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ffmpeg / libswscale / rgb2rgb.c @ d334c7c2

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/*
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 *  rgb2rgb.c, Software RGB to RGB convertor
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 *  pluralize by Software PAL8 to RGB convertor
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 *               Software YUV to YUV convertor
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 *               Software YUV to RGB convertor
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 *  Written by Nick Kurshev.
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 *  palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg 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; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * FFmpeg 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 FFmpeg; 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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 * the C code (not assembly, mmx, ...) of this file can be used
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 * under the LGPL license too
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 */
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#include <inttypes.h>
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#include "config.h"
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#include "rgb2rgb.h"
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#include "swscale.h"
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#include "swscale_internal.h"
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#include "x86_cpu.h"
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#include "bswap.h"
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#define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
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void (*rgb24to32)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb24to16)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb24to15)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32to24)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32to16)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32to15)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb15to16)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb15to24)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb15to32)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb16to15)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb16to24)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb16to32)(const uint8_t *src, uint8_t *dst, long src_size);
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//void (*rgb24tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb24tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb24tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb24tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long src_size);
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//void (*rgb32tobgr24)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32tobgr16)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*rgb32tobgr15)(const uint8_t *src, uint8_t *dst, long src_size);
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void (*yv12toyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
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                   long width, long height,
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                   long lumStride, long chromStride, long dstStride);
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void (*yv12touyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
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                   long width, long height,
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                   long lumStride, long chromStride, long dstStride);
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void (*yuv422ptoyuy2)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
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                      long width, long height,
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                      long lumStride, long chromStride, long dstStride);
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void (*yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                   long width, long height,
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                   long lumStride, long chromStride, long srcStride);
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void (*rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                    long width, long height,
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                    long lumStride, long chromStride, long srcStride);
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void (*planar2x)(const uint8_t *src, uint8_t *dst, long width, long height,
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                 long srcStride, long dstStride);
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void (*interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dst,
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                        long width, long height, long src1Stride,
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                        long src2Stride, long dstStride);
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void (*vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
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                    uint8_t *dst1, uint8_t *dst2,
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                    long width, long height,
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                    long srcStride1, long srcStride2,
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                    long dstStride1, long dstStride2);
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void (*yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2, const uint8_t *src3,
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                     uint8_t *dst,
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                     long width, long height,
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                     long srcStride1, long srcStride2,
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                     long srcStride3, long dstStride);
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#if defined(ARCH_X86) && defined(CONFIG_GPL)
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DECLARE_ASM_CONST(8, uint64_t, mmx_null)     = 0x0000000000000000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mmx_one)      = 0xFFFFFFFFFFFFFFFFULL;
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DECLARE_ASM_CONST(8, uint64_t, mask32b)      = 0x000000FF000000FFULL;
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DECLARE_ASM_CONST(8, uint64_t, mask32g)      = 0x0000FF000000FF00ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask32r)      = 0x00FF000000FF0000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask32)       = 0x00FFFFFF00FFFFFFULL;
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DECLARE_ASM_CONST(8, uint64_t, mask3216br)   = 0x00F800F800F800F8ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask3216g)    = 0x0000FC000000FC00ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask3215g)    = 0x0000F8000000F800ULL;
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DECLARE_ASM_CONST(8, uint64_t, mul3216)      = 0x2000000420000004ULL;
