vlc: Add header #include when the types are used
[libav.git] / libavcodec / faxcompr.c
1 /*
2 * CCITT Fax Group 3 and 4 decompression
3 * Copyright (c) 2008 Konstantin Shishkov
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * CCITT Fax Group 3 and 4 decompression
25 * @author Konstantin Shishkov
26 */
27 #include "avcodec.h"
28 #include "bitstream.h"
29 #include "put_bits.h"
30 #include "vlc.h"
31 #include "faxcompr.h"
32
33 #define CCITT_SYMS 104
34
35 static const uint16_t ccitt_syms[CCITT_SYMS] = {
36 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
37 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
38 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
39 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
40 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
41 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896,
42 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728,
43 1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, 2304, 2368, 2432, 2496, 2560
44 };
45
46 static const uint8_t ccitt_codes_bits[2][CCITT_SYMS] =
47 {
48 {
49 0x35, 0x07, 0x07, 0x08, 0x0B, 0x0C, 0x0E, 0x0F, 0x13, 0x14, 0x07, 0x08, 0x08,
50 0x03, 0x34, 0x35, 0x2A, 0x2B, 0x27, 0x0C, 0x08, 0x17, 0x03, 0x04, 0x28, 0x2B,
51 0x13, 0x24, 0x18, 0x02, 0x03, 0x1A, 0x1B, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
52 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x04, 0x05, 0x0A, 0x0B, 0x52, 0x53, 0x54,
53 0x55, 0x24, 0x25, 0x58, 0x59, 0x5A, 0x5B, 0x4A, 0x4B, 0x32, 0x33, 0x34, 0x1B,
54 0x12, 0x17, 0x37, 0x36, 0x37, 0x64, 0x65, 0x68, 0x67, 0xCC, 0xCD, 0xD2, 0xD3,
55 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0x98, 0x99, 0x9A, 0x18, 0x9B,
56 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
57 },
58 {
59 0x37, 0x02, 0x03, 0x02, 0x03, 0x03, 0x02, 0x03, 0x05, 0x04, 0x04, 0x05, 0x07,
60 0x04, 0x07, 0x18, 0x17, 0x18, 0x08, 0x67, 0x68, 0x6C, 0x37, 0x28, 0x17, 0x18,
61 0xCA, 0xCB, 0xCC, 0xCD, 0x68, 0x69, 0x6A, 0x6B, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
62 0xD7, 0x6C, 0x6D, 0xDA, 0xDB, 0x54, 0x55, 0x56, 0x57, 0x64, 0x65, 0x52, 0x53,
63 0x24, 0x37, 0x38, 0x27, 0x28, 0x58, 0x59, 0x2B, 0x2C, 0x5A, 0x66, 0x67, 0x0F,
64 0xC8, 0xC9, 0x5B, 0x33, 0x34, 0x35, 0x6C, 0x6D, 0x4A, 0x4B, 0x4C, 0x4D, 0x72,
65 0x73, 0x74, 0x75, 0x76, 0x77, 0x52, 0x53, 0x54, 0x55, 0x5A, 0x5B, 0x64, 0x65,
66 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
67 }
68 };
69
70 static const uint8_t ccitt_codes_lens[2][CCITT_SYMS] =
71 {
72 {
73 8, 6, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7,
74 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
75 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
76 8, 8, 8, 8, 5, 5, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9,
77 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 9, 11, 11, 11, 12, 12, 12, 12, 12, 12,
78 12, 12, 12, 12
79 },
80 {
81 10, 3, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10, 11,
82 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
83 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
84 12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13,
85 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 12, 12, 12, 12, 12, 12,
