wp-includes/class-avif-info.php:766Parses a file stream.
bool public function parse_file() { $box = new Box(); while ( $box->parse( $this->handle, $this->num_parsed_boxes ) == FOUND ) { if ( $box->type === 'meta' ) { if ( $this->parse_meta( $box->content_size ) != FOUND ) { return false; } return true; } if ( !skip( $this->handle, $box->content_size ) ) { return false; } } return false; // No "meta" no good. }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-avif-info.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.