2 * LucasArts Smush video decoder
3 * Copyright (c) 2006 Cyril Zorin
4 * Copyright (c) 2011 Konstantin Shishkov
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/avassert.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/imgutils.h"
28 #include "bytestream.h"
29 #include "copy_block.h"
33 #define GLYPH_COORD_VECT_SIZE 16
34 #define PALETTE_SIZE 256
35 #define PALETTE_DELTA 768
37 static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = {
38 0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1
41 static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = {
42 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2
45 static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = {
46 0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0
49 static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = {
50 0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1
53 static const int8_t motion_vectors[256][2] = {
54 { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 },
55 { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 },
56 { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 },
57 { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 },
58 { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 },
59 { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 },
60 { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 },
61 { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 },
62 { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 },
63 { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 },
64 { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 },
65 { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 },
66 { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 },
67 { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 },
68 { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 },
69 { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 },
70 { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 },
71 { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 },
72 { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 },
73 { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 },
74 { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 },
75 { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 },
76 { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 },
77 { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 },
78 { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 },
79 { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 },
80 { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 },
81 { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 },
82 { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 },
83 { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 },
84 { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 },
85 { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 },
86 { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 },
87 { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 },
88 { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 },
89 { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 },
90 { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 },
91 { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 },
92 { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 },
93 { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 },
94 { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 },
95 { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 },
96 { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 },
97 { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 },
98 { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 },
99 { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 },
100 { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 },
101 { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 },
102 { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 },
103 { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 },
104 { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
107 static const int8_t c37_mv[] = {
108 0, 0, 1, 0, 2, 0, 3, 0, 5, 0, 8, 0, 13, 0, 21,
109 0, -1, 0, -2, 0, -3, 0, -5, 0, -8, 0, -13, 0, -17, 0,
110 -21, 0, 0, 1, 1, 1, 2, 1, 3, 1, 5, 1, 8, 1, 13,
