added properties to control position of tags when writing files
This commit is contained in:
parent
6563a0c854
commit
e7bd2185d5
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@ -703,430 +703,497 @@ void MatroskaContainer::internalMakeFile()
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addNotification(NotificationType::Critical, "No EBML elements could be found.", context);
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throw InvalidDataException();
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}
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// prepare rewriting the file
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updateStatus("Preparing for rewriting Matroska/EBML file ...");
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fileInfo().close(); // ensure the file is close before renaming it
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string backupPath;
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fstream &outputStream = fileInfo().stream();
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BinaryWriter outputWriter(&outputStream);
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fstream backupStream; // create a stream to open the backup/original file
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// check whether a rewrite is required
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try {
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BackupHelper::createBackupFile(fileInfo().path(), backupPath, backupStream);
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// set backup stream as associated input stream since we need the original elements to write the new file
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setStream(backupStream);
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// recreate original file, define buffer variables
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outputStream.open(fileInfo().path(), ios_base::out | ios_base::binary | ios_base::trunc);
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// define needed variables
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uint64 elementSize; // the size of the current element
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uint64 clusterSize; // the new size the current cluster
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uint64 clusterReadOffset; // the read offset of the current cluster
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uint64 clusterReadSize; // the original size of the current cluster
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vector<uint64> clusterSizes; // the sizes of the cluster elements
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vector<uint64>::const_iterator clusterSizesIterator;
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uint64 readOffset = 0; // the current read offset to calculate positions
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uint64 currentOffset = 0; // the current write offset to calculate positions
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uint64 offset; // offset of the segment which is currently written, offset of "Cues"-element in segment
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bool cuesPresent; // whether the "Cues"-element is present in the current segment
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vector<tuple<uint64, uint64> > crc32Offsets; // holds the offsets of all CRC-32 elements and the length of the enclosing block
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bool elementHasCrc32; // whether the current segment has a CRC-32 element
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byte sizeLength; // size length used to make size denotations
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char buff[8]; // buffer used to make size denotations
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// calculate EBML header size
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updateStatus("Writing EBML header ...");
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elementSize = 2 * 7; // sub element ID sizes
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for(auto headerValue : initializer_list<uint64>{m_version, m_readVersion, m_maxIdLength, m_maxSizeLength, m_doctypeVersion, m_doctypeReadVersion}) {
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elementSize += sizeLength = EbmlElement::calculateUIntegerLength(headerValue);
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elementSize += EbmlElement::calculateSizeDenotationLength(sizeLength);
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}
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elementSize += m_doctype.size();
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elementSize += EbmlElement::calculateSizeDenotationLength(m_doctype.size());
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// write EBML header
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outputWriter.writeUInt32BE(EbmlIds::Header);
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sizeLength = EbmlElement::makeSizeDenotation(elementSize, buff);
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outputStream.write(buff, sizeLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::Version, m_version);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::ReadVersion, m_readVersion);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::MaxIdLength, m_maxIdLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::MaxSizeLength, m_maxSizeLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocType, m_doctype);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocTypeVersion, m_doctypeVersion);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocTypeReadVersion, m_doctypeReadVersion);
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// write segments
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EbmlElement *level1Element, *level2Element;
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uint64 segmentInfoElementDataSize;
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MatroskaSeekInfo seekInfo;
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MatroskaCuePositionUpdater cuesUpdater;
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// calculate size of tags
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vector<MatroskaTagMaker> tagMaker;
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uint64 tagElementsSize, tagsSize;
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uint64 tagElementsSize = 0;
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for(auto &tag : tags()) {
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tag->invalidateNotifications();
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try {
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tagMaker.emplace_back(tag->prepareMaking());
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if(tagMaker.back().requiredSize() > 3) {
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// a tag of 3 bytes size is empty and can be skipped
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tagElementsSize += tagMaker.back().requiredSize();
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}
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} catch(Failure &) {
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// nothing to do because notifications will be added anyways
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}
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addNotifications(*tag);
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}
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uint64 tagsSize = tagElementsSize ? 4 + EbmlElement::calculateSizeDenotationLength(tagElementsSize) + tagElementsSize : 0;
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// calculate size of attachments
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vector<MatroskaAttachmentMaker> attachmentMaker;
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uint64 attachedFileElementsSize, attachmentsSize;
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unsigned int segmentIndex = 0;
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unsigned int index;
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uint64 attachedFileElementsSize = 0;
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for(auto &attachment : m_attachments) {
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if(!attachment->isIgnored()) {
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attachment->invalidateNotifications();
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try {
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attachmentMaker.emplace_back(attachment->prepareMaking());
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if(attachmentMaker.back().requiredSize() > 3) {
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// an attachment of 3 bytes size is empty and can be skipped
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attachedFileElementsSize += attachmentMaker.back().requiredSize();
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}
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} catch(Failure &) {
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// nothing to do because notifications will be added anyways
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}
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addNotifications(*attachment);
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}
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}
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uint64 attachmentsSize = attachedFileElementsSize ? 4 + EbmlElement::calculateSizeDenotationLength(attachedFileElementsSize) + attachedFileElementsSize : 0;
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// check the number of segments to be written
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unsigned int lastSegmentIndex = static_cast<unsigned int>(-1);
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for(; level0Element; level0Element = level0Element->nextSibling()) {
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level0Element->parse();
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if(level0Element->id() == MatroskaIds::Segment) {
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++lastSegmentIndex;
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}
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}
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// prepare rewriting the file
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updateStatus("Preparing for rewriting Matroska/EBML file ...");
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fileInfo().close(); // ensure the file is close before renaming it
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string backupPath;
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fstream &outputStream = fileInfo().stream();
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BinaryWriter outputWriter(&outputStream);
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fstream backupStream; // create a stream to open the backup/original file
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try {
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for(; level0Element; level0Element = level0Element->nextSibling()) {
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level0Element->parse();
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switch(level0Element->id()) {
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case EbmlIds::Header:
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break; // header is already written; skip header here
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case EbmlIds::Void:
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case EbmlIds::Crc32:
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break;
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case MatroskaIds::Segment:
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// write "Segment" element
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updateStatus("Prepare writing segment ...", 0.0);
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// prepare writing tags
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// ensure seek info contains no old entries
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seekInfo.clear();
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// calculate size of tags
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tagElementsSize = 0;
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for(auto &tag : tags()) {
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tag->invalidateNotifications();
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try {
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tagMaker.emplace_back(tag->prepareMaking());
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if(tagMaker.back().requiredSize() > 3) {
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// a tag of 3 bytes size is empty and can be skipped
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tagElementsSize += tagMaker.back().requiredSize();
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}
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} catch(Failure &) {
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// nothing to do because notifications will be added anyways
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}
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addNotifications(*tag);
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}
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tagsSize = tagElementsSize ? 4 + EbmlElement::calculateSizeDenotationLength(tagElementsSize) + tagElementsSize : 0;
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// calculate size of attachments
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attachedFileElementsSize = 0;
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for(auto &attachment : m_attachments) {
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if(!attachment->isIgnored()) {
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attachment->invalidateNotifications();
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BackupHelper::createBackupFile(fileInfo().path(), backupPath, backupStream);
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// set backup stream as associated input stream since we need the original elements to write the new file
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setStream(backupStream);
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// recreate original file, define buffer variables
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outputStream.open(fileInfo().path(), ios_base::out | ios_base::binary | ios_base::trunc);
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// define needed variables
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uint64 elementSize; // the size of the current element
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uint64 clusterSize; // the new size the current cluster
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uint64 clusterReadOffset; // the read offset of the current cluster
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uint64 clusterReadSize; // the original size of the current cluster
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vector<uint64> clusterSizes; // the sizes of the cluster elements
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vector<uint64>::const_iterator clusterSizesIterator;
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uint64 readOffset = 0; // the current read offset to calculate positions
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uint64 currentOffset = 0; // the current write offset to calculate positions
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uint64 offset; // offset of the segment which is currently written, offset of "Cues"-element in segment
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bool cuesPresent; // whether the "Cues"-element is present in the current segment
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vector<tuple<uint64, uint64> > crc32Offsets; // holds the offsets of all CRC-32 elements and the length of the enclosing block
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bool elementHasCrc32; // whether the current segment has a CRC-32 element
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byte sizeLength; // size length used to make size denotations
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char buff[8]; // buffer used to make size denotations
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// calculate EBML header size
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updateStatus("Writing EBML header ...");
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elementSize = 2 * 7; // sub element ID sizes
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for(auto headerValue : initializer_list<uint64>{m_version, m_readVersion, m_maxIdLength, m_maxSizeLength, m_doctypeVersion, m_doctypeReadVersion}) {
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elementSize += sizeLength = EbmlElement::calculateUIntegerLength(headerValue);
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elementSize += EbmlElement::calculateSizeDenotationLength(sizeLength);
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}
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elementSize += m_doctype.size();
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elementSize += EbmlElement::calculateSizeDenotationLength(m_doctype.size());
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// write EBML header
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outputWriter.writeUInt32BE(EbmlIds::Header);
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sizeLength = EbmlElement::makeSizeDenotation(elementSize, buff);
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outputStream.write(buff, sizeLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::Version, m_version);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::ReadVersion, m_readVersion);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::MaxIdLength, m_maxIdLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::MaxSizeLength, m_maxSizeLength);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocType, m_doctype);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocTypeVersion, m_doctypeVersion);
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EbmlElement::makeSimpleElement(outputStream, EbmlIds::DocTypeReadVersion, m_doctypeReadVersion);
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// write segments
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EbmlElement *level1Element, *level2Element;
