BT LE broadcast assistant implementation

BT LE broadcast assistant implementation

Test: compile
Tag: #feature
sponsor: siyuanh@

Change-Id: Ia183608f3551319f79f8e2aa933445346c42c028
Signed-off-by: Myles Watson <mylesgw@google.com>

1 files changed, 271 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothLeBroadcastAssistantCallback.java b/framework/java/android/bluetooth/BluetoothLeBroadcastAssistantCallback.java
new file mode 100755
index 0000000000..96e04a9424
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothLeBroadcastAssistantCallback.java
@@ -0,0 +1,271 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.annotation.NonNull;
+import android.os.Binder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.Executor;
+
+/**
+ * @hide
+ */
+public class BluetoothLeBroadcastAssistantCallback
+            extends IBluetoothLeBroadcastAssistantCallback.Stub {
+    private static final String TAG = BluetoothLeBroadcastAssistantCallback.class.getSimpleName();
+    private boolean mIsRegistered = false;
+    private final Map<BluetoothLeBroadcastAssistant.Callback,
+            Executor> mCallbackMap = new HashMap<>();
+    IBluetoothLeBroadcastAssistant mAdapter;
+
+    public BluetoothLeBroadcastAssistantCallback(IBluetoothLeBroadcastAssistant adapter) {
+        mAdapter = adapter;
+    }
+
+    /**
+     * @hide
+     * @param executor an {@link Executor} to execute given callback
+     * @param callback user implementation of the {@link BluetoothLeBroadcastAssistant#Callback}
+     */
+    public void register(@NonNull Executor executor,
+                         @NonNull BluetoothLeBroadcastAssistant.Callback callback) {
+        synchronized (this) {
+            if (mCallbackMap.containsKey(callback)) {
+                return;
+            }
+            mCallbackMap.put(callback, executor);
+
+            if (!mIsRegistered) {
+                try {
+                    mAdapter.registerCallback(this);
+                    mIsRegistered = true;
+                } catch (RemoteException e) {
+                    Log.w(TAG, "Failed to register broaddcast assistant callback");
+                    Log.e(TAG, Log.getStackTraceString(new Throwable()));
+                }
+            }
+        }
+    }
+
+    /**
+     * @hide
+     * @param callback user implementation of the {@link BluetoothLeBroadcastAssistant#Callback}
+     */
+    public void unregister(@NonNull BluetoothLeBroadcastAssistant.Callback callback) {
+        synchronized (this) {
+            if (!mCallbackMap.containsKey(callback)) {
+                return;
+            }
+            mCallbackMap.remove(callback);
+            if (mCallbackMap.isEmpty() && mIsRegistered) {
+                try {
+                    mAdapter.unregisterCallback(this);
+                    mIsRegistered = false;
+                } catch (RemoteException e) {
+                    Log.w(TAG, "Failed to unregister broaddcast assistant with service");
+                    Log.e(TAG, Log.getStackTraceString(new Throwable()));
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSearchStarted(int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSearchStarted(reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSearchStartFailed(int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSearchStartFailed(reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSearchStopped(int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSearchStopped(reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSearchStopFailed(int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSearchStopFailed(reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceFound(BluetoothLeBroadcastMetadata source) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceFound(source));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceAdded(BluetoothDevice sink, int sourceId, int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceAdded(sink, sourceId, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceAddFailed(BluetoothDevice sink, BluetoothLeBroadcastMetadata source,
+                           int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceAddFailed(sink, source, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceModified(BluetoothDevice sink, int sourceId, int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceModified(sink, sourceId, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceModifyFailed(BluetoothDevice sink, int sourceId, int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceModifyFailed(sink, sourceId, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceRemoved(BluetoothDevice sink, int sourceId, int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceRemoved(sink, sourceId, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onSourceRemoveFailed(BluetoothDevice sink, int sourceId, int reason) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onSourceRemoveFailed(sink, sourceId, reason));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onReceiveStateChanged(BluetoothDevice sink, int sourceId,
+                               BluetoothLeBroadcastReceiveState state) {
+        synchronized (this) {
+            for (BluetoothLeBroadcastAssistant.Callback cb : mCallbackMap.keySet()) {
+                Executor executor = mCallbackMap.get(cb);
+                final long identity = Binder.clearCallingIdentity();
+                try {
+                    executor.execute(() -> cb.onReceiveStateChanged(sink, sourceId, state));
+                } finally {
+                    Binder.restoreCallingIdentity(identity);
+                }
+            }
+        }
+    }
+}