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->picture_ptr->format =
122  s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
123  for (i=s->palette_index; i<=maxtab; i++) {
124  uint8_t k = i << shift;
125  pal[k] = 0;
126  for (j=0; j<wt; j++) {
127  pal[k] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
128  }
129  }
130  s->palette_index = i;
131  }
132  break;
133  case 4:
134  avpriv_request_sample(s->avctx, "oversize image");
135  return AVERROR(ENOSYS);
136  default:
137  av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id);
138  return AVERROR_INVALIDDATA;
139  }
140  ff_dlog(s->avctx, "ID=%i, T=%i,%i,%i\n", id, s->t1, s->t2, s->t3);
141 
142  return 0;
143 }
144 
145 /**
146  * Get context-dependent Golomb code, decode it and update context
147  */
148 static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
149 {
150  int k, ret;
151 
152  for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
153  ;
154 
155 #ifdef JLS_BROKEN
156  if (!show_bits_long(gb, 32))
157  return -1;
158 #endif
159  ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
160 
161  /* decode mapped error */
162  if (ret & 1)
163  ret = -(ret + 1 >> 1);
164  else
165  ret >>= 1;
166 
167  /* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */
168  if (!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
169  ret = -(ret + 1);
170 
172 
173  return ret;
174 }
175 
176 /**
177  * Get Golomb code, decode it and update state for run termination
178  */
180  int RItype, int limit_add)
181 {
182  int k, ret, temp, map;
183  int Q = 365 + RItype;
184 
185  temp = state->A[Q];
186  if (RItype)
187  temp += state->N[Q] >> 1;
188 
189  for (k = 0; (state->N[Q] << k) < temp; k++)
190  ;
191 
192 #ifdef JLS_BROKEN
193  if (!show_bits_long(gb, 32))
194  return -1;
195 #endif
196  ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1,
197  state->qbpp);
198 
199  /* decode mapped error */
200  map = 0;
201  if (!k && (RItype || ret) && (2 * state->B[Q] < state->N[Q]))
202  map = 1;
203  ret += RItype + map;
204 
205  if (ret & 1) {
206  ret = map - (ret + 1 >> 1);
207  state->B[Q]++;
208  } else {
209  ret = ret >> 1;
210  }
211 
212  if(FFABS(ret) > 0xFFFF)
213  return -0x10000;
214  /* update state */
215  state->A[Q] += FFABS(ret) - RItype;
216  ret *= state->twonear;
218 
219  return ret;
220 }
221 
222 /**
223  * Decode one line of image
224  */
226  void *last, void *dst, int last2, int w,
227  int stride, int comp, int bits)
228 {
229  int i, x = 0;
230  int Ra, Rb, Rc, Rd;
231  int D0, D1, D2;
232 
233  while (x < w) {
234  int err, pred;
235 
236  if (get_bits_left(&s->gb) <= 0)
237  return AVERROR_INVALIDDATA;
238 
239  /* compute gradients */
240  Ra = x ? R(dst, x - stride) : R(last, x);
241  Rb = R(last, x);
242  Rc = x ? R(last, x - stride) : last2;
243  Rd = (x >= w - stride) ? R(last, x) : R(last, x + stride);
244  D0 = Rd - Rb;
245  D1 = Rb - Rc;
246  D2 = Rc - Ra;
247  /* run mode */
248  if ((FFABS(D0) <= state->near) &&
249  (FFABS(D1) <= state->near) &&
250  (FFABS(D2) <= state->near)) {
251  int r;
252  int RItype;
253 
254  /* decode full runs while available */
255  while (get_bits1(&s->gb)) {
256  int r;
257  r = 1 << ff_log2_run[state->run_index[comp]];
258  if (x + r * stride > w)
259  r = (w - x) / stride;
260  for (i = 0; i < r; i++) {
261  W(dst, x, Ra);
262  x += stride;
263  }
264  /* if EOL reached, we stop decoding */
265  if (r != 1 << ff_log2_run[state->run_index[comp]])
266  return 0;
267  if (state->run_index[comp] < 31)
268  state->run_index[comp]++;
269  if (x + stride > w)
270  return 0;
271  }
272  /* decode aborted run */
273  r = ff_log2_run[state->run_index[comp]];
274  if (r)
275  r = get_bits_long(&s->gb, r);
