FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* LucasArts Smush video decoder
3			* Copyright (c) 2006 Cyril Zorin
4			* Copyright (c) 2011 Konstantin Shishkov
5			*
6			* This file is part of FFmpeg.
7			*
8			* FFmpeg 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.
12			*
13			* FFmpeg 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.
17			*
18			* You should have received a copy of the GNU Lesser General Public
19			* License along with FFmpeg; if not, write to the Free Software
20			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*/
22
23			#include "libavutil/avassert.h"
24			#include "libavutil/mem.h"
25
26			#include "avcodec.h"
27			#include "bytestream.h"
28			#include "copy_block.h"
29			#include "codec_internal.h"
30			#include "decode.h"
31
32			#define NGLYPHS 256
33			#define GLYPH_COORD_VECT_SIZE 16
34			#define PALETTE_SIZE 256
35			#define PALETTE_DELTA 768
36
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
39			};
40
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
43			};
44
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
47			};
48
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
51			};
52
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 },
105			};
106
107			static const int8_t c37_mv[] = {
108			0, 0, 1, 0, 2, 0, 3, 0, 5, 0,
109			8, 0, 13, 0, 21, 0, -1, 0, -2, 0,
110			-3, 0, -5, 0, -8, 0, -13, 0, -17, 0,
111			-21, 0, 0, 1, 1, 1, 2, 1, 3, 1,
112			5, 1, 8, 1, 13, 1, 21, 1, -1, 1,
113			-2, 1, -3, 1, -5, 1, -8, 1, -13, 1,
114			-17, 1, -21, 1, 0, 2, 1, 2, 2, 2,
115			3, 2, 5, 2, 8, 2, 13, 2, 21, 2,
116			-1, 2, -2, 2, -3, 2, -5, 2, -8, 2,
117			-13, 2, -17, 2, -21, 2, 0, 3, 1, 3,
118			2, 3, 3, 3, 5, 3, 8, 3, 13, 3,
119			21, 3, -1, 3, -2, 3, -3, 3, -5, 3,
120			-8, 3, -13, 3, -17, 3, -21, 3, 0, 5,
121			1, 5, 2, 5, 3, 5, 5, 5, 8, 5,
122			13, 5, 21, 5, -1, 5, -2, 5, -3, 5,
123			-5, 5, -8, 5, -13, 5, -17, 5, -21, 5,
124			0, 8, 1, 8, 2, 8, 3, 8, 5, 8,
125			8, 8, 13, 8, 21, 8, -1, 8, -2, 8,
126			-3, 8, -5, 8, -8, 8, -13, 8, -17, 8,
127			-21, 8, 0, 13, 1, 13, 2, 13, 3, 13,
128			5, 13, 8, 13, 13, 13, 21, 13, -1, 13,
129			-2, 13, -3, 13, -5, 13, -8, 13, -13, 13,
130			-17, 13, -21, 13, 0, 21, 1, 21, 2, 21,
131			3, 21, 5, 21, 8, 21, 13, 21, 21, 21,
132			-1, 21, -2, 21, -3, 21, -5, 21, -8, 21,
133			-13, 21, -17, 21, -21, 21, 0, -1, 1, -1,
134			2, -1, 3, -1, 5, -1, 8, -1, 13, -1,
135			21, -1, -1, -1, -2, -1, -3, -1, -5, -1,
136			-8, -1, -13, -1, -17, -1, -21, -1, 0, -2,
137			1, -2, 2, -2, 3, -2, 5, -2, 8, -2,
138			13, -2, 21, -2, -1, -2, -2, -2, -3, -2,
139			-5, -2, -8, -2, -13, -2, -17, -2, -21, -2,
140			0, -3, 1, -3, 2, -3, 3, -3, 5, -3,
141			8, -3, 13, -3, 21, -3, -1, -3, -2, -3,
142			-3, -3, -5, -3, -8, -3, -13, -3, -17, -3,
143			-21, -3, 0, -5, 1, -5, 2, -5, 3, -5,
144			5, -5, 8, -5, 13, -5, 21, -5, -1, -5,
145			-2, -5, -3, -5, -5, -5, -8, -5, -13, -5,
146			-17, -5, -21, -5, 0, -8, 1, -8, 2, -8,
147			3, -8, 5, -8, 8, -8, 13, -8, 21, -8,
148			-1, -8, -2, -8, -3, -8, -5, -8, -8, -8,
149			-13, -8, -17, -8, -21, -8, 0, -13, 1, -13,
150			2, -13, 3, -13, 5, -13, 8, -13, 13, -13,
151			21, -13, -1, -13, -2, -13, -3, -13, -5, -13,
152			-8, -13, -13, -13, -17, -13, -21, -13, 0, -17,
153			1, -17, 2, -17, 3, -17, 5, -17, 8, -17,
154			13, -17, 21, -17, -1, -17, -2, -17, -3, -17,
155			-5, -17, -8, -17, -13, -17, -17, -17, -21, -17,
156			0, -21, 1, -21, 2, -21, 3, -21, 5, -21,
157			8, -21, 13, -21, 21, -21, -1, -21, -2, -21,
158			-3, -21, -5, -21, -8, -21, -13, -21, -17, -21,
159			0, 0, -8, -29, 8, -29, -18, -25, 17, -25,
160			0, -23, -6, -22, 6, -22, -13, -19, 12, -19,
161			0, -18, 25, -18, -25, -17, -5, -17, 5, -17,
162			-10, -15, 10, -15, 0, -14, -4, -13, 4, -13,
163			19, -13, -19, -12, -8, -11, -2, -11, 0, -11,
164			2, -11, 8, -11, -15, -10, -4, -10, 4, -10,
165			15, -10, -6, -9, -1, -9, 1, -9, 6, -9,
166			-29, -8, -11, -8, -8, -8, -3, -8, 3, -8,
167			8, -8, 11, -8, 29, -8, -5, -7, -2, -7,
168			0, -7, 2, -7, 5, -7, -22, -6, -9, -6,
169			-6, -6, -3, -6, -1, -6, 1, -6, 3, -6,
170			6, -6, 9, -6, 22, -6, -17, -5, -7, -5,
171			-4, -5, -2, -5, 0, -5, 2, -5, 4, -5,
172			7, -5, 17, -5, -13, -4, -10, -4, -5, -4,
173			-3, -4, -1, -4, 0, -4, 1, -4, 3, -4,
174			5, -4, 10, -4, 13, -4, -8, -3, -6, -3,
175			-4, -3, -3, -3, -2, -3, -1, -3, 0, -3,
176			1, -3, 2, -3, 4, -3, 6, -3, 8, -3,
177			-11, -2, -7, -2, -5, -2, -3, -2, -2, -2,
178			-1, -2, 0, -2, 1, -2, 2, -2, 3, -2,
179			5, -2, 7, -2, 11, -2, -9, -1, -6, -1,
180			-4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
181			1, -1, 2, -1, 3, -1, 4, -1, 6, -1,
182			9, -1, -31, 0, -23, 0, -18, 0, -14, 0,
183			-11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
184			-2, 0, -1, 0, 0, -31, 1, 0, 2, 0,
185			3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
186			14, 0, 18, 0, 23, 0, 31, 0, -9, 1,
187			-6, 1, -4, 1, -3, 1, -2, 1, -1, 1,
188			0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
189			6, 1, 9, 1, -11, 2, -7, 2, -5, 2,
190			-3, 2, -2, 2, -1, 2, 0, 2, 1, 2,
191			2, 2, 3, 2, 5, 2, 7, 2, 11, 2,
192			-8, 3, -6, 3, -4, 3, -2, 3, -1, 3,
193			0, 3, 1, 3, 2, 3, 3, 3, 4, 3,
194			6, 3, 8, 3, -13, 4, -10, 4, -5, 4,
195			-3, 4, -1, 4, 0, 4, 1, 4, 3, 4,
196			5, 4, 10, 4, 13, 4, -17, 5, -7, 5,
197			-4, 5, -2, 5, 0, 5, 2, 5, 4, 5,
198			7, 5, 17, 5, -22, 6, -9, 6, -6, 6,
199			-3, 6, -1, 6, 1, 6, 3, 6, 6, 6,
200			9, 6, 22, 6, -5, 7, -2, 7, 0, 7,
201			2, 7, 5, 7, -29, 8, -11, 8, -8, 8,
202			-3, 8, 3, 8, 8, 8, 11, 8, 29, 8,
203			-6, 9, -1, 9, 1, 9, 6, 9, -15, 10,
204			-4, 10, 4, 10, 15, 10, -8, 11, -2, 11,
205			0, 11, 2, 11, 8, 11, 19, 12, -19, 13,
206			-4, 13, 4, 13, 0, 14, -10, 15, 10, 15,
207			-5, 17, 5, 17, 25, 17, -25, 18, 0, 18,
208			-12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
209			-17, 25, 18, 25, -8, 29, 8, 29, 0, 31,
210			0, 0, -6, -22, 6, -22, -13, -19, 12, -19,
211			0, -18, -5, -17, 5, -17, -10, -15, 10, -15,
212			0, -14, -4, -13, 4, -13, 19, -13, -19, -12,
213			-8, -11, -2, -11, 0, -11, 2, -11, 8, -11,
214			-15, -10, -4, -10, 4, -10, 15, -10, -6, -9,
215			-1, -9, 1, -9, 6, -9, -11, -8, -8, -8,
216			-3, -8, 0, -8, 3, -8, 8, -8, 11, -8,
217			-5, -7, -2, -7, 0, -7, 2, -7, 5, -7,
218			-22, -6, -9, -6, -6, -6, -3, -6, -1, -6,
219			1, -6, 3, -6, 6, -6, 9, -6, 22, -6,
220			-17, -5, -7, -5, -4, -5, -2, -5, -1, -5,
221			0, -5, 1, -5, 2, -5, 4, -5, 7, -5,
222			17, -5, -13, -4, -10, -4, -5, -4, -3, -4,
223			-2, -4, -1, -4, 0, -4, 1, -4, 2, -4,
224			3, -4, 5, -4, 10, -4, 13, -4, -8, -3,
225			-6, -3, -4, -3, -3, -3, -2, -3, -1, -3,
226			0, -3, 1, -3, 2, -3, 3, -3, 4, -3,
227			6, -3, 8, -3, -11, -2, -7, -2, -5, -2,
228			-4, -2, -3, -2, -2, -2, -1, -2, 0, -2,
229			1, -2, 2, -2, 3, -2, 4, -2, 5, -2,
230			7, -2, 11, -2, -9, -1, -6, -1, -5, -1,
231			-4, -1, -3, -1, -2, -1, -1, -1, 0, -1,
232			1, -1, 2, -1, 3, -1, 4, -1, 5, -1,
233			6, -1, 9, -1, -23, 0, -18, 0, -14, 0,
234			-11, 0, -7, 0, -5, 0, -4, 0, -3, 0,
235			-2, 0, -1, 0, 0, -23, 1, 0, 2, 0,
236			3, 0, 4, 0, 5, 0, 7, 0, 11, 0,
237			14, 0, 18, 0, 23, 0, -9, 1, -6, 1,
238			-5, 1, -4, 1, -3, 1, -2, 1, -1, 1,
239			0, 1, 1, 1, 2, 1, 3, 1, 4, 1,
240			5, 1, 6, 1, 9, 1, -11, 2, -7, 2,
241			-5, 2, -4, 2, -3, 2, -2, 2, -1, 2,
242			0, 2, 1, 2, 2, 2, 3, 2, 4, 2,
243			5, 2, 7, 2, 11, 2, -8, 3, -6, 3,
244			-4, 3, -3, 3, -2, 3, -1, 3, 0, 3,
245			1, 3, 2, 3, 3, 3, 4, 3, 6, 3,
246			8, 3, -13, 4, -10, 4, -5, 4, -3, 4,
247			-2, 4, -1, 4, 0, 4, 1, 4, 2, 4,
248			3, 4, 5, 4, 10, 4, 13, 4, -17, 5,
249			-7, 5, -4, 5, -2, 5, -1, 5, 0, 5,
250			1, 5, 2, 5, 4, 5, 7, 5, 17, 5,
251			-22, 6, -9, 6, -6, 6, -3, 6, -1, 6,
252			1, 6, 3, 6, 6, 6, 9, 6, 22, 6,
253			-5, 7, -2, 7, 0, 7, 2, 7, 5, 7,
254			-11, 8, -8, 8, -3, 8, 0, 8, 3, 8,
255			8, 8, 11, 8, -6, 9, -1, 9, 1, 9,
256			6, 9, -15, 10, -4, 10, 4, 10, 15, 10,
257			-8, 11, -2, 11, 0, 11, 2, 11, 8, 11,
258			19, 12, -19, 13, -4, 13, 4, 13, 0, 14,
259			-10, 15, 10, 15, -5, 17, 5, 17, 0, 18,
260			-12, 19, 13, 19, -6, 22, 6, 22, 0, 23,
261			};
262
263			typedef struct SANMVideoContext {
264			AVCodecContext *avctx;
265			GetByteContext gb;
266
267			int version, subversion, have_dimensions, first_fob;
268			uint32_t pal[PALETTE_SIZE];
269			int16_t delta_pal[PALETTE_DELTA];
270
271			ptrdiff_t pitch;
272			int width, height;
273			int aligned_width, aligned_height;
274			int prev_seq;
275
276			AVFrame *frame;
277			uint16_t *fbuf, *frm0, *frm1, *frm2;
278			uint8_t *stored_frame;
279			uint32_t fbuf_size, frm0_size, frm1_size, frm2_size;
280			uint32_t stored_frame_size;
281
282			uint8_t *rle_buf;
283			unsigned int rle_buf_size;
284
285			int rotate_code;
286
287			long npixels, buf_size;
288
289			uint16_t codebook[256];
290			uint16_t small_codebook[4];
291
292			int8_t p4x4glyphs[NGLYPHS][16];
293			int8_t p8x8glyphs[NGLYPHS][64];
294			uint8_t c47itbl[0x10000];
295			uint8_t c23lut[256];
296			uint8_t c4tbl[2][256][16];
297			uint16_t c4param;
298			} SANMVideoContext;
299
300			typedef struct SANMFrameHeader {
301			int seq_num, codec, rotate_code, rle_output_size;
302
303			uint16_t bg_color;
304			uint32_t width, height;
305			} SANMFrameHeader;
306
307			enum GlyphEdge {
308			LEFT_EDGE,
309			TOP_EDGE,
310			RIGHT_EDGE,
311			BOTTOM_EDGE,
312			NO_EDGE
313			};
314
315			enum GlyphDir {
316			DIR_LEFT,
317			DIR_UP,
318			DIR_RIGHT,
319			DIR_DOWN,
320			NO_DIR
321			};
322
323			/**
324			* Return enum GlyphEdge of box where point (x, y) lies.
