FFmpeg
jpeglsdec.c
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1 /*
2  * JPEG-LS decoder
3  * Copyright (c) 2003 Michael Niedermayer
4  * Copyright (c) 2006 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 /**
24  * @file
25  * JPEG-LS decoder.
26  */
27 
28 #include "avcodec.h"
29 #include "get_bits.h"
30 #include "golomb.h"
31 #include "internal.h"
32 #include "mathops.h"
33 #include "mjpeg.h"
34 #include "mjpegdec.h"
35 #include "jpegls.h"
36 #include "jpeglsdec.h"
37 
38 /*
39  * Uncomment this to significantly speed up decoding of broken JPEG-LS
40  * (or test broken JPEG-LS decoder) and slow down ordinary decoding a bit.
41  *
42  * There is no Golomb code with length >= 32 bits possible, so check and
43  * avoid situation of 32 zeros, FFmpeg Golomb decoder is painfully slow
44  * on this errors.
45  */
46 //#define JLS_BROKEN
47 
48 /**
49  * Decode LSE block with initialization parameters
50  */
52 {
53  int id;
54  int tid, wt, maxtab, i, j;
55 
56  int len = get_bits(&s->gb, 16);
57  id = get_bits(&s->gb, 8);
58 
59  switch (id) {
60  case 1:
61  if (len < 13)
62  return AVERROR_INVALIDDATA;
63 
64  s->maxval = get_bits(&s->gb, 16);
65  s->t1 = get_bits(&s->gb, 16);
66  s->t2 = get_bits(&s->gb, 16);
67  s->t3 = get_bits(&s->gb, 16);
68  s->reset = get_bits(&s->gb, 16);
69 
70  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
71  av_log(s->avctx, AV_LOG_DEBUG, "Coding parameters maxval:%d T1:%d T2:%d T3:%d reset:%d\n",
72  s->maxval, s->t1, s->t2, s->t3, s->reset);
73  }
74 
75 // ff_jpegls_reset_coding_parameters(s, 0);
76  //FIXME quant table?
77  break;
78  case 2:
79  s->palette_index = 0;
80  case 3:
81  tid= get_bits(&s->gb, 8);
82  wt = get_bits(&s->gb, 8);
83 
84  if (len < 5)
85  return AVERROR_INVALIDDATA;
86 
87  if (wt < 1 || wt > MAX_COMPONENTS) {
88  avpriv_request_sample(s->avctx, "wt %d", wt);
89  return AVERROR_PATCHWELCOME;
90  }
91 
92  if (!s->maxval)
93  maxtab = 255;
94  else if ((5 + wt*(s->maxval+1)) < 65535)
95  maxtab = s->maxval;
96  else
97  maxtab = 65530/wt - 1;
98 
99  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
100  av_log(s->avctx, AV_LOG_DEBUG, "LSE palette %d tid:%d wt:%d maxtab:%d\n", id, tid, wt, maxtab);
101  }
102  if (maxtab >= 256) {
103  avpriv_request_sample(s->avctx, ">8bit palette");
104  return AVERROR_PATCHWELCOME;
105  }
106  maxtab = FFMIN(maxtab, (len - 5) / wt + s->palette_index);
107 
108  if (s->palette_index > maxtab)
109  return AVERROR_INVALIDDATA;
110 
111  if ((s->avctx->pix_fmt == AV_PIX_FMT_GRAY8 || s->avctx->pix_fmt == AV_PIX_FMT_PAL8) &&
112  (s->picture_ptr->format == AV_PIX_FMT_GRAY8 || s->picture_ptr->format == AV_PIX_FMT_PAL8)) {
113  uint32_t *pal = (uint32_t *)s->picture_ptr->data[1];
114  int shift = 0;
115 
116  if (s->avctx->bits_per_raw_sample > 0 && s->avctx->bits_per_raw_sample < 8) {
117  maxtab = FFMIN(maxtab, (1<<s->avctx->bits_per_raw_sample)-1);
118  shift = 8 - s->avctx->bits_per_raw_sample;
119  }
120 
121  s->force_pal8++;
122  if (!pal) {
123  if (s->force_pal8 > 1)
124  return AVERROR_INVALIDDATA;
125  return 1;
126  }
127 
128  for (i=s->palette_index; i<=maxtab; i++) {
129  uint8_t k = i << shift;
130  pal[k] = wt < 4 ? 0xFF000000 : 0;
131  for (j=0; j<wt; j++) {
132  pal[k] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
133  }
134  }
135  s->palette_index = i;
136  }
137  break;
138  case 4:
139  avpriv_request_sample(s->avctx, "oversize image");
140  return AVERROR(ENOSYS);
141  default:
142  av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id);
143  return AVERROR_INVALIDDATA;
144  }
145  ff_dlog(s->avctx, "ID=%i, T=%i,%i,%i\n", id, s->t1, s->t2, s->t3);