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uint64 segmentInfoElementDataSize;
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MatroskaSeekInfo seekInfo;
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MatroskaCuePositionUpdater cuesUpdater;
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unsigned int segmentIndex = 0;
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unsigned int index;
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try {
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for(level0Element = firstElement(); level0Element; level0Element = level0Element->nextSibling()) {
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switch(level0Element->id()) {
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case EbmlIds::Header:
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break; // header is already written; skip header here
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case EbmlIds::Void:
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case EbmlIds::Crc32:
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break;
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case MatroskaIds::Segment:
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// write "Segment" element
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updateStatus("Prepare writing segment ...", 0.0);
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// prepare writing tags
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// ensure seek info contains no old entries
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seekInfo.clear();
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// parse cues
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cuesUpdater.invalidateNotifications();
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if((level1Element = level0Element->childById(MatroskaIds::Cues))) {
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cuesPresent = true;
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try {
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attachmentMaker.emplace_back(attachment->prepareMaking());
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if(attachmentMaker.back().requiredSize() > 3) {
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// an attachment of 3 bytes size is empty and can be skipped
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attachedFileElementsSize += attachmentMaker.back().requiredSize();
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}
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cuesUpdater.parse(level1Element);
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} catch(Failure &) {
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// nothing to do because notifications will be added anyways
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addNotifications(cuesUpdater);
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throw;
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}
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addNotifications(*attachment);
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}
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}
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attachmentsSize = attachedFileElementsSize ? 4 + EbmlElement::calculateSizeDenotationLength(attachedFileElementsSize) + attachedFileElementsSize : 0;
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// parse cues
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cuesUpdater.invalidateNotifications();
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if((level1Element = level0Element->childById(MatroskaIds::Cues))) {
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cuesPresent = true;
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try {
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cuesUpdater.parse(level1Element);
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} catch(Failure &) {
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addNotifications(cuesUpdater);
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throw;
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}
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addNotifications(cuesUpdater);
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} else {
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cuesPresent = false;
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}
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// check whether the segment has a CRC-32 element
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elementHasCrc32 = level0Element->firstChild() && level0Element->firstChild()->id() == EbmlIds::Crc32;
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// calculate segment size
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calculateSegmentSize:
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// CRC-32 element is 6 byte long
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elementSize = elementHasCrc32 ? 6 : 0;
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// calculate size of "SeekHead"-element
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elementSize += seekInfo.actualSize();
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// pretend writing elements to find out the offsets and the total segment size
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// pretend writing "SegmentInfo"-element
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for(level1Element = level0Element->childById(MatroskaIds::SegmentInfo), index = 0; level1Element; level1Element = level1Element->siblingById(MatroskaIds::SegmentInfo), ++index) {
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// update offset in "SeekHead"-element
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if(seekInfo.push(index, MatroskaIds::SegmentInfo, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "SegmentInfo"-element
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// -> size of "MuxingApp"- and "WritingApp"-element
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segmentInfoElementDataSize = 2 * appInfoElementTotalSize;
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// -> add size of "Title"-element
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if(segmentIndex < m_titles.size()) {
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const auto &title = m_titles[segmentIndex];
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if(!title.empty()) {
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segmentInfoElementDataSize += 2 + EbmlElement::calculateSizeDenotationLength(title.size()) + title.size();
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cuesPresent = false;
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}
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// check whether the segment has a CRC-32 element
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elementHasCrc32 = level0Element->firstChild() && level0Element->firstChild()->id() == EbmlIds::Crc32;
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// calculate segment size
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calculateSegmentSize:
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// CRC-32 element is 6 byte long
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elementSize = elementHasCrc32 ? 6 : 0;
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// calculate size of "SeekHead"-element
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elementSize += seekInfo.actualSize();
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// pretend writing elements to find out the offsets and the total segment size
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// pretend writing "SegmentInfo"-element
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for(level1Element = level0Element->childById(MatroskaIds::SegmentInfo), index = 0; level1Element; level1Element = level1Element->siblingById(MatroskaIds::SegmentInfo), ++index) {
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// update offset in "SeekHead"-element
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if(seekInfo.push(index, MatroskaIds::SegmentInfo, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "SegmentInfo"-element
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// -> size of "MuxingApp"- and "WritingApp"-element
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segmentInfoElementDataSize = 2 * appInfoElementTotalSize;
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// -> add size of "Title"-element
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if(segmentIndex < m_titles.size()) {
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const auto &title = m_titles[segmentIndex];
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if(!title.empty()) {
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segmentInfoElementDataSize += 2 + EbmlElement::calculateSizeDenotationLength(title.size()) + title.size();
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}
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}
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// -> add size of other childs
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for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
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level2Element->parse();
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switch(level2Element->id()) {
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case EbmlIds::Void: // skipped
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case EbmlIds::Crc32: // skipped
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case MatroskaIds::Title: // calculated separately
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case MatroskaIds::MuxingApp: // calculated separately
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case MatroskaIds::WrittingApp: // calculated separately
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break;
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default:
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segmentInfoElementDataSize += level2Element->totalSize();
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}
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}
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// -> calculate total size
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elementSize += 4 + EbmlElement::calculateSizeDenotationLength(segmentInfoElementDataSize) + segmentInfoElementDataSize;
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}
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}
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// pretend writing "Tracks"- and "Chapters"-element
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for(const auto id : initializer_list<EbmlElement::identifierType>{MatroskaIds::Tracks, MatroskaIds::Chapters}) {
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for(level1Element = level0Element->childById(id), index = 0; level1Element; level1Element = level1Element->siblingById(id), ++index) {
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// update offset in "SeekHead"-element
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if(seekInfo.push(index, id, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of element
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elementSize += level1Element->totalSize();
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}
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}
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// -> add size of other childs
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}
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// all "Tags"- and "Attachments"-elements are written in either the first or the last segment
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// and either before "Cues"- and "Cluster"-elements or after these elements
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// depending on the desired tag position (at the front/at the end)
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if(fileInfo().tagPosition() == TagPosition::BeforeData && segmentIndex == 0) {
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// pretend writing "Tags"-element
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if(tagsSize) {
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// update offsets in "SeekHead"-element
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if(seekInfo.push(0, MatroskaIds::Tags, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "Tags"-element
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elementSize += tagsSize;
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}
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}
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// pretend writing "Attachments"-element
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if(attachmentsSize) {
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// update offsets in "SeekHead"-element
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if(seekInfo.push(0, MatroskaIds::Attachments, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "Attachments"-element
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elementSize += attachmentsSize;
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}
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}
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}
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// pretend writing "Cues"-element
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if(cuesPresent) {
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offset = elementSize; // save current offset
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// update offset of "Cues"-element in "SeekHead"-element
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if(seekInfo.push(0, MatroskaIds::Cues, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "Cues"-element
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addCuesElementSize:
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elementSize += cuesUpdater.totalSize();
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}
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}
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// pretend writing "Cluster"-element
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clusterSizes.clear();
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for(level1Element = level0Element->childById(MatroskaIds::Cluster), index = 0; level1Element; level1Element = level1Element->siblingById(MatroskaIds::Cluster), ++index) {
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// update offset of "Cluster"-element in "Cues"-element
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//if(cuesPresent && cuesUpdater.updatePositions(currentOffset + level1Element->startOffset() - level0Element->dataOffset(), elementSize)) {
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clusterReadOffset = level1Element->startOffset() - level0Element->dataOffset() + readOffset;
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if(cuesPresent && cuesUpdater.updateOffsets(clusterReadOffset, currentOffset + elementSize)) {
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elementSize = offset; // reset element size to previously saved offset of "Cues"-element
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goto addCuesElementSize;
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} else {
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if(index == 0 && seekInfo.push(index, MatroskaIds::Cluster, currentOffset + elementSize)) {
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goto calculateSegmentSize;
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} else {
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// add size of "Cluster"-element
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clusterSize = 0;
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clusterReadSize = 0;
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for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
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level2Element->parse();
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if(cuesPresent && cuesUpdater.updateRelativeOffsets(clusterReadOffset, clusterReadSize, clusterSize)) {
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elementSize = offset;
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goto addCuesElementSize;
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}
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switch(level2Element->id()) {
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case EbmlIds::Void:
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case EbmlIds::Crc32:
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break;
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case MatroskaIds::Position:
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clusterSize += 1 + 1 + EbmlElement::calculateUIntegerLength(currentOffset + elementSize);
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break;
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default:
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clusterSize += level2Element->totalSize();
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}
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clusterReadSize += level2Element->totalSize();
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}
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||||
clusterSizes.push_back(clusterSize);
|
||||
elementSize += 4 + EbmlElement::calculateSizeDenotationLength(clusterSize) + clusterSize;
|
||||
}
|
||||
}
|
||||
}
|
||||
if(fileInfo().tagPosition() == TagPosition::AfterData && segmentIndex == lastSegmentIndex) {
|
||||
// pretend writing "Tags"-element
|
||||
if(tagsSize) {
|
||||
// update offsets in "SeekHead"-element
|
||||
if(seekInfo.push(0, MatroskaIds::Tags, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Tags"-element
|
||||
elementSize += tagsSize;
|
||||
}
|
||||
}
|
||||
// pretend writing "Attachments"-element
|
||||
if(attachmentsSize) {
|
||||
// update offsets in "SeekHead"-element
|
||||
if(seekInfo.push(0, MatroskaIds::Attachments, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Attachments"-element
|
||||
elementSize += attachmentsSize;
|
||||
}
|
||||
}
|
||||
}
|
||||
// write "Segment"-element actually
|
||||
updateStatus("Writing segment header ...");
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Segment);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(elementSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
offset = outputStream.tellp(); // store segment data offset here
|
||||
// write CRC-32 element ...