325			*
326			* @param x x point coordinate
327			* @param y y point coordinate
328			* @param edge_size box width/height.
329			*/
330		1632	static enum GlyphEdge which_edge(int x, int y, int edge_size)
331			{
332		1632	const int edge_max = edge_size - 1;
333
334	2/2 ✓ Branch 0 taken 408 times. ✓ Branch 1 taken 1224 times.	1632	if (!y)
335		408	return BOTTOM_EDGE;
336	2/2 ✓ Branch 0 taken 408 times. ✓ Branch 1 taken 816 times.	1224	else if (y == edge_max)
337		408	return TOP_EDGE;
338	2/2 ✓ Branch 0 taken 306 times. ✓ Branch 1 taken 510 times.	816	else if (!x)
339		306	return LEFT_EDGE;
340	2/2 ✓ Branch 0 taken 306 times. ✓ Branch 1 taken 204 times.	510	else if (x == edge_max)
341		306	return RIGHT_EDGE;
342			else
343		204	return NO_EDGE;
344			}
345
346		1536	static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1)
347			{
348	6/6 ✓ Branch 0 taken 288 times. ✓ Branch 1 taken 1248 times. ✓ Branch 2 taken 228 times. ✓ Branch 3 taken 60 times. ✓ Branch 4 taken 288 times. ✓ Branch 5 taken 1188 times.	1536	if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) ||
349	4/4 ✓ Branch 0 taken 228 times. ✓ Branch 1 taken 60 times. ✓ Branch 2 taken 384 times. ✓ Branch 3 taken 1032 times.	1476	(edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) ||
350	4/4 ✓ Branch 0 taken 96 times. ✓ Branch 1 taken 288 times. ✓ Branch 2 taken 288 times. ✓ Branch 3 taken 840 times.	1416	(edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) ||
351	2/2 ✓ Branch 0 taken 192 times. ✓ Branch 1 taken 96 times.	288	(edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE))
352		600	return DIR_UP;
353	6/6 ✓ Branch 0 taken 384 times. ✓ Branch 1 taken 552 times. ✓ Branch 2 taken 96 times. ✓ Branch 3 taken 288 times. ✓ Branch 4 taken 288 times. ✓ Branch 5 taken 360 times.	936	else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) ||
354	2/2 ✓ Branch 0 taken 192 times. ✓ Branch 1 taken 96 times.	288	(edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE))
355		480	return DIR_DOWN;
356	5/6 ✓ Branch 0 taken 84 times. ✓ Branch 1 taken 372 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 84 times. ✓ Branch 4 taken 24 times. ✓ Branch 5 taken 348 times.	456	else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) ||
357	1/2 ✓ Branch 0 taken 24 times. ✗ Branch 1 not taken.	24	(edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE))
358		108	return DIR_LEFT;
359	5/6 ✓ Branch 0 taken 96 times. ✓ Branch 1 taken 252 times. ✗ Branch 2 not taken. ✓ Branch 3 taken 96 times. ✓ Branch 4 taken 96 times. ✓ Branch 5 taken 156 times.	348	else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) ||
360	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 96 times. ✓ Branch 2 taken 84 times. ✓ Branch 3 taken 72 times.	252	(edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) ||
361	3/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 84 times. ✓ Branch 2 taken 24 times. ✓ Branch 3 taken 48 times.	156	(edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) ||
362	1/2 ✓ Branch 0 taken 24 times. ✗ Branch 1 not taken.	24	(edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE))
363		300	return DIR_RIGHT;
364
365		48	return NO_DIR;
366			}
367
368			/* Interpolate two points. */
369		6600	static void interp_point(int8_t *points, int x0, int y0, int x1, int y1,
370			int pos, int npoints)
371			{
372	2/2 ✓ Branch 0 taken 6504 times. ✓ Branch 1 taken 96 times.	6600	if (npoints) {
373		6504	points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints;
374		6504	points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints;
375			} else {
376		96	points[0] = x0;
377		96	points[1] = y0;
378			}
379		6600	}
380
381			/**
382			* Construct glyphs by iterating through vector coordinates.
383			*
384			* @param pglyphs pointer to table where glyphs are stored
385			* @param xvec pointer to x component of vector coordinates
386			* @param yvec pointer to y component of vector coordinates
387			* @param side_length glyph width/height.
388			*/
389		6	static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec,
390			const int side_length)
391			{
392		6	const int glyph_size = side_length * side_length;
393		6	int8_t *pglyph = pglyphs;
394
395			int i, j;
396	2/2 ✓ Branch 0 taken 96 times. ✓ Branch 1 taken 6 times.	102	for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) {
397		96	int x0 = xvec[i];
398		96	int y0 = yvec[i];
399		96	enum GlyphEdge edge0 = which_edge(x0, y0, side_length);
400
401	2/2 ✓ Branch 0 taken 1536 times. ✓ Branch 1 taken 96 times.	1632	for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) {
402		1536	int x1 = xvec[j];
403		1536	int y1 = yvec[j];
404		1536	enum GlyphEdge edge1 = which_edge(x1, y1, side_length);
405		1536	enum GlyphDir dir = which_direction(edge0, edge1);
406		1536	int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0));
407			int ipoint;
408
409	2/2 ✓ Branch 0 taken 6600 times. ✓ Branch 1 taken 1536 times.	8136	for (ipoint = 0; ipoint <= npoints; ipoint++) {
410			int8_t point[2];
411			int irow, icol;
412
413		6600	interp_point(point, x0, y0, x1, y1, ipoint, npoints);
414
415	5/5 ✓ Branch 0 taken 2832 times. ✓ Branch 1 taken 1968 times. ✓ Branch 2 taken 282 times. ✓ Branch 3 taken 1434 times. ✓ Branch 4 taken 84 times.	6600	switch (dir) {
416		2832	case DIR_UP:
417	2/2 ✓ Branch 0 taken 8232 times. ✓ Branch 1 taken 2832 times.	11064	for (irow = point[1]; irow >= 0; irow--)
418		8232	pglyph[point[0] + irow * side_length] = 1;
419		2832	break;
420
421		1968	case DIR_DOWN:
422	2/2 ✓ Branch 0 taken 4500 times. ✓ Branch 1 taken 1968 times.	6468	for (irow = point[1]; irow < side_length; irow++)
423		4500	pglyph[point[0] + irow * side_length] = 1;
424		1968	break;
425
426		282	case DIR_LEFT:
427	2/2 ✓ Branch 0 taken 378 times. ✓ Branch 1 taken 282 times.	660	for (icol = point[0]; icol >= 0; icol--)
428		378	pglyph[icol + point[1] * side_length] = 1;
429		282	break;
430
431		1434	case DIR_RIGHT:
432	2/2 ✓ Branch 0 taken 4794 times. ✓ Branch 1 taken 1434 times.	6228	for (icol = point[0]; icol < side_length; icol++)
433		4794	pglyph[icol + point[1] * side_length] = 1;
434		1434	break;
435			}
436			}
437			}
438			}
439		6	}
440
441		6	static void init_sizes(SANMVideoContext *ctx, int width, int height)
442			{
443		6	ctx->width = width;
444		6	ctx->height = height;
445		6	ctx->npixels = width * height;
446
447		6	ctx->aligned_width = FFALIGN(width, 8);
448		6	ctx->aligned_height = FFALIGN(height, 8);
449
450		6	ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]);
451		6	ctx->pitch = width;
452		6	}
453
454		3	static void destroy_buffers(SANMVideoContext *ctx)
455			{
456		3	av_freep(&ctx->fbuf);
457		3	av_freep(&ctx->frm0);
458		3	av_freep(&ctx->frm1);
459		3	av_freep(&ctx->frm2);
460		3	av_freep(&ctx->stored_frame);
461		3	av_freep(&ctx->rle_buf);
462		3	ctx->frm0_size =
463		3	ctx->frm1_size =
464		3	ctx->frm2_size = 0;
465		3	init_sizes(ctx, 0, 0);
466		3	}
467
468		3	static av_cold int init_buffers(SANMVideoContext *ctx)
469			{
470		3	av_fast_padded_mallocz(&ctx->fbuf, &ctx->fbuf_size, ctx->buf_size);
471		3	av_fast_padded_mallocz(&ctx->frm0, &ctx->frm0_size, ctx->buf_size);
472		3	av_fast_padded_mallocz(&ctx->frm1, &ctx->frm1_size, ctx->buf_size);
473		3	av_fast_padded_mallocz(&ctx->frm2, &ctx->frm2_size, ctx->buf_size);
474	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!ctx->version)
475		✗	av_fast_padded_mallocz(&ctx->stored_frame,
476		✗	&ctx->stored_frame_size, ctx->buf_size);
477
478	3/6 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 3 times. ✗ Branch 3 not taken. ✓ Branch 4 taken 3 times. ✗ Branch 5 not taken.	3	if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 ||
479	2/4 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 3 times.	3	(!ctx->stored_frame && !ctx->version)) {
480		✗	destroy_buffers(ctx);
481		✗	return AVERROR(ENOMEM);
482			}
483
484		3	return 0;
485			}
486
487		✗	static void codec33_gen_tiles(SANMVideoContext *ctx, int8_t param1)
488			{
489		✗	uint8_t *dst = &(ctx->c4tbl[0][0][0]);
490			int i, j, k, l, m, n, o, p;
491
492		✗	for (i = 0; i < 8; i++) {
493		✗	for (k = 0; k < 8; k++) {
494		✗	j = i + param1;
495		✗	l = k + param1;
496		✗	p = (j + k) / 2;
497		✗	j = (j + p) / 2;
498		✗	m = l / 2;
499		✗	n = (i + param1);
500		✗	o = (k + param1);
501
502		✗	*dst++ = p; *dst++ = p; *dst++ = j; *dst++ = n;
503		✗	*dst++ = p; *dst++ = p; *dst++ = j; *dst++ = i;
504		✗	*dst++ = m; *dst++ = m; *dst++ = p; *dst++ = j;
505		✗	*dst++ = l; *dst++ = l; *dst++ = m; *dst++ = p;
506			}
507			}
508
509		✗	for (i = 0; i < 8; i++) {
510		✗	for (k = 0; k < 8; k++) {
511		✗	j = i + param1;
512		✗	l = k + param1;
513		✗	n = ((j + l) / 2);
514		✗	m = ((l + n) / 2);
515
516		✗	*dst++ = j; *dst++ = j; *dst++ = j; *dst++ = j;
517		✗	*dst++ = n; *dst++ = n; *dst++ = n; *dst++ = n;
518		✗	*dst++ = m; *dst++ = m; *dst++ = m; *dst++ = m;
519		✗	*dst++ = l; *dst++ = l; *dst++ = l; *dst++ = l;
520			}
521			}
522
523		✗	for (i = 0; i < 8; i++) {
524		✗	for (k = 0; k < 8; k++) {
525		✗	j = i + param1;
526		✗	l = k + param1;
527		✗	m = (j + l) / 2;
528		✗	n = (j + m) / 2;
529		✗	o = m / 2;
530		✗	p = j & 0xff;
531
532		✗	*dst++ = p; *dst++ = p; *dst++ = n; *dst++ = m;
533		✗	*dst++ = p; *dst++ = p; *dst++ = n; *dst++ = m;
534		✗	*dst++ = n; *dst++ = n; *dst++ = m; *dst++ = o;
535		✗	*dst++ = m; *dst++ = m; *dst++ = o; *dst++ = l;
536			}
537			}
538
539		✗	for (i = 0; i < 8; i++) {
540		✗	for (k = 0; k < 8; k++) {
541		✗	j = i + param1;
542		✗	l = k + param1;
543		✗	m = (j + l) / 2;
544		✗	n = m / 2;
545
546		✗	*dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l;
547		✗	*dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l;
548		✗	*dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l;
549		✗	*dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l;
550			}
551			}
552		✗	}
553
554		✗	static void codec4_gen_tiles(SANMVideoContext *ctx, uint16_t param1)
555			{
556		✗	uint8_t *dst = &(ctx->c4tbl[0][0][0]);
557			int i, j, k, l, m, n, o;
558
559		✗	for (i = 1; i < 16; i += 2) {
560		✗	for (k = 0; k < 16; k++) {
561		✗	j = i + param1;
562		✗	l = k + param1;
563		✗	m = (j + l) / 2;
564		✗	n = (j + m) / 2;
565		✗	o = (l + m) / 2;
566		✗	if (j == m || l == m) {
567		✗	*dst++ = l; *dst++ = j; *dst++ = l; *dst++ = j;
568		✗	*dst++ = j; *dst++ = l; *dst++ = j; *dst++ = j;
569		✗	*dst++ = l; *dst++ = j; *dst++ = l; *dst++ = j;
570		✗	*dst++ = l; *dst++ = l; *dst++ = j; *dst++ = l;
571			} else {
572		✗	*dst++ = m; *dst++ = m; *dst++ = n; *dst++ = j;
573		✗	*dst++ = m; *dst++ = m; *dst++ = n; *dst++ = j;
574		✗	*dst++ = o; *dst++ = o; *dst++ = m; *dst++ = n;
575		✗	*dst++ = l; *dst++ = l; *dst++ = o; *dst++ = m;
576			}
577			}
578			}
579
580		✗	for (i = 0; i < 16; i += 2) {
581		✗	for (k = 0; k < 16; k++) {
582		✗	j = i + param1;
583		✗	l = k + param1;
584		✗	m = (j + l) / 2;
585		✗	n = (j + m) / 2;
586		✗	o = (l + m) / 2;
587		✗	if (m == j || m == l) {
588		✗	*dst++ = j; *dst++ = j; *dst++ = l; *dst++ = j;
589		✗	*dst++ = j; *dst++ = j; *dst++ = j; *dst++ = l;
590		✗	*dst++ = l; *dst++ = j; *dst++ = l; *dst++ = l;
591		✗	*dst++ = j; *dst++ = l; *dst++ = j; *dst++ = l;
592			} else {
593		✗	*dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m;
594		✗	*dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m;
595		✗	*dst++ = n; *dst++ = n; *dst++ = m; *dst++ = o;
596		✗	*dst++ = m; *dst++ = m; *dst++ = o; *dst++ = l;
597			}
598			}
599			}
600		✗	}
601
602
603		✗	static int codec4_load_tiles(SANMVideoContext *ctx, GetByteContext *gb,
604			uint16_t param2, uint8_t clr)
605			{
606		✗	uint8_t c, *dst = (uint8_t *)&(ctx->c4tbl[1][0][0]);
607		✗	uint32_t loop = param2 * 8;
608
609		✗	if ((param2 > 256) || (bytestream2_get_bytes_left(gb) < loop))
610		✗	return AVERROR_INVALIDDATA;
611
612		✗	while (loop--) {
613		✗	c = bytestream2_get_byteu(gb);
614		✗	*dst++ = (c >> 4) + clr;
615		✗	*dst++ = (c & 0xf) + clr;
616			}
617
618		✗	return 0;
619			}
620
621		9	static void rotate_bufs(SANMVideoContext *ctx, int rotate_code)
622			{
623	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 8 times.	9	if (rotate_code == 2)
624		1	FFSWAP(uint16_t*, ctx->frm1, ctx->frm2);
625		9	FFSWAP(uint16_t*, ctx->frm2, ctx->frm0);
626		9	}
627
628		3	static av_cold int decode_init(AVCodecContext *avctx)
629			{
630		3	SANMVideoContext *ctx = avctx->priv_data;
631
632		3	ctx->avctx = avctx;
633		3	ctx->version = !avctx->extradata_size;
634			// early sanity check before allocations to avoid need for deallocation code.
