FFmpeg  1.2.12
mjpegdec.c
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1 /*
2  * MJPEG decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  * Copyright (c) 2003-2004 Michael Niedermayer
6  *
7  * Support for external huffman table, various fixes (AVID workaround),
8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
9  * by Alex Beregszaszi
10  *
11  * This file is part of FFmpeg.
12  *
13  * FFmpeg is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * FFmpeg is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with FFmpeg; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  */
27 
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
36 #include "avcodec.h"
37 #include "copy_block.h"
38 #include "internal.h"
39 #include "mjpeg.h"
40 #include "mjpegdec.h"
41 #include "jpeglsdec.h"
42 
43 
44 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
45  const uint8_t *val_table, int nb_codes,
46  int use_static, int is_ac)
47 {
48  uint8_t huff_size[256] = { 0 };
49  uint16_t huff_code[256];
50  uint16_t huff_sym[256];
51  int i;
52 
53  av_assert0(nb_codes <= 256);
54 
55  ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
56 
57  for (i = 0; i < 256; i++)
58  huff_sym[i] = i + 16 * is_ac;
59 
60  if (is_ac)
61  huff_sym[0] = 16 * 256;
62 
63  return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
64  huff_code, 2, 2, huff_sym, 2, 2, use_static);
65 }
66 
68 {
70  avpriv_mjpeg_val_dc, 12, 0, 0);
72  avpriv_mjpeg_val_dc, 12, 0, 0);
81 }
82 
84 {
85  MJpegDecodeContext *s = avctx->priv_data;
86 
87  if (!s->picture_ptr)
88  s->picture_ptr = &s->picture;
90 
91  s->avctx = avctx;
92  ff_dsputil_init(&s->dsp, avctx);
94  s->buffer_size = 0;
95  s->buffer = NULL;
96  s->start_code = -1;
97  s->first_picture = 1;
98  s->got_picture = 0;
99  s->org_height = avctx->coded_height;
101 
103 
104  if (s->extern_huff) {
105  av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
106  init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
107  if (ff_mjpeg_decode_dht(s)) {
108  av_log(avctx, AV_LOG_ERROR,
109  "error using external huffman table, switching back to internal\n");
111  }
112  }
113  if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
114  s->interlace_polarity = 1; /* bottom field first */
115  av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
116  }
117  if (avctx->codec->id == AV_CODEC_ID_AMV)
118  s->flipped = 1;
119 
120  return 0;
121 }
122 
123 
124 /* quantize tables */
126 {
127  int len, index, i, j;
128 
129  len = get_bits(&s->gb, 16) - 2;
130 
131  while (len >= 65) {
132  int pr = get_bits(&s->gb, 4);
133  if (pr > 1) {
134  av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
135  return AVERROR_INVALIDDATA;
136  }
137  index = get_bits(&s->gb, 4);
138  if (index >= 4)
139  return -1;
140  av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
141  /* read quant table */
142  for (i = 0; i < 64; i++) {
143  j = s->scantable.permutated[i];
144  s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
145  }
146 
147  // XXX FIXME finetune, and perhaps add dc too
148  s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
149  s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
150  av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
151  index, s->qscale[index]);
152  len -= 65;
153  }
154  return 0;
155 }
156 
157 /* decode huffman tables and build VLC decoders */
159 {
160  int len, index, i, class, n, v, code_max;
161  uint8_t bits_table[17];
162  uint8_t val_table[256];
163  int ret = 0;
164 
165  len = get_bits(&s->gb, 16) - 2;
166 
167  while (len > 0) {
168  if (len < 17)
169  return AVERROR_INVALIDDATA;
170  class = get_bits(&s->gb, 4);
171  if (class >= 2)
172  return AVERROR_INVALIDDATA;
173  index = get_bits(&s->gb, 4);
174  if (index >= 4)
175  return AVERROR_INVALIDDATA;
176  n = 0;
177  for (i = 1; i <= 16; i++) {
178  bits_table[i] = get_bits(&s->gb, 8);
179  n += bits_table[i];
180  }
181  len -= 17;
182  if (len < n || n > 256)
183  return AVERROR_INVALIDDATA;
184 
185  code_max = 0;
186  for (i = 0; i < n; i++) {
187  v = get_bits(&s->gb, 8);
188  if (v > code_max)
189  code_max = v;
190  val_table[i] = v;
191  }
192  len -= n;
193 
194  /* build VLC and flush previous vlc if present */
195  ff_free_vlc(&s->vlcs[class][index]);
196  av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
197  class, index, code_max + 1);
198  if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
199  code_max + 1, 0, class > 0)) < 0)
200  return ret;
201 
202  if (class > 0) {
203  ff_free_vlc(&s->vlcs[2][index]);
204  if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
205  code_max + 1, 0, 0)) < 0)
206  return ret;
207  }
208  }
209  return 0;
210 }
211 
213 {
214  int len, nb_components, i, width, height, bits, pix_fmt_id;
215  int h_count[MAX_COMPONENTS];
216  int v_count[MAX_COMPONENTS];
217 
218  s->cur_scan = 0;
219  s->upscale_h = s->upscale_v = 0;
220 
221  /* XXX: verify len field validity */
222  len = get_bits(&s->gb, 16);
223  bits = get_bits(&s->gb, 8);
224 
225  if (s->pegasus_rct)
226  bits = 9;
227  if (bits == 9 && !s->pegasus_rct)
228  s->rct = 1; // FIXME ugly
229 
230  if (bits != 8 && !s->lossless) {
231  av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
232  return -1;
233  }
234 
235  if(s->lossless && s->avctx->lowres){
236  av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
237  return -1;
238  }
239 
240  height = get_bits(&s->gb, 16);
241  width = get_bits(&s->gb, 16);
242 
243  // HACK for odd_height.mov
244  if (s->interlaced && s->width == width && s->height == height + 1)
245  height= s->height;
246 
247  av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
248  if (av_image_check_size(width, height, 0, s->avctx))
249  return AVERROR_INVALIDDATA;
250 
251  nb_components = get_bits(&s->gb, 8);
252  if (nb_components <= 0 ||
253  nb_components > MAX_COMPONENTS)
254  return -1;
255  if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
256  if (nb_components != s->nb_components) {
257  av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
258  return AVERROR_INVALIDDATA;
259  }
260  }
261  if (s->ls && !(bits <= 8 || nb_components == 1)) {
263  "For JPEG-LS anything except <= 8 bits/component"
264  " or 16-bit gray", 0);
265  return AVERROR_PATCHWELCOME;
266  }
267  s->nb_components = nb_components;
268  s->h_max = 1;
269  s->v_max = 1;
270  memset(h_count, 0, sizeof(h_count));
271  memset(v_count, 0, sizeof(v_count));
272  for (i = 0; i < nb_components; i++) {
273  /* component id */
274  s->component_id[i] = get_bits(&s->gb, 8) - 1;
275  h_count[i] = get_bits(&s->gb, 4);
276  v_count[i] = get_bits(&s->gb, 4);
