i422_buffer.h (4051B)
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 API_VIDEO_I422_BUFFER_H_ 12 #define API_VIDEO_I422_BUFFER_H_ 13 14 #include <stdint.h> 15 16 #include <memory> 17 18 #include "api/scoped_refptr.h" 19 #include "api/video/video_frame_buffer.h" 20 #include "api/video/video_rotation.h" 21 #include "rtc_base/memory/aligned_malloc.h" 22 #include "rtc_base/system/rtc_export.h" 23 24 namespace webrtc { 25 26 // Plain I422 buffer in standard memory. 27 class RTC_EXPORT I422Buffer : public I422BufferInterface { 28 public: 29 static scoped_refptr<I422Buffer> Create(int width, int height); 30 static scoped_refptr<I422Buffer> Create(int width, 31 int height, 32 int stride_y, 33 int stride_u, 34 int stride_v); 35 36 // Create a new buffer and copy the pixel data. 37 static scoped_refptr<I422Buffer> Copy(const I422BufferInterface& buffer); 38 /// Convert and put I420 buffer into a new buffer. 39 static scoped_refptr<I422Buffer> Copy(const I420BufferInterface& buffer); 40 41 static scoped_refptr<I422Buffer> Copy(int width, 42 int height, 43 const uint8_t* data_y, 44 int stride_y, 45 const uint8_t* data_u, 46 int stride_u, 47 const uint8_t* data_v, 48 int stride_v); 49 50 // Returns a rotated copy of `src`. 51 static scoped_refptr<I422Buffer> Rotate(const I422BufferInterface& src, 52 VideoRotation rotation); 53 54 scoped_refptr<I420BufferInterface> ToI420() final; 55 const I420BufferInterface* GetI420() const final { return nullptr; } 56 57 // Sets the buffer to all black. 58 static void SetBlack(I422Buffer* buffer); 59 60 // Sets all three planes to all zeros. Used to work around for 61 // quirks in memory checkers 62 // (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and 63 // ffmpeg (http://crbug.com/390941). 64 // TODO(https://crbug.com/390941): Deprecated. Should be deleted if/when those 65 // issues are resolved in a better way. Or in the mean time, use SetBlack. 66 void InitializeData(); 67 68 int width() const override; 69 int height() const override; 70 const uint8_t* DataY() const override; 71 const uint8_t* DataU() const override; 72 const uint8_t* DataV() const override; 73 74 int StrideY() const override; 75 int StrideU() const override; 76 int StrideV() const override; 77 78 uint8_t* MutableDataY(); 79 uint8_t* MutableDataU(); 80 uint8_t* MutableDataV(); 81 82 // Scale the cropped area of `src` to the size of `this` buffer, and 83 // write the result into `this`. 84 void CropAndScaleFrom(const I422BufferInterface& src, 85 int offset_x, 86 int offset_y, 87 int crop_width, 88 int crop_height); 89 90 // The common case of a center crop, when needed to adjust the 91 // aspect ratio without distorting the image. 92 void CropAndScaleFrom(const I422BufferInterface& src); 93 94 // Scale all of `src` to the size of `this` buffer, with no cropping. 95 void ScaleFrom(const I422BufferInterface& src); 96 97 protected: 98 I422Buffer(int width, int height); 99 I422Buffer(int width, int height, int stride_y, int stride_u, int stride_v); 100 101 ~I422Buffer() override; 102 103 private: 104 const int width_; 105 const int height_; 106 const int stride_y_; 107 const int stride_u_; 108 const int stride_v_; 109 const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_; 110 }; 111 112 } // namespace webrtc 113 114 #endif // API_VIDEO_I422_BUFFER_H_