111 1, 21, 1, -1, 1, -2, 1, -3, 1, -5, 1, -8, 1, -13, 1,
112 -17, 1, -21, 1, 0, 2, 1, 2, 2, 2, 3, 2, 5, 2, 8,
113 2, 13, 2, 21, 2, -1, 2, -2, 2, -3, 2, -5, 2, -8, 2,
114 -13, 2, -17, 2, -21, 2, 0, 3, 1, 3, 2, 3, 3, 3, 5,
115 3, 8, 3, 13, 3, 21, 3, -1, 3, -2, 3, -3, 3, -5, 3,
116 -8, 3, -13, 3, -17, 3, -21, 3, 0, 5, 1, 5, 2, 5, 3,
117 5, 5, 5, 8, 5, 13, 5, 21, 5, -1, 5, -2, 5, -3, 5,
118 -5, 5, -8, 5, -13, 5, -17, 5, -21, 5, 0, 8, 1, 8, 2,
119 8, 3, 8, 5, 8, 8, 8, 13, 8, 21, 8, -1, 8, -2, 8,
120 -3, 8, -5, 8, -8, 8, -13, 8, -17, 8, -21, 8, 0, 13, 1,
121 13, 2, 13, 3, 13, 5, 13, 8, 13, 13, 13, 21, 13, -1, 13,
122 -2, 13, -3, 13, -5, 13, -8, 13, -13, 13, -17, 13, -21, 13, 0,
123 21, 1, 21, 2, 21, 3, 21, 5, 21, 8, 21, 13, 21, 21, 21,
124 -1, 21, -2, 21, -3, 21, -5, 21, -8, 21, -13, 21, -17, 21, -21,
125 21, 0, -1, 1, -1, 2, -1, 3, -1, 5, -1, 8, -1, 13, -1,
126 21, -1, -1, -1, -2, -1, -3, -1, -5, -1, -8, -1, -13, -1, -17,
127 -1, -21, -1, 0, -2, 1, -2, 2, -2, 3, -2, 5, -2, 8, -2,
128 13, -2, 21, -2, -1, -2, -2, -2, -3, -2, -5, -2, -8, -2, -13,
129 -2, -17, -2, -21, -2, 0, -3, 1, -3, 2, -3, 3, -3, 5, -3,
130 8, -3, 13, -3, 21, -3, -1, -3, -2, -3, -3, -3, -5, -3, -8,
131 -3, -13, -3, -17, -3, -21, -3, 0, -5, 1, -5, 2, -5, 3, -5,
132 5, -5, 8, -5, 13, -5, 21, -5, -1, -5, -2, -5, -3, -5, -5,
133 -5, -8, -5, -13, -5, -17, -5, -21, -5, 0, -8, 1, -8, 2, -8,
134 3, -8, 5, -8, 8, -8, 13, -8, 21, -8, -1, -8, -2, -8, -3,
135 -8, -5, -8, -8, -8, -13, -8, -17, -8, -21, -8, 0, -13, 1, -13,
136 2, -13, 3, -13, 5, -13, 8, -13, 13, -13, 21, -13, -1, -13, -2,
137 -13, -3, -13, -5, -13, -8, -13, -13, -13, -17, -13, -21, -13, 0, -17,
138 1, -17, 2, -17, 3, -17, 5, -17, 8, -17, 13, -17, 21, -17, -1,
139 -17, -2, -17, -3, -17, -5, -17, -8, -17, -13, -17, -17, -17, -21, -17,
140 0, -21, 1, -21, 2, -21, 3, -21, 5, -21, 8, -21, 13, -21, 21,
141 -21, -1, -21, -2, -21, -3, -21, -5, -21, -8, -21, -13, -21, -17, -21,
142 0, 0, -8, -29, 8, -29, -18, -25, 17, -25, 0, -23, -6, -22, 6,
143 -22, -13, -19, 12, -19, 0, -18, 25, -18, -25, -17, -5, -17, 5, -17,
144 -10, -15, 10, -15, 0, -14, -4, -13, 4, -13, 19, -13, -19, -12, -8,
145 -11, -2, -11, 0, -11, 2, -11, 8, -11, -15, -10, -4, -10, 4, -10,
146 15, -10, -6, -9, -1, -9, 1, -9, 6, -9, -29, -8, -11, -8, -8,
147 -8, -3, -8, 3, -8, 8, -8, 11, -8, 29, -8, -5, -7, -2, -7,
148 0, -7, 2, -7, 5, -7, -22, -6, -9, -6, -6, -6, -3, -6, -1,
149 -6, 1, -6, 3, -6, 6, -6, 9, -6, 22, -6, -17, -5, -7, -5,
150 -4, -5, -2, -5, 0, -5, 2, -5, 4, -5, 7, -5, 17, -5, -13,
151 -4, -10, -4, -5, -4, -3, -4, -1, -4, 0, -4, 1, -4, 3, -4,
152 5, -4, 10, -4, 13, -4, -8, -3, -6, -3, -4, -3, -3, -3, -2,
153 -3, -1, -3, 0, -3, 1, -3, 2, -3, 4, -3, 6, -3, 8, -3,
154 -11, -2, -7, -2, -5, -2, -3, -2, -2, -2, -1, -2, 0, -2, 1,
155 -2, 2, -2, 3, -2, 5, -2, 7, -2, 11, -2, -9, -1, -6, -1,
156 -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3,
157 -1, 4, -1, 6, -1, 9, -1, -31, 0, -23, 0, -18, 0, -14, 0,
158 -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, -2, 0, -1, 0, 0,
159 -31, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
160 14, 0, 18, 0, 23, 0, 31, 0, -9, 1, -6, 1, -4, 1, -3,
161 1, -2, 1, -1, 1, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
162 6, 1, 9, 1, -11, 2, -7, 2, -5, 2, -3, 2, -2, 2, -1,
163 2, 0, 2, 1, 2, 2, 2, 3, 2, 5, 2, 7, 2, 11, 2,
164 -8, 3, -6, 3, -4, 3, -2, 3, -1, 3, 0, 3, 1, 3, 2,
165 3, 3, 3, 4, 3, 6, 3, 8, 3, -13, 4, -10, 4, -5, 4,
166 -3, 4, -1, 4, 0, 4, 1, 4, 3, 4, 5, 4, 10, 4, 13,
167 4, -17, 5, -7, 5, -4, 5, -2, 5, 0, 5, 2, 5, 4, 5,
168 7, 5, 17, 5, -22, 6, -9, 6, -6, 6, -3, 6, -1, 6, 1,
169 6, 3, 6, 6, 6, 9, 6, 22, 6, -5, 7, -2, 7, 0, 7,
170 2, 7, 5, 7, -29, 8, -11, 8, -8, 8, -3, 8, 3, 8, 8,
171 8, 11, 8, 29, 8, -6, 9, -1, 9, 1, 9, 6, 9, -15, 10,
172 -4, 10, 4, 10, 15, 10, -8, 11, -2, 11, 0, 11, 2, 11, 8,
173 11, 19, 12, -19, 13, -4, 13, 4, 13, 0, 14, -10, 15, 10, 15,
174 -5, 17, 5, 17, 25, 17, -25, 18, 0, 18, -12, 19, 13, 19, -6,
175 22, 6, 22, 0, 23, -17, 25, 18, 25, -8, 29, 8, 29, 0, 31,
176 0, 0, -6, -22, 6, -22, -13, -19, 12, -19, 0, -18, -5, -17, 5,
177 -17, -10, -15, 10, -15, 0, -14, -4, -13, 4, -13, 19, -13, -19, -12,
178 -8, -11, -2, -11, 0, -11, 2, -11, 8, -11, -15, -10, -4, -10, 4,
179 -10, 15, -10, -6, -9, -1, -9, 1, -9, 6, -9, -11, -8, -8, -8,
