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<?php
// $Id$
/**
* @file
* Enable addition of optional metadata on video nodes created by video module.
*
* @author Fabio Varesano <fvaresano at yahoo dot it>
*/
/**
* Implementation of hook_help().
*/
function video_optmetadata_help($section) {
switch ($section) {
case 'admin/modules#description':
return t('Enable addition of optional metadata on video nodes created by video module. Optional metadata are Video Bitrate, Audio Bitrate, Audio Sampling Rate and Audio Channels.');
}
}
/**
* Implementation of hook_perm().
*/
function video_optmetadata_perm() {
return array('insert optional metadata');
}
/**
* Implementation of hook_form_alter()
* We use this to add some fields to the video creation form.
* In those fields users will be able to insert some video metadatas.
*/
function video_optmetadata_form_alter($form_id, &$form) {
if($form_id == 'video_node_form' && isset($form['video']) && user_access('insert optional metadata')) {
// get node object
$node = $form['#node'];
// Optional Video Metadata. We display this group expanded only if displaying of optional metadata is enabled.
$form['metadata'] = array(
'#type' => 'fieldset',
'#title' => t('Optional Metadata'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#weight' => -16,
'#description' => t('Insert here the metadata informations.')
);
$form['metadata']['video_bitrate'] = array(
'#type' => 'textfield',
'#title' => t('Video Bitrate'),
'#length' => 11,
'#maxlength' => 11,
'#default_value' => $node->video_bitrate,
'#description' => t('Video bitrate in kbits/sec.')
);
$form['metadata']['audio_bitrate'] = array(
'#type' => 'textfield',
'#title' => t('Audio Bitrate'),
'#length' => 11,
'#maxlength' => 11,
'#default_value' => $node->audio_bitrate,
'#description' => t('Audio bitrate in kbits/sec.')
);
$form['metadata']['audio_sampling_rate'] = array(
'#type' => 'select',
'#title' => t('Audio Sampling Rate'),
'#options' => array(0 => 'none', 8000 => '8 kHz', 11025 => '11 kHz', 16000 => '16 kHz', 22050 => '22 kHz', 32000 => '32 kHz', 44100 => '44.1 kHz', 48000 => '48 kHz', 96000 => '96 kHz', 192400 => '192 kHz'),
'#default_value' => $node->audio_sampling_rate,
'#description' => t('Integer value of audio sampling rate in Hz.')
);
$form['metadata']['audio_channels'] = array(
'#type' => 'select',
'#title' => t('Audio Channels'),
'#options' => array('' => 'none', '5.1' => t('5.1'), 'stereo' => t('Stereo'), 'mono' => t('Mono')),
'#default_value' => $node->audio_channels
);
// Ends Video Optional Metadata
}
}
/**
* Implementation of hook_nodeapi()
*/
function video_optmetadata_nodeapi(&$node, $op, $teaser) {
if($node->type == 'video') {
switch ($op) {
case 'view':
//Add the HTML formatted output of the optional video metadata to the bottom.
$node->body .= theme('video_metadata', $node);
break;
}
}
}
/**
* Display optional metadata (Video and Audio bitrate,..) on the view page.
*
* @param $node
* object with node information
*
* @return
* string of content to display
$node->video_bitrate, $node->audio_bitrate, $node->audio_sampling_rate, $node->audio_channels,
*/
function theme_video_metadata($node) {
//Make sure atleast one fields had data.
if ($node->video_bitrate != 0 or $node->audio_bitrate != 0 or $node->audio_sampling_rate != 0 or $node->audio_channels != 0) {
$output = "\n\n<div class=\"video_metadata\">\n";
$output .= ' <div class="title"><h2>'.t('Video Metadata')."</h2></div>\n";
if($node->video_bitrate != 0) {
$fields[] = array('title' => t('Video Bitrate') . ':', 'body' => $node->video_bitrate . ' ' . t('kbits/sec'));
}
if($node->audio_bitrate != 0) {
$fields[] = array('title' => t('Audio Bitrate') . ':', 'body' => $node->audio_bitrate . ' ' . t('kbits/sec'));
}
if($node->audio_sampling_rate != 0) {
$fields[] = array('title' => t('Audio Sampling Rate') . ':', 'body' => $node->audio_sampling_rate . ' ' . t('Hz'));
}
if($node->audio_channels != '') {
$fields[] = array('title' => t('Audio Channels') . ':', 'body' => $node->audio_channels);
}
$output .= theme('video_fields', $fields); //Generate the fields HTML.
$output .= '</div>'; //Closing div video_metadata
}
else { //If all the fields are blank then display nothing.
$output = '';
}
return $output;
}
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