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/*
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 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with 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
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#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>
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#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 MAX_FILTER_SIZE 256
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#if ARCH_X86
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#define VOFW 5120
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#else
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#define VOFW 2048 // faster on PPC and not tested on others
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#endif
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#define VOF  (VOFW*2)
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#if HAVE_BIGENDIAN
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#define ALT32_CORR (-1)
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#else
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#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
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#   define APCK_COEF 16
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#   define APCK_SIZE 24
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#else
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#   define APCK_PTR2 4
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#   define APCK_COEF 8
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#   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,
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                       uint8_t* dst[], int dstStride[]);
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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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    /**
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     * info on struct for av_log
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     */
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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
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     * sws_scale() wrapper so they can be freely modified here.
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     */
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    SwsFunc swScale;
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    int srcW;                     ///< Width  of source      luma/alpha planes.
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    int srcH;                     ///< Height of source      luma/alpha planes.
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    int dstH;                     ///< Height of destination luma/alpha planes.
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    int chrSrcW;                  ///< Width  of source      chroma     planes.
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    int chrSrcH;                  ///< Height of source      chroma     planes.
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    int chrDstW;                  ///< Width  of destination chroma     planes.
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    int chrDstH;                  ///< Height of destination chroma     planes.
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    int lumXInc, chrXInc;
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    int lumYInc, chrYInc;
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    enum PixelFormat dstFormat;   ///< Destination pixel format.
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    enum PixelFormat srcFormat;   ///< Source      pixel format.
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    int dstFormatBpp;             ///< Number of bits per pixel of the destination pixel format.
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    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.
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    int chrSrcVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in source      image.
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    int chrDstHSubSample;         ///< Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination image.
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    int chrDstVSubSample;         ///< Binary logarithm of vertical   subsampling factor between luma/alpha and chroma planes in destination image.
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    int vChrDrop;                 ///< Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user.
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    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];
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    uint32_t pal_rgb[256];
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    /**
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     * @name Scaled horizontal lines ring buffer.
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     * The horizontal scaler keeps just enough scaled lines in a ring buffer
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     * so they may be passed to the vertical scaler. The pointers to the
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     * allocated buffers for each line are duplicated in sequence in the ring
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     * buffer to simplify indexing and avoid wrapping around between lines
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     * inside the vertical scaler code. The wrapping is done before the
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     * vertical scaler is called.
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     */
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    //@{
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    int16_t **lumPixBuf;          ///< Ring buffer for scaled horizontal luma   plane lines to be fed to the vertical scaler.
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    int16_t **chrPixBuf;          ///< 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.
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    int       vLumBufSize;        ///< Number of vertical luma/alpha lines allocated in the ring buffer.
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    int       vChrBufSize;        ///< Number of vertical chroma     lines allocated in the ring buffer.
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    int       lastInLumBuf;       ///< Last scaled horizontal luma/alpha line from source in the ring buffer.
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    int       lastInChrBuf;       ///< Last scaled horizontal chroma     line from source in the ring buffer.
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    int       lumBufIndex;        ///< Index in ring buffer of the last scaled horizontal luma/alpha line from source.
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    int       chrBufIndex;        ///< Index in ring buffer of the last scaled horizontal chroma     line from source.
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    //@}
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    uint8_t formatConvBuffer[VOF]; //FIXME dynamic allocation, but we have to change a lot of code for this to be useful
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    /**
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     * @name Horizontal and vertical filters.
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     * To better understand the following fields, here is a pseudo-code of
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     * their usage in filtering a horizontal line:
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     * @code
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     * for (i = 0; i < width; i++) {
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     *     dst[i] = 0;
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     *     for (j = 0; j < filterSize; j++)
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     *         dst[i] += src[ filterPos[i] + j ] * filter[ filterSize * i + j ];
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     *     dst[i] >>= FRAC_BITS; // The actual implementation is fixed-point.
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     * }
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     * @endcode
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     */
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    //@{
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    int16_t *hLumFilter;          ///< Array of horizontal filter coefficients for luma/alpha planes.
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    int16_t *hChrFilter;          ///< Array of horizontal filter coefficients for chroma     planes.
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    int16_t *vLumFilter;          ///< Array of vertical   filter coefficients for luma/alpha planes.
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    int16_t *vChrFilter;          ///< Array of vertical   filter coefficients for chroma     planes.
