['preset_used_id'])) { // this may change if 3.90.4 ever comes out $thisfile_mpeg_audio_lame['short_version'] = 'LAME3.90.3'; } // bytes $B8-$BB MusicLength $thisfile_mpeg_audio_lame['audio_bytes'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xB8, 4)); $ExpectedNumberOfAudioBytes = (($thisfile_mpeg_audio_lame['audio_bytes'] > 0) ? $thisfile_mpeg_audio_lame['audio_bytes'] : $thisfile_mpeg_audio['VBR_bytes']); // bytes $BC-$BD MusicCRC $thisfile_mpeg_audio_lame['music_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBC, 2)); // bytes $BE-$BF CRC-16 of Info Tag $thisfile_mpeg_audio_lame['lame_tag_crc'] = getid3_lib::BigEndian2Int(substr($headerstring, $LAMEtagOffsetContant + 0xBE, 2)); // LAME CBR if ($thisfile_mpeg_audio_lame_raw['vbr_method'] == 1 && $thisfile_mpeg_audio['bitrate'] !== 'free') { $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; $thisfile_mpeg_audio['bitrate'] = self::ClosestStandardMP3Bitrate($thisfile_mpeg_audio['bitrate']); $info['audio']['bitrate'] = $thisfile_mpeg_audio['bitrate']; //if (empty($thisfile_mpeg_audio['bitrate']) || (!empty($thisfile_mpeg_audio_lame['bitrate_min']) && ($thisfile_mpeg_audio_lame['bitrate_min'] != 255))) { // $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio_lame['bitrate_min']; //} } } } } } else { // not Fraunhofer or Xing VBR methods, most likely CBR (but could be VBR with no header) $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; if ($recursivesearch) { $thisfile_mpeg_audio['bitrate_mode'] = 'vbr'; if ($this->RecursiveFrameScanning($offset, $nextframetestoffset, true)) { $recursivesearch = false; $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; } if ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') { $this->warning('VBR file with no VBR header. Bitrate values calculated from actual frame bitrates.'); } } } } if (($ExpectedNumberOfAudioBytes > 0) && ($ExpectedNumberOfAudioBytes != ($info['avdataend'] - $info['avdataoffset']))) { if ($ExpectedNumberOfAudioBytes > ($info['avdataend'] - $info['avdataoffset'])) { if ($this->isDependencyFor('matroska') || $this->isDependencyFor('riff')) { // ignore, audio data is broken into chunks so will always be data "missing" } elseif (($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])) == 1) { $this->warning('Last byte of data truncated (this is a known bug in Meracl ID3 Tag Writer before v1.3.5)'); } else { $this->warning('Probable truncated file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, only found '.($info['avdataend'] - $info['avdataoffset']).' (short by '.($ExpectedNumberOfAudioBytes - ($info['avdataend'] - $info['avdataoffset'])).' bytes)'); } } else { if ((($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes) == 1) { // $prenullbytefileoffset = $this->ftell(); // $this->fseek($info['avdataend']); // $PossibleNullByte = $this->fread(1); // $this->fseek($prenullbytefileoffset); // if ($PossibleNullByte === "\x00") { $info['avdataend']--; // $this->warning('Extra null byte at end of MP3 data assumed to be RIFF padding and therefore ignored'); // } else { // $this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'); // } } else { $this->warning('Too much data in file: expecting '.$ExpectedNumberOfAudioBytes.' bytes of audio data, found '.($info['avdataend'] - $info['avdataoffset']).' ('.(($info['avdataend'] - $info['avdataoffset']) - $ExpectedNumberOfAudioBytes).' bytes too many)'); } } } if (($thisfile_mpeg_audio['bitrate'] == 'free') && empty($info['audio']['bitrate'])) { if (($offset == $info['avdataoffset']) && empty($thisfile_mpeg_audio['VBR_frames'])) { $framebytelength = $this->FreeFormatFrameLength($offset, true); if ($framebytelength > 0) { $thisfile_mpeg_audio['framelength'] = $framebytelength; if ($thisfile_mpeg_audio['layer'] == '1') { // BitRate = (((FrameLengthInBytes / 4) - Padding) * SampleRate) / 12 $info['audio']['bitrate'] = ((($framebytelength / 4) - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 12; } else { // Bitrate = ((FrameLengthInBytes - Padding) * SampleRate) / 144 $info['audio']['bitrate'] = (($framebytelength - intval($thisfile_mpeg_audio['padding'])) * $thisfile_mpeg_audio['sample_rate']) / 144; } } else { $this->error('Error calculating frame length of free-format MP3 without Xing/LAME header'); } } } if (isset($thisfile_mpeg_audio['VBR_frames']) ? $thisfile_mpeg_audio['VBR_frames'] : '') { switch ($thisfile_mpeg_audio['bitrate_mode']) { case 'vbr': case 'abr': $bytes_per_frame = 1152; if (($thisfile_mpeg_audio['version'] == '1') && ($thisfile_mpeg_audio['layer'] == 1)) { $bytes_per_frame = 384; } elseif ((($thisfile_mpeg_audio['version'] == '2') || ($thisfile_mpeg_audio['version'] == '2.5')) && ($thisfile_mpeg_audio['layer'] == 3)) { $bytes_per_frame = 576; } $thisfile_mpeg_audio['VBR_bitrate'] = (isset($thisfile_mpeg_audio['VBR_bytes']) ? (($thisfile_mpeg_audio['VBR_bytes'] / $thisfile_mpeg_audio['VBR_frames']) * 8) * ($info['audio']['sample_rate'] / $bytes_per_frame) : 0); if ($thisfile_mpeg_audio['VBR_bitrate'] > 0) { $info['audio']['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; $thisfile_mpeg_audio['bitrate'] = $thisfile_mpeg_audio['VBR_bitrate']; // to avoid confusion } break; } } // End variable-bitrate headers //////////////////////////////////////////////////////////////////////////////////// if ($recursivesearch) { if (!$this->RecursiveFrameScanning($offset, $nextframetestoffset, $ScanAsCBR)) { return false; } if (!empty($this->getid3->info['mp3_validity_check_bitrates']) && !empty($thisfile_mpeg_audio['bitrate_mode']) && ($thisfile_mpeg_audio['bitrate_mode'] == 'vbr') && !empty($thisfile_mpeg_audio['VBR_bitrate'])) { // https://github.com/JamesHeinrich/getID3/issues/287 if (count(array_keys($this->getid3->info['mp3_validity_check_bitrates'])) == 1) { list($cbr_bitrate_in_short_scan) = array_keys($this->getid3->info['mp3_validity_check_bitrates']); $deviation_cbr_from_header_bitrate = abs($thisfile_mpeg_audio['VBR_bitrate'] - $cbr_bitrate_in_short_scan) / $cbr_bitrate_in_short_scan; if ($deviation_cbr_from_header_bitrate < 0.01) { // VBR header bitrate may differ slightly from true bitrate of frames, perhaps accounting for overhead of VBR header frame itself? // If measured CBR bitrate is within 1% of specified bitrate in VBR header then assume that file is truly CBR $thisfile_mpeg_audio['bitrate_mode'] = 'cbr'; //$this->warning('VBR header ignored, assuming CBR '.round($cbr_bitrate_in_short_scan / 1000).'kbps based on scan of '.$this->mp3_valid_check_frames.' frames'); } } } if (isset($this->getid3->info['mp3_validity_check_bitrates'])) { unset($this->getid3->info['mp3_validity_check_bitrates']); } } //if (false) { // // experimental side info parsing section - not returning anything useful yet // // $SideInfoBitstream = getid3_lib::BigEndian2Bin($SideInfoData); // $SideInfoOffset = 0; // // if ($thisfile_mpeg_audio['version'] == '1') { // if ($thisfile_mpeg_audio['channelmode'] == 'mono') { // // MPEG-1 (mono) // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); // $SideInfoOffset += 9; // $SideInfoOffset += 5; // } else { // // MPEG-1 (stereo, joint-stereo, dual-channel) // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 9); // $SideInfoOffset += 9; // $SideInfoOffset += 3; // } // } else { // 2 or 2.5 // if ($thisfile_mpeg_audio['channelmode'] == 'mono') { // // MPEG-2, MPEG-2.5 (mono) // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); // $SideInfoOffset += 8; // $SideInfoOffset += 1; // } else { // // MPEG-2, MPEG-2.5 (stereo, joint-stereo, dual-channel) // $thisfile_mpeg_audio['side_info']['main_data_begin'] = substr($SideInfoBitstream, $SideInfoOffset, 8); // $SideInfoOffset += 8; // $SideInfoOffset += 2; // } // } // // if ($thisfile_mpeg_audio['version'] == '1') { // for ($channel = 0; $channel < $info['audio']['channels']; $channel++) { // for ($scfsi_band = 0; $scfsi_band < 4; $scfsi_band++) { // $thisfile_mpeg_audio['scfsi'][$channel][$scfsi_band] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 2; // } // } // } // for ($granule = 0; $granule < (($thisfile_mpeg_audio['version'] == '1') ? 2 : 1); $granule++) { // for ($channel = 0; $channel < $info['audio']['channels']; $channel++) { // $thisfile_mpeg_audio['part2_3_length'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 12); // $SideInfoOffset += 12; // $thisfile_mpeg_audio['big_values'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); // $SideInfoOffset += 9; // $thisfile_mpeg_audio['global_gain'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 8); // $SideInfoOffset += 8; // if ($thisfile_mpeg_audio['version'] == '1') { // $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); // $SideInfoOffset += 4; // } else { // $thisfile_mpeg_audio['scalefac_compress'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 9); // $SideInfoOffset += 9; // } // $thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 1; // // if ($thisfile_mpeg_audio['window_switching_flag'][$granule][$channel] == '1') { // // $thisfile_mpeg_audio['block_type'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 2); // $SideInfoOffset += 2; // $thisfile_mpeg_audio['mixed_block_flag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 1; // // for ($region = 0; $region < 2; $region++) { // $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); // $SideInfoOffset += 5; // } // $thisfile_mpeg_audio['table_select'][$granule][$channel][2] = 0; // // for ($window = 0; $window < 3; $window++) { // $thisfile_mpeg_audio['subblock_gain'][$granule][$channel][$window] = substr($SideInfoBitstream, $SideInfoOffset, 3); // $SideInfoOffset += 3; // } // // } else { // // for ($region = 0; $region < 3; $region++) { // $thisfile_mpeg_audio['table_select'][$granule][$channel][$region] = substr($SideInfoBitstream, $SideInfoOffset, 5); // $SideInfoOffset += 5; // } // // $thisfile_mpeg_audio['region0_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 4); // $SideInfoOffset += 4; // $thisfile_mpeg_audio['region1_count'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 3); // $SideInfoOffset += 3; // $thisfile_mpeg_audio['block_type'][$granule][$channel] = 0; // } // // if ($thisfile_mpeg_audio['version'] == '1') { // $thisfile_mpeg_audio['preflag'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 1; // } // $thisfile_mpeg_audio['scalefac_scale'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 1; // $thisfile_mpeg_audio['count1table_select'][$granule][$channel] = substr($SideInfoBitstream, $SideInfoOffset, 1); // $SideInfoOffset += 1; // } // } //} return true; } /** * @param int $offset * @param int $nextframetestoffset * @param bool $ScanAsCBR * * @return bool */ public function RecursiveFrameScanning(&$offset, &$nextframetestoffset, $ScanAsCBR) { $info = &$this->getid3->info; $firstframetestarray = array('error' => array(), 'warning'=> array(), 'avdataend' => $info['avdataend'], 'avdataoffset' => $info['avdataoffset']); $this->decodeMPEGaudioHeader($offset, $firstframetestarray, false); $info['mp3_validity_check_bitrates'] = array(); for ($i = 0; $i < $this->mp3_valid_check_frames; $i++) { // check next (default: 50) frames for validity, to make sure we haven't run across a false synch if (($nextframetestoffset + 4) >= $info['avdataend']) { // end of file return true; } $nextframetestarray = array('error' => array(), 'warning' => array(), 'avdataend' => $info['avdataend'], 'avdataoffset'=>$info['avdataoffset']); if ($this->decodeMPEGaudioHeader($nextframetestoffset, $nextframetestarray, false)) { /** @phpstan-ignore-next-line */ getid3_lib::safe_inc($info['mp3_validity_check_bitrates'][$nextframetestarray['mpeg']['audio']['bitrate']]); if ($ScanAsCBR) { // force CBR mode, used for trying to pick out invalid audio streams with valid(?) VBR headers, or VBR streams with no VBR header if (!isset($nextframetestarray['mpeg']['audio']['bitrate']) || !isset($firstframetestarray['mpeg']['audio']['bitrate']) || ($nextframetestarray['mpeg']['audio']['bitrate'] != $firstframetestarray['mpeg']['audio']['bitrate'])) { return false; } } // next frame is OK, get ready to check the one after that if (isset($nextframetestarray['mpeg']['audio']['framelength']) && ($nextframetestarray['mpeg']['audio']['framelength'] > 0)) { $nextframetestoffset += $nextframetestarray['mpeg']['audio']['framelength']; } else { $this->error('Frame at offset ('.$offset.') is has an invalid frame length.'); return false; } } elseif (!empty($firstframetestarray['mpeg']['audio']['framelength']) && (($nextframetestoffset + $firstframetestarray['mpeg']['audio']['framelength']) > $info['avdataend'])) { // it's not the end of the file, but there's not enough data left for another frame, so assume it's garbage/padding and return OK return true; } else { // next frame is not valid, note the error and fail, so scanning can contiue for a valid frame sequence $this->warning('Frame at offset ('.$offset.') is valid, but the next one at ('.$nextframetestoffset.') is not.'); return false; } } return true; } /** * @param int $offset * @param bool $deepscan * * @return int|false */ public function FreeFormatFrameLength($offset, $deepscan=false) { $info = &$this->getid3->info; $this->fseek($offset); $MPEGaudioData = $this->fread(32768); $SyncPattern1 = substr($MPEGaudioData, 0, 4); // may be different pattern due to padding $SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) | 0x02).$SyncPattern1[3]; if ($SyncPattern2 === $SyncPattern1) { $SyncPattern2 = $SyncPattern1[0].$SyncPattern1[1].chr(ord($SyncPattern1[2]) & 0xFD).$SyncPattern1[3]; } $framelength = false; $framelength1 = strpos($MPEGaudioData, $SyncPattern1, 4); $framelength2 = strpos($MPEGaudioData, $SyncPattern2, 4); if ($framelength1 > 4) { $framelength = $framelength1; } if (($framelength2 > 4) && ($framelength2 < $framelength1)) { $framelength = $framelength2; } if (!$framelength) { // LAME 3.88 has a different value for modeextension on the first frame vs the rest $framelength1 = strpos($MPEGaudioData, substr($SyncPattern1, 0, 3), 4); $framelength2 = strpos($MPEGaudioData, substr($SyncPattern2, 0, 3), 4); if ($framelength1 > 4) { $framelength = $framelength1; } if (($framelength2 > 4) && ($framelength2 < $framelength1)) { $framelength = $framelength2; } if (!$framelength) { $this->error('Cannot find next free-format synch pattern ('.getid3_lib::PrintHexBytes($SyncPattern1).' or '.getid3_lib::PrintHexBytes($SyncPattern2).') after offset '.$offset); return false; } else { $this->warning('ModeExtension varies between first frame and other frames (known free-format issue in LAME 3.88)'); $info['audio']['codec'] = 'LAME'; $info['audio']['encoder'] = 'LAME3.88'; $SyncPattern1 = substr($SyncPattern1, 0, 3); $SyncPattern2 = substr($SyncPattern2, 0, 3); } } if ($deepscan) { $ActualFrameLengthValues = array(); $nextoffset = $offset + $framelength; while ($nextoffset < ($info['avdataend'] - 6)) { $this->fseek($nextoffset - 1); $NextSyncPattern = $this->fread(6); if ((substr($NextSyncPattern, 1, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 1, strlen($SyncPattern2)) == $SyncPattern2)) { // good - found where expected $ActualFrameLengthValues[] = $framelength; } elseif ((substr($NextSyncPattern, 0, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 0, strlen($SyncPattern2)) == $SyncPattern2)) { // ok - found one byte earlier than expected (last frame wasn't padded, first frame was) $ActualFrameLengthValues[] = ($framelength - 1); $nextoffset--; } elseif ((substr($NextSyncPattern, 2, strlen($SyncPattern1)) == $SyncPattern1) || (substr($NextSyncPattern, 2, strlen($SyncPattern2)) == $SyncPattern2)) { // ok - found one byte later than expected (last frame was padded, first frame wasn't) $ActualFrameLengthValues[] = ($framelength + 1); $nextoffset++; } else { $this->error('Did not find expected free-format sync pattern at offset '.$nextoffset); return false; } $nextoffset += $framelength; } if (count($ActualFrameLengthValues) > 0) { $framelength = intval(round(array_sum($ActualFrameLengthValues) / count($ActualFrameLengthValues))); } } return $framelength; } /** * @return bool */ public function getOnlyMPEGaudioInfoBruteForce() { $MPEGaudioHeaderDecodeCache = array(); $MPEGaudioHeaderValidCache = array(); $MPEGaudioHeaderLengthCache = array(); $MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); $MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); $MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); $MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); $MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); $MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); $LongMPEGversionLookup = array(); $LongMPEGlayerLookup = array(); $LongMPEGbitrateLookup = array(); $LongMPEGpaddingLookup = array(); $LongMPEGfrequencyLookup = array(); $Distribution = array(); $Distribution['bitrate'] = array(); $Distribution['frequency'] = array(); $Distribution['layer'] = array(); $Distribution['version'] = array(); $Distribution['padding'] = array(); $info = &$this->getid3->info; $this->fseek($info['avdataoffset']); $max_frames_scan = 5000; $frames_scanned = 0; $previousvalidframe = $info['avdataoffset']; while ($this->ftell() < $info['avdataend']) { set_time_limit(30); $head4 = $this->fread(4); if (strlen($head4) < 4) { break; } if ($head4[0] != "\xFF") { for ($i = 1; $i < 4; $i++) { if ($head4[$i] == "\xFF") { $this->fseek($i - 4, SEEK_CUR); continue 2; } } continue; } if (!isset($MPEGaudioHeaderDecodeCache[$head4])) { $MPEGaudioHeaderDecodeCache[$head4] = self::MPEGaudioHeaderDecode($head4); } if (!isset($MPEGaudioHeaderValidCache[$head4])) { $MPEGaudioHeaderValidCache[$head4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$head4], false, false); } if ($MPEGaudioHeaderValidCache[$head4]) { if (!isset($MPEGaudioHeaderLengthCache[$head4])) { $LongMPEGversionLookup[$head4] = $MPEGaudioVersionLookup[$MPEGaudioHeaderDecodeCache[$head4]['version']]; $LongMPEGlayerLookup[$head4] = $MPEGaudioLayerLookup[$MPEGaudioHeaderDecodeCache[$head4]['layer']]; $LongMPEGbitrateLookup[$head4] = $MPEGaudioBitrateLookup[$LongMPEGversionLookup[$head4]][$LongMPEGlayerLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['bitrate']]; $LongMPEGpaddingLookup[$head4] = (bool) $MPEGaudioHeaderDecodeCache[$head4]['padding']; $LongMPEGfrequencyLookup[$head4] = $MPEGaudioFrequencyLookup[$LongMPEGversionLookup[$head4]][$MPEGaudioHeaderDecodeCache[$head4]['sample_rate']]; $MPEGaudioHeaderLengthCache[$head4] = self::MPEGaudioFrameLength( $LongMPEGbitrateLookup[$head4], $LongMPEGversionLookup[$head4], $LongMPEGlayerLookup[$head4], $LongMPEGpaddingLookup[$head4], $LongMPEGfrequencyLookup[$head4]); } if ($MPEGaudioHeaderLengthCache[$head4] > 4) { $WhereWeWere = $this->ftell(); $this->fseek($MPEGaudioHeaderLengthCache[$head4] - 4, SEEK_CUR); $next4 = $this->fread(4); if ($next4[0] == "\xFF") { if (!isset($MPEGaudioHeaderDecodeCache[$next4])) { $MPEGaudioHeaderDecodeCache[$next4] = self::MPEGaudioHeaderDecode($next4); } if (!isset($MPEGaudioHeaderValidCache[$next4])) { $MPEGaudioHeaderValidCache[$next4] = self::MPEGaudioHeaderValid($MPEGaudioHeaderDecodeCache[$next4], false, false); } if ($MPEGaudioHeaderValidCache[$next4]) { $this->fseek(-4, SEEK_CUR); $Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] = isset($Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]]) ? ++$Distribution['bitrate'][$LongMPEGbitrateLookup[$head4]] : 1; $Distribution['layer'][$LongMPEGlayerLookup[$head4]] = isset($Distribution['layer'][$LongMPEGlayerLookup[$head4]]) ? ++$Distribution['layer'][$LongMPEGlayerLookup[$head4]] : 1; $Distribution['version'][$LongMPEGversionLookup[$head4]] = isset($Distribution['version'][$LongMPEGversionLookup[$head4]]) ? ++$Distribution['version'][$LongMPEGversionLookup[$head4]] : 1; $Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] = isset($Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])]) ? ++$Distribution['padding'][intval($LongMPEGpaddingLookup[$head4])] : 1; $Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] = isset($Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]]) ? ++$Distribution['frequency'][$LongMPEGfrequencyLookup[$head4]] : 1; if (++$frames_scanned >= $max_frames_scan) { $pct_data_scanned = getid3_lib::SafeDiv($this->ftell() - $info['avdataoffset'], $info['avdataend'] - $info['avdataoffset']); $this->warning('too many MPEG audio frames to scan, only scanned first '.