leansdr::dvb_convol Struct Reference

#include <dvb.h>

Inheritance diagram for leansdr::dvb_convol:

Collaboration diagram for leansdr::dvb_convol:

Public Types
typedef u8	uncoded_byte
typedef u8	hardsymbol

Public Member Functions
	dvb_convol (scheduler *sch, pipebuf< uncoded_byte > &_in, pipebuf< hardsymbol > &_out, code_rate fec, int bits_per_symbol)
void	run ()
Public Member Functions inherited from leansdr::runnable
	runnable (scheduler *_sch, const char *name)
Public Member Functions inherited from leansdr::runnable_common
	runnable_common (const char *_name)
virtual	~runnable_common ()
virtual void	shutdown ()

Private Attributes
pipereader< uncoded_byte >	in
pipewriter< hardsymbol >	out
convol_multipoly< uint16_t, 16 >	convol

Additional Inherited Members
Public Attributes inherited from leansdr::runnable_common
const char *	name
Protected Attributes inherited from leansdr::runnable
scheduler *	sch

Detailed Description

Definition at line 666 of file dvb.h.

Member Typedef Documentation

hardsymbol

typedef u8 leansdr::dvb_convol::hardsymbol

Definition at line 669 of file dvb.h.

uncoded_byte

typedef u8 leansdr::dvb_convol::uncoded_byte

Definition at line 668 of file dvb.h.

Constructor & Destructor Documentation

dvb_convol()

leansdr::dvb_convol::dvb_convol ( scheduler *  sch, pipebuf< uncoded_byte > &  _in, pipebuf< hardsymbol > &  _out, code_rate  fec, int  bits_per_symbol  )

inline

Definition at line 671 of file dvb.h.

References leansdr::fail().

                                    : runnable(sch, "dvb_convol"),
                                      in(_in),
                                      out(_out, 64) // BPSK 7/8: 7 bytes in, 64 symbols out
    {
        fec_spec *fs = &fec_specs[fec];

        if (!fs->bits_in)
            fail("Unexpected FEC");

        convol.bits_in = fs->bits_in;
        convol.bits_out = fs->bits_out;
        convol.polys = fs->polys;
        convol.bps = bits_per_symbol;

        // FEC must output a whole number of IQ symbols
        if (convol.bits_out % convol.bps)
            fail("Code rate not suitable for this constellation");
    }

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Member Function Documentation

run()

void leansdr::dvb_convol::run ( )

inlinevirtual

Reimplemented from leansdr::runnable_common.

Definition at line 694 of file dvb.h.

References leansdr::deconvol_sync< Tbyte, BYTE_ERASED >::sync_t::in, leansdr::min(), and leansdr::deconvol_sync< Tbyte, BYTE_ERASED >::sync_t::out.

    {
        int count = min(in.readable(), out.writable() * convol.bps / convol.bits_out * convol.bits_in / 8);
        // Process in multiples of the puncturing period and of 8 bits.
        int chunk = convol.bits_in;
        count = (count / chunk) * chunk;
        convol.encode(in.rd(), out.wr(), count);
        in.read(count);
        int nout = count * 8 / convol.bits_in * convol.bits_out / convol.bps;
        out.written(nout);
    }

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Member Data Documentation

convol

convol_multipoly<uint16_t, 16> leansdr::dvb_convol::convol

private

Definition at line 709 of file dvb.h.

in

pipereader<uncoded_byte> leansdr::dvb_convol::in

private

Definition at line 707 of file dvb.h.

out

pipewriter<hardsymbol> leansdr::dvb_convol::out

private

Definition at line 708 of file dvb.h.

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The documentation for this struct was generated from the following file:

• plugins/channelrx/demoddatv/leansdr/dvb.h