text: /*
   * Copyright (C) 2001-2011 Michael Niedermayer <michaelni@gmx.at>
   *
   * 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 <inttypes.h>
  #include "config.h"
  #include "libswscale/swscale.h"
  #include "libswscale/swscale_internal.h"
  #include "libavutil/attributes.h"
  #include "libavutil/avassert.h"
  #include "libavutil/intreadwrite.h"
  #include "libavutil/x86/asm.h"
  #include "libavutil/x86/cpu.h"
  #include "libavutil/cpu.h"
  #include "libavutil/pixdesc.h"
  
  #if HAVE_INLINE_ASM
  
  #define DITHER1XBPP
  
  DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;
  DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;
  DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;
  DECLARE_ASM_CONST(8, uint64_t, w02)=       0x0002000200020002LL;
  
  const DECLARE_ALIGNED(8, uint64_t, ff_dither4)[2] = {
      0x0103010301030103LL,
      0x0200020002000200LL,};
  
  const DECLARE_ALIGNED(8, uint64_t, ff_dither8)[2] = {
      0x0602060206020602LL,
      0x0004000400040004LL,};
  
  DECLARE_ASM_CONST(8, uint64_t, b16Mask)=   0x001F001F001F001FLL;
  DECLARE_ASM_CONST(8, uint64_t, g16Mask)=   0x07E007E007E007E0LL;
  DECLARE_ASM_CONST(8, uint64_t, r16Mask)=   0xF800F800F800F800LL;
  DECLARE_ASM_CONST(8, uint64_t, b15Mask)=   0x001F001F001F001FLL;
  DECLARE_ASM_CONST(8, uint64_t, g15Mask)=   0x03E003E003E003E0LL;
  DECLARE_ASM_CONST(8, uint64_t, r15Mask)=   0x7C007C007C007C00LL;
  
  DECLARE_ALIGNED(8, const uint64_t, ff_M24A)         = 0x00FF0000FF0000FFLL;
  DECLARE_ALIGNED(8, const uint64_t, ff_M24B)         = 0xFF0000FF0000FF00LL;
  DECLARE_ALIGNED(8, const uint64_t, ff_M24C)         = 0x0000FF0000FF0000LL;
  
  DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YOffset)  = 0x1010101010101010ULL;
  DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;
  DECLARE_ALIGNED(8, const uint64_t, ff_w1111)        = 0x0001000100010001ULL;
  
  
  //MMX versions
  #if HAVE_MMX_INLINE
  #undef RENAME
  #define COMPILE_TEMPLATE_MMXEXT 0
  #define RENAME(a) a ## _mmx
  #include "swscale_template.c"
  #endif
  
  // MMXEXT versions
  #if HAVE_MMXEXT_INLINE
  #undef RENAME
  #undef COMPILE_TEMPLATE_MMXEXT
  #define COMPILE_TEMPLATE_MMXEXT 1
  #define RENAME(a) a ## _mmxext
  #include "swscale_template.c"
  #endif
  
  void ff_updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
                             int lastInLumBuf, int lastInChrBuf)
  {
      const int dstH= c->dstH;
      const int flags= c->flags;
  #ifdef NEW_FILTER
      SwsPlane *lumPlane = &c->slice[c->numSlice-2].plane[0];
      SwsPlane *chrUPlane = &c->slice[c->numSlice-2].plane[1];
      SwsPlane *alpPlane = &c->slice[c->numSlice-2].plane[3];
  #else
      int16_t **lumPixBuf= c->lumPixBuf;
      int16_t **chrUPixBuf= c->chrUPixBuf;
      int16_t **alpPixBuf= c->alpPixBuf;
      const int vLumBufSize= c->vLumBufSize;
      const int vChrBufSize= c->vChrBufSize;
  #endif
      int hasAlpha = c->alpPixBuf != NULL;
      int32_t *vLumFilterPos= c->vLumFilterPos;
      int32_t *vChrFilterPos= c->vChrFilterPos;
      int16_t *vLumFilter= c->vLumFilter;
      int16_t *vChrFilter= c->vChrFilter;
      int32_t *lumMmxFilter= c->lumMmxFilter;
      int32_t *chrMmxFilter= c->chrMmxFilter;
      int32_t av_unused *alpMmxFilter= c->alpMmxFilter;
      const int vLumFilterSize= c->vLumFilterSize;
      const int vChrFilterSize= c->vChrFilterSize;
      const int chrDstY= dstY>>c->chrDstVSubSample;
      const int firstLumSrcY= vLumFilterPos[dstY]; //First line needed as input
      const int firstChrSrcY= vChrFilterPos[chrDstY]; //First line needed as input
  
