FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mjpegdec.c
Go to the documentation of this file.
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 
28 /**
29  * @file
30  * MJPEG decoder.
31  */
32 
33 #include "libavutil/imgutils.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
36 #include "avcodec.h"
37 #include "blockdsp.h"
38 #include "copy_block.h"
39 #include "idctdsp.h"
40 #include "internal.h"
41 #include "jpegtables.h"
42 #include "mjpeg.h"
43 #include "mjpegdec.h"
44 #include "jpeglsdec.h"
45 #include "put_bits.h"
46 #include "tiff.h"
47 #include "exif.h"
48 #include "bytestream.h"
49 
50 
51 static int build_vlc(VLC *vlc, const uint8_t *bits_table,
52  const uint8_t *val_table, int nb_codes,
53  int use_static, int is_ac)
54 {
55  uint8_t huff_size[256] = { 0 };
56  uint16_t huff_code[256];
57  uint16_t huff_sym[256];
58  int i;
59 
60  av_assert0(nb_codes <= 256);
61 
62  ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
63 
64  for (i = 0; i < 256; i++)
65  huff_sym[i] = i + 16 * is_ac;
66 
67  if (is_ac)
68  huff_sym[0] = 16 * 256;
69 
70  return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
71  huff_code, 2, 2, huff_sym, 2, 2, use_static);
72 }
73 
74 static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
75 {
76  build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
77  avpriv_mjpeg_val_dc, 12, 0, 0);
78  build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
79  avpriv_mjpeg_val_dc, 12, 0, 0);
80  build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
81  avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
82  build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
83  avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
84  build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
85  avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
86  build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
87  avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
88 }
89 
90 static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
91 {
92  s->buggy_avid = 1;
93  if (len > 14 && buf[12] == 1) /* 1 - NTSC */
94  s->interlace_polarity = 1;
95  if (len > 14 && buf[12] == 2) /* 2 - PAL */
96  s->interlace_polarity = 0;
97  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
98  av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
99 }
100 
101 static void init_idct(AVCodecContext *avctx)
102 {
103  MJpegDecodeContext *s = avctx->priv_data;
104 
105  ff_idctdsp_init(&s->idsp, avctx);
106  ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
107  ff_zigzag_direct);
108 }
109 
110 av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
111 {
112  MJpegDecodeContext *s = avctx->priv_data;
113 
114  if (!s->picture_ptr) {
115  s->picture = av_frame_alloc();
116  if (!s->picture)
117  return AVERROR(ENOMEM);
118  s->picture_ptr = s->picture;
119  }
120 
121  s->avctx = avctx;
122  ff_blockdsp_init(&s->bdsp, avctx);
123  ff_hpeldsp_init(&s->hdsp, avctx->flags);
124  init_idct(avctx);
125  s->buffer_size = 0;
126  s->buffer = NULL;
127  s->start_code = -1;
128  s->first_picture = 1;
129  s->got_picture = 0;
130  s->org_height = avctx->coded_height;
131  avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
132  avctx->colorspace = AVCOL_SPC_BT470BG;
133 
134  build_basic_mjpeg_vlc(s);
135 
136  if (s->extern_huff) {
137  av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
138  init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
139  if (ff_mjpeg_decode_dht(s)) {
140  av_log(avctx, AV_LOG_ERROR,
141  "error using external huffman table, switching back to internal\n");
142  build_basic_mjpeg_vlc(s);
143  }
144  }
145  if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
146  s->interlace_polarity = 1; /* bottom field first */
147  av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
148  } else if (avctx->field_order == AV_FIELD_UNKNOWN) {
149  if (avctx->codec_tag == AV_RL32("MJPG"))
150  s->interlace_polarity = 1;
151  }
152 
153  if ( avctx->extradata_size > 8
154  && AV_RL32(avctx->extradata) == 0x2C
155  && AV_RL32(avctx->extradata+4) == 0x18) {
156  parse_avid(s, avctx->extradata, avctx->extradata_size);
157  }
158 
159  if (avctx->codec->id == AV_CODEC_ID_AMV)
160  s->flipped = 1;
161 
162  return 0;
163 }
164 
165 
166 /* quantize tables */
167 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
168 {
169  int len, index, i, j;
170 
171  len = get_bits(&s->gb, 16) - 2;
172 
173  if (8*len > get_bits_left(&s->gb)) {
174  av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
175  return AVERROR_INVALIDDATA;
176  }
177 
178  while (len >= 65) {
179  int pr = get_bits(&s->gb, 4);
180  if (pr > 1) {
181  av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
182  return AVERROR_INVALIDDATA;
183  }
184  index = get_bits(&s->gb, 4);
185  if (index >= 4)
186  return -1;
187  av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
188  /* read quant table */
189  for (i = 0; i < 64; i++) {
190  j = s->scantable.permutated[i];
191  s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
192  }
193 
194  // XXX FIXME finetune, and perhaps add dc too
195  s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
196  s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
197  av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
198  index, s->qscale[index]);
199  len -= 1 + 64 * (1+pr);
200  }
201  return 0;
202 }
203 
204 /* decode huffman tables and build VLC decoders */
205 int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
206 {
207  int len, index, i, class, n, v, code_max;
208  uint8_t bits_table[17];
209  uint8_t val_table[256];
210  int ret = 0;
211 
212  len = get_bits(&s->gb, 16) - 2;
213 
214  if (8*len > get_bits_left(&s->gb)) {
215  av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
216  return AVERROR_INVALIDDATA;
217  }
218 
219  while (len > 0) {
220  if (len < 17)
221  return AVERROR_INVALIDDATA;
222  class = get_bits(&s->gb, 4);
223  if (class >= 2)
224  return AVERROR_INVALIDDATA;
225  index = get_bits(&s->gb, 4);
226  if (index >= 4)
227  return AVERROR_INVALIDDATA;
228  n = 0;
229  for (i = 1; i <= 16; i++) {
230  bits_table[i] = get_bits(&s->gb, 8);
231  n += bits_table[i];
232  }
233  len -= 17;
234  if (len < n || n > 256)
235  return AVERROR_INVALIDDATA;
236 
237  code_max = 0;
238  for (i = 0; i < n; i++) {
239  v = get_bits(&s->gb, 8);
240  if (v > code_max)
241  code_max = v;
242  val_table[i] = v;
243  }
244  len -= n;
245 
246  /* build VLC and flush previous vlc if present */
247  ff_free_vlc(&s->vlcs[class][index]);
248  av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
249  class, index, code_max + 1);
250  if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
251  code_max + 1, 0, class > 0)) < 0)
252  return ret;
253 
254  if (class > 0) {
255  ff_free_vlc(&s->vlcs[2][index]);
256  if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
257  code_max + 1, 0, 0)) < 0)
258  return ret;
259  }
260  }
261  return 0;
262 }
263 
264 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
265 {
266  int len, nb_components, i, width, height, bits, ret;
267  unsigned pix_fmt_id;
268  int h_count[MAX_COMPONENTS] = { 0 };
269  int v_count[MAX_COMPONENTS] = { 0 };
270 
271  s->cur_scan = 0;
272  memset(s->upscale_h, 0, sizeof(s->upscale_h));
273  memset(s->upscale_v, 0, sizeof(s->upscale_v));
274 
275  /* XXX: verify len field validity */
276  len = get_bits(&s->gb, 16);
277  bits = get_bits(&s->gb, 8);
278 
279  if (bits > 16 || bits < 1) {
280  av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
281  return AVERROR_INVALIDDATA;
282  }
283 
284  if (s->avctx->bits_per_raw_sample != bits) {
285  av_log(s->avctx, AV_LOG_INFO, "Changing bps to %d\n", bits);
286  s->avctx->bits_per_raw_sample = bits;
287  init_idct(s->avctx);
288  }
289  if (s->pegasus_rct)
290  bits = 9;
291  if (bits == 9 && !s->pegasus_rct)
292  s->rct = 1; // FIXME ugly
293 
294  if(s->lossless && s->avctx->lowres){
295  av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
296  return -1;
297  }
298 
299  height = get_bits(&s->gb, 16);
300  width = get_bits(&s->gb, 16);
301 
302  // HACK for odd_height.mov
303  if (s->interlaced && s->width == width && s->height == height + 1)
304  height= s->height;
305 
306  av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
307  if (av_image_check_size(width, height, 0, s->avctx))
308  return AVERROR_INVALIDDATA;
309 
310  nb_components = get_bits(&s->gb, 8);
311  if (nb_components <= 0 ||
312  nb_components > MAX_COMPONENTS)
313  return -1;
314  if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
315  if (nb_components != s->nb_components) {
316  av_log(s->avctx, AV_LOG_ERROR,
317  "nb_components changing in interlaced picture\n");
318  return AVERROR_INVALIDDATA;
319  }
320  }
321  if (s->ls && !(bits <= 8 || nb_components == 1)) {
322  avpriv_report_missing_feature(s->avctx,
323  "JPEG-LS that is not <= 8 "
324  "bits/component or 16-bit gray");
325  return AVERROR_PATCHWELCOME;
326  }
327  s->nb_components = nb_components;
328  s->h_max = 1;
329  s->v_max = 1;
330  for (i = 0; i < nb_components; i++) {
331  /* component id */
332  s->component_id[i] = get_bits(&s->gb, 8) - 1;
333  h_count[i] = get_bits(&s->gb, 4);
334  v_count[i] = get_bits(&s->gb, 4);
335  /* compute hmax and vmax (only used in interleaved case) */
336  if (h_count[i] > s->h_max)
337  s->h_max = h_count[i];
338  if (v_count[i] > s->v_max)
339  s->v_max = v_count[i];
340  s->quant_index[i] = get_bits(&s->gb, 8);
341  if (s->quant_index[i] >= 4) {
342  av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
343  return AVERROR_INVALIDDATA;
344  }
345  if (!h_count[i] || !v_count[i]) {
346  av_log(s->avctx, AV_LOG_ERROR,
347  "Invalid sampling factor in component %d %d:%d\n",
348  i, h_count[i], v_count[i]);
349  return AVERROR_INVALIDDATA;
350  }
351 
352  av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
353  i, h_count[i], v_count[i],
354  s->component_id[i], s->quant_index[i]);
355  }
356  if ( nb_components == 4
357  && s->component_id[0] == 'C' - 1
358  && s->component_id[1] == 'M' - 1
359  && s->component_id[2] == 'Y' - 1
360  && s->component_id[3] == 'K' - 1)
361  s->adobe_transform = 0;
362 
363  if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
364  avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
365  return AVERROR_PATCHWELCOME;
366  }
367 
368 
369  /* if different size, realloc/alloc picture */
370  if (width != s->width || height != s->height || bits != s->bits ||
371  memcmp(s->h_count, h_count, sizeof(h_count)) ||
372  memcmp(s->v_count, v_count, sizeof(v_count))) {
373 
374  s->width = width;
375  s->height = height;
376  s->bits = bits;
377  memcpy(s->h_count, h_count, sizeof(h_count));
378  memcpy(s->v_count, v_count, sizeof(v_count));
379  s->interlaced = 0;
380  s->got_picture = 0;
381 
382  /* test interlaced mode */
383  if (s->first_picture &&
384  (s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
385  s->org_height != 0 &&
386  s->height < ((s->org_height * 3) / 4)) {
387  s->interlaced = 1;
388  s->bottom_field = s->interlace_polarity;
389  s->picture_ptr->interlaced_frame = 1;
390  s->picture_ptr->top_field_first = !s->interlace_polarity;
391  height *= 2;
392  }
393 
394  ret = ff_set_dimensions(s->avctx, width, height);
395  if (ret < 0)
396  return ret;
397 
398  s->first_picture = 0;
399  }
400 
401  if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
402  if (s->progressive) {
403  avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
404  return AVERROR_INVALIDDATA;
405  }
406  } else{
407  if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
408  s->rgb = 1;
409  else if (!s->lossless)
410  s->rgb = 0;
411  /* XXX: not complete test ! */
412  pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
413  (s->h_count[1] << 20) | (s->v_count[1] << 16) |
414  (s->h_count[2] << 12) | (s->v_count[2] << 8) |
415  (s->h_count[3] << 4) | s->v_count[3];
416  av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
417  /* NOTE we do not allocate pictures large enough for the possible
418  * padding of h/v_count being 4 */
419  if (!(pix_fmt_id & 0xD0D0D0D0))
420  pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
421  if (!(pix_fmt_id & 0x0D0D0D0D))
422  pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
423 
424  for (i = 0; i < 8; i++) {
425  int j = 6 + (i&1) - (i&6);
426  int is = (pix_fmt_id >> (4*i)) & 0xF;
427  int js = (pix_fmt_id >> (4*j)) & 0xF;
428 
429  if (is == 1 && js != 2 && (i < 2 || i > 5))
430  js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
431  if (is == 1 && js != 2 && (i < 2 || i > 5))
