text: /*
   * Copyright (C) 2001-2003 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
   */
  
  #ifndef SWSCALE_SWSCALE_INTERNAL_H
  #define SWSCALE_SWSCALE_INTERNAL_H
  
  #include "config.h"
  
  #if HAVE_ALTIVEC_H
  #include <altivec.h>
  #endif
  
  #include "libavutil/avutil.h"
  
  #define STR(s)         AV_TOSTRING(s) //AV_STRINGIFY is too long
  
  #define MAX_FILTER_SIZE 256
  
  #define VOFW 2048
  #define VOF  (VOFW*2)
  
  #ifdef WORDS_BIGENDIAN
  #define ALT32_CORR (-1)
  #else
  #define ALT32_CORR   1
  #endif
  
  #if ARCH_X86_64
  #   define APCK_PTR2 8
  #   define APCK_COEF 16
  #   define APCK_SIZE 24
  #else
  #   define APCK_PTR2 4
  #   define APCK_COEF 8
  #   define APCK_SIZE 16
  #endif
  
  struct SwsContext;
  
  typedef int (*SwsFunc)(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
               int srcSliceH, uint8_t* dst[], int dstStride[]);
  
  /* This struct should be aligned on at least a 32-byte boundary. */
  typedef struct SwsContext{
      /**
       * info on struct for av_log
       */
      const AVClass *av_class;
  
      /**
       * Note that src, dst, srcStride, dstStride will be copied in the
       * sws_scale() wrapper so they can be freely modified here.
       */
      SwsFunc swScale;
      int srcW, srcH, dstH;
      int chrSrcW, chrSrcH, chrDstW, chrDstH;
      int lumXInc, chrXInc;
      int lumYInc, chrYInc;
      enum PixelFormat dstFormat, srcFormat;  ///< format 4:2:0 type is always YV12
      int origDstFormat, origSrcFormat;       ///< format
      int chrSrcHSubSample, chrSrcVSubSample;
      int chrIntHSubSample, chrIntVSubSample;
      int chrDstHSubSample, chrDstVSubSample;
      int vChrDrop;
      int sliceDir;
      double param[2];
  
      uint32_t pal_yuv[256];
      uint32_t pal_rgb[256];
  
      int16_t **lumPixBuf;
      int16_t **chrPixBuf;
      int16_t *hLumFilter;
      int16_t *hLumFilterPos;
      int16_t *hChrFilter;
      int16_t *hChrFilterPos;
      int16_t *vLumFilter;
      int16_t *vLumFilterPos;
      int16_t *vChrFilter;
      int16_t *vChrFilterPos;
  
      uint8_t formatConvBuffer[VOF]; //FIXME dynamic allocation, but we have to change a lot of code for this to be useful
  
      int hLumFilterSize;
      int hChrFilterSize;
      int vLumFilterSize;
      int vChrFilterSize;
      int vLumBufSize;
      int vChrBufSize;
  
      uint8_t *funnyYCode;
      uint8_t *funnyUVCode;
      int32_t *lumMmx2FilterPos;
      int32_t *chrMmx2FilterPos;
      int16_t *lumMmx2Filter;
      int16_t *chrMmx2Filter;
  
      int canMMX2BeUsed;
  
      int lastInLumBuf;
      int lastInChrBuf;
      int lumBufIndex;
      int chrBufIndex;
      int dstY;
      int flags;
      void * yuvTable;            // pointer to the yuv->rgb table start so it can be freed()
      uint8_t * table_rV[256];
      uint8_t * table_gU[256];
      int    table_gV[256];
      uint8_t * table_bU[256];
  
      //Colorspace stuff
      int contrast, brightness, saturation;    // for sws_getColorspaceDetails
      int srcColorspaceTable[4];
      int dstColorspaceTable[4];
      int srcRange, dstRange;
      int yuv2rgb_y_offset;
      int yuv2rgb_y_coeff;
      int yuv2rgb_v2r_coeff;
      int yuv2rgb_v2g_coeff;
      int yuv2rgb_u2g_coeff;
      int yuv2rgb_u2b_coeff;
  
