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<?php
// $Id$
/**
* @file
* Implement video rendering scheduling.
*
* @author Fabio Varesano <fvaresano at yahoo dot it>
*/
/**
* video_scheduler.php configuration
*/
// set to the ffmpeg executable
define('VIDEO_RENDERING_FFMPEG_PATH', '/usr/bin/ffmpeg');
// set to the temp file path.
//IMPORTANT: the user who runs this script must have permissions to create files there. If this is not the case the default php temporary folder will be used.
define('VIDEO_RENDERING_TEMP_PATH', '/tmp/video');
// number of conversion jobs active at the same time
define('VIDEO_RENDERING_FFMPEG_INSTANCES', 5);
/**
* video_scheduler.php configuration ends.
* DO NOT EDIT BELOW THIS LINE
*/
/**
* Define some constants
*/
define('VIDEO_RENDERING_PENDING', 0);
define('VIDEO_RENDERING_ACTIVE', 5);
define('VIDEO_RENDERING_COMPLETE', 10);
include_once './includes/bootstrap.inc';
// disable error reporting for bootstrap process
error_reporting(E_ERROR);
// let's bootstrap: we will be able to use drupal apis
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
// enable full error reporting again
error_reporting(E_ALL);
// allow execution only from the command line!
if(empty($_SERVER['REQUEST_METHOD'])) {
video_scheduler_main();
}
else {
print t('This script is only executable from the command line.');
die();
}
/**
* Main for video_scheduler.php
*/
function video_scheduler_main() {
if($jobs = video_scheduler_select()) {
foreach ($jobs as $job) {
video_scheduler_start($job);
}
}
else {
watchdog('video_scheduler', t('no video conversion jobs to schedule.'));
}
}
/**
* Starts rendering for a job
*/
function video_scheduler_start($job) {
exec("php video_render.php $job->nid $job->vid > /dev/null &");
}
/**
* Select VIDEO_RENDERING_FFMPEG_INSTANCES jobs from the queue
*
* @return an array containing jobs
*/
function video_scheduler_select() {
$result = db_query('SELECT * FROM {video_rendering} vr INNER JOIN {node} n ON vr.vid = n.vid INNER JOIN {video} v ON n.vid = v.vid WHERE n.nid = v.nid AND vr.nid = n.nid AND vr.status = %d ORDER BY n.created', VIDEO_RENDERING_PENDING);
// TODO: order jobs by priority
$jobs = array();
$i = 0;
$count = db_num_rows($result);
while($i < $count && $i < VIDEO_RENDERING_FFMPEG_INSTANCES) {
$jobs[] = db_fetch_object($result);
$i++;
}
return $jobs;
}
?>
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