277  /* compute hmax and vmax (only used in interleaved case) */
278  if (h_count[i] > s->h_max)
279  s->h_max = h_count[i];
280  if (v_count[i] > s->v_max)
281  s->v_max = v_count[i];
282  if (!h_count[i] || !v_count[i]) {
283  av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n");
284  return -1;
285  }
286  s->quant_index[i] = get_bits(&s->gb, 8);
287  if (s->quant_index[i] >= 4) {
288  av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
289  return AVERROR_INVALIDDATA;
290  }
291  av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
292  i, h_count[i], v_count[i],
293  s->component_id[i], s->quant_index[i]);
294  }
295 
296  if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
297  av_log_missing_feature(s->avctx, "Subsampling in JPEG-LS", 0);
298  return AVERROR_PATCHWELCOME;
299  }
300 
301 
302  /* if different size, realloc/alloc picture */
303  if ( width != s->width || height != s->height
304  || bits != s->bits
305  || memcmp(s->h_count, h_count, sizeof(h_count))
306  || memcmp(s->v_count, v_count, sizeof(v_count))) {
307  av_freep(&s->qscale_table);
308 
309  s->width = width;
310  s->height = height;
311  s->bits = bits;
312  memcpy(s->h_count, h_count, sizeof(h_count));
313  memcpy(s->v_count, v_count, sizeof(v_count));
314  s->interlaced = 0;
315  s->got_picture = 0;
316 
317  /* test interlaced mode */
318  if (s->first_picture &&
319  s->org_height != 0 &&
320  s->height < ((s->org_height * 3) / 4)) {
321  s->interlaced = 1;
325  height *= 2;
326  }
327 
328  avcodec_set_dimensions(s->avctx, width, height);
329 
330  s->qscale_table = av_mallocz((s->width + 15) / 16);
331  s->first_picture = 0;
332  }
333 
334  if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
335  if (s->progressive) {
336  av_log_ask_for_sample(s->avctx, "progressively coded interlaced pictures not supported\n");
337  return AVERROR_INVALIDDATA;
338  }
339  } else{
340  if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
341  s->rgb = 1;
342  else if (!s->lossless)
343  s->rgb = 0;
344  /* XXX: not complete test ! */
345  pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
346  (s->h_count[1] << 20) | (s->v_count[1] << 16) |
347  (s->h_count[2] << 12) | (s->v_count[2] << 8) |
348  (s->h_count[3] << 4) | s->v_count[3];
349  av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
350  /* NOTE we do not allocate pictures large enough for the possible
351  * padding of h/v_count being 4 */
352  if (!(pix_fmt_id & 0xD0D0D0D0))
353  pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
354  if (!(pix_fmt_id & 0x0D0D0D0D))
355  pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
356 
357  switch (pix_fmt_id) {
358  case 0x11111100:
359  if (s->rgb)
361  else {
362  if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
364  } else {
367  }
368  }
369  av_assert0(s->nb_components == 3);
370  break;
371  case 0x12121100:
372  case 0x22122100:
375  s->upscale_v = 2;
376  s->upscale_h = (pix_fmt_id == 0x22122100);
377  s->chroma_height = s->height;
378  break;
379  case 0x21211100:
380  case 0x22211200:
383  s->upscale_v = (pix_fmt_id == 0x22211200);
384  s->upscale_h = 2;
385  s->chroma_height = s->height;
386  break;
387  case 0x22221100:
390  s->upscale_v = 2;
391  s->upscale_h = 2;
392  s->chroma_height = s->height / 2;
393  break;
394  case 0x11000000:
395  case 0x13000000:
396  case 0x14000000:
397  case 0x31000000:
398  case 0x33000000:
399  case 0x34000000:
400  case 0x41000000:
401  case 0x43000000:
402  case 0x44000000:
403  if(s->bits <= 8)
405  else
407  break;
408  case 0x12111100:
409  case 0x22211100:
410  case 0x22112100:
413  s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
414  s->chroma_height = s->height / 2;
415  break;
416  case 0x21111100:
419  break;
420  case 0x22121100:
421  case 0x22111200:
424  s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
425  break;
426  case 0x22111100:
429  break;
430  default:
431  av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
432  return AVERROR_PATCHWELCOME;
433  }
434  if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
435  av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
436  return AVERROR_PATCHWELCOME;
437  }
438  if (s->ls) {
439  s->upscale_h = s->upscale_v = 0;
440  if (s->nb_components == 3) {
442  } else if (s->nb_components != 1) {
443  av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
444  return AVERROR_PATCHWELCOME;
445  } else if (s->bits <= 8)
447  else
449  }
450 
451  if (s->picture_ptr->data[0])
453 
454  if (ff_get_buffer(s->avctx, s->picture_ptr) < 0) {
455  av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
456  return -1;
457  }
459  s->picture_ptr->key_frame = 1;
460  s->got_picture = 1;
461 
462  for (i = 0; i < 3; i++)
463  s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
464 
465  av_dlog(s->avctx, "%d %d %d %d %d %d\n",
466  s->width, s->height, s->linesize[0], s->linesize[1],
467  s->interlaced, s->avctx->height);
468 
469  if (len != (8 + (3 * nb_components)))
470  av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
471  }
472 
473  if (s->rgb && !s->lossless && !s->ls) {
474  av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
475  return AVERROR_PATCHWELCOME;
476  }
477 
478  /* totally blank picture as progressive JPEG will only add details to it */
479  if (s->progressive) {
480  int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
481  int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
482  for (i = 0; i < s->nb_components; i++) {
483  int size = bw * bh * s->h_count[i] * s->v_count[i];
484  av_freep(&s->blocks[i]);
485  av_freep(&s->last_nnz[i]);
486  s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
487  s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
488  s->block_stride[i] = bw * s->h_count[i];
489  }
490  memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
491  }
492  return 0;
493 }
494 
495 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
496 {
497  int code;
498  code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
499  if (code < 0) {
501  "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
502  0, dc_index, &s->vlcs[0][dc_index]);
503  return 0xffff;
504  }
505 
506  if (code)
507  return get_xbits(&s->gb, code);
508  else
509  return 0;
510 }
511 
512 /* decode block and dequantize */
513 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
514  int dc_index, int ac_index, int16_t *quant_matrix)
515 {
516  int code, i, j, level, val;
517 
518  /* DC coef */
519  val = mjpeg_decode_dc(s, dc_index);
520  if (val == 0xffff) {
521  av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
522  return AVERROR_INVALIDDATA;
523  }
