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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ | 5 #ifndef CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ |
6 #define CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ | 6 #define CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 #include <string> | 9 #include <string> |
10 | 10 |
11 #include "base/macros.h" | 11 #include "base/macros.h" |
12 #include "content/common/content_export.h" | 12 #include "content/common/content_export.h" |
13 #include "media/capture/content/screen_capture_device_core.h" | 13 #include "media/capture/content/screen_capture_device_core.h" |
14 #include "media/capture/video/video_capture_device.h" | 14 #include "media/capture/video/video_capture_device.h" |
15 | 15 |
16 namespace content { | 16 namespace content { |
17 | 17 |
18 // A virtualized VideoCaptureDevice that mirrors the displayed contents of a | 18 // A virtualized VideoCaptureDevice that captures the displayed contents of a |
19 // WebContents (i.e., the composition of an entire render frame tree), producing | 19 // WebContents (i.e., the composition of an entire render frame tree), producing |
20 // a stream of video frames. | 20 // a stream of video frames. As such, WebContentsVideoCaptureDevice is only |
| 21 // supported on platforms that use the Chromium compositor, have a |
| 22 // content::RenderWidgetHostView implementation that supports frame subscription |
| 23 // (via BeginFrameSubscription()), and can perform read-back into |
| 24 // media::VideoFrames (i.e., |
| 25 // RenderWidgetHostViewBase::CopyFromCompositingSurfaceToVideoFrame() is |
| 26 // functional). |
21 // | 27 // |
22 // An instance is created by providing a device_id. The device_id contains | 28 // An instance is created by providing a device_id. The device_id contains |
23 // information necessary for finding a WebContents instance. From then on, | 29 // information necessary for finding a WebContents instance. From then on, |
24 // WebContentsVideoCaptureDevice will capture from the RenderWidgetHost that | 30 // WebContentsVideoCaptureDevice will capture from the RenderWidgetHost that |
25 // encompasses the currently active RenderFrameHost tree for that that | 31 // encompasses the currently active RenderFrameHost tree for that that |
26 // WebContents instance. As the RenderFrameHost tree mutates (e.g., due to page | 32 // WebContents instance. As the RenderFrameHost tree mutates (e.g., due to page |
27 // navigations, or crashes/reloads), capture will continue without interruption. | 33 // navigations, or crashes/reloads), capture will continue without interruption. |
28 class CONTENT_EXPORT WebContentsVideoCaptureDevice | 34 class CONTENT_EXPORT WebContentsVideoCaptureDevice |
29 : public media::VideoCaptureDevice { | 35 : public media::VideoCaptureDevice { |
30 public: | 36 public: |
(...skipping 21 matching lines...) Expand all Loading... |
52 | 58 |
53 const std::unique_ptr<media::ScreenCaptureDeviceCore> core_; | 59 const std::unique_ptr<media::ScreenCaptureDeviceCore> core_; |
54 | 60 |
55 DISALLOW_COPY_AND_ASSIGN(WebContentsVideoCaptureDevice); | 61 DISALLOW_COPY_AND_ASSIGN(WebContentsVideoCaptureDevice); |
56 }; | 62 }; |
57 | 63 |
58 | 64 |
59 } // namespace content | 65 } // namespace content |
60 | 66 |
61 #endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ | 67 #endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_ |
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