1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Copyright (C) Collabora, Ltd. |
4 | * |
5 | * Based on GSPCA and CODA drivers: |
6 | * Copyright (C) Jean-Francois Moine (http://moinejf.free.fr) |
7 | * Copyright (C) 2014 Philipp Zabel, Pengutronix |
8 | */ |
9 | |
10 | #include <linux/align.h> |
11 | #include <linux/build_bug.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/string.h> |
14 | #include "hantro_jpeg.h" |
15 | #include "hantro.h" |
16 | |
17 | #define LUMA_QUANT_OFF 25 |
18 | #define CHROMA_QUANT_OFF 90 |
19 | #define HEIGHT_OFF 159 |
20 | #define WIDTH_OFF 161 |
21 | |
22 | #define HUFF_LUMA_DC_OFF 178 |
23 | #define HUFF_LUMA_AC_OFF 211 |
24 | #define HUFF_CHROMA_DC_OFF 394 |
25 | #define HUFF_CHROMA_AC_OFF 427 |
26 | |
27 | /* Default tables from JPEG ITU-T.81 |
28 | * (ISO/IEC 10918-1) Annex K, tables K.1 and K.2 |
29 | */ |
30 | static const unsigned char luma_q_table[] = { |
31 | 0x10, 0x0b, 0x0a, 0x10, 0x18, 0x28, 0x33, 0x3d, |
32 | 0x0c, 0x0c, 0x0e, 0x13, 0x1a, 0x3a, 0x3c, 0x37, |
33 | 0x0e, 0x0d, 0x10, 0x18, 0x28, 0x39, 0x45, 0x38, |
34 | 0x0e, 0x11, 0x16, 0x1d, 0x33, 0x57, 0x50, 0x3e, |
35 | 0x12, 0x16, 0x25, 0x38, 0x44, 0x6d, 0x67, 0x4d, |
36 | 0x18, 0x23, 0x37, 0x40, 0x51, 0x68, 0x71, 0x5c, |
37 | 0x31, 0x40, 0x4e, 0x57, 0x67, 0x79, 0x78, 0x65, |
38 | 0x48, 0x5c, 0x5f, 0x62, 0x70, 0x64, 0x67, 0x63 |
39 | }; |
40 | |
41 | static const unsigned char chroma_q_table[] = { |
42 | 0x11, 0x12, 0x18, 0x2f, 0x63, 0x63, 0x63, 0x63, |
43 | 0x12, 0x15, 0x1a, 0x42, 0x63, 0x63, 0x63, 0x63, |
44 | 0x18, 0x1a, 0x38, 0x63, 0x63, 0x63, 0x63, 0x63, |
45 | 0x2f, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
46 | 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
47 | 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
48 | 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, |
49 | 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63 |
50 | }; |
51 | |
52 | static const unsigned char zigzag[] = { |
53 | 0, 1, 8, 16, 9, 2, 3, 10, |
54 | 17, 24, 32, 25, 18, 11, 4, 5, |
55 | 12, 19, 26, 33, 40, 48, 41, 34, |
56 | 27, 20, 13, 6, 7, 14, 21, 28, |
57 | 35, 42, 49, 56, 57, 50, 43, 36, |
58 | 29, 22, 15, 23, 30, 37, 44, 51, |
59 | 58, 59, 52, 45, 38, 31, 39, 46, |
60 | 53, 60, 61, 54, 47, 55, 62, 63 |
61 | }; |
62 | |
63 | static const u32 hw_reorder[] = { |
64 | 0, 8, 16, 24, 1, 9, 17, 25, |
65 | 32, 40, 48, 56, 33, 41, 49, 57, |
66 | 2, 10, 18, 26, 3, 11, 19, 27, |
67 | 34, 42, 50, 58, 35, 43, 51, 59, |
68 | 4, 12, 20, 28, 5, 13, 21, 29, |
69 | 36, 44, 52, 60, 37, 45, 53, 61, |
70 | 6, 14, 22, 30, 7, 15, 23, 31, |
71 | 38, 46, 54, 62, 39, 47, 55, 63 |
72 | }; |
73 | |
74 | /* Huffman tables are shared with CODA */ |
75 | static const unsigned char luma_dc_table[] = { |
76 | 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, |
77 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
78 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
79 | 0x08, 0x09, 0x0a, 0x0b, |
80 | }; |
81 | |
82 | static const unsigned char chroma_dc_table[] = { |
83 | 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, |
84 | 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, |
85 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
86 | 0x08, 0x09, 0x0a, 0x0b, |
87 | }; |
88 | |
89 | static const unsigned char luma_ac_table[] = { |
90 | 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, |
91 | 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d, |
92 | 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, |
93 | 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, |
94 | 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, |
95 | 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, |
96 | 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, |
97 | 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, |
98 | 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
99 | 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, |
100 | 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
101 | 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
102 | 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
103 | 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, |
104 | 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, |
105 | 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, |
106 | 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, |
107 | 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, |
108 | 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, |
109 | 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, |
110 | 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, |
111 | 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
112 | 0xf9, 0xfa, |
113 | }; |
114 | |
115 | static const unsigned char chroma_ac_table[] = { |
116 | 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, |
117 | 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, |
