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MP4Info.php
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MP4Info.php
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<?php
/**
* MP4Info
*
* @author Tommy Lacroix <lacroix.tommy@gmail.com>
* @copyright Copyright (c) 2006-2009 Tommy Lacroix
* @license LGPL version 3, http://www.gnu.org/licenses/lgpl.html
* @package php-mp4info
* @link $HeadURL$
*/
// ---
/**
* MP4Info main class
*
* @author Tommy Lacroix <lacroix.tommy@gmail.com>
* @version 1.1.20090611 $Id$
*/
class MP4Info {
// {{{ Audio codec types
const MP4_AUDIO_CODEC_UNCOMPRESSED = 0x00;
const MP4_AUDIO_CODEC_MP3 = 0x02;
const MP4_AUDIO_CODEC_LINEAR_PCM = 0x03;
const MP4_AUDIO_CODEC_LOG_PCM = 0x04;
const MP4_AUDIO_CODEC_AAC = 0xe0;
// }}}
// {{{ Video codec types
const MP4_VIDEO_CODEC_DVPP = 0x01;
const MP4_VIDEO_CODEC_DV5P = 0x02;
const MP4_VIDEO_CODEC_H264 = 0xe0;
// }}}
/**
* Debug mode
*
* @var bool
*/
public static $debugMode = false;
/**
* Get information from MP4 file
*
* @author Tommy Lacroix <lacroix.tommy@gmail.com>
* @param string $file
* @return array
* @access public
* @static
*/
public static function getInfo($file) {
// Open file
$f = fopen($file,'rb');
if (!$f) {
throw new Exception('Cannot open file: '.$file);
}
// Get all boxes
try {
while (($box = MP4Info_Box::fromStream($f))) {
$boxes[] = $box;
}
} catch (Exception $e) { }
// Close
fclose($f);
// Return info
return self::getInfoFromBoxes($boxes);
} // getInfo method
/**
* Get information from MP4 boxes
*
* @author Tommy Lacroix <lacroix.tommy@gmail.com>
* @param string $file
* @return array
* @access public
* @static
*/
public static function getInfoFromBoxes($boxes, &$context=null) {
if ($context === null) {
$context = new stdClass();
$context->hasVideo = false;
$context->hasAudio = false;
$context->video = new stdClass();
$context->audio = new stdClass();
}
foreach ($boxes as &$box) {
// Interpret box
switch ($box->getBoxTypeStr()) {
case 'hdlr':
switch ($box->getHandlerType()) {
case MP4Info_Box_hdlr::HANDLER_VIDEO:
$context->hasVideo = true;
break;
case MP4Info_Box_hdlr::HANDLER_SOUND:
$context->hasAudio = true;
break;
case chr(0x17).'Tim': // QuickTime Specific
case chr(0x18).'App': // QuickTime Specific
case chr(0x19).'App': // QuickTime Specific
break;
}
$context->creationTime = $box->getCreationTime();
$context->modificationTime = $box->getModificationTime();
break;
case 'mvhd':
$context->duration = $box->getRealDuration();
break;
case 'ilst':
if ($box->hasValue('©too')) {
$context->encoder = $box->getValue('©too');
}
break;
case 'uuid':
$meta = $box->getXMPMetaData();
if ($meta !== false) {
// Try to get duration
if (!isset($context->duration)) {
if (preg_match('/<(|[a-z]+:)duration[\s\n\r]([^>]*)>/im',$meta,$m)) {
if (preg_match_all('/xmpDM:([a-z]+)="([^"]+)"/',$m[2],$mm)) {
$value = $scale = false;
foreach ($mm[1] as $k=>$v) {
if (($v == 'value') || ($v == 'scale')) {
if (preg_match('/^1\/([0-9]+)$/',$mm[2][$k],$mmm)) {
$mm[2][$k] = 1/$mmm[1];
}
$$v = $mm[2][$k];
}
}
if (($value !== false) && ($scale !== false)) {
$context->duration = $value*$scale;
}
}
}
}
// Try to get size
if ((!isset($context->width)) || (!isset($context->height))) {
if (preg_match('/<(|[a-z]+:)videoFrameSize[\s\n\r]([^>]*)>/im',$meta,$m)) {