|
||||
if(elementHasCrc32) {
|
||||
// ... if the original element had a CRC-32 element
|
||||
*buff = EbmlIds::Crc32;
|
||||
*(buff + 1) = 0x84; // length denotation: 4 byte
|
||||
// set the value after writing the element
|
||||
crc32Offsets.emplace_back(outputStream.tellp(), elementSize);
|
||||
outputStream.write(buff, 6);
|
||||
}
|
||||
// write "SeekHead"-element (except there is no seek information for the current segment)
|
||||
seekInfo.invalidateNotifications();
|
||||
seekInfo.make(outputStream);
|
||||
addNotifications(seekInfo);
|
||||
// write "SegmentInfo"-element
|
||||
for(level1Element = level0Element->childById(MatroskaIds::SegmentInfo); level1Element; level1Element = level1Element->siblingById(MatroskaIds::SegmentInfo)) {
|
||||
// -> write ID and size
|
||||
outputWriter.writeUInt32BE(MatroskaIds::SegmentInfo);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(segmentInfoElementDataSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
// -> write childs
|
||||
for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
|
||||
level2Element->parse();
|
||||
switch(level2Element->id()) {
|
||||
case EbmlIds::Void: // skipped
|
||||
case EbmlIds::Crc32: // skipped
|
||||
case MatroskaIds::Title: // calculated separately
|
||||
case MatroskaIds::MuxingApp: // calculated separately
|
||||
case MatroskaIds::WrittingApp: // calculated separately
|
||||
case MatroskaIds::Title: // written separately
|
||||
case MatroskaIds::MuxingApp: // written separately
|
||||
case MatroskaIds::WrittingApp: // written separately
|
||||
break;
|
||||
default:
|
||||
segmentInfoElementDataSize += level2Element->totalSize();
|
||||
level2Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// -> calculate total size
|
||||
elementSize += 4 + EbmlElement::calculateSizeDenotationLength(segmentInfoElementDataSize) + segmentInfoElementDataSize;
|
||||
}
|
||||
}
|
||||
// pretend writing "Tracks"- and "Chapters"-element
|
||||
for(const auto id : initializer_list<EbmlElement::identifierType>{MatroskaIds::Tracks, MatroskaIds::Chapters}) {
|
||||
for(level1Element = level0Element->childById(id), index = 0; level1Element; level1Element = level1Element->siblingById(id), ++index) {
|
||||
// update offset in "SeekHead"-element
|
||||
if(seekInfo.push(index, id, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of element
|
||||
elementSize += level1Element->totalSize();
|
||||
}
|
||||
}
|
||||
}
|
||||
// pretend writing "Attachments"-element
|
||||
if(attachmentsSize) {
|
||||
// update offsets in "SeekHead"-element
|
||||
if(seekInfo.push(0, MatroskaIds::Attachments, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Attachments"-element
|
||||
elementSize += attachmentsSize;
|
||||
}
|
||||
}
|
||||
// pretend writing "Tags"-element
|
||||
if(tagsSize) {
|
||||
// update offsets in "SeekHead"-element
|
||||
if(seekInfo.push(0, MatroskaIds::Tags, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Tags"-element
|
||||
elementSize += tagsSize;
|
||||
}
|
||||
}
|
||||
// pretend writing "Cues"-element
|
||||
if(cuesPresent) {
|
||||
offset = elementSize; // save current offset
|
||||
// update offset of "Cues"-element in "SeekHead"-element
|
||||
if(seekInfo.push(0, MatroskaIds::Cues, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Cues"-element
|
||||
addCuesElementSize:
|
||||
elementSize += cuesUpdater.totalSize();
|
||||
}
|
||||
}
|
||||
// pretend writing "Cluster"-element
|
||||
clusterSizes.clear();
|
||||
for(level1Element = level0Element->childById(MatroskaIds::Cluster), index = 0; level1Element; level1Element = level1Element->siblingById(MatroskaIds::Cluster), ++index) {
|
||||
// update offset of "Cluster"-element in "Cues"-element
|
||||
//if(cuesPresent && cuesUpdater.updatePositions(currentOffset + level1Element->startOffset() - level0Element->dataOffset(), elementSize)) {
|
||||
clusterReadOffset = level1Element->startOffset() - level0Element->dataOffset() + readOffset;
|
||||
if(cuesPresent && cuesUpdater.updateOffsets(clusterReadOffset, currentOffset + elementSize)) {
|
||||
elementSize = offset; // reset element size to previously saved offset of "Cues"-element
|
||||
goto addCuesElementSize;
|
||||
} else {
|
||||
if(index == 0 && seekInfo.push(index, MatroskaIds::Cluster, currentOffset + elementSize)) {
|
||||
goto calculateSegmentSize;
|
||||
} else {
|
||||
// add size of "Cluster"-element
|
||||
clusterSize = 0;
|
||||
clusterReadSize = 0;
|
||||
for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
|
||||
level2Element->parse();
|
||||
if(cuesPresent && cuesUpdater.updateRelativeOffsets(clusterReadOffset, clusterReadSize, clusterSize)) {
|
||||
elementSize = offset;
|
||||
goto addCuesElementSize;
|
||||
}
|
||||
switch(level2Element->id()) {
|
||||
case EbmlIds::Void:
|
||||
case EbmlIds::Crc32:
|
||||
break;
|
||||
case MatroskaIds::Position:
|
||||
clusterSize += 1 + 1 + EbmlElement::calculateUIntegerLength(currentOffset + elementSize);
|
||||
break;
|
||||
default:
|
||||
clusterSize += level2Element->totalSize();
|
||||
}
|
||||
clusterReadSize += level2Element->totalSize();
|
||||
// -> write "Title"-element
|
||||
if(segmentIndex < m_titles.size()) {
|
||||
const auto &title = m_titles[segmentIndex];
|
||||
if(!title.empty()) {
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::Title, title);
|
||||
}
|
||||
clusterSizes.push_back(clusterSize);
|
||||
elementSize += 4 + EbmlElement::calculateSizeDenotationLength(clusterSize) + clusterSize;
|
||||
}
|
||||
// -> write "MuxingApp"- and "WritingApp"-element
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::MuxingApp, appInfo, appInfoElementDataSize);
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::WrittingApp, appInfo, appInfoElementDataSize);
|
||||
}
|
||||
// write "Tracks"- and "Chapters"-element
|
||||
for(const auto id : initializer_list<EbmlElement::identifierType>{MatroskaIds::Tracks, MatroskaIds::Chapters}) {
|
||||
for(level1Element = level0Element->childById(id); level1Element; level1Element = level1Element->siblingById(id)) {
|
||||
level1Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
}
|
||||
// write "Segment"-element actually
|
||||
updateStatus("Writing segment header ...");
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Segment);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(elementSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
offset = outputStream.tellp(); // store segment data offset here
|
||||
// write CRC-32 element ...
|
||||
if(elementHasCrc32) {
|
||||
// ... if the original element had a CRC-32 element
|
||||
*buff = EbmlIds::Crc32;
|
||||
*(buff + 1) = 0x84; // length denotation: 4 byte
|
||||
// set the value after writing the element
|
||||
crc32Offsets.emplace_back(outputStream.tellp(), elementSize);
|
||||
outputStream.write(buff, 6);
|
||||
}
|
||||
// write "SeekHead"-element (except there is no seek information for the current segment)
|
||||
seekInfo.invalidateNotifications();
|
||||
seekInfo.make(outputStream);
|
||||
addNotifications(seekInfo);
|
||||
// write "SegmentInfo"-element
|
||||
for(level1Element = level0Element->childById(MatroskaIds::SegmentInfo); level1Element; level1Element = level1Element->siblingById(MatroskaIds::SegmentInfo)) {
|
||||
// -> write ID and size
|
||||
outputWriter.writeUInt32BE(MatroskaIds::SegmentInfo);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(segmentInfoElementDataSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
// -> write childs
|
||||
for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
|
||||
switch(level2Element->id()) {
|
||||
case EbmlIds::Void: // skipped
|
||||
case EbmlIds::Crc32: // skipped
|
||||
case MatroskaIds::Title: // written separately
|
||||
case MatroskaIds::MuxingApp: // written separately
|
||||
case MatroskaIds::WrittingApp: // written separately
|
||||
break;
|
||||
default:
|
||||
level2Element->copyEntirely(outputStream);
|
||||
if(fileInfo().tagPosition() == TagPosition::BeforeData && segmentIndex == 0) {
|
||||
// write "Tags"-element
|
||||
if(tagsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Tags);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(tagElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : tagMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
// write "Attachments"-element
|
||||
if(attachmentsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Attachments);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(attachedFileElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : attachmentMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
}
|
||||
// -> write "Title"-element
|
||||
if(segmentIndex < m_titles.size()) {
|
||||
const auto &title = m_titles[segmentIndex];
|
||||
if(!title.empty()) {
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::Title, title);
|
||||
// write "Cues"-element
|
||||
if(cuesPresent) {
|
||||
try {
|
||||
cuesUpdater.make(outputStream);
|
||||
} catch(Failure &) {
|
||||
addNotifications(cuesUpdater);
|
||||
throw;
|
||||
}
|
||||
}
|
||||
// -> write "MuxingApp"- and "WritingApp"-element
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::MuxingApp, appInfo, appInfoElementDataSize);
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::WrittingApp, appInfo, appInfoElementDataSize);
|
||||
}
|
||||
// write "Tracks"- and "Chapters"-element
|
||||
for(const auto id : initializer_list<EbmlElement::identifierType>{MatroskaIds::Tracks, MatroskaIds::Chapters}) {
|
||||
for(level1Element = level0Element->childById(id); level1Element; level1Element = level1Element->siblingById(id)) {
|
||||
level1Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// write "Attachments"-element
|
||||
if(attachmentsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Attachments);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(attachedFileElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : attachmentMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
// write "Tags"-element
|
||||
if(tagsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Tags);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(tagElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : tagMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
// write "Cues"-element
|
||||
if(cuesPresent) {
|
||||
try {
|
||||
cuesUpdater.make(outputStream);
|
||||
} catch(Failure &) {
|
||||
addNotifications(cuesUpdater);
|
||||
throw;
|
||||
}
|
||||
}
|
||||
// update status, check whether the operation has been aborted
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
} else {
|
||||
addNotifications(cuesUpdater);
|
||||
updateStatus("Writing segment data ...", static_cast<double>(static_cast<uint64>(outputStream.tellp()) - offset) / elementSize);
|
||||
}
|
||||
// write "Cluster"-element
|
||||
for(level1Element = level0Element->childById(MatroskaIds::Cluster), clusterSizesIterator = clusterSizes.cbegin();
|
||||
level1Element; level1Element = level1Element->siblingById(MatroskaIds::Cluster), ++clusterSizesIterator) {
|
||||
// calculate position of cluster in segment
|
||||
