1 /* 2 * Copyright 2011 The LibYuv 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 INCLUDE_LIBYUV_SCALE_H_ 12 #define INCLUDE_LIBYUV_SCALE_H_ 13 14 #include "libyuv/basic_types.h" 15 16 #ifdef __cplusplus 17 namespace libyuv { 18 extern "C" { 19 #endif 20 21 // Supported filtering. 22 typedef enum FilterMode { 23 kFilterNone = 0, // Point sample; Fastest. 24 kFilterLinear = 1, // Filter horizontally only. 25 kFilterBilinear = 2, // Faster than box, but lower quality scaling down. 26 kFilterBox = 3 // Highest quality. 27 } FilterModeEnum; 28 29 // Scale a YUV plane. 30 LIBYUV_API 31 void ScalePlane(const uint8* src, 32 int src_stride, 33 int src_width, 34 int src_height, 35 uint8* dst, 36 int dst_stride, 37 int dst_width, 38 int dst_height, 39 enum FilterMode filtering); 40 41 LIBYUV_API 42 void ScalePlane_16(const uint16* src, 43 int src_stride, 44 int src_width, 45 int src_height, 46 uint16* dst, 47 int dst_stride, 48 int dst_width, 49 int dst_height, 50 enum FilterMode filtering); 51 52 // Scales a YUV 4:2:0 image from the src width and height to the 53 // dst width and height. 54 // If filtering is kFilterNone, a simple nearest-neighbor algorithm is 55 // used. This produces basic (blocky) quality at the fastest speed. 56 // If filtering is kFilterBilinear, interpolation is used to produce a better 57 // quality image, at the expense of speed. 58 // If filtering is kFilterBox, averaging is used to produce ever better 59 // quality image, at further expense of speed. 60 // Returns 0 if successful. 61 62 LIBYUV_API 63 int I420Scale(const uint8* src_y, 64 int src_stride_y, 65 const uint8* src_u, 66 int src_stride_u, 67 const uint8* src_v, 68 int src_stride_v, 69 int src_width, 70 int src_height, 71 uint8* dst_y, 72 int dst_stride_y, 73 uint8* dst_u, 74 int dst_stride_u, 75 uint8* dst_v, 76 int dst_stride_v, 77 int dst_width, 78 int dst_height, 79 enum FilterMode filtering); 80 81 LIBYUV_API 82 int I420Scale_16(const uint16* src_y, 83 int src_stride_y, 84 const uint16* src_u, 85 int src_stride_u, 86 const uint16* src_v, 87 int src_stride_v, 88 int src_width, 89 int src_height, 90 uint16* dst_y, 91 int dst_stride_y, 92 uint16* dst_u, 93 int dst_stride_u, 94 uint16* dst_v, 95 int dst_stride_v, 96 int dst_width, 97 int dst_height, 98 enum FilterMode filtering); 99 100 #ifdef __cplusplus 101 // Legacy API. Deprecated. 102 LIBYUV_API 103 int Scale(const uint8* src_y, 104 const uint8* src_u, 105 const uint8* src_v, 106 int src_stride_y, 107 int src_stride_u, 108 int src_stride_v, 109 int src_width, 110 int src_height, 111 uint8* dst_y, 112 uint8* dst_u, 113 uint8* dst_v, 114 int dst_stride_y, 115 int dst_stride_u, 116 int dst_stride_v, 117 int dst_width, 118 int dst_height, 119 LIBYUV_BOOL interpolate); 120 121 // Legacy API. Deprecated. 122 LIBYUV_API 123 int ScaleOffset(const uint8* src_i420, 124 int src_width, 125 int src_height, 126 uint8* dst_i420, 127 int dst_width, 128 int dst_height, 129 int dst_yoffset, 130 LIBYUV_BOOL interpolate); 131 132 // For testing, allow disabling of specialized scalers. 133 LIBYUV_API 134 void SetUseReferenceImpl(LIBYUV_BOOL use); 135 #endif // __cplusplus 136 137 #ifdef __cplusplus 138 } // extern "C" 139 } // namespace libyuv 140 #endif 141 142 #endif // INCLUDE_LIBYUV_SCALE_H_ 143
