1 /* 2 * libjingle 3 * Copyright 2004 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 29 #define TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 30 31 #ifdef HAVE_WEBRTC_VIDEO 32 33 #include <string> 34 #include <vector> 35 36 #include "talk/media/base/videocapturer.h" 37 #include "talk/media/webrtc/webrtcvideoframe.h" 38 #include "webrtc/base/asyncinvoker.h" 39 #include "webrtc/base/messagehandler.h" 40 #include "webrtc/base/scoped_ptr.h" 41 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" 42 #include "webrtc/modules/video_capture/video_capture.h" 43 44 namespace cricket { 45 46 // Factory to allow injection of a VCM impl into WebRtcVideoCapturer. 47 // DeviceInfos do not have a Release() and therefore need an explicit Destroy(). 48 class WebRtcVcmFactoryInterface { 49 public: ~WebRtcVcmFactoryInterface()50 virtual ~WebRtcVcmFactoryInterface() {} 51 virtual webrtc::VideoCaptureModule* Create( 52 int id, const char* device) = 0; 53 virtual webrtc::VideoCaptureModule::DeviceInfo* CreateDeviceInfo(int id) = 0; 54 virtual void DestroyDeviceInfo( 55 webrtc::VideoCaptureModule::DeviceInfo* info) = 0; 56 }; 57 58 // WebRTC-based implementation of VideoCapturer. 59 class WebRtcVideoCapturer : public VideoCapturer, 60 public webrtc::VideoCaptureDataCallback { 61 public: 62 WebRtcVideoCapturer(); 63 explicit WebRtcVideoCapturer(WebRtcVcmFactoryInterface* factory); 64 virtual ~WebRtcVideoCapturer(); 65 66 bool Init(const Device& device); 67 bool Init(webrtc::VideoCaptureModule* module); 68 69 // Override virtual methods of the parent class VideoCapturer. 70 virtual bool GetBestCaptureFormat(const VideoFormat& desired, 71 VideoFormat* best_format); 72 virtual CaptureState Start(const VideoFormat& capture_format); 73 virtual void Stop(); 74 virtual bool IsRunning(); IsScreencast()75 virtual bool IsScreencast() const { return false; } 76 virtual bool SetApplyRotation(bool enable); 77 78 protected: 79 // Override virtual methods of the parent class VideoCapturer. 80 virtual bool GetPreferredFourccs(std::vector<uint32_t>* fourccs); 81 82 private: 83 // Callback when a frame is captured by camera. 84 virtual void OnIncomingCapturedFrame(const int32_t id, 85 const webrtc::VideoFrame& frame); 86 virtual void OnCaptureDelayChanged(const int32_t id, 87 const int32_t delay); 88 89 // Used to signal captured frames on the same thread as invoked Start(). 90 // With WebRTC's current VideoCapturer implementations, this will mean a 91 // thread hop, but in other implementations (e.g. Chrome) it will be called 92 // directly from OnIncomingCapturedFrame. 93 // TODO(tommi): Remove this workaround when we've updated the WebRTC capturers 94 // to follow the same contract. 95 void SignalFrameCapturedOnStartThread(const webrtc::VideoFrame& frame); 96 97 rtc::scoped_ptr<WebRtcVcmFactoryInterface> factory_; 98 webrtc::VideoCaptureModule* module_; 99 int captured_frames_; 100 std::vector<uint8_t> capture_buffer_; 101 rtc::Thread* start_thread_; // Set in Start(), unset in Stop(); 102 103 rtc::scoped_ptr<rtc::AsyncInvoker> async_invoker_; 104 }; 105 106 struct WebRtcCapturedFrame : public CapturedFrame { 107 public: 108 WebRtcCapturedFrame(const webrtc::VideoFrame& frame, 109 void* buffer, 110 size_t length); 111 }; 112 113 } // namespace cricket 114 115 #endif // HAVE_WEBRTC_VIDEO 116 #endif // TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 117