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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_PROCAMERA2CLIENT_H
     18 #define ANDROID_SERVERS_CAMERA_PROCAMERA2CLIENT_H
     19 
     20 #include "Camera2Device.h"
     21 #include "CameraService.h"
     22 #include "camera2/ProFrameProcessor.h"
     23 #include "Camera2ClientBase.h"
     24 
     25 namespace android {
     26 
     27 class IMemory;
     28 /**
     29  * Implements the binder IProCameraUser API,
     30  * meant for HAL2-level private API access.
     31  */
     32 class ProCamera2Client :
     33         public Camera2ClientBase<CameraService::ProClient>,
     34         public camera2::ProFrameProcessor::FilteredListener
     35 {
     36 public:
     37     /**
     38      * IProCameraUser interface (see IProCameraUser for details)
     39      */
     40     virtual status_t      exclusiveTryLock();
     41     virtual status_t      exclusiveLock();
     42     virtual status_t      exclusiveUnlock();
     43 
     44     virtual bool          hasExclusiveLock();
     45 
     46     // Note that the callee gets a copy of the metadata.
     47     virtual int           submitRequest(camera_metadata_t* metadata,
     48                                         bool streaming = false);
     49     virtual status_t      cancelRequest(int requestId);
     50 
     51     virtual status_t      deleteStream(int streamId);
     52 
     53     virtual status_t      createStream(
     54             int width,
     55             int height,
     56             int format,
     57             const sp<IGraphicBufferProducer>& bufferProducer,
     58             /*out*/
     59             int* streamId);
     60 
     61     // Create a request object from a template.
     62     // -- Caller owns the newly allocated metadata
     63     virtual status_t      createDefaultRequest(int templateId,
     64                                                /*out*/
     65                                                camera_metadata** request);
     66 
     67     // Get the static metadata for the camera
     68     // -- Caller owns the newly allocated metadata
     69     virtual status_t      getCameraInfo(int cameraId,
     70                                         /*out*/
     71                                         camera_metadata** info);
     72 
     73     /**
     74      * Interface used by CameraService
     75      */
     76 
     77     ProCamera2Client(const sp<CameraService>& cameraService,
     78             const sp<IProCameraCallbacks>& remoteCallback,
     79             const String16& clientPackageName,
     80             int cameraId,
     81             int cameraFacing,
     82             int clientPid,
     83             uid_t clientUid,
     84             int servicePid);
     85     virtual ~ProCamera2Client();
     86 
     87     virtual status_t      initialize(camera_module_t *module);
     88 
     89     virtual status_t      dump(int fd, const Vector<String16>& args);
     90 
     91     // Callbacks from camera service
     92     virtual void onExclusiveLockStolen();
     93 
     94     /**
     95      * Interface used by independent components of ProCamera2Client.
     96      */
     97 
     98 protected:
     99     /** FilteredListener implementation **/
    100     virtual void          onFrameAvailable(int32_t frameId,
    101                                            const CameraMetadata& frame);
    102     virtual void          detachDevice();
    103 
    104 private:
    105     /** IProCameraUser interface-related private members */
    106 
    107     /** Preview callback related members */
    108     sp<camera2::ProFrameProcessor> mFrameProcessor;
    109     static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
    110     static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
    111 
    112     /** Utility members */
    113     bool enforceRequestPermissions(CameraMetadata& metadata);
    114 
    115     // Whether or not we have an exclusive lock on the device
    116     // - if no we can't modify the request queue.
    117     // note that creating/deleting streams we own is still OK
    118     bool mExclusiveLock;
    119 };
    120 
    121 }; // namespace android
    122 
    123 #endif
    124