diff options
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c | 1364 |
1 files changed, 682 insertions, 682 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c index 3b91e95..606c19a 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jcmarker.c | |||
@@ -1,682 +1,682 @@ | |||
1 | /* | 1 | /* |
2 | * jcmarker.c | 2 | * jcmarker.c |
3 | * | 3 | * |
4 | * Copyright (C) 1991-1998, Thomas G. Lane. | 4 | * Copyright (C) 1991-1998, Thomas G. Lane. |
5 | * Modified 2003-2010 by Guido Vollbeding. | 5 | * Modified 2003-2010 by Guido Vollbeding. |
6 | * This file is part of the Independent JPEG Group's software. | 6 | * This file is part of the Independent JPEG Group's software. |
7 | * For conditions of distribution and use, see the accompanying README file. | 7 | * For conditions of distribution and use, see the accompanying README file. |
8 | * | 8 | * |
9 | * This file contains routines to write JPEG datastream markers. | 9 | * This file contains routines to write JPEG datastream markers. |
10 | */ | 10 | */ |
11 | 11 | ||
12 | #define JPEG_INTERNALS | 12 | #define JPEG_INTERNALS |
13 | #include "jinclude.h" | 13 | #include "jinclude.h" |
14 | #include "jpeglib.h" | 14 | #include "jpeglib.h" |
15 | 15 | ||
16 | 16 | ||
17 | typedef enum { /* JPEG marker codes */ | 17 | typedef enum { /* JPEG marker codes */ |
18 | M_SOF0 = 0xc0, | 18 | M_SOF0 = 0xc0, |
19 | M_SOF1 = 0xc1, | 19 | M_SOF1 = 0xc1, |
20 | M_SOF2 = 0xc2, | 20 | M_SOF2 = 0xc2, |
21 | M_SOF3 = 0xc3, | 21 | M_SOF3 = 0xc3, |
22 | 22 | ||
23 | M_SOF5 = 0xc5, | 23 | M_SOF5 = 0xc5, |
24 | M_SOF6 = 0xc6, | 24 | M_SOF6 = 0xc6, |
25 | M_SOF7 = 0xc7, | 25 | M_SOF7 = 0xc7, |
26 | 26 | ||
27 | M_JPG = 0xc8, | 27 | M_JPG = 0xc8, |
28 | M_SOF9 = 0xc9, | 28 | M_SOF9 = 0xc9, |
29 | M_SOF10 = 0xca, | 29 | M_SOF10 = 0xca, |
30 | M_SOF11 = 0xcb, | 30 | M_SOF11 = 0xcb, |
31 | 31 | ||
32 | M_SOF13 = 0xcd, | 32 | M_SOF13 = 0xcd, |
33 | M_SOF14 = 0xce, | 33 | M_SOF14 = 0xce, |
34 | M_SOF15 = 0xcf, | 34 | M_SOF15 = 0xcf, |
35 | 35 | ||
36 | M_DHT = 0xc4, | 36 | M_DHT = 0xc4, |
37 | 37 | ||
38 | M_DAC = 0xcc, | 38 | M_DAC = 0xcc, |
39 | 39 | ||
40 | M_RST0 = 0xd0, | 40 | M_RST0 = 0xd0, |
41 | M_RST1 = 0xd1, | 41 | M_RST1 = 0xd1, |
42 | M_RST2 = 0xd2, | 42 | M_RST2 = 0xd2, |
43 | M_RST3 = 0xd3, | 43 | M_RST3 = 0xd3, |
44 | M_RST4 = 0xd4, | 44 | M_RST4 = 0xd4, |
45 | M_RST5 = 0xd5, | 45 | M_RST5 = 0xd5, |
46 | M_RST6 = 0xd6, | 46 | M_RST6 = 0xd6, |
47 | M_RST7 = 0xd7, | 47 | M_RST7 = 0xd7, |
48 | 48 | ||
49 | M_SOI = 0xd8, | 49 | M_SOI = 0xd8, |
50 | M_EOI = 0xd9, | 50 | M_EOI = 0xd9, |
51 | M_SOS = 0xda, | 51 | M_SOS = 0xda, |
52 | M_DQT = 0xdb, | 52 | M_DQT = 0xdb, |
53 | M_DNL = 0xdc, | 53 | M_DNL = 0xdc, |
54 | M_DRI = 0xdd, | 54 | M_DRI = 0xdd, |
55 | M_DHP = 0xde, | 55 | M_DHP = 0xde, |
56 | M_EXP = 0xdf, | 56 | M_EXP = 0xdf, |
57 | 57 | ||
58 | M_APP0 = 0xe0, | 58 | M_APP0 = 0xe0, |
59 | M_APP1 = 0xe1, | 59 | M_APP1 = 0xe1, |
60 | M_APP2 = 0xe2, | 60 | M_APP2 = 0xe2, |
61 | M_APP3 = 0xe3, | 61 | M_APP3 = 0xe3, |
62 | M_APP4 = 0xe4, | 62 | M_APP4 = 0xe4, |
63 | M_APP5 = 0xe5, | 63 | M_APP5 = 0xe5, |
64 | M_APP6 = 0xe6, | 64 | M_APP6 = 0xe6, |
65 | M_APP7 = 0xe7, | 65 | M_APP7 = 0xe7, |
66 | M_APP8 = 0xe8, | 66 | M_APP8 = 0xe8, |
67 | M_APP9 = 0xe9, | 67 | M_APP9 = 0xe9, |
68 | M_APP10 = 0xea, | 68 | M_APP10 = 0xea, |
69 | M_APP11 = 0xeb, | 69 | M_APP11 = 0xeb, |
70 | M_APP12 = 0xec, | 70 | M_APP12 = 0xec, |
71 | M_APP13 = 0xed, | 71 | M_APP13 = 0xed, |
72 | M_APP14 = 0xee, | 72 | M_APP14 = 0xee, |
73 | M_APP15 = 0xef, | 73 | M_APP15 = 0xef, |
74 | 74 | ||
75 | M_JPG0 = 0xf0, | 75 | M_JPG0 = 0xf0, |
76 | M_JPG13 = 0xfd, | 76 | M_JPG13 = 0xfd, |
77 | M_COM = 0xfe, | 77 | M_COM = 0xfe, |
78 | 78 | ||
79 | M_TEM = 0x01, | 79 | M_TEM = 0x01, |
80 | 80 | ||
81 | M_ERROR = 0x100 | 81 | M_ERROR = 0x100 |
82 | } JPEG_MARKER; | 82 | } JPEG_MARKER; |
83 | 83 | ||
84 | 84 | ||
85 | /* Private state */ | 85 | /* Private state */ |
86 | 86 | ||
87 | typedef struct { | 87 | typedef struct { |
88 | struct jpeg_marker_writer pub; /* public fields */ | 88 | struct jpeg_marker_writer pub; /* public fields */ |
89 | 89 | ||
90 | unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */ | 90 | unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */ |
91 | } my_marker_writer; | 91 | } my_marker_writer; |
92 | 92 | ||
93 | typedef my_marker_writer * my_marker_ptr; | 93 | typedef my_marker_writer * my_marker_ptr; |
94 | 94 | ||
95 | 95 | ||
96 | /* | 96 | /* |
97 | * Basic output routines. | 97 | * Basic output routines. |
98 | * | 98 | * |
99 | * Note that we do not support suspension while writing a marker. | 99 | * Note that we do not support suspension while writing a marker. |
100 | * Therefore, an application using suspension must ensure that there is | 100 | * Therefore, an application using suspension must ensure that there is |
101 | * enough buffer space for the initial markers (typ. 600-700 bytes) before | 101 | * enough buffer space for the initial markers (typ. 600-700 bytes) before |
102 | * calling jpeg_start_compress, and enough space to write the trailing EOI | 102 | * calling jpeg_start_compress, and enough space to write the trailing EOI |
103 | * (a few bytes) before calling jpeg_finish_compress. Multipass compression | 103 | * (a few bytes) before calling jpeg_finish_compress. Multipass compression |
