function RIFFparseWAVEFORMATex($WaveFormatExData)
{
$WaveFormatEx['raw']['wFormatTag'] = LittleEndian2Int(substr($WaveFormatExData, 0, 2));
$WaveFormatEx['raw']['nChannels'] = LittleEndian2Int(substr($WaveFormatExData, 2, 2));
$WaveFormatEx['raw']['nSamplesPerSec'] = LittleEndian2Int(substr($WaveFormatExData, 4, 4));
$WaveFormatEx['raw']['nAvgBytesPerSec'] = LittleEndian2Int(substr($WaveFormatExData, 8, 4));
$WaveFormatEx['raw']['nBlockAlign'] = LittleEndian2Int(substr($WaveFormatExData, 12, 2));
$WaveFormatEx['raw']['nBitsPerSample'] = LittleEndian2Int(substr($WaveFormatExData, 14, 2));
$WaveFormatEx['codec'] = RIFFwFormatTagLookup($WaveFormatEx['raw']['wFormatTag']);
$WaveFormatEx['channels'] = $WaveFormatEx['raw']['nChannels'];
$WaveFormatEx['sample_rate'] = $WaveFormatEx['raw']['nSamplesPerSec'];
$WaveFormatEx['bitrate'] = $WaveFormatEx['raw']['nAvgBytesPerSec'] * 8;
$WaveFormatEx['bits_per_sample'] = $WaveFormatEx['raw']['nBitsPerSample'];
return $WaveFormatEx;
}
function getLAHeaderFilepointer(&$fd, &$ThisFileInfo)
{
$offset = 0;
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$rawdata = fread($fd, FREAD_BUFFER_SIZE);
switch (substr($rawdata, $offset, 4)) {
case 'LA02':
case 'LA03':
$ThisFileInfo['fileformat'] = 'la';
$ThisFileInfo['audio']['dataformat'] = 'la';
$ThisFileInfo['la']['version_major'] = (int) substr($rawdata, $offset + 2, 1);
$ThisFileInfo['la']['version_minor'] = (int) substr($rawdata, $offset + 3, 1);
$ThisFileInfo['la']['version'] = (double) $ThisFileInfo['la']['version_major'] + $ThisFileInfo['la']['version_minor'] / 10;
$offset += 4;
$ThisFileInfo['la']['uncompressed_size'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
if ($ThisFileInfo['la']['uncompressed_size'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt LA file: uncompressed_size == zero';
return false;
}
$WAVEchunk = substr($rawdata, $offset, 4);
if ($WAVEchunk !== 'WAVE') {
$ThisFileInfo['error'] .= "\n" . 'Expected "WAVE" (' . PrintHexBytes('WAVE') . ') at offset ' . $offset . ', found "' . $WAVEchunk . '" (' . PrintHexBytes($WAVEchunk) . ') instead.';
return false;
}
$offset += 4;
$ThisFileInfo['la']['format_size'] = 24;
if ($ThisFileInfo['la']['version'] > 0.2) {
$ThisFileInfo['la']['format_size'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$ThisFileInfo['la']['header_size'] = 49 + $ThisFileInfo['la']['format_size'] - 24;
$offset += 4;
} else {
// version two didn't support additional data blocks
$ThisFileInfo['la']['header_size'] = 41;
}
$fmt_chunk = substr($rawdata, $offset, 4);
if ($fmt_chunk !== 'fmt ') {
$ThisFileInfo['error'] .= "\n" . 'Expected "fmt " (' . PrintHexBytes('fmt ') . ') at offset ' . $offset . ', found "' . $fmt_chunk . '" (' . PrintHexBytes($fmt_chunk) . ') instead.';
return false;
}
$offset += 4;
$fmt_size = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
$ThisFileInfo['la']['format_raw'] = LittleEndian2Int(substr($rawdata, $offset, 2));
$offset += 2;
$ThisFileInfo['la']['channels'] = LittleEndian2Int(substr($rawdata, $offset, 2));
$offset += 2;
if ($ThisFileInfo['la']['channels'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt LA file: channels == zero';
return false;
}
$ThisFileInfo['la']['sample_rate'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
if ($ThisFileInfo['la']['sample_rate'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt LA file: sample_rate == zero';
return false;
}
$ThisFileInfo['la']['bytes_per_second'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
$ThisFileInfo['la']['bytes_per_sample'] = LittleEndian2Int(substr($rawdata, $offset, 2));
$offset += 2;
$ThisFileInfo['la']['bits_per_sample'] = LittleEndian2Int(substr($rawdata, $offset, 2));
$offset += 2;
$ThisFileInfo['la']['samples'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
$ThisFileInfo['la']['seekable'] = (bool) LittleEndian2Int(substr($rawdata, $offset, 1));
$offset += 1;
$ThisFileInfo['la']['original_crc'] = LittleEndian2Int(substr($rawdata, $offset, 4));
$offset += 4;
require_once GETID3_INCLUDEPATH . 'getid3.riff.php';
