Clementine-audio-player-Mac.../ext/libclementine-tagreader/cloudstream.h

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/* This file is part of Clementine.
Copyright 2012, David Sansome <me@davidsansome.com>
Clementine is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Clementine is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GOOGLEDRIVESTREAM_H
#define GOOGLEDRIVESTREAM_H
#include <QObject>
#include <QList>
#include <QSslError>
#include <QUrl>
#include <google/sparsetable>
#include <taglib/tiostream.h>
class QNetworkAccessManager;
class CloudStream : public QObject, public TagLib::IOStream {
Q_OBJECT
public:
CloudStream(const QUrl& url, const QString& filename, const long length,
const QString& auth, QNetworkAccessManager* network);
// Taglib::IOStream
virtual TagLib::FileName name() const;
virtual TagLib::ByteVector readBlock(ulong length);
virtual void writeBlock(const TagLib::ByteVector&);
virtual void insert(const TagLib::ByteVector&, ulong, ulong);
virtual void removeBlock(ulong, ulong);
virtual bool readOnly() const;
virtual bool isOpen() const;
virtual void seek(long offset, TagLib::IOStream::Position p);
virtual void clear();
virtual long tell() const;
virtual long length();
virtual void truncate(long);
google::sparsetable<char>::size_type cached_bytes() const {
return cache_.num_nonempty();
}
int num_requests() const { return num_requests_; }
// Use educated guess to request the bytes that TagLib will probably want.
void Precache();
private:
bool CheckCache(int start, int end);
void FillCache(int start, TagLib::ByteVector data);
TagLib::ByteVector GetCached(int start, int end);
private slots:
void SSLErrors(const QList<QSslError>& errors);
private:
const QUrl url_;
const QString filename_;
const QByteArray encoded_filename_;
const ulong length_;
const QString auth_;
int cursor_;
QNetworkAccessManager* network_;
google::sparsetable<char> cache_;
int num_requests_;
};
#endif // GOOGLEDRIVESTREAM_H