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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.

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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
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8
apps/plugins/fft/kiss_fft.c
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@ -18,10 +18,10 @@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
fixed or floating point complex numbers. It also delares the kf_ internal functions.
*/
static kiss_fft_cpx *scratchbuf=NULL;
static size_t nscratchbuf=0;
static kiss_fft_cpx *tmpbuf=NULL;
static size_t ntmpbuf=0;
static kiss_fft_cpx *scratchbuf SHAREDBSS_ATTR = NULL;
static size_t nscratchbuf SHAREDBSS_ATTR = 0;
static kiss_fft_cpx *tmpbuf SHAREDBSS_ATTR = NULL;
static size_t ntmpbuf SHAREDBSS_ATTR = 0;
#define CHECKBUF(buf,nbuf,n) \
do { \