FFmpeg  4.3.7
faxcompr.c
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1 /*
2  * CCITT Fax Group 3 and 4 decompression
3  * Copyright (c) 2008 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "get_bits.h"
29 #include "put_bits.h"
30 #include "faxcompr.h"
31 
32 #define CCITT_SYMS 104
33 
34 static const uint16_t ccitt_syms[CCITT_SYMS] = {
35  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
36  13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
37  26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
38  39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
39  52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
40  128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896,
41  960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728,
42  1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, 2304, 2368, 2432, 2496, 2560
43 };
44 
46 {
47  {
48  0x35, 0x07, 0x07, 0x08, 0x0B, 0x0C, 0x0E, 0x0F, 0x13, 0x14, 0x07, 0x08, 0x08,
49  0x03, 0x34, 0x35, 0x2A, 0x2B, 0x27, 0x0C, 0x08, 0x17, 0x03, 0x04, 0x28, 0x2B,
50  0x13, 0x24, 0x18, 0x02, 0x03, 0x1A, 0x1B, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
51  0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x04, 0x05, 0x0A, 0x0B, 0x52, 0x53, 0x54,
52  0x55, 0x24, 0x25, 0x58, 0x59, 0x5A, 0x5B, 0x4A, 0x4B, 0x32, 0x33, 0x34, 0x1B,
53  0x12, 0x17, 0x37, 0x36, 0x37, 0x64, 0x65, 0x68, 0x67, 0xCC, 0xCD, 0xD2, 0xD3,
54  0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0x98, 0x99, 0x9A, 0x18, 0x9B,
55  0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
56  },
57  {
58  0x37, 0x02, 0x03, 0x02, 0x03, 0x03, 0x02, 0x03, 0x05, 0x04, 0x04, 0x05, 0x07,
59  0x04, 0x07, 0x18, 0x17, 0x18, 0x08, 0x67, 0x68, 0x6C, 0x37, 0x28, 0x17, 0x18,
60  0xCA, 0xCB, 0xCC, 0xCD, 0x68, 0x69, 0x6A, 0x6B, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
61  0xD7, 0x6C, 0x6D, 0xDA, 0xDB, 0x54, 0x55, 0x56, 0x57, 0x64, 0x65, 0x52, 0x53,
62  0x24, 0x37, 0x38, 0x27, 0x28, 0x58, 0x59, 0x2B, 0x2C, 0x5A, 0x66, 0x67, 0x0F,
63  0xC8, 0xC9, 0x5B, 0x33, 0x34, 0x35, 0x6C, 0x6D, 0x4A, 0x4B, 0x4C, 0x4D, 0x72,
64  0x73, 0x74, 0x75, 0x76, 0x77, 0x52, 0x53, 0x54, 0x55, 0x5A, 0x5B, 0x64, 0x65,
65  0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
66  }
67 };
68 
70 {
71  {
72  8, 6, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7,
73  7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
74  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
75  8, 8, 8, 8, 5, 5, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9,
76  9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 9, 11, 11, 11, 12, 12, 12, 12, 12, 12,
77  12, 12, 12, 12
78  },
79  {
80  10, 3, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10, 11,
81  11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
82  12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
83  12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13,
84  13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 12, 12, 12, 12, 12, 12,
85  12, 12, 12, 12
86  }
87 };
88 
89 static const uint8_t ccitt_group3_2d_bits[11] = {
90  1, 1, 2, 2, 2, 1, 3, 3, 3, 1, 1
91 };
92 
93 static const uint8_t ccitt_group3_2d_lens[11] = {
94  4, 3, 7, 6, 3, 1, 3, 6, 7, 7, 9
95 };
96 
98 
100 {
101  static VLC_TYPE code_table1[528][2];
102  static VLC_TYPE code_table2[648][2];
103  int i;
104  static int initialized = 0;
105 
106  if (initialized)
107  return;
108  ccitt_vlc[0].table = code_table1;
109  ccitt_vlc[0].table_allocated = 528;
110  ccitt_vlc[1].table = code_table2;
111  ccitt_vlc[1].table_allocated = 648;
112  for (i = 0; i < 2; i++) {
113  ff_init_vlc_sparse(&ccitt_vlc[i], 9, CCITT_SYMS,
114  ccitt_codes_lens[i], 1, 1,
115  ccitt_codes_bits[i], 1, 1,
116  ccitt_syms, 2, 2,
118  }
119  INIT_VLC_STATIC(&ccitt_group3_2d_vlc, 9, 11,
120  ccitt_group3_2d_lens, 1, 1,
121  ccitt_group3_2d_bits, 1, 1, 512);
122  initialized = 1;
123 }
124 
126  unsigned int *pix_left, int **runs,
127  const int *runend, int *mode)
128 {
