ZslProcessor.h revision 727d172137b4f32681c098de8e2623c0b65a6406 
1/*
2 * Copyright (C) 2012 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 ANDROID_SERVERS_CAMERA_CAMERA2_ZSLPROCESSOR_H
18#define ANDROID_SERVERS_CAMERA_CAMERA2_ZSLPROCESSOR_H
19
20#include <utils/Thread.h>
21#include <utils/String16.h>
22#include <utils/Vector.h>
23#include <utils/Mutex.h>
24#include <utils/Condition.h>
25#include <gui/BufferItem.h>
26#include <gui/BufferItemConsumer.h>
27#include <camera/CameraMetadata.h>
28#include <camera/CaptureResult.h>
29
30#include "common/CameraDeviceBase.h"
31#include "api1/client2/ZslProcessorInterface.h"
32#include "api1/client2/FrameProcessor.h"
33
34namespace android {
35
36class Camera2Client;
37
38namespace camera2 {
39
40class CaptureSequencer;
41class Parameters;
42
43/***
44 * ZSL queue processing
45 */
46class ZslProcessor:
47            virtual public Thread,
48            virtual public BufferItemConsumer::FrameAvailableListener,
49            virtual public FrameProcessor::FilteredListener,
50            virtual public CameraDeviceBase::BufferReleasedListener,
51                    public ZslProcessorInterface {
52  public:
53    ZslProcessor(sp<Camera2Client> client, wp<CaptureSequencer> sequencer);
54    ~ZslProcessor();
55
56    // From mZslConsumer
57    virtual void onFrameAvailable(const BufferItem& item);
58    // From FrameProcessor
59    virtual void onResultAvailable(const CaptureResult &result);
60
61    virtual void onBufferReleased(buffer_handle_t *handle);
62
63    /**
64     ****************************************
65     * ZslProcessorInterface implementation *
66     ****************************************
67     */
68
69    status_t updateStream(const Parameters &params);
70    status_t deleteStream();
71    status_t disconnect();
72    int getStreamId() const;
73
74    status_t pushToReprocess(int32_t requestId);
75    status_t clearZslQueue();
76
77    void dump(int fd, const Vector<String16>& args) const;
78  private:
79    static const nsecs_t kWaitDuration = 10000000; // 10 ms
80
81    enum {
82        RUNNING,
83        LOCKED
84    } mState;
85
86    wp<Camera2Client> mClient;
87    wp<CameraDeviceBase> mDevice;
88    wp<CaptureSequencer> mSequencer;
89    int mId;
90
91    bool mDeleted;
92
93    mutable Mutex mInputMutex;
94    bool mZslBufferAvailable;
95    Condition mZslBufferAvailableSignal;
96
97    enum {
98        NO_STREAM = -1
99    };
100
101    int mZslStreamId;
102    int mZslReprocessStreamId;
103    sp<BufferItemConsumer> mZslConsumer;
104    sp<Surface>            mZslWindow;
105
106    struct ZslPair {
107        BufferItem buffer;
108        CameraMetadata frame;
109    };
110
111    static const size_t kZslBufferDepth = 4;
112    static const size_t kFrameListDepth = kZslBufferDepth * 2;
113    Vector<CameraMetadata> mFrameList;
114    size_t mFrameListHead;
115
116    ZslPair mNextPair;
117
118    Vector<ZslPair> mZslQueue;
119    size_t mZslQueueHead;
120    size_t mZslQueueTail;
121
122    CameraMetadata mLatestCapturedRequest;
123
124    virtual bool threadLoop();
125
126    status_t processNewZslBuffer();
127
128    // Match up entries from frame list to buffers in ZSL queue
129    void findMatchesLocked();
130
131    status_t clearZslQueueLocked();
132
133    void dumpZslQueue(int id) const;
134};
135
136
137}; //namespace camera2
138}; //namespace android
139
140#endif
141