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// Implement a DirectShow sink filter used for receiving captured frames from
6// a DirectShow Capture filter.
7
8#ifndef MEDIA_VIDEO_CAPTURE_WIN_SINK_FILTER_WIN_H_
9#define MEDIA_VIDEO_CAPTURE_WIN_SINK_FILTER_WIN_H_
10
11#include <windows.h>
12
13#include "base/memory/ref_counted.h"
14#include "media/video/capture/video_capture_device.h"
15#include "media/video/capture/video_capture_types.h"
16#include "media/video/capture/win/filter_base_win.h"
17#include "media/video/capture/win/sink_filter_observer_win.h"
18
19namespace media {
20
21// Define GUID for I420. This is the color format we would like to support but
22// it is not defined in the DirectShow SDK.
23// http://msdn.microsoft.com/en-us/library/dd757532.aspx
24// 30323449-0000-0010-8000-00AA00389B71.
25extern GUID kMediaSubTypeI420;
26
27// UYVY synonym with BT709 color components, used in HD video. This variation
28// might appear in non-USB capture cards and it's implemented as a normal YUV
29// pixel format with the characters HDYC encoded in the first array word.
30extern GUID kMediaSubTypeHDYC;
31
32class SinkInputPin;
33
34class __declspec(uuid("88cdbbdc-a73b-4afa-acbf-15d5e2ce12c3"))
35    SinkFilter : public FilterBase {
36 public:
37  explicit SinkFilter(SinkFilterObserver* observer);
38  virtual ~SinkFilter();
39
40  void SetRequestedMediaFormat(const VideoCaptureFormat& format);
41  // Returns the format that is negotiated when this
42  // filter is connected to a media filter.
43  const VideoCaptureFormat& ResultingFormat();
44
45  // Implement FilterBase.
46  virtual size_t NoOfPins();
47  virtual IPin* GetPin(int index);
48
49  STDMETHOD(GetClassID)(CLSID* clsid);
50
51 private:
52  scoped_refptr<SinkInputPin> input_pin_;
53
54  DISALLOW_IMPLICIT_CONSTRUCTORS(SinkFilter);
55};
56
57}  // namespace media
58
59#endif  // MEDIA_VIDEO_CAPTURE_WIN_SINK_FILTER_WIN_H_
60