/*

 * 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)

 * lot of big-endian byte order fixes by Alex Beregszaszi

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * 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.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include <stddef.h>

#include "libavutil/attributes.h"

static inline void rgb24tobgr32_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint8_t *dest      = dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

#if HAVE_BIGENDIAN

        /* RGB24 (= R, G, B) -> RGB32 (= A, B, G, R) */

        *dest++  = 255;

        *dest++  = s[2];

        *dest++  = s[1];

        *dest++  = s[0];

        s       += 3;

#else

        *dest++  = *s++;

        *dest++  = *s++;

        *dest++  = *s++;

        *dest++  = 255;

#endif

    }

}

static inline void rgb32tobgr24_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint8_t *dest      = dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

#if HAVE_BIGENDIAN

        /* RGB32 (= A, B, G, R) -> RGB24 (= R, G, B) */

        s++;

        dest[2]  = *s++;

        dest[1]  = *s++;

        dest[0]  = *s++;

        dest    += 3;

#else

        *dest++  = *s++;

        *dest++  = *s++;

        *dest++  = *s++;

        s++;

#endif

    }

}

/*

 * original by Strepto/Astral

 * ported to gcc & bugfixed: A'rpi

 * MMXEXT, 3DNOW optimization by Nick Kurshev

 * 32-bit C version, and and&add trick by Michael Niedermayer

 */

static inline void rgb15to16_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    register uint8_t *d         = dst;

    register const uint8_t *s   = src;

    register const uint8_t *end = s + src_size;

    const uint8_t *mm_end       = end - 3;

    while (s < mm_end) {

        register unsigned x = *((const uint32_t *)s);

        *((uint32_t *)d)    = (x & 0x7FFF7FFF) + (x & 0x7FE07FE0);

        d += 4;

        s += 4;

    }

    if (s < end) {

        register unsigned short x = *((const uint16_t *)s);

        *((uint16_t *)d)          = (x & 0x7FFF) + (x & 0x7FE0);

    }

}

static inline void rgb16to15_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    register uint8_t *d         = dst;

    register const uint8_t *s   = src;

    register const uint8_t *end = s + src_size;

    const uint8_t *mm_end       = end - 3;

    while (s < mm_end) {

        register uint32_t x  = *((const uint32_t *)s);

        *((uint32_t *)d)     = ((x >> 1) & 0x7FE07FE0) | (x & 0x001F001F);

        s                   += 4;

        d                   += 4;

    }

    if (s < end) {

        register uint16_t x = *((const uint16_t *)s);

        *((uint16_t *)d)    = ((x >> 1) & 0x7FE0) | (x & 0x001F);

    }

}

static inline void rgb32to16_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        register int rgb  = *(const uint32_t *)s;

        s                += 4;

        *d++              = ((rgb & 0xFF)     >> 3) +

                            ((rgb & 0xFC00)   >> 5) +

                            ((rgb & 0xF80000) >> 8);

    }

}

static inline void rgb32tobgr16_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        register int rgb  = *(const uint32_t *)s;

        s                += 4;

        *d++              = ((rgb & 0xF8)     << 8) +

                            ((rgb & 0xFC00)   >> 5) +

                            ((rgb & 0xF80000) >> 19);

    }

}

static inline void rgb32to15_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        register int rgb  = *(const uint32_t *)s;

        s                += 4;

        *d++              = ((rgb & 0xFF)     >> 3) +

                            ((rgb & 0xF800)   >> 6) +

                            ((rgb & 0xF80000) >> 9);

    }

}

static inline void rgb32tobgr15_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        register int rgb  = *(const uint32_t *)s;

        s                += 4;

        *d++              = ((rgb & 0xF8)     <<  7) +

                            ((rgb & 0xF800)   >>  6) +

                            ((rgb & 0xF80000) >> 19);

    }

}

static inline void rgb24tobgr16_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        const int b = *s++;

        const int g = *s++;

        const int r = *s++;

        *d++        = (b >> 3) | ((g & 0xFC) << 3) | ((r & 0xF8) << 8);

