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Fix division by 0 by clamping freq value a little higher, some minor style and whitespace changes

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23850 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2009-12-05 01:00:47 +00:00
parent f443d026ec
commit f76b5d5490
1 changed files with 11 additions and 12 deletions
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5
apps/plugins/pitch_detector.c
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@ -118,7 +118,7 @@ typedef struct _fixed fixed;
#define fp_data(x) ((x).a)
#define fp_frac(x) (fp_sub((x), int2fixed(fixed2int(x))))
#define FP_ZERO ((fixed){0})
#define FP_LOW ((fixed){1})
#define FP_LOW ((fixed){2})
/* Some defines for converting between period and frequency */
@ -758,10 +758,9 @@ void display_frequency (fixed freq)
nfreq = notes[note].freq;
while (fp_gt(fp_div(nfreq, freq), D_NOTE_SQRT))
nfreq = fp_shr(nfreq, 1);
while (fp_gt(fp_div(freq, nfreq), D_NOTE_SQRT))
{
nfreq = fp_shl(nfreq, 1);
}
ldf = fp_mul(int2fixed(1200), log(fp_div(freq,nfreq)));