leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE > Struct Template Reference

#include <dvbs2.h>

Inheritance diagram for leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >:

Collaboration diagram for leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >:

Public Member Functions
	s2_deinterleaver (scheduler *sch, pipebuf< plslot< SOFTSYMB >> &_in, pipebuf< fecframe< SOFTBYTE >> &_out)
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 ()

Static Private Member Functions
static void	deserialize_qpsk (plslot< SOFTSYMB > *pin, int nslots, SOFTBYTE *pout)
static void	deinterleave (int bps, int rows, const plslot< SOFTSYMB > *pin, int nslots, bool msb_first, SOFTBYTE *pout)
template<int MSB_FIRST, int BPS>
static void	deinterleave (int rows, const plslot< SOFTSYMB > *pin, int nslots, SOFTBYTE *pout)
static void	deinterleave4050 (const plslot< SOFTSYMB > *pin, int nslots, SOFTBYTE *pout)
static void	split_symbol (const llr_ss &ps, int bps, hard_sb accs[], int nacc, bool msb_first)
template<int MSB_FIRST, int BPS>
static void	split_symbol (const llr_ss &ps, hard_sb accs[], int nacc)
static void	split_symbol (const llr_ss &ps, int bps, llr_sb accs[], int nacc, bool msb_first)
template<int MSB_FIRST, int BPS>
static void	split_symbol (const llr_ss &ps, llr_sb accs[], int nacc)
static void	pack_qpsk_symbol (const llr_ss &ps, hard_sb *acc, int nacc)
static void	pack_qpsk_symbol (const llr_ss &ps, llr_sb *acc, int nacc)

Private Attributes
pipereader< plslot< SOFTSYMB > >	in
pipewriter< fecframe< SOFTBYTE > >	out

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

Detailed Description

template<typename SOFTSYMB, typename SOFTBYTE>
struct leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >

Definition at line 1559 of file dvbs2.h.

Constructor & Destructor Documentation

s2_deinterleaver()

template<typename SOFTSYMB, typename SOFTBYTE>

leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::s2_deinterleaver ( scheduler *  sch, pipebuf< plslot< SOFTSYMB >> &  _in, pipebuf< fecframe< SOFTBYTE >> &  _out  )

inline

Definition at line 1561 of file dvbs2.h.

        : runnable(sch, "S2 deinterleaver"),
          in(_in), out(_out)
    {
    }

Member Function Documentation

deinterleave() [1/2]

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::deinterleave ( int  bps, int  rows, const plslot< SOFTSYMB > *  pin, int  nslots, bool  msb_first, SOFTBYTE *  pout  )

inlinestaticprivate

Definition at line 1652 of file dvbs2.h.

References leansdr::fail().

    {
        void (*func)(int rows, const plslot<SOFTSYMB> *pin, int nslots,
                     SOFTBYTE *pout) = 0;
        if (msb_first)
            switch (bps)
            {
            case 2:
                func = deinterleave<1, 2>;
                break;
            case 3:
                func = deinterleave<1, 3>;
                break;
            case 4:
                func = deinterleave<1, 4>;
                break;
            case 5:
                func = deinterleave<1, 5>;
                break;
            default:
                fail("Bad bps");
            }
        else
            switch (bps)
            {
            case 2:
                func = deinterleave<0, 2>;
                break;
            case 3:
                func = deinterleave<0, 3>;
                break;
            case 4:
                func = deinterleave<0, 4>;
                break;
            case 5:
                func = deinterleave<0, 5>;
                break;
            default:
                fail("Bad bps");
            }
        (*func)(rows, pin, nslots, pout);
    }

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deinterleave() [2/2]

template<typename SOFTSYMB, typename SOFTBYTE>

template<int MSB_FIRST, int BPS>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::deinterleave ( int  rows, const plslot< SOFTSYMB > *  pin, int  nslots, SOFTBYTE *  pout  )

inlinestaticprivate

Definition at line 1698 of file dvbs2.h.

References leansdr::fail(), leansdr::fatal(), leansdr::plslot< SOFTSYMB >::LENGTH, leansdr::softword_clear(), and leansdr::plslot< SOFTSYMB >::symbols.

    {
        if (BPS == 4 && rows == 4050 && MSB_FIRST)
            return deinterleave4050(pin, nslots, pout);
        if (rows % 8)
            fatal("modcod/framesize combination not supported\n");
        int stride = rows / 8; // Offset to next column, in bytes
        SOFTBYTE accs[BPS];
        for (int b = 0; b < BPS; ++b)
            softword_clear(&accs[b]); // gcc warning
        int nacc = 0;
        for (; nslots; --nslots, ++pin)
        {
            const SOFTSYMB *ps = pin->symbols;
            for (int ns = pin->LENGTH; ns--; ++ps)
            {
                split_symbol(*ps, BPS, accs, nacc, MSB_FIRST);
                ++nacc;
                if (nacc == 8)
                { // TBD Unroll, same as interleave()
                    SOFTBYTE *po = pout;
                    // TBD Pass stride as template parameter.
                    for (int b = 0; b < BPS; ++b, po += stride)
                        *po = accs[b];
                    ++pout;
                    nacc = 0;
                }
            }
        }
        if (nacc)
            fail("Bug: s2_deinterleaver");
    }

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deinterleave4050()

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::deinterleave4050 ( const plslot< SOFTSYMB > *  pin, int  nslots, SOFTBYTE *  pout  )

inlinestaticprivate

Definition at line 1736 of file dvbs2.h.

