getID3() by James Heinrich <info@getid3.org> // More...
Public Member Functions | |
| getid3_nsv (&$fd, &$ThisFileInfo) | |
| getNSVsHeaderFilepointer (&$fd, &$ThisFileInfo, $fileoffset) | |
| getNSVfHeaderFilepointer (&$fd, &$ThisFileInfo, $fileoffset, $getTOCoffsets=false) | |
| NSVframerateLookup ($framerateindex) | |
Detailed Description
getID3() by James Heinrich <info@getid3.org> //
Definition at line 17 of file module.audio-video.nsv.php.
Member Function Documentation
| getid3_nsv::getid3_nsv | ( | &$ | fd, | |
| &$ | ThisFileInfo | |||
| ) |
Definition at line 20 of file module.audio-video.nsv.php.
References getNSVfHeaderFilepointer(), and getNSVsHeaderFilepointer().
{
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$NSVheader = fread($fd, 4);
switch ($NSVheader) {
case 'NSVs':
if ($this->getNSVsHeaderFilepointer($fd, $ThisFileInfo, 0)) {
$ThisFileInfo['fileformat'] = 'nsv';
$ThisFileInfo['audio']['dataformat'] = 'nsv';
$ThisFileInfo['video']['dataformat'] = 'nsv';
$ThisFileInfo['audio']['lossless'] = false;
$ThisFileInfo['video']['lossless'] = false;
}
break;
case 'NSVf':
if ($this->getNSVfHeaderFilepointer($fd, $ThisFileInfo, 0)) {
$ThisFileInfo['fileformat'] = 'nsv';
$ThisFileInfo['audio']['dataformat'] = 'nsv';
$ThisFileInfo['video']['dataformat'] = 'nsv';
$ThisFileInfo['audio']['lossless'] = false;
$ThisFileInfo['video']['lossless'] = false;
$this->getNSVsHeaderFilepointer($fd, $ThisFileInfo, $ThisFileInfo['nsv']['NSVf']['header_length']);
}
break;
default:
$ThisFileInfo['error'][] = 'Expecting "NSVs" or "NSVf" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$NSVheader.'"';
return false;
break;
}
if (!isset($ThisFileInfo['nsv']['NSVf'])) {
$ThisFileInfo['warning'][] = 'NSVf header not present - cannot calculate playtime or bitrate';
}
return true;
}
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| getid3_nsv::getNSVfHeaderFilepointer | ( | &$ | fd, | |
| &$ | ThisFileInfo, | |||
| $ | fileoffset, | |||
| $ | getTOCoffsets = false | |||
| ) |
Definition at line 132 of file module.audio-video.nsv.php.
References getid3_lib::LittleEndian2Int().
Referenced by getid3_nsv().
{
fseek($fd, $fileoffset, SEEK_SET);
$NSVfheader = fread($fd, 28);
$offset = 0;
$ThisFileInfo['nsv']['NSVf']['identifier'] = substr($NSVfheader, $offset, 4);
$offset += 4;
if ($ThisFileInfo['nsv']['NSVf']['identifier'] != 'NSVf') {
$ThisFileInfo['error'][] = 'expected "NSVf" at offset ('.$fileoffset.'), found "'.$ThisFileInfo['nsv']['NSVf']['identifier'].'" instead';
unset($ThisFileInfo['nsv']['NSVf']);
return false;
}
$ThisFileInfo['nsv']['NSVs']['offset'] = $fileoffset;
$ThisFileInfo['nsv']['NSVf']['header_length'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
$ThisFileInfo['nsv']['NSVf']['file_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
if ($ThisFileInfo['nsv']['NSVf']['file_size'] > $ThisFileInfo['avdataend']) {
$ThisFileInfo['warning'][] = 'truncated file - NSVf header indicates '.$ThisFileInfo['nsv']['NSVf']['file_size'].' bytes, file actually '.$ThisFileInfo['avdataend'].' bytes';
}
$ThisFileInfo['nsv']['NSVf']['playtime_ms'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
$ThisFileInfo['nsv']['NSVf']['meta_size'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
$ThisFileInfo['nsv']['NSVf']['TOC_entries_1'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
$ThisFileInfo['nsv']['NSVf']['TOC_entries_2'] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
if ($ThisFileInfo['nsv']['NSVf']['playtime_ms'] == 0) {
$ThisFileInfo['error'][] = 'Corrupt NSV file: NSVf.playtime_ms == zero';
return false;
}
$NSVfheader .= fread($fd, $ThisFileInfo['nsv']['NSVf']['meta_size'] + (4 * $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) + (4 * $ThisFileInfo['nsv']['NSVf']['TOC_entries_2']));
$NSVfheaderlength = strlen($NSVfheader);
$ThisFileInfo['nsv']['NSVf']['metadata'] = substr($NSVfheader, $offset, $ThisFileInfo['nsv']['NSVf']['meta_size']);
$offset += $ThisFileInfo['nsv']['NSVf']['meta_size'];
if ($getTOCoffsets) {
$TOCcounter = 0;
while ($TOCcounter < $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) {
if ($TOCcounter < $ThisFileInfo['nsv']['NSVf']['TOC_entries_1']) {
$ThisFileInfo['nsv']['NSVf']['TOC_1'][$TOCcounter] = getid3_lib::LittleEndian2Int(substr($NSVfheader, $offset, 4));
$offset += 4;
$TOCcounter++;
}
}
}
if (trim($ThisFileInfo['nsv']['NSVf']['metadata']) != '') {
$ThisFileInfo['nsv']['NSVf']['metadata'] = str_replace('`', "\x01", $ThisFileInfo['nsv']['NSVf']['metadata']);
$CommentPairArray = explode("\x01".' ', $ThisFileInfo['nsv']['NSVf']['metadata']);
foreach ($CommentPairArray as $CommentPair) {
if (strstr($CommentPair, '='."\x01")) {
list($key, $value) = explode('='."\x01", $CommentPair, 2);
$ThisFileInfo['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01", '', $value));
}
}
}
$ThisFileInfo['playtime_seconds'] = $ThisFileInfo['nsv']['NSVf']['playtime_ms'] / 1000;
$ThisFileInfo['bitrate'] = ($ThisFileInfo['nsv']['NSVf']['file_size'] * 8) / $ThisFileInfo['playtime_seconds'];
return true;
}
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| getid3_nsv::getNSVsHeaderFilepointer | ( | &$ | fd, | |
| &$ | ThisFileInfo, | |||
| $ | fileoffset | |||
| ) |
Definition at line 60 of file module.audio-video.nsv.php.