$max_frames_scan.' frames ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.'); foreach ($Distribution as $key1 => $value1) { foreach ($value1 as $key2 => $value2) { $Distribution[$key1][$key2] = $pct_data_scanned ? round($value2 / $pct_data_scanned) : 1; } } break; } continue; } } unset($next4); $this->fseek($WhereWeWere - 3); } } } foreach ($Distribution as $key => $value) { ksort($Distribution[$key], SORT_NUMERIC); } ksort($Distribution['version'], SORT_STRING); $info['mpeg']['audio']['bitrate_distribution'] = $Distribution['bitrate']; $info['mpeg']['audio']['frequency_distribution'] = $Distribution['frequency']; $info['mpeg']['audio']['layer_distribution'] = $Distribution['layer']; $info['mpeg']['audio']['version_distribution'] = $Distribution['version']; $info['mpeg']['audio']['padding_distribution'] = $Distribution['padding']; if (count($Distribution['version']) > 1) { $this->error('Corrupt file - more than one MPEG version detected'); } if (count($Distribution['layer']) > 1) { $this->error('Corrupt file - more than one MPEG layer detected'); } if (count($Distribution['frequency']) > 1) { $this->error('Corrupt file - more than one MPEG sample rate detected'); } $bittotal = 0; foreach ($Distribution['bitrate'] as $bitratevalue => $bitratecount) { if ($bitratevalue != 'free') { $bittotal += ($bitratevalue * $bitratecount); } } $info['mpeg']['audio']['frame_count'] = array_sum($Distribution['bitrate']); if ($info['mpeg']['audio']['frame_count'] == 0) { $this->error('no MPEG audio frames found'); return false; } $info['mpeg']['audio']['bitrate'] = ($bittotal / $info['mpeg']['audio']['frame_count']); $info['mpeg']['audio']['bitrate_mode'] = ((count($Distribution['bitrate']) > 0) ? 'vbr' : 'cbr'); $info['mpeg']['audio']['sample_rate'] = getid3_lib::array_max($Distribution['frequency'], true); $info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; $info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; $info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; $info['audio']['dataformat'] = 'mp'.getid3_lib::array_max($Distribution['layer'], true); $info['fileformat'] = $info['audio']['dataformat']; return true; } /** * @param int $avdataoffset * @param bool $BitrateHistogram * * @return bool */ public function getOnlyMPEGaudioInfo($avdataoffset, $BitrateHistogram=false) { // looks for synch, decodes MPEG audio header $info = &$this->getid3->info; static $MPEGaudioVersionLookup; static $MPEGaudioLayerLookup; static $MPEGaudioBitrateLookup; if (empty($MPEGaudioVersionLookup)) { $MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); $MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); } $this->fseek($avdataoffset); $sync_seek_buffer_size = min(128 * 1024, $info['avdataend'] - $avdataoffset); if ($sync_seek_buffer_size <= 0) { $this->error('Invalid $sync_seek_buffer_size at offset '.$avdataoffset); return false; } $header = $this->fread($sync_seek_buffer_size); $sync_seek_buffer_size = strlen($header); $SynchSeekOffset = 0; $SyncSeekAttempts = 0; $SyncSeekAttemptsMax = 1000; $FirstFrameThisfileInfo = null; while ($SynchSeekOffset < $sync_seek_buffer_size) { if ((($avdataoffset + $SynchSeekOffset) < $info['avdataend']) && !$this->feof()) { if ($SynchSeekOffset > $sync_seek_buffer_size) { // if a synch's not found within the first 128k bytes, then give up $this->error('Could not find valid MPEG audio synch within the first '.round($sync_seek_buffer_size / 1024).'kB'); if (isset($info['audio']['bitrate'])) { unset($info['audio']['bitrate']); } if (isset($info['mpeg']['audio'])) { unset($info['mpeg']['audio']); } if (empty($info['mpeg'])) { unset($info['mpeg']); } return false; } } if (($SynchSeekOffset + 1) >= strlen($header)) { $this->error('Could not find valid MPEG synch before end of file'); return false; } if (($header[$SynchSeekOffset] == "\xFF") && ($header[($SynchSeekOffset + 1)] > "\xE0")) { // possible synch detected if (++$SyncSeekAttempts >= $SyncSeekAttemptsMax) { // https://github.com/JamesHeinrich/getID3/issues/286 // corrupt files claiming to be MP3, with a large number of 0xFF bytes near the beginning, can cause this loop to take a very long time // should have escape condition to avoid spending too much time scanning a corrupt file // if a synch's not found within the first 128k bytes, then give up $this->error('Could not find valid MPEG audio synch after scanning '.$SyncSeekAttempts.' candidate offsets'); if (isset($info['audio']['bitrate'])) { unset($info['audio']['bitrate']); } if (isset($info['mpeg']['audio'])) { unset($info['mpeg']['audio']); } if (empty($info['mpeg'])) { unset($info['mpeg']); } return false; } $FirstFrameAVDataOffset = null; if (!isset($FirstFrameThisfileInfo) && !isset($info['mpeg']['audio'])) { $FirstFrameThisfileInfo = $info; $FirstFrameAVDataOffset = $avdataoffset + $SynchSeekOffset; if (!$this->decodeMPEGaudioHeader($FirstFrameAVDataOffset, $FirstFrameThisfileInfo, false)) { // if this is the first valid MPEG-audio frame, save it in case it's a VBR header frame and there's // garbage between this frame and a valid sequence of MPEG-audio frames, to be restored below unset($FirstFrameThisfileInfo); } } $dummy = $info; // only overwrite real data if valid header found if ($this->decodeMPEGaudioHeader($avdataoffset + $SynchSeekOffset, $dummy, true)) { $info = $dummy; $info['avdataoffset'] = $avdataoffset + $SynchSeekOffset; switch (isset($info['fileformat']) ? $info['fileformat'] : '') { case '': case 'id3': case 'ape': case 'mp3': $info['fileformat'] = 'mp3'; $info['audio']['dataformat'] = 'mp3'; break; } if (isset($FirstFrameThisfileInfo) && isset($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode']) && ($FirstFrameThisfileInfo['mpeg']['audio']['bitrate_mode'] == 'vbr')) { if (!(abs($info['audio']['bitrate'] - $FirstFrameThisfileInfo['audio']['bitrate']) <= 1)) { // If there is garbage data between a valid VBR header frame and a sequence // of valid MPEG-audio frames the VBR data is no longer discarded. $info = $FirstFrameThisfileInfo; $info['avdataoffset'] = $FirstFrameAVDataOffset; $info['fileformat'] = 'mp3'; $info['audio']['dataformat'] = 'mp3'; $dummy = $info; unset($dummy['mpeg']['audio']); $GarbageOffsetStart = $FirstFrameAVDataOffset + $FirstFrameThisfileInfo['mpeg']['audio']['framelength']; $GarbageOffsetEnd = $avdataoffset + $SynchSeekOffset; if ($this->decodeMPEGaudioHeader($GarbageOffsetEnd, $dummy, true, true)) { $info = $dummy; $info['avdataoffset'] = $GarbageOffsetEnd; $this->warning('apparently-valid VBR header not used because could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.'), but did find valid CBR stream starting at '.$GarbageOffsetEnd); } else { $this->warning('using data from VBR header even though could not find '.$this->mp3_valid_check_frames.' consecutive MPEG-audio frames immediately after VBR header (garbage data for '.($GarbageOffsetEnd - $GarbageOffsetStart).' bytes between '.$GarbageOffsetStart.' and '.$GarbageOffsetEnd.')'); } } } if (isset($info['mpeg']['audio']['bitrate_mode']) && ($info['mpeg']['audio']['bitrate_mode'] == 'vbr') && !isset($info['mpeg']['audio']['VBR_method'])) { // VBR file with no VBR header $BitrateHistogram = true; } if ($BitrateHistogram) { $info['mpeg']['audio']['stereo_distribution'] = array('stereo'=>0, 'joint stereo'=>0, 'dual channel'=>0, 'mono'=>0); $info['mpeg']['audio']['version_distribution'] = array('1'=>0, '2'=>0, '2.5'=>0); if ($info['mpeg']['audio']['version'] == '1') { if ($info['mpeg']['audio']['layer'] == 3) { $info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0); } elseif ($info['mpeg']['audio']['layer'] == 2) { $info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 320000=>0, 384000=>0); } elseif ($info['mpeg']['audio']['layer'] == 1) { $info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 64000=>0, 96000=>0, 128000=>0, 160000=>0, 192000=>0, 224000=>0, 256000=>0, 288000=>0, 320000=>0, 352000=>0, 384000=>0, 416000=>0, 448000=>0); } } elseif ($info['mpeg']['audio']['layer'] == 1) { $info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 32000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0, 176000=>0, 192000=>0, 224000=>0, 256000=>0); } else { $info['mpeg']['audio']['bitrate_distribution'] = array('free'=>0, 8000=>0, 16000=>0, 24000=>0, 32000=>0, 40000=>0, 48000=>0, 56000=>0, 64000=>0, 80000=>0, 96000=>0, 112000=>0, 128000=>0, 144000=>0, 160000=>0); } $dummy = array('error'=>$info['error'], 'warning'=>$info['warning'], 'avdataend'=>$info['avdataend'], 'avdataoffset'=>$info['avdataoffset']); $synchstartoffset = $info['avdataoffset']; $this->fseek($info['avdataoffset']); // you can play with these numbers: $max_frames_scan = 50000; $max_scan_segments = 10; // don't play with these numbers: $FastMode = false; $SynchErrorsFound = 0; $frames_scanned = 0; $this_scan_segment = 0; $frames_scan_per_segment = ceil($max_frames_scan / $max_scan_segments); $pct_data_scanned = 0; for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) { $frames_scanned_this_segment = 0; $scan_start_offset = array(); if ($this->ftell() >= $info['avdataend']) { break; } $scan_start_offset[$current_segment] = max($this->ftell(), $info['avdataoffset'] + round($current_segment * (($info['avdataend'] - $info['avdataoffset']) / $max_scan_segments))); if ($current_segment > 0) { $this->fseek($scan_start_offset[$current_segment]); $buffer_4k = $this->fread(4096); for ($j = 0; $j < (strlen($buffer_4k) - 4); $j++) { if (($buffer_4k[$j] == "\xFF") && ($buffer_4k[($j + 1)] > "\xE0")) { // synch detected if ($this->decodeMPEGaudioHeader($scan_start_offset[$current_segment] + $j, $dummy, false, false, $FastMode)) { $calculated_next_offset = $scan_start_offset[$current_segment] + $j + $dummy['mpeg']['audio']['framelength']; if ($this->decodeMPEGaudioHeader($calculated_next_offset, $dummy, false, false, $FastMode)) { $scan_start_offset[$current_segment] += $j; break; } } } } } $synchstartoffset = $scan_start_offset[$current_segment]; while (($synchstartoffset < $info['avdataend']) && $this->decodeMPEGaudioHeader($synchstartoffset, $dummy, false, false, $FastMode)) { $FastMode = true; $thisframebitrate = $MPEGaudioBitrateLookup[$MPEGaudioVersionLookup[$dummy['mpeg']['audio']['raw']['version']]][$MPEGaudioLayerLookup[$dummy['mpeg']['audio']['raw']['layer']]][$dummy['mpeg']['audio']['raw']['bitrate']]; if (empty($dummy['mpeg']['audio']['framelength'])) { $SynchErrorsFound++; $synchstartoffset++; } else { getid3_lib::safe_inc($info['mpeg']['audio']['bitrate_distribution'][$thisframebitrate]); getid3_lib::safe_inc($info['mpeg']['audio']['stereo_distribution'][$dummy['mpeg']['audio']['channelmode']]); getid3_lib::safe_inc($info['mpeg']['audio']['version_distribution'][$dummy['mpeg']['audio']['version']]); $synchstartoffset += $dummy['mpeg']['audio']['framelength']; } $frames_scanned++; if ($frames_scan_per_segment && (++$frames_scanned_this_segment >= $frames_scan_per_segment)) { $this_pct_scanned = getid3_lib::SafeDiv($this->ftell() - $scan_start_offset[$current_segment], $info['avdataend'] - $info['avdataoffset']); if (($current_segment == 0) && (($this_pct_scanned * $max_scan_segments) >= 1)) { // file likely contains < $max_frames_scan, just scan as one segment $max_scan_segments = 1; $frames_scan_per_segment = $max_frames_scan; } else { $pct_data_scanned += $this_pct_scanned; break; } } } } if ($pct_data_scanned > 0) { $this->warning('too many MPEG audio frames to scan, only scanned '.$frames_scanned.' frames in '.$max_scan_segments.' segments ('.number_format($pct_data_scanned * 100, 1).'% of file) and extrapolated distribution, playtime and bitrate may be incorrect.'); foreach ($info['mpeg']['audio'] as $key1 => $value1) { if (!preg_match('#_distribution$#i', $key1)) { continue; } foreach ($value1 as $key2 => $value2) { $info['mpeg']['audio'][$key1][$key2] = round($value2 / $pct_data_scanned); } } } if ($SynchErrorsFound > 0) { $this->warning('Found '.$SynchErrorsFound.' synch errors in histogram analysis'); //return false; } $bittotal = 0; $framecounter = 0; foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitratevalue => $bitratecount) { $framecounter += $bitratecount; if ($bitratevalue != 'free') { $bittotal += ($bitratevalue * $bitratecount); } } if ($framecounter == 0) { $this->error('Corrupt MP3 file: framecounter == zero'); return false; } $info['mpeg']['audio']['frame_count'] = getid3_lib::CastAsInt($framecounter); $info['mpeg']['audio']['bitrate'] = ($bittotal / $framecounter); $info['audio']['bitrate'] = $info['mpeg']['audio']['bitrate']; // Definitively set VBR vs CBR, even if the Xing/LAME/VBRI header says differently $distinct_bitrates = 0; foreach ($info['mpeg']['audio']['bitrate_distribution'] as $bitrate_value => $bitrate_count) { if ($bitrate_count > 0) { $distinct_bitrates++; } } if ($distinct_bitrates > 1) { $info['mpeg']['audio']['bitrate_mode'] = 'vbr'; } else { $info['mpeg']['audio']['bitrate_mode'] = 'cbr'; } $info['audio']['bitrate_mode'] = $info['mpeg']['audio']['bitrate_mode']; } break; // exit while() } } $SynchSeekOffset++; if (($avdataoffset + $SynchSeekOffset) >= $info['avdataend']) { // end of file/data if (empty($info['mpeg']['audio'])) { $this->error('could not find valid MPEG synch before end of file'); if (isset($info['audio']['bitrate'])) { unset($info['audio']['bitrate']); } if (isset($info['mpeg']['audio'])) { unset($info['mpeg']['audio']); } if (isset($info['mpeg']) && (!is_array($info['mpeg']) || empty($info['mpeg']))) { unset($info['mpeg']); } return false; } break; } } $info['audio']['channels'] = $info['mpeg']['audio']['channels']; if ($info['audio']['channels'] < 1) { $this->error('Corrupt MP3 file: no channels'); return false; } $info['audio']['channelmode'] = $info['mpeg']['audio']['channelmode']; $info['audio']['sample_rate'] = $info['mpeg']['audio']['sample_rate']; return true; } /** * @return array */ public static function MPEGaudioVersionArray() { static $MPEGaudioVersion = array('2.5', false, '2', '1'); return $MPEGaudioVersion; } /** * @return array */ public static function MPEGaudioLayerArray() { static $MPEGaudioLayer = array(false, 3, 2, 1); return $MPEGaudioLayer; } /** * @return array */ public static function MPEGaudioBitrateArray() { static $MPEGaudioBitrate; if (empty($MPEGaudioBitrate)) { $MPEGaudioBitrate = array ( '1' => array (1 => array('free', 32000, 64000, 96000, 128000, 160000, 192000, 224000, 256000, 288000, 320000, 352000, 384000, 416000, 448000), 2 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000, 384000), 3 => array('free', 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 160000, 192000, 224000, 256000, 320000) ), '2' => array (1 => array('free', 32000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000, 176000, 192000, 224000, 256000), 2 => array('free', 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000, 144000, 160000), ) ); $MPEGaudioBitrate['2'][3] = $MPEGaudioBitrate['2'][2]; $MPEGaudioBitrate['2.5'] = $MPEGaudioBitrate['2']; } return $MPEGaudioBitrate; } /** * @return array */ public static function MPEGaudioFrequencyArray() { static $MPEGaudioFrequency; if (empty($MPEGaudioFrequency)) { $MPEGaudioFrequency = array ( '1' => array(44100, 48000, 32000), '2' => array(22050, 24000, 16000), '2.5' => array(11025, 12000, 8000) ); } return $MPEGaudioFrequency; } /** * @return array */ public static function MPEGaudioChannelModeArray() { static $MPEGaudioChannelMode = array('stereo', 'joint stereo', 'dual channel', 'mono'); return $MPEGaudioChannelMode; } /** * @return array */ public static function MPEGaudioModeExtensionArray() { static $MPEGaudioModeExtension; if (empty($MPEGaudioModeExtension)) { $MPEGaudioModeExtension = array ( 1 => array('4-31', '8-31', '12-31', '16-31'), 2 => array('4-31', '8-31', '12-31', '16-31'), 3 => array('', 'IS', 'MS', 'IS+MS') ); } return $MPEGaudioModeExtension; } /** * @return array */ public static function MPEGaudioEmphasisArray() { static $MPEGaudioEmphasis = array('none', '50/15ms', false, 'CCIT J.17'); return $MPEGaudioEmphasis; } /** * @param string $head4 * @param bool $allowBitrate15 * * @return bool */ public static function MPEGaudioHeaderBytesValid($head4, $allowBitrate15=false) { return self::MPEGaudioHeaderValid(self::MPEGaudioHeaderDecode($head4), false, $allowBitrate15); } /** * @param array $rawarray * @param bool $echoerrors * @param bool $allowBitrate15 * * @return bool */ public static function MPEGaudioHeaderValid($rawarray, $echoerrors=false, $allowBitrate15=false) { if (!isset($rawarray['synch']) || ($rawarray['synch'] & 0x0FFE) != 0x0FFE) { return false; } static $MPEGaudioVersionLookup; static $MPEGaudioLayerLookup; static $MPEGaudioBitrateLookup; static $MPEGaudioFrequencyLookup; static $MPEGaudioChannelModeLookup; static $MPEGaudioModeExtensionLookup; static $MPEGaudioEmphasisLookup; if (empty($MPEGaudioVersionLookup)) { $MPEGaudioVersionLookup = self::MPEGaudioVersionArray(); $MPEGaudioLayerLookup = self::MPEGaudioLayerArray(); $MPEGaudioBitrateLookup = self::MPEGaudioBitrateArray(); $MPEGaudioFrequencyLookup = self::MPEGaudioFrequencyArray(); $MPEGaudioChannelModeLookup = self::MPEGaudioChannelModeArray(); $MPEGaudioModeExtensionLookup = self::MPEGaudioModeExtensionArray(); $MPEGaudioEmphasisLookup = self::MPEGaudioEmphasisArray(); } if (isset($MPEGaudioVersionLookup[$rawarray['version']])) { $decodedVersion = $MPEGaudioVersionLookup[$rawarray['version']]; } else { echo ($echoerrors ? "\n".'invalid Version ('.$rawarray['version'].')' : ''); return false; } if (isset($MPEGaudioLayerLookup[$rawarray['layer']])) { $decodedLayer = $MPEGaudioLayerLookup[$rawarray['layer']]; } else { echo ($echoerrors ? "\n".'invalid Layer ('.$rawarray['layer'].')' : ''); return false; } if (!isset($MPEGaudioBitrateLookup[$decodedVersion][$decodedLayer][$rawarray['bitrate']])) { echo ($echoerrors ? "\n".'invalid Bitrate ('.$rawarray['bitrate'].')' : ''); if ($rawarray['bitrate'] == 15) { // known issue in LAME 3.90 - 3.93.1 where free-format has bitrate ID of 15 instead of 0 // let it go through here otherwise file will not be identified if (!$allowBitrate15) { return false; } } else { return false; } } if (!isset($MPEGaudioFrequencyLookup[$decodedVersion][$rawarray['sample_rate']])) { echo ($echoerrors ? "\n".'invalid Frequency ('.