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 | ******************************************************************** |
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 "qemu/osdep.h" |
104 | #include "vnc-enc-zywrle.h" |
105 | |
106 | #ifndef ZRLE_COMPACT_PIXEL |
107 | static 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 | |
129 | static 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 | |