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