      c->blueDither= ff_dither8[dstY&1];
      if (c->dstFormat == AV_PIX_FMT_RGB555 || c->dstFormat == AV_PIX_FMT_BGR555)
          c->greenDither= ff_dither8[dstY&1];
      else
          c->greenDither= ff_dither4[dstY&1];
      c->redDither= ff_dither8[(dstY+1)&1];
      if (dstY < dstH - 2) {
  #ifdef NEW_FILTER
          const int16_t **lumSrcPtr  = (const int16_t **)(void*) lumPlane->line + firstLumSrcY - lumPlane->sliceY;
          const int16_t **chrUSrcPtr = (const int16_t **)(void*) chrUPlane->line + firstChrSrcY - chrUPlane->sliceY;
          const int16_t **alpSrcPtr  = (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) ? (const int16_t **)(void*) alpPlane->line + firstLumSrcY - alpPlane->sliceY : NULL;
  #else
          const int16_t **lumSrcPtr= (const int16_t **)(void*) lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
          const int16_t **chrUSrcPtr= (const int16_t **)(void*) chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
          const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **)(void*) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
  #endif
          int i;
          if (firstLumSrcY < 0 || firstLumSrcY + vLumFilterSize > c->srcH) {
  #ifdef NEW_FILTER
              const int16_t **tmpY = (const int16_t **) lumPlane->tmp;
  #else
              const int16_t **tmpY = (const int16_t **) lumPixBuf + 2 * vLumBufSize;
  #endif
              int neg = -firstLumSrcY, i, end = FFMIN(c->srcH - firstLumSrcY, vLumFilterSize);
              for (i = 0; i < neg;            i++)
                  tmpY[i] = lumSrcPtr[neg];
              for (     ; i < end;            i++)
                  tmpY[i] = lumSrcPtr[i];
              for (     ; i < vLumFilterSize; i++)
                  tmpY[i] = tmpY[i-1];
              lumSrcPtr = tmpY;
  
              if (alpSrcPtr) {
  #ifdef NEW_FILTER
                  const int16_t **tmpA = (const int16_t **) alpPlane->tmp;
  #else
                  const int16_t **tmpA = (const int16_t **) alpPixBuf + 2 * vLumBufSize;
  #endif
                  for (i = 0; i < neg;            i++)
                      tmpA[i] = alpSrcPtr[neg];
                  for (     ; i < end;            i++)
                      tmpA[i] = alpSrcPtr[i];
                  for (     ; i < vLumFilterSize; i++)
                      tmpA[i] = tmpA[i - 1];
                  alpSrcPtr = tmpA;
              }
          }
          if (firstChrSrcY < 0 || firstChrSrcY + vChrFilterSize > c->chrSrcH) {
  #ifdef NEW_FILTER
              const int16_t **tmpU = (const int16_t **) chrUPlane->tmp;
  #else
              const int16_t **tmpU = (const int16_t **) chrUPixBuf + 2 * vChrBufSize;
  #endif
              int neg = -firstChrSrcY, i, end = FFMIN(c->chrSrcH - firstChrSrcY, vChrFilterSize);
              for (i = 0; i < neg;            i++) {
                  tmpU[i] = chrUSrcPtr[neg];
              }
              for (     ; i < end;            i++) {
                  tmpU[i] = chrUSrcPtr[i];
              }
              for (     ; i < vChrFilterSize; i++) {
                  tmpU[i] = tmpU[i - 1];
              }
              chrUSrcPtr = tmpU;
          }
  
