Avoid AAudioService->AAudioServiceInterface inheritence
This is required in order to prepare for divergence of
AAudioServiceInterface from BnAAudioService: if AAudioService
inherits from both, we would have method collisions as soon as we
change the signatures on one of the interfaces.
We achieve the same behavior with an adapter, which in this change is
completely trivial, but will be used as soon as the interfaces
actually diverge.
Bug: 160253486
Test: Manual testing using OboeTester
Ran atest CtsNativeMediaAAudioTestCases
Change-Id: I0d3e41e2378f1e6ff9cbe37461682f7373f463f2
diff --git a/media/libaaudio/src/binding/AAudioBinderAdapter.h b/media/libaaudio/src/binding/AAudioBinderAdapter.h
new file mode 100644
index 0000000..91dc6a6
--- /dev/null
+++ b/media/libaaudio/src/binding/AAudioBinderAdapter.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#pragma once
+
+#include <binding/IAAudioService.h>
+#include <binding/AAudioServiceInterface.h>
+
+namespace aaudio {
+
+/**
+ * An adapter that takes in an underlying IAAudioService and exposes an
+ * AAudioServiceInterface.
+ *
+ * This class is abstract: the client is expected to inherit from this class and implement those
+ * methods from AAudioServiceInterface that don't have counterparts in IAAudioService.
+ */
+class AAudioBinderAdapter : public AAudioServiceInterface {
+public:
+ explicit AAudioBinderAdapter(android::IAAudioService* delegate);
+
+ void registerClient(const android::sp<IAAudioClient>& client) override;
+
+ aaudio_handle_t openStream(const AAudioStreamRequest& request,
+ AAudioStreamConfiguration& configuration) override;
+
+ aaudio_result_t closeStream(aaudio_handle_t streamHandle) override;
+
+ aaudio_result_t getStreamDescription(aaudio_handle_t streamHandle,
+ AudioEndpointParcelable& parcelable) override;
+
+ aaudio_result_t startStream(aaudio_handle_t streamHandle) override;
+
+ aaudio_result_t pauseStream(aaudio_handle_t streamHandle) override;
+
+ aaudio_result_t stopStream(aaudio_handle_t streamHandle) override;
+
+ aaudio_result_t flushStream(aaudio_handle_t streamHandle) override;
+
+ aaudio_result_t registerAudioThread(aaudio_handle_t streamHandle,
+ pid_t clientThreadId,
+ int64_t periodNanoseconds) override;
+
+ aaudio_result_t unregisterAudioThread(aaudio_handle_t streamHandle,
+ pid_t clientThreadId) override;
+
+private:
+ android::IAAudioService* const mDelegate;
+};
+
+} // namespace aaudio