104 | * modes are not supported at all with suspension, so those two are the only | 104 | * modes are not supported at all with suspension, so those two are the only |
105 | * points where markers will be written. | 105 | * points where markers will be written. |
106 | */ | 106 | */ |
107 | 107 | ||
108 | LOCAL(void) | 108 | LOCAL(void) |
109 | emit_byte (j_compress_ptr cinfo, int val) | 109 | emit_byte (j_compress_ptr cinfo, int val) |
110 | /* Emit a byte */ | 110 | /* Emit a byte */ |
111 | { | 111 | { |
112 | struct jpeg_destination_mgr * dest = cinfo->dest; | 112 | struct jpeg_destination_mgr * dest = cinfo->dest; |
113 | 113 | ||
114 | *(dest->next_output_byte)++ = (JOCTET) val; | 114 | *(dest->next_output_byte)++ = (JOCTET) val; |
115 | if (--dest->free_in_buffer == 0) { | 115 | if (--dest->free_in_buffer == 0) { |
116 | if (! (*dest->empty_output_buffer) (cinfo)) | 116 | if (! (*dest->empty_output_buffer) (cinfo)) |
117 | ERREXIT(cinfo, JERR_CANT_SUSPEND); | 117 | ERREXIT(cinfo, JERR_CANT_SUSPEND); |
118 | } | 118 | } |
119 | } | 119 | } |
120 | 120 | ||
121 | 121 | ||
122 | LOCAL(void) | 122 | LOCAL(void) |
123 | emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark) | 123 | emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark) |
124 | /* Emit a marker code */ | 124 | /* Emit a marker code */ |
125 | { | 125 | { |
126 | emit_byte(cinfo, 0xFF); | 126 | emit_byte(cinfo, 0xFF); |
127 | emit_byte(cinfo, (int) mark); | 127 | emit_byte(cinfo, (int) mark); |
128 | } | 128 | } |
129 | 129 | ||
130 | 130 | ||
131 | LOCAL(void) | 131 | LOCAL(void) |
132 | emit_2bytes (j_compress_ptr cinfo, int value) | 132 | emit_2bytes (j_compress_ptr cinfo, int value) |
133 | /* Emit a 2-byte integer; these are always MSB first in JPEG files */ | 133 | /* Emit a 2-byte integer; these are always MSB first in JPEG files */ |
134 | { | 134 | { |
135 | emit_byte(cinfo, (value >> 8) & 0xFF); | 135 | emit_byte(cinfo, (value >> 8) & 0xFF); |
136 | emit_byte(cinfo, value & 0xFF); | 136 | emit_byte(cinfo, value & 0xFF); |
137 | } | 137 | } |
138 | 138 | ||
139 | 139 | ||
140 | /* | 140 | /* |
141 | * Routines to write specific marker types. | 141 | * Routines to write specific marker types. |
142 | */ | 142 | */ |
143 | 143 | ||
144 | LOCAL(int) | 144 | LOCAL(int) |
145 | emit_dqt (j_compress_ptr cinfo, int index) | 145 | emit_dqt (j_compress_ptr cinfo, int index) |
146 | /* Emit a DQT marker */ | 146 | /* Emit a DQT marker */ |
147 | /* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */ | 147 | /* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */ |
148 | { | 148 | { |
149 | JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index]; | 149 | JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index]; |
150 | int prec; | 150 | int prec; |
151 | int i; | 151 | int i; |
152 | 152 | ||
153 | if (qtbl == NULL) | 153 | if (qtbl == NULL) |
154 | ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index); | 154 | ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index); |
155 | 155 | ||
156 | prec = 0; | 156 | prec = 0; |
157 | for (i = 0; i <= cinfo->lim_Se; i++) { | 157 | for (i = 0; i <= cinfo->lim_Se; i++) { |
158 | if (qtbl->quantval[cinfo->natural_order[i]] > 255) | 158 | if (qtbl->quantval[cinfo->natural_order[i]] > 255) |
159 | prec = 1; | 159 | prec = 1; |
160 | } | 160 | } |
161 | 161 | ||
162 | if (! qtbl->sent_table) { | 162 | if (! qtbl->sent_table) { |
163 | emit_marker(cinfo, M_DQT); | 163 | emit_marker(cinfo, M_DQT); |
164 | 164 | ||
165 | emit_2bytes(cinfo, | 165 | emit_2bytes(cinfo, |
166 | prec ? cinfo->lim_Se * 2 + 2 + 1 + 2 : cinfo->lim_Se + 1 + 1 + 2); | 166 | prec ? cinfo->lim_Se * 2 + 2 + 1 + 2 : cinfo->lim_Se + 1 + 1 + 2); |
167 | 167 | ||
168 | emit_byte(cinfo, index + (prec<<4)); | 168 | emit_byte(cinfo, index + (prec<<4)); |
169 | 169 | ||
170 | for (i = 0; i <= cinfo->lim_Se; i++) { | 170 | for (i = 0; i <= cinfo->lim_Se; i++) { |
171 | /* The table entries must be emitted in zigzag order. */ | 171 | /* The table entries must be emitted in zigzag order. */ |
172 | unsigned int qval = qtbl->quantval[cinfo->natural_order[i]]; | 172 | unsigned int qval = qtbl->quantval[cinfo->natural_order[i]]; |
173 | if (prec) | 173 | if (prec) |
174 | emit_byte(cinfo, (int) (qval >> 8)); | 174 | emit_byte(cinfo, (int) (qval >> 8)); |
175 | emit_byte(cinfo, (int) (qval & 0xFF)); | 175 | emit_byte(cinfo, (int) (qval & 0xFF)); |
176 | } | 176 | } |
177 | 177 | ||
178 | qtbl->sent_table = TRUE; | 178 | qtbl->sent_table = TRUE; |
179 | } | 179 | } |
180 | 180 | ||
181 | return prec; | 181 | return prec; |
182 | } | 182 | } |
183 | 183 | ||
184 | 184 | ||
185 | LOCAL(void) | 185 | LOCAL(void) |
186 | emit_dht (j_compress_ptr cinfo, int index, boolean is_ac) | 186 | emit_dht (j_compress_ptr cinfo, int index, boolean is_ac) |
187 | /* Emit a DHT marker */ | 187 | /* Emit a DHT marker */ |
188 | { | 188 | { |
189 | JHUFF_TBL * htbl; | 189 | JHUFF_TBL * htbl; |
190 | int length, i; | 190 | int length, i; |
191 | 191 | ||
192 | if (is_ac) { | 192 | if (is_ac) { |
193 | htbl = cinfo->ac_huff_tbl_ptrs[index]; | 193 | htbl = cinfo->ac_huff_tbl_ptrs[index]; |
194 | index += 0x10; /* output index has AC bit set */ | 194 | index += 0x10; /* output index has AC bit set */ |
195 | } else { | 195 | } else { |
196 | htbl = cinfo->dc_huff_tbl_ptrs[index]; | 196 | htbl = cinfo->dc_huff_tbl_ptrs[index]; |
197 | } | 197 | } |
198 | 198 | ||
