FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
rv40.c
Go to the documentation of this file.
1 /*
2  * RV40 decoder
3  * Copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * RV40 decoder
25  */
26 
27 #include "libavutil/imgutils.h"
28 
29 #include "avcodec.h"
30 #include "mpegutils.h"
31 #include "mpegvideo.h"
32 #include "golomb.h"
33 
34 #include "rv34.h"
35 #include "rv40vlc2.h"
36 #include "rv40data.h"
37 
41 
42 static const int16_t mode2_offs[] = {
43  0, 614, 1222, 1794, 2410, 3014, 3586, 4202, 4792, 5382, 5966, 6542,
44  7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814
45 };
46 
47 /**
48  * Initialize all tables.
49  */
50 static av_cold void rv40_init_tables(void)
51 {
52  int i;
53  static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2];
54  static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2];
55  static VLC_TYPE aic_mode2_table[11814][2];
56  static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2];
57  static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2];
58 
59  aic_top_vlc.table = aic_table;
60  aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS;
61  init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE,
64  for(i = 0; i < AIC_MODE1_NUM; i++){
65  // Every tenth VLC table is empty
66  if((i % 10) == 9) continue;
67  aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS];
68  aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS;
69  init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE,
70  aic_mode1_vlc_bits[i], 1, 1,
72  }
73  for(i = 0; i < AIC_MODE2_NUM; i++){
74  aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]];
75  aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i];
76  init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE,
77  aic_mode2_vlc_bits[i], 1, 1,
79  }
80  for(i = 0; i < NUM_PTYPE_VLCS; i++){
81  ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS];
82  ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS;
84  ptype_vlc_bits[i], 1, 1,
85  ptype_vlc_codes[i], 1, 1,
87  }
88  for(i = 0; i < NUM_BTYPE_VLCS; i++){
89  btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS];
90  btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS;
92  btype_vlc_bits[i], 1, 1,
93  btype_vlc_codes[i], 1, 1,
95  }
96 }
97 
98 /**
99  * Get stored dimension from bitstream.
100  *
101  * If the width/height is the standard one then it's coded as a 3-bit index.
102  * Otherwise it is coded as escaped 8-bit portions.
103  */
104 static int get_dimension(GetBitContext *gb, const int *dim)
105 {
106  int t = get_bits(gb, 3);
107  int val = dim[t];
108  if(val < 0)
109  val = dim[get_bits1(gb) - val];
110  if(!val){
111  do{
112  t = get_bits(gb, 8);
113  val += t << 2;
114  }while(t == 0xFF);
115  }
116  return val;
117 }
118 
119 /**
120  * Get encoded picture size - usually this is called from rv40_parse_slice_header.
121  */
122 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
123 {
126 }
127 
129 {
130  int mb_bits;
131  int w = r->s.width, h = r->s.height;
132  int mb_size;
133  int ret;
134 
135  memset(si, 0, sizeof(SliceInfo));
136  if(get_bits1(gb))
137  return AVERROR_INVALIDDATA;
138  si->type = get_bits(gb, 2);
139  if(si->type == 1) si->type = 0;
140  si->quant = get_bits(gb, 5);
141  if(get_bits(gb, 2))
142  return AVERROR_INVALIDDATA;
143  si->vlc_set = get_bits(gb, 2);
144  skip_bits1(gb);
145  si->pts = get_bits(gb, 13);
146  if(!si->type || !get_bits1(gb))
147  rv40_parse_picture_size(gb, &w, &h);
148  if ((ret = av_image_check_size(w, h, 0, r->s.avctx)) < 0)
149  return ret;
150  si->width = w;
151  si->height = h;
152  mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
153  mb_bits = ff_rv34_get_start_offset(gb, mb_size);
154  si->start = get_bits(gb, mb_bits);
155 
156  return 0;
157 }
158 
159 /**
160  * Decode 4x4 intra types array.