$ThisFileInfo['la']['codec'] = RIFFwFormatTagLookup($ThisFileInfo['la']['format_raw']);
$ThisFileInfo['la']['compression_ratio'] = (double) (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['la']['uncompressed_size']);
$ThisFileInfo['playtime_seconds'] = (double) ($ThisFileInfo['la']['samples'] / $ThisFileInfo['la']['sample_rate']) / $ThisFileInfo['la']['channels'];
if ($ThisFileInfo['playtime_seconds'] == 0) {
$ThisFileInfo['error'] .= "\n" . 'Corrupt LA file: playtime_seconds == zero';
return false;
}
// add size of file header to avdataoffset - calc bitrate correctly + MD5 data
$ThisFileInfo['avdataoffset'] += $ThisFileInfo['la']['header_size'];
$ThisFileInfo['audio']['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['playtime_seconds'];
$ThisFileInfo['audio']['codec'] = $ThisFileInfo['la']['codec'];
$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['la']['bits_per_sample'];
break;
default:
if (substr($rawdata, $offset, 2) == 'LA') {
$ThisFileInfo['error'] .= "\n" . 'This version of getID3() (v' . GETID3VERSION . ') doesn\'t support LA version ' . substr($rawdata, $offset + 2, 1) . '.' . substr($rawdata, $offset + 3, 1) . ' which this appears to be - check http://getid3.sourceforge.net for updates.';
} else {
$ThisFileInfo['error'] .= "\n" . 'Not a LA (Lossless-Audio) file';
}
return false;
break;
}
$ThisFileInfo['audio']['channels'] = $ThisFileInfo['la']['channels'];
$ThisFileInfo['audio']['sample_rate'] = (int) $ThisFileInfo['la']['sample_rate'];
$ThisFileInfo['audio']['encoder'] = (string) $ThisFileInfo['la']['version'];
return true;
}
function getRIFFHeaderFilepointer(&$fd, &$MP3fileInfo)
{
$offset = 0;
rewind($fd);
$MP3fileInfo['RIFF'] = ParseRIFF($fd, $offset, $MP3fileInfo['filesize']);
$streamindex = 0;
if (!is_array($MP3fileInfo['RIFF'])) {
$MP3fileInfo['error'] .= "\n" . 'Cannot parse RIFF (this is maybe not a RIFF / WAV / AVI file?)';
unset($MP3fileInfo['RIFF']);
unset($MP3fileInfo['fileformat']);
return FALSE;
}
$arraykeys = array_keys($MP3fileInfo['RIFF']);
switch ($arraykeys[0]) {
case 'WAVE':
$MP3fileInfo['fileformat'] = 'wav';
if (isset($MP3fileInfo['RIFF']['WAVE']['fmt '][0]['data'])) {
$fmtData = $MP3fileInfo['RIFF']['WAVE']['fmt '][0]['data'];
$MP3fileInfo['RIFF']['raw']['fmt ']['wFormatTag'] = LittleEndian2Int(substr($fmtData, 0, 2));
$MP3fileInfo['RIFF']['raw']['fmt ']['nChannels'] = LittleEndian2Int(substr($fmtData, 2, 2));
$MP3fileInfo['RIFF']['raw']['fmt ']['nSamplesPerSec'] = LittleEndian2Int(substr($fmtData, 4, 4));
$MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec'] = LittleEndian2Int(substr($fmtData, 8, 4));
$MP3fileInfo['RIFF']['raw']['fmt ']['nBlockAlign'] = LittleEndian2Int(substr($fmtData, 12, 2));
$MP3fileInfo['RIFF']['raw']['fmt ']['nBitsPerSample'] = LittleEndian2Int(substr($fmtData, 14, 2));
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['format'] = RIFFwFormatTagLookup($MP3fileInfo['RIFF']['raw']['fmt ']['wFormatTag']);
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channels'] = $MP3fileInfo['RIFF']['raw']['fmt ']['nChannels'];
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channelmode'] = $MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channels'] == 1 ? 'mono' : 'stereo';
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['frequency'] = $MP3fileInfo['RIFF']['raw']['fmt ']['nSamplesPerSec'];
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitrate'] = $MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec'] * 8;
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitspersample'] = $MP3fileInfo['RIFF']['raw']['fmt ']['nBitsPerSample'];
}
if (isset($MP3fileInfo['RIFF']['WAVE']['rgad'][0]['data'])) {
$rgadData = $MP3fileInfo['RIFF']['WAVE']['rgad'][0]['data'];
$MP3fileInfo['RIFF']['raw']['rgad']['fPeakAmplitude'] = LittleEndian2Float(substr($rgadData, 0, 4));
$MP3fileInfo['RIFF']['raw']['rgad']['nRadioRgAdjust'] = LittleEndian2Int(substr($rgadData, 4, 2));
$MP3fileInfo['RIFF']['raw']['rgad']['nAudiophileRgAdjust'] = LittleEndian2Int(substr($rgadData, 6, 2));