          if (flags & SWS_ACCURATE_RND) {
              int s= APCK_SIZE / 8;
              for (i=0; i<vLumFilterSize; i+=2) {
                  *(const void**)&lumMmxFilter[s*i              ]= lumSrcPtr[i  ];
                  *(const void**)&lumMmxFilter[s*i+APCK_PTR2/4  ]= lumSrcPtr[i+(vLumFilterSize>1)];
                  lumMmxFilter[s*i+APCK_COEF/4  ]=
                  lumMmxFilter[s*i+APCK_COEF/4+1]= vLumFilter[dstY*vLumFilterSize + i    ]
                  + (vLumFilterSize>1 ? vLumFilter[dstY*vLumFilterSize + i + 1]<<16 : 0);
                  if (CONFIG_SWSCALE_ALPHA && hasAlpha) {
                      *(const void**)&alpMmxFilter[s*i              ]= alpSrcPtr[i  ];
                      *(const void**)&alpMmxFilter[s*i+APCK_PTR2/4  ]= alpSrcPtr[i+(vLumFilterSize>1)];
                      alpMmxFilter[s*i+APCK_COEF/4  ]=
                      alpMmxFilter[s*i+APCK_COEF/4+1]= lumMmxFilter[s*i+APCK_COEF/4  ];
                  }
              }
              for (i=0; i<vChrFilterSize; i+=2) {
                  *(const void**)&chrMmxFilter[s*i              ]= chrUSrcPtr[i  ];
                  *(const void**)&chrMmxFilter[s*i+APCK_PTR2/4  ]= chrUSrcPtr[i+(vChrFilterSize>1)];
                  chrMmxFilter[s*i+APCK_COEF/4  ]=
                  chrMmxFilter[s*i+APCK_COEF/4+1]= vChrFilter[chrDstY*vChrFilterSize + i    ]
                  + (vChrFilterSize>1 ? vChrFilter[chrDstY*vChrFilterSize + i + 1]<<16 : 0);
              }
          } else {
              for (i=0; i<vLumFilterSize; i++) {
                  *(const void**)&lumMmxFilter[4*i+0]= lumSrcPtr[i];
                  lumMmxFilter[4*i+2]=
                  lumMmxFilter[4*i+3]=
                  ((uint16_t)vLumFilter[dstY*vLumFilterSize + i])*0x10001U;
                  if (CONFIG_SWSCALE_ALPHA && hasAlpha) {
                      *(const void**)&alpMmxFilter[4*i+0]= alpSrcPtr[i];
                      alpMmxFilter[4*i+2]=
                      alpMmxFilter[4*i+3]= lumMmxFilter[4*i+2];
                  }
              }
              for (i=0; i<vChrFilterSize; i++) {
                  *(const void**)&chrMmxFilter[4*i+0]= chrUSrcPtr[i];
                  chrMmxFilter[4*i+2]=
                  chrMmxFilter[4*i+3]=
                  ((uint16_t)vChrFilter[chrDstY*vChrFilterSize + i])*0x10001U;
              }
          }
      }
  }
  
