1 /*
2 * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image decoder
3 * Copyright (c) 2007, 2008 Ivo van Poorten
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
29
32 {
33 const uint8_t *buf = avpkt->
data;
34 const uint8_t *buf_end = avpkt->
data + avpkt->
size;
35 unsigned int w,
h, depth,
type, maptype, maplength,
stride, x, y,
len, alen;
36 uint8_t *ptr, *ptr2 =
NULL;
37 const uint8_t *bufstart = buf;
39
42
46 }
47
54 buf += 32;
55
59 }
63 }
67 }
71 }
72
76 }
77
78 switch (depth) {
79 case 1:
81 break;
82 case 4:
84 break;
85 case 8:
87 break;
88 case 24:
90 break;
91 case 32:
93 break;
94 default:
97 }
98
102
103 /* scanlines are aligned on 16 bit boundaries */
104 len = (depth *
w + 7) >> 3;
106
107 if (buf_end - buf < maplength + (
len *
h) * 3 / 256)
109
112
114
115 if (depth > 8 && maplength) {
116 av_log(avctx,
AV_LOG_WARNING,
"useless colormap found or file is corrupted, trying to recover\n");
117
118 } else if (maplength) {
119 unsigned int len = maplength / 3;
120
121 if (maplength % 3 || maplength > 768) {
124 }
125
127 for (x = 0; x <
len; x++, ptr += 4)
128 *(uint32_t *)ptr = (0xFF
U<<24) + (buf[x]<<16) + (buf[
len+x]<<8) + buf[
len+
len+x];
129 }
130
131 buf += maplength;
132
133 if (maplength && depth < 8) {
135 if (!ptr)
137 stride = (
w + 15 >> 3) * depth;
138 } else {
141 }
142
145 uint8_t *end = ptr +
h *
stride;
146
147 x = 0;
148 while (ptr != end && buf < buf_end) {
150 if (buf_end - buf < 1)
152
157 }
161 if (++x >= alen) {
162 x = 0;
164 if (ptr == end)
165 break;
166 }
167 }
168 }
169 } else {
170 for (y = 0; y <
h; y++) {
171 if (buf_end - buf < alen)
172 break;
173 memcpy(ptr, buf,
len);
175 buf += alen;
176 }
177 }
179 uint8_t *ptr_free = ptr2;
181 for (y=0; y<
h; y++) {
182 for (x = 0; x < (
w + 7 >> 3) * depth; x++) {
183 if (depth == 1) {
184 ptr[8*x] = ptr2[x] >> 7;
185 ptr[8*x+1] = ptr2[x] >> 6 & 1;
186 ptr[8*x+2] = ptr2[x] >> 5 & 1;
187 ptr[8*x+3] = ptr2[x] >> 4 & 1;
188 ptr[8*x+4] = ptr2[x] >> 3 & 1;
189 ptr[8*x+5] = ptr2[x] >> 2 & 1;
190 ptr[8*x+6] = ptr2[x] >> 1 & 1;
191 ptr[8*x+7] = ptr2[x] & 1;
192 } else {
193 ptr[2*x] = ptr2[x] >> 4;
194 ptr[2*x+1] = ptr2[x] & 0xF;
195 }
196 }
198 ptr2 += (
w + 15 >> 3) * depth;
199 }
201 }
202
203 *got_frame = 1;
204
205 return buf - bufstart;
206 }
207
215 };