432  js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
433 
434  if (is == 1 && js == 2) {
435  if (i & 1) s->upscale_h[j/2] = 1;
436  else s->upscale_v[j/2] = 1;
437  }
438  }
439 
440  switch (pix_fmt_id) {
441  case 0x11111100:
442  if (s->rgb)
443  s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
444  else {
445  if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
446  s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
447  } else {
448  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
449  else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
450  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
451  }
452  }
453  av_assert0(s->nb_components == 3);
454  break;
455  case 0x11111111:
456  if (s->rgb)
457  s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
458  else {
459  if (s->adobe_transform == 0 && s->bits <= 8) {
460  s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
461  } else {
462  s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
463  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
464  }
465  }
466  av_assert0(s->nb_components == 4);
467  break;
468  case 0x22111122:
469  case 0x22111111:
470  if (s->adobe_transform == 0 && s->bits <= 8) {
471  s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
472  s->upscale_v[1] = s->upscale_v[2] = 1;
473  s->upscale_h[1] = s->upscale_h[2] = 1;
474  } else if (s->adobe_transform == 2 && s->bits <= 8) {
475  s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
476  s->upscale_v[1] = s->upscale_v[2] = 1;
477  s->upscale_h[1] = s->upscale_h[2] = 1;
478  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
479  } else {
480  if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
481  else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
482  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
483  }
484  av_assert0(s->nb_components == 4);
485  break;
486  case 0x12121100:
487  case 0x22122100:
488  case 0x21211100:
489  case 0x22211200:
490  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
491  else
492  goto unk_pixfmt;
493  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
494  break;
495  case 0x22221100:
496  case 0x22112200:
497  case 0x11222200:
498  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
499  else
500  goto unk_pixfmt;
501  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
502  break;
503  case 0x11000000:
504  case 0x13000000:
505  case 0x14000000:
506  case 0x31000000:
507  case 0x33000000:
508  case 0x34000000:
509  case 0x41000000:
510  case 0x43000000:
511  case 0x44000000:
512  if(s->bits <= 8)
513  s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
514  else
515  s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
516  break;
517  case 0x12111100:
518  case 0x14121200:
519  case 0x14111100:
520  case 0x22211100:
521  case 0x22112100:
522  if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
523  if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
524  else
525  goto unk_pixfmt;
526  s->upscale_v[0] = s->upscale_v[1] = 1;
527  } else {
528  if (pix_fmt_id == 0x14111100)
529  s->upscale_v[1] = s->upscale_v[2] = 1;
530  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
531  else
532  goto unk_pixfmt;
533  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
534  }
535  break;
536  case 0x21111100:
537  if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
538  if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
539  else
540  goto unk_pixfmt;
541  s->upscale_h[0] = s->upscale_h[1] = 1;
542  } else {
543  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
544  else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
545  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
546  }
547  break;
548  case 0x31111100:
549  if (s->bits > 8)
550  goto unk_pixfmt;
551  s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
552  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
553  s->upscale_h[1] = s->upscale_h[2] = 2;
554  break;
555  case 0x22121100:
556  case 0x22111200:
557  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
558  else
559  goto unk_pixfmt;
560  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
561  break;
562  case 0x22111100:
563  case 0x42111100:
564  case 0x24111100:
565  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
566  else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
567  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
568  if (pix_fmt_id == 0x42111100) {
569  if (s->bits > 8)
570  goto unk_pixfmt;
571  s->upscale_h[1] = s->upscale_h[2] = 1;
572  } else if (pix_fmt_id == 0x24111100) {
573  if (s->bits > 8)
574  goto unk_pixfmt;
575  s->upscale_v[1] = s->upscale_v[2] = 1;
576  }
577  break;
578  case 0x41111100:
579  if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
580  else
581  goto unk_pixfmt;
582  s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
583  break;
584  default:
585 unk_pixfmt:
586  av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
587  memset(s->upscale_h, 0, sizeof(s->upscale_h));
588  memset(s->upscale_v, 0, sizeof(s->upscale_v));
589  return AVERROR_PATCHWELCOME;
590  }
591  if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
592  av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
593  return AVERROR_PATCHWELCOME;
594  }
595  if (s->ls) {
596  memset(s->upscale_h, 0, sizeof(s->upscale_h));
597  memset(s->upscale_v, 0, sizeof(s->upscale_v));
598  if (s->nb_components == 3) {
599  s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
600  } else if (s->nb_components != 1) {
601  av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
602  return AVERROR_PATCHWELCOME;
603  } else if (s->palette_index && s->bits <= 8)
604  s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
605  else if (s->bits <= 8)
606  s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
607  else
608  s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
609  }
610 
611  s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
612  if (!s->pix_desc) {
613  av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
614  return AVERROR_BUG;
615  }
616 
617  av_frame_unref(s->picture_ptr);
618  if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
619  return -1;
620  s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
621  s->picture_ptr->key_frame = 1;
622  s->got_picture = 1;
623 
624  for (i = 0; i < 4; i++)
625  s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
626 
627  ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
628  s->width, s->height, s->linesize[0], s->linesize[1],
629  s->interlaced, s->avctx->height);
630 
631  if (len != (8 + (3 * nb_components)))
632  av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
633  }
634 
635  if ((s->rgb && !s->lossless && !s->ls) ||
636  (!s->rgb && s->ls && s->nb_components > 1)) {
637  av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
638  return AVERROR_PATCHWELCOME;
639  }
640 
641  /* totally blank picture as progressive JPEG will only add details to it */
642  if (s->progressive) {
643  int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
644  int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
645  for (i = 0; i < s->nb_components; i++) {
646  int size = bw * bh * s->h_count[i] * s->v_count[i];
647  av_freep(&s->blocks[i]);
648  av_freep(&s->last_nnz[i]);
649  s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
650  s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
651  if (!s->blocks[i] || !s->last_nnz[i])
652  return AVERROR(ENOMEM);
653  s->block_stride[i] = bw * s->h_count[i];
654  }
655  memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
656  }
657  return 0;
658 }
659 
660 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
661 {
662  int code;
663  code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
664  if (code < 0 || code > 16) {
665  av_log(s->avctx, AV_LOG_WARNING,
666  "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
667  0, dc_index, &s->vlcs[0][dc_index]);
668  return 0xfffff;
669  }
670 
671  if (code)
672  return get_xbits(&s->gb, code);
673  else
674  return 0;
675 }
676 
677 /* decode block and dequantize */
678 static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
679  int dc_index, int ac_index, int16_t *quant_matrix)
680 {
681  int code, i, j, level, val;
682 
683  /* DC coef */
684  val = mjpeg_decode_dc(s, dc_index);
685  if (val == 0xfffff) {
686  av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
687  return AVERROR_INVALIDDATA;
688  }
689  val = val * quant_matrix[0] + s->last_dc[component];
690  val = FFMIN(val, 32767);
691  s->last_dc[component] = val;
692  block[0] = val;
693  /* AC coefs */
694  i = 0;
695  {OPEN_READER(re, &s->gb);
696  do {
697  UPDATE_CACHE(re, &s->gb);
698  GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
699 
700  i += ((unsigned)code) >> 4;
701  code &= 0xf;
702  if (code) {
703  if (code > MIN_CACHE_BITS - 16)
704  UPDATE_CACHE(re, &s->gb);
705 
706  {
707  int cache = GET_CACHE(re, &s->gb);
708  int sign = (~cache) >> 31;
709  level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
710  }
711 
712  LAST_SKIP_BITS(re, &s->gb, code);
713 
714  if (i > 63) {
715  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
716  return AVERROR_INVALIDDATA;
717  }
718  j = s->scantable.permutated[i];
719  block[j] = level * quant_matrix[j];
720  }
721  } while (i < 63);
722  CLOSE_READER(re, &s->gb);}
723 
724  return 0;
725 }
726 
727 static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block,
728  int component, int dc_index,
729  int16_t *quant_matrix, int Al)
730 {
731  int val;
732  s->bdsp.clear_block(block);
733  val = mjpeg_decode_dc(s, dc_index);
734  if (val == 0xfffff) {
735  av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
736  return AVERROR_INVALIDDATA;
737  }
738  val = (val * (quant_matrix[0] << Al)) + s->last_dc[component];
739  s->last_dc[component] = val;
740  block[0] = val;
741  return 0;
742 }
743 
744 /* decode block and dequantize - progressive JPEG version */
745 static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block,
746  uint8_t *last_nnz, int ac_index,
747  int16_t *quant_matrix,
748  int ss, int se, int Al, int *EOBRUN)
749 {
750  int code, i, j, level, val, run;
751 
752  if (*EOBRUN) {
753  (*EOBRUN)--;
754  return 0;
755  }
756 
757  {
758  OPEN_READER(re, &s->gb);
759  for (i = ss; ; i++) {
760  UPDATE_CACHE(re, &s->gb);
761  GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
762 
763  run = ((unsigned) code) >> 4;
764  code &= 0xF;
765  if (code) {
766  i += run;
767  if (code > MIN_CACHE_BITS - 16)
768  UPDATE_CACHE(re, &s->gb);
769 
770  {
771  int cache = GET_CACHE(re, &s->gb);
772  int sign = (~cache) >> 31;
773  level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
774  }
775 
776  LAST_SKIP_BITS(re, &s->gb, code);
777 
778  if (i >= se) {
779  if (i == se) {
780  j = s->scantable.permutated[se];
781  block[j] = level * (quant_matrix[j] << Al);
782  break;
783  }
784  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
785  return AVERROR_INVALIDDATA;
786  }
787  j = s->scantable.permutated[i];
788  block[j] = level * (quant_matrix[j] << Al);
789  } else {
790  if (run == 0xF) {// ZRL - skip 15 coefficients
791  i += 15;
792  if (i >= se) {
793  av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
794  return AVERROR_INVALIDDATA;
795  }
796  } else {
797  val = (1 << run);
798  if (run) {
799  UPDATE_CACHE(re, &s->gb);
800  val += NEG_USR32(GET_CACHE(re, &s->gb), run);
801  LAST_SKIP_BITS(re, &s->gb, run);
802  }
803  *EOBRUN = val - 1;
804  break;
805  }
806  }
807  }
808  CLOSE_READER(re, &s->gb);
809  }
810 
811  if (i > *last_nnz)
812  *last_nnz = i;
813 
814  return 0;
815 }
816 
817 #define REFINE_BIT(j) { \
818  UPDATE_CACHE(re, &s->gb); \
819  sign = block[j] >> 15; \
820  block[j] += SHOW_UBITS(re, &s->gb, 1) * \
821  ((quant_matrix[j] ^ sign) - sign) << Al; \
822  LAST_SKIP_BITS(re, &s->gb, 1); \
823 }
824 
825 #define ZERO_RUN \
826 for (; ; i++) { \
827  if (i > last) { \
828  i += run; \
829  if (i > se) { \
830  av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
831  return -1; \
832  } \
833  break; \
834  } \
835  j = s->scantable.permutated[i]; \
836  if (block[j]) \
837  REFINE_BIT(j) \
838  else if (run-- == 0) \
839  break; \
840 }
841 
842 /* decode block and dequantize - progressive JPEG refinement pass */
843 static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
844  uint8_t *last_nnz,
845  int ac_index, int16_t *quant_matrix,
846  int ss, int se, int Al, int *EOBRUN)
847 {
848  int code, i = ss, j, sign, val, run;
849  int last = FFMIN(se, *last_nnz);
850 
851  OPEN_READER(re, &s->gb);
