429 lines
16 KiB
PHP
429 lines
16 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio.optimfrog.php //
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// module for analyzing OptimFROG audio files //
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// dependencies: module.audio.riff.php //
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// ///
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/////////////////////////////////////////////////////////////////
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
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class getid3_optimfrog extends getid3_handler
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{
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function Analyze() {
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$info = &$this->getid3->info;
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$info['fileformat'] = 'ofr';
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$info['audio']['dataformat'] = 'ofr';
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$info['audio']['bitrate_mode'] = 'vbr';
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$info['audio']['lossless'] = true;
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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$OFRheader = fread($this->getid3->fp, 8);
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if (substr($OFRheader, 0, 5) == '*RIFF') {
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return $this->ParseOptimFROGheader42();
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} elseif (substr($OFRheader, 0, 3) == 'OFR') {
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return $this->ParseOptimFROGheader45();
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}
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$info['error'][] = 'Expecting "*RIFF" or "OFR " at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($OFRheader).'"';
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unset($info['fileformat']);
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return false;
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}
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function ParseOptimFROGheader42() {
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// for fileformat of v4.21 and older
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$info = &$this->getid3->info;
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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$OptimFROGheaderData = fread($this->getid3->fp, 45);
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$info['avdataoffset'] = 45;
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$OptimFROGencoderVersion_raw = getid3_lib::LittleEndian2Int(substr($OptimFROGheaderData, 0, 1));
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$OptimFROGencoderVersion_major = floor($OptimFROGencoderVersion_raw / 10);
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$OptimFROGencoderVersion_minor = $OptimFROGencoderVersion_raw - ($OptimFROGencoderVersion_major * 10);
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$RIFFdata = substr($OptimFROGheaderData, 1, 44);
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$OrignalRIFFheaderSize = getid3_lib::LittleEndian2Int(substr($RIFFdata, 4, 4)) + 8;
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$OrignalRIFFdataSize = getid3_lib::LittleEndian2Int(substr($RIFFdata, 40, 4)) + 44;
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if ($OrignalRIFFheaderSize > $OrignalRIFFdataSize) {
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$info['avdataend'] -= ($OrignalRIFFheaderSize - $OrignalRIFFdataSize);
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fseek($this->getid3->fp, $info['avdataend'], SEEK_SET);
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$RIFFdata .= fread($this->getid3->fp, $OrignalRIFFheaderSize - $OrignalRIFFdataSize);
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}
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// move the data chunk after all other chunks (if any)
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// so that the RIFF parser doesn't see EOF when trying
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// to skip over the data chunk
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$RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8);
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$getid3_temp = new getID3();
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$getid3_temp->openfile($this->getid3->filename);
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$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
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$getid3_temp->info['avdataend'] = $info['avdataend'];
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$getid3_riff = new getid3_riff($getid3_temp);
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$getid3_riff->ParseRIFFdata($RIFFdata);
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$info['riff'] = $getid3_temp->info['riff'];
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$info['audio']['encoder'] = 'OptimFROG '.$OptimFROGencoderVersion_major.'.'.$OptimFROGencoderVersion_minor;
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$info['audio']['channels'] = $info['riff']['audio'][0]['channels'];
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$info['audio']['sample_rate'] = $info['riff']['audio'][0]['sample_rate'];
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$info['audio']['bits_per_sample'] = $info['riff']['audio'][0]['bits_per_sample'];
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$info['playtime_seconds'] = $OrignalRIFFdataSize / ($info['audio']['channels'] * $info['audio']['sample_rate'] * ($info['audio']['bits_per_sample'] / 8));
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$info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
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unset($getid3_riff, $getid3_temp, $RIFFdata);
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return true;
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}
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function ParseOptimFROGheader45() {
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// for fileformat of v4.50a and higher
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$info = &$this->getid3->info;
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$RIFFdata = '';
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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while (!feof($this->getid3->fp) && (ftell($this->getid3->fp) < $info['avdataend'])) {
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$BlockOffset = ftell($this->getid3->fp);
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$BlockData = fread($this->getid3->fp, 8);
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$offset = 8;
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$BlockName = substr($BlockData, 0, 4);
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$BlockSize = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 4));
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if ($BlockName == 'OFRX') {
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$BlockName = 'OFR ';
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}
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if (!isset($info['ofr'][$BlockName])) {
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$info['ofr'][$BlockName] = array();
