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267 lines
10 KiB
C++
267 lines
10 KiB
C++
/* Residual - A 3D game interpreter
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*
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* Residual is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the AUTHORS
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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// The YUV to RGB conversion code is derived from SDL's YUV overlay code, which
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// in turn appears to be derived from mpeg_play. The following copyright
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// notices have been included in accordance with the original license. Please
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// note that the term "software" in this context only applies to the
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// buildLookup() and plotYUV*() functions below.
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// Copyright (c) 1995 The Regents of the University of California.
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// All rights reserved.
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//
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// Permission to use, copy, modify, and distribute this software and its
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// documentation for any purpose, without fee, and without written agreement is
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// hereby granted, provided that the above copyright notice and the following
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// two paragraphs appear in all copies of this software.
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//
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// IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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// CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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// ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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// PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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// Copyright (c) 1995 Erik Corry
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// All rights reserved.
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//
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// Permission to use, copy, modify, and distribute this software and its
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// documentation for any purpose, without fee, and without written agreement is
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// hereby granted, provided that the above copyright notice and the following
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// two paragraphs appear in all copies of this software.
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//
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// IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
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// THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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// BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
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// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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// Portions of this software Copyright (c) 1995 Brown University.
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// All rights reserved.
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//
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// Permission to use, copy, modify, and distribute this software and its
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// documentation for any purpose, without fee, and without written agreement
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// is hereby granted, provided that the above copyright notice and the
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// following two paragraphs appear in all copies of this software.
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//
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// IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
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// DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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// OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
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// UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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// BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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// SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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#include "graphics/surface.h"
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#include "graphics/yuva_to_rgba.h"
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namespace Common {
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DECLARE_SINGLETON(Graphics::YUVAToRGBAManager);
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}
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namespace Graphics {
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class YUVAToRGBALookup {
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public:
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YUVAToRGBALookup(Graphics::PixelFormat format, YUVAToRGBAManager::LuminanceScale scale);
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Graphics::PixelFormat getFormat() const { return _format; }
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YUVAToRGBAManager::LuminanceScale getScale() const { return _scale; }
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const uint32 *getRGBToPix() const { return _rgbToPix; }
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const uint32 *getAlphaToPix() const { return _alphaToPix; }
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private:
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Graphics::PixelFormat _format;
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YUVAToRGBAManager::LuminanceScale _scale;
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uint32 _rgbToPix[3 * 768]; // 9216 bytes
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uint32 _alphaToPix[256]; // 958 bytes
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};
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YUVAToRGBALookup::YUVAToRGBALookup(Graphics::PixelFormat format, YUVAToRGBAManager::LuminanceScale scale) {
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_format = format;
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_scale = scale;
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uint32 *r_2_pix_alloc = &_rgbToPix[0 * 768];
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uint32 *g_2_pix_alloc = &_rgbToPix[1 * 768];
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uint32 *b_2_pix_alloc = &_rgbToPix[2 * 768];
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if (scale == YUVAToRGBAManager::kScaleFull) {
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// Set up entries 0-255 in rgb-to-pixel value tables.
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for (int i = 0; i < 256; i++) {
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r_2_pix_alloc[i + 256] = format.ARGBToColor(0, i, 0, 0);
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g_2_pix_alloc[i + 256] = format.ARGBToColor(0, 0, i, 0);
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b_2_pix_alloc[i + 256] = format.ARGBToColor(0, 0, 0, i);
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}
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// Spread out the values we have to the rest of the array so that we do
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// not need to check for overflow.
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for (int i = 0; i < 256; i++) {
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r_2_pix_alloc[i] = r_2_pix_alloc[256];
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r_2_pix_alloc[i + 512] = r_2_pix_alloc[511];
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g_2_pix_alloc[i] = g_2_pix_alloc[256];
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g_2_pix_alloc[i + 512] = g_2_pix_alloc[511];
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b_2_pix_alloc[i] = b_2_pix_alloc[256];
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b_2_pix_alloc[i + 512] = b_2_pix_alloc[511];
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}
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} else {
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// Set up entries 16-235 in rgb-to-pixel value tables
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for (int i = 16; i < 236; i++) {
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int scaledValue = (i - 16) * 255 / 219;
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r_2_pix_alloc[i + 256] = format.ARGBToColor(0, scaledValue, 0, 0);
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g_2_pix_alloc[i + 256] = format.ARGBToColor(0, 0, scaledValue, 0);
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b_2_pix_alloc[i + 256] = format.ARGBToColor(0, 0, 0, scaledValue);
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}
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// Spread out the values we have to the rest of the array so that we do
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// not need to check for overflow. We have to do it here in two steps.
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for (int i = 0; i < 256 + 16; i++) {
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r_2_pix_alloc[i] = r_2_pix_alloc[256 + 16];
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g_2_pix_alloc[i] = g_2_pix_alloc[256 + 16];
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b_2_pix_alloc[i] = b_2_pix_alloc[256 + 16];
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}
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for (int i = 256 + 236; i < 768; i++) {
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r_2_pix_alloc[i] = r_2_pix_alloc[256 + 236 - 1];
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g_2_pix_alloc[i] = g_2_pix_alloc[256 + 236 - 1];
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b_2_pix_alloc[i] = b_2_pix_alloc[256 + 236 - 1];
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}
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}
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// Set up entries 0-255 in alpha-to-pixel value table.
