mirror of
https://github.com/dolphin-emu/dolphin.git
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bbbe898839
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@879 8ced0084-cf51-0410-be5f-012b33b47a6e
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "XFBConvert.h"
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#include "Common.h"
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// TODO: Convert this thing into wicked fast SSE2.
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namespace {
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int bound(int i)
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{
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return (i>255)?255:((i<0)?0:i);
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}
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void yuv2rgb(int y, int u, int v, int &r, int &g, int &b)
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{
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b = bound((76283*(y - 16) + 132252*(u - 128))>>16);
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g = bound((76283*(y - 16) - 53281 *(v - 128) - 25624*(u - 128))>>16); //last one u?
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r = bound((76283*(y - 16) + 104595*(v - 128))>>16);
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}
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void rgb2yuv(int r, int g, int b, int &y, int &u, int &v)
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{
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y = (((16843 * r) + (33030 * g) + (6423 * b)) >> 16) + 16;
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v = (((28770 * r) - (24117 * g) - (4653 * b)) >> 16) + 128;
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u = ((-(9699 * r) - (19071 * g) + (28770 * b)) >> 16) + 128;
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}
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} // namespace
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void ConvertFromXFB(u32 *dst, const u8* _pXFB, int width, int height)
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{
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const unsigned char *src = _pXFB;
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u32 numBlocks = (width * height) / 2;
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for (u32 i = 0; i < numBlocks; i++, src += 4)
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{
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int Y1 = src[0];
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int U = src[1];
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int Y2 = src[2];
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int V = src[3];
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int r, g, b;
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yuv2rgb(Y1,U,V, r,g,b);
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*dst++ = 0xFF000000 | (r<<16) | (g<<8) | (b);
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yuv2rgb(Y2,U,V, r,g,b);
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*dst++ = 0xFF000000 | (r<<16) | (g<<8) | (b);
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}
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}
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void ConvertToXFB(u32 *dst, const u8* _pEFB, int width, int height)
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{
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const unsigned char *src = _pEFB;
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u32 numBlocks = (width * height) / 2;
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for (u32 i = 0; i < numBlocks; i++)
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{
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int y1 = (((16843 * src[0]) + (33030 * src[1]) + (6423 * src[2])) >> 16) + 16;
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int u1 = ((-(9699 * src[0]) - (19071 * src[1]) + (28770 * src[2])) >> 16) + 128;
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src += 4;
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int y2 = (((16843 * src[0]) + (33030 * src[1]) + (6423 * src[2])) >> 16) + 16;
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int v2 = (((28770 * src[0]) - (24117 * src[1]) - (4653 * src[2])) >> 16) + 128;
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src += 4;
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*dst++ = (v2 << 24) | (y2 << 16) | (u1 << 8) | (y1);
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}
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}
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