    }

}

static inline void rgb24to16_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        const int r = *s++;

        const int g = *s++;

        const int b = *s++;

        *d++        = (b >> 3) | ((g & 0xFC) << 3) | ((r & 0xF8) << 8);

    }

}

static inline void rgb24tobgr15_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        const int b = *s++;

        const int g = *s++;

        const int r = *s++;

        *d++        = (b >> 3) | ((g & 0xF8) << 2) | ((r & 0xF8) << 7);

    }

}

static inline void rgb24to15_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint16_t *d        = (uint16_t *)dst;

    const uint8_t *s   = src;

    const uint8_t *end = s + src_size;

    while (s < end) {

        const int r = *s++;

        const int g = *s++;

        const int b = *s++;

        *d++        = (b >> 3) | ((g & 0xF8) << 2) | ((r & 0xF8) << 7);

    }

}

static inline void rgb15tobgr24_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint8_t *d          = dst;

    const uint16_t *s   = (const uint16_t *)src;

    const uint16_t *end = s + src_size / 2;

    while (s < end) {

        register uint16_t bgr = *s++;

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

        *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7);

        *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12);

    }

}

static inline void rgb16tobgr24_c(const uint8_t *src, uint8_t *dst,

                                  int src_size)

{

    uint8_t *d          = (uint8_t *)dst;

    const uint16_t *s   = (const uint16_t *)src;

    const uint16_t *end = s + src_size / 2;

    while (s < end) {

        register uint16_t bgr = *s++;

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

        *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9);

        *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13);

    }

}

static inline void rgb15to32_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint8_t *d          = dst;

    const uint16_t *s   = (const uint16_t *)src;

    const uint16_t *end = s + src_size / 2;

    while (s < end) {

        register uint16_t bgr = *s++;

#if HAVE_BIGENDIAN

        *d++ = 255;

        *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12);

        *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7);

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

#else

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

        *d++ = ((bgr&0x03E0)>>2) | ((bgr&0x03E0)>> 7);

        *d++ = ((bgr&0x7C00)>>7) | ((bgr&0x7C00)>>12);

        *d++ = 255;

#endif

    }

}

static inline void rgb16to32_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    uint8_t *d          = dst;

    const uint16_t *s   = (const uint16_t *)src;

    const uint16_t *end = s + src_size / 2;

    while (s < end) {

        register uint16_t bgr = *s++;

#if HAVE_BIGENDIAN

        *d++ = 255;

        *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13);

        *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9);

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

#else

        *d++ = ((bgr&0x001F)<<3) | ((bgr&0x001F)>> 2);

        *d++ = ((bgr&0x07E0)>>3) | ((bgr&0x07E0)>> 9);

        *d++ = ((bgr&0xF800)>>8) | ((bgr&0xF800)>>13);

        *d++ = 255;

#endif

    }

}

static inline void shuffle_bytes_2103_c(const uint8_t *src, uint8_t *dst,

                                        int src_size)

{

    int idx          = 15  - src_size;

    const uint8_t *s = src - idx;

    uint8_t *d       = dst - idx;

    for (; idx < 15; idx += 4) {

        register unsigned v   = *(const uint32_t *)&s[idx], g = v & 0xff00ff00;

        v                    &= 0xff00ff;

        *(uint32_t *)&d[idx]  = (v >> 16) + g + (v << 16);

    }

}

static inline void shuffle_bytes_0321_c(const uint8_t *src, uint8_t *dst,

                                        int src_size)

{

    int idx          = 15  - src_size;

    const uint8_t *s = src - idx;

    uint8_t *d       = dst - idx;

    for (; idx < 15; idx += 4) {

        register unsigned v   = *(const uint32_t *)&s[idx], g = v & 0x00ff00ff;

        v                    &= 0xff00ff00;

        *(uint32_t *)&d[idx]  = (v >> 16) + g + (v << 16);

