function getMetadata( $image, $path ) {
$metadata = array( 'version' => self::METADATA_VERSION );
if ( !class_exists( 'File_Ogg' ) ) {
require( 'File/Ogg.php' );
}
try {
$f = new File_Ogg( $path );
$streams = array();
foreach ( $f->listStreams() as $streamIDs ) {
foreach ( $streamIDs as $streamID ) {
$stream = $f->getStream( $streamID );
$streams[$streamID] = array(
'serial' => $stream->getSerial(),
'group' => $stream->getGroup(),
'type' => $stream->getType(),
'vendor' => $stream->getVendor(),
'length' => $stream->getLength(),
'size' => $stream->getSize(),
'header' => $stream->getHeader(),
'comments' => $stream->getComments()
);
}
}
$metadata['streams'] = $streams;
$metadata['length'] = $f->getLength();
// Get the offset of the file (in cases where the file is a segment copy)
$metadata['offset'] = $f->getStartOffset();
} catch ( PEAR_Exception $e ) {
// File not found, invalid stream, etc.
$metadata['error'] = array(
'message' => $e->getMessage(),
'code' => $e->getCode()
);
}
return serialize( $metadata );
}
function loadMeta()
{
//load from the file:
if (is_file($this->oggPath . OGGCHOP_META_EXT)) {
$oggMeta = file_get_contents($this->oggPath . OGGCHOP_META_EXT);
//check if a separate request is working on generating the file:
if (trim($oggMeta) == 'loading') {
if ($this->loadWaitCount >= 24) {
//we have waited 2 min with no luck..
//@@todo we should flag that ogg file as broken?
// and just redirect to normal output? (for now just set meta to false)
$this->meta = false;
//fail:
return false;
} else {
//some other request is "loading" metadata sleep for 5 seconds and try again
sleep(5);
$this->loadWaitCount++;
return $this->loadMeta();
}
} else {
$this->meta = unserialize($oggMeta);
if ($this->meta['version'] == 'OGGCHOP_META_VERSION') {
//we have a good version of the metadata return true:
return true;
} else {
$this->meta = false;
}
}
}
//if the file does not exist or $this->meta is still false::
if (!is_file($this->oggPath . OGGCHOP_META_EXT) || $this->meta === false) {
//set the meta file to "loading" (avoids multiple indexing requests)
file_put_contents($this->oggPath . OGGCHOP_META_EXT, 'loading');
//load up the File/Ogg Pear module
if (!class_exists('File_Ogg')) {
require 'File/Ogg.php';
}
$f = new File_Ogg($this->oggPath);
$streams = array();
$this->meta = array('version' => OGGCHOP_META_VERSION);
foreach ($f->listStreams() as $streamType => $streamIDs) {
foreach ($streamIDs as $streamID) {
$stream = $f->getStream($streamID);
//for now only support a fist theora stream we find:
if (strtolower($stream->getType()) == 'theora') {
$this->meta['theoraKeyFrameInx'] = $stream->getKeyFrameIndex();
//set the width and height:
$head = $stream->getHeader();
$this->meta['width'] = $head['PICW'];
$this->meta['height'] = $head['PICH'];
break;
}
/* more detailed per-stream metadata::
* $this->meta['streams'][$streamID] = array(
'serial' => $stream->getSerial(),
'group' => $stream->getGroup(),
'type' => $stream->getType(),
'vendor' => $stream->getVendor(),
'length' => $stream->getLength(),
'size' => $stream->getSize(),
'header' => $stream->getHeader(),
'comments' => $stream->getComments()
);*/
}
}
$this->meta['duration'] = $f->getLength();
//cache the metadata::
file_put_contents($this->oggPath . OGGCHOP_META_EXT, serialize($this->meta));
return true;
}
}
