FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/qtpalette.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 45 48 93.8%
Functions: 1 1 100.0%
Branches: 31 38 81.6%

Line Branch Exec Source
1 /*
2 * QuickTime palette handling
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 * Copyright (c) 2015 Mats Peterson
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #include <stdio.h>
25 #include <stdint.h>
26
27 #include "libavcodec/codec_id.h"
28 #include "avio.h"
29 #include "qtpalette.h"
30
31 static const uint8_t qt_default_palette_2[2 * 3] = {
32 0xFF, 0xFF, 0xFF,
33 0x00, 0x00, 0x00
34 };
35
36 /* From a screenshot of the "Monitors & Sound" control panel in Mac OS 7.5.5 */
37 static const uint8_t qt_default_palette_4[4 * 3] = {
38 0xFF, 0xFF, 0xFF,
39 0xAC, 0xAC, 0xAC,
40 0x55, 0x55, 0x55,
41 0x00, 0x00, 0x00
42 };
43
44 /* From a screenshot of the "Monitors & Sound" control panel in Mac OS 7.5.5 */
45 static const uint8_t qt_default_palette_16[16 * 3] = {
46 0xFF, 0xFF, 0xFF,
47 0xFC, 0xF3, 0x05,
48 0xFF, 0x64, 0x02,
49 0xDD, 0x08, 0x06,
50 0xF2, 0x08, 0x84,
51 0x46, 0x00, 0xA5,
52 0x00, 0x00, 0xD4,
53 0x02, 0xAB, 0xEA,
54 0x1F, 0xB7, 0x14,
55 0x00, 0x64, 0x11,
56 0x56, 0x2C, 0x05,
57 0x90, 0x71, 0x3A,
58 0xC0, 0xC0, 0xC0,
59 0x80, 0x80, 0x80,
60 0x40, 0x40, 0x40,
61 0x00, 0x00, 0x00
62 };
63
64 static const uint8_t qt_default_palette_256[256 * 3] = {
65 /* 0, 0x00 */ 0xFF, 0xFF, 0xFF,
66 /* 1, 0x01 */ 0xFF, 0xFF, 0xCC,
67 /* 2, 0x02 */ 0xFF, 0xFF, 0x99,
68 /* 3, 0x03 */ 0xFF, 0xFF, 0x66,
69 /* 4, 0x04 */ 0xFF, 0xFF, 0x33,
70 /* 5, 0x05 */ 0xFF, 0xFF, 0x00,
71 /* 6, 0x06 */ 0xFF, 0xCC, 0xFF,
72 /* 7, 0x07 */ 0xFF, 0xCC, 0xCC,
73 /* 8, 0x08 */ 0xFF, 0xCC, 0x99,
74 /* 9, 0x09 */ 0xFF, 0xCC, 0x66,
75 /* 10, 0x0A */ 0xFF, 0xCC, 0x33,
76 /* 11, 0x0B */ 0xFF, 0xCC, 0x00,
77 /* 12, 0x0C */ 0xFF, 0x99, 0xFF,
78 /* 13, 0x0D */ 0xFF, 0x99, 0xCC,
79 /* 14, 0x0E */ 0xFF, 0x99, 0x99,
80 /* 15, 0x0F */ 0xFF, 0x99, 0x66,
81 /* 16, 0x10 */ 0xFF, 0x99, 0x33,
82 /* 17, 0x11 */ 0xFF, 0x99, 0x00,
83 /* 18, 0x12 */ 0xFF, 0x66, 0xFF,
84 /* 19, 0x13 */ 0xFF, 0x66, 0xCC,
85 /* 20, 0x14 */ 0xFF, 0x66, 0x99,
86 /* 21, 0x15 */ 0xFF, 0x66, 0x66,
87 /* 22, 0x16 */ 0xFF, 0x66, 0x33,
88 /* 23, 0x17 */ 0xFF, 0x66, 0x00,
89 /* 24, 0x18 */ 0xFF, 0x33, 0xFF,
90 /* 25, 0x19 */ 0xFF, 0x33, 0xCC,
91 /* 26, 0x1A */ 0xFF, 0x33, 0x99,
92 /* 27, 0x1B */ 0xFF, 0x33, 0x66,
93 /* 28, 0x1C */ 0xFF, 0x33, 0x33,
