MythTV: rgb2rgb.c Source File

00001 /*
00002  *  rgb2rgb.c, Software RGB to RGB convertor
00003  *  pluralize by Software PAL8 to RGB convertor
00004  *               Software YUV to YUV convertor
00005  *               Software YUV to RGB convertor
00006  *  Written by Nick Kurshev.
00007  *  palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
00008  *
00009  * This file is part of FFmpeg.
00010  *
00011  * FFmpeg is free software; you can redistribute it and/or modify
00012  * it under the terms of the GNU General Public License as published by
00013  * the Free Software Foundation; either version 2 of the License, or
00014  * (at your option) any later version.
00015  *
00016  * FFmpeg is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  * GNU General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU General Public License
00022  * along with FFmpeg; if not, write to the Free Software
00023  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00024  *
00025  * the C code (not assembly, mmx, ...) of this file can be used
00026  * under the LGPL license too
00027  */
00028 #include <inttypes.h>
00029 #include "config.h"
00030 #include "rgb2rgb.h"
00031 #include "swscale.h"
00032 #include "swscale_internal.h"
00033 #include "x86_cpu.h"
00034 #include "bswap.h"
00035 
00036 #define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
00037 
00038 void (*rgb24to32)(const uint8_t *src,uint8_t *dst,long src_size);
00039 void (*rgb24to16)(const uint8_t *src,uint8_t *dst,long src_size);
00040 void (*rgb24to15)(const uint8_t *src,uint8_t *dst,long src_size);
00041 void (*rgb32to24)(const uint8_t *src,uint8_t *dst,long src_size);
00042 void (*rgb32to16)(const uint8_t *src,uint8_t *dst,long src_size);
00043 void (*rgb32to15)(const uint8_t *src,uint8_t *dst,long src_size);
00044 void (*rgb15to16)(const uint8_t *src,uint8_t *dst,long src_size);
00045 void (*rgb15to24)(const uint8_t *src,uint8_t *dst,long src_size);
00046 void (*rgb15to32)(const uint8_t *src,uint8_t *dst,long src_size);
00047 void (*rgb16to15)(const uint8_t *src,uint8_t *dst,long src_size);
00048 void (*rgb16to24)(const uint8_t *src,uint8_t *dst,long src_size);
00049 void (*rgb16to32)(const uint8_t *src,uint8_t *dst,long src_size);
00050 //void (*rgb24tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
00051 void (*rgb24tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
00052 void (*rgb24tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
00053 void (*rgb24tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
00054 void (*rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
00055 //void (*rgb32tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
00056 void (*rgb32tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
00057 void (*rgb32tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
00058 
00059 void (*yv12toyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00060                    long width, long height,
00061                    long lumStride, long chromStride, long dstStride);
00062 void (*yv12touyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00063                    long width, long height,
00064                    long lumStride, long chromStride, long dstStride);
00065 void (*yuv422ptoyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
00066                       long width, long height,
00067                       long lumStride, long chromStride, long dstStride);
00068 void (*yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
00069                    long width, long height,
00070                    long lumStride, long chromStride, long srcStride);
00071 void (*rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
00072                     long width, long height,
00073                     long lumStride, long chromStride, long srcStride);
00074 void (*planar2x)(const uint8_t *src, uint8_t *dst, long width, long height,
00075                  long srcStride, long dstStride);
00076 void (*interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dst,
00077                         long width, long height, long src1Stride,
00078                         long src2Stride, long dstStride);
00079 void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
00080                     uint8_t *dst1, uint8_t *dst2,
00081                     long width, long height,