161  */
163 {
164  MpegEncContext *s = &r->s;
165  int i, j, k, v;
166  int A, B, C;
167  int pattern;
168  int8_t *ptr;
169 
170  for(i = 0; i < 4; i++, dst += r->intra_types_stride){
171  if(!i && s->first_slice_line){
172  pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1);
173  dst[0] = (pattern >> 2) & 2;
174  dst[1] = (pattern >> 1) & 2;
175  dst[2] = pattern & 2;
176  dst[3] = (pattern << 1) & 2;
177  continue;
178  }
179  ptr = dst;
180  for(j = 0; j < 4; j++){
181  /* Coefficients are read using VLC chosen by the prediction pattern
182  * The first one (used for retrieving a pair of coefficients) is
183  * constructed from the top, top right and left coefficients
184  * The second one (used for retrieving only one coefficient) is
185  * top + 10 * left.
186  */
187  A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row
188  B = ptr[-r->intra_types_stride];
189  C = ptr[-1];
190  pattern = A + (B << 4) + (C << 8);
191  for(k = 0; k < MODE2_PATTERNS_NUM; k++)
192  if(pattern == rv40_aic_table_index[k])
193  break;
194  if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
195  v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2);
196  *ptr++ = v/9;
197  *ptr++ = v%9;
198  j++;
199  }else{
200  if(B != -1 && C != -1)
201  v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1);
202  else{ // tricky decoding
203  v = 0;
204  switch(C){
205  case -1: // code 0 -> 1, 1 -> 0
206  if(B < 2)
207  v = get_bits1(gb) ^ 1;
208  break;
209  case 0:
210  case 2: // code 0 -> 2, 1 -> 0
211  v = (get_bits1(gb) ^ 1) << 1;
212  break;
213  }
214  }
215  *ptr++ = v;
216  }
217  }
218  }
219  return 0;
220 }
221 
222 /**
223  * Decode macroblock information.
224  */
226 {
227  MpegEncContext *s = &r->s;
228  GetBitContext *gb = &s->gb;
229  int q, i;
230  int prev_type = 0;
231  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
232 
233  if(!r->s.mb_skip_run) {
234  r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1;
235  if(r->s.mb_skip_run > (unsigned)s->mb_num)
236  return -1;
237  }
238 
239  if(--r->s.mb_skip_run)
240  return RV34_MB_SKIP;
241 
242  if(r->avail_cache[6-4]){
243  int blocks[RV34_MB_TYPES] = {0};
244  int count = 0;
245  if(r->avail_cache[6-1])
246  blocks[r->mb_type[mb_pos - 1]]++;
247  blocks[r->mb_type[mb_pos - s->mb_stride]]++;
248  if(r->avail_cache[6-2])
249  blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
250  if(r->avail_cache[6-5])
251  blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
252  for(i = 0; i < RV34_MB_TYPES; i++){
253  if(blocks[i] > count){
254  count = blocks[i];
255  prev_type = i;
256  if(count>1)
257  break;
258  }
259  }
260  } else if (r->avail_cache[6-1])
261  prev_type = r->mb_type[mb_pos - 1];
262 
263  if(s->pict_type == AV_PICTURE_TYPE_P){
264  prev_type = block_num_to_ptype_vlc_num[prev_type];
265  q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
266  if(q < PBTYPE_ESCAPE)
267  return q;
268  q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
269  av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
270  }else{
271  prev_type = block_num_to_btype_vlc_num[prev_type];
272  q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
273  if(q < PBTYPE_ESCAPE)
274  return q;
275  q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
276  av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
277  }
278  return 0;
279 }
280 
286 };
287 
288 #define MASK_CUR 0x0001
289 #define MASK_RIGHT 0x0008
290 #define MASK_BOTTOM 0x0010
291 #define MASK_TOP 0x1000
292 #define MASK_Y_TOP_ROW 0x000F
293 #define MASK_Y_LAST_ROW 0xF000
294 #define MASK_Y_LEFT_COL 0x1111
295 #define MASK_Y_RIGHT_COL 0x8888
296 #define MASK_C_TOP_ROW 0x0003
297 #define MASK_C_LAST_ROW 0x000C
298 #define MASK_C_LEFT_COL 0x0005
299 #define MASK_C_RIGHT_COL 0x000A
300 
301 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 };
302 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 };
303 
305  uint8_t *src, int stride, int dmode,