clusterSize = currentOffset + (static_cast<uint64>(outputStream.tellp()) - offset);
|
||||
// write header; checking whether clusterSizesIterator is valid shouldn't be necessary
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Cluster);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(*clusterSizesIterator, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
// write childs
|
||||
for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
|
||||
switch(level2Element->id()) {
|
||||
case EbmlIds::Void:
|
||||
case EbmlIds::Crc32:
|
||||
break;
|
||||
case MatroskaIds::Position:
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::Position, clusterSize);
|
||||
break;
|
||||
default:
|
||||
level2Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// update percentage, check whether the operation has been aborted
|
||||
// update status, check whether the operation has been aborted
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
} else {
|
||||
updatePercentage(static_cast<double>(static_cast<uint64>(outputStream.tellp()) - offset) / elementSize);
|
||||
addNotifications(cuesUpdater);
|
||||
updateStatus("Writing segment data ...", static_cast<double>(static_cast<uint64>(outputStream.tellp()) - offset) / elementSize);
|
||||
}
|
||||
// write "Cluster"-element
|
||||
for(level1Element = level0Element->childById(MatroskaIds::Cluster), clusterSizesIterator = clusterSizes.cbegin();
|
||||
level1Element; level1Element = level1Element->siblingById(MatroskaIds::Cluster), ++clusterSizesIterator) {
|
||||
// calculate position of cluster in segment
|
||||
clusterSize = currentOffset + (static_cast<uint64>(outputStream.tellp()) - offset);
|
||||
// write header; checking whether clusterSizesIterator is valid shouldn't be necessary
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Cluster);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(*clusterSizesIterator, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
// write childs
|
||||
for(level2Element = level1Element->firstChild(); level2Element; level2Element = level2Element->nextSibling()) {
|
||||
switch(level2Element->id()) {
|
||||
case EbmlIds::Void:
|
||||
case EbmlIds::Crc32:
|
||||
break;
|
||||
case MatroskaIds::Position:
|
||||
EbmlElement::makeSimpleElement(outputStream, MatroskaIds::Position, clusterSize);
|
||||
break;
|
||||
default:
|
||||
level2Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// update percentage, check whether the operation has been aborted
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
} else {
|
||||
updatePercentage(static_cast<double>(static_cast<uint64>(outputStream.tellp()) - offset) / elementSize);
|
||||
}
|
||||
}
|
||||
if(fileInfo().tagPosition() == TagPosition::AfterData && segmentIndex == lastSegmentIndex) {
|
||||
// write "Tags"-element
|
||||
if(tagsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Tags);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(tagElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : tagMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
// write "Attachments"-element
|
||||
if(attachmentsSize) {
|
||||
outputWriter.writeUInt32BE(MatroskaIds::Attachments);
|
||||
sizeLength = EbmlElement::makeSizeDenotation(attachedFileElementsSize, buff);
|
||||
outputStream.write(buff, sizeLength);
|
||||
for(auto &maker : attachmentMaker) {
|
||||
maker.make(outputStream);
|
||||
}
|
||||
// no need to add notifications; this has been done when creating the make
|
||||
}
|
||||
}
|
||||
++segmentIndex; // increase the current segment index
|
||||
currentOffset += 4 + sizeLength + elementSize; // increase current write offset by the size of the segment which has just been written
|
||||
readOffset = level0Element->totalSize(); // increase the read offset by the size of the segment read from the orignial file
|
||||
break;
|
||||
default:
|
||||
// just copy any unknown top-level elements
|
||||
addNotification(NotificationType::Warning, "The top-level element \"" + level0Element->idToString() + "\" of the original file is unknown and will just be copied.", context);
|
||||
level0Element->copyEntirely(outputStream);
|
||||
}
|
||||
++segmentIndex; // increase the current segment index
|
||||
currentOffset += 4 + sizeLength + elementSize; // increase current write offset by the size of the segment which has just been written
|
||||
readOffset = level0Element->totalSize(); // increase the read offset by the size of the segment read from the orignial file
|
||||
break;
|
||||
default:
|
||||
// just copy any unknown top-level elements
|
||||
addNotification(NotificationType::Warning, "The top-level element \"" + level0Element->idToString() + "\" of the original file is unknown and will just be copied.", context);
|
||||
level0Element->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
} catch(Failure &) {
|
||||
addNotifications(cuesUpdater);
|
||||
addNotification(NotificationType::Critical, "Unable to parse content in top-level element at " + numberToString(level0Element->startOffset()) + " of original file.", context);
|
||||
throw;
|
||||
}
|
||||
// reparse what is written so far
|
||||
updateStatus("Reparsing output file ...");
|
||||
outputStream.close(); // the outputStream needs to be reopened to be able to read again
|
||||
outputStream.open(fileInfo().path(), ios_base::in | ios_base::out | ios_base::binary);
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
try {
|
||||
parseHeader();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to reparse the header of the new file.", context);
|
||||
throw;
|
||||
}
|
||||
// update CRC-32 checksums
|
||||
if(!crc32Offsets.empty()) {
|
||||
updateStatus("Updating CRC-32 checksums ...");
|
||||
for(const auto &crc32Offset : crc32Offsets) {
|
||||
outputStream.seekg(get<0>(crc32Offset) + 6);
|
||||
outputStream.seekp(get<0>(crc32Offset) + 2);
|
||||
writer().writeUInt32LE(reader().readCrc32(get<1>(crc32Offset) - 6));
|
||||
} catch(Failure &) {
|
||||
addNotifications(cuesUpdater);
|
||||
addNotification(NotificationType::Critical, "Unable to parse content in top-level element at " + numberToString(level0Element->startOffset()) + " of original file.", context);
|
||||
throw;
|
||||
}
|
||||
// reparse what is written so far
|
||||
updateStatus("Reparsing output file ...");
|
||||
outputStream.close(); // the outputStream needs to be reopened to be able to read again
|
||||
outputStream.open(fileInfo().path(), ios_base::in | ios_base::out | ios_base::binary);
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
try {
|
||||
parseHeader();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to reparse the header of the new file.", context);
|
||||
throw;
|
||||
}
|
||||
// update CRC-32 checksums
|
||||
if(!crc32Offsets.empty()) {
|
||||
updateStatus("Updating CRC-32 checksums ...");
|
||||
for(const auto &crc32Offset : crc32Offsets) {
|
||||
outputStream.seekg(get<0>(crc32Offset) + 6);
|
||||
outputStream.seekp(get<0>(crc32Offset) + 2);
|
||||
writer().writeUInt32LE(reader().readCrc32(get<1>(crc32Offset) - 6));
|
||||
}
|
||||
}
|
||||
updatePercentage(100.0);
|
||||
// flush output stream
|
||||
outputStream.flush();
|
||||
// handle errors which occured after renaming/creating backup file
|
||||
} catch(OperationAbortedException &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Information, "Rewriting the file to apply changed tag information has been aborted.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
throw;
|
||||
} catch(Failure &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Critical, "Rewriting the file to apply changed tag information failed.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
throw;
|
||||
} catch(ios_base::failure &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Critical, "An IO error occured when rewriting the file to apply changed tag information.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
throw;
|
||||
}
|
||||
updatePercentage(100.0);
|
||||
// flush output stream
|
||||
outputStream.flush();
|
||||
} catch(OperationAbortedException &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Information, "Rewriting the file to apply changed tag information has been aborted.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
throw;
|
||||
// handle errors which occured before renaming/creating backup file
|
||||
} catch(Failure &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Critical, "Rewriting the file to apply changed tag information failed.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
addNotification(NotificationType::Critical, "Parsing the original file failed.", context);
|
||||
throw;
|
||||
} catch(ios_base::failure &) {
|
||||
setStream(outputStream);
|
||||
reset();
|
||||
addNotification(NotificationType::Critical, "An IO error occured when rewriting the file to apply changed tag information.", context);
|
||||
BackupHelper::restoreOriginalFileFromBackupFile(fileInfo().path(), backupPath, outputStream, backupStream);
|
||||
addNotification(NotificationType::Critical, "An IO error occured when parsing the original file.", context);
|
||||
throw;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -53,13 +53,12 @@ namespace Media {
|
|||
|
||||
/*!
|
||||
* \class Media::MediaFileInfo
|
||||
* \brief The MediaFileInfo class extends the BasicFileInfo class.
|
||||
* \brief The MediaFileInfo class allows to read and write tag information providing
|
||||
* a container/tag format independent interface.
|
||||
*
|
||||
* The MediaFileInfo class allows to read and edit meta information
|
||||
* of MP3 files with ID3 tag and MP4 files with iTunes tag. It also
|
||||
* provides some technical information about these types of files such
|
||||
* as contained streams.
|
||||
* A bunch of other file types (see Media::ContainerFormat) can be recognized.
|
||||
* It also provides some technical information such as contained streams.
|
||||
*
|
||||
* For examples see "cli/mainfeatures.cpp" of the tageditor repository.
|
||||
*/
|
||||
|
||||
/*!
|
||||
|
|
@ -74,7 +73,11 @@ MediaFileInfo::MediaFileInfo() :
|
|||
m_tagsParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_chaptersParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_attachmentsParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_forceFullParse(MEDIAINFO_CPP_FORCE_FULL_PARSE)
|
||||
m_forceFullParse(MEDIAINFO_CPP_FORCE_FULL_PARSE),
|
||||
m_minPadding(0),
|
||||
m_maxPadding(0),
|
||||
m_tagPosition(TagPosition::BeforeData),
|
||||
m_forceTagPosition(true)
|
||||
{}
|
||||
|
||||
/*!
|
||||
|
|
@ -92,7 +95,11 @@ MediaFileInfo::MediaFileInfo(const string &path) :
|
|||
m_tagsParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_chaptersParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_attachmentsParsingStatus(ParsingStatus::NotParsedYet),
|
||||
m_forceFullParse(MEDIAINFO_CPP_FORCE_FULL_PARSE)
|
||||
m_forceFullParse(MEDIAINFO_CPP_FORCE_FULL_PARSE),
|
||||
m_minPadding(0),
|
||||
m_maxPadding(0),
|
||||
m_tagPosition(TagPosition::BeforeData),
|
||||
m_forceTagPosition(true)
|
||||
{}
|
||||
|
||||
/*!