276  if (x + r * stride > w) {
277  r = (w - x) / stride;
278  }
279  for (i = 0; i < r; i++) {
280  W(dst, x, Ra);
281  x += stride;
282  }
283 
284  if (x >= w) {
285  av_log(NULL, AV_LOG_ERROR, "run overflow\n");
286  av_assert0(x <= w);
287  return AVERROR_INVALIDDATA;
288  }
289 
290  /* decode run termination value */
291  Rb = R(last, x);
292  RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
293  err = ls_get_code_runterm(&s->gb, state, RItype,
294  ff_log2_run[state->run_index[comp]]);
295  if (state->run_index[comp])
296  state->run_index[comp]--;
297 
298  if (state->near && RItype) {
299  pred = Ra + err;
300  } else {
301  if (Rb < Ra)
302  pred = Rb - err;
303  else
304  pred = Rb + err;
305  }
306  } else { /* regular mode */
307  int context, sign;
308 
309  context = ff_jpegls_quantize(state, D0) * 81 +
310  ff_jpegls_quantize(state, D1) * 9 +
312  pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
313 
314  if (context < 0) {
315  context = -context;
316  sign = 1;
317  } else {
318  sign = 0;
319  }
320 
321  if (sign) {
322  pred = av_clip(pred - state->C[context], 0, state->maxval);
323  err = -ls_get_code_regular(&s->gb, state, context);
324  } else {
325  pred = av_clip(pred + state->C[context], 0, state->maxval);
326  err = ls_get_code_regular(&s->gb, state, context);
327  }
328 
329  /* we have to do something more for near-lossless coding */
330  pred += err;
331  }
332  if (state->near) {
333  if (pred < -state->near)
334  pred += state->range * state->twonear;
335  else if (pred > state->maxval + state->near)
336  pred -= state->range * state->twonear;
337  pred = av_clip(pred, 0, state->maxval);
338  }
339 
340  pred &= state->maxval;
341  W(dst, x, pred);
342  x += stride;
343  }
344 
345  return 0;
346 }
347 
349  int point_transform, int ilv)
350 {
351  int i, t = 0;
352  uint8_t *zero, *last, *cur;
353  JLSState *state = s->jls_state;
354  int off = 0, stride = 1, width, shift, ret = 0;
355  int decoded_height = 0;
356 
357  if (!state) {
358  state = av_malloc(sizeof(*state));
359  if (!state)
360  return AVERROR(ENOMEM);
361  s->jls_state = state;
362  }
363  zero = av_mallocz(s->picture_ptr->linesize[0]);
364  if (!zero)
365  return AVERROR(ENOMEM);
366  last = zero;
367  cur = s->picture_ptr->data[0];
368 
369  /* initialize JPEG-LS state from JPEG parameters */
370  memset(state, 0, sizeof(*state));
371  state->near = near;
372  state->bpp = (s->bits < 2) ? 2 : s->bits;
373  state->maxval = s->maxval;
374  state->T1 = s->t1;
375  state->T2 = s->t2;
376  state->T3 = s->t3;
377  state->reset = s->reset;
380 
381  if (s->bits <= 8)
382  shift = point_transform + (8 - s->bits);
383  else
384  shift = point_transform + (16 - s->bits);
385 
386  if (shift >= 16) {
388  goto end;
389  }
390 
391  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
392  av_log(s->avctx, AV_LOG_DEBUG,
393  "JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) "
394  "RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n",
395  s->width, s->height, state->near, state->maxval,
396  state->T1, state->T2, state->T3,
397  state->reset, state->limit, state->qbpp, state->range);
398  av_log(s->avctx, AV_LOG_DEBUG, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n",
399  ilv, point_transform, s->bits, s->cur_scan);
400  }
401  if (get_bits_left(&s->gb) < s->height) {
403  goto end;
404  }
405  if (ilv == 0) { /* separate planes */
406  if (s->cur_scan > s->nb_components) {
408  goto end;
409  }
410  stride = (s->nb_components > 1) ? 3 : 1;
411  off = av_clip(s->cur_scan - 1, 0, stride - 1);
412  width = s->width * stride;
413  cur += off;
414  for (i = 0; i < s->height; i++) {
415  int ret;