306  int lim_q1, int lim_p1,
307  int alpha, int beta, int beta2,
308  int chroma, int edge, int dir)
309 {
310  int filter_p1, filter_q1;
311  int strong;
312  int lims;
313 
314  strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2,
315  edge, &filter_p1, &filter_q1);
316 
317  lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
318 
319  if (strong) {
321  lims, dmode, chroma);
322  } else if (filter_p1 & filter_q1) {
323  rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta,
324  lims, lim_q1, lim_p1);
325  } else if (filter_p1 | filter_q1) {
326  rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1,
327  alpha, beta, lims >> 1, lim_q1 >> 1,
328  lim_p1 >> 1);
329  }
330 }
331 
332 /**
333  * RV40 loop filtering function
334  */
335 static void rv40_loop_filter(RV34DecContext *r, int row)
336 {
337  MpegEncContext *s = &r->s;
338  int mb_pos, mb_x;
339  int i, j, k;
340  uint8_t *Y, *C;
341  int alpha, beta, betaY, betaC;
342  int q;
343  int mbtype[4]; ///< current macroblock and its neighbours types
344  /**
345  * flags indicating that macroblock can be filtered with strong filter
346  * it is set only for intra coded MB and MB with DCs coded separately
347  */
348  int mb_strong[4];
349  int clip[4]; ///< MB filter clipping value calculated from filtering strength
350  /**
351  * coded block patterns for luma part of current macroblock and its neighbours
352  * Format:
353  * LSB corresponds to the top left block,
354  * each nibble represents one row of subblocks.
355  */
356  int cbp[4];
357  /**
358  * coded block patterns for chroma part of current macroblock and its neighbours
359  * Format is the same as for luma with two subblocks in a row.
360  */
361  int uvcbp[4][2];
362  /**
363  * This mask represents the pattern of luma subblocks that should be filtered
364  * in addition to the coded ones because they lie at the edge of
365  * 8x8 block with different enough motion vectors
366  */
367  unsigned mvmasks[4];
368 
369  mb_pos = row * s->mb_stride;
370  for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
371  int mbtype = s->current_picture_ptr->mb_type[mb_pos];
372  if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
373  r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
374  if(IS_INTRA(mbtype))
375  r->cbp_chroma[mb_pos] = 0xFF;
376  }
377  mb_pos = row * s->mb_stride;
378  for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
379  int y_h_deblock, y_v_deblock;
380  int c_v_deblock[2], c_h_deblock[2];
381  int clip_left;
382  int avail[4];
383  unsigned y_to_deblock;
384  int c_to_deblock[2];
385 
386  q = s->current_picture_ptr->qscale_table[mb_pos];
387  alpha = rv40_alpha_tab[q];
388  beta = rv40_beta_tab [q];
389  betaY = betaC = beta * 3;
390  if(s->width * s->height <= 176*144)
391  betaY += beta;
392 
393  avail[0] = 1;
394  avail[1] = row;
395  avail[2] = mb_x;
396  avail[3] = row < s->mb_height - 1;
397  for(i = 0; i < 4; i++){
398  if(avail[i]){
399  int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
400  mvmasks[i] = r->deblock_coefs[pos];
401  mbtype [i] = s->current_picture_ptr->mb_type[pos];
402  cbp [i] = r->cbp_luma[pos];
403  uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
404  uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
405  }else{
406  mvmasks[i] = 0;
407  mbtype [i] = mbtype[0];
408  cbp [i] = 0;
409  uvcbp[i][0] = uvcbp[i][1] = 0;
410  }
411  mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
412  clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
413  }
414  y_to_deblock = mvmasks[POS_CUR]
415  | (mvmasks[POS_BOTTOM] << 16);
416  /* This pattern contains bits signalling that horizontal edges of
417  * the current block can be filtered.
418  * That happens when either of adjacent subblocks is coded or lies on
419  * the edge of 8x8 blocks with motion vectors differing by more than
420  * 3/4 pel in any component (any edge orientation for some reason).
