Example code:

from rest_framework.pagination import PageNumberPagination
from rest_framework.response import Response


__all__ = ['DefaultPagination']

class DefaultPagination(PageNumberPagination):
    page_size = 24
    page_size_query_param = 'items_per_page'

    def get_paginated_response(self, data):
        return Response({
            'links': {
                'next': self.get_next_link(),
                'previous': self.get_previous_link()
            },
            'count': self.page.paginator.count,
            'total_pages': self.page.paginator.num_pages,
            'items_per_page':self.page_size,
            'results': data
        })

    def paginate_queryset(self,queryset, request, view=None):
        if request.GET.get('pagination') == 'inactive':
            self.page_size = queryset.count()
        return super(DefaultPagination, self).paginate_queryset(queryset, request, view)