shiner-chen

shiner-chen / create_rootfs.sh

Created March 25, 2022 08:45 — forked from fjkz/create_rootfs.sh

Create a rootfs environment for chroot building.

	#!/bin/sh
	#
	# Create a rootfs environment for chroot building.
	#
	# Requires
	# - OS installing CDROM at the current directory,
	# - the root authority.
	#

	# mount install cd

shiner-chen / fix_fft.c

Created September 3, 2019 08:06 — forked from Tomwi/fix_fft.c

	/* 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