Old projects

• Compilation

  • (July 1996) Harissa is a Java Virtual Machine and a powerful Java native code compiler (by translating Java to C code). I wrote the first version of Harissa during my internship at the IRISA .
  • (Apr 1996, student project) A simple but almost complete C Compiler . It can compile itself.

• Lossless Data Compression

  • (May 1995) stat-1.0 : my efficient implementation of the PPM compression method.
  • (1989-1990) LZEXE my DOS EXEcutable file compressor with built-in transparent decompression.

• Numerical Algorithms

  • (Nov 12 2000) A tiny C program to print the biggest known prime number.
  • (1996-1997) world record for the computation of the individual binary digits of PI
  • (Jul 1995) A practical implementation of Pollard's FFT fast multiplication method. 10 million digits of Pi have been calculated with it. A survey (in French) of the multiplication method: transparent.ps The complete sources of the program (in ANSI C for UNIX): pi_salamin.tar.gz
  • (1995) A real time Mandelbrot fractal zoom on the Web and the sources .

• Real Time 3D

  • (May 26 1998) TinyGL: a Small, Free and Fast Subset of OpenGL.
  • (Jan 15 1998, student project) You can look at the VReng home page. VReng (Virtual Reality Engine) is a distributed 3D application allowing navigation in virtual worlds connected over the Internet using Multicast technology.
  • (mar 1996, student project) An interactive voxel viewer : you give to the program a file containing a scalar field defined by its values on a, say, 64x64x64 grid. Then, the program can let you turn around this field in real time, seeing it as a kind of smoke. The goal of this project was to represent seismic data.
  • (1994) You can try an old version of my linux 3D renderer. It uses the SVGAlib Graphic Library. It implements (mostly in assembler) the Z Buffer algorithm with gouraud shaded triangles, with a true analytic clipping.
  • (1992) ZGraph is an old pascal & assembler library I did for fast 3D rendering, even on a 286-based PC

• Linux

  • (Jan 10 1999)
    Proposal for a new internal structure for the Linux frame buffer drivers.

• Signal & Image processing

  • (May 6 1998) A patch for the mpg123 MPEG audio player to enable full speed layer 3 stereo playing at 44.1 kHz on 486DX Linux PCs.
  • (mar 1996, student project) I wrote a complete stereo vision package, with an interactive 3d display. You give two pictures of the same object to the program, and it builds a 3d representation of it. The C source code and the documentation (in French) are available here .
  • (1991) SoundDriver is a DOS example of one of my attempts to play digitized sounds & amiga modules.

• Telecommunications

  • (mar 1997, student project) Bibliographic study, implementation, optimization and simulation of the soft decoding of some linear error correcting codes (ECC). This study was especially focused on the soft decoding of the parity extended BCH(32,31) code used by the ERMES paging standard. An original point was to show how to soft-decode random linear ECCs. This study was initiated by JC Belfiore . You can get the postscript report in French. The source code of the generic simulation engine is available uppon request.
  • (Nov 1999) Linmodem: the Linux Soft Modem Project. This project intends to provide an open source modem which will be able to drive all the so called "winmodems".

• Electronics

  • (Jul 1995, student project) A two-week first year project: conception & realization with Sylvain Delas of a general purpose 8 bit microprocessor on a programmable Xilinx device. The complete diagrams and specifications are given. We also realized developpement tools (macro-assembler, debugger) and some funny programs.
  • (Aug 1991) A $10 video digitalization card for a PC... The quality of the image is not perfect :)
  • (1995) I have taken part in the realization of a robot to represent the Ecole Polytechnique in a competition organized in 1995 by the M6 French TV channel. I conceived & realized an ultrasonic subsystem to localize other robots and a part of the robot software.