From: drowe67 <drowe67@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Fri, 23 Nov 2012 04:11:00 +0000 (+0000)
Subject: headed off possible log10(0) issue in fdmdv_get_rx_spectrum
X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=c81971d756dc51f21c7dc8a9ccbb787bc0ee4ae4;p=freetel-svn-tracking.git

headed off possible log10(0) issue in fdmdv_get_rx_spectrum

git-svn-id: https://svn.code.sf.net/p/freetel/code@1047 01035d8c-6547-0410-b346-abe4f91aad63
---

diff --git a/codec2-dev/src/fdmdv.c b/codec2-dev/src/fdmdv.c
index ca60e5ba..a6204f41 100644
--- a/codec2-dev/src/fdmdv.c
+++ b/codec2-dev/src/fdmdv.c
@@ -1470,7 +1470,7 @@ void CODEC2_WIN32SUPPORT fdmdv_get_rx_spectrum(struct FDMDV *f, float mag_spec_d
     /* scale and convert to dB */
 
     for(i=0; i<FDMDV_NSPEC; i++) {
-	mag_spec_dB[i]  = 10.0*log10(fft_out[i].real*fft_out[i].real + fft_out[i].imag*fft_out[i].imag);
+	mag_spec_dB[i]  = 10.0*log10(fft_out[i].real*fft_out[i].real + fft_out[i].imag*fft_out[i].imag + 1E-12);
 	mag_spec_dB[i] -= full_scale_dB;
     }
 }