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_CALLBACKPROCESSOR_H
18 #define ANDROID_SERVERS_CAMERA_CAMERA2_CALLBACKPROCESSOR_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/CpuConsumer.h>
26 
27 #include "api1/client2/Camera2Heap.h"
28 
29 namespace android {
30 
31 class Camera2Client;
32 class CameraDeviceBase;
33 
34 namespace camera2 {
35 
36 class Parameters;
37 
38 /***
39  * Still image capture output image processing
40  */
41 class CallbackProcessor:
42             public Thread, public CpuConsumer::FrameAvailableListener {
43   public:
44     CallbackProcessor(sp<Camera2Client> client);
45     ~CallbackProcessor();
46 
47     void onFrameAvailable(const BufferItem& item);
48 
49     // Set to NULL to disable the direct-to-app callback window
50     status_t setCallbackWindow(sp<Surface> callbackWindow);
51     status_t updateStream(const Parameters &params);
52     status_t deleteStream();
53     int getStreamId() const;
54 
55     void dump(int fd, const Vector<String16>& args) const;
56   private:
57     static const nsecs_t kWaitDuration = 10000000; // 10 ms
58     wp<Camera2Client> mClient;
59     wp<CameraDeviceBase> mDevice;
60     int mId;
61 
62     mutable Mutex mInputMutex;
63     bool mCallbackAvailable;
64     Condition mCallbackAvailableSignal;
65 
66     enum {
67         NO_STREAM = -1
68     };
69 
70     // True if mCallbackWindow is a remote consumer, false if just the local
71     // mCallbackConsumer
72     bool mCallbackToApp;
73     int mCallbackStreamId;
74     static const size_t kCallbackHeapCount = 6;
75     sp<CpuConsumer>    mCallbackConsumer;
76     sp<Surface>        mCallbackWindow;
77     sp<Camera2Heap>    mCallbackHeap;
78     int mCallbackHeapId;
79     size_t mCallbackHeapHead, mCallbackHeapFree;
80 
81     virtual bool threadLoop();
82 
83     status_t processNewCallback(sp<Camera2Client> &client);
84     // Used when shutting down
85     status_t discardNewCallback();
86 
87     // Convert from flexible YUV to NV21 or YV12
88     status_t convertFromFlexibleYuv(int32_t previewFormat,
89             uint8_t *dst,
90             const CpuConsumer::LockedBuffer &src,
91             uint32_t dstYStride,
92             uint32_t dstCStride) const;
93 };
94 
95 
96 }; //namespace camera2
97 }; //namespace android
98 
99 #endif
100