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
17package android.hardware.media.bufferpool@2.0;
18
19/**
20 * IObserver listens on notifications from the buffer pool. On receiving
21 * notifications, FMQ messages from the specific buffer pool which are already
22 * in the FMQ are processed.
23 */
24interface IObserver {
25
26    /**
27     * The specific buffer pool sent a message to the client. Calling this
28     * method from the buffer pool enforces a buffer pool client process the
29     * message.
30     *
31     * @param connectionId the connection Id of the specific buffer pool client
32     * @param msgId Id of the most recent message
33     */
34    oneway onMessage(int64_t connectionId, uint32_t msgId);
35};
36