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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* Copyright (C) 2012 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_SERVERS_CAMERA_CAMERA2_CAPTURESEQUENCER_H
#define ANDROID_SERVERS_CAMERA_CAMERA2_CAPTURESEQUENCER_H
#include <utils/Thread.h>
#include <utils/String16.h>
#include <utils/Vector.h>
#include <utils/Mutex.h>
#include <utils/Condition.h>
#include "CameraMetadata.h"
#include "Parameters.h"
#include "FrameProcessor.h"
namespace android {
class Camera2Client;
namespace camera2 {
class ZslProcessor;
class BurstCapture;
/**
* Manages the still image capture process for
* zero-shutter-lag, regular, and video snapshots.
*/
class CaptureSequencer:
virtual public Thread,
virtual public FrameProcessor::FilteredListener {
public:
CaptureSequencer(wp<Camera2Client> client);
~CaptureSequencer();
// Get reference to the ZslProcessor, which holds the ZSL buffers and frames
void setZslProcessor(wp<ZslProcessor> processor);
// Begin still image capture
status_t startCapture();
// Notifications about AE state changes
void notifyAutoExposure(uint8_t newState, int triggerId);
// Notifications from the frame processor
virtual void onFrameAvailable(int32_t frameId, CameraMetadata &frame);
// Notifications from the capture processor
void onCaptureAvailable(nsecs_t timestamp);
void dump(int fd, const Vector<String16>& args);
private:
/**
* Accessed by other threads
*/
Mutex mInputMutex;
bool mStartCapture;
bool mBusy;
Condition mStartCaptureSignal;
bool mNewAEState;
uint8_t mAEState;
int mAETriggerId;
Condition mNewNotifySignal;
bool mNewFrameReceived;
int32_t mNewFrameId;
CameraMetadata mNewFrame;
Condition mNewFrameSignal;
bool mNewCaptureReceived;
nsecs_t mCaptureTimestamp;
Condition mNewCaptureSignal;
/**
* Internal to CaptureSequencer
*/
static const nsecs_t kWaitDuration = 100000000; // 100 ms
static const int kMaxTimeoutsForPrecaptureStart = 2; // 200 ms
static const int kMaxTimeoutsForPrecaptureEnd = 10; // 1 sec
static const int kMaxTimeoutsForCaptureEnd = 40; // 4 sec
wp<Camera2Client> mClient;
wp<ZslProcessor> mZslProcessor;
sp<BurstCapture> mBurstCapture;
enum CaptureState {
IDLE,
START,
ZSL_START,
ZSL_WAITING,
ZSL_REPROCESSING,
STANDARD_START,
STANDARD_PRECAPTURE_WAIT,
STANDARD_CAPTURE,
STANDARD_CAPTURE_WAIT,
BURST_CAPTURE_START,
BURST_CAPTURE_WAIT,
DONE,
ERROR,
NUM_CAPTURE_STATES
} mCaptureState;
static const char* kStateNames[];
typedef CaptureState (CaptureSequencer::*StateManager)(sp<Camera2Client> &client);
static const StateManager kStateManagers[];
CameraMetadata mCaptureRequest;
int mTriggerId;
int mTimeoutCount;
bool mAeInPrecapture;
int32_t mCaptureId;
// Main internal methods
virtual bool threadLoop();
CaptureState manageIdle(sp<Camera2Client> &client);
CaptureState manageStart(sp<Camera2Client> &client);
CaptureState manageZslStart(sp<Camera2Client> &client);
CaptureState manageZslWaiting(sp<Camera2Client> &client);
CaptureState manageZslReprocessing(sp<Camera2Client> &client);
CaptureState manageStandardStart(sp<Camera2Client> &client);
CaptureState manageStandardPrecaptureWait(sp<Camera2Client> &client);
CaptureState manageStandardCapture(sp<Camera2Client> &client);
CaptureState manageStandardCaptureWait(sp<Camera2Client> &client);
CaptureState manageBurstCaptureStart(sp<Camera2Client> &client);
CaptureState manageBurstCaptureWait(sp<Camera2Client> &client);
CaptureState manageDone(sp<Camera2Client> &client);
// Utility methods
status_t updateCaptureRequest(const Parameters ¶ms,
sp<Camera2Client> &client);
};
}; // namespace camera2
}; // namespace android
#endif
|
