Rockbox Development > Starting Development and Compiling

Running a .rock file from a menu

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mschneider:
I've configured a menu with a new option "goto *insert plugin here*". Now I've set a path in settings.h for the files and tried using the function plugin_load to run it but i just get a freeze.
I would configure in settings.h:

--- Code: ---#define     PLUGIN    PLUGIN_GAMES_DIR "/bubbles.rock"
--- End code ---

I would then insert it into a context menu in onplay.c as MENUITEM_FUNCTION with the function looking something like this:


--- Code: ---void goto_plugin(void)
{
    plugin_load(PLUGIN, NULL);
    return;
}
--- End code ---

Everything compiles but whenever i select the item in the menu everything just freezes. Is there some other function i could use or am i doing something wrong?

linuxstb:
The Credits screen is a plugin, called from a menu.  Finding the code that loads that should give you a clue.

LinusN:
The code looks conceptually correct, but I hope you aren't using PLUGIN as the name for your plugin #define. It would be easier to help you if you showed us the actual code. Do you get any warnings when you compile it?

mschneider:
yes i've taken a look at the main menu file that accesses the credits and it's doing pretty much the same thing (mine is not in a conditional). Here's my modification in settings.h:


--- Code: ---#define FMPRESET_PATH ROCKBOX_DIR "/fmpresets"

#define VIEWERS_CONFIG      ROCKBOX_DIR "/viewers.config"
#define CONFIGFILE          ROCKBOX_DIR "/config.cfg"
#define FIXEDSETTINGSFILE   ROCKBOX_DIR "/fixed.cfg"

#define CUBE    PLUGIN_DEMOS_DIR "/cube.rock"

#define MAX_FILENAME 32


#define BOOKMARK_NO  0
#define BOOKMARK_YES 1
#define BOOKMARK_ASK 2

--- End code ---


And here is what i'm doing in onplay.c to modify the wps context menu:


--- Code: ---static void cube_demo(void)
{
    api->audio_stop();
    plugin_load(CUBE, NULL);
    return;
}

MENUITEM_FUNCTION(view_cue_item, 0, ID2P(LANG_BROWSE_CUESHEET),
                  view_cue, NULL, view_cue_item_callback, Icon_NOICON);

/* CONTEXT_WPS items */
MENUITEM_FUNCTION(browse_id3_item, 0, ID2P(LANG_MENU_SHOW_ID3_INFO),
                  browse_id3, NULL, NULL, Icon_NOICON);
#ifdef HAVE_PITCHSCREEN
MENUITEM_FUNCTION(pitch_screen_item, 0, ID2P(LANG_PITCH),
                  pitch_screen, NULL, NULL, Icon_Audio);
#endif

MENUITEM_FUNCTION(goto_demo, 0, "Goto Demo", cube_demo, NULL, NULL, Icon_NOICON);

--- End code ---

...and further down the menu is made:


--- Code: ---            
MAKE_ONPLAYMENU( wps_onplay_menu, ID2P(LANG_ONPLAY_MENU_TITLE),
           onplaymenu_callback, Icon_Audio,
           &sound_settings, &wps_playlist_menu, &cat_playlist_menu,
           &goto_demo,
#ifdef HAVE_TAGCACHE
           &rating_item,
#endif
           
--- End code ---

Everything compiles fine and the option is added to the context menu but whenever I select the item audio stops (like i wanted it too), but then everything just freezes. So I'm not sure if the audio is actually stopping because I told it too or because of the freeze. This makes me think that there is something wrong with the function, but I can't find anything.

LinusN:
Interesting. What is this api-> pointer? There is no such thing in the current Rockbox source.

I tried your code in the simulator, and it worked perfectly (after removing the api-> pointer usage).

What target platform do you use?

*edit* I have now run it on my H140 player as well without problems. Works perfectly.

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