Please see https://military.wikia.org/wiki/Lantaka
where a good description and notes also about bamboo cannon are placed as well as this Miriam Lela weapon which as previously noted can be a double barrel affair...
A quotation from the reference states Quote "Typically the earliest cannon with beautiful ornaments from this region are from foundries in the Malacca and Pahang, with later models from foundries in the Netherlands and Portugal, next from their respective settlements, and finally from Brunei and other local craftsmen. However, there were also double-barreled variants that were used extensively in the Philippines. In Malaysia, these double-barreled variants are called Meriam Lela (Malay for 'Lela Cannon') and appears to be longer than a typical Lantaka." Unquote.
Intriguing that this weapon had a number of roles including honouring dignitaries with gun salutes, protecting from pirates and as a barter system and gifted for safe passage.
Ibrahiim al Balooshi.