qemu/ui/vnc-enc-zywrle-template.c
<<
>>
Prefs
   1
   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 "vnc-enc-zywrle.h"
 104
 105#ifndef ZRLE_COMPACT_PIXEL
 106static inline void ZYWRLE_RGBYUV(int *buf, ZRLE_PIXEL *data,
 107                                 int width, int height, int scanline)
 108{
 109    int r, g, b;
 110    int y, u, v;
 111    int *line;
 112    int *end;
 113
 114    end = buf + height * width;
 115    while (buf < end) {
 116        line = buf + width;
 117        while (buf < line) {
 118            ZYWRLE_LOAD_PIXEL(data, r, g, b);
 119            ZYWRLE_RGBYUV_(r, g, b, y, u, v, ZYWRLE_YMASK, ZYWRLE_UVMASK);
 120            ZYWRLE_SAVE_COEFF(buf, v, y, u);
 121            buf++;
 122            data++;
 123        }
 124        data += scanline - width;
 125    }
 126}
 127
 128static ZRLE_PIXEL *ZYWRLE_ANALYZE(ZRLE_PIXEL *dst, ZRLE_PIXEL *src,
 129                                  int w, int h, int scanline, int level,
 130                                  int *buf) {
 131    int l;
 132    int uw = w;
 133    int uh = h;
 134    int *top;
 135    int *end;
 136    int *line;
 137    ZRLE_PIXEL *p;
 138    int r, g, b;
 139    int s;
 140    int *ph;
 141
 142    zywrle_calc_size(&w, &h, level);
 143
 144    if (w == 0 || h == 0) {
 145        return NULL;
 146    }
 147    uw -= w;
 148    uh -= h;
 149
 150    p = dst;
 151    ZYWRLE_LOAD_UNALIGN(src,*(ZRLE_PIXEL*)top = *p;);
 152    ZYWRLE_RGBYUV(buf, src, w, h, scanline);
 153    wavelet(buf, w, h, level);
 154    for (l = 0; l < level; l++) {
 155        ZYWRLE_PACK_COEFF(buf, dst, 3, w, h, scanline, l);
 156        ZYWRLE_PACK_COEFF(buf, dst, 2, w, h, scanline, l);
 157        ZYWRLE_PACK_COEFF(buf, dst, 1, w, h, scanline, l);
 158        if (l == level - 1) {
 159            ZYWRLE_PACK_COEFF(buf, dst, 0, w, h, scanline, l);
 160        }
 161    }
 162    ZYWRLE_SAVE_UNALIGN(dst,*dst = *(ZRLE_PIXEL*)top;);
 163    return dst;
 164}
 165#endif  /* ZRLE_COMPACT_PIXEL */
 166
 167#undef ZYWRLE_RGBYUV
 168#undef ZYWRLE_YUVRGB
 169#undef ZYWRLE_LOAD_PIXEL
 170#undef ZYWRLE_SAVE_PIXEL
 171