180 -3, -8, 0, -8, 3, -8, 8, -8, 11, -8, -5, -7, -2, -7, 0,
181 -7, 2, -7, 5, -7, -22, -6, -9, -6, -6, -6, -3, -6, -1, -6,
182 1, -6, 3, -6, 6, -6, 9, -6, 22, -6, -17, -5, -7, -5, -4,
183 -5, -2, -5, -1, -5, 0, -5, 1, -5, 2, -5, 4, -5, 7, -5,
184 17, -5, -13, -4, -10, -4, -5, -4, -3, -4, -2, -4, -1, -4, 0,
185 -4, 1, -4, 2, -4, 3, -4, 5, -4, 10, -4, 13, -4, -8, -3,
186 -6, -3, -4, -3, -3, -3, -2, -3, -1, -3, 0, -3, 1, -3, 2,
187 -3, 3, -3, 4, -3, 6, -3, 8, -3, -11, -2, -7, -2, -5, -2,
188 -4, -2, -3, -2, -2, -2, -1, -2, 0, -2, 1, -2, 2, -2, 3,
189 -2, 4, -2, 5, -2, 7, -2, 11, -2, -9, -1, -6, -1, -5, -1,
190 -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, 1, -1, 2, -1, 3,
191 -1, 4, -1, 5, -1, 6, -1, 9, -1, -23, 0, -18, 0, -14, 0,
192 -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, -2, 0, -1, 0, 0,
193 -23, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
194 14, 0, 18, 0, 23, 0, -9, 1, -6, 1, -5, 1, -4, 1, -3,
195 1, -2, 1, -1, 1, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
196 5, 1, 6, 1, 9, 1, -11, 2, -7, 2, -5, 2, -4, 2, -3,
197 2, -2, 2, -1, 2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2,
198 5, 2, 7, 2, 11, 2, -8, 3, -6, 3, -4, 3, -3, 3, -2,
199 3, -1, 3, 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, 6, 3,
200 8, 3, -13, 4, -10, 4, -5, 4, -3, 4, -2, 4, -1, 4, 0,
201 4, 1, 4, 2, 4, 3, 4, 5, 4, 10, 4, 13, 4, -17, 5,
202 -7, 5, -4, 5, -2, 5, -1, 5, 0, 5, 1, 5, 2, 5, 4,
203 5, 7, 5, 17, 5, -22, 6, -9, 6, -6, 6, -3, 6, -1, 6,
204 1, 6, 3, 6, 6, 6, 9, 6, 22, 6, -5, 7, -2, 7, 0,
205 7, 2, 7, 5, 7, -11, 8, -8, 8, -3, 8, 0, 8, 3, 8,
206 8, 8, 11, 8, -6, 9, -1, 9, 1, 9, 6, 9, -15, 10, -4,
207 10, 4, 10, 15, 10, -8, 11, -2, 11, 0, 11, 2, 11, 8, 11,
208 19, 12, -19, 13, -4, 13, 4, 13, 0, 14, -10, 15, 10, 15, -5,
209 17, 5, 17, 0, 18, -12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
212 typedef struct SANMVideoContext {
213 AVCodecContext *avctx;
216 int version, subversion;
217 uint32_t pal[PALETTE_SIZE];
218 int16_t delta_pal[PALETTE_DELTA];
222 int aligned_width, aligned_height;
226 uint16_t *frm0, *frm1, *frm2;
227 uint8_t *stored_frame;
228 uint32_t frm0_size, frm1_size, frm2_size;
229 uint32_t stored_frame_size;
232 unsigned int rle_buf_size;
236 long npixels, buf_size;
238 uint16_t codebook[256];
239 uint16_t small_codebook[4];
241 int8_t p4x4glyphs[NGLYPHS][16];
242 int8_t p8x8glyphs[NGLYPHS][64];
245 typedef struct SANMFrameHeader {
246 int seq_num, codec, rotate_code, rle_output_size;
249 uint32_t width, height;
269 * Return enum GlyphEdge of box where point (x, y) lies.
271 * @param x x point coordinate
272 * @param y y point coordinate
273 * @param edge_size box width/height.
275 static enum GlyphEdge which_edge(int x, int y, int edge_size)
277 const int edge_max = edge_size - 1;
281 else if (y == edge_max)
285 else if (x == edge_max)
291 static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
293 if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) ||
294 (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) ||
295 (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) ||
296 (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE))
298 else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
299 (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE))
301 else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
302 (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE))
304 else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) ||
305 (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) ||
306 (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) ||
307 (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE))
313 /* Interpolate two points. */
314 static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
315 int pos, int npoints)
318 points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
319 points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
327 * Construct glyphs by iterating through vector coordinates.
329 * @param pglyphs pointer to table where glyphs are stored
330 * @param xvec pointer to x component of vector coordinates
331 * @param yvec pointer to y component of vector coordinates
332 * @param side_length glyph width/height.
