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Support for Airspy: allow decimation by 64

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This commit is contained in:
f4exb 2015-09-11 08:43:59 +02:00
parent 6e24ed6c28
commit 0b7a8c8cdb
4 changed files with 160 additions and 8 deletions
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155
include-gpl/dsp/decimators.h
View File

@ -34,6 +34,8 @@ struct decimation_shifts
static const uint post16 = 0;
static const uint pre32 = 0;
static const uint post32 = 0;
static const uint pre64 = 0;
static const uint post64 = 0;
};
template<>
@ -50,6 +52,8 @@ struct decimation_shifts<16, 16>
static const uint post16 = 4;
static const uint pre32 = 0;
static const uint post32 = 5;
static const uint pre64 = 0;
static const uint post64 = 6;
};
template<>
@ -66,22 +70,26 @@ struct decimation_shifts<16, 12>
static const uint post16 = 0;
static const uint pre32 = 0;
static const uint post32 = 1;
static const uint pre64 = 0;
static const uint post64 = 2;
};
template<>
struct decimation_shifts<16, 8>
{
static const uint pre1 = 5;
static const uint pre2 = 4;
static const uint pre1 = 6;
static const uint pre2 = 5;
static const uint post2 = 0;
static const uint pre4 = 3;
static const uint pre4 = 4;
static const uint post4 = 0;
static const uint pre8 = 2;
static const uint pre8 = 3;
static const uint post8 = 0;
static const uint pre16 = 1;
static const uint pre16 = 2;
static const uint post16 = 0;
static const uint pre32 = 0;
static const uint pre32 = 1;
static const uint post32 = 0;
static const uint pre64 = 0;
static const uint post64 = 0;
};
template<typename T, uint SdrBits, uint InputBits>
@ -105,6 +113,9 @@ public:
void decimate32_inf(SampleVector::iterator* it, const T* buf, qint32 len);
void decimate32_sup(SampleVector::iterator* it, const T* buf, qint32 len);
void decimate32_cen(SampleVector::iterator* it, const T* buf, qint32 len);
void decimate64_inf(SampleVector::iterator* it, const T* buf, qint32 len);
void decimate64_sup(SampleVector::iterator* it, const T* buf, qint32 len);
void decimate64_cen(SampleVector::iterator* it, const T* buf, qint32 len);
private:
IntHalfbandFilter m_decimator2; // 1st stages
@ -112,6 +123,7 @@ private:
IntHalfbandFilter m_decimator8; // 3rd stages
IntHalfbandFilter m_decimator16; // 4th stages
IntHalfbandFilter m_decimator32; // 5th stages
IntHalfbandFilter m_decimator64; // 6th stages
};
template<typename T, uint SdrBits, uint InputBits>
@ -352,6 +364,57 @@ void Decimators<T, SdrBits, InputBits>::decimate32_cen(SampleVector::iterator* i
}
}
template<typename T, uint SdrBits, uint InputBits>
void Decimators<T, SdrBits, InputBits>::decimate64_cen(SampleVector::iterator* it, const T* buf, qint32 len)
{
int pos = 0;
while (pos < len)
{
qint32 x0 = buf[pos+0] << decimation_shifts<SdrBits, InputBits>::pre64;
qint32 y0 = buf[pos+1] << decimation_shifts<SdrBits, InputBits>::pre64;
pos += 2;
if (m_decimator2.workDecimateCenter(&x0, &y0))
{
qint32 x1 = x0;
qint32 y1 = y0;
if (m_decimator4.workDecimateCenter(&x1, &y1))
{
qint32 x2 = x1;
qint32 y2 = y1;
if (m_decimator8.workDecimateCenter(&x2, &y2))
{
qint32 x3 = x2;
qint32 y3 = y2;
if (m_decimator16.workDecimateCenter(&x3, &y3))
{
qint32 x4 = x3;
qint32 y4 = y3;
if (m_decimator32.workDecimateCenter(&x4, &y4))
{
qint32 x5 = x4;
qint32 y5 = y4;
if (m_decimator64.workDecimateCenter(&x4, &y4))
{
(**it).setReal(x5 >> decimation_shifts<SdrBits, InputBits>::post64);
(**it).setImag(y5 >> decimation_shifts<SdrBits, InputBits>::post64);
++(*it);
}
}
}
}
}
}
}
}
template<typename T, uint SdrBits, uint InputBits>
void Decimators<T, SdrBits, InputBits>::decimate4_inf(SampleVector::iterator* it, const T* buf, qint32 len)
{
@ -556,4 +619,84 @@ void Decimators<T, SdrBits, InputBits>::decimate32_sup(SampleVector::iterator* i
}
}
template<typename T, uint SdrBits, uint InputBits>
void Decimators<T, SdrBits, InputBits>::decimate64_inf(SampleVector::iterator* it, const T* buf, qint32 len)
{
qint32 xreal[16], yimag[16];
for (int pos = 0; pos < len - 127; )
{
for (int i = 0; i < 16; i++)
{
xreal[i] = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]) << decimation_shifts<SdrBits, InputBits>::pre64;
yimag[i] = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]) << decimation_shifts<SdrBits, InputBits>::pre64;
pos += 16;
}
m_decimator2.myDecimate(xreal[0], yimag[0], &xreal[1], &yimag[1]);
m_decimator2.myDecimate(xreal[2], yimag[2], &xreal[3], &yimag[3]);
m_decimator2.myDecimate(xreal[4], yimag[4], &xreal[5], &yimag[3]);
m_decimator2.myDecimate(xreal[6], yimag[6], &xreal[7], &yimag[7]);
m_decimator2.myDecimate(xreal[8], yimag[8], &xreal[9], &yimag[9]);
m_decimator2.myDecimate(xreal[10], yimag[10], &xreal[11], &yimag[11]);
m_decimator2.myDecimate(xreal[12], yimag[12], &xreal[13], &yimag[13]);
m_decimator2.myDecimate(xreal[14], yimag[14], &xreal[15], &yimag[15]);
m_decimator4.myDecimate(xreal[1], yimag[1], &xreal[3], &yimag[3]);
m_decimator4.myDecimate(xreal[5], yimag[5], &xreal[7], &yimag[7]);
m_decimator4.myDecimate(xreal[9], yimag[9], &xreal[11], &yimag[11]);
m_decimator4.myDecimate(xreal[13], yimag[13], &xreal[15], &yimag[15]);
m_decimator8.myDecimate(xreal[3], yimag[3], &xreal[7], &yimag[7]);
m_decimator8.myDecimate(xreal[11], yimag[11], &xreal[15], &yimag[15]);
m_decimator16.myDecimate(xreal[7], yimag[7], &xreal[15], &yimag[15]);
(**it).setReal(xreal[15] >> decimation_shifts<SdrBits, InputBits>::post64);
(**it).setImag(yimag[15] >> decimation_shifts<SdrBits, InputBits>::post64);
++(*it);
}
}
template<typename T, uint SdrBits, uint InputBits>
void Decimators<T, SdrBits, InputBits>::decimate64_sup(SampleVector::iterator* it, const T* buf, qint32 len)
{
qint32 xreal[16], yimag[16];
for (int pos = 0; pos < len - 127; )
{
for (int i = 0; i < 16; i++)
{
xreal[i] = (buf[pos+1] - buf[pos+2] - buf[pos+5] + buf[pos+6]) << decimation_shifts<SdrBits, InputBits>::pre32;
yimag[i] = (buf[pos+4] + buf[pos+7] - buf[pos+0] - buf[pos+3]) << decimation_shifts<SdrBits, InputBits>::pre32;
pos += 16;
}
m_decimator2.myDecimate(xreal[0], yimag[0], &xreal[1], &yimag[1]);
m_decimator2.myDecimate(xreal[2], yimag[2], &xreal[3], &yimag[3]);
m_decimator2.myDecimate(xreal[4], yimag[4], &xreal[5], &yimag[3]);
m_decimator2.myDecimate(xreal[6], yimag[6], &xreal[7], &yimag[7]);
m_decimator2.myDecimate(xreal[8], yimag[8], &xreal[9], &yimag[9]);
m_decimator2.myDecimate(xreal[10], yimag[10], &xreal[11], &yimag[11]);
m_decimator2.myDecimate(xreal[12], yimag[12], &xreal[13], &yimag[13]);
m_decimator2.myDecimate(xreal[14], yimag[14], &xreal[15], &yimag[15]);
m_decimator4.myDecimate(xreal[1], yimag[1], &xreal[3], &yimag[3]);
m_decimator4.myDecimate(xreal[5], yimag[5], &xreal[7], &yimag[7]);
m_decimator4.myDecimate(xreal[9], yimag[9], &xreal[11], &yimag[11]);
m_decimator4.myDecimate(xreal[13], yimag[13], &xreal[15], &yimag[15]);
m_decimator8.myDecimate(xreal[3], yimag[3], &xreal[7], &yimag[7]);
m_decimator8.myDecimate(xreal[11], yimag[11], &xreal[15], &yimag[15]);
m_decimator16.myDecimate(xreal[7], yimag[7], &xreal[15], &yimag[15]);
(**it).setReal(xreal[15] >> decimation_shifts<SdrBits, InputBits>::post64);
(**it).setImag(yimag[15] >> decimation_shifts<SdrBits, InputBits>::post64);
++(*it);
}
}
#endif /* INCLUDE_GPL_DSP_DECIMATORS_H_ */