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DECLARE_ASM_CONST(8, uint64_t, mul3215)      = 0x2000000820000008ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24b)      = 0x00FF0000FF0000FFULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24g)      = 0xFF0000FF0000FF00ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24r)      = 0x0000FF0000FF0000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24l)      = 0x0000000000FFFFFFULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24h)      = 0x0000FFFFFF000000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24hh)     = 0xffff000000000000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24hhh)    = 0xffffffff00000000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask24hhhh)   = 0xffffffffffff0000ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask15b)      = 0x001F001F001F001FULL; /* 00000000 00011111  xxB */
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DECLARE_ASM_CONST(8, uint64_t, mask15rg)     = 0x7FE07FE07FE07FE0ULL; /* 01111111 11100000  RGx */
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DECLARE_ASM_CONST(8, uint64_t, mask15s)      = 0xFFE0FFE0FFE0FFE0ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask15g)      = 0x03E003E003E003E0ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask15r)      = 0x7C007C007C007C00ULL;
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#define mask16b mask15b
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DECLARE_ASM_CONST(8, uint64_t, mask16g)      = 0x07E007E007E007E0ULL;
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DECLARE_ASM_CONST(8, uint64_t, mask16r)      = 0xF800F800F800F800ULL;
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DECLARE_ASM_CONST(8, uint64_t, red_16mask)   = 0x0000f8000000f800ULL;
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DECLARE_ASM_CONST(8, uint64_t, green_16mask) = 0x000007e0000007e0ULL;
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DECLARE_ASM_CONST(8, uint64_t, blue_16mask)  = 0x0000001f0000001fULL;
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DECLARE_ASM_CONST(8, uint64_t, red_15mask)   = 0x00007c0000007c00ULL;
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DECLARE_ASM_CONST(8, uint64_t, green_15mask) = 0x000003e0000003e0ULL;
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DECLARE_ASM_CONST(8, uint64_t, blue_15mask)  = 0x0000001f0000001fULL;
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#ifdef FAST_BGR2YV12
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DECLARE_ASM_CONST(8, uint64_t, bgr2YCoeff)   = 0x000000210041000DULL;
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DECLARE_ASM_CONST(8, uint64_t, bgr2UCoeff)   = 0x0000FFEEFFDC0038ULL;
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DECLARE_ASM_CONST(8, uint64_t, bgr2VCoeff)   = 0x00000038FFD2FFF8ULL;
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#else
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DECLARE_ASM_CONST(8, uint64_t, bgr2YCoeff)   = 0x000020E540830C8BULL;
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DECLARE_ASM_CONST(8, uint64_t, bgr2UCoeff)   = 0x0000ED0FDAC23831ULL;
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DECLARE_ASM_CONST(8, uint64_t, bgr2VCoeff)   = 0x00003831D0E6F6EAULL;
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#endif
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DECLARE_ASM_CONST(8, uint64_t, bgr2YOffset)  = 0x1010101010101010ULL;
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DECLARE_ASM_CONST(8, uint64_t, bgr2UVOffset) = 0x8080808080808080ULL;
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DECLARE_ASM_CONST(8, uint64_t, w1111)        = 0x0001000100010001ULL;
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#if 0
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static volatile uint64_t __attribute__((aligned(8))) b5Dither;
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static volatile uint64_t __attribute__((aligned(8))) g5Dither;
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static volatile uint64_t __attribute__((aligned(8))) g6Dither;
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static volatile uint64_t __attribute__((aligned(8))) r5Dither;
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static uint64_t __attribute__((aligned(8))) dither4[2]={
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    0x0103010301030103LL,
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    0x0200020002000200LL,};
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static uint64_t __attribute__((aligned(8))) dither8[2]={
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    0x0602060206020602LL,
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    0x0004000400040004LL,};
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#endif
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#endif /* defined(ARCH_X86) */
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#define RGB2YUV_SHIFT 8
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#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
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#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
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#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
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#define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
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#define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
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#define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
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#define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
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#define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
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#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
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//Note: we have C, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
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//Plain C versions
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#undef HAVE_MMX
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#undef HAVE_MMX2
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#undef HAVE_3DNOW
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#undef HAVE_SSE2
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#define RENAME(a) a ## _C
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#include "rgb2rgb_template.c"
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#if defined(ARCH_X86) && defined(CONFIG_GPL)
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//MMX versions
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#undef RENAME
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#define HAVE_MMX
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#undef HAVE_MMX2
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#undef HAVE_3DNOW
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#undef HAVE_SSE2
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#define RENAME(a) a ## _MMX
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#include "rgb2rgb_template.c"
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//MMX2 versions
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#undef RENAME
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#define HAVE_MMX
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#define HAVE_MMX2
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#undef HAVE_3DNOW
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#undef HAVE_SSE2
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#define RENAME(a) a ## _MMX2
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#include "rgb2rgb_template.c"
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//3DNOW versions
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#undef RENAME
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#define HAVE_MMX
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#undef HAVE_MMX2
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#define HAVE_3DNOW
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#undef HAVE_SSE2
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#define RENAME(a) a ## _3DNOW
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#include "rgb2rgb_template.c"
