cas: add CAS hal
Add CAS hal definitions and default service implementation.
bug: 22804304
Change-Id: I0a89608fe75c5f3c5e6888f9b771305742760707
diff --git a/cas/native/1.0/IDescrambler.hal b/cas/native/1.0/IDescrambler.hal
new file mode 100644
index 0000000..459e5e3
--- /dev/null
+++ b/cas/native/1.0/IDescrambler.hal
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2017 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.cas.native@1.0;
+
+import android.hardware.cas@1.0::IDescramblerBase;
+
+/**
+ * IDescrambler is the native plugin API for descrambling operations.
+ */
+
+interface IDescrambler extends IDescramblerBase {
+ /**
+ * Descramble the data in a source SharedBuffer, described by an array of
+ * SubSample structures.
+ *
+ * @param scramblingControl an enumeration indicating the key that the subsamples
+ * were scrambled with.
+ * @param subSamples an array of SubSample structures describing the number of
+ * clear and scrambled bytes within each subsample.
+ * @param srcBuffer the SharedBuffer containing the source scrambled data.
+ * @param srcOffset the position where the source scrambled data starts at.
+ * @param dstBuffer the DestinationBuffer to hold the descrambled data.
+ * @param dstOffset the position where the descrambled data should start at.
+ *
+ * @return status the status of the call.
+ * @return bytesWritten number of bytes that have been successfully descrambled.
+ * @return detailedError a detailed message describing the error (if any).
+ */
+ descramble(ScramblingControl scramblingControl, vec<SubSample> subSamples,
+ SharedBuffer srcBuffer, uint64_t srcOffset, DestinationBuffer dstBuffer, uint64_t dstOffset)
+ generates(Status status, uint32_t bytesWritten, string detailedError);
+};