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1 // Copyright (c) 2013 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 PPAPI_CPP_VIDEO_FRAME_H_ | |
6 #define PPAPI_CPP_VIDEO_FRAME_H_ | |
7 | |
8 #include "ppapi/c/pp_time.h" | |
9 #include "ppapi/c/pp_video_frame.h" | |
10 #include "ppapi/cpp/completion_callback.h" | |
11 #include "ppapi/cpp/image_data.h" | |
12 #include "ppapi/cpp/pass_ref.h" | |
13 | |
14 /// @file | |
15 /// This file defines the video frame struct used by video readers and writers. | |
16 | |
17 namespace pp { | |
18 | |
19 // VideoFrame ------------------------------------------------------------------ | |
20 | |
21 /// The <code>VideoFrame</code> class represents a frame of video in a stream. | |
22 class VideoFrame { | |
23 public: | |
24 /// Default constructor for creating a <code>VideoFrame</code> object. | |
25 VideoFrame(); | |
26 | |
27 /// Constructor that takes an existing <code>PP_VideoFrame</code> structure. | |
28 /// The 'image_data' PP_Resource field in the structure will be managed by | |
29 /// this instance. | |
30 VideoFrame(PassRef, const PP_VideoFrame& pp_video_frame); | |
31 | |
32 /// Constructor that takes an existing <code>ImageData</code> instance and | |
33 /// a timestamp. | |
34 VideoFrame(const ImageData& image_data, PP_TimeTicks timestamp); | |
35 | |
36 /// The copy constructor for <code>VideoFrame</code>. | |
37 /// | |
38 /// @param[in] other A reference to a <code>VideoFrame</code>. | |
39 VideoFrame(const VideoFrame& other); | |
40 | |
41 ~VideoFrame(); | |
42 | |
43 VideoFrame& operator=(const VideoFrame& other); | |
44 | |
45 const PP_VideoFrame& pp_video_frame() const { | |
46 return video_frame_; | |
47 } | |
48 | |
49 ImageData image_data() const { | |
50 return image_data_; | |
51 } | |
52 void set_image_data(const ImageData& image_data) { | |
53 image_data_ = image_data; | |
54 // The assignment above manages the underlying PP_Resources. Copy the new | |
55 // one into our internal video frame struct. | |
56 video_frame_.image_data = image_data_.pp_resource(); | |
57 } | |
58 | |
59 PP_TimeTicks timestamp() const { return video_frame_.timestamp; } | |
60 void set_timestamp(PP_TimeTicks timestamp) { | |
61 video_frame_.timestamp = timestamp; | |
62 } | |
63 | |
64 private: | |
65 ImageData image_data_; // This manages the PP_Resource in video_frame_. | |
66 PP_VideoFrame video_frame_; | |
67 }; | |
68 | |
69 namespace internal { | |
70 | |
71 // A specialization of CallbackOutputTraits to provide the callback system the | |
72 // information on how to handle pp::VideoFrame. This converts PP_VideoFrame to | |
73 // pp::VideoFrame when passing to the plugin, and specifically manages the | |
74 // PP_Resource embedded in the video_frame_ field. | |
75 template<> | |
76 struct CallbackOutputTraits<pp::VideoFrame> { | |
77 typedef PP_VideoFrame* APIArgType; | |
78 typedef PP_VideoFrame StorageType; | |
79 | |
80 static inline APIArgType StorageToAPIArg(StorageType& t) { | |
81 return &t; | |
82 } | |
83 | |
84 static inline pp::VideoFrame StorageToPluginArg(StorageType& t) { | |
85 return pp::VideoFrame(PASS_REF, t); | |
86 } | |
87 }; | |
88 | |
89 } // namespace internal | |
90 | |
91 } // namespace pp | |
92 | |
93 #endif // PPAPI_CPP_VIDEO_FRAME_H_ | |
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