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diff --git a/media/libyuv/libyuv/include/libyuv/scale.h b/media/libyuv/libyuv/include/libyuv/scale.h
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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_t* src,
+ int src_stride,
+ int src_width,
+ int src_height,
+ uint8_t* dst,
+ int dst_stride,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+void ScalePlane_16(const uint16_t* src,
+ int src_stride,
+ int src_width,
+ int src_height,
+ uint16_t* dst,
+ int dst_stride,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+// Sample is expected to be in the low 12 bits.
+LIBYUV_API
+void ScalePlane_12(const uint16_t* src,
+ int src_stride,
+ int src_width,
+ int src_height,
+ uint16_t* 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_t* src_y,
+ int src_stride_y,
+ const uint8_t* src_u,
+ int src_stride_u,
+ const uint8_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint8_t* dst_y,
+ int dst_stride_y,
+ uint8_t* dst_u,
+ int dst_stride_u,
+ uint8_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I420Scale_16(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I420Scale_12(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+// Scales a YUV 4:4:4 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 I444Scale(const uint8_t* src_y,
+ int src_stride_y,
+ const uint8_t* src_u,
+ int src_stride_u,
+ const uint8_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint8_t* dst_y,
+ int dst_stride_y,
+ uint8_t* dst_u,
+ int dst_stride_u,
+ uint8_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I444Scale_16(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I444Scale_12(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+// Scales a YUV 4:2:2 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 I422Scale(const uint8_t* src_y,
+ int src_stride_y,
+ const uint8_t* src_u,
+ int src_stride_u,
+ const uint8_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint8_t* dst_y,
+ int dst_stride_y,
+ uint8_t* dst_u,
+ int dst_stride_u,
+ uint8_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I422Scale_16(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+LIBYUV_API
+int I422Scale_12(const uint16_t* src_y,
+ int src_stride_y,
+ const uint16_t* src_u,
+ int src_stride_u,
+ const uint16_t* src_v,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint16_t* dst_y,
+ int dst_stride_y,
+ uint16_t* dst_u,
+ int dst_stride_u,
+ uint16_t* dst_v,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+// Scales an NV12 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.
+// kFilterBox is not supported for the UV channel and will be treated as
+// bilinear.
+// Returns 0 if successful.
+
+LIBYUV_API
+int NV12Scale(const uint8_t* src_y,
+ int src_stride_y,
+ const uint8_t* src_uv,
+ int src_stride_uv,
+ int src_width,
+ int src_height,
+ uint8_t* dst_y,
+ int dst_stride_y,
+ uint8_t* dst_uv,
+ int dst_stride_uv,
+ int dst_width,
+ int dst_height,
+ enum FilterMode filtering);
+
+#ifdef __cplusplus
+// Legacy API. Deprecated.
+LIBYUV_API
+int Scale(const uint8_t* src_y,
+ const uint8_t* src_u,
+ const uint8_t* src_v,
+ int src_stride_y,
+ int src_stride_u,
+ int src_stride_v,
+ int src_width,
+ int src_height,
+ uint8_t* dst_y,
+ uint8_t* dst_u,
+ uint8_t* dst_v,
+ int dst_stride_y,
+ int dst_stride_u,
+ int dst_stride_v,
+ int dst_width,
+ int dst_height,
+ 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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