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
38 static VLC aic_top_vlc;
39 static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM];
40 static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS];
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 */
rv40_init_tables(void)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,
62 rv40_aic_top_vlc_bits, 1, 1,
63 rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
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,
71 aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
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,
78 aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
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;
83 ff_init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE,
84 ptype_vlc_bits[i], 1, 1,
85 ptype_vlc_codes[i], 1, 1,
86 ptype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
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;
91 ff_init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE,
92 btype_vlc_bits[i], 1, 1,
93 btype_vlc_codes[i], 1, 1,
94 btype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
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 */
get_dimension(GetBitContext * gb,const int * dim)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 */
rv40_parse_picture_size(GetBitContext * gb,int * w,int * h)122 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
123 {
124 *w = get_dimension(gb, rv40_standard_widths);
125 *h = get_dimension(gb, rv40_standard_heights);
126 }
127
rv40_parse_slice_header(RV34DecContext * r,GetBitContext * gb,SliceInfo * si)128 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
129 {
130 int mb_bits;
131 int w = r->s.width, h = r->s.height;
132 int mb_size;
133
134 memset(si, 0, sizeof(SliceInfo));
135 if(get_bits1(gb))
136 return -1;
137 si->type = get_bits(gb, 2);
138 if(si->type == 1) si->type = 0;
139 si->quant = get_bits(gb, 5);
140 if(get_bits(gb, 2))
141 return -1;
142 si->vlc_set = get_bits(gb, 2);
143 skip_bits1(gb);
144 si->pts = get_bits(gb, 13);
145 if(!si->type || !get_bits1(gb))
146 rv40_parse_picture_size(gb, &w, &h);
147 if(av_image_check_size(w, h, 0, r->s.avctx) < 0)
148 return -1;
149 si->width = w;
150 si->height = h;
151 mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
152 mb_bits = ff_rv34_get_start_offset(gb, mb_size);
153 si->start = get_bits(gb, mb_bits);
154
155 return 0;
156 }
157
158 /**
159 * Decode 4x4 intra types array.
160 */
rv40_decode_intra_types(RV34DecContext * r,GetBitContext * gb,int8_t * dst)161 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
162 {
163 MpegEncContext *s = &r->s;
164 int i, j, k, v;
165 int A, B, C;
166 int pattern;
167 int8_t *ptr;
168
169 for(i = 0; i < 4; i++, dst += r->intra_types_stride){
170 if(!i && s->first_slice_line){
171 pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1);
172 dst[0] = (pattern >> 2) & 2;
173 dst[1] = (pattern >> 1) & 2;
174 dst[2] = pattern & 2;
175 dst[3] = (pattern << 1) & 2;
176 continue;
177 }
178 ptr = dst;
179 for(j = 0; j < 4; j++){
180 /* Coefficients are read using VLC chosen by the prediction pattern
181 * The first one (used for retrieving a pair of coefficients) is
182 * constructed from the top, top right and left coefficients
183 * The second one (used for retrieving only one coefficient) is
184 * top + 10 * left.
185 */
186 A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row
187 B = ptr[-r->intra_types_stride];
188 C = ptr[-1];
189 pattern = A + (B << 4) + (C << 8);
190 for(k = 0; k < MODE2_PATTERNS_NUM; k++)
191 if(pattern == rv40_aic_table_index[k])
192 break;
193 if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
194 v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2);
195 *ptr++ = v/9;
196 *ptr++ = v%9;
197 j++;
198 }else{
199 if(B != -1 && C != -1)
200 v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1);
201 else{ // tricky decoding
202 v = 0;
203 switch(C){
204 case -1: // code 0 -> 1, 1 -> 0
205 if(B < 2)
206 v = get_bits1(gb) ^ 1;
207 break;
208 case 0:
209 case 2: // code 0 -> 2, 1 -> 0
210 v = (get_bits1(gb) ^ 1) << 1;
211 break;
212 }
213 }
214 *ptr++ = v;
215 }
216 }
217 }
218 return 0;
219 }
220
221 /**
222 * Decode macroblock information.