852  if (*EOBRUN) {
853  (*EOBRUN)--;
854  } else {
855  for (; ; i++) {
856  UPDATE_CACHE(re, &s->gb);
857  GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
858 
859  if (code & 0xF) {
860  run = ((unsigned) code) >> 4;
861  UPDATE_CACHE(re, &s->gb);
862  val = SHOW_UBITS(re, &s->gb, 1);
863  LAST_SKIP_BITS(re, &s->gb, 1);
864  ZERO_RUN;
865  j = s->scantable.permutated[i];
866  val--;
867  block[j] = ((quant_matrix[j] << Al) ^ val) - val;
868  if (i == se) {
869  if (i > *last_nnz)
870  *last_nnz = i;
871  CLOSE_READER(re, &s->gb);
872  return 0;
873  }
874  } else {
875  run = ((unsigned) code) >> 4;
876  if (run == 0xF) {
877  ZERO_RUN;
878  } else {
879  val = run;
880  run = (1 << run);
881  if (val) {
882  UPDATE_CACHE(re, &s->gb);
883  run += SHOW_UBITS(re, &s->gb, val);
884  LAST_SKIP_BITS(re, &s->gb, val);
885  }
886  *EOBRUN = run - 1;
887  break;
888  }
889  }
890  }
891 
892  if (i > *last_nnz)
893  *last_nnz = i;
894  }
895 
896  for (; i <= last; i++) {
897  j = s->scantable.permutated[i];
898  if (block[j])
899  REFINE_BIT(j)
900  }
901  CLOSE_READER(re, &s->gb);
902 
903  return 0;
904 }
905 #undef REFINE_BIT
906 #undef ZERO_RUN
907 
908 static int handle_rstn(MJpegDecodeContext *s, int nb_components)
909 {
910  int i;
911  int reset = 0;
912 
913  if (s->restart_interval) {
914  s->restart_count--;
915  if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
916  align_get_bits(&s->gb);
917  for (i = 0; i < nb_components; i++) /* reset dc */
918  s->last_dc[i] = (4 << s->bits);
919  }
920 
921  i = 8 + ((-get_bits_count(&s->gb)) & 7);
922  /* skip RSTn */
923  if (s->restart_count == 0) {
924  if( show_bits(&s->gb, i) == (1 << i) - 1
925  || show_bits(&s->gb, i) == 0xFF) {
926  int pos = get_bits_count(&s->gb);
927  align_get_bits(&s->gb);
928  while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
929  skip_bits(&s->gb, 8);
930  if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
931  for (i = 0; i < nb_components; i++) /* reset dc */
932  s->last_dc[i] = (4 << s->bits);
933  reset = 1;
934  } else
935  skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
936  }
937  }
938  }
939  return reset;
940 }
941 
942 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
943 {
944  int i, mb_x, mb_y;
945  uint16_t (*buffer)[4];
946  int left[4], top[4], topleft[4];
947  const int linesize = s->linesize[0];
948  const int mask = ((1 << s->bits) - 1) << point_transform;
949  int resync_mb_y = 0;
950  int resync_mb_x = 0;
951 
952  if (s->nb_components != 3 && s->nb_components != 4)
953  return AVERROR_INVALIDDATA;
954  if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
955  return AVERROR_INVALIDDATA;
956 
957 
958  s->restart_count = s->restart_interval;
959 
960  av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
961  (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
962  buffer = s->ljpeg_buffer;
963 
964  for (i = 0; i < 4; i++)
965  buffer[0][i] = 1 << (s->bits - 1);
966 
967  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
968  uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
969 
970  if (s->interlaced && s->bottom_field)
971  ptr += linesize >> 1;
972 
973  for (i = 0; i < 4; i++)
974  top[i] = left[i] = topleft[i] = buffer[0][i];
975 
976  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
977  int modified_predictor = predictor;
978 
979  if (s->restart_interval && !s->restart_count){
980  s->restart_count = s->restart_interval;
981  resync_mb_x = mb_x;
982  resync_mb_y = mb_y;
983  for(i=0; i<4; i++)
984  top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
985  }
986  if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
987  modified_predictor = 1;
988 
989  for (i=0;i<nb_components;i++) {
990  int pred, dc;
991 
992  topleft[i] = top[i];
993  top[i] = buffer[mb_x][i];
994 
995  PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
996 
997  dc = mjpeg_decode_dc(s, s->dc_index[i]);
998  if(dc == 0xFFFFF)
999  return -1;
1000 
1001  left[i] = buffer[mb_x][i] =
1002  mask & (pred + (dc * (1 << point_transform)));
1003  }
1004 
1005  if (s->restart_interval && !--s->restart_count) {
1006  align_get_bits(&s->gb);
1007  skip_bits(&s->gb, 16); /* skip RSTn */
1008  }
1009  }
1010  if (s->rct && s->nb_components == 4) {
1011  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1012  ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1013  ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
1014  ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
1015  ptr[4*mb_x + 0] = buffer[mb_x][3];
1016  }
1017  } else if (s->nb_components == 4) {
1018  for(i=0; i<nb_components; i++) {
1019  int c= s->comp_index[i];
1020  if (s->bits <= 8) {
1021  for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1022  ptr[4*mb_x+3-c] = buffer[mb_x][i];
1023  }
1024  } else if(s->bits == 9) {
1025  return AVERROR_PATCHWELCOME;
1026  } else {
1027  for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1028  ((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
1029  }
1030  }
1031  }
1032  } else if (s->rct) {
1033  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1034  ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
1035  ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1036  ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1037  }
1038  } else if (s->pegasus_rct) {
1039  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1040  ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
1041  ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
1042  ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
1043  }
1044  } else {
1045  for(i=0; i<nb_components; i++) {
1046  int c= s->comp_index[i];
1047  if (s->bits <= 8) {
1048  for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1049  ptr[3*mb_x+2-c] = buffer[mb_x][i];
1050  }
1051  } else if(s->bits == 9) {
1052  return AVERROR_PATCHWELCOME;
1053  } else {
1054  for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1055  ((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
1056  }
1057  }
1058  }
1059  }
1060  }
1061  return 0;
1062 }
1063 
1064 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
1065  int point_transform, int nb_components)
1066 {
1067  int i, mb_x, mb_y, mask;
1068  int bits= (s->bits+7)&~7;
1069  int resync_mb_y = 0;
1070  int resync_mb_x = 0;
1071 
1072  point_transform += bits - s->bits;
1073  mask = ((1 << s->bits) - 1) << point_transform;
1074 
1075  av_assert0(nb_components>=1 && nb_components<=4);
1076 
1077  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1078  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1079  if (s->restart_interval && !s->restart_count){
1080  s->restart_count = s->restart_interval;
1081  resync_mb_x = mb_x;
1082  resync_mb_y = mb_y;
1083  }
1084 
1085  if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
1086  int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
1087  int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
1088  for (i = 0; i < nb_components; i++) {
1089  uint8_t *ptr;
1090  uint16_t *ptr16;
1091  int n, h, v, x, y, c, j, linesize;
1092  n = s->nb_blocks[i];
1093  c = s->comp_index[i];
1094  h = s->h_scount[i];
1095  v = s->v_scount[i];
1096  x = 0;
1097  y = 0;
1098  linesize= s->linesize[c];
1099 
1100  if(bits>8) linesize /= 2;
1101 
1102  for(j=0; j<n; j++) {
1103  int pred, dc;
1104 
1105  dc = mjpeg_decode_dc(s, s->dc_index[i]);
1106  if(dc == 0xFFFFF)
1107  return -1;
1108  if ( h * mb_x + x >= s->width
1109  || v * mb_y + y >= s->height) {
1110  // Nothing to do
1111  } else if (bits<=8) {
1112  ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1113  if(y==0 && toprow){
1114  if(x==0 && leftcol){
1115  pred= 1 << (bits - 1);
1116  }else{
1117  pred= ptr[-1];
1118  }
1119  }else{
1120  if(x==0 && leftcol){
1121  pred= ptr[-linesize];
1122  }else{
1123  PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1124  }
1125  }
1126 
1127  if (s->interlaced && s->bottom_field)
1128  ptr += linesize >> 1;
1129  pred &= mask;
1130  *ptr= pred + (dc << point_transform);
1131  }else{
1132  ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1133  if(y==0 && toprow){
1134  if(x==0 && leftcol){
1135  pred= 1 << (bits - 1);
1136  }else{
1137  pred= ptr16[-1];
1138  }
1139  }else{
1140  if(x==0 && leftcol){
1141  pred= ptr16[-linesize];
1142  }else{
1143  PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1144  }
1145  }
1146 
1147  if (s->interlaced && s->bottom_field)
1148  ptr16 += linesize >> 1;
1149  pred &= mask;
1150  *ptr16= pred + (dc << point_transform);
1151  }
1152  if (++x == h) {
1153  x = 0;
1154  y++;
1155  }
1156  }
1157  }
1158  } else {
1159  for (i = 0; i < nb_components; i++) {
1160  uint8_t *ptr;
1161  uint16_t *ptr16;
1162  int n, h, v, x, y, c, j, linesize, dc;
1163  n = s->nb_blocks[i];
1164  c = s->comp_index[i];
1165  h = s->h_scount[i];
1166  v = s->v_scount[i];
1167  x = 0;
1168  y = 0;
1169  linesize = s->linesize[c];
1170 
1171  if(bits>8) linesize /= 2;
1172 
1173  for (j = 0; j < n; j++) {
1174  int pred;
1175 
1176  dc = mjpeg_decode_dc(s, s->dc_index[i]);
1177  if(dc == 0xFFFFF)
1178  return -1;
1179  if ( h * mb_x + x >= s->width
1180  || v * mb_y + y >= s->height) {
1181  // Nothing to do
1182  } else if (bits<=8) {
1183  ptr = s->picture_ptr->data[c] +
1184  (linesize * (v * mb_y + y)) +
1185  (h * mb_x + x); //FIXME optimize this crap
1186  PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1187 
1188  pred &= mask;
1189  *ptr = pred + (dc << point_transform);
1190  }else{
1191  ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
1192  PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
1193 
1194  pred &= mask;
1195  *ptr16= pred + (dc << point_transform);
1196  }
1197 
1198  if (++x == h) {
1199  x = 0;
1200  y++;
1201  }
1202  }
1203  }
1204  }
1205  if (s->restart_interval && !--s->restart_count) {
1206  align_get_bits(&s->gb);
1207  skip_bits(&s->gb, 16); /* skip RSTn */
1208  }
1209  }
1210  }
1211  return 0;
1212 }
1213 
1214 static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
1215  uint8_t *dst, const uint8_t *src,
1216  int linesize, int lowres)
1217 {
1218  switch (lowres) {
1219  case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
1220  break;
1221  case 1: copy_block4(dst, src, linesize, linesize, 4);
1222  break;
1223  case 2: copy_block2(dst, src, linesize, linesize, 2);
1224  break;
1225  case 3: *dst = *src;
1226  break;
1227  }
1228 }
1229 
1230 static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
1231 {
1232  int block_x, block_y;
1233  int size = 8 >> s->avctx->lowres;
1234  if (s->bits > 8) {
1235  for (block_y=0; block_y<size; block_y++)
1236  for (block_x=0; block_x<size; block_x++)
1237  *(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
1238  } else {
1239  for (block_y=0; block_y<size; block_y++)
1240  for (block_x=0; block_x<size; block_x++)
1241  *(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
1242  }
1243 }
1244 
1245 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
1246  int Al, const uint8_t *mb_bitmask,
1247  int mb_bitmask_size,
1248  const AVFrame *reference)
1249 {
1250  int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
1251  uint8_t *data[MAX_COMPONENTS];
1252  const uint8_t *reference_data[MAX_COMPONENTS];
1253  int linesize[MAX_COMPONENTS];
1254  GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
1255  int bytes_per_pixel = 1 + (s->bits > 8);
1256 
1257  if (mb_bitmask) {
1258  if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
1259  av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
1260  return AVERROR_INVALIDDATA;
1261  }
1262  init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
1263  }
1264 
1265  s->restart_count = 0;
1266 
1267  av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
1268  &chroma_v_shift);
1269  chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
1270  chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
1271 
1272  for (i = 0; i < nb_components; i++) {
1273  int c = s->comp_index[i];
1274  data[c] = s->picture_ptr->data[c];
1275  reference_data[c] = reference ? reference->data[c] : NULL;
1276  linesize[c] = s->linesize[c];
1277  s->coefs_finished[c] |= 1;
1278  }
1279 
1280  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1281  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1282  const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
1283 
1284  if (s->restart_interval && !s->restart_count)
1285  s->restart_count = s->restart_interval;
1286 
1287  if (get_bits_left(&s->gb) < 0) {
1288  av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
1289  -get_bits_left(&s->gb));
1290  return AVERROR_INVALIDDATA;