635	1/4 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times. ✗ Branch 2 not taken. ✗ Branch 3 not taken.	3	if (!ctx->version && avctx->extradata_size < 1026) {
636		✗	av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n");
637		✗	return AVERROR_INVALIDDATA;
638			}
639
640	1/2 ✓ Branch 0 taken 3 times. ✗ Branch 1 not taken.	3	avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8;
641
642		3	init_sizes(ctx, avctx->width, avctx->height);
643	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3 times.	3	if (init_buffers(ctx)) {
644		✗	av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n");
645		✗	return AVERROR(ENOMEM);
646			}
647
648		3	make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4);
649		3	make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8);
650
651	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3 times.	3	if (!ctx->version) {
652			int i;
653
654		✗	ctx->subversion = AV_RL16(avctx->extradata);
655		✗	for (i = 0; i < PALETTE_SIZE; i++)
656		✗	ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4);
657		✗	if (ctx->subversion < 2)
658		✗	ctx->pal[0] = 0xFFU << 24;
659			}
660		3	ctx->c4param = 0xffff;
661
662		3	return 0;
663			}
664
665		3	static av_cold int decode_end(AVCodecContext *avctx)
666			{
667		3	SANMVideoContext *ctx = avctx->priv_data;
668
669		3	destroy_buffers(ctx);
670
671		3	return 0;
672			}
673
674		✗	static int old_codec4(SANMVideoContext *ctx, GetByteContext *gb, int top, int left,
675			int w, int h, uint8_t param, uint16_t param2, int codec)
676			{
677		✗	const uint16_t p = ctx->pitch;
678		✗	const uint32_t maxpxo = ctx->height * p;
679		✗	uint8_t mask, bits, idx, *gs, *dst = (uint8_t *)ctx->fbuf;
680			int i, j, k, l, bit, ret;
681			int32_t pxoff, pxo2;
682
683		✗	if (ctx->c4param != param) {
684		✗	if (codec > 32)
685		✗	codec33_gen_tiles(ctx, param);
686			else
687		✗	codec4_gen_tiles(ctx, param);
688		✗	ctx->c4param = param;
689			}
690		✗	if (param2 > 0) {
691		✗	ret = codec4_load_tiles(ctx, gb, param2, param);
692		✗	if (ret)
693		✗	return ret;
694			}
695
696		✗	if (codec > 32)
697		✗	codec -= 29;
698
699		✗	for (j = 0; j < w; j += 4) {
700		✗	mask = bits = 0;
701		✗	for (i = 0; i < h; i += 4) {
702		✗	pxoff = j + left + ((top + i) * p);
703		✗	if (param2 > 0) {
704		✗	if (bits == 0) {
705		✗	if (bytestream2_get_bytes_left(gb) < 1)
706		✗	return AVERROR_INVALIDDATA;
707		✗	mask = bytestream2_get_byteu(gb);
708		✗	bits = 8;
709			}
710		✗	bit = !!(mask & 0x80);
711		✗	mask <<= 1;
712		✗	bits--;
713			} else {
714		✗	bit = 0;
715			}
716
717		✗	if (bytestream2_get_bytes_left(gb) < 1)
718		✗	return AVERROR_INVALIDDATA;
719		✗	idx = bytestream2_get_byteu(gb);
720		✗	if ((bit == 0) && (idx == 0x80) && (codec != 5))
721		✗	continue;
722
723		✗	gs = &(ctx->c4tbl[bit][idx][0]);
724		✗	pxo2 = pxoff;
725		✗	for (k = 0; k < 4; k++) {
726		✗	for (l = 0; l < 4; l++) {
727		✗	if (pxo2 >= 0 && pxo2 < maxpxo) {
728		✗	*(dst + pxo2) = *gs;
729			}
730		✗	gs++;
731		✗	pxo2++;
732			}
733		✗	pxo2 = pxo2 - 4 + p;
734			}
735
736			/* smooth top and left block borders with neighbours */
737		✗	if (((pxoff - p + k) < 0) || ((pxoff - p + k) >= maxpxo)
738		✗	|| ((pxoff + 3 * p) < 0) || ((pxoff + 3 * p) >= maxpxo)
739		✗	|| (i == 0) || (j == 0))
740		✗	continue;
741		✗	if (param & 0x80) {
742		✗	for (k = 0; k < 4; k++)
743		✗	*(dst + pxoff + k) = ((*(dst + pxoff + k) + *(dst + pxoff - p + k)) >> 1) | 0x80;
744		✗	*(dst + pxoff + 1 * p) = (*(dst + pxoff + 1 * p) + *(dst + pxoff + 1 * p - 1)) >> 1 | 0x80;
745		✗	*(dst + pxoff + 2 * p) = (*(dst + pxoff + 2 * p) + *(dst + pxoff + 2 * p - 1)) >> 1 | 0x80;
746		✗	*(dst + pxoff + 3 * p) = (*(dst + pxoff + 3 * p) + *(dst + pxoff + 3 * p - 1)) >> 1 | 0x80;
747			} else {
748		✗	for (k = 0; k < 4; k++)
749		✗	*(dst + pxoff + k) = ((*(dst + pxoff + k) + *(dst + pxoff - p + k)) >> 1) & 0x7f;
750		✗	*(dst + pxoff + 1 * p) = (*(dst + pxoff + 1 * p) + *(dst + pxoff + 1 * p - 1)) >> 1;
751		✗	*(dst + pxoff + 2 * p) = (*(dst + pxoff + 2 * p) + *(dst + pxoff + 2 * p - 1)) >> 1;
752		✗	*(dst + pxoff + 3 * p) = (*(dst + pxoff + 3 * p) + *(dst + pxoff + 3 * p - 1)) >> 1;
753			}
754			}
755			}
756		✗	return 0;
757			}
758
759		1	static int rle_decode(SANMVideoContext *ctx, GetByteContext *gb, uint8_t *dst, const int out_size)
760			{
761		1	int opcode, color, run_len, left = out_size;
762
763	2/2 ✓ Branch 0 taken 4800 times. ✓ Branch 1 taken 1 times.	4801	while (left > 0) {
764		4800	opcode = bytestream2_get_byte(gb);
765		4800	run_len = (opcode >> 1) + 1;
766	2/4 ✓ Branch 0 taken 4800 times. ✗ Branch 1 not taken. ✗ Branch 3 not taken. ✓ Branch 4 taken 4800 times.	4800	if (run_len > left || bytestream2_get_bytes_left(gb) <= 0)
767		✗	return AVERROR_INVALIDDATA;
768
769	1/2 ✓ Branch 0 taken 4800 times. ✗ Branch 1 not taken.	4800	if (opcode & 1) {
770		4800	color = bytestream2_get_byte(gb);
771		4800	memset(dst, color, run_len);
772			} else {
773		✗	if (bytestream2_get_bytes_left(gb) < run_len)
774		✗	return AVERROR_INVALIDDATA;
775		✗	bytestream2_get_bufferu(gb, dst, run_len);
776			}
777
778		4800	dst += run_len;
779		4800	left -= run_len;
780			}
781
782		1	return 0;
783			}
784
785		✗	static int old_codec23(SANMVideoContext *ctx, GetByteContext *gb, int top, int left,
786			int width, int height, uint8_t param, uint16_t param2)
787			{
788		✗	const uint32_t maxpxo = ctx->height * ctx->pitch;
789			uint8_t *dst, lut[256], c;
790			int i, j, k, pc, sk;
791			int32_t pxoff;
792
793		✗	if (ctx->subversion < 2) {
794			/* Rebel Assault 1: constant offset + 0xd0 */
795		✗	for (i = 0; i < 256; i++)
796		✗	lut[i] = (i + param + 0xd0) & 0xff;
797		✗	} else if (param2 == 256) {
798		✗	if (bytestream2_get_bytes_left(gb) < 256)
799		✗	return AVERROR_INVALIDDATA;
800		✗	bytestream2_get_bufferu(gb, ctx->c23lut, 256);
801		✗	} else if (param2 < 256) {
802		✗	for (i = 0; i < 256; i++)
803		✗	lut[i] = (i + param2) & 0xff;
804			} else {
805		✗	memcpy(lut, ctx->c23lut, 256);
806			}
807		✗	if (bytestream2_get_bytes_left(gb) < 1)
808		✗	return 0; /* some c23 frames just set up the LUT */
809
810		✗	dst = (uint8_t *)ctx->fbuf;
811		✗	for (i = 0; i < height; i++) {
812		✗	if (bytestream2_get_bytes_left(gb) < 2)
813		✗	return 0;
814		✗	pxoff = left + ((top + i) * ctx->pitch);
815		✗	k = bytestream2_get_le16u(gb);
816		✗	sk = 1;
817		✗	pc = 0;
818		✗	while (k > 0 && pc <= width) {
819		✗	if (bytestream2_get_bytes_left(gb) < 1)
820		✗	return AVERROR_INVALIDDATA;
821		✗	j = bytestream2_get_byteu(gb);
822		✗	if (sk) {
823		✗	pxoff += j;
824		✗	pc += j;
825			} else {
826		✗	while (j--) {
827		✗	if (pxoff >=0 && pxoff < maxpxo) {
828		✗	c = *(dst + pxoff);
829		✗	*(dst + pxoff) = lut[c];
830			}
831		✗	pxoff++;
832		✗	pc++;
833			}
834			}
835		✗	sk ^= 1;
836			}
837			}
838		✗	return 0;
839			}
840
841		✗	static int old_codec21(SANMVideoContext *ctx, GetByteContext *gb, int top, int left,
842			int width, int height)
843			{
844		✗	const uint32_t maxpxo = ctx->height * ctx->pitch;
845		✗	uint8_t *dst = (uint8_t *)ctx->fbuf, c;
846			int i, j, k, pc, sk, pxoff;
847
848		✗	dst = (uint8_t *)ctx->fbuf;
849		✗	for (i = 0; i < height; i++) {
850		✗	if (bytestream2_get_bytes_left(gb) < 2)
851		✗	return 0;
852		✗	pxoff = left + ((top + i) * ctx->pitch);
853		✗	k = bytestream2_get_le16u(gb);
854		✗	sk = 1;
855		✗	pc = 0;
856		✗	while (k > 0 && pc <= width) {
857		✗	if (bytestream2_get_bytes_left(gb) < 2)
858		✗	return AVERROR_INVALIDDATA;
859		✗	j = bytestream2_get_le16u(gb);
860		✗	k -= 2;
861		✗	if (sk) {
862		✗	pxoff += j;
863		✗	pc += j;
864			} else {
865		✗	if (bytestream2_get_bytes_left(gb) < (j + 1))
866		✗	return AVERROR_INVALIDDATA;
867			do {
868		✗	c = bytestream2_get_byteu(gb);
869		✗	if (pxoff >=0 && pxoff < maxpxo) {
870		✗	*(dst + pxoff) = c;
871			}
872		✗	pxoff++;
873		✗	pc++;
874		✗	j--;
875		✗	k--;
876		✗	} while (j > -1);
877			}
878		✗	sk ^= 1;
879			}
880			}
881		✗	return 0;
882			}
883
884		✗	static int old_codec1(SANMVideoContext *ctx, GetByteContext *gb, int top,
885			int left, int width, int height, int opaque)
886			{
887			int i, j, len, flag, code, val, end, pxoff;
888		✗	const int maxpxo = ctx->height * ctx->pitch;
889		✗	uint8_t *dst = (uint8_t *)ctx->fbuf;
890
891		✗	for (i = 0; i < height; i++) {
892		✗	if (bytestream2_get_bytes_left(gb) < 2)
893		✗	return AVERROR_INVALIDDATA;
894
895		✗	len = bytestream2_get_le16u(gb);
896		✗	end = bytestream2_tell(gb) + len;
897
898		✗	pxoff = left + ((top + i) * ctx->pitch);
899		✗	while (bytestream2_tell(gb) < end) {
900		✗	if (bytestream2_get_bytes_left(gb) < 2)
901		✗	return AVERROR_INVALIDDATA;
902
903		✗	code = bytestream2_get_byteu(gb);
904		✗	flag = code & 1;
905		✗	code = (code >> 1) + 1;
906		✗	if (flag) {
907		✗	val = bytestream2_get_byteu(gb);
908		✗	if (val || opaque) {
909		✗	for (j = 0; j < code; j++) {
910		✗	if (pxoff >= 0 && pxoff < maxpxo)
911		✗	*(dst + pxoff) = val;
912		✗	pxoff++;
913			}
914			} else {
915		✗	pxoff += code;
916			}
917			} else {
918		✗	if (bytestream2_get_bytes_left(gb) < code)
919		✗	return AVERROR_INVALIDDATA;
920		✗	for (j = 0; j < code; j++) {
921		✗	val = bytestream2_get_byteu(gb);
922		✗	if ((pxoff >= 0) && (pxoff < maxpxo) && (val || opaque))
923		✗	*(dst + pxoff) = val;
924		✗	pxoff++;
925			}
926			}
927			}
928			}
929		✗	ctx->rotate_code = 0;
930
931		✗	return 0;
932			}
933
934		✗	static int old_codec2(SANMVideoContext *ctx, GetByteContext *gb, int top,
935			int left, int width, int height)
936			{
937		✗	uint8_t *dst = (uint8_t *)ctx->fbuf, col;
938		✗	int16_t xpos = left, ypos = top;
939