199 | if (htbl == NULL) | 199 | if (htbl == NULL) |
200 | ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index); | 200 | ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index); |
201 | 201 | ||
202 | if (! htbl->sent_table) { | 202 | if (! htbl->sent_table) { |
203 | emit_marker(cinfo, M_DHT); | 203 | emit_marker(cinfo, M_DHT); |
204 | 204 | ||
205 | length = 0; | 205 | length = 0; |
206 | for (i = 1; i <= 16; i++) | 206 | for (i = 1; i <= 16; i++) |
207 | length += htbl->bits[i]; | 207 | length += htbl->bits[i]; |
208 | 208 | ||
209 | emit_2bytes(cinfo, length + 2 + 1 + 16); | 209 | emit_2bytes(cinfo, length + 2 + 1 + 16); |
210 | emit_byte(cinfo, index); | 210 | emit_byte(cinfo, index); |
211 | 211 | ||
212 | for (i = 1; i <= 16; i++) | 212 | for (i = 1; i <= 16; i++) |
213 | emit_byte(cinfo, htbl->bits[i]); | 213 | emit_byte(cinfo, htbl->bits[i]); |
214 | 214 | ||
215 | for (i = 0; i < length; i++) | 215 | for (i = 0; i < length; i++) |
216 | emit_byte(cinfo, htbl->huffval[i]); | 216 | emit_byte(cinfo, htbl->huffval[i]); |
217 | 217 | ||
218 | htbl->sent_table = TRUE; | 218 | htbl->sent_table = TRUE; |
219 | } | 219 | } |
220 | } | 220 | } |
221 | 221 | ||
222 | 222 | ||
223 | LOCAL(void) | 223 | LOCAL(void) |
224 | emit_dac (j_compress_ptr cinfo) | 224 | emit_dac (j_compress_ptr cinfo) |
225 | /* Emit a DAC marker */ | 225 | /* Emit a DAC marker */ |
226 | /* Since the useful info is so small, we want to emit all the tables in */ | 226 | /* Since the useful info is so small, we want to emit all the tables in */ |
227 | /* one DAC marker. Therefore this routine does its own scan of the table. */ | 227 | /* one DAC marker. Therefore this routine does its own scan of the table. */ |
228 | { | 228 | { |
229 | #ifdef C_ARITH_CODING_SUPPORTED | 229 | #ifdef C_ARITH_CODING_SUPPORTED |
230 | char dc_in_use[NUM_ARITH_TBLS]; | 230 | char dc_in_use[NUM_ARITH_TBLS]; |
231 | char ac_in_use[NUM_ARITH_TBLS]; | 231 | char ac_in_use[NUM_ARITH_TBLS]; |
232 | int length, i; | 232 | int length, i; |
233 | jpeg_component_info *compptr; | 233 | jpeg_component_info *compptr; |
234 | 234 | ||
235 | for (i = 0; i < NUM_ARITH_TBLS; i++) | 235 | for (i = 0; i < NUM_ARITH_TBLS; i++) |
236 | dc_in_use[i] = ac_in_use[i] = 0; | 236 | dc_in_use[i] = ac_in_use[i] = 0; |
237 | 237 | ||
238 | for (i = 0; i < cinfo->comps_in_scan; i++) { | 238 | for (i = 0; i < cinfo->comps_in_scan; i++) { |
239 | compptr = cinfo->cur_comp_info[i]; | 239 | compptr = cinfo->cur_comp_info[i]; |
240 | /* DC needs no table for refinement scan */ | 240 | /* DC needs no table for refinement scan */ |
241 | if (cinfo->Ss == 0 && cinfo->Ah == 0) | 241 | if (cinfo->Ss == 0 && cinfo->Ah == 0) |
242 | dc_in_use[compptr->dc_tbl_no] = 1; | 242 | dc_in_use[compptr->dc_tbl_no] = 1; |
243 | /* AC needs no table when not present */ | 243 | /* AC needs no table when not present */ |
244 | if (cinfo->Se) | 244 | if (cinfo->Se) |
245 | ac_in_use[compptr->ac_tbl_no] = 1; | 245 | ac_in_use[compptr->ac_tbl_no] = 1; |
246 | } | 246 | } |
247 | 247 | ||
248 | length = 0; | 248 | length = 0; |
249 | for (i = 0; i < NUM_ARITH_TBLS; i++) | 249 | for (i = 0; i < NUM_ARITH_TBLS; i++) |
250 | length += dc_in_use[i] + ac_in_use[i]; | 250 | length += dc_in_use[i] + ac_in_use[i]; |
251 | 251 | ||
252 | if (length) { | 252 | if (length) { |
253 | emit_marker(cinfo, M_DAC); | 253 | emit_marker(cinfo, M_DAC); |
254 | 254 | ||
255 | emit_2bytes(cinfo, length*2 + 2); | 255 | emit_2bytes(cinfo, length*2 + 2); |
256 | 256 | ||
257 | for (i = 0; i < NUM_ARITH_TBLS; i++) { | 257 | for (i = 0; i < NUM_ARITH_TBLS; i++) { |
258 | if (dc_in_use[i]) { | 258 | if (dc_in_use[i]) { |
259 | emit_byte(cinfo, i); | 259 | emit_byte(cinfo, i); |
260 | emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4)); | 260 | emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4)); |
261 | } | 261 | } |
262 | if (ac_in_use[i]) { | 262 | if (ac_in_use[i]) { |
263 | emit_byte(cinfo, i + 0x10); | 263 | emit_byte(cinfo, i + 0x10); |
264 | emit_byte(cinfo, cinfo->arith_ac_K[i]); | 264 | emit_byte(cinfo, cinfo->arith_ac_K[i]); |
265 | } | 265 | } |
266 | } | 266 | } |
267 | } | 267 | } |
268 | #endif /* C_ARITH_CODING_SUPPORTED */ | 268 | #endif /* C_ARITH_CODING_SUPPORTED */ |
269 | } | 269 | } |
270 | 270 | ||
271 | 271 | ||
272 | LOCAL(void) | 272 | LOCAL(void) |
273 | emit_dri (j_compress_ptr cinfo) | 273 | emit_dri (j_compress_ptr cinfo) |
274 | /* Emit a DRI marker */ | 274 | /* Emit a DRI marker */ |
275 | { | 275 | { |
276 | emit_marker(cinfo, M_DRI); | 276 | emit_marker(cinfo, M_DRI); |
277 | 277 | ||
278 | emit_2bytes(cinfo, 4); /* fixed length */ | 278 | emit_2bytes(cinfo, 4); /* fixed length */ |
279 | 279 | ||
280 | emit_2bytes(cinfo, (int) cinfo->restart_interval); | 280 | emit_2bytes(cinfo, (int) cinfo->restart_interval); |
281 | } | 281 | } |
282 | 282 | ||
283 | 283 | ||
284 | LOCAL(void) | 284 | LOCAL(void) |
285 | emit_sof (j_compress_ptr cinfo, JPEG_MARKER code) | 285 | emit_sof (j_compress_ptr cinfo, JPEG_MARKER code) |
286 | /* Emit a SOF marker */ | 286 | /* Emit a SOF marker */ |
287 | { | 287 | { |
288 | int ci; | 288 | int ci; |
289 | jpeg_component_info *compptr; | 289 | jpeg_component_info *compptr; |
290 | 290 | ||
291 | emit_marker(cinfo, code); | 291 | emit_marker(cinfo, code); |
292 | 292 | ||
293 | emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */ | 293 | emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */ |
294 | 294 | ||
295 | /* Make sure image isn't bigger than SOF field can handle */ | 295 | /* Make sure image isn't bigger than SOF field can handle */ |
296 | if ((long) cinfo->jpeg_height > 65535L || | 296 | if ((long) cinfo->jpeg_height > 65535L || |
297 | (long) cinfo->jpeg_width > 65535L) | 297 | (long) cinfo->jpeg_width > 65535L) |
298 | ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535); | 298 | ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535); |
299 | 299 | ||
300 | emit_byte(cinfo, cinfo->data_precision); | 300 | emit_byte(cinfo, cinfo->data_precision); |
301 | emit_2bytes(cinfo, (int) cinfo->jpeg_height); | 301 | emit_2bytes(cinfo, (int) cinfo->jpeg_height); |
302 | emit_2bytes(cinfo, (int) cinfo->jpeg_width); | 302 | emit_2bytes(cinfo, (int) cinfo->jpeg_width); |
303 | 303 | ||
304 | emit_byte(cinfo, cinfo->num_components); | 304 | emit_byte(cinfo, cinfo->num_components); |
305 | 305 | ||
306 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | 306 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
307 | ci++, compptr++) { | 307 | ci++, compptr++) { |
308 | emit_byte(cinfo, compptr->component_id); | 308 | emit_byte(cinfo, compptr->component_id); |
309 | emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor); | 309 | emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor); |
310 | emit_byte(cinfo, compptr->quant_tbl_no); | 310 | emit_byte(cinfo, compptr->quant_tbl_no); |
311 | } | 311 | } |
312 | } | 312 | } |
313 | 313 | ||
314 | 314 | ||
315 | LOCAL(void) | 315 | LOCAL(void) |
316 | emit_sos (j_compress_ptr cinfo) | 316 | emit_sos (j_compress_ptr cinfo) |
317 | /* Emit a SOS marker */ | 317 | /* Emit a SOS marker */ |
318 | { | 318 | { |
319 | int i, td, ta; | 319 | int i, td, ta; |
320 | jpeg_component_info *compptr; | 320 | jpeg_component_info *compptr; |
321 | 321 | ||
322 | emit_marker(cinfo, M_SOS); | 322 | emit_marker(cinfo, M_SOS); |
323 | 323 | ||
324 | emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */ | 324 | emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */ |
325 | 325 | ||
326 | emit_byte(cinfo, cinfo->comps_in_scan); | 326 | emit_byte(cinfo, cinfo->comps_in_scan); |
327 | 327 | ||
328 | for (i = 0; i < cinfo->comps_in_scan; i++) { | 328 | for (i = 0; i < cinfo->comps_in_scan; i++) { |
329 | compptr = cinfo->cur_comp_info[i]; | 329 | compptr = cinfo->cur_comp_info[i]; |
330 | emit_byte(cinfo, compptr->component_id); | 330 | emit_byte(cinfo, compptr->component_id); |
331 | 331 | ||
332 | /* We emit 0 for unused field(s); this is recommended by the P&M text | 332 | /* We emit 0 for unused field(s); this is recommended by the P&M text |
333 | * but does not seem to be specified in the standard. | 333 | * but does not seem to be specified in the standard. |
334 | */ | 334 | */ |
335 | 335 | ||
336 | /* DC needs no table for refinement scan */ | 336 | /* DC needs no table for refinement scan */ |
337 | td = cinfo->Ss == 0 && cinfo->Ah == 0 ? compptr->dc_tbl_no : 0; | 337 | td = cinfo->Ss == 0 && cinfo->Ah == 0 ? compptr->dc_tbl_no : 0; |
338 | /* AC needs no table when not present */ | 338 | /* AC needs no table when not present */ |
339 | ta = cinfo->Se ? compptr->ac_tbl_no : 0; | 339 | ta = cinfo->Se ? compptr->ac_tbl_no : 0; |
340 | 340 | ||
341 | emit_byte(cinfo, (td << 4) + ta); | 341 | emit_byte(cinfo, (td << 4) + ta); |
342 | } | 342 | } |
343 | 343 | ||
344 | emit_byte(cinfo, cinfo->Ss); | 344 | emit_byte(cinfo, cinfo->Ss); |
345 | emit_byte(cinfo, cinfo->Se); | 345 | emit_byte(cinfo, cinfo->Se); |
346 | emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al); | 346 | emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al); |
347 | } | 347 | } |
348 | 348 | ||
349 | 349 | ||
350 | LOCAL(void) | 350 | LOCAL(void) |
351 | emit_pseudo_sos (j_compress_ptr cinfo) | 351 | emit_pseudo_sos (j_compress_ptr cinfo) |
352 | /* Emit a pseudo SOS marker */ | 352 | /* Emit a pseudo SOS marker */ |
353 | { | 353 | { |
354 | emit_marker(cinfo, M_SOS); | 354 | emit_marker(cinfo, M_SOS); |
355 | 355 | ||
356 | emit_2bytes(cinfo, 2 + 1 + 3); /* length */ | 356 | emit_2bytes(cinfo, 2 + 1 + 3); /* length */ |
357 | 357 | ||
358 | emit_byte(cinfo, 0); /* Ns */ | 358 | emit_byte(cinfo, 0); /* Ns */ |
359 | 359 | ||
360 | emit_byte(cinfo, 0); /* Ss */ | 360 | emit_byte(cinfo, 0); /* Ss */ |
361 | emit_byte(cinfo, cinfo->block_size * cinfo->block_size - 1); /* Se */ | 361 | emit_byte(cinfo, cinfo->block_size * cinfo->block_size - 1); /* Se */ |
362 | emit_byte(cinfo, 0); /* Ah/Al */ | 362 | emit_byte(cinfo, 0); /* Ah/Al */ |
363 | } | 363 | } |
364 | 364 | ||
365 | 365 | ||
366 | LOCAL(void) | 366 | LOCAL(void) |
367 | emit_jfif_app0 (j_compress_ptr cinfo) | 367 | emit_jfif_app0 (j_compress_ptr cinfo) |
368 | /* Emit a JFIF-compliant APP0 marker */ | 368 | /* Emit a JFIF-compliant APP0 marker */ |
369 | { | 369 | { |
370 | /* | 370 | /* |
371 | * Length of APP0 block (2 bytes) | 371 | * Length of APP0 block (2 bytes) |
372 | * Block ID (4 bytes - ASCII "JFIF") | 372 | * Block ID (4 bytes - ASCII "JFIF") |
373 | * Zero byte (1 byte to terminate the ID string) | 373 | * Zero byte (1 byte to terminate the ID string) |
374 | * Version Major, Minor (2 bytes - major first) | 374 | * Version Major, Minor (2 bytes - major first) |