1291  }
1292  for (i = 0; i < nb_components; i++) {
1293  uint8_t *ptr;
1294  int n, h, v, x, y, c, j;
1295  int block_offset;
1296  n = s->nb_blocks[i];
1297  c = s->comp_index[i];
1298  h = s->h_scount[i];
1299  v = s->v_scount[i];
1300  x = 0;
1301  y = 0;
1302  for (j = 0; j < n; j++) {
1303  block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
1304  (h * mb_x + x) * 8 * bytes_per_pixel) >> s->avctx->lowres);
1305 
1306  if (s->interlaced && s->bottom_field)
1307  block_offset += linesize[c] >> 1;
1308  if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
1309  && 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
1310  ptr = data[c] + block_offset;
1311  } else
1312  ptr = NULL;
1313  if (!s->progressive) {
1314  if (copy_mb) {
1315  if (ptr)
1316  mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
1317  linesize[c], s->avctx->lowres);
1318 
1319  } else {
1320  s->bdsp.clear_block(s->block);
1321  if (decode_block(s, s->block, i,
1322  s->dc_index[i], s->ac_index[i],
1323  s->quant_matrixes[s->quant_sindex[i]]) < 0) {
1324  av_log(s->avctx, AV_LOG_ERROR,
1325  "error y=%d x=%d\n", mb_y, mb_x);
1326  return AVERROR_INVALIDDATA;
1327  }
1328  if (ptr) {
1329  s->idsp.idct_put(ptr, linesize[c], s->block);
1330  if (s->bits & 7)
1331  shift_output(s, ptr, linesize[c]);
1332  }
1333  }
1334  } else {
1335  int block_idx = s->block_stride[c] * (v * mb_y + y) +
1336  (h * mb_x + x);
1337  int16_t *block = s->blocks[c][block_idx];
1338  if (Ah)
1339  block[0] += get_bits1(&s->gb) *
1340  s->quant_matrixes[s->quant_sindex[i]][0] << Al;
1341  else if (decode_dc_progressive(s, block, i, s->dc_index[i],
1342  s->quant_matrixes[s->quant_sindex[i]],
1343  Al) < 0) {
1344  av_log(s->avctx, AV_LOG_ERROR,
1345  "error y=%d x=%d\n", mb_y, mb_x);
1346  return AVERROR_INVALIDDATA;
1347  }
1348  }
1349  ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
1350  ff_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n",
1351  mb_x, mb_y, x, y, c, s->bottom_field,
1352  (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1353  if (++x == h) {
1354  x = 0;
1355  y++;
1356  }
1357  }
1358  }
1359 
1360  handle_rstn(s, nb_components);
1361  }
1362  }
1363  return 0;
1364 }
1365 
1366 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
1367  int se, int Ah, int Al)
1368 {
1369  int mb_x, mb_y;
1370  int EOBRUN = 0;
1371  int c = s->comp_index[0];
1372  uint8_t *data = s->picture_ptr->data[c];
1373  int linesize = s->linesize[c];
1374  int last_scan = 0;
1375  int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
1376  int bytes_per_pixel = 1 + (s->bits > 8);
1377 
1378  av_assert0(ss>=0 && Ah>=0 && Al>=0);
1379  if (se < ss || se > 63) {
1380  av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
1381  return AVERROR_INVALIDDATA;
1382  }
1383 
1384  if (!Al) {
1385  // s->coefs_finished is a bitmask for coefficients coded
1386  // ss and se are parameters telling start and end coefficients
1387  s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
1388  last_scan = !~s->coefs_finished[c];
1389  }
1390 
1391  if (s->interlaced && s->bottom_field)
1392  data += linesize >> 1;
1393 
1394  s->restart_count = 0;
1395 
1396  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1397  uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
1398  int block_idx = mb_y * s->block_stride[c];
1399  int16_t (*block)[64] = &s->blocks[c][block_idx];
1400  uint8_t *last_nnz = &s->last_nnz[c][block_idx];
1401  for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
1402  int ret;
1403  if (s->restart_interval && !s->restart_count)
1404  s->restart_count = s->restart_interval;
1405 
1406  if (Ah)
1407  ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
1408  quant_matrix, ss, se, Al, &EOBRUN);
1409  else
1410  ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
1411  quant_matrix, ss, se, Al, &EOBRUN);
1412  if (ret < 0) {
1413  av_log(s->avctx, AV_LOG_ERROR,
1414  "error y=%d x=%d\n", mb_y, mb_x);
1415  return AVERROR_INVALIDDATA;
1416  }
1417 
1418  if (last_scan) {
1419  s->idsp.idct_put(ptr, linesize, *block);
1420  if (s->bits & 7)
1421  shift_output(s, ptr, linesize);
1422  ptr += bytes_per_pixel*8 >> s->avctx->lowres;
1423  }
1424  if (handle_rstn(s, 0))
1425  EOBRUN = 0;
1426  }
1427  }
1428  return 0;
1429 }
1430 
1431 int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
1432  int mb_bitmask_size, const AVFrame *reference)
1433 {
1434  int len, nb_components, i, h, v, predictor, point_transform;
1435  int index, id, ret;
1436  const int block_size = s->lossless ? 1 : 8;
1437  int ilv, prev_shift;
1438 
1439  if (!s->got_picture) {
1440  av_log(s->avctx, AV_LOG_WARNING,
1441  "Can not process SOS before SOF, skipping\n");
1442  return -1;
1443  }
1444 
1445  av_assert0(s->picture_ptr->data[0]);
1446  /* XXX: verify len field validity */
1447  len = get_bits(&s->gb, 16);
1448  nb_components = get_bits(&s->gb, 8);
1449  if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
1450  av_log(s->avctx, AV_LOG_ERROR,
1451  "decode_sos: nb_components (%d) unsupported\n", nb_components);
1452  return AVERROR_PATCHWELCOME;
1453  }
1454  if (len != 6 + 2 * nb_components) {
1455  av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
1456  return AVERROR_INVALIDDATA;
1457  }
1458  for (i = 0; i < nb_components; i++) {
1459  id = get_bits(&s->gb, 8) - 1;
1460  av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
1461  /* find component index */
1462  for (index = 0; index < s->nb_components; index++)
1463  if (id == s->component_id[index])
1464  break;
1465  if (index == s->nb_components) {
1466  av_log(s->avctx, AV_LOG_ERROR,
1467  "decode_sos: index(%d) out of components\n", index);
1468  return AVERROR_INVALIDDATA;
1469  }
1470  /* Metasoft MJPEG codec has Cb and Cr swapped */
1471  if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
1472  && nb_components == 3 && s->nb_components == 3 && i)
1473  index = 3 - i;
1474 
1475  s->quant_sindex[i] = s->quant_index[index];
1476  s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1477  s->h_scount[i] = s->h_count[index];
1478  s->v_scount[i] = s->v_count[index];
1479 
1480  if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1481  index = (i+2)%3;
1482  if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
1483  index = (index+2)%3;
1484 
1485  s->comp_index[i] = index;
1486 
1487  s->dc_index[i] = get_bits(&s->gb, 4);
1488  s->ac_index[i] = get_bits(&s->gb, 4);
1489 
1490  if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1491  s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1492  goto out_of_range;
1493  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))
1494  goto out_of_range;
1495  }
1496 
1497  predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1498  ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1499  if(s->avctx->codec_tag != AV_RL32("CJPG")){
1500  prev_shift = get_bits(&s->gb, 4); /* Ah */
1501  point_transform = get_bits(&s->gb, 4); /* Al */
1502  }else
1503  prev_shift = point_transform = 0;
1504 
1505  if (nb_components > 1) {
1506  /* interleaved stream */
1507  s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1508  s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1509  } else if (!s->ls) { /* skip this for JPEG-LS */
1510  h = s->h_max / s->h_scount[0];
1511  v = s->v_max / s->v_scount[0];
1512  s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1513  s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1514  s->nb_blocks[0] = 1;
1515  s->h_scount[0] = 1;
1516  s->v_scount[0] = 1;
1517  }
1518 
1519  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1520  av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
1521  s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
1522  predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
1523  s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
1524 
1525 
1526  /* mjpeg-b can have padding bytes between sos and image data, skip them */
1527  for (i = s->mjpb_skiptosod; i > 0; i--)
1528  skip_bits(&s->gb, 8);
1529 
1530 next_field:
1531  for (i = 0; i < nb_components; i++)
1532  s->last_dc[i] = (4 << s->bits);
1533 
1534  if (s->lossless) {
1535  av_assert0(s->picture_ptr == s->picture);
1536  if (CONFIG_JPEGLS_DECODER && s->ls) {
1537 // for () {
1538 // reset_ls_coding_parameters(s, 0);
1539 
1540  if ((ret = ff_jpegls_decode_picture(s, predictor,
1541  point_transform, ilv)) < 0)
1542  return ret;
1543  } else {
1544  if (s->rgb) {
1545  if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
1546  return ret;
1547  } else {
1548  if ((ret = ljpeg_decode_yuv_scan(s, predictor,
1549  point_transform,
1550  nb_components)) < 0)
1551  return ret;
1552  }
1553  }
1554  } else {
1555  if (s->progressive && predictor) {
1556  av_assert0(s->picture_ptr == s->picture);
1557  if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
1558  ilv, prev_shift,
1559  point_transform)) < 0)
1560  return ret;
1561  } else {
1562  if ((ret = mjpeg_decode_scan(s, nb_components,
1563  prev_shift, point_transform,
1564  mb_bitmask, mb_bitmask_size, reference)) < 0)
1565  return ret;
1566  }
1567  }
1568 
1569  if (s->interlaced &&
1570  get_bits_left(&s->gb) > 32 &&
1571  show_bits(&s->gb, 8) == 0xFF) {
1572  GetBitContext bak = s->gb;
1573  align_get_bits(&bak);
1574  if (show_bits(&bak, 16) == 0xFFD1) {
1575  av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
1576  s->gb = bak;
1577  skip_bits(&s->gb, 16);
1578  s->bottom_field ^= 1;
1579 
1580  goto next_field;
1581  }
1582  }
1583 
1584  emms_c();
1585  return 0;
1586  out_of_range:
1587  av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
1588  return AVERROR_INVALIDDATA;
1589 }
1590 
1591 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1592 {
1593  if (get_bits(&s->gb, 16) != 4)
1594  return AVERROR_INVALIDDATA;
1595  s->restart_interval = get_bits(&s->gb, 16);
1596  s->restart_count = 0;
1597  av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
1598  s->restart_interval);
1599 
1600  return 0;
1601 }
1602 
1603 static int mjpeg_decode_app(MJpegDecodeContext *s)
1604 {
1605  int len, id, i;
1606 
1607  len = get_bits(&s->gb, 16);
1608  if (len < 6)
1609  return AVERROR_INVALIDDATA;
1610  if (8 * len > get_bits_left(&s->gb))
1611  return AVERROR_INVALIDDATA;
1612 
1613  id = get_bits_long(&s->gb, 32);
1614  len -= 6;
1615 
1616  if (s->avctx->debug & FF_DEBUG_STARTCODE) {
1617  char id_str[32];
1618  av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
1619  av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
1620  }
1621 
1622  /* Buggy AVID, it puts EOI only at every 10th frame. */
1623  /* Also, this fourcc is used by non-avid files too, it holds some
1624  information, but it's always present in AVID-created files. */
1625  if (id == AV_RB32("AVI1")) {
1626  /* structure:
1627  4bytes AVI1
1628  1bytes polarity
1629  1bytes always zero
1630  4bytes field_size
1631  4bytes field_size_less_padding
1632  */
1633  s->buggy_avid = 1;
1634  i = get_bits(&s->gb, 8); len--;
1635  av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
1636 #if 0
1637  skip_bits(&s->gb, 8);
1638  skip_bits(&s->gb, 32);
1639  skip_bits(&s->gb, 32);
1640  len -= 10;
1641 #endif
1642  goto out;
1643  }
1644 
1645 // len -= 2;
1646 
1647  if (id == AV_RB32("JFIF")) {
1648  int t_w, t_h, v1, v2;
1649  skip_bits(&s->gb, 8); /* the trailing zero-byte */
1650  v1 = get_bits(&s->gb, 8);
1651  v2 = get_bits(&s->gb, 8);
1652  skip_bits(&s->gb, 8);
1653 
1654  s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
1655  s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
1656  if ( s->avctx->sample_aspect_ratio.num <= 0
1657  || s->avctx->sample_aspect_ratio.den <= 0) {
1658  s->avctx->sample_aspect_ratio.num = 0;
1659  s->avctx->sample_aspect_ratio.den = 1;
1660  }
1661 
1662  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1663  av_log(s->avctx, AV_LOG_INFO,
1664  "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1665  v1, v2,
1666  s->avctx->sample_aspect_ratio.num,
1667  s->avctx->sample_aspect_ratio.den);
1668 
1669  t_w = get_bits(&s->gb, 8);
1670  t_h = get_bits(&s->gb, 8);
1671  if (t_w && t_h) {
1672  /* skip thumbnail */
1673  if (len -10 - (t_w * t_h * 3) > 0)
1674  len -= t_w * t_h * 3;
1675  }
1676  len -= 10;
1677  goto out;
1678  }
1679 
1680  if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
1681  skip_bits(&s->gb, 16); /* version */
1682  skip_bits(&s->gb, 16); /* flags0 */
1683  skip_bits(&s->gb, 16); /* flags1 */
1684  s->adobe_transform = get_bits(&s->gb, 8);
1685  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1686  av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