940		✗	while (bytestream2_get_bytes_left(gb) > 3) {
941		✗	xpos += bytestream2_get_le16u(gb);
942		✗	ypos += bytestream2_get_byteu(gb);
943		✗	col = bytestream2_get_byteu(gb);
944		✗	if (xpos >= 0 && ypos >= 0 &&
945		✗	xpos < ctx->width && ypos < ctx->height) {
946		✗	*(dst + xpos + ypos * ctx->pitch) = col;
947			}
948			}
949		✗	return 0;
950			}
951
952		✗	static int old_codec20(SANMVideoContext *ctx, int w, int h)
953			{
954		✗	uint8_t *dst = (uint8_t *)ctx->fbuf;
955
956		✗	if (bytestream2_get_bytes_left(&ctx->gb) < w * h)
957		✗	return AVERROR_INVALIDDATA;
958
959		✗	if (w == ctx->pitch) {
960		✗	bytestream2_get_bufferu(&ctx->gb, dst, w * h);
961			} else {
962		✗	for (int i = 0; i < h; i++) {
963		✗	bytestream2_get_bufferu(&ctx->gb, dst, w);
964		✗	dst += ctx->pitch;
965			}
966			}
967		✗	return 0;
968			}
969
970		✗	static inline void codec37_mv(uint8_t *dst, const uint8_t *src,
971			int height, int stride, int x, int y)
972			{
973			int pos, i, j;
974
975		✗	pos = x + y * stride;
976		✗	for (j = 0; j < 4; j++) {
977		✗	for (i = 0; i < 4; i++) {
978		✗	if ((pos + i) < 0 || (pos + i) >= height * stride)
979		✗	dst[i] = 0;
980			else
981		✗	dst[i] = src[i];
982			}
983		✗	dst += stride;
984		✗	src += stride;
985		✗	pos += stride;
986			}
987		✗	}
988
989		✗	static int old_codec37(SANMVideoContext *ctx, int width, int height)
990			{
991			int i, j, k, l, t, run, len, code, skip, mx, my;
992		✗	ptrdiff_t stride = ctx->pitch;
993			uint8_t *dst, *prev;
994		✗	int skip_run = 0;
995		✗	int compr = bytestream2_get_byte(&ctx->gb);
996		✗	int mvoff = bytestream2_get_byte(&ctx->gb);
997		✗	int seq = bytestream2_get_le16(&ctx->gb);
998		✗	uint32_t decoded_size = bytestream2_get_le32(&ctx->gb);
999			int flags;
1000
1001		✗	bytestream2_skip(&ctx->gb, 4);
1002		✗	flags = bytestream2_get_byte(&ctx->gb);
1003		✗	bytestream2_skip(&ctx->gb, 3);
1004
1005		✗	if (decoded_size > ctx->height * stride) {
1006		✗	decoded_size = ctx->height * stride;
1007		✗	av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
1008			}
1009
1010		✗	ctx->rotate_code = 0;
1011
1012		✗	if (((seq & 1) || !(flags & 1)) && (compr && compr != 2)) {
1013		✗	FFSWAP(uint16_t*, ctx->frm0, ctx->frm2);
1014			}
1015
1016		✗	dst = ((uint8_t*)ctx->frm0);
1017		✗	prev = ((uint8_t*)ctx->frm2);
1018
1019		✗	if (mvoff > 2) {
1020		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff);
1021		✗	return AVERROR_INVALIDDATA;
1022			}
1023
1024		✗	switch (compr) {
1025		✗	case 0:
1026		✗	for (i = 0; i < height; i++) {
1027		✗	bytestream2_get_buffer(&ctx->gb, dst, width);
1028		✗	dst += stride;
1029			}
1030		✗	memset(ctx->frm2, 0, ctx->height * stride);
1031		✗	break;
1032		✗	case 1:
1033		✗	run = 0;
1034		✗	len = -1;
1035		✗	code = 0;
1036
1037		✗	for (j = 0; j < height; j += 4) {
1038		✗	for (i = 0; i < width; i += 4) {
1039		✗	if (len < 0) {
1040		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1041		✗	return AVERROR_INVALIDDATA;
1042		✗	code = bytestream2_get_byte(&ctx->gb);
1043		✗	len = code >> 1;
1044		✗	run = code & 1;
1045		✗	skip = 0;
1046			} else {
1047		✗	skip = run;
1048			}
1049
1050		✗	if (!skip) {
1051		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1052		✗	return AVERROR_INVALIDDATA;
1053		✗	code = bytestream2_get_byte(&ctx->gb);
1054		✗	if (code == 0xff) {
1055		✗	len--;
1056		✗	for (k = 0; k < 4; k++) {
1057		✗	for (l = 0; l < 4; l++) {
1058		✗	if (len < 0) {
1059		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1060		✗	return AVERROR_INVALIDDATA;
1061		✗	code = bytestream2_get_byte(&ctx->gb);
1062		✗	len = code >> 1;
1063		✗	run = code & 1;
1064		✗	if (run) {
1065		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1066		✗	return AVERROR_INVALIDDATA;
1067		✗	code = bytestream2_get_byte(&ctx->gb);
1068			}
1069			}
1070		✗	if (!run) {
1071		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1072		✗	return AVERROR_INVALIDDATA;
1073		✗	code = bytestream2_get_byte(&ctx->gb);
1074			}
1075		✗	*(dst + i + (k * stride) + l) = code;
1076		✗	len--;
1077			}
1078			}
1079		✗	continue;
1080			}
1081			}
1082			/* 4x4 block copy from prev with MV */
1083		✗	mx = c37_mv[(mvoff * 255 + code) * 2];
1084		✗	my = c37_mv[(mvoff * 255 + code) * 2 + 1];
1085		✗	codec37_mv(dst + i, prev + i + mx + my * stride,
1086			ctx->height, stride, i + mx, j + my);
1087		✗	len--;
1088			}
1089		✗	dst += stride * 4;
1090		✗	prev += stride * 4;
1091			}
1092		✗	break;
1093		✗	case 2:
1094		✗	if (rle_decode(ctx, &ctx->gb, dst, decoded_size))
1095		✗	return AVERROR_INVALIDDATA;
1096		✗	memset(ctx->frm2, 0, ctx->frm2_size);
1097		✗	break;
1098		✗	case 3:
1099			case 4:
1100		✗	for (j = 0; j < height; j += 4) {
1101		✗	for (i = 0; i < width; i += 4) {
1102			int code;
1103		✗	if (skip_run) {
1104		✗	skip_run--;
1105		✗	copy_block4(dst + i, prev + i, stride, stride, 4);
1106		✗	continue;
1107			}
1108		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1109		✗	return AVERROR_INVALIDDATA;
1110		✗	code = bytestream2_get_byteu(&ctx->gb);
1111		✗	if (code == 0xFF) {
1112		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 16)
1113		✗	return AVERROR_INVALIDDATA;
1114		✗	for (k = 0; k < 4; k++)
1115		✗	bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4);
1116		✗	} else if ((flags & 4) && (code == 0xFE)) {
1117		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1118		✗	return AVERROR_INVALIDDATA;
1119		✗	for (k = 0; k < 4; k++)
1120		✗	memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4);
1121		✗	} else if ((flags & 4) && (code == 0xFD)) {
1122		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1123		✗	return AVERROR_INVALIDDATA;
1124		✗	t = bytestream2_get_byteu(&ctx->gb);
1125		✗	for (k = 0; k < 4; k++)
1126		✗	memset(dst + i + k * stride, t, 4);
1127			} else {
1128		✗	mx = c37_mv[(mvoff * 255 + code) * 2];
1129		✗	my = c37_mv[(mvoff * 255 + code) * 2 + 1];
1130		✗	codec37_mv(dst + i, prev + i + mx + my * stride,
1131			ctx->height, stride, i + mx, j + my);
1132
1133		✗	if ((compr == 4) && (code == 0)) {
1134		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1135		✗	return AVERROR_INVALIDDATA;
1136		✗	skip_run = bytestream2_get_byteu(&ctx->gb);
1137			}
1138			}
1139			}
1140		✗	dst += stride * 4;
1141		✗	prev += stride * 4;
1142			}
1143		✗	break;
1144		✗	default:
1145		✗	avpriv_report_missing_feature(ctx->avctx,
1146			"Subcodec 37 compression %d", compr);
1147		✗	return AVERROR_PATCHWELCOME;
1148			}
1149
1150		✗	return 0;
1151			}
1152
1153		✗	static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1,
1154			uint8_t *prev2, int stride, int tbl, int size)
1155			{
1156			int code, k, t;
1157			uint8_t colors[2];
1158			int8_t *pglyph;
1159
1160		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1161		✗	return AVERROR_INVALIDDATA;
1162
1163		✗	code = bytestream2_get_byteu(&ctx->gb);
1164		✗	if (code >= 0xF8) {
1165		✗	switch (code) {
1166		✗	case 0xFF:
1167		✗	if (size == 2) {
1168		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1169		✗	return AVERROR_INVALIDDATA;
1170		✗	dst[0] = bytestream2_get_byteu(&ctx->gb);
1171		✗	dst[1] = bytestream2_get_byteu(&ctx->gb);
1172		✗	dst[0 + stride] = bytestream2_get_byteu(&ctx->gb);
1173		✗	dst[1 + stride] = bytestream2_get_byteu(&ctx->gb);
1174			} else {
1175		✗	size >>= 1;
1176		✗	if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
1177		✗	return AVERROR_INVALIDDATA;
1178		✗	if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
1179			stride, tbl, size))
1180		✗	return AVERROR_INVALIDDATA;
1181		✗	dst += size * stride;
1182		✗	prev1 += size * stride;
1183		✗	prev2 += size * stride;
1184		✗	if (process_block(ctx, dst, prev1, prev2, stride, tbl, size))
1185		✗	return AVERROR_INVALIDDATA;
1186		✗	if (process_block(ctx, dst + size, prev1 + size, prev2 + size,
1187			stride, tbl, size))
1188		✗	return AVERROR_INVALIDDATA;
1189			}
1190		✗	break;
1191		✗	case 0xFE:
1192		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1193		✗	return AVERROR_INVALIDDATA;
1194
1195		✗	t = bytestream2_get_byteu(&ctx->gb);
1196		✗	for (k = 0; k < size; k++)
1197		✗	memset(dst + k * stride, t, size);
1198		✗	break;
1199		✗	case 0xFD:
1200		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 3)
1201		✗	return AVERROR_INVALIDDATA;
1202
1203		✗	code = bytestream2_get_byteu(&ctx->gb);
1204		✗	pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code];
1205		✗	bytestream2_get_bufferu(&ctx->gb, colors, 2);
1206
1207		✗	for (k = 0; k < size; k++)
1208		✗	for (t = 0; t < size; t++)
1209		✗	dst[t + k * stride] = colors[!*pglyph++];
1210		✗	break;
1211		✗	case 0xFC:
1212		✗	for (k = 0; k < size; k++)
1213		✗	memcpy(dst + k * stride, prev1 + k * stride, size);
1214		✗	break;
1215		✗	default:
1216		✗	k = bytestream2_tell(&ctx->gb);
1217		✗	bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET);
1218		✗	t = bytestream2_get_byte(&ctx->gb);
1219		✗	bytestream2_seek(&ctx->gb, k, SEEK_SET);
1220		✗	for (k = 0; k < size; k++)
1221		✗	memset(dst + k * stride, t, size);
1222			}
1223			} else {
1224		✗	int mx = motion_vectors[code][0];
1225		✗	int my = motion_vectors[code][1];
1226		✗	int index = prev2 - (const uint8_t *)ctx->frm2;
1227
1228			av_assert2(index >= 0 && index < (ctx->buf_size >> 1));
1229
1230		✗	if (index < -mx - my * stride ||
1231		✗	(ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) {
1232		✗	av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n");
1233		✗	return AVERROR_INVALIDDATA;
1234			}
1235
1236		✗	for (k = 0; k < size; k++)
1237		✗	memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size);
1238			}
1239
1240		✗	return 0;
1241			}
1242
