rgb2rgb.c 11.1 KB
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/*
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 * software RGB to RGB converter
 * pluralize by software PAL8 to RGB converter
 *              software YUV to YUV converter
 *              software YUV to RGB converter
 * Written by Nick Kurshev.
 * palette & YUV & runtime CPU stuff by Michael (michaelni@gmx.at)
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav 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 GNU
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; 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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#include <inttypes.h>
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#include "config.h"
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#include "libavutil/bswap.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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void (*rgb24tobgr32)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb24tobgr16)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb24tobgr15)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb32tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb32to16)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb32to15)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb15to16)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb15tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb15to32)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb16to15)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb16tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb16to32)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb24tobgr24)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb24to16)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb24to15)(const uint8_t *src, uint8_t *dst, int src_size);
void (*shuffle_bytes_2103)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb32tobgr16)(const uint8_t *src, uint8_t *dst, int src_size);
void (*rgb32tobgr15)(const uint8_t *src, uint8_t *dst, int 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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                   int width, int height,
                   int lumStride, int chromStride, int 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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                   int width, int height,
                   int lumStride, int chromStride, int 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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                      int width, int height,
                      int lumStride, int chromStride, int dstStride);
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void (*yuv422ptouyvy)(const uint8_t *ysrc, const uint8_t *usrc, const uint8_t *vsrc, uint8_t *dst,
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                      int width, int height,
                      int lumStride, int chromStride, int dstStride);
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void (*yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                   int width, int height,
                   int lumStride, int chromStride, int srcStride);
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void (*rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                    int width, int height,
                    int lumStride, int chromStride, int srcStride);
void (*planar2x)(const uint8_t *src, uint8_t *dst, int width, int height,
                 int srcStride, int dstStride);
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void (*interleaveBytes)(const uint8_t *src1, const uint8_t *src2, uint8_t *dst,
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                        int width, int height, int src1Stride,
                        int src2Stride, int 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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                    int width, int height,
                    int srcStride1, int srcStride2,
                    int dstStride1, int 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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                     int width, int height,
                     int srcStride1, int srcStride2,
                     int srcStride3, int dstStride);
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void (*uyvytoyuv420)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
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                     int width, int height,
                     int lumStride, int chromStride, int srcStride);
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void (*uyvytoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
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                     int width, int height,
                     int lumStride, int chromStride, int srcStride);
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void (*yuyvtoyuv420)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
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                     int width, int height,
                     int lumStride, int chromStride, int srcStride);
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void (*yuyvtoyuv422)(uint8_t *ydst, uint8_t *udst, uint8_t *vdst, const uint8_t *src,
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                     int width, int height,
                     int lumStride, int chromStride, int srcStride);
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#define RGB2YUV_SHIFT 8
#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
#define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
#define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
#define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
#define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
#define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))

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//plain C versions
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#include "rgb2rgb_template.c"

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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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 32-bit C version, and and&add trick by Michael Niedermayer
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*/
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void sws_rgb2rgb_init(void)
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{
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    rgb2rgb_init_c();
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    if (HAVE_MMX)
        rgb2rgb_init_x86();
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}
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void rgb32to24(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size >> 2;
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    for (i=0; i<num_pixels; i++) {
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#if HAVE_BIGENDIAN
        /* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
        dst[3*i + 0] = src[4*i + 1];
        dst[3*i + 1] = src[4*i + 2];
        dst[3*i + 2] = src[4*i + 3];
#else
        dst[3*i + 0] = src[4*i + 2];
        dst[3*i + 1] = src[4*i + 1];
        dst[3*i + 2] = src[4*i + 0];
#endif
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    }
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}

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void rgb24to32(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
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    for (i=0; 3*i<src_size; i++) {
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#if HAVE_BIGENDIAN
        /* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
        dst[4*i + 0] = 255;
        dst[4*i + 1] = src[3*i + 0];
        dst[4*i + 2] = src[3*i + 1];
        dst[4*i + 3] = src[3*i + 2];
#else
        dst[4*i + 0] = src[3*i + 2];
        dst[4*i + 1] = src[3*i + 1];
        dst[4*i + 2] = src[3*i + 0];
        dst[4*i + 3] = 255;
#endif
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    }
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}

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void rgb16tobgr32(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    const uint16_t *end;
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    uint8_t *d = dst;
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    const uint16_t *s = (const uint16_t *)src;
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    end = s + src_size/2;
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    while (s < end) {
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        register uint16_t bgr;
        bgr = *s++;
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#if HAVE_BIGENDIAN
        *d++ = 255;
        *d++ = (bgr&0x1F)<<3;
        *d++ = (bgr&0x7E0)>>3;
        *d++ = (bgr&0xF800)>>8;
#else
        *d++ = (bgr&0xF800)>>8;
        *d++ = (bgr&0x7E0)>>3;
        *d++ = (bgr&0x1F)<<3;
        *d++ = 255;
#endif
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    }
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}

