mirror of https://github.com/JakubMelka/PDF4QT.git
541 lines
23 KiB
C++
541 lines
23 KiB
C++
// Copyright (C) 2019-2020 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// PdfForQt 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#include "pdfmultimedia.h"
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#include "pdfdocument.h"
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namespace pdf
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{
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PDFSound PDFSound::parse(const PDFDocument* document, PDFObject object)
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{
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PDFSound result;
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object = document->getObject(object);
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if (object.isStream())
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{
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const PDFStream* stream = object.getStream();
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const PDFDictionary* dictionary = stream->getDictionary();
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constexpr const std::array<std::pair<const char*, Format>, 4> formats = {
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std::pair<const char*, Format>{ "Raw", Format::Raw },
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std::pair<const char*, Format>{ "Signed", Format::Signed },
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std::pair<const char*, Format>{ "muLaw", Format::muLaw },
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std::pair<const char*, Format>{ "ALaw", Format::ALaw }
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};
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// Jakub Melka: parse the sound without exceptions
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PDFDocumentDataLoaderDecorator loader(document);
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result.m_fileSpecification = PDFFileSpecification::parse(document, dictionary->get("F"));
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result.m_samplingRate = loader.readNumberFromDictionary(dictionary, "R", 0.0);
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result.m_channels = loader.readIntegerFromDictionary(dictionary, "C", 1);
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result.m_bitsPerSample = loader.readIntegerFromDictionary(dictionary, "B", 8);
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result.m_format = loader.readEnumByName(dictionary->get("E"), formats.cbegin(), formats.cend(), Format::Raw);
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result.m_soundCompression = loader.readNameFromDictionary(dictionary, "CO");
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result.m_soundCompressionParameters = document->getObject(dictionary->get("CP"));
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result.m_streamObject = object;
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}
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return result;
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}
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PDFRendition PDFRendition::parse(const PDFDocument* document, PDFObject object)
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{
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PDFRendition result;
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object = document->getObject(object);
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const PDFDictionary* renditionDictionary = nullptr;
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if (object.isDictionary())
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{
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renditionDictionary = object.getDictionary();
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}
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else if (object.isStream())
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{
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renditionDictionary = object.getStream()->getDictionary();
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}
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if (renditionDictionary)
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{
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constexpr const std::array<std::pair<const char*, Type>, 2> types = {
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std::pair<const char*, Type>{ "MR", Type::Media },
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std::pair<const char*, Type>{ "SR", Type::Selector }
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};
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PDFDocumentDataLoaderDecorator loader(document);
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result.m_type = loader.readEnumByName(renditionDictionary->get("S"), types.cbegin(), types.cend(), Type::Invalid);
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result.m_name = loader.readTextStringFromDictionary(renditionDictionary, "N", QString());
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auto readMediaCriteria = [renditionDictionary, document](const char* entry)
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{
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PDFObject dictionaryObject = document->getObject(renditionDictionary->get(entry));
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if (dictionaryObject.isDictionary())
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{
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const PDFDictionary* dictionary = dictionaryObject.getDictionary();
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return PDFMediaCriteria::parse(document, dictionary->get("C"));
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}
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return PDFMediaCriteria();
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};
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result.m_mustHonored = readMediaCriteria("MH");
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result.m_bestEffort = readMediaCriteria("BE");
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switch (result.m_type)
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{
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case Type::Media:
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{
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MediaRenditionData data;
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data.clip = PDFMediaClip::parse(document, renditionDictionary->get("C"));
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data.playParameters = PDFMediaPlayParameters::parse(document, renditionDictionary->get("P"));
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data.screenParameters = PDFMediaScreenParameters::parse(document, renditionDictionary->get("SP"));
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result.m_data = qMove(data);
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break;
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}
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case Type::Selector:
