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| 1 /* |
| 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ |
| 10 |
| 11 #ifndef WEBRTC_API_VIDEO_I420_BUFFER_H_ |
| 12 #define WEBRTC_API_VIDEO_I420_BUFFER_H_ |
| 13 |
| 14 #include <memory> |
| 15 |
| 16 #include "webrtc/api/video/video_rotation.h" |
| 17 #include "webrtc/api/video/video_frame_buffer.h" |
| 18 #include "webrtc/system_wrappers/include/aligned_malloc.h" |
| 19 |
| 20 namespace webrtc { |
| 21 |
| 22 // Plain I420 buffer in standard memory. |
| 23 class I420Buffer : public VideoFrameBuffer { |
| 24 public: |
| 25 static rtc::scoped_refptr<I420Buffer> Create(int width, int height); |
| 26 static rtc::scoped_refptr<I420Buffer> Create(int width, |
| 27 int height, |
| 28 int stride_y, |
| 29 int stride_u, |
| 30 int stride_v); |
| 31 |
| 32 // Create a new buffer and copy the pixel data. |
| 33 static rtc::scoped_refptr<I420Buffer> Copy(const VideoFrameBuffer& buffer); |
| 34 |
| 35 static rtc::scoped_refptr<I420Buffer> Copy( |
| 36 int width, int height, |
| 37 const uint8_t* data_y, int stride_y, |
| 38 const uint8_t* data_u, int stride_u, |
| 39 const uint8_t* data_v, int stride_v); |
| 40 |
| 41 // Returns a rotated copy of |src|. |
| 42 static rtc::scoped_refptr<I420Buffer> Rotate(const VideoFrameBuffer& src, |
| 43 VideoRotation rotation); |
| 44 |
| 45 // Sets the buffer to all black. |
| 46 static void SetBlack(I420Buffer* buffer); |
| 47 |
| 48 // Sets all three planes to all zeros. Used to work around for |
| 49 // quirks in memory checkers |
| 50 // (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and |
| 51 // ffmpeg (http://crbug.com/390941). |
| 52 // TODO(nisse): Deprecated. Should be deleted if/when those issues |
| 53 // are resolved in a better way. Or in the mean time, use SetBlack. |
| 54 void InitializeData(); |
| 55 |
| 56 // TODO(nisse): Deprecated, use static method instead. |
| 57 void SetToBlack() { SetBlack(this); } |
| 58 |
| 59 int width() const override; |
| 60 int height() const override; |
| 61 const uint8_t* DataY() const override; |
| 62 const uint8_t* DataU() const override; |
| 63 const uint8_t* DataV() const override; |
| 64 |
| 65 int StrideY() const override; |
| 66 int StrideU() const override; |
| 67 int StrideV() const override; |
| 68 |
| 69 void* native_handle() const override; |
| 70 rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override; |
| 71 |
| 72 uint8_t* MutableDataY(); |
| 73 uint8_t* MutableDataU(); |
| 74 uint8_t* MutableDataV(); |
| 75 |
| 76 // Scale the cropped area of |src| to the size of |this| buffer, and |
| 77 // write the result into |this|. |
| 78 void CropAndScaleFrom(const VideoFrameBuffer& src, |
| 79 int offset_x, |
| 80 int offset_y, |
| 81 int crop_width, |
| 82 int crop_height); |
| 83 |
| 84 // The common case of a center crop, when needed to adjust the |
| 85 // aspect ratio without distorting the image. |
| 86 void CropAndScaleFrom(const VideoFrameBuffer& src); |
| 87 |
| 88 // Scale all of |src| to the size of |this| buffer, with no cropping. |
| 89 void ScaleFrom(const VideoFrameBuffer& src); |
| 90 |
| 91 // TODO(nisse): Deprecated, delete once downstream applications are updated. |
| 92 // Returns a rotated versions of |src|. Native buffers are not |
| 93 // supported. The reason this function doesn't return an I420Buffer, |
| 94 // is that it returns |src| unchanged in case |rotation| is zero. |
| 95 static rtc::scoped_refptr<VideoFrameBuffer> Rotate( |
| 96 rtc::scoped_refptr<VideoFrameBuffer> src, |
| 97 VideoRotation rotation); |
| 98 |
| 99 protected: |
| 100 I420Buffer(int width, int height); |
| 101 I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v); |
| 102 |
| 103 ~I420Buffer() override; |
| 104 |
| 105 private: |
| 106 const int width_; |
| 107 const int height_; |
| 108 const int stride_y_; |
| 109 const int stride_u_; |
| 110 const int stride_v_; |
| 111 const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_; |
| 112 }; |
| 113 |
| 114 } // namespace webrtc |
| 115 |
| 116 #endif // WEBRTC_API_VIDEO_I420_BUFFER_H_ |
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