Libav
huffyuvdec.c
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1 /*
2  * huffyuv decoder
3  *
4  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
7  * the algorithm used
8  *
9  * This file is part of Libav.
10  *
11  * Libav is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * Libav is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with Libav; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
31 #include "avcodec.h"
32 #include "get_bits.h"
33 #include "huffyuv.h"
34 #include "thread.h"
35 
36 #define classic_shift_luma_table_size 42
38  34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
39  16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
40  69,68, 0
41 };
42 
43 #define classic_shift_chroma_table_size 59
45  66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
46  56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
47  214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0
48 };
49 
50 static const unsigned char classic_add_luma[256] = {
51  3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
52  73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
53  68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
54  35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
55  37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
56  35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
57  27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
58  15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
59  12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
60  12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
61  18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
62  28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
63  28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
64  62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
65  54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
66  46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
67 };
68 
69 static const unsigned char classic_add_chroma[256] = {
70  3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
71  7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
72  11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
73  43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
74  143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
75  80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
76  17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
77  112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
78  0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
79  135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
80  52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
81  19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
82  7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
83  83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
84  14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
85  6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
86 };
87 
88 static int read_len_table(uint8_t *dst, GetBitContext *gb)
89 {
90  int i, val, repeat;
91 
92  for (i = 0; i < 256;) {
93  repeat = get_bits(gb, 3);
94  val = get_bits(gb, 5);
95  if (repeat == 0)
96  repeat = get_bits(gb, 8);
97  if (i + repeat > 256 || get_bits_left(gb) < 0) {
98  av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
99  return -1;
100  }
101  while (repeat--)
102  dst[i++] = val;
103  }
104  return 0;
105 }
106 
108 {
109  uint16_t symbols[1 << VLC_BITS];
110  uint16_t bits[1 << VLC_BITS];
111  uint8_t len[1 << VLC_BITS];
112  int ret;
113 
114  if (s->bitstream_bpp < 24) {
115  int p, i, y, u;
116  for (p = 0; p < 3; p++) {
117  for (i = y = 0; y < 256; y++) {
118  int len0 = s->len[0][y];
119  int limit = VLC_BITS - len0;
120  if(limit <= 0)
121  continue;
122  for (u = 0; u < 256; u++) {
123  int len1 = s->len[p][u];
124  if (len1 > limit)
125  continue;
126  len[i] = len0 + len1;
127  bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
128  symbols[i] = (y << 8) + u;
129  if(symbols[i] != 0xffff) // reserved to mean "invalid"
130  i++;
131  }
132  }
133  ff_free_vlc(&s->vlc[3 + p]);
134  if ((ret = ff_init_vlc_sparse(&s->vlc[3 + p], VLC_BITS, i, len, 1, 1,
135  bits, 2, 2, symbols, 2, 2, 0)) < 0)
136  return ret;
137  }
138  } else {
139  uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;
140  int i, b, g, r, code;
141  int p0 = s->decorrelate;
142  int p1 = !s->decorrelate;
143  // restrict the range to +/-16 because that's pretty much guaranteed to
144  // cover all the combinations that fit in 11 bits total, and it doesn't
145  // matter if we miss a few rare codes.