94 /* 29, 0x1D */ 0xFF, 0x33, 0x00,
95 /* 30, 0x1E */ 0xFF, 0x00, 0xFF,
96 /* 31, 0x1F */ 0xFF, 0x00, 0xCC,
97 /* 32, 0x20 */ 0xFF, 0x00, 0x99,
98 /* 33, 0x21 */ 0xFF, 0x00, 0x66,
99 /* 34, 0x22 */ 0xFF, 0x00, 0x33,
100 /* 35, 0x23 */ 0xFF, 0x00, 0x00,
101 /* 36, 0x24 */ 0xCC, 0xFF, 0xFF,
102 /* 37, 0x25 */ 0xCC, 0xFF, 0xCC,
103 /* 38, 0x26 */ 0xCC, 0xFF, 0x99,
104 /* 39, 0x27 */ 0xCC, 0xFF, 0x66,
105 /* 40, 0x28 */ 0xCC, 0xFF, 0x33,
106 /* 41, 0x29 */ 0xCC, 0xFF, 0x00,
107 /* 42, 0x2A */ 0xCC, 0xCC, 0xFF,
108 /* 43, 0x2B */ 0xCC, 0xCC, 0xCC,
109 /* 44, 0x2C */ 0xCC, 0xCC, 0x99,
110 /* 45, 0x2D */ 0xCC, 0xCC, 0x66,
111 /* 46, 0x2E */ 0xCC, 0xCC, 0x33,
112 /* 47, 0x2F */ 0xCC, 0xCC, 0x00,
113 /* 48, 0x30 */ 0xCC, 0x99, 0xFF,
114 /* 49, 0x31 */ 0xCC, 0x99, 0xCC,
115 /* 50, 0x32 */ 0xCC, 0x99, 0x99,
116 /* 51, 0x33 */ 0xCC, 0x99, 0x66,
117 /* 52, 0x34 */ 0xCC, 0x99, 0x33,
118 /* 53, 0x35 */ 0xCC, 0x99, 0x00,
119 /* 54, 0x36 */ 0xCC, 0x66, 0xFF,
120 /* 55, 0x37 */ 0xCC, 0x66, 0xCC,
121 /* 56, 0x38 */ 0xCC, 0x66, 0x99,
122 /* 57, 0x39 */ 0xCC, 0x66, 0x66,
123 /* 58, 0x3A */ 0xCC, 0x66, 0x33,
124 /* 59, 0x3B */ 0xCC, 0x66, 0x00,
125 /* 60, 0x3C */ 0xCC, 0x33, 0xFF,
126 /* 61, 0x3D */ 0xCC, 0x33, 0xCC,
127 /* 62, 0x3E */ 0xCC, 0x33, 0x99,
128 /* 63, 0x3F */ 0xCC, 0x33, 0x66,
129 /* 64, 0x40 */ 0xCC, 0x33, 0x33,
130 /* 65, 0x41 */ 0xCC, 0x33, 0x00,
131 /* 66, 0x42 */ 0xCC, 0x00, 0xFF,
132 /* 67, 0x43 */ 0xCC, 0x00, 0xCC,
133 /* 68, 0x44 */ 0xCC, 0x00, 0x99,
134 /* 69, 0x45 */ 0xCC, 0x00, 0x66,
135 /* 70, 0x46 */ 0xCC, 0x00, 0x33,
136 /* 71, 0x47 */ 0xCC, 0x00, 0x00,
137 /* 72, 0x48 */ 0x99, 0xFF, 0xFF,
138 /* 73, 0x49 */ 0x99, 0xFF, 0xCC,
139 /* 74, 0x4A */ 0x99, 0xFF, 0x99,
140 /* 75, 0x4B */ 0x99, 0xFF, 0x66,
141 /* 76, 0x4C */ 0x99, 0xFF, 0x33,
142 /* 77, 0x4D */ 0x99, 0xFF, 0x00,
143 /* 78, 0x4E */ 0x99, 0xCC, 0xFF,
144 /* 79, 0x4F */ 0x99, 0xCC, 0xCC,
145 /* 80, 0x50 */ 0x99, 0xCC, 0x99,
146 /* 81, 0x51 */ 0x99, 0xCC, 0x66,
147 /* 82, 0x52 */ 0x99, 0xCC, 0x33,
148 /* 83, 0x53 */ 0x99, 0xCC, 0x00,
149 /* 84, 0x54 */ 0x99, 0x99, 0xFF,
150 /* 85, 0x55 */ 0x99, 0x99, 0xCC,
151 /* 86, 0x56 */ 0x99, 0x99, 0x99,
152 /* 87, 0x57 */ 0x99, 0x99, 0x66,
153 /* 88, 0x58 */ 0x99, 0x99, 0x33,
154 /* 89, 0x59 */ 0x99, 0x99, 0x00,
155 /* 90, 0x5A */ 0x99, 0x66, 0xFF,
156 /* 91, 0x5B */ 0x99, 0x66, 0xCC,
157 /* 92, 0x5C */ 0x99, 0x66, 0x99,
158 /* 93, 0x5D */ 0x99, 0x66, 0x66,
