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<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org> //
// available at http://getid3.sourceforge.net //
// or http://www.getid3.org //
/////////////////////////////////////////////////////////////////
// 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
{
function getid3_optimfrog(&$fd, &$ThisFileInfo) {
$ThisFileInfo['fileformat'] = 'ofr';
$ThisFileInfo['audio']['dataformat'] = 'ofr';
$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
$ThisFileInfo['audio']['lossless'] = true;
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$OFRheader = fread($fd, 8);
if (substr($OFRheader, 0, 5) == '*RIFF') {
return $this->ParseOptimFROGheader42($fd, $ThisFileInfo);
} elseif (substr($OFRheader, 0, 3) == 'OFR') {
return $this->ParseOptimFROGheader45($fd, $ThisFileInfo);
}
$ThisFileInfo['error'][] = 'Expecting "*RIFF" or "OFR " at offset '.$ThisFileInfo['avdataoffset'].', found "'.$OFRheader.'"';
unset($ThisFileInfo['fileformat']);
return false;
}
function ParseOptimFROGheader42(&$fd, &$ThisFileInfo) {
// for fileformat of v4.21 and older
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$OptimFROGheaderData = fread($fd, 45);
$ThisFileInfo['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) {
$ThisFileInfo['avdataend'] -= ($OrignalRIFFheaderSize - $OrignalRIFFdataSize);
fseek($fd, $ThisFileInfo['avdataend'], SEEK_SET);
$RIFFdata .= fread($fd, $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_riff::ParseRIFFdata($RIFFdata, $ThisFileInfo);
$ThisFileInfo['audio']['encoder'] = 'OptimFROG '.$OptimFROGencoderVersion_major.'.'.$OptimFROGencoderVersion_minor;
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['riff']['audio'][0]['channels'];
$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['riff']['audio'][0]['sample_rate'];
$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['riff']['audio'][0]['bits_per_sample'];
$ThisFileInfo['playtime_seconds'] = $OrignalRIFFdataSize / ($ThisFileInfo['audio']['channels'] * $ThisFileInfo['audio']['sample_rate'] * ($ThisFileInfo['audio']['bits_per_sample'] / 8));
$ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
return true;
}
function ParseOptimFROGheader45(&$fd, &$ThisFileInfo) {
// for fileformat of v4.50a and higher
$RIFFdata = '';
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
while (!feof($fd) && (ftell($fd) < $ThisFileInfo['avdataend'])) {
$BlockOffset = ftell($fd);
$BlockData = fread($fd, 8);
$offset = 8;
$BlockName = substr($BlockData, 0, 4);
$BlockSize = getid3_lib::LittleEndian2Int(substr($BlockData, 4, 4));
if ($BlockName == 'OFRX') {
$BlockName = 'OFR ';
}
if (!isset($ThisFileInfo['ofr'][$BlockName])) {
$ThisFileInfo['ofr'][$BlockName] = array();
}
$thisfile_ofr_thisblock = &$ThisFileInfo['ofr'][$BlockName];
switch ($BlockName) {
case 'OFR ':
// shortcut
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
$ThisFileInfo['audio']['encoder'] = 'OptimFROG 4.50 alpha';
switch ($BlockSize) {
case 12:
case 15:
// good
break;
default:
$ThisFileInfo['warning'][] = '"'.$BlockName.'" contains more data than expected (expected 12 or 15 bytes, found '.$BlockSize.' bytes)';
break;
}
$BlockData .= fread($fd, $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;
$ThisFileInfo['audio']['encoder'] = 'OptimFROG '.$thisfile_ofr_thisblock['encoder'];
$ThisFileInfo['audio']['encoder_options'] = '--mode '.$thisfile_ofr_thisblock['compression'];
if ((($thisfile_ofr_thisblock['raw']['encoder_id'] & 0xF0) >> 4) == 7) { // v4.507
if (strtolower(getid3_lib::fileextension($ThisFileInfo['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.