146 
147  return 0;
148 }
149 
150 /**
151  * Get context-dependent Golomb code, decode it and update context
152  */
153 static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
154 {
155  int k, ret;
156 
157  for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
158  ;
159 
160 #ifdef JLS_BROKEN
161  if (!show_bits_long(gb, 32))
162  return -1;
163 #endif
164  ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
165 
166  /* decode mapped error */
167  if (ret & 1)
168  ret = -(ret + 1 >> 1);
169  else
170  ret >>= 1;
171 
172  /* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */
173  if (!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
174  ret = -(ret + 1);
175 
177 
178  return ret;
179 }
180 
181 /**
182  * Get Golomb code, decode it and update state for run termination
183  */
185  int RItype, int limit_add)
186 {
187  int k, ret, temp, map;
188  int Q = 365 + RItype;
189 
190  temp = state->A[Q];
191  if (RItype)
192  temp += state->N[Q] >> 1;
193 
194  for (k = 0; ((unsigned)state->N[Q] << k) < temp; k++)
195  ;
196 
197 #ifdef JLS_BROKEN
198  if (!show_bits_long(gb, 32))
199  return -1;
200 #endif
201  ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1,
202  state->qbpp);
203  if (ret < 0)
204  return -0x10000;
205 
206  /* decode mapped error */
207  map = 0;
208  if (!k && (RItype || ret) && (2 * state->B[Q] < state->N[Q]))
209  map = 1;
210  ret += RItype + map;
211 
212  if (ret & 1) {
213  ret = map - (ret + 1 >> 1);
214  state->B[Q]++;
215  } else {
216  ret = ret >> 1;
217  }
218 
219  if (FFABS(ret) > 0xFFFF)
220  return -0x10000;
221  /* update state */
222  state->A[Q] += FFABS(ret) - RItype;
223  ret *= state->twonear;
225 
226  return ret;
227 }
228 
229 /**
230  * Decode one line of image
231  */
233  void *last, void *dst, int last2, int w,
234  int stride, int comp, int bits)
235 {
236  int i, x = 0;
237  int Ra, Rb, Rc, Rd;
238  int D0, D1, D2;
239 
240  while (x < w) {
241  int err, pred;
242 
243  if (get_bits_left(&s->gb) <= 0)
244  return AVERROR_INVALIDDATA;
245 
246  /* compute gradients */
247  Ra = x ? R(dst, x - stride) : R(last, x);
248  Rb = R(last, x);
249  Rc = x ? R(last, x - stride) : last2;
250  Rd = (x >= w - stride) ? R(last, x) : R(last, x + stride);
251  D0 = Rd - Rb;
252  D1 = Rb - Rc;
253  D2 = Rc - Ra;
254  /* run mode */
255  if ((FFABS(D0) <= state->near) &&
256  (FFABS(D1) <= state->near) &&
257  (FFABS(D2) <= state->near)) {
258  int r;
259  int RItype;
260 
261  /* decode full runs while available */
262  while (get_bits1(&s->gb)) {
263  int r;
264  r = 1 << ff_log2_run[state->run_index[comp]];
265  if (x + r * stride > w)
266  r = (w - x) / stride;
267  for (i = 0; i < r; i++) {
268  W(dst, x, Ra);
269  x += stride;
270  }
271  /* if EOL reached, we stop decoding */
272  if (r != 1 << ff_log2_run[state->run_index[comp]])
273  return 0;
274  if (state->run_index[comp] < 31)
275  state->run_index[comp]++;
276  if (x + stride > w)
277  return 0;
278  }
279  /* decode aborted run */
280  r = ff_log2_run[state->run_index[comp]];
281  if (r)
282  r = get_bits_long(&s->gb, r);
283  if (x + r * stride > w) {
284  r = (w - x) / stride;
285  }
286  for (i = 0; i < r; i++) {
287  W(dst, x, Ra);
288  x += stride;
289  }
290 
291  if (x >= w) {
292  av_log(NULL, AV_LOG_ERROR, "run overflow\n");
293  av_assert0(x <= w);
294  return AVERROR_INVALIDDATA;
295  }
296 
297  /* decode run termination value */
298  Rb = R(last, x);
299  RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
300  err = ls_get_code_runterm(&s->gb, state, RItype,
301  ff_log2_run[state->run_index[comp]]);