1243		✗	static void codec47_read_interptable(SANMVideoContext *ctx)
1244			{
1245		✗	uint8_t *p1, *p2, *itbl = ctx->c47itbl;
1246			int i, j;
1247
1248		✗	for (i = 0; i < 256; i++) {
1249		✗	p1 = p2 = itbl + i;
1250		✗	for (j = 256 - i; j; j--) {
1251		✗	*p1 = *p2 = bytestream2_get_byte(&ctx->gb);
1252		✗	p1 += 1;
1253		✗	p2 += 256;
1254			}
1255		✗	itbl += 256;
1256			}
1257		✗	}
1258
1259		✗	static void codec47_comp1(SANMVideoContext *ctx, uint8_t *dst_in, int width,
1260			int height, ptrdiff_t stride)
1261			{
1262		✗	uint8_t p1, *dst, *itbl = ctx->c47itbl;
1263			uint16_t px;
1264			int i, j;
1265
1266		✗	dst = dst_in + stride;
1267		✗	for (i = 0; i < height; i += 2) {
1268		✗	p1 = bytestream2_get_byte(&ctx->gb);
1269		✗	*dst++ = p1;
1270		✗	*dst++ = p1;
1271		✗	px = p1;
1272		✗	for (j = 2; j < width; j += 2) {
1273		✗	p1 = bytestream2_get_byte(&ctx->gb);
1274		✗	px = (px << 8) | p1;
1275		✗	*dst++ = itbl[px];
1276		✗	*dst++ = p1;
1277			}
1278		✗	dst += stride;
1279			}
1280
1281		✗	memcpy(dst_in, dst_in + stride, width);
1282		✗	dst = dst_in + stride + stride;
1283		✗	for (i = 2; i < height - 1; i += 2) {
1284		✗	for (j = 0; j < width; j++) {
1285		✗	px = (*(dst - stride) << 8) | *(dst + stride);
1286		✗	*dst++ = itbl[px];
1287			}
1288		✗	dst += stride;
1289			}
1290		✗	}
1291
1292		✗	static int old_codec47(SANMVideoContext *ctx, int width, int height)
1293			{
1294			uint32_t decoded_size;
1295			int i, j;
1296		✗	ptrdiff_t stride = ctx->pitch;
1297		✗	uint8_t *dst = (uint8_t *)ctx->frm0;
1298		✗	uint8_t *prev1 = (uint8_t *)ctx->frm1;
1299		✗	uint8_t *prev2 = (uint8_t *)ctx->frm2;
1300			uint8_t auxcol[2];
1301		✗	int tbl_pos = bytestream2_tell(&ctx->gb);
1302		✗	int seq = bytestream2_get_le16(&ctx->gb);
1303		✗	int compr = bytestream2_get_byte(&ctx->gb);
1304		✗	int new_rot = bytestream2_get_byte(&ctx->gb);
1305		✗	int skip = bytestream2_get_byte(&ctx->gb);
1306
1307		✗	bytestream2_skip(&ctx->gb, 7);
1308		✗	auxcol[0] = bytestream2_get_byteu(&ctx->gb);
1309		✗	auxcol[1] = bytestream2_get_byteu(&ctx->gb);
1310		✗	decoded_size = bytestream2_get_le32(&ctx->gb);
1311		✗	bytestream2_skip(&ctx->gb, 8);
1312
1313		✗	if (decoded_size > ctx->height * stride) {
1314		✗	decoded_size = ctx->height * stride;
1315		✗	av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n");
1316			}
1317
1318		✗	if (skip & 1) {
1319		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 0x8080)
1320		✗	return AVERROR_INVALIDDATA;
1321		✗	codec47_read_interptable(ctx);
1322			}
1323		✗	if (!seq) {
1324		✗	ctx->prev_seq = -1;
1325		✗	memset(prev1, auxcol[0], ctx->height * stride);
1326		✗	memset(prev2, auxcol[1], ctx->height * stride);
1327			}
1328
1329		✗	switch (compr) {
1330		✗	case 0:
1331		✗	if (bytestream2_get_bytes_left(&ctx->gb) < width * height)
1332		✗	return AVERROR_INVALIDDATA;
1333		✗	for (j = 0; j < height; j++) {
1334		✗	bytestream2_get_bufferu(&ctx->gb, dst, width);
1335		✗	dst += stride;
1336			}
1337		✗	break;
1338		✗	case 1:
1339		✗	if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1))
1340		✗	return AVERROR_INVALIDDATA;
1341		✗	codec47_comp1(ctx, dst, width, height, stride);
1342		✗	break;
1343		✗	case 2:
1344		✗	if (seq == ctx->prev_seq + 1) {
1345		✗	for (j = 0; j < height; j += 8) {
1346		✗	for (i = 0; i < width; i += 8)
1347		✗	if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride,
1348			tbl_pos + 8, 8))
1349		✗	return AVERROR_INVALIDDATA;
1350		✗	dst += stride * 8;
1351		✗	prev1 += stride * 8;
1352		✗	prev2 += stride * 8;
1353			}
1354			}
1355		✗	break;
1356		✗	case 3:
1357		✗	memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height);
1358		✗	break;
1359		✗	case 4:
1360		✗	memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height);
1361		✗	break;
1362		✗	case 5:
1363		✗	if (rle_decode(ctx, &ctx->gb, dst, decoded_size))
1364		✗	return AVERROR_INVALIDDATA;
1365		✗	break;
1366		✗	default:
1367		✗	avpriv_report_missing_feature(ctx->avctx,
1368			"Subcodec 47 compression %d", compr);
1369		✗	return AVERROR_PATCHWELCOME;
1370			}
1371		✗	if (seq == ctx->prev_seq + 1)
1372		✗	ctx->rotate_code = new_rot;
1373			else
1374		✗	ctx->rotate_code = 0;
1375		✗	ctx->prev_seq = seq;
1376
1377		✗	return 0;
1378			}
1379
1380			// scale 4x4 input block to an 8x8 output block
1381		✗	static void c48_4to8(uint8_t *dst, const uint8_t *src, const uint16_t w)
1382			{
1383			uint16_t p;
1384			// dst is always at least 16bit aligned
1385		✗	for (int i = 0; i < 4; i++) {
1386		✗	for (int j = 0; j < 8; j += 2) {
1387		✗	p = *src++;
1388		✗	p = (p << 8) | p;
1389		✗	*((uint16_t *)(dst + w * 0 + j)) = p;
1390		✗	*((uint16_t *)(dst + w * 1 + j)) = p;
1391			}
1392		✗	dst += w * 2;
1393			}
1394		✗	}
1395
1396		✗	static int codec48_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *db,
1397			const uint16_t w)
1398			{
1399			uint8_t opc, sb[16];
1400			int i, j, k, l;
1401			int16_t mvofs;
1402			uint32_t ofs;
1403
1404		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1405		✗	return 1;
1406
1407		✗	opc = bytestream2_get_byteu(&ctx->gb);
1408		✗	switch (opc) {
1409		✗	case 0xFF: // 1x1 -> 8x8 block scale
1410		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1411		✗	return 1;
1412
1413		✗	opc = bytestream2_get_byteu(&ctx->gb);
1414		✗	for (i = 0; i < 16; i++)
1415		✗	sb[i] = opc;
1416		✗	c48_4to8(dst, sb, w);
1417		✗	break;
1418		✗	case 0xFE: // 1x 8x8 copy from deltabuf, 16bit mv from source
1419		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 2)
1420		✗	return 1;
1421		✗	mvofs = bytestream2_get_le16(&ctx->gb);
1422		✗	for (i = 0; i < 8; i++) {
1423		✗	ofs = w * i;
1424		✗	for (k = 0; k < 8; k++)
1425		✗	*(dst + ofs + k) = *(db + ofs + k + mvofs);
1426			}
1427		✗	break;
1428		✗	case 0xFD: // 2x2 -> 8x8 block scale
1429		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1430		✗	return 1;
1431		✗	sb[ 5] = bytestream2_get_byteu(&ctx->gb);
1432		✗	sb[ 7] = bytestream2_get_byteu(&ctx->gb);
1433		✗	sb[13] = bytestream2_get_byteu(&ctx->gb);
1434		✗	sb[15] = bytestream2_get_byteu(&ctx->gb);
1435
1436		✗	sb[0] = sb[1] = sb[4] = sb[5];
1437		✗	sb[2] = sb[3] = sb[6] = sb[7];
1438		✗	sb[8] = sb[9] = sb[12] = sb[13];
1439		✗	sb[10] = sb[11] = sb[14] = sb[15];
1440		✗	c48_4to8(dst, sb, w);
1441		✗	break;
1442		✗	case 0xFC: // 4x copy 4x4 block, per-block c37_mv from source
1443		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1444		✗	return 1;
1445		✗	for (i = 0; i < 8; i += 4) {
1446		✗	for (k = 0; k < 8; k += 4) {
1447		✗	opc = bytestream2_get_byteu(&ctx->gb);
1448		✗	mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w);
1449		✗	for (j = 0; j < 4; j++) {
1450		✗	ofs = (w * (j + i)) + k;
1451		✗	for (l = 0; l < 4; l++)
1452		✗	*(dst + ofs + l) = *(db + ofs + l + mvofs);
1453			}
1454			}
1455			}
1456		✗	break;
1457		✗	case 0xFB: // Copy 4x 4x4 blocks, per-block mv from source
1458		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 8)
1459		✗	return 1;
1460		✗	for (i = 0; i < 8; i += 4) {
1461		✗	for (k = 0; k < 8; k += 4) {
1462		✗	mvofs = bytestream2_get_le16(&ctx->gb);
1463		✗	for (j = 0; j < 4; j++) {
1464		✗	ofs = (w * (j + i)) + k;
1465		✗	for (l = 0; l < 4; l++)
1466		✗	*(dst + ofs + l) = *(db + ofs + l + mvofs);
1467			}
1468			}
1469			}
1470		✗	break;
1471		✗	case 0xFA: // scale 4x4 input block to 8x8 dest block
1472		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 16)
1473		✗	return 1;
1474		✗	bytestream2_get_bufferu(&ctx->gb, sb, 16);
1475		✗	c48_4to8(dst, sb, w);
1476		✗	break;
1477		✗	case 0xF9: // 16x 2x2 copy from delta, per-block c37_mv from source
1478		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 16)
1479		✗	return 1;
1480		✗	for (i = 0; i < 8; i += 2) {
1481		✗	for (j = 0; j < 8; j += 2) {
1482		✗	ofs = (w * i) + j;
1483		✗	opc = bytestream2_get_byteu(&ctx->gb);
1484		✗	mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w);
1485		✗	for (l = 0; l < 2; l++) {
1486		✗	*(dst + ofs + l + 0) = *(db + ofs + l + 0 + mvofs);
1487		✗	*(dst + ofs + l + w) = *(db + ofs + l + w + mvofs);
1488			}
1489			}
1490			}
1491		✗	break;
1492		✗	case 0xF8: // 16x 2x2 blocks copy, 16bit mv from source
1493		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 32)
1494		✗	return 1;
1495		✗	for (i = 0; i < 8; i += 2) {
1496		✗	for (j = 0; j < 8; j += 2) {
1497		✗	ofs = w * i + j;
1498		✗	mvofs = bytestream2_get_le16(&ctx->gb);
1499		✗	for (l = 0; l < 2; l++) {
1500		✗	*(dst + ofs + l + 0) = *(db + ofs + l + 0 + mvofs);
1501		✗	*(dst + ofs + l + w) = *(db + ofs + l + w + mvofs);
1502			}
1503			}
1504			}
1505		✗	break;
1506		✗	case 0xF7: // copy 8x8 block from src to dest
1507		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 64)
1508		✗	return 1;
1509		✗	for (i = 0; i < 8; i++) {
1510		✗	ofs = i * w;
1511		✗	for (l = 0; l < 8; l++)
1512		✗	*(dst + ofs + l) = bytestream2_get_byteu(&ctx->gb);
1513			}
1514		✗	break;
1515		✗	default: // copy 8x8 block from prev, c37_mv from source
1516		✗	mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w);
1517		✗	for (i = 0; i < 8; i++) {
1518		✗	ofs = i * w;
1519		✗	for (l = 0; l < 8; l++)
1520		✗	*(dst + ofs + l) = *(db + ofs + l + mvofs);
1521			}
1522		✗	break;
1523			}
1524		✗	return 0;
1525			}
1526
1527		✗	static int old_codec48(SANMVideoContext *ctx, int width, int height)
1528			{
1529			uint8_t *dst, *prev;
1530		✗	int compr = bytestream2_get_byte(&ctx->gb);
1531		✗	int mvidx = bytestream2_get_byte(&ctx->gb);
1532		✗	int seq = bytestream2_get_le16(&ctx->gb);
1533		✗	uint32_t decoded_size = bytestream2_get_le32(&ctx->gb);
1534			int i, j, flags;
1535
1536			// all codec48 videos use 1, but just to be safe...
