1 files changed, 43 insertions, 0 deletions
diff --git a/media/bufferpool/2.0/IConnection.hal b/media/bufferpool/2.0/IConnection.hal
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+++ b/media/bufferpool/2.0/IConnection.hal
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+/*
+ * Copyright (C) 2018 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.media.bufferpool@2.0;
+
+/**
+ * A connection to a buffer pool which handles requests from a buffer pool
+ * client. The connection must be made in order to receive buffers from
+ * other buffer pool clients.
+ */
+interface IConnection {
+
+    /**
+     * Retrieves a buffer using bufferId. The method must be called from
+     * receiving side of buffer during transferring only when the specified
+     * buffer is neither cached nor used. This fails if the specified
+     * transaction is not valid.
+     *
+     * @param transactionId Unique transaction id for buffer transferring.
+     * @param bufferId Id of the buffer to be fetched.
+     * @return status The status of the call.
+     *     OK               - A buffer was fetched successfully.
+     *     NO_MEMORY        - Memory allocation failure occurred.
+     *     NOT_FOUND        - A buffer was not found due to invalidation.
+     *     CRITICAL_ERROR   - Other errors.
+     * @return buffer The actual buffer which is specified with bufferId.
+     */
+    fetch(uint64_t transactionId, uint32_t bufferId) generates
+        (ResultStatus status, Buffer buffer);
+};