c9b797cff4
The saving code has been refactored into one class per format with common methods for each part of the saving process. This should make it easier to add further formats, and inheriting a format class can allow implementing a different format that is largely based on an existing format. The loading code is also in one class per format but is largely the same as what it was before. Both classes have the ability to warn the user if any issues or errors are or will be encountered when loading or saving. TTI files are now written with CR/LF line endings on all platforms as a result of using binary file writing for all formats, previously Linux builds would save TTI files with just LF line endings. TTI files are still loaded with readLine() and trimmed() which can cope with either type of line ending. Experimental support for loading and exporting EP1 and HMS SD-Teletext htt formats has been added. The htt format inherits from the t42 format as the format appears to be largely the same except for the bits being reversed within each byte and the clock run-in and framing code added before each packet.
179 lines
6.1 KiB
C++
179 lines
6.1 KiB
C++
/*
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* Copyright (C) 2020-2025 Gavin MacGregor
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*
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* This file is part of QTeletextMaker.
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*
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* QTeletextMaker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* QTeletextMaker is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with QTeletextMaker. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef SAVEFORMATS_H
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#define SAVEFORMATS_H
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#include <QByteArray>
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#include <QDataStream>
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#include <QSaveFile>
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#include <QString>
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#include "document.h"
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#include "levelonepage.h"
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#include "pagebase.h"
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class SaveFormat
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{
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public:
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virtual ~SaveFormat() { };
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virtual void saveAllPages(QSaveFile &outFile, const TeletextDocument &document);
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virtual void saveCurrentSubPage(QSaveFile &outFile, const TeletextDocument &document);
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virtual QString description() const =0;
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virtual QStringList extensions() const =0;
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QString fileDialogFilter() const { return QString(description() + " (*." + extensions().join(" *.") + ')'); };
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virtual bool getWarnings(const PageBase &subPage) { return false; };
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QStringList warningStrings() const { return m_warnings; };
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QString errorString() const { return m_error; };
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protected:
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virtual void writeDocumentStart() { };
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virtual void writeAllPages();
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virtual void writeSubPage(const PageBase &subPage, int subPageNumber=0);
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virtual void writeSubPageStart(const PageBase &subPage, int subPageNumber=0) { };
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virtual void writeSubPageBody(const PageBase &subPage);
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virtual void writeSubPageEnd(const PageBase &subPage) { };
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virtual void writeDocumentEnd() { };
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virtual void writeX27Packets(const PageBase &subPage);
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virtual void writeX28Packets(const PageBase &subPage);
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virtual void writeX26Packets(const PageBase &subPage);
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virtual void writeX1to25Packets(const PageBase &subPage);
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virtual QByteArray format7BitPacket(QByteArray packet) { return packet; };
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virtual QByteArray format4BitPacket(QByteArray packet) { return packet; };
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virtual QByteArray format18BitPacket(QByteArray packet) { return packet; };
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virtual int writePacket(QByteArray packet, int packetNumber, int designationCode = -1);
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virtual int writeRawData(const char *s, int len);
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TeletextDocument const *m_document;
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QSaveFile *m_outFile;
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QDataStream m_outStream;
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QStringList m_warnings;
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QString m_error;
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};
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class SaveTTIFormat : public SaveFormat
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{
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public:
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QString description() const override { return QString("MRG Systems TTI"); };
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QStringList extensions() const override { return QStringList { "tti", "ttix" }; };
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protected:
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virtual void writeDocumentStart();
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virtual void writeSubPageStart(const PageBase &subPage, int subPageNumber=0);
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virtual void writeSubPageBody(const PageBase &subPage);
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virtual int writePacket(QByteArray packet, int packetNumber, int designationCode = -1);
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void writeString(const QString &command);
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QByteArray format7BitPacket(QByteArray packet);
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QByteArray format4BitPacket(QByteArray packet) { return format18BitPacket(packet); };
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QByteArray format18BitPacket(QByteArray packet);
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};
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class SaveM29Format : public SaveTTIFormat
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{
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protected:
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void writeSubPageStart(const PageBase &subPage, int subPageNumber=0);
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void writeSubPageBody(const PageBase &subPage);
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};
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class SaveT42Format : public SaveFormat
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{
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public:
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QString description() const override { return QString("t42 packet stream"); };
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QStringList extensions() const override { return QStringList { "t42" }; };
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protected:
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void writeSubPageStart(const PageBase &subPage, int subPageNumber=0);
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virtual int writePacket(QByteArray packet, int packetNumber, int designationCode = -1);
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virtual QByteArray format7BitPacket(QByteArray packet);
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virtual QByteArray format4BitPacket(QByteArray packet);
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virtual QByteArray format18BitPacket(QByteArray packet);
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int m_magazineNumber;
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};
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class SaveHTTFormat : public SaveT42Format
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{
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public:
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QString description() const override { return QString("HMS SD-Teletext HTT"); };
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QStringList extensions() const override { return QStringList { "htt" }; };
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protected:
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int writeRawData(const char *s, int len) override;
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};
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class SaveEP1Format : public SaveFormat
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{
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public:
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QString description() const override { return QString("Softel EP1"); };
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QStringList extensions() const override { return QStringList { "ep1" }; };
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virtual bool getWarnings(const PageBase &subPage);
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protected:
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void writeSubPageStart(const PageBase &subPage, int subPageNumber=0);
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void writeSubPageBody(const PageBase &subPage);
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void writeSubPageEnd(const PageBase &subPage);
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virtual void writeX1to25Packets(const PageBase &subPage);
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virtual QByteArray format18BitPacket(QByteArray packet);
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// Language codes unique to EP1
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// FIXME duplicated in loadformats.h
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const QMap<int, int> m_languageCode {
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{ 0x00, 0x09 }, { 0x01, 0x0d }, { 0x02, 0x18 }, { 0x03, 0x11 }, { 0x04, 0x0b }, { 0x05, 0x17 }, { 0x06, 0x07 },
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{ 0x08, 0x14 }, { 0x09, 0x0d }, { 0x0a, 0x18 }, { 0x0b, 0x11 }, { 0x0c, 0x0b }, { 0x0e, 0x07 },
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{ 0x10, 0x09 }, { 0x11, 0x0d }, { 0x12, 0x18 }, { 0x13, 0x11 }, { 0x14, 0x0b }, { 0x15, 0x17 }, { 0x16, 0x1c },
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{ 0x1d, 0x1e }, { 0x1f, 0x16 },
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{ 0x21, 0x0d }, { 0x22, 0xff }, { 0x23, 0xff }, { 0x26, 0x07 },
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{ 0x36, 0x1c }, { 0x37, 0x0e },
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{ 0x40, 0x09 }, { 0x44, 0x0b }
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};
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};
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class SaveFormats
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{
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public:
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SaveFormats();
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~SaveFormats();
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SaveFormat *findFormat(const QString &suffix) const;
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SaveFormat *findExportFormat(const QString &suffix) const;
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QString filters() const { return s_filters; };
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QString exportFilters() const { return s_exportFilters; };
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bool isExportOnly(const QString &suffix) const { return findFormat(suffix) == nullptr; };
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private:
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static const inline int s_size = 4;
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static const inline int s_nativeSize = 1;
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static int s_instances;
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inline static SaveFormat *s_fileFormat[s_size];
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inline static QString s_filters, s_exportFilters;
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};
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#endif
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