524  val = val * quant_matrix[0] + s->last_dc[component];
525  s->last_dc[component] = val;
526  block[0] = val;
527  /* AC coefs */
528  i = 0;
529  {OPEN_READER(re, &s->gb);
530  do {
531  UPDATE_CACHE(re, &s->gb);
532  GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
533 
534  i += ((unsigned)code) >> 4;
535  code &= 0xf;
536  if (code) {
537  if (code > MIN_CACHE_BITS - 16)
538  UPDATE_CACHE(re, &s->gb);
539 
540  {
541  int cache = GET_CACHE(re, &s->gb);
542  int sign = (~cache) >> 31;
543  level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
544  }
545 
546  LAST_SKIP_BITS(re, &s->gb, code);
547 
548  if (i > 63) {
549  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
550  return AVERROR_INVALIDDATA;
551  }
552  j = s->scantable.permutated[i];
553  block[j] = level * quant_matrix[j];
554  }
555  } while (i < 63);
556  CLOSE_READER(re, &s->gb);}
557 
558  return 0;
559 }
560 
562  int component, int dc_index,
563  int16_t *quant_matrix, int Al)
564 {
565  int val;
566  s->dsp.clear_block(block);
567  val = mjpeg_decode_dc(s, dc_index);
568  if (val == 0xffff) {
569  av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
570  return AVERROR_INVALIDDATA;
571  }
572  val = (val * quant_matrix[0] << Al) + s->last_dc[component];
573  s->last_dc[component] = val;
574  block[0] = val;
575  return 0;
576 }
577 
578 /* decode block and dequantize - progressive JPEG version */
580  uint8_t *last_nnz, int ac_index,
581  int16_t *quant_matrix,
582  int ss, int se, int Al, int *EOBRUN)
583 {
584  int code, i, j, level, val, run;
585 
586  if (*EOBRUN) {
587  (*EOBRUN)--;
588  return 0;
589  }
590 
591  {
592  OPEN_READER(re, &s->gb);
593  for (i = ss; ; i++) {
594  UPDATE_CACHE(re, &s->gb);
595  GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
596 
597  run = ((unsigned) code) >> 4;
598  code &= 0xF;
599  if (code) {
600  i += run;
601  if (code > MIN_CACHE_BITS - 16)
602  UPDATE_CACHE(re, &s->gb);
603 
604  {
605  int cache = GET_CACHE(re, &s->gb);
606  int sign = (~cache) >> 31;
607  level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
608  }
609 
610  LAST_SKIP_BITS(re, &s->gb, code);
611 
612  if (i >= se) {
613  if (i == se) {
614  j = s->scantable.permutated[se];
615  block[j] = level * quant_matrix[j] << Al;
616  break;
617  }
618  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
619  return AVERROR_INVALIDDATA;
620  }
621  j = s->scantable.permutated[i];
622  block[j] = level * quant_matrix[j] << Al;
623  } else {
624  if (run == 0xF) {// ZRL - skip 15 coefficients
625  i += 15;
626  if (i >= se) {
627  av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
628  return AVERROR_INVALIDDATA;
629  }
630  } else {
631  val = (1 << run);
632  if (run) {
633  UPDATE_CACHE(re, &s->gb);
634  val += NEG_USR32(GET_CACHE(re, &s->gb), run);
635  LAST_SKIP_BITS(re, &s->gb, run);
636  }
637  *EOBRUN = val - 1;
638  break;
639  }
640  }
641  }
642  CLOSE_READER(re, &s->gb);
643  }
644 
645  if (i > *last_nnz)
646  *last_nnz = i;
647 
648  return 0;
649 }
650 
651 #define REFINE_BIT(j) { \
652  UPDATE_CACHE(re, &s->gb); \
653  sign = block[j] >> 15; \
654  block[j] += SHOW_UBITS(re, &s->gb, 1) * \
655  ((quant_matrix[j] ^ sign) - sign) << Al; \
656  LAST_SKIP_BITS(re, &s->gb, 1); \
657 }
658 
659 #define ZERO_RUN \
660 for (; ; i++) { \
661  if (i > last) { \
662  i += run; \
663  if (i > se) { \
664  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
665  return -1; \
666  } \
667  break; \
668  } \
669  j = s->scantable.permutated[i]; \
670  if (block[j]) \
671  REFINE_BIT(j) \
672  else if (run-- == 0) \
673  break; \
674 }
675 
676 /* decode block and dequantize - progressive JPEG refinement pass */
678  uint8_t *last_nnz,
679  int ac_index, int16_t *quant_matrix,
680  int ss, int se, int Al, int *EOBRUN)
681 {
682  int code, i = ss, j, sign, val, run;
683  int last = FFMIN(se, *last_nnz);
684 
685  OPEN_READER(re, &s->gb);
686  if (*EOBRUN) {
687  (*EOBRUN)--;
688  } else {
689  for (; ; i++) {
690  UPDATE_CACHE(re, &s->gb);
691  GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
692 
693  if (code & 0xF) {
694  run = ((unsigned) code) >> 4;
695  UPDATE_CACHE(re, &s->gb);
696  val = SHOW_UBITS(re, &s->gb, 1);
697  LAST_SKIP_BITS(re, &s->gb, 1);
698  ZERO_RUN;
699  j = s->scantable.permutated[i];
700  val--;
701  block[j] = ((quant_matrix[j]^val) - val) << Al;
702  if (i == se) {
703  if (i > *last_nnz)
704  *last_nnz = i;
705  CLOSE_READER(re, &s->gb);
706  return 0;
707  }
708  } else {
709  run = ((unsigned) code) >> 4;
710  if (run == 0xF) {
711  ZERO_RUN;
712  } else {
713  val = run;
714  run = (1 << run);
715  if (val) {
716  UPDATE_CACHE(re, &s->gb);
717  run += SHOW_UBITS(re, &s->gb, val);
718  LAST_SKIP_BITS(re, &s->gb, val);
719  }
720  *EOBRUN = run - 1;
721  break;
722  }
723  }
724  }
725 
726  if (i > *last_nnz)
727  *last_nnz = i;
728  }
729 
730  for (; i <= last; i++) {
731  j = s->scantable.permutated[i];
732  if (block[j])
733  REFINE_BIT(j)
734  }
735  CLOSE_READER(re, &s->gb);
736 
737  return 0;
738 }
739 #undef REFINE_BIT
740 #undef ZERO_RUN
741 
742 static void handle_rstn(MJpegDecodeContext *s, int nb_components)
743 {
744  int i;
745  if (s->restart_interval) {
746  s->restart_count--;
747  if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
748  align_get_bits(&s->gb);
749  for (i = 0; i < nb_components; i++) /* reset dc */
750  s->last_dc[i] = 1024;
751  }
752 
753  i = 8 + ((-get_bits_count(&s->gb)) & 7);
754  /* skip RSTn */
755  if (s->restart_count == 0) {
756  if( show_bits(&s->gb, i) == (1 << i) - 1
757  || show_bits(&s->gb, i) == 0xFF) {
758  int pos = get_bits_count(&s->gb);
759  align_get_bits(&s->gb);
760  while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
761  skip_bits(&s->gb, 8);
762  if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
763  for (i = 0; i < nb_components; i++) /* reset dc */
764  s->last_dc[i] = 1024;
765  } else
766  skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
767  }
768  }
769  }
770 }
771 
772 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
773 {
774  int i, mb_x, mb_y;
775  uint16_t (*buffer)[4];
776  int left[3], top[3], topleft[3];
777  const int linesize = s->linesize[0];
778  const int mask = (1 << s->bits) - 1;
779  int resync_mb_y = 0;
780  int resync_mb_x = 0;
781 
782  if (s->nb_components != 3 && s->nb_components != 4)
783  return AVERROR_INVALIDDATA;
784  if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
785  return AVERROR_INVALIDDATA;
786 
787 
789 
791  (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
792  buffer = s->ljpeg_buffer;
793 
794  for (i = 0; i < 3; i++)