223 */
rv40_decode_mb_info(RV34DecContext * r)224 static int rv40_decode_mb_info(RV34DecContext *r)
225 {
226 MpegEncContext *s = &r->s;
227 GetBitContext *gb = &s->gb;
228 int q, i;
229 int prev_type = 0;
230 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
231
232 if(!r->s.mb_skip_run) {
233 r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1;
234 if(r->s.mb_skip_run > (unsigned)s->mb_num)
235 return -1;
236 }
237
238 if(--r->s.mb_skip_run)
239 return RV34_MB_SKIP;
240
241 if(r->avail_cache[6-4]){
242 int blocks[RV34_MB_TYPES] = {0};
243 int count = 0;
244 if(r->avail_cache[6-1])
245 blocks[r->mb_type[mb_pos - 1]]++;
246 blocks[r->mb_type[mb_pos - s->mb_stride]]++;
247 if(r->avail_cache[6-2])
248 blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
249 if(r->avail_cache[6-5])
250 blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
251 for(i = 0; i < RV34_MB_TYPES; i++){
252 if(blocks[i] > count){
253 count = blocks[i];
254 prev_type = i;
255 if(count>1)
256 break;
257 }
258 }
259 } else if (r->avail_cache[6-1])
260 prev_type = r->mb_type[mb_pos - 1];
261
262 if(s->pict_type == AV_PICTURE_TYPE_P){
263 prev_type = block_num_to_ptype_vlc_num[prev_type];
264 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
265 if(q < PBTYPE_ESCAPE)
266 return q;
267 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
268 av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
269 }else{
270 prev_type = block_num_to_btype_vlc_num[prev_type];
271 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
272 if(q < PBTYPE_ESCAPE)
273 return q;
274 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
275 av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
276 }
277 return 0;
278 }
279
280 enum RV40BlockPos{
281 POS_CUR,
282 POS_TOP,
283 POS_LEFT,
284 POS_BOTTOM,
285 };
286
287 #define MASK_CUR 0x0001
288 #define MASK_RIGHT 0x0008
289 #define MASK_BOTTOM 0x0010
290 #define MASK_TOP 0x1000
291 #define MASK_Y_TOP_ROW 0x000F
292 #define MASK_Y_LAST_ROW 0xF000
293 #define MASK_Y_LEFT_COL 0x1111
294 #define MASK_Y_RIGHT_COL 0x8888
295 #define MASK_C_TOP_ROW 0x0003
296 #define MASK_C_LAST_ROW 0x000C
297 #define MASK_C_LEFT_COL 0x0005
298 #define MASK_C_RIGHT_COL 0x000A
299
300 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 };
301 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 };
302
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)303 static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp,
304 uint8_t *src, int stride, int dmode,
305 int lim_q1, int lim_p1,
306 int alpha, int beta, int beta2,
307 int chroma, int edge, int dir)
308 {
309 int filter_p1, filter_q1;
310 int strong;
311 int lims;
312
313 strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2,
314 edge, &filter_p1, &filter_q1);
315
316 lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
317
318 if (strong) {
319 rdsp->rv40_strong_loop_filter[dir](src, stride, alpha,
320 lims, dmode, chroma);
321 } else if (filter_p1 & filter_q1) {
322 rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta,
323 lims, lim_q1, lim_p1);
324 } else if (filter_p1 | filter_q1) {
325 rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1,
326 alpha, beta, lims >> 1, lim_q1 >> 1,
327 lim_p1 >> 1);
328 }
329 }
330
331 /**
332 * RV40 loop filtering function
333 */
rv40_loop_filter(RV34DecContext * r,int row)334 static void rv40_loop_filter(RV34DecContext *r, int row)
335 {
336 MpegEncContext *s = &r->s;
337 int mb_pos, mb_x;
338 int i, j, k;
339 uint8_t *Y, *C;
340 int alpha, beta, betaY, betaC;
341 int q;
342 int mbtype[4]; ///< current macroblock and its neighbours types
343 /**
344 * flags indicating that macroblock can be filtered with strong filter
345 * it is set only for intra coded MB and MB with DCs coded separately
346 */
347 int mb_strong[4];
348 int clip[4]; ///< MB filter clipping value calculated from filtering strength
349 /**
350 * coded block patterns for luma part of current macroblock and its neighbours
351 * Format:
352 * LSB corresponds to the top left block,
353 * each nibble represents one row of subblocks.
