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      1 /*
      2  * device_manager.h - device manager
      3  *
      4  *  Copyright (c) 2014-2015 Intel Corporation
      5  *
      6  * Licensed under the Apache License, Version 2.0 (the "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  *
     18  * Author: Wind Yuan <feng.yuan (at) intel.com>
     19  */
     20 
     21 #ifndef XCAM_DEVICE_MANAGER_H
     22 #define XCAM_DEVICE_MANAGER_H
     23 
     24 #include <xcam_std.h>
     25 #include <v4l2_device.h>
     26 #include <v4l2_buffer_proxy.h>
     27 #include <x3a_analyzer.h>
     28 #include <smart_analyzer.h>
     29 #include <x3a_image_process_center.h>
     30 #include <image_processor.h>
     31 #include <poll_thread.h>
     32 #include <stats_callback_interface.h>
     33 
     34 namespace XCam {
     35 
     36 enum XCamMessageType {
     37     XCAM_MESSAGE_BUF_OK = 0,
     38     XCAM_MESSAGE_BUF_ERROR,
     39     XCAM_MESSAGE_STATS_OK,
     40     XCAM_MESSAGE_STATS_ERROR,
     41     XCAM_MESSAGE_3A_RESULTS_OK,
     42     XCAM_MESSAGE_3A_RESULTS_ERROR,
     43 };
     44 
     45 struct XCamMessage {
     46     int64_t          timestamp;
     47     XCamMessageType  msg_id;
     48     char            *msg;
     49 
     50     XCamMessage (
     51         XCamMessageType type,
     52         int64_t timestamp = InvalidTimestamp,
     53         const char *message = NULL);
     54     ~XCamMessage ();
     55 
     56     XCAM_DEAD_COPY (XCamMessage);
     57 };
     58 
     59 class MessageThread;
     60 
     61 class DeviceManager
     62     : public PollCallback
     63     , public StatsCallback
     64     , public AnalyzerCallback
     65     , public ImageProcessCallback
     66 {
     67     friend class MessageThread;
     68 
     69 public:
     70     DeviceManager();
     71     virtual ~DeviceManager();
     72 
     73     bool set_capture_device (SmartPtr<V4l2Device> device);
     74     bool set_event_device (SmartPtr<V4l2SubDevice> device);
     75     bool set_3a_analyzer (SmartPtr<X3aAnalyzer> analyzer);
     76     bool set_smart_analyzer (SmartPtr<SmartAnalyzer> analyzer);
     77     bool add_image_processor (SmartPtr<ImageProcessor> processor);
     78     bool set_poll_thread (SmartPtr<PollThread> thread);
     79 
     80     SmartPtr<V4l2Device>& get_capture_device () {
     81         return _device;
     82     }
     83     SmartPtr<V4l2SubDevice>& get_event_device () {
     84         return _subdevice;
     85     }
     86     SmartPtr<X3aAnalyzer>& get_analyzer () {
     87         return _3a_analyzer;
     88     }
     89 
     90     bool is_running () const {
     91         return _is_running;
     92     }
     93     bool has_3a () const {
     94         return _has_3a;
     95     }
     96 
     97     XCamReturn start ();
     98     XCamReturn stop ();
     99 
    100 protected:
    101     virtual void handle_message (const SmartPtr<XCamMessage> &msg) = 0;
    102     virtual void handle_buffer (const SmartPtr<VideoBuffer> &buf) = 0;
    103 
    104 protected:
    105     //virtual functions derived from PollCallback
    106     virtual XCamReturn poll_buffer_ready (SmartPtr<VideoBuffer> &buf);
    107     virtual XCamReturn poll_buffer_failed (int64_t timestamp, const char *msg);
    108     virtual XCamReturn x3a_stats_ready (const SmartPtr<X3aStats> &stats);
    109     virtual XCamReturn dvs_stats_ready ();
    110     virtual XCamReturn scaled_image_ready (const SmartPtr<VideoBuffer> &buffer);
    111 
    112     //virtual functions derived from AnalyzerCallback
    113     virtual void x3a_calculation_done (XAnalyzer *analyzer, X3aResultList &results);
    114     virtual void x3a_calculation_failed (XAnalyzer *analyzer, int64_t timestamp, const char *msg);
    115 
    116     //virtual functions derived from ImageProcessCallback
    117     virtual void process_buffer_done (ImageProcessor *processor, const SmartPtr<VideoBuffer> &buf);
    118     virtual void process_buffer_failed (ImageProcessor *processor, const SmartPtr<VideoBuffer> &buf);
    119     virtual void process_image_result_done (ImageProcessor *processor, const SmartPtr<X3aResult> &result);
    120 
    121 private:
    122     void post_message (XCamMessageType type, int64_t timestamp, const char *msg);
    123     XCamReturn message_loop ();
    124 
    125     XCAM_DEAD_COPY (DeviceManager);
    126 
    127 protected:
    128     SmartPtr<V4l2Device>             _device;
    129     SmartPtr<V4l2SubDevice>          _subdevice;
    130     SmartPtr<PollThread>             _poll_thread;
    131 
    132     /* 3A calculation and image processing*/
    133     bool                             _has_3a;
    134     SmartPtr<X3aAnalyzer>            _3a_analyzer;
    135     SmartPtr<X3aImageProcessCenter>  _3a_process_center;
    136 
    137     /* msg queue */
    138     SafeList<XCamMessage>            _msg_queue;
    139     SmartPtr<MessageThread>          _msg_thread;
    140 
    141     bool                             _is_running;
    142 
    143     /* smart analysis */
    144     SmartPtr<SmartAnalyzer>         _smart_analyzer;
    145 };
    146 
    147 };
    148 
    149 #endif //XCAM_DEVICE_MANAGER_H
    150