334 static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
335 const int side_length)
337 const int glyph_size = side_length * side_length;
338 int8_t *pglyph = pglyphs;
341 for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
344 enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
346 for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
349 enum GlyphEdge edge1 = which_edge(x1, y1, side_length);
350 enum GlyphDir dir = which_direction(edge0, edge1);
351 int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0));
354 for (ipoint = 0; ipoint <= npoints; ipoint++) {
358 interp_point(point, x0, y0, x1, y1, ipoint, npoints);
362 for (irow = point[1]; irow >= 0; irow--)
363 pglyph[point[0] + irow * side_length] = 1;
367 for (irow = point[1]; irow < side_length; irow++)
368 pglyph[point[0] + irow * side_length] = 1;
372 for (icol = point[0]; icol >= 0; icol--)
373 pglyph[icol + point[1] * side_length] = 1;
377 for (icol = point[0]; icol < side_length; icol++)
378 pglyph[icol + point[1] * side_length] = 1;
386 static void init_sizes(SANMVideoContext *ctx, int width, int height)
389 ctx->height = height;
390 ctx->npixels = width * height;
392 ctx->aligned_width = FFALIGN(width, 8);
393 ctx->aligned_height = FFALIGN(height, 8);
395 ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
399 static void destroy_buffers(SANMVideoContext *ctx)
401 av_freep(&ctx->frm0);
402 av_freep(&ctx->frm1);
403 av_freep(&ctx->frm2);
404 av_freep(&ctx->stored_frame);
405 av_freep(&ctx->rle_buf);
411 static av_cold int init_buffers(SANMVideoContext *ctx)
413 av_fast_padded_malloc(&ctx->frm0, &ctx->frm0_size, ctx->buf_size);
414 av_fast_padded_malloc(&ctx->frm1, &ctx->frm1_size, ctx->buf_size);
415 av_fast_padded_malloc(&ctx->frm2, &ctx->frm2_size, ctx->buf_size);
417 av_fast_padded_malloc(&ctx->stored_frame,
418 &ctx->stored_frame_size, ctx->buf_size);
420 if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 ||
421 (!ctx->stored_frame && !ctx->version)) {
422 destroy_buffers(ctx);
423 return AVERROR(ENOMEM);
429 static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
431 if (rotate_code == 2)
432 FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
433 FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
436 static av_cold int decode_init(AVCodecContext *avctx)
438 SANMVideoContext *ctx = avctx->priv_data;
441 ctx->version = !avctx->extradata_size;
443 avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
445 init_sizes(ctx, avctx->width, avctx->height);
446 if (init_buffers(ctx)) {
447 av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n");
448 return AVERROR(ENOMEM);
451 make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
452 make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
457 if (avctx->extradata_size < 1026) {
458 av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n");
459 return AVERROR_INVALIDDATA;
462 ctx->subversion = AV_RL16(avctx->extradata);
463 for (i = 0; i < 256; i++)
464 ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4);
470 static av_cold int decode_end(AVCodecContext *avctx)
472 SANMVideoContext *ctx = avctx->priv_data;
474 destroy_buffers(ctx);
479 static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size)
481 int opcode, color, run_len, left = out_size;
484 opcode = bytestream2_get_byte(&ctx->gb);
485 run_len = (opcode >> 1) + 1;
486 if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0)
487 return AVERROR_INVALIDDATA;
490 color = bytestream2_get_byte(&ctx->gb);
491 memset(dst, color, run_len);
493 if (bytestream2_get_bytes_left(&ctx->gb) < run_len)
494 return AVERROR_INVALIDDATA;
495 bytestream2_get_bufferu(&ctx->gb, dst, run_len);
505 static int old_codec1(SANMVideoContext *ctx, int top,
506 int left, int width, int height)
508 uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch;
509 int i, j, len, flag, code, val, pos, end;
511 for (i = 0; i < height; i++) {
514 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
515 return AVERROR_INVALIDDATA;
517 len = bytestream2_get_le16u(&ctx->gb);
518 end = bytestream2_tell(&ctx->gb) + len;
520 while (bytestream2_tell(&ctx->gb) < end) {
521 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
522 return AVERROR_INVALIDDATA;
524 code = bytestream2_get_byteu(&ctx->gb);
526 code = (code >> 1) + 1;
527 if (pos + code > width)
528 return AVERROR_INVALIDDATA;
530 val = bytestream2_get_byteu(&ctx->gb);
532 memset(dst + pos, val, code);
535 if (bytestream2_get_bytes_left(&ctx->gb) < code)
536 return AVERROR_INVALIDDATA;
537 for (j = 0; j < code; j++) {
538 val = bytestream2_get_byteu(&ctx->gb);
547 ctx->rotate_code = 0;
552 static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
553 int height, int stride, int x, int y)
557 pos = x + y * stride;
558 for (j = 0; j < 4; j++) {
559 for (i = 0; i < 4; i++) {
560 if ((pos + i) < 0 || (pos + i) >= height * stride)
571 static int old_codec37(SANMVideoContext *ctx, int top,
572 int left, int width, int height)
574 int stride = ctx->pitch;
578 int compr = bytestream2_get_byte(&ctx->gb);
579 int mvoff = bytestream2_get_byte(&ctx->gb);
580 int seq = bytestream2_get_le16(&ctx->gb);
581 uint32_t decoded_size = bytestream2_get_le32(&ctx->gb);