1537		✗	if (mvidx != 1) {
1538		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvidx);
1539		✗	return AVERROR_INVALIDDATA;
1540			}
1541
1542		✗	bytestream2_skip(&ctx->gb, 4);
1543		✗	flags = bytestream2_get_byte(&ctx->gb);
1544		✗	bytestream2_skip(&ctx->gb, 3);
1545
1546		✗	if (flags & 8) {
1547		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 0x8080)
1548		✗	return AVERROR_INVALIDDATA;
1549		✗	codec47_read_interptable(ctx);
1550			}
1551
1552		✗	dst = (uint8_t*)ctx->frm0;
1553		✗	prev = (uint8_t*)ctx->frm2;
1554
1555		✗	if (!seq) {
1556		✗	ctx->prev_seq = -1;
1557		✗	memset(prev, 0, ctx->aligned_height * width);
1558			}
1559
1560		✗	switch (compr) {
1561		✗	case 0:
1562		✗	if (bytestream2_get_bytes_left(&ctx->gb) < width * height)
1563		✗	return AVERROR_INVALIDDATA;
1564		✗	for (j = 0; j < height; j++) {
1565		✗	bytestream2_get_bufferu(&ctx->gb, dst, width);
1566		✗	dst += width;
1567			}
1568		✗	break;
1569		✗	case 2:
1570		✗	if (rle_decode(ctx, &ctx->gb, dst, decoded_size))
1571		✗	return AVERROR_INVALIDDATA;
1572		✗	break;
1573		✗	case 3:
1574		✗	if (seq == ctx->prev_seq + 1) {
1575		✗	for (j = 0; j < height; j += 8) {
1576		✗	for (i = 0; i < width; i += 8) {
1577		✗	if (codec48_block(ctx, dst + i, prev + i, width))
1578		✗	return AVERROR_INVALIDDATA;
1579			}
1580		✗	dst += width * 8;
1581		✗	prev += width * 8;
1582			}
1583			}
1584		✗	break;
1585		✗	case 5:
1586		✗	if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1))
1587		✗	return AVERROR_INVALIDDATA;
1588		✗	codec47_comp1(ctx, dst, width, height, width);
1589		✗	break;
1590		✗	case 6: // in some videos of "Star Wars - Making Magic", ignored.
1591		✗	break;
1592		✗	default:
1593		✗	avpriv_report_missing_feature(ctx->avctx,
1594			"Subcodec 48 compression %d", compr);
1595		✗	return AVERROR_PATCHWELCOME;
1596			}
1597		✗	ctx->rotate_code = 1; // swap frm[0] and frm[2]
1598		✗	ctx->prev_seq = seq;
1599		✗	return 0;
1600			}
1601
1602		✗	static int process_frame_obj(SANMVideoContext *ctx, GetByteContext *gb)
1603			{
1604			uint16_t w, h, parm2;
1605			uint8_t codec, param;
1606			int16_t left, top;
1607			int fsc, sote, ret;
1608
1609		✗	codec = bytestream2_get_byteu(gb);
1610		✗	param = bytestream2_get_byteu(gb);
1611		✗	left = bytestream2_get_le16u(gb);
1612		✗	top = bytestream2_get_le16u(gb);
1613		✗	w = bytestream2_get_le16u(gb);
1614		✗	h = bytestream2_get_le16u(gb);
1615		✗	bytestream2_skip(gb, 2);
1616		✗	parm2 = bytestream2_get_le16u(gb);
1617
1618		✗	if (w < 1 || h < 1 || w > 800 || h > 600 || left > 800 || top > 600) {
1619		✗	av_log(ctx->avctx, AV_LOG_WARNING,
1620			"ignoring invalid fobj dimensions: c%d %d %d @ %d %d\n",
1621			codec, w, h, left, top);
1622		✗	return 0;
1623			}
1624
1625			/* codecs with their own buffers */
1626		✗	fsc = (codec == 37 || codec == 47 || codec == 48);
1627
1628			/* special case for "Shadows of the Empire" videos */
1629		✗	sote = ((w == 640) && (h == 272) && (codec == 47));
1630		✗	if (sote)
1631		✗	left = top = 0;
1632
1633		✗	if (!ctx->have_dimensions) {
1634			int xres, yres;
1635		✗	if (ctx->subversion < 2) {
1636			/* Rebel Assault 1: 384x242 internal size */
1637		✗	xres = 384;
1638		✗	yres = 242;
1639		✗	ctx->have_dimensions = 1;
1640		✗	} else if (codec == 37 || codec == 47 || codec == 48) {
1641			/* these codecs work on full frames, trust their dimensions */
1642		✗	xres = w;
1643		✗	yres = h;
1644		✗	ctx->have_dimensions = 1;
1645			} else {
1646			/* detect common sizes */
1647		✗	xres = w + left;
1648		✗	yres = h + top;
1649		✗	if (sote) {
1650			/* SotE: has top=60 at all times to center video
1651			* inside the 640x480 game window
1652			*/
1653		✗	xres = w;
1654		✗	yres = h;
1655		✗	ctx->have_dimensions = 1;
1656		✗	} else if (((xres == 424) && (yres == 260)) || /* RA1 */
1657		✗	((xres == 320) && (yres == 200)) || /* ft/dig/... */
1658		✗	((xres == 640) && (yres == 480))) { /* ol/comi/mots... */
1659		✗	ctx->have_dimensions = 1;
1660			}
1661
1662		✗	xres = FFMAX(xres, ctx->width);
1663		✗	yres = FFMAX(yres, ctx->height);
1664			}
1665
1666		✗	if (ctx->width < xres || ctx->height < yres) {
1667		✗	int ret = ff_set_dimensions(ctx->avctx, xres, yres);
1668		✗	if (ret < 0)
1669		✗	return ret;
1670		✗	init_sizes(ctx, xres, yres);
1671		✗	if (init_buffers(ctx)) {
1672		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n");
1673		✗	return AVERROR(ENOMEM);
1674			}
1675			}
1676			} else {
1677		✗	if (((left + w > ctx->width) || (top + h > ctx->height)) && fsc) {
1678			/* correct unexpected overly large frames: this happens
1679			* for instance with The Dig's sq1.san video: it has a few
1680			* (all black) 640x480 frames halfway in, while the rest is
1681			* 320x200.
1682			*/
1683		✗	av_log(ctx->avctx, AV_LOG_WARNING,
1684			"resizing too large fobj: c%d %d %d @ %d %d\n", codec, w, h, left, top);
1685		✗	w = ctx->width;
1686		✗	h = ctx->height;
1687			}
1688			}
1689
1690			/* clear the main buffer on the first fob */
1691		✗	if (ctx->first_fob) {
1692		✗	ctx->first_fob = 0;
1693		✗	if (!fsc)
1694		✗	memset(ctx->fbuf, 0, ctx->frm0_size);
1695			}
1696
1697		✗	switch (codec) {
1698		✗	case 1:
1699			case 3:
1700		✗	return old_codec1(ctx, gb, top, left, w, h, codec == 3);
1701		✗	case 2:
1702		✗	return old_codec2(ctx, gb, top, left, w, h);
1703		✗	case 4:
1704			case 5:
1705			case 33:
1706			case 34:
1707		✗	return old_codec4(ctx, gb, top, left, w, h, param, parm2, codec);
1708		✗	case 20:
1709		✗	return old_codec20(ctx, w, h);
1710		✗	case 21:
1711		✗	return old_codec21(ctx, gb, top, left, w, h);
1712		✗	case 23:
1713		✗	return old_codec23(ctx, gb, top, left, w, h, param, parm2);
1714		✗	case 37:
1715		✗	ret = old_codec37(ctx, w, h); break;
1716		✗	case 45:
1717		✗	return 0;
1718		✗	case 47:
1719		✗	ret = old_codec47(ctx, w, h); break;
1720		✗	case 48:
1721		✗	ret = old_codec48(ctx, w, h); break;
1722		✗	default:
1723		✗	avpriv_request_sample(ctx->avctx, "Subcodec %d", codec);
1724		✗	ctx->frame->flags |= AV_FRAME_FLAG_CORRUPT;
1725		✗	return 0;
1726			}
1727		✗	if (ret)
1728		✗	return ret;
1729
1730			/* copy the codec37/47/48 result to main buffer */
1731		✗	if ((w == ctx->width) && (h == ctx->height)) {
1732		✗	memcpy(ctx->fbuf, ctx->frm0, ctx->fbuf_size);
1733			} else {
1734		✗	uint8_t *dst = (uint8_t *)ctx->fbuf + left + top * ctx->pitch;
1735		✗	const uint8_t *src = (uint8_t *)ctx->frm0;
1736		✗	const int cw = FFMIN(w, ctx->width - left);
1737		✗	const int ch = FFMIN(h, ctx->height - top);
1738		✗	if ((cw > 0) && (ch > 0) && (left >= 0) && (top >= 0)) {
1739		✗	for (int i = 0; i < ch; i++) {
1740		✗	memcpy(dst, src, cw);
1741		✗	dst += ctx->pitch;
1742		✗	src += w;
1743			}
1744			}
1745			}
1746		✗	return 0;
1747			}
1748
1749		✗	static int process_ftch(SANMVideoContext *ctx, int size)
1750			{
1751		✗	uint8_t *sf = ctx->stored_frame;
1752			int xoff, yoff, left, top, ret;
1753			GetByteContext gb;
1754			uint32_t sz;
1755
1756			/* FTCH defines additional x/y offsets */
1757		✗	if (size != 12) {
1758		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 6)
1759		✗	return AVERROR_INVALIDDATA;
1760		✗	bytestream2_skip(&ctx->gb, 2);
1761		✗	xoff = bytestream2_get_le16u(&ctx->gb);
1762		✗	yoff = bytestream2_get_le16u(&ctx->gb);
1763			} else {
1764		✗	if (bytestream2_get_bytes_left(&ctx->gb) < 12)
1765		✗	return AVERROR_INVALIDDATA;
1766		✗	bytestream2_skip(&ctx->gb, 4);
1767		✗	xoff = bytestream2_get_be32u(&ctx->gb);
1768		✗	yoff = bytestream2_get_be32u(&ctx->gb);
1769			}
1770
1771		✗	sz = *(uint32_t *)(sf + 0);
1772		✗	if ((sz > 0) && (sz <= ctx->stored_frame_size - 4)) {
1773			/* add the FTCH offsets to the left/top values of the stored FOBJ */
1774		✗	left = av_le2ne16(*(int16_t *)(sf + 4 + 2));
1775		✗	top = av_le2ne16(*(int16_t *)(sf + 4 + 4));
1776		✗	*(int16_t *)(sf + 4 + 2) = av_le2ne16(left + xoff);
1777		✗	*(int16_t *)(sf + 4 + 4) = av_le2ne16(top + yoff);
1778
1779			/* decode the stored FOBJ */
1780		✗	bytestream2_init(&gb, sf + 4, sz);
1781		✗	ret = process_frame_obj(ctx, &gb);
1782
1783			/* now restore the original left/top values again */
1784		✗	*(int16_t *)(sf + 4 + 2) = av_le2ne16(left);
1785		✗	*(int16_t *)(sf + 4 + 4) = av_le2ne16(top);
1786			} else {
1787			/* this happens a lot in RA1: The individual files are meant to
1788			* be played in sequence, with some referencing objects STORed
1789			* by previous files, e.g. the cockpit codec21 object in RA1 LVL8.