421  */
422  y_h_deblock = y_to_deblock
423  | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW)
424  | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12);
425  /* This pattern contains bits signalling that vertical edges of
426  * the current block can be filtered.
427  * That happens when either of adjacent subblocks is coded or lies on
428  * the edge of 8x8 blocks with motion vectors differing by more than
429  * 3/4 pel in any component (any edge orientation for some reason).
430  */
431  y_v_deblock = y_to_deblock
432  | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL)
433  | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
434  if(!mb_x)
435  y_v_deblock &= ~MASK_Y_LEFT_COL;
436  if(!row)
437  y_h_deblock &= ~MASK_Y_TOP_ROW;
438  if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
439  y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
440  /* Calculating chroma patterns is similar and easier since there is
441  * no motion vector pattern for them.
442  */
443  for(i = 0; i < 2; i++){
444  c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
445  c_v_deblock[i] = c_to_deblock[i]
446  | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL)
447  | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1);
448  c_h_deblock[i] = c_to_deblock[i]
449  | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2)
450  | (uvcbp[POS_CUR][i] << 2);
451  if(!mb_x)
452  c_v_deblock[i] &= ~MASK_C_LEFT_COL;
453  if(!row)
454  c_h_deblock[i] &= ~MASK_C_TOP_ROW;
455  if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
456  c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
457  }
458 
459  for(j = 0; j < 16; j += 4){
460  Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
461  for(i = 0; i < 4; i++, Y += 4){
462  int ij = i + j;
463  int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
464  int dither = j ? ij : i*4;
465 
466  // if bottom block is coded then we can filter its top edge
467  // (or bottom edge of this block, which is the same)
468  if(y_h_deblock & (MASK_BOTTOM << ij)){
470  s->linesize, dither,
471  y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
472  clip_cur, alpha, beta, betaY,
473  0, 0, 0);
474  }
475  // filter left block edge in ordinary mode (with low filtering strength)
476  if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
477  if(!i)
478  clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
479  else
480  clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
481  rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
482  clip_cur,
483  clip_left,
484  alpha, beta, betaY, 0, 0, 1);
485  }
486  // filter top edge of the current macroblock when filtering strength is high
487  if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
488  rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
489  clip_cur,
490  mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
491  alpha, beta, betaY, 0, 1, 0);
492  }
493  // filter left block edge in edge mode (with high filtering strength)
494  if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
495  clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
496  rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
497  clip_cur,
498  clip_left,
499  alpha, beta, betaY, 0, 1, 1);
500  }
501  }
502  }
503  for(k = 0; k < 2; k++){
504  for(j = 0; j < 2; j++){
505  C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
506  for(i = 0; i < 2; i++, C += 4){
507  int ij = i + j*2;
508  int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
509  if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
510  int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
512  clip_bot,
513  clip_cur,
514  alpha, beta, betaC, 1, 0, 0);
515  }
516  if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
517  if(!i)
518  clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
519  else
520  clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
521  rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
522  clip_cur,
523  clip_left,
524  alpha, beta, betaC, 1, 0, 1);
525  }
526  if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
527  int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
528  rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8,
529  clip_cur,
530  clip_top,
531  alpha, beta, betaC, 1, 1, 0);
532  }
533  if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
534  clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
535  rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
536  clip_cur,
537  clip_left,
538  alpha, beta, betaC, 1, 1, 1);
539  }
540  }
541  }
542  }
543  }
544 }
545 
546 /**
547  * Initialize decoder.
548  */
550 {
551  RV34DecContext *r = avctx->priv_data;
552  int ret;
553 
554  r->rv30 = 0;
555  if ((ret = ff_rv34_decode_init(avctx)) < 0)
556  return ret;
557  if(!aic_top_vlc.bits)
565  return 0;
566 }
567 
569  .name = "rv40",
570  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"),
571  .type = AVMEDIA_TYPE_VIDEO,
572  .id = AV_CODEC_ID_RV40,
573  .priv_data_size = sizeof(RV34DecContext),
575  .close = ff_rv34_decode_end,
577  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
579  .flush = ff_mpeg_flush,
580  .pix_fmts = (const enum AVPixelFormat[]) {
583  },
586 };
int vlc_set
VLCs used for this slice.