  #define RED_DITHER            "0*8"
  #define GREEN_DITHER          "1*8"
  #define BLUE_DITHER           "2*8"
  #define Y_COEFF               "3*8"
  #define VR_COEFF              "4*8"
  #define UB_COEFF              "5*8"
  #define VG_COEFF              "6*8"
  #define UG_COEFF              "7*8"
  #define Y_OFFSET              "8*8"
  #define U_OFFSET              "9*8"
  #define V_OFFSET              "10*8"
  #define LUM_MMX_FILTER_OFFSET "11*8"
  #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
  #define DSTW_OFFSET           "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
  #define ESP_OFFSET            "11*8+4*4*256*2+8"
  #define VROUNDER_OFFSET       "11*8+4*4*256*2+16"
  #define U_TEMP                "11*8+4*4*256*2+24"
  #define V_TEMP                "11*8+4*4*256*2+32"
  
      uint64_t redDither   __attribute__((aligned(8)));
      uint64_t greenDither __attribute__((aligned(8)));
      uint64_t blueDither  __attribute__((aligned(8)));
  
      uint64_t yCoeff      __attribute__((aligned(8)));
      uint64_t vrCoeff     __attribute__((aligned(8)));
      uint64_t ubCoeff     __attribute__((aligned(8)));
      uint64_t vgCoeff     __attribute__((aligned(8)));
      uint64_t ugCoeff     __attribute__((aligned(8)));
      uint64_t yOffset     __attribute__((aligned(8)));
      uint64_t uOffset     __attribute__((aligned(8)));
      uint64_t vOffset     __attribute__((aligned(8)));
      int32_t  lumMmxFilter[4*MAX_FILTER_SIZE];
      int32_t  chrMmxFilter[4*MAX_FILTER_SIZE];
      int dstW;
      uint64_t esp          __attribute__((aligned(8)));
      uint64_t vRounder     __attribute__((aligned(8)));
      uint64_t u_temp       __attribute__((aligned(8)));
      uint64_t v_temp       __attribute__((aligned(8)));
  
  #if HAVE_ALTIVEC
  
    vector signed short   CY;
    vector signed short   CRV;
    vector signed short   CBU;
    vector signed short   CGU;
    vector signed short   CGV;
    vector signed short   OY;
    vector unsigned short CSHIFT;
    vector signed short   *vYCoeffsBank, *vCCoeffsBank;
  
  #endif
  
  
  #if ARCH_BFIN
      uint32_t oy           __attribute__((aligned(4)));
      uint32_t oc           __attribute__((aligned(4)));
      uint32_t zero         __attribute__((aligned(4)));
      uint32_t cy           __attribute__((aligned(4)));
      uint32_t crv          __attribute__((aligned(4)));
      uint32_t rmask        __attribute__((aligned(4)));
      uint32_t cbu          __attribute__((aligned(4)));
      uint32_t bmask        __attribute__((aligned(4)));
      uint32_t cgu          __attribute__((aligned(4)));
      uint32_t cgv          __attribute__((aligned(4)));
      uint32_t gmask        __attribute__((aligned(4)));
  #endif
  
  #if HAVE_VIS
      uint64_t sparc_coeffs[10] __attribute__((aligned(8)));
  #endif
  
  } SwsContext;
  //FIXME check init (where 0)
  
  SwsFunc sws_yuv2rgb_get_func_ptr (SwsContext *c);
  int sws_yuv2rgb_c_init_tables (SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation);
  
  void sws_yuv2rgb_altivec_init_tables (SwsContext *c, const int inv_table[4],int brightness,int contrast, int saturation);
  SwsFunc sws_yuv2rgb_init_altivec (SwsContext *c);
  void altivec_yuv2packedX (SwsContext *c,
                            int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
                            int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
                            uint8_t *dest, int dstW, int dstY);
  
  const char *sws_format_name(int format);
  