1790			* But spamming the log with errors is also not helpful, so
1791			* here we simply ignore this case.
1792			*/
1793		✗	ret = 0;
1794			}
1795		✗	return ret;
1796			}
1797
1798		✗	static int process_xpal(SANMVideoContext *ctx, int size)
1799			{
1800		✗	int16_t *dp = ctx->delta_pal;
1801		✗	uint32_t *pal = ctx->pal;
1802			uint16_t cmd;
1803			uint8_t c[3];
1804			int i, j;
1805
1806		✗	bytestream2_skip(&ctx->gb, 2);
1807		✗	cmd = bytestream2_get_be16(&ctx->gb);
1808
1809		✗	if (cmd == 1) {
1810		✗	for (i = 0; i < PALETTE_DELTA; i += 3) {
1811		✗	c[0] = (*pal >> 16) & 0xFF;
1812		✗	c[1] = (*pal >> 8) & 0xFF;
1813		✗	c[2] = (*pal >> 0) & 0xFF;
1814		✗	for (j = 0; j < 3; j++) {
1815		✗	int cl = (c[j] * 129) + *dp++;
1816		✗	c[j] = av_clip_uint8(cl / 128) & 0xFF;
1817			}
1818		✗	*pal++ = 0xFFU << 24 | c[0] << 16 | c[1] << 8 | c[2];
1819			}
1820		✗	} else if (cmd == 2) {
1821		✗	if (size < PALETTE_DELTA * 2 + 4) {
1822		✗	av_log(ctx->avctx, AV_LOG_ERROR,
1823			"Incorrect palette change block size %"PRIu32".\n", size);
1824		✗	return AVERROR_INVALIDDATA;
1825			}
1826		✗	for (i = 0; i < PALETTE_DELTA; i++)
1827		✗	dp[i] = bytestream2_get_le16u(&ctx->gb);
1828
1829		✗	if (size >= PALETTE_DELTA * 2 + 4 + PALETTE_SIZE * 3) {
1830		✗	for (i = 0; i < PALETTE_SIZE; i++)
1831		✗	ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
1832		✗	if (ctx->subversion < 2)
1833		✗	ctx->pal[0] = 0xFFU << 24;
1834			}
1835			}
1836		✗	return 0;
1837			}
1838
1839		✗	static int decode_0(SANMVideoContext *ctx)
1840			{
1841		✗	uint16_t *frm = ctx->frm0;
1842			int x, y;
1843
1844		✗	if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) {
1845		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n");
1846		✗	return AVERROR_INVALIDDATA;
1847			}
1848		✗	for (y = 0; y < ctx->height; y++) {
1849		✗	for (x = 0; x < ctx->width; x++)
1850		✗	frm[x] = bytestream2_get_le16u(&ctx->gb);
1851		✗	frm += ctx->pitch;
1852			}
1853		✗	return 0;
1854			}
1855
1856		✗	static int decode_nop(SANMVideoContext *ctx)
1857			{
1858		✗	avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type");
1859		✗	return AVERROR_PATCHWELCOME;
1860			}
1861
1862		42964	static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, ptrdiff_t pitch)
1863			{
1864		42964	uint8_t *dst = (uint8_t *)pdest;
1865		42964	uint8_t *src = (uint8_t *)psrc;
1866		42964	ptrdiff_t stride = pitch * 2;
1867
1868	3/4 ✓ Branch 0 taken 14526 times. ✓ Branch 1 taken 12400 times. ✓ Branch 2 taken 16038 times. ✗ Branch 3 not taken.	42964	switch (block_size) {
1869		14526	case 2:
1870		14526	copy_block4(dst, src, stride, stride, 2);
1871		14526	break;
1872		12400	case 4:
1873		12400	copy_block8(dst, src, stride, stride, 4);
1874		12400	break;
1875		16038	case 8:
1876		16038	copy_block16(dst, src, stride, stride, 8);
1877		16038	break;
1878			}
1879		42964	}
1880
1881		7913	static void fill_block(uint16_t *pdest, uint16_t color, int block_size, ptrdiff_t pitch)
1882			{
1883			int x, y;
1884
1885		7913	pitch -= block_size;
1886	2/2 ✓ Branch 0 taken 30438 times. ✓ Branch 1 taken 7913 times.	38351	for (y = 0; y < block_size; y++, pdest += pitch)
1887	2/2 ✓ Branch 0 taken 149540 times. ✓ Branch 1 taken 30438 times.	179978	for (x = 0; x < block_size; x++)
1888		149540	*pdest++ = color;
1889		7913	}
1890
1891		8368	static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index,
1892			uint16_t fg_color, uint16_t bg_color, int block_size,
1893			ptrdiff_t pitch)
1894			{
1895			int8_t *pglyph;
1896		8368	uint16_t colors[2] = { fg_color, bg_color };
1897			int x, y;
1898
1899	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 8368 times.	8368	if (index >= NGLYPHS) {
1900		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index);
1901		✗	return AVERROR_INVALIDDATA;
1902			}
1903
1904	2/2 ✓ Branch 0 taken 1158 times. ✓ Branch 1 taken 7210 times.	8368	pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index];
1905		8368	pitch -= block_size;
1906
1907	2/2 ✓ Branch 0 taken 38104 times. ✓ Branch 1 taken 8368 times.	46472	for (y = 0; y < block_size; y++, dst += pitch)
1908	2/2 ✓ Branch 0 taken 189472 times. ✓ Branch 1 taken 38104 times.	227576	for (x = 0; x < block_size; x++)
1909		189472	*dst++ = colors[*pglyph++];
1910		8368	return 0;
1911			}
1912
1913		8029	static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch)
1914			{
1915		8029	uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1916
1917	2/2 ✓ Branch 0 taken 825 times. ✓ Branch 1 taken 7204 times.	8029	if (block_size == 2) {
1918			uint32_t indices;
1919
1920	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 825 times.	825	if (bytestream2_get_bytes_left(&ctx->gb) < 4)
1921		✗	return AVERROR_INVALIDDATA;
1922
1923		825	indices = bytestream2_get_le32u(&ctx->gb);
1924		825	dst[0] = ctx->codebook[indices & 0xFF];
1925		825	indices >>= 8;
1926		825	dst[1] = ctx->codebook[indices & 0xFF];
1927		825	indices >>= 8;
1928		825	dst[pitch] = ctx->codebook[indices & 0xFF];
1929		825	indices >>= 8;
1930		825	dst[pitch + 1] = ctx->codebook[indices & 0xFF];
1931			} else {
1932			uint16_t fgcolor, bgcolor;
1933			int glyph;
1934
1935	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 7203 times.	7204	if (bytestream2_get_bytes_left(&ctx->gb) < 3)
1936		1	return AVERROR_INVALIDDATA;
1937
1938		7203	glyph = bytestream2_get_byteu(&ctx->gb);
1939		7203	bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1940		7203	fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
1941
1942		7203	draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1943			}
1944		8028	return 0;
1945			}
1946
1947		1169	static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch)
1948			{
1949		1169	uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch;
1950
1951	2/2 ✓ Branch 0 taken 4 times. ✓ Branch 1 taken 1165 times.	1169	if (block_size == 2) {
1952	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if (bytestream2_get_bytes_left(&ctx->gb) < 8)
1953		✗	return AVERROR_INVALIDDATA;
1954
1955		4	dst[0] = bytestream2_get_le16u(&ctx->gb);
1956		4	dst[1] = bytestream2_get_le16u(&ctx->gb);
1957		4	dst[pitch] = bytestream2_get_le16u(&ctx->gb);
1958		4	dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb);
1959			} else {
1960			uint16_t fgcolor, bgcolor;
1961			int glyph;
1962
1963	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1165 times.	1165	if (bytestream2_get_bytes_left(&ctx->gb) < 5)
1964		✗	return AVERROR_INVALIDDATA;
1965
1966		1165	glyph = bytestream2_get_byteu(&ctx->gb);
1967		1165	bgcolor = bytestream2_get_le16u(&ctx->gb);
1968		1165	fgcolor = bytestream2_get_le16u(&ctx->gb);
1969
1970		1165	draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch);
1971			}
1972		1169	return 0;
1973			}
1974
1975		30376	static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my,
1976			int block_size)
1977			{
1978		30376	int start_pos = cx + mx + (cy + my) * ctx->pitch;
1979		30376	int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1);
1980
1981	2/4 ✓ Branch 0 taken 30376 times. ✗ Branch 1 not taken. ✓ Branch 2 taken 30376 times. ✗ Branch 3 not taken.	30376	int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1);
1982
1983	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 30376 times.	30376	if (!good)
1984		✗	av_log(ctx->avctx, AV_LOG_ERROR,
1985			"Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n",
1986			cx + mx, cy + my, cx, cy, block_size);
1987
1988		30376	return good;
1989			}
1990
1991		71636	static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size)
1992			{
1993			int16_t mx, my, index;
1994			int opcode;
1995
1996	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 71635 times.	71636	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
1997		1	return AVERROR_INVALIDDATA;
1998
1999		71635	opcode = bytestream2_get_byteu(&ctx->gb);
2000
2001	9/9 ✓ Branch 0 taken 28212 times. ✓ Branch 1 taken 2164 times. ✓ Branch 2 taken 12588 times. ✓ Branch 3 taken 8029 times. ✓ Branch 4 taken 1169 times. ✓ Branch 5 taken 315 times. ✓ Branch 6 taken 5496 times. ✓ Branch 7 taken 2102 times. ✓ Branch 8 taken 11560 times.	71635	switch (opcode) {
2002		28212	default:
2003		28212	mx = motion_vectors[opcode][0];
2004		28212	my = motion_vectors[opcode][1];
2005
2006	1/2 ✓ Branch 1 taken 28212 times. ✗ Branch 2 not taken.	28212	if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
2007		28212	copy_block(ctx->frm0 + cx + ctx->pitch * cy,
2008		28212	ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
2009			blk_size, ctx->pitch);
2010			}
2011		28212	break;
2012		2164	case 0xF5:
2013	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2164 times.	2164	if (bytestream2_get_bytes_left(&ctx->gb) < 2)
2014		✗	return AVERROR_INVALIDDATA;
2015		2164	index = bytestream2_get_le16u(&ctx->gb);
2016
2017		2164	mx = index % ctx->width;
2018		2164	my = index / ctx->width;
2019
2020	1/2 ✓ Branch 1 taken 2164 times. ✗ Branch 2 not taken.	2164	if (good_mvec(ctx, cx, cy, mx, my, blk_size)) {
2021		2164	copy_block(ctx->frm0 + cx + ctx->pitch * cy,
2022		2164	ctx->frm2 + cx + mx + ctx->pitch * (cy + my),
2023			blk_size, ctx->pitch);
2024			}
2025		2164	break;
2026		12588	case 0xF6:
2027		12588	copy_block(ctx->frm0 + cx + ctx->pitch * cy,
2028		12588	ctx->frm1 + cx + ctx->pitch * cy,
2029			blk_size, ctx->pitch);
2030		12588	break;
2031		8029	case 0xF7:
2032		8029	opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch);
2033		8029	break;
2034
2035		1169	case 0xF8:
2036		1169	opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
2037		1169	break;
2038		315	case 0xF9:
2039			case 0xFA:
2040			case 0xFB:
2041			case 0xFC:
2042		315	fill_block(ctx->frm0 + cx + cy * ctx->pitch,
2043		315	ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch);
2044		315	break;
2045		5496	case 0xFD:
2046	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 5496 times.	5496	if (bytestream2_get_bytes_left(&ctx->gb) < 1)
2047		✗	return AVERROR_INVALIDDATA;
2048		10992	fill_block(ctx->frm0 + cx + cy * ctx->pitch,
2049		5496	ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch);
2050		5496	break;
2051		2102	case 0xFE:
2052	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 2102 times.	2102	if (bytestream2_get_bytes_left(&ctx->gb) < 2)
2053		✗	return AVERROR_INVALIDDATA;
2054		2102	fill_block(ctx->frm0 + cx + cy * ctx->pitch,
2055		2102	bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch);
2056		2102	break;
2057		11560	case 0xFF:
2058	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 11560 times.	11560	if (blk_size == 2) {
2059		✗	opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch);
2060			} else {
2061		11560	blk_size >>= 1;
2062	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 11560 times.	11560	if (codec2subblock(ctx, cx, cy, blk_size))
2063		✗	return AVERROR_INVALIDDATA;
2064	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 11560 times.	11560	if (codec2subblock(ctx, cx + blk_size, cy, blk_size))
2065		✗	return AVERROR_INVALIDDATA;
2066	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 11560 times.	11560	if (codec2subblock(ctx, cx, cy + blk_size, blk_size))
2067		✗	return AVERROR_INVALIDDATA;
2068	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 11560 times.	11560	if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size))