  #if HAVE_MMXEXT
  static void yuv2yuvX_sse3(const int16_t *filter, int filterSize,
                             const int16_t **src, uint8_t *dest, int dstW,
                             const uint8_t *dither, int offset)
  {
      if(((uintptr_t)dest) & 15){
          yuv2yuvX_mmxext(filter, filterSize, src, dest, dstW, dither, offset);
          return;
      }
      filterSize--;
  #define MAIN_FUNCTION \
          "pxor       %%xmm0, %%xmm0 \n\t" \
          "punpcklbw  %%xmm0, %%xmm3 \n\t" \
          "movd           %4, %%xmm1 \n\t" \
          "punpcklwd  %%xmm1, %%xmm1 \n\t" \
          "punpckldq  %%xmm1, %%xmm1 \n\t" \
          "punpcklqdq %%xmm1, %%xmm1 \n\t" \
          "psllw          $3, %%xmm1 \n\t" \
          "paddw      %%xmm1, %%xmm3 \n\t" \
          "psraw          $4, %%xmm3 \n\t" \
          "movdqa     %%xmm3, %%xmm4 \n\t" \
          "movdqa     %%xmm3, %%xmm7 \n\t" \
          "movl           %3, %%ecx  \n\t" \
          "mov                                 %0, %%"REG_d"  \n\t"\
          "mov                        (%%"REG_d"), %%"REG_S"  \n\t"\
          ".p2align                             4             \n\t" /* FIXME Unroll? */\
          "1:                                                 \n\t"\
          "movddup                  8(%%"REG_d"), %%xmm0      \n\t" /* filterCoeff */\
          "movdqa              (%%"REG_S", %%"REG_c", 2), %%xmm2      \n\t" /* srcData */\
          "movdqa            16(%%"REG_S", %%"REG_c", 2), %%xmm5      \n\t" /* srcData */\
          "add                                $16, %%"REG_d"  \n\t"\
          "mov                        (%%"REG_d"), %%"REG_S"  \n\t"\
          "test                         %%"REG_S", %%"REG_S"  \n\t"\
          "pmulhw                           %%xmm0, %%xmm2      \n\t"\
          "pmulhw                           %%xmm0, %%xmm5      \n\t"\
          "paddw                            %%xmm2, %%xmm3      \n\t"\
          "paddw                            %%xmm5, %%xmm4      \n\t"\
          " jnz                                1b             \n\t"\
          "psraw                               $3, %%xmm3      \n\t"\
          "psraw                               $3, %%xmm4      \n\t"\
          "packuswb                         %%xmm4, %%xmm3      \n\t"\
          "movntdq                          %%xmm3, (%1, %%"REG_c")\n\t"\
          "add                         $16, %%"REG_c"         \n\t"\
          "cmp                          %2, %%"REG_c"         \n\t"\
          "movdqa                   %%xmm7, %%xmm3            \n\t" \
          "movdqa                   %%xmm7, %%xmm4            \n\t" \
          "mov                                 %0, %%"REG_d"  \n\t"\
          "mov                        (%%"REG_d"), %%"REG_S"  \n\t"\
          "jb                                  1b             \n\t"
  
      if (offset) {
          __asm__ volatile(
              "movq          %5, %%xmm3  \n\t"
              "movdqa    %%xmm3, %%xmm4  \n\t"
              "psrlq        $24, %%xmm3  \n\t"
              "psllq        $40, %%xmm4  \n\t"
              "por       %%xmm4, %%xmm3  \n\t"
              MAIN_FUNCTION
                :: "g" (filter),
                "r" (dest-offset), "g" ((x86_reg)(dstW+offset)), "m" (offset),
                "m"(filterSize), "m"(((uint64_t *) dither)[0])
                : XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" , "%xmm4" , "%xmm5" , "%xmm7" ,)
                  "%"REG_d, "%"REG_S, "%"REG_c
                );
      } else {
          __asm__ volatile(
              "movq          %5, %%xmm3   \n\t"
              MAIN_FUNCTION
                :: "g" (filter),
                "r" (dest-offset), "g" ((x86_reg)(dstW+offset)), "m" (offset),
                "m"(filterSize), "m"(((uint64_t *) dither)[0])
                : XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" , "%xmm4" , "%xmm5" , "%xmm7" ,)
                  "%"REG_d, "%"REG_S, "%"REG_c
                );
      }
  }
  #endif
  
  #endif /* HAVE_INLINE_ASM */
  
  #define SCALE_FUNC(filter_n, from_bpc, to_bpc, opt) \
  void ff_hscale ## from_bpc ## to ## to_bpc ## _ ## filter_n ## _ ## opt( \
                                                  SwsContext *c, int16_t *data, \
                                                  int dstW, const uint8_t *src, \
                                                  const int16_t *filter, \
                                                  const int32_t *filterPos, int filterSize)
  