References getid3_lib::LittleEndian2Int(), and NSVframerateLookup().
Referenced by getid3_nsv().
{
fseek($fd, $fileoffset, SEEK_SET);
$NSVsheader = fread($fd, 28);
$offset = 0;
$ThisFileInfo['nsv']['NSVs']['identifier'] = substr($NSVsheader, $offset, 4);
$offset += 4;
if ($ThisFileInfo['nsv']['NSVs']['identifier'] != 'NSVs') {
$ThisFileInfo['error'][] = 'expected "NSVs" at offset ('.$fileoffset.'), found "'.$ThisFileInfo['nsv']['NSVs']['identifier'].'" instead';
unset($ThisFileInfo['nsv']['NSVs']);
return false;
}
$ThisFileInfo['nsv']['NSVs']['offset'] = $fileoffset;
$ThisFileInfo['nsv']['NSVs']['video_codec'] = substr($NSVsheader, $offset, 4);
$offset += 4;
$ThisFileInfo['nsv']['NSVs']['audio_codec'] = substr($NSVsheader, $offset, 4);
$offset += 4;
$ThisFileInfo['nsv']['NSVs']['resolution_x'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
$offset += 2;
$ThisFileInfo['nsv']['NSVs']['resolution_y'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
$offset += 2;
$ThisFileInfo['nsv']['NSVs']['framerate_index'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown1b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown1c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown1d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown2a'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown2b'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown2c'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
//$ThisFileInfo['nsv']['NSVs']['unknown2d'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
switch ($ThisFileInfo['nsv']['NSVs']['audio_codec']) {
case 'PCM ':
$ThisFileInfo['nsv']['NSVs']['bits_channel'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
$ThisFileInfo['nsv']['NSVs']['channels'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
$offset += 1;
$ThisFileInfo['nsv']['NSVs']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 2));
$offset += 2;
$ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['nsv']['NSVs']['sample_rate'];
break;
case 'MP3 ':
case 'NONE':
default:
//$ThisFileInfo['nsv']['NSVs']['unknown3'] = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 4));
$offset += 4;
break;
}
$ThisFileInfo['video']['resolution_x'] = $ThisFileInfo['nsv']['NSVs']['resolution_x'];
$ThisFileInfo['video']['resolution_y'] = $ThisFileInfo['nsv']['NSVs']['resolution_y'];
$ThisFileInfo['nsv']['NSVs']['frame_rate'] = $this->NSVframerateLookup($ThisFileInfo['nsv']['NSVs']['framerate_index']);
$ThisFileInfo['video']['frame_rate'] = $ThisFileInfo['nsv']['NSVs']['frame_rate'];
$ThisFileInfo['video']['bits_per_sample'] = 24;
$ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1;
return true;
}
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| getid3_nsv::NSVframerateLookup | ( | $ | framerateindex | ) |
Definition at line 205 of file module.audio-video.nsv.php.
Referenced by getNSVsHeaderFilepointer().
{
if ($framerateindex <= 127) {
return (float) $framerateindex;
}
static $NSVframerateLookup = array();
if (empty($NSVframerateLookup)) {
$NSVframerateLookup[129] = (float) 29.970;
$NSVframerateLookup[131] = (float) 23.976;
$NSVframerateLookup[133] = (float) 14.985;
$NSVframerateLookup[197] = (float) 59.940;
$NSVframerateLookup[199] = (float) 47.952;
}
return (isset($NSVframerateLookup[$framerateindex]) ? $NSVframerateLookup[$framerateindex] : false);
}
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The documentation for this class was generated from the following file:
- Services/MediaObjects/getid3/getid3/module.audio-video.nsv.php