375 | * Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm) | 375 | * Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm) |
376 | * Xdpu (2 bytes - dots per unit horizontal) | 376 | * Xdpu (2 bytes - dots per unit horizontal) |
377 | * Ydpu (2 bytes - dots per unit vertical) | 377 | * Ydpu (2 bytes - dots per unit vertical) |
378 | * Thumbnail X size (1 byte) | 378 | * Thumbnail X size (1 byte) |
379 | * Thumbnail Y size (1 byte) | 379 | * Thumbnail Y size (1 byte) |
380 | */ | 380 | */ |
381 | 381 | ||
382 | emit_marker(cinfo, M_APP0); | 382 | emit_marker(cinfo, M_APP0); |
383 | 383 | ||
384 | emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */ | 384 | emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */ |
385 | 385 | ||
386 | emit_byte(cinfo, 0x4A); /* Identifier: ASCII "JFIF" */ | 386 | emit_byte(cinfo, 0x4A); /* Identifier: ASCII "JFIF" */ |
387 | emit_byte(cinfo, 0x46); | 387 | emit_byte(cinfo, 0x46); |
388 | emit_byte(cinfo, 0x49); | 388 | emit_byte(cinfo, 0x49); |
389 | emit_byte(cinfo, 0x46); | 389 | emit_byte(cinfo, 0x46); |
390 | emit_byte(cinfo, 0); | 390 | emit_byte(cinfo, 0); |
391 | emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */ | 391 | emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */ |
392 | emit_byte(cinfo, cinfo->JFIF_minor_version); | 392 | emit_byte(cinfo, cinfo->JFIF_minor_version); |
393 | emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */ | 393 | emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */ |
394 | emit_2bytes(cinfo, (int) cinfo->X_density); | 394 | emit_2bytes(cinfo, (int) cinfo->X_density); |
395 | emit_2bytes(cinfo, (int) cinfo->Y_density); | 395 | emit_2bytes(cinfo, (int) cinfo->Y_density); |
396 | emit_byte(cinfo, 0); /* No thumbnail image */ | 396 | emit_byte(cinfo, 0); /* No thumbnail image */ |
397 | emit_byte(cinfo, 0); | 397 | emit_byte(cinfo, 0); |
398 | } | 398 | } |
399 | 399 | ||
400 | 400 | ||
401 | LOCAL(void) | 401 | LOCAL(void) |
402 | emit_adobe_app14 (j_compress_ptr cinfo) | 402 | emit_adobe_app14 (j_compress_ptr cinfo) |
403 | /* Emit an Adobe APP14 marker */ | 403 | /* Emit an Adobe APP14 marker */ |
404 | { | 404 | { |
405 | /* | 405 | /* |
406 | * Length of APP14 block (2 bytes) | 406 | * Length of APP14 block (2 bytes) |
407 | * Block ID (5 bytes - ASCII "Adobe") | 407 | * Block ID (5 bytes - ASCII "Adobe") |
408 | * Version Number (2 bytes - currently 100) | 408 | * Version Number (2 bytes - currently 100) |
409 | * Flags0 (2 bytes - currently 0) | 409 | * Flags0 (2 bytes - currently 0) |
410 | * Flags1 (2 bytes - currently 0) | 410 | * Flags1 (2 bytes - currently 0) |
411 | * Color transform (1 byte) | 411 | * Color transform (1 byte) |
412 | * | 412 | * |
413 | * Although Adobe TN 5116 mentions Version = 101, all the Adobe files | 413 | * Although Adobe TN 5116 mentions Version = 101, all the Adobe files |
414 | * now in circulation seem to use Version = 100, so that's what we write. | 414 | * now in circulation seem to use Version = 100, so that's what we write. |
415 | * | 415 | * |
416 | * We write the color transform byte as 1 if the JPEG color space is | 416 | * We write the color transform byte as 1 if the JPEG color space is |
417 | * YCbCr, 2 if it's YCCK, 0 otherwise. Adobe's definition has to do with | 417 | * YCbCr, 2 if it's YCCK, 0 otherwise. Adobe's definition has to do with |
418 | * whether the encoder performed a transformation, which is pretty useless. | 418 | * whether the encoder performed a transformation, which is pretty useless. |
419 | */ | 419 | */ |
420 | 420 | ||
421 | emit_marker(cinfo, M_APP14); | 421 | emit_marker(cinfo, M_APP14); |
422 | 422 | ||
423 | emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */ | 423 | emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */ |
424 | 424 | ||
425 | emit_byte(cinfo, 0x41); /* Identifier: ASCII "Adobe" */ | 425 | emit_byte(cinfo, 0x41); /* Identifier: ASCII "Adobe" */ |
426 | emit_byte(cinfo, 0x64); | 426 | emit_byte(cinfo, 0x64); |
427 | emit_byte(cinfo, 0x6F); | 427 | emit_byte(cinfo, 0x6F); |
428 | emit_byte(cinfo, 0x62); | 428 | emit_byte(cinfo, 0x62); |
429 | emit_byte(cinfo, 0x65); | 429 | emit_byte(cinfo, 0x65); |
430 | emit_2bytes(cinfo, 100); /* Version */ | 430 | emit_2bytes(cinfo, 100); /* Version */ |
431 | emit_2bytes(cinfo, 0); /* Flags0 */ | 431 | emit_2bytes(cinfo, 0); /* Flags0 */ |
432 | emit_2bytes(cinfo, 0); /* Flags1 */ | 432 | emit_2bytes(cinfo, 0); /* Flags1 */ |
433 | switch (cinfo->jpeg_color_space) { | 433 | switch (cinfo->jpeg_color_space) { |
434 | case JCS_YCbCr: | 434 | case JCS_YCbCr: |
435 | emit_byte(cinfo, 1); /* Color transform = 1 */ | 435 | emit_byte(cinfo, 1); /* Color transform = 1 */ |
436 | break; | 436 | break; |
437 | case JCS_YCCK: | 437 | case JCS_YCCK: |
438 | emit_byte(cinfo, 2); /* Color transform = 2 */ | 438 | emit_byte(cinfo, 2); /* Color transform = 2 */ |
439 | break; | 439 | break; |
440 | default: | 440 | default: |
441 | emit_byte(cinfo, 0); /* Color transform = 0 */ | 441 | emit_byte(cinfo, 0); /* Color transform = 0 */ |
442 | break; | 442 | break; |
443 | } | 443 | } |
444 | } | 444 | } |
445 | 445 | ||
446 | 446 | ||
447 | /* | 447 | /* |
448 | * These routines allow writing an arbitrary marker with parameters. | 448 | * These routines allow writing an arbitrary marker with parameters. |
449 | * The only intended use is to emit COM or APPn markers after calling | 449 | * The only intended use is to emit COM or APPn markers after calling |