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#endif //ARCH_X86 || ARCH_X86_64
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/*
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 rgb15->rgb16 Original by Strepto/Astral
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 ported to gcc & bugfixed : A'rpi
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 MMX2, 3DNOW optimization by Nick Kurshev
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 32bit c version, and and&add trick by Michael Niedermayer
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*/
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void sws_rgb2rgb_init(int flags){
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#if (defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX))  && defined(CONFIG_GPL)
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    if (flags & SWS_CPU_CAPS_MMX2)
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        rgb2rgb_init_MMX2();
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    else if (flags & SWS_CPU_CAPS_3DNOW)
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        rgb2rgb_init_3DNOW();
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    else if (flags & SWS_CPU_CAPS_MMX)
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        rgb2rgb_init_MMX();
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    else
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#endif /* defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX) */
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        rgb2rgb_init_C();
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}
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/**
226
 * Palette is assumed to contain BGR32.
227
 */
228
void palette8torgb32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
229
{
230
    long i;
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/*
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    for (i=0; i<num_pixels; i++)
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        ((unsigned *)dst)[i] = ((unsigned *)palette)[src[i]];
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*/
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    for (i=0; i<num_pixels; i++)
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    {
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        #ifdef WORDS_BIGENDIAN
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            dst[3]= palette[src[i]*4+2];
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            dst[2]= palette[src[i]*4+1];
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            dst[1]= palette[src[i]*4+0];
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        #else
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        //FIXME slow?
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            dst[0]= palette[src[i]*4+2];
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            dst[1]= palette[src[i]*4+1];
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            dst[2]= palette[src[i]*4+0];
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            //dst[3]= 0; /* do we need this cleansing? */
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        #endif
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        dst+= 4;
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    }
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}
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void palette8tobgr32(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
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{
256
    long i;
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    for (i=0; i<num_pixels; i++)
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    {
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        #ifdef WORDS_BIGENDIAN
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            dst[3]= palette[src[i]*4+0];
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            dst[2]= palette[src[i]*4+1];
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            dst[1]= palette[src[i]*4+2];
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        #else
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            //FIXME slow?
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            dst[0]= palette[src[i]*4+0];
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            dst[1]= palette[src[i]*4+1];
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            dst[2]= palette[src[i]*4+2];
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            //dst[3]= 0; /* do we need this cleansing? */
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        #endif
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271
        dst+= 4;
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    }
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}
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/**
276
 * Palette is assumed to contain BGR32.
277
 */
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void palette8torgb24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
279
{
280
    long i;
281
/*
282
    writes 1 byte o much and might cause alignment issues on some architectures?
283
    for (i=0; i<num_pixels; i++)
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        ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[src[i]];
285
*/
286
    for (i=0; i<num_pixels; i++)
287
    {
288
        //FIXME slow?
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        dst[0]= palette[src[i]*4+2];
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        dst[1]= palette[src[i]*4+1];
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        dst[2]= palette[src[i]*4+0];
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        dst+= 3;
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    }
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}
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void palette8tobgr24(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
297
{
298
    long i;
299
/*
300
    writes 1 byte o much and might cause alignment issues on some architectures?
301
    for (i=0; i<num_pixels; i++)
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        ((unsigned *)(&dst[i*3])) = ((unsigned *)palette)[src[i]];
303
*/
304
    for (i=0; i<num_pixels; i++)
305
    {
306
        //FIXME slow?
307
        dst[0]= palette[src[i]*4+0];
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        dst[1]= palette[src[i]*4+1];
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        dst[2]= palette[src[i]*4+2];
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        dst+= 3;
311
    }
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}
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314
/**
315
 * Palette is assumed to contain bgr16, see rgb32to16 to convert the palette
316
 */
317
void palette8torgb16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
318
{
319
    long i;
320
    for (i=0; i<num_pixels; i++)
321
        ((uint16_t *)dst)[i] = ((uint16_t *)palette)[src[i]];
322
}
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void palette8tobgr16(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
324
{
325
    long i;
326
    for (i=0; i<num_pixels; i++)
327
        ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[src[i]]);
328
}
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330
/**
331
 * Palette is assumed to contain BGR15, see rgb32to15 to convert the palette.
332
 */
333
void palette8torgb15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
334
{
335
    long i;
336
    for (i=0; i<num_pixels; i++)
337
        ((uint16_t *)dst)[i] = ((uint16_t *)palette)[src[i]];
338
}
339
void palette8tobgr15(const uint8_t *src, uint8_t *dst, long num_pixels, const uint8_t *palette)
340
{
341
    long i;
342
    for (i=0; i<num_pixels; i++)
343
        ((uint16_t *)dst)[i] = bswap_16(((uint16_t *)palette)[src[i]]);
344
}
345

