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MMDVM
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Remove union, use pointer tricks instead

This commit is contained in:
Geoffrey Merck 2020-05-08 15:06:08 +02:00
parent e7ff0d1898
commit f1a43ee520
2 changed files with 9 additions and 7 deletions
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8
FMDownsampler.cpp
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@ -23,10 +23,12 @@
CFMDownsampler::CFMDownsampler(uint16_t length) : CFMDownsampler::CFMDownsampler(uint16_t length) :
m_ringBuffer(length),//length might need tweaking m_ringBuffer(length),//length might need tweaking
m_samplePack(0),
m_samplePackBytes(0),
m_packIndex(0), m_packIndex(0),
m_downSampleIndex(0) m_downSampleIndex(0)
{ {
m_samplePack = 0; m_samplePackBytes = &m_samplePack;
} }
void CFMDownsampler::addSample(q15_t sample) void CFMDownsampler::addSample(q15_t sample)
@ -45,7 +47,7 @@ void CFMDownsampler::addSample(q15_t sample)
m_ringBuffer.put(m_samplePackBytes[2]); m_ringBuffer.put(m_samplePackBytes[2]);
m_ringBuffer.put(m_samplePackBytes[3]); m_ringBuffer.put(m_samplePackBytes[3]);
m_samplePack = 0; m_samplePack = 0;//reset the sample pack
} }
break; break;
default: default:
@ -53,7 +55,7 @@ void CFMDownsampler::addSample(q15_t sample)
break; break;
} }
m_packIndex++; m_packIndex++;
if(m_packIndex >= 2) if(m_packIndex >= 2)//did we pack to samples ?
m_packIndex = 0; m_packIndex = 0;
} }

6
FMDownsampler.h
View File

@ -32,10 +32,10 @@ public:
private: private:
CFMDownsampleRB m_ringBuffer; CFMDownsampleRB m_ringBuffer;
union {
int32_t m_samplePack; int32_t m_samplePack;
int8_t m_samplePackBytes[4]; int32_t *m_samplePackBytes;
};
uint8_t m_packIndex; uint8_t m_packIndex;
uint8_t m_downSampleIndex; uint8_t m_downSampleIndex;
}; };