795  buffer[0][i] = 1 << (s->bits - 1);
796 
797  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
798  uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
799 
800  if (s->interlaced && s->bottom_field)
801  ptr += linesize >> 1;
802 
803  for (i = 0; i < 3; i++)
804  top[i] = left[i] = topleft[i] = buffer[0][i];
805 
806  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
807  int modified_predictor = predictor;
808 
809  if (s->restart_interval && !s->restart_count){
811  resync_mb_x = mb_x;
812  resync_mb_y = mb_y;
813  for(i=0; i<3; i++)
814  top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
815  }
816  if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
817  modified_predictor = 1;
818 
819  for (i=0;i<nb_components;i++) {
820  int pred, dc;
821 
822  topleft[i] = top[i];
823  top[i] = buffer[mb_x][i];
824 
825  PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
826 
827  dc = mjpeg_decode_dc(s, s->dc_index[i]);
828  if(dc == 0xFFFF)
829  return -1;
830 
831  left[i] = buffer[mb_x][i] =
832  mask & (pred + (dc << point_transform));
833  }
834 
835  if (s->restart_interval && !--s->restart_count) {
836  align_get_bits(&s->gb);
837  skip_bits(&s->gb, 16); /* skip RSTn */
838  }
839  }
840 
841  if (s->rct) {
842  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
843  ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
844  ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
845  ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
846  }
847  } else if (s->pegasus_rct) {
848  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
849  ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
850  ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
851  ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
852  }
853  } else {
854  for(i=0; i<nb_components; i++) {
855  int c= s->comp_index[i];
856  for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
857  ptr[3*mb_x+2-c] = buffer[mb_x][i];
858  }
859  }
860  }
861  }
862  return 0;
863 }
864 
865 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int nb_components, int predictor,
866  int point_transform)
867 {
868  int i, mb_x, mb_y;
869  int bits= (s->bits+7)&~7;
870  int resync_mb_y = 0;
871  int resync_mb_x = 0;
872 
873  point_transform += bits - s->bits;
874 
875  av_assert0(nb_components>=1 && nb_components<=3);
876 
877  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
878  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
879  if (s->restart_interval && !s->restart_count){
881  resync_mb_x = mb_x;
882  resync_mb_y = mb_y;
883  }
884 
885  if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
886  int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
887  int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
888  for (i = 0; i < nb_components; i++) {
889  uint8_t *ptr;
890  uint16_t *ptr16;
891  int n, h, v, x, y, c, j, linesize;
892  n = s->nb_blocks[i];
893  c = s->comp_index[i];
894  h = s->h_scount[i];
895  v = s->v_scount[i];
896  x = 0;
897  y = 0;
898  linesize= s->linesize[c];
899 
900  if(bits>8) linesize /= 2;
901 
902  for(j=0; j<n; j++) {
903  int pred, dc;
904 
905  dc = mjpeg_decode_dc(s, s->dc_index[i]);
906  if(dc == 0xFFFF)
907  return -1;
908  if(bits<=8){
909  ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
910  if(y==0 && toprow){
911  if(x==0 && leftcol){
912  pred= 1 << (bits - 1);
913  }else{
914  pred= ptr[-1];
915  }
916  }else{
917  if(x==0 && leftcol){
918  pred= ptr[-linesize];
919  }else{
920  PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
921  }
922  }
923 
924  if (s->interlaced && s->bottom_field)
925  ptr += linesize >> 1;
926  pred &= (-1)<<(8-s->bits);
927  *ptr= pred + (dc << point_transform);
928  }else{
929  ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
930  if(y==0 && toprow){
931  if(x==0 && leftcol){
932  pred= 1 << (bits - 1);
933  }else{
934  pred= ptr16[-1];
935  }
936  }else{
937  if(x==0 && leftcol){
938  pred= ptr16[-linesize];
939  }else{
940  PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
941  }
942  }
943 
944  if (s->interlaced && s->bottom_field)
945  ptr16 += linesize >> 1;
946  pred &= (-1)<<(16-s->bits);
947  *ptr16= pred + (dc << point_transform);
948  }
949  if (++x == h) {
950  x = 0;
951  y++;
952  }
953  }
954  }
955  } else {
956  for (i = 0; i < nb_components; i++) {
957  uint8_t *ptr;
958  uint16_t *ptr16;
959  int n, h, v, x, y, c, j, linesize, dc;
960  n = s->nb_blocks[i];
961  c = s->comp_index[i];
962  h = s->h_scount[i];
963  v = s->v_scount[i];
964  x = 0;
965  y = 0;
966  linesize = s->linesize[c];
967 
968  if(bits>8) linesize /= 2;
969 
970  for (j = 0; j < n; j++) {
971  int pred;
972 
973  dc = mjpeg_decode_dc(s, s->dc_index[i]);
974  if(dc == 0xFFFF)
975  return -1;
976  if(bits<=8){
977  ptr = s->picture.data[c] +
978  (linesize * (v * mb_y + y)) +
979  (h * mb_x + x); //FIXME optimize this crap
980  PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
981 
982  pred &= (-1)<<(8-s->bits);
983  *ptr = pred + (dc << point_transform);
984  }else{
985  ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
986  PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
987 
988  pred &= (-1)<<(16-s->bits);
989  *ptr16= pred + (dc << point_transform);
990  }
991 
992  if (++x == h) {
993  x = 0;
994  y++;
995  }
996  }
997  }
998  }
999  if (s->restart_interval && !--s->restart_count) {
1000  align_get_bits(&s->gb);
1001  skip_bits(&s->gb, 16); /* skip RSTn */
1002  }
1003  }
1004  }
1005  return 0;
1006 }
1007 
1009  uint8_t *dst, const uint8_t *src,
1010  int linesize, int lowres)
1011 {
1012  switch (lowres) {
1013  case 0: s->dsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1014  break;
1015  case 1: copy_block4(dst, src, linesize, linesize, 4);
1016  break;
1017  case 2: copy_block2(dst, src, linesize, linesize, 2);
1018  break;
1019  case 3: *dst = *src;
1020  break;
1021  }
1022 }
1023 
1024 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1025  int Al, const uint8_t *mb_bitmask,
1026  const AVFrame *reference)
1027 {
1028  int i, mb_x, mb_y;
1030  const uint8_t *reference_data[MAX_COMPONENTS];
1031  int linesize[MAX_COMPONENTS];
1032  GetBitContext mb_bitmask_gb;
1033 
1034  if (mb_bitmask)
1035  init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1036 
1037  if (s->flipped && s->avctx->lowres) {
1038  av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
1039  s->flipped = 0;
1040  }
1041 
1042  for (i = 0; i < nb_components; i++) {
1043  int c = s->comp_index[i];
1044  data[c] = s->picture_ptr->data[c];
1045  reference_data[c] = reference ? reference->data[c] : NULL;
1046  linesize[c] = s->linesize[c];