Definition: rv34.h:76
const char const char void * val
Definition: avisynth_c.h:634
float v
static const uint8_t btype_vlc_codes[NUM_BTYPE_VLCS][BTYPE_VLC_SIZE]
Definition: rv40vlc2.h:679
const char * s
Definition: avisynth_c.h:631
#define PBTYPE_ESCAPE
Definition: rv40vlc2.h:635
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static av_cold void rv40_init_tables(void)
Initialize all tables.
Definition: rv40.c:50
AVCodec ff_rv40_decoder
Definition: rv40.c:568
int(* decode_intra_types)(struct RV34DecContext *r, GetBitContext *gb, int8_t *dst)
Definition: rv34.h:126
static void flush(AVCodecContext *avctx)
void(* loop_filter)(struct RV34DecContext *r, int row)
Definition: rv34.h:127
#define C
#define PTYPE_VLC_BITS
Definition: rv40vlc2.h:641
uint32_t avail_cache[3 *4]
8x8 block available flags (for MV prediction)
Definition: rv34.h:117
#define MASK_CUR
Definition: rv40.c:288
#define IS_SEPARATE_DC(a)
Definition: rv34.h:37
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
rv40_loop_filter_strength_func rv40_loop_filter_strength[2]
Definition: rv34dsp.h:74
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
MpegEncContext s
Definition: rv34.h:85
#define PTYPE_VLC_SIZE
Definition: rv40vlc2.h:640
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:274
int height
coded height
Definition: rv34.h:79
static unsigned svq3_get_ue_golomb(GetBitContext *gb)
Definition: golomb.h:115
#define BTYPE_VLC_SIZE
Definition: rv40vlc2.h:676
#define AIC_MODE1_SIZE
Definition: rv40vlc2.h:428
#define BTYPE_VLC_BITS
Definition: rv40vlc2.h:677
#define VLC_TYPE
Definition: get_bits.h:61
mpegvideo header.
#define MODE2_PATTERNS_NUM
Definition: rv40data.h:40
static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
Get encoded picture size - usually this is called from rv40_parse_slice_header.
Definition: rv40.c:122
RV30 and RV40 decoder common data declarations.
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:140
int start
Definition: rv34.h:77
AVCodec.
Definition: avcodec.h:3473
const uint8_t * luma_dc_quant_p
luma subblock DC quantizer for interframes
Definition: rv34.h:91
static const uint8_t rv40_beta_tab[32]
beta parameter for RV40 loop filter - almost the same as in JVT-A003r1
Definition: rv40data.h:80
static const uint8_t btype_vlc_syms[BTYPE_VLC_SIZE]
Definition: rv40vlc2.h:697
static const int neighbour_offs_x[4]
Definition: rv40.c:301
static VLC btype_vlc[NUM_BTYPE_VLCS]
Definition: rv40.c:40
static const uint8_t block_num_to_ptype_vlc_num[12]
reverse of ptype_vlc_syms
Definition: rv40vlc2.h:668
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:881
uint8_t
#define av_cold
Definition: attributes.h:74
uint16_t * cbp_luma
CBP values for luma subblocks.
Definition: rv34.h:112
#define Y
Definition: vf_boxblur.c:76
static const uint8_t aic_mode1_vlc_bits[AIC_MODE1_NUM][AIC_MODE1_SIZE]
Definition: rv40vlc2.h:532
int width
coded width
Definition: rv34.h:78
#define MASK_C_RIGHT_COL
Definition: rv40.c:299
rv40_weak_loop_filter_func rv40_weak_loop_filter[2]
Definition: rv34dsp.h:72
uint16_t * deblock_coefs
deblock coefficients for each macroblock
Definition: rv34.h:114
static const int rv40_standard_heights[]
Definition: rv40data.h:37
static const uint8_t rv40_luma_dc_quant[2][32]
luma quantizer values The second table is used for inter blocks.
Definition: rv40data.h:60
static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp, uint8_t *src, int stride, int dmode, int lim_q1, int lim_p1, int alpha, int beta, int beta2, int chroma, int edge, int dir)
Definition: rv40.c:304
Skipped block.
