Define audio HAL
Created after hardware/audio.h with the following changes:
- names changed to satisfy HAL style guide;
- defined getter / setter methods for properties, and interfaces
for devices where needed;
- stream out callback changed to be used over RPC;
- 'dump' method is already defined by BBinder, so in HAL
interfaces it is replaced by 'debugDump'.
Note that audio data is currently transferred using byte buffer,
which is not effective due to memory copy and HwBinder transaction
involved. The transfer method will be changed to FastMessageQueue.
Bug: 30222631
Test: make
Change-Id: Ibb3bd940a91820e81d1a2b53b38d63b9e3de148a
diff --git a/audio/2.0/IStreamOutCallback.hal b/audio/2.0/IStreamOutCallback.hal
new file mode 100644
index 0000000..267c46d
--- /dev/null
+++ b/audio/2.0/IStreamOutCallback.hal
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 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.hardware.audio@2.0;
+
+/*
+ * Asynchronous write callback interface.
+ */
+interface IStreamOutCallback {
+ /*
+ * Non blocking write completed.
+ */
+ onWriteReady();
+
+ /*
+ * Drain completed.
+ */
+ onDrainReady();
+
+ /*
+ * Stream hit an error.
+ */
+ onError();
+};