1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_
#define CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "media/video/capture/video_capture_device.h"
namespace content {
class ContentVideoCaptureDeviceCore;
// A virtualized VideoCaptureDevice that mirrors the displayed contents of a
// WebContents (i.e., the composition of an entire render frame tree), producing
// a stream of video frames.
//
// An instance is created by providing a device_id. The device_id contains
// information necessary for finding a WebContents instance. From then on,
// WebContentsVideoCaptureDevice will capture from the RenderWidgetHost that
// encompasses the currently active RenderFrameHost tree for that that
// WebContents instance. As the RenderFrameHost tree mutates (e.g., due to page
// navigations, or crashes/reloads), capture will continue without interruption.
class CONTENT_EXPORT WebContentsVideoCaptureDevice
: public media::VideoCaptureDevice {
public:
// Create a WebContentsVideoCaptureDevice instance from the given
// |device_id|. Returns NULL if |device_id| is invalid.
static media::VideoCaptureDevice* Create(const std::string& device_id);
~WebContentsVideoCaptureDevice() override;
// VideoCaptureDevice implementation.
void AllocateAndStart(const media::VideoCaptureParams& params,
scoped_ptr<Client> client) override;
void StopAndDeAllocate() override;
private:
WebContentsVideoCaptureDevice(
int render_process_id, int main_render_frame_id);
const scoped_ptr<ContentVideoCaptureDeviceCore> core_;
DISALLOW_COPY_AND_ASSIGN(WebContentsVideoCaptureDevice);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_VIDEO_CAPTURE_DEVICE_H_
|