416  if (s->bits <= 8) {
417  ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 8);
418  t = last[0];
419  } else {
420  ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 16);
421  t = *((uint16_t *)last);
422  }
423  if (ret < 0)
424  break;
425  last = cur;
426  cur += s->picture_ptr->linesize[0];
427 
428  if (s->restart_interval && !--s->restart_count) {
429  align_get_bits(&s->gb);
430  skip_bits(&s->gb, 16); /* skip RSTn */
431  }
432  }
433  decoded_height = i;
434  } else if (ilv == 1) { /* line interleaving */
435  int j;
436  int Rc[3] = { 0, 0, 0 };
437  stride = (s->nb_components > 1) ? 3 : 1;
438  memset(cur, 0, s->picture_ptr->linesize[0]);
439  width = s->width * stride;
440  for (i = 0; i < s->height; i++) {
441  int ret;
442  for (j = 0; j < stride; j++) {
443  ret = ls_decode_line(state, s, last + j, cur + j,
444  Rc[j], width, stride, j, 8);
445  if (ret < 0)
446  break;
447  Rc[j] = last[j];
448 
449  if (s->restart_interval && !--s->restart_count) {
450  align_get_bits(&s->gb);
451  skip_bits(&s->gb, 16); /* skip RSTn */
452  }
453  }
454  if (ret < 0)
455  break;
456  last = cur;
457  cur += s->picture_ptr->linesize[0];
458  }
459  decoded_height = i;
460  } else if (ilv == 2) { /* sample interleaving */
461  avpriv_report_missing_feature(s->avctx, "Sample interleaved images");
463  goto end;
464  } else { /* unknown interleaving */
465  avpriv_report_missing_feature(s->avctx, "Unknown interleaved images");
467  goto end;
468  }
469 
470  if (s->xfrm && s->nb_components == 3) {
471  int x, w;
472 
473  w = s->width * s->nb_components;
474 
475  if (s->bits <= 8) {
476  uint8_t *src = s->picture_ptr->data[0];
477 
478  for (i = 0; i < s->height; i++) {
479  switch(s->xfrm) {
480  case 1:
481  for (x = off; x < w; x += 3) {
482  src[x ] += src[x+1] + 128;
483  src[x+2] += src[x+1] + 128;
484  }
485  break;
486  case 2:
487  for (x = off; x < w; x += 3) {
488  src[x ] += src[x+1] + 128;
489  src[x+2] += ((src[x ] + src[x+1])>>1) + 128;
490  }
491  break;
492  case 3:
493  for (x = off; x < w; x += 3) {
494  int g = src[x+0] - ((src[x+2]+src[x+1])>>2) + 64;
495  src[x+0] = src[x+2] + g + 128;
496  src[x+2] = src[x+1] + g + 128;
497  src[x+1] = g;
498  }
499  break;
500  case 4:
501  for (x = off; x < w; x += 3) {
502  int r = src[x+0] - (( 359 * (src[x+2]-128) + 490) >> 8);
503  int g = src[x+0] - (( 88 * (src[x+1]-128) - 183 * (src[x+2]-128) + 30) >> 8);
504  int b = src[x+0] + ((454 * (src[x+1]-128) + 574) >> 8);
505  src[x+0] = av_clip_uint8(r);
506  src[x+1] = av_clip_uint8(g);
507  src[x+2] = av_clip_uint8(b);
508  }
509  break;
510  }
511  src += s->picture_ptr->linesize[0];
512  }
513  }else
514  avpriv_report_missing_feature(s->avctx, "16bit xfrm");
515  }
516 
517  if (shift) { /* we need to do point transform or normalize samples */
518  int x, w;
519 
520  w = s->width * s->nb_components;
521 
522  if (s->bits <= 8) {
523  uint8_t *src = s->picture_ptr->data[0];
524 
525  for (i = 0; i < decoded_height; i++) {
526  for (x = off; x < w; x += stride)
527  src[x] <<= shift;
528  src += s->picture_ptr->linesize[0];
529  }
530  } else {
531  uint16_t *src = (uint16_t *)s->picture_ptr->data[0];
532 
533  for (i = 0; i < decoded_height; i++) {
534  for (x = 0; x < w; x++)
535  src[x] <<= shift;
536  src += s->picture_ptr->linesize[0] / 2;
537  }
538  }
539  }
540 
541 end:
542  av_free(zero);
543 
544  return ret;
545 }
546 
548  .name = "jpegls",
549  .long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
550  .type = AVMEDIA_TYPE_VIDEO,
551  .id = AV_CODEC_ID_JPEGLS,
552  .priv_data_size = sizeof(MJpegDecodeContext),
554  .close = ff_mjpeg_decode_end,
556  .capabilities = AV_CODEC_CAP_DR1,
559 };
AVCodec
AVCodec.
