blob: 63305b918200d9fb915e8a08352cadbf2175304a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_VIDEOCAPTURE_H
#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_VIDEOCAPTURE_H
#include <atomic>
#include <thread>
#include <functional>
#include <linux/videodev2.h>
typedef v4l2_buffer imageBuffer;
class VideoCapture {
public:
bool open(const char* deviceName);
void close();
bool startStream(std::function<void(VideoCapture*, imageBuffer*, void*)> callback = nullptr);
void stopStream();
// Valid only after open()
__u32 getWidth() { return mWidth; };
__u32 getHeight() { return mHeight; };
__u32 getStride() { return mStride; };
__u32 getV4LFormat() { return mFormat; };
// NULL until stream is started
void* getLatestData() { return mPixelBuffer; };
bool isFrameReady() { return mFrameReady; };
void markFrameConsumed() { returnFrame(); };
bool isOpen() { return mDeviceFd >= 0; };
private:
void collectFrames();
void markFrameReady();
bool returnFrame();
int mDeviceFd = -1;
v4l2_buffer mBufferInfo = {};
void* mPixelBuffer = nullptr;
__u32 mFormat = 0;
__u32 mWidth = 0;
__u32 mHeight = 0;
__u32 mStride = 0;
std::function<void(VideoCapture*, imageBuffer*, void*)> mCallback;
std::thread mCaptureThread; // The thread we'll use to dispatch frames
std::atomic<int> mRunMode; // Used to signal the frame loop (see RunModes below)
std::atomic<bool> mFrameReady; // Set when a frame has been delivered
// Careful changing these -- we're using bit-wise ops to manipulate these
enum RunModes {
STOPPED = 0,
RUN = 1,
STOPPING = 2,
};
};
#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_0_VIDEOCAPTURE_
|
