1/*
2 * Copyright (C) 2016 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@1.0;
18
19
20/**
21 * Implemented on client side to receive asynchronous video frame deliveries.
22 */
23interface IEvsCameraStream {
24
25    /**
26     * Receives calls from the HAL each time a video frame is ready for inspection.
27     * Buffer handles received by this method must be returned via calls to
28     * IEvsCamera::doneWithFrame(). When the video stream is stopped via a call
29     * to IEvsCamera::stopVideoStream(), this callback may continue to happen for
30     * some time as the pipeline drains. Each frame must still be returned.
31     * When the last frame in the stream has been delivered, a NULL bufferHandle
32     * must be delivered, signifying the end of the stream. No further frame
33     * deliveries may happen thereafter.
34     *
35     * @param buffer a buffer descriptor of a delivered image frame.
36     */
37    oneway deliverFrame(BufferDesc buffer);
38};
39