1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.hardware.media.bufferpool@1.0; 18 19 /** 20 * A connection to a buffer pool which handles requests from a buffer pool 21 * client. The connection must be made in order to receive buffers from 22 * other buffer pool clients. 23 */ 24 interface IConnection { 25 26 /** 27 * Retrieves a buffer using bufferId. The method must be called from 28 * receiving side of buffer during transferring only when the specified 29 * buffer is neither cached nor used. This fails if the specified 30 * transaction is not valid. 31 * 32 * @param transactionId Unique transaction id for buffer transferring. 33 * @param bufferId Id of the buffer to be fetched. 34 * @return status The status of the call. 35 * OK - A buffer was fetched successfully. 36 * NO_MEMORY - Memory allocation failure occurred. 37 * NOT_FOUND - A buffer was not found due to invalidation. 38 * CRITICAL_ERROR - Other errors. 39 * @return buffer The actual buffer which is specified with bufferId. 40 */ 41 fetch(uint64_t transactionId, uint32_t bufferId) generates 42 (ResultStatus status, Buffer buffer); 43 }; 44