1687  len -= 7;
1688  goto out;
1689  }
1690 
1691  if (id == AV_RB32("LJIF")) {
1692  int rgb = s->rgb;
1693  int pegasus_rct = s->pegasus_rct;
1694  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1695  av_log(s->avctx, AV_LOG_INFO,
1696  "Pegasus lossless jpeg header found\n");
1697  skip_bits(&s->gb, 16); /* version ? */
1698  skip_bits(&s->gb, 16); /* unknown always 0? */
1699  skip_bits(&s->gb, 16); /* unknown always 0? */
1700  skip_bits(&s->gb, 16); /* unknown always 0? */
1701  switch (i=get_bits(&s->gb, 8)) {
1702  case 1:
1703  rgb = 1;
1704  pegasus_rct = 0;
1705  break;
1706  case 2:
1707  rgb = 1;
1708  pegasus_rct = 1;
1709  break;
1710  default:
1711  av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
1712  }
1713 
1714  len -= 9;
1715  if (s->got_picture)
1716  if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
1717  av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
1718  goto out;
1719  }
1720 
1721  s->rgb = rgb;
1722  s->pegasus_rct = pegasus_rct;
1723 
1724  goto out;
1725  }
1726  if (id == AV_RL32("colr") && len > 0) {
1727  s->colr = get_bits(&s->gb, 8);
1728  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1729  av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
1730  len --;
1731  goto out;
1732  }
1733  if (id == AV_RL32("xfrm") && len > 0) {
1734  s->xfrm = get_bits(&s->gb, 8);
1735  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1736  av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
1737  len --;
1738  goto out;
1739  }
1740 
1741  /* JPS extension by VRex */
1742  if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
1743  int flags, layout, type;
1744  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1745  av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
1746 
1747  skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
1748  skip_bits(&s->gb, 16); len -= 2; /* block length */
1749  skip_bits(&s->gb, 8); /* reserved */
1750  flags = get_bits(&s->gb, 8);
1751  layout = get_bits(&s->gb, 8);
1752  type = get_bits(&s->gb, 8);
1753  len -= 4;
1754 
1755  s->stereo3d = av_stereo3d_alloc();
1756  if (!s->stereo3d) {
1757  goto out;
1758  }
1759  if (type == 0) {
1760  s->stereo3d->type = AV_STEREO3D_2D;
1761  } else if (type == 1) {
1762  switch (layout) {
1763  case 0x01:
1764  s->stereo3d->type = AV_STEREO3D_LINES;
1765  break;
1766  case 0x02:
1767  s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
1768  break;
1769  case 0x03:
1770  s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
1771  break;
1772  }
1773  if (!(flags & 0x04)) {
1774  s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
1775  }
1776  }
1777  goto out;
1778  }
1779 
1780  /* EXIF metadata */
1781  if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
1782  GetByteContext gbytes;
1783  int ret, le, ifd_offset, bytes_read;
1784  const uint8_t *aligned;
1785 
1786  skip_bits(&s->gb, 16); // skip padding
1787  len -= 2;
1788 
1789  // init byte wise reading
1790  aligned = align_get_bits(&s->gb);
1791  bytestream2_init(&gbytes, aligned, len);
1792 
1793  // read TIFF header
1794  ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
1795  if (ret) {
1796  av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
1797  } else {
1798  bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
1799 
1800  // read 0th IFD and store the metadata
1801  // (return values > 0 indicate the presence of subimage metadata)
1802  ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
1803  if (ret < 0) {
1804  av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
1805  }
1806  }
1807 
1808  bytes_read = bytestream2_tell(&gbytes);
1809  skip_bits(&s->gb, bytes_read << 3);
1810  len -= bytes_read;
1811 
1812  goto out;
1813  }
1814 
1815  /* Apple MJPEG-A */
1816  if ((s->start_code == APP1) && (len > (0x28 - 8))) {
1817  id = get_bits_long(&s->gb, 32);
1818  len -= 4;
1819  /* Apple MJPEG-A */
1820  if (id == AV_RB32("mjpg")) {
1821 #if 0
1822  skip_bits(&s->gb, 32); /* field size */
1823  skip_bits(&s->gb, 32); /* pad field size */
1824  skip_bits(&s->gb, 32); /* next off */
1825  skip_bits(&s->gb, 32); /* quant off */
1826  skip_bits(&s->gb, 32); /* huff off */
1827  skip_bits(&s->gb, 32); /* image off */
1828  skip_bits(&s->gb, 32); /* scan off */
1829  skip_bits(&s->gb, 32); /* data off */
1830 #endif
1831  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1832  av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1833  }
1834  }
1835 
1836 out:
1837  /* slow but needed for extreme adobe jpegs */
1838  if (len < 0)
1839  av_log(s->avctx, AV_LOG_ERROR,
1840  "mjpeg: error, decode_app parser read over the end\n");
1841  while (--len > 0)
1842  skip_bits(&s->gb, 8);
1843 
1844  return 0;
1845 }
1846 
1847 static int mjpeg_decode_com(MJpegDecodeContext *s)
1848 {
1849  int len = get_bits(&s->gb, 16);
1850  if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) {
1851  char *cbuf = av_malloc(len - 1);
1852  if (cbuf) {
1853  int i;
1854  for (i = 0; i < len - 2; i++)
1855  cbuf[i] = get_bits(&s->gb, 8);
1856  if (i > 0 && cbuf[i - 1] == '\n')
1857  cbuf[i - 1] = 0;
1858  else
1859  cbuf[i] = 0;
1860 
1861  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1862  av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
1863 
1864  /* buggy avid, it puts EOI only at every 10th frame */
1865  if (!strncmp(cbuf, "AVID", 4)) {
1866  parse_avid(s, cbuf, len);
1867  } else if (!strcmp(cbuf, "CS=ITU601"))
1868  s->cs_itu601 = 1;
1869  else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
1870  (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
1871  s->flipped = 1;
1872  else if (!strcmp(cbuf, "MULTISCOPE II"))
1873  s->multiscope = 2;
1874 
1875  av_free(cbuf);
1876  }
1877  }
1878 
1879  return 0;
1880 }
1881 
1882 /* return the 8 bit start code value and update the search
1883  state. Return -1 if no start code found */
1884 static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1885 {
1886  const uint8_t *buf_ptr;
1887  unsigned int v, v2;
1888  int val;
1889  int skipped = 0;
1890 
1891  buf_ptr = *pbuf_ptr;
1892  while (buf_end - buf_ptr > 1) {
1893  v = *buf_ptr++;
1894  v2 = *buf_ptr;
1895  if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1896  val = *buf_ptr++;
1897  goto found;
1898  }
1899  skipped++;
1900  }
1901  buf_ptr = buf_end;
1902  val = -1;
1903 found:
1904  ff_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
1905  *pbuf_ptr = buf_ptr;
1906  return val;
1907 }
1908 
1909 int ff_mjpeg_find_marker(MJpegDecodeContext *s,
1910  const uint8_t **buf_ptr, const uint8_t *buf_end,
1911  const uint8_t **unescaped_buf_ptr,
1912  int *unescaped_buf_size)
1913 {
1914  int start_code;
1915  start_code = find_marker(buf_ptr, buf_end);
1916 
1917  av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
1918  if (!s->buffer)
1919  return AVERROR(ENOMEM);
1920 
1921  /* unescape buffer of SOS, use special treatment for JPEG-LS */
1922  if (start_code == SOS && !s->ls) {
1923  const uint8_t *src = *buf_ptr;
1924  const uint8_t *ptr = src;
1925  uint8_t *dst = s->buffer;
1926 
1927  #define copy_data_segment(skip) do { \
1928  ptrdiff_t length = (ptr - src) - (skip); \
1929  if (length > 0) { \
1930  memcpy(dst, src, length); \
1931  dst += length; \
1932  src = ptr; \
1933  } \
1934  } while (0)
1935 
1936  if (s->avctx->codec_id == AV_CODEC_ID_THP) {
1937  ptr = buf_end;
1938  copy_data_segment(0);
1939  } else {
1940  while (ptr < buf_end) {
1941  uint8_t x = *(ptr++);
1942 
1943  if (x == 0xff) {
1944  ptrdiff_t skip = 0;
1945  while (ptr < buf_end && x == 0xff) {
1946  x = *(ptr++);
1947  skip++;
1948  }
1949 
1950  /* 0xFF, 0xFF, ... */
1951  if (skip > 1) {
1952  copy_data_segment(skip);
1953 
1954  /* decrement src as it is equal to ptr after the
1955  * copy_data_segment macro and we might want to
1956  * copy the current value of x later on */
1957  src--;
1958  }
1959 
1960  if (x < 0xd0 || x > 0xd7) {
1961  copy_data_segment(1);
1962  if (x)
1963  break;
1964  }
1965  }
1966  }
1967  if (src < ptr)
1968  copy_data_segment(0);
1969  }
1970  #undef copy_data_segment
1971 
1972  *unescaped_buf_ptr = s->buffer;
1973  *unescaped_buf_size = dst - s->buffer;
1974  memset(s->buffer + *unescaped_buf_size, 0,
1975  AV_INPUT_BUFFER_PADDING_SIZE);
1976 
1977  av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
1978  (buf_end - *buf_ptr) - (dst - s->buffer));
1979  } else if (start_code == SOS && s->ls) {
1980  const uint8_t *src = *buf_ptr;
1981  uint8_t *dst = s->buffer;
1982  int bit_count = 0;
1983  int t = 0, b = 0;
1984  PutBitContext pb;
1985 
1986  /* find marker */
1987  while (src + t < buf_end) {
1988  uint8_t x = src[t++];
1989  if (x == 0xff) {
1990  while ((src + t < buf_end) && x == 0xff)
1991  x = src[t++];
1992  if (x & 0x80) {
1993  t -= FFMIN(2, t);
1994  break;
1995  }
1996  }
1997  }
1998  bit_count = t * 8;
1999  init_put_bits(&pb, dst, t);
2000 
2001  /* unescape bitstream */
2002  while (b < t) {
2003  uint8_t x = src[b++];
2004  put_bits(&pb, 8, x);
2005  if (x == 0xFF && b < t) {
2006  x = src[b++];
2007  if (x & 0x80) {
2008  av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
2009  x &= 0x7f;
2010  }
2011  put_bits(&pb, 7, x);
2012  bit_count--;
2013  }
2014  }
2015  flush_put_bits(&pb);
2016 
2017  *unescaped_buf_ptr = dst;
2018  *unescaped_buf_size = (bit_count + 7) >> 3;
2019  memset(s->buffer + *unescaped_buf_size, 0,
2020  AV_INPUT_BUFFER_PADDING_SIZE);
2021  } else {
2022  *unescaped_buf_ptr = *buf_ptr;
2023  *unescaped_buf_size = buf_end - *buf_ptr;
2024  }
2025 
2026  return start_code;
2027 }
2028 
2029 int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
2030  AVPacket *avpkt)
2031 {
2032  AVFrame *frame = data;
2033  const uint8_t *buf = avpkt->data;
2034  int buf_size = avpkt->size;
2035  MJpegDecodeContext *s = avctx->priv_data;
2036  const uint8_t *buf_end, *buf_ptr;
2037  const uint8_t *unescaped_buf_ptr;
2038  int hshift, vshift;
2039  int unescaped_buf_size;
2040  int start_code;
2041  int i, index;
2042  int ret = 0;
2043  int is16bit;
2044 
2045  av_dict_free(&s->exif_metadata);
2046  av_freep(&s->stereo3d);
2047  s->adobe_transform = -1;
2048 
2049  buf_ptr = buf;
2050  buf_end = buf + buf_size;
2051  while (buf_ptr < buf_end) {
2052  /* find start next marker */
2053  start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
2054  &unescaped_buf_ptr,
2055  &unescaped_buf_size);
2056  /* EOF */
2057  if (start_code < 0) {
2058  break;
2059  } else if (unescaped_buf_size > INT_MAX / 8) {
2060  av_log(avctx, AV_LOG_ERROR,
2061  "MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
2062  start_code, unescaped_buf_size, buf_size);
2063  return AVERROR_INVALIDDATA;
2064  }
2065  av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
2066  start_code, buf_end - buf_ptr);
2067 
2068  ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
2069 
2070  if (ret < 0) {
2071  av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
2072  goto fail;
2073  }
2074 
2075  s->start_code = start_code;
2076  if (s->avctx->debug & FF_DEBUG_STARTCODE)
2077  av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
2078 
2079  /* process markers */
2080  if (start_code >= 0xd0 && start_code <= 0xd7)
2081  av_log(avctx, AV_LOG_DEBUG,
2082  "restart marker: %d\n", start_code & 0x0f);
2083  /* APP fields */
2084  else if (start_code >= APP0 && start_code <= APP15)
2085  mjpeg_decode_app(s);
2086  /* Comment */
2087  else if (start_code == COM)
2088  mjpeg_decode_com(s);
2089 
2090  ret = -1;
2091 
2092  if (!CONFIG_JPEGLS_DECODER &&
2093  (start_code == SOF48 || start_code == LSE)) {
2094  av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
2095  return AVERROR(ENOSYS);
2096  }
2097 
2098  if (avctx->skip_frame == AVDISCARD_ALL) {
2099  switch(start_code) {
2100  case SOF0:
2101  case SOF1:
2102  case SOF2:
2103  case SOF3:
2104  case SOF48:
2105  case SOI:
2106  case SOS:
2107  case EOI:
2108  break;
2109  default:
2110  goto skip;
2111  }
2112  }
2113 
2114  switch (start_code) {
2115  case SOI:
2116  s->restart_interval = 0;
2117  s->restart_count = 0;
2118  /* nothing to do on SOI */
2119  break;
2120  case DQT:
2121  ff_mjpeg_decode_dqt(s);
2122  break;
2123  case DHT:
2124  if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
2125  av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
2126  goto fail;
2127  }
2128  break;
2129  case SOF0:
2130  case SOF1:
2131  s->lossless = 0;
2132  s->ls = 0;
2133  s->progressive = 0;
2134  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2135  goto fail;
2136  break;
2137  case SOF2:
2138  s->lossless = 0;
2139  s->ls = 0;
