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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: | |
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(); | |
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_ | |
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