2
plugins/samplesource/airspy/airspygui.cpp
View File

@ -209,7 +209,7 @@ void AirspyGui::on_biasT_stateChanged(int state)
void AirspyGui::on_decim_valueChanged(int value)
{
if ((value <0) || (value > 5))
if ((value <0) || (value > 6))
return;
ui->decimText->setText(tr("%1").arg(1<<value));
m_settings.m_log2Decim = value;

2
plugins/samplesource/airspy/airspygui.ui
View File

@ -192,7 +192,7 @@
<item row="0" column="1">
<widget class="QSlider" name="decim">
<property name="maximum">
<number>5</number>
<number>6</number>
</property>
<property name="pageStep">
<number>1</number>

9
plugins/samplesource/airspy/airspythread.cpp
View File

@ -137,6 +137,9 @@ void AirspyThread::callback(const qint16* buf, qint32 len)
case 5:
m_decimators.decimate32_inf(&it, buf, len);
break;
case 6:
m_decimators.decimate64_inf(&it, buf, len);
break;
default:
break;
}
@ -160,6 +163,9 @@ void AirspyThread::callback(const qint16* buf, qint32 len)
case 5:
m_decimators.decimate32_sup(&it, buf, len);
break;
case 6:
m_decimators.decimate64_sup(&it, buf, len);
break;
default:
break;
}
@ -183,6 +189,9 @@ void AirspyThread::callback(const qint16* buf, qint32 len)
case 5:
m_decimators.decimate32_cen(&it, buf, len);
break;
case 6:
m_decimators.decimate64_cen(&it, buf, len);
break;
default:
break;
}