  #define SCALE_FUNCS(filter_n, opt) \
      SCALE_FUNC(filter_n,  8, 15, opt); \
      SCALE_FUNC(filter_n,  9, 15, opt); \
      SCALE_FUNC(filter_n, 10, 15, opt); \
      SCALE_FUNC(filter_n, 12, 15, opt); \
      SCALE_FUNC(filter_n, 14, 15, opt); \
      SCALE_FUNC(filter_n, 16, 15, opt); \
      SCALE_FUNC(filter_n,  8, 19, opt); \
      SCALE_FUNC(filter_n,  9, 19, opt); \
      SCALE_FUNC(filter_n, 10, 19, opt); \
      SCALE_FUNC(filter_n, 12, 19, opt); \
      SCALE_FUNC(filter_n, 14, 19, opt); \
      SCALE_FUNC(filter_n, 16, 19, opt)
  
  #define SCALE_FUNCS_MMX(opt) \
      SCALE_FUNCS(4, opt); \
      SCALE_FUNCS(8, opt); \
      SCALE_FUNCS(X, opt)
  
  #define SCALE_FUNCS_SSE(opt) \
      SCALE_FUNCS(4, opt); \
      SCALE_FUNCS(8, opt); \
      SCALE_FUNCS(X4, opt); \
      SCALE_FUNCS(X8, opt)
  
  #if ARCH_X86_32
  SCALE_FUNCS_MMX(mmx);
  #endif
  SCALE_FUNCS_SSE(sse2);
  SCALE_FUNCS_SSE(ssse3);
  SCALE_FUNCS_SSE(sse4);
  
  #define VSCALEX_FUNC(size, opt) \
  void ff_yuv2planeX_ ## size ## _ ## opt(const int16_t *filter, int filterSize, \
                                          const int16_t **src, uint8_t *dest, int dstW, \
                                          const uint8_t *dither, int offset)
  #define VSCALEX_FUNCS(opt) \
      VSCALEX_FUNC(8,  opt); \
      VSCALEX_FUNC(9,  opt); \
      VSCALEX_FUNC(10, opt)
  
  #if ARCH_X86_32
  VSCALEX_FUNCS(mmxext);
  #endif
  VSCALEX_FUNCS(sse2);
  VSCALEX_FUNCS(sse4);
  VSCALEX_FUNC(16, sse4);
  VSCALEX_FUNCS(avx);
  
  #define VSCALE_FUNC(size, opt) \
  void ff_yuv2plane1_ ## size ## _ ## opt(const int16_t *src, uint8_t *dst, int dstW, \
                                          const uint8_t *dither, int offset)
  #define VSCALE_FUNCS(opt1, opt2) \
      VSCALE_FUNC(8,  opt1); \
      VSCALE_FUNC(9,  opt2); \
      VSCALE_FUNC(10, opt2); \
      VSCALE_FUNC(16, opt1)
  
  #if ARCH_X86_32
  VSCALE_FUNCS(mmx, mmxext);
  #endif
  VSCALE_FUNCS(sse2, sse2);
  VSCALE_FUNC(16, sse4);
  VSCALE_FUNCS(avx, avx);
  
  #define INPUT_Y_FUNC(fmt, opt) \
  void ff_ ## fmt ## ToY_  ## opt(uint8_t *dst, const uint8_t *src, \
                                  const uint8_t *unused1, const uint8_t *unused2, \
                                  int w, uint32_t *unused)
  #define INPUT_UV_FUNC(fmt, opt) \
  void ff_ ## fmt ## ToUV_ ## opt(uint8_t *dstU, uint8_t *dstV, \
                                  const uint8_t *unused0, \
                                  const uint8_t *src1, \
                                  const uint8_t *src2, \
                                  int w, uint32_t *unused)
  #define INPUT_FUNC(fmt, opt) \
      INPUT_Y_FUNC(fmt, opt); \
      INPUT_UV_FUNC(fmt, opt)
  #define INPUT_FUNCS(opt) \
      INPUT_FUNC(uyvy, opt); \
      INPUT_FUNC(yuyv, opt); \
      INPUT_UV_FUNC(nv12, opt); \
      INPUT_UV_FUNC(nv21, opt); \
      INPUT_FUNC(rgba, opt); \
      INPUT_FUNC(bgra, opt); \
      INPUT_FUNC(argb, opt); \
      INPUT_FUNC(abgr, opt); \
      INPUT_FUNC(rgb24, opt); \
      INPUT_FUNC(bgr24, opt)
  