2069		✗	return AVERROR_INVALIDDATA;
2070			}
2071		11560	break;
2072			}
2073		71635	return 0;
2074			}
2075
2076		6	static int decode_2(SANMVideoContext *ctx)
2077			{
2078			int cx, cy, ret;
2079
2080	2/2 ✓ Branch 0 taken 318 times. ✓ Branch 1 taken 5 times.	323	for (cy = 0; cy < ctx->aligned_height; cy += 8)
2081	2/2 ✓ Branch 0 taken 25396 times. ✓ Branch 1 taken 317 times.	25713	for (cx = 0; cx < ctx->aligned_width; cx += 8)
2082	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 25395 times.	25396	if (ret = codec2subblock(ctx, cx, cy, 8))
2083		1	return ret;
2084
2085		5	return 0;
2086			}
2087
2088		✗	static int decode_3(SANMVideoContext *ctx)
2089			{
2090		✗	memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size);
2091		✗	return 0;
2092			}
2093
2094		9	static int decode_4(SANMVideoContext *ctx)
2095			{
2096		9	memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size);
2097		9	return 0;
2098			}
2099
2100		1	static int decode_5(SANMVideoContext *ctx)
2101			{
2102			#if HAVE_BIGENDIAN
2103			uint16_t *frm;
2104			int npixels;
2105			#endif
2106		1	uint8_t *dst = (uint8_t*)ctx->frm0;
2107
2108	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 1 times.	1	if (rle_decode(ctx, &ctx->gb, dst, ctx->buf_size))
2109		✗	return AVERROR_INVALIDDATA;
2110
2111			#if HAVE_BIGENDIAN
2112			npixels = ctx->npixels;
2113			frm = ctx->frm0;
2114			while (npixels--) {
2115			*frm = av_bswap16(*frm);
2116			frm++;
2117			}
2118			#endif
2119
2120		1	return 0;
2121			}
2122
2123		✗	static int decode_6(SANMVideoContext *ctx)
2124			{
2125		✗	int npixels = ctx->npixels;
2126		✗	uint16_t *frm = ctx->frm0;
2127
2128		✗	if (bytestream2_get_bytes_left(&ctx->gb) < npixels) {
2129		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n");
2130		✗	return AVERROR_INVALIDDATA;
2131			}
2132		✗	while (npixels--)
2133		✗	*frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)];
2134
2135		✗	return 0;
2136			}
2137
2138		✗	static int decode_8(SANMVideoContext *ctx)
2139			{
2140		✗	uint16_t *pdest = ctx->frm0;
2141			uint8_t *rsrc;
2142		✗	long npixels = ctx->npixels;
2143
2144		✗	av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels);
2145		✗	if (!ctx->rle_buf) {
2146		✗	av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n");
2147		✗	return AVERROR(ENOMEM);
2148			}
2149		✗	rsrc = ctx->rle_buf;
2150
2151		✗	if (rle_decode(ctx, &ctx->gb, rsrc, npixels))
2152		✗	return AVERROR_INVALIDDATA;
2153
2154		✗	while (npixels--)
2155		✗	*pdest++ = ctx->codebook[*rsrc++];
2156
2157		✗	return 0;
2158			}
2159
2160			typedef int (*frm_decoder)(SANMVideoContext *ctx);
2161
2162			static const frm_decoder v1_decoders[] = {
2163			decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5,
2164			decode_6, decode_nop, decode_8
2165			};
2166
2167		16	static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr)
2168			{
2169			int i, ret;
2170
2171	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) {
2172		✗	av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n",
2173			ret);
2174		✗	return AVERROR_INVALIDDATA;
2175			}
2176		16	bytestream2_skip(&ctx->gb, 8); // skip pad
2177
2178		16	hdr->width = bytestream2_get_le32u(&ctx->gb);
2179		16	hdr->height = bytestream2_get_le32u(&ctx->gb);
2180
2181	2/4 ✓ Branch 0 taken 16 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 16 times.	16	if (hdr->width != ctx->width || hdr->height != ctx->height) {
2182		✗	avpriv_report_missing_feature(ctx->avctx, "Variable size frames");
2183		✗	return AVERROR_PATCHWELCOME;
2184			}
2185
2186		16	hdr->seq_num = bytestream2_get_le16u(&ctx->gb);
2187		16	hdr->codec = bytestream2_get_byteu(&ctx->gb);
2188		16	hdr->rotate_code = bytestream2_get_byteu(&ctx->gb);
2189
2190		16	bytestream2_skip(&ctx->gb, 4); // skip pad
2191
2192	2/2 ✓ Branch 0 taken 64 times. ✓ Branch 1 taken 16 times.	80	for (i = 0; i < 4; i++)
2193		64	ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb);
2194		16	hdr->bg_color = bytestream2_get_le16u(&ctx->gb);
2195
2196		16	bytestream2_skip(&ctx->gb, 2); // skip pad
2197
2198		16	hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb);
2199	2/2 ✓ Branch 0 taken 4096 times. ✓ Branch 1 taken 16 times.	4112	for (i = 0; i < 256; i++)
2200		4096	ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb);
2201
2202		16	bytestream2_skip(&ctx->gb, 8); // skip pad
2203
2204		16	return 0;
2205			}
2206
2207		2	static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color)
2208			{
2209	1/2 ✓ Branch 0 taken 2 times. ✗ Branch 1 not taken.	2	if (buf_size--) {
2210		2	*pbuf++ = color;
2211		2	av_memcpy_backptr((uint8_t*)pbuf, 2, 2*buf_size);
2212			}
2213		2	}
2214
2215		15	static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr)
2216			{
2217			uint8_t *dst;
2218	1/2 ✓ Branch 0 taken 15 times. ✗ Branch 1 not taken.	15	const uint8_t *src = hdr ? (uint8_t *)ctx->frm0 : (uint8_t *)ctx->fbuf;
2219		15	int ret, height = ctx->height;
2220	1/2 ✓ Branch 0 taken 15 times. ✗ Branch 1 not taken.	15	ptrdiff_t dstpitch, srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1);
2221
2222	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 15 times.	15	if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0)
2223		✗	return ret;
2224
2225		15	dst = ctx->frame->data[0];
2226		15	dstpitch = ctx->frame->linesize[0];
2227
2228	2/2 ✓ Branch 0 taken 7200 times. ✓ Branch 1 taken 15 times.	7215	while (height--) {
2229		7200	memcpy(dst, src, srcpitch);
2230		7200	src += srcpitch;
2231		7200	dst += dstpitch;
2232			}
2233
2234		15	return 0;
2235			}
2236
2237		16	static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
2238			int *got_frame_ptr, AVPacket *pkt)
2239			{
2240		16	SANMVideoContext *ctx = avctx->priv_data;
2241			int i, ret;
2242
2243		16	ctx->frame = frame;
2244		16	bytestream2_init(&ctx->gb, pkt->data, pkt->size);
2245
2246	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 16 times.	16	if (!ctx->version) {
2247		✗	int to_store = 0, have_img = 0;
2248
2249		✗	ctx->first_fob = 1;
2250
2251		✗	while (bytestream2_get_bytes_left(&ctx->gb) >= 8) {
2252			uint32_t sig, size;
2253			int pos;
2254
2255		✗	sig = bytestream2_get_be32u(&ctx->gb);
2256		✗	size = bytestream2_get_be32u(&ctx->gb);
2257		✗	pos = bytestream2_tell(&ctx->gb);
2258
2259		✗	if (bytestream2_get_bytes_left(&ctx->gb) < size) {
2260		✗	av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size);
2261		✗	break;
2262			}
2263		✗	switch (sig) {
2264		✗	case MKBETAG('N', 'P', 'A', 'L'):
2265		✗	if (size != PALETTE_SIZE * 3) {
2266		✗	av_log(avctx, AV_LOG_ERROR,
2267			"Incorrect palette block size %"PRIu32".\n", size);
2268		✗	return AVERROR_INVALIDDATA;
2269			}
2270		✗	for (i = 0; i < PALETTE_SIZE; i++)
2271		✗	ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb);
2272		✗	if (ctx->subversion < 2)
2273		✗	ctx->pal[0] = 0xFFU << 24;
2274		✗	break;
2275		✗	case MKBETAG('F', 'O', 'B', 'J'):
2276		✗	if (size < 16)
2277		✗	return AVERROR_INVALIDDATA;
2278		✗	if (ret = process_frame_obj(ctx, &ctx->gb))
2279		✗	return ret;
2280		✗	have_img = 1;
2281
2282			/* STOR: for ANIMv0/1 store the whole FOBJ datablock, as it
2283			* needs to be replayed on FTCH, since none of the codecs
2284			* it uses work on the full buffer.
2285			* For ANIMv2, it's enough to store the current framebuffer.
2286			*/
2287		✗	if (to_store) {
2288		✗	to_store = 0;
2289		✗	if (ctx->subversion < 2) {
2290		✗	if (size + 4 <= ctx->stored_frame_size) {
2291		✗	int pos2 = bytestream2_tell(&ctx->gb);
2292		✗	bytestream2_seek(&ctx->gb, pos, SEEK_SET);
2293		✗	*(uint32_t *)(ctx->stored_frame) = size;
2294		✗	bytestream2_get_bufferu(&ctx->gb, ctx->stored_frame + 4, size);
2295		✗	bytestream2_seek(&ctx->gb, pos2, SEEK_SET);
2296			} else {
2297		✗	av_log(avctx, AV_LOG_ERROR, "FOBJ too large for STOR\n");
2298		✗	ret = AVERROR(ENOMEM);
2299			}
2300			} else {
2301		✗	memcpy(ctx->stored_frame, ctx->fbuf, ctx->buf_size);
2302			}
2303			}
2304		✗	break;
2305		✗	case MKBETAG('X', 'P', 'A', 'L'):
2306		✗	if (ret = process_xpal(ctx, size))
2307		✗	return ret;
2308		✗	break;
2309		✗	case MKBETAG('S', 'T', 'O', 'R'):
2310		✗	to_store = 1;
2311		✗	break;
2312		✗	case MKBETAG('F', 'T', 'C', 'H'):
2313		✗	if (ctx->subversion < 2) {
2314		✗	if (ret = process_ftch(ctx, size))
2315		✗	return ret;
2316			} else {
2317		✗	memcpy(ctx->fbuf, ctx->stored_frame, ctx->buf_size);
2318			}
2319		✗	have_img = 1;
2320		✗	break;
2321		✗	default:
2322		✗	bytestream2_skip(&ctx->gb, size);
2323		✗	av_log(avctx, AV_LOG_DEBUG,
2324			"Unknown/unsupported chunk %"PRIx32".\n", sig);
2325		✗	break;
2326			}
2327
2328			/* the sizes of chunks are usually a multiple of 2. However
2329			* there are a few unaligned FOBJs in RA1 L2PLAY.ANM only (looks
2330			* like a game bug) and IACT audio chunks which have odd sizes
2331			* but are padded with a zero byte.
2332			*/
2333		✗	bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
2334		✗	if ((pos + size) & 1) {
2335		✗	if (0 != bytestream2_get_byteu(&ctx->gb))
2336		✗	bytestream2_seek(&ctx->gb, pos + size, SEEK_SET);
2337			}
2338			}
2339
2340		✗	if (have_img) {
2341		✗	if ((ret = copy_output(ctx, NULL)))
2342		✗	return ret;
2343		✗	memcpy(ctx->frame->data[1], ctx->pal, 1024);
2344		✗	*got_frame_ptr = 1;
2345			}
2346			} else {
2347			SANMFrameHeader header;
2348
2349	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 16 times.	16	if ((ret = read_frame_header(ctx, &header)))
2350		1	return ret;
2351
2352		16	ctx->rotate_code = header.rotate_code;
2353	2/2 ✓ Branch 0 taken 1 times. ✓ Branch 1 taken 15 times.	16	if (!header.seq_num) {
2354		1	ctx->frame->flags |= AV_FRAME_FLAG_KEY;
2355		1	ctx->frame->pict_type = AV_PICTURE_TYPE_I;
2356		1	fill_frame(ctx->frm1, ctx->npixels, header.bg_color);
2357		1	fill_frame(ctx->frm2, ctx->npixels, header.bg_color);
2358			} else {
2359		15	ctx->frame->flags &= ~AV_FRAME_FLAG_KEY;
2360		15	ctx->frame->pict_type = AV_PICTURE_TYPE_P;
2361			}
2362
2363	1/2 ✓ Branch 0 taken 16 times. ✗ Branch 1 not taken.	16	if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) {
2364	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 15 times.	16	if ((ret = v1_decoders[header.codec](ctx))) {
2365		1	av_log(avctx, AV_LOG_ERROR,
2366			"Subcodec %d: error decoding frame.\n", header.codec);
2367		1	return ret;
2368			}
2369			} else {
2370		✗	avpriv_request_sample(avctx, "Subcodec %d", header.codec);
2371		✗	return AVERROR_PATCHWELCOME;
2372			}
2373
2374	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 15 times.	15	if ((ret = copy_output(ctx, &header)))
2375		✗	return ret;
2376
2377		15	*got_frame_ptr = 1;
2378
2379			}
2380	2/2 ✓ Branch 0 taken 9 times. ✓ Branch 1 taken 6 times.	15	if (ctx->rotate_code)
2381		9	rotate_bufs(ctx, ctx->rotate_code);
2382
2383		15	return pkt->size;
2384			}
2385
2386			const FFCodec ff_sanm_decoder = {
2387			.p.name = "sanm",
2388			CODEC_LONG_NAME("LucasArts SANM/Smush video"),
2389			.p.type = AVMEDIA_TYPE_VIDEO,
2390			.p.id = AV_CODEC_ID_SANM,
2391			.priv_data_size = sizeof(SANMVideoContext),
2392			.init = decode_init,
2393			.close = decode_end,
2394			FF_CODEC_DECODE_CB(decode_frame),
2395			.p.capabilities = AV_CODEC_CAP_DR1,
2396			};
2397