qemu/ui/vnc-enc-zywrle-template.c
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   2/********************************************************************
   3 *                                                                  *
   4 * THIS FILE IS PART OF THE 'ZYWRLE' VNC CODEC SOURCE CODE.         *
   5 *                                                                  *
   6 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   7 * GOVERNED BY A FOLLOWING BSD-STYLE SOURCE LICENSE.                *
   8 * PLEASE READ THESE TERMS BEFORE DISTRIBUTING.                     *
   9 *                                                                  *
  10 * THE 'ZYWRLE' VNC CODEC SOURCE CODE IS (C) COPYRIGHT 2006         *
  11 * BY Hitachi Systems & Services, Ltd.                              *
  12 * (Noriaki Yamazaki, Research & Development Center)               *
  13 *                                                                  *
  14 *                                                                  *
  15 ********************************************************************
  16Redistribution and use in source and binary forms, with or without
  17modification, are permitted provided that the following conditions
  18are met:
  19
  20- Redistributions of source code must retain the above copyright
  21notice, this list of conditions and the following disclaimer.
  22
  23- Redistributions in binary form must reproduce the above copyright
  24notice, this list of conditions and the following disclaimer in the
  25documentation and/or other materials provided with the distribution.
  26
  27- Neither the name of the Hitachi Systems & Services, Ltd. nor
  28the names of its contributors may be used to endorse or promote
  29products derived from this software without specific prior written
  30permission.
  31
  32THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  35A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION
  36OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  37SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  38LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  39DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  40THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  41(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  42OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  43 ********************************************************************/
  44
  45/* Change Log:
  46     V0.02 : 2008/02/04 : Fix mis encode/decode when width != scanline
  47                             (Thanks Johannes Schindelin, author of LibVNC
  48                                                  Server/Client)
  49     V0.01 : 2007/02/06 : Initial release
  50*/
  51
  52/*
  53[References]
  54 PLHarr:
  55   Senecal, J. G., P. Lindstrom, M. A. Duchaineau, and K. I. Joy,
  56   "An Improved N-Bit to N-Bit Reversible Haar-Like Transform,"
  57   Pacific Graphics 2004, October 2004, pp. 371-380.
  58 EZW:
  59   Shapiro, JM: Embedded Image Coding Using Zerotrees of Wavelet Coefficients,
  60   IEEE Trans. Signal. Process., Vol.41, pp.3445-3462 (1993).
  61*/
  62
  63
  64/* Template Macro stuffs. */
  65#undef ZYWRLE_ANALYZE
  66#undef ZYWRLE_SYNTHESIZE
  67
  68#define ZYWRLE_SUFFIX     ZRLE_CONCAT2(ZRLE_BPP,ZRLE_ENDIAN_SUFFIX)
  69
  70#define ZYWRLE_ANALYZE    ZRLE_CONCAT2(zywrle_analyze_,   ZYWRLE_SUFFIX)
  71#define ZYWRLE_SYNTHESIZE ZRLE_CONCAT2(zywrle_synthesize_,ZYWRLE_SUFFIX)
  72
  73#define ZYWRLE_RGBYUV     ZRLE_CONCAT2(zywrle_rgbyuv_,    ZYWRLE_SUFFIX)
  74#define ZYWRLE_YUVRGB     ZRLE_CONCAT2(zywrle_yuvrgb_,    ZYWRLE_SUFFIX)
  75#define ZYWRLE_YMASK      ZRLE_CONCAT2(ZYWRLE_YMASK,      ZRLE_BPP)
  76#define ZYWRLE_UVMASK     ZRLE_CONCAT2(ZYWRLE_UVMASK,     ZRLE_BPP)
  77#define ZYWRLE_LOAD_PIXEL ZRLE_CONCAT2(ZYWRLE_LOAD_PIXEL, ZRLE_BPP)
  78#define ZYWRLE_SAVE_PIXEL ZRLE_CONCAT2(ZYWRLE_SAVE_PIXEL, ZRLE_BPP)
  79
  80/* Packing/Unpacking pixel stuffs.
  81   Endian conversion stuffs. */
  82#undef S_0
  83#undef S_1
  84#undef L_0
  85#undef L_1
  86#undef L_2
  87
  88#if ZYWRLE_ENDIAN == ENDIAN_BIG
  89#  define S_0   1
  90#  define S_1   0
  91#  define L_0   3
  92#  define L_1   2
  93#  define L_2   1
  94#else
  95#  define S_0   0
  96#  define S_1   1
  97#  define L_0   0
  98#  define L_1   1
  99#  define L_2   2
 100#endif
 101
 102#define ZYWRLE_QUANTIZE
 103#include "qemu/osdep.h"
 104#include "vnc-enc-zywrle.h"
 105
 106#ifndef ZRLE_COMPACT_PIXEL
 107static inline void ZYWRLE_RGBYUV(int *buf, ZRLE_PIXEL *data,
 108                                 int width, int height, int scanline)
 109{
 110    int r, g, b;
 111    int y, u, v;
 112    int *line;
 113    int *end;
 114
 115    end = buf + height * width;
 116    while (buf < end) {
 117        line = buf + width;
 118        while (buf < line) {
 119            ZYWRLE_LOAD_PIXEL(data, r, g, b);
 120            ZYWRLE_RGBYUV_(r, g, b, y, u, v, ZYWRLE_YMASK, ZYWRLE_UVMASK);
 121            ZYWRLE_SAVE_COEFF(buf, v, y, u);
 122            buf++;
 123            data++;
 124        }
 125        data += scanline - width;
 126    }
 127}
 128
 129static ZRLE_PIXEL *ZYWRLE_ANALYZE(ZRLE_PIXEL *dst, ZRLE_PIXEL *src,
 130                                  int w, int h, int scanline, int level,
 131                                  int *buf) {
 132    int l;
 133    int uw = w;
 134    int uh = h;
 135    int *top;
 136    int *end;
 137    int *line;
 138    ZRLE_PIXEL *p;
 139    int r, g, b;
 140    int s;
 141    int *ph;
 142
 143    zywrle_calc_size(&w, &h, level);
 144
 145    if (w == 0 || h == 0) {
 146        return NULL;
 147    }
 148    uw -= w;
 149    uh -= h;
 150
 151    p = dst;
 152    ZYWRLE_LOAD_UNALIGN(src,*(ZRLE_PIXEL*)top = *p;);
 153    ZYWRLE_RGBYUV(buf, src, w, h, scanline);
 154    wavelet(buf, w, h, level);
 155    for (l = 0; l < level; l++) {
 156        ZYWRLE_PACK_COEFF(buf, dst, 3, w, h, scanline, l);
 157        ZYWRLE_PACK_COEFF(buf, dst, 2, w, h, scanline, l);
 158        ZYWRLE_PACK_COEFF(buf, dst, 1, w, h, scanline, l);
 159        if (l == level - 1) {
 160            ZYWRLE_PACK_COEFF(buf, dst, 0, w, h, scanline, l);
 161        }
 162    }
 163    ZYWRLE_SAVE_UNALIGN(dst,*dst = *(ZRLE_PIXEL*)top;);
 164    return dst;
 165}
 166#endif  /* ZRLE_COMPACT_PIXEL */
 167
 168#undef ZYWRLE_RGBYUV
 169#undef ZYWRLE_YUVRGB
 170#undef ZYWRLE_LOAD_PIXEL
 171#undef ZYWRLE_SAVE_PIXEL
 172