ZslProcessor.h revision cb0652e5a850b2fcd919e977247e87239efaf70e 
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();
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    int getStreamId() const;
71
72    status_t pushToReprocess(int32_t requestId);
73    status_t clearZslQueue();
74
75    void dump(int fd, const Vector<String16>& args) const;
76  private:
77    static const nsecs_t kWaitDuration = 10000000; // 10 ms
78
79    enum {
80        RUNNING,
81        LOCKED
82    } mState;
83
84    wp<Camera2Client> mClient;
85    wp<CameraDeviceBase> mDevice;
86    wp<CaptureSequencer> mSequencer;
87    int mId;
88
89    mutable Mutex mInputMutex;
90    bool mZslBufferAvailable;
91    Condition mZslBufferAvailableSignal;
92
93    enum {
94        NO_STREAM = -1
95    };
96
97    int mZslStreamId;
98    int mZslReprocessStreamId;
99    sp<BufferItemConsumer> mZslConsumer;
100    sp<ANativeWindow>      mZslWindow;
101
102    struct ZslPair {
103        BufferItemConsumer::BufferItem buffer;
104        CameraMetadata frame;
105    };
106
107    static const size_t kZslBufferDepth = 4;
108    static const size_t kFrameListDepth = kZslBufferDepth * 2;
109    Vector<CameraMetadata> mFrameList;
110    size_t mFrameListHead;
111
112    ZslPair mNextPair;
113
114    Vector<ZslPair> mZslQueue;
115    size_t mZslQueueHead;
116    size_t mZslQueueTail;
117
118    CameraMetadata mLatestCapturedRequest;
119
120    virtual bool threadLoop();
121
122    status_t processNewZslBuffer();
123
124    // Match up entries from frame list to buffers in ZSL queue
125    void findMatchesLocked();
126
127    status_t clearZslQueueLocked();
128
129    void dumpZslQueue(int id) const;
130};
131
132
133}; //namespace camera2
134}; //namespace android
135
136#endif
137