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Side by Side Diff: media/video/capture/win/pin_base_win.h

Issue 7229013: This is the VideoCaptureDevice implementation for windows. (Closed) Base URL: http://src.chromium.org/svn/trunk/src/
Patch Set: Fixed reference count issue found by Tommi. Created 9 years, 6 months ago
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1 // Copyright (c) 2011 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 simple base class for a DirectShow input pin. It may only be
6 // used in a single threaded apartment.
7
8 #ifndef MEDIA_VIDEO_CAPTURE_WIN_PIN_BASE_WIN_H_
9 #define MEDIA_VIDEO_CAPTURE_WIN_PIN_BASE_WIN_H_
10 #pragma once
11
12 // Avoid including strsafe.h via dshow as it will cause build warnings.
13 #define NO_DSHOW_STRSAFE
14 #include <dshow.h>
15
16 #include "base/memory/ref_counted.h"
17 #include "base/win/scoped_comptr.h"
18
19 namespace media {
20
21 class PinBase : public IPin,
scherkus (not reviewing) 2011/06/27 19:24:01 it: style should be same as initializer list (drop
Per K 2011/06/28 10:14:07 Done.
22 public IMemInputPin,
23 public base::RefCounted<PinBase> {
24 public:
25 explicit PinBase(IBaseFilter* owner);
26 virtual ~PinBase();
27
28 // Function used for changing the owner.
29 // If the owner is deleted the owner should first call this function
30 // with owner = NULL.
31 void SetOwner(IBaseFilter* owner);
32
33 // Checks if a media type is acceptable. This is called when this pin is
34 // connected to an output pin. Must return true if the media type is
35 // acceptable, false otherwise.
36 virtual bool IsMediaTypeValid(const AM_MEDIA_TYPE* media_type) = 0;
37
38 // Enumerates valid media types.
39 virtual bool GetValidMediaType(int index, AM_MEDIA_TYPE* media_type) = 0;
40
41 // Called when new media is received. Note that this is not on the same
42 // thread as where the pin is created.
43 STDMETHOD(Receive)(IMediaSample* pSample) = 0;
44
45 STDMETHOD(Connect)(IPin* pReceivePin, const AM_MEDIA_TYPE* pmt);
46
47 STDMETHOD(ReceiveConnection)(IPin* pConnector, const AM_MEDIA_TYPE* pmt);
48
49 STDMETHOD(Disconnect)();
50
51 STDMETHOD(ConnectedTo)(IPin** pin);
52
53 STDMETHOD(ConnectionMediaType)(AM_MEDIA_TYPE* pmt);
54
55 STDMETHOD(QueryPinInfo)(PIN_INFO* info);
56
57 STDMETHOD(QueryDirection)(PIN_DIRECTION* pin_dir);
58
59 STDMETHOD(QueryId)(LPWSTR* id);
60
61 STDMETHOD(QueryAccept)(const AM_MEDIA_TYPE* mt);
62
63 STDMETHOD(EnumMediaTypes)(IEnumMediaTypes** types);
64
65 STDMETHOD(QueryInternalConnections)(IPin** pin, ULONG* no_pins);
66
67 STDMETHOD(EndOfStream)();
68
69 STDMETHOD(BeginFlush)();
70
71 STDMETHOD(EndFlush)();
72
73 STDMETHOD(NewSegment)(REFERENCE_TIME start,
74 REFERENCE_TIME stop,
75 double dRate);
76
77 // Inherited from IMemInputPin.
78 STDMETHOD(GetAllocator)(IMemAllocator** allocator);
79
80 STDMETHOD(NotifyAllocator)(IMemAllocator* allocator, BOOL read_only);
81
82 STDMETHOD(GetAllocatorRequirements)(ALLOCATOR_PROPERTIES* properties);
83
84 STDMETHOD(ReceiveMultiple)(IMediaSample** samples,
85 long sample_count,
86 long* processed);
87 STDMETHOD(ReceiveCanBlock)();
88
89 // Inherited from IUnknown.
90 STDMETHOD(QueryInterface)(REFIID id, void** object_ptr);
91
92 STDMETHOD_(ULONG, AddRef)();
93
94 STDMETHOD_(ULONG, Release)();
95
96 private:
97 AM_MEDIA_TYPE current_media_type_;
98 base::win::ScopedComPtr<IPin> connected_pin_;
99 // owner_ is the filter owning this pin. We don't reference count it since
100 // that would create a circular reference count.
101 IBaseFilter* owner_;
102 };
103
104 } // namespace media
105
106 #endif // MEDIA_VIDEO_CAPTURE_WIN_PIN_BASE_WIN_H_
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