diff options
Diffstat (limited to 'gst/spectrum')
| -rw-r--r-- | gst/spectrum/gstspectrum.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/gst/spectrum/gstspectrum.c b/gst/spectrum/gstspectrum.c index d9899b49..f2f654a6 100644 --- a/gst/spectrum/gstspectrum.c +++ b/gst/spectrum/gstspectrum.c @@ -517,10 +517,12 @@ process_s##width (GstSpectrum *spectrum, const gint##width *samples) \ \ /* Calculate magnitude in db */ \ for (i = 0; i < spectrum->bands; i++) { \ - gdouble val = (gdouble) freqdata[i].r * (gdouble) freqdata[i].r \ - + (gdouble) freqdata[i].i * (gdouble) freqdata[i].i; \ - val = sqrt (val); \ - val = 20.0 * log10 (val / max); \ + gdouble val; \ + val = (gdouble) freqdata[i].r * (gdouble) freqdata[i].r; \ + val += (gdouble) freqdata[i].i * (gdouble) freqdata[i].i; \ + val *= nfft; \ + val /= max*max; \ + val = 10.0 * log10 (val); \ if (val > spectrum->threshold) \ val -= spectrum->threshold; \ else \ @@ -583,9 +585,11 @@ process_f##width (GstSpectrum *spectrum, const g##type *samples) \ \ /* Calculate magnitude in db */ \ for (i = 0; i < spectrum->bands; i++) { \ - gdouble val = freqdata[i].r * freqdata[i].r + freqdata[i].i * freqdata[i].i; \ - val = sqrt (val); \ - val = 20.0 * log10 (val / nfft); \ + gdouble val; \ + val = freqdata[i].r * freqdata[i].r; \ + val += freqdata[i].i * freqdata[i].i; \ + val /= nfft; \ + val = 10.0 * log10 (val); \ if (val > spectrum->threshold) \ val -= spectrum->threshold; \ else \ |