302  if (state->run_index[comp])
303  state->run_index[comp]--;
304 
305  if (state->near && RItype) {
306  pred = Ra + err;
307  } else {
308  if (Rb < Ra)
309  pred = Rb - err;
310  else
311  pred = Rb + err;
312  }
313  } else { /* regular mode */
314  int context, sign;
315 
316  context = ff_jpegls_quantize(state, D0) * 81 +
317  ff_jpegls_quantize(state, D1) * 9 +
319  pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
320 
321  if (context < 0) {
322  context = -context;
323  sign = 1;
324  } else {
325  sign = 0;
326  }
327 
328  if (sign) {
329  pred = av_clip(pred - state->C[context], 0, state->maxval);
330  err = -ls_get_code_regular(&s->gb, state, context);
331  } else {
332  pred = av_clip(pred + state->C[context], 0, state->maxval);
333  err = ls_get_code_regular(&s->gb, state, context);
334  }
335 
336  /* we have to do something more for near-lossless coding */
337  pred += err;
338  }
339  if (state->near) {
340  if (pred < -state->near)
341  pred += state->range * state->twonear;
342  else if (pred > state->maxval + state->near)
343  pred -= state->range * state->twonear;
344  pred = av_clip(pred, 0, state->maxval);
345  }
346 
347  pred &= state->maxval;
348  W(dst, x, pred);
349  x += stride;
350  }
351 
352  return 0;
353 }
354 
356  int point_transform, int ilv)
357 {
358  int i, t = 0;
359  uint8_t *zero, *last, *cur;
360  JLSState *state = s->jls_state;
361  int off = 0, stride = 1, width, shift, ret = 0;
362  int decoded_height = 0;
363 
364  if (!state) {
365  state = av_malloc(sizeof(*state));
366  if (!state)
367  return AVERROR(ENOMEM);
368  s->jls_state = state;
369  }
370  zero = av_mallocz(s->picture_ptr->linesize[0]);
371  if (!zero)
372  return AVERROR(ENOMEM);
373  last = zero;
374  cur = s->picture_ptr->data[0];
375 
376  /* initialize JPEG-LS state from JPEG parameters */
377  memset(state, 0, sizeof(*state));
378  state->near = near;
379  state->bpp = (s->bits < 2) ? 2 : s->bits;
380  state->maxval = s->maxval;
381  state->T1 = s->t1;
382  state->T2 = s->t2;
383  state->T3 = s->t3;
384  state->reset = s->reset;
387 
388  if (s->bits <= 8)
389  shift = point_transform + (8 - s->bits);
390  else
391  shift = point_transform + (16 - s->bits);
392 
393  if (shift >= 16) {
395  goto end;
396  }
397 
398  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
399  av_log(s->avctx, AV_LOG_DEBUG,
400  "JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) "
401  "RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n",
402  s->width, s->height, state->near, state->maxval,
403  state->T1, state->T2, state->T3,
404  state->reset, state->limit, state->qbpp, state->range);
405  av_log(s->avctx, AV_LOG_DEBUG, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n",
406  ilv, point_transform, s->bits, s->cur_scan);
407  }
408  if (get_bits_left(&s->gb) < s->height) {
410  goto end;
411  }
412  if (ilv == 0) { /* separate planes */
413  if (s->cur_scan > s->nb_components) {
415  goto end;
416  }
417  stride = (s->nb_components > 1) ? 3 : 1;
418  off = av_clip(s->cur_scan - 1, 0, stride - 1);
419  width = s->width * stride;
420  cur += off;
421  for (i = 0; i < s->height; i++) {
422  int ret;
423  if (s->bits <= 8) {
424  ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 8);
425  t = last[0];
426  } else {
427  ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 16);
428  t = *((uint16_t *)last);
429  }
430  if (ret < 0)
431  break;
432  last = cur;
433  cur += s->picture_ptr->linesize[0];
434 
435  if (s->restart_interval && !--s->restart_count) {
436  align_get_bits(&s->gb);
437  skip_bits(&s->gb, 16); /* skip RSTn */