146  for (i = 0, g = -16; g < 16; g++) {
147  int len0 = s->len[p0][g & 255];
148  int limit0 = VLC_BITS - len0;
149  if (limit0 < 2)
150  continue;
151  for (b = -16; b < 16; b++) {
152  int len1 = s->len[p1][b & 255];
153  int limit1 = limit0 - len1;
154  if (limit1 < 1)
155  continue;
156  code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
157  for (r = -16; r < 16; r++) {
158  int len2 = s->len[2][r & 255];
159  if (len2 > limit1)
160  continue;
161  len[i] = len0 + len1 + len2;
162  bits[i] = (code << len2) + s->bits[2][r & 255];
163  if (s->decorrelate) {
164  map[i][G] = g;
165  map[i][B] = g + b;
166  map[i][R] = g + r;
167  } else {
168  map[i][B] = g;
169  map[i][G] = b;
170  map[i][R] = r;
171  }
172  i++;
173  }
174  }
175  }
176  ff_free_vlc(&s->vlc[3]);
177  if ((ret = init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1,
178  bits, 2, 2, 0)) < 0)
179  return ret;
180  }
181  return 0;
182 }
183 
184 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
185 {
186  GetBitContext gb;
187  int i, ret;
188 
189  if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
190  return ret;
191 
192  for (i = 0; i < 3; i++) {
193  if ((ret = read_len_table(s->len[i], &gb)) < 0)
194  return ret;
195  if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i])) < 0)
196  return ret;
197  ff_free_vlc(&s->vlc[i]);
198  if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
199  s->bits[i], 4, 4, 0)) < 0)
200  return ret;
201  }
202 
203  if ((ret = generate_joint_tables(s)) < 0)
204  return ret;
205 
206  return (get_bits_count(&gb) + 7) / 8;
207 }
208 
210 {
211  GetBitContext gb;
212  int i, ret;
213 
214  if ((ret = init_get_bits(&gb, classic_shift_luma,
216  return ret;
217  if ((ret = read_len_table(s->len[0], &gb)) < 0)
218  return ret;
219 
220  if ((ret = init_get_bits(&gb, classic_shift_chroma,
222  return ret;
223  if ((ret = read_len_table(s->len[1], &gb)) < 0)
224  return ret;
225 
226  for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
227  for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
228 
229  if (s->bitstream_bpp >= 24) {
230  memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
231  memcpy(s->len[1] , s->len [0], 256 * sizeof(uint8_t));
232  }
233  memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
234  memcpy(s->len[2] , s->len [1], 256 * sizeof(uint8_t));
235 
236  for (i = 0; i < 3; i++) {
237  ff_free_vlc(&s->vlc[i]);
238  if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
239  s->bits[i], 4, 4, 0)) < 0)
240  return ret;
241  }
242 
243  if ((ret = generate_joint_tables(s)) < 0)
244  return ret;
245 
246  return 0;
247 }
248 
250 {
251  HYuvContext *s = avctx->priv_data;
252  int ret;
253 
254  ff_huffyuv_common_init(avctx);
255  memset(s->vlc, 0, 3 * sizeof(VLC));
256 
257  s->interlaced = s->height > 288;
258 
259  s->bgr32 = 1;
260 
261  if (avctx->extradata_size) {
262  if ((avctx->bits_per_coded_sample & 7) &&
263  avctx->bits_per_coded_sample != 12)
264  s->version = 1; // do such files exist at all?
265  else
266  s->version = 2;
267  } else
268  s->version = 0;
269 
270  if (s->version == 2) {
271  int method, interlace;
272 
273  if (avctx->extradata_size < 4)
274  return -1;
275 
276  method = ((uint8_t*)avctx->extradata)[0];
277  s->decorrelate = method & 64 ? 1 : 0;
278  s->predictor = method & 63;
279  s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1];
280  if (s->bitstream_bpp == 0)
281  s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
282  interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;
283  s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
284  s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;
285 
286  if ((ret = read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
287  avctx->extradata_size - 4)) < 0)
288  return ret;
289  }else{
290  switch (avctx->bits_per_coded_sample & 7) {
291  case 1:
292  s->predictor = LEFT;
293  s->decorrelate = 0;
294  break;
295  case 2:
296  s->predictor = LEFT;
297  s->decorrelate = 1;
298  break;
299  case 3:
300  s->predictor = PLANE;
301  s->decorrelate = avctx->bits_per_coded_sample >= 24;
302  break;
303  case 4:
304  s->predictor = MEDIAN;
305  s->decorrelate = 0;
306  break;
307  default:
308  s->predictor = LEFT; //OLD
309  s->decorrelate = 0;
310  break;
311  }
312  s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
313  s->context = 0;
314 
315  if ((ret = read_old_huffman_tables(s)) < 0)
316  return ret;
317  }
318 
319  switch (s->bitstream_bpp) {
320  case 12:
321  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
322  break;
323  case 16:
324  if (s->yuy2) {
325  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
326  } else {
327  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
328  }
329  break;
330  case 24:
331  case 32:
332  if (s->bgr32) {
333  avctx->pix_fmt = AV_PIX_FMT_RGB32;
334  } else {
335  avctx->pix_fmt = AV_PIX_FMT_BGR24;
336  }
337  break;
338  default:
339  return AVERROR_INVALIDDATA;
340  }
341 
342  if ((ret = ff_huffyuv_alloc_temp(s)) < 0)
343  return ret;
344 
345  return 0;
346 }
347 
349 {
350  HYuvContext *s = avctx->priv_data;
351  int i, ret;
352 
353  if ((ret = ff_huffyuv_alloc_temp(s)) < 0)
354  return ret;
355 
356  for (i = 0; i < 6; i++)
357  s->vlc[i].table = NULL;
358 
359  if (s->version == 2) {
