ConverterYV12.h
Go to the documentation of this file.00001 /* ======================================================================== 00002 * Copyright (C) 2004-2006 Graz University of Technology 00003 * 00004 * This framework is free software; you can redistribute it and/or modify 00005 * it under the terms of the GNU General Public License as published by 00006 * the Free Software Foundation; either version 2 of the License, or 00007 * (at your option) any later version. 00008 * 00009 * This framework is distributed in the hope that it will be useful, 00010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 * GNU General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU General Public License 00015 * along with this framework; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 * 00018 * For further information please contact Dieter Schmalstieg under 00019 * <schmalstieg@icg.tu-graz.ac.at> or write to Dieter Schmalstieg, 00020 * Graz University of Technology, Institut für Maschinelles Sehen und Darstellen, 00021 * Inffeldgasse 16a, 8010 Graz, Austria. 00022 * ======================================================================== 00023 * PROJECT: OpenVideo 00024 * ======================================================================== */ 00029 /* ======================================================================= */ 00030 00031 // 00032 // Optimized Converter from YV12 to RGB565 and Luminance 00033 // Written from scratch by Daniel Wagner 00034 // For questions send a mail to: daniel@icg.tu-graz.ac.at 00035 // 00036 // Modified by Bernhard Reitinger in order to convert YV12 to RGBA 00037 // 00038 // Highly optimized C++ version. Uses look-up 00039 // tables for almost everything; thereby requires 00040 // no multiplication or if operations for doing 00041 // format conversion including saturation checks. 00042 // 00043 // Memory usage: allocates 3249 bytes for lookup tables. 00044 // 00045 // Should run pretty fast on any device. Intel IPP 00046 // probably includes a much faster version using WirelessMXX 00047 // (would only work on Intel XScale processors). 00048 // 00049 // 00050 00051 #ifndef _CONVERTERYV12_H_ 00052 #define _CONVERTERYV12_H_ 00053 00054 namespace openvideo { 00055 00056 class ConverterYV12 00057 { 00058 public: 00059 00060 enum FORMAT { 00061 FORMAT_INVALID = 0, 00062 FORMAT_RGB565 = 1, 00063 FORMAT_RGB555 = 2, 00064 FORMAT_RGB24 = 3, 00065 FORMAT_RGB32 = 4, 00066 FORMAT_YV12 = 5 00067 }; 00068 00069 enum { 00070 LUTCAP_MIN = -153, 00071 LUTCAP_MAX = 535, 00072 CHANNEL_RANGE = 256 00073 }; 00074 00075 ConverterYV12() { init(); } 00076 00077 ~ConverterYV12() { deinit(); } 00078 00079 void convertToRGB32(const unsigned char* nSrcYUV, int nWidth, int nHeight, unsigned int* nDstRGB32, bool nSwizzle34, int nCropX=0, int nCropY=0); 00080 00081 void convertToLum(const unsigned char* nSrcYUV, int nWidth, int nHeight, unsigned char* nDstLum, bool nSwizzle34, int nCropX=0, int nCropY=0); 00082 00083 protected: 00084 void init(); 00085 void deinit(); 00086 00087 int cap(int nV) { /*assert(nV>=LUTCAP_MIN && nV<=LUTCAP_MAX);*/ return lutCap[nV]; } 00088 00089 int getV_for_Red(int nV) { /*assert(nV>=0 && nV<CHANNEL_RANGE);*/ return lutV_for_Red[nV]; } 00090 int getU_for_Blue(int nU) { /*assert(nU>=0 && nU<CHANNEL_RANGE);*/ return lutU_for_Blue[nU]; } 00091 int getV_for_Green(int nV) { /*assert(nV>=0 && nV<CHANNEL_RANGE);*/ return lutV_for_Green[nV]; } 00092 int getU_for_Green(int nU) { /*assert(nU>=0 && nU<CHANNEL_RANGE);*/ return lutU_for_Green[nU]; } 00093 int getY(int nY) { /*assert(nY>=0 && nY<CHANNEL_RANGE);*/ return lutY[nY]; } 00094 00095 unsigned char *lutCap0, 00096 *lutCap; 00097 00098 short *lutV_for_Red, 00099 *lutU_for_Blue, 00100 *lutV_for_Green, 00101 *lutU_for_Green, 00102 *lutY; 00103 }; 00104 00105 00106 } // namespace openvideo 00107 00108 #endif // _CONVERTERYV12_H_ 00109 00110 //======================================================================== 00111 // End of $FILENAME$ 00112 //======================================================================== 00113 // Local Variables: 00114 // mode: c++ 00115 // c-basic-offset: 4 00116 // eval: (c-set-offset 'substatement-open 0) 00117 // eval: (c-set-offset 'case-label '+) 00118 // eval: (c-set-offset 'statement 'c-lineup-runin-statements) 00119 // eval: (setq indent-tabs-mode nil) 00120 // End: 00121 //========================================================================