$nRadioRgAdjustBitstring = str_pad(Dec2Bin($MP3fileInfo['RIFF']['raw']['rgad']['nRadioRgAdjust']), 16, '0', STR_PAD_LEFT);
$nAudiophileRgAdjustBitstring = str_pad(Dec2Bin($MP3fileInfo['RIFF']['raw']['rgad']['nAudiophileRgAdjust']), 16, '0', STR_PAD_LEFT);
$MP3fileInfo['RIFF']['raw']['rgad']['radio']['name'] = Bin2Dec(substr($nRadioRgAdjustBitstring, 0, 3));
$MP3fileInfo['RIFF']['raw']['rgad']['radio']['originator'] = Bin2Dec(substr($nRadioRgAdjustBitstring, 3, 3));
$MP3fileInfo['RIFF']['raw']['rgad']['radio']['signbit'] = Bin2Dec(substr($nRadioRgAdjustBitstring, 6, 1));
$MP3fileInfo['RIFF']['raw']['rgad']['radio']['adjustment'] = Bin2Dec(substr($nRadioRgAdjustBitstring, 7, 9));
$MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['name'] = Bin2Dec(substr($nAudiophileRgAdjustBitstring, 0, 3));
$MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['originator'] = Bin2Dec(substr($nAudiophileRgAdjustBitstring, 3, 3));
$MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['signbit'] = Bin2Dec(substr($nAudiophileRgAdjustBitstring, 6, 1));
$MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['adjustment'] = Bin2Dec(substr($nAudiophileRgAdjustBitstring, 7, 9));
$MP3fileInfo['RIFF']['rgad']['peakamplitude'] = $MP3fileInfo['RIFF']['raw']['rgad']['fPeakAmplitude'];
if ($MP3fileInfo['RIFF']['raw']['rgad']['radio']['name'] != 0 && $MP3fileInfo['RIFF']['raw']['rgad']['radio']['originator'] != 0) {
$MP3fileInfo['RIFF']['rgad']['radio']['name'] = RGADnameLookup($MP3fileInfo['RIFF']['raw']['rgad']['radio']['name']);
$MP3fileInfo['RIFF']['rgad']['radio']['originator'] = RGADoriginatorLookup($MP3fileInfo['RIFF']['raw']['rgad']['radio']['originator']);
$MP3fileInfo['RIFF']['rgad']['radio']['adjustment'] = RGADadjustmentLookup($MP3fileInfo['RIFF']['raw']['rgad']['radio']['adjustment'], $MP3fileInfo['RIFF']['raw']['rgad']['radio']['signbit']);
}
if ($MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['name'] != 0 && $MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['originator'] != 0) {
$MP3fileInfo['RIFF']['rgad']['audiophile']['name'] = RGADnameLookup($MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['name']);
$MP3fileInfo['RIFF']['rgad']['audiophile']['originator'] = RGADoriginatorLookup($MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['originator']);
$MP3fileInfo['RIFF']['rgad']['audiophile']['adjustment'] = RGADadjustmentLookup($MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['adjustment'], $MP3fileInfo['RIFF']['raw']['rgad']['audiophile']['signbit']);
}
}
if (isset($MP3fileInfo['RIFF']['WAVE']['fact'][0]['data'])) {
$MP3fileInfo['RIFF']['raw']['fact']['NumberOfSamples'] = LittleEndian2Int(substr($MP3fileInfo['RIFF']['WAVE']['fact'][0]['data'], 0, 4));
if (isset($MP3fileInfo['RIFF']['raw']['fmt ']['nSamplesPerSec']) && $MP3fileInfo['RIFF']['raw']['fmt ']['nSamplesPerSec']) {
$MP3fileInfo['playtime_seconds'] = (double) $MP3fileInfo['RIFF']['raw']['fact']['NumberOfSamples'] / $MP3fileInfo['RIFF']['raw']['fmt ']['nSamplesPerSec'];
}
if (isset($MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec']) && $MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec']) {
$MP3fileInfo['audiobytes'] = CastAsInt(round($MP3fileInfo['playtime_seconds'] * $MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec']));
$MP3fileInfo['bitrate'] = CastAsInt($MP3fileInfo['RIFF']['raw']['fmt ']['nAvgBytesPerSec'] * 8);
}
}
if (!isset($MP3fileInfo['audiobytes']) && isset($MP3fileInfo['RIFF']['WAVE']['data'][0]['size'])) {
$MP3fileInfo['audiobytes'] = $MP3fileInfo['RIFF']['WAVE']['data'][0]['size'];
}
if (!isset($MP3fileInfo['bitrate']) && isset($MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitrate']) && isset($MP3fileInfo['audiobytes'])) {
$MP3fileInfo['bitrate'] = $MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitrate'];
$MP3fileInfo['playtime_seconds'] = (double) ($MP3fileInfo['audiobytes'] * 8 / $MP3fileInfo['bitrate']);
}
break;
case 'AVI ':
$MP3fileInfo['fileformat'] = 'avi';
if (isset($MP3fileInfo['RIFF']['AVI ']['hdrl']['avih']["{$streamindex}"]['data'])) {