$rawarray['sample_rate'].')' : ''); return false; } if (!isset($MPEGaudioChannelModeLookup[$rawarray['channelmode']])) { echo ($echoerrors ? "\n".'invalid ChannelMode ('.$rawarray['channelmode'].')' : ''); return false; } if (!isset($MPEGaudioModeExtensionLookup[$decodedLayer][$rawarray['modeextension']])) { echo ($echoerrors ? "\n".'invalid Mode Extension ('.$rawarray['modeextension'].')' : ''); return false; } if (!isset($MPEGaudioEmphasisLookup[$rawarray['emphasis']])) { echo ($echoerrors ? "\n".'invalid Emphasis ('.$rawarray['emphasis'].')' : ''); return false; } // These are just either set or not set, you can't mess that up :) // $rawarray['protection']; // $rawarray['padding']; // $rawarray['private']; // $rawarray['copyright']; // $rawarray['original']; return true; } /** * @param string $Header4Bytes * * @return array|false */ public static function MPEGaudioHeaderDecode($Header4Bytes) { // AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM // A - Frame sync (all bits set) // B - MPEG Audio version ID // C - Layer description // D - Protection bit // E - Bitrate index // F - Sampling rate frequency index // G - Padding bit // H - Private bit // I - Channel Mode // J - Mode extension (Only if Joint stereo) // K - Copyright // L - Original // M - Emphasis if (strlen($Header4Bytes) != 4) { return false; } $MPEGrawHeader = array(); $MPEGrawHeader['synch'] = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4; $MPEGrawHeader['version'] = (ord($Header4Bytes[1]) & 0x18) >> 3; // BB $MPEGrawHeader['layer'] = (ord($Header4Bytes[1]) & 0x06) >> 1; // CC $MPEGrawHeader['protection'] = (ord($Header4Bytes[1]) & 0x01); // D $MPEGrawHeader['bitrate'] = (ord($Header4Bytes[2]) & 0xF0) >> 4; // EEEE $MPEGrawHeader['sample_rate'] = (ord($Header4Bytes[2]) & 0x0C) >> 2; // FF $MPEGrawHeader['padding'] = (ord($Header4Bytes[2]) & 0x02) >> 1; // G $MPEGrawHeader['private'] = (ord($Header4Bytes[2]) & 0x01); // H $MPEGrawHeader['channelmode'] = (ord($Header4Bytes[3]) & 0xC0) >> 6; // II $MPEGrawHeader['modeextension'] = (ord($Header4Bytes[3]) & 0x30) >> 4; // JJ $MPEGrawHeader['copyright'] = (ord($Header4Bytes[3]) & 0x08) >> 3; // K $MPEGrawHeader['original'] = (ord($Header4Bytes[3]) & 0x04) >> 2; // L $MPEGrawHeader['emphasis'] = (ord($Header4Bytes[3]) & 0x03); // MM return $MPEGrawHeader; } /** * @param int|string $bitrate * @param string $version * @param string $layer * @param bool $padding * @param int $samplerate * * @return int|false */ public static function MPEGaudioFrameLength(&$bitrate, &$version, &$layer, $padding, &$samplerate) { static $AudioFrameLengthCache = array(); if (!isset($AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate])) { $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = false; if ($bitrate != 'free') { if ($version == '1') { if ($layer == '1') { // For Layer I slot is 32 bits long $FrameLengthCoefficient = 48; $SlotLength = 4; } else { // Layer 2 / 3 // for Layer 2 and Layer 3 slot is 8 bits long. $FrameLengthCoefficient = 144; $SlotLength = 1; } } else { // MPEG-2 / MPEG-2.5 if ($layer == '1') { // For Layer I slot is 32 bits long $FrameLengthCoefficient = 24; $SlotLength = 4; } elseif ($layer == '2') { // for Layer 2 and Layer 3 slot is 8 bits long. $FrameLengthCoefficient = 144; $SlotLength = 1; } else { // layer 3 // for Layer 2 and Layer 3 slot is 8 bits long. $FrameLengthCoefficient = 72; $SlotLength = 1; } } // FrameLengthInBytes = ((Coefficient * BitRate) / SampleRate) + Padding if ($samplerate > 0) { $NewFramelength = ($FrameLengthCoefficient * $bitrate) / $samplerate; $NewFramelength = floor($NewFramelength / $SlotLength) * $SlotLength; // round to next-lower multiple of SlotLength (1 byte for Layer 2/3, 4 bytes for Layer I) if ($padding) { $NewFramelength += $SlotLength; } $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate] = (int) $NewFramelength; } } } return $AudioFrameLengthCache[$bitrate][$version][$layer][$padding][$samplerate]; } /** * @param float|int $bit_rate * * @return int|float|string */ public static function ClosestStandardMP3Bitrate($bit_rate) { static $standard_bit_rates = array (320000, 256000, 224000, 192000, 160000, 128000, 112000, 96000, 80000, 64000, 56000, 48000, 40000, 32000, 24000, 16000, 8000); static $bit_rate_table = array (0=>'-'); $round_bit_rate = intval(round($bit_rate, -3)); if (!isset($bit_rate_table[$round_bit_rate])) { if ($round_bit_rate > max($standard_bit_rates)) { $bit_rate_table[$round_bit_rate] = round($bit_rate, 2 - strlen($bit_rate)); } else { $bit_rate_table[$round_bit_rate] = max($standard_bit_rates); foreach ($standard_bit_rates as $standard_bit_rate) { if ($round_bit_rate >= $standard_bit_rate + (($bit_rate_table[$round_bit_rate] - $standard_bit_rate) / 2)) { break; } $bit_rate_table[$round_bit_rate] = $standard_bit_rate; } } } return $bit_rate_table[$round_bit_rate]; } /** * @param string $version * @param string $channelmode * * @return int */ public static function XingVBRidOffset($version, $channelmode) { static $XingVBRidOffsetCache = array(); if (empty($XingVBRidOffsetCache)) { $XingVBRidOffsetCache = array ( '1' => array ('mono' => 0x15, // 4 + 17 = 21 'stereo' => 0x24, // 4 + 32 = 36 'joint stereo' => 0x24, 'dual channel' => 0x24 ), '2' => array ('mono' => 0x0D, // 4 + 9 = 13 'stereo' => 0x15, // 4 + 17 = 21 'joint stereo' => 0x15, 'dual channel' => 0x15 ), '2.5' => array ('mono' => 0x15, 'stereo' => 0x15, 'joint stereo' => 0x15, 'dual channel' => 0x15 ) ); } return $XingVBRidOffsetCache[$version][$channelmode]; } /** * @param int $VBRmethodID * * @return string */ public static function LAMEvbrMethodLookup($VBRmethodID) { static $LAMEvbrMethodLookup = array( 0x00 => 'unknown', 0x01 => 'cbr', 0x02 => 'abr', 0x03 => 'vbr-old / vbr-rh', 0x04 => 'vbr-new / vbr-mtrh', 0x05 => 'vbr-mt', 0x06 => 'vbr (full vbr method 4)', 0x08 => 'cbr (constant bitrate 2 pass)', 0x09 => 'abr (2 pass)', 0x0F => 'reserved' ); return (isset($LAMEvbrMethodLookup[$VBRmethodID]) ? $LAMEvbrMethodLookup[$VBRmethodID] : ''); } /** * @param int $StereoModeID * * @return string */ public static function LAMEmiscStereoModeLookup($StereoModeID) { static $LAMEmiscStereoModeLookup = array( 0 => 'mono', 1 => 'stereo', 2 => 'dual mono', 3 => 'joint stereo', 4 => 'forced stereo', 5 => 'auto', 6 => 'intensity stereo', 7 => 'other' ); return (isset($LAMEmiscStereoModeLookup[$StereoModeID]) ? $LAMEmiscStereoModeLookup[$StereoModeID] : ''); } /** * @param int $SourceSampleFrequencyID * * @return string */ public static function LAMEmiscSourceSampleFrequencyLookup($SourceSampleFrequencyID) { static $LAMEmiscSourceSampleFrequencyLookup = array( 0 => '<= 32 kHz', 1 => '44.1 kHz', 2 => '48 kHz', 3 => '> 48kHz' ); return (isset($LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID]) ? $LAMEmiscSourceSampleFrequencyLookup[$SourceSampleFrequencyID] : ''); } /** * @param int $SurroundInfoID * * @return string */ public static function LAMEsurroundInfoLookup($SurroundInfoID) { static $LAMEsurroundInfoLookup = array( 0 => 'no surround info', 1 => 'DPL encoding', 2 => 'DPL2 encoding', 3 => 'Ambisonic encoding' ); return (isset($LAMEsurroundInfoLookup[$SurroundInfoID]) ? $LAMEsurroundInfoLookup[$SurroundInfoID] : 'reserved'); } /** * @param array $LAMEtag * * @return string */ public static function LAMEpresetUsedLookup($LAMEtag) { if ($LAMEtag['preset_used_id'] == 0) { // no preset used (LAME >=3.93) // no preset recorded (LAME <3.93) return ''; } $LAMEpresetUsedLookup = array(); ///// THIS PART CANNOT BE STATIC . for ($i = 8; $i <= 320; $i++) { switch ($LAMEtag['vbr_method']) { case 'cbr': $LAMEpresetUsedLookup[$i] = '--alt-preset '.$LAMEtag['vbr_method'].' '.$i; break; case 'abr': default: // other VBR modes shouldn't be here(?) $LAMEpresetUsedLookup[$i] = '--alt-preset '.$i; break; } } // named old-style presets (studio, phone, voice, etc) are handled in GuessEncoderOptions() // named alt-presets $LAMEpresetUsedLookup[1000] = '--r3mix'; $LAMEpresetUsedLookup[1001] = '--alt-preset standard'; $LAMEpresetUsedLookup[1002] = '--alt-preset extreme'; $LAMEpresetUsedLookup[1003] = '--alt-preset insane'; $LAMEpresetUsedLookup[1004] = '--alt-preset fast standard'; $LAMEpresetUsedLookup[1005] = '--alt-preset fast extreme'; $LAMEpresetUsedLookup[1006] = '--alt-preset medium'; $LAMEpresetUsedLookup[1007] = '--alt-preset fast medium'; // LAME 3.94 additions/changes $LAMEpresetUsedLookup[1010] = '--preset portable'; // 3.94a15 Oct 21 2003 $LAMEpresetUsedLookup[1015] = '--preset radio'; // 3.94a15 Oct 21 2003 $LAMEpresetUsedLookup[320] = '--preset insane'; // 3.94a15 Nov 12 2003 $LAMEpresetUsedLookup[410] = '-V9'; $LAMEpresetUsedLookup[420] = '-V8'; $LAMEpresetUsedLookup[440] = '-V6'; $LAMEpresetUsedLookup[430] = '--preset radio'; // 3.94a15 Nov 12 2003 $LAMEpresetUsedLookup[450] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'portable'; // 3.94a15 Nov 12 2003 $LAMEpresetUsedLookup[460] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'medium'; // 3.94a15 Nov 12 2003 $LAMEpresetUsedLookup[470] = '--r3mix'; // 3.94b1 Dec 18 2003 $LAMEpresetUsedLookup[480] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'standard'; // 3.94a15 Nov 12 2003 $LAMEpresetUsedLookup[490] = '-V1'; $LAMEpresetUsedLookup[500] = '--preset '.(($LAMEtag['raw']['vbr_method'] == 4) ? 'fast ' : '').'extreme'; // 3.94a15 Nov 12 2003 return (isset($LAMEpresetUsedLookup[$LAMEtag['preset_used_id']]) ? $LAMEpresetUsedLookup[$LAMEtag['preset_used_id']] : 'new/unknown preset: '.$LAMEtag['preset_used_id'].' - report to [email protected]'); } }