00082                     long srcStride1, long srcStride2,
00083                     long dstStride1, long dstStride2);
00084 void (*yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
00085                      uint8_t *dst,
00086                      long width, long height,
00087                      long srcStride1, long srcStride2,
00088                      long srcStride3, long dstStride);
00089 
00090 #if defined(ARCH_X86) && defined(CONFIG_GPL)
00091 static const uint64_t mmx_null     __attribute__((aligned(8))) = 0x0000000000000000ULL;
00092 static const uint64_t mmx_one      __attribute__((aligned(8))) = 0xFFFFFFFFFFFFFFFFULL;
00093 static const uint64_t mask32b      attribute_used __attribute__((aligned(8))) = 0x000000FF000000FFULL;
00094 static const uint64_t mask32g      attribute_used __attribute__((aligned(8))) = 0x0000FF000000FF00ULL;
00095 static const uint64_t mask32r      attribute_used __attribute__((aligned(8))) = 0x00FF000000FF0000ULL;
00096 static const uint64_t mask32       __attribute__((aligned(8))) = 0x00FFFFFF00FFFFFFULL;
00097 static const uint64_t mask3216br   __attribute__((aligned(8))) = 0x00F800F800F800F8ULL;
00098 static const uint64_t mask3216g    __attribute__((aligned(8))) = 0x0000FC000000FC00ULL;
00099 static const uint64_t mask3215g    __attribute__((aligned(8))) = 0x0000F8000000F800ULL;
00100 static const uint64_t mul3216      __attribute__((aligned(8))) = 0x2000000420000004ULL;
00101 static const uint64_t mul3215      __attribute__((aligned(8))) = 0x2000000820000008ULL;
00102 static const uint64_t mask24b      attribute_used __attribute__((aligned(8))) = 0x00FF0000FF0000FFULL;
00103 static const uint64_t mask24g      attribute_used __attribute__((aligned(8))) = 0xFF0000FF0000FF00ULL;
00104 static const uint64_t mask24r      attribute_used __attribute__((aligned(8))) = 0x0000FF0000FF0000ULL;
00105 static const uint64_t mask24l      __attribute__((aligned(8))) = 0x0000000000FFFFFFULL;
00106 static const uint64_t mask24h      __attribute__((aligned(8))) = 0x0000FFFFFF000000ULL;
00107 static const uint64_t mask24hh     __attribute__((aligned(8))) = 0xffff000000000000ULL;
00108 static const uint64_t mask24hhh    __attribute__((aligned(8))) = 0xffffffff00000000ULL;
00109 static const uint64_t mask24hhhh   __attribute__((aligned(8))) = 0xffffffffffff0000ULL;
00110 static const uint64_t mask15b      __attribute__((aligned(8))) = 0x001F001F001F001FULL; /* 00000000 00011111  xxB */
00111 static const uint64_t mask15rg     __attribute__((aligned(8))) = 0x7FE07FE07FE07FE0ULL; /* 01111111 11100000  RGx */
00112 static const uint64_t mask15s      __attribute__((aligned(8))) = 0xFFE0FFE0FFE0FFE0ULL;
00113 static const uint64_t mask15g      __attribute__((aligned(8))) = 0x03E003E003E003E0ULL;
00114 static const uint64_t mask15r      __attribute__((aligned(8))) = 0x7C007C007C007C00ULL;
00115 #define mask16b mask15b
00116 static const uint64_t mask16g      __attribute__((aligned(8))) = 0x07E007E007E007E0ULL;
00117 static const uint64_t mask16r      __attribute__((aligned(8))) = 0xF800F800F800F800ULL;
00118 static const uint64_t red_16mask   __attribute__((aligned(8))) = 0x0000f8000000f800ULL;
00119 static const uint64_t green_16mask __attribute__((aligned(8))) = 0x000007e0000007e0ULL;
00120 static const uint64_t blue_16mask  __attribute__((aligned(8))) = 0x0000001f0000001fULL;
00121 static const uint64_t red_15mask   __attribute__((aligned(8))) = 0x00007c0000007c00ULL;
00122 static const uint64_t green_15mask __attribute__((aligned(8))) = 0x000003e0000003e0ULL;
00123 static const uint64_t blue_15mask  __attribute__((aligned(8))) = 0x0000001f0000001fULL;
00124 
00125 #ifdef FAST_BGR2YV12
00126 static const uint64_t bgr2YCoeff   attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
00127 static const uint64_t bgr2UCoeff   attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
00128 static const uint64_t bgr2VCoeff   attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
00129 #else
00130 static const uint64_t bgr2YCoeff   attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
00131 static const uint64_t bgr2UCoeff   attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
00132 static const uint64_t bgr2VCoeff   attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
00133 #endif
00134 static const uint64_t bgr2YOffset  attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
