1 /* 2 * poll_thread.h - poll thread for event and buffer 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@intel.com> 19 */ 20 21 #ifndef XCAM_POLL_THREAD_H 22 #define XCAM_POLL_THREAD_H 23 24 #include <xcam_std.h> 25 #include <xcam_mutex.h> 26 #include <x3a_event.h> 27 #include <v4l2_buffer_proxy.h> 28 #include <x3a_stats_pool.h> 29 #include <v4l2_device.h> 30 #include <stats_callback_interface.h> 31 32 namespace XCam { 33 34 class PollCallback 35 { 36 public: PollCallback()37 PollCallback () {} ~PollCallback()38 virtual ~PollCallback() {} 39 virtual XCamReturn poll_buffer_ready (SmartPtr<VideoBuffer> &buf) = 0; 40 virtual XCamReturn poll_buffer_failed (int64_t timestamp, const char *msg) = 0; 41 42 private: 43 XCAM_DEAD_COPY (PollCallback); 44 45 }; 46 47 class V4l2Device; 48 class V4l2SubDevice; 49 class EventPollThread; 50 class CapturePollThread; 51 52 class PollThread 53 { 54 friend class EventPollThread; 55 friend class CapturePollThread; 56 friend class FakePollThread; 57 public: 58 explicit PollThread (); 59 virtual ~PollThread (); 60 61 bool set_capture_device (SmartPtr<V4l2Device> &dev); 62 bool set_event_device (SmartPtr<V4l2SubDevice> &sub_dev); 63 bool set_poll_callback (PollCallback *callback); 64 bool set_stats_callback (StatsCallback *callback); 65 66 virtual XCamReturn start(); 67 virtual XCamReturn stop (); 68 69 protected: 70 XCamReturn poll_subdev_event_loop (); 71 virtual XCamReturn poll_buffer_loop (); 72 73 virtual XCamReturn handle_events (struct v4l2_event &event); 74 XCamReturn handle_3a_stats_event (struct v4l2_event &event); 75 76 private: 77 virtual XCamReturn init_3a_stats_pool (); 78 virtual XCamReturn capture_3a_stats (SmartPtr<X3aStats> &stats); 79 80 private: 81 XCAM_DEAD_COPY (PollThread); 82 83 private: 84 static const int default_subdev_event_timeout; 85 static const int default_capture_event_timeout; 86 87 SmartPtr<EventPollThread> _event_loop; 88 SmartPtr<CapturePollThread> _capture_loop; 89 90 SmartPtr<V4l2SubDevice> _event_dev; 91 SmartPtr<V4l2Device> _capture_dev; 92 93 PollCallback *_poll_callback; 94 StatsCallback *_stats_callback; 95 }; 96 97 }; 98 99 #endif //XCAM_POLL_THREAD_H 100