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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 PassVideoFrame(cdm::VideoFrame* target); |
| 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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