libswscale/swscale_internal.h
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 /*
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  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
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  * 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.
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  *
  * FFmpeg is distributed in the hope that it will be useful,
  * 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
  * License 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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 #ifndef SWSCALE_SWSCALE_INTERNAL_H
 #define SWSCALE_SWSCALE_INTERNAL_H
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 #include "config.h"
 
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 #if HAVE_ALTIVEC_H
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 #include <altivec.h>
 #endif
 
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 #include "libavutil/avutil.h"
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 #define STR(s)         AV_TOSTRING(s) //AV_STRINGIFY is too long
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 #define FAST_BGR2YV12 //use 7-bit instead of 15-bit coefficients
 
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 #define MAX_FILTER_SIZE 256
 
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 #define DITHER1XBPP
 
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 #if HAVE_BIGENDIAN
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 #define ALT32_CORR (-1)
 #else
 #define ALT32_CORR   1
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 #endif
 
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 #if ARCH_X86_64
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 #   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
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 #endif
 
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 struct SwsContext;
 
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 typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t* src[],
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                        int srcStride[], int srcSliceY, int srcSliceH,
                        uint8_t* dst[], int dstStride[]);
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 typedef void (*yuv2planar1_fn) (struct SwsContext *c,
                                 const int16_t *lumSrc, const int16_t *chrUSrc,
                                 const int16_t *chrVSrc, const int16_t *alpSrc,
                                 uint8_t *dest,
                                 uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
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                                 int dstW, int chrDstW, const uint8_t *lumDither, const uint8_t *chrDither);
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 typedef void (*yuv2planarX_fn) (struct SwsContext *c,
                                 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
                                 const int16_t *chrFilter, const int16_t **chrUSrc,
                                 const int16_t **chrVSrc, int chrFilterSize,
                                 const int16_t **alpSrc,
                                 uint8_t *dest,
                                 uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
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                                 int dstW, int chrDstW, const uint8_t *lumDither, const uint8_t *chrDither);
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 typedef void (*yuv2packed1_fn) (struct SwsContext *c,
                                 const uint16_t *buf0,
                                 const uint16_t *ubuf0, const uint16_t *ubuf1,
                                 const uint16_t *vbuf0, const uint16_t *vbuf1,
                                 const uint16_t *abuf0,
                                 uint8_t *dest,
                                 int dstW, int uvalpha, int dstFormat, int flags, int y);
 typedef void (*yuv2packed2_fn) (struct SwsContext *c,
                                 const uint16_t *buf0, const uint16_t *buf1,
                                 const uint16_t *ubuf0, const uint16_t *ubuf1,
                                 const uint16_t *vbuf0, const uint16_t *vbuf1,
                                 const uint16_t *abuf0, const uint16_t *abuf1,
                                 uint8_t *dest,
                                 int dstW, int yalpha, int uvalpha, int y);
 typedef void (*yuv2packedX_fn) (struct SwsContext *c,
                                 const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
                                 const int16_t *chrFilter, const int16_t **chrUSrc,
                                 const int16_t **chrVSrc, int chrFilterSize,
                                 const int16_t **alpSrc, uint8_t *dest,
                                 int dstW, int dstY);
 