450 | * write_file_header and before calling write_frame_header. | 450 | * write_file_header and before calling write_frame_header. |
451 | * Other uses are not guaranteed to produce desirable results. | 451 | * Other uses are not guaranteed to produce desirable results. |
452 | * Counting the parameter bytes properly is the caller's responsibility. | 452 | * Counting the parameter bytes properly is the caller's responsibility. |
453 | */ | 453 | */ |
454 | 454 | ||
455 | METHODDEF(void) | 455 | METHODDEF(void) |
456 | write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen) | 456 | write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen) |
457 | /* Emit an arbitrary marker header */ | 457 | /* Emit an arbitrary marker header */ |
458 | { | 458 | { |
459 | if (datalen > (unsigned int) 65533) /* safety check */ | 459 | if (datalen > (unsigned int) 65533) /* safety check */ |
460 | ERREXIT(cinfo, JERR_BAD_LENGTH); | 460 | ERREXIT(cinfo, JERR_BAD_LENGTH); |
461 | 461 | ||
462 | emit_marker(cinfo, (JPEG_MARKER) marker); | 462 | emit_marker(cinfo, (JPEG_MARKER) marker); |
463 | 463 | ||
464 | emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */ | 464 | emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */ |
465 | } | 465 | } |
466 | 466 | ||
467 | METHODDEF(void) | 467 | METHODDEF(void) |
468 | write_marker_byte (j_compress_ptr cinfo, int val) | 468 | write_marker_byte (j_compress_ptr cinfo, int val) |
469 | /* Emit one byte of marker parameters following write_marker_header */ | 469 | /* Emit one byte of marker parameters following write_marker_header */ |
470 | { | 470 | { |
471 | emit_byte(cinfo, val); | 471 | emit_byte(cinfo, val); |
472 | } | 472 | } |
473 | 473 | ||
474 | 474 | ||
475 | /* | 475 | /* |
476 | * Write datastream header. | 476 | * Write datastream header. |
477 | * This consists of an SOI and optional APPn markers. | 477 | * This consists of an SOI and optional APPn markers. |
478 | * We recommend use of the JFIF marker, but not the Adobe marker, | 478 | * We recommend use of the JFIF marker, but not the Adobe marker, |
479 | * when using YCbCr or grayscale data. The JFIF marker should NOT | 479 | * when using YCbCr or grayscale data. The JFIF marker should NOT |
480 | * be used for any other JPEG colorspace. The Adobe marker is helpful | 480 | * be used for any other JPEG colorspace. The Adobe marker is helpful |
481 | * to distinguish RGB, CMYK, and YCCK colorspaces. | 481 | * to distinguish RGB, CMYK, and YCCK colorspaces. |
482 | * Note that an application can write additional header markers after | 482 | * Note that an application can write additional header markers after |
483 | * jpeg_start_compress returns. | 483 | * jpeg_start_compress returns. |
484 | */ | 484 | */ |
485 | 485 | ||
486 | METHODDEF(void) | 486 | METHODDEF(void) |
487 | write_file_header (j_compress_ptr cinfo) | 487 | write_file_header (j_compress_ptr cinfo) |
488 | { | 488 | { |
489 | my_marker_ptr marker = (my_marker_ptr) cinfo->marker; | 489 | my_marker_ptr marker = (my_marker_ptr) cinfo->marker; |
490 | 490 | ||
491 | emit_marker(cinfo, M_SOI); /* first the SOI */ | 491 | emit_marker(cinfo, M_SOI); /* first the SOI */ |
492 | 492 | ||
493 | /* SOI is defined to reset restart interval to 0 */ | 493 | /* SOI is defined to reset restart interval to 0 */ |
494 | marker->last_restart_interval = 0; | 494 | marker->last_restart_interval = 0; |
495 | 495 | ||
496 | if (cinfo->write_JFIF_header) /* next an optional JFIF APP0 */ | 496 | if (cinfo->write_JFIF_header) /* next an optional JFIF APP0 */ |
497 | emit_jfif_app0(cinfo); | 497 | emit_jfif_app0(cinfo); |
498 | if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */ | 498 | if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */ |
499 | emit_adobe_app14(cinfo); | 499 | emit_adobe_app14(cinfo); |
500 | } | 500 | } |
501 | 501 | ||
502 | 502 | ||
503 | /* | 503 | /* |
504 | * Write frame header. | 504 | * Write frame header. |
505 | * This consists of DQT and SOFn markers, and a conditional pseudo SOS marker. | 505 | * This consists of DQT and SOFn markers, and a conditional pseudo SOS marker. |
506 | * Note that we do not emit the SOF until we have emitted the DQT(s). | 506 | * Note that we do not emit the SOF until we have emitted the DQT(s). |
507 | * This avoids compatibility problems with incorrect implementations that | 507 | * This avoids compatibility problems with incorrect implementations that |
508 | * try to error-check the quant table numbers as soon as they see the SOF. | 508 | * try to error-check the quant table numbers as soon as they see the SOF. |
509 | */ | 509 | */ |
510 | 510 | ||
511 | METHODDEF(void) | 511 | METHODDEF(void) |
512 | write_frame_header (j_compress_ptr cinfo) | 512 | write_frame_header (j_compress_ptr cinfo) |
513 | { | 513 | { |
514 | int ci, prec; | 514 | int ci, prec; |
515 | boolean is_baseline; | 515 | boolean is_baseline; |
516 | jpeg_component_info *compptr; | 516 | jpeg_component_info *compptr; |
517 | 517 | ||
518 | /* Emit DQT for each quantization table. | 518 | /* Emit DQT for each quantization table. |
519 | * Note that emit_dqt() suppresses any duplicate tables. | 519 | * Note that emit_dqt() suppresses any duplicate tables. |
520 | */ | 520 | */ |
521 | prec = 0; | 521 | prec = 0; |
