ZslProcessor.h revision f1e98d857ec377f2c9b916073d40732e6ebb7ced 
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
28#include "common/CameraDeviceBase.h"
29#include "api1/client2/ZslProcessorInterface.h"
30#include "api1/client2/FrameProcessor.h"
31
32namespace android {
33
34class Camera2Client;
35
36namespace camera2 {
37
38class CaptureSequencer;
39class Parameters;
40
41/***
42 * ZSL queue processing
43 */
44class ZslProcessor:
45            virtual public Thread,
46            virtual public BufferItemConsumer::FrameAvailableListener,
47            virtual public FrameProcessor::FilteredListener,
48            virtual public CameraDeviceBase::BufferReleasedListener,
49                    public ZslProcessorInterface {
50  public:
51    ZslProcessor(sp<Camera2Client> client, wp<CaptureSequencer> sequencer);
52    ~ZslProcessor();
53
54    // From mZslConsumer
55    virtual void onFrameAvailable();
56    // From FrameProcessor
57    virtual void onFrameAvailable(int32_t requestId, const CameraMetadata &frame);
58
59    virtual void onBufferReleased(buffer_handle_t *handle);
60
61    /**
62     ****************************************
63     * ZslProcessorInterface implementation *
64     ****************************************
65     */
66
67    status_t updateStream(const Parameters &params);
68    status_t deleteStream();
69    int getStreamId() const;
70
71    status_t pushToReprocess(int32_t requestId);
72    status_t clearZslQueue();
73
74    void dump(int fd, const Vector<String16>& args) const;
75  private:
76    static const nsecs_t kWaitDuration = 10000000; // 10 ms
77
78    enum {
79        RUNNING,
80        LOCKED
81    } mState;
82
83    wp<Camera2Client> mClient;
84    wp<CameraDeviceBase> mDevice;
85    wp<CaptureSequencer> mSequencer;
86    int mId;
87
88    mutable Mutex mInputMutex;
89    bool mZslBufferAvailable;
90    Condition mZslBufferAvailableSignal;
91
92    enum {
93        NO_STREAM = -1
94    };
95
96    int mZslStreamId;
97    int mZslReprocessStreamId;
98    sp<BufferItemConsumer> mZslConsumer;
99    sp<ANativeWindow>      mZslWindow;
100
101    struct ZslPair {
102        BufferItemConsumer::BufferItem buffer;
103        CameraMetadata frame;
104    };
105
106    static const size_t kZslBufferDepth = 4;
107    static const size_t kFrameListDepth = kZslBufferDepth * 2;
108    Vector<CameraMetadata> mFrameList;
109    size_t mFrameListHead;
110
111    ZslPair mNextPair;
112
113    Vector<ZslPair> mZslQueue;
114    size_t mZslQueueHead;
115    size_t mZslQueueTail;
116
117    CameraMetadata mLatestCapturedRequest;
118
119    virtual bool threadLoop();
120
121    status_t processNewZslBuffer();
122
123    // Match up entries from frame list to buffers in ZSL queue
124    void findMatchesLocked();
125
126    status_t clearZslQueueLocked();
127
128    void dumpZslQueue(int id) const;
129};
130
131
132}; //namespace camera2
133}; //namespace android
134
135#endif
136