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{
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result.m_data = SelectorRenditionData{ renditionDictionary->get("R") };
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break;
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}
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default:
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break;
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}
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}
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return result;
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}
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PDFMediaMinimumBitDepth PDFMediaMinimumBitDepth::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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return PDFMediaMinimumBitDepth(loader.readIntegerFromDictionary(dictionary, "V", -1), loader.readIntegerFromDictionary(dictionary, "M", 0));
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}
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return PDFMediaMinimumBitDepth(-1, -1);
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}
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PDFMediaMinimumScreenSize PDFMediaMinimumScreenSize::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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std::vector<PDFInteger> values = loader.readIntegerArrayFromDictionary(dictionary, "V");
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if (values.size() == 2)
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{
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return PDFMediaMinimumScreenSize(values[0], values[1], loader.readIntegerFromDictionary(dictionary, "M", 0));
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}
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}
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return PDFMediaMinimumScreenSize(-1, -1, -1);
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}
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PDFMediaSoftwareIdentifier PDFMediaSoftwareIdentifier::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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return PDFMediaSoftwareIdentifier(loader.readTextStringFromDictionary(dictionary, "U", QString()).toLatin1(),
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loader.readIntegerArrayFromDictionary(dictionary, "L"),
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loader.readIntegerArrayFromDictionary(dictionary, "H"),
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loader.readBooleanFromDictionary(dictionary, "LI", true),
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loader.readBooleanFromDictionary(dictionary, "HI", true),
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loader.readStringArrayFromDictionary(dictionary, "OS"));
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}
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return PDFMediaSoftwareIdentifier(QByteArray(), { }, { }, true, true, { });
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}
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PDFMediaCriteria PDFMediaCriteria::parse(const PDFDocument* document, PDFObject object)
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{
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PDFMediaCriteria criteria;
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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auto readBoolean = [&loader, dictionary](const char* name, std::optional<bool>& value)
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{
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if (dictionary->hasKey(name))
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{
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value = loader.readBooleanFromDictionary(dictionary, name, false);
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}
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};
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readBoolean("A", criteria.m_audioDescriptions);
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readBoolean("C", criteria.m_textCaptions);
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readBoolean("O", criteria.m_audioOverdubs);
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readBoolean("S", criteria.m_subtitles);
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if (dictionary->hasKey("R"))
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{
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criteria.m_bitrate = loader.readIntegerFromDictionary(dictionary, "R", 0);
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}
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if (dictionary->hasKey("D"))
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{
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criteria.m_minimumBitDepth = PDFMediaMinimumBitDepth::parse(document, dictionary->get("D"));
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}
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if (dictionary->hasKey("Z"))
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{
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criteria.m_minimumScreenSize = PDFMediaMinimumScreenSize::parse(document, dictionary->get("Z"));
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}
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if (dictionary->hasKey("V"))
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{
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const PDFObject& viewerObject = document->getObject(dictionary->get("V"));
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if (viewerObject.isArray())
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{
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std::vector<PDFMediaSoftwareIdentifier> viewers;
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const PDFArray* viewersArray = viewerObject.getArray();
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viewers.reserve(viewersArray->getCount());
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for (size_t i = 0; i < viewersArray->getCount(); ++i)
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{
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viewers.emplace_back(PDFMediaSoftwareIdentifier::parse(document, viewersArray->getItem(i)));
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}
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criteria.m_viewers = qMove(viewers);
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}
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}
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std::vector<QByteArray> pdfVersions = loader.readNameArrayFromDictionary(dictionary, "P");
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if (pdfVersions.size() > 0)
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{
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criteria.m_minimumPdfVersion = qMove(pdfVersions[0]);
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if (pdfVersions.size() > 1)
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{
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criteria.m_maximumPdfVersion = qMove(pdfVersions[1]);