00135 static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8))) = 0x8080808080808080ULL;
00136 static const uint64_t w1111        attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
00137 
00138 #if 0
00139 static volatile uint64_t __attribute__((aligned(8))) b5Dither;
00140 static volatile uint64_t __attribute__((aligned(8))) g5Dither;
00141 static volatile uint64_t __attribute__((aligned(8))) g6Dither;
00142 static volatile uint64_t __attribute__((aligned(8))) r5Dither;
00143 
00144 static uint64_t __attribute__((aligned(8))) dither4[2]={
00145     0x0103010301030103LL,
00146     0x0200020002000200LL,};
00147 
00148 static uint64_t __attribute__((aligned(8))) dither8[2]={
00149     0x0602060206020602LL,
00150     0x0004000400040004LL,};
00151 #endif
00152 #endif /* defined(ARCH_X86) */
00153 
00154 #define RGB2YUV_SHIFT 8
00155 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
00156 #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
00157 #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
00158 #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
00159 #define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
00160 #define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
00161 #define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
00162 #define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
00163 #define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
00164 
00165 //Note: we have C, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
00166 //Plain C versions
00167 #undef HAVE_MMX
00168 #undef HAVE_MMX2
00169 #undef HAVE_3DNOW
00170 #undef HAVE_SSE2
00171 #define RENAME(a) a ## _C
00172 #include "rgb2rgb_template.c"
00173 
00174 #if defined(ARCH_X86) && defined(CONFIG_GPL)
00175 
00176 //MMX versions
00177 #undef RENAME
00178 #define HAVE_MMX
00179 #undef HAVE_MMX2
00180 #undef HAVE_3DNOW
00181 #undef HAVE_SSE2
00182 #define RENAME(a) a ## _MMX
00183 #include "rgb2rgb_template.c"
00184 
00185 //MMX2 versions
00186 #undef RENAME
00187 #define HAVE_MMX
00188 #define HAVE_MMX2
00189 #undef HAVE_3DNOW
00190 #undef HAVE_SSE2
00191 #define RENAME(a) a ## _MMX2
00192 #include "rgb2rgb_template.c"
00193 
00194 //3DNOW versions
00195 #undef RENAME
00196 #define HAVE_MMX
00197 #undef HAVE_MMX2
00198 #define HAVE_3DNOW
00199 #undef HAVE_SSE2
00200 #define RENAME(a) a ## _3DNOW
00201 #include "rgb2rgb_template.c"
00202 
00203 #endif //ARCH_X86 || ARCH_X86_64
00204 
00205 /*
00206  rgb15->rgb16 Original by Strepto/Astral
00207  ported to gcc & bugfixed : A'rpi
00208  MMX2, 3DNOW optimization by Nick Kurshev
00209  32bit c version, and and&add trick by Michael Niedermayer
00210 */
00211 
00212 void sws_rgb2rgb_init(int flags){
00213 #if (defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX))  && defined(CONFIG_GPL)
00214     if (flags & SWS_CPU_CAPS_MMX2)
00215         rgb2rgb_init_MMX2();
00216     else if (flags & SWS_CPU_CAPS_3DNOW)
00217         rgb2rgb_init_3DNOW();
00218     else if (flags & SWS_CPU_CAPS_MMX)
00219         rgb2rgb_init_MMX();
00220     else
00221 #endif /* defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX) */
00222         rgb2rgb_init_C();
00223 }
00224 
00228 void palette8torgb32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00229 {
00230     long i;
00231 
00232 /*
00233     for (i=0; i<num_pixels; i++)
00234         ((unsigned *)dst)[i] = ((unsigned *)palette)[ src[i] ];
00235 */
00236 
00237     for (i=0; i<num_pixels; i++)
00238     {
00239         #ifdef WORDS_BIGENDIAN
00240             dst[3]= palette[ src[i]*4+2 ];
00241             dst[2]= palette[ src[i]*4+1 ];
00242             dst[1]= palette[ src[i]*4+0 ];
00243         #else
00244         //FIXME slow?
00245             dst[0]= palette[ src[i]*4+2 ];
00246             dst[1]= palette[ src[i]*4+1 ];
00247             dst[2]= palette[ src[i]*4+0 ];
00248             //dst[3]= 0; /* do we need this cleansing? */
00249         #endif
00250         dst+= 4;
00251     }
00252 }
00253 
00254 void palette8tobgr32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00255 {
00256     long i;
00257     for (i=0; i<num_pixels; i++)
00258     {
00259         #ifdef WORDS_BIGENDIAN
00260             dst[3]= palette[ src[i]*4+0 ];
00261             dst[2]= palette[ src[i]*4+1 ];
00262             dst[1]= palette[ src[i]*4+2 ];
00263         #else
00264             //FIXME slow?
