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Decimators simplification

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This commit is contained in:
f4exb 2018-05-11 00:48:37 +02:00
parent 7bf777e498
commit 50c868562a
1 changed files with 44 additions and 38 deletions
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82
sdrbase/dsp/decimators.h
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@ -638,6 +638,7 @@ void Decimators<StorageType, T, SdrBits, InputBits>::decimate4_sup(SampleVector:
}
}
// No filtering: bad for Rx OK for signal tracking
//template<typename StorageType, typename T, uint SdrBits, uint InputBits>
//void Decimators<StorageType, T, SdrBits, InputBits>::decimate4_inf(SampleVector::iterator* it, const T* buf, qint32 len)
//{
@ -655,6 +656,7 @@ void Decimators<StorageType, T, SdrBits, InputBits>::decimate4_sup(SampleVector:
// }
//}
// No filtering: bad for Rx OK for signal tracking
//template<typename StorageType, typename T, uint SdrBits, uint InputBits>
//void Decimators<StorageType, T, SdrBits, InputBits>::decimate4_sup(SampleVector::iterator* it, const T* buf, qint32 len)
//{
@ -2608,31 +2610,27 @@ void Decimators<StorageType, T, SdrBits, InputBits>::decimate64_sup(SampleVector
template<typename StorageType, typename T, uint SdrBits, uint InputBits>
void Decimators<StorageType, T, SdrBits, InputBits>::decimate2_cen(SampleVector::iterator* it, const T* buf, qint32 len)
{
StorageType xreal[2], yimag[2];
StorageType buf2[4];
for (int pos = 0; pos < len - 7; pos += 8)
{
xreal[0] = buf[pos+2] << decimation_shifts<SdrBits, InputBits>::pre2;
yimag[0] = buf[pos+3] << decimation_shifts<SdrBits, InputBits>::pre2;
xreal[1] = buf[pos+6] << decimation_shifts<SdrBits, InputBits>::pre2;
yimag[1] = buf[pos+7] << decimation_shifts<SdrBits, InputBits>::pre2;
m_decimator2.myDecimateCen(
buf[pos+0] << decimation_shifts<SdrBits, InputBits>::pre2,
buf[pos+1] << decimation_shifts<SdrBits, InputBits>::pre2,
&xreal[0],
&yimag[0],
buf[pos+2] << decimation_shifts<SdrBits, InputBits>::pre2,
buf[pos+3] << decimation_shifts<SdrBits, InputBits>::pre2,
buf[pos+4] << decimation_shifts<SdrBits, InputBits>::pre2,
buf[pos+5] << decimation_shifts<SdrBits, InputBits>::pre2,
&xreal[1],
&yimag[1]);
buf[pos+6] << decimation_shifts<SdrBits, InputBits>::pre2,
buf[pos+7] << decimation_shifts<SdrBits, InputBits>::pre2,
&buf2[0]);
(**it).setReal(xreal[0] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setImag(yimag[0] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setReal(buf2[0] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setImag(buf2[1] >> decimation_shifts<SdrBits, InputBits>::post2);
++(*it);
(**it).setReal(xreal[1] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setImag(yimag[1] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setReal(buf2[2] >> decimation_shifts<SdrBits, InputBits>::post2);
(**it).setImag(buf2[3] >> decimation_shifts<SdrBits, InputBits>::post2);
++(*it);
}
}
@ -2662,35 +2660,43 @@ void Decimators<StorageType, T, SdrBits, InputBits>::decimate2_cen(SampleVector:
template<typename StorageType, typename T, uint SdrBits, uint InputBits>
void Decimators<StorageType, T, SdrBits, InputBits>::decimate4_cen(SampleVector::iterator* it, const T* buf, qint32 len)
{
StorageType intbuf[4];
StorageType buf2[8], buf4[4];
for (int pos = 0; pos < len - 7; pos += 8)
for (int pos = 0; pos < len - 15; pos += 16)
{
intbuf[0] = buf[pos+2] << decimation_shifts<SdrBits, InputBits>::pre4;
intbuf[1] = buf[pos+3] << decimation_shifts<SdrBits, InputBits>::pre4;
intbuf[2] = buf[pos+6] << decimation_shifts<SdrBits, InputBits>::pre4;
intbuf[3] = buf[pos+7] << decimation_shifts<SdrBits, InputBits>::pre4;
m_decimator2.myDecimateCen(
buf[pos+0] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+1] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+2] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+3] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+4] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+5] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+6] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+7] << decimation_shifts<SdrBits, InputBits>::pre4,
&buf2[0]);
m_decimator2.myDecimate(
buf[pos+0] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+1] << decimation_shifts<SdrBits, InputBits>::pre4,
&intbuf[0],
&intbuf[1]);
m_decimator2.myDecimate(
buf[pos+4] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+5] << decimation_shifts<SdrBits, InputBits>::pre4,
&intbuf[2],
&intbuf[3]);
m_decimator2.myDecimateCen(
buf[pos+8] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+9] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+10] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+11] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+12] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+13] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+14] << decimation_shifts<SdrBits, InputBits>::pre4,
buf[pos+15] << decimation_shifts<SdrBits, InputBits>::pre4,
&buf2[4]);
m_decimator4.myDecimate(
intbuf[0],
intbuf[1],
&intbuf[2],
&intbuf[3]);
m_decimator4.myDecimateCen(
&buf2[0],
&buf4[0]);
(**it).setReal(intbuf[2] >> decimation_shifts<SdrBits, InputBits>::post4);
(**it).setImag(intbuf[3] >> decimation_shifts<SdrBits, InputBits>::post4);
++(*it);
(**it).setReal(buf4[0] >> decimation_shifts<SdrBits, InputBits>::post4);
(**it).setImag(buf4[1] >> decimation_shifts<SdrBits, InputBits>::post4);
++(*it);
(**it).setReal(buf4[2] >> decimation_shifts<SdrBits, InputBits>::post4);
(**it).setImag(buf4[3] >> decimation_shifts<SdrBits, InputBits>::post4);
++(*it);
}
}