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}
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}
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if (dictionary->hasKey("L"))
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{
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criteria.m_languages = loader.readStringArrayFromDictionary(dictionary, "L");
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}
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}
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return criteria;
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}
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PDFMediaPermissions PDFMediaPermissions::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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constexpr const std::array<std::pair<const char*, Permission>, 4> types = {
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std::pair<const char*, Permission>{ "TEMPNEVER", Permission::Never },
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std::pair<const char*, Permission>{ "TEMPEXTRACT", Permission::Extract },
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std::pair<const char*, Permission>{ "TEMPACCESS", Permission::Access },
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std::pair<const char*, Permission>{ "TEMPALWAYS", Permission::Always }
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};
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return PDFMediaPermissions(loader.readEnumByName(dictionary->get("TF"), types.cbegin(), types.cend(), Permission::Never));
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}
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return PDFMediaPermissions(Permission::Never);
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}
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PDFMediaPlayers PDFMediaPlayers::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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auto readPlayers = [document, dictionary](const char* key)
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{
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std::vector<PDFMediaPlayer> result;
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const PDFObject& playersArrayObject = document->getObject(dictionary->get(key));
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if (playersArrayObject.isArray())
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{
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const PDFArray* playersArray = playersArrayObject.getArray();
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result.reserve(playersArray->getCount());
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for (size_t i = 0; i < playersArray->getCount(); ++i)
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{
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result.emplace_back(PDFMediaPlayer::parse(document, playersArray->getItem(i)));
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}
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}
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return result;
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};
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return PDFMediaPlayers(readPlayers("MU"), readPlayers("A"), readPlayers("NU"));
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}
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return PDFMediaPlayers({ }, { }, { });
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}
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PDFMediaPlayer PDFMediaPlayer::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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return PDFMediaPlayer(PDFMediaSoftwareIdentifier::parse(document, dictionary->get("PID")));
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}
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return PDFMediaPlayer(PDFMediaSoftwareIdentifier(QByteArray(), { }, { }, true, true, { }));
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}
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PDFMediaOffset PDFMediaOffset::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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QByteArray S = loader.readNameFromDictionary(dictionary, "S");
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if (S == "T")
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{
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if (const PDFDictionary* timespanDictionary = document->getDictionaryFromObject(dictionary->get("T")))
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{
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return PDFMediaOffset(Type::Time, TimeData{ loader.readIntegerFromDictionary(timespanDictionary, "V", 0) });
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}
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}
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else if (S == "F")
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{
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return PDFMediaOffset(Type::Frame, FrameData{ loader.readIntegerFromDictionary(dictionary, "F", 0) });
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}
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else if (S == "M")
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{
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return PDFMediaOffset(Type::Marker, MarkerData{ loader.readTextStringFromDictionary(dictionary, "M", QString()) });
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}
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}
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return PDFMediaOffset(Type::Invalid, std::monostate());
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}
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PDFMediaClip PDFMediaClip::parse(const PDFDocument* document, PDFObject object)
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{
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MediaClipData clipData;
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std::vector<MediaSectionData> sections;
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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std::set<PDFObjectReference> usedReferences;
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while (dictionary)
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{
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QByteArray type = loader.readNameFromDictionary(dictionary, "S");
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if (type == "MCD")
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{
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clipData.name = loader.readTextStringFromDictionary(dictionary, "N", QString());
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PDFObject fileSpecificationOrStreamObject = document->getObject(dictionary->get("D"));
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if (fileSpecificationOrStreamObject.isStream())
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{
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clipData.dataStream = fileSpecificationOrStreamObject;
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}