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    int16_t *hLumFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
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    int16_t *hChrFilterPos;       ///< Array of horizontal filter starting positions for each dst[i] for chroma     planes.
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    int16_t *vLumFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for luma/alpha planes.
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    int16_t *vChrFilterPos;       ///< Array of vertical   filter starting positions for each dst[i] for chroma     planes.
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    int      hLumFilterSize;      ///< Horizontal filter size for luma/alpha pixels.
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    int      hChrFilterSize;      ///< Horizontal filter size for chroma     pixels.
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    int      vLumFilterSize;      ///< Vertical   filter size for luma/alpha pixels.
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    int      vChrFilterSize;      ///< Vertical   filter size for chroma     pixels.
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    //@}
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    int lumMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for luma/alpha planes.
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    int chrMmx2FilterCodeSize;    ///< Runtime-generated MMX2 horizontal fast bilinear scaler code size for chroma     planes.
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    uint8_t *lumMmx2FilterCode;   ///< Runtime-generated MMX2 horizontal fast bilinear scaler code for luma/alpha planes.
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    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.
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    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()
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    uint8_t * table_rV[256];
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    uint8_t * table_gU[256];
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    int    table_gV[256];
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    uint8_t * table_bU[256];
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    //Colorspace stuff
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    int contrast, brightness, saturation;    // for sws_getColorspaceDetails
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    int srcColorspaceTable[4];
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    int dstColorspaceTable[4];
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    int srcRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (source      image).
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    int dstRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
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    int yuv2rgb_y_offset;
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    int yuv2rgb_y_coeff;
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    int yuv2rgb_v2r_coeff;
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    int yuv2rgb_v2g_coeff;
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    int yuv2rgb_u2g_coeff;
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    int yuv2rgb_u2b_coeff;
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#define RED_DITHER            "0*8"
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#define GREEN_DITHER          "1*8"
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#define BLUE_DITHER           "2*8"
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#define Y_COEFF               "3*8"
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#define VR_COEFF              "4*8"
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#define UB_COEFF              "5*8"
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#define VG_COEFF              "6*8"
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#define UG_COEFF              "7*8"
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#define Y_OFFSET              "8*8"
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#define U_OFFSET              "9*8"
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#define V_OFFSET              "10*8"
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#define LUM_MMX_FILTER_OFFSET "11*8"
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#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"
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#define VROUNDER_OFFSET       "11*8+4*4*256*2+16"
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#define U_TEMP                "11*8+4*4*256*2+24"
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#define V_TEMP                "11*8+4*4*256*2+32"
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#define Y_TEMP                "11*8+4*4*256*2+40"
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#define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
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    DECLARE_ALIGNED(8, uint64_t, redDither);
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    DECLARE_ALIGNED(8, uint64_t, greenDither);
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    DECLARE_ALIGNED(8, uint64_t, blueDither);
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    DECLARE_ALIGNED(8, uint64_t, yCoeff);
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    DECLARE_ALIGNED(8, uint64_t, vrCoeff);
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    DECLARE_ALIGNED(8, uint64_t, ubCoeff);
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    DECLARE_ALIGNED(8, uint64_t, vgCoeff);
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    DECLARE_ALIGNED(8, uint64_t, ugCoeff);
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    DECLARE_ALIGNED(8, uint64_t, yOffset);
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    DECLARE_ALIGNED(8, uint64_t, uOffset);
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    DECLARE_ALIGNED(8, uint64_t, vOffset);
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    int32_t  lumMmxFilter[4*MAX_FILTER_SIZE];
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    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);
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    DECLARE_ALIGNED(8, uint64_t, vRounder);
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    DECLARE_ALIGNED(8, uint64_t, u_temp);
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    DECLARE_ALIGNED(8, uint64_t, v_temp);
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    DECLARE_ALIGNED(8, uint64_t, y_temp);
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    int32_t  alpMmxFilter[4*MAX_FILTER_SIZE];
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#if HAVE_ALTIVEC
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    vector signed short   CY;
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    vector signed short   CRV;
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    vector signed short   CBU;
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    vector signed short   CGU;
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    vector signed short   CGV;
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    vector signed short   OY;
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    vector unsigned short CSHIFT;
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    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);
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    DECLARE_ALIGNED(4, uint32_t, oc);
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    DECLARE_ALIGNED(4, uint32_t, zero);
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    DECLARE_ALIGNED(4, uint32_t, cy);