584 bytestream2_skip(&ctx->gb, 4);
585 flags = bytestream2_get_byte(&ctx->gb);
586 bytestream2_skip(&ctx->gb, 3);
588 if (decoded_size > ctx->height * stride - left - top * stride) {
589 decoded_size = ctx->height * stride - left - top * stride;
590 av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
593 ctx->rotate_code = 0;
595 if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))
598 dst = ((uint8_t*)ctx->frm0) + left + top * stride;
599 prev = ((uint8_t*)ctx->frm2) + left + top * stride;
602 av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff);
603 return AVERROR_INVALIDDATA;
608 for (i = 0; i < height; i++) {
609 bytestream2_get_buffer(&ctx->gb, dst, width);
612 memset(ctx->frm1, 0, ctx->height * stride);
613 memset(ctx->frm2, 0, ctx->height * stride);
616 if (rle_decode(ctx, dst, decoded_size))
617 return AVERROR_INVALIDDATA;
618 memset(ctx->frm1, 0, ctx->frm1_size);
619 memset(ctx->frm2, 0, ctx->frm2_size);
624 for (j = 0; j < height; j += 4) {
625 for (i = 0; i < width; i += 4) {
629 copy_block4(dst + i, prev + i, stride, stride, 4);
632 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
633 return AVERROR_INVALIDDATA;
634 code = bytestream2_get_byteu(&ctx->gb);
637 if (bytestream2_get_bytes_left(&ctx->gb) < 16)
638 return AVERROR_INVALIDDATA;
639 for (k = 0; k < 4; k++)
640 bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
643 if (bytestream2_get_bytes_left(&ctx->gb) < 4)
644 return AVERROR_INVALIDDATA;
645 for (k = 0; k < 4; k++)
646 memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4);
649 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
650 return AVERROR_INVALIDDATA;
651 t = bytestream2_get_byteu(&ctx->gb);
652 for (k = 0; k < 4; k++)
653 memset(dst + i + k * stride, t, 4);
656 if (compr == 4 && !code) {
657 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
658 return AVERROR_INVALIDDATA;
659 skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
664 mx = c37_mv[(mvoff * 255 + code) * 2];
665 my = c37_mv[(mvoff * 255 + code) * 2 + 1];
666 codec37_mv(dst + i, prev + i + mx + my * stride,
667 ctx->height, stride, i + mx, j + my);
675 for (j = 0; j < height; j += 4) {
676 for (i = 0; i < width; i += 4) {
680 copy_block4(dst + i, prev + i, stride, stride, 4);
683 code = bytestream2_get_byte(&ctx->gb);
685 if (bytestream2_get_bytes_left(&ctx->gb) < 16)
686 return AVERROR_INVALIDDATA;
687 for (k = 0; k < 4; k++)
688 bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
689 } else if (compr == 4 && !code) {
690 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
691 return AVERROR_INVALIDDATA;
692 skip_run = bytestream2_get_byteu(&ctx->gb) + 1;
697 mx = c37_mv[(mvoff * 255 + code) * 2];
698 my = c37_mv[(mvoff * 255 + code) * 2 + 1];
699 codec37_mv(dst + i, prev + i + mx + my * stride,
700 ctx->height, stride, i + mx, j + my);
709 avpriv_report_missing_feature(ctx->avctx,
710 "Subcodec 37 compression %d", compr);
711 return AVERROR_PATCHWELCOME;
717 static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1,
718 uint8_t *prev2, int stride, int tbl, int size)
724 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
725 return AVERROR_INVALIDDATA;
727 code = bytestream2_get_byteu(&ctx->gb);
732 if (bytestream2_get_bytes_left(&ctx->gb) < 4)
733 return AVERROR_INVALIDDATA;
734 dst[0] = bytestream2_get_byteu(&ctx->gb);
735 dst[1] = bytestream2_get_byteu(&ctx->gb);
736 dst[0 + stride] = bytestream2_get_byteu(&ctx->gb);
737 dst[1 + stride] = bytestream2_get_byteu(&ctx->gb);
740 if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
741 return AVERROR_INVALIDDATA;
742 if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
744 return AVERROR_INVALIDDATA;
745 dst += size * stride;
746 prev1 += size * stride;
747 prev2 += size * stride;
748 if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
749 return AVERROR_INVALIDDATA;
750 if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
752 return AVERROR_INVALIDDATA;
756 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
757 return AVERROR_INVALIDDATA;
759 t = bytestream2_get_byteu(&ctx->gb);
760 for (k = 0; k < size; k++)
761 memset(dst + k * stride, t, size);
764 if (bytestream2_get_bytes_left(&ctx->gb) < 3)
765 return AVERROR_INVALIDDATA;
767 code = bytestream2_get_byteu(&ctx->gb);
768 pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code];
769 bytestream2_get_bufferu(&ctx->gb, colors, 2);
771 for (k = 0; k < size; k++)
772 for (t = 0; t < size; t++)
773 dst[t + k * stride] = colors[!*pglyph++];
776 for (k = 0; k < size; k++)
777 memcpy(dst + k * stride, prev1 + k * stride, size);
780 k = bytestream2_tell(&ctx->gb);
781 bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET);
782 t = bytestream2_get_byte(&ctx->gb);
783 bytestream2_seek(&ctx->gb, k, SEEK_SET);
784 for (k = 0; k < size; k++)
785 memset(dst + k * stride, t, size);
788 int mx = motion_vectors[code][0];
789 int my = motion_vectors[code][1];
790 int index = prev2 - (const uint8_t *)ctx->frm2;
792 av_assert2(index >= 0 && index < (ctx->buf_size >> 1));
794 if (index < -mx - my * stride ||
795 (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) {
796 av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n");