How To Start Out An Online Online Casino: Costs, Licenses, Games And More

BDM June 26, 2025 Betting for all Leave a comment 580 Views

What Are Usually The Best Way To Make Money At The Casino?

Content

#5 Look For A Reliable Growth Team That Can Turn Your Vision Into Reality
How Does An Online Casino Operate?
How To Make Money Online: 8 Work-from-home Jobs To Pick From
How To Gain From Casino Additional Bonuses With Online Slots
Choosing In Addition To Playing Games
Tips Approach Have Got Fun Playing Online Baccarat
Web Development
Online Casino Benefits Over The Players
How We Create Money
Avoid Sketchy Sites
Do Gambling Dens Report Gambling Earnings To The Irs?
Find And Protected Popular Payment Methods
Sign In To Read The Total Article”
Cryptos Set To Explode Before The Particular Bitcoin Halving According To Chatgpt: Cardano (ada), Everlodge (eldg), Tron (trx)
Swing The Odds In Your Favour
Summary Of How To Be Able To Create An Internet Casino
What Taxes Are Owing On Gambling Earnings?
Ea Fc 24 Best Cb Players
Markets
What May Be The Maximum Amount Associated With Money That Somebody Can Win At An Online Casino?
Make Money Along With Online Casinos
About This Article
Online Casinos And Profitability: How Carry Out They Make Funds?
Tips – How You Can Win In A Good Internet Casino To Create Consistent Profits
Tips
Your Message Was Sent Successfully Thanks!
Crypto Casinos
Secure Verified Strategies Of Payment
What Are The Best Way To Make Money At The Casino?
Choose An Online Casino Site With The Generous Bonus Offer
How On The Internet Casinos Make Their Profit
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These businesses are not really exercises in charitable organisation – rather, they sell players the possibility to win greater prizes for money they are willing to bet. If you go to a land-based on line casino, you need to place the bet so as to play. Namely, a large number of web sites are offering free play sessions for most popular game titles. No one wants to be called a quitter, but there are times when you will be playing casino video games whenever you simply have got to stop. The only reason exactly why experienced players recommend this is actually the fact that you have a lot more than your pride to lose here – you can lose all your current money.

