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change the packets per sample calculation for 2-bit files.

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This is complicated and I botched it before.
Hopefully someone with access to 2-bit samples can test this
This commit is contained in:
Jim Melton 2021-08-24 15:03:48 -06:00
parent ecc339e68b
commit 06d1d2773b
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1 changed files with 10 additions and 3 deletions
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src/algorithms/signal_source/adapters/two_bit_packed_file_signal_source.cc
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@ -99,9 +99,16 @@ std::tuple<size_t, bool> TwoBitPackedFileSignalSource::itemTypeToSize()
return std::make_tuple(item_size, is_complex_t);
}
// Each sample is 2 bits; if the item_type() is char, then the size is 8/2 = 4 packets per sample
// If the item_type() is short, then the size is 16/2 = 8 packets per sample
double TwoBitPackedFileSignalSource::packetsPerSample() const { return item_size() / 2.0; }
// item_size() reports in bytes. Each sample is 2 bits, so the size is 8/2 = 4 packets per
// byte times the size of each item. A complex file has I and Q interleaved, so there are
// half as many (complex) samples as float
double TwoBitPackedFileSignalSource::packetsPerSample() const
{
auto packets = item_size() * 4.0;
if (is_complex()) packets /= 2;
return packets;
}
gnss_shared_ptr<gr::block> TwoBitPackedFileSignalSource::source() const { return char_to_float_; }
void TwoBitPackedFileSignalSource::create_file_source_hook()