Fix setting output/device for Xine and VLC backend

- Fixed setting output and device on Xine and VLC backend
- Fixed track slider for Xine, VLC and Phonon
- Improved backend settings to better support multiple backends
- Added group by samplerate and bitdepth in collection
- Fixed crash on exit when existing instance of the application is already runnung caused by NVIDIA driver
- Changed Q_OS_MAC to Q_OS_MACOS

src/engine/phononengine.cpp

@@ -1,29 +1,35 @@
-/* This file is part of Strawberry.
-
-   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/>.
-*/
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine
+ * Copyright 2017-2018, 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/>.
+ *
+ */
 
 #include "config.h"
 
 #include <QtGlobal>
+#include <QString>
 #include <QUrl>
 #include <QTimer>
 
 #include "phononengine.h"
 
-#include "core/logging.h"
+#include "core/timeconstants.h"
 #include "core/taskmanager.h"
+#include "core/logging.h"
 
 PhononEngine::PhononEngine(TaskManager *task_manager)
   : media_object_(new Phonon::MediaObject(this)),
@@ -66,7 +72,7 @@ bool PhononEngine::Load(const QUrl &url, Engine::TrackChangeFlags change, bool f
 bool PhononEngine::Play(quint64 offset_nanosec) {
 
   // The seek happens in PhononStateChanged - phonon doesn't seem to change currentTime() if we seek before we start playing :S
-  seek_offset_ = offset_nanosec;
+  seek_offset_ = (offset_nanosec / kNsecPerMsec);
 
   media_object_->play();
   return true;
@@ -113,7 +119,8 @@ uint PhononEngine::length() const {
 }
 
 void PhononEngine::Seek(quint64 offset_nanosec) {
-  media_object_->seek(offset_nanosec);
+  int offset = (offset_nanosec / kNsecPerMsec);
+  media_object_->seek(offset);
 }
 
 void PhononEngine::SetVolumeSW(uint volume) {
@@ -144,13 +151,34 @@ void PhononEngine::StateTimeoutExpired() {
 }
 
 qint64 PhononEngine::position_nanosec() const {
-    
-  return 0;
+  if (state() == Engine::Empty) return 0;
+  const qint64 result = (position() * kNsecPerMsec);
+  return qint64(qMax(0ll, result));
 
 }
 
 qint64 PhononEngine::length_nanosec() const {
-    
-  return 0;
-
+  if (state() == Engine::Empty) return 0;
+  const qint64 result = end_nanosec_ - beginning_nanosec_;
+  if (result > 0) {
+    return result;
+  }
+  else {
+    // Get the length from the pipeline if we don't know.
+    return (length() * kNsecPerMsec);
+  }
+}
+
+EngineBase::OutputDetailsList PhononEngine::GetOutputsList() const {
+  OutputDetailsList ret;
+  OutputDetails output;
+  output.name = "none";
+  output.description = "Configured by the system";
+  output.iconname = "soundcard";
+  ret << output;
+  return ret;
+}
+
+bool PhononEngine::CustomDeviceSupport(const QString &name) {
+  return false;
 }