2140  s->progressive = 1;
2141  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2142  goto fail;
2143  break;
2144  case SOF3:
2145  s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2146  s->lossless = 1;
2147  s->ls = 0;
2148  s->progressive = 0;
2149  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2150  goto fail;
2151  break;
2152  case SOF48:
2153  s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
2154  s->lossless = 1;
2155  s->ls = 1;
2156  s->progressive = 0;
2157  if ((ret = ff_mjpeg_decode_sof(s)) < 0)
2158  goto fail;
2159  break;
2160  case LSE:
2161  if (!CONFIG_JPEGLS_DECODER ||
2162  (ret = ff_jpegls_decode_lse(s)) < 0)
2163  goto fail;
2164  break;
2165  case EOI:
2166 eoi_parser:
2167  s->cur_scan = 0;
2168  if (!s->got_picture) {
2169  av_log(avctx, AV_LOG_WARNING,
2170  "Found EOI before any SOF, ignoring\n");
2171  break;
2172  }
2173  if (s->interlaced) {
2174  s->bottom_field ^= 1;
2175  /* if not bottom field, do not output image yet */
2176  if (s->bottom_field == !s->interlace_polarity)
2177  break;
2178  }
2179  if (avctx->skip_frame == AVDISCARD_ALL) {
2180  s->got_picture = 0;
2181  goto the_end_no_picture;
2182  }
2183  if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
2184  return ret;
2185  *got_frame = 1;
2186  s->got_picture = 0;
2187 
2188  if (!s->lossless) {
2189  int qp = FFMAX3(s->qscale[0],
2190  s->qscale[1],
2191  s->qscale[2]);
2192  int qpw = (s->width + 15) / 16;
2193  AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
2194  if (qp_table_buf) {
2195  memset(qp_table_buf->data, qp, qpw);
2196  av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
2197  }
2198 
2199  if(avctx->debug & FF_DEBUG_QP)
2200  av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
2201  }
2202 
2203  goto the_end;
2204  case SOS:
2205  s->cur_scan++;
2206  if (avctx->skip_frame == AVDISCARD_ALL)
2207  break;
2208 
2209  if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
2210  (avctx->err_recognition & AV_EF_EXPLODE))
2211  goto fail;
2212  break;
2213  case DRI:
2214  mjpeg_decode_dri(s);
2215  break;
2216  case SOF5:
2217  case SOF6:
2218  case SOF7:
2219  case SOF9:
2220  case SOF10:
2221  case SOF11:
2222  case SOF13:
2223  case SOF14:
2224  case SOF15:
2225  case JPG:
2226  av_log(avctx, AV_LOG_ERROR,
2227  "mjpeg: unsupported coding type (%x)\n", start_code);
2228  break;
2229  }
2230 
2231 skip:
2232  /* eof process start code */
2233  buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
2234  av_log(avctx, AV_LOG_DEBUG,
2235  "marker parser used %d bytes (%d bits)\n",
2236  (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
2237  }
2238  if (s->got_picture && s->cur_scan) {
2239  av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
2240  goto eoi_parser;
2241  }
2242  av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
2243  return AVERROR_INVALIDDATA;
2244 fail:
2245  s->got_picture = 0;
2246  return ret;
2247 the_end:
2248 
2249  is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
2250 
2251  if (AV_RB32(s->upscale_h)) {
2252  int p;
2253  av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2254  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2255  avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2256  avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2257  avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2258  avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2259  avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2260  avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
2261  avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2262  avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2263  avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2264  avctx->pix_fmt == AV_PIX_FMT_GBRAP
2265  );
2266  avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2267  for (p = 0; p<4; p++) {
2268  uint8_t *line = s->picture_ptr->data[p];
2269  int w = s->width;
2270  int h = s->height;
2271  if (!s->upscale_h[p])
2272  continue;
2273  if (p==1 || p==2) {
2274  w = AV_CEIL_RSHIFT(w, hshift);
2275  h = AV_CEIL_RSHIFT(h, vshift);
2276  }
2277  if (s->upscale_v[p])
2278  h = (h+1)>>1;
2279  av_assert0(w > 0);
2280  for (i = 0; i < h; i++) {
2281  if (s->upscale_h[p] == 1) {
2282  if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
2283  else line[w - 1] = line[(w - 1) / 2];
2284  for (index = w - 2; index > 0; index--) {
2285  if (is16bit)
2286  ((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
2287  else
2288  line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
2289  }
2290  } else if (s->upscale_h[p] == 2) {
2291  if (is16bit) {
2292  ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
2293  if (w > 1)
2294  ((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
2295  } else {
2296  line[w - 1] = line[(w - 1) / 3];
2297  if (w > 1)
2298  line[w - 2] = line[w - 1];
2299  }
2300  for (index = w - 3; index > 0; index--) {
2301  line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
2302  }
2303  }
2304  line += s->linesize[p];
2305  }
2306  }
2307  }
2308  if (AV_RB32(s->upscale_v)) {
2309  int p;
2310  av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
2311  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
2312  avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
2313  avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
2314  avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
2315  avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
2316  avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
2317  avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
2318  avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
2319  avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
2320  avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
2321  avctx->pix_fmt == AV_PIX_FMT_GBRP ||
2322  avctx->pix_fmt == AV_PIX_FMT_GBRAP
2323  );
2324  avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2325  for (p = 0; p < 4; p++) {
2326  uint8_t *dst;
2327  int w = s->width;
2328  int h = s->height;
2329  if (!s->upscale_v[p])
2330  continue;
2331  if (p==1 || p==2) {
2332  w = AV_CEIL_RSHIFT(w, hshift);
2333  h = AV_CEIL_RSHIFT(h, vshift);
2334  }
2335  dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
2336  for (i = h - 1; i; i--) {
2337  uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
2338  uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
2339  if (src1 == src2 || i == h - 1) {
2340  memcpy(dst, src1, w);
2341  } else {
2342  for (index = 0; index < w; index++)
2343  dst[index] = (src1[index] + src2[index]) >> 1;
2344  }
2345  dst -= s->linesize[p];
2346  }
2347  }
2348  }
2349  if (s->flipped) {
2350  int j;
2351  avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
2352  for (index=0; index<4; index++) {
2353  uint8_t *dst = s->picture_ptr->data[index];
2354  int w = s->picture_ptr->width;
2355  int h = s->picture_ptr->height;
2356  if(index && index<3){
2357  w = AV_CEIL_RSHIFT(w, hshift);
2358  h = AV_CEIL_RSHIFT(h, vshift);
2359  }
2360  if(dst){
2361  uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
2362  for (i=0; i<h/2; i++) {
2363  for (j=0; j<w; j++)
2364  FFSWAP(int, dst[j], dst2[j]);
2365  dst += s->picture_ptr->linesize[index];
2366  dst2 -= s->picture_ptr->linesize[index];
2367  }
2368  }
2369  }
2370  }
2371  if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
2372  int w = s->picture_ptr->width;
2373  int h = s->picture_ptr->height;
2374  for (i=0; i<h; i++) {
2375  int j;
2376  uint8_t *dst[4];
2377  for (index=0; index<4; index++) {
2378  dst[index] = s->picture_ptr->data[index]
2379  + s->picture_ptr->linesize[index]*i;
2380  }
2381  for (j=0; j<w; j++) {
2382  int k = dst[3][j];
2383  int r = dst[0][j] * k;
2384  int g = dst[1][j] * k;
2385  int b = dst[2][j] * k;
2386  dst[0][j] = g*257 >> 16;
2387  dst[1][j] = b*257 >> 16;
2388  dst[2][j] = r*257 >> 16;
2389  dst[3][j] = 255;
2390  }
2391  }
2392  }
2393  if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
2394  int w = s->picture_ptr->width;
2395  int h = s->picture_ptr->height;
2396  for (i=0; i<h; i++) {
2397  int j;
2398  uint8_t *dst[4];
2399  for (index=0; index<4; index++) {
2400  dst[index] = s->picture_ptr->data[index]
2401  + s->picture_ptr->linesize[index]*i;
2402  }
2403  for (j=0; j<w; j++) {
2404  int k = dst[3][j];
2405  int r = (255 - dst[0][j]) * k;
2406  int g = (128 - dst[1][j]) * k;
2407  int b = (128 - dst[2][j]) * k;
2408  dst[0][j] = r*257 >> 16;
2409  dst[1][j] = (g*257 >> 16) + 128;
2410  dst[2][j] = (b*257 >> 16) + 128;
2411  dst[3][j] = 255;
2412  }
2413  }
2414  }
2415 
2416  if (s->stereo3d) {
2417  AVStereo3D *stereo = av_stereo3d_create_side_data(data);
2418  if (stereo) {
2419  stereo->type = s->stereo3d->type;
2420  stereo->flags = s->stereo3d->flags;
2421  }
2422  av_freep(&s->stereo3d);
2423  }
2424 
2425  av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
2426  av_dict_free(&s->exif_metadata);
2427 
2428 the_end_no_picture:
2429  av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
2430  buf_end - buf_ptr);
2431 // return buf_end - buf_ptr;
2432  return buf_ptr - buf;
2433 }
2434 
2435 av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
2436 {
2437  MJpegDecodeContext *s = avctx->priv_data;
2438  int i, j;
2439 
2440  if (s->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
2441  av_log(avctx, AV_LOG_INFO, "Single field\n");
2442  }
2443 
2444  if (s->picture) {
2445  av_frame_free(&s->picture);
2446  s->picture_ptr = NULL;
2447  } else if (s->picture_ptr)
2448  av_frame_unref(s->picture_ptr);
2449 
2450  av_freep(&s->buffer);
2451  av_freep(&s->stereo3d);
2452  av_freep(&s->ljpeg_buffer);
2453  s->ljpeg_buffer_size = 0;
2454 
2455  for (i = 0; i < 3; i++) {
2456  for (j = 0; j < 4; j++)
2457  ff_free_vlc(&s->vlcs[i][j]);
2458  }
2459  for (i = 0; i < MAX_COMPONENTS; i++) {
2460  av_freep(&s->blocks[i]);
2461  av_freep(&s->last_nnz[i]);
2462  }
2463  av_dict_free(&s->exif_metadata);
2464  return 0;
2465 }
2466 
2467 static void decode_flush(AVCodecContext *avctx)
2468 {
2469  MJpegDecodeContext *s = avctx->priv_data;
2470  s->got_picture = 0;
2471 }
2472 
2473 #if CONFIG_MJPEG_DECODER
2474 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
2475 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2476 static const AVOption options[] = {
2477  { "extern_huff", "Use external huffman table.",
2478  OFFSET(extern_huff), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
2479  { NULL },
2480 };
2481 
2482 static const AVClass mjpegdec_class = {
2483  .class_name = "MJPEG decoder",
2484  .item_name = av_default_item_name,
2485  .option = options,
2486  .version = LIBAVUTIL_VERSION_INT,
2487 };
2488 
2489 AVCodec ff_mjpeg_decoder = {
2490  .name = "mjpeg",
2491  .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
2492  .type = AVMEDIA_TYPE_VIDEO,
2493  .id = AV_CODEC_ID_MJPEG,
2494  .priv_data_size = sizeof(MJpegDecodeContext),
2495  .init = ff_mjpeg_decode_init,
2496  .close = ff_mjpeg_decode_end,
2497  .decode = ff_mjpeg_decode_frame,
2498  .flush = decode_flush,
2499  .capabilities = AV_CODEC_CAP_DR1,
2500  .max_lowres = 3,
2501  .priv_class = &mjpegdec_class,
2502  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
2503  FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2504 };
2505 #endif
2506 #if CONFIG_THP_DECODER
2507 AVCodec ff_thp_decoder = {
2508  .name = "thp",
2509  .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
2510  .type = AVMEDIA_TYPE_VIDEO,
2511  .id = AV_CODEC_ID_THP,
2512  .priv_data_size = sizeof(MJpegDecodeContext),
2513  .init = ff_mjpeg_decode_init,
2514  .close = ff_mjpeg_decode_end,
2515  .decode = ff_mjpeg_decode_frame,
2516  .flush = decode_flush,
2517  .capabilities = AV_CODEC_CAP_DR1,
2518  .max_lowres = 3,
2519  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
2520 };
2521 #endif
MJpegDecodeContext::block_stride
int block_stride[MAX_COMPONENTS]
Definition: mjpegdec.h:82
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1541
val
const char const char void * val
Definition: avisynth_c.h:634
MJpegDecodeContext::pix_desc
const AVPixFmtDescriptor * pix_desc
!< stereoscopic information (cached, since it is read before frame allocation)
Definition: mjpegdec.h:132
s
const char * s
Definition: avisynth_c.h:631
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
MJpegDecodeContext::v_count
int v_count[MAX_COMPONENTS]
Definition: mjpegdec.h:85
AV_CODEC_ID_AMV
Definition: avcodec.h:214
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2157
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
h
h
Definition: vp9dsp_template.c:2093
AVOption
AVOption.