|
||||
|
|
@ -181,7 +188,7 @@ startParsingSignature:
|
|||
addNotifications(notifications);
|
||||
break;
|
||||
} case ContainerFormat::Ebml: {
|
||||
unique_ptr<MatroskaContainer> container = make_unique<MatroskaContainer>(*this, m_containerOffset);
|
||||
auto container = make_unique<MatroskaContainer>(*this, m_containerOffset);
|
||||
NotificationList notifications;
|
||||
try {
|
||||
container->parseHeader();
|
||||
|
|
|
|||
111
mediafileinfo.h
111
mediafileinfo.h
|
|
@ -40,6 +40,12 @@ enum class TagUsage
|
|||
Never /**< tags of the type are never used; a possibly existing tag of the type is removed */
|
||||
};
|
||||
|
||||
enum class TagPosition
|
||||
{
|
||||
BeforeData,
|
||||
AfterData
|
||||
};
|
||||
|
||||
/*!
|
||||
* \brief The ParsingStatus enum specifies whether a certain part of the file (tracks, tags, ...) has
|
||||
* been parsed yet and if what the parsing result is.
|
||||
|
|
@ -135,6 +141,14 @@ public:
|
|||
// methods to get, set object behaviour
|
||||
bool isForcingFullParse() const;
|
||||
void setForceFullParse(bool forceFullParse);
|
||||
size_t minPadding() const;
|
||||
void setMinPadding(size_t minPadding);
|
||||
size_t maxPadding() const;
|
||||
void setMaxPadding(size_t maxPadding);
|
||||
TagPosition tagPosition() const;
|
||||
void setTagPosition(TagPosition tagPosition);
|
||||
bool forceTagPosition() const;
|
||||
void setForceTagPosition(bool forceTagPosition);
|
||||
|
||||
protected:
|
||||
virtual void invalidated();
|
||||
|
|
@ -164,6 +178,10 @@ private:
|
|||
ParsingStatus m_attachmentsParsingStatus;
|
||||
// fields specifying object behaviour
|
||||
bool m_forceFullParse;
|
||||
size_t m_minPadding;
|
||||
size_t m_maxPadding;
|
||||
TagPosition m_tagPosition;
|
||||
bool m_forceTagPosition;
|
||||
};
|
||||
|
||||
/*!
|
||||
|
|
@ -362,6 +380,99 @@ inline void MediaFileInfo::setForceFullParse(bool forceFullParse)
|
|||
m_forceFullParse = forceFullParse;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns the minimum padding to be written before the data blocks when applying changes.
|
||||
*
|
||||
* Padding in front of the file allows adding additional fields afterwards whithout needing
|
||||
* to rewrite the entire file or to put tag information at the end of the file.
|
||||
*
|
||||
* \sa maxPadding()
|
||||
* \sa tagPosition()
|
||||
* \sa setMinPadding()
|
||||
*/
|
||||
inline size_t MediaFileInfo::minPadding() const
|
||||
{
|
||||
return m_minPadding;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Sets the minimum padding to be written before the data blocks when applying changes.
|
||||
* \remarks This value might be ignored if not supported by the container/tag format or the corresponding implementation.
|
||||
* \sa minPadding()
|
||||
*/
|
||||
inline void MediaFileInfo::setMinPadding(size_t minPadding)
|
||||
{
|
||||
m_minPadding = minPadding;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns the maximum padding to be written before the data blocks when applying changes.
|
||||
*
|
||||
* Padding in front of the file allows adding additional fields afterwards whithout needing
|
||||
* to rewrite the entire file or to put tag information at the end of the file.
|
||||
*
|
||||
* \sa minPadding()
|
||||
* \sa tagPosition()
|
||||
* \sa setMaxPadding()
|
||||
*/
|
||||
inline size_t MediaFileInfo::maxPadding() const
|
||||
{
|
||||
return m_maxPadding;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Sets the maximum padding to be written before the data blocks when applying changes.
|
||||
* \remarks This value might be ignored if not supported by the container/tag format or the corresponding implementation.
|
||||
* \sa maxPadding()
|
||||
*/
|
||||
inline void MediaFileInfo::setMaxPadding(size_t maxPadding)
|
||||
{
|
||||
m_maxPadding = maxPadding;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns the position (in the output file) where the tag information is written when applying changes.
|
||||
* \sa setTagPosition()
|
||||
*/
|
||||
inline TagPosition MediaFileInfo::tagPosition() const
|
||||
{
|
||||
return m_tagPosition;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Sets the position (in the output file) where the tag information is written when applying changes.
|
||||
*
|
||||
* \remarks
|
||||
* - If putting the tags at another position would prevent rewriting the entire file the specified position
|
||||
* might not be used if forceTagPosition() is false.
|
||||
* - However if the specified position is not supported by the container/tag format or by the implementation
|
||||
* for the format it is ignored (even if forceTagPosition() is true).
|
||||
*/
|
||||
inline void MediaFileInfo::setTagPosition(TagPosition tagPosition)
|
||||
{
|
||||
m_tagPosition = tagPosition;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Returns whether tagPosition() is forced.
|
||||
* \sa setForceTagPosition()
|
||||
* \sa tagPosition(), setTagPosition()
|
||||
*/
|
||||
inline bool MediaFileInfo::forceTagPosition() const
|
||||
{
|
||||
return m_forceTagPosition;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Sets whether tagPosition() is forced.
|
||||
* \sa forceTagPosition()
|
||||
* \sa tagPosition(), setTagPosition()
|
||||
*/
|
||||
inline void MediaFileInfo::setForceTagPosition(bool forceTagPosition)
|
||||
{
|
||||
m_forceTagPosition = forceTagPosition;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endif // MEDIAINFO_H
|
||||
|
|
|
|||
|
|
@ -78,7 +78,7 @@ void Mp4Atom::internalParse()
|
|||
}
|
||||
m_id = reader().readUInt32BE();
|
||||
m_idLength = 4;
|
||||
if(dataSize() == 1) { // atom denotes 64-bit size
|
||||
if(m_dataSize == 1) { // atom denotes 64-bit size
|
||||
m_dataSize = reader().readUInt64BE();
|
||||
m_sizeLength = 12; // 4 bytes indicate long size denotation + 8 bytes for actual size denotation
|
||||
if(dataSize() < 16 && m_dataSize != 1) {
|
||||
|
|
@ -116,24 +116,37 @@ void Mp4Atom::internalParse()
|
|||
* \brief This function helps to write the atom size after writing an atom to a stream.
|
||||
* \param stream Specifies the stream.
|
||||
* \param startOffset Specifies the start offset of the atom.
|
||||
* \param denote64BitSize Specifies whether the atom denotes its size with a 64-bit unsigned integer.
|
||||
*
|
||||
* This function seeks back to the start offset and writes the difference between the
|
||||
* previous offset and the start offset as 32-bit unsigned integer to the \a stream.
|
||||
* Then it seeks back to the previous offset.
|
||||
*/
|
||||
void Mp4Atom::seekBackAndWriteAtomSize(std::ostream &stream, const ostream::pos_type &startOffset, bool denote64BitSize)
|
||||
void Mp4Atom::seekBackAndWriteAtomSize(std::ostream &stream, const ostream::pos_type &startOffset)
|
||||
{
|
||||
ostream::pos_type currentOffset = stream.tellp();
|
||||
stream.seekp(startOffset);
|
||||
BinaryWriter writer(&stream);
|
||||
if(denote64BitSize) {
|
||||
writer.writeUInt32BE(0);
|
||||
stream.seekp(4, ios_base::cur);
|
||||
writer.writeUInt64BE(currentOffset - startOffset);
|
||||
} else {
|
||||
writer.writeUInt32BE(currentOffset - startOffset);
|
||||
}
|
||||
writer.writeUInt32BE(currentOffset - startOffset);
|
||||
stream.seekp(currentOffset);
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief This function helps to write the atom size after writing an atom to a stream.
|
||||
* \param stream Specifies the stream.
|
||||
* \param startOffset Specifies the start offset of the atom.
|
||||
*
|
||||
* This function seeks back to the start offset and writes the difference between the
|
||||
* previous offset and the start offset as 64-bit unsigned integer to the \a stream.
|
||||
* Then it seeks back to the previous offset.