Definition: codec.h:197
stride
int stride
Definition: mace.c:144
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
FF_CODEC_CAP_SETS_PKT_DTS
#define FF_CODEC_CAP_SETS_PKT_DTS
Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set AVFrame.pkt_dts manually.
Definition: internal.h:56
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@ W
Definition: vf_addroi.c:26
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#define av_clip
Definition: common.h:122
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static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
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static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
Definition: get_bits.h:602
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static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
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const char * r
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AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
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static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:85
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static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
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static struct @321 state
mjpegdec.h
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uint8_t w
Definition: llviddspenc.c:39
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#define R
Definition: huffyuvdsp.h:34
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#define b
Definition: input.c:41
jpeglsdec.h
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static int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
Get context-dependent Golomb code, decode it and update context.
Definition: jpeglsdec.c:148
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#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1624
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#define av_malloc(s)
Definition: tableprint_vlc.h:31
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static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
golomb.h
exp golomb vlc stuff
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static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
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av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
Definition: mjpegdec.c:117
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Definition: get_bits.h:61
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Definition: jpegls.h:37
jpegls.h
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#define AV_LOG_ERROR
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Definition: log.h:194
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static int get_ur_golomb_jpegls(GetBitContext *gb, int k, int limit, int esc_len)
read unsigned golomb rice code (jpegls).
Definition: golomb.h:430
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#define width
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Definition: cbs_vp9.c:257
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const char * g
Definition: vf_curves.c:117
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Definition: jpeglsdec.c:348
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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:215
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:225
get_bits.h
ff_mjpeg_decode_end
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
Definition: mjpegdec.c:2882
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
if
if(ret)
Definition: filter_design.txt:179
ff_mjpeg_receive_frame
int ff_mjpeg_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: mjpegdec.c:2389
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:85
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
ff_log2_run
const uint8_t ff_log2_run[41]
Definition: bitstream.c:39
receive_frame
static CopyRet receive_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
Definition: crystalhd.c:560
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
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
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:53
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
i
int i
Definition: input.c:407
ff_jpegls_init_state
void ff_jpegls_init_state(JLSState *state)
Calculate initial JPEG-LS parameters.
Definition: jpegls.c:31
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:49
ff_jpegls_update_state_regular
static int ff_jpegls_update_state_regular(JLSState *state, int Q, int err)
Definition: jpegls.h:95
uint8_t
uint8_t
Definition: audio_convert.c:194
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:237
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
len
int len
Definition: vorbis_enc_data.h:452
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:179
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:693
ff_jpegls_reset_coding_parameters
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all)
Calculate JPEG-LS codec values.
Definition: jpegls.c:62
AV_CODEC_ID_JPEGLS
@ AV_CODEC_ID_JPEGLS
Definition: codec_id.h:60
temp
else temp
Definition: vf_mcdeint.c:259
av_clip_uint8
#define av_clip_uint8
Definition: common.h:128
shift
static int shift(int a, int b)
Definition: sonic.c:82
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:39
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:59
ff_jpegls_decoder
AVCodec ff_jpegls_decoder
Definition: jpeglsdec.c:547