1047  s->coefs_finished[c] |= 1;
1048  if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1049  // picture should be flipped upside-down for this codec
1050  int offset = (linesize[c] * (s->v_scount[i] *
1051  (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
1052  data[c] += offset;
1053  reference_data[c] += offset;
1054  linesize[c] *= -1;
1055  }
1056  }
1057 
1058  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1059  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1060  const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1061 
1062  if (s->restart_interval && !s->restart_count)
1064 
1065  if (get_bits_left(&s->gb) < 0) {
1066  av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1067  -get_bits_left(&s->gb));
1068  return AVERROR_INVALIDDATA;
1069  }
1070  for (i = 0; i < nb_components; i++) {
1071  uint8_t *ptr;
1072  int n, h, v, x, y, c, j;
1073  int block_offset;
1074  n = s->nb_blocks[i];
1075  c = s->comp_index[i];
1076  h = s->h_scount[i];
1077  v = s->v_scount[i];
1078  x = 0;
1079  y = 0;
1080  for (j = 0; j < n; j++) {
1081  block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1082  (h * mb_x + x) * 8) >> s->avctx->lowres);
1083 
1084  if (s->interlaced && s->bottom_field)
1085  block_offset += linesize[c] >> 1;
1086  if ( 8*(h * mb_x + x) < s->width
1087  && 8*(v * mb_y + y) < s->height) {
1088  ptr = data[c] + block_offset;
1089  } else
1090  ptr = NULL;
1091  if (!s->progressive) {
1092  if (copy_mb) {
1093  if (ptr)
1094  mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1095  linesize[c], s->avctx->lowres);
1096 
1097  } else {
1098  s->dsp.clear_block(s->block);
1099  if (decode_block(s, s->block, i,
1100  s->dc_index[i], s->ac_index[i],
1101  s->quant_matrixes[s->quant_index[c]]) < 0) {
1103  "error y=%d x=%d\n", mb_y, mb_x);
1104  return AVERROR_INVALIDDATA;
1105  }
1106  if (ptr) {
1107  s->dsp.idct_put(ptr, linesize[c], s->block);
1108  }
1109  }
1110  } else {
1111  int block_idx = s->block_stride[c] * (v * mb_y + y) +
1112  (h * mb_x + x);
1113  int16_t *block = s->blocks[c][block_idx];
1114  if (Ah)
1115  block[0] += get_bits1(&s->gb) *
1116  s->quant_matrixes[s->quant_index[c]][0] << Al;
1117  else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1118  s->quant_matrixes[s->quant_index[c]],
1119  Al) < 0) {
1121  "error y=%d x=%d\n", mb_y, mb_x);
1122  return AVERROR_INVALIDDATA;
1123  }
1124  }
1125  av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1126  av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1127  mb_x, mb_y, x, y, c, s->bottom_field,
1128  (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1129  if (++x == h) {
1130  x = 0;
1131  y++;
1132  }
1133  }
1134  }
1135 
1136  handle_rstn(s, nb_components);
1137  }
1138  }
1139  return 0;
1140 }
1141 
1143  int se, int Ah, int Al)
1144 {
1145  int mb_x, mb_y;
1146  int EOBRUN = 0;
1147  int c = s->comp_index[0];
1148  uint8_t *data = s->picture.data[c];
1149  int linesize = s->linesize[c];
1150  int last_scan = 0;
1151  int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
1152 
1153  if (se > 63) {
1154  av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
1155  return AVERROR_INVALIDDATA;
1156  }
1157 
1158  if (!Al) {
1159  s->coefs_finished[c] |= (2LL << se) - (1LL << ss);
1160  last_scan = !~s->coefs_finished[c];
1161  }
1162 
1163  if (s->interlaced && s->bottom_field)
1164  data += linesize >> 1;
1165 
1166  s->restart_count = 0;
1167 
1168  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1169  uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1170  int block_idx = mb_y * s->block_stride[c];
1171  int16_t (*block)[64] = &s->blocks[c][block_idx];
1172  uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1173  for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1174  int ret;
1175  if (s->restart_interval && !s->restart_count)
1177 
1178  if (Ah)
1179  ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1180  quant_matrix, ss, se, Al, &EOBRUN);
1181  else
1182  ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1183  quant_matrix, ss, se, Al, &EOBRUN);
1184  if (ret < 0) {
1186  "error y=%d x=%d\n", mb_y, mb_x);
1187  return AVERROR_INVALIDDATA;
1188  }
1189 
1190  if (last_scan) {
1191  s->dsp.idct_put(ptr, linesize, *block);
1192  ptr += 8 >> s->avctx->lowres;
1193  }
1194  handle_rstn(s, 0);
1195  }
1196  }
1197  return 0;
1198 }
1199 
1201  const AVFrame *reference)
1202 {
1203  int len, nb_components, i, h, v, predictor, point_transform;
1204  int index, id, ret;
1205  const int block_size = s->lossless ? 1 : 8;
1206  int ilv, prev_shift;
1207 
1208  if (!s->got_picture) {
1210  "Can not process SOS before SOF, skipping\n");
1211  return -1;
1212  }
1213 
1214  av_assert0(s->picture_ptr->data[0]);
1215  /* XXX: verify len field validity */
1216  len = get_bits(&s->gb, 16);
1217  nb_components = get_bits(&s->gb, 8);
1218  if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1220  "decode_sos: nb_components (%d) unsupported\n", nb_components);
1221  return AVERROR_PATCHWELCOME;
1222  }
1223  if (len != 6 + 2 * nb_components) {
1224  av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1225  return AVERROR_INVALIDDATA;
1226  }
1227  for (i = 0; i < nb_components; i++) {
1228  id = get_bits(&s->gb, 8) - 1;
1229  av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1230  /* find component index */
1231  for (index = 0; index < s->nb_components; index++)
1232  if (id == s->component_id[index])
1233  break;
1234  if (index == s->nb_components) {
1236  "decode_sos: index(%d) out of components\n", index);
1237  return AVERROR_INVALIDDATA;
1238  }
1239  /* Metasoft MJPEG codec has Cb and Cr swapped */
1240  if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1241  && nb_components == 3 && s->nb_components == 3 && i)
1242  index = 3 - i;
1243 
1244  if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1245  index = (i+2)%3;
1246  if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1247  index = (index+2)%3;
1248 
1249  s->comp_index[i] = index;
1250 
1251  s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1252  s->h_scount[i] = s->h_count[index];
1253  s->v_scount[i] = s->v_count[index];
1254 
1255  s->dc_index[i] = get_bits(&s->gb, 4);
1256  s->ac_index[i] = get_bits(&s->gb, 4);
1257 
1258  if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1259  s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1260  goto out_of_range;
1261  if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
1262  goto out_of_range;
1263  }
1264 
1265  predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1266  ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1267  if(s->avctx->codec_tag != AV_RL32("CJPG")){