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}
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$thisfile_ofr_thisblock = &$info['ofr'][$BlockName];
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switch ($BlockName) {
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case 'OFR ':
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// shortcut
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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$info['audio']['encoder'] = 'OptimFROG 4.50 alpha';
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switch ($BlockSize) {
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case 12:
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case 15:
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// good
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break;
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default:
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$info['warning'][] = '"'.$BlockName.'" contains more data than expected (expected 12 or 15 bytes, found '.$BlockSize.' bytes)';
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break;
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}
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$BlockData .= fread($this->getid3->fp, $BlockSize);
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$thisfile_ofr_thisblock['total_samples'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 6));
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$offset += 6;
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$thisfile_ofr_thisblock['raw']['sample_type'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1));
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$thisfile_ofr_thisblock['sample_type'] = $this->OptimFROGsampleTypeLookup($thisfile_ofr_thisblock['raw']['sample_type']);
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$offset += 1;
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$thisfile_ofr_thisblock['channel_config'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1));
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$thisfile_ofr_thisblock['channels'] = $thisfile_ofr_thisblock['channel_config'];
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$offset += 1;
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$thisfile_ofr_thisblock['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4));
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$offset += 4;
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if ($BlockSize > 12) {
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// OFR 4.504b or higher
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$thisfile_ofr_thisblock['channels'] = $this->OptimFROGchannelConfigNumChannelsLookup($thisfile_ofr_thisblock['channel_config']);
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$thisfile_ofr_thisblock['raw']['encoder_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2));
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$thisfile_ofr_thisblock['encoder'] = $this->OptimFROGencoderNameLookup($thisfile_ofr_thisblock['raw']['encoder_id']);
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$offset += 2;
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$thisfile_ofr_thisblock['raw']['compression'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1));
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$thisfile_ofr_thisblock['compression'] = $this->OptimFROGcompressionLookup($thisfile_ofr_thisblock['raw']['compression']);
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$thisfile_ofr_thisblock['speedup'] = $this->OptimFROGspeedupLookup($thisfile_ofr_thisblock['raw']['compression']);
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$offset += 1;
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$info['audio']['encoder'] = 'OptimFROG '.$thisfile_ofr_thisblock['encoder'];
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$info['audio']['encoder_options'] = '--mode '.$thisfile_ofr_thisblock['compression'];
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if ((($thisfile_ofr_thisblock['raw']['encoder_id'] & 0xF0) >> 4) == 7) { // v4.507
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if (strtolower(getid3_lib::fileextension($info['filename'])) == 'ofs') {
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// OptimFROG DualStream format is lossy, but as of v4.507 there is no way to tell the difference
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// between lossless and lossy other than the file extension.
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$info['audio']['dataformat'] = 'ofs';
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$info['audio']['lossless'] = true;
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}
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}
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}
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$info['audio']['channels'] = $thisfile_ofr_thisblock['channels'];
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$info['audio']['sample_rate'] = $thisfile_ofr_thisblock['sample_rate'];
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$info['audio']['bits_per_sample'] = $this->OptimFROGbitsPerSampleTypeLookup($thisfile_ofr_thisblock['raw']['sample_type']);
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break;
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case 'COMP':
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// unlike other block types, there CAN be multiple COMP blocks
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$COMPdata['offset'] = $BlockOffset;
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$COMPdata['size'] = $BlockSize;
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if ($info['avdataoffset'] == 0) {
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$info['avdataoffset'] = $BlockOffset;
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}
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// Only interested in first 14 bytes (only first 12 needed for v4.50 alpha), not actual audio data
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$BlockData .= fread($this->getid3->fp, 14);
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fseek($this->getid3->fp, $BlockSize - 14, SEEK_CUR);
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$COMPdata['crc_32'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4));
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$offset += 4;
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$COMPdata['sample_count'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 4));
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$offset += 4;
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$COMPdata['raw']['sample_type'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1));
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$COMPdata['sample_type'] = $this->OptimFROGsampleTypeLookup($COMPdata['raw']['sample_type']);
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$offset += 1;
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$COMPdata['raw']['channel_configuration'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 1));
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$COMPdata['channel_configuration'] = $this->OptimFROGchannelConfigurationLookup($COMPdata['raw']['channel_configuration']);
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$offset += 1;
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$COMPdata['raw']['algorithm_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2));
