Add Deezer support

src/engine/deezerengine.h

@@ -0,0 +1,88 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018, 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 DEEZERENGINE_H
+#define DEEZERENGINE_H
+
+#include "config.h"
+
+#include <stdbool.h>
+#include <deezer/deezer-connect.h>
+#include <deezer/deezer-player.h>
+
+#include <QtGlobal>
+#include <QObject>
+#include <QString>
+#include <QUrl>
+#include <QDateTime>
+
+#include "engine_fwd.h"
+#include "enginebase.h"
+
+class TaskManager;
+
+class DeezerEngine : public Engine::Base {
+  Q_OBJECT
+
+ public:
+  DeezerEngine(TaskManager *task_manager);
+  ~DeezerEngine();
+
+  bool Init();
+  Engine::State state() const { return state_; }
+  bool Load(const QUrl &media_url, const QUrl &original_url, Engine::TrackChangeFlags change, bool force_stop_at_end, quint64 beginning_nanosec, qint64 end_nanosec);
+  bool Play(quint64 offset_nanosec);
+  void Stop(bool stop_after = false);
+  void Pause();
+  void Unpause();
+  void Seek(quint64 offset_nanosec);
+ protected:
+  void SetVolumeSW(uint percent);
+ public:
+  virtual qint64 position_nanosec() const;
+  virtual qint64 length_nanosec() const;
+
+  OutputDetailsList GetOutputsList() const;
+  bool ValidOutput(const QString &output);
+  QString DefaultOutput() { return ""; }
+  bool CustomDeviceSupport(const QString &output);
+  bool ALSADeviceSupport(const QString &output);
+
+ private:
+  Engine::State state_;
+  dz_connect_handle connect_;
+  dz_player_handle player_;
+  QString access_token_;
+  QDateTime expiry_time_;
+  qint64 position_;
+
+  bool Initialised() const;
+  bool CanDecode(const QUrl &url);
+
+  static void ConnectEventCallback(dz_connect_handle handle, dz_connect_event_handle event, void *delegate);
+  static void PlayerEventCallback(dz_player_handle handle, dz_player_event_handle event, void *supervisor);
+  static void PlayerMetaDataCallback(dz_player_handle handle, dz_track_metadata_handle metadata, void *userdata);
+  static void PlayerProgressCallback(dz_player_handle handle, dz_useconds_t progress, void *userdata);
+
+ public slots:
+  void LoadAccessToken();
+
+};
+
+#endif