  //FIXME replace this with something faster
  #define isPlanarYUV(x)  (           \
             (x)==PIX_FMT_YUV410P     \
          || (x)==PIX_FMT_YUV420P     \
          || (x)==PIX_FMT_YUV411P     \
          || (x)==PIX_FMT_YUV422P     \
          || (x)==PIX_FMT_YUV444P     \
          || (x)==PIX_FMT_YUV440P     \
          || (x)==PIX_FMT_NV12        \
          || (x)==PIX_FMT_NV21        \
      )
  #define isYUV(x)        (           \
             (x)==PIX_FMT_UYVY422     \
          || (x)==PIX_FMT_YUYV422     \
          || isPlanarYUV(x)           \
      )
  #define isGray(x)       (           \
             (x)==PIX_FMT_GRAY8       \
          || (x)==PIX_FMT_GRAY16BE    \
          || (x)==PIX_FMT_GRAY16LE    \
      )
  #define isGray16(x)     (           \
             (x)==PIX_FMT_GRAY16BE    \
          || (x)==PIX_FMT_GRAY16LE    \
      )
  #define isRGB(x)        (           \
             (x)==PIX_FMT_RGB32       \
          || (x)==PIX_FMT_RGB32_1     \
          || (x)==PIX_FMT_RGB24       \
          || (x)==PIX_FMT_RGB565      \
          || (x)==PIX_FMT_RGB555      \
          || (x)==PIX_FMT_RGB8        \
          || (x)==PIX_FMT_RGB4        \
          || (x)==PIX_FMT_RGB4_BYTE   \
          || (x)==PIX_FMT_MONOBLACK   \
          || (x)==PIX_FMT_MONOWHITE   \
      )
  #define isBGR(x)        (           \
             (x)==PIX_FMT_BGR32       \
          || (x)==PIX_FMT_BGR32_1     \
          || (x)==PIX_FMT_BGR24       \
          || (x)==PIX_FMT_BGR565      \
          || (x)==PIX_FMT_BGR555      \
          || (x)==PIX_FMT_BGR8        \
          || (x)==PIX_FMT_BGR4        \
          || (x)==PIX_FMT_BGR4_BYTE   \
          || (x)==PIX_FMT_MONOBLACK   \
          || (x)==PIX_FMT_MONOWHITE   \
      )
  #define isALPHA(x)      (           \
             (x)==PIX_FMT_BGR32       \
          || (x)==PIX_FMT_BGR32_1     \
          || (x)==PIX_FMT_RGB32       \
          || (x)==PIX_FMT_RGB32_1     \
          || (x)==PIX_FMT_YUVA420P    \
      )
  
  static inline int fmt_depth(int fmt)
  {
      switch(fmt) {
          case PIX_FMT_BGRA:
          case PIX_FMT_ABGR:
          case PIX_FMT_RGBA:
          case PIX_FMT_ARGB:
              return 32;
          case PIX_FMT_BGR24:
          case PIX_FMT_RGB24:
              return 24;
          case PIX_FMT_BGR565:
          case PIX_FMT_RGB565:
          case PIX_FMT_GRAY16BE:
          case PIX_FMT_GRAY16LE:
              return 16;
          case PIX_FMT_BGR555:
          case PIX_FMT_RGB555:
              return 15;
          case PIX_FMT_BGR8:
          case PIX_FMT_RGB8:
              return 8;
          case PIX_FMT_BGR4:
          case PIX_FMT_RGB4:
          case PIX_FMT_BGR4_BYTE:
          case PIX_FMT_RGB4_BYTE:
              return 4;
          case PIX_FMT_MONOBLACK:
          case PIX_FMT_MONOWHITE:
              return 1;
          default:
              return 0;
      }
  }
  
  extern const uint64_t ff_dither4[2];
  extern const uint64_t ff_dither8[2];
  
  extern const AVClass sws_context_class;
  
  #endif /* SWSCALE_SWSCALE_INTERNAL_H */
  