797 return AVERROR_INVALIDDATA;
800 for (k = 0; k < size; k++)
801 memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size);
807 static int old_codec47(SANMVideoContext *ctx, int top,
808 int left, int width, int height)
810 uint32_t decoded_size;
812 int stride = ctx->pitch;
813 uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride;
814 uint8_t *prev1 = (uint8_t *)ctx->frm1;
815 uint8_t *prev2 = (uint8_t *)ctx->frm2;
816 int tbl_pos = bytestream2_tell(&ctx->gb);
817 int seq = bytestream2_get_le16(&ctx->gb);
818 int compr = bytestream2_get_byte(&ctx->gb);
819 int new_rot = bytestream2_get_byte(&ctx->gb);
820 int skip = bytestream2_get_byte(&ctx->gb);
822 bytestream2_skip(&ctx->gb, 9);
823 decoded_size = bytestream2_get_le32(&ctx->gb);
824 bytestream2_skip(&ctx->gb, 8);
826 if (decoded_size > ctx->height * stride - left - top * stride) {
827 decoded_size = ctx->height * stride - left - top * stride;
828 av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
832 bytestream2_skip(&ctx->gb, 0x8080);
835 memset(prev1, 0, ctx->height * stride);
836 memset(prev2, 0, ctx->height * stride);
841 if (bytestream2_get_bytes_left(&ctx->gb) < width * height)
842 return AVERROR_INVALIDDATA;
843 for (j = 0; j < height; j++) {
844 bytestream2_get_bufferu(&ctx->gb, dst, width);
849 if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1))
850 return AVERROR_INVALIDDATA;
851 for (j = 0; j < height; j += 2) {
852 for (i = 0; i < width; i += 2) {
856 dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb);
862 if (seq == ctx->prev_seq + 1) {
863 for (j = 0; j < height; j += 8) {
864 for (i = 0; i < width; i += 8)
865 if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride,
867 return AVERROR_INVALIDDATA;
875 memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height);
878 memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height);
881 if (rle_decode(ctx, dst, decoded_size))
882 return AVERROR_INVALIDDATA;
885 avpriv_report_missing_feature(ctx->avctx,
886 "Subcodec 47 compression %d", compr);
887 return AVERROR_PATCHWELCOME;
889 if (seq == ctx->prev_seq + 1)
890 ctx->rotate_code = new_rot;
892 ctx->rotate_code = 0;
898 static int process_frame_obj(SANMVideoContext *ctx)
900 uint16_t codec = bytestream2_get_le16u(&ctx->gb);
901 uint16_t left = bytestream2_get_le16u(&ctx->gb);
902 uint16_t top = bytestream2_get_le16u(&ctx->gb);
903 uint16_t w = bytestream2_get_le16u(&ctx->gb);
904 uint16_t h = bytestream2_get_le16u(&ctx->gb);
907 av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n");
908 return AVERROR_INVALIDDATA;
911 if (ctx->width < left + w || ctx->height < top + h) {
912 int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width),
913 FFMAX(top + h, ctx->height));
916 init_sizes(ctx, FFMAX(left + w, ctx->width),
917 FFMAX(top + h, ctx->height));
918 if (init_buffers(ctx)) {
919 av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n");
920 return AVERROR(ENOMEM);
923 bytestream2_skip(&ctx->gb, 4);
928 return old_codec1(ctx, top, left, w, h);
931 return old_codec37(ctx, top, left, w, h);
934 return old_codec47(ctx, top, left, w, h);
937 avpriv_request_sample(ctx->avctx, "Subcodec %d", codec);
938 return AVERROR_PATCHWELCOME;
942 static int decode_0(SANMVideoContext *ctx)
944 uint16_t *frm = ctx->frm0;
947 if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) {
948 av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n");
949 return AVERROR_INVALIDDATA;
951 for (y = 0; y < ctx->height; y++) {
952 for (x = 0; x < ctx->width; x++)
953 frm[x] = bytestream2_get_le16u(&ctx->gb);
959 static int decode_nop(SANMVideoContext *ctx)
961 avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type");
962 return AVERROR_PATCHWELCOME;
965 static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, int pitch)
967 uint8_t *dst = (uint8_t *)pdest;
968 uint8_t *src = (uint8_t *)psrc;
969 int stride = pitch * 2;
971 switch (block_size) {
973 copy_block4(dst, src, stride, stride, 2);
976 copy_block8(dst, src, stride, stride, 4);
979 copy_block16(dst, src, stride, stride, 8);
984 static void fill_block(uint16_t *pdest, uint16_t color, int block_size, int pitch)
989 for (y = 0; y < block_size; y++, pdest += pitch)
990 for (x = 0; x < block_size; x++)
994 static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index,
995 uint16_t fg_color, uint16_t bg_color, int block_size,
999 uint16_t colors[2] = { fg_color, bg_color };
1002 if (index >= NGLYPHS) {
1003 av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index);
1004 return AVERROR_INVALIDDATA;
1007 pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index];
1008 pitch -= block_size;
1010 for (y = 0; y < block_size; y++, dst += pitch)
1011 for (x = 0; x < block_size; x++)
1012 *dst++ = colors[*pglyph++];
1016 static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1018 uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1020 if (block_size == 2) {
1023 if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1024 return AVERROR_INVALIDDATA;
1026 indices = bytestream2_get_le32u(&ctx->gb);
1027 dst[0] = ctx->codebook[indices & 0xFF];
1029 dst[1] = ctx->codebook[indices & 0xFF];
1031 dst[pitch] = ctx->codebook[indices & 0xFF];