    }

}

#define DEFINE_SHUFFLE_BYTES(name, a, b, c, d)                          \

static void shuffle_bytes_##name (const uint8_t *src,                   \

                                        uint8_t *dst, int src_size)     \

{                                                                       \

    int i;                                                              \

                                                                        \

    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];                                        \

    }                                                                   \

}

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_1230_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_3012_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_3210_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_3102_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_2013_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_2130_c

Unexecuted instantiation: rgb2rgb.c:shuffle_bytes_1203_c

DEFINE_SHUFFLE_BYTES(1230_c, 1, 2, 3, 0)

DEFINE_SHUFFLE_BYTES(3012_c, 3, 0, 1, 2)

DEFINE_SHUFFLE_BYTES(3210_c, 3, 2, 1, 0)

DEFINE_SHUFFLE_BYTES(3102_c, 3, 1, 0, 2)

DEFINE_SHUFFLE_BYTES(2013_c, 2, 0, 1, 3)

DEFINE_SHUFFLE_BYTES(2130_c, 2, 1, 3, 0)

DEFINE_SHUFFLE_BYTES(1203_c, 1, 2, 0, 3)

static inline void rgb24tobgr24_c(const uint8_t *src, uint8_t *dst, int src_size)

{

    unsigned i;

    for (i = 0; i < src_size; i += 3) {

        register uint8_t x = src[i + 2];

        dst[i + 1]         = src[i + 1];

        dst[i + 2]         = src[i + 0];

        dst[i + 0]         = x;

    }

}

static inline void yuvPlanartoyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,

                                     const uint8_t *vsrc, uint8_t *dst,

                                     int width, int height,

                                     int lumStride, int chromStride,

                                     int dstStride, int vertLumPerChroma)

{

    int y, i;

    const int chromWidth = width >> 1;

    for (y = 0; y < height; y++) {

#if HAVE_FAST_64BIT

        uint64_t *ldst = (uint64_t *)dst;

        const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;

        for (i = 0; i < (chromWidth & ~1); i += 2) {

            uint64_t k = yc[0] + (uc[0] << 8) +

                         (yc[1] << 16) + ((unsigned) vc[0] << 24);

            uint64_t l = yc[2] + (uc[1] << 8) +

                         (yc[3] << 16) + ((unsigned) vc[1] << 24);

            *ldst++ = k + (l << 32);

            yc     += 4;

            uc     += 2;

            vc     += 2;

        }

        ff_pack_yuv422_line(dst, ysrc, usrc, vsrc, chromWidth & ~1, chromWidth, 1);

#else

        int *idst = (int32_t *)dst;

        const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;

        for (i = 0; i < chromWidth; i++) {

#if HAVE_BIGENDIAN

            *idst++ = ((unsigned)yc[0] << 24) + (uc[0] << 16) +

                      (yc[1] <<  8) + (vc[0] <<  0);

#else

            *idst++ = yc[0] + (uc[0] << 8) +

                      (yc[1] << 16) + ((unsigned)vc[0] << 24);

#endif

            yc += 2;

            uc++;

            vc++;

        }

#endif

        if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {

            usrc += chromStride;

            vsrc += chromStride;

        }

        ysrc += lumStride;

        dst  += dstStride;

    }

}

static inline void yv12toyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,

                                const uint8_t *vsrc, uint8_t *dst,

                                int width, int height, int lumStride,

                                int chromStride, int dstStride)

{

    //FIXME interpolate chroma

    yuvPlanartoyuy2_c(ysrc, usrc, vsrc, dst, width, height, lumStride,

                      chromStride, dstStride, 2);

}

static inline void yuvPlanartouyvy_c(const uint8_t *ysrc, const uint8_t *usrc,

                                     const uint8_t *vsrc, uint8_t *dst,

                                     int width, int height,

                                     int lumStride, int chromStride,

                                     int dstStride, int vertLumPerChroma)

