Simplyfying Rockbox for Sansa; How hard would this be?

[jacksoncougar]

In short I want to rewrite Rockbox so that:

it plays most common audio files

when you press the middle button of the sansa the player should play a randomly selected song from the "music" folder

another press skips ahead to another song.

A long press will pause the current song.

The scroll wheel will remain volume control.

The power button will become a quick 2 second on/off.

I want to know what the actual time and effort would be required to do this.

[AlexP]

What other formats do you need than those rockbox already plays?

To change the keymap, you need to edit the code then compile.  Set up a dev environment, then look at /apps/keymaps/your-target.c  It is pretty easy to edit the keymap, then compile and away you go.

[jacksoncougar]

No more formats really; mp3 audio will be almost all I ever use.

I wanted to know would it be easy to make it start-up and do nothing.

Then when the middle key is pressed it automatically plays a random song.

My LCD is broken so that should help you visualize my goal with this edit.

[cool_walking_]

I wanted to know would it be easy to make it start-up and do nothing.

Just don't enable the "resume playback on startup" setting.

You can alter your settings by editing .rockbox/config.cfg by hand.

[frause]

My LCD is broken so that should help you visualize my goal with this edit.

Have you tried the voice interface? A rockboxed sansa is actually very nice even without LCD.

[Febs]

You could accomplish almost everything that you want to do by making a playlist of your music folder and either shuffling the playlist or setting the "shuffle" setting to "all."  When you turn on the player, you could resume the playlist by pressing play, and then skip to a random song by pressing the >>| button.  

[jacksoncougar]

Thats currently how I have it set up. The reason I want to dedicate everything to the middle button is because my outer case was also damaged and I am planing on replacing it with a wooden shell. I had planned on removing the "play" ">>" "<<" and ":..?" buttons, keeping only the power button, the ring, and the middle button, all of which I will be re-facing with wood as well.

Before I went ahead with the actual physical modifications though I wanted to make sure I could set my sansa up as I wanted.

Also I forgot to mention but would I be able to make it play all music on a microSD card as well without any extra button presses needed? I've never used a microSD card so I am unsure.

Looking at the keymap source I have run into a quick problem; I want to be able to have it skip ahead a song with a quick press of the select button, but pause with a long press, and after reading somewhat through these forums I would also like to implement a double click to repeat last song.
So:
Quick press --> Next Song
Long Press --> Pause
Double Press --> Repeat Current

Can someone point me in the direction of how to achieve this? Also will putting Button_None like this:

Code: [Select]

{ ACTION_STD_PREV,        BUTTON_NONE,                 BUTTON_NONE },
{ ACTION_STD_PREVREPEAT,  BUTTON_NONE,						BUTTON_NONE },

Disable the function? (Make it inaccessible)

[kendubya]

One thing you could consider, if you don't mind throwing a little money at your problem, is searching on eBay for the terms "Sansa" and "As is".
I saw quite a few listings for Sansa e200s that had small defects, or functionality issues, that may provide the parts you need to repair your own player.  Some were going for $20 or less.

In any case, good luck!

[jacksoncougar]

Not interested in doing that; this is a hold-over until I but something else. Plus I figure this will take less time then the shipping would.