Summer of Code 2006		The work proposed to the Xiph.org Foundation has been accepted and successfully completed: Hardware implementation of Theora decoding. The initial propose was to implement one of the decoding modules in VHDL. On the final evaluation, three modules were completed. Useful links: Theora Hardware Wiki page www.theora.org SOC 2006 Proposal Source Code: http://svn.xiph.org/trunk/theora-fpga/

Hardware MP3 Decoder		It was an undergrad research project at University of Campinas. I worked together with a team of 6 people at the Computer Systems Laboratory. The MP3 Decoder algorithm was implemented in SystemC RTL, prototyped in FPGA and now manufactured in silicon Chip. See the Photos of the chip and the Video.  Article : Brazil design team joins IP silicon club http://www.eetimes.com/news/latest/ showArticle.jhtml?articleID=196602527

Artificial Life Research		Use of Evolutionary Algorithms and rigid-body physics simulation to evolve the morphology and Neural Network of 3D virtual creatures that can walk. Evolved Creatures (videos) Papper (portuguese) Source Code:  http://code.google.com/p/evomorph/

PortaOS		Monolithic preemptive operating system entirely programmed in x86 assembly with a reduced number of syscalls and optimized to run on embedded platforms. The system has been used to control a small robot. Source Code: portaos.tar.gz

RISC Processor		Small MIPS implementation designed in VHDL and prototyped in FPGA. Source Code: simple_mips.tar.gz

Wavelet Image Compression		I implemented this simple tool to compress images using the Wavelet Transform. Using a lossy compression algotithm it achieves the same image quality with the same compression ratio of the old JPEG algorithm (cossine transform). You will need the WAILI library. Source Code: wavecomp.tgz

Simple 3D Game		Programmed in C++ and OpenGL. Able to load Quake3 characters and height maps. Source Code: engine.tar.gz

MTerm		Linux shell console, like xterm, implemented in C and OpenGL to make animation effects on the rendered text. Source Code: mterm.tar.gz

RSA Cryptography		Implementation of the RSA cryptography algorithm in a simple pure C code and another using the GNU MP library. Source Code: simple_rsa.tar.gz mprsa.tar.gz (with GNU MP lib) Text explaining the RSA (portuguese)

Add_Suspect Linux Kernel Patch		Linux kernel patch to create a new system-call called "Add_Suspect". This syscall can label a process as a malicious suspect and decrease its priority. This is not very usefull, this patch was just to learn how the Linux sheduler works. Source Code: add_suspect.patch.bz2 How to install (portuguese) Article comparing the Linux 2.6 vs 2.4 scheduler (portuguese)

B+ Tree		B+ Tree implementation in C, the goal was to build a very simple file system. Source Code: ArvoreBmais.tar.gz ArvoreB.tar.gz

Quantum Computation		Undergrad presentation and article introducing Quantum Computation. Article (portuguese) Presentation (portuguese)

Introduction to SystemC		Presentation introducing the SystemC hardware language aula_systemc.pdf (portuguese)

3D Raycast on Mobile Phones		Implementation of the Raycast algorithm and a "First Person Shooting" game for mobile phones on the Brew platform. The pseudo-3D visual was entirely programmed in C and ARM assembly without any help libraries (without OpenGL). The Raycast technique was used in classic computer games like DOOM and Wolfenstein 3D. The game was developed to the Z80Multimedia company. See more screenshots.