159 /* 94, 0x5E */ 0x99, 0x66, 0x33,
160 /* 95, 0x5F */ 0x99, 0x66, 0x00,
161 /* 96, 0x60 */ 0x99, 0x33, 0xFF,
162 /* 97, 0x61 */ 0x99, 0x33, 0xCC,
163 /* 98, 0x62 */ 0x99, 0x33, 0x99,
164 /* 99, 0x63 */ 0x99, 0x33, 0x66,
165 /* 100, 0x64 */ 0x99, 0x33, 0x33,
166 /* 101, 0x65 */ 0x99, 0x33, 0x00,
167 /* 102, 0x66 */ 0x99, 0x00, 0xFF,
168 /* 103, 0x67 */ 0x99, 0x00, 0xCC,
169 /* 104, 0x68 */ 0x99, 0x00, 0x99,
170 /* 105, 0x69 */ 0x99, 0x00, 0x66,
171 /* 106, 0x6A */ 0x99, 0x00, 0x33,
172 /* 107, 0x6B */ 0x99, 0x00, 0x00,
173 /* 108, 0x6C */ 0x66, 0xFF, 0xFF,
174 /* 109, 0x6D */ 0x66, 0xFF, 0xCC,
175 /* 110, 0x6E */ 0x66, 0xFF, 0x99,
176 /* 111, 0x6F */ 0x66, 0xFF, 0x66,
177 /* 112, 0x70 */ 0x66, 0xFF, 0x33,
178 /* 113, 0x71 */ 0x66, 0xFF, 0x00,
179 /* 114, 0x72 */ 0x66, 0xCC, 0xFF,
180 /* 115, 0x73 */ 0x66, 0xCC, 0xCC,
181 /* 116, 0x74 */ 0x66, 0xCC, 0x99,
182 /* 117, 0x75 */ 0x66, 0xCC, 0x66,
183 /* 118, 0x76 */ 0x66, 0xCC, 0x33,
184 /* 119, 0x77 */ 0x66, 0xCC, 0x00,
185 /* 120, 0x78 */ 0x66, 0x99, 0xFF,
186 /* 121, 0x79 */ 0x66, 0x99, 0xCC,
187 /* 122, 0x7A */ 0x66, 0x99, 0x99,
188 /* 123, 0x7B */ 0x66, 0x99, 0x66,
189 /* 124, 0x7C */ 0x66, 0x99, 0x33,
190 /* 125, 0x7D */ 0x66, 0x99, 0x00,
191 /* 126, 0x7E */ 0x66, 0x66, 0xFF,
192 /* 127, 0x7F */ 0x66, 0x66, 0xCC,
193 /* 128, 0x80 */ 0x66, 0x66, 0x99,
194 /* 129, 0x81 */ 0x66, 0x66, 0x66,
195 /* 130, 0x82 */ 0x66, 0x66, 0x33,
196 /* 131, 0x83 */ 0x66, 0x66, 0x00,
197 /* 132, 0x84 */ 0x66, 0x33, 0xFF,
198 /* 133, 0x85 */ 0x66, 0x33, 0xCC,
199 /* 134, 0x86 */ 0x66, 0x33, 0x99,
200 /* 135, 0x87 */ 0x66, 0x33, 0x66,
201 /* 136, 0x88 */ 0x66, 0x33, 0x33,
202 /* 137, 0x89 */ 0x66, 0x33, 0x00,
203 /* 138, 0x8A */ 0x66, 0x00, 0xFF,
204 /* 139, 0x8B */ 0x66, 0x00, 0xCC,
205 /* 140, 0x8C */ 0x66, 0x00, 0x99,
206 /* 141, 0x8D */ 0x66, 0x00, 0x66,
207 /* 142, 0x8E */ 0x66, 0x00, 0x33,
208 /* 143, 0x8F */ 0x66, 0x00, 0x00,
209 /* 144, 0x90 */ 0x33, 0xFF, 0xFF,
210 /* 145, 0x91 */ 0x33, 0xFF, 0xCC,
211 /* 146, 0x92 */ 0x33, 0xFF, 0x99,
212 /* 147, 0x93 */ 0x33, 0xFF, 0x66,
213 /* 148, 0x94 */ 0x33, 0xFF, 0x33,
214 /* 149, 0x95 */ 0x33, 0xFF, 0x00,
215 /* 150, 0x96 */ 0x33, 0xCC, 0xFF,
216 /* 151, 0x97 */ 0x33, 0xCC, 0xCC,
217 /* 152, 0x98 */ 0x33, 0xCC, 0x99,
218 /* 153, 0x99 */ 0x33, 0xCC, 0x66,
219 /* 154, 0x9A */ 0x33, 0xCC, 0x33,
220 /* 155, 0x9B */ 0x33, 0xCC, 0x00,
221 /* 156, 0x9C */ 0x33, 0x99, 0xFF,
222 /* 157, 0x9D */ 0x33, 0x99, 0xCC,