|
||||
*/
|
||||
void Mp4Atom::seekBackAndWriteAtomSize64(std::ostream &stream, const ostream::pos_type &startOffset)
|
||||
{
|
||||
ostream::pos_type currentOffset = stream.tellp();
|
||||
stream.seekp(startOffset);
|
||||
BinaryWriter writer(&stream);
|
||||
writer.writeUInt32BE(1);
|
||||
stream.seekp(4, ios_base::cur);
|
||||
writer.writeUInt64BE(currentOffset - startOffset);
|
||||
stream.seekp(currentOffset);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -66,7 +66,8 @@ public:
|
|||
bool isPadding() const;
|
||||
uint64 firstChildOffset() const;
|
||||
|
||||
static void seekBackAndWriteAtomSize(std::ostream &stream, const std::ostream::pos_type &startOffset, bool denote64BitSize = false);
|
||||
static void seekBackAndWriteAtomSize(std::ostream &stream, const std::ostream::pos_type &startOffset);
|
||||
static void seekBackAndWriteAtomSize64(std::ostream &stream, const std::ostream::pos_type &startOffset);
|
||||
|
||||
protected:
|
||||
Mp4Atom(containerType& container, uint64 startOffset, uint64 maxSize);
|
||||
|
|
|
|||
|
|
@ -211,17 +211,17 @@ void Mp4Container::internalMakeFile()
|
|||
setStream(backupStream);
|
||||
// recreate original file
|
||||
outputStream.open(fileInfo().path(), ios_base::out | ios_base::binary | ios_base::trunc);
|
||||
// collect needed atoms
|
||||
// collect needed atoms from the original file
|
||||
Mp4Atom *ftypAtom, *pdinAtom, *moovAtom;
|
||||
try {
|
||||
ftypAtom = firstElement()->siblingById(Mp4AtomIds::FileType, true); // mandatory
|
||||
if(!ftypAtom) { // throw error if missing
|
||||
addNotification(NotificationType::Critical, "Mandatory ftyp atom not found.", context);
|
||||
addNotification(NotificationType::Critical, "Mandatory \"ftyp\"-atom not found.", context);
|
||||
}
|
||||
pdinAtom = firstElement()->siblingById(Mp4AtomIds::ProgressiveDownloadInformation, true); // not mandatory
|
||||
moovAtom = firstElement()->siblingById(Mp4AtomIds::Movie, true); // mandatory
|
||||
if(!moovAtom) { // throw error if missing
|
||||
addNotification(NotificationType::Critical, "Mandatory moov atom not found.", context);
|
||||
addNotification(NotificationType::Critical, "Mandatory \"moov\"-atom not found.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
} catch (Failure &) {
|
||||
|
|
@ -231,169 +231,212 @@ void Mp4Container::internalMakeFile()
|
|||
if(m_tags.size() > 1) {
|
||||
addNotification(NotificationType::Warning, "There are multiple MP4-tags assigned. Only the first one will be attached to the file.", context);
|
||||
}
|
||||
// write all top-level atoms, header boxes be placed first
|
||||
// write all top-level atoms
|
||||
updateStatus("Writing header ...");
|
||||
// write "ftype"-atom
|
||||
ftypAtom->copyEntirely(outputStream);
|
||||
// write "pdin"-atom ("progressive download information")
|
||||
if(pdinAtom) {
|
||||
pdinAtom->copyEntirely(outputStream);
|
||||
}
|
||||
ostream::pos_type newMoovOffset = outputStream.tellp();
|
||||
Mp4Atom *udtaAtom = nullptr;
|
||||
uint64 newUdtaOffset = 0u;
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
moovAtom->copyWithoutChilds(outputStream);
|
||||
for(Mp4Atom *moovChildAtom = moovAtom->firstChild(); moovChildAtom; moovChildAtom = moovChildAtom->nextSibling()) { // write child atoms manually, because the child udta has to be altered/ignored
|
||||
try {
|
||||
moovChildAtom->parse();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to parse childs of moov atom of original file.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
if(moovChildAtom->id() == Mp4AtomIds::UserData) {
|
||||
// found a udta (user data) atom which childs hold tag infromation
|
||||
if(!udtaAtom) {
|
||||
udtaAtom = moovChildAtom;
|
||||
// check if the udta atom needs to be written
|
||||
bool writeUdtaAtom = !m_tags.empty(); // it has to be written only when a MP4 tag is assigned
|
||||
if(!writeUdtaAtom) { // or when there is at least one child except the meta atom in the original file
|
||||
try {
|
||||
for(Mp4Atom *udtaChildAtom = udtaAtom->firstChild(); udtaChildAtom; udtaChildAtom = udtaChildAtom->nextSibling()) {
|
||||
udtaChildAtom->parse();
|
||||
if(udtaChildAtom->id() != Mp4AtomIds::Meta) {
|
||||
writeUdtaAtom = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning,
|
||||
"Unable to parse childs of udta atom of original file. These invalid/unknown atoms will be ignored.", context);
|
||||
}
|
||||
}
|
||||
if(writeUdtaAtom) {
|
||||
updateStatus("Writing tag information ...");
|
||||
newUdtaOffset = outputStream.tellp(); // save offset
|
||||
udtaAtom->copyHeader(outputStream); // and write header
|
||||
// write meta atom if there's a tag assigned
|
||||
if(!m_tags.empty()) {
|
||||
try {
|
||||
m_tags.front()->make(outputStream);
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "Unable to write meta atom (of assigned mp4 tag).", context);
|
||||
}
|
||||
addNotifications(*m_tags.front());
|
||||
}
|
||||
// write rest of the child atoms of udta atom
|
||||
try {
|
||||
for(Mp4Atom *udtaChildAtom = udtaAtom->firstChild(); udtaChildAtom; udtaChildAtom = udtaChildAtom->nextSibling()) {
|
||||
udtaChildAtom->parse();
|
||||
if(udtaChildAtom->id() != Mp4AtomIds::Meta) { // skip meta atoms here of course
|
||||
udtaChildAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning,
|
||||
"Unable to parse childs of udta atom of original file. These will be ignored.", context);
|
||||
}
|
||||
// write correct size of udta atom
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newUdtaOffset);
|
||||
}
|
||||
} else {
|
||||
addNotification(NotificationType::Warning, "The source file has multiple udta atoms. Surplus atoms will be ignored.", context);
|
||||
}
|
||||
} else if(!writeChunkByChunk || moovChildAtom->id() != Mp4AtomIds::Track) {
|
||||
// copy trak atoms only when not writing the data chunk-by-chunk
|
||||
moovChildAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// the original file has no udta atom but there is tag information to be written
|
||||
if(!udtaAtom && !m_tags.empty()) {
|
||||
updateStatus("Writing tag information ...");
|
||||
newUdtaOffset = outputStream.tellp();
|
||||
// write udta atom
|
||||
outputWriter.writeUInt32BE(0); // the size will be written later
|
||||
outputWriter.writeUInt32BE(Mp4AtomIds::UserData);
|
||||
// write tags
|
||||
try {
|
||||
m_tags.front()->make(outputStream);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newUdtaOffset);
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "Unable to write meta atom (of assigned mp4 tag).", context);
|
||||
outputStream.seekp(-8, ios_base::cur);
|
||||
}
|
||||
}
|
||||
// write trak atoms for each currently assigned track, this is only required when writing data chunk-by-chunk
|
||||
if(writeChunkByChunk) {
|
||||
updateStatus("Writing meta information for the tracks ...");
|
||||
for(auto &track : tracks()) {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
track->setOutputStream(outputStream);
|
||||
track->makeTrack();
|
||||
}
|
||||
}
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newMoovOffset);
|
||||
// prepare for writing the actual data
|
||||
vector<tuple<istream *, vector<uint64>, vector<uint64> > > trackInfos; // used when writing chunk-by-chunk
|
||||
uint64 totalChunkCount; // used when writing chunk-by-chunk
|
||||
uint64 totalChunkCount = 0; // used when writing chunk-by-chunk
|
||||
vector<int64> origMdatOffsets; // used when simply copying mdat
|
||||
vector<int64> newMdatOffsets; // used when simply copying mdat
|
||||
// write other atoms
|
||||
for(Mp4Atom *otherTopLevelAtom = firstElement(); otherTopLevelAtom; otherTopLevelAtom = otherTopLevelAtom->nextSibling()) {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
try {
|
||||
otherTopLevelAtom->parse();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to parse all top-level atoms of original file.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
using namespace Mp4AtomIds;
|
||||
switch(otherTopLevelAtom->id()) {
|
||||
case FileType: case ProgressiveDownloadInformation: case Movie: case Free: case Skip:
|
||||
break;
|
||||
case MediaData:
|
||||
auto trackCount = tracks().size();
|
||||
for(byte pass = 0; pass != 2; ++pass) {
|
||||
if(fileInfo().tagPosition() == (pass ? TagPosition::AfterData : TagPosition::BeforeData)) {
|
||||
// write "moov"-atom (contains track and tag information)
|
||||
ostream::pos_type newMoovOffset = outputStream.tellp();
|
||||
Mp4Atom *udtaAtom = nullptr;
|
||||
uint64 newUdtaOffset = 0u;
|
||||
// -> write child atoms manually, because the child "udta" has to be altered/ignored
|
||||
moovAtom->copyWithoutChilds(outputStream);
|
||||
for(Mp4Atom *moovChildAtom = moovAtom->firstChild(); moovChildAtom; moovChildAtom = moovChildAtom->nextSibling()) {
|
||||
try {
|
||||
moovChildAtom->parse();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to parse childs of moov atom of original file.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
if(moovChildAtom->id() == Mp4AtomIds::UserData) {
|
||||
// found a "udta" (user data) atom which child "meta" holds tag information
|
||||
if(!udtaAtom) {
|
||||
udtaAtom = moovChildAtom;
|
||||
// check whether the "udta"-atom needs to be written
|
||||
// it has to be written only when an MP4 tag is assigned
|
||||
bool writeUdtaAtom = !m_tags.empty();
|
||||
// or when there is at least one child except the meta atom in the original file
|
||||
if(!writeUdtaAtom) {
|
||||
try {
|
||||
for(Mp4Atom *udtaChildAtom = udtaAtom->firstChild(); udtaChildAtom; udtaChildAtom = udtaChildAtom->nextSibling()) {
|
||||
udtaChildAtom->parse();
|
||||
if(udtaChildAtom->id() != Mp4AtomIds::Meta) {
|
||||
writeUdtaAtom = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning,
|
||||
"Unable to parse childs of \"udta\"-atom atom of original file. These invalid/unknown atoms will be ignored.", context);
|
||||
}
|
||||
}
|
||||
if(writeUdtaAtom) {
|
||||
updateStatus("Writing tag information ...");
|
||||
newUdtaOffset = outputStream.tellp(); // save offset
|
||||
udtaAtom->copyHeader(outputStream); // and write header
|
||||
// write meta atom if there's a tag assigned
|
||||
if(!m_tags.empty()) {
|
||||
try {
|
||||
m_tags.front()->make(outputStream);
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "Unable to write meta atom (of assigned mp4 tag).", context);
|
||||
}
|
||||
addNotifications(*m_tags.front());
|
||||
}
|
||||
// write rest of the child atoms of "udta"-atom
|
||||
try {
|
||||
for(Mp4Atom *udtaChildAtom = udtaAtom->firstChild(); udtaChildAtom; udtaChildAtom = udtaChildAtom->nextSibling()) {
|
||||
udtaChildAtom->parse();
|
||||
// skip "meta"-atoms here of course
|
||||
if(udtaChildAtom->id() != Mp4AtomIds::Meta) {
|
||||
udtaChildAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning,
|
||||
"Unable to parse childs of \"udta\"-atom of original file. These will be ignored.", context);
|
||||
}
|
||||
// write correct size of udta atom
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newUdtaOffset);
|
||||
}
|
||||
} else {
|
||||
addNotification(NotificationType::Warning, "The source file has multiple \"udta\"-atoms. Surplus atoms will be ignored.", context);
|
||||
}
|
||||
} else if(!writeChunkByChunk || moovChildAtom->id() != Mp4AtomIds::Track) {
|
||||
// copy "trak"-atoms only when not writing the data chunk-by-chunk
|
||||
moovChildAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// -> the original file has no udta atom but there is tag information to be written
|
||||
if(!udtaAtom && !m_tags.empty()) {
|
||||
updateStatus("Writing tag information ...");
|
||||
newUdtaOffset = outputStream.tellp();
|
||||
// write udta atom
|
||||
outputWriter.writeUInt32BE(0); // the size will be written later
|
||||
outputWriter.writeUInt32BE(Mp4AtomIds::UserData);
|
||||
// write tags
|
||||
try {
|
||||
m_tags.front()->make(outputStream);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newUdtaOffset);
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "Unable to write meta atom (of assigned mp4 tag).", context);
|
||||
}
|
||||
}
|
||||
// -> write trak atoms for each currently assigned track (this is only required when writing data chunk-by-chunk)
|
||||
if(writeChunkByChunk) {
|
||||
break; // write actual data separately when writing chunk by chunk
|
||||
} else {
|
||||
// store the mdat offsets when not writing chunk by chunk to be able to update the stco tables
|
||||
origMdatOffsets.push_back(otherTopLevelAtom->startOffset());
|
||||
newMdatOffsets.push_back(outputStream.tellp());
|
||||
updateStatus("Writing meta information for the tracks ...");
|
||||
for(auto &track : tracks()) {
|
||||
track->setOutputStream(outputStream);
|
||||
track->makeTrack();
|
||||
}
|
||||
}
|
||||
default:
|
||||
updateStatus("Writing " + otherTopLevelAtom->idToString() + " atom ...");
|
||||
otherTopLevelAtom->forwardStatusUpdateCalls(this);
|
||||
otherTopLevelAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
// when writing chunk by chunk the actual data needs to be written separately
|
||||
if(writeChunkByChunk) {
|
||||
// get the chunk offset and the chunk size table from the old file to be able to write single chunks later ...
