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