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New subtitle support #49

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New subtitle support #49

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6ecc3be
fix for new subtitles, fixes #48
ferishili Mar 25, 2024
5474f2e
coding style correction
ferishili Mar 26, 2024
33b6ebc
according to suggestions
ferishili Jun 27, 2024
1beeca6
Merge branch 'master' into issue-48
ferishili Jul 17, 2024
c975487
change according to request,
ferishili Jul 17, 2024
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59 changes: 57 additions & 2 deletions classes/local/paella_transform.php
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Original file line number Diff line number Diff line change
Expand Up @@ -255,10 +255,40 @@ private static function get_captions($publication) {
foreach ($publication->media as $media) {
list($type1, $type2) = explode('/', $media->flavor, 2);
if ($type1 === 'captions') {
list($format, $lang) = explode('+', $type2, 2);
$lang = 'undefined';
$format = 'vtt'; // Default standard format.
$text = 'unknown';
// Prior to Opencast 15 or manually added subtitles in block opencast.
if (strpos($type2, 'vtt+') !== false) {
list($format, $lang) = explode('+', $type2, 2);
$text = $lang;
} else if (in_array($type2, ['delivery', 'prepared', 'vtt']) && !empty($media->tags)) { // Opencast 15 coverage.
$tagdataarr = [];
foreach ($media->tags as $tag) {
// The safety checker.
if (!is_string($tag)) {
continue;
}
if (strpos($tag, 'lang:') !== false) {
$lang = str_replace('lang:', '', $tag);
$tagdataarr['lang'] = $lang;
}
if (strpos($tag, 'generator-type:') !== false) {
$tagdataarr['generatortype'] = str_replace('generator-type:', '', $tag);
}
if (strpos($tag, 'generator:') !== false) {
$tagdataarr['generator'] = str_replace('generator:', '', $tag);
}
if (strpos($tag, 'type:') !== false) {
$tagdataarr['type'] = str_replace('type:', '', $tag);
}
}
$text = self::prepare_caption_text($tagdataarr);
list($mimefiletype, $format) = explode('/', $media->mediatype, 2);
}
$captions[] = [
'lang' => $lang,
'text' => $lang,
'text' => $text,
'format' => $format,
'url' => $media->url,
];
Expand All @@ -267,6 +297,31 @@ private static function get_captions($publication) {
return $captions;
}

/**
* Generates the caption text in case the caption info is included in the tags (as introduced in Opencast 15)
* @param array $tagdataarr array of caption data.
* @return string the complied text for the caption.
*/
private static function prepare_caption_text($tagdataarr) {
$titlearr = [];
if (array_key_exists('lang', $tagdataarr)) {
$titlearr[] = $tagdataarr['lang'];
}
if (array_key_exists('generator', $tagdataarr)) {
$generator = ucfirst($tagdataarr['generator']);
$titlearr[] = $generator;
}
if (array_key_exists('generatortype', $tagdataarr)) {
$generatortype = $tagdataarr['generatortype'] === 'auto' ? 'A' : 'M';
$titlearr[] = "($generatortype)";
}
if (array_key_exists('type', $tagdataarr)) {
$type = ucfirst($tagdataarr['type']);
$titlearr[] = "($type)";
}
return implode(' - ', $titlearr);
}

/**
* Returns the video data from Opencast in the format for the paella player.
* @param int $ocinstanceid Opencast instance id
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