223 /* 158, 0x9E */ 0x33, 0x99, 0x99,
224 /* 159, 0x9F */ 0x33, 0x99, 0x66,
225 /* 160, 0xA0 */ 0x33, 0x99, 0x33,
226 /* 161, 0xA1 */ 0x33, 0x99, 0x00,
227 /* 162, 0xA2 */ 0x33, 0x66, 0xFF,
228 /* 163, 0xA3 */ 0x33, 0x66, 0xCC,
229 /* 164, 0xA4 */ 0x33, 0x66, 0x99,
230 /* 165, 0xA5 */ 0x33, 0x66, 0x66,
231 /* 166, 0xA6 */ 0x33, 0x66, 0x33,
232 /* 167, 0xA7 */ 0x33, 0x66, 0x00,
233 /* 168, 0xA8 */ 0x33, 0x33, 0xFF,
234 /* 169, 0xA9 */ 0x33, 0x33, 0xCC,
235 /* 170, 0xAA */ 0x33, 0x33, 0x99,
236 /* 171, 0xAB */ 0x33, 0x33, 0x66,
237 /* 172, 0xAC */ 0x33, 0x33, 0x33,
238 /* 173, 0xAD */ 0x33, 0x33, 0x00,
239 /* 174, 0xAE */ 0x33, 0x00, 0xFF,
240 /* 175, 0xAF */ 0x33, 0x00, 0xCC,
241 /* 176, 0xB0 */ 0x33, 0x00, 0x99,
242 /* 177, 0xB1 */ 0x33, 0x00, 0x66,
243 /* 178, 0xB2 */ 0x33, 0x00, 0x33,
244 /* 179, 0xB3 */ 0x33, 0x00, 0x00,
245 /* 180, 0xB4 */ 0x00, 0xFF, 0xFF,
246 /* 181, 0xB5 */ 0x00, 0xFF, 0xCC,
247 /* 182, 0xB6 */ 0x00, 0xFF, 0x99,
248 /* 183, 0xB7 */ 0x00, 0xFF, 0x66,
249 /* 184, 0xB8 */ 0x00, 0xFF, 0x33,
250 /* 185, 0xB9 */ 0x00, 0xFF, 0x00,
251 /* 186, 0xBA */ 0x00, 0xCC, 0xFF,
252 /* 187, 0xBB */ 0x00, 0xCC, 0xCC,
253 /* 188, 0xBC */ 0x00, 0xCC, 0x99,
254 /* 189, 0xBD */ 0x00, 0xCC, 0x66,
255 /* 190, 0xBE */ 0x00, 0xCC, 0x33,
256 /* 191, 0xBF */ 0x00, 0xCC, 0x00,
257 /* 192, 0xC0 */ 0x00, 0x99, 0xFF,
258 /* 193, 0xC1 */ 0x00, 0x99, 0xCC,
259 /* 194, 0xC2 */ 0x00, 0x99, 0x99,
260 /* 195, 0xC3 */ 0x00, 0x99, 0x66,
261 /* 196, 0xC4 */ 0x00, 0x99, 0x33,
262 /* 197, 0xC5 */ 0x00, 0x99, 0x00,
263 /* 198, 0xC6 */ 0x00, 0x66, 0xFF,
264 /* 199, 0xC7 */ 0x00, 0x66, 0xCC,
265 /* 200, 0xC8 */ 0x00, 0x66, 0x99,
266 /* 201, 0xC9 */ 0x00, 0x66, 0x66,
267 /* 202, 0xCA */ 0x00, 0x66, 0x33,
268 /* 203, 0xCB */ 0x00, 0x66, 0x00,
269 /* 204, 0xCC */ 0x00, 0x33, 0xFF,
270 /* 205, 0xCD */ 0x00, 0x33, 0xCC,
271 /* 206, 0xCE */ 0x00, 0x33, 0x99,
272 /* 207, 0xCF */ 0x00, 0x33, 0x66,
273 /* 208, 0xD0 */ 0x00, 0x33, 0x33,
274 /* 209, 0xD1 */ 0x00, 0x33, 0x00,
275 /* 210, 0xD2 */ 0x00, 0x00, 0xFF,
276 /* 211, 0xD3 */ 0x00, 0x00, 0xCC,
277 /* 212, 0xD4 */ 0x00, 0x00, 0x99,
278 /* 213, 0xD5 */ 0x00, 0x00, 0x66,
279 /* 214, 0xD6 */ 0x00, 0x00, 0x33,
280 /* 215, 0xD7 */ 0xEE, 0x00, 0x00,
281 /* 216, 0xD8 */ 0xDD, 0x00, 0x00,
282 /* 217, 0xD9 */ 0xBB, 0x00, 0x00,
283 /* 218, 0xDA */ 0xAA, 0x00, 0x00,
284 /* 219, 0xDB */ 0x88, 0x00, 0x00,
285 /* 220, 0xDC */ 0x77, 0x00, 0x00,
286 /* 221, 0xDD */ 0x55, 0x00, 0x00,