$ThisFileInfo['audio']['dataformat'] = 'ofs';
$ThisFileInfo['audio']['lossless'] = true;
}
}
}
$ThisFileInfo['audio']['channels'] = $thisfile_ofr_thisblock['channels'];
$ThisFileInfo['audio']['sample_rate'] = $thisfile_ofr_thisblock['sample_rate'];
$ThisFileInfo['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'] = $BlockSize;
if ($ThisFileInfo['avdataoffset'] == 0) {
$ThisFileInfo['avdataoffset'] = $BlockOffset;
}
// Only interested in first 14 bytes (only first 12 needed for v4.50 alpha), not actual audio data
$BlockData .= fread($fd, 14);
fseek($fd, $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']);
$offset += 2;
if ($ThisFileInfo['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;
$RIFFdata .= fread($fd, $BlockSize);
break;
case 'TAIL':
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
if ($BlockSize > 0) {
$RIFFdata .= fread($fd, $BlockSize);
}
break;
case 'RECV':
// block contains no useful meta data - simply note and skip
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
fseek($fd, $BlockSize, SEEK_CUR);
break;
case 'APET':
// APEtag v2
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
$ThisFileInfo['warning'][] = 'APEtag processing inside OptimFROG not supported in this version ('.GETID3_VERSION.') of getID3()';
fseek($fd, $BlockSize, SEEK_CUR);
break;
case 'MD5 ':
// APEtag v2
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
if ($BlockSize == 16) {
$thisfile_ofr_thisblock['md5_binary'] = fread($fd, $BlockSize);
$thisfile_ofr_thisblock['md5_string'] = getid3_lib::PrintHexBytes($thisfile_ofr_thisblock['md5_binary'], true, false, false);
$ThisFileInfo['md5_data_source'] = $thisfile_ofr_thisblock['md5_string'];
} else {
$ThisFileInfo['warning'][] = 'Expecting block size of 16 in "MD5 " chunk, found '.$BlockSize.' instead';
fseek($fd, $BlockSize, SEEK_CUR);
}
break;
default:
$thisfile_ofr_thisblock['offset'] = $BlockOffset;
$thisfile_ofr_thisblock['size'] = $BlockSize;
$ThisFileInfo['warning'][] = 'Unhandled OptimFROG block type "'.$BlockName.'" at offset '.$thisfile_ofr_thisblock['offset'];
fseek($fd, $BlockSize, SEEK_CUR);
break;
}
}
if (isset($ThisFileInfo['ofr']['TAIL']['offset'])) {
$ThisFileInfo['avdataend'] = $ThisFileInfo['ofr']['TAIL']['offset'];
}
$ThisFileInfo['playtime_seconds'] = (float) $ThisFileInfo['ofr']['OFR ']['total_samples'] / ($ThisFileInfo['audio']['channels'] * $ThisFileInfo['audio']['sample_rate']);
$ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['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_riff::ParseRIFFdata($RIFFdata, $ThisFileInfo);
return true;
}
function OptimFROGsampleTypeLookup($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);
}
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);
}
function OptimFROGchannelConfigurationLookup($ChannelConfiguration) {
static $OptimFROGchannelConfigurationLookup = array(
0 => 'mono',
1 => 'stereo'
);
return (isset($OptimFROGchannelConfigurationLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigurationLookup[$ChannelConfiguration] : false);
}
function OptimFROGchannelConfigNumChannelsLookup($ChannelConfiguration) {
static $OptimFROGchannelConfigNumChannelsLookup = array(
0 => 1,
1 => 2
);
return (isset($OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration]) ? $OptimFROGchannelConfigNumChannelsLookup[$ChannelConfiguration] : false);
}
// function OptimFROGalgorithmNameLookup($AlgorithID) {
// static $OptimFROGalgorithmNameLookup = array();
// return (isset($OptimFROGalgorithmNameLookup[$AlgorithID]) ? $OptimFROGalgorithmNameLookup[$AlgorithID] : false);
// }
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($EncoderSystemID).')').')';
}
function OptimFROGcompressionLookup($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($CompressionModeID), 2, '0', STR_PAD_LEFT).')');
}
function OptimFROGspeedupLookup($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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