1268  prev_shift = get_bits(&s->gb, 4); /* Ah */
1269  point_transform = get_bits(&s->gb, 4); /* Al */
1270  }else
1271  prev_shift = point_transform = 0;
1272 
1273  if (nb_components > 1) {
1274  /* interleaved stream */
1275  s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1276  s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1277  } else if (!s->ls) { /* skip this for JPEG-LS */
1278  h = s->h_max / s->h_scount[0];
1279  v = s->v_max / s->v_scount[0];
1280  s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1281  s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1282  s->nb_blocks[0] = 1;
1283  s->h_scount[0] = 1;
1284  s->v_scount[0] = 1;
1285  }
1286 
1287  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1288  av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1289  s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1290  predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1291  s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1292 
1293 
1294  /* mjpeg-b can have padding bytes between sos and image data, skip them */
1295  for (i = s->mjpb_skiptosod; i > 0; i--)
1296  skip_bits(&s->gb, 8);
1297 
1298 next_field:
1299  for (i = 0; i < nb_components; i++)
1300  s->last_dc[i] = 1024;
1301 
1302  if (s->lossless) {
1303  av_assert0(s->picture_ptr == &s->picture);
1304  if (CONFIG_JPEGLS_DECODER && s->ls) {
1305 // for () {
1306 // reset_ls_coding_parameters(s, 0);
1307 
1308  if ((ret = ff_jpegls_decode_picture(s, predictor,
1309  point_transform, ilv)) < 0)
1310  return ret;
1311  } else {
1312  if (s->rgb) {
1313  if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1314  return ret;
1315  } else {
1316  if ((ret = ljpeg_decode_yuv_scan(s, nb_components, predictor, point_transform)) < 0)
1317  return ret;
1318  }
1319  }
1320  } else {
1321  if (s->progressive && predictor) {
1322  av_assert0(s->picture_ptr == &s->picture);
1323  if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1324  ilv, prev_shift,
1325  point_transform)) < 0)
1326  return ret;
1327  } else {
1328  if ((ret = mjpeg_decode_scan(s, nb_components,
1329  prev_shift, point_transform,
1330  mb_bitmask, reference)) < 0)
1331  return ret;
1332  }
1333  }
1334 
1335  if (s->interlaced &&
1336  get_bits_left(&s->gb) > 32 &&
1337  show_bits(&s->gb, 8) == 0xFF) {
1338  GetBitContext bak = s->gb;
1339  align_get_bits(&bak);
1340  if (show_bits(&bak, 16) == 0xFFD1) {
1341  av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1342  s->gb = bak;
1343  skip_bits(&s->gb, 16);
1344  s->bottom_field ^= 1;
1345 
1346  goto next_field;
1347  }
1348  }
1349 
1350  emms_c();
1351  return 0;
1352  out_of_range:
1353  av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1354  return AVERROR_INVALIDDATA;
1355 }
1356 
1358 {
1359  if (get_bits(&s->gb, 16) != 4)
1360  return AVERROR_INVALIDDATA;
1361  s->restart_interval = get_bits(&s->gb, 16);
1362  s->restart_count = 0;
1363  av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1364  s->restart_interval);
1365 
1366  return 0;
1367 }
1368 
1370 {
1371  int len, id, i;
1372 
1373  len = get_bits(&s->gb, 16);
1374  if (len < 5)
1375  return AVERROR_INVALIDDATA;
1376  if (8 * len > get_bits_left(&s->gb))
1377  return AVERROR_INVALIDDATA;
1378 
1379  id = get_bits_long(&s->gb, 32);
1380  len -= 6;
1381 
1382  if (s->avctx->debug & FF_DEBUG_STARTCODE)
1383  av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1384 
1385  /* Buggy AVID, it puts EOI only at every 10th frame. */
1386  /* Also, this fourcc is used by non-avid files too, it holds some
1387  information, but it's always present in AVID-created files. */
1388  if (id == AV_RB32("AVI1")) {
1389  /* structure:
1390  4bytes AVI1
1391  1bytes polarity
1392  1bytes always zero
1393  4bytes field_size
1394  4bytes field_size_less_padding
1395  */
1396  s->buggy_avid = 1;
1397  i = get_bits(&s->gb, 8); len--;
1398  av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1399 #if 0
1400  skip_bits(&s->gb, 8);
1401  skip_bits(&s->gb, 32);
1402  skip_bits(&s->gb, 32);
1403  len -= 10;
1404 #endif
1405  goto out;
1406  }
1407 
1408 // len -= 2;
1409 
1410  if (id == AV_RB32("JFIF")) {
1411  int t_w, t_h, v1, v2;
1412  skip_bits(&s->gb, 8); /* the trailing zero-byte */
1413  v1 = get_bits(&s->gb, 8);
1414  v2 = get_bits(&s->gb, 8);
1415  skip_bits(&s->gb, 8);
1416 
1417  s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1418  s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1419 
1420  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1421  av_log(s->avctx, AV_LOG_INFO,
1422  "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1423  v1, v2,
1426 
1427  t_w = get_bits(&s->gb, 8);
1428  t_h = get_bits(&s->gb, 8);
1429  if (t_w && t_h) {
1430  /* skip thumbnail */
1431  if (len -10 - (t_w * t_h * 3) > 0)
1432  len -= t_w * t_h * 3;
1433  }
1434  len -= 10;
1435  goto out;
1436  }
1437 
1438  if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1439  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1440  av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1441  skip_bits(&s->gb, 16); /* version */
1442  skip_bits(&s->gb, 16); /* flags0 */
1443  skip_bits(&s->gb, 16); /* flags1 */
1444  skip_bits(&s->gb, 8); /* transform */
1445  len -= 7;
1446  goto out;
1447  }
1448 
1449  if (id == AV_RB32("LJIF")) {
1450  int rgb = s->rgb;
1451  int pegasus_rct = s->pegasus_rct;
1452  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1453  av_log(s->avctx, AV_LOG_INFO,
1454  "Pegasus lossless jpeg header found\n");
1455  skip_bits(&s->gb, 16); /* version ? */
1456  skip_bits(&s->gb, 16); /* unknown always 0? */
1457  skip_bits(&s->gb, 16); /* unknown always 0? */
1458  skip_bits(&s->gb, 16); /* unknown always 0? */
1459  switch (get_bits(&s->gb, 8)) {
1460  case 1:
1461  rgb = 1;
1462  pegasus_rct = 0;
1463  break;
1464  case 2:
1465  rgb = 1;
1466  pegasus_rct = 1;
1467  break;
1468  default:
1469  av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1470  }
1471 
1472  len -= 9;
1473  if (s->got_picture)
1474  if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1475  av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1476  goto out;
1477  }
1478 
1479  s->rgb = rgb;
1480  s->pegasus_rct = pegasus_rct;
1481 
1482  goto out;
1483  }
1484 
1485  /* Apple MJPEG-A */
1486  if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1487  id = get_bits_long(&s->gb, 32);
1488  len -= 4;
1489  /* Apple MJPEG-A */
1490  if (id == AV_RB32("mjpg")) {
1491 #if 0
1492  skip_bits(&s->gb, 32); /* field size */
1493  skip_bits(&s->gb, 32); /* pad field size */
