Statistics
| Branch: | Revision:

root / ui / vnc-enc-zywrle-template.c @ 148954fa

History | View | Annotate | Download (5.7 kB)

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