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 /* This struct should be aligned on at least a 32-byte boundary. */
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 typedef struct SwsContext {
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     /**
      * info on struct for av_log
      */
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     const AVClass *av_class;
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     /**
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      * Note that src, dst, srcStride, dstStride will be copied in the
      * sws_scale() wrapper so they can be freely modified here.
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      */
     SwsFunc swScale;
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     int srcW;                     ///< Width  of source      luma/alpha planes.
     int srcH;                     ///< Height of source      luma/alpha planes.
     int dstH;                     ///< Height of destination luma/alpha planes.
     int chrSrcW;                  ///< Width  of source      chroma     planes.
     int chrSrcH;                  ///< Height of source      chroma     planes.
     int chrDstW;                  ///< Width  of destination chroma     planes.
     int chrDstH;                  ///< Height of destination chroma     planes.
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     int lumXInc, chrXInc;
     int lumYInc, chrYInc;
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     enum PixelFormat dstFormat;   ///< Destination pixel format.
     enum PixelFormat srcFormat;   ///< Source      pixel format.
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     int dstFormatBpp;             ///< Number of bits per pixel of the destination pixel format.
     int srcFormatBpp;             ///< Number of bits per pixel of the source      pixel format.
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     int chrSrcHSubSample;         ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source      image.
     int chrSrcVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in source      image.
     int chrDstHSubSample;         ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
     int chrDstVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in destination image.
     int vChrDrop;                 ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
     int sliceDir;                 ///< Direction that slices are fed to the scaler (1 = top-to-bottom, -1 = bottom-to-top).
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     double param[2];              ///< Input parameters for scaling algorithms that need them.
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     uint32_t pal_yuv[256];
     uint32_t pal_rgb[256];
 
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     /**
      * @name Scaled horizontal lines ring buffer.
      * The horizontal scaler keeps just enough scaled lines in a ring buffer
      * so they may be passed to the vertical scaler. The pointers to the
      * allocated buffers for each line are duplicated in sequence in the ring
      * buffer to simplify indexing and avoid wrapping around between lines
      * inside the vertical scaler code. The wrapping is done before the
      * vertical scaler is called.
      */
     //@{
     int16_t **lumPixBuf;          ///< Ring buffer for scaled horizontal luma   plane lines to be fed to the vertical scaler.
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     int16_t **chrUPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
     int16_t **chrVPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
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     int16_t **alpPixBuf;          ///< Ring buffer for scaled horizontal alpha  plane lines to be fed to the vertical scaler.
     int       vLumBufSize;        ///< Number of vertical luma/alpha lines allocated in the ring buffer.
     int       vChrBufSize;        ///< Number of vertical chroma     lines allocated in the ring buffer.
     int       lastInLumBuf;       ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
     int       lastInChrBuf;       ///< Last scaled horizontal chroma     line from source in the ring buffer.
     int       lumBufIndex;        ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
     int       chrBufIndex;        ///< Index in ring buffer of the last scaled horizontal chroma     line from source.
     //@}
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     uint8_t *formatConvBuffer;
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     /**
      * @name Horizontal and vertical filters.
      * To better understand the following fields, here is a pseudo-code of
      * their usage in filtering a horizontal line:
      * @code
      * for (i = 0; i < width; i++) {
      *     dst[i] = 0;
      *     for (j = 0; j < filterSize; j++)
      *         dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
      *     dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
      * }
      * @endcode
      */
     //@{
     int16_t *hLumFilter;          ///< Array of horizontal filter coefficients for luma/alpha planes.
     int16_t *hChrFilter;          ///< Array of horizontal filter coefficients for chroma     planes.
     int16_t *vLumFilter;          ///< Array of vertical   filter coefficients for luma/alpha planes.
     int16_t *vChrFilter;          ///< Array of vertical   filter coefficients for chroma     planes.
     int16_t *hLumFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
     int16_t *hChrFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for chroma     planes.
     int16_t *vLumFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for luma/alpha planes.
     int16_t *vChrFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for chroma     planes.
     int      hLumFilterSize;      ///< Horizontal filter size for luma/alpha pixels.
     int      hChrFilterSize;      ///< Horizontal filter size for chroma     pixels.
     int      vLumFilterSize;      ///< Vertical   filter size for luma/alpha pixels.
     int      vChrFilterSize;      ///< Vertical   filter size for chroma     pixels.
     //@}
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     int lumMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
     int chrMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma     planes.
     uint8_t *lumMmx2FilterCode;   ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
     uint8_t *chrMmx2FilterCode;   ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for chroma     planes.
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     int canMMX2BeUsed;
 