1494  skip_bits(&s->gb, 32); /* next off */
1495  skip_bits(&s->gb, 32); /* quant off */
1496  skip_bits(&s->gb, 32); /* huff off */
1497  skip_bits(&s->gb, 32); /* image off */
1498  skip_bits(&s->gb, 32); /* scan off */
1499  skip_bits(&s->gb, 32); /* data off */
1500 #endif
1501  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1502  av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1503  }
1504  }
1505 
1506 out:
1507  /* slow but needed for extreme adobe jpegs */
1508  if (len < 0)
1510  "mjpeg: error, decode_app parser read over the end\n");
1511  while (--len > 0)
1512  skip_bits(&s->gb, 8);
1513 
1514  return 0;
1515 }
1516 
1518 {
1519  int len = get_bits(&s->gb, 16);
1520  if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1521  char *cbuf = av_malloc(len - 1);
1522  if (cbuf) {
1523  int i;
1524  for (i = 0; i < len - 2; i++)
1525  cbuf[i] = get_bits(&s->gb, 8);
1526  if (i > 0 && cbuf[i - 1] == '\n')
1527  cbuf[i - 1] = 0;
1528  else
1529  cbuf[i] = 0;
1530 
1531  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1532  av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1533 
1534  /* buggy avid, it puts EOI only at every 10th frame */
1535  if (!strcmp(cbuf, "AVID")) {
1536  s->buggy_avid = 1;
1537  } else if (!strcmp(cbuf, "CS=ITU601"))
1538  s->cs_itu601 = 1;
1539  else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
1540  (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1541  s->flipped = 1;
1542 
1543  av_free(cbuf);
1544  }
1545  }
1546 
1547  return 0;
1548 }
1549 
1550 /* return the 8 bit start code value and update the search
1551  state. Return -1 if no start code found */
1552 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1553 {
1554  const uint8_t *buf_ptr;
1555  unsigned int v, v2;
1556  int val;
1557  int skipped = 0;
1558 
1559  buf_ptr = *pbuf_ptr;
1560  while (buf_ptr < buf_end) {
1561  v = *buf_ptr++;
1562  v2 = *buf_ptr;
1563  if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1564  val = *buf_ptr++;
1565  goto found;
1566  }
1567  skipped++;
1568  }
1569  val = -1;
1570 found:
1571  av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1572  *pbuf_ptr = buf_ptr;
1573  return val;
1574 }
1575 
1577  const uint8_t **buf_ptr, const uint8_t *buf_end,
1578  const uint8_t **unescaped_buf_ptr,
1579  int *unescaped_buf_size)
1580 {
1581  int start_code;
1582  start_code = find_marker(buf_ptr, buf_end);
1583 
1584  av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1585  if (!s->buffer)
1586  return AVERROR(ENOMEM);
1587 
1588  /* unescape buffer of SOS, use special treatment for JPEG-LS */
1589  if (start_code == SOS && !s->ls) {
1590  const uint8_t *src = *buf_ptr;
1591  uint8_t *dst = s->buffer;
1592 
1593  while (src < buf_end) {
1594  uint8_t x = *(src++);
1595 
1596  *(dst++) = x;
1597  if (s->avctx->codec_id != AV_CODEC_ID_THP) {
1598  if (x == 0xff) {
1599  while (src < buf_end && x == 0xff)
1600  x = *(src++);
1601 
1602  if (x >= 0xd0 && x <= 0xd7)
1603  *(dst++) = x;
1604  else if (x)
1605  break;
1606  }
1607  }
1608  }
1609  *unescaped_buf_ptr = s->buffer;
1610  *unescaped_buf_size = dst - s->buffer;
1611  memset(s->buffer + *unescaped_buf_size, 0,
1613 
1614  av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
1615  (buf_end - *buf_ptr) - (dst - s->buffer));
1616  } else if (start_code == SOS && s->ls) {
1617  const uint8_t *src = *buf_ptr;
1618  uint8_t *dst = s->buffer;
1619  int bit_count = 0;
1620  int t = 0, b = 0;
1621  PutBitContext pb;
1622 
1623  /* find marker */
1624  while (src + t < buf_end) {
1625  uint8_t x = src[t++];
1626  if (x == 0xff) {
1627  while ((src + t < buf_end) && x == 0xff)
1628  x = src[t++];
1629  if (x & 0x80) {
1630  t -= FFMIN(2, t);
1631  break;
1632  }
1633  }
1634  }
1635  bit_count = t * 8;
1636  init_put_bits(&pb, dst, t);
1637 
1638  /* unescape bitstream */
1639  while (b < t) {
1640  uint8_t x = src[b++];
1641  put_bits(&pb, 8, x);
1642  if (x == 0xFF) {
1643  x = src[b++];
1644  if (x & 0x80) {
1645  av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
1646  x &= 0x7f;
1647  }
1648  put_bits(&pb, 7, x);
1649  bit_count--;
1650  }
1651  }
1652  flush_put_bits(&pb);
1653 
1654  *unescaped_buf_ptr = dst;
1655  *unescaped_buf_size = (bit_count + 7) >> 3;
1656  memset(s->buffer + *unescaped_buf_size, 0,
1658  } else {
1659  *unescaped_buf_ptr = *buf_ptr;
1660  *unescaped_buf_size = buf_end - *buf_ptr;
1661  }
1662 
1663  return start_code;
1664 }
1665 
1666 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1667  AVPacket *avpkt)
1668 {
1669  const uint8_t *buf = avpkt->data;
1670  int buf_size = avpkt->size;
1671  MJpegDecodeContext *s = avctx->priv_data;
1672  const uint8_t *buf_end, *buf_ptr;
1673  const uint8_t *unescaped_buf_ptr;
1674  int hshift, vshift;
1675  int unescaped_buf_size;
1676  int start_code;
1677  int i, index;
1678  int ret = 0;
1679  AVFrame *picture = data;
1680 
1681  buf_ptr = buf;
1682  buf_end = buf + buf_size;
1683  while (buf_ptr < buf_end) {
1684  /* find start next marker */
1685  start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
1686  &unescaped_buf_ptr,
1687  &unescaped_buf_size);
1688  /* EOF */
1689  if (start_code < 0) {
1690  break;
1691  } else if (unescaped_buf_size > (1U<<28)) {
1692  av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1693  start_code, unescaped_buf_size, buf_size);
1694  return AVERROR_INVALIDDATA;
1695  } else {
1696  av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
1697  start_code, buf_end - buf_ptr);
1698 
1699  init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
1700 
1701  s->start_code = start_code;
1702  if (s->avctx->debug & FF_DEBUG_STARTCODE)
1703  av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1704 
1705  /* process markers */
1706  if (start_code >= 0xd0 && start_code <= 0xd7)
1707  av_log(avctx, AV_LOG_DEBUG,
1708  "restart marker: %d\n", start_code & 0x0f);
1709  /* APP fields */
1710  else if (start_code >= APP0 && start_code <= APP15)
1711  mjpeg_decode_app(s);
1712  /* Comment */
1713  else if (start_code == COM)
1714  mjpeg_decode_com(s);
1715 
1716  ret = -1;
1717  switch (start_code) {
1718  case SOI:
1719  s->restart_interval = 0;
1720  s->restart_count = 0;
1721  /* nothing to do on SOI */
1722  break;
1723  case DQT:
1725  break;
1726  case DHT:
1727  if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
1728  av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
1729  goto fail;
1730  }
1731  break;
1732  case SOF0:
1733  case SOF1:
1734  s->lossless = 0;
1735  s->ls = 0;
1736  s->progressive = 0;
1737  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1738  goto fail;
1739  break;