References leansdr::fatal(), leansdr::plslot< SOFTSYMB >::LENGTH, leansdr::softword_clear(), leansdr::softword_get(), leansdr::softwords_set(), and leansdr::plslot< SOFTSYMB >::symbols.

    {
        const int rows = 4050;
        SOFTBYTE accs[4];
        for (int b = 0; b < 4; ++b)
            softword_clear(&accs[b]); // gcc warning
        int nacc = 0;
        for (; nslots; --nslots, ++pin)
        {
            const SOFTSYMB *ps = pin->symbols;
            for (int ns = pin->LENGTH; ns--; ++ps)
            {
                split_symbol(*ps, 4, accs, nacc, true);
                ++nacc;
                if (nacc == 8)
                {
                    for (int b = 0; b < 8; ++b)
                    {
                        softwords_set(pout, rows * 0 + b, softword_get(accs[0], b));
                        softwords_set(pout, rows * 1 + b, softword_get(accs[1], b));
                        softwords_set(pout, rows * 2 + b, softword_get(accs[2], b));
                        softwords_set(pout, rows * 3 + b, softword_get(accs[3], b));
                    }
                    ++pout;
                    nacc = 0;
                }
            }
        }
        if (nacc != 2)
            fatal("Bug: Expected 2 leftover rows\n");
        // Pad with random symbol so that we can use accs[].
        for (int b = nacc; b < 8; ++b)
            split_symbol(pin->symbols[0], 4, accs, b, true);
        for (int b = 0; b < nacc; ++b)
        {
            softwords_set(pout, rows * 0 + b, softword_get(accs[0], b));
            softwords_set(pout, rows * 1 + b, softword_get(accs[1], b));
            softwords_set(pout, rows * 2 + b, softword_get(accs[2], b));
            softwords_set(pout, rows * 3 + b, softword_get(accs[3], b));
        }
    }

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deserialize_qpsk()

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::deserialize_qpsk ( plslot< SOFTSYMB > *  pin, int  nslots, SOFTBYTE *  pout  )

inlinestaticprivate

Definition at line 1601 of file dvbs2.h.

References leansdr::fail(), leansdr::fatal(), leansdr::plslot< SOFTSYMB >::LENGTH, leansdr::softword_clear(), and leansdr::plslot< SOFTSYMB >::symbols.

    {
        SOFTBYTE acc;
        softword_clear(&acc); // gcc warning
        int nacc = 0;
        for (; nslots; --nslots, ++pin)
        {
            SOFTSYMB *ps = pin->symbols;
            for (int ns = pin->LENGTH; ns--; ++ps)
            {
                pack_qpsk_symbol(*ps, &acc, nacc);
                nacc += 2;
                if (nacc == 8)
                { // TBD unroll
                    *pout++ = acc;
                    nacc = 0;
                }
            }
        }
    }

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pack_qpsk_symbol() [1/2]

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::pack_qpsk_symbol ( const llr_ss &  ps, hard_sb *  acc, int  nacc  )

inlinestaticprivate

Definition at line 1847 of file dvbs2.h.

References leansdr::llr_ss::bits, and leansdr::llr_harden().

    {
        // TBD Must match LLR law, see softsymb_harden.
        uint8_t s = llr_harden(ps.bits[0]) | (llr_harden(ps.bits[1]) << 1);
        *acc = (*acc << 2) | s;
    }

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pack_qpsk_symbol() [2/2]

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::pack_qpsk_symbol ( const llr_ss &  ps, llr_sb *  acc, int  nacc  )

inlinestaticprivate

Definition at line 1856 of file dvbs2.h.

References leansdr::llr_sb::bits, and leansdr::llr_ss::bits.

    {
        acc->bits[nacc] = ps.bits[1];
        acc->bits[nacc + 1] = ps.bits[0];
    }

run()

template<typename SOFTSYMB, typename SOFTBYTE>

void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::run ( )

inlinevirtual

Reimplemented from leansdr::runnable_common.

Definition at line 1568 of file dvbs2.h.

