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      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_ZSLPROCESSOR3_H
     18 #define ANDROID_SERVERS_CAMERA_CAMERA2_ZSLPROCESSOR3_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 "Parameters.h"
     27 #include "FrameProcessor.h"
     28 #include "camera/CameraMetadata.h"
     29 #include "Camera2Heap.h"
     30 #include "../CameraDeviceBase.h"
     31 #include "ZslProcessorInterface.h"
     32 #include "../camera3/Camera3ZslStream.h"
     33 
     34 namespace android {
     35 
     36 class Camera2Client;
     37 
     38 namespace camera2 {
     39 
     40 class CaptureSequencer;
     41 
     42 /***
     43  * ZSL queue processing
     44  */
     45 class ZslProcessor3 :
     46                     public ZslProcessorInterface,
     47                     public camera3::Camera3StreamBufferListener,
     48             virtual public Thread,
     49             virtual public FrameProcessor::FilteredListener {
     50   public:
     51     ZslProcessor3(sp<Camera2Client> client, wp<CaptureSequencer> sequencer);
     52     ~ZslProcessor3();
     53 
     54     // From FrameProcessor
     55     virtual void onFrameAvailable(int32_t frameId, const CameraMetadata &frame);
     56 
     57     /**
     58      ****************************************
     59      * ZslProcessorInterface implementation *
     60      ****************************************
     61      */
     62 
     63     virtual status_t updateStream(const Parameters &params);
     64     virtual status_t deleteStream();
     65     virtual int getStreamId() const;
     66 
     67     virtual status_t pushToReprocess(int32_t requestId);
     68     virtual status_t clearZslQueue();
     69 
     70     void dump(int fd, const Vector<String16>& args) const;
     71 
     72   protected:
     73     /**
     74      **********************************************
     75      * Camera3StreamBufferListener implementation *
     76      **********************************************
     77      */
     78     typedef camera3::Camera3StreamBufferListener::BufferInfo BufferInfo;
     79     // Buffer was acquired by the HAL
     80     virtual void onBufferAcquired(const BufferInfo& bufferInfo);
     81     // Buffer was released by the HAL
     82     virtual void onBufferReleased(const BufferInfo& bufferInfo);
     83 
     84   private:
     85     static const nsecs_t kWaitDuration = 10000000; // 10 ms
     86 
     87     enum {
     88         RUNNING,
     89         LOCKED
     90     } mState;
     91 
     92     wp<Camera2Client> mClient;
     93     wp<CaptureSequencer> mSequencer;
     94 
     95     const int mId;
     96 
     97     mutable Mutex mInputMutex;
     98 
     99     enum {
    100         NO_STREAM = -1
    101     };
    102 
    103     int mZslStreamId;
    104     sp<camera3::Camera3ZslStream> mZslStream;
    105 
    106     struct ZslPair {
    107         BufferItemConsumer::BufferItem buffer;
    108         CameraMetadata frame;
    109     };
    110 
    111     static const size_t kZslBufferDepth = 4;
    112     static const size_t kFrameListDepth = kZslBufferDepth * 2;
    113     Vector<CameraMetadata> mFrameList;
    114     size_t mFrameListHead;
    115 
    116     ZslPair mNextPair;
    117 
    118     Vector<ZslPair> mZslQueue;
    119     size_t mZslQueueHead;
    120     size_t mZslQueueTail;
    121 
    122     CameraMetadata mLatestCapturedRequest;
    123 
    124     virtual bool threadLoop();
    125 
    126     status_t clearZslQueueLocked();
    127 
    128     void dumpZslQueue(int id) const;
    129 
    130     nsecs_t getCandidateTimestampLocked(size_t* metadataIdx) const;
    131 };
    132 
    133 
    134 }; //namespace camera2
    135 }; //namespace android
    136 
    137 #endif
    138