3 * Copyright (c) 2007 Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/imgutils.h"
31 #include "mpegvideo.h"
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];
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
48 * Initialize all tables.
50 static av_cold void rv40_init_tables(void)
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];
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);
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);
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 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);
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 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);
99 * Get stored dimension from bitstream.
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.
104 static int get_dimension(GetBitContext *gb, const int *dim)
106 int t = get_bits(gb, 3);
109 val = dim[get_bits1(gb) - val];
120 * Get encoded picture size - usually this is called from rv40_parse_slice_header.
122 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
124 *w = get_dimension(gb, rv40_standard_widths);
125 *h = get_dimension(gb, rv40_standard_heights);
128 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
131 int w = r->s.width, h = r->s.height;
134 memset(si, 0, sizeof(SliceInfo));
137 si->type = get_bits(gb, 2);
138 if(si->type == 1) si->type = 0;
139 si->quant = get_bits(gb, 5);
142 si->vlc_set = get_bits(gb, 2);
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)
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);
159 * Decode 4x4 intra types array.
161 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
163 MpegEncContext *s = &r->s;
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;
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
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];
189 pattern = A + (B << 4) + (C << 8);
190 for(k = 0; k < MODE2_PATTERNS_NUM; k++)
191 if(pattern == rv40_aic_table_index[k])
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);
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
204 case -1: // code 0 -> 1, 1 -> 0
206 v = get_bits1(gb) ^ 1;
209 case 2: // code 0 -> 2, 1 -> 0
210 v = (get_bits1(gb) ^ 1) << 1;
222 * Decode macroblock information.
224 static int rv40_decode_mb_info(RV34DecContext *r)
226 MpegEncContext *s = &r->s;
227 GetBitContext *gb = &s->gb;
230 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
231 int blocks[RV34_MB_TYPES] = {0};
234 if(!r->s.mb_skip_run)
235 r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1;
237 if(--r->s.mb_skip_run)
240 if(r->avail_cache[6-1])
241 blocks[r->mb_type[mb_pos - 1]]++;
242 if(r->avail_cache[6-4]){
243 blocks[r->mb_type[mb_pos - s->mb_stride]]++;
244 if(r->avail_cache[6-2])
245 blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
246 if(r->avail_cache[6-5])
247 blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
250 for(i = 0; i < RV34_MB_TYPES; i++){
251 if(blocks[i] > count){
256 if(s->pict_type == AV_PICTURE_TYPE_P){
257 prev_type = block_num_to_ptype_vlc_num[prev_type];
258 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
259 if(q < PBTYPE_ESCAPE)
261 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1);
262 av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
264 prev_type = block_num_to_btype_vlc_num[prev_type];
265 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
266 if(q < PBTYPE_ESCAPE)
268 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1);
269 av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
274 #define CLIP_SYMM(a, b) av_clip(a, -(b), b)
276 * weaker deblocking very similar to the one described in 4.4.2 of JVT-A003r1
278 static inline void rv40_weak_loop_filter(uint8_t *src, const int step,
279 const int filter_p1, const int filter_q1,
280 const int alpha, const int beta,
282 const int lim_q1, const int lim_p1,
283 const int diff_p1p0, const int diff_q1q0,
284 const int diff_p1p2, const int diff_q1q2)
286 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
289 t = src[0*step] - src[-1*step];
292 u = (alpha * FFABS(t)) >> 7;
293 if(u > 3 - (filter_p1 && filter_q1))
297 if(filter_p1 && filter_q1)
298 t += src[-2*step] - src[1*step];
299 diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0);
300 src[-1*step] = cm[src[-1*step] + diff];
301 src[ 0*step] = cm[src[ 0*step] - diff];
302 if(FFABS(diff_p1p2) <= beta && filter_p1){
303 t = (diff_p1p0 + diff_p1p2 - diff) >> 1;
304 src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)];
306 if(FFABS(diff_q1q2) <= beta && filter_q1){
307 t = (diff_q1q0 + diff_q1q2 + diff) >> 1;
308 src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)];
312 static av_always_inline void rv40_adaptive_loop_filter(uint8_t *src, const int step,
313 const int stride, const int dmode,
314 const int lim_q1, const int lim_p1,
316 const int beta, const int beta2,
317 const int chroma, const int edge)
319 int diff_p1p0[4], diff_q1q0[4], diff_p1p2[4], diff_q1q2[4];
320 int sum_p1p0 = 0, sum_q1q0 = 0, sum_p1p2 = 0, sum_q1q2 = 0;
