/** * * @param type $RIFFdata * @return boolean */ public function ParseRIFFdata(&$RIFFdata) { $info =& $this->getid3->info; if ($RIFFdata) { $tempfile = tempnam(GetId3_GetId3::getTempDir(), 'getID3'); $fp_temp = fopen($tempfile, 'wb'); $RIFFdataLength = strlen($RIFFdata); $NewLengthString = GetId3_Lib_Helper::LittleEndian2String($RIFFdataLength, 4); for ($i = 0; $i < 4; $i++) { $RIFFdata[$i + 4] = $NewLengthString[$i]; } fwrite($fp_temp, $RIFFdata); fclose($fp_temp); $getid3_temp = new GetId3_GetId3(); $getid3_temp->openfile($tempfile); $getid3_temp->info['filesize'] = $RIFFdataLength; $getid3_temp->info['filenamepath'] = $info['filenamepath']; $getid3_temp->info['tags'] = $info['tags']; $getid3_temp->info['warning'] = $info['warning']; $getid3_temp->info['error'] = $info['error']; $getid3_temp->info['comments'] = $info['comments']; $getid3_temp->info['audio'] = isset($info['audio']) ? $info['audio'] : array(); $getid3_temp->info['video'] = isset($info['video']) ? $info['video'] : array(); $getid3_riff = new GetId3_Module_AudioVideo_Riff($getid3_temp); $getid3_riff->Analyze(); $info['riff'] = $getid3_temp->info['riff']; $info['warning'] = $getid3_temp->info['warning']; $info['error'] = $getid3_temp->info['error']; $info['tags'] = $getid3_temp->info['tags']; $info['comments'] = $getid3_temp->info['comments']; unset($getid3_riff, $getid3_temp); unlink($tempfile); } return false; }
/** * * @return boolean */ public function Analyze() { $info =& $this->getid3->info; fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET); $LPACheader = fread($this->getid3->fp, 14); if (substr($LPACheader, 0, 4) != 'LPAC') { $info['error'][] = 'Expected "LPAC" at offset ' . $info['avdataoffset'] . ', found "' . $StreamMarker . '"'; return false; } $info['avdataoffset'] += 14; $info['fileformat'] = 'lpac'; $info['audio']['dataformat'] = 'lpac'; $info['audio']['lossless'] = true; $info['audio']['bitrate_mode'] = 'vbr'; $info['lpac']['file_version'] = GetId3_Lib_Helper::BigEndian2Int(substr($LPACheader, 4, 1)); $flags['audio_type'] = GetId3_Lib_Helper::BigEndian2Int(substr($LPACheader, 5, 1)); $info['lpac']['total_samples'] = GetId3_Lib_Helper::BigEndian2Int(substr($LPACheader, 6, 4)); $flags['parameters'] = GetId3_Lib_Helper::BigEndian2Int(substr($LPACheader, 10, 4)); $info['lpac']['flags']['is_wave'] = (bool) ($flags['audio_type'] & 0x40); $info['lpac']['flags']['stereo'] = (bool) ($flags['audio_type'] & 0x4); $info['lpac']['flags']['24_bit'] = (bool) ($flags['audio_type'] & 0x2); $info['lpac']['flags']['16_bit'] = (bool) ($flags['audio_type'] & 0x1); if ($info['lpac']['flags']['24_bit'] && $info['lpac']['flags']['16_bit']) { $info['warning'][] = '24-bit and 16-bit flags cannot both be set'; } $info['lpac']['flags']['fast_compress'] = (bool) ($flags['parameters'] & 0x40000000); $info['lpac']['flags']['random_access'] = (bool) ($flags['parameters'] & 0x8000000); $info['lpac']['block_length'] = pow(2, ($flags['parameters'] & 0x7000000) >> 24) * 256; $info['lpac']['flags']['adaptive_prediction_order'] = (bool) ($flags['parameters'] & 0x800000); $info['lpac']['flags']['adaptive_quantization'] = (bool) ($flags['parameters'] & 0x400000); $info['lpac']['flags']['joint_stereo'] = (bool) ($flags['parameters'] & 0x40000); $info['lpac']['quantization'] = ($flags['parameters'] & 0x1f00) >> 8; $info['lpac']['max_prediction_order'] = $flags['parameters'] & 0x3f; if ($info['lpac']['flags']['fast_compress'] && $info['lpac']['max_prediction_order'] != 3) { $info['warning'][] = 'max_prediction_order expected to be "3" if fast_compress is true, actual value is "' . $info['lpac']['max_prediction_order'] . '"'; } switch ($info['lpac']['file_version']) { case 6: if ($info['lpac']['flags']['adaptive_quantization']) { $info['warning'][] = 'adaptive_quantization expected to be false in LPAC file stucture v6, actually true'; } if ($info['lpac']['quantization'] != 20) { $info['warning'][] = 'Quantization expected to be 20 in LPAC file stucture v6, actually ' . $info['lpac']['flags']['Q']; } break; default: //$info['warning'][] = 'This version of GetId3() ['.$this->getid3->version().'] only supports LPAC file format version 6, this file is version '.