{

    int y, i;

    const int chromWidth = width >> 1;

    for (y = 0; y < height; y++) {

#if HAVE_FAST_64BIT

        uint64_t *ldst = (uint64_t *)dst;

        const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;

        for (i = 0; i < (chromWidth & ~1); i += 2) {

            uint64_t k = uc[0] + (yc[0] << 8) +

                         (vc[0] << 16) + ((unsigned) yc[1] << 24);

            uint64_t l = uc[1] + (yc[2] << 8) +

                         (vc[1] << 16) + ((unsigned) yc[3] << 24);

            *ldst++ = k + (l << 32);

            yc     += 4;

            uc     += 2;

            vc     += 2;

        }

        ff_pack_yuv422_line(dst, ysrc, usrc, vsrc, chromWidth & ~1, chromWidth, 0);

#else

        int *idst = (int32_t *)dst;

        const uint8_t *yc = ysrc, *uc = usrc, *vc = vsrc;

        for (i = 0; i < chromWidth; i++) {

#if HAVE_BIGENDIAN

            *idst++ = ((unsigned)uc[0] << 24) + (yc[0] << 16) +

                      (vc[0] <<  8) + (yc[1] <<  0);

#else

            *idst++ = uc[0] + (yc[0] << 8) +

                      (vc[0] << 16) + ((unsigned)yc[1] << 24);

#endif

            yc += 2;

            uc++;

            vc++;

        }

#endif

        if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {

            usrc += chromStride;

            vsrc += chromStride;

        }

        ysrc += lumStride;

        dst  += dstStride;

    }

}

static inline void yv12touyvy_c(const uint8_t *ysrc, const uint8_t *usrc,

                                const uint8_t *vsrc, uint8_t *dst,

                                int width, int height, int lumStride,

                                int chromStride, int dstStride)

{

    //FIXME interpolate chroma

    yuvPlanartouyvy_c(ysrc, usrc, vsrc, dst, width, height, lumStride,

                      chromStride, dstStride, 2);

}

static inline void yuv422ptouyvy_c(const uint8_t *ysrc, const uint8_t *usrc,

                                   const uint8_t *vsrc, uint8_t *dst,

                                   int width, int height, int lumStride,

                                   int chromStride, int dstStride)

{

    yuvPlanartouyvy_c(ysrc, usrc, vsrc, dst, width, height, lumStride,

                      chromStride, dstStride, 1);

}

static inline void yuv422ptoyuy2_c(const uint8_t *ysrc, const uint8_t *usrc,

                                   const uint8_t *vsrc, uint8_t *dst,

                                   int width, int height, int lumStride,

                                   int chromStride, int dstStride)

{

    yuvPlanartoyuy2_c(ysrc, usrc, vsrc, dst, width, height, lumStride,

                      chromStride, dstStride, 1);

}

static inline void planar2x_c(const uint8_t *src, uint8_t *dst, int srcWidth,

                              int srcHeight, int srcStride, int dstStride)

{

    int x, y;

    dst[0] = src[0];

    // first line

    for (x = 0; x < srcWidth - 1; x++) {

        dst[2 * x + 1] = (3 * src[x] + src[x + 1]) >> 2;

        dst[2 * x + 2] = (src[x] + 3 * src[x + 1]) >> 2;

    }

    dst[2 * srcWidth - 1] = src[srcWidth - 1];

    dst += dstStride;

    for (y = 1; y < srcHeight; y++) {

        const int mmxSize = 1;

        dst[0]         = (src[0] * 3 + src[srcStride]) >> 2;

        dst[dstStride] = (src[0] + 3 * src[srcStride]) >> 2;

        for (x = mmxSize - 1; x < srcWidth - 1; x++) {

            dst[2 * x + 1]             = (src[x + 0] * 3 + src[x + srcStride + 1]) >> 2;

            dst[2 * x + dstStride + 2] = (src[x + 0] + 3 * src[x + srcStride + 1]) >> 2;

            dst[2 * x + dstStride + 1] = (src[x + 1] + 3 * src[x + srcStride])     >> 2;

            dst[2 * x + 2]             = (src[x + 1] * 3 + src[x + srcStride])     >> 2;

