Pure Data on Rockbox

This project is part of the Google Summer of Code 2009 project.

This is a Google Summer of Code 2009 project with the goal to make Rockbox a musical instrument. To do so, the sound processing framework Pure Data will be integrated into Rockbox in the likeness of http://www.ipodlinux.org/wiki/PdPod .

Those who do not know what Pure Data is are advised to look at the book "Designing Sound" (http://aspress.co.uk/ds/), both at the abridged text and at the sample chapters. Another good Pure Data tutorial can be found at http://www.pd-tutorial.com/ .

To test the abilities of PDBox get the file PureData.zip from http://www.ipodlinux.org/wiki/PdPod . If http://www.ipodlinux.org/ does not work, you might want to get this file from this page (seel below).

Project Plan

Part 1 (50%): Port PDa (Pure Data anywhere, the Pure Data fixed point fork) to Rockbox

• Port network communication: done (actually, it was replaced by a small custom message passing interface)
• Port memory allocator: done (using dbestfit library)
• Porting file-for-file, looking at missing symbols in the plug-in: done
• Port audio: done (output only)
• Port file operations: done
• Port scheduler: done

Part 2 (50%): Port PDPod GUI to Rockbox

• Sending statements to Pure Data core (pauses and un-pauses were used as an example): done
• Custom GUI: done
• Standard GUI: done

Known problems

• GUI does not take backdrops (bitmap backgrounds) into account, leading to an unreadable text/background combination -- PeterDHoye - 04 Aug 2009 - fixed
• PD designs which are based on audio files instead of (for lack of a better term) oscillators may have difficulties while loading - fixed
• Sound input capability is lacking

Preliminary information

• SourceForge.net project for Pure Data Anywhere: http://sourceforge.net/projects/pd-anywhere/
• Data transfer from the core to the output, networking code etc. is of special interest
• Tried to compile Pure Data Anywhere in Rockbox. Some files failed. File handling and networking mostly.
• Designing around memory allocator (looking if it is needed at all)
• Designed rudimentary event queue based networking code. While integrating the code it became evident that a memory allocator is needed. Therefore: Integrating dbestfit memory allocator
• Made an initial patch: FS#10214
• dbestfit seem to work with simple test. Of course, the most thorough test will be the plug-in itself
• Changed the patch to FS#10244
• Changed the patch to FS#10416
• PureData.zip: Archive of files for Pure Data with pdPod GUI

I	Attachment	Action	Size	Date	Who	Comment
zip	PureData.zip	manage	1788.6 K	12 Jul 2009 - 19:52	WincentBalin	Archive of files for Pure Data with pdPod GUI