$avihData = $MP3fileInfo['RIFF']['AVI ']['hdrl']['avih']["{$streamindex}"]['data'];
$MP3fileInfo['RIFF']['raw']['avih']['dwMicroSecPerFrame'] = LittleEndian2Int(substr($avihData, 0, 4));
// frame display rate (or 0L)
$MP3fileInfo['RIFF']['raw']['avih']['dwMaxBytesPerSec'] = LittleEndian2Int(substr($avihData, 4, 4));
// max. transfer rate
$MP3fileInfo['RIFF']['raw']['avih']['dwPaddingGranularity'] = LittleEndian2Int(substr($avihData, 8, 4));
// pad to multiples of this size; normally 2K.
$MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] = LittleEndian2Int(substr($avihData, 12, 4));
// the ever-present flags
$MP3fileInfo['RIFF']['raw']['avih']['dwTotalFrames'] = LittleEndian2Int(substr($avihData, 16, 4));
// # frames in file
$MP3fileInfo['RIFF']['raw']['avih']['dwInitialFrames'] = LittleEndian2Int(substr($avihData, 20, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwStreams'] = LittleEndian2Int(substr($avihData, 24, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwSuggestedBufferSize'] = LittleEndian2Int(substr($avihData, 28, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwWidth'] = LittleEndian2Int(substr($avihData, 32, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwHeight'] = LittleEndian2Int(substr($avihData, 36, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwScale'] = LittleEndian2Int(substr($avihData, 40, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwRate'] = LittleEndian2Int(substr($avihData, 44, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwStart'] = LittleEndian2Int(substr($avihData, 48, 4));
$MP3fileInfo['RIFF']['raw']['avih']['dwLength'] = LittleEndian2Int(substr($avihData, 52, 4));
$MP3fileInfo['RIFF']['raw']['avih']['flags']['hasindex'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x10);
$MP3fileInfo['RIFF']['raw']['avih']['flags']['mustuseindex'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x20);
$MP3fileInfo['RIFF']['raw']['avih']['flags']['interleaved'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x100);
$MP3fileInfo['RIFF']['raw']['avih']['flags']['trustcktype'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x800);
$MP3fileInfo['RIFF']['raw']['avih']['flags']['capturedfile'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x10000);
$MP3fileInfo['RIFF']['raw']['avih']['flags']['copyrighted'] = (bool) ($MP3fileInfo['RIFF']['raw']['avih']['dwFlags'] & 0x20010);
$MP3fileInfo['RIFF']['video']["{$streamindex}"]['frame_width'] = $MP3fileInfo['RIFF']['raw']['avih']['dwWidth'];
$MP3fileInfo['RIFF']['video']["{$streamindex}"]['frame_height'] = $MP3fileInfo['RIFF']['raw']['avih']['dwHeight'];
$MP3fileInfo['RIFF']['video']["{$streamindex}"]['frame_rate'] = round(1000000 / $MP3fileInfo['RIFF']['raw']['avih']['dwMicroSecPerFrame'], 3);
$MP3fileInfo['playtime_seconds'] = $MP3fileInfo['RIFF']['raw']['avih']['dwTotalFrames'] * ($MP3fileInfo['RIFF']['raw']['avih']['dwMicroSecPerFrame'] / 1000000);
$MP3fileInfo['bitrate'] = $MP3fileInfo['filesize'] / $MP3fileInfo['playtime_seconds'] * 8;
}
if (isset($MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strh'][0]['data'])) {
if (is_array($MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strh'])) {
for ($i = 0; $i < count($MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strh']); $i++) {
if (isset($MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strh']["{$i}"]['data'])) {
$strhData = $MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strh']["{$i}"]['data'];
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['fccType'] = substr($strhData, 0, 4);
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['fccHandler'] = substr($strhData, 4, 4);
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwFlags'] = LittleEndian2Int(substr($strhData, 8, 4));
// Contains AVITF_* flags
