| /* |
| * Copyright 2011 The LibYuv Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef INCLUDE_LIBYUV_SCALE_H_ // NOLINT |
| #define INCLUDE_LIBYUV_SCALE_H_ |
| |
| #include "libyuv/basic_types.h" |
| |
| #ifdef __cplusplus |
| namespace libyuv { |
| extern "C" { |
| #endif |
| |
| // Supported filtering. |
| typedef enum FilterMode { |
| kFilterNone = 0, // Point sample; Fastest. |
| kFilterLinear = 1, // Filter horizontally only. |
| kFilterBilinear = 2, // Faster than box, but lower quality scaling down. |
| kFilterBox = 3 // Highest quality. |
| } FilterModeEnum; |
| |
| // Scale a YUV plane. |
| LIBYUV_API |
| void ScalePlane(const uint8* src, int src_stride, |
| int src_width, int src_height, |
| uint8* dst, int dst_stride, |
| int dst_width, int dst_height, |
| enum FilterMode filtering); |
| |
| LIBYUV_API |
| void ScalePlane_16(const uint16* src, int src_stride, |
| int src_width, int src_height, |
| uint16* dst, int dst_stride, |
| int dst_width, int dst_height, |
| enum FilterMode filtering); |
| |
| // Scales a YUV 4:2:0 image from the src width and height to the |
| // dst width and height. |
| // If filtering is kFilterNone, a simple nearest-neighbor algorithm is |
| // used. This produces basic (blocky) quality at the fastest speed. |
| // If filtering is kFilterBilinear, interpolation is used to produce a better |
| // quality image, at the expense of speed. |
| // If filtering is kFilterBox, averaging is used to produce ever better |
| // quality image, at further expense of speed. |
| // Returns 0 if successful. |
| |
| LIBYUV_API |
| int I420Scale(const uint8* src_y, int src_stride_y, |
| const uint8* src_u, int src_stride_u, |
| const uint8* src_v, int src_stride_v, |
| int src_width, int src_height, |
| uint8* dst_y, int dst_stride_y, |
| uint8* dst_u, int dst_stride_u, |
| uint8* dst_v, int dst_stride_v, |
| int dst_width, int dst_height, |
| enum FilterMode filtering); |
| |
| LIBYUV_API |
| int I420Scale_16(const uint16* src_y, int src_stride_y, |
| const uint16* src_u, int src_stride_u, |
| const uint16* src_v, int src_stride_v, |
| int src_width, int src_height, |
| uint16* dst_y, int dst_stride_y, |
| uint16* dst_u, int dst_stride_u, |
| uint16* dst_v, int dst_stride_v, |
| int dst_width, int dst_height, |
| enum FilterMode filtering); |
| |
| #ifdef __cplusplus |
| // Legacy API. Deprecated. |
| LIBYUV_API |
| int Scale(const uint8* src_y, const uint8* src_u, const uint8* src_v, |
| int src_stride_y, int src_stride_u, int src_stride_v, |
| int src_width, int src_height, |
| uint8* dst_y, uint8* dst_u, uint8* dst_v, |
| int dst_stride_y, int dst_stride_u, int dst_stride_v, |
| int dst_width, int dst_height, |
| LIBYUV_BOOL interpolate); |
| |
| // Legacy API. Deprecated. |
| LIBYUV_API |
| int ScaleOffset(const uint8* src_i420, int src_width, int src_height, |
| uint8* dst_i420, int dst_width, int dst_height, int dst_yoffset, |
| LIBYUV_BOOL interpolate); |
| |
| // For testing, allow disabling of specialized scalers. |
| LIBYUV_API |
| void SetUseReferenceImpl(LIBYUV_BOOL use); |
| #endif // __cplusplus |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| } // namespace libyuv |
| #endif |
| |
| #endif // INCLUDE_LIBYUV_SCALE_H_ NOLINT |