Definition: rv34.h:49
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:136
#define MASK_Y_LAST_ROW
Definition: rv40.c:293
#define A(x)
Definition: vp56_arith.h:28
#define av_log(a,...)
static VLC aic_mode2_vlc[AIC_MODE2_NUM]
Definition: rv40.c:39
int quant
quantizer used for this slice
Definition: rv34.h:75
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int(* parse_slice_header)(struct RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
Definition: rv34.h:124
static const uint8_t block_num_to_btype_vlc_num[12]
reverse of btype_vlc_syms
Definition: rv40vlc2.h:702
static const uint8_t rv40_filter_clip_tbl[3][32]
clip table for RV40 loop filter - the same as in JVT-A003r1
Definition: rv40data.h:85
static const struct endianess table[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * r
Definition: vf_curves.c:107
static const uint8_t dither[8][8]
Definition: vf_fspp.c:57
static int rv40_decode_mb_info(RV34DecContext *r)
Decode macroblock information.
Definition: rv40.c:225
#define MASK_Y_TOP_ROW
Definition: rv40.c:292
const char * name
Name of the codec implementation.
Definition: avcodec.h:3480
GetBitContext gb
Definition: mpegvideo.h:451
static const uint8_t ptype_vlc_syms[PTYPE_VLC_SIZE]
Definition: rv40vlc2.h:663
GLsizei count
Definition: opengl_enc.c:109
Libavcodec external API header.
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:919
#define MASK_BOTTOM
Definition: rv40.c:290
Definition: get_bits.h:63
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2753
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:214
static const uint8_t ptype_vlc_bits[NUM_PTYPE_VLCS][PTYPE_VLC_SIZE]
Definition: rv40vlc2.h:653
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:241
#define MASK_RIGHT
Definition: rv40.c:289
static VLC ptype_vlc[NUM_PTYPE_VLCS]
Definition: rv40.c:40
int * mb_type
internal macroblock types
Definition: rv34.h:97
#define MASK_C_LEFT_COL
Definition: rv40.c:298
ret
Definition: avfilter.c:974
static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
Definition: rv40.c:128
#define AIC_MODE2_NUM
codes used for determining a pair of block types
Definition: rv40vlc2.h:52
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:191
static av_cold int rv40_decode_init(AVCodecContext *avctx)
Initialize decoder.
Definition: rv40.c:549
static const uint16_t rv40_aic_table_index[MODE2_PATTERNS_NUM]
intra types table
Definition: rv40data.h:47
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:555
static const uint8_t rv40_aic_top_vlc_bits[AIC_TOP_SIZE]
Definition: rv40vlc2.h:43
#define AIC_MODE1_BITS
Definition: rv40vlc2.h:429
static VLC aic_mode1_vlc[AIC_MODE1_NUM]
Definition: rv40.c:39
#define INIT_VLC_USE_NEW_STATIC
Definition: get_bits.h:474
Definition: rv40.c:283
#define MASK_Y_LEFT_COL
Definition: rv40.c:294
#define MASK_TOP
Definition: rv40.c:291
int bits
Definition: get_bits.h:64
static const uint8_t ptype_vlc_codes[NUM_PTYPE_VLCS][PTYPE_VLC_SIZE]
Definition: rv40vlc2.h:643
int table_allocated
Definition: get_bits.h:66
int first_slice_line
used in mpeg4 too to handle resync markers
Definition: mpegvideo.h:439
int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
Definition: rv34.c:1528
AVS_Value src
Definition: avisynth_c.h:482
essential slice information
Definition: rv34.h:73
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:141
#define MASK_C_TOP_ROW
Definition: rv40.c:296
main external API structure.
Definition: avcodec.h:1501
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:107
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:457
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:304
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:329
static const uint16_t aic_mode2_vlc_codes[AIC_MODE2_NUM][AIC_MODE2_SIZE]
Definition: rv40vlc2.h:56
struct AVFrame * f
Definition: mpegpicture.h:46
#define MASK_C_LAST_ROW
Definition: rv40.c:297
static const int16_t mode2_offs[]
Definition: rv40.c:42
av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
Initialize decoder.