00265             dst[0]= palette[ src[i]*4+0 ];
00266             dst[1]= palette[ src[i]*4+1 ];
00267             dst[2]= palette[ src[i]*4+2 ];
00268             //dst[3]= 0; /* do we need this cleansing? */
00269         #endif
00270 
00271         dst+= 4;
00272     }
00273 }
00274 
00278 void palette8torgb24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00279 {
00280     long i;
00281 /*
00282     writes 1 byte o much and might cause alignment issues on some architectures?
00283     for (i=0; i<num_pixels; i++)
00284         ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[ src[i] ];
00285 */
00286     for (i=0; i<num_pixels; i++)
00287     {
00288         //FIXME slow?
00289         dst[0]= palette[ src[i]*4+2 ];
00290         dst[1]= palette[ src[i]*4+1 ];
00291         dst[2]= palette[ src[i]*4+0 ];
00292         dst+= 3;
00293     }
00294 }
00295 
00296 void palette8tobgr24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00297 {
00298     long i;
00299 /*
00300     writes 1 byte o much and might cause alignment issues on some architectures?
00301     for (i=0; i<num_pixels; i++)
00302         ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[ src[i] ];
00303 */
00304     for (i=0; i<num_pixels; i++)
00305     {
00306         //FIXME slow?
00307         dst[0]= palette[ src[i]*4+0 ];
00308         dst[1]= palette[ src[i]*4+1 ];
00309         dst[2]= palette[ src[i]*4+2 ];
00310         dst+= 3;
00311     }
00312 }
00313 
00317 void palette8torgb16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00318 {
00319     long i;
00320     for (i=0; i<num_pixels; i++)
00321         ((uint16_t *)dst)[i] = ((uint16_t *)palette)[ src[i] ];
00322 }
00323 void palette8tobgr16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00324 {
00325     long i;
00326     for (i=0; i<num_pixels; i++)
00327         ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[ src[i] ]);
00328 }
00329 
00333 void palette8torgb15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00334 {
00335     long i;
00336     for (i=0; i<num_pixels; i++)
00337         ((uint16_t *)dst)[i] = ((uint16_t *)palette)[ src[i] ];
00338 }
00339 void palette8tobgr15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
00340 {
00341     long i;
00342     for (i=0; i<num_pixels; i++)
00343         ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[ src[i] ]);
00344 }
00345 
00346 void rgb32tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
00347 {
00348     long i;
00349     long num_pixels = src_size >> 2;
00350     for (i=0; i<num_pixels; i++)
00351     {
00352         #ifdef WORDS_BIGENDIAN
00353             /* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
00354             dst[3*i + 0] = src[4*i + 1];
00355             dst[3*i + 1] = src[4*i + 2];
00356             dst[3*i + 2] = src[4*i + 3];
00357         #else
00358             dst[3*i + 0] = src[4*i + 2];
00359             dst[3*i + 1] = src[4*i + 1];
00360             dst[3*i + 2] = src[4*i + 0];
00361         #endif
00362     }
00363 }
00364 
00365 void rgb24tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
00366 {
00367     long i;
00368     for (i=0; 3*i<src_size; i++)
00369     {
00370         #ifdef WORDS_BIGENDIAN
00371             /* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
00372             dst[4*i + 0] = 0;
00373             dst[4*i + 1] = src[3*i + 0];
00374             dst[4*i + 2] = src[3*i + 1];
00375             dst[4*i + 3] = src[3*i + 2];
00376         #else
00377             dst[4*i + 0] = src[3*i + 2];
00378             dst[4*i + 1] = src[3*i + 1];
00379             dst[4*i + 2] = src[3*i + 0];
00380             dst[4*i + 3] = 0;
00381         #endif
00382     }
00383 }
00384 
00385 void rgb16tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
00386 {
00387     const uint16_t *end;
00388     uint8_t *d = (uint8_t *)dst;
00389     const uint16_t *s = (uint16_t *)src;
00390     end = s + src_size/2;
00391     while (s < end)
00392     {
00393         register uint16_t bgr;
00394         bgr = *s++;
00395         #ifdef WORDS_BIGENDIAN
00396             *d++ = 0;
00397             *d++ = (bgr&0x1F)<<3;
00398             *d++ = (bgr&0x7E0)>>3;
00399             *d++ = (bgr&0xF800)>>8;
00400         #else