360  if ((ret = read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
361  avctx->extradata_size)) < 0)
362  return ret;
363  } else {
364  if ((ret = read_old_huffman_tables(s)) < 0)
365  return ret;
366  }
367 
368  return 0;
369 }
370 
371 /* TODO instead of restarting the read when the code isn't in the first level
372  * of the joint table, jump into the 2nd level of the individual table. */
373 #define READ_2PIX(dst0, dst1, plane1){\
374  uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\
375  if(code != 0xffff){\
376  dst0 = code>>8;\
377  dst1 = code;\
378  }else{\
379  dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\
380  dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\
381  }\
382 }
383 
384 static void decode_422_bitstream(HYuvContext *s, int count)
385 {
386  int i;
387 
388  count /= 2;
389 
390  if (count >= (get_bits_left(&s->gb)) / (31 * 4)) {
391  for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
392  READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
393  READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
394  }
395  } else {
396  for (i = 0; i < count; i++) {
397  READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
398  READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
399  }
400  }
401 }
402 
403 static void decode_gray_bitstream(HYuvContext *s, int count)
404 {
405  int i;
406 
407  count/=2;
408 
409  if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
410  for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
411  READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
412  }
413  } else {
414  for(i=0; i<count; i++){
415  READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
416  }
417  }
418 }
419 
420 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
421  int decorrelate, int alpha)
422 {
423  int i;
424  for (i = 0; i < count; i++) {
425  int code = get_vlc2(&s->gb, s->vlc[3].table, VLC_BITS, 1);
426  if (code != -1) {
427  *(uint32_t*)&s->temp[0][4 * i] = s->pix_bgr_map[code];
428  } else if(decorrelate) {
429  s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
430  s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) +
431  s->temp[0][4 * i + G];
432  s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) +
433  s->temp[0][4 * i + G];
434  } else {
435  s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
436  s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
437  s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
438  }
439  if (alpha)
440  s->temp[0][4 * i + A] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
441  }
442 }
443 
444 static void decode_bgr_bitstream(HYuvContext *s, int count)
445 {
446  if (s->decorrelate) {
447  if (s->bitstream_bpp==24)
448  decode_bgr_1(s, count, 1, 0);
449  else
450  decode_bgr_1(s, count, 1, 1);
451  } else {
452  if (s->bitstream_bpp==24)
453  decode_bgr_1(s, count, 0, 0);
454  else
455  decode_bgr_1(s, count, 0, 1);
456  }
457 }
458 
459 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
460 {
461  int h, cy, i;
462  int offset[AV_NUM_DATA_POINTERS];
463 
464  if (s->avctx->draw_horiz_band==NULL)
465  return;
466 
467  h = y - s->last_slice_end;
468  y -= h;
469 
470  if (s->bitstream_bpp == 12) {
471  cy = y>>1;
472  } else {
473  cy = y;
474  }
475 
476  offset[0] = frame->linesize[0] * y;
477  offset[1] = frame->linesize[1] * cy;
478  offset[2] = frame->linesize[2] * cy;
479  for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
480  offset[i] = 0;
481  emms_c();
482 
483  s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
484 
485  s->last_slice_end = y + h;
486 }
487 
488 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
489  AVPacket *avpkt)
490 {
491  const uint8_t *buf = avpkt->data;
492  int buf_size = avpkt->size;
493  HYuvContext *s = avctx->priv_data;
494  const int width = s->width;
495  const int width2 = s->width>>1;
496  const int height = s->height;
497  int fake_ystride, fake_ustride, fake_vstride;
498  ThreadFrame frame = { .f = data };
499  AVFrame * const p = data;
500  int table_size = 0, ret;
501 
504  buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
505  if (!s->bitstream_buffer)
506  return AVERROR(ENOMEM);
507 
508  memset(s->bitstream_buffer + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
509  s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer,
510  (const uint32_t*)buf, buf_size / 4);
511 
512  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) {
513  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
514  return ret;
515  }
516 
517  if (s->context) {
518  table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
519  if (table_size < 0)
520  return table_size;
521  }
522 
523  if ((unsigned)(buf_size-table_size) >= INT_MAX / 8)
524  return -1;
525 
526  if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
527  (buf_size - table_size) * 8)) < 0)
528  return ret;
529 
530  fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
531  fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
532  fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
533 
534  s->last_slice_end = 0;
535 
536  if (s->bitstream_bpp < 24) {
537  int y, cy;
538  int lefty, leftu, leftv;
539  int lefttopy, lefttopu, lefttopv;
540 
541  if (s->yuy2) {
542  p->data[0][3] = get_bits(&s->gb, 8);
543  p->data[0][2] = get_bits(&s->gb, 8);
544  p->data[0][1] = get_bits(&s->gb, 8);