  #if ARCH_X86_32
  INPUT_FUNCS(mmx);
  #endif
  INPUT_FUNCS(sse2);
  INPUT_FUNCS(ssse3);
  INPUT_FUNCS(avx);
  
  av_cold void ff_sws_init_swscale_x86(SwsContext *c)
  {
      int cpu_flags = av_get_cpu_flags();
  
  #if HAVE_MMX_INLINE
      if (INLINE_MMX(cpu_flags))
          sws_init_swscale_mmx(c);
  #endif
  #if HAVE_MMXEXT_INLINE
      if (INLINE_MMXEXT(cpu_flags))
          sws_init_swscale_mmxext(c);
      if (cpu_flags & AV_CPU_FLAG_SSE3){
          if(c->use_mmx_vfilter && !(c->flags & SWS_ACCURATE_RND))
              c->yuv2planeX = yuv2yuvX_sse3;
      }
  #endif
  
  #define ASSIGN_SCALE_FUNC2(hscalefn, filtersize, opt1, opt2) do { \
      if (c->srcBpc == 8) { \
          hscalefn = c->dstBpc <= 14 ? ff_hscale8to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale8to19_ ## filtersize ## _ ## opt1; \
      } else if (c->srcBpc == 9) { \
          hscalefn = c->dstBpc <= 14 ? ff_hscale9to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale9to19_ ## filtersize ## _ ## opt1; \
      } else if (c->srcBpc == 10) { \
          hscalefn = c->dstBpc <= 14 ? ff_hscale10to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale10to19_ ## filtersize ## _ ## opt1; \
      } else if (c->srcBpc == 12) { \
          hscalefn = c->dstBpc <= 14 ? ff_hscale12to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale12to19_ ## filtersize ## _ ## opt1; \
      } else if (c->srcBpc == 14 || ((c->srcFormat==AV_PIX_FMT_PAL8||isAnyRGB(c->srcFormat)) && av_pix_fmt_desc_get(c->srcFormat)->comp[0].depth<16)) { \
          hscalefn = c->dstBpc <= 14 ? ff_hscale14to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale14to19_ ## filtersize ## _ ## opt1; \
      } else { /* c->srcBpc == 16 */ \
          av_assert0(c->srcBpc == 16);\
          hscalefn = c->dstBpc <= 14 ? ff_hscale16to15_ ## filtersize ## _ ## opt2 : \
                                       ff_hscale16to19_ ## filtersize ## _ ## opt1; \
      } \
  } while (0)
  #define ASSIGN_MMX_SCALE_FUNC(hscalefn, filtersize, opt1, opt2) \
      switch (filtersize) { \
      case 4:  ASSIGN_SCALE_FUNC2(hscalefn, 4, opt1, opt2); break; \
      case 8:  ASSIGN_SCALE_FUNC2(hscalefn, 8, opt1, opt2); break; \
      default: ASSIGN_SCALE_FUNC2(hscalefn, X, opt1, opt2); break; \
      }
  #define ASSIGN_VSCALEX_FUNC(vscalefn, opt, do_16_case, condition_8bit) \
  switch(c->dstBpc){ \
      case 16:                          do_16_case;                          break; \
      case 10: if (!isBE(c->dstFormat)) vscalefn = ff_yuv2planeX_10_ ## opt; break; \
      case 9:  if (!isBE(c->dstFormat)) vscalefn = ff_yuv2planeX_9_  ## opt; break; \
      case 8: if ((condition_8bit) && !c->use_mmx_vfilter) vscalefn = ff_yuv2planeX_8_  ## opt; break; \
      }
  #define ASSIGN_VSCALE_FUNC(vscalefn, opt1, opt2, opt2chk) \
      switch(c->dstBpc){ \
      case 16: if (!isBE(c->dstFormat))            vscalefn = ff_yuv2plane1_16_ ## opt1; break; \
      case 10: if (!isBE(c->dstFormat) && opt2chk) vscalefn = ff_yuv2plane1_10_ ## opt2; break; \
      case 9:  if (!isBE(c->dstFormat) && opt2chk) vscalefn = ff_yuv2plane1_9_  ## opt2;  break; \
      case 8:                                      vscalefn = ff_yuv2plane1_8_  ## opt1;  break; \
      default: av_assert0(c->dstBpc>8); \
      }
  #define case_rgb(x, X, opt) \
          case AV_PIX_FMT_ ## X: \
              c->lumToYV12 = ff_ ## x ## ToY_ ## opt; \
              if (!c->chrSrcHSubSample) \
                  c->chrToYV12 = ff_ ## x ## ToUV_ ## opt; \
              break
  #if ARCH_X86_32
      if (EXTERNAL_MMX(cpu_flags)) {
          ASSIGN_MMX_SCALE_FUNC(c->hyScale, c->hLumFilterSize, mmx, mmx);
          ASSIGN_MMX_SCALE_FUNC(c->hcScale, c->hChrFilterSize, mmx, mmx);
          ASSIGN_VSCALE_FUNC(c->yuv2plane1, mmx, mmxext, cpu_flags & AV_CPU_FLAG_MMXEXT);
  
