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- /*
- * 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_
- #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_
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