522 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | 522 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
523 | ci++, compptr++) { | 523 | ci++, compptr++) { |
524 | prec += emit_dqt(cinfo, compptr->quant_tbl_no); | 524 | prec += emit_dqt(cinfo, compptr->quant_tbl_no); |
525 | } | 525 | } |
526 | /* now prec is nonzero iff there are any 16-bit quant tables. */ | 526 | /* now prec is nonzero iff there are any 16-bit quant tables. */ |
527 | 527 | ||
528 | /* Check for a non-baseline specification. | 528 | /* Check for a non-baseline specification. |
529 | * Note we assume that Huffman table numbers won't be changed later. | 529 | * Note we assume that Huffman table numbers won't be changed later. |
530 | */ | 530 | */ |
531 | if (cinfo->arith_code || cinfo->progressive_mode || | 531 | if (cinfo->arith_code || cinfo->progressive_mode || |
532 | cinfo->data_precision != 8 || cinfo->block_size != DCTSIZE) { | 532 | cinfo->data_precision != 8 || cinfo->block_size != DCTSIZE) { |
533 | is_baseline = FALSE; | 533 | is_baseline = FALSE; |
534 | } else { | 534 | } else { |
535 | is_baseline = TRUE; | 535 | is_baseline = TRUE; |
536 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | 536 | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
537 | ci++, compptr++) { | 537 | ci++, compptr++) { |
538 | if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1) | 538 | if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1) |
539 | is_baseline = FALSE; | 539 | is_baseline = FALSE; |
540 | } | 540 | } |
541 | if (prec && is_baseline) { | 541 | if (prec && is_baseline) { |
542 | is_baseline = FALSE; | 542 | is_baseline = FALSE; |
543 | /* If it's baseline except for quantizer size, warn the user */ | 543 | /* If it's baseline except for quantizer size, warn the user */ |
544 | TRACEMS(cinfo, 0, JTRC_16BIT_TABLES); | 544 | TRACEMS(cinfo, 0, JTRC_16BIT_TABLES); |
545 | } | 545 | } |
546 | } | 546 | } |
547 | 547 | ||
548 | /* Emit the proper SOF marker */ | 548 | /* Emit the proper SOF marker */ |
549 | if (cinfo->arith_code) { | 549 | if (cinfo->arith_code) { |
550 | if (cinfo->progressive_mode) | 550 | if (cinfo->progressive_mode) |
551 | emit_sof(cinfo, M_SOF10); /* SOF code for progressive arithmetic */ | 551 | emit_sof(cinfo, M_SOF10); /* SOF code for progressive arithmetic */ |
552 | else | 552 | else |
553 | emit_sof(cinfo, M_SOF9); /* SOF code for sequential arithmetic */ | 553 | emit_sof(cinfo, M_SOF9); /* SOF code for sequential arithmetic */ |
554 | } else { | 554 | } else { |
555 | if (cinfo->progressive_mode) | 555 | if (cinfo->progressive_mode) |
556 | emit_sof(cinfo, M_SOF2); /* SOF code for progressive Huffman */ | 556 | emit_sof(cinfo, M_SOF2); /* SOF code for progressive Huffman */ |
557 | else if (is_baseline) | 557 | else if (is_baseline) |
558 | emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */ | 558 | emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */ |
559 | else | 559 | else |
560 | emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */ | 560 | emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */ |
561 | } | 561 | } |
562 | 562 | ||
563 | /* Check to emit pseudo SOS marker */ | 563 | /* Check to emit pseudo SOS marker */ |
564 | if (cinfo->progressive_mode && cinfo->block_size != DCTSIZE) | 564 | if (cinfo->progressive_mode && cinfo->block_size != DCTSIZE) |
565 | emit_pseudo_sos(cinfo); | 565 | emit_pseudo_sos(cinfo); |
566 | } | 566 | } |
567 | 567 | ||
568 | 568 | ||
569 | /* | 569 | /* |
570 | * Write scan header. | 570 | * Write scan header. |
571 | * This consists of DHT or DAC markers, optional DRI, and SOS. | 571 | * This consists of DHT or DAC markers, optional DRI, and SOS. |
572 | * Compressed data will be written following the SOS. | 572 | * Compressed data will be written following the SOS. |
573 | */ | 573 | */ |
574 | 574 | ||
575 | METHODDEF(void) | 575 | METHODDEF(void) |
576 | write_scan_header (j_compress_ptr cinfo) | 576 | write_scan_header (j_compress_ptr cinfo) |
577 | { | 577 | { |
578 | my_marker_ptr marker = (my_marker_ptr) cinfo->marker; | 578 | my_marker_ptr marker = (my_marker_ptr) cinfo->marker; |
579 | int i; | 579 | int i; |
580 | jpeg_component_info *compptr; | 580 | jpeg_component_info *compptr; |
581 | 581 | ||
582 | if (cinfo->arith_code) { | 582 | if (cinfo->arith_code) { |
583 | /* Emit arith conditioning info. We may have some duplication | 583 | /* Emit arith conditioning info. We may have some duplication |
584 | * if the file has multiple scans, but it's so small it's hardly | 584 | * if the file has multiple scans, but it's so small it's hardly |
585 | * worth worrying about. | 585 | * worth worrying about. |
586 | */ | 586 | */ |
587 | emit_dac(cinfo); | 587 | emit_dac(cinfo); |
588 | } else { | 588 | } else { |
589 | /* Emit Huffman tables. | 589 | /* Emit Huffman tables. |
590 | * Note that emit_dht() suppresses any duplicate tables. | 590 | * Note that emit_dht() suppresses any duplicate tables. |
591 | */ | 591 | */ |
592 | for (i = 0; i < cinfo->comps_in_scan; i++) { | 592 | for (i = 0; i < cinfo->comps_in_scan; i++) { |
593 | compptr = cinfo->cur_comp_info[i]; | 593 | compptr = cinfo->cur_comp_info[i]; |
594 | /* DC needs no table for refinement scan */ | 594 | /* DC needs no table for refinement scan */ |
595 | if (cinfo->Ss == 0 && cinfo->Ah == 0) | 595 | if (cinfo->Ss == 0 && cinfo->Ah == 0) |