86 12, 12, 12, 12
87 }
88 };
89
90 static const uint8_t ccitt_group3_2d_bits[11] = {
91 1, 1, 2, 2, 2, 1, 3, 3, 3, 1, 1
92 };
93
94 static const uint8_t ccitt_group3_2d_lens[11] = {
95 4, 3, 7, 6, 3, 1, 3, 6, 7, 7, 9
96 };
97
98 static VLC ccitt_vlc[2], ccitt_group3_2d_vlc;
99
100 av_cold void ff_ccitt_unpack_init(void)
101 {
102 static VLC_TYPE code_table1[528][2];
103 static VLC_TYPE code_table2[648][2];
104 int i;
105 static int initialized = 0;
106
107 if (initialized)
108 return;
109 ccitt_vlc[0].table = code_table1;
110 ccitt_vlc[0].table_allocated = 528;
111 ccitt_vlc[1].table = code_table2;
112 ccitt_vlc[1].table_allocated = 648;
113 for (i = 0; i < 2; i++) {
114 ff_init_vlc_sparse(&ccitt_vlc[i], 9, CCITT_SYMS,
115 ccitt_codes_lens[i], 1, 1,
116 ccitt_codes_bits[i], 1, 1,
117 ccitt_syms, 2, 2,
118 INIT_VLC_USE_NEW_STATIC);
119 }
120 INIT_VLC_STATIC(&ccitt_group3_2d_vlc, 9, 11,
121 ccitt_group3_2d_lens, 1, 1,
122 ccitt_group3_2d_bits, 1, 1, 512);
123 initialized = 1;
124 }
125
126
127 static int decode_group3_1d_line(AVCodecContext *avctx, BitstreamContext *bc,
128 unsigned int pix_left, int *runs,
129 const int *runend)
130 {
131 int mode = 0;
132 unsigned int run = 0;
133 unsigned int t;
134 for (;;) {
135 t = bitstream_read_vlc(bc, ccitt_vlc[mode].table, 9, 2);
136 run += t;
137 if (t < 64) {
138 *runs++ = run;
139 if (runs >= runend) {
140 av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
141 return AVERROR_INVALIDDATA;
142 }
143 if (pix_left <= run) {
144 if (pix_left == run)
145 break;
146 av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
147 return AVERROR_INVALIDDATA;
148 }
149 pix_left -= run;
150 run = 0;
151 mode = !mode;
152 } else if ((int)t == -1) {
153 av_log(avctx, AV_LOG_ERROR, "Incorrect code\n");
154 return AVERROR_INVALIDDATA;
155 }
156 }
157 *runs++ = 0;
158 return 0;
159 }
160
161 static int decode_group3_2d_line(AVCodecContext *avctx, BitstreamContext *bc,
162 unsigned int width, int *runs,
163 const int *runend, const int *ref)
164 {
165 int mode = 0, saved_run = 0, t;
166 int run_off = *ref++;
167 unsigned int offs = 0, run = 0;
168
169 runend--; // for the last written 0
170
171 while (offs < width) {
172 int cmode = bitstream_read_vlc(bc, ccitt_group3_2d_vlc.table, 9, 1);
173 if (cmode == -1) {
174 av_log(avctx, AV_LOG_ERROR, "Incorrect mode VLC\n");
175 return AVERROR_INVALIDDATA;
176 }
177 if (!cmode) { //pass mode
178 run_off += *ref++;
179 run = run_off - offs;
180 offs = run_off;
181 run_off += *ref++;
182 if (offs > width) {
183 av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
184 return AVERROR_INVALIDDATA;
185 }
186 saved_run += run;
187 } else if (cmode == 1) { //horizontal mode
188 int k;
189 for (k = 0; k < 2; k++) {
190 run = 0;
191 for (;;) {
192 t = bitstream_read_vlc(bc, ccitt_vlc[mode].table, 9, 2);
193 if (t == -1) {
194 av_log(avctx, AV_LOG_ERROR, "Incorrect code\n");
195 return AVERROR_INVALIDDATA;
196 }
197 run += t;
198 if (t < 64)
199 break;
200 }
201 *runs++ = run + saved_run;
202 if (runs >= runend) {
203 av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
204 return AVERROR_INVALIDDATA;
205 }
206 saved_run = 0;
207 offs += run;
208 if (offs > width || run > width) {
