1/*
2 * Copyright (C) 2015 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#ifndef STREAM_H_
18#define STREAM_H_
19
20#include <hardware/camera3.h>
21#include <hardware/gralloc.h>
22#include <system/graphics.h>
23#include <utils/Mutex.h>
24#include <utils/Vector.h>
25
26namespace usb_camera_hal {
27// Stream represents a single input or output stream for a camera device.
28class Stream {
29    public:
30        Stream(int id, camera3_stream_t *s);
31        ~Stream();
32
33        // validate that a stream's parameters match this stream's parameters
34        bool isValidReuseStream(int id, camera3_stream_t *s);
35
36        void setUsage(uint32_t usage);
37        void setMaxBuffers(uint32_t max_buffers);
38
39        int getType();
40        bool isInputType();
41        bool isOutputType();
42        const char* typeToString(int type);
43        const char* formatToString(int format);
44        void dump(int fd);
45
46        // This stream is being reused. Used in stream configuration passes
47        bool mReuse;
48
49    private:
50        // The camera device id this stream belongs to
51        const int mId;
52        // Handle to framework's stream, used as a cookie for buffers
53        camera3_stream_t *mStream;
54        // Array of handles to buffers currently in use by the stream
55        android::Vector<buffer_handle_t *> mBuffers;
56        // Lock protecting the Stream object for modifications
57        android::Mutex mLock;
58};
59} // namespace usb_camera_hal
60
61#endif // STREAM_H_
62