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     int dstY;                     ///< Last destination vertical line output from last slice.
     int flags;                    ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
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     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];
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     int srcRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (source      image).
     int dstRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
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     int yuv2rgb_y_offset;
     int yuv2rgb_y_coeff;
     int yuv2rgb_v2r_coeff;
     int yuv2rgb_v2g_coeff;
     int yuv2rgb_u2g_coeff;
     int yuv2rgb_u2b_coeff;
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 #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"
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 #define LUM_MMX_FILTER_OFFSET "11*8"
 #define CHR_MMX_FILTER_OFFSET "11*8+4*4*256"
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 #define DSTW_OFFSET           "11*8+4*4*256*2" //do not change, it is hardcoded in the ASM
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 #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"
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 #define Y_TEMP                "11*8+4*4*256*2+40"
 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
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 #define UV_OFF                "11*8+4*4*256*3+48"
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 #define UV_OFFx2              "11*8+4*4*256*3+56"
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 #define DITHER16              "11*8+4*4*256*3+64"
 #define DITHER32              "11*8+4*4*256*3+64+16"
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     DECLARE_ALIGNED(8, uint64_t, redDither);
     DECLARE_ALIGNED(8, uint64_t, greenDither);
     DECLARE_ALIGNED(8, uint64_t, blueDither);
 
     DECLARE_ALIGNED(8, uint64_t, yCoeff);
     DECLARE_ALIGNED(8, uint64_t, vrCoeff);
     DECLARE_ALIGNED(8, uint64_t, ubCoeff);
     DECLARE_ALIGNED(8, uint64_t, vgCoeff);
     DECLARE_ALIGNED(8, uint64_t, ugCoeff);
     DECLARE_ALIGNED(8, uint64_t, yOffset);
     DECLARE_ALIGNED(8, uint64_t, uOffset);
     DECLARE_ALIGNED(8, uint64_t, vOffset);
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     int32_t  lumMmxFilter[4*MAX_FILTER_SIZE];
     int32_t  chrMmxFilter[4*MAX_FILTER_SIZE];
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     int dstW;                     ///< Width  of destination luma/alpha planes.
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     DECLARE_ALIGNED(8, uint64_t, esp);
     DECLARE_ALIGNED(8, uint64_t, vRounder);
     DECLARE_ALIGNED(8, uint64_t, u_temp);
     DECLARE_ALIGNED(8, uint64_t, v_temp);
     DECLARE_ALIGNED(8, uint64_t, y_temp);
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     int32_t  alpMmxFilter[4*MAX_FILTER_SIZE];
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     DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
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     DECLARE_ALIGNED(8, ptrdiff_t, uv_offx2); ///< offset (in bytes) between u and v planes
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     uint16_t dither16[8];
     uint32_t dither32[8];
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 #if HAVE_ALTIVEC
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     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;
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 #endif
 
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 #if ARCH_BFIN
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     DECLARE_ALIGNED(4, uint32_t, oy);
     DECLARE_ALIGNED(4, uint32_t, oc);
     DECLARE_ALIGNED(4, uint32_t, zero);
     DECLARE_ALIGNED(4, uint32_t, cy);
     DECLARE_ALIGNED(4, uint32_t, crv);
     DECLARE_ALIGNED(4, uint32_t, rmask);
     DECLARE_ALIGNED(4, uint32_t, cbu);
     DECLARE_ALIGNED(4, uint32_t, bmask);
     DECLARE_ALIGNED(4, uint32_t, cgu);
     DECLARE_ALIGNED(4, uint32_t, cgv);
     DECLARE_ALIGNED(4, uint32_t, gmask);
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 #endif
 
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 #if HAVE_VIS
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     DECLARE_ALIGNED(8, uint64_t, sparc_coeffs)[10];
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 #endif
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     /* function pointers for swScale() */
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     yuv2planar1_fn yuv2yuv1;
     yuv2planarX_fn yuv2yuvX;
     yuv2packed1_fn yuv2packed1;
     yuv2packed2_fn yuv2packed2;
     yuv2packedX_fn yuv2packedX;
40fa5140
 
