video: disable stream selection when irrelevant

lib/widgets/viewer/overlay/bottom/video.dart

@@ -14,6 +14,7 @@ import 'package:aves/widgets/common/fx/blurred.dart';
 import 'package:aves/widgets/common/fx/borders.dart';
 import 'package:aves/widgets/viewer/overlay/common.dart';
 import 'package:aves/widgets/viewer/video/controller.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:provider/provider.dart';
@@ -237,6 +238,21 @@ class _ButtonRow extends StatelessWidget {
   Widget _buildOverlayButton(BuildContext context, VideoAction action) {
     late Widget child;
     void onPressed() => onActionSelected(action);
+
+    ValueListenableBuilder<bool> _buildFromListenable(ValueListenable<bool>? enabledNotifier) {
+      return ValueListenableBuilder<bool>(
+        valueListenable: enabledNotifier ?? ValueNotifier(false),
+        builder: (context, canDo, child) {
+          return IconButton(
+            icon: child!,
+            onPressed: canDo ? onPressed : null,
+            tooltip: action.getText(context),
+          );
+        },
+        child: Icon(action.getIcon()),
+      );
+    }
+
     switch (action) {
       case VideoAction.togglePlay:
         child = _PlayToggler(
@@ -245,20 +261,12 @@ class _ButtonRow extends StatelessWidget {
         );
         break;
       case VideoAction.captureFrame:
-        child = ValueListenableBuilder<bool>(
-          valueListenable: controller?.renderingVideoNotifier ?? ValueNotifier(false),
-          builder: (context, canDo, child) {
-            return IconButton(
-              icon: child!,
-              onPressed: canDo ? onPressed : null,
-              tooltip: action.getText(context),
-            );
-          },
-          child: Icon(action.getIcon()),
-        );
+        child = _buildFromListenable(controller?.renderingVideoNotifier);
+        break;
+      case VideoAction.selectStreams:
+        child = _buildFromListenable(controller?.canSelectStreamNotifier);
         break;
       case VideoAction.replay10:
-      case VideoAction.selectStreams:
       case VideoAction.setSpeed:
         child = IconButton(
           icon: Icon(action.getIcon()),
@@ -277,7 +285,21 @@ class _ButtonRow extends StatelessWidget {
   }
 
   PopupMenuEntry<VideoAction> _buildPopupMenuItem(BuildContext context, VideoAction action) {
-    var enabled = true;
+    late final enabled;
+    switch (action) {
+      case VideoAction.togglePlay:
+      case VideoAction.replay10:
+      case VideoAction.setSpeed:
+        enabled = true;
+        break;
+      case VideoAction.captureFrame:
+        enabled = controller?.renderingVideoNotifier.value ?? false;
+        break;
+      case VideoAction.selectStreams:
+        enabled = controller?.canSelectStreamNotifier.value ?? false;
+        break;
+    }
+
     Widget? child;
     switch (action) {
       case VideoAction.togglePlay:
@@ -287,15 +309,13 @@ class _ButtonRow extends StatelessWidget {
         );
         break;
       case VideoAction.captureFrame:
-        enabled = controller?.renderingVideoNotifier.value ?? false;
-        child = MenuRow(text: action.getText(context), icon: action.getIcon());
-        break;
       case VideoAction.replay10:
       case VideoAction.selectStreams:
       case VideoAction.setSpeed:
         child = MenuRow(text: action.getText(context), icon: action.getIcon());
         break;
     }
+
     return PopupMenuItem(
       value: action,
       enabled: enabled,

lib/widgets/viewer/video/controller.dart

@@ -27,8 +27,6 @@ abstract class AvesVideoController {
 
   Stream<VideoStatus> get statusStream;
 
-  ValueNotifier<bool> get renderingVideoNotifier;
-
   bool get isReady;
 
   bool get isPlaying => status == VideoStatus.playing;
@@ -43,6 +41,10 @@ abstract class AvesVideoController {
 
   Stream<String?> get timedTextStream;
 
+  ValueNotifier<bool> get renderingVideoNotifier;
+
+  ValueNotifier<bool> get canSelectStreamNotifier;
+
   ValueNotifier<double> get sarNotifier;
 
   double get speed;
@@ -57,7 +59,7 @@ abstract class AvesVideoController {
 
   Future<StreamSummary?> getSelectedStream(StreamType type);
 
-  Map<StreamSummary, bool> get streams;
+  List<StreamSummary> get streams;
 
   Future<Uint8List> captureFrame();
 

lib/widgets/viewer/video/fijkplayer.dart

@@ -23,9 +23,6 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
   final AChangeNotifier _completedNotifier = AChangeNotifier();
   Offset _macroBlockCrop = Offset.zero;
   final List<StreamSummary> _streams = [];
-  final ValueNotifier<StreamSummary?> _selectedVideoStream = ValueNotifier(null);
-  final ValueNotifier<StreamSummary?> _selectedAudioStream = ValueNotifier(null);
-  final ValueNotifier<StreamSummary?> _selectedTextStream = ValueNotifier(null);
   Timer? _initialPlayTimer;
   double _speed = 1;
 
@@ -41,6 +38,9 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
   @override
   final ValueNotifier<bool> renderingVideoNotifier = ValueNotifier(false);
 
+  @override
+  final ValueNotifier<bool> canSelectStreamNotifier = ValueNotifier(false);
+
   @override
   final ValueNotifier<double> sarNotifier = ValueNotifier(1);
 
@@ -177,10 +177,12 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
     _instance.applyOptions(options);
   }
 
