[camerax] Wrap classes to implement resolution configuration for video capture

packages/camera/camera_android_camerax/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.0+13
+
+* Wraps classes needed to implement resolution configuration for video recording.
+
 ## 0.5.0+12
 
 * Wraps classes needed to implement resolution configuration for image capture, image analysis, and preview.

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/CameraAndroidCameraxPlugin.java

@@ -103,6 +103,10 @@ public void setUp(
         binaryMessenger, new ResolutionStrategyHostApiImpl(instanceManager));
     GeneratedCameraXLibrary.AspectRatioStrategyHostApi.setup(
         binaryMessenger, new AspectRatioStrategyHostApiImpl(instanceManager));
+    GeneratedCameraXLibrary.FallbackStrategyHostApi.setup(
+        binaryMessenger, new FallbackStrategyHostApiImpl(instanceManager));
+    GeneratedCameraXLibrary.QualitySelectorHostApi.setup(
+        binaryMessenger, new QualitySelectorHostApiImpl(instanceManager));
   }
 
   @Override

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/FallbackStrategyHostApiImpl.java

@@ -0,0 +1,84 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package io.flutter.plugins.camerax;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+import androidx.camera.video.FallbackStrategy;
+import androidx.camera.video.Quality;
+import io.flutter.plugins.camerax.GeneratedCameraXLibrary.FallbackStrategyHostApi;
+import io.flutter.plugins.camerax.GeneratedCameraXLibrary.VideoQualityConstraint;
+import io.flutter.plugins.camerax.GeneratedCameraXLibrary.VideoResolutionFallbackRule;
+
+/**
+ * Host API implementation for {@link FallbackStrategy}.
+ *
+ * <p>This class may handle instantiating and adding native object instances that are attached to a
+ * Dart instance or handle method calls on the associated native class or an instance of the class.
+ */
+public class FallbackStrategyHostApiImpl implements FallbackStrategyHostApi {
+  private final InstanceManager instanceManager;
+
+  private final FallbackStrategyProxy proxy;
+
+  /** Proxy for constructors and static method of {@link FallbackStrategy}. */
+  @VisibleForTesting
+  public static class FallbackStrategyProxy {
+    /** Creates an instance of {@link FallbackStrategy}. */
+    public @NonNull FallbackStrategy create(
+        @NonNull VideoQualityConstraint videoQualityConstraint,
+        @NonNull VideoResolutionFallbackRule fallbackRule) {
+      Quality videoQuality =
+          QualitySelectorHostApiImpl.getQualityFromVideoQualityConstraint(videoQualityConstraint);
+
+      switch (fallbackRule) {
+        case HIGHER_QUALITY_OR_LOWER_THAN:
+          return FallbackStrategy.higherQualityOrLowerThan(videoQuality);
+        case HIGHER_QUALITY_THAN:
+          return FallbackStrategy.higherQualityThan(videoQuality);
+        case LOWER_QUALITY_OR_HIGHER_THAN:
+          return FallbackStrategy.lowerQualityOrHigherThan(videoQuality);
+        case LOWER_QUALITY_THAN:
+          return FallbackStrategy.lowerQualityThan(videoQuality);
+      }
+      throw new IllegalArgumentException(
+          "Specified fallback rule " + fallbackRule + " unrecognized.");
+    }
+  }
+
+  /**
+   * Constructs a {@link FallbackStrategyHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   */
+  public FallbackStrategyHostApiImpl(@NonNull InstanceManager instanceManager) {
+    this(instanceManager, new FallbackStrategyProxy());
+  }
+
+  /**
+   * Constructs a {@link FallbackStrategyHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   * @param proxy proxy for constructors and static method of {@link FallbackStrategy}
+   */
+  FallbackStrategyHostApiImpl(
+      @NonNull InstanceManager instanceManager, @NonNull FallbackStrategyProxy proxy) {
+    this.instanceManager = instanceManager;
+    this.proxy = proxy;
+  }
+
+  /**
+   * Creates an {@link FallbackStrategy} instance with the video quality and fallback rule
+   * specified.
+   */
+  @Override
+  public void create(
+      @NonNull Long identifier,
+      @NonNull VideoQualityConstraint videoQualityConstraint,
+      @NonNull VideoResolutionFallbackRule fallbackRule) {
+    instanceManager.addDartCreatedInstance(
+        proxy.create(videoQualityConstraint, fallbackRule), identifier);
+  }
+}