if (preg_match_all('/[a-z]:([a-z]+)="([^"]+)"/',$m[2],$mm)) {
$w = $h = false;
foreach ($mm[1] as $k=>$v) {
if (($v == 'w') || ($v == 'h')) {
$$v = $mm[2][$k];
}
}
if ($w != false) {
$context->video->width = $w;
$context->hasVideo = true;
}
if ($h != false) {
$context->video->height = $h;
$context->hasVideo = true;
}
}
}
}
// Try to get encoder
if (preg_match('/softwareAgent="([^"]+)"/i',$meta,$m)) {
$context->encoder = $m[1];
}
// Try to get audio channels
if (preg_match('/audioChannelType="([^"]+)"/i',$meta,$m)) {
switch (strtolower($m[1])) {
case 'stereo':
case '2':
$context->audio->channels = 2;
$context->hasAudio = true;
break;
case 'mono':
case '1':
$context->audio->channels = 1;
$context->hasAudio = true;
break;
case '5.1':
case '5':
$context->audio->channels = 5;
$context->hasAudio = true;
break;
}
}
// Try to get audio frequency
if (preg_match('/audioSampleRate="([^"]+)"/i',$meta,$m)) {
$context->audio->frequency = $m[1]/1000;
$context->hasAudio = true;
}
// Try to get video frame rate
if (preg_match('/videoFrameRate="([^"]+)"/i',$meta,$m)) {
$context->video->fps = $m[1];
$context->hasVideo = true;
}
//print htmlentities($meta);
}
break;
case 'stsd':
$values = $box->getValues();
foreach (array_keys($values) as $codec) {
switch ($codec) {
case 'sowt':
case 'twos':
case 'in24':
case 'in32':
case 'fl32':
case 'fl64':
$context->audio->codec = self::MP4_AUDIO_CODEC_LINEAR_PCM;
$context->audio->codecStr = 'Linear PCM';
$context->hasAudio = true;
break;
case 'alaw':
case 'ulaw':
$context->audio->codec = self::MP4_AUDIO_CODEC_LOG_PCM;
$context->audio->codecStr = 'Logarithmic PCM';
$context->hasAudio = true;
break;
case '.mp3':
$context->audio->codec = self::MP4_AUDIO_CODEC_MP3;
$context->audio->codecStr = 'MP3';
$context->hasAudio = true;
break;
case 'mp4a':
case 'mp4s':
$context->audio->codec = self::MP4_AUDIO_CODEC_AAC;
$context->audio->codecStr = 'AAC';
$context->hasAudio = true;
break;
case 'avc1':
case 'h264':
case 'H264':
$context->video->codec = self::MP4_VIDEO_CODEC_H264;
$context->video->codecStr = 'H.264';
$context->hasVideo = true;
break;
case 'dvpp':
$context->video->codec = self::MP4_VIDEO_CODEC_DVPP;
$context->video->codecStr = 'DVCPRO PAL';
$context->hasVideo = true;
break;
case 'dv5p':
$context->video->codec = self::MP4_VIDEO_CODEC_DV5P;
$context->video->codecStr = 'DVCPRO50';
$context->hasVideo = true;
break;
}
}
break;
case 'tkhd':
if ($box->getWidth() > 0) {
$context->hasVideo = true;
$context->video->width = $box->getWidth();
$context->video->height = $box->getHeight();
$context->hasVideo = true;
}
break;
}
// Process children
if ($box->hasChildren()) {
self::getInfoFromBoxes($box->children(), $context);
}
}
return $context;
} // getInfoFromBoxes method
/**
* Display boxes for debugging
*
* @param MP4Info_Box[] $boxes
* @param int $level
* @access public
* @static
*/
public static function displayBoxes($boxes,$level=0) {
foreach ($boxes as $box) {
print str_repeat(' ',$level*4) . $box->toString() . '<br>';
if ($box->hasChildren()) {
$this->displayBoxes($box->children(), $level+1);
}
}
} // displayBoxes method
} // MP4Info class
// ---
// {{{ Dependencies
include "MP4Info/Helper.php";
include "MP4Info/Exception.php";
include "MP4Info/Box.php";
// }}} Dependencies