129  int eob = 0;
130  int newmode;
131  int saved_run = 0;
132 
133  do {
134  int cwi, k;
135  int cw = 0;
136  int codes[2];
137  do {
138  cwi = show_bits(gb, 11);
139  if (!cwi) {
140  av_log(avctx, AV_LOG_ERROR, "Invalid uncompressed codeword\n");
141  return AVERROR_INVALIDDATA;
142  }
143  cwi = 10 - av_log2(cwi);
144  if (get_bits_left(gb) < cwi + 1)
145  return AVERROR_INVALIDDATA;
146  skip_bits(gb, cwi + 1);
147  if (cwi > 5) {
148  newmode = get_bits1(gb);
149  eob = 1;
150  cwi -= 6;
151  }
152  cw += cwi;
153  } while(cwi == 5);
154 
155  codes[0] = cw;
156  codes[1] = !eob;
157 
158  for (k = 0; k < 2; k++) {
159  if (codes[k]) {
160  if (*mode == !k) {
161  *(*runs)++ = saved_run;
162  if (*runs >= runend) {
163  av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
164  return AVERROR_INVALIDDATA;
165  }
166  if (*pix_left <= saved_run) {
167  av_log(avctx, AV_LOG_ERROR, "uncompressed run went out of bounds\n");
168  return AVERROR_INVALIDDATA;
169  }
170  *pix_left -= saved_run;
171  saved_run = 0;
172  *mode = !*mode;
173  }
174  saved_run += codes[k];
175  }
176  }
177  } while (!eob);
178  *(*runs)++ = saved_run;
179  if (*runs >= runend) {
180  av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
181  return AVERROR_INVALIDDATA;
182  }
183  if (*pix_left <= saved_run) {
184  if (*pix_left == saved_run)
185  return 1;
186  av_log(avctx, AV_LOG_ERROR, "uncompressed run went out of boundsE\n");
187  return AVERROR_INVALIDDATA;
188  }
189  *pix_left -= saved_run;
190  saved_run = 0;
191  *mode = !*mode;
192  if (newmode != *mode) { //FIXME CHECK
193  *(*runs)++ = 0;
194  if (*runs >= runend) {
195  av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
196  return AVERROR_INVALIDDATA;
197  }
198  *mode = newmode;
199  }
200  return 0;
201 }
202 
204  unsigned int pix_left, int *runs,
205  const int *runend)
206 {
207  int mode = 0;
208  unsigned int run = 0;
209  unsigned int t;
210  for (;;) {
211  if (get_bits_left(gb) <= 0)
212  return AVERROR_INVALIDDATA;
213  t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2);
214  run += t;
215  if (t < 64) {
216  *runs++ = run;
217  if (runs >= runend) {
218  av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
219  return AVERROR_INVALIDDATA;
220  }
221  if (pix_left <= run) {
222  if (pix_left == run)
223  break;
224  av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
225  return AVERROR_INVALIDDATA;
226  }
227  pix_left -= run;
228  run = 0;
229  mode = !mode;
230  } else if ((int)t == -1) {
231  if (get_bits_left(gb) > 12 && show_bits(gb, 12) == 15) {
232  int ret;
233  skip_bits(gb, 12);
234  ret = decode_uncompressed(avctx, gb, &pix_left, &runs, runend, &mode);
235  if (ret < 0) {
236  return ret;
237  } else if (ret)
238  break;
239  } else {
240  av_log(avctx, AV_LOG_ERROR, "Incorrect code\n");
241  return AVERROR_INVALIDDATA;
242  }
243  }
244  }
245  *runs++ = 0;
246  return 0;
247 }
248 
250  unsigned int width, int *runs,
251  const int *runend, const int *ref)
252 {
253  int mode = 0, saved_run = 0, t;
254  int run_off = *ref++;
255  unsigned int offs = 0, run = 0;
256 
257  while (offs < width) {
258  int cmode;
259  if (get_bits_left(gb) <= 0)
260  return AVERROR_INVALIDDATA;
261  cmode = get_vlc2(gb, ccitt_group3_2d_vlc.table, 9, 1);
262  if (cmode == -1) {
263  av_log(avctx, AV_LOG_ERROR, "Incorrect mode VLC\n");
264  return AVERROR_INVALIDDATA;
265  }
266  if (!cmode) { //pass mode
267  if (run_off < width)
268  run_off += *ref++;
269  run = run_off - offs;
270  offs = run_off;
271  if (run_off < width)
272  run_off += *ref++;
273  if (offs > width) {
274  av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
275  return AVERROR_INVALIDDATA;
276  }
277  saved_run += run;
278  } else if (cmode == 1) { //horizontal mode
279  int k;
280  for (k = 0; k < 2; k++) {
281  run = 0;
282  for (;;) {
283  if (get_bits_left(gb) <= 0)
284  return AVERROR_INVALIDDATA;
285  t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2);