118 | 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, |
119 | 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, |
120 | 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, |
121 | 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, |
122 | 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, |
123 | 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, |
124 | 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, |
125 | 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, |
126 | 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
127 | 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, |
128 | 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, |
129 | 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, |
130 | 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, |
131 | 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, |
132 | 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, |
133 | 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, |
134 | 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, |
135 | 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, |
136 | 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, |
137 | 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
138 | 0xf9, 0xfa, |
139 | }; |
140 | |
141 | /* For simplicity, we keep a pre-formatted JPEG header, |
142 | * and we'll use fixed offsets to change the width, height |
143 | * quantization tables, etc. |
144 | */ |
145 | static const unsigned char [] = { |
146 | /* SOI */ |
147 | 0xff, 0xd8, |
148 | |
149 | /* JFIF-APP0 */ |
150 | 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46, 0x49, 0x46, |
151 | 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x01, |
152 | 0x00, 0x00, |
153 | |
154 | /* DQT */ |
155 | 0xff, 0xdb, 0x00, 0x84, |
156 | |
157 | 0x00, |
158 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
159 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
160 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
161 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
162 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
163 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
164 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
165 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
166 | |
167 | 0x01, |
168 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
169 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
170 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
171 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
172 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
173 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
174 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
175 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
176 | |
177 | /* SOF */ |
178 | 0xff, 0xc0, 0x00, 0x11, 0x08, 0x00, 0xf0, 0x01, |
179 | 0x40, 0x03, 0x01, 0x22, 0x00, 0x02, 0x11, 0x01, |
180 | 0x03, 0x11, 0x01, |
181 | |
182 | /* DHT */ |
183 | 0xff, 0xc4, 0x00, 0x1f, 0x00, |
184 | |
185 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
186 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
187 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
188 | 0x00, 0x00, 0x00, 0x00, |
189 | |
190 | /* DHT */ |
191 | 0xff, 0xc4, 0x00, 0xb5, 0x10, |
192 | |
193 | 0x00, 0x00, |
194 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
195 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
196 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
197 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
198 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
199 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
200 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
201 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
202 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
203 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
204 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
205 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
206 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
207 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
208 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
209 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
210 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
211 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
212 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
213 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
214 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
215 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
216 | |
217 | /* DHT */ |
218 | 0xff, 0xc4, 0x00, 0x1f, 0x01, |
219 | |
220 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
221 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
222 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
