mirror of https://github.com/f4exb/sdrangel.git
43 lines
2.6 KiB
C++
43 lines
2.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
|
|
// written by Christian Daniel //
|
|
// Copyright (C) 2015-2019 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef SDRBASE_DSP_HBFILTERCHAINCONVERTER_H
|
|
#define SDRBASE_DSP_HBFILTERCHAINCONVERTER_H
|
|
|
|
#include <vector>
|
|
#include "export.h"
|
|
|
|
class QString;
|
|
|
|
class SDRBASE_API HBFilterChainConverter
|
|
{
|
|
public:
|
|
// Converts the chain hash as a base3 number each digit representing a filter stage from lower (LSD) to upper level (MSD)
|
|
// The corresponding log2 of decimation or interpolation factor is also the number of filter stages
|
|
// A vector of indexes as base3 digits is filled in (0: low band, 1: center band, : high band)
|
|
// The shift factor of center frequency is returned. The actual shift is obtained by multiplying this factor by the sample rate.
|
|
static double convertToIndexes(unsigned int log2, unsigned int chainHash, std::vector<unsigned int>& chainIndexes);
|
|
// Same but used only for display giving a string representation of the filter chain
|
|
static double convertToString(unsigned int log2, unsigned int chainHash, QString& chainString);
|
|
// Just calculate the frequency shift factor relative to sample rate
|
|
static double getShiftFactor(unsigned int log2, unsigned int chainHash);
|
|
};
|
|
|
|
#endif // SDRBASE_DSP_HBFILTERCHAINCONVERTER_H
|