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else
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{
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clipData.fileSpecification = PDFFileSpecification::parse(document, fileSpecificationOrStreamObject);
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}
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clipData.contentType = loader.readStringFromDictionary(dictionary, "CT");
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clipData.permissions = PDFMediaPermissions::parse(document, dictionary->get("P"));
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clipData.alternateTextDescriptions = PDFMediaMultiLanguageTexts::parse(document, dictionary->get("Alt"));
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clipData.players = PDFMediaPlayers::parse(document, dictionary->get("PL"));
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auto getBaseUrl = [&loader, document, dictionary](const char* name)
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{
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if (const PDFDictionary* subdictionary = document->getDictionaryFromObject(dictionary->get(name)))
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{
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return loader.readStringFromDictionary(subdictionary, "BU");
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}
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return QByteArray();
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};
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clipData.m_baseUrlMustHonored = getBaseUrl("MH");
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clipData.m_baseUrlBestEffort = getBaseUrl("BE");
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break;
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}
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else if (type == "MCS")
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{
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MediaSectionData sectionData;
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sectionData.name = loader.readTextStringFromDictionary(dictionary, "N", QString());
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sectionData.alternateTextDescriptions = PDFMediaMultiLanguageTexts::parse(document, dictionary->get("Alt"));
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auto readMediaSectionBeginEnd = [document, dictionary](const char* name)
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{
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MediaSectionBeginEnd result;
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if (const PDFDictionary* subdictionary = document->getDictionaryFromObject(dictionary->get(name)))
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{
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result.offsetBegin = PDFMediaOffset::parse(document, subdictionary->get("B"));
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result.offsetEnd = PDFMediaOffset::parse(document, subdictionary->get("E"));
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}
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return result;
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};
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sectionData.m_mustHonored = readMediaSectionBeginEnd("MH");
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sectionData.m_bestEffort = readMediaSectionBeginEnd("BE");
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// Jakub Melka: parse next item in linked list
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PDFObject next = dictionary->get("D");
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if (next.isReference())
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{
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if (usedReferences.count(next.getReference()))
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{
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break;
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}
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usedReferences.insert(next.getReference());
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}
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dictionary = document->getDictionaryFromObject(next);
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continue;
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}
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dictionary = nullptr;
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}
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}
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return PDFMediaClip(qMove(clipData), qMove(sections));
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}
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PDFMediaMultiLanguageTexts PDFMediaMultiLanguageTexts::parse(const PDFDocument* document, PDFObject object)
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{
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PDFMediaMultiLanguageTexts texts;
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object = document->getObject(object);
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if (object.isArray())
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{
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const PDFArray* array = object.getArray();
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if (array->getCount() % 2 == 0)
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{
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PDFDocumentDataLoaderDecorator loader(document);
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const size_t pairs = array->getCount() / 2;
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for (size_t i = 0; i < pairs; ++i)
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{
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const PDFObject& languageName = document->getObject(array->getItem(2 * i));
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const PDFObject& text = array->getItem(2 * i + 1);
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if (languageName.isString())
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{
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texts.texts[languageName.getString()] = loader.readTextString(text, QString());
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}
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}
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}
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}
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return texts;
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}
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PDFMediaPlayParameters PDFMediaPlayParameters::parse(const PDFDocument* document, PDFObject object)
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{
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PDFMediaPlayParameters result;
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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result.m_players = PDFMediaPlayers::parse(document, dictionary->get("PL"));