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/GeneratedCameraXLibrary.java

@@ -104,6 +104,43 @@ private LiveDataSupportedType(final int index) {
     }
   }
 
+  /**
+   * Video quality constraints that will be used by a QualitySelector to choose an appropriate video
+   * resolution.
+   *
+   * <p>These are pre-defined quality constants that are universally used for video.
+   *
+   * <p>See https://developer.android.com/reference/androidx/camera/video/Quality.
+   */
+  public enum VideoQualityConstraint {
+    SD(0),
+    HD(1),
+    FHD(2),
+    UHD(3),
+    LOWEST(4),
+    HIGHEST(5);
+
+    final int index;
+
+    private VideoQualityConstraint(final int index) {
+      this.index = index;
+    }
+  }
+
+  /** Fallback rules for selecting video resolution. */
+  public enum VideoResolutionFallbackRule {
+    HIGHER_QUALITY_OR_LOWER_THAN(0),
+    HIGHER_QUALITY_THAN(1),
+    LOWER_QUALITY_OR_HIGHER_THAN(2),
+    LOWER_QUALITY_THAN(3);
+
+    final int index;
+
+    private VideoResolutionFallbackRule(final int index) {
+      this.index = index;
+    }
+  }
+
   /** Generated class from Pigeon that represents data sent in messages. */
   public static final class ResolutionInfo {
     private @NonNull Long width;
@@ -1556,7 +1593,11 @@ public void create(@NonNull Long identifierArg, @NonNull Reply<Void> callback) {
   /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
   public interface RecorderHostApi {
 
-    void create(@NonNull Long identifier, @Nullable Long aspectRatio, @Nullable Long bitRate);
+    void create(
+        @NonNull Long identifier,
+        @Nullable Long aspectRatio,
+        @Nullable Long bitRate,
+        @Nullable Long qualitySelectorId);
 