-  void _fetchSelectedStreams() async {
+  void _fetchStreams() async {
     final mediaInfo = await _instance.getInfo();
     if (!mediaInfo.containsKey(Keys.streams)) return;
 
+    var videoStreamCount = 0, audioStreamCount = 0, textStreamCount = 0;
+
     _streams.clear();
     final allStreams = (mediaInfo[Keys.streams] as List).cast<Map>();
     allStreams.forEach((stream) {
@@ -195,26 +197,25 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
           width: stream[Keys.width] as int?,
           height: stream[Keys.height] as int?,
         ));
+        switch (type) {
+          case StreamType.video:
+            videoStreamCount++;
+            break;
+          case StreamType.audio:
+            audioStreamCount++;
+            break;
+          case StreamType.text:
+            textStreamCount++;
+            break;
+        }
       }
     });
 
-    StreamSummary? _getSelectedStream(String selectedIndexKey) {
-      final indexString = mediaInfo[selectedIndexKey];
-      if (indexString != null) {
-        final index = int.tryParse(indexString);
-        if (index != null && index != -1) {
-          return _streams.firstWhereOrNull((stream) => stream.index == index);
-        }
-      }
-      return null;
-    }
+    canSelectStreamNotifier.value = videoStreamCount > 1 || audioStreamCount > 1 || textStreamCount > 0;
 
-    _selectedVideoStream.value = _getSelectedStream(Keys.selectedVideoStream);
-    _selectedAudioStream.value = _getSelectedStream(Keys.selectedAudioStream);
-    _selectedTextStream.value = _getSelectedStream(Keys.selectedTextStream);
-
-    if (_selectedVideoStream.value != null) {
-      final streamIndex = _selectedVideoStream.value!.index;
+    final selectedVideo = await getSelectedStream(StreamType.video);
+    if (selectedVideo != null) {
+      final streamIndex = selectedVideo.index;
       final streamInfo = allStreams.firstWhereOrNull((stream) => stream[Keys.index] == streamIndex);
       if (streamInfo != null) {
         final num = streamInfo[Keys.sarNum] ?? 0;
@@ -226,7 +227,7 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
 
   void _onValueChanged() {
     if (_instance.state == FijkState.prepared && _streams.isEmpty) {
-      _fetchSelectedStreams();
+      _fetchStreams();
     }
     _valueStreamController.add(_instance.value);
   }
@@ -301,17 +302,6 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
   // TODO TLAD [video] bug: setting speed fails when there is no audio stream or audio is disabled
   void _applySpeed() => _instance.setSpeed(speed);
 
-  ValueNotifier<StreamSummary?> selectedStreamNotifier(StreamType type) {
-    switch (type) {
-      case StreamType.video:
-        return _selectedVideoStream;
-      case StreamType.audio:
-        return _selectedAudioStream;
-      case StreamType.text:
-        return _selectedTextStream;
-    }
-  }
-
   // When a stream is selected, the video accelerates to catch up with it.
   // The duration of this acceleration phase depends on the player `min-frames` parameter.
   // Calling `seekTo` after stream de/selection is a workaround to:
@@ -325,11 +315,9 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
         final newIndex = selected.index;
         if (newIndex != null) {
           await _instance.selectTrack(newIndex);
-          selectedStreamNotifier(type).value = selected;
         }
       } else if (current != null) {
         await _instance.deselectTrack(current.index!);
-        selectedStreamNotifier(type).value = null;
       }
       await seekTo(currentPosition);
     }
@@ -342,10 +330,7 @@ class IjkPlayerAvesVideoController extends AvesVideoController {
   }
 
   @override
-  Map<StreamSummary, bool> get streams {
-    final selectedIndices = {_selectedVideoStream, _selectedAudioStream, _selectedTextStream}.map((v) => v.value?.index).toSet();
-    return Map.fromEntries(_streams.map((stream) => MapEntry(stream, selectedIndices.contains(stream.index))));
-  }
+  List<StreamSummary> get streams => _streams;
 
   @override
   Future<Uint8List> captureFrame() {

lib/widgets/viewer/video_action_delegate.dart

@@ -120,17 +120,20 @@ class VideoActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMix
   }
 
   Future<void> _showStreamSelectionDialog(BuildContext context, AvesVideoController controller) async {
-    final selectedStreams = await showDialog<Map<StreamType, StreamSummary>>(
+    final streams = controller.streams;
+    final currentSelectedStreams = await Future.wait(StreamType.values.map(controller.getSelectedStream));
+    final currentSelectedIndices = currentSelectedStreams.where((v) => v != null).cast<StreamSummary>().map((v) => v.index).toSet();
+
+    final userSelectedStreams = await showDialog<Map<StreamType, StreamSummary>>(
       context: context,
       builder: (context) => VideoStreamSelectionDialog(
-        streams: controller.streams,
+        streams: Map.fromEntries(streams.map((stream) => MapEntry(stream, currentSelectedIndices.contains(stream.index)))),
       ),
     );
-    if (selectedStreams == null || selectedStreams.isEmpty) return;
+    if (userSelectedStreams == null || userSelectedStreams.isEmpty) return;
 
-    // TODO TLAD [video] get stream list & guess default selected streams, when the controller is not initialized yet
     await Future.forEach<MapEntry<StreamType, StreamSummary>>(
-      selectedStreams.entries,
+      userSelectedStreams.entries,
       (kv) => controller.selectStream(kv.key, kv.value),
     );
   }