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    DECLARE_ALIGNED(4, uint32_t, crv);
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    DECLARE_ALIGNED(4, uint32_t, rmask);
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    DECLARE_ALIGNED(4, uint32_t, cbu);
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    DECLARE_ALIGNED(4, uint32_t, bmask);
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    DECLARE_ALIGNED(4, uint32_t, cgu);
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    DECLARE_ALIGNED(4, uint32_t, cgv);
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    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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    void (*yuv2nv12X  )(struct SwsContext *c,
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                        const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
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                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
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                        uint8_t *dest, uint8_t *uDest,
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                        int dstW, int chrDstW, int dstFormat);
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    void (*yuv2yuv1   )(struct SwsContext *c,
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                        const int16_t *lumSrc, const int16_t *chrSrc, const int16_t *alpSrc,
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                        uint8_t *dest,
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                        uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
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                        long dstW, long chrDstW);
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    void (*yuv2yuvX   )(struct SwsContext *c,
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                        const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
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                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
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                        const int16_t **alpSrc,
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                        uint8_t *dest,
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                        uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
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                        long dstW, long chrDstW);
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    void (*yuv2packed1)(struct SwsContext *c,
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                        const uint16_t *buf0,
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                        const uint16_t *uvbuf0, const uint16_t *uvbuf1,
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                        const uint16_t *abuf0,
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                        uint8_t *dest,
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                        int dstW, int uvalpha, int dstFormat, int flags, int y);
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    void (*yuv2packed2)(struct SwsContext *c,
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                        const uint16_t *buf0, const uint16_t *buf1,
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                        const uint16_t *uvbuf0, const uint16_t *uvbuf1,
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                        const uint16_t *abuf0, const uint16_t *abuf1,
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                        uint8_t *dest,
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                        int dstW, int yalpha, int uvalpha, int y);
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    void (*yuv2packedX)(struct SwsContext *c,
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                        const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
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                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
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                        const int16_t **alpSrc, uint8_t *dest,
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                        long dstW, long dstY);
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    void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
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                      long 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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                      long 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,
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                      const uint8_t *src1, const uint8_t *src2,
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                      long 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, long dstWidth,
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                         const uint8_t *src, int srcW, int xInc);
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    void (*hcscale_fast)(struct SwsContext *c,
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                         int16_t *dst, long dstWidth,
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                         const uint8_t *src1, const uint8_t *src2,
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                         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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                   long filterSize);
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    void (*lumConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
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    void (*chrConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for chroma planes if needed.
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    int lumSrcOffset; ///< Offset given to luma src pointers passed to horizontal input functions.
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    int chrSrcOffset; ///< Offset given to chroma src pointers passed to horizontal input functions.
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    int alpSrcOffset; ///< Offset given to alpha src pointers passed to horizontal input functions.
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    int needs_hcscale; ///< Set if there are chroma planes to be converted.
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} SwsContext;
318
//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],
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                             int fullRange, int brightness,
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                             int contrast, int saturation);
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void ff_yuv2rgb_init_tables_altivec(SwsContext *c, const int inv_table[4],
326
                                    int brightness, int contrast, int saturation);
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SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c);
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SwsFunc ff_yuv2rgb_init_vis(SwsContext *c);
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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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void ff_yuv2packedX_altivec(SwsContext *c,
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                            const int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
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                            const int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
