Add user-configurable playback settings

* PlaybackManager has been updated to workaround limitiations in
  QtMultimedia
* PlaybackManager now sends the DeviceProfile to the server when
  determining the playback url. This makes the Jellyfin server send
  information back about transcoding.
* The DeviceProfile type has been changed from an QJsonObject into the
  DTO generated by the OpenAPI descripton.
* A settings page has been added on SailfishOS that allows the user to
  configure the PlaybackManager to their whishes.
* The DebugInfo page on SailfishOS now persists its settings (closes #8)

sailfish/qml/components/VideoPlayer.qml

@@ -69,12 +69,23 @@ SilicaItem {
     }
 
     Label {
+        readonly property string _playbackMethod: {
+            switch(manager.playMethod) {
+            case J.PlaybackManager.DirectPlay:
+                return"Direct Play"
+            case J.PlaybackManager.Transcoding:
+                return "Transcoding"
+            case J.PlaybackManager.DirectStream:
+                return "Direct Stream"
+            default:
+                return "Unknown playback method"
+            }
+        }
         anchors.fill: parent
         anchors.margins: Theme.horizontalPageMargin
         text: item.jellyfinId + "\n" + appWindow.playbackManager.streamUrl + "\n"
-          + (manager.playMethod === J.PlaybackManager.DirectPlay ? "Direct Play" : "Transcoding") + "\n"
-          + manager.position + "\n"
-          + manager.mediaStatus + "\n"
+          + "Playback method: " + _playbackMethod + "\n"
+          + "Media status: " + manager.mediaStatus + "\n"
           // + player.bufferProgress + "\n"
           // + player.metaData.videoCodec + "@" + player.metaData.videoFrameRate + "(" + player.metaData.videoBitRate + ")" + "\n"
           // + player.metaData.audioCodec + "(" + player.metaData.audioBitRate + ")" + "\n"

sailfish/qml/harbour-sailfin.qml

@@ -22,6 +22,7 @@ import Sailfish.Silica 1.0
 import QtMultimedia 5.6
 import nl.netsoj.chris.Jellyfin 1.0
 
+import Nemo.Configuration 1.0
 import Nemo.Notifications 1.0
 import Nemo.KeepAlive 1.2
 
@@ -41,9 +42,10 @@ ApplicationWindow {
     property var itemData: pageStack.currentPage.itemData
 
     // Bad way to implement settings, but it'll do for now.
-    property bool showDebugInfo: true
+    property alias showDebugInfo: config.showDebugInfo
     property bool _hidePlaybackBar: false
 
+
     bottomMargin: playbackBar.visibleSize
     ApiClient {
         id: _apiClient
@@ -132,6 +134,12 @@ ApplicationWindow {
         Component.onCompleted: playbackBar.parent = __silica_applicationwindow_instance._rotatingItem
     }
 
+    ConfigurationGroup {
+        id: config
+        path: "/nl/netsoj/chris/Sailfin"
+        property bool showDebugInfo: false
+    }
+
     //FIXME: proper error handling
     Connections {
         target: apiClient

sailfish/qml/pages/SettingsPage.qml

@@ -117,6 +117,13 @@ Page {
                 text: qsTr("Other")
             }
 
+            IconListItem {
+                //: Settings list item for settings related to streaming
+                text: qsTr("Streaming settings")
+                iconSource: "image://theme/icon-m-cloud-download"
+                onClicked: pageStack.push(Qt.resolvedUrl("settings/StreamingPage.qml"))
+            }
+
             IconListItem {
                 //: Debug information settings menu itemy
                 text: qsTr("Debug information")

sailfish/qml/pages/settings/DebugPage.qml

@@ -18,6 +18,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 import QtQuick 2.6
 import Sailfish.Silica 1.0
+import Nemo.Configuration 1.0
 
 import nl.netsoj.chris.Jellyfin 1.0 as J
 
@@ -30,6 +31,12 @@ Page {
     // The effective value will be restricted by ApplicationWindow.allowedOrientations
     allowedOrientations: Orientation.All
 
+    ConfigurationGroup {
+        id: config
+        path: "/nl/netsoj/chris/Sailfin"
+        property bool showDebugInfo: false
+    }
+
     SilicaFlickable {
         anchors.fill: parent
         contentHeight: content.height
@@ -42,8 +49,8 @@ Page {
 
             TextSwitch {
                 text: qsTr("Show debug information")
-                checked: appWindow.showDebugInfo
-                onCheckedChanged: appWindow.showDebugInfo = checked
+                checked: config.showDebugInfo
+                onCheckedChanged: config.showDebugInfo = checked
             }
 
             SectionHeader {

sailfish/qml/pages/settings/StreamingPage.qml

@@ -0,0 +1,67 @@
+/*
+Sailfin: a Jellyfin client written using Qt
+Copyright (C) 2021 Chris Josten
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+import QtQuick 2.6
+import Sailfish.Silica 1.0
+
+import nl.netsoj.chris.Jellyfin 1.0 as J
+
+import "../../components"
+import "../.."
+
+Page {
+    id: page
+
+    // The effective value will be restricted by ApplicationWindow.allowedOrientations
+    allowedOrientations: Orientation.All
+
+    SilicaFlickable {
+        anchors.fill: parent
+        contentHeight: content.height
+
+        Column {
+            id: content
+            width: parent.width
+
+            PageHeader {
+                title: qsTr("Streaming settings")
+            }
+
+            TextSwitch {
+                text: qsTr("Allow transcoding")
+                description: qsTr("If enabled, Sailfin may request the Jellyfin server " +
+                                  "to transcode media to a more suitable media format for this device. " +
+                                  "It is recommended to leave this enabled unless your server is weak.")
+                checked: appWindow.apiClient.settings.allowTranscoding
+                onCheckedChanged: appWindow.apiClient.settings.allowTranscoding = checked
+            }
+
+            Slider {
+                minimumValue: 0
+                maximumValue: 64 * 1024 * 1024
+                stepSize:  1024 * 128
+                valueText: qsTr("%1 mbps").arg((value / 1024 / 1024).toPrecision(4))
+                value: appWindow.apiClient.settings.maxStreamingBitRate
+                onDownChanged: if (!down) appWindow.apiClient.settings.maxStreamingBitRate = value
+                label: qsTr("Maximum streaming bitrate")
+                width: parent.width
+            }
+        }
+    }
+
+}