287 /* 222, 0xDE */ 0x44, 0x00, 0x00,
288 /* 223, 0xDF */ 0x22, 0x00, 0x00,
289 /* 224, 0xE0 */ 0x11, 0x00, 0x00,
290 /* 225, 0xE1 */ 0x00, 0xEE, 0x00,
291 /* 226, 0xE2 */ 0x00, 0xDD, 0x00,
292 /* 227, 0xE3 */ 0x00, 0xBB, 0x00,
293 /* 228, 0xE4 */ 0x00, 0xAA, 0x00,
294 /* 229, 0xE5 */ 0x00, 0x88, 0x00,
295 /* 230, 0xE6 */ 0x00, 0x77, 0x00,
296 /* 231, 0xE7 */ 0x00, 0x55, 0x00,
297 /* 232, 0xE8 */ 0x00, 0x44, 0x00,
298 /* 233, 0xE9 */ 0x00, 0x22, 0x00,
299 /* 234, 0xEA */ 0x00, 0x11, 0x00,
300 /* 235, 0xEB */ 0x00, 0x00, 0xEE,
301 /* 236, 0xEC */ 0x00, 0x00, 0xDD,
302 /* 237, 0xED */ 0x00, 0x00, 0xBB,
303 /* 238, 0xEE */ 0x00, 0x00, 0xAA,
304 /* 239, 0xEF */ 0x00, 0x00, 0x88,
305 /* 240, 0xF0 */ 0x00, 0x00, 0x77,
306 /* 241, 0xF1 */ 0x00, 0x00, 0x55,
307 /* 242, 0xF2 */ 0x00, 0x00, 0x44,
308 /* 243, 0xF3 */ 0x00, 0x00, 0x22,
309 /* 244, 0xF4 */ 0x00, 0x00, 0x11,
310 /* 245, 0xF5 */ 0xEE, 0xEE, 0xEE,
311 /* 246, 0xF6 */ 0xDD, 0xDD, 0xDD,
312 /* 247, 0xF7 */ 0xBB, 0xBB, 0xBB,
313 /* 248, 0xF8 */ 0xAA, 0xAA, 0xAA,
314 /* 249, 0xF9 */ 0x88, 0x88, 0x88,
315 /* 250, 0xFA */ 0x77, 0x77, 0x77,
316 /* 251, 0xFB */ 0x55, 0x55, 0x55,
317 /* 252, 0xFC */ 0x44, 0x44, 0x44,
318 /* 253, 0xFD */ 0x22, 0x22, 0x22,
319 /* 254, 0xFE */ 0x11, 0x11, 0x11,
320 /* 255, 0xFF */ 0x00, 0x00, 0x00
321 };
322
323 272 int ff_get_qtpalette(int codec_id, AVIOContext *pb, uint32_t *palette)
324 {
325 int tmp, bit_depth, color_table_id, greyscale, i;
326
327 272 avio_seek(pb, 82, SEEK_CUR);
328
329 /* Get the bit depth and greyscale state */
330 272 tmp = avio_rb16(pb);
331 272 bit_depth = tmp & 0x1F;
332 272 greyscale = tmp & 0x20;
333
334 /* Get the color table ID */
335 272 color_table_id = avio_rb16(pb);
336
337 /* Do not create a greyscale palette for Cinepak */
338
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272 if (greyscale && codec_id == AV_CODEC_ID_CINEPAK)
339 return 0;
340
341 /* If the depth is 1, 2, 4, or 8 bpp, file is palettized. */
342
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272 if ((bit_depth == 1 || bit_depth == 2 || bit_depth == 4 || bit_depth == 8)) {
343 uint32_t color_count, color_start, color_end;
344 uint32_t r, g, b;
345
346 /* Ignore the greyscale bit for 1-bit video and sample
347 * descriptions containing a color table. */
348
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21 if (greyscale && bit_depth > 1 && color_table_id) {
