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https://chromium.googlesource.com/libyuv/libyuv
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fe5ff7ed54
BUG=none TEST=none Review URL: http://webrtc-codereview.appspot.com/320004 git-svn-id: http://libyuv.googlecode.com/svn/trunk@101 16f28f9a-4ce2-e073-06de-1de4eb20be90
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (c) 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_
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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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enum FilterMode {
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kFilterNone = 0, // Point sample; Fastest
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kFilterBilinear = 1, // Faster than box, but lower quality scaling down.
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kFilterBox = 2 // Highest quality
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};
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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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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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FilterMode filtering);
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// Legacy API. Deprecated
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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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bool interpolate);
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// Legacy API. Deprecated
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int ScaleOffset(const uint8* src, int src_width, int src_height,
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uint8* dst, int dst_width, int dst_height, int dst_yoffset,
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bool interpolate);
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// For testing, allow disabling of optimizations.
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void SetUseReferenceImpl(bool use);
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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_
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