596 | emit_dht(cinfo, compptr->dc_tbl_no, FALSE); | 596 | emit_dht(cinfo, compptr->dc_tbl_no, FALSE); |
597 | /* AC needs no table when not present */ | 597 | /* AC needs no table when not present */ |
598 | if (cinfo->Se) | 598 | if (cinfo->Se) |
599 | emit_dht(cinfo, compptr->ac_tbl_no, TRUE); | 599 | emit_dht(cinfo, compptr->ac_tbl_no, TRUE); |
600 | } | 600 | } |
601 | } | 601 | } |
602 | 602 | ||
603 | /* Emit DRI if required --- note that DRI value could change for each scan. | 603 | /* Emit DRI if required --- note that DRI value could change for each scan. |
604 | * We avoid wasting space with unnecessary DRIs, however. | 604 | * We avoid wasting space with unnecessary DRIs, however. |
605 | */ | 605 | */ |
606 | if (cinfo->restart_interval != marker->last_restart_interval) { | 606 | if (cinfo->restart_interval != marker->last_restart_interval) { |
607 | emit_dri(cinfo); | 607 | emit_dri(cinfo); |
608 | marker->last_restart_interval = cinfo->restart_interval; | 608 | marker->last_restart_interval = cinfo->restart_interval; |
609 | } | 609 | } |
610 | 610 | ||
611 | emit_sos(cinfo); | 611 | emit_sos(cinfo); |
612 | } | 612 | } |
613 | 613 | ||
614 | 614 | ||
615 | /* | 615 | /* |
616 | * Write datastream trailer. | 616 | * Write datastream trailer. |
617 | */ | 617 | */ |
618 | 618 | ||
619 | METHODDEF(void) | 619 | METHODDEF(void) |
620 | write_file_trailer (j_compress_ptr cinfo) | 620 | write_file_trailer (j_compress_ptr cinfo) |
621 | { | 621 | { |
622 | emit_marker(cinfo, M_EOI); | 622 | emit_marker(cinfo, M_EOI); |
623 | } | 623 | } |
624 | 624 | ||
625 | 625 | ||
626 | /* | 626 | /* |
627 | * Write an abbreviated table-specification datastream. | 627 | * Write an abbreviated table-specification datastream. |
628 | * This consists of SOI, DQT and DHT tables, and EOI. | 628 | * This consists of SOI, DQT and DHT tables, and EOI. |
629 | * Any table that is defined and not marked sent_table = TRUE will be | 629 | * Any table that is defined and not marked sent_table = TRUE will be |
630 | * emitted. Note that all tables will be marked sent_table = TRUE at exit. | 630 | * emitted. Note that all tables will be marked sent_table = TRUE at exit. |
631 | */ | 631 | */ |
632 | 632 | ||
633 | METHODDEF(void) | 633 | METHODDEF(void) |
634 | write_tables_only (j_compress_ptr cinfo) | 634 | write_tables_only (j_compress_ptr cinfo) |
635 | { | 635 | { |
636 | int i; | 636 | int i; |
637 | 637 | ||
638 | emit_marker(cinfo, M_SOI); | 638 | emit_marker(cinfo, M_SOI); |
639 | 639 | ||
640 | for (i = 0; i < NUM_QUANT_TBLS; i++) { | 640 | for (i = 0; i < NUM_QUANT_TBLS; i++) { |
641 | if (cinfo->quant_tbl_ptrs[i] != NULL) | 641 | if (cinfo->quant_tbl_ptrs[i] != NULL) |
642 | (void) emit_dqt(cinfo, i); | 642 | (void) emit_dqt(cinfo, i); |
643 | } | 643 | } |
644 | 644 | ||
645 | if (! cinfo->arith_code) { | 645 | if (! cinfo->arith_code) { |
646 | for (i = 0; i < NUM_HUFF_TBLS; i++) { | 646 | for (i = 0; i < NUM_HUFF_TBLS; i++) { |
647 | if (cinfo->dc_huff_tbl_ptrs[i] != NULL) | 647 | if (cinfo->dc_huff_tbl_ptrs[i] != NULL) |
648 | emit_dht(cinfo, i, FALSE); | 648 | emit_dht(cinfo, i, FALSE); |
649 | if (cinfo->ac_huff_tbl_ptrs[i] != NULL) | 649 | if (cinfo->ac_huff_tbl_ptrs[i] != NULL) |
650 | emit_dht(cinfo, i, TRUE); | 650 | emit_dht(cinfo, i, TRUE); |
651 | } | 651 | } |
652 | } | 652 | } |
653 | 653 | ||
654 | emit_marker(cinfo, M_EOI); | 654 | emit_marker(cinfo, M_EOI); |
655 | } | 655 | } |
656 | 656 | ||
657 | 657 | ||
658 | /* | 658 | /* |
659 | * Initialize the marker writer module. | 659 | * Initialize the marker writer module. |
660 | */ | 660 | */ |
661 | 661 | ||
662 | GLOBAL(void) | 662 | GLOBAL(void) |
663 | jinit_marker_writer (j_compress_ptr cinfo) | 663 | jinit_marker_writer (j_compress_ptr cinfo) |
664 | { | 664 | { |
665 | my_marker_ptr marker; | 665 | my_marker_ptr marker; |
666 | 666 | ||
667 | /* Create the subobject */ | 667 | /* Create the subobject */ |
668 | marker = (my_marker_ptr) | 668 | marker = (my_marker_ptr) |
669 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 669 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
670 | SIZEOF(my_marker_writer)); | 670 | SIZEOF(my_marker_writer)); |
671 | cinfo->marker = (struct jpeg_marker_writer *) marker; | 671 | cinfo->marker = (struct jpeg_marker_writer *) marker; |
672 | /* Initialize method pointers */ | 672 | /* Initialize method pointers */ |
673 | marker->pub.write_file_header = write_file_header; | 673 | marker->pub.write_file_header = write_file_header; |
674 | marker->pub.write_frame_header = write_frame_header; | 674 | marker->pub.write_frame_header = write_frame_header; |
675 | marker->pub.write_scan_header = write_scan_header; | 675 | marker->pub.write_scan_header = write_scan_header; |
676 | marker->pub.write_file_trailer = write_file_trailer; | 676 | marker->pub.write_file_trailer = write_file_trailer; |
677 | marker->pub.write_tables_only = write_tables_only; | 677 | marker->pub.write_tables_only = write_tables_only; |
678 | marker->pub.write_marker_header = write_marker_header; | 678 | marker->pub.write_marker_header = write_marker_header; |
679 | marker->pub.write_marker_byte = write_marker_byte; | 679 | marker->pub.write_marker_byte = write_marker_byte; |
680 | /* Initialize private state */ | 680 | /* Initialize private state */ |
681 | marker->last_restart_interval = 0; | 681 | marker->last_restart_interval = 0; |
682 | } | 682 | } |