1/*
2 * Copyright (C) 2019 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.automotive.evs@1.1;
18
19import @1.0::IEvsCameraStream;
20import @1.1::BufferDesc;
21import @1.1::EvsEventDesc;
22
23/**
24 * Implemented on client side to receive asynchronous streaming event deliveries.
25 */
26interface IEvsCameraStream extends @1.0::IEvsCameraStream {
27
28    /**
29     * Receives calls from the HAL each time video frames is ready for inspection.
30     * Buffer handles received by this method must be returned via calls to
31     * IEvsCamera::doneWithFrame_1_1(). When the video stream is stopped via a call
32     * to IEvsCamera::stopVideoStream(), this callback may continue to happen for
33     * some time as the pipeline drains. Each frame must still be returned.
34     * When the last frame in the stream has been delivered, STREAM_STOPPED
35     * event must be delivered.  No further frame deliveries may happen
36     * thereafter.
37     *
38     * A camera device will deliver the same number of frames as number of
39     * backing physical camera devices; it means, a physical camera device
40     * sends always a single frame and a logical camera device sends multiple
41     * frames as many as number of backing physical camera devices.
42     *
43     * @param buffer Buffer descriptors of delivered image frames.
44     */
45    oneway deliverFrame_1_1(vec<BufferDesc> buffer);
46
47    /**
48     * Receives calls from the HAL each time an event happens.
49     *
50     * @param  event EVS event with possible event information.
51     */
52    oneway notify(EvsEventDesc event);
53};
54