> >> 1. Create a configuration registry
> >
> > How do I do this?
> >
> > config_reg = bg_cfg_registry_create();
> > // what do I load here if I want an encoder????
> > tmp_path = bg_search_file_read("recorder", "config.xml");
> > bg_cfg_registry_load(config_reg, tmp_path);
>
> You'll always load all kinds of plugins.
>
> The "recorder" means, that we will try to load
> ~/.gmerlin/recorder/config.xml, it's basically the name of the
> application, which will translate into a directory under ~/.gmerlin.
> In this directory, applications can store all their private data. E.g.
> the GUI player saves the media tree here.
I just want to load plugins to encode video/audio. How do I do that?
It is not obvious to me from the code.
I can see that bg_search_file_read gets a file path. But, I don't
know what is supposed to be in "config.xml" or why I even bother loading
it?
Do I even need to do this step?
> You can use any other path for this of course.
>
> >> 2. Create a plugin registry
> >
> > I see I am supposed to do something like:
> > section = bg_cfg_registry_find_section(config_reg, "plugins");
> > plug_reg = bg_plugin_registry_create(section);
> >
> > what is a bg_cfg_section_t ?
>
> A section is a like a "directory" in the config registry. It can contain
> parameters (name-value pairs) and subsections.
> In all my applications I have a section "plugins". It contains
> one subsection for each plugin.
what is a config registry?
> Passing the "plugins" section to the plugin registry has the advantage,
What is a plugin registry? How does it get built?
> that the plugin registry will usually set the plugin parameters to the
> the last saved values when it loads a plugin. All you need to do is to
> store all parameters, you pass via set_parameter(), also in the
> section for the plugin. My gtk dialogs do this automatically.
>
> Splitting the configuration registry into sections has the advantage, that
> it's less painful to find unique names for parameters if you have a large
> number of plugins. parameter names must only be unique within their
> section.
Where do I find the encoders registry?
> > What are all these steps? I can't find any doku or simple source code
> > on it and I have been looking for days now.
>
> If you have an idea to improve the documentation or provide some simple
> examples, go ahead. Of course clarifying patches for Doxygen comments
> are *highly* welcome.
I will try to cobble together a simple tutorial or something if that
helps. But, first I need to understand what these things do. I
cannot find any sort of overview anywhere. Can you explain a little
more, or point me to where I can read about it?
> Once you created a plugin registry, you can get the available encoders
> with:
>
> const bg_plugin_info_t * info;
>
> int num =
> bg_plugin_registry_get_num_plugins(plugin_reg,
> BG_PLUGIN_ENCODER_AUDIO |
> BG_PLUGIN_ENCODER_VIDEO |
> BG_PLUGIN_ENCODER,
> BG_PLUGIN_FILE);
>
> for(i = 0; i < num; i++)
> {
> info = bg_plugin_find_by_index(plugin_reg, i,
> BG_PLUGIN_ENCODER_AUDIO |
> BG_PLUGIN_ENCODER_VIDEO |
> BG_PLUGIN_ENCODER,
> BG_PLUGIN_FILE);
> }
This starts to make a little sense, but I am still blurry on how to make
the plugin_reg.
I assume from the bg_plugin_info_t, I can see if it is "ogg/theora" or
"x264", etc? No?
> With this method you can query for any combination of plugin types.
> Only the last 2 arguments must be identical for
> bg_plugin_registry_get_num_plugins() and bg_plugin_find_by_index().
>
> > I can't get past steps 1 and 2. I'm sure I'll have questions on the
> > rest soon.
>
> No problem. Maybe telling others how to use this helps me finding ways to
> make it easier (or explain better).
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