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for (int i = 0; i < 256; i++) {
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_alphaToPix[i] = format.ARGBToColor(i, 0, 0, 0);
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}
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}
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YUVAToRGBAManager::YUVAToRGBAManager() {
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_lookup = 0;
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int16 *Cr_r_tab = &_colorTab[0 * 256];
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int16 *Cr_g_tab = &_colorTab[1 * 256];
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int16 *Cb_g_tab = &_colorTab[2 * 256];
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int16 *Cb_b_tab = &_colorTab[3 * 256];
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// Generate the tables for the display surface
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for (int i = 0; i < 256; i++) {
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// Gamma correction (luminescence table) and chroma correction
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// would be done here. See the Berkeley mpeg_play sources.
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int16 CR = (i - 128), CB = CR;
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Cr_r_tab[i] = (int16) ( (0.419 / 0.299) * CR) + 0 * 768 + 256;
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Cr_g_tab[i] = (int16) (-(0.299 / 0.419) * CR) + 1 * 768 + 256;
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Cb_g_tab[i] = (int16) (-(0.114 / 0.331) * CB);
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Cb_b_tab[i] = (int16) ( (0.587 / 0.331) * CB) + 2 * 768 + 256;
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}
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}
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YUVAToRGBAManager::~YUVAToRGBAManager() {
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delete _lookup;
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}
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const YUVAToRGBALookup *YUVAToRGBAManager::getLookup(Graphics::PixelFormat format, YUVAToRGBAManager::LuminanceScale scale) {
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if (_lookup && _lookup->getFormat() == format && _lookup->getScale() == scale)
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return _lookup;
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delete _lookup;
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_lookup = new YUVAToRGBALookup(format, scale);
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return _lookup;
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}
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#define PUT_PIXELA(s, a, d) \
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L = &rgbToPix[(s)]; \
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*((PixelInt *)(d)) = (L[cr_r] | L[crb_g] | L[cb_b] | aToPix[a])
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template<typename PixelInt>
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void convertYUVA420ToRGBA(byte *dstPtr, int dstPitch, const YUVAToRGBALookup *lookup, int16 *colorTab, const byte *ySrc, const byte *uSrc, const byte *vSrc, const byte *aSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
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int halfHeight = yHeight >> 1;
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int halfWidth = yWidth >> 1;
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// Keep the tables in pointers here to avoid a dereference on each pixel
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const int16 *Cr_r_tab = colorTab;
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const int16 *Cr_g_tab = Cr_r_tab + 256;
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const int16 *Cb_g_tab = Cr_g_tab + 256;
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const int16 *Cb_b_tab = Cb_g_tab + 256;
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const uint32 *rgbToPix = lookup->getRGBToPix();
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const uint32 *aToPix = lookup->getAlphaToPix();
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for (int h = 0; h < halfHeight; h++) {
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for (int w = 0; w < halfWidth; w++) {
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register const uint32 *L;
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int16 cr_r = Cr_r_tab[*vSrc];
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int16 crb_g = Cr_g_tab[*vSrc] + Cb_g_tab[*uSrc];
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int16 cb_b = Cb_b_tab[*uSrc];
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++uSrc;
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++vSrc;
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PUT_PIXELA(*ySrc, *aSrc, dstPtr);
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PUT_PIXELA(*(ySrc + yPitch), *(aSrc + yPitch), dstPtr + dstPitch);
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ySrc++;
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aSrc++;
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dstPtr += sizeof(PixelInt);
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PUT_PIXELA(*ySrc, *aSrc, dstPtr);
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PUT_PIXELA(*(ySrc + yPitch), *(aSrc + yPitch), dstPtr + dstPitch);
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ySrc++;
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aSrc++;
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dstPtr += sizeof(PixelInt);
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}
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dstPtr += dstPitch;
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ySrc += (yPitch << 1) - yWidth;
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aSrc += (yPitch << 1) - yWidth;
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uSrc += uvPitch - halfWidth;
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vSrc += uvPitch - halfWidth;
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}
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}
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void YUVAToRGBAManager::convert420(Graphics::Surface *dst, YUVAToRGBAManager::LuminanceScale scale, const byte *ySrc, const byte *uSrc, const byte *vSrc, const byte *aSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
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// Sanity checks
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assert(dst && dst->getPixels());
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assert(dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4);
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assert(ySrc && uSrc && vSrc);
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assert((yWidth & 1) == 0);
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assert((yHeight & 1) == 0);
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const YUVAToRGBALookup *lookup = getLookup(dst->format, scale);
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// Use a templated function to avoid an if check on every pixel
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if (dst->format.bytesPerPixel == 2)
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convertYUVA420ToRGBA<uint16>((byte *)dst->getPixels(), dst->pitch, lookup, _colorTab, ySrc, uSrc, vSrc, aSrc, yWidth, yHeight, yPitch, uvPitch);
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else
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convertYUVA420ToRGBA<uint32>((byte *)dst->getPixels(), dst->pitch, lookup, _colorTab, ySrc, uSrc, vSrc, aSrc, yWidth, yHeight, yPitch, uvPitch);
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}
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} // End of namespace Graphics
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