Definition: opt.h:245
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:496
BlockDSPContext::clear_block
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
EOI
Definition: mjpeg.h:71
id
enum AVCodecID id
Definition: mxfenc.c:104
COM
Definition: mjpeg.h:111
DQT
Definition: mjpeg.h:73
SOF1
Definition: mjpeg.h:40
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
imgutils.h
misc image utilities
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:168
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
SOF3
Definition: mjpeg.h:42
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:209
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:217
g
const char * g
Definition: vf_curves.c:108
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_PIX_FMT_RGBA64
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:320
AVCOL_SPC_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:426
MJpegDecodeContext::h_scount
int h_scount[MAX_COMPONENTS]
Definition: mjpegdec.h:90
MJpegDecodeContext::bdsp
BlockDSPContext bdsp
Definition: mjpegdec.h:107
ff_mjpeg_decode_dqt
int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
Definition: mjpegdec.c:167
mjpeg_decode_com
static int mjpeg_decode_com(MJpegDecodeContext *s)
Definition: mjpegdec.c:1847
AVCodecContext::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2262
tiff.h
TIFF tables.
ff_init_vlc_sparse
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:275
AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:181
AVRational::num
int num
numerator
Definition: rational.h:44
MJpegDecodeContext::qscale
int qscale[4]
quantizer scale calculated from quant_matrixes
Definition: mjpegdec.h:55
AVPacket::size
int size
Definition: avcodec.h:1468
b
const char * b
Definition: vf_curves.c:109
MJpegDecodeContext::buffer
uint8_t * buffer
Definition: mjpegdec.h:51
AVCodecContext::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1935
av_frame_set_qp_table
int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type)
Definition: frame.c:50
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
copy_data_segment
#define copy_data_segment(skip)
av_dict_copy
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:213
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:119
MJpegDecodeContext::dc_index
int dc_index[MAX_COMPONENTS]
Definition: mjpegdec.h:87
DRI
Definition: mjpeg.h:75
av_get_codec_tag_string
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:2668
SOF14
Definition: mjpeg.h:53
MJpegDecodeContext::linesize
int linesize[MAX_COMPONENTS]
linesize << interlaced
Definition: mjpegdec.h:99
AVDISCARD_ALL
discard all
Definition: avcodec.h:688
ScanTable::permutated
uint8_t permutated[64]
Definition: idctdsp.h:31
MJpegDecodeContext::upscale_v
uint8_t upscale_v[4]
Definition: mjpegdec.h:66
run
uint8_t run
Definition: svq3.c:149
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2924
AV_STEREO3D_SIDEBYSIDE
Views are next to each other.
Definition: stereo3d.h:45
ff_mjpeg_decode_dht
int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
Definition: mjpegdec.c:205
AVCodec
AVCodec.
Definition: avcodec.h:3392
exif.h
EXIF metadata parser.
jpeglsdec.h
JPEG-LS decoder.
mjpeg.h
MJPEG encoder and decoder.
MJpegDecodeContext::comp_index
int comp_index[MAX_COMPONENTS]
Definition: mjpegdec.h:86
copy_block2
static void copy_block2(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)
Definition: copy_block.h:26
MJpegDecodeContext::hdsp
HpelDSPContext hdsp
Definition: mjpegdec.h:108
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1661
VD
#define VD
Definition: exr.c:1461
FF_QSCALE_TYPE_MPEG1
#define FF_QSCALE_TYPE_MPEG1
Definition: avcodec.h:1232
AVCodecContext::skip_frame
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:3139
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
MJpegDecodeContext::block
int16_t block[64]
Definition: mjpegdec.h:101
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
avpriv_request_sample
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
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:40
AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:103
ff_mjpeg_build_huffman_codes
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, const uint8_t *bits_table, const uint8_t *val_table)
Definition: jpegtables.c:127
SOS
Definition: mjpeg.h:72
bits
uint8_t bits
Definition: crc.c:295
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:141
mjpeg_decode_dri
static int mjpeg_decode_dri(MJpegDecodeContext *s)
Definition: mjpegdec.c:1591
AV_PIX_FMT_PAL8
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
opt.h
AVOptions.
AVStereo3D
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:123
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2764
MJpegDecodeContext::ljpeg_buffer
uint16_t(* ljpeg_buffer)[4]
Definition: mjpegdec.h:124
SOF7
Definition: mjpeg.h:46
MJpegDecodeContext::ljpeg_buffer_size
unsigned int ljpeg_buffer_size
Definition: mjpegdec.h:125
MJpegDecodeContext::quant_matrixes
int16_t quant_matrixes[4][64]
Definition: mjpegdec.h:53
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:375
FF_CODEC_PROPERTY_LOSSLESS
#define FF_CODEC_PROPERTY_LOSSLESS
Definition: avcodec.h:3346
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
SOF15
Definition: mjpeg.h:54
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
avpriv_mjpeg_bits_dc_luminance
const uint8_t avpriv_mjpeg_bits_dc_luminance[17]
Definition: jpegtables.c:65
MJpegDecodeContext::last_nnz
uint8_t * last_nnz[MAX_COMPONENTS]
Definition: mjpegdec.h:103
AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:96
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
MJpegDecodeContext::picture_ptr
AVFrame * picture_ptr
Definition: mjpegdec.h:97
AVPacket::data
uint8_t * data
Definition: avcodec.h:1467
MJpegDecodeContext::quant_sindex
int quant_sindex[MAX_COMPONENTS]
Definition: mjpegdec.h:92
MAX_COMPONENTS
#define MAX_COMPONENTS
Definition: mjpegdec.h:42
AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:102
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
MJpegDecodeContext::h_count
int h_count[MAX_COMPONENTS]
Definition: mjpegdec.h:84
AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:76
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
AV_PIX_FMT_BGR48
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:321
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:343
AVFrame::interlaced_frame
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:312
AVCodecContext::lowres
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2934
size
ptrdiff_t size
Definition: opengl_enc.c:101
AV_CODEC_ID_MJPEG
Definition: avcodec.h:114
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:364
options
const OptionDef options[]
Definition: ffserver.c:3962
AVCodecContext::chroma_sample_location
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2269
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
PREDICT
#define PREDICT(ret, topleft, top, left, predictor)
Definition: mjpeg.h:118
predictor
static void predictor(uint8_t *src, int size)
Definition: exr.c:222
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:607
ff_mjpeg_decode_frame
int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: mjpegdec.c:2029
AVCodec::id
enum AVCodecID id
Definition: avcodec.h:3406
MJpegDecodeContext::exif_metadata
AVDictionary * exif_metadata
Definition: mjpegdec.h:128
UPDATE_CACHE
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:173
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:230
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVStereo3D::flags
int flags
Additional information about the frame packing.
Definition: stereo3d.h:132
handle_rstn
static int handle_rstn(MJpegDecodeContext *s, int nb_components)
Definition: mjpegdec.c:908
mask
static const uint16_t mask[17]
Definition: lzw.c:38
PTRDIFF_SPECIFIER
#define PTRDIFF_SPECIFIER
Definition: internal.h:250
MJpegDecodeContext::nb_blocks
int nb_blocks[MAX_COMPONENTS]
Definition: mjpegdec.h:89
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:68
AVERROR
#define AVERROR(e)
Definition: error.h:43
avpriv_mjpeg_bits_dc_chrominance
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17]
Definition: jpegtables.c:70
copy_mb
static void copy_mb(CinepakEncContext *s, uint8_t *a_data[4], int a_linesize[4], uint8_t *b_data[4], int b_linesize[4])
Definition: cinepakenc.c:604
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
ff_mjpeg_decode_end
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
Definition: mjpegdec.c:2435
MJpegDecodeContext::vlcs
VLC vlcs[3][4]
Definition: mjpegdec.h:54
parse_avid
static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
Definition: mjpegdec.c:90
av_pix_fmt_get_chroma_sub_sample
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:2185
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:176
r
const char * r
Definition: vf_curves.c:107
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:366
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1627
line
Definition: graph2dot.c:48
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3399
mjpeg_decode_scan
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al, const uint8_t *mb_bitmask, int mb_bitmask_size, const AVFrame *reference)
Definition: mjpegdec.c:1245
ff_jpegls_decode_lse
int ff_jpegls_decode_lse(MJpegDecodeContext *s)
Decode LSE block with initialization parameters.
Definition: jpeglsdec.c:51
find_marker
static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
Definition: mjpegdec.c:1884
CLOSE_READER
#define CLOSE_READER(name, gb)
Definition: get_bits.h:144
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
fail
#define fail()
Definition: checkasm.h:80
SOF0
Definition: mjpeg.h:39
SOI
Definition: mjpeg.h:70
VLC
Definition: get_bits.h:63
build_vlc
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table, int nb_codes, int use_static, int is_ac)
Definition: mjpegdec.c:51
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
ff_hpeldsp_init
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
decode_dc_progressive
static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block, int component, int dc_index, int16_t *quant_matrix, int Al)
Definition: mjpegdec.c:727
SOF48
JPEG-LS.