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     void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
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                       int width, uint32_t *pal); ///< Unscaled conversion of luma plane to YV12 for horizontal scaler.
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     void (*alpToYV12)(uint8_t *dst, const uint8_t *src,
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                       int width, uint32_t *pal); ///< Unscaled conversion of alpha plane to YV12 for horizontal scaler.
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     void (*chrToYV12)(uint8_t *dstU, uint8_t *dstV,
                       const uint8_t *src1, const uint8_t *src2,
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                       int width, uint32_t *pal); ///< Unscaled conversion of chroma planes to YV12 for horizontal scaler.
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     void (*hyscale_fast)(struct SwsContext *c,
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                          int16_t *dst, int dstWidth,
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                          const uint8_t *src, int srcW, int xInc);
     void (*hcscale_fast)(struct SwsContext *c,
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                          int16_t *dst1, int16_t *dst2, int dstWidth,
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                          const uint8_t *src1, const uint8_t *src2,
                          int srcW, int xInc);
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     void (*hScale)(int16_t *dst, int dstW, const uint8_t *src, int srcW,
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                    int xInc, const int16_t *filter, const int16_t *filterPos,
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                    int filterSize);
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     void (*hScale16)(int16_t *dst, int dstW, const uint16_t *src, int srcW,
                    int xInc, const int16_t *filter, const int16_t *filterPos,
                    long filterSize, int shift);
 
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     void (*lumConvertRange)(int16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
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     void (*chrConvertRange)(int16_t *dst1, int16_t *dst2, int width); ///< Color range conversion function for chroma planes if needed.
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     int needs_hcscale; ///< Set if there are chroma planes to be converted.
 
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 } SwsContext;
 //FIXME check init (where 0)
 
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 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c);
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 int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
                              int fullRange, int brightness,
                              int contrast, int saturation);
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 void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
                                     int brightness, int contrast, int saturation);
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 void updateMMXDitherTables(SwsContext *c, int dstY, int lumBufIndex, int chrBufIndex,
                            int lastInLumBuf, int lastInChrBuf);
 
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 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
 SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
 SwsFunc ff_yuv2rgb_init_mlib(SwsContext *c);
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 SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c);
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 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c);
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 void ff_bfin_get_unscaled_swscale(SwsContext *c);
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 #if FF_API_SWS_FORMAT_NAME
 /**
  * @deprecated Use av_get_pix_fmt_name() instead.
  */
 attribute_deprecated
 const char *sws_format_name(enum PixelFormat format);
 #endif
 
