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 41namespace 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(). 45class WebRtcVcmFactoryInterface { 46 public: 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. 56class 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(); 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); 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 98struct 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