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- added simple pattern matcher

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git-svn-id: http://moon:8086/svn/software/trunk/projects/GnuRadio@428 b431acfa-c32f-4a4a-93f1-934dc6c82436
This commit is contained in:
jens
2019-02-11 18:07:31 +00:00
parent 559bb77b34
commit 8c87efc10e
2 changed files with 97 additions and 61 deletions
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gr-jay/lib/bit_packer_impl.cc
+82 -49
View File
@@ -28,6 +28,12 @@
namespace gr {
namespace jay {
const uint8_t bit_packer_impl::m_pattern[2][18] =
{
{0x02, 0x7e, 0x02, 0x7e, 0x02, 0x7e, 0x02, 0x7e, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x7e, 0x7e, 0x7e},
{0x02, 0x7e, 0x02, 0x7e, 0x02, 0x7e, 0x02, 0x7e, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x7e, 0x02, 0x7e}
};
bit_packer::sptr
bit_packer::make(int numBitsIn, int numBitsOut, int endianess)
{
@@ -43,7 +49,6 @@ bit_packer_impl::bit_packer_impl(int numBitsIn, int numBitsOut, int endianess)
, gr::io_signature::make(1, 1, sizeof(int))
, gr::io_signature::make(1, 1, sizeof(int)))
, m_inputCounter(0)
, m_outputCounter(0)
, m_numBitsIn(numBitsIn)
, m_numBitsOut(numBitsOut)
, m_endianess(endianess)
@@ -80,63 +85,59 @@ bit_packer_impl::general_work (int noutput_items,
{
if (in[i] == 0xFF)
{
m_inputCounter = 0;
m_outputCounter = 0;
m_output = 0;
reset();
patternMatchReset();
continue;
}
else if (in[i] == 1)
{
m_gapCount++;
}
else if (in[i] == 0)
{
m_gapCount = 0;
}
if (m_gapCount >= 16)
{
reset();
patternMatchReset();
continue;
}
if (m_endianess == 0)
{
if(m_inputCounter == m_numBitsIn)
{
m_output <<= (m_numBitsOut - m_inputCounter);
out[j++] = m_output;
patternMatchProcess(m_output);
m_output = 0;
m_inputCounter = 0;
}
m_output <<= 1;
if (in[i] != 0)
{
m_output |= 1;
}
}
else
{
if (in[i] == 1)
if(m_inputCounter == m_numBitsIn)
{
m_gapCount++;
}
else
{
m_gapCount = 0;
}
if (m_gapCount >= 16)
{
m_inputCounter = 0;
m_outputCounter = 0;
m_output >>= (m_numBitsOut - m_inputCounter);
out[j++] = m_output;
patternMatchProcess(m_output);
m_output = 0;
continue;
m_inputCounter = 0;
}
if (m_endianess == 0)
m_output >>= 1;
if (in[i] != 0)
{
if(m_inputCounter == m_numBitsIn)
{
m_output <<= (m_numBitsOut - m_outputCounter);
out[j++] = m_output;
m_output = 0;
m_inputCounter = 0;
m_outputCounter = 0;
}
m_output <<= 1;
if (in[i] != 0)
{
m_output |= 1;
}
m_output |= 1 << (m_numBitsOut-1);
}
else
{
if(m_inputCounter == m_numBitsIn)
{
m_output >>= (m_numBitsOut - m_outputCounter);
out[j++] = m_output;
m_output = 0;
m_inputCounter = 0;
m_outputCounter = 0;
}
m_output >>= 1;
if (in[i] != 0)
{
m_output |= 1 << (m_numBitsOut-1);
}
}
m_inputCounter++;
m_outputCounter++;
}
m_inputCounter++;
}
// Tell runtime system how many input items we consumed on
@@ -147,6 +148,38 @@ bit_packer_impl::general_work (int noutput_items,
return j;
}
void bit_packer_impl::reset()
{
m_inputCounter = 0;
m_output = 0;
}
void bit_packer_impl::patternMatchProcess(uint8_t byte)
{
for (int i=0; i < sizeof(m_patternMatchCount)/sizeof(*m_patternMatchCount); i++)
{
int index = m_patternMatchCount[i];
if (m_pattern[i][index] != byte)
{
index = 0;
}
else
{
index++;
}
if (index == sizeof(m_pattern[i])/sizeof(m_pattern[i][0]))
{
fprintf(stderr, "Match %d\n", i);
index = 0;
}
m_patternMatchCount[i] = index;
}
}
void bit_packer_impl::patternMatchReset()
{
memset(m_patternMatchCount, 0, sizeof(m_patternMatchCount));
}
} /* namespace jay */
} /* namespace gr */