sdrangel/plugins/samplesource/filesource/filesourcesettings.cpp

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017 Edouard Griffiths, F4EXB                                   //
//                                                                               //
// 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                  //
//                                                                               //
// 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/>.          //
///////////////////////////////////////////////////////////////////////////////////

#include "util/simpleserializer.h"

#include "filesourcesettings.h"

const unsigned int FileSourceSettings::m_accelerationMaxScale = 2;

FileSourceSettings::FileSourceSettings()
{
    resetToDefaults();
}

void FileSourceSettings::resetToDefaults()
{
    m_centerFrequency = 435000000;
    m_sampleRate = 48000;
    m_fileName = "./test.sdriq";
    m_accelerationFactor = 1;
    m_loop = true;
}

QByteArray FileSourceSettings::serialize() const
{
    SimpleSerializer s(1);
    s.writeString(1, m_fileName);
    s.writeU32(2, m_accelerationFactor);
    s.writeBool(3, m_loop);
    return s.final();
}

bool FileSourceSettings::deserialize(const QByteArray& data)
{
    SimpleDeserializer d(data);

    if(!d.isValid()) {
        resetToDefaults();
        return false;
    }

    if(d.getVersion() == 1) {
        d.readString(1, &m_fileName, "./test.sdriq");
        d.readU32(2, &m_accelerationFactor, 1);
        d.readBool(3, &m_loop, true);
        return true;
    } else {
        resetToDefaults();
        return false;
    }
}

int FileSourceSettings::getAccelerationIndex(int accelerationValue)
{
    if (accelerationValue <= 1) {
        return 0;
    }

    int v = accelerationValue;
    int j = 0;

    for (int i = 0; i <= accelerationValue; i++)
    {
        if (v < 20)
        {
            if (v < 2) {
                j = 0;
            } else if (v < 5) {
                j = 1;
            } else if (v < 10) {
                j = 2;
            } else {
                j = 3;
            }

            return 3*i + j;
        }

        v /= 10;
    }

    return 3*m_accelerationMaxScale + 3;
}

int FileSourceSettings::getAccelerationValue(int accelerationIndex)
{
    if (accelerationIndex <= 0) {
        return 1;
    }

    unsigned int v = accelerationIndex - 1;
    int m = pow(10.0, v/3 > m_accelerationMaxScale ? m_accelerationMaxScale : v/3);
    int x = 1;

    if (v % 3 == 0) {
        x = 2;
    } else if (v % 3 == 1) {
        x = 5;
    } else if (v % 3 == 2) {
        x = 10;
    }

    return x * m;
}