CableDeliverySystemDescriptor.h

#pragma once
#include "DVBDescriptor.h"
#include "Transponder.h"
#include "Util.h"
extern "C" {
#include <linux/dvb/frontend.h>
}

class CableDeliverySystemDescriptor:public DVBDescriptor {
public:
	CableDeliverySystemDescriptor(DVBDescriptor *d):DVBDescriptor() {
		_tag = d->tag();
		_length = d->length();
		_data = d->data();
		delete d;
	}
	uint32_t frequency() const {
		return	(((_data[0]&0b11110000)>>4)*10000000 +
			 ((_data[0]&0b1111))       *1000000  +
			 ((_data[1]&0b11110000)>>4)*100000   +
			 ((_data[1]&0b1111))       *10000    +
			 ((_data[2]&0b11110000)>>4)*1000     +
			 ((_data[2]&0b1111))       *100      +
			 ((_data[3]&0b11110000)>>4)*10       +
			 ((_data[3]&0b1111))) * 100;
	}
	uint32_t symbolRate() const {
		return	(((_data[7]& 0b11110000)>>4) *1000000 +
			 ((_data[7]& 0b1111))        *100000  +
			 ((_data[8]& 0b11110000)>>4) *10000   +
			 ((_data[8]& 0b1111))        *1000    +
			 ((_data[9]& 0b11110000)>>4) *100     +
			 ((_data[9]& 0b1111))        *10      +
			 ((_data[10]&0b11110000)>>4)) * 100;
	}
	fe_code_rate fec() const {
		switch(_data[10]&0xf) {
		case 1:
			return FEC_1_2;
		case 2:
			return FEC_2_3;
		case 3:
			return FEC_3_4;
		case 4:
			return FEC_5_6;
		case 5:
			return FEC_7_8;
		case 6:
			return FEC_8_9;
		case 7:
			return FEC_3_5;
		case 8:
			return FEC_4_5;
		case 9:
			return FEC_9_10;
		case 15:
			return FEC_NONE;
		default:
			return FEC_AUTO; // If we're "reserved for future use", the driver might know better...
		}
	}
	fe_modulation modulation() const {
		switch(_data[6]) {
		case 1:
			return QAM_16;
		case 2:
			return QAM_32;
		case 3:
			return QAM_64;
		case 4:
			return QAM_128;
		case 5:
			return QAM_256;
		default:
			return QAM_AUTO; // If we're "reserved for future use", the driver might know better...
		}
	}
	DVBCTransponder *transponder() const {
		return new DVBCTransponder(frequency(), symbolRate(), modulation(), fec());
	}
	void dump(std::ostream &where=std::cerr, std::string const &indent="") const override {
		where << indent << "Cable transponder:" << std::endl
			<< indent << "\t" << "Frequency: " << frequency() << std::endl
			<< indent << "\t" << "FEC: " << static_cast<int>(fec()) << " was " << static_cast<int>(_data[10]&0xf) << std::endl
			<< indent << "\t" << "Modulation: " << static_cast<int>(modulation()) << std::endl
			<< indent << "\t" << "Symbol rate: " << symbolRate() << std::endl;
	}
};