545  p->data[0][0] = get_bits(&s->gb, 8);
546 
547  av_log(avctx, AV_LOG_ERROR,
548  "YUY2 output is not implemented yet\n");
549  return -1;
550  } else {
551 
552  leftv = p->data[2][0] = get_bits(&s->gb, 8);
553  lefty = p->data[0][1] = get_bits(&s->gb, 8);
554  leftu = p->data[1][0] = get_bits(&s->gb, 8);
555  p->data[0][0] = get_bits(&s->gb, 8);
556 
557  switch (s->predictor) {
558  case LEFT:
559  case PLANE:
560  decode_422_bitstream(s, width-2);
561  lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);
562  if (!(s->flags&CODEC_FLAG_GRAY)) {
563  leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
564  leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
565  }
566 
567  for (cy = y = 1; y < s->height; y++, cy++) {
568  uint8_t *ydst, *udst, *vdst;
569 
570  if (s->bitstream_bpp == 12) {
571  decode_gray_bitstream(s, width);
572 
573  ydst = p->data[0] + p->linesize[0] * y;
574 
575  lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
576  if (s->predictor == PLANE) {
577  if (y > s->interlaced)
578  s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
579  }
580  y++;
581  if (y >= s->height) break;
582  }
583 
584  draw_slice(s, p, y);
585 
586  ydst = p->data[0] + p->linesize[0]*y;
587  udst = p->data[1] + p->linesize[1]*cy;
588  vdst = p->data[2] + p->linesize[2]*cy;
589 
590  decode_422_bitstream(s, width);
591  lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
592  if (!(s->flags & CODEC_FLAG_GRAY)) {
593  leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);
594  leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);
595  }
596  if (s->predictor == PLANE) {
597  if (cy > s->interlaced) {
598  s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
599  if (!(s->flags & CODEC_FLAG_GRAY)) {
600  s->dsp.add_bytes(udst, udst - fake_ustride, width2);
601  s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);
602  }
603  }
604  }
605  }
606  draw_slice(s, p, height);
607 
608  break;
609  case MEDIAN:
610  /* first line except first 2 pixels is left predicted */
611  decode_422_bitstream(s, width - 2);
612  lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width - 2, lefty);
613  if (!(s->flags & CODEC_FLAG_GRAY)) {
614  leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
615  leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
616  }
617 
618  cy = y = 1;
619 
620  /* second line is left predicted for interlaced case */
621  if (s->interlaced) {
622  decode_422_bitstream(s, width);
623  lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);
624  if (!(s->flags & CODEC_FLAG_GRAY)) {
625  leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
626  leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
627  }
628  y++; cy++;
629  }
630 
631  /* next 4 pixels are left predicted too */
632  decode_422_bitstream(s, 4);
633  lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);
634  if (!(s->flags&CODEC_FLAG_GRAY)) {
635  leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
636  leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
637  }
638 
639  /* next line except the first 4 pixels is median predicted */
640  lefttopy = p->data[0][3];
641  decode_422_bitstream(s, width - 4);
642  s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);
643  if (!(s->flags&CODEC_FLAG_GRAY)) {
644  lefttopu = p->data[1][1];
645  lefttopv = p->data[2][1];
646  s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
647  s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
648  }
649  y++; cy++;
650 
651  for (; y<height; y++, cy++) {
652  uint8_t *ydst, *udst, *vdst;
653 
654  if (s->bitstream_bpp == 12) {
655  while (2 * cy > y) {
656  decode_gray_bitstream(s, width);
657  ydst = p->data[0] + p->linesize[0] * y;
658  s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
659  y++;
660  }
661  if (y >= height) break;
662  }
663  draw_slice(s, p, y);
664 
665  decode_422_bitstream(s, width);
666 
667  ydst = p->data[0] + p->linesize[0] * y;
668  udst = p->data[1] + p->linesize[1] * cy;
669  vdst = p->data[2] + p->linesize[2] * cy;
670 
671  s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
672  if (!(s->flags & CODEC_FLAG_GRAY)) {
673  s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
674  s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
675  }
676  }
677 
678  draw_slice(s, p, height);
679  break;
680  }
681  }
682  } else {
683  int y;
684  int leftr, leftg, leftb, lefta;
685  const int last_line = (height - 1) * p->linesize[0];
686 
687  if (s->bitstream_bpp == 32) {
688  lefta = p->data[0][last_line+A] = get_bits(&s->gb, 8);
689  leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
690  leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
691  leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
692  } else {
693  leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
694  leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
695  leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
696  lefta = p->data[0][last_line+A] = 255;
697  skip_bits(&s->gb, 8);
698  }
699 
700  if (s->bgr32) {
701  switch (s->predictor) {
702  case LEFT:
703  case PLANE:
704  decode_bgr_bitstream(s, width - 1);
705  s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width - 1, &leftr, &leftg, &leftb, &lefta);
706 
707  for (y = s->height - 2; y >= 0; y--) { //Yes it is stored upside down.