$info['lpac']['file_version'].' - please report to info@getid3.org'; break; } $getid3_temp = new GetId3_GetId3(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info = $info; $getid3_riff = new GetId3_Module_AudioVideo_Riff($getid3_temp); $getid3_riff->Analyze(); $info['avdataoffset'] = $getid3_temp->info['avdataoffset']; $info['riff'] = $getid3_temp->info['riff']; $info['error'] = $getid3_temp->info['error']; $info['warning'] = $getid3_temp->info['warning']; $info['lpac']['comments']['comment'] = $getid3_temp->info['comments']; $info['audio']['sample_rate'] = $getid3_temp->info['audio']['sample_rate']; unset($getid3_temp, $getid3_riff); $info['audio']['channels'] = $info['lpac']['flags']['stereo'] ? 2 : 1; if ($info['lpac']['flags']['24_bit']) { $info['audio']['bits_per_sample'] = $info['riff']['audio'][0]['bits_per_sample']; } elseif ($info['lpac']['flags']['16_bit']) { $info['audio']['bits_per_sample'] = 16; } else { $info['audio']['bits_per_sample'] = 8; } if ($info['lpac']['flags']['fast_compress']) { // fast $info['audio']['encoder_options'] = '-1'; } else { switch ($info['lpac']['max_prediction_order']) { case 20: // simple $info['audio']['encoder_options'] = '-2'; break; case 30: // medium $info['audio']['encoder_options'] = '-3'; break; case 40: // high $info['audio']['encoder_options'] = '-4'; break; case 60: // extrahigh $info['audio']['encoder_options'] = '-5'; break; } } $info['playtime_seconds'] = $info['lpac']['total_samples'] / $info['audio']['sample_rate']; $info['audio']['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds']; return true; }
/** * * @return boolean */ public function Analyze() { $info =& $this->getid3->info; $offset = 0; fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET); $rawdata = fread($this->getid3->fp, $this->getid3->fread_buffer_size()); switch (substr($rawdata, $offset, 4)) { case 'LA02': case 'LA03': case 'LA04': $info['fileformat'] = 'la'; $info['audio']['dataformat'] = 'la'; $info['audio']['lossless'] = true; $info['la']['version_major'] = (int) substr($rawdata, $offset + 2, 1); $info['la']['version_minor'] = (int) substr($rawdata, $offset + 3, 1); $info['la']['version'] = (double) $info['la']['version_major'] + $info['la']['version_minor'] / 10; $offset += 4; $info['la']['uncompressed_size'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; if ($info['la']['uncompressed_size'] == 0) { $info['error'][] = 'Corrupt LA file: uncompressed_size == zero'; return false; } $WAVEchunk = substr($rawdata, $offset, 4); if ($WAVEchunk !== 'WAVE') { $info['error'][] = 'Expected "WAVE" (' . GetId3_Lib_Helper::PrintHexBytes('WAVE') . ') at offset ' . $offset . ', found "' . $WAVEchunk . '" (' . GetId3_Lib_Helper::PrintHexBytes($WAVEchunk) . ') instead.'; return false; } $offset += 4; $info['la']['fmt_size'] = 24; if ($info['la']['version'] >= 0.3) { $info['la']['fmt_size'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $info['la']['header_size'] = 49 + $info['la']['fmt_size'] - 24; $offset += 4; } else { // version 0.2 didn't support additional data blocks $info['la']['header_size'] = 41; } $fmt_chunk = substr($rawdata, $offset, 4); if ($fmt_chunk !== 'fmt ') { $info['error'][] = 'Expected "fmt " (' . GetId3_Lib_Helper::PrintHexBytes('fmt ') . ') at offset ' . $offset . ', found "' . $fmt_chunk . '" (' . GetId3_Lib_Helper::PrintHexBytes($fmt_chunk) . ') instead.'; return false; } $offset += 4; $fmt_size = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; $info['la']['raw']['format'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 2)); $offset += 2; $info['la']['channels'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 2)); $offset += 2; if ($info['la']['channels'] == 0) { $info['error'][] = 'Corrupt LA file: channels == zero'; return false; } $info['la']['sample_rate'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; if ($info['la']['sample_rate'] == 0) { $info['error'][] = 'Corrupt LA file: sample_rate == zero'; return false; } $info['la']['bytes_per_second'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; $info['la']['bytes_per_sample'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 2)); $offset += 2; $info['la']['bits_per_sample'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 2)); $offset += 2; $info['la']['samples'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; $info['la']['raw']['flags'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 1)); $offset += 1; $info['la']['flags']['seekable'] = (bool) ($info['la']['raw']['flags'] & 0x1); if ($info['la']['version'] >= 