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
3// found in the LICENSE file.
4
5#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
6#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
7
8#include "base/memory/shared_memory.h"
9#include "base/time/time.h"
10#include "content/common/content_export.h"
11
12namespace gpu {
13struct MailboxHolder;
14}  // namespace gpu
15
16namespace media {
17class VideoCaptureFormat;
18}  // namespace media
19
20namespace content {
21
22// ID used for identifying an object of VideoCaptureController.
23struct CONTENT_EXPORT VideoCaptureControllerID {
24  explicit VideoCaptureControllerID(int device_id);
25
26  bool operator<(const VideoCaptureControllerID& vc) const;
27  bool operator==(const VideoCaptureControllerID& vc) const;
28
29  int device_id;
30};
31
32// VideoCaptureControllerEventHandler is the interface for
33// VideoCaptureController to notify clients about the events such as
34// BufferReady, FrameInfo, Error, etc.
35class CONTENT_EXPORT VideoCaptureControllerEventHandler {
36 public:
37  // An Error has occurred in the VideoCaptureDevice.
38  virtual void OnError(const VideoCaptureControllerID& id) = 0;
39
40  // A buffer has been newly created.
41  virtual void OnBufferCreated(const VideoCaptureControllerID& id,
42                               base::SharedMemoryHandle handle,
43                               int length,
44                               int buffer_id) = 0;
45
46  // A previously created buffer has been freed and will no longer be used.
47  virtual void OnBufferDestroyed(const VideoCaptureControllerID& id,
48                                 int buffer_id) = 0;
49
50  // A buffer has been filled with I420 video.
51  virtual void OnBufferReady(const VideoCaptureControllerID& id,
52                             int buffer_id,
53                             const media::VideoCaptureFormat& format,
54                             base::TimeTicks timestamp) = 0;
55
56  // A texture mailbox buffer has been filled with data.
57  virtual void OnMailboxBufferReady(const VideoCaptureControllerID& id,
58                                    int buffer_id,
59                                    const gpu::MailboxHolder& mailbox_holder,
60                                    const media::VideoCaptureFormat& format,
61                                    base::TimeTicks timestamp) = 0;
62
63  // The capture session has ended and no more frames will be sent.
64  virtual void OnEnded(const VideoCaptureControllerID& id) = 0;
65
66 protected:
67  virtual ~VideoCaptureControllerEventHandler() {}
68};
69
70}  // namespace content
71
72#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
73