1 // libjingle 2 // Copyright 2004 Google Inc. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are met: 6 // 7 // 1. Redistributions of source code must retain the above copyright notice, 8 // this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright notice, 10 // this list of conditions and the following disclaimer in the documentation 11 // and/or other materials provided with the distribution. 12 // 3. The name of the author may not be used to endorse or promote products 13 // derived from this software without specific prior written permission. 14 // 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 26 #ifndef TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 27 #define TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 28 29 #ifdef HAVE_WEBRTC_VIDEO 30 31 #include <string> 32 #include <vector> 33 34 #include "talk/media/base/videocapturer.h" 35 #include "talk/media/webrtc/webrtcvideoframe.h" 36 #include "webrtc/base/criticalsection.h" 37 #include "webrtc/base/messagehandler.h" 38 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" 39 #include "webrtc/modules/video_capture/include/video_capture.h" 40 41 namespace cricket { 42 43 // Factory to allow injection of a VCM impl into WebRtcVideoCapturer. 44 // DeviceInfos do not have a Release() and therefore need an explicit Destroy(). 45 class WebRtcVcmFactoryInterface { 46 public: ~WebRtcVcmFactoryInterface()47 virtual ~WebRtcVcmFactoryInterface() {} 48 virtual webrtc::VideoCaptureModule* Create( 49 int id, const char* device) = 0; 50 virtual webrtc::VideoCaptureModule::DeviceInfo* CreateDeviceInfo(int id) = 0; 51 virtual void DestroyDeviceInfo( 52 webrtc::VideoCaptureModule::DeviceInfo* info) = 0; 53 }; 54 55 // WebRTC-based implementation of VideoCapturer. 56 class WebRtcVideoCapturer : public VideoCapturer, 57 public webrtc::VideoCaptureDataCallback { 58 public: 59 WebRtcVideoCapturer(); 60 explicit WebRtcVideoCapturer(WebRtcVcmFactoryInterface* factory); 61 virtual ~WebRtcVideoCapturer(); 62 63 bool Init(const Device& device); 64 bool Init(webrtc::VideoCaptureModule* module); 65 66 // Override virtual methods of the parent class VideoCapturer. 67 virtual bool GetBestCaptureFormat(const VideoFormat& desired, 68 VideoFormat* best_format); 69 virtual CaptureState Start(const VideoFormat& capture_format); 70 virtual void Stop(); 71 virtual bool IsRunning(); IsScreencast()72 virtual bool IsScreencast() const { return false; } 73 74 protected: 75 // Override virtual methods of the parent class VideoCapturer. 76 virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs); 77 78 private: 79 // Callback when a frame is captured by camera. 80 virtual void OnIncomingCapturedFrame(const int32_t id, 81 webrtc::I420VideoFrame& frame); OnIncomingCapturedEncodedFrame(const int32_t id,webrtc::VideoFrame & frame,webrtc::VideoCodecType codec_type)82 virtual void OnIncomingCapturedEncodedFrame(const int32_t id, 83 webrtc::VideoFrame& frame, 84 webrtc::VideoCodecType codec_type) { 85 } 86 virtual void OnCaptureDelayChanged(const int32_t id, 87 const int32_t delay); 88 89 rtc::scoped_ptr<WebRtcVcmFactoryInterface> factory_; 90 webrtc::VideoCaptureModule* module_; 91 int captured_frames_; 92 std::vector<uint8_t> capture_buffer_; 93 94 // Critical section to avoid Stop during an OnIncomingCapturedFrame callback. 95 rtc::CriticalSection critical_section_stopping_; 96 }; 97 98 struct WebRtcCapturedFrame : public CapturedFrame { 99 public: 100 WebRtcCapturedFrame(const webrtc::I420VideoFrame& frame, 101 void* buffer, int length); 102 }; 103 104 } // namespace cricket 105 106 #endif // HAVE_WEBRTC_VIDEO 107 #endif // TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_ 108