wp-includes/ID3/module.audio-video.matroska.php:1661$lacingtypeintstring|int public static function BlockLacingType($lacingtype) { // http://matroska.org/technical/specs/index.html#block_structure static $BlockLacingType = array(); if (empty($BlockLacingType)) { $BlockLacingType[0x00] = 'no lacing'; $BlockLacingType[0x01] = 'Xiph lacing'; $BlockLacingType[0x02] = 'fixed-size lacing'; $BlockLacingType[0x03] = 'EBML lacing'; } return (isset($BlockLacingType[$lacingtype]) ? $BlockLacingType[$lacingtype] : $lacingtype); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ID3/module.audio-video.matroska.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.