438  }
439  }
440  decoded_height = i;
441  } else if (ilv == 1) { /* line interleaving */
442  int j;
443  int Rc[3] = { 0, 0, 0 };
444  stride = (s->nb_components > 1) ? 3 : 1;
445  memset(cur, 0, s->picture_ptr->linesize[0]);
446  width = s->width * stride;
447  for (i = 0; i < s->height; i++) {
448  int ret;
449  for (j = 0; j < stride; j++) {
450  ret = ls_decode_line(state, s, last + j, cur + j,
451  Rc[j], width, stride, j, 8);
452  if (ret < 0)
453  break;
454  Rc[j] = last[j];
455 
456  if (s->restart_interval && !--s->restart_count) {
457  align_get_bits(&s->gb);
458  skip_bits(&s->gb, 16); /* skip RSTn */
459  }
460  }
461  if (ret < 0)
462  break;
463  last = cur;
464  cur += s->picture_ptr->linesize[0];
465  }
466  decoded_height = i;
467  } else if (ilv == 2) { /* sample interleaving */
468  avpriv_report_missing_feature(s->avctx, "Sample interleaved images");
470  goto end;
471  } else { /* unknown interleaving */
472  avpriv_report_missing_feature(s->avctx, "Unknown interleaved images");
474  goto end;
475  }
476 
477  if (s->xfrm && s->nb_components == 3) {
478  int x, w;
479 
480  w = s->width * s->nb_components;
481 
482  if (s->bits <= 8) {
483  uint8_t *src = s->picture_ptr->data[0];
484 
485  for (i = 0; i < s->height; i++) {
486  switch(s->xfrm) {
487  case 1:
488  for (x = off; x < w; x += 3) {
489  src[x ] += src[x+1] + 128;
490  src[x+2] += src[x+1] + 128;
491  }
492  break;
493  case 2:
494  for (x = off; x < w; x += 3) {
495  src[x ] += src[x+1] + 128;
496  src[x+2] += ((src[x ] + src[x+1])>>1) + 128;
497  }
498  break;
499  case 3:
500  for (x = off; x < w; x += 3) {
501  int g = src[x+0] - ((src[x+2]+src[x+1])>>2) + 64;
502  src[x+0] = src[x+2] + g + 128;
503  src[x+2] = src[x+1] + g + 128;
504  src[x+1] = g;
505  }
506  break;
507  case 4:
508  for (x = off; x < w; x += 3) {
509  int r = src[x+0] - (( 359 * (src[x+2]-128) + 490) >> 8);
510  int g = src[x+0] - (( 88 * (src[x+1]-128) - 183 * (src[x+2]-128) + 30) >> 8);
511  int b = src[x+0] + ((454 * (src[x+1]-128) + 574) >> 8);
512  src[x+0] = av_clip_uint8(r);
513  src[x+1] = av_clip_uint8(g);
514  src[x+2] = av_clip_uint8(b);
515  }
516  break;
517  }
518  src += s->picture_ptr->linesize[0];
519  }
520  }else
521  avpriv_report_missing_feature(s->avctx, "16bit xfrm");
522  }
523 
524  if (shift) { /* we need to do point transform or normalize samples */
525  int x, w;
526 
527  w = s->width * s->nb_components;
528 
529  if (s->bits <= 8) {
530  uint8_t *src = s->picture_ptr->data[0];
531 
532  for (i = 0; i < decoded_height; i++) {
533  for (x = off; x < w; x += stride)
534  src[x] <<= shift;
535  src += s->picture_ptr->linesize[0];
536  }
537  } else {
538  uint16_t *src = (uint16_t *)s->picture_ptr->data[0];
539 
540  for (i = 0; i < decoded_height; i++) {
541  for (x = 0; x < w; x++)
542  src[x] <<= shift;
543  src += s->picture_ptr->linesize[0] / 2;
544  }
545  }
546  }
547 
548 end:
549  av_free(zero);
550 
551  return ret;
552 }
553 
555  .name = "jpegls",
556  .long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
557  .type = AVMEDIA_TYPE_VIDEO,
558  .id = AV_CODEC_ID_JPEGLS,
559  .priv_data_size = sizeof(MJpegDecodeContext),
561  .close = ff_mjpeg_decode_end,
563  .capabilities = AV_CODEC_CAP_DR1,
566 };
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Definition: get_bits.h:547
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Definition: jpeglsdec.c:153
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Definition: jpeglsdec.c:554
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Definition: get_bits.h:468