          switch (c->srcFormat) {
          case AV_PIX_FMT_YA8:
              c->lumToYV12 = ff_yuyvToY_mmx;
              if (c->alpPixBuf)
                  c->alpToYV12 = ff_uyvyToY_mmx;
              break;
          case AV_PIX_FMT_YUYV422:
              c->lumToYV12 = ff_yuyvToY_mmx;
              c->chrToYV12 = ff_yuyvToUV_mmx;
              break;
          case AV_PIX_FMT_UYVY422:
              c->lumToYV12 = ff_uyvyToY_mmx;
              c->chrToYV12 = ff_uyvyToUV_mmx;
              break;
          case AV_PIX_FMT_NV12:
              c->chrToYV12 = ff_nv12ToUV_mmx;
              break;
          case AV_PIX_FMT_NV21:
              c->chrToYV12 = ff_nv21ToUV_mmx;
              break;
          case_rgb(rgb24, RGB24, mmx);
          case_rgb(bgr24, BGR24, mmx);
          case_rgb(bgra,  BGRA,  mmx);
          case_rgb(rgba,  RGBA,  mmx);
          case_rgb(abgr,  ABGR,  mmx);
          case_rgb(argb,  ARGB,  mmx);
          default:
              break;
          }
      }
      if (EXTERNAL_MMXEXT(cpu_flags)) {
          ASSIGN_VSCALEX_FUNC(c->yuv2planeX, mmxext, , 1);
      }
  #endif /* ARCH_X86_32 */
  #define ASSIGN_SSE_SCALE_FUNC(hscalefn, filtersize, opt1, opt2) \
      switch (filtersize) { \
      case 4:  ASSIGN_SCALE_FUNC2(hscalefn, 4, opt1, opt2); break; \
      case 8:  ASSIGN_SCALE_FUNC2(hscalefn, 8, opt1, opt2); break; \
      default: if (filtersize & 4) ASSIGN_SCALE_FUNC2(hscalefn, X4, opt1, opt2); \
               else                ASSIGN_SCALE_FUNC2(hscalefn, X8, opt1, opt2); \
               break; \
      }
      if (EXTERNAL_SSE2(cpu_flags)) {
          ASSIGN_SSE_SCALE_FUNC(c->hyScale, c->hLumFilterSize, sse2, sse2);
          ASSIGN_SSE_SCALE_FUNC(c->hcScale, c->hChrFilterSize, sse2, sse2);
          ASSIGN_VSCALEX_FUNC(c->yuv2planeX, sse2, ,
                              HAVE_ALIGNED_STACK || ARCH_X86_64);
          ASSIGN_VSCALE_FUNC(c->yuv2plane1, sse2, sse2, 1);
  