354 */
355 int cbp[4];
356 /**
357 * coded block patterns for chroma part of current macroblock and its neighbours
358 * Format is the same as for luma with two subblocks in a row.
359 */
360 int uvcbp[4][2];
361 /**
362 * This mask represents the pattern of luma subblocks that should be filtered
363 * in addition to the coded ones because they lie at the edge of
364 * 8x8 block with different enough motion vectors
365 */
366 unsigned mvmasks[4];
367
368 mb_pos = row * s->mb_stride;
369 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
370 int mbtype = s->current_picture_ptr->mb_type[mb_pos];
371 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
372 r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
373 if(IS_INTRA(mbtype))
374 r->cbp_chroma[mb_pos] = 0xFF;
375 }
376 mb_pos = row * s->mb_stride;
377 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
378 int y_h_deblock, y_v_deblock;
379 int c_v_deblock[2], c_h_deblock[2];
380 int clip_left;
381 int avail[4];
382 unsigned y_to_deblock;
383 int c_to_deblock[2];
384
385 q = s->current_picture_ptr->qscale_table[mb_pos];
386 alpha = rv40_alpha_tab[q];
387 beta = rv40_beta_tab [q];
388 betaY = betaC = beta * 3;
389 if(s->width * s->height <= 176*144)
390 betaY += beta;
391
392 avail[0] = 1;
393 avail[1] = row;
394 avail[2] = mb_x;
395 avail[3] = row < s->mb_height - 1;
396 for(i = 0; i < 4; i++){
397 if(avail[i]){
398 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
399 mvmasks[i] = r->deblock_coefs[pos];
400 mbtype [i] = s->current_picture_ptr->mb_type[pos];
401 cbp [i] = r->cbp_luma[pos];
402 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
403 uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
404 }else{
405 mvmasks[i] = 0;
406 mbtype [i] = mbtype[0];
407 cbp [i] = 0;
408 uvcbp[i][0] = uvcbp[i][1] = 0;
409 }
410 mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
411 clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
412 }
413 y_to_deblock = mvmasks[POS_CUR]
414 | (mvmasks[POS_BOTTOM] << 16);
415 /* This pattern contains bits signalling that horizontal edges of
416 * the current block can be filtered.
417 * That happens when either of adjacent subblocks is coded or lies on
418 * the edge of 8x8 blocks with motion vectors differing by more than
419 * 3/4 pel in any component (any edge orientation for some reason).
420 */
421 y_h_deblock = y_to_deblock
422 | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW)
423 | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12);
424 /* This pattern contains bits signalling that vertical edges of
425 * the current block can be filtered.
426 * That happens when either of adjacent subblocks is coded or lies on
427 * the edge of 8x8 blocks with motion vectors differing by more than
428 * 3/4 pel in any component (any edge orientation for some reason).
429 */
430 y_v_deblock = y_to_deblock
431 | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL)
432 | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
433 if(!mb_x)
434 y_v_deblock &= ~MASK_Y_LEFT_COL;
435 if(!row)
436 y_h_deblock &= ~MASK_Y_TOP_ROW;
437 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
438 y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
439 /* Calculating chroma patterns is similar and easier since there is
440 * no motion vector pattern for them.
