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Merge branch 'stefanlinden-next' into next

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Carles Fernandez 2022-02-09 20:56:00 +01:00
commit 8bc379718f
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2 changed files with 15 additions and 8 deletions
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8
src/algorithms/signal_source/gnuradio_blocks/fifo_reader.cc
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@ -64,9 +64,14 @@ int FifoReader::work(int noutput_items,
// ishort == int16_t // ishort == int16_t
items_retrieved = read_interleaved<int16_t>(noutput_items, output_items); items_retrieved = read_interleaved<int16_t>(noutput_items, output_items);
} }
else if (sample_type_ == "ibyte") // Does this also work with cbyte?
{
// ibyte == int8_t
items_retrieved = read_interleaved<int8_t>(noutput_items, output_items);
}
else if (sample_type_ == "gr_complex") else if (sample_type_ == "gr_complex")
{ {
LOG(WARNING) << sample_type_ << " is not yet tested. Please consider removing this warning if tested successfully"; // gr_complex == complex<float>
items_retrieved = read_gr_complex(noutput_items, output_items); items_retrieved = read_gr_complex(noutput_items, output_items);
} }
else else
@ -80,6 +85,7 @@ int FifoReader::work(int noutput_items,
return this->WORK_CALLED_PRODUCE; return this->WORK_CALLED_PRODUCE;
} }
// read gr_complex items from fifo // read gr_complex items from fifo
// this fct has duplicate code with the templated read_interleaved fct in header // this fct has duplicate code with the templated read_interleaved fct in header
size_t FifoReader::read_gr_complex(int noutput_items, gr_vector_void_star &output_items) size_t FifoReader::read_gr_complex(int noutput_items, gr_vector_void_star &output_items)

15
src/algorithms/signal_source/gnuradio_blocks/fifo_reader.h
View File

@ -51,8 +51,11 @@ private:
FifoReader(const std::string &file_name, const std::string &sample_type); FifoReader(const std::string &file_name, const std::string &sample_type);
size_t read_gr_complex(int noutput_items, gr_vector_void_star &output_items); size_t read_gr_complex(int noutput_items, gr_vector_void_star &output_items);
//! function to read data out of FIFO which is stored as interleaved I/Q stream. //! function to read data out of FIFO which is stored as interleaved I/Q stream.
//! template argument determines sample_type //! template argument determines sample_type
// Note: template definition necessary in header file
// See also: https://stackoverflow.com/questions/495021/why-can-templates-only-be-implemented-in-the-header-file
template <typename Type> template <typename Type>
size_t read_interleaved(int noutput_items, gr_vector_void_star &output_items) size_t read_interleaved(int noutput_items, gr_vector_void_star &output_items)
{ {
@ -61,15 +64,13 @@ private:
{ {
// TODO: try if performance increases if we copy larger chunks to vector. // TODO: try if performance increases if we copy larger chunks to vector.
// how to read from stream: https://en.cppreference.com/w/cpp/io/basic_ifstream // how to read from stream: https://en.cppreference.com/w/cpp/io/basic_ifstream
std::array<char, 4> buffer; // gr_complex is 32bit = 4*char std::array<char, 2 * sizeof(Type)> buffer;
fifo_.read(reinterpret_cast<char *>(&buffer[0]), buffer.size()); fifo_.read(reinterpret_cast<char *>(buffer.data()), buffer.size());
if (fifo_.good()) if (fifo_.good())
{ {
Type real; auto real = reinterpret_cast<Type const *>(&buffer[0]);
Type imag; auto imag = reinterpret_cast<Type const *>(&buffer[sizeof(Type)]);
memcpy(&real, &buffer[0], sizeof(real)); static_cast<gr_complex *>(output_items[0])[n] = gr_complex(*real, *imag);
memcpy(&imag, &buffer[2], sizeof(imag));
static_cast<gr_complex *>(output_items.at(0))[n] = gr_complex(real, imag);
items_retrieved++; items_retrieved++;
} }
else if (fifo_.eof()) else if (fifo_.eof())