1 /* 2 * libjingle 3 * Copyright 2012 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 // This file contains the class CaptureRenderAdapter. The class connects a 29 // VideoCapturer to any number of VideoRenders such that the former feeds the 30 // latter. 31 // CaptureRenderAdapter is Thread-unsafe. This means that none of its APIs may 32 // be called concurrently. 33 34 #ifndef TALK_MEDIA_BASE_CAPTURERENDERADAPTER_H_ 35 #define TALK_MEDIA_BASE_CAPTURERENDERADAPTER_H_ 36 37 #include <vector> 38 39 #include "talk/media/base/videocapturer.h" 40 #include "webrtc/base/criticalsection.h" 41 #include "webrtc/base/sigslot.h" 42 43 namespace cricket { 44 45 class VideoCapturer; 46 class VideoProcessor; 47 class VideoRenderer; 48 49 class CaptureRenderAdapter : public sigslot::has_slots<> { 50 public: 51 static CaptureRenderAdapter* Create(VideoCapturer* video_capturer); 52 ~CaptureRenderAdapter(); 53 54 bool AddRenderer(VideoRenderer* video_renderer); 55 bool RemoveRenderer(VideoRenderer* video_renderer); 56 video_capturer()57 VideoCapturer* video_capturer() { return video_capturer_; } 58 private: 59 struct VideoRendererInfo { VideoRendererInfoVideoRendererInfo60 explicit VideoRendererInfo(VideoRenderer* r) 61 : renderer(r), 62 render_width(0), 63 render_height(0) { 64 } 65 VideoRenderer* renderer; 66 size_t render_width; 67 size_t render_height; 68 }; 69 70 // Just pointers since ownership is not handed over to this class. 71 typedef std::vector<VideoRendererInfo> VideoRenderers; 72 73 explicit CaptureRenderAdapter(VideoCapturer* video_capturer); 74 void Init(); 75 76 // Callback for frames received from the capturer. 77 void OnVideoFrame(VideoCapturer* capturer, const VideoFrame* video_frame); 78 79 void MaybeSetRenderingSize(const VideoFrame* frame); 80 81 bool IsRendererRegistered(const VideoRenderer& video_renderer) const; 82 83 VideoRenderers video_renderers_; 84 VideoCapturer* video_capturer_; 85 // Critical section synchronizing the capture thread. 86 mutable rtc::CriticalSection capture_crit_; 87 }; 88 89 } // namespace cricket 90 91 #endif // TALK_MEDIA_BASE_CAPTURERENDERADAPTER_H_ 92