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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_YUV_CONVERT_H_
#define MEDIA_BASE_YUV_CONVERT_H_
#include "base/basictypes.h"
namespace media {
// Type of YUV surface.
// The value of these enums matter as they are used to shift vertical indices.
enum YUVType {
YV16 = 0, // YV16 is half width and full height chroma channels.
YV12 = 1, // YV12 is half width and half height chroma channels.
};
// Mirror means flip the image horizontally, as in looking in a mirror.
// Rotate happens after mirroring.
enum Rotate {
ROTATE_0, // Rotation off.
ROTATE_90, // Rotate clockwise.
ROTATE_180, // Rotate upside down.
ROTATE_270, // Rotate counter clockwise.
MIRROR_ROTATE_0, // Mirror horizontally.
MIRROR_ROTATE_90, // Mirror then Rotate clockwise.
MIRROR_ROTATE_180, // Mirror vertically.
MIRROR_ROTATE_270, // Transpose.
};
// Filter affects how scaling looks.
enum ScaleFilter {
FILTER_NONE = 0, // No filter (point sampled).
FILTER_BILINEAR_H = 1, // Bilinear horizontal filter.
FILTER_BILINEAR_V = 2, // Bilinear vertical filter.
FILTER_BILINEAR = 3, // Bilinear filter.
};
// Convert a frame of YUV to 32 bit ARGB.
// Pass in YV16/YV12 depending on source format
void ConvertYUVToRGB32(const uint8* yplane,
const uint8* uplane,
const uint8* vplane,
uint8* rgbframe,
int width,
int height,
int ystride,
int uvstride,
int rgbstride,
YUVType yuv_type);
// Scale a frame of YUV to 32 bit ARGB.
// Supports rotation and mirroring.
void ScaleYUVToRGB32(const uint8* yplane,
const uint8* uplane,
const uint8* vplane,
uint8* rgbframe,
int source_width,
int source_height,
int width,
int height,
int ystride,
int uvstride,
int rgbstride,
YUVType yuv_type,
Rotate view_rotate,
ScaleFilter filter);
// Biliner Scale a frame of YV12 to 32 bits ARGB on a specified rectangle.
// |yplane|, etc and |rgbframe| should point to the top-left pixels of the
// source and destination buffers.
void ScaleYUVToRGB32WithRect(const uint8* yplane,
const uint8* uplane,
const uint8* vplane,
uint8* rgbframe,
int source_width,
int source_height,
int dest_width,
int dest_height,
int dest_rect_left,
int dest_rect_top,
int dest_rect_right,
int dest_rect_bottom,
int ystride,
int uvstride,
int rgbstride);
void ConvertRGB32ToYUV(const uint8* rgbframe,
uint8* yplane,
uint8* uplane,
uint8* vplane,
int width,
int height,
int rgbstride,
int ystride,
int uvstride);
void ConvertRGB24ToYUV(const uint8* rgbframe,
uint8* yplane,
uint8* uplane,
uint8* vplane,
int width,
int height,
int rgbstride,
int ystride,
int uvstride);
void ConvertYUY2ToYUV(const uint8* src,
uint8* yplane,
uint8* uplane,
uint8* vplane,
int width,
int height);
void ConvertNV21ToYUV(const uint8* src,
uint8* yplane,
uint8* uplane,
uint8* vplane,
int width,
int height);
// Empty SIMD register state after calling optimized scaler functions.
void EmptyRegisterState();
} // namespace media
#endif // MEDIA_BASE_YUV_CONVERT_H_
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