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tagparser
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Improve warnings in Ogg parser further 

* Improve wording
* Check all pages the tag is contained by
* Check "continued"-flag as well
This commit is contained in:
Martchus 2024-06-16 21:36:10 +02:00
parent 43fac8cb67
commit ece59d54a9
2 changed files with 28 additions and 13 deletions
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36
ogg/oggcontainer.cpp
View File

@ -290,7 +290,7 @@ void OggContainer::internalParseTags(Diagnostics &diag, AbortableProgressFeedbac
m_iterator.setSegmentIndex(params.firstSegmentIndex);
m_iterator.setFilter(m_iterator.currentPage().streamSerialNumber());
const auto startOffset = m_iterator.startOffset();
const auto absGranPos = m_iterator.currentPage().absoluteGranulePosition();
const auto context = argsToString("parsing tag in Ogg page at ", startOffset);
switch (params.streamFormat) {
case GeneralMediaFormat::Vorbis:
comment->parse(m_iterator, flags, diag);
@ -305,22 +305,34 @@ void OggContainer::internalParseTags(Diagnostics &diag, AbortableProgressFeedbac
comment->parse(m_iterator, flags | VorbisCommentFlags::NoSignature | VorbisCommentFlags::NoFramingByte, diag);
break;
default:
diag.emplace_back(DiagLevel::Critical, "Stream format not supported.", argsToString("parsing tag in OGG file at ", startOffset));
diag.emplace_back(DiagLevel::Critical, "Stream format not supported.", context);
}
params.lastPageIndex = m_iterator.currentPageIndex();
params.lastSegmentIndex = m_iterator.currentSegmentIndex();
// do a few sanity checks on the continued-flag and absolute granule position as some Ogg demuxers are picky about them
static constexpr auto noPacketsFinishOnPage = std::numeric_limits<std::uint64_t>::max();
if (params.firstPageIndex != params.lastPageIndex) {
static constexpr auto noPacketsFinishOnPage = std::numeric_limits<std::uint64_t>::max();
if (const auto absGraPos2 = m_iterator.currentPage().absoluteGranulePosition();
absGranPos != noPacketsFinishOnPage || absGraPos2 == noPacketsFinishOnPage) {
const auto pos1 = absGranPos == noPacketsFinishOnPage ? "-1" : argsToString(absGranPos);
const auto pos2 = absGraPos2 == noPacketsFinishOnPage ? "-1" : argsToString(absGraPos2);
diag.emplace_back(DiagLevel::Warning,
argsToString("Tag spans over ", (params.lastPageIndex - params.firstPageIndex),
" pages but absolute granule position is not incremented as expected between those pages. The position the first page is ",
pos1, " (expected -1) and the position of the last page is ", pos2, " (must not be -1)\n"),
argsToString("parsing tag in OGG file at ", startOffset));
const auto pageCount = params.lastPageIndex - params.firstPageIndex;
for (auto i = params.firstPageIndex; i < params.lastPageIndex; ++i) {
if (const auto &page = m_iterator.pages()[i]; page.absoluteGranulePosition() != noPacketsFinishOnPage) {
diag.emplace_back(DiagLevel::Warning,
argsToString("Tag spans over ", pageCount, " pages but absolute granule position of unfinished page at ", page.startOffset(),
" is not set to \"-1\" (it is ", page.absoluteGranulePosition(), ")."),
context);
}
}
for (auto i = params.firstPageIndex + 1; i <= params.lastPageIndex; ++i) {
if (const auto &page = m_iterator.pages()[i]; !page.isContinued()) {
diag.emplace_back(DiagLevel::Warning,
argsToString("The tag is continued in Ogg page at ", page.startOffset(), " but this page is not marked as continued packet."),
context);
}
}
}
if (const auto &page = m_iterator.pages()[params.lastPageIndex]; page.absoluteGranulePosition() == noPacketsFinishOnPage) {
diag.emplace_back(
DiagLevel::Warning, argsToString("Absolute granule position of final page at ", page.startOffset(), " is set to \"-1\"."), context);
}
}
}

5
tests/overallogg.cpp
View File

@ -141,7 +141,10 @@ void OverallTests::checkOggTestfile3()
return startsWith(msg.message(), "3 bytes left in last segment");
}) != m_diag.end());
CPPUNIT_ASSERT(std::find_if(m_diag.begin(), m_diag.end(), [](const auto &msg) {
return startsWith(msg.message(), "Tag spans over 6 pages but absolute granule position is");
return startsWith(msg.message(), "Tag spans over 6 pages but absolute granule position of unfinished page at");
}) != m_diag.end());
CPPUNIT_ASSERT(std::find_if(m_diag.begin(), m_diag.end(), [](const auto &msg) {
return startsWith(msg.message(), "The tag is continued in Ogg page at");
}) != m_diag.end());
}