Add lyrics from lyrics.ovh

src/lyrics/jsonlyricsprovider.h

@@ -0,0 +1,45 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef JSONLYRICSPROVIDER_H
+#define JSONLYRICSPROVIDER_H
+
+#include "config.h"
+
+#include <QObject>
+#include <QVariant>
+#include <QString>
+
+#include "lyricsprovider.h"
+
+class QNetworkReply;
+
+class JsonLyricsProvider : public LyricsProvider {
+  Q_OBJECT
+
+ public:
+  explicit JsonLyricsProvider(const QString &name, QObject *parent = nullptr);
+  QJsonObject ExtractJsonObj(QNetworkReply *reply, const quint64 id);
+
+ private:
+  virtual void Error(const quint64 id, const QString &error, QVariant debug = QVariant()) = 0;
+
+};
+
+#endif  // JSONLYRICSPROVIDER_H