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['wPriority'] = LittleEndian2Int(substr($strhData, 12, 2));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['wLanguage'] = LittleEndian2Int(substr($strhData, 14, 2));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwInitialFrames'] = LittleEndian2Int(substr($strhData, 16, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwScale'] = LittleEndian2Int(substr($strhData, 20, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwRate'] = LittleEndian2Int(substr($strhData, 24, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwStart'] = LittleEndian2Int(substr($strhData, 28, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwLength'] = LittleEndian2Int(substr($strhData, 32, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwSuggestedBufferSize'] = LittleEndian2Int(substr($strhData, 36, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwQuality'] = LittleEndian2Int(substr($strhData, 40, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['dwSampleSize'] = LittleEndian2Int(substr($strhData, 44, 4));
$MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['rcFrame'] = LittleEndian2Int(substr($strhData, 48, 4));
if (isset($MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strf']["{$i}"]['data'])) {
$strfData = $MP3fileInfo['RIFF']['AVI ']['hdrl']['strl']['strf']["{$i}"]['data'];
switch ($MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['fccType']) {
case 'auds':
if (isset($MP3fileInfo['RIFF']['audio']) && is_array($MP3fileInfo['RIFF']['audio'])) {
$streamindex = count($MP3fileInfo['RIFF']['audio']);
}
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['wFormatTag'] = LittleEndian2Int(substr($strfData, 0, 2));
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nChannels'] = LittleEndian2Int(substr($strfData, 2, 2));
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nSamplesPerSec'] = LittleEndian2Int(substr($strfData, 4, 4));
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nAvgBytesPerSec'] = LittleEndian2Int(substr($strfData, 8, 4));
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nBlockAlign'] = LittleEndian2Int(substr($strfData, 12, 2));
$MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nBitsPerSample'] = LittleEndian2Int(substr($strfData, 14, 2));
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['format'] = RIFFwFormatTagLookup($MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['wFormatTag']);
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channels'] = $MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nChannels'];
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channelmode'] = $MP3fileInfo['RIFF']['audio']["{$streamindex}"]['channels'] == 1 ? 'mono' : 'stereo';
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['frequency'] = $MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nSamplesPerSec'];
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitrate'] = $MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nAvgBytesPerSec'] * 8;
$MP3fileInfo['RIFF']['audio']["{$streamindex}"]['bitspersample'] = $MP3fileInfo['RIFF']['raw']['strf']['auds']["{$streamindex}"]['nBitsPerSample'];
break;
case 'vids':
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biSize'] = LittleEndian2Int(substr($strfData, 0, 4));
// number of bytes required by the BITMAPINFOHEADER structure
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biWidth'] = LittleEndian2Int(substr($strfData, 4, 4));
// width of the bitmap in pixels
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biHeight'] = LittleEndian2Int(substr($strfData, 8, 4));
// height of the bitmap in pixels. If biHeight is positive, the bitmap is a "bottom-up" DIB and its origin is the lower left corner. If biHeight is negative, the bitmap is a "top-down" DIB and its origin is the upper left corner
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biPlanes'] = LittleEndian2Int(substr($strfData, 12, 2));
// number of color planes on the target device. In most cases this value must be set to 1
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biBitCount'] = LittleEndian2Int(substr($strfData, 14, 2));
// Specifies the number of bits per pixels
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['fourcc'] = substr($strfData, 16, 4);
//