1033 dst[pitch + 1] = ctx->codebook[indices & 0xFF];
1035 uint16_t fgcolor, bgcolor;
1038 if (bytestream2_get_bytes_left(&ctx->gb) < 3)
1039 return AVERROR_INVALIDDATA;
1041 glyph = bytestream2_get_byteu(&ctx->gb);
1042 bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1043 fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1045 draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1050 static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, int pitch)
1052 uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1054 if (block_size == 2) {
1055 if (bytestream2_get_bytes_left(&ctx->gb) < 8)
1056 return AVERROR_INVALIDDATA;
1058 dst[0] = bytestream2_get_le16u(&ctx->gb);
1059 dst[1] = bytestream2_get_le16u(&ctx->gb);
1060 dst[pitch] = bytestream2_get_le16u(&ctx->gb);
1061 dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb);
1063 uint16_t fgcolor, bgcolor;
1066 if (bytestream2_get_bytes_left(&ctx->gb) < 5)
1067 return AVERROR_INVALIDDATA;
1069 glyph = bytestream2_get_byteu(&ctx->gb);
1070 bgcolor = bytestream2_get_le16u(&ctx->gb);
1071 fgcolor = bytestream2_get_le16u(&ctx->gb);
1073 draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1078 static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my,
1081 int start_pos = cx + mx + (cy + my) * ctx->pitch;
1082 int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1);
1084 int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1);
1087 av_log(ctx->avctx, AV_LOG_ERROR,
1088 "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n",
1089 cx + mx, cy + my, cx, cy, block_size);
1094 static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
1096 int16_t mx, my, index;
1099 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1100 return AVERROR_INVALIDDATA;
1102 opcode = bytestream2_get_byteu(&ctx->gb);
1106 mx = motion_vectors[opcode][0];
1107 my = motion_vectors[opcode][1];
1109 if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
1110 copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1111 ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
1112 blk_size, ctx->pitch);
1116 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1117 return AVERROR_INVALIDDATA;
1118 index = bytestream2_get_le16u(&ctx->gb);
1120 mx = index % ctx->width;
1121 my = index / ctx->width;
1123 if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
1124 copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1125 ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
1126 blk_size, ctx->pitch);
1130 copy_block(ctx->frm0 + cx + ctx->pitch * cy,
1131 ctx->frm1 + cx + ctx->pitch * cy,
1132 blk_size, ctx->pitch);
1135 opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch);
1139 opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
1145 fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1146 ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch);
1149 if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1150 return AVERROR_INVALIDDATA;
1151 fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1152 ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch);
1155 if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1156 return AVERROR_INVALIDDATA;
1157 fill_block(ctx->frm0 + cx + cy * ctx->pitch,
1158 bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch);
1161 if (blk_size == 2) {
1162 opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
1165 if (codec2subblock(ctx, cx, cy, blk_size))
1166 return AVERROR_INVALIDDATA;
1167 if (codec2subblock(ctx, cx + blk_size, cy, blk_size))
1168 return AVERROR_INVALIDDATA;
1169 if (codec2subblock(ctx, cx, cy + blk_size, blk_size))
1170 return AVERROR_INVALIDDATA;
1171 if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size))
1172 return AVERROR_INVALIDDATA;
1179 static int decode_2(SANMVideoContext *ctx)
1183 for (cy = 0; cy < ctx->aligned_height; cy += 8)
1184 for (cx = 0; cx < ctx->aligned_width; cx += 8)
1185 if (ret = codec2subblock(ctx, cx, cy, 8))
1191 static int decode_3(SANMVideoContext *ctx)
1193 memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
1197 static int decode_4(SANMVideoContext *ctx)
1199 memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
1203 static int decode_5(SANMVideoContext *ctx)
1209 uint8_t *dst = (uint8_t*)ctx->frm0;
1211 if (rle_decode(ctx, dst, ctx->buf_size))
1212 return AVERROR_INVALIDDATA;
1215 npixels = ctx->npixels;
1218 *frm = av_bswap16(*frm);
1226 static int decode_6(SANMVideoContext *ctx)
1228 int npixels = ctx->npixels;
1229 uint16_t *frm = ctx->frm0;
1231 if (bytestream2_get_bytes_left(&ctx->gb) < npixels) {
1232 av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n");
1233 return AVERROR_INVALIDDATA;
1236 *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1241 static int decode_8(SANMVideoContext *ctx)
1243 uint16_t *pdest = ctx->frm0;
1245 long npixels = ctx->npixels;
1247 av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels);
1248 if (!ctx->rle_buf) {
1249 av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n");
1250 return AVERROR(ENOMEM);
1252 rsrc = ctx->rle_buf;
1254 if (rle_decode(ctx, rsrc, npixels))
1255 return AVERROR_INVALIDDATA;
1258 *pdest++ = ctx->codebook[*rsrc++];
1263 typedef int (*frm_decoder)(SANMVideoContext *ctx);