349 int color_index, color_dec;
350 /* compute the greyscale palette */
351 7 color_count = 1 << bit_depth;
352 7 color_index = 255;
353 7 color_dec = 256 / (color_count - 1);
354
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827 for (i = 0; i < color_count; i++) {
355 820 r = g = b = color_index;
356 820 palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
357 820 color_index -= color_dec;
358
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820 if (color_index < 0)
359 7 color_index = 0;
360 }
361
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7 } else if (color_table_id) {
362 /* The color table ID is non-zero. Interpret this as
363 * being -1, which means use the default Macintosh
364 * color table */
365 const uint8_t *color_table;
366 4 color_count = 1 << bit_depth;
367
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4 if (bit_depth == 1)
368 1 color_table = qt_default_palette_2;
369
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3 else if (bit_depth == 2)
370 color_table = qt_default_palette_4;
371
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3 else if (bit_depth == 4)
372 color_table = qt_default_palette_16;
373 else
374 3 color_table = qt_default_palette_256;
375
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774 for (i = 0; i < color_count; i++) {
376 770 r = color_table[i * 3 + 0];
377 770 g = color_table[i * 3 + 1];
378 770 b = color_table[i * 3 + 2];
379 770 palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
380 }
381 } else {
382 /* The color table ID is 0; the color table is in the sample
383 * description */
384 3 color_start = avio_rb32(pb);
385 3 avio_rb16(pb); /* color table flags */
386 3 color_end = avio_rb16(pb);
387
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3 if ((color_start <= 255) && (color_end <= 255)) {
388
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531 for (i = color_start; i <= color_end; i++) {
389 /* Each color is made of four unsigned 16 bit integers. The
390 * first integer is 0, the remaining integers are the red,
391 * the green and the blue values. We only use the top 8 bit. */
392 528 avio_skip(pb, 2);
393 528 r = avio_r8(pb);
394 528 avio_r8(pb);
395 528 g = avio_r8(pb);
396 528 avio_r8(pb);
397 528 b = avio_r8(pb);
398 528 avio_r8(pb);
399 528 palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | (b);
400 }
401 }
402 }
403
404 14 return 1;
405 }
406
407 258 return 0;
408 }
409