          switch (c->srcFormat) {
          case AV_PIX_FMT_YA8:
              c->lumToYV12 = ff_yuyvToY_sse2;
              if (c->alpPixBuf)
                  c->alpToYV12 = ff_uyvyToY_sse2;
              break;
          case AV_PIX_FMT_YUYV422:
              c->lumToYV12 = ff_yuyvToY_sse2;
              c->chrToYV12 = ff_yuyvToUV_sse2;
              break;
          case AV_PIX_FMT_UYVY422:
              c->lumToYV12 = ff_uyvyToY_sse2;
              c->chrToYV12 = ff_uyvyToUV_sse2;
              break;
          case AV_PIX_FMT_NV12:
              c->chrToYV12 = ff_nv12ToUV_sse2;
              break;
          case AV_PIX_FMT_NV21:
              c->chrToYV12 = ff_nv21ToUV_sse2;
              break;
          case_rgb(rgb24, RGB24, sse2);
          case_rgb(bgr24, BGR24, sse2);
          case_rgb(bgra,  BGRA,  sse2);
          case_rgb(rgba,  RGBA,  sse2);
          case_rgb(abgr,  ABGR,  sse2);
          case_rgb(argb,  ARGB,  sse2);
          default:
              break;
          }
      }
      if (EXTERNAL_SSSE3(cpu_flags)) {
          ASSIGN_SSE_SCALE_FUNC(c->hyScale, c->hLumFilterSize, ssse3, ssse3);
          ASSIGN_SSE_SCALE_FUNC(c->hcScale, c->hChrFilterSize, ssse3, ssse3);
          switch (c->srcFormat) {
          case_rgb(rgb24, RGB24, ssse3);
          case_rgb(bgr24, BGR24, ssse3);
          default:
              break;
          }
      }
      if (EXTERNAL_SSE4(cpu_flags)) {
          /* Xto15 don't need special sse4 functions */
          ASSIGN_SSE_SCALE_FUNC(c->hyScale, c->hLumFilterSize, sse4, ssse3);
          ASSIGN_SSE_SCALE_FUNC(c->hcScale, c->hChrFilterSize, sse4, ssse3);
          ASSIGN_VSCALEX_FUNC(c->yuv2planeX, sse4,
                              if (!isBE(c->dstFormat)) c->yuv2planeX = ff_yuv2planeX_16_sse4,
                              HAVE_ALIGNED_STACK || ARCH_X86_64);
          if (c->dstBpc == 16 && !isBE(c->dstFormat))
              c->yuv2plane1 = ff_yuv2plane1_16_sse4;
      }
  
      if (EXTERNAL_AVX(cpu_flags)) {
          ASSIGN_VSCALEX_FUNC(c->yuv2planeX, avx, ,
                              HAVE_ALIGNED_STACK || ARCH_X86_64);
          ASSIGN_VSCALE_FUNC(c->yuv2plane1, avx, avx, 1);
  
          switch (c->srcFormat) {
          case AV_PIX_FMT_YUYV422:
              c->chrToYV12 = ff_yuyvToUV_avx;
              break;
          case AV_PIX_FMT_UYVY422:
              c->chrToYV12 = ff_uyvyToUV_avx;
              break;
          case AV_PIX_FMT_NV12:
              c->chrToYV12 = ff_nv12ToUV_avx;
              break;
          case AV_PIX_FMT_NV21:
              c->chrToYV12 = ff_nv21ToUV_avx;
              break;
          case_rgb(rgb24, RGB24, avx);
          case_rgb(bgr24, BGR24, avx);
          case_rgb(bgra,  BGRA,  avx);
          case_rgb(rgba,  RGBA,  avx);
          case_rgb(abgr,  ABGR,  avx);
          case_rgb(argb,  ARGB,  avx);
          default:
              break;
          }
      }
  }
  