1265 static const frm_decoder v1_decoders[] = {
1266 decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
1267 decode_6, decode_nop, decode_8
1270 static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
1274 if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) {
1275 av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n",
1277 return AVERROR_INVALIDDATA;
1279 bytestream2_skip(&ctx->gb, 8); // skip pad
1281 hdr->width = bytestream2_get_le32u(&ctx->gb);
1282 hdr->height = bytestream2_get_le32u(&ctx->gb);
1284 if (hdr->width != ctx->width || hdr->height != ctx->height) {
1285 avpriv_report_missing_feature(ctx->avctx, "Variable size frames");
1286 return AVERROR_PATCHWELCOME;
1289 hdr->seq_num = bytestream2_get_le16u(&ctx->gb);
1290 hdr->codec = bytestream2_get_byteu(&ctx->gb);
1291 hdr->rotate_code = bytestream2_get_byteu(&ctx->gb);
1293 bytestream2_skip(&ctx->gb, 4); // skip pad
1295 for (i = 0; i < 4; i++)
1296 ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb);
1297 hdr->bg_color = bytestream2_get_le16u(&ctx->gb);
1299 bytestream2_skip(&ctx->gb, 2); // skip pad
1301 hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb);
1302 for (i = 0; i < 256; i++)
1303 ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb);
1305 bytestream2_skip(&ctx->gb, 8); // skip pad
1310 static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
1316 static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
1319 const uint8_t *src = (uint8_t*) ctx->frm0;
1320 int ret, dstpitch, height = ctx->height;
1321 int srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1);
1323 if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0)
1326 dst = ctx->frame->data[0];
1327 dstpitch = ctx->frame->linesize[0];
1330 memcpy(dst, src, srcpitch);
1338 static int decode_frame(AVCodecContext *avctx, void *data,
1339 int *got_frame_ptr, AVPacket *pkt)
1341 SANMVideoContext *ctx = avctx->priv_data;
1345 bytestream2_init(&ctx->gb, pkt->data, pkt->size);
1347 if (!ctx->version) {
1350 while (bytestream2_get_bytes_left(&ctx->gb) >= 8) {
1354 sig = bytestream2_get_be32u(&ctx->gb);
1355 size = bytestream2_get_be32u(&ctx->gb);
1356 pos = bytestream2_tell(&ctx->gb);
1358 if (bytestream2_get_bytes_left(&ctx->gb) < size) {
1359 av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %d.\n", size);
1363 case MKBETAG('N', 'P', 'A', 'L'):
1364 if (size != PALETTE_SIZE * 3) {
1365 av_log(avctx, AV_LOG_ERROR,
1366 "Incorrect palette block size %d.\n", size);
1367 return AVERROR_INVALIDDATA;
1369 for (i = 0; i < PALETTE_SIZE; i++)
1370 ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1372 case MKBETAG('F', 'O', 'B', 'J'):
1374 return AVERROR_INVALIDDATA;
1375 if (ret = process_frame_obj(ctx))
1378 case MKBETAG('X', 'P', 'A', 'L'):
1379 if (size == 6 || size == 4) {
1383 for (i = 0; i < PALETTE_SIZE; i++) {
1384 for (j = 0; j < 3; j++) {
1385 int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF;
1386 tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7);
1388 ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp);
1391 if (size < PALETTE_DELTA * 2 + 4) {
1392 av_log(avctx, AV_LOG_ERROR, "Incorrect palette change block size %d.\n",
1394 return AVERROR_INVALIDDATA;
1396 bytestream2_skipu(&ctx->gb, 4);
1397 for (i = 0; i < PALETTE_DELTA; i++)
1398 ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb);
1399 if (size >= PALETTE_DELTA * 5 + 4) {
1400 for (i = 0; i < PALETTE_SIZE; i++)
1401 ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1403 memset(ctx->pal, 0, sizeof(ctx->pal));
1407 case MKBETAG('S', 'T', 'O', 'R'):
1410 case MKBETAG('F', 'T', 'C', 'H'):
1411 memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size);
1414 bytestream2_skip(&ctx->gb, size);
1415 av_log(avctx, AV_LOG_DEBUG, "Unknown/unsupported chunk %x.\n", sig);
1419 bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
1421 bytestream2_skip(&ctx->gb, 1);
1424 memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size);
1425 if ((ret = copy_output(ctx, NULL)))
1427 memcpy(ctx->frame->data[1], ctx->pal, 1024);
1429 SANMFrameHeader header;
1431 if ((ret = read_frame_header(ctx, &header)))
1434 ctx->rotate_code = header.rotate_code;
1435 if ((ctx->frame->key_frame = !header.seq_num)) {
1436 ctx->frame->pict_type = AV_PICTURE_TYPE_I;
1437 fill_frame(ctx->frm1, ctx->npixels, header.bg_color);
1438 fill_frame(ctx->frm2, ctx->npixels, header.bg_color);
1440 ctx->frame->pict_type = AV_PICTURE_TYPE_P;
1443 if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) {
1444 if ((ret = v1_decoders[header.codec](ctx))) {
1445 av_log(avctx, AV_LOG_ERROR,
1446 "Subcodec %d: error decoding frame.\n", header.codec);
1450 avpriv_request_sample(avctx, "Subcodec %d", header.codec);
1451 return AVERROR_PATCHWELCOME;
1454 if ((ret = copy_output(ctx, &header)))
1457 if (ctx->rotate_code)
1458 rotate_bufs(ctx, ctx->rotate_code);
1465 AVCodec ff_sanm_decoder = {
1467 .long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM video"),
1468 .type = AVMEDIA_TYPE_VIDEO,
1469 .id = AV_CODEC_ID_SANM,
1470 .priv_data_size = sizeof(SANMVideoContext),
1471 .init = decode_init,
1472 .close = decode_end,
1473 .decode = decode_frame,
1474 .capabilities = CODEC_CAP_DR1,