e9e12f0e
 //FIXME replace this with something faster
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 #define is16BPS(x)      (           \
            (x)==PIX_FMT_GRAY16BE    \
         || (x)==PIX_FMT_GRAY16LE    \
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         || (x)==PIX_FMT_BGR48BE     \
         || (x)==PIX_FMT_BGR48LE     \
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         || (x)==PIX_FMT_RGB48BE     \
         || (x)==PIX_FMT_RGB48LE     \
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         || (x)==PIX_FMT_YUV420P16LE \
         || (x)==PIX_FMT_YUV422P16LE \
         || (x)==PIX_FMT_YUV444P16LE \
         || (x)==PIX_FMT_YUV420P16BE \
         || (x)==PIX_FMT_YUV422P16BE \
         || (x)==PIX_FMT_YUV444P16BE \
714f32bf
     )
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 #define isNBPS(x)       (           \
            (x)==PIX_FMT_YUV420P9LE  \
         || (x)==PIX_FMT_YUV420P9BE  \
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         || (x)==PIX_FMT_YUV444P9BE  \
         || (x)==PIX_FMT_YUV444P9LE  \
         || (x)==PIX_FMT_YUV422P10BE \
         || (x)==PIX_FMT_YUV422P10LE \
         || (x)==PIX_FMT_YUV444P10BE \
         || (x)==PIX_FMT_YUV444P10LE \
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         || (x)==PIX_FMT_YUV420P10LE \
         || (x)==PIX_FMT_YUV420P10BE \
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         || (x)==PIX_FMT_YUV422P10LE \
         || (x)==PIX_FMT_YUV422P10BE \
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     )
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 #define is9_OR_10BPS isNBPS //for ronald
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 #define isBE(x) ((x)&1)
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 #define isPlanar8YUV(x) (           \
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            (x)==PIX_FMT_YUV410P     \
         || (x)==PIX_FMT_YUV420P     \
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         || (x)==PIX_FMT_YUVA420P    \
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         || (x)==PIX_FMT_YUV411P     \
         || (x)==PIX_FMT_YUV422P     \
         || (x)==PIX_FMT_YUV444P     \
9ba7fe6d
         || (x)==PIX_FMT_YUV440P     \
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         || (x)==PIX_FMT_NV12        \
         || (x)==PIX_FMT_NV21        \
     )
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 #define isPlanarYUV(x)  (           \
         isPlanar8YUV(x)             \
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         || (x)==PIX_FMT_YUV420P9LE  \
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         || (x)==PIX_FMT_YUV444P9LE  \
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         || (x)==PIX_FMT_YUV420P10LE \
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         || (x)==PIX_FMT_YUV422P10LE \
         || (x)==PIX_FMT_YUV444P10LE \
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         || (x)==PIX_FMT_YUV420P16LE \
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         || (x)==PIX_FMT_YUV422P10LE \
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         || (x)==PIX_FMT_YUV422P16LE \
         || (x)==PIX_FMT_YUV444P16LE \
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         || (x)==PIX_FMT_YUV420P9BE  \
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         || (x)==PIX_FMT_YUV444P9BE  \
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         || (x)==PIX_FMT_YUV420P10BE \
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         || (x)==PIX_FMT_YUV422P10BE \
         || (x)==PIX_FMT_YUV444P10BE \
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         || (x)==PIX_FMT_YUV420P16BE \
b9e60849
         || (x)==PIX_FMT_YUV422P10BE \
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         || (x)==PIX_FMT_YUV422P16BE \
         || (x)==PIX_FMT_YUV444P16BE \
de1275d5
     )
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 #define isYUV(x)        (           \
            (x)==PIX_FMT_UYVY422     \
         || (x)==PIX_FMT_YUYV422     \
         || isPlanarYUV(x)           \
     )
 #define isGray(x)       (           \
            (x)==PIX_FMT_GRAY8       \
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         || (x)==PIX_FMT_GRAY8A      \
9d9de37d