708  decode_bgr_bitstream(s, width);
709 
710  s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);
711  if (s->predictor == PLANE) {
712  if (s->bitstream_bpp != 32) lefta = 0;
713  if ((y & s->interlaced) == 0 &&
714  y < s->height - 1 - s->interlaced) {
715  s->dsp.add_bytes(p->data[0] + p->linesize[0] * y,
716  p->data[0] + p->linesize[0] * y +
717  fake_ystride, fake_ystride);
718  }
719  }
720  }
721  // just 1 large slice as this is not possible in reverse order
722  draw_slice(s, p, height);
723  break;
724  default:
725  av_log(avctx, AV_LOG_ERROR,
726  "prediction type not supported!\n");
727  }
728  }else{
729  av_log(avctx, AV_LOG_ERROR,
730  "BGR24 output is not implemented yet\n");
731  return -1;
732  }
733  }
734  emms_c();
735 
736  *got_frame = 1;
737 
738  return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
739 }
740 
742 {
743  HYuvContext *s = avctx->priv_data;
744  int i;
745 
748 
749  for (i = 0; i < 6; i++) {
750  ff_free_vlc(&s->vlc[i]);
751  }
752 
753  return 0;
754 }
755 
756 #if CONFIG_HUFFYUV_DECODER
757 AVCodec ff_huffyuv_decoder = {
758  .name = "huffyuv",
759  .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
760  .type = AVMEDIA_TYPE_VIDEO,
761  .id = AV_CODEC_ID_HUFFYUV,
762  .priv_data_size = sizeof(HYuvContext),
763  .init = decode_init,
764  .close = decode_end,
765  .decode = decode_frame,
766  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
769 };
770 #endif
771 
772 #if CONFIG_FFVHUFF_DECODER
773 AVCodec ff_ffvhuff_decoder = {
774  .name = "ffvhuff",
775  .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
776  .type = AVMEDIA_TYPE_VIDEO,
777  .id = AV_CODEC_ID_FFVHUFF,
778  .priv_data_size = sizeof(HYuvContext),
779  .init = decode_init,
780  .close = decode_end,
781  .decode = decode_frame,
782  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
785 };
786 #endif
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
#define AV_NUM_DATA_POINTERS
Definition: frame.h:108
This structure describes decoded (raw) audio or video data.
Definition: frame.h:107
int yuy2
Definition: huffyuv.h:68
void(* add_hfyu_left_prediction_bgr32)(uint8_t *dst, const uint8_t *src, int w, int *red, int *green, int *blue, int *alpha)
Definition: dsputil.h:201
#define B
Definition: dsputil.c:1836
int bitstream_bpp
Definition: huffyuv.h:66
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
AVFrame * f
Definition: thread.h:36
static void decode_422_bitstream(HYuvContext *s, int count)
Definition: huffyuvdec.c:384
int size
Definition: avcodec.h:974
static av_always_inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha)
Definition: huffyuvdec.c:420
#define VLC_BITS
Definition: asvdec.c:36
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
static int read_len_table(uint8_t *dst, GetBitContext *gb)
Definition: huffyuvdec.c:88
static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
Definition: huffyuvdec.c:348
int context
Definition: huffyuv.h:72
unsigned int bitstream_buffer_size
Definition: huffyuv.h:82
void ff_huffyuv_common_end(HYuvContext *s)
Definition: huffyuv.c:89
static int generate_joint_tables(HYuvContext *s)
Definition: huffyuvdec.c:107
AVCodec.