0.4) { $info['la']['flags']['high_compression'] = (bool) ($info['la']['raw']['flags'] & 0x2); } $info['la']['original_crc'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; // mikeØbevin*de // Basically, the blocksize/seekevery are 61440/19 in La0.4 and 73728/16 // in earlier versions. A seekpoint is added every blocksize * seekevery // samples, so 4 * int(totalSamples / (blockSize * seekEvery)) should // give the number of bytes used for the seekpoints. Of course, if seeking // is disabled, there are no seekpoints stored. if ($info['la']['version'] >= 0.4) { $info['la']['blocksize'] = 61440; $info['la']['seekevery'] = 19; } else { $info['la']['blocksize'] = 73728; $info['la']['seekevery'] = 16; } $info['la']['seekpoint_count'] = 0; if ($info['la']['flags']['seekable']) { $info['la']['seekpoint_count'] = floor($info['la']['samples'] / ($info['la']['blocksize'] * $info['la']['seekevery'])); for ($i = 0; $i < $info['la']['seekpoint_count']; $i++) { $info['la']['seekpoints'][] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; } } if ($info['la']['version'] >= 0.3) { // Following the main header information, the program outputs all of the // seekpoints. Following these is what I called the 'footer start', // i.e. the position immediately after the La audio data is finished. $info['la']['footerstart'] = GetId3_Lib_Helper::LittleEndian2Int(substr($rawdata, $offset, 4)); $offset += 4; if ($info['la']['footerstart'] > $info['filesize']) { $info['warning'][] = 'FooterStart value points to offset ' . $info['la']['footerstart'] . ' which is beyond end-of-file (' . $info['filesize'] . ')'; $info['la']['footerstart'] = $info['filesize']; } } else { // La v0.2 didn't have FooterStart value $info['la']['footerstart'] = $info['avdataend']; } if ($info['la']['footerstart'] < $info['avdataend']) { if ($RIFFtempfilename = tempnam(GetId3_GetId3::getTempDir(), 'id3')) { if ($RIFF_fp = fopen($RIFFtempfilename, 'w+b')) { $RIFFdata = 'WAVE'; if ($info['la']['version'] == 0.2) { $RIFFdata .= substr($rawdata, 12, 24); } else { $RIFFdata .= substr($rawdata, 16, 24); } if ($info['la']['footerstart'] < $info['avdataend']) { fseek($this->getid3->fp, $info['la']['footerstart'], SEEK_SET); $RIFFdata .= fread($this->getid3->fp, $info['avdataend'] - $info['la']['footerstart']); } $RIFFdata = 'RIFF' . GetId3_Lib_Helper::LittleEndian2String(strlen($RIFFdata), 4, false) . $RIFFdata; fwrite($RIFF_fp, $RIFFdata, strlen($RIFFdata)); fclose($RIFF_fp); $getid3_temp = new GetId3_GetId3(); $getid3_temp->openfile($RIFFtempfilename); $getid3_riff = new GetId3_Module_AudioVideo_Riff($getid3_temp); $getid3_riff->Analyze(); if (empty($getid3_temp->info['error'])) { $info['riff'] = $getid3_temp->info['riff']; } else { $info['warning'][] = 'Error parsing RIFF portion of La file: ' . implode($getid3_temp->info['error']); } unset($getid3_temp, $getid3_riff); } unlink($RIFFtempfilename); } } // $info['avdataoffset'] should be zero to begin with, but just in case it's not, include the addition anyway $info['avdataend'] = $info['avdataoffset'] + $info['la']['footerstart']; $info['avdataoffset'] = $info['avdataoffset'] + $offset; //$info['la']['codec'] = RIFFwFormatTagLookup($info['la']['raw']['format']); $info['la']['compression_ratio'] = (double) (($info['avdataend'] - $info['avdataoffset']) / $info['la']['uncompressed_size']); $info['playtime_seconds'] = (double) ($info['la']['samples'] / $info['la']['sample_rate']) / $info['la']['channels']; if ($info['playtime_seconds'] == 0) { $info['error'][] = 'Corrupt LA file: playtime_seconds == zero'; return false; } $info['audio']['bitrate'] = ($info['avdataend'] - $info['avdataoffset']) * 8 / $info['playtime_seconds']; //$info['audio']['codec'] = $info['la']['codec']; $info['audio']['bits_per_sample'] = $info['la']['bits_per_sample']; break; default: if (substr($rawdata, $offset, 2) == 'LA') { $info['error'][] = 'This version of GetId3() [' . $this->getid3->version() . '] does not support LA version ' . substr($rawdata, $offset + 2, 1) . '.' . substr($rawdata, $offset + 3, 1) . ' which this appears to be - check http://getid3.sourceforge.net for updates.'; } else { $info['error'][] = 'Not a LA (Lossless-Audio) file'; } return false; break; } $info['audio']['channels'] = $info['la']['channels']; $info['audio']['sample_rate'] = (int) $info['la']['sample_rate']; $info['audio']['encoder'] = 'LA v' . $info['la']['version']; return true; }