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/**************************************************************************
*
* Copyright 2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
**************************************************************************/
/**
* @file
* YUV colorspace conversion.
*
* @author Brian Paul <brianp@vmware.com>
* @author Michal Krol <michal@vmware.com>
* @author Jose Fonseca <jfonseca@vmware.com>
*
* See also:
* - http://www.fourcc.org/fccyvrgb.php
* - http://msdn.microsoft.com/en-us/library/ms893078
* - http://en.wikipedia.org/wiki/YUV
*/
#ifndef U_FORMAT_YUV_H_
#define U_FORMAT_YUV_H_
#include "pipe/p_compiler.h"
#include "u_math.h"
/*
* TODO: Ensure we use consistent and right floating formulas, with enough
* precision in the coefficients.
*/
static INLINE void
util_format_rgb_float_to_yuv(float r, float g, float b,
uint8_t *y, uint8_t *u, uint8_t *v)
{
const float _r = CLAMP(r, 0.0f, 1.0f);
const float _g = CLAMP(g, 0.0f, 1.0f);
const float _b = CLAMP(b, 0.0f, 1.0f);
const float scale = 255.0f;
const int _y = scale * ( (0.257f * _r) + (0.504f * _g) + (0.098f * _b));
const int _u = scale * (-(0.148f * _r) - (0.291f * _g) + (0.439f * _b));
const int _v = scale * ( (0.439f * _r) - (0.368f * _g) - (0.071f * _b));
*y = _y + 16;
*u = _u + 128;
*v = _v + 128;
}
static INLINE void
util_format_yuv_to_rgb_float(uint8_t y, uint8_t u, uint8_t v,
float *r, float *g, float *b)
{
const int _y = y - 16;
const int _u = u - 128;
const int _v = v - 128;
const float y_factor = 255.0f / 219.0f;
const float scale = 1.0f / 255.0f;
*r = scale * (y_factor * _y + 1.596f * _v);
*g = scale * (y_factor * _y - 0.391f * _u - 0.813f * _v);
*b = scale * (y_factor * _y + 2.018f * _u );
}
static INLINE void
util_format_rgb_8unorm_to_yuv(uint8_t r, uint8_t g, uint8_t b,
uint8_t *y, uint8_t *u, uint8_t *v)
{
*y = (( 66 * r + 129 * g + 25 * b + 128) >> 8) + 16;
*u = (( -38 * r - 74 * g + 112 * b + 128) >> 8) + 128;
*v = (( 112 * r - 94 * g - 18 * b + 128) >> 8) + 128;
}
static INLINE void
util_format_yuv_to_rgb_8unorm(uint8_t y, uint8_t u, uint8_t v,
uint8_t *r, uint8_t *g, uint8_t *b)
{
const int _y = y - 16;
const int _u = u - 128;
const int _v = v - 128;
const int _r = (298 * _y + 409 * _v + 128) >> 8;
const int _g = (298 * _y - 100 * _u - 208 * _v + 128) >> 8;
const int _b = (298 * _y + 516 * _u + 128) >> 8;
*r = CLAMP(_r, 0, 255);
*g = CLAMP(_g, 0, 255);
*b = CLAMP(_b, 0, 255);
}
void
util_format_uyvy_unpack_float(float *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_uyvy_unpack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_uyvy_pack_float(uint8_t *dst_row, unsigned dst_stride,
const float *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_uyvy_pack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_uyvy_fetch_float(float *dst, const uint8_t *src,
unsigned i, unsigned j);
void
util_format_yuyv_unpack_float(float *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_yuyv_unpack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_yuyv_pack_float(uint8_t *dst_row, unsigned dst_stride,
const float *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_yuyv_pack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_yuyv_fetch_float(float *dst, const uint8_t *src,
unsigned i, unsigned j);
void
util_format_r8g8_b8g8_unorm_unpack_float(float *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_r8g8_b8g8_unorm_unpack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_r8g8_b8g8_unorm_pack_float(uint8_t *dst_row, unsigned dst_stride,
const float *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_r8g8_b8g8_unorm_pack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_r8g8_b8g8_unorm_fetch_float(float *dst, const uint8_t *src,
unsigned i, unsigned j);
void
util_format_g8r8_g8b8_unorm_unpack_float(float *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_g8r8_g8b8_unorm_unpack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_g8r8_g8b8_unorm_pack_float(uint8_t *dst_row, unsigned dst_stride,
const float *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_g8r8_g8b8_unorm_pack_8unorm(uint8_t *dst_row, unsigned dst_stride,
const uint8_t *src_row, unsigned src_stride,
unsigned width, unsigned height);
void
util_format_g8r8_g8b8_unorm_fetch_float(float *dst, const uint8_t *src,
unsigned i, unsigned j);
#endif /* U_FORMAT_YUV_H_ */
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