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                            uint8_t *dest, int dstW, int dstY);
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const char *sws_format_name(enum PixelFormat format);
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//FIXME replace this with something faster
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#define is16BPS(x)      (           \
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           (x)==PIX_FMT_GRAY16BE    \
343
        || (x)==PIX_FMT_GRAY16LE    \
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        || (x)==PIX_FMT_RGB48BE     \
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        || (x)==PIX_FMT_RGB48LE     \
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        || (x)==PIX_FMT_YUV420P16LE   \
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        || (x)==PIX_FMT_YUV422P16LE   \
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        || (x)==PIX_FMT_YUV444P16LE   \
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        || (x)==PIX_FMT_YUV420P16BE   \
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        || (x)==PIX_FMT_YUV422P16BE   \
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        || (x)==PIX_FMT_YUV444P16BE   \
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    )
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#define isBE(x) ((x)&1)
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#define isPlanar8YUV(x) (           \
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           (x)==PIX_FMT_YUV410P     \
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        || (x)==PIX_FMT_YUV420P     \
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        || (x)==PIX_FMT_YUVA420P    \
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        || (x)==PIX_FMT_YUV411P     \
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        || (x)==PIX_FMT_YUV422P     \
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        || (x)==PIX_FMT_YUV444P     \
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        || (x)==PIX_FMT_YUV440P     \
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        || (x)==PIX_FMT_NV12        \
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        || (x)==PIX_FMT_NV21        \
364
    )
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#define isPlanarYUV(x)  (           \
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        isPlanar8YUV(x)             \
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        || (x)==PIX_FMT_YUV420P16LE   \
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        || (x)==PIX_FMT_YUV422P16LE   \
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        || (x)==PIX_FMT_YUV444P16LE   \
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        || (x)==PIX_FMT_YUV420P16BE   \
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        || (x)==PIX_FMT_YUV422P16BE   \
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        || (x)==PIX_FMT_YUV444P16BE   \
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    )
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#define isYUV(x)        (           \
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           (x)==PIX_FMT_UYVY422     \
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        || (x)==PIX_FMT_YUYV422     \
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        || isPlanarYUV(x)           \
378
    )
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#define isGray(x)       (           \
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           (x)==PIX_FMT_GRAY8       \
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        || (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
383
    )
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#define isGray16(x)     (           \
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           (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
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    )
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#define isRGBinInt(x)   (           \
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           (x)==PIX_FMT_RGB48BE     \
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        || (x)==PIX_FMT_RGB48LE     \
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        || (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_RGB24       \
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        || (x)==PIX_FMT_RGB565BE    \
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        || (x)==PIX_FMT_RGB565LE    \
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        || (x)==PIX_FMT_RGB555BE    \
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        || (x)==PIX_FMT_RGB555LE    \
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        || (x)==PIX_FMT_RGB8        \
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        || (x)==PIX_FMT_RGB4        \
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        || (x)==PIX_FMT_RGB4_BYTE   \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    )
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#define isBGRinInt(x)   (           \
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           (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_BGR24       \
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        || (x)==PIX_FMT_BGR565BE    \
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        || (x)==PIX_FMT_BGR565LE    \
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        || (x)==PIX_FMT_BGR555BE    \
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        || (x)==PIX_FMT_BGR555LE    \
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        || (x)==PIX_FMT_BGR8        \
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        || (x)==PIX_FMT_BGR4        \
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        || (x)==PIX_FMT_BGR4_BYTE   \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    )
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#define isRGBinBytes(x) (           \
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           (x)==PIX_FMT_RGB48BE     \
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        || (x)==PIX_FMT_RGB48LE     \
421
        || (x)==PIX_FMT_RGBA        \
422
        || (x)==PIX_FMT_ARGB        \
423
        || (x)==PIX_FMT_RGB24       \
424
    )
425
#define isBGRinBytes(x) (           \
426
           (x)==PIX_FMT_BGRA        \
427
        || (x)==PIX_FMT_ABGR        \
428
        || (x)==PIX_FMT_BGR24       \
429
    )
430
#define isAnyRGB(x)     (           \
431
            isRGBinInt(x)           \
432
        ||  isBGRinInt(x)           \
433
    )
434
#define isALPHA(x)      (           \
435
           (x)==PIX_FMT_BGR32       \
436
        || (x)==PIX_FMT_BGR32_1     \
437
        || (x)==PIX_FMT_RGB32       \
438
        || (x)==PIX_FMT_RGB32_1     \
439
        || (x)==PIX_FMT_YUVA420P    \
440
    )
441

    
442
extern const uint64_t ff_dither4[2];
443
extern const uint64_t ff_dither8[2];
444

    
445
extern const AVClass sws_context_class;
446

    
447
/**
448
 * Sets c->swScale to an unscaled converter if one exists for the specific
449
 * source and destination formats, bit depths, flags, etc.
450
 */
451
void ff_get_unscaled_swscale(SwsContext *c);
452

    
453
/**
454
 * Returns the SWS_CPU_CAPS for the optimized code compiled into swscale.
455
 */
456
int ff_hardcodedcpuflags(void);
457

    
458
/**
459
 * Returns function pointer to fastest main scaler path function depending
460
 * on architecture and available optimizations.
461
 */
462
SwsFunc ff_getSwsFunc(SwsContext *c);
463

    
464
#endif /* SWSCALE_SWSCALE_INTERNAL_H */