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Avoid some blocking calls to libtorrent

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This commit is contained in:
Vladimir Golovnev (Glassez) 2022-04-11 22:20:11 +03:00
parent 7377974731
commit bd45dc5d0f
1 changed files with 17 additions and 12 deletions
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29
src/base/bittorrent/torrentimpl.cpp
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@ -284,17 +284,18 @@ TorrentImpl::TorrentImpl(Session *session, lt::session *nativeSession
m_filePaths.reserve(filesCount);
m_indexMap.reserve(filesCount);
m_filePriorities.reserve(filesCount);
const std::shared_ptr<const lt::torrent_info> currentInfo = m_nativeHandle.torrent_file();
const lt::file_storage &fileStorage = currentInfo->files();
const std::vector<lt::download_priority_t> filePriorities =
resized(m_ltAddTorrentParams.file_priorities, fileStorage.num_files()
resized(m_ltAddTorrentParams.file_priorities, m_ltAddTorrentParams.ti->num_files()
, LT::toNative(m_ltAddTorrentParams.file_priorities.empty() ? DownloadPriority::Normal : DownloadPriority::Ignored));
for (int i = 0; i < filesCount; ++i)
{
const lt::file_index_t nativeIndex = m_torrentInfo.nativeIndexes().at(i);
m_indexMap[nativeIndex] = i;
const auto filePath = Path(fileStorage.file_path(nativeIndex)).removedExtension(QB_EXT);
const auto fileIter = m_ltAddTorrentParams.renamed_files.find(nativeIndex);
const Path filePath = ((fileIter != m_ltAddTorrentParams.renamed_files.end())
? Path(fileIter->second).removedExtension(QB_EXT) : m_torrentInfo.filePath(i));
m_filePaths.append(filePath);
const auto priority = LT::fromNative(filePriorities[LT::toUnderlyingType(nativeIndex)]);
@ -1465,7 +1466,7 @@ void TorrentImpl::applyFirstLastPiecePriority(const bool enabled)
// Download first and last pieces first for every file in the torrent
std::vector<lt::download_priority_t> piecePriorities = nativeHandle().get_piece_priorities();
auto piecePriorities = std::vector<lt::download_priority_t>(m_torrentInfo.piecesCount(), LT::toNative(DownloadPriority::Ignored));
// Updating file priorities is an async operation in libtorrent, when we just updated it and immediately query it
// we might get the old/wrong values, so we rely on `updatedFilePrio` in this case.
@ -1476,17 +1477,21 @@ void TorrentImpl::applyFirstLastPiecePriority(const bool enabled)
continue;
// Determine the priority to set
const DownloadPriority newPrio = enabled ? DownloadPriority::Maximum : filePrio;
const auto piecePrio = static_cast<lt::download_priority_t>(static_cast<int>(newPrio));
const TorrentInfo::PieceRange extremities = m_torrentInfo.filePieces(index);
const lt::download_priority_t piecePrio = LT::toNative(enabled ? DownloadPriority::Maximum : filePrio);
const TorrentInfo::PieceRange pieceRange = m_torrentInfo.filePieces(index);
// worst case: AVI index = 1% of total file size (at the end of the file)
const int nNumPieces = std::ceil(fileSize(index) * 0.01 / pieceLength());
for (int i = 0; i < nNumPieces; ++i)
const int numPieces = std::ceil(fileSize(index) * 0.01 / pieceLength());
for (int i = 0; i < numPieces; ++i)
{
piecePriorities[extremities.first() + i] = piecePrio;
piecePriorities[extremities.last() - i] = piecePrio;
piecePriorities[pieceRange.first() + i] = piecePrio;
piecePriorities[pieceRange.last() - i] = piecePrio;
}
const int firstPiece = pieceRange.first() + numPieces;
const int lastPiece = pieceRange.last() - numPieces;
for (int index = firstPiece; index <= lastPiece; ++index)
piecePriorities[index] = LT::toNative(filePrio);
}
m_nativeHandle.prioritize_pieces(piecePriorities);