        }

        dst[srcWidth * 2 - 1]             = (src[srcWidth - 1] * 3 + src[srcWidth - 1 + srcStride]) >> 2;

        dst[srcWidth * 2 - 1 + dstStride] = (src[srcWidth - 1] + 3 * src[srcWidth - 1 + srcStride]) >> 2;

        dst += dstStride * 2;

        src += srcStride;

    }

    // last line

    dst[0] = src[0];

    for (x = 0; x < srcWidth - 1; x++) {

        dst[2 * x + 1] = (src[x] * 3 + src[x + 1]) >> 2;

        dst[2 * x + 2] = (src[x] + 3 * src[x + 1]) >> 2;

    }

    dst[2 * srcWidth - 1] = src[srcWidth - 1];

}

/**

 * width should be a multiple of 2.

 * (If this is a problem for anyone then tell me, and I will fix it.)

 */

void ff_rgb24toyv12_c(const uint8_t *src, uint8_t *ydst, uint8_t *udst,

                   uint8_t *vdst, int width, int height, int lumStride,

                   int chromStride, int srcStride, const int32_t *rgb2yuv)

{

    int32_t ry = rgb2yuv[RY_IDX], gy = rgb2yuv[GY_IDX], by = rgb2yuv[BY_IDX];

    int32_t ru = rgb2yuv[RU_IDX], gu = rgb2yuv[GU_IDX], bu = rgb2yuv[BU_IDX];

    int32_t rv = rgb2yuv[RV_IDX], gv = rgb2yuv[GV_IDX], bv = rgb2yuv[BV_IDX];

    int y;

    const int chromWidth = width >> 1;

    const uint8_t *src1 = src;

    const uint8_t *src2 = src1 + srcStride;

    uint8_t *ydst1 = ydst;

    uint8_t *ydst2 = ydst + lumStride;

    for (y = 0; y < height; y += 2) {

        int i;

        if (y + 1 == height) {

            ydst2 = ydst1;

            src2  = src1;

        }

        for (i = 0; i < chromWidth; i++) {

            unsigned int b11 = src1[6 * i + 0];

            unsigned int g11 = src1[6 * i + 1];

            unsigned int r11 = src1[6 * i + 2];

            unsigned int b12 = src1[6 * i + 3];

            unsigned int g12 = src1[6 * i + 4];

            unsigned int r12 = src1[6 * i + 5];

            unsigned int b21 = src2[6 * i + 0];

            unsigned int g21 = src2[6 * i + 1];

            unsigned int r21 = src2[6 * i + 2];

            unsigned int b22 = src2[6 * i + 3];

            unsigned int g22 = src2[6 * i + 4];

            unsigned int r22 = src2[6 * i + 5];

            unsigned int Y11 = ((ry * r11 + gy * g11 + by * b11) >> RGB2YUV_SHIFT) + 16;

            unsigned int Y12 = ((ry * r12 + gy * g12 + by * b12) >> RGB2YUV_SHIFT) + 16;

            unsigned int Y21 = ((ry * r21 + gy * g21 + by * b21) >> RGB2YUV_SHIFT) + 16;

            unsigned int Y22 = ((ry * r22 + gy * g22 + by * b22) >> RGB2YUV_SHIFT) + 16;

            unsigned int bx = (b11 + b12 + b21 + b22) >> 2;

            unsigned int gx = (g11 + g12 + g21 + g22) >> 2;

            unsigned int rx = (r11 + r12 + r21 + r22) >> 2;

            unsigned int U  = ((ru * rx + gu * gx + bu * bx) >> RGB2YUV_SHIFT) + 128;

            unsigned int V  = ((rv * rx + gv * gx + bv * bx) >> RGB2YUV_SHIFT) + 128;

            ydst1[2 * i + 0] = Y11;

            ydst1[2 * i + 1] = Y12;

            ydst2[2 * i + 0] = Y21;

            ydst2[2 * i + 1] = Y22;

            udst[i]          = U;

            vdst[i]          = V;

        }

        src1  += srcStride * 2;

        src2  += srcStride * 2;

        ydst1 += lumStride * 2;

        ydst2 += lumStride * 2;

        udst  += chromStride;

        vdst  += chromStride;