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//$COMPdata['algorithm'] = OptimFROGalgorithmNameLookup($COMPdata['raw']['algorithm_id']);
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$offset += 2;
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if ($info['ofr']['OFR ']['size'] > 12) {
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// OFR 4.504b or higher
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$COMPdata['raw']['encoder_id'] = getid3_lib::LittleEndian2Int(substr($BlockData, $offset, 2));
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$COMPdata['encoder'] = $this->OptimFROGencoderNameLookup($COMPdata['raw']['encoder_id']);
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$offset += 2;
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}
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if ($COMPdata['crc_32'] == 0x454E4F4E) {
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// ASCII value of 'NONE' - placeholder value in v4.50a
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$COMPdata['crc_32'] = false;
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}
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$thisfile_ofr_thisblock[] = $COMPdata;
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break;
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case 'HEAD':
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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$RIFFdata .= fread($this->getid3->fp, $BlockSize);
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break;
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case 'TAIL':
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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if ($BlockSize > 0) {
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$RIFFdata .= fread($this->getid3->fp, $BlockSize);
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}
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break;
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case 'RECV':
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// block contains no useful meta data - simply note and skip
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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fseek($this->getid3->fp, $BlockSize, SEEK_CUR);
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break;
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case 'APET':
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// APEtag v2
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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$info['warning'][] = 'APEtag processing inside OptimFROG not supported in this version ('.$this->getid3->version().') of getID3()';
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fseek($this->getid3->fp, $BlockSize, SEEK_CUR);
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break;
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case 'MD5 ':
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// APEtag v2
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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if ($BlockSize == 16) {
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$thisfile_ofr_thisblock['md5_binary'] = fread($this->getid3->fp, $BlockSize);
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$thisfile_ofr_thisblock['md5_string'] = getid3_lib::PrintHexBytes($thisfile_ofr_thisblock['md5_binary'], true, false, false);
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$info['md5_data_source'] = $thisfile_ofr_thisblock['md5_string'];
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} else {
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$info['warning'][] = 'Expecting block size of 16 in "MD5 " chunk, found '.$BlockSize.' instead';
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fseek($this->getid3->fp, $BlockSize, SEEK_CUR);
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}
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break;
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default:
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$thisfile_ofr_thisblock['offset'] = $BlockOffset;
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$thisfile_ofr_thisblock['size'] = $BlockSize;
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$info['warning'][] = 'Unhandled OptimFROG block type "'.$BlockName.'" at offset '.$thisfile_ofr_thisblock['offset'];
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fseek($this->getid3->fp, $BlockSize, SEEK_CUR);
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break;
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}
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}
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if (isset($info['ofr']['TAIL']['offset'])) {
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$info['avdataend'] = $info['ofr']['TAIL']['offset'];
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}
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$info['playtime_seconds'] = (float) $info['ofr']['OFR ']['total_samples'] / ($info['audio']['channels'] * $info['audio']['sample_rate']);
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$info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
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// move the data chunk after all other chunks (if any)
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// so that the RIFF parser doesn't see EOF when trying
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// to skip over the data chunk
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$RIFFdata = substr($RIFFdata, 0, 36).substr($RIFFdata, 44).substr($RIFFdata, 36, 8);
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$getid3_temp = new getID3();
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$getid3_temp->openfile($this->getid3->filename);
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$getid3_temp->info['avdataoffset'] = $info['avdataoffset'];
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$getid3_temp->info['avdataend'] = $info['avdataend'];
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$getid3_riff = new getid3_riff($getid3_temp);
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$getid3_riff->ParseRIFFdata($RIFFdata);
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$info['riff'] = $getid3_temp->info['riff'];
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unset($getid3_riff, $getid3_temp, $RIFFdata);
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return true;
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}
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static function OptimFROGsampleTypeLookup($SampleType) {
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static $OptimFROGsampleTypeLookup = array(
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0 => 'unsigned int (8-bit)',
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1 => 'signed int (8-bit)',
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2 => 'unsigned int (16-bit)',
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3 => 'signed int (16-bit)',
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4 => 'unsigned int (24-bit)',
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5 => 'signed int (24-bit)',
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6 => 'unsigned int (32-bit)',
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7 => 'signed int (32-bit)',
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8 => 'float 0.24 (32-bit)',