286  if (t == -1) {
287  av_log(avctx, AV_LOG_ERROR, "Incorrect code\n");
288  return AVERROR_INVALIDDATA;
289  }
290  run += t;
291  if (t < 64)
292  break;
293  }
294  *runs++ = run + saved_run;
295  if (runs >= runend) {
296  av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
297  return AVERROR_INVALIDDATA;
298  }
299  saved_run = 0;
300  offs += run;
301  if (offs > width || run > width) {
302  av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
303  return AVERROR_INVALIDDATA;
304  }
305  mode = !mode;
306  }
307  } else if (cmode == 9 || cmode == 10) {
308  int xxx;
309  if (get_bits_left(gb) < 3)
310  return AVERROR_INVALIDDATA;
311  xxx = get_bits(gb, 3);
312  if (cmode == 9 && xxx == 7) {
313  int ret;
314  int pix_left = width - offs;
315 
316  if (saved_run) {
317  av_log(avctx, AV_LOG_ERROR, "saved run %d on entering uncompressed mode\n", saved_run);
318  return AVERROR_INVALIDDATA;
319  }
320  ret = decode_uncompressed(avctx, gb, &pix_left, &runs, runend, &mode);
321  offs = width - pix_left;
322  if (ret < 0) {
323  return ret;
324  } else if (ret)
325  break;
326  } else {
327  avpriv_report_missing_feature(avctx, "Special mode %d xxx=%d support", cmode, xxx);
328  return AVERROR_PATCHWELCOME;
329  }
330  } else { //vertical mode
331  run = run_off - offs + (cmode - 5);
332  run_off -= *--ref;
333  offs += run;
334  if (offs > width || run > width) {
335  av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n");
336  return AVERROR_INVALIDDATA;
337  }
338  *runs++ = run + saved_run;
339  if (runs >= runend) {
340  av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
341  return AVERROR_INVALIDDATA;
342  }
343  saved_run = 0;
344  mode = !mode;
345  }
346  //sync line pointers
347  while (offs < width && run_off <= offs) {
348  run_off += *ref++;
349  run_off += *ref++;
350  }
351  }
352  *runs++ = saved_run;
353  if (saved_run) {
354  if (runs >= runend) {
355  av_log(avctx, AV_LOG_ERROR, "Run overrun\n");
356  return -1;
357  }
358  *runs++ = 0;
359  }
360  return 0;
361 }
362 
363 static void put_line(uint8_t *dst, int size, int width, const int *runs)
364 {
365  PutBitContext pb;
366  int run, mode = ~0, pix_left = width, run_idx = 0;
367 
368  init_put_bits(&pb, dst, size);
369  while (pix_left > 0) {
370  run = runs[run_idx++];
371  mode = ~mode;
372  pix_left -= run;
373  for (; run > 16; run -= 16)
374  put_sbits(&pb, 16, mode);
375  if (run)
376  put_sbits(&pb, run, mode);
377  }
378  flush_put_bits(&pb);
379 }
380 
381 static int find_group3_syncmarker(GetBitContext *gb, int srcsize)
382 {
383  unsigned int state = -1;
384  srcsize -= get_bits_count(gb);
385  while (srcsize-- > 0) {
386  state += state + get_bits1(gb);
387  if ((state & 0xFFF) == 1)
388  return 0;
389  }
390  return -1;
391 }
392 
393 int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize,
394  uint8_t *dst, int height, int stride,
395  enum TiffCompr compr, int opts)
396 {
397  int j;
398  GetBitContext gb;
399  int *runs, *ref = NULL, *runend;
400  int ret;
401  int runsize = avctx->width + 2;
402  int has_eol;
403 
404  runs = av_malloc_array(runsize, sizeof(runs[0]));
405  ref = av_malloc_array(runsize, sizeof(ref[0]));
406  if (!runs || !ref) {
407  ret = AVERROR(ENOMEM);
408  goto fail;
409  }
410  ref[0] = avctx->width;
411  ref[1] = 0;
412  ref[2] = 0;
413  if ((ret = init_get_bits8(&gb, src, srcsize)) < 0)
414  goto fail;
415  has_eol = show_bits(&gb, 12) == 1 || show_bits(&gb, 16) == 1;
416 
417  for (j = 0; j < height; j++) {
418  runend = runs + runsize;
419  if (compr == TIFF_G4) {
420  ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, runend,
421  ref);
422  if (ret < 0)
423  goto fail;
424  } else {
425  int g3d1 = (compr == TIFF_G3) && !(opts & 1);
426  if (compr != TIFF_CCITT_RLE &&
427  has_eol &&
428  find_group3_syncmarker(&gb, srcsize * 8) < 0)
429  break;
430  if (compr == TIFF_CCITT_RLE || g3d1 || get_bits1(&gb))
431  ret = decode_group3_1d_line(avctx, &gb, avctx->width, runs,