|
||||
updateStatus("Reading chunk offsets and sizes from the original file ...");
|
||||
trackInfos.reserve(tracks().size());
|
||||
totalChunkCount = 0;
|
||||
for(auto &track : tracks()) {
|
||||
if(&track->inputStream() == &outputStream) {
|
||||
track->setInputStream(backupStream); // ensure the track reads from the original file
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newMoovOffset);
|
||||
} else {
|
||||
// write other atoms and "mdat"-atom (holds actual data)
|
||||
for(Mp4Atom *otherTopLevelAtom = firstElement(); otherTopLevelAtom; otherTopLevelAtom = otherTopLevelAtom->nextSibling()) {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
try {
|
||||
otherTopLevelAtom->parse();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Critical, "Unable to parse all top-level atoms of original file.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
using namespace Mp4AtomIds;
|
||||
switch(otherTopLevelAtom->id()) {
|
||||
case FileType: case ProgressiveDownloadInformation: case Movie: case Free: case Skip:
|
||||
break;
|
||||
case MediaData:
|
||||
if(writeChunkByChunk) {
|
||||
break; // write actual data separately when writing chunk by chunk
|
||||
} else {
|
||||
// store the mdat offsets when not writing chunk by chunk to be able to update the stco tables
|
||||
origMdatOffsets.push_back(otherTopLevelAtom->startOffset());
|
||||
newMdatOffsets.push_back(outputStream.tellp());
|
||||
}
|
||||
default:
|
||||
updateStatus("Writing " + otherTopLevelAtom->idToString() + " atom ...");
|
||||
otherTopLevelAtom->forwardStatusUpdateCalls(this);
|
||||
otherTopLevelAtom->copyEntirely(outputStream);
|
||||
}
|
||||
}
|
||||
trackInfos.emplace_back(&track->inputStream(), track->readChunkOffsets(), track->readChunkSizes());
|
||||
const vector<uint64> &chunkOffsetTable = get<1>(trackInfos.back());
|
||||
const vector<uint64> &chunkSizesTable = get<2>(trackInfos.back());
|
||||
totalChunkCount += track->chunkCount();
|
||||
if(track->chunkCount() != chunkOffsetTable.size() || track->chunkCount() != chunkSizesTable.size()) {
|
||||
addNotification(NotificationType::Critical, "Chunks of track " + numberToString<uint64, string>(track->id()) + " could not be parsed correctly.", context);
|
||||
// when writing chunk by chunk the actual data needs to be written separately
|
||||
if(writeChunkByChunk) {
|
||||
// get the chunk offset and the chunk size table from the old file to be able to write single chunks later ...
|
||||
updateStatus("Reading chunk offsets and sizes from the original file ...");
|
||||
trackInfos.reserve(trackCount);
|
||||
for(auto &track : tracks()) {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
// ensure the track reads from the original file
|
||||
if(&track->inputStream() == &outputStream) {
|
||||
track->setInputStream(backupStream);
|
||||
}
|
||||
trackInfos.emplace_back(&track->inputStream(), track->readChunkOffsets(), track->readChunkSizes());
|
||||
const vector<uint64> &chunkOffsetTable = get<1>(trackInfos.back());
|
||||
const vector<uint64> &chunkSizesTable = get<2>(trackInfos.back());
|
||||
totalChunkCount += track->chunkCount();
|
||||
if(track->chunkCount() != chunkOffsetTable.size() || track->chunkCount() != chunkSizesTable.size()) {
|
||||
addNotification(NotificationType::Critical, "Chunks of track " + numberToString<uint64, string>(track->id()) + " could not be parsed correctly.", context);
|
||||
}
|
||||
}
|
||||
// writing single chunks is needed when tracks have been added or removed
|
||||
updateStatus("Writing chunks to mdat atom ...");
|
||||
//outputStream.seekp(0, ios_base::end);
|
||||
ostream::pos_type newMdatOffset = outputStream.tellp();
|
||||
writer().writeUInt32BE(1); // denote 64 bit size
|
||||
outputWriter.writeUInt32BE(Mp4AtomIds::MediaData);
|
||||
outputWriter.writeUInt64BE(0); // write size of mdat atom later
|
||||
CopyHelper<0x2000> copyHelper;
|
||||
uint64 chunkIndex = 0;
|
||||
uint64 totalChunksCopied = 0;
|
||||
bool chunksCopied;
|
||||
do {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
chunksCopied = false;
|
||||
for(size_t trackIndex = 0; trackIndex < trackCount; ++trackIndex) {
|
||||
//auto &track = tracks()[trackIndex];
|
||||
auto &trackInfo = trackInfos[trackIndex];
|
||||
istream &sourceStream = *get<0>(trackInfo);
|
||||
vector<uint64> &chunkOffsetTable = get<1>(trackInfo);
|
||||
const vector<uint64> &chunkSizesTable = get<2>(trackInfo);
|
||||
if(chunkIndex < chunkOffsetTable.size() && chunkIndex < chunkSizesTable.size()) {
|
||||
sourceStream.seekg(chunkOffsetTable[chunkIndex]);
|
||||
//outputStream.seekp(0, ios_base::end);
|
||||
chunkOffsetTable[chunkIndex] = outputStream.tellp();
|
||||
copyHelper.copy(sourceStream, outputStream, chunkSizesTable[chunkIndex]);
|
||||
//track->updateChunkOffset(chunkIndex, chunkOffset);
|
||||
chunksCopied = true;
|
||||
++totalChunksCopied;
|
||||
}
|
||||
}
|
||||
++chunkIndex;
|
||||
updatePercentage(static_cast<double>(totalChunksCopied) / totalChunkCount);
|
||||
} while(chunksCopied);
|
||||
//outputStream.seekp(0, ios_base::end);
|
||||
Mp4Atom::seekBackAndWriteAtomSize64(outputStream, newMdatOffset);
|
||||
}
|
||||
}
|
||||
}
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
// reparse what is written so far
|
||||
// reparse new file
|
||||
updateStatus("Reparsing output file ...");
|
||||
outputStream.close(); // the outputStream needs to be reopened to be able to read again
|
||||
outputStream.close(); // outputStream needs to be reopened to be able to read again
|
||||
outputStream.open(fileInfo().path(), ios_base::in | ios_base::out | ios_base::binary);
|
||||
setStream(outputStream);
|
||||
m_headerParsed = false;
|
||||
|
|
@ -406,54 +449,27 @@ void Mp4Container::internalMakeFile()
|
|||
addNotification(NotificationType::Critical, "Unable to reparse the header of the new file.", context);
|
||||
throw;
|
||||
}
|
||||
// update chunk offsets in the "stco"-atom of each track
|
||||
if(trackCount != tracks().size()) {
|
||||
stringstream error;
|
||||
error << "Unable to update chunk offsets (\"stco\"-atom): Number of tracks in the output file (" << tracks().size()
|
||||
<< ") differs from the number of tracks in the original file (" << trackCount << ").";
|
||||
addNotification(NotificationType::Critical, error.str(), context);
|
||||
throw Failure();
|
||||
}
|
||||
if(writeChunkByChunk) {
|
||||
// checking parsed tracks
|
||||
size_t trackCount = tracks().size();
|
||||
if(trackCount != trackInfos.size()) {
|
||||
if(trackCount > trackInfos.size()) {
|
||||
trackCount = trackInfos.size();
|
||||
updateStatus("Updating chunk offset table for each track ...");
|
||||
for(size_t trackIndex = 0; trackIndex < trackCount; ++trackIndex) {
|
||||
auto &track = tracks()[trackIndex];
|
||||
auto &chunkOffsetTable = get<1>(trackInfos[trackIndex]);
|
||||
if(track->chunkCount() == chunkOffsetTable.size()) {
|
||||
track->updateChunkOffsets(chunkOffsetTable);
|
||||
} else {
|
||||
addNotification(NotificationType::Critical, "Unable to update chunk offsets of track " + numberToString(trackIndex + 1) + ": Number of chunks in the output file differs from the number of chunks in the orignal file.", context);
|
||||
throw Failure();
|
||||
}
|
||||
addNotification(NotificationType::Critical, "The track meta data could not be written correctly. Trying to write the chunk data anyways.", context);
|
||||
}
|
||||
// writing single chunks is needed when tracks have been added or removed
|
||||
updateStatus("Writing chunks to mdat atom ...");
|
||||
outputStream.seekp(0, ios_base::end);
|
||||
ostream::pos_type newMdatOffset = outputStream.tellp();
|
||||
writer().writeUInt32BE(0); // denote 64 bit size
|
||||
writer().writeUInt32BE(Mp4AtomIds::MediaData);
|
||||
writer().writeUInt64BE(0); // write size of mdat atom later
|
||||
CopyHelper<0x2000> copyHelper;
|
||||
uint64 chunkIndex = 0;
|
||||
uint64 totalChunksCopied = 0;
|
||||
bool chunksCopied;
|
||||
do {
|
||||
if(isAborted()) {
|
||||
throw OperationAbortedException();
|
||||
}
|
||||
chunksCopied = false;
|
||||
for(size_t trackIndex = 0; trackIndex < trackCount; ++trackIndex) {
|
||||
auto &track = tracks()[trackIndex];
|
||||
auto &trackInfo = trackInfos[trackIndex];
|
||||
istream &sourceStream = *get<0>(trackInfo);
|
||||
const vector<uint64> &chunkOffsetTable = get<1>(trackInfo);
|
||||
const vector<uint64> &chunkSizesTable = get<2>(trackInfo);
|
||||
if(chunkIndex < chunkOffsetTable.size() && chunkIndex < chunkSizesTable.size()) {
|
||||
sourceStream.seekg(chunkOffsetTable[chunkIndex]);
|
||||
outputStream.seekp(0, ios_base::end);
|
||||
uint64 chunkOffset = outputStream.tellp();
|
||||
copyHelper.copy(sourceStream, outputStream, chunkSizesTable[chunkIndex]);
|
||||
track->updateChunkOffset(chunkIndex, chunkOffset);
|
||||
chunksCopied = true;
|
||||
++totalChunksCopied;
|
||||
}
|
||||
}
|
||||
++chunkIndex;
|
||||
updatePercentage(static_cast<double>(totalChunksCopied) / totalChunkCount);
|
||||
} while(chunksCopied);
|
||||
outputStream.seekp(0, ios_base::end);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream, newMdatOffset, true);
|
||||
} else {
|
||||
// correct mdat offsets in the stco atom of each track when we've just copied the mdat atom
|
||||
updateOffsets(origMdatOffsets, newMdatOffsets);
|
||||
}
|
||||
updatePercentage(100.0);
|
||||
|
|
@ -494,7 +510,7 @@ void Mp4Container::internalMakeFile()
|
|||
* \param oldMdatOffsets Specifies a vector holding the old offsets of the "mdat"-atoms.