00401             *d++ = (bgr&0xF800)>>8;
00402             *d++ = (bgr&0x7E0)>>3;
00403             *d++ = (bgr&0x1F)<<3;
00404             *d++ = 0;
00405         #endif
00406     }
00407 }
00408 
00409 void rgb16tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
00410 {
00411     const uint16_t *end;
00412     uint8_t *d = (uint8_t *)dst;
00413     const uint16_t *s = (const uint16_t *)src;
00414     end = s + src_size/2;
00415     while (s < end)
00416     {
00417         register uint16_t bgr;
00418         bgr = *s++;
00419         *d++ = (bgr&0xF800)>>8;
00420         *d++ = (bgr&0x7E0)>>3;
00421         *d++ = (bgr&0x1F)<<3;
00422     }
00423 }
00424 
00425 void rgb16tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
00426 {
00427     long i;
00428     long num_pixels = src_size >> 1;
00429 
00430     for (i=0; i<num_pixels; i++)
00431     {
00432         unsigned b,g,r;
00433         register uint16_t rgb;
00434         rgb = src[2*i];
00435         r = rgb&0x1F;
00436         g = (rgb&0x7E0)>>5;
00437         b = (rgb&0xF800)>>11;
00438         dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
00439     }
00440 }
00441 
00442 void rgb16tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
00443 {
00444     long i;
00445     long num_pixels = src_size >> 1;
00446 
00447     for (i=0; i<num_pixels; i++)
00448     {
00449         unsigned b,g,r;
00450         register uint16_t rgb;
00451         rgb = src[2*i];
00452         r = rgb&0x1F;
00453         g = (rgb&0x7E0)>>5;
00454         b = (rgb&0xF800)>>11;
00455         dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
00456     }
00457 }
00458 
00459 void rgb15tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
00460 {
00461     const uint16_t *end;
00462     uint8_t *d = (uint8_t *)dst;
00463     const uint16_t *s = (const uint16_t *)src;
00464     end = s + src_size/2;
00465     while (s < end)
00466     {
00467         register uint16_t bgr;
00468         bgr = *s++;
00469         #ifdef WORDS_BIGENDIAN
00470             *d++ = 0;
00471             *d++ = (bgr&0x1F)<<3;
00472             *d++ = (bgr&0x3E0)>>2;
00473             *d++ = (bgr&0x7C00)>>7;
00474         #else
00475             *d++ = (bgr&0x7C00)>>7;
00476             *d++ = (bgr&0x3E0)>>2;
00477             *d++ = (bgr&0x1F)<<3;
00478             *d++ = 0;
00479         #endif
00480     }
00481 }
00482 
00483 void rgb15tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
00484 {
00485     const uint16_t *end;
00486     uint8_t *d = (uint8_t *)dst;
00487     const uint16_t *s = (uint16_t *)src;
00488     end = s + src_size/2;
00489     while (s < end)
00490     {
00491         register uint16_t bgr;
00492         bgr = *s++;
00493         *d++ = (bgr&0x7C00)>>7;
00494         *d++ = (bgr&0x3E0)>>2;
00495         *d++ = (bgr&0x1F)<<3;
00496     }
00497 }
00498 
00499 void rgb15tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
00500 {
00501     long i;
00502     long num_pixels = src_size >> 1;
00503 
00504     for (i=0; i<num_pixels; i++)
00505     {
00506         unsigned b,g,r;
00507         register uint16_t rgb;
00508         rgb = src[2*i];
00509         r = rgb&0x1F;
00510         g = (rgb&0x3E0)>>5;
00511         b = (rgb&0x7C00)>>10;
00512         dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
00513     }
00514 }
00515 
00516 void rgb15tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
00517 {
00518     long i;
00519     long num_pixels = src_size >> 1;
00520 
00521     for (i=0; i<num_pixels; i++)
00522     {
00523         unsigned b,g,r;
00524         register uint16_t rgb;
00525         rgb = src[2*i];
00526         r = rgb&0x1F;
00527         g = (rgb&0x3E0)>>5;
00528         b = (rgb&0x7C00)>>10;
00529         dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
00530     }
00531 }
00532 
00533 void rgb8tobgr8(const uint8_t *src, uint8_t *dst, long src_size)
00534 {
00535     long i;
00536     long num_pixels = src_size;
00537     for (i=0; i<num_pixels; i++)
00538     {
00539         unsigned b,g,r;
00540         register uint8_t rgb;
00541         rgb = src[i];
00542         r = (rgb&0x07);
00543         g = (rgb&0x38)>>3;
00544         b = (rgb&0xC0)>>6;
00545         dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
00546     }
00547 }