devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

FFT Plugin: Revamp the main code to rid it of 64-bit math. Use 32-bit kiss_fft_scalar because 16-bit integers are generally a poor choice for computation on-target. Simplify display code to speed it up. Add logarithmic frequency display (need keymappings, guessed on some). On dual-core, perform FFT on COP. Add some support function to fixedpoint.c. ... and stuff.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26470 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2010-06-02 08:34:10 +00:00
parent bbe6c5a5e2
commit 30e2f42c82
6 changed files with 999 additions and 788 deletions
Download patch file Download diff file Expand all files Collapse all files

3
apps/plugins/lib/fixedpoint.h
View file

@ -59,6 +59,9 @@ long fp_sqrt(long a, unsigned int fracbits);
long fp14_cos(int val);
long fp14_sin(int val);
long fp16_log(int x);
long fp16_exp(int x);
unsigned long isqrt(unsigned long x);
/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
* whichever is faster for the architecture) */