     @NonNull
     Long getAspectRatio(@NonNull Long identifier);
@@ -1587,11 +1628,13 @@ static void setup(@NonNull BinaryMessenger binaryMessenger, @Nullable RecorderHo
                 Number identifierArg = (Number) args.get(0);
                 Number aspectRatioArg = (Number) args.get(1);
                 Number bitRateArg = (Number) args.get(2);
+                Number qualitySelectorIdArg = (Number) args.get(3);
                 try {
                   api.create(
                       (identifierArg == null) ? null : identifierArg.longValue(),
                       (aspectRatioArg == null) ? null : aspectRatioArg.longValue(),
-                      (bitRateArg == null) ? null : bitRateArg.longValue());
+                      (bitRateArg == null) ? null : bitRateArg.longValue(),
+                      (qualitySelectorIdArg == null) ? null : qualitySelectorIdArg.longValue());
                   wrapped.add(0, null);
                 } catch (Throwable exception) {
                   ArrayList<Object> wrappedError = wrapError(exception);
@@ -2937,4 +2980,165 @@ public void create(
           channelReply -> callback.reply(null));
     }
   }
+
+  private static class QualitySelectorHostApiCodec extends StandardMessageCodec {
+    public static final QualitySelectorHostApiCodec INSTANCE = new QualitySelectorHostApiCodec();
+
+    private QualitySelectorHostApiCodec() {}
+
+    @Override
+    protected Object readValueOfType(byte type, @NonNull ByteBuffer buffer) {
+      switch (type) {
+        case (byte) 128:
+          return ResolutionInfo.fromList((ArrayList<Object>) readValue(buffer));
+        default:
+          return super.readValueOfType(type, buffer);
+      }
+    }
+
+    @Override
+    protected void writeValue(@NonNull ByteArrayOutputStream stream, Object value) {
+      if (value instanceof ResolutionInfo) {
+        stream.write(128);
+        writeValue(stream, ((ResolutionInfo) value).toList());
+      } else {
+        super.writeValue(stream, value);
+      }
+    }
+  }
+
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
+  public interface QualitySelectorHostApi {
+
+    void create(
+        @NonNull Long identifier,
+        @NonNull List<Long> videoQualityConstraintIndexList,
+        @Nullable Long fallbackStrategyId);
+
+    @NonNull
+    ResolutionInfo getResolution(
+        @NonNull Long cameraInfoId, @NonNull VideoQualityConstraint quality);
+
+    /** The codec used by QualitySelectorHostApi. */
+    static @NonNull MessageCodec<Object> getCodec() {
+      return QualitySelectorHostApiCodec.INSTANCE;
+    }
+    /**
+     * Sets up an instance of `QualitySelectorHostApi` to handle messages through the
+     * `binaryMessenger`.
+     */
+    static void setup(
+        @NonNull BinaryMessenger binaryMessenger, @Nullable QualitySelectorHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(
+                binaryMessenger, "dev.flutter.pigeon.QualitySelectorHostApi.create", getCodec());
+        if (api != null) {
+          channel.setMessageHandler(
+              (message, reply) -> {
+                ArrayList<Object> wrapped = new ArrayList<Object>();
+                ArrayList<Object> args = (ArrayList<Object>) message;
+                Number identifierArg = (Number) args.get(0);
+                List<Long> videoQualityConstraintIndexListArg = (List<Long>) args.get(1);
+                Number fallbackStrategyIdArg = (Number) args.get(2);
+                try {
+                  api.create(
+                      (identifierArg == null) ? null : identifierArg.longValue(),
+                      videoQualityConstraintIndexListArg,
+                      (fallbackStrategyIdArg == null) ? null : fallbackStrategyIdArg.longValue());
+                  wrapped.add(0, null);
+                } catch (Throwable exception) {
+                  ArrayList<Object> wrappedError = wrapError(exception);
+                  wrapped = wrappedError;
+                }
+                reply.reply(wrapped);
+              });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(
+                binaryMessenger,
+                "dev.flutter.pigeon.QualitySelectorHostApi.getResolution",
+                getCodec());
+        if (api != null) {
+          channel.setMessageHandler(
+              (message, reply) -> {
+                ArrayList<Object> wrapped = new ArrayList<Object>();
+                ArrayList<Object> args = (ArrayList<Object>) message;
+                Number cameraInfoIdArg = (Number) args.get(0);
+                VideoQualityConstraint qualityArg =
+                    args.get(1) == null ? null : VideoQualityConstraint.values()[(int) args.get(1)];
+                try {
+                  ResolutionInfo output =
+                      api.getResolution(
+                          (cameraInfoIdArg == null) ? null : cameraInfoIdArg.longValue(),
+                          qualityArg);
+                  wrapped.add(0, output);
+                } catch (Throwable exception) {
+                  ArrayList<Object> wrappedError = wrapError(exception);
+                  wrapped = wrappedError;
+                }
+                reply.reply(wrapped);
+              });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
+  /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
+  public interface FallbackStrategyHostApi {
+
+    void create(
+        @NonNull Long identifier,
+        @NonNull VideoQualityConstraint quality,
+        @NonNull VideoResolutionFallbackRule fallbackRule);
+
+    /** The codec used by FallbackStrategyHostApi. */
+    static @NonNull MessageCodec<Object> getCodec() {
+      return new StandardMessageCodec();
+    }
+    /**
+     * Sets up an instance of `FallbackStrategyHostApi` to handle messages through the
+     * `binaryMessenger`.
+     */
+    static void setup(
+        @NonNull BinaryMessenger binaryMessenger, @Nullable FallbackStrategyHostApi api) {
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(
+                binaryMessenger, "dev.flutter.pigeon.FallbackStrategyHostApi.create", getCodec());
+        if (api != null) {
+          channel.setMessageHandler(
+              (message, reply) -> {
+                ArrayList<Object> wrapped = new ArrayList<Object>();
+                ArrayList<Object> args = (ArrayList<Object>) message;
+                Number identifierArg = (Number) args.get(0);
+                VideoQualityConstraint qualityArg =
+                    args.get(1) == null ? null : VideoQualityConstraint.values()[(int) args.get(1)];
+                VideoResolutionFallbackRule fallbackRuleArg =
+                    args.get(2) == null
+                        ? null
+                        : VideoResolutionFallbackRule.values()[(int) args.get(2)];
+                try {
+                  api.create(
+                      (identifierArg == null) ? null : identifierArg.longValue(),
+                      qualityArg,
+                      fallbackRuleArg);
+                  wrapped.add(0, null);
+                } catch (Throwable exception) {
+                  ArrayList<Object> wrappedError = wrapError(exception);
+                  wrapped = wrappedError;
+                }
+                reply.reply(wrapped);
+              });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
+    }
+  }
 }