432  runend);
433  else
434  ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs,
435  runend, ref);
436  if (compr == TIFF_CCITT_RLE)
437  align_get_bits(&gb);
438  }
439  if (avctx->err_recognition & AV_EF_EXPLODE && ret < 0)
440  goto fail;
441 
442  if (ret < 0) {
443  put_line(dst, stride, avctx->width, ref);
444  } else {
445  put_line(dst, stride, avctx->width, runs);
446  FFSWAP(int *, runs, ref);
447  }
448  dst += stride;
449  }
450  ret = 0;
451 fail:
452  av_free(runs);
453  av_free(ref);
454  return ret;
455 }
#define CCITT_SYMS
Definition: faxcompr.c:32
#define NULL
Definition: coverity.c:32
static int find_group3_syncmarker(GetBitContext *gb, int srcsize)
Definition: faxcompr.c:381
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static struct @314 state
int size
static int decode_group3_1d_line(AVCodecContext *avctx, GetBitContext *gb, unsigned int pix_left, int *runs, const int *runend)
Definition: faxcompr.c:203
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:240
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: vlc.h:75
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:273
static void put_line(uint8_t *dst, int size, int width, const int *runs)
Definition: faxcompr.c:363
uint8_t run
Definition: svq3.c:209
static int decode_group3_2d_line(AVCodecContext *avctx, GetBitContext *gb, unsigned int width, int *runs, const int *runend, const int *ref)
Definition: faxcompr.c:249
int stride
Definition: mace.c:144
Definition: tiff.h:124
static const uint8_t ccitt_group3_2d_bits[11]
Definition: faxcompr.c:89
av_cold void ff_ccitt_unpack_init(void)
initialize unpacker code
Definition: faxcompr.c:99
uint8_t
#define av_cold
Definition: attributes.h:88
#define height
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
bitstream reader API header.
#define av_log(a,...)
static const uint16_t table[]
Definition: prosumer.c:206
#define src
Definition: vp8dsp.c:254
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const uint16_t ccitt_syms[CCITT_SYMS]
Definition: faxcompr.c:34
#define AVERROR(e)
Definition: error.h:43
static const uint8_t ccitt_codes_bits[2][CCITT_SYMS]
Definition: faxcompr.c:45
int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize, uint8_t *dst, int height, int stride, enum TiffCompr compr, int opts)
unpack data compressed with CCITT Group 3 1/2-D or Group 4 method
Definition: faxcompr.c:393
#define fail()
Definition: checkasm.h:123
Definition: vlc.h:26
AVDictionary * opts
Definition: movenc.c:50
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1655
#define width
int width
picture width / height.
Definition: avcodec.h:699
static int initialized
static int decode_uncompressed(AVCodecContext *avctx, GetBitContext *gb, unsigned int *pix_left, int **runs, const int *runend, int *mode)
Definition: faxcompr.c:125
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
#define av_log2
Definition: intmath.h:83
static VLC ccitt_group3_2d_vlc
Definition: faxcompr.c:97
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int table_allocated
Definition: vlc.h:29
TiffCompr
list of TIFF, TIFF/EP and DNG compression types
Definition: tiff.h:120
Libavcodec external API header.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
main external API structure.
Definition: avcodec.h:526
Definition: tiff.h:123
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static const uint8_t ccitt_group3_2d_lens[11]
Definition: faxcompr.c:93
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static VLC ccitt_vlc[2]
Definition: faxcompr.c:97
static const uint8_t ccitt_codes_lens[2][CCITT_SYMS]
Definition: faxcompr.c:69
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
#define av_free(p)
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:693
#define VLC_TYPE
Definition: vlc.h:24
#define av_malloc_array(a, b)
#define FFSWAP(type, a, b)
Definition: common.h:99
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
CCITT Fax Group 3 and 4 decompression.
bitstream writer API