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static unsigned int get_bits(GetBitContext *s, int n)
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#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ls_decode_line
static int ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *last, void *dst, int last2, int w, int stride, int comp, int bits)
Decode one line of image.
Definition: jpeglsdec.c:232
get_bits.h
ff_mjpeg_decode_end
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
Definition: mjpegdec.c:2946
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:65
if
if(ret)
Definition: filter_design.txt:179
ff_mjpeg_receive_frame
int ff_mjpeg_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: mjpegdec.c:2397
context
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your context
Definition: writing_filters.txt:91
ff_jpegls_downscale_state
static void ff_jpegls_downscale_state(JLSState *state, int Q)
Definition: jpegls.h:84
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
ff_log2_run
const uint8_t ff_log2_run[41]
Definition: bitstream.c:50
receive_frame
static CopyRet receive_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
Definition: crystalhd.c:559
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
src
#define src
Definition: vp8dsp.c:255
mathops.h
MJpegDecodeContext
Definition: mjpegdec.h:54
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
state
static struct @320 state
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
id
enum AVCodecID id
Definition: extract_extradata_bsf.c:325
ff_jpegls_decode_lse
int ff_jpegls_decode_lse(MJpegDecodeContext *s)
Decode LSE block with initialization parameters.
Definition: jpeglsdec.c:51
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
ff_jpegls_quantize
static int ff_jpegls_quantize(JLSState *s, int v)
Calculate quantized gradient value, used for context determination.
Definition: jpegls.h:52
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
ff_jpegls_init_state
void ff_jpegls_init_state(JLSState *state)
Calculate initial JPEG-LS parameters.
Definition: jpegls.c:33
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:50
ff_jpegls_update_state_regular
static int ff_jpegls_update_state_regular(JLSState *state, int Q, int err)
Definition: jpegls.h:94
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:263
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
len
int len
Definition: vorbis_enc_data.h:426
avcodec.h
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
mid_pred
#define mid_pred
Definition: mathops.h:97
ret
ret
Definition: filter_design.txt:187
pred
static const float pred[4]
Definition: siprdata.h:259
ls_get_code_runterm
static int ls_get_code_runterm(GetBitContext *gb, JLSState *state, int RItype, int limit_add)
Get Golomb code, decode it and update state for run termination.
Definition: jpeglsdec.c:184
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:694
ff_jpegls_reset_coding_parameters
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all)
Calculate JPEG-LS codec values.
Definition: jpegls.c:64
AV_CODEC_ID_JPEGLS
@ AV_CODEC_ID_JPEGLS
Definition: codec_id.h:61
temp
else temp
Definition: vf_mcdeint.c:248
av_clip_uint8
#define av_clip_uint8
Definition: common.h:102
shift
static int shift(int a, int b)
Definition: sonic.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
zero
#define zero
Definition: regdef.h:64
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
map
const VDPAUPixFmtMap * map
Definition: hwcontext_vdpau.c:71
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
MAX_COMPONENTS
#define MAX_COMPONENTS
Definition: mjpegdec.h:45
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61