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fsk cleanup

This commit is contained in:
Kamal Mostafa 2011-06-04 14:41:41 -07:00
parent 08654e8466
commit 0e888d2bf2
1 changed files with 8 additions and 7 deletions
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15
src/fsk.c
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@ -201,8 +201,9 @@ debug_log("\t\tstop ");
#ifdef AVOID_TRANSIENTS #ifdef AVOID_TRANSIENTS
/* Compare strength of stop bit and start bit, to avoid detecting /* Compare strength of stop bit and start bit, to avoid detecting
* a transient as a start bit, as often results in a single false * a transient as a start bit, as often results in a single false
* character when the mark "leader" tone begins. */ * character when the mark "leader" tone begins. Require that the
if ( fabs( (sS - sM) - (pM - pS) ) > fabs(sS-sM) * AVOID_TRANSIENTS ) * diff between start bit and stop bit strength not be "large". */
if ( fabs((sS-sM)-(pM-pS)) > fabs(sS-sM) * AVOID_TRANSIENTS )
return 0.0; return 0.0;
#endif #endif
@ -378,7 +379,7 @@ main( int argc, char*argv[] )
float *read_bufptr = samples; float *read_bufptr = samples;
float confidence_total = 0; float confidence_total = 0;
unsigned int nbytes_decoded = 0; unsigned int nframes_decoded = 0;
int carrier = 0; int carrier = 0;
unsigned int noconfidence = 0; unsigned int noconfidence = 0;
@ -431,10 +432,10 @@ debug_log( "--------------------------\n");
if ( ++noconfidence > 3 ) // FIXME: explain if ( ++noconfidence > 3 ) // FIXME: explain
{ {
fprintf(stderr, "### NOCARRIER nbytes=%u confidence=%f ###\n", fprintf(stderr, "### NOCARRIER nbytes=%u confidence=%f ###\n",
nbytes_decoded, confidence_total / nbytes_decoded ); nframes_decoded, confidence_total / nframes_decoded );
carrier = 0; carrier = 0;
confidence_total = 0; confidence_total = 0;
nbytes_decoded = 0; nframes_decoded = 0;
} }
} }
@ -450,7 +451,7 @@ debug_log( "--------------------------\n");
carrier = 1; carrier = 1;
} }
confidence_total += confidence; confidence_total += confidence;
nbytes_decoded++; nframes_decoded++;
noconfidence = 0; noconfidence = 0;
/* Advance the sample stream forward past the decoded frame /* Advance the sample stream forward past the decoded frame
@ -488,7 +489,7 @@ debug_log( "--------------------------\n");
if ( carrier ) { if ( carrier ) {
fprintf(stderr, "### NOCARRIER nbytes=%u confidence=%f ###\n", fprintf(stderr, "### NOCARRIER nbytes=%u confidence=%f ###\n",
nbytes_decoded, confidence_total / nbytes_decoded ); nframes_decoded, confidence_total / nframes_decoded );
} }
simpleaudio_close(sa); simpleaudio_close(sa);