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biSizeImage'] = LittleEndian2Int(substr($strfData, 20, 4));
// size of the bitmap data section of the image (the actual pixel data, excluding BITMAPINFOHEADER and RGBQUAD structures)
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biXPelsPerMeter'] = LittleEndian2Int(substr($strfData, 24, 4));
// horizontal resolution, in pixels per metre, of the target device
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biYPelsPerMeter'] = LittleEndian2Int(substr($strfData, 28, 4));
// vertical resolution, in pixels per metre, of the target device
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biClrUsed'] = LittleEndian2Int(substr($strfData, 32, 4));
// actual number of color indices in the color table used by the bitmap. If this value is zero, the bitmap uses the maximum number of colors corresponding to the value of the biBitCount member for the compression mode specified by biCompression
$MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['biClrImportant'] = LittleEndian2Int(substr($strfData, 36, 4));
// number of color indices that are considered important for displaying the bitmap. If this value is zero, all colors are important
$MP3fileInfo['RIFF']['video']["{$streamindex}"]['codec'] = RIFFfourccLookup($MP3fileInfo['RIFF']['raw']['strh']["{$i}"]['fccHandler']);
if (!$MP3fileInfo['RIFF']['video']["{$streamindex}"]['codec'] && RIFFfourccLookup($MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['fourcc'])) {
RIFFfourccLookup($MP3fileInfo['RIFF']['raw']['strf']['vids']["{$streamindex}"]['fourcc']);
}
break;
}
}
}
}
}
}
break;
default:
unset($MP3fileInfo['fileformat']);
break;
}
if (isset($MP3fileInfo['RIFF']['WAVE']['INFO']) && is_array($MP3fileInfo['RIFF']['WAVE']['INFO'])) {
$MP3fileInfo['RIFF']['title'] = trim(substr($MP3fileInfo['RIFF']['WAVE']['INFO']['DISP'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['DISP']) - 1]['data'], 4));
$MP3fileInfo['RIFF']['artist'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['IART'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['IART']) - 1]['data']);
$MP3fileInfo['RIFF']['genre'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['IGNR'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['IGNR']) - 1]['data']);
$MP3fileInfo['RIFF']['comment'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ICMT'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ICMT']) - 1]['data']);
$MP3fileInfo['RIFF']['copyright'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ICOP'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ICOP']) - 1]['data']);
$MP3fileInfo['RIFF']['engineers'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['IENG'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['IENG']) - 1]['data']);
$MP3fileInfo['RIFF']['keywords'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['IKEY'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['IKEY']) - 1]['data']);
$MP3fileInfo['RIFF']['originalmedium'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['IMED'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['IMED']) - 1]['data']);
$MP3fileInfo['RIFF']['name'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['INAM'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['INAM']) - 1]['data']);
$MP3fileInfo['RIFF']['sourcesupplier'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ISRC'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ISRC']) - 1]['data']);
$MP3fileInfo['RIFF']['digitizer'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ITCH'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ITCH']) - 1]['data']);
$MP3fileInfo['RIFF']['subject'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ISBJ'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ISBJ']) - 1]['data']);
$MP3fileInfo['RIFF']['digitizationsource'] = trim($MP3fileInfo['RIFF']['WAVE']['INFO']['ISRF'][count($MP3fileInfo['RIFF']['WAVE']['INFO']['ISRF']) - 1]['data']);
}
foreach ($MP3fileInfo['RIFF'] as $key => $value) {
if (!is_array($value) && !$value) {
unset($MP3fileInfo['RIFF']["{$key}"]);
}
}
return TRUE;
}
