[Libvisual-devel] Livido wrapper for libvisual, a first look

[salsaman <sal...@xs...>]

Hi,
here is a first attempt at a libvisual wrapper. It is by no means 
complete yet, but I am showing you so you can all see the basic structure.

Start by looking at the livido_setup function. Here we set the channels, 
no input channels, and one output channel for each plugin.

In the livido_setup there will be a factory method to get the list of 
libvisual plugins and create the out_palettes array for each one.
(Currently I have this fixed at BGR24, this is just so that it gets 
loaded in LiVES). Livido_setup will return the array fx[] with one entry 
for each plugin.

The other functions will have the following uses:

libvis_init : here is where a particular instance of a plugin will be 
loaded and the negotiation done. Host will have picked a palette from 
the allowed list for that plugin, and will have set a channel size 
(width and height).

libvis_deinit : here the plugin instance will be unloaded

libvis_process : here is where a frame will be requested from a plugin 
instance, and the result returned in the out channel.

Note I am using a slightly old version of livido. In the current version 
the names of palettes have changed to e.g. RGB888, there are a few other 
changes, but nothing that really affects this particular wrapper.


Regards,
Salsaman.