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Annotation of qemu/ui/vnc-enc-zywrle-template.c, revision 1.1

1.1     ! root        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 & Developement Center)               *
        !            13:  *                                                                  *
        !            14:  *                                                                  *
        !            15:  ********************************************************************
        !            16: Redistribution and use in source and binary forms, with or without
        !            17: modification, are permitted provided that the following conditions
        !            18: are met:
        !            19: 
        !            20: - Redistributions of source code must retain the above copyright
        !            21: notice, this list of conditions and the following disclaimer.
        !            22: 
        !            23: - Redistributions in binary form must reproduce the above copyright
        !            24: notice, this list of conditions and the following disclaimer in the
        !            25: documentation and/or other materials provided with the distribution.
        !            26: 
        !            27: - Neither the name of the Hitachi Systems & Services, Ltd. nor
        !            28: the names of its contributors may be used to endorse or promote
        !            29: products derived from this software without specific prior written
        !            30: permission.
        !            31: 
        !            32: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
        !            33: ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
        !            34: LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
        !            35: A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION
        !            36: OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
        !            37: SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
        !            38: LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            39: DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            40: THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            41: (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
        !            42: OF 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
        !           106: static 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: 
        !           128: static 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

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