Do an individual play casino game titles on an everyday basis for even more than a few hours?
Obviously, the online casino you’ve selected has a great influence on your achievement as a player as well.
In many casino sites, a person can start along with the demo editions of these on line casino games to know gaming concepts prior to making usage of your current real money.
There are not different setups showing how an online casino could be operated.
There is a built-in random number generator algorithm within each casino game.

There’s a pre-determined Return To Player figure, which can either be arranged by the software creator or the casino alone. CasinoWizard’s life quest is always to seek away trustworthy online gambling dens that offer on-line slots in the particular highest RTP setups. Well, while it’s believed to become the particular biggest market with regard to online casinos immediately, you need a separate license each state that approves on-line casino gambling. This is one regarding the main reasons why online casinos are less eager on players making minimum deposits and withdrawals all the particular time. Keep inside mind that most online casinos offer the same games, so there are few variables that distinguish them from your rest.

#5 Find A Reliable Advancement Team That May Turn Your Eyesight Into Reality

Whilst revenues from video games are guaranteed, what do casinos carry out to maximise their own earnings? To achieve success in the lengthy run, an on-line casino always requires to get fresh customers, ensure of which those customers are playing frequently and are delighted and stay set.” “[newline]Every online casino’s objective is the same — people pay to play a broad range of casino games. Every game is based on luck, and players invest a specific amount pounds and hope to be able to win more. Beyond general marketing techniques and commission-seeking, online casinos will likewise host games that have specific Return to Player (RTP) proportions mostbet login.

But become aware also in case there is a new maximum limit for withdrawing funds.
The bottom line is the fact players won’t go to your new internet site on its own, but a person need to be known as if you’re not seen; a person don’t exist.
These businesses are not exercises in charitable organisation – rather, that they sell players the opportunity to win bigger prizes for cash they are willing to bet.
This way, you could be able to develop your app without having a gambling license.
All in our content is written by ourselves and we are very pleased to be AI-proof.
This approach, you will possess a general idea of your accessible funds and you will be capable to place reasonable wagers that correspond in order to your bankroll.

These casinos eliminate the long withdrawal, registration in addition to deposit processes and let players to quickly start playing. Most of these casinos have teamed upward with Trustly, the fintech giant, which created a mechanism for players to bypass the normal processes. Therefore, to enjoy the maximum income and high go back on investments obtainable on this sort of business, a person must also become ready to pay for typically the required sacrifices. An RTP above this is well known as very generous – and many sport developers offer slot machines on which casinos may set RTPs over a sliding scale.

How Does An Online Casino Operate?

Though most casino video games are easy to understand, most of them take some time to master. So, as a gambler aiming to make money regularly, you must cautiously understand the regulations as well as how to play the particular games well. The very first thing that a person need to realize if you need to make money from an on-line casino, is that you need an advantage.

The greatest goal of each player is always to understand how to efficiently get paid from on-line casino bonuses.
This may help you save on costs and time while still enabling you to tailor your product.
In addition to the open elements, system must offer APIs so that it is possible to define extensions.
To deal with these jobs, you will need a devoted employee who runs these requirements plus ensures that almost all regulations are implemented correctly.
In the long run, all players will shed 5% of these cash to the on line casino which pays champions 95% as cashback.

Otherwise, it will probably be” “a costly mistake and an obstacle to getting to a profitable business. In this article, all of us will take you on a quest where we provide you insights directly into how to start and function an internet casino. So, you already been having several thoughts of beginning your own online casino, or maybe you might be just curious about how it just about all works.

How To Make Money Online: 8 Work-from-home Jobs To Choose From

You could also try setting oneself a time limit for gaming online. Aside coming from winning big on games, do an individual know how in order to make money from the casino? If you’re a normal gambler playing with big sums, an individual might be entitled to extra additional bonuses or cash mostbet app.

Blackjack is one of the world’s most favored casino games and one of the most profitable for players.
The registration process is smooth, and gamers usually don’t need to send a number of documents to be able to prove their personal or incomes, as is the situation in most regulated markets.
Games where it’s Player vs. Gamer will often possess an entrance payment.
Keep in mind that most online casinos offer you the same games, so there are very few variables that distinguish them from your rest.

This way, you might be able to build your app without having a gambling certificate. Nevertheless, your software must meet the other legal needs mentioned earlier. You should also consider cryptocurrency as the entire online online casino industry is relocating to this field as well. You’ll also need to offer several rewarding bonuses and promotions, especially within the early days and nights, so that you can quickly appeal to high quantities of players.

How To Gain From Casino Bonus Deals With Online Slots

It is obviously recommended to conduct proper research before choosing online casinos or applications, whether you are a beginner or an experienced casino player. Reading reviews submitted by other users can be a helpful way to gain more information in regards to a site. These reviews may provide valuable ideas from people that have already had some experience with the site. Slot devices are one regarding the most fun-packed games in the particular great casinos.

This article provides a step-by-step guide to help an individual navigate setting up your online online casino. It includes specified information, from buying the necessary licenses and” “licences to choosing typically the right software and payment processing remedies. Reading site testimonials before trusting it with your cash is also a new good idea. Furthermore, the casino’s style and navigation should be clear and user-friendly, particularly if these people market themselves since the best and most trustworthy in the commercial. It’s also essential to know the least and maximum wagering limits and to be able to inquire using the specialized support team about the maximum payout for large winnings.

Choosing Plus Playing Games

For example, the particular RTP of a new slot game may dictate how very much money it provides to players above the course of its lifetime (often several years). This means that the casino would not respect the break-even rule to be able to allow players in order to earn their full amount. In the particular long run, all players will drop 5% of these money to the online casino which pays winners 95% as procuring. Although this house edge appears to be able to be small , and the cumulative amount is usually massive, thinking about the hefty wagers that each players exchange within the high stakes casinos. Online gambling has turn out to be legal across the handful of declares over the last decade, while online sports betting made a much greater push across typically the country.

You’ll range from the amount of your earnings when you record your” “tax return for the year rather than at the casino when you claim them.
They are typically recommended to even more advanced business owners who wish to have more say within the small things.
How to make money in casino is a frequent query these days of course, if you are seeking for an response to this query look no even more.
With Player versus. Casino, the casino will use a specific RTP, which is usually programmed into the particular game.
Don’t get sucked into becoming superstitious because there’s simply no way to control a game’s outcome.
Today, some casinos function over 1, 500 slot games, and many game companies still publish new titles every year.

With” “the change, emerging on-line gaming companies for example DraftKings and incumbent casinos’ online procedures give them even more ways to get to the betting public as opposed to the way ever before. The reasons why it will be so important to get familiar together with these factors is usually that thanks to them, you will be able to be able to determine the most beneficial game for an individual. Generally speaking, typically the higher the home edge, the lower the probabilities are to win the sport.

Tips In Order To Have Got Fun Playing Online Baccarat

Obviously, you should never play with money you have to pay your bills or perhaps cover your daily demands. As this stating goes – have fun with money that you could afford to shed. Don’t forget that will online casinos are usually available 24/7 in addition to there’s do not need be in a be quick when visiting these internet sites. First and primarily, you should understand that not all casino games have similar odds. As the matter of truth, many of them have very much better odds as compared to others. For example, online slot games have some from the worst odds you will find in this business.

If an individual check out a land-based casino, you have to place the bet to be able to perform.
These games are not really only fun to play but are usually also extremely exciting.
This is just what brings the enjoyment, excitement, and high quality gaming for your on-line casino.
Make certain to supply the most popular banking methods so players can quickly deposit and take away from the casino.

There are many casino game titles like slot game titles, roulette, and keno where you can find amazing jackpots. In some cases, these jackpots will be worth hundreds regarding thousands of bucks. But, if an individual are thinking about obtaining a way in order to win a jackpot feature like this, you may realize that you will realize that the particular odds of succeeding are extremely minimal. This means that will you don’t possess to invest any of your funds to try out a video game there. Obviously, this specific also means of which you won’t be able to earn money, but you should understand this as a new way to generate money in on the internet casinos over time.

Web Development

But what’s known for sure is that each of these people has specific units of rules. So, before you commence playing on a new casino site, make sure that you understand the fundamentals of the sport you are looking at. It would be even better if you spend several time reading guides that can aid master that game. One of the particular things that create casino sites thus exciting and popular is that an individual can get entry to hundreds of games. On the some other hand, there” “are some casino games with excellent odds.