    }

}

static void interleaveBytes_c(const uint8_t *src1, const uint8_t *src2,

                              uint8_t *dest, int width, int height,

                              int src1Stride, int src2Stride, int dstStride)

{

    int h;

    for (h = 0; h < height; h++) {

        int w;

        for (w = 0; w < width; w++) {

            dest[2 * w + 0] = src1[w];

            dest[2 * w + 1] = src2[w];

        }

        dest += dstStride;

        src1 += src1Stride;

        src2 += src2Stride;

    }

}

static void deinterleaveBytes_c(const uint8_t *src, uint8_t *dst1, uint8_t *dst2,

                                int width, int height, int srcStride,

                                int dst1Stride, int dst2Stride)

{

    int h;

    for (h = 0; h < height; h++) {

        int w;

        for (w = 0; w < width; w++) {

            dst1[w] = src[2 * w + 0];

            dst2[w] = src[2 * w + 1];

        }

        src  += srcStride;

        dst1 += dst1Stride;

        dst2 += dst2Stride;

    }

}

static void extract_even_c(const uint8_t *src, uint8_t *dst, int count)

{

    dst   +=  count;

    src   +=  count * 2;

    count  = -count;

    while (count < 0) {

        dst[count] = src[2 * count];

        count++;

    }

}

static void extract_even2_c(const uint8_t *src, uint8_t *dst0, uint8_t *dst1,

                            int count)

{

    dst0  +=  count;

    dst1  +=  count;

    src   +=  count * 4;

    count  = -count;

    while (count < 0) {

        dst0[count] = src[4 * count + 0];

        dst1[count] = src[4 * count + 2];

        count++;

    }

}

static void extract_even2avg_c(const uint8_t *src0, const uint8_t *src1,

                               uint8_t *dst0, uint8_t *dst1, int count)

{

    dst0  +=  count;

    dst1  +=  count;

    src0  +=  count * 4;

    src1  +=  count * 4;

    count  = -count;

    while (count < 0) {

        dst0[count] = (src0[4 * count + 0] + src1[4 * count + 0] + 1) >> 1;

        dst1[count] = (src0[4 * count + 2] + src1[4 * count + 2] + 1) >> 1;

        count++;

    }

}

static void extract_odd2_c(const uint8_t *src, uint8_t *dst0, uint8_t *dst1,

                           int count)

{

    dst0  +=  count;

    dst1  +=  count;

    src   +=  count * 4;

    count  = -count;

    src++;

    while (count < 0) {

        dst0[count] = src[4 * count + 0];

        dst1[count] = src[4 * count + 2];

        count++;

    }

}

static void extract_odd2avg_c(const uint8_t *src0, const uint8_t *src1,

                              uint8_t *dst0, uint8_t *dst1, int count)

{

    dst0  +=  count;

    dst1  +=  count;

    src0  +=  count * 4;

    src1  +=  count * 4;

    count  = -count;

    src0++;

    src1++;

    while (count < 0) {

        dst0[count] = (src0[4 * count + 0] + src1[4 * count + 0] + 1) >> 1;

        dst1[count] = (src0[4 * count + 2] + src1[4 * count + 2] + 1) >> 1;

        count++;

    }

}

static void yuyvtoyuv420_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,

                           const uint8_t *src, int width, int height,

                           int lumStride, int chromStride, int srcStride)

{

    int y;

    const int chromWidth = AV_CEIL_RSHIFT(width, 1);

    for (y = 0; y < height; y++) {

        extract_even_c(src, ydst, width);

        if (y & 1) {

            extract_odd2avg_c(src - srcStride, src, udst, vdst, chromWidth);

            udst += chromStride;

            vdst += chromStride;

        }

        src  += srcStride;

        ydst += lumStride;

    }

}

static void yuyvtoyuv422_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,

                           const uint8_t *src, int width, int height,

                           int lumStride, int chromStride, int srcStride)

