1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_
6 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_
10 #include "base/compiler_specific.h"
11 #include "content/common/content_export.h"
12 #include "media/base/video_frame.h"
13 #include "media/video/capture/video_capture_types.h"
14 #include "third_party/libjingle/source/talk/media/base/videocapturer.h"
18 // WebRtcVideoCapturerAdapter implements a simple cricket::VideoCapturer that is
19 // used for VideoCapturing in libJingle and especially in PeerConnections.
20 // The class is created and destroyed on the main render thread.
21 // PeerConnection access cricket::VideoCapturer from a libJingle worker thread.
22 class CONTENT_EXPORT WebRtcVideoCapturerAdapter
23 : NON_EXPORTED_BASE(public cricket::VideoCapturer) {
25 explicit WebRtcVideoCapturerAdapter(bool is_screencast);
26 virtual ~WebRtcVideoCapturerAdapter();
28 // Sets the requested format. cricket::VideoCapturer may try to scale or
29 // crop to this format if the frame delivered in OnFrameCaptured is not in
31 // This method is virtual for testing purposes.
32 virtual void SetRequestedFormat(const media::VideoCaptureFormat& format);
34 // This method is virtual for testing purposes.
35 virtual void OnFrameCaptured(const scoped_refptr<media::VideoFrame>& frame);
38 // cricket::VideoCapturer implementation.
39 // These methods are accessed from a libJingle worker thread.
40 virtual cricket::CaptureState Start(
41 const cricket::VideoFormat& capture_format) OVERRIDE;
42 virtual void Stop() OVERRIDE;
43 virtual bool IsRunning() OVERRIDE;
44 virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs) OVERRIDE;
45 virtual bool GetBestCaptureFormat(const cricket::VideoFormat& desired,
46 cricket::VideoFormat* best_format) OVERRIDE;
47 virtual bool IsScreencast() const OVERRIDE;
49 void UpdateI420Buffer(const scoped_refptr<media::VideoFrame>& src);
52 const bool is_screencast_;
54 base::TimeDelta first_frame_timestamp_;
55 // |buffer_| used if cropping is needed. It is created only if needed and
56 // owned by WebRtcVideoCapturerAdapter. If its created, it exists until
57 // WebRtcVideoCapturerAdapter is destroyed.
60 scoped_ptr<cricket::CapturedFrame> captured_frame_;
62 DISALLOW_COPY_AND_ASSIGN(WebRtcVideoCapturerAdapter);
65 } // namespace content
67 #endif // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_