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9 => 'float 16.8 (32-bit)',
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10 => 'float 24.0 (32-bit)'
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);
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return (isset($OptimFROGsampleTypeLookup[$SampleType]) ? $OptimFROGsampleTypeLookup[$SampleType] : false);
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}
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static function OptimFROGbitsPerSampleTypeLookup($SampleType) {
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static $OptimFROGbitsPerSampleTypeLookup = array(
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0 => 8,
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1 => 8,
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2 => 16,
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3 => 16,
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4 => 24,
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5 => 24,
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6 => 32,
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7 => 32,
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8 => 32,
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9 => 32,
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10 => 32
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);
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return (isset($OptimFROGbitsPerSampleTypeLookup[$SampleType]) ? $OptimFROGbitsPerSampleTypeLookup[$SampleType] : false);
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}
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static function OptimFROGchannelConfigurationLookup($ChannelConfiguration) {
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static $OptimFROGchannelConfigurationLookup = array(
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0 => 'mono',
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1 => 'stereo'
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);
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return (isset($OptimFROGchannelConfigurationLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigurationLookup[$ChannelConfiguration] : false);
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}
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static function OptimFROGchannelConfigNumChannelsLookup($ChannelConfiguration) {
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static $OptimFROGchannelConfigNumChannelsLookup = array(
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0 => 1,
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1 => 2
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);
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return (isset($OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration] : false);
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}
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// static function OptimFROGalgorithmNameLookup($AlgorithID) {
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// static $OptimFROGalgorithmNameLookup = array();
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// return (isset($OptimFROGalgorithmNameLookup[$AlgorithID]) ? $OptimFROGalgorithmNameLookup[$AlgorithID] : false);
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// }
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static function OptimFROGencoderNameLookup($EncoderID) {
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// version = (encoderID >> 4) + 4500
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// system = encoderID & 0xF
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$EncoderVersion = number_format(((($EncoderID & 0xF0) >> 4) + 4500) / 1000, 3);
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$EncoderSystemID = ($EncoderID & 0x0F);
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static $OptimFROGencoderSystemLookup = array(
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0x00 => 'Windows console',
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0x01 => 'Linux console',
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0x0F => 'unknown'
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);
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return $EncoderVersion.' ('.(isset($OptimFROGencoderSystemLookup[$EncoderSystemID]) ? $OptimFROGencoderSystemLookup[$EncoderSystemID] : 'undefined encoder type (0x'.dechex($EncoderSystemID).')').')';
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}
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static function OptimFROGcompressionLookup($CompressionID) {
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// mode = compression >> 3
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// speedup = compression & 0x07
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$CompressionModeID = ($CompressionID & 0xF8) >> 3;
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//$CompressionSpeedupID = ($CompressionID & 0x07);
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static $OptimFROGencoderModeLookup = array(
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0x00 => 'fast',
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0x01 => 'normal',
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0x02 => 'high',
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0x03 => 'extra', // extranew (some versions)
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0x04 => 'best', // bestnew (some versions)
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0x05 => 'ultra',
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0x06 => 'insane',
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0x07 => 'highnew',
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0x08 => 'extranew',
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0x09 => 'bestnew'
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);
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return (isset($OptimFROGencoderModeLookup[$CompressionModeID]) ? $OptimFROGencoderModeLookup[$CompressionModeID] : 'undefined mode (0x'.str_pad(dechex($CompressionModeID), 2, '0', STR_PAD_LEFT).')');
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}
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static function OptimFROGspeedupLookup($CompressionID) {
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// mode = compression >> 3
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// speedup = compression & 0x07
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//$CompressionModeID = ($CompressionID & 0xF8) >> 3;
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$CompressionSpeedupID = ($CompressionID & 0x07);
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static $OptimFROGencoderSpeedupLookup = array(
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0x00 => '1x',
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0x01 => '2x',
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0x02 => '4x'
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);
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return (isset($OptimFROGencoderSpeedupLookup[$CompressionSpeedupID]) ? $OptimFROGencoderSpeedupLookup[$CompressionSpeedupID] : 'undefined mode (0x'.dechex($CompressionSpeedupID));
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}
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}
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?>
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