{

    int y;

    const int chromWidth = AV_CEIL_RSHIFT(width, 1);

    for (y = 0; y < height; y++) {

        extract_even_c(src, ydst, width);

        extract_odd2_c(src, udst, vdst, chromWidth);

        src  += srcStride;

        ydst += lumStride;

        udst += chromStride;

        vdst += chromStride;

    }

}

static void uyvytoyuv420_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,

                           const uint8_t *src, int width, int height,

                           int lumStride, int chromStride, int srcStride)

{

    int y;

    const int chromWidth = AV_CEIL_RSHIFT(width, 1);

    for (y = 0; y < height; y++) {

        extract_even_c(src + 1, ydst, width);

        if (y & 1) {

            extract_even2avg_c(src - srcStride, src, udst, vdst, chromWidth);

            udst += chromStride;

            vdst += chromStride;

        }

        src  += srcStride;

        ydst += lumStride;

    }

}

static void uyvytoyuv422_c(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,

                           const uint8_t *src, int width, int height,

                           int lumStride, int chromStride, int srcStride)

{

    int y;

    const int chromWidth = AV_CEIL_RSHIFT(width, 1);

    for (y = 0; y < height; y++) {

        extract_even_c(src + 1, ydst, width);

        extract_even2_c(src, udst, vdst, chromWidth);

        src  += srcStride;

        ydst += lumStride;

        udst += chromStride;

        vdst += chromStride;

    }

}

static av_cold void rgb2rgb_init_c(void)

{

    rgb15to16          = rgb15to16_c;

    rgb15tobgr24       = rgb15tobgr24_c;

    rgb15to32          = rgb15to32_c;

    rgb16tobgr24       = rgb16tobgr24_c;

    rgb16to32          = rgb16to32_c;

    rgb16to15          = rgb16to15_c;

    rgb24tobgr16       = rgb24tobgr16_c;

    rgb24tobgr15       = rgb24tobgr15_c;

    rgb24tobgr32       = rgb24tobgr32_c;

    rgb32to16          = rgb32to16_c;

    rgb32to15          = rgb32to15_c;

    rgb32tobgr24       = rgb32tobgr24_c;

    rgb24to15          = rgb24to15_c;

    rgb24to16          = rgb24to16_c;

    rgb24tobgr24       = rgb24tobgr24_c;

#if HAVE_BIGENDIAN

    shuffle_bytes_0321 = shuffle_bytes_2103_c;

    shuffle_bytes_2103 = shuffle_bytes_0321_c;

#else

    shuffle_bytes_0321 = shuffle_bytes_0321_c;

    shuffle_bytes_2103 = shuffle_bytes_2103_c;

#endif

    shuffle_bytes_1230 = shuffle_bytes_1230_c;

    shuffle_bytes_3012 = shuffle_bytes_3012_c;

    shuffle_bytes_3210 = shuffle_bytes_3210_c;

    shuffle_bytes_3102 = shuffle_bytes_3102_c;

    shuffle_bytes_2013 = shuffle_bytes_2013_c;

    shuffle_bytes_2130 = shuffle_bytes_2130_c;

    shuffle_bytes_1203 = shuffle_bytes_1203_c;

    rgb32tobgr16       = rgb32tobgr16_c;

    rgb32tobgr15       = rgb32tobgr15_c;

    yv12toyuy2         = yv12toyuy2_c;

    yv12touyvy         = yv12touyvy_c;

    yuv422ptoyuy2      = yuv422ptoyuy2_c;

    yuv422ptouyvy      = yuv422ptouyvy_c;

    planar2x           = planar2x_c;

    ff_rgb24toyv12     = ff_rgb24toyv12_c;

    interleaveBytes    = interleaveBytes_c;

    deinterleaveBytes  = deinterleaveBytes_c;

    uyvytoyuv420       = uyvytoyuv420_c;

    uyvytoyuv422       = uyvytoyuv422_c;

    yuyvtoyuv420       = yuyvtoyuv420_c;

    yuyvtoyuv422       = yuyvtoyuv422_c;

}