    
346
void rgb32tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
347
{
348
    long i;
349
    long num_pixels = src_size >> 2;
350
    for (i=0; i<num_pixels; i++)
351
    {
352
        #ifdef WORDS_BIGENDIAN
353
            /* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
354
            dst[3*i + 0] = src[4*i + 1];
355
            dst[3*i + 1] = src[4*i + 2];
356
            dst[3*i + 2] = src[4*i + 3];
357
        #else
358
            dst[3*i + 0] = src[4*i + 2];
359
            dst[3*i + 1] = src[4*i + 1];
360
            dst[3*i + 2] = src[4*i + 0];
361
        #endif
362
    }
363
}
364

    
365
void rgb24tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
366
{
367
    long i;
368
    for (i=0; 3*i<src_size; i++)
369
    {
370
        #ifdef WORDS_BIGENDIAN
371
            /* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
372
            dst[4*i + 0] = 0;
373
            dst[4*i + 1] = src[3*i + 0];
374
            dst[4*i + 2] = src[3*i + 1];
375
            dst[4*i + 3] = src[3*i + 2];
376
        #else
377
            dst[4*i + 0] = src[3*i + 2];
378
            dst[4*i + 1] = src[3*i + 1];
379
            dst[4*i + 2] = src[3*i + 0];
380
            dst[4*i + 3] = 0;
381
        #endif
382
    }
383
}
384

    
385
void rgb16tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
386
{
387
    const uint16_t *end;
388
    uint8_t *d = (uint8_t *)dst;
389
    const uint16_t *s = (uint16_t *)src;
390
    end = s + src_size/2;
391
    while (s < end)
392
    {
393
        register uint16_t bgr;
394
        bgr = *s++;
395
        #ifdef WORDS_BIGENDIAN
396
            *d++ = 0;
397
            *d++ = (bgr&0x1F)<<3;
398
            *d++ = (bgr&0x7E0)>>3;
399
            *d++ = (bgr&0xF800)>>8;
400
        #else
401
            *d++ = (bgr&0xF800)>>8;
402
            *d++ = (bgr&0x7E0)>>3;
403
            *d++ = (bgr&0x1F)<<3;
404
            *d++ = 0;
405
        #endif
406
    }
407
}
408

    
409
void rgb16tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
410
{
411
    const uint16_t *end;
412
    uint8_t *d = (uint8_t *)dst;
413
    const uint16_t *s = (const uint16_t *)src;
414
    end = s + src_size/2;
415
    while (s < end)
416
    {
417
        register uint16_t bgr;
418
        bgr = *s++;
419
        *d++ = (bgr&0xF800)>>8;
420
        *d++ = (bgr&0x7E0)>>3;
421
        *d++ = (bgr&0x1F)<<3;
422
    }
423
}
424

    
425
void rgb16tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
426
{
427
    long i;
428
    long num_pixels = src_size >> 1;
429

