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Added a decimation by 32 for BladeRF plugin

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This commit is contained in:
f4exb
2015-06-07 11:26:23 +02:00
parent 1c7ea3dfb3
commit 833890a1ea
4 changed files with 45 additions and 2 deletions
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plugins/samplesource/bladerf/bladerfthread.cpp
+42
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@@ -171,18 +171,57 @@ void BladerfThread::decimate16(SampleVector::iterator* it, const qint16* buf, qi
yimag[i] = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]) << 2; // was shift 4
pos += 8;
}
Sample s1( xreal[0], yimag[0] );
Sample s2( xreal[1], yimag[1] );
Sample s3( xreal[2], yimag[2] );
Sample s4( xreal[3], yimag[3] );
m_decimator2.myDecimate(&s1, &s2);
m_decimator2.myDecimate(&s3, &s4);
m_decimator4.myDecimate(&s2, &s4);
**it = s4;
(*it)++;
}
}
void BladerfThread::decimate32(SampleVector::iterator* it, const qint16* buf, qint32 len)
{
qint16 xreal[8], yimag[8];
for (int pos = 0; pos < len - 63; ) {
for (int i = 0; i < 8; i++) {
xreal[i] = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]) << 2; // was shift 4
yimag[i] = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]) << 2; // was shift 4
pos += 8;
}
Sample s1( xreal[0], yimag[0] );
Sample s2( xreal[1], yimag[1] );
Sample s3( xreal[2], yimag[2] );
Sample s4( xreal[3], yimag[3] );
Sample s5( xreal[4], yimag[4] );
Sample s6( xreal[5], yimag[5] );
Sample s7( xreal[6], yimag[6] );
Sample s8( xreal[7], yimag[7] );
m_decimator2.myDecimate(&s1, &s2);
m_decimator2.myDecimate(&s3, &s4);
m_decimator2.myDecimate(&s5, &s6);
m_decimator2.myDecimate(&s7, &s8);
m_decimator2.myDecimate(&s2, &s4);
m_decimator2.myDecimate(&s6, &s8);
m_decimator4.myDecimate(&s4, &s8);
**it = s8;
(*it)++;
}
}
// Decimate according to specified log2 (ex: log2=4 => decim=16)
void BladerfThread::callback(const qint16* buf, qint32 len)
{
@@ -205,6 +244,9 @@ void BladerfThread::callback(const qint16* buf, qint32 len)
case 4:
decimate16(&it, buf, len);
break;
case 5:
decimate32(&it, buf, len);
break;
default:
break;
}