1740  case SOF2:
1741  s->lossless = 0;
1742  s->ls = 0;
1743  s->progressive = 1;
1744  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1745  goto fail;
1746  break;
1747  case SOF3:
1748  s->lossless = 1;
1749  s->ls = 0;
1750  s->progressive = 0;
1751  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1752  goto fail;
1753  break;
1754  case SOF48:
1755  s->lossless = 1;
1756  s->ls = 1;
1757  s->progressive = 0;
1758  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
1759  goto fail;
1760  break;
1761  case LSE:
1762  if (!CONFIG_JPEGLS_DECODER ||
1763  (ret = ff_jpegls_decode_lse(s)) < 0)
1764  goto fail;
1765  break;
1766  case EOI:
1767 eoi_parser:
1768  s->cur_scan = 0;
1769  if (!s->got_picture) {
1770  av_log(avctx, AV_LOG_WARNING,
1771  "Found EOI before any SOF, ignoring\n");
1772  break;
1773  }
1774  if (s->interlaced) {
1775  s->bottom_field ^= 1;
1776  /* if not bottom field, do not output image yet */
1777  if (s->bottom_field == !s->interlace_polarity)
1778  break;
1779  }
1780  *picture = *s->picture_ptr;
1781  *got_frame = 1;
1782  s->got_picture = 0;
1783 
1784  if (!s->lossless) {
1785  picture->quality = FFMAX3(s->qscale[0],
1786  s->qscale[1],
1787  s->qscale[2]);
1788  picture->qstride = 0;
1789  picture->qscale_table = s->qscale_table;
1790  memset(picture->qscale_table, picture->quality,
1791  (s->width + 15) / 16);
1792  if (avctx->debug & FF_DEBUG_QP)
1793  av_log(avctx, AV_LOG_DEBUG,
1794  "QP: %d\n", picture->quality);
1795  picture->quality *= FF_QP2LAMBDA;
1796  }
1797 
1798  goto the_end;
1799  case SOS:
1800  s->cur_scan++;
1801  if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
1802  (avctx->err_recognition & AV_EF_EXPLODE))
1803  goto fail;
1804  break;
1805  case DRI:
1806  mjpeg_decode_dri(s);
1807  break;
1808  case SOF5:
1809  case SOF6:
1810  case SOF7:
1811  case SOF9:
1812  case SOF10:
1813  case SOF11:
1814  case SOF13:
1815  case SOF14:
1816  case SOF15:
1817  case JPG:
1818  av_log(avctx, AV_LOG_ERROR,
1819  "mjpeg: unsupported coding type (%x)\n", start_code);
1820  break;
1821  }
1822 
1823  /* eof process start code */
1824  buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
1825  av_log(avctx, AV_LOG_DEBUG,
1826  "marker parser used %d bytes (%d bits)\n",
1827  (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
1828  }
1829  }
1830  if (s->got_picture && s->cur_scan) {
1831  av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
1832  goto eoi_parser;
1833  }
1834  av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
1835  return AVERROR_INVALIDDATA;
1836 fail:
1837  s->got_picture = 0;
1838  return ret;
1839 the_end:
1840  if (s->upscale_h) {
1841  uint8_t *line = s->picture_ptr->data[s->upscale_h];
1843  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1844  avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
1845  avctx->pix_fmt == AV_PIX_FMT_YUV440P);
1846  for (i = 0; i < s->chroma_height; i++) {
1847  for (index = s->width - 1; index; index--)
1848  line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
1849  line += s->linesize[s->upscale_h];
1850  }
1851  }
1852  if (s->upscale_v) {
1853  uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
1854  int w;
1855  avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1856  w = s->width >> hshift;
1858  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
1859  avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
1860  avctx->pix_fmt == AV_PIX_FMT_YUV422P);
1861  for (i = s->height - 1; i; i--) {
1862  uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
1863  uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
1864  if (src1 == src2) {
1865  memcpy(dst, src1, w);
1866  } else {
1867  for (index = 0; index < w; index++)
1868  dst[index] = (src1[index] + src2[index]) >> 1;
1869  }
1870  dst -= s->linesize[s->upscale_v];
1871  }
1872  }
1873  if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
1874  int j;
1875  avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
1876  for (index=0; index<4; index++) {
1877  uint8_t *dst = s->picture_ptr->data[index];
1878  int w = s->width;
1879  int h = s->height;
1880  if(index && index<3){
1881  w = -((-w) >> hshift);
1882  h = -((-h) >> vshift);
1883  }
1884  if(dst){
1885  uint8_t *dst2 = dst + s->linesize[index]*(h-1);
1886  for (i=0; i<h/2; i++) {
1887  for (j=0; j<w; j++)
1888  FFSWAP(int, dst[j], dst2[j]);
1889  dst += s->linesize[index];
1890  dst2 -= s->linesize[index];
1891  }
1892  }
1893  }
1894  }
1895 
1896  av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
1897  buf_end - buf_ptr);
1898 // return buf_end - buf_ptr;
1899  return buf_ptr - buf;
1900 }
1901 
1903 {
1904  MJpegDecodeContext *s = avctx->priv_data;
1905  int i, j;
1906 
1907  if (s->picture_ptr && s->picture_ptr->data[0])
1908  avctx->release_buffer(avctx, s->picture_ptr);
1909 
1910  av_free(s->buffer);
1911  av_free(s->qscale_table);
1912  av_freep(&s->ljpeg_buffer);
1913  s->ljpeg_buffer_size = 0;
1914 
1915  for (i = 0; i < 3; i++) {
1916  for (j = 0; j < 4; j++)
1917  ff_free_vlc(&s->vlcs[i][j]);
1918  }
1919  for (i = 0; i < MAX_COMPONENTS; i++) {
1920  av_freep(&s->blocks[i]);
1921  av_freep(&s->last_nnz[i]);
1922  }
1923  return 0;
1924 }
1925 
1926 static void decode_flush(AVCodecContext *avctx)
1927 {
1928  MJpegDecodeContext *s = avctx->priv_data;
1929  s->got_picture = 0;
1930 }
1931 
1932 #if CONFIG_MJPEG_DECODER
1933 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1934 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1935 static const AVOption options[] = {
1936  { "extern_huff", "Use external huffman table.",
1937  OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1938  { NULL },
1939 };
1940 
1941 static const AVClass mjpegdec_class = {
1942  .class_name = "MJPEG decoder",
1943  .item_name = av_default_item_name,
1944  .option = options,
1945  .version = LIBAVUTIL_VERSION_INT,
1946 };
1947 
1948 AVCodec ff_mjpeg_decoder = {
1949  .name = "mjpeg",
1950  .type = AVMEDIA_TYPE_VIDEO,
1951  .id = AV_CODEC_ID_MJPEG,
1952  .priv_data_size = sizeof(MJpegDecodeContext),
1956  .flush = decode_flush,
1957  .capabilities = CODEC_CAP_DR1,
1958  .max_lowres = 3,
1959  .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
1960  .priv_class = &mjpegdec_class,
1961 };
1962 #endif
1963 #if CONFIG_THP_DECODER
1964 AVCodec ff_thp_decoder = {
1965  .name = "thp",
1966  .type = AVMEDIA_TYPE_VIDEO,
1967  .id = AV_CODEC_ID_THP,
1968  .priv_data_size = sizeof(MJpegDecodeContext),
1972  .flush = decode_flush,
1973  .capabilities = CODEC_CAP_DR1,
1974  .max_lowres = 3,
1975  .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
1976 };
1977 #endif