223 | 0x00, 0x00, 0x00, 0x00, |
224 | |
225 | /* DHT */ |
226 | 0xff, 0xc4, 0x00, 0xb5, 0x11, |
227 | |
228 | 0x00, 0x00, |
229 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
230 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
231 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
232 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
233 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
234 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
235 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
236 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
237 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
238 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
239 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
240 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
241 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
242 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
243 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
244 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
245 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
246 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
247 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
248 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
249 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
250 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
251 | |
252 | /* COM */ |
253 | 0xff, 0xfe, 0x00, 0x03, 0x00, |
254 | |
255 | /* SOS */ |
256 | 0xff, 0xda, 0x00, 0x0c, 0x03, 0x01, 0x00, 0x02, |
257 | 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00, |
258 | }; |
259 | |
260 | /* |
261 | * JPEG_HEADER_SIZE is used in other parts of the driver in lieu of |
262 | * "sizeof(hantro_jpeg_header)". The two must be equal. |
263 | */ |
264 | static_assert(sizeof(hantro_jpeg_header) == JPEG_HEADER_SIZE); |
265 | |
266 | /* |
267 | * hantro_jpeg_header is padded with a COM segment, so that the payload |
268 | * of the SOS segment (the entropy-encoded image scan), which should |
269 | * trail the whole header, is 8-byte aligned for the hardware to write |
270 | * to directly. |
271 | */ |
272 | static_assert(IS_ALIGNED(sizeof(hantro_jpeg_header), 8), |
273 | "Hantro JPEG header size needs to be 8-byte aligned." ); |
274 | |
275 | static unsigned char jpeg_scale_qp(const unsigned char qp, int scale) |
276 | { |
277 | unsigned int temp; |
278 | |
279 | temp = DIV_ROUND_CLOSEST((unsigned int)qp * scale, 100); |
280 | if (temp <= 0) |
281 | temp = 1; |
282 | if (temp > 255) |
283 | temp = 255; |
284 | |
285 | return (unsigned char)temp; |
286 | } |
287 | |
288 | static void |
289 | jpeg_scale_quant_table(unsigned char *file_q_tab, |
290 | unsigned char *reordered_q_tab, |
291 | const unsigned char *tab, int scale) |
292 | { |
293 | int i; |
294 | |
295 | BUILD_BUG_ON(ARRAY_SIZE(zigzag) != JPEG_QUANT_SIZE); |
296 | BUILD_BUG_ON(ARRAY_SIZE(hw_reorder) != JPEG_QUANT_SIZE); |
297 | |
298 | for (i = 0; i < JPEG_QUANT_SIZE; i++) { |
299 | file_q_tab[i] = jpeg_scale_qp(qp: tab[zigzag[i]], scale); |
300 | reordered_q_tab[i] = jpeg_scale_qp(qp: tab[hw_reorder[i]], scale); |
301 | } |
302 | } |
303 | |
304 | static void jpeg_set_quality(struct hantro_jpeg_ctx *ctx) |
305 | { |
306 | int scale; |
307 | |
308 | /* |
309 | * Non-linear scaling factor: |
310 | * [5,50] -> [1000..100], [51,100] -> [98..0] |
311 | */ |
312 | if (ctx->quality < 50) |
313 | scale = 5000 / ctx->quality; |
314 | else |
315 | scale = 200 - 2 * ctx->quality; |
316 | |
317 | BUILD_BUG_ON(ARRAY_SIZE(luma_q_table) != JPEG_QUANT_SIZE); |
318 | BUILD_BUG_ON(ARRAY_SIZE(chroma_q_table) != JPEG_QUANT_SIZE); |
319 | BUILD_BUG_ON(ARRAY_SIZE(ctx->hw_luma_qtable) != JPEG_QUANT_SIZE); |
320 | BUILD_BUG_ON(ARRAY_SIZE(ctx->hw_chroma_qtable) != JPEG_QUANT_SIZE); |
321 | |
322 | jpeg_scale_quant_table(file_q_tab: ctx->buffer + LUMA_QUANT_OFF, |
323 | reordered_q_tab: ctx->hw_luma_qtable, tab: luma_q_table, scale); |
324 | jpeg_scale_quant_table(file_q_tab: ctx->buffer + CHROMA_QUANT_OFF, |
325 | reordered_q_tab: ctx->hw_chroma_qtable, tab: chroma_q_table, scale); |
326 | } |
327 | |
328 | void (struct hantro_jpeg_ctx *ctx) |
329 | { |
330 | char *buf = ctx->buffer; |
331 | |
332 | memcpy(buf, hantro_jpeg_header, |
333 | sizeof(hantro_jpeg_header)); |
334 | |
335 | buf[HEIGHT_OFF + 0] = ctx->height >> 8; |
336 | buf[HEIGHT_OFF + 1] = ctx->height; |
337 | buf[WIDTH_OFF + 0] = ctx->width >> 8; |
338 | buf[WIDTH_OFF + 1] = ctx->width; |
339 | |
340 | memcpy(buf + HUFF_LUMA_DC_OFF, luma_dc_table, sizeof(luma_dc_table)); |
341 | memcpy(buf + HUFF_LUMA_AC_OFF, luma_ac_table, sizeof(luma_ac_table)); |
342 | memcpy(buf + HUFF_CHROMA_DC_OFF, chroma_dc_table, |
343 | sizeof(chroma_dc_table)); |
344 | memcpy(buf + HUFF_CHROMA_AC_OFF, chroma_ac_table, |
345 | sizeof(chroma_ac_table)); |
346 | |
347 | jpeg_set_quality(ctx); |
348 | } |
349 | |