    
430
    for (i=0; i<num_pixels; i++)
431
    {
432
        unsigned b,g,r;
433
        register uint16_t rgb;
434
        rgb = src[2*i];
435
        r = rgb&0x1F;
436
        g = (rgb&0x7E0)>>5;
437
        b = (rgb&0xF800)>>11;
438
        dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
439
    }
440
}
441

    
442
void rgb16tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
443
{
444
    long i;
445
    long num_pixels = src_size >> 1;
446

    
447
    for (i=0; i<num_pixels; i++)
448
    {
449
        unsigned b,g,r;
450
        register uint16_t rgb;
451
        rgb = src[2*i];
452
        r = rgb&0x1F;
453
        g = (rgb&0x7E0)>>5;
454
        b = (rgb&0xF800)>>11;
455
        dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
456
    }
457
}
458

    
459
void rgb15tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
460
{
461
    const uint16_t *end;
462
    uint8_t *d = (uint8_t *)dst;
463
    const uint16_t *s = (const uint16_t *)src;
464
    end = s + src_size/2;
465
    while (s < end)
466
    {
467
        register uint16_t bgr;
468
        bgr = *s++;
469
        #ifdef WORDS_BIGENDIAN
470
            *d++ = 0;
471
            *d++ = (bgr&0x1F)<<3;
472
            *d++ = (bgr&0x3E0)>>2;
473
            *d++ = (bgr&0x7C00)>>7;
474
        #else
475
            *d++ = (bgr&0x7C00)>>7;
476
            *d++ = (bgr&0x3E0)>>2;
477
            *d++ = (bgr&0x1F)<<3;
478
            *d++ = 0;
479
        #endif
480
    }
481
}
482

    
483
void rgb15tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
484
{
485
    const uint16_t *end;
486
    uint8_t *d = (uint8_t *)dst;
487
    const uint16_t *s = (uint16_t *)src;
488
    end = s + src_size/2;
489
    while (s < end)
490
    {
491
        register uint16_t bgr;
492
        bgr = *s++;
493
        *d++ = (bgr&0x7C00)>>7;
494
        *d++ = (bgr&0x3E0)>>2;
495
        *d++ = (bgr&0x1F)<<3;
496
    }
497
}
498

    
499
void rgb15tobgr16(const uint8_t *src, uint8_t *dst, long src_size)
500
{
501
    long i;
502
    long num_pixels = src_size >> 1;
503

    
504
    for (i=0; i<num_pixels; i++)
505
    {
506
        unsigned b,g,r;
507
        register uint16_t rgb;
508
        rgb = src[2*i];
509
        r = rgb&0x1F;
510
        g = (rgb&0x3E0)>>5;
511
        b = (rgb&0x7C00)>>10;
512
        dst[2*i] = (b&0x1F) | ((g&0x3F)<<5) | ((r&0x1F)<<11);
513
    }
514
}
515

    
516
void rgb15tobgr15(const uint8_t *src, uint8_t *dst, long src_size)
517
{
518
    long i;
519
    long num_pixels = src_size >> 1;
520

    
521
    for (i=0; i<num_pixels; i++)
522
    {
523
        unsigned b,g,r;
524
        register uint16_t rgb;
525
        rgb = src[2*i];
526
        r = rgb&0x1F;
527
        g = (rgb&0x3E0)>>5;
528
        b = (rgb&0x7C00)>>10;
529
        dst[2*i] = (b&0x1F) | ((g&0x1F)<<5) | ((r&0x1F)<<10);
530
    }
531
}
532

    
533
void rgb8tobgr8(const uint8_t *src, uint8_t *dst, long src_size)
534
{
535
    long i;
536
    long num_pixels = src_size;
537
    for (i=0; i<num_pixels; i++)
538
    {
539
        unsigned b,g,r;
540
        register uint8_t rgb;
541
        rgb = src[i];
542
        r = (rgb&0x07);
543
        g = (rgb&0x38)>>3;
544
        b = (rgb&0xC0)>>6;
545
        dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
546
    }
547
}