Definition: avcodec.h:2755
int height
Definition: huffyuv.h:70
uint8_t len[3][256]
Definition: huffyuv.h:77
#define READ_2PIX(dst0, dst1, plane1)
Definition: huffyuvdec.c:373
static int read_old_huffman_tables(HYuvContext *s)
Definition: huffyuvdec.c:209
static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
Definition: huffyuvdec.c:459
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:269
uint32_t pix_bgr_map[1<< VLC_BITS]
Definition: huffyuv.h:79
int ff_init_vlc_sparse(VLC *vlc, 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:266
uint8_t bits
Definition: crc.c:216
uint8_t
#define av_cold
Definition: attributes.h:66
static void decode_bgr_bitstream(HYuvContext *s, int count)
Definition: huffyuvdec.c:444
Multithreading support functions.
#define b
Definition: input.c:52
#define emms_c()
Definition: internal.h:46
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
VLC vlc[6]
Definition: huffyuv.h:80
void(* add_bytes)(uint8_t *dst, uint8_t *src, int w)
Definition: dsputil.h:192
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:711
const char data[16]
Definition: mxf.c:66
#define R
Definition: dsputil.c:1838
uint8_t * data
Definition: avcodec.h:973
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:194
bitstream reader API header.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2481
#define r
Definition: input.c:51
av_cold int ff_huffyuv_alloc_temp(HYuvContext *s)
Definition: huffyuv.c:57
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
Definition: huffyuv.h:55
static const unsigned char classic_add_luma[256]
Definition: huffyuvdec.c:50
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: dsputil.h:202
#define AVERROR(e)
Definition: error.h:43
uint8_t * bitstream_buffer
Definition: huffyuv.h:81
int flags
Definition: huffyuv.h:71
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:142
g
Definition: yuv2rgb.c:535
int bgr32
Definition: huffyuv.h:69
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
int(* add_hfyu_left_prediction)(uint8_t *dst, const uint8_t *src, int w, int left)
Definition: dsputil.h:200
const char * name
Name of the codec implementation.
Definition: avcodec.h:2762
huffyuv codec for libavcodec.
#define classic_shift_chroma_table_size
Definition: huffyuvdec.c:43
Definition: get_bits.h:64
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:182
uint32_t bits[3][256]
Definition: huffyuv.h:78
static const unsigned char classic_shift_luma[classic_shift_luma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
Definition: huffyuvdec.c:37
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:509
void(* add_hfyu_median_prediction)(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top)
Definition: dsputil.h:199
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:1281
int decorrelate
Definition: huffyuv.h:65
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:705
int width
Definition: huffyuv.h:70
int last_slice_end
Definition: huffyuv.h:74
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:522
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:68
uint8_t * temp[3]
Definition: huffyuv.h:75
static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
Definition: huffyuvdec.c:44
static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
Definition: takdec.c:555
Definition: vf_drawbox.c:37
if(ac->has_optimized_func)
NULL
Definition: eval.c:55
static int width
Definition: utils.c:156
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:125
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1054
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:489
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:206
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:66
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:424
int interlaced
Definition: huffyuv.h:64
int extradata_size
Definition: avcodec.h:1163
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:263
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
static void decode_gray_bitstream(HYuvContext *s, int count)
Definition: huffyuvdec.c:403
#define classic_shift_luma_table_size
Definition: huffyuvdec.c:36
int version
Definition: huffyuv.h:67
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:113
Predictor predictor
Definition: huffyuv.h:61
static av_cold int decode_init(AVCodecContext *avctx)
Definition: huffyuvdec.c:249
int height
Definition: gxfenc.c:72
AVCodecContext * avctx
Definition: huffyuv.h:60
GetBitContext gb
Definition: huffyuv.h:62
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:368
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
Definition: huffyuv.h:56
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:782
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:670
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: huffyuvdec.c:488
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:498
av_cold void ff_huffyuv_common_init(AVCodecContext *avctx)
Definition: huffyuv.c:75
static av_cold int decode_end(AVCodecContext *avctx)
Definition: huffyuvdec.c:741
void * priv_data
Definition: avcodec.h:1090
int len
static const unsigned char classic_add_chroma[256]
Definition: huffyuvdec.c:69
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
#define G
Definition: dsputil.c:1837
#define av_always_inline
Definition: attributes.h:40
#define LEFT
Definition: cdgraphics.c:163
DSPContext dsp
Definition: huffyuv.h:83
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333
static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
Definition: huffyuvdec.c:184
for(j=16;j >0;--j)
int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table)
Definition: huffyuv.c:38