         || (x)==PIX_FMT_GRAY16BE    \
         || (x)==PIX_FMT_GRAY16LE    \
     )
 #define isGray16(x)     (           \
            (x)==PIX_FMT_GRAY16BE    \
         || (x)==PIX_FMT_GRAY16LE    \
     )
3b1ee703
 #define isRGBinInt(x)   (           \
e8417235
            (x)==PIX_FMT_RGB48BE     \
         || (x)==PIX_FMT_RGB48LE     \
         || (x)==PIX_FMT_RGB32       \
9990e426
         || (x)==PIX_FMT_RGB32_1     \
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         || (x)==PIX_FMT_RGB24       \
1379b584
         || (x)==PIX_FMT_RGB565BE    \
         || (x)==PIX_FMT_RGB565LE    \
         || (x)==PIX_FMT_RGB555BE    \
         || (x)==PIX_FMT_RGB555LE    \
a4e44130
         || (x)==PIX_FMT_RGB444BE    \
         || (x)==PIX_FMT_RGB444LE    \
9d9de37d
         || (x)==PIX_FMT_RGB8        \
         || (x)==PIX_FMT_RGB4        \
         || (x)==PIX_FMT_RGB4_BYTE   \
         || (x)==PIX_FMT_MONOBLACK   \
ec1bca2a
         || (x)==PIX_FMT_MONOWHITE   \
9d9de37d
     )
3b1ee703
 #define isBGRinInt(x)   (           \
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            (x)==PIX_FMT_BGR48BE     \
         || (x)==PIX_FMT_BGR48LE     \
         || (x)==PIX_FMT_BGR32       \
9990e426
         || (x)==PIX_FMT_BGR32_1     \
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         || (x)==PIX_FMT_BGR24       \
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         || (x)==PIX_FMT_BGR565BE    \
         || (x)==PIX_FMT_BGR565LE    \
         || (x)==PIX_FMT_BGR555BE    \
         || (x)==PIX_FMT_BGR555LE    \
a4e44130
         || (x)==PIX_FMT_BGR444BE    \
         || (x)==PIX_FMT_BGR444LE    \
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         || (x)==PIX_FMT_BGR8        \
         || (x)==PIX_FMT_BGR4        \
         || (x)==PIX_FMT_BGR4_BYTE   \
         || (x)==PIX_FMT_MONOBLACK   \
ec1bca2a
         || (x)==PIX_FMT_MONOWHITE   \
9d9de37d
     )
81858371
 #define isRGBinBytes(x) (           \
            (x)==PIX_FMT_RGB48BE     \
         || (x)==PIX_FMT_RGB48LE     \
         || (x)==PIX_FMT_RGBA        \
         || (x)==PIX_FMT_ARGB        \
         || (x)==PIX_FMT_RGB24       \
     )
 #define isBGRinBytes(x) (           \
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            (x)==PIX_FMT_BGR48BE     \
         || (x)==PIX_FMT_BGR48LE     \
         || (x)==PIX_FMT_BGRA        \
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         || (x)==PIX_FMT_ABGR        \
         || (x)==PIX_FMT_BGR24       \
     )
 #define isAnyRGB(x)     (           \
             isRGBinInt(x)           \
         ||  isBGRinInt(x)           \
     )
c2751600
 #define isALPHA(x)      (           \
            (x)==PIX_FMT_BGR32       \
         || (x)==PIX_FMT_BGR32_1     \
         || (x)==PIX_FMT_RGB32       \
         || (x)==PIX_FMT_RGB32_1     \
624a7e00
         || (x)==PIX_FMT_PAL8        \
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         || (x)==PIX_FMT_GRAY8A      \
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         || (x)==PIX_FMT_YUVA420P    \
     )
6af28010
 #define isPacked(x)         (       \
            (x)==PIX_FMT_PAL8        \
         || (x)==PIX_FMT_YUYV422     \
         || (x)==PIX_FMT_UYVY422     \
         || (x)==PIX_FMT_Y400A       \
         || isAnyRGB(x)              \
     )
e91946ed
 #define usePal(x) ((av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL) || (x) == PIX_FMT_GRAY8A)
e9e12f0e
 
43175f50
 extern const uint64_t ff_dither4[2];
 extern const uint64_t ff_dither8[2];
87f40364
 extern const uint8_t dithers[8][8][8];
7a8228c0
 extern const uint16_t dither_scale[15][16];
87f40364
 
0cb25594
 
e40b183d
 extern const AVClass sws_context_class;
 
a4388ebd
 /**
  * Sets c->swScale to an unscaled converter if one exists for the specific
  * source and destination formats, bit depths, flags, etc.
  */
 void ff_get_unscaled_swscale(SwsContext *c);
 
0e5d31b1
 void ff_swscale_get_unscaled_altivec(SwsContext *c);
 
a4388ebd
 /**
  * Returns function pointer to fastest main scaler path function depending
  * on architecture and available optimizations.
  */
 SwsFunc ff_getSwsFunc(SwsContext *c);
 
67d80a54
 void ff_sws_init_swScale_altivec(SwsContext *c);
983260b0
 void ff_sws_init_swScale_mmx(SwsContext *c);
67d80a54
 
0eaf5235
 #endif /* SWSCALE_SWSCALE_INTERNAL_H */