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Diffstat (limited to 'media/libvpx/libvpx/third_party/libyuv/include/libyuv/scale.h')
| -rw-r--r-- | media/libvpx/libvpx/third_party/libyuv/include/libyuv/scale.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/third_party/libyuv/include/libyuv/scale.h b/media/libvpx/libvpx/third_party/libyuv/include/libyuv/scale.h new file mode 100644 index 0000000000..b937d348ca --- /dev/null +++ b/media/libvpx/libvpx/third_party/libyuv/include/libyuv/scale.h @@ -0,0 +1,131 @@ +/* + * 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); + +// 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); + +#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_ |