Rockbox Development > Feature Ideas
What would you do with slow and limited TV out?
dreamlayers:
I've found one method for TV out on Video iPods, and I've submitted a preliminary patch. The method I'm using has several limitations:
* If an LCD update command happens while picture data is being output, there will be a few black lines in that field
* TV output stops for a bit while the image is changed
* This method is probably too slow for video
Would you want this in Rockbox, and how would you integrate it into Rockbox? I'm think it would only be useful for still image viewing and slideshows.
In case you're wondering about why the original firmware can do so much better: This code is uploading picture data and sending commands to the BCM (the DSP chip which handles the LCD and TV out). The original firmware runs programs on the BCM, and they do work such as H.264 and AAC-LC decoding or slideshows. I did not investigate how to do this. I believe the following is a directory listing of BCM firmware, created by someone else:
http://74.125.95.132/search?q=cache:bZy7xfpGS5UJ:fr.pastebin.ca/1232048
Chronon:
My 5g iPod is broken at the moment. But I could see using this functionality for slideshows/presentations. It would seem to make sense as a viewer plugin, though probably not the default one (i.e. select via context menu).
dreamlayers:
What about just having an option to use TV out in the JPEG viewer plugin?
Llorean:
What's the maximum framerate on it (possibly if you disable normal LCD updating while it's active, since apparently that causes graphical glitches?) and does it create much CPU overhead while active, or just bog down the broadcom chip itself?
Chronon:
--- Quote from: dreamlayers on January 19, 2009, 02:14:32 PM ---What about just having an option to use TV out in the JPEG viewer plugin?
--- End quote ---
Sure, that sounds fine too. I'll let others chime in since I can't really take advantage of this at the moment anyway.
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