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auto getPlayParameters = [document, dictionary](const char* name)
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{
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PlayParameters parameters;
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if (const PDFDictionary* subdictionary = document->getDictionaryFromObject(dictionary->get(name)))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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parameters.volume = loader.readIntegerFromDictionary(subdictionary, "V", 100);
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parameters.controllerUserInterface = loader.readBooleanFromDictionary(subdictionary, "C", false);
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parameters.fitMode = static_cast<FitMode>(loader.readIntegerFromDictionary(subdictionary, "F", 5));
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parameters.playAutomatically = loader.readBooleanFromDictionary(subdictionary, "A", true);
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parameters.repeat = loader.readNumberFromDictionary(dictionary, "RC", 1.0);
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if (const PDFDictionary* durationDictionary = document->getDictionaryFromObject(subdictionary->get("D")))
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{
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constexpr const std::array<std::pair<const char*, Duration>, 3> durations = {
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std::pair<const char*, Duration>{ "I", Duration::Intrinsic },
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std::pair<const char*, Duration>{ "F", Duration::Infinity },
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std::pair<const char*, Duration>{ "T", Duration::Seconds }
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};
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parameters.duration = loader.readEnumByName(durationDictionary->get("S"), durations.cbegin(), durations.cend(), Duration::Intrinsic);
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if (const PDFDictionary* timeDictionary = document->getDictionaryFromObject(durationDictionary->get("T")))
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{
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parameters.durationSeconds = loader.readNumberFromDictionary(timeDictionary, "V", 0.0);
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}
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}
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}
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return parameters;
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};
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result.m_mustHonored = getPlayParameters("MH");
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result.m_bestEffort = getPlayParameters("BE");
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}
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return result;
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}
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PDFMediaScreenParameters PDFMediaScreenParameters::parse(const PDFDocument* document, PDFObject object)
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{
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if (const PDFDictionary* dictionary = document->getDictionaryFromObject(object))
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{
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auto getScreenParameters = [document, dictionary](const char* name)
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{
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ScreenParameters result;
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if (const PDFDictionary* screenDictionary = document->getDictionaryFromObject(dictionary->get(name)))
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{
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PDFDocumentDataLoaderDecorator loader(document);
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result.windowType = static_cast<WindowType>(loader.readIntegerFromDictionary(screenDictionary, "W", 3));
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result.opacity = loader.readNumberFromDictionary(screenDictionary, "O", 1.0);
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result.monitorSpecification = loader.readIntegerFromDictionary(screenDictionary, "M", 0);
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std::vector<PDFReal> rgb = loader.readNumberArrayFromDictionary(screenDictionary, "B", { 1.0, 1.0, 1.0 });
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rgb.resize(3, 1.0);
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result.backgroundColor.setRgbF(rgb[0], rgb[1], rgb[2]);
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if (const PDFDictionary* floatWindowDictionary = document->getDictionaryFromObject(screenDictionary->get("F")))
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{
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std::vector<PDFInteger> sizeArray = loader.readIntegerArrayFromDictionary(floatWindowDictionary, "D");
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sizeArray.resize(2, 0);
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result.floatingWindowSize = QSize(sizeArray[0], sizeArray[1]);
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result.floatingWindowReference = static_cast<WindowRelativeTo>(loader.readIntegerFromDictionary(floatWindowDictionary, "RT", 0));
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|
result.floatingWindowOffscreenMode = static_cast<OffscreenMode>(loader.readIntegerFromDictionary(floatWindowDictionary, "O", 1));
|
|
result.floatingWindowHasTitleBar = loader.readBooleanFromDictionary(floatWindowDictionary, "T", true);
|
|
result.floatingWindowCloseable = loader.readBooleanFromDictionary(floatWindowDictionary, "UC", true);
|
|
result.floatingWindowResizeMode = static_cast<ResizeMode>(loader.readIntegerFromDictionary(floatWindowDictionary, "R", 0));
|
|
result.floatingWindowTitle = PDFMediaMultiLanguageTexts::parse(document, floatWindowDictionary->get("TT"));
|
|
switch (loader.readIntegerFromDictionary(floatWindowDictionary, "P", 4))
|
|
{
|
|
case 0:
|
|
result.floatingWindowAlignment = Qt::AlignTop | Qt::AlignLeft;
|
|
break;
|
|
case 1:
|
|
result.floatingWindowAlignment = Qt::AlignTop | Qt::AlignHCenter;
|
|
break;
|
|
case 2:
|
|
result.floatingWindowAlignment = Qt::AlignTop | Qt::AlignRight;
|
|
break;
|
|
case 3:
|
|
result.floatingWindowAlignment = Qt::AlignVCenter | Qt::AlignLeft;
|
|
break;
|
|
case 4:
|
|
default:
|
|
result.floatingWindowAlignment = Qt::AlignCenter;
|
|
break;
|
|
case 5:
|
|
result.floatingWindowAlignment = Qt::AlignVCenter | Qt::AlignRight;
|
|
break;
|
|
case 6:
|
|
result.floatingWindowAlignment = Qt::AlignBottom | Qt::AlignLeft;
|
|
break;
|
|
case 7:
|
|
result.floatingWindowAlignment = Qt::AlignBottom | Qt::AlignHCenter;
|
|
break;
|
|
case 8:
|
|
result.floatingWindowAlignment = Qt::AlignBottom | Qt::AlignRight;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
};
|
|
return PDFMediaScreenParameters(getScreenParameters("MH"), getScreenParameters("BE"));
|
|
}
|
|
|
|
return PDFMediaScreenParameters();
|
|
}
|
|
|
|
} // namespace pdf
|