1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set sw=2 ts=8 et ft=cpp : */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef mozilla_VideoEngine_h 8 #define mozilla_VideoEngine_h 9 10 #include "MediaEngine.h" 11 #include "VideoFrameUtils.h" 12 #include "mozilla/media/MediaUtils.h" 13 #include "webrtc/modules/video_capture/video_capture_impl.h" 14 #include "webrtc/modules/video_capture/video_capture_defines.h" 15 #include "webrtc/modules/video_capture/video_capture_factory.h" 16 #include "webrtc/video_engine/desktop_capture_impl.h" 17 #include <memory> 18 #include <functional> 19 20 namespace mozilla { 21 namespace camera { 22 23 // Historically the video engine was part of webrtc 24 // it was removed (and reimplemented in Talk) 25 class VideoEngine { 26 private: ~VideoEngine()27 virtual ~VideoEngine(){}; 28 // Base cache expiration period 29 // Note because cameras use HW plug event detection, this 30 // only applies to screen based modes. 31 static const int64_t kCacheExpiryPeriodMs = 2000; 32 33 public: VideoEngine()34 VideoEngine(){}; 35 NS_INLINE_DECL_REFCOUNTING(VideoEngine) 36 37 static already_AddRefed<VideoEngine> Create( 38 UniquePtr<const webrtc::Config>&& aConfig); 39 #if defined(ANDROID) 40 static int SetAndroidObjects(JavaVM* javaVM); 41 #endif 42 void CreateVideoCapture(int32_t& id, const char* deviceUniqueIdUTF8); 43 44 int ReleaseVideoCapture(const int32_t id); 45 46 // VideoEngine is responsible for any cleanup in its modules Delete(VideoEngine * engine)47 static void Delete(VideoEngine* engine) {} 48 49 /** Returns an existing or creates a new new DeviceInfo. 50 * Camera info is cached to prevent repeated lengthy polling for "realness" 51 * of the hardware devices. Other types of capture, e.g. screen share info, 52 * are cached for 1 second. This could be handled in a more elegant way in 53 * the future. 54 * @return on failure the shared_ptr will be null, otherwise it will contain 55 * a DeviceInfo. 56 * @see bug 1305212 https://bugzilla.mozilla.org/show_bug.cgi?id=1305212 57 */ 58 std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo> 59 GetOrCreateVideoCaptureDeviceInfo(); 60 61 const UniquePtr<const webrtc::Config>& GetConfiguration(); 62 63 class CaptureEntry { 64 public: 65 CaptureEntry(int32_t aCapnum, 66 rtc::scoped_refptr<webrtc::VideoCaptureModule> aCapture); 67 int32_t Capnum() const; 68 rtc::scoped_refptr<webrtc::VideoCaptureModule> VideoCapture(); 69 70 private: 71 int32_t mCapnum; 72 rtc::scoped_refptr<webrtc::VideoCaptureModule> mVideoCaptureModule; 73 friend class VideoEngine; 74 }; 75 76 // Returns true iff an entry for capnum exists 77 bool WithEntry(const int32_t entryCapnum, 78 const std::function<void(CaptureEntry& entry)>&& fn); 79 80 private: 81 explicit VideoEngine(UniquePtr<const webrtc::Config>&& aConfig); 82 int32_t mId; 83 webrtc::CaptureDeviceInfo mCaptureDevInfo; 84 std::shared_ptr<webrtc::VideoCaptureModule::DeviceInfo> mDeviceInfo; 85 UniquePtr<const webrtc::Config> mConfig; 86 std::map<int32_t, CaptureEntry> mCaps; 87 std::map<int32_t, int32_t> mIdMap; 88 // The validity period for non-camera capture device infos` 89 int64_t mExpiryTimeInMs = 0; 90 int32_t GenerateId(); 91 static int32_t sId; 92 }; 93 } // namespace camera 94 } // namespace mozilla 95 #endif 96