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void rgb16to24(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    const uint16_t *end;
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    uint8_t *d = dst;
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    const uint16_t *s = (const uint16_t *)src;
    end = s + src_size/2;
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    while (s < end) {
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        register uint16_t bgr;
        bgr = *s++;
        *d++ = (bgr&0xF800)>>8;
        *d++ = (bgr&0x7E0)>>3;
        *d++ = (bgr&0x1F)<<3;
    }
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}

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void rgb16tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size >> 1;
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    for (i=0; i<num_pixels; i++) {
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        unsigned rgb = ((const uint16_t*)src)[i];
        ((uint16_t*)dst)[i] = (rgb>>11) | (rgb&0x7E0) | (rgb<<11);
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    }
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}

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void rgb16tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size >> 1;
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    for (i=0; i<num_pixels; i++) {
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        unsigned rgb = ((const uint16_t*)src)[i];
        ((uint16_t*)dst)[i] = (rgb>>11) | ((rgb&0x7C0)>>1) | ((rgb&0x1F)<<10);
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    }
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}

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void rgb15tobgr32(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    const uint16_t *end;
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    uint8_t *d = dst;
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    const uint16_t *s = (const uint16_t *)src;
    end = s + src_size/2;
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    while (s < end) {
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        register uint16_t bgr;
        bgr = *s++;
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#if HAVE_BIGENDIAN
        *d++ = 255;
        *d++ = (bgr&0x1F)<<3;
        *d++ = (bgr&0x3E0)>>2;
        *d++ = (bgr&0x7C00)>>7;
#else
        *d++ = (bgr&0x7C00)>>7;
        *d++ = (bgr&0x3E0)>>2;
        *d++ = (bgr&0x1F)<<3;
        *d++ = 255;
#endif
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    }
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}

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void rgb15to24(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    const uint16_t *end;
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    uint8_t *d = dst;
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    const uint16_t *s = (const uint16_t *)src;
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    end = s + src_size/2;
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    while (s < end) {
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        register uint16_t bgr;
        bgr = *s++;
        *d++ = (bgr&0x7C00)>>7;
        *d++ = (bgr&0x3E0)>>2;
        *d++ = (bgr&0x1F)<<3;
    }
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}

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void rgb15tobgr16(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size >> 1;
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    for (i=0; i<num_pixels; i++) {
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        unsigned rgb = ((const uint16_t*)src)[i];
        ((uint16_t*)dst)[i] = ((rgb&0x7C00)>>10) | ((rgb&0x3E0)<<1) | (rgb<<11);
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    }
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}

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void rgb15tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size >> 1;
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    for (i=0; i<num_pixels; i++) {
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        unsigned br;
        unsigned rgb = ((const uint16_t*)src)[i];
        br = rgb&0x7c1F;
        ((uint16_t*)dst)[i] = (br>>10) | (rgb&0x3E0) | (br<<10);
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    }
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}

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void bgr8torgb8(const uint8_t *src, uint8_t *dst, int src_size)
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{
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    int i;
    int num_pixels = src_size;
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    for (i=0; i<num_pixels; i++) {
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        unsigned b,g,r;
        register uint8_t rgb;
        rgb = src[i];
        r = (rgb&0x07);
        g = (rgb&0x38)>>3;
        b = (rgb&0xC0)>>6;
        dst[i] = ((b<<1)&0x07) | ((g&0x07)<<3) | ((r&0x03)<<6);
    }
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}
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#define DEFINE_SHUFFLE_BYTES(a, b, c, d)                                \
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void shuffle_bytes_##a##b##c##d(const uint8_t *src, uint8_t *dst, int src_size) \
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{                                                                       \
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    int i;                                                             \
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                                                                        \
    for (i = 0; i < src_size; i+=4) {                                   \
        dst[i + 0] = src[i + a];                                        \
        dst[i + 1] = src[i + b];                                        \
        dst[i + 2] = src[i + c];                                        \
        dst[i + 3] = src[i + d];                                        \
    }                                                                   \
}

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DEFINE_SHUFFLE_BYTES(0, 3, 2, 1)
DEFINE_SHUFFLE_BYTES(1, 2, 3, 0)
DEFINE_SHUFFLE_BYTES(3, 0, 1, 2)
DEFINE_SHUFFLE_BYTES(3, 2, 1, 0)
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