|
||||
* \param newMdatOffsets Specifies a vector holding the new offsets of the "mdat"-atoms.
|
||||
*
|
||||
* Internally uses Mp4Track::updateOffsets(). Offsets stored in the "tfhd"-atom are also
|
||||
* Uses internally Mp4Track::updateOffsets(). Offsets stored in the "tfhd"-atom are also
|
||||
* updated (this is not tested yet since I don't have files using this atom).
|
||||
*
|
||||
* \throws Throws std::ios_base::failure when an IO error occurs.
|
||||
|
|
@ -510,7 +526,7 @@ void Mp4Container::updateOffsets(const std::vector<int64> &oldMdatOffsets, const
|
|||
addNotification(NotificationType::Critical, "No MP4 atoms could be found.", context);
|
||||
throw InvalidDataException();
|
||||
}
|
||||
// update "base-data-offset-present" of tfhd atom (NOT tested properly)
|
||||
// update "base-data-offset-present" of "tfhd"-atom (NOT tested properly)
|
||||
try {
|
||||
for(Mp4Atom *moofAtom = firstElement()->siblingById(Mp4AtomIds::MovieFragment, false);
|
||||
moofAtom; moofAtom = moofAtom->siblingById(Mp4AtomIds::MovieFragment, false)) {
|
||||
|
|
@ -574,14 +590,16 @@ void Mp4Container::updateOffsets(const std::vector<int64> &oldMdatOffsets, const
|
|||
try {
|
||||
track->parseHeader();
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "The chunk offsets of track " + track->name() + " couldn't be updated because the track seems to be invalid. The newly written file seems to be damaged.", context);
|
||||
addNotification(NotificationType::Warning, "The chunk offsets of track " + track->name() + " couldn't be updated because the track seems to be invalid..", context);
|
||||
throw;
|
||||
}
|
||||
}
|
||||
if(track->isHeaderValid()) {
|
||||
try {
|
||||
track->updateChunkOffsets(oldMdatOffsets, newMdatOffsets);
|
||||
} catch(Failure &) {
|
||||
addNotification(NotificationType::Warning, "The chunk offsets of track " + track->name() + " couldn't be updated. The altered file is damaged now, restore the backup!", context);
|
||||
addNotification(NotificationType::Warning, "The chunk offsets of track " + track->name() + " couldn't be updated.", context);
|
||||
throw;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -290,6 +290,9 @@ uint32 mpeg4SamplingFrequencyTable[] = {
|
|||
24000, 22050, 16000, 12000, 11025, 8000, 7350
|
||||
};
|
||||
|
||||
/*!
|
||||
* \brief Encapsulates all supported MPEG-4 channel configurations.
|
||||
*/
|
||||
namespace Mpeg4ChannelConfigs {
|
||||
|
||||
/*!
|
||||
|
|
|
|||
|
|
@ -780,8 +780,8 @@ std::unique_ptr<Mpeg4VideoSpecificConfig> Mp4Track::parseVideoSpecificConfig(Sta
|
|||
}
|
||||
|
||||
/*!
|
||||
* \brief Updates the chunk offsets of the track. This is necessary when the mdat atom (which contains
|
||||
* the actual chunk data) is moved.
|
||||
* \brief Updates the chunk offsets of the track. This is necessary when the "mdat"-atom
|
||||
* (which contains the actual chunk data) is moved.
|
||||
* \param oldMdatOffsets Specifies a vector holding the old offsets of the "mdat"-atoms.
|
||||
* \param newMdatOffsets Specifies a vector holding the new offsets of the "mdat"-atoms.
|
||||
*
|
||||
|
|
@ -849,10 +849,53 @@ void Mp4Track::updateChunkOffsets(const vector<int64> &oldMdatOffsets, const vec
|
|||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Updates the chunk offsets of the track. This is necessary when the "mdat"-atom
|
||||
* (which contains the actual chunk data) is moved.
|
||||
* \param chunkOffsets Specifies the new chunk offset table.
|
||||
*
|
||||
* \throws Throws InvalidDataException when
|
||||
* - there is no stream assigned.
|
||||
* - the header has been considered as invalid when parsing the header information.
|
||||
* - the size of \a chunkOffsets does not match chunkCount().
|
||||
* - there is no atom holding these offsets.
|
||||
* - the ID of the atom holding these offsets is not "stco" or "co64".
|
||||
*/
|
||||
void Mp4Track::updateChunkOffsets(const std::vector<uint64> &chunkOffsets)
|
||||
{
|
||||
if(!isHeaderValid() || !m_ostream || !m_istream || !m_stcoAtom) {
|
||||
throw InvalidDataException();
|
||||
}
|
||||
if(chunkOffsets.size() != chunkCount()) {
|
||||
throw InvalidDataException();
|
||||
}
|
||||
m_ostream->seekp(m_stcoAtom->dataOffset() + 8);
|
||||
switch(m_stcoAtom->id()) {
|
||||
case Mp4AtomIds::ChunkOffset:
|
||||
for(auto offset : chunkOffsets) {
|
||||
m_writer.writeUInt32BE(offset);
|
||||
}
|
||||
break;
|
||||
case Mp4AtomIds::ChunkOffset64:
|
||||
for(auto offset : chunkOffsets) {
|
||||
m_writer.writeUInt64BE(offset);
|
||||
}
|
||||
default:
|
||||
throw InvalidDataException();
|
||||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
* \brief Updates a particular chunk offset.
|
||||
* \param chunkIndex Specifies the index of the chunk offset to be updated.
|
||||
* \param offset Specifies the new chunk offset.
|
||||
* \remarks This method seems to be obsolete.
|
||||
* \throws Throws InvalidDataException when
|
||||
* - there is no stream assigned.
|
||||
* - the header has been considered as invalid when parsing the header information.
|
||||
* - \a chunkIndex is not less than chunkCount().
|
||||
* - there is no atom holding these offsets.
|
||||
* - the ID of the atom holding these offsets is not "stco" or "co64".
|
||||
*/
|
||||
void Mp4Track::updateChunkOffset(uint32 chunkIndex, uint64 offset)
|
||||
{
|
||||
|
|
@ -1006,7 +1049,7 @@ void Mp4Track::makeMedia()
|
|||
// write minf atom
|
||||
makeMediaInfo();
|
||||
// write size (of mdia atom)
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), mdiaStartOffset, false);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), mdiaStartOffset);
|
||||
}
|
||||
|
||||
/*!
|
||||
|
|
@ -1060,7 +1103,7 @@ void Mp4Track::makeMediaInfo()
|
|||
// write stbl atom
|
||||
makeSampleTable();
|
||||
// write size (of minf atom)
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), minfStartOffset, false);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), minfStartOffset);
|
||||
}
|
||||
|
||||
/*!
|
||||
|
|
@ -1123,7 +1166,7 @@ void Mp4Track::makeSampleTable()
|
|||
// write subs atom (sub-sample information)
|
||||
|
||||
// write size (of stbl atom)
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), stblStartOffset, false);
|
||||
Mp4Atom::seekBackAndWriteAtomSize(outputStream(), stblStartOffset);
|
||||
}
|
||||
|
||||
void Mp4Track::internalParseHeader()
|
||||
|
|
|
|||
|
|
@ -156,6 +156,7 @@ public:
|
|||
|
||||
// methods to update chunk offsets
|
||||
void updateChunkOffsets(const std::vector<int64> &oldMdatOffsets, const std::vector<int64> &newMdatOffsets);
|
||||
void updateChunkOffsets(const std::vector<uint64> &chunkOffsets);
|
||||
void updateChunkOffset(uint32 chunkIndex, uint64 offset);
|
||||
|
||||
protected:
|
||||
|
|
|
|||
Loading…
Reference in New Issue