ZslProcessor.h revision 04f101c35eaa90b1f95939afac30674ec1611e6f 
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/BufferItemConsumer.h>
26#include <camera/CameraMetadata.h>
27#include <camera/CaptureResult.h>
28
29#include "common/CameraDeviceBase.h"
30#include "api1/client2/ZslProcessorInterface.h"
31#include "api1/client2/FrameProcessor.h"
32
33namespace android {
34
35class Camera2Client;
36
37namespace camera2 {
38
39class CaptureSequencer;
40class Parameters;
41
42/***
43 * ZSL queue processing
44 */
45class ZslProcessor:
46            virtual public Thread,
47            virtual public BufferItemConsumer::FrameAvailableListener,
48            virtual public FrameProcessor::FilteredListener,
49            virtual public CameraDeviceBase::BufferReleasedListener,
50                    public ZslProcessorInterface {
51  public:
52    ZslProcessor(sp<Camera2Client> client, wp<CaptureSequencer> sequencer);
53    ~ZslProcessor();
54
55    // From mZslConsumer
56    virtual void onFrameAvailable(const BufferItem& item);
57    // From FrameProcessor
58    virtual void onResultAvailable(const CaptureResult &result);
59
60    virtual void onBufferReleased(buffer_handle_t *handle);
61
62    /**
63     ****************************************
64     * ZslProcessorInterface implementation *
65     ****************************************
66     */
67
68    status_t updateStream(const Parameters &params);
69    status_t deleteStream();
70    status_t disconnect();
71    int getStreamId() const;
72
73    status_t pushToReprocess(int32_t requestId);
74    status_t clearZslQueue();
75
76    void dump(int fd, const Vector<String16>& args) const;
77  private:
78    static const nsecs_t kWaitDuration = 10000000; // 10 ms
79
80    enum {
81        RUNNING,
82        LOCKED
83    } mState;
84
85    wp<Camera2Client> mClient;
86    wp<CameraDeviceBase> mDevice;
87    wp<CaptureSequencer> mSequencer;
88    int mId;
89
90    bool mDeleted;
91
92    mutable Mutex mInputMutex;
93    bool mZslBufferAvailable;
94    Condition mZslBufferAvailableSignal;
95
96    enum {
97        NO_STREAM = -1
98    };
99
100    int mZslStreamId;
101    int mZslReprocessStreamId;
102    sp<BufferItemConsumer> mZslConsumer;
103    sp<ANativeWindow>      mZslWindow;
104
105    struct ZslPair {
106        BufferItemConsumer::BufferItem buffer;
107        CameraMetadata frame;
108    };
109
110    static const size_t kZslBufferDepth = 4;
111    static const size_t kFrameListDepth = kZslBufferDepth * 2;
112    Vector<CameraMetadata> mFrameList;
113    size_t mFrameListHead;
114
115    ZslPair mNextPair;
116
117    Vector<ZslPair> mZslQueue;
118    size_t mZslQueueHead;
119    size_t mZslQueueTail;
120
121    CameraMetadata mLatestCapturedRequest;
122
123    virtual bool threadLoop();
124
125    status_t processNewZslBuffer();
126
127    // Match up entries from frame list to buffers in ZSL queue
128    void findMatchesLocked();
129
130    status_t clearZslQueueLocked();
131
132    void dumpZslQueue(int id) const;
133};
134
135
136}; //namespace camera2
137}; //namespace android
138
139#endif
140