Definition: mjpeg.h:103
APP0
Definition: mjpeg.h:79
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:251
MJpegDecodeContext::scantable
ScanTable scantable
Definition: mjpegdec.h:106
APP1
Definition: mjpeg.h:80
AV_STEREO3D_LINES
Views are packed per line, as if interlaced.
Definition: stereo3d.h:97
mjpeg_copy_block
static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s, uint8_t *dst, const uint8_t *src, int linesize, int lowres)
Definition: mjpegdec.c:1214
DHT
Definition: mjpeg.h:56
ff_mjpeg_decode_sof
int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
Definition: mjpegdec.c:264
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:266
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:349
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2811
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:314
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
SOF5
Definition: mjpeg.h:44
decode_block
static int decode_block(MJpegDecodeContext *s, int16_t *block, int component, int dc_index, int ac_index, int16_t *quant_matrix)
Definition: mjpegdec.c:678
AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:75
interlaced
uint8_t interlaced
Definition: mxfenc.c:1823
MJpegDecodeContext::component_id
int component_id[MAX_COMPONENTS]
Definition: mjpegdec.h:83
mjpeg_decode_app
static int mjpeg_decode_app(MJpegDecodeContext *s)
Definition: mjpegdec.c:1603
NEG_USR32
#define NEG_USR32(a, s)
Definition: mathops.h:174
AV_CODEC_ID_THP
Definition: avcodec.h:207
SOF2
Definition: mjpeg.h:41
AV_OPT_TYPE_BOOL
Definition: opt.h:239
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:295
MJpegDecodeContext::quant_index
int quant_index[4]
Definition: mjpegdec.h:94
LAST_SKIP_BITS
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:194
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:574
MJpegDecodeContext::v_scount
int v_scount[MAX_COMPONENTS]
Definition: mjpegdec.h:91
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2822
n
int n
Definition: avisynth_c.h:547
GET_VLC
#define GET_VLC(code, name, gb, table, bits, max_depth)
If the vlc code is invalid and max_depth=1, then no bits will be removed.
Definition: get_bits.h:497
IDCTDSPContext::idct_permutation
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
src
#define src
Definition: vp9dsp.c:530
avcodec_get_chroma_sub_sample
void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: imgconvert.c:38
MJpegDecodeContext::gb
GetBitContext gb
Definition: mjpegdec.h:47
AV_STEREO3D_FLAG_INVERT
#define AV_STEREO3D_FLAG_INVERT
Inverted views, Right/Bottom represents the left view.
Definition: stereo3d.h:114
ZERO_RUN
#define ZERO_RUN
Definition: mjpegdec.c:825
SHOW_UBITS
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:206
le
uint8_t le
Definition: crc.c:294
AVCOL_RANGE_JPEG
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:443
pred
static const float pred[4]
Definition: siprdata.h:259
out
FILE * out
Definition: movenc-test.c:54
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:341
bytestream2_tell
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
IDCTDSPContext::idct_put
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
MJpegDecodeContext::idsp
IDCTDSPContext idsp
Definition: mjpegdec.h:109
src1
#define src1
Definition: h264pred.c:139
AVStereo3D::type
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:127
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
av_bswap32
#define av_bswap32
Definition: bswap.h:33
avcodec.h
Libavcodec external API header.
SOF13
Definition: mjpeg.h:52
copy_block.h
avpriv_frame_get_metadatap
AVDictionary ** avpriv_frame_get_metadatap(AVFrame *frame)
Definition: frame.c:47
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1549
av_buffer_alloc
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
ff_blockdsp_init
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:449
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:189
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2763
MJpegDecodeContext::stereo3d
AVStereo3D * stereo3d
Definition: mjpegdec.h:130
AVCodecContext
main external API structure.
Definition: avcodec.h:1532
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:89
get_xbits
static int get_xbits(GetBitContext *s, int n)
read mpeg1 dc style vlc (sign bit + mantissa with no MSB).
Definition: get_bits.h:231
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:894
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
OPEN_READER
#define OPEN_READER(name, gb)
Definition: get_bits.h:133
avpriv_exif_decode_ifd
int avpriv_exif_decode_ifd(AVCodecContext *avctx, GetByteContext *gbytes, int le, int depth, AVDictionary **metadata)
Recursively decodes all IFD's and adds included TAGS into the metadata dictionary.
Definition: exif.c:122
HpelDSPContext::put_pixels_tab
op_pixels_func put_pixels_tab[4][4]
Halfpel motion compensation with rounding (a+b+1)>>1.
Definition: hpeldsp.h:56
buf
void * buf
Definition: avisynth_c.h:553
type
GLint GLenum type
Definition: opengl_enc.c:105
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1648
avpriv_mjpeg_val_dc
const uint8_t avpriv_mjpeg_val_dc[12]
Definition: jpegtables.c:67
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
init_idct
static void init_idct(AVCodecContext *avctx)
Definition: mjpegdec.c:101
ff_jpegls_decode_picture
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transform, int ilv)
Definition: jpeglsdec.c:343
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:1726
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:305
index
int index
Definition: gxfenc.c:89
mjpeg_decode_dc
static int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
Definition: mjpegdec.c:660
MJpegDecodeContext::ac_index
int ac_index[MAX_COMPONENTS]
Definition: mjpegdec.h:88
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2255
ljpeg_decode_rgb_scan
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
Definition: mjpegdec.c:942
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
GET_CACHE
#define GET_CACHE(name, gb)
Definition: get_bits.h:210
ff_zigzag_direct
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
SOF6
Definition: mjpeg.h:45
MJpegDecodeContext::coefs_finished
uint64_t coefs_finished[MAX_COMPONENTS]
bitmask of which coefs have been completely decoded (progressive mode)
Definition: mjpegdec.h:104
SOF9
Definition: mjpeg.h:48
AV_PIX_FMT_GBR24P
#define AV_PIX_FMT_GBR24P
Definition: pixfmt.h:299
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:345
avpriv_mjpeg_bits_ac_chrominance
const uint8_t avpriv_mjpeg_bits_ac_chrominance[17]
Definition: jpegtables.c:99
start_code
static const uint8_t start_code[]
Definition: h264.c:1298
mjpeg_decode_scan_progressive_ac
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al)
Definition: mjpegdec.c:1366
avpriv_mjpeg_val_ac_chrominance
const uint8_t avpriv_mjpeg_val_ac_chrominance[]
Definition: jpegtables.c:102
MIN_CACHE_BITS
#define MIN_CACHE_BITS
Definition: get_bits.h:125
JPG
Definition: mjpeg.h:47
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:474
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.
LSE
JPEG-LS extension parameters.
Definition: mjpeg.h:104
flags
static int flags
Definition: cpu.c:47
av_stereo3d_create_side_data
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:32
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
level
uint8_t level
Definition: svq3.c:150
AV_FIELD_BB
Definition: avcodec.h:1518
OFFSET
#define OFFSET(x)
Definition: ffmpeg_opt.c:3106
ff_mjpeg_decode_sos
int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask, int mb_bitmask_size, const AVFrame *reference)
Definition: mjpegdec.c:1431
AVCOL_RANGE_MPEG
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:442
ff_mjpeg_decode_init
av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
Definition: mjpegdec.c:110
APP15
Definition: mjpeg.h:94
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:572
ljpeg_decode_yuv_scan
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform, int nb_components)
Definition: mjpegdec.c:1064
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:81
av_fast_malloc
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:499
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:71
internal.h
common internal api header.
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
if
if(ret< 0)
Definition: vf_mcdeint.c:282
build_basic_mjpeg_vlc
static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
Definition: mjpegdec.c:74
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
Definition: internal.h:60
AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:229
AV_STEREO3D_2D
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:35
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
FF_DEBUG_QP
#define FF_DEBUG_QP
Definition: avcodec.h:2768
AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:77
decode_block_refinement
static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN)
Definition: mjpegdec.c:843
AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
AVCodecContext::properties
unsigned properties
Definition: avcodec.h:3345
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
AVRational::den
int den
denominator
Definition: rational.h:45
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:635
lowres
static int lowres
Definition: ffplay.c:334
avpriv_mjpeg_bits_ac_luminance
const uint8_t avpriv_mjpeg_bits_ac_luminance[17]
Definition: jpegtables.c:73
MJpegDecodeContext::avctx
AVCodecContext * avctx
Definition: mjpegdec.h:46
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1574
re
float re
Definition: fft-test.c:73
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
ff_init_scantable
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
FF_DEBUG_STARTCODE
#define FF_DEBUG_STARTCODE
Definition: avcodec.h:2777
shift_output
static void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
Definition: mjpegdec.c:1230
ff_idctdsp_init
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:241
AVFrame::top_field_first
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:317
MJpegDecodeContext::got_picture
int got_picture
we found a SOF and picture is valid, too.
Definition: mjpegdec.h:98
len
int len
Definition: vorbis_enc_data.h:452
avpriv_mjpeg_val_ac_luminance
const uint8_t avpriv_mjpeg_val_ac_luminance[]
Definition: jpegtables.c:75
MJpegDecodeContext::blocks
int16_t(*[MAX_COMPONENTS] blocks)[64]
intermediate sums (progressive mode)
Definition: mjpegdec.h:102
MJpegDecodeContext::picture
AVFrame * picture
Definition: mjpegdec.h:96
copy_block4
static void copy_block4(uint8_t *dst, const uint8_t *src, int dstStride, int srcStride, int h)
Definition: copy_block.h:37
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
SOF11
Definition: mjpeg.h:50
AV_STEREO3D_TOPBOTTOM
Views are on top of each other.
Definition: stereo3d.h:55
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:247
bytestream2_seek
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:208
AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:266
MJpegDecodeContext::last_dc
int last_dc[MAX_COMPONENTS]
Definition: mjpegdec.h:95
align_get_bits
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:457
layout
uint64_t layout
Definition: channel_layout.c:77
REFINE_BIT
#define REFINE_BIT(j)
Definition: mjpegdec.c:817
MJpegDecodeContext::upscale_h
uint8_t upscale_h[4]
Definition: mjpegdec.h:65
decode_block_progressive
static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN)
Definition: mjpegdec.c:745
dc
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
Definition: audio_convert.c:194
av_mallocz_array
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
decode_flush
static void decode_flush(AVCodecContext *avctx)
Definition: mjpegdec.c:2467
AVCodecContext::frame_number
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2318
ff_tdecode_header
int ff_tdecode_header(GetByteContext *gb, int *le, int *ifd_offset)
Decodes a TIFF header from the input bytestream and sets the endianness in *le and the offset to the ...
Definition: tiff_common.c:261
AVFrame::height
int height
Definition: frame.h:230
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:101
AVCodecContext::field_order
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2284
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
av_always_inline
#define av_always_inline
Definition: attributes.h:39
AV_FIELD_UNKNOWN
Definition: avcodec.h:1515
AV_LOG_FATAL
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
AVCHROMA_LOC_CENTER
mpeg1 4:2:0, jpeg 4:2:0, h263 4:2:0
Definition: pixfmt.h:465
APP3
Definition: mjpeg.h:82
FFSWAP
#define FFSWAP(type, a, b)
Definition: common.h:99
ff_mjpeg_find_marker
int ff_mjpeg_find_marker(MJpegDecodeContext *s, const uint8_t **buf_ptr, const uint8_t *buf_end, const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size)
Definition: mjpegdec.c:1909
mjpegdec.h
MJPEG decoder.
av_stereo3d_alloc
AVStereo3D * av_stereo3d_alloc(void)
Allocate an AVStereo3D structure and set its fields to default values.
Definition: stereo3d.c:27
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
ff_free_vlc
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:360
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1241
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:342
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
FFMAX3
#define FFMAX3(a, b, c)
Definition: common.h:95
buffer
GLuint buffer
Definition: opengl_enc.c:102
AVComponentDescriptor::step
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
SOF10
Definition: mjpeg.h:49
width
static int width
Definition: demuxing_decoding.c:39
put_bits.h
bitstream writer API
block
static int16_t block[64]
Definition: dct-test.c:112
Generated on Mon Feb 15 2016 15:20:40 for FFmpeg by   doxygen 1.8.6