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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// The YUV to RGB conversion code is derived from SDL's YUV overlay code, which
// in turn appears to be derived from mpeg_play. The following copyright
// notices have been included in accordance with the original license. Please
// note that the term "software" in this context only applies to the
// buildLookup() and plotYUV*() functions below.
// Copyright (c) 1995 The Regents of the University of California.
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement is
// hereby granted, provided that the above copyright notice and the following
// two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
// CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
// PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
// Copyright (c) 1995 Erik Corry
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement is
// hereby granted, provided that the above copyright notice and the following
// two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
// THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
// BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
// Portions of this software Copyright (c) 1995 Brown University.
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without written agreement
// is hereby granted, provided that the above copyright notice and the
// following two paragraphs appear in all copies of this software.
//
// IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
// UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
// BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#include "common/scummsys.h"
#include "common/singleton.h"
#include "graphics/surface.h"
namespace Graphics {
class YUVToRGBLookup {
public:
YUVToRGBLookup(Graphics::PixelFormat format);
~YUVToRGBLookup();
int16 *_colorTab;
uint32 *_rgbToPix;
};
YUVToRGBLookup::YUVToRGBLookup(Graphics::PixelFormat format) {
_colorTab = new int16[4 * 256]; // 2048 bytes
int16 *Cr_r_tab = &_colorTab[0 * 256];
int16 *Cr_g_tab = &_colorTab[1 * 256];
int16 *Cb_g_tab = &_colorTab[2 * 256];
int16 *Cb_b_tab = &_colorTab[3 * 256];
_rgbToPix = new uint32[3 * 768]; // 9216 bytes
uint32 *r_2_pix_alloc = &_rgbToPix[0 * 768];
uint32 *g_2_pix_alloc = &_rgbToPix[1 * 768];
uint32 *b_2_pix_alloc = &_rgbToPix[2 * 768];
int16 CR, CB;
int i;
// Generate the tables for the display surface
for (i = 0; i < 256; i++) {
// Gamma correction (luminescence table) and chroma correction
// would be done here. See the Berkeley mpeg_play sources.
CR = CB = (i - 128);
Cr_r_tab[i] = (int16) ( (0.419 / 0.299) * CR) + 0 * 768 + 256;
Cr_g_tab[i] = (int16) (-(0.299 / 0.419) * CR) + 1 * 768 + 256;
Cb_g_tab[i] = (int16) (-(0.114 / 0.331) * CB);
Cb_b_tab[i] = (int16) ( (0.587 / 0.331) * CB) + 2 * 768 + 256;
}
// Set up entries 0-255 in rgb-to-pixel value tables.
for (i = 0; i < 256; i++) {
r_2_pix_alloc[i + 256] = format.RGBToColor(i, 0, 0);
g_2_pix_alloc[i + 256] = format.RGBToColor(0, i, 0);
b_2_pix_alloc[i + 256] = format.RGBToColor(0, 0, i);
}
// Spread out the values we have to the rest of the array so that we do
// not need to check for overflow.
for (i = 0; i < 256; i++) {
r_2_pix_alloc[i] = r_2_pix_alloc[256];
r_2_pix_alloc[i + 512] = r_2_pix_alloc[511];
g_2_pix_alloc[i] = g_2_pix_alloc[256];
g_2_pix_alloc[i + 512] = g_2_pix_alloc[511];
b_2_pix_alloc[i] = b_2_pix_alloc[256];
b_2_pix_alloc[i + 512] = b_2_pix_alloc[511];
}
}
YUVToRGBLookup::~YUVToRGBLookup() {
delete[] _rgbToPix;
delete[] _colorTab;
}
class YUVToRGBManager : public Common::Singleton<YUVToRGBManager> {
public:
const YUVToRGBLookup *getLookup(Graphics::PixelFormat format);
private:
friend class Common::Singleton<SingletonBaseType>;
YUVToRGBManager();
~YUVToRGBManager();
Graphics::PixelFormat _lastFormat;
YUVToRGBLookup *_lookup;
};
YUVToRGBManager::YUVToRGBManager() {
_lookup = 0;
}
YUVToRGBManager::~YUVToRGBManager() {
delete _lookup;
}
const YUVToRGBLookup *YUVToRGBManager::getLookup(Graphics::PixelFormat format) {
if (_lastFormat == format)
return _lookup;
delete _lookup;
_lookup = new YUVToRGBLookup(format);
_lastFormat = format;
return _lookup;
}
} // End of namespace Graphics
DECLARE_SINGLETON(Graphics::YUVToRGBManager);
#define YUVToRGBMan (Graphics::YUVToRGBManager::instance())
namespace Graphics {
#define PUT_PIXEL(s, d) \
L = &lookup->_rgbToPix[(s)]; \
if (dst->format.bytesPerPixel == 2) \
*((uint16 *)(d)) = (L[cr_r] | L[crb_g] | L[cb_b]); \
else \
*((uint32 *)(d)) = (L[cr_r] | L[crb_g] | L[cb_b])
void convertYUV420ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
// Sanity checks
assert(dst && dst->pixels);
assert(dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4);
assert(ySrc && uSrc && vSrc);
assert((yWidth & 1) == 0);
assert((yHeight & 1) == 0);
const YUVToRGBLookup *lookup = YUVToRGBMan.getLookup(dst->format);
byte *dstPtr = (byte *)dst->pixels;
int halfHeight = yHeight >> 1;
int halfWidth = yWidth >> 1;
for (int h = 0; h < halfHeight; h++) {
for (int w = 0; w < halfWidth; w++) {
register uint32 *L;
int16 cr_r = lookup->_colorTab[*vSrc + 0 * 256];
int16 crb_g = lookup->_colorTab[*vSrc + 1 * 256] + lookup->_colorTab[*uSrc + 2 * 256];
int16 cb_b = lookup->_colorTab[*uSrc + 3 * 256];
++uSrc;
++vSrc;
PUT_PIXEL(*ySrc, dstPtr);
PUT_PIXEL(*(ySrc + yPitch), dstPtr + dst->pitch);
ySrc++;
dstPtr += dst->format.bytesPerPixel;
PUT_PIXEL(*ySrc, dstPtr);
PUT_PIXEL(*(ySrc + yPitch), dstPtr + dst->pitch);
ySrc++;
dstPtr += dst->format.bytesPerPixel;
}
dstPtr += dst->pitch;
ySrc += (yPitch << 1) - yWidth;
uSrc += uvPitch - halfWidth;
vSrc += uvPitch - halfWidth;
}
}
} // End of namespace Graphics
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