2 // Copyright 2004 Google Inc.
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are met:
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.
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.
26 #ifndef TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_
27 #define TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_
29 #ifdef HAVE_WEBRTC_VIDEO
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"
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 {
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;
55 // WebRTC-based implementation of VideoCapturer.
56 class WebRtcVideoCapturer : public VideoCapturer,
57 public webrtc::VideoCaptureDataCallback {
59 WebRtcVideoCapturer();
60 explicit WebRtcVideoCapturer(WebRtcVcmFactoryInterface* factory);
61 virtual ~WebRtcVideoCapturer();
63 bool Init(const Device& device);
64 bool Init(webrtc::VideoCaptureModule* module);
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);
71 virtual bool IsRunning();
72 virtual bool IsScreencast() const { return false; }
75 // Override virtual methods of the parent class VideoCapturer.
76 virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs);
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) {
86 virtual void OnCaptureDelayChanged(const int32_t id,
89 rtc::scoped_ptr<WebRtcVcmFactoryInterface> factory_;
90 webrtc::VideoCaptureModule* module_;
92 std::vector<uint8_t> capture_buffer_;
94 // Critical section to avoid Stop during an OnIncomingCapturedFrame callback.
95 rtc::CriticalSection critical_section_stopping_;
98 struct WebRtcCapturedFrame : public CapturedFrame {
100 WebRtcCapturedFrame(const webrtc::I420VideoFrame& frame,
101 void* buffer, int length);
104 } // namespace cricket
106 #endif // HAVE_WEBRTC_VIDEO
107 #endif // TALK_MEDIA_WEBRTCVIDEOCAPTURER_H_