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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 WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_FRAME_H_ | |
6 #define WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_FRAME_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/compiler_specific.h" | |
10 #include "webkit/media/crypto/ppapi/content_decryption_module.h" | |
11 | |
12 namespace webkit_media { | |
13 | |
14 // Allocates storage for video frames using cdm::Allocator, and contains all | |
15 // the information necessary to read and write the video frame data. | |
16 class FFmpegCdmVideoFrame { | |
17 public: | |
18 ~FFmpegCdmVideoFrame(); | |
19 | |
20 // Returns a pointer to FFmpegCdmVideoFrame of the specified |format| and | |
21 // |size|. Returns NULL on failure. | |
22 static FFmpegCdmVideoFrame* Create(cdm::Allocator* allocator, | |
23 cdm::VideoFormat format, | |
24 const cdm::Size& size); | |
25 | |
26 cdm::VideoFormat format() const { return format_; } | |
27 cdm::Buffer* frame_buffer() { return frame_buffer_; } | |
28 const cdm::Size& size() const { return size_; } | |
29 | |
30 int32_t plane_offset(cdm::VideoFrame::VideoPlane plane) const; | |
31 int32_t stride(cdm::VideoFrame::VideoPlane plane) const; | |
32 | |
33 // Returns true when |format| and |data_size| can be used to create a valid | |
34 // FFmpegCdmVideoFrame. | |
35 static bool IsValidConfig(cdm::VideoFormat format, | |
36 const cdm::Size& data_size); | |
37 | |
38 // Transfers ownership of |frame_buffer_| to |target|, and copies all video | |
39 // frame meta data stored in FFmpegCdmVideoFrame. | |
40 void MoveVideoFrame(cdm::VideoFrame* target); | |
ddorwin
2012/10/17 03:18:20
Export, Extract, Convert, Transfer, ...?
Tom Finegan
2012/10/17 04:25:29
Transfer works. Done.
| |
41 | |
42 private: | |
43 // Clients must use the static Create() method to create a new frame. | |
44 FFmpegCdmVideoFrame(cdm::VideoFormat format, const cdm::Size& size); | |
45 | |
46 // Allocates a YUV video frame buffer of type |format_| using |size_|. | |
47 // Returns true when the frame buffer is successfully allocated. Returns | |
48 // false otherwise. | |
49 bool AllocateYuv(cdm::Allocator* allocator); | |
50 | |
51 // The video buffer format. | |
52 cdm::VideoFormat format_; | |
53 | |
54 // Width and height of the video frame. | |
55 cdm::Size size_; | |
56 | |
57 // The video frame buffer. Owned by FFmpegCdmVideoFrame until | |
58 // ReleaseCdmBuffer() is called. | |
59 cdm::Buffer* frame_buffer_; | |
60 | |
61 // Array of data pointers to each plane in the video frame buffer. | |
62 int32_t plane_offsets_[cdm::VideoFrame::kMaxPlanes]; | |
63 | |
64 // Array of strides for each plane, typically greater or equal to the width | |
65 // of the surface divided by the horizontal sampling period. Note that | |
66 // strides can be negative. | |
67 int32_t strides_[cdm::VideoFrame::kMaxPlanes]; | |
68 | |
69 DISALLOW_COPY_AND_ASSIGN(FFmpegCdmVideoFrame); | |
70 }; | |
71 | |
72 } // namespace webkit_media | |
73 | |
74 #endif // WEBKIT_MEDIA_CRYPTO_PPAPI_FFMPEG_CDM_VIDEO_FRAME_H_ | |
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