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Huffman frame packing

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This commit is contained in:
Jordan Sherer 2018-07-15 09:40:46 -04:00
parent 90ce372081
commit 2c73ccde9b
2 changed files with 26 additions and 1 deletions
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24
mainwindow.cpp
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@ -1071,8 +1071,32 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
auto frames = buildFT8MessageFrames("OH8STN:KN4CRD?");
qDebug() << frames.first() << Varicode::unpackDirectedMessage(frames.first());
qDebug() << Varicode::packGrid("EM73tu") << Varicode::unpackGrid(Varicode::packGrid("EM73tu"));
auto allbits = Varicode::huffEncode(QString("When simple things need instructions, it is a certain sign of poor design.\x04").toUpper());
qDebug() << "FTFrames" << qCeil((allbits.length()+(6+6+1))/13.0);
int lasti = 0;
int i = 0;
int frames = 0;
QVector<bool> nextFrame;
foreach(auto bits, allbits){
if(nextFrame.length() + bits.length() > (frames == 0 ? (8-3) : 64)){
// emit frame
qDebug() << "frame ready at" << i << "chars" << i-lasti << "size" << nextFrame.length() << "->" << Varicode::bitsToStr(nextFrame);
nextFrame.clear();
lasti = i;
frames++;
}
nextFrame += bits;
i++;
}
qDebug() << "frame ready at" << i << "size" << nextFrame.length() << "->" << Varicode::bitsToStr(nextFrame);
frames++;
qDebug() << "HuffFrames" << frames;
#endif
// this must be the last statement of constructor
if (!m_valid) throw std::runtime_error {"Fatal initialization exception"};
}

3
varicode.cpp
View File

@ -489,7 +489,7 @@ QString Varicode::packDirectedMessage(const QString &text, int *n){
quint8 packed_cmd = directed_cmds.indexOf(cmd.at(0));
quint8 packed_extra = fromCRC;
// 3 + 28 + 28 + 5 = 64
// [3][28][28][5],[5] = 69
auto bits = (
Varicode::intToBits(packed_flag, 3) +
Varicode::intToBits(packed_from, 28) +
@ -509,6 +509,7 @@ QStringList Varicode::unpackDirectedMessage(const QString &text){
return unpacked;
}
// [3][28][28][5],[5] = 69
auto bits = Varicode::bitsToStr(Varicode::intToBits(Varicode::unpack64bits(text.left(12)), 64));
quint8 extra = Varicode::unpack5bits(text.right(1));