References leansdr::fecframe< SOFTBYTE >::bytes, leansdr::check_modcod(), leansdr::fail(), leansdr::FEC35, leansdr::s2_pls::framebits(), leansdr::plslot< SOFTSYMB >::is_pls, leansdr::s2_pls::modcod, leansdr::modcod_info::nslots_nf, leansdr::modcod_info::nsymbols, leansdr::plslot< SOFTSYMB >::pls, leansdr::fecframe< SOFTBYTE >::pls, leansdr::modcod_info::rate, leansdr::pipereader< T >::rd(), leansdr::pipereader< T >::read(), leansdr::pipereader< T >::readable(), leansdr::s2_pls::sf, leansdr::pipewriter< T >::wr(), leansdr::pipewriter< T >::writable(), and leansdr::pipewriter< T >::written().

    {
        while (in.readable() >= 1 && out.writable() >= 1)
        {
            plslot<SOFTSYMB> *pin = in.rd();
            if (!pin->is_pls)
                fail("s2_deinterleaver: bad input sequence");
            s2_pls *pls = &pin->pls;
            const modcod_info *mcinfo = check_modcod(pls->modcod);
            int nslots = pls->sf ? mcinfo->nslots_nf / 4 : mcinfo->nslots_nf;
            if (in.readable() < 1 + nslots)
                return;
            fecframe<SOFTBYTE> *pout = out.wr();
            pout->pls = *pls;
            SOFTBYTE *pbytes = pout->bytes;
            if (mcinfo->nsymbols == 4)
                deserialize_qpsk(pin + 1, nslots, pbytes);
            else
            {
                int bps = log2(mcinfo->nsymbols);
                int rows = pls->framebits() / bps;
                if (mcinfo->nsymbols == 8 && mcinfo->rate == FEC35)
                    deinterleave(bps, rows, pin + 1, nslots, false, pbytes);
                else
                    deinterleave(bps, rows, pin + 1, nslots, true, pbytes);
            }
            in.read(1 + nslots);
            out.written(1);
        }
    }

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split_symbol() [1/4]

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::split_symbol ( const llr_ss &  ps, int  bps, hard_sb  accs[], int  nacc, bool  msb_first  )

inlinestaticprivate

Definition at line 1781 of file dvbs2.h.

References leansdr::llr_ss::bits, and leansdr::llr_harden().

    {
        if (msb_first)
        {
            for (int b = 0; b < bps; ++b)
                accs[b] = (accs[b] << 1) | llr_harden(ps.bits[bps - 1 - b]);
        }
        else
        {
            for (int b = 0; b < bps; ++b)
                accs[b] = (accs[b] << 1) | llr_harden(ps.bits[b]);
        }
    }

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split_symbol() [2/4]

template<typename SOFTSYMB, typename SOFTBYTE>

template<int MSB_FIRST, int BPS>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::split_symbol ( const llr_ss &  ps, hard_sb  accs[], int  nacc  )

inlinestaticprivate

Definition at line 1798 of file dvbs2.h.

References leansdr::llr_ss::bits, and leansdr::llr_harden().

    {
        if (MSB_FIRST)
        {
            for (int b = 0; b < BPS; ++b)
                accs[b] = (accs[b] << 1) | llr_harden(ps.bits[BPS - 1 - b]);
        }
        else
        {
            for (int b = 0; b < BPS; ++b)
                accs[b] = (accs[b] << 1) | llr_harden(ps.bits[b]);
        }
    }

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split_symbol() [3/4]

template<typename SOFTSYMB, typename SOFTBYTE>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::split_symbol ( const llr_ss &  ps, int  bps, llr_sb  accs[], int  nacc, bool  msb_first  )

inlinestaticprivate

Definition at line 1814 of file dvbs2.h.

References leansdr::llr_ss::bits.

    {
        if (msb_first)
        {
            for (int b = 0; b < bps; ++b)
                accs[b].bits[nacc] = ps.bits[bps - 1 - b];
        }
        else
        {
            for (int b = 0; b < bps; ++b)
                accs[b].bits[nacc] = ps.bits[b];
        }
    }

split_symbol() [4/4]

template<typename SOFTSYMB, typename SOFTBYTE>

template<int MSB_FIRST, int BPS>

static void leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::split_symbol ( const llr_ss &  ps, llr_sb  accs[], int  nacc  )

inlinestaticprivate

Definition at line 1831 of file dvbs2.h.

References leansdr::llr_ss::bits.

    {
        if (MSB_FIRST)
        {
            for (int b = 0; b < BPS; ++b)
                accs[b].bits[nacc] = ps.bits[BPS - 1 - b];
        }
        else
        {
            for (int b = 0; b < BPS; ++b)
                accs[b].bits[nacc] = ps.bits[b];
        }
    }

Member Data Documentation

in

template<typename SOFTSYMB, typename SOFTBYTE>

pipereader<plslot<SOFTSYMB> > leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::in

private

Definition at line 1863 of file dvbs2.h.

out

template<typename SOFTSYMB, typename SOFTBYTE>

pipewriter<fecframe<SOFTBYTE> > leansdr::s2_deinterleaver< SOFTSYMB, SOFTBYTE >::out

private

Definition at line 1864 of file dvbs2.h.

---

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

• plugins/channelrx/demoddatv/leansdr/dvbs2.h