209 av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
210 return AVERROR_INVALIDDATA;
211 }
212 mode = !mode;
213 }
214 } else if (cmode == 9 || cmode == 10) {
215 avpriv_report_missing_feature(avctx, "Special modes support");
216 return AVERROR_PATCHWELCOME;
217 } else { //vertical mode
218 run = run_off - offs + (cmode - 5);
219 run_off -= *--ref;
220 offs += run;
221 if (offs > width || run > width) {
222 av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
223 return AVERROR_INVALIDDATA;
224 }
225 *runs++ = run + saved_run;
226 if (runs >= runend) {
227 av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
228 return AVERROR_INVALIDDATA;
229 }
230 saved_run = 0;
231 mode = !mode;
232 }
233 //sync line pointers
234 while (run_off <= offs) {
235 run_off += *ref++;
236 run_off += *ref++;
237 }
238 }
239 *runs++ = saved_run;
240 *runs++ = 0;
241 return 0;
242 }
243
244 static void put_line(uint8_t *dst, int size, int width, const int *runs)
245 {
246 PutBitContext pb;
247 int run, mode = ~0, pix_left = width, run_idx = 0;
248
249 init_put_bits(&pb, dst, size * 8);
250 while (pix_left > 0) {
251 run = runs[run_idx++];
252 mode = ~mode;
253 pix_left -= run;
254 for (; run > 16; run -= 16)
255 put_sbits(&pb, 16, mode);
256 if (run)
257 put_sbits(&pb, run, mode);
258 }
259 flush_put_bits(&pb);
260 }
261
262 static int find_group3_syncmarker(BitstreamContext *bc, int srcsize)
263 {
264 unsigned int state = -1;
265 srcsize -= bitstream_tell(bc);
266 while (srcsize-- > 0) {
267 state += state + bitstream_read_bit(bc);
268 if ((state & 0xFFF) == 1)
269 return 0;
270 }
271 return -1;
272 }
273
274 int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize,
275 uint8_t *dst, int height, int stride,
276 enum TiffCompr compr, int opts)
277 {
278 int j;
279 BitstreamContext bc;
280 int *runs, *ref = NULL, *runend;
281 int ret;
282 int runsize = avctx->width + 2;
283
284 runs = av_malloc(runsize * sizeof(runs[0]));
285 ref = av_malloc(runsize * sizeof(ref[0]));
286 if (!runs || !ref) {
287 ret = AVERROR(ENOMEM);
288 goto fail;
289 }
290 ref[0] = avctx->width;
291 ref[1] = 0;
292 ref[2] = 0;
293 bitstream_init8(&bc, src, srcsize);
294 for (j = 0; j < height; j++) {
295 runend = runs + runsize;
296 if (compr == TIFF_G4) {
297 ret = decode_group3_2d_line(avctx, &bc, avctx->width, runs, runend,
298 ref);
299 if (ret < 0)
300 goto fail;
301 } else {
302 int g3d1 = (compr == TIFF_G3) && !(opts & 1);
303 if (compr != TIFF_CCITT_RLE &&
304 find_group3_syncmarker(&bc, srcsize * 8) < 0)
305 break;
306 if (compr == TIFF_CCITT_RLE || g3d1 || bitstream_read_bit(&bc))
307 ret = decode_group3_1d_line(avctx, &bc, avctx->width, runs,
308 runend);
309 else
310 ret = decode_group3_2d_line(avctx, &bc, avctx->width, runs,
311 runend, ref);
312 if (compr == TIFF_CCITT_RLE)
313 bitstream_align(&bc);
314 }
315 if (avctx->err_recognition & AV_EF_EXPLODE && ret < 0)
316 goto fail;
317
318 if (ret < 0) {
319 put_line(dst, stride, avctx->width, ref);
320 } else {
321 put_line(dst, stride, avctx->width, runs);
322 FFSWAP(int *, runs, ref);
323 }
324 dst += stride;
325 }
326 ret = 0;
327 fail:
328 av_free(runs);
329 av_free(ref);
330 return ret;
331 }