Gambling will be unpredictable, and one must realize that it is not wise to invest their finances at risk as there is constantly an opportunity of losing.
Despite RTPs becoming seemingly balanced in the direction of the gamer, these statistics indicate that there will always become an assurance of come back to a casino.
The least difficult and quickest technique is the White Label solution, and it takes around a couple of to three months.
With that at heart, I wanted to offer you an in depth review of the actions take to start an online casino.
If functioning in order to” “live casinos, they obtain profit from game titles while there is no randomly number generator.

You won’t become able to any casino without repayment processors, so you’ll have to help to make” “deals with reputable payment companies. Now that I’ve covered most of the important things about starting and working an online casino let’s take a quick look at the actions you need to take to open it yourself. Many regulatory bodies within the world offer licenses to internet casinos and other gambling websites. Despite RTPs becoming seemingly balanced towards the ball player, these figures indicate that presently there will always become guaranteed of go back to a casino. Players can also keep on to expect completely random gameplay – for example, a great RTP of 97% isn’t an assurance that they will certainly lose just 3% of times. How to be able to make money at casino is a frequent issue these days and if you are seeking for an solution to this query look no even more.

Online Casino Benefits Over The Players

ECOGRA may be the online playing industry’s independent limiter and they evaluate online casinos to be sure they’re secure regarding players. If you would like” “for making money with on the internet casinos, you have got to take some time to be able to prepare and learn each of the subtleties in the industry. For instance, you need to know which game titles are beneficial in addition to which ones don’t have decent probabilities. In addition, you have to possess virtues such as patience and discipline as they play a crucial role inside this process.

Last but not minimum, many gambling specialists advise that the best way to make money with on the internet casinos is in order to aim at making small, achievable income rather than colossal amounts.
Most of the particular casinos have an on line casino VIP program that is used to be able to rank players of which are entitled to this reward.
First of all, there’s blackjack, a card game with typical odds that move below 1%.
We’ll cover several matters, including considering particular game strategies, money management tips, and how to maximize bonuses for a new rewarding gaming encounter.

We all know of which online casinos make a fortune, as the latest estimates recommend that the online gambling market is usually worth a staggering $66. 7 billion. Having a strategy get is just as essential as” “using a strategy for your moves when applicable. What is even more, without a dependable plan for your own bankroll, you will be bound to lose all of your own winnings.

How We Make Money

And as we keep mentioning, you need a solid partner that knows how to design and develop a quality casino software. It is crucial to keep in mind that creating a dedicated on line casino app will require a larger budget compared to building an MVP. But if” “you could have the resources, the dedicated app may be a fantastic way to ensure your product is top-notch. Your casino application needs to become able to stand out in a sea of competition.

However, the casinos bank on some gamers being reckless since it’s another method for them to ensure they win more as compared to those players.
To successfully acquire new players, you’ll want to be able to use targeted text messages.
Make sure to usually look at the minimum bet limit a particular game has as this is the total amount that you will be required to spot every time inside order to remain in the game.
With prototypes of your slots, we can quickly show you how your online casino will look and feel.

CasinoWizard comes with an expert team of 4 slots- and internet casino enthusiasts with more than 50 combined a lot of experience. Yes, not only does the old shield dominate the on-line casino landscape, but some new traders have made a great impact, too. Isn´t it enough in order to provide players with the most known payment strategies like VISA, Master card, and Bank transactions?

Avoid Sketchy Sites

Analytics Insight® is an influential platform dedicated to information, trends, and opinion from the globe of data-driven technologies. It monitors innovations, recognition, and achievements made by Synthetic Intelligence, Big Data and Analytics companies across the globe. Analytics Insight will be an influential system dedicated to information, trends, and views from your world of data-driven technologies. The options are increasing, but a good way to employ them is to be able to gamble online. Do your quest and possess a proper technique plan ready regarding what markets you would like to target and exactly why.” “[newline]Latin America is increasing, but again, you need some being familiar with of those marketplaces and correctly translated content. One sure way to are unsuccessful is to use poorly converted content, so pay out attention to them.

These events often require an entry fee but allow gamers to win money by gambling.
There are numerous ways you can leverage your online casino to help to make money.
But it offers the advantage of being higher than a cashable added bonus (hence a larger playing bankroll) even though also the gambling requirements will end up being higher.
Winnings that exceed either $600 or 300 times your initial wager must be reported in a horse racing track.

Are used to entice participants to keep placing bets because they will are offered if you reload your account. Loyalty bonuses will be rewards for players that have advanced in levels because associated with long term engagement with the on line casino. Most of the casinos possess a casino VIP program of which is used to be able to rank players that are eligible for this reward. Casino” “procuring bonuses involve the refunds you obtain whenever you register a streak of loss. How to make money from on-line casino bonuses is now a common training within the gaming world.

Do Internet Casinos Report Gambling Revenue To The Internal Revenue Service?

The right and scalable platform plays a role of a skeleton for your business and determines how easy it is to develop and grow your casino app. With prototypes of your slot machines, we can quickly demonstrate how your online casino will look and feel. We can also help you with the more technical aspects, such as setting up a payment gateway and choosing the right hosting solution.

You need to provide players a cause to choose your on the internet casino instead of a competitor next time they wish to play.
You can perform live commentary, communicate with the talk functionality, or create banter between gamers (if applicable).
This is the hard reality, and you need to realize what you are usually getting into before investing time in addition to money into releasing your own casinos.

You must furthermore integrate the necessary features like repayment systems and user accounts management. The point is the fact when you run your own personal online casino, a person decide if you permit players spin together with the best odds or with RTPs that increase your current chances of creating a profitable business. The most popular on line casino games are slots, poker, blackjack, and roulette. Online casino business is a profitable business that is desirable to learn by interested business-minded individuals regardless of their previous experience. The enterprise has” “turned into one of the leading internet businesses in the world today that provides maximum profit over a relatively quick period of period.

Find And Safe Popular Payment Methods

Players can easily still hit huge wins when enjoying on lower RTP versions, but their particular balances will dry up faster as compared to when playing around the best-paying options. Most players have zero idea that these alternatives even exist and automatically imagine they always play on typically the best-paying version any time in reality the contrary might be real. Make sure of which whoever does these kinds of negotiations to suit your needs provides previous experience of how these deals should be made in addition to knowledge about typically the going rates.

To achieve success at internet marketer marketing, choosing reliable and trustworthy on-line casinos with good alteration rates is important.
Pay N Play casinos gather the players’ banking details via Trustly therefore that players can skip right in order to the deposit.
This number, of program, translates into over 90% of individuals who lose big time in the particular gambling industry.
Another good advice related to casino game titles and learning these kinds of games is to be able to play 1 or 2 various types of video games at once.

The house edge is the expression which describes typically the built-in advantage regarding the casino or in other phrases, the proportion of almost all wagered money that you are anticipated to get involved typically the long term. To achieve success at internet marketer marketing, choosing trustworthy and trustworthy on the internet casinos with high transformation rates is important. To attract prospective players, you may create content such as reviews, guides, or even comparisons on the web site or social networking stations. For instance, a person can create a list of top websites and gives users to play with a 5 dollar deposit casino or even other low-deposit websites. Live casino video games are completely diverse ball games in addition to work by using a residence edge. They assure profits to the on-line casino in the long run, although.

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Having a new” “casino with real retailers and live video clip streaming features will be fundamental for your own business. SoftGamings may offer any sport beyond this listing, guaranteed to become the great source associated with entertainment. While that is true of which it is possible to make money with online casinos, an individual should always view gambling mainly being a source of amusement. Bear in brain that all on line casino games have the built-in advantage which often will eventually trigger you to shed money. Therefore, that is best to be able to simply benefit from the casino game which you have chosen in addition to make the just about all of your time online. If you play skill-based games and possess a money administration strategy, you could have enjoyment and at typically the same time, make money.

Stick to game titles where your ability can give an individual an advantage on the casino – make use of our best strategy with regard to roulette guide in roulette such as.
Ok, so an individual decided to possibly look into creating your own platform or go for the package alternative where you get almost all of the time consuming elements served over a silver platter.
In the end, be aware that it will most likely take you mainly because many as two years to break even.
Now that I’ve covered most regarding the essential things about starting and working an online casino let’s take a quick look at the methods you need to take to open up it yourself.
Today, the best payment methods inside casinos are e-wallets and cryptocurrency.

There are shared benefits to delightful offers and continuous promotions that players come across frequently at online casinos. For example, the casino offering a no-deposit bonus will give a new gamer the opportunity to try the game free of charge without risk. For typically the casino, there’s a new chance that said player will determine to join plus play more games, this time with real money. Another important factor to think about when choosing an internet casino is the number of available video games. The more video games a website offers, typically the more appealing it is to customers, and a wide assortment of games often indicates high site visitors levels.

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The more gamers you might have and the more money they invest, the additional the casino will earn. That’s since although the games” “are based on luck, in the grand scheme regarding things, the online casino will always make more than it manages to lose. The gambling online business is rising, plus more and additional players are becoming a member of it, so there’s always space for a new businessperson to enter typically the fold. Do you play casino games on a daily basis for more than a few hours? If the answers to be able to these questions will be affirmative, then probably it’s time to stop to check out assist.

However, given that you get amused by playing a casino game, presently there are only 2 possible outcomes – to either succeed or lose. Therefore, the inevitable query whether or not necessarily it is possible to building income with on-line casinos arises. Another thing that comes to mind is usually whether some online casino games truly offer better odds.

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