441 */
442 for(i = 0; i < 2; i++){
443 c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
444 c_v_deblock[i] = c_to_deblock[i]
445 | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL)
446 | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1);
447 c_h_deblock[i] = c_to_deblock[i]
448 | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2)
449 | (uvcbp[POS_CUR][i] << 2);
450 if(!mb_x)
451 c_v_deblock[i] &= ~MASK_C_LEFT_COL;
452 if(!row)
453 c_h_deblock[i] &= ~MASK_C_TOP_ROW;
454 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
455 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
456 }
457
458 for(j = 0; j < 16; j += 4){
459 Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
460 for(i = 0; i < 4; i++, Y += 4){
461 int ij = i + j;
462 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
463 int dither = j ? ij : i*4;
464
465 // if bottom block is coded then we can filter its top edge
466 // (or bottom edge of this block, which is the same)
467 if(y_h_deblock & (MASK_BOTTOM << ij)){
468 rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize,
469 s->linesize, dither,
470 y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
471 clip_cur, alpha, beta, betaY,
472 0, 0, 0);
473 }
474 // filter left block edge in ordinary mode (with low filtering strength)
475 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
476 if(!i)
477 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
478 else
479 clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
480 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
481 clip_cur,
482 clip_left,
483 alpha, beta, betaY, 0, 0, 1);
484 }
485 // filter top edge of the current macroblock when filtering strength is high
486 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
487 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
488 clip_cur,
489 mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
490 alpha, beta, betaY, 0, 1, 0);
491 }
492 // filter left block edge in edge mode (with high filtering strength)
493 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
494 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
495 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
496 clip_cur,
497 clip_left,
498 alpha, beta, betaY, 0, 1, 1);
499 }
500 }
501 }
502 for(k = 0; k < 2; k++){
503 for(j = 0; j < 2; j++){
504 C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
505 for(i = 0; i < 2; i++, C += 4){
506 int ij = i + j*2;
507 int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
508 if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
509 int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
510 rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8,
511 clip_bot,
512 clip_cur,
513 alpha, beta, betaC, 1, 0, 0);
514 }
515 if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
516 if(!i)
517 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
518 else
519 clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
520 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
521 clip_cur,
522 clip_left,
523 alpha, beta, betaC, 1, 0, 1);
524 }
525 if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
526 int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
527 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8,
528 clip_cur,
529 clip_top,
530 alpha, beta, betaC, 1, 1, 0);
531 }
532 if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
533 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
534 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
535 clip_cur,
536 clip_left,
537 alpha, beta, betaC, 1, 1, 1);
538 }
539 }
540 }
541 }
542 }
543 }
544
545 /**
546 * Initialize decoder.
547 */
rv40_decode_init(AVCodecContext * avctx)548 static av_cold int rv40_decode_init(AVCodecContext *avctx)
549 {
550 RV34DecContext *r = avctx->priv_data;
551 int ret;
552
553 r->rv30 = 0;
554 if ((ret = ff_rv34_decode_init(avctx)) < 0)
555 return ret;
556 if(!aic_top_vlc.bits)
557 rv40_init_tables();
558 r->parse_slice_header = rv40_parse_slice_header;
559 r->decode_intra_types = rv40_decode_intra_types;
560 r->decode_mb_info = rv40_decode_mb_info;
561 r->loop_filter = rv40_loop_filter;
562 r->luma_dc_quant_i = rv40_luma_dc_quant[0];
563 r->luma_dc_quant_p = rv40_luma_dc_quant[1];
564 return 0;
565 }
566
567 AVCodec ff_rv40_decoder = {
568 .name = "rv40",
569 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"),
570 .type = AVMEDIA_TYPE_VIDEO,
571 .id = AV_CODEC_ID_RV40,
572 .priv_data_size = sizeof(RV34DecContext),
573 .init = rv40_decode_init,
574 .close = ff_rv34_decode_end,
575 .decode = ff_rv34_decode_frame,
576 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY |
577 CODEC_CAP_FRAME_THREADS,
578 .flush = ff_mpeg_flush,
579 .pix_fmts = (const enum AVPixelFormat[]) {
580 AV_PIX_FMT_YUV420P,
581 AV_PIX_FMT_NONE
582 },
583 .init_thread_copy = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
584 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
585 };
586