Definition: rv34.c:1486
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:142
int dim
int ff_rv34_decode_frame(AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt)
Definition: rv34.c:1634
int intra_types_stride
block types array stride
Definition: rv34.h:89
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:219
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
static const int rv40_standard_widths[]
standard widths and heights coded in RV40
Definition: rv40data.h:36
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
static VLC aic_top_vlc
Definition: rv40.c:38
MpegEncContext.
Definition: mpegvideo.h:88
#define AIC_TOP_SIZE
Definition: rv40vlc2.h:37
av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
Definition: rv34.c:1841
int8_t * qscale_table
Definition: mpegpicture.h:50
struct AVCodecContext * avctx
Definition: mpegvideo.h:105
int(* decode_mb_info)(struct RV34DecContext *r)
Definition: rv34.h:125
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
static const uint8_t aic_mode1_vlc_codes[AIC_MODE1_NUM][AIC_MODE1_SIZE]
Definition: rv40vlc2.h:431
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
#define MASK_Y_RIGHT_COL
Definition: rv40.c:295
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
static int get_dimension(GetBitContext *gb, const int *dim)
Get stored dimension from bitstream.
Definition: rv40.c:104
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:137
static double clip(void *opaque, double val)
Clip value val in the minval - maxval range.
Definition: vf_lut.c:150
Definition: rv40.c:282
rv40_strong_loop_filter_func rv40_strong_loop_filter[2]
Definition: rv34dsp.h:73
int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: rv34.c:1556
#define AIC_TOP_BITS
codes used for the first four block types
Definition: rv40vlc2.h:36
#define AIC_MODE2_SIZE
Definition: rv40vlc2.h:53
Definition: rv40.c:284
int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
Decode starting slice position.
Definition: rv34.c:330
#define IS_INTRA(x, y)
decoder context
Definition: rv34.h:84
void * priv_data
Definition: avcodec.h:1543
Definition: vf_geq.c:46
#define NUM_BTYPE_VLCS
tables used for P-frame macroblock type decoding
Definition: rv40vlc2.h:675
RV40BlockPos
Definition: rv40.c:281
RV40 VLC tables used for macroblock information decoding.
static const uint8_t btype_vlc_bits[NUM_BTYPE_VLCS][PTYPE_VLC_SIZE]
Definition: rv40vlc2.h:688
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
static const uint8_t rv40_alpha_tab[32]
alpha parameter for RV40 loop filter - almost the same as in JVT-A003r1
Definition: rv40data.h:73
#define AIC_MODE1_NUM
Codes used for determining block type.
Definition: rv40vlc2.h:427
const uint8_t * luma_dc_quant_i
luma subblock DC quantizer for intraframes
Definition: rv34.h:90
static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
Decode 4x4 intra types array.
Definition: rv40.c:162
#define NUM_PTYPE_VLCS
tables used for P-frame macroblock type decoding
Definition: rv40vlc2.h:639
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
int type
slice type (intra, inter)
Definition: rv34.h:74
#define AIC_MODE2_BITS
Definition: rv40vlc2.h:54
miscellaneous RV40 tables
#define stride
static const int neighbour_offs_y[4]
Definition: rv40.c:302
int rv30
indicates which RV variasnt is currently decoded
Definition: rv34.h:104
static const uint8_t rv40_aic_top_vlc_codes[AIC_TOP_SIZE]
Definition: rv40vlc2.h:38
exp golomb vlc stuff
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
RV34DSPContext rdsp
Definition: rv34.h:86
static void rv40_loop_filter(RV34DecContext *r, int row)
RV40 loop filtering function.
Definition: rv40.c:335
static const uint8_t aic_mode2_vlc_bits[AIC_MODE2_NUM][AIC_MODE2_SIZE]
Definition: rv40vlc2.h:239
Predicted.
Definition: avutil.h:275
int pts
frame timestamp
Definition: rv34.h:80
uint8_t * cbp_chroma
CBP values for chroma subblocks.
Definition: rv34.h:113