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/* fix_fft.c - Fixed-point in-place Fast Fourier Transform */
/*
All data are fixed-point short integers, in which -32768
to +32768 represent -1.0 to +1.0 respectively. Integer
arithmetic is used for speed, instead of the more natural
floating-point.
For the forward FFT (time -> freq), fixed scaling is
performed to prevent arithmetic overflow, and to map a 0dB
sine/cosine wave (i.e. amplitude = 32767) to two -6dB freq
@lincank
lincank / pdfform.py
Created September 11, 2012 06:38
collect fillable form data from all pdf files in the input directory, and generate a "output.csv" file in the input directory
"""
collect fillable form data from all pdf files in the input directory,
and generate a "output.csv" file in the input directory
Dependency: pdfminer
Install: pip install pdfminer
Usage:
@dlivingstone
dlivingstone / DecoratorMain.cpp
Created June 27, 2012 19:43
Simple C++ Decorator Pattern example
// Simple decorator pattern example
// (c) Daniel Livingstone 2012
// CC-BY-SA
#include <string>
#include <iostream>
using namespace std;
class AbstractNPC {
public:
@masak
masak / explanation.md
Last active May 4, 2026 22:37
How is git commit sha1 formed

(The below text is licensed with CC0, which means that if you want to use or translate it, that is OK by me.)

Ok, I geeked out, and this is probably more information than you need. But it completely answers the question. Sorry. ☺

Locally, I'm at this commit:

$ git show
commit d6cd1e2bd19e03a81132a23b2025920577f84e37
Author: jnthn <jnthn@jnthn.net>

Date: Sun Apr 15 16:35:03 2012 +0200

@schlamar
schlamar / processify.py
Last active December 4, 2025 10:37
processify
import os
import sys
import traceback
from functools import wraps
from multiprocessing import Process, Queue
def processify(func):
'''Decorator to run a function as a process.
Be sure that every argument and the return value
@bradmontgomery
bradmontgomery / dummy-web-server.py
Last active April 14, 2026 18:30
a minimal http server in python. Responds to GET, HEAD, POST requests, but will fail on anything else.
#!/usr/bin/env python
"""
Very simple HTTP server in python (Updated for Python 3.7)
Usage:
./dummy-web-server.py -h
./dummy-web-server.py -l localhost -p 8000
Send a GET request:
@kyleturner
kyleturner / Remove Submodule
Created January 5, 2012 01:07
How to remove a submodule from a Github project
To remove a submodule you need to:
Delete the relevant line from the .gitmodules file.
Delete the relevant section from .git/config.
Run git rm --cached path_to_submodule (no trailing slash).
Commit and delete the now untracked submodule files.
@provegard
provegard / ssdp-test.py
Created December 5, 2011 21:52
Small SSDP server/client test in Python
#!/usr/bin/python
# Python program that can send out M-SEARCH messages using SSDP (in server
# mode), or listen for SSDP messages (in client mode).
import sys
from twisted.internet import reactor, task
from twisted.internet.protocol import DatagramProtocol
SSDP_ADDR = '239.255.255.250'
@rorydriscoll
rorydriscoll / Shader.glsl
Created November 26, 2011 00:14
Shader experiment
// bind gloss {label:"Gloss", default:0.5, max:1, step:0.01}
// bind cdiff {label:"Diffuse Colour", r:0.6, g:0.0, b:0.0}
// bind cspec {label:"Specular Colour", r:0.3, g:0.3, b:0.3}
// bind lightstrength {label:"Light Strength", default:3, max:100, step:0.1}
// bind envtop {label:"Environment Top", r:0.0, g:0.2, b:0.4}
// bind envmiddle {label:"Environment Middle", r:0.2, g:0.2, b:0.2}
// bind envbottom {label:"Environment Bottom", r:0.01, g:0.1, b:0.01}
// bind refractiveindex {label:"Refracive Index", default:1.5, max:3, step:0.1}
// bind normalmap {label:"Normal Map", default:false}
// bind diffuse {label:"Diffuse", default:true}
@davidm
davidm / meta-interpolate.lua
Created November 4, 2011 03:42
Lua metaprogramming using custom searcher with string interpolation example
--[[
The following example illustrates string interpolation [1]
by way of a preprocessor that runs as a customer searcher
function in package.loaders.
Tested in Lua 5.2.0-beta.
Depends on
file_slurp https://gist.github.com/1325400 (for loading files simply)
luabalanced https://github.com/davidm/lua-balanced (for Lua parsing)