1/*
2 * Copyright (C) 2013 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_PROFRAMEPROCESSOR_H
18#define ANDROID_SERVERS_CAMERA_CAMERA2_PROFRAMEPROCESSOR_H
19
20#include <utils/Thread.h>
21#include <utils/String16.h>
22#include <utils/Vector.h>
23#include <utils/KeyedVector.h>
24#include <utils/List.h>
25#include <camera/CameraMetadata.h>
26#include <camera/CaptureResult.h>
27
28namespace android {
29
30class CameraDeviceBase;
31
32namespace camera2 {
33
34/* Output frame metadata processing thread.  This thread waits for new
35 * frames from the device, and analyzes them as necessary.
36 */
37class FrameProcessorBase: public Thread {
38  public:
39    FrameProcessorBase(wp<CameraDeviceBase> device);
40    virtual ~FrameProcessorBase();
41
42    struct FilteredListener: virtual public RefBase {
43        virtual void onResultAvailable(const CaptureResult &result) = 0;
44    };
45
46    // Register a listener for a range of IDs [minId, maxId). Multiple listeners
47    // can be listening to the same range. Registering the same listener with
48    // the same range of IDs has no effect.
49    // sendPartials controls whether partial results will be sent.
50    status_t registerListener(int32_t minId, int32_t maxId,
51                              wp<FilteredListener> listener,
52                              bool sendPartials = true);
53    status_t removeListener(int32_t minId, int32_t maxId,
54                            wp<FilteredListener> listener);
55
56    void dump(int fd, const Vector<String16>& args);
57  protected:
58    static const nsecs_t kWaitDuration = 10000000; // 10 ms
59    wp<CameraDeviceBase> mDevice;
60
61    virtual bool threadLoop();
62
63    Mutex mInputMutex;
64    Mutex mLastFrameMutex;
65
66    struct RangeListener {
67        int32_t minId;
68        int32_t maxId;
69        wp<FilteredListener> listener;
70        bool sendPartials;
71    };
72    List<RangeListener> mRangeListeners;
73
74    // Number of partial result the HAL will potentially send.
75    int32_t mNumPartialResults;
76
77    void processNewFrames(const sp<CameraDeviceBase> &device);
78
79    virtual bool processSingleFrame(CaptureResult &result,
80                                    const sp<CameraDeviceBase> &device);
81
82    status_t processListeners(const CaptureResult &result,
83                              const sp<CameraDeviceBase> &device);
84
85    CameraMetadata mLastFrame;
86};
87
88
89}; //namespace camera2
90}; //namespace android
91
92#endif
93