322 int flag_strong0 = 1, flag_strong1 = 1;
323 int filter_p1, filter_q1;
327 for(i = 0, ptr = src; i < 4; i++, ptr += stride){
328 diff_p1p0[i] = ptr[-2*step] - ptr[-1*step];
329 diff_q1q0[i] = ptr[ 1*step] - ptr[ 0*step];
330 sum_p1p0 += diff_p1p0[i];
331 sum_q1q0 += diff_q1q0[i];
333 filter_p1 = FFABS(sum_p1p0) < (beta<<2);
334 filter_q1 = FFABS(sum_q1q0) < (beta<<2);
335 if(!filter_p1 && !filter_q1)
338 for(i = 0, ptr = src; i < 4; i++, ptr += stride){
339 diff_p1p2[i] = ptr[-2*step] - ptr[-3*step];
340 diff_q1q2[i] = ptr[ 1*step] - ptr[ 2*step];
341 sum_p1p2 += diff_p1p2[i];
342 sum_q1q2 += diff_q1q2[i];
346 flag_strong0 = filter_p1 && (FFABS(sum_p1p2) < beta2);
347 flag_strong1 = filter_q1 && (FFABS(sum_q1q2) < beta2);
349 flag_strong0 = flag_strong1 = 0;
352 lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
353 if(flag_strong0 && flag_strong1){ /* strong filtering */
354 for(i = 0; i < 4; i++, src += stride){
355 int sflag, p0, q0, p1, q1;
356 int t = src[0*step] - src[-1*step];
359 sflag = (alpha * FFABS(t)) >> 7;
360 if(sflag > 1) continue;
362 p0 = (25*src[-3*step] + 26*src[-2*step]
364 + 26*src[ 0*step] + 25*src[ 1*step] + rv40_dither_l[dmode + i]) >> 7;
365 q0 = (25*src[-2*step] + 26*src[-1*step]
367 + 26*src[ 1*step] + 25*src[ 2*step] + rv40_dither_r[dmode + i]) >> 7;
369 p0 = av_clip(p0, src[-1*step] - lims, src[-1*step] + lims);
370 q0 = av_clip(q0, src[ 0*step] - lims, src[ 0*step] + lims);
372 p1 = (25*src[-4*step] + 26*src[-3*step]
374 + 26*p0 + 25*src[ 0*step] + rv40_dither_l[dmode + i]) >> 7;
375 q1 = (25*src[-1*step] + 26*q0
377 + 26*src[ 2*step] + 25*src[ 3*step] + rv40_dither_r[dmode + i]) >> 7;
379 p1 = av_clip(p1, src[-2*step] - lims, src[-2*step] + lims);
380 q1 = av_clip(q1, src[ 1*step] - lims, src[ 1*step] + lims);
387 src[-3*step] = (25*src[-1*step] + 26*src[-2*step] + 51*src[-3*step] + 26*src[-4*step] + 64) >> 7;
388 src[ 2*step] = (25*src[ 0*step] + 26*src[ 1*step] + 51*src[ 2*step] + 26*src[ 3*step] + 64) >> 7;
391 }else if(filter_p1 && filter_q1){
392 for(i = 0; i < 4; i++, src += stride)
393 rv40_weak_loop_filter(src, step, 1, 1, alpha, beta, lims, lim_q1, lim_p1,
394 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]);
396 for(i = 0; i < 4; i++, src += stride)
397 rv40_weak_loop_filter(src, step, filter_p1, filter_q1,
398 alpha, beta, lims>>1, lim_q1>>1, lim_p1>>1,
399 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]);
403 static void rv40_v_loop_filter(uint8_t *src, int stride, int dmode,
404 int lim_q1, int lim_p1,
405 int alpha, int beta, int beta2, int chroma, int edge){
406 rv40_adaptive_loop_filter(src, 1, stride, dmode, lim_q1, lim_p1,
407 alpha, beta, beta2, chroma, edge);
409 static void rv40_h_loop_filter(uint8_t *src, int stride, int dmode,
410 int lim_q1, int lim_p1,
411 int alpha, int beta, int beta2, int chroma, int edge){
412 rv40_adaptive_loop_filter(src, stride, 1, dmode, lim_q1, lim_p1,
413 alpha, beta, beta2, chroma, edge);
423 #define MASK_CUR 0x0001
424 #define MASK_RIGHT 0x0008
425 #define MASK_BOTTOM 0x0010
426 #define MASK_TOP 0x1000
427 #define MASK_Y_TOP_ROW 0x000F
428 #define MASK_Y_LAST_ROW 0xF000
429 #define MASK_Y_LEFT_COL 0x1111
430 #define MASK_Y_RIGHT_COL 0x8888
431 #define MASK_C_TOP_ROW 0x0003
432 #define MASK_C_LAST_ROW 0x000C
433 #define MASK_C_LEFT_COL 0x0005
434 #define MASK_C_RIGHT_COL 0x000A
436 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 };
437 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 };
440 * RV40 loop filtering function
442 static void rv40_loop_filter(RV34DecContext *r, int row)
444 MpegEncContext *s = &r->s;
448 int alpha, beta, betaY, betaC;
450 int mbtype[4]; ///< current macroblock and its neighbours types
452 * flags indicating that macroblock can be filtered with strong filter
453 * it is set only for intra coded MB and MB with DCs coded separately
456 int clip[4]; ///< MB filter clipping value calculated from filtering strength
458 * coded block patterns for luma part of current macroblock and its neighbours
460 * LSB corresponds to the top left block,
461 * each nibble represents one row of subblocks.
465 * coded block patterns for chroma part of current macroblock and its neighbours
466 * Format is the same as for luma with two subblocks in a row.
470 * This mask represents the pattern of luma subblocks that should be filtered
471 * in addition to the coded ones because because they lie at the edge of
472 * 8x8 block with different enough motion vectors
476 mb_pos = row * s->mb_stride;
477 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
478 int mbtype = s->current_picture_ptr->mb_type[mb_pos];
479 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
480 r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
482 r->cbp_chroma[mb_pos] = 0xFF;
484 mb_pos = row * s->mb_stride;
485 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
486 int y_h_deblock, y_v_deblock;
487 int c_v_deblock[2], c_h_deblock[2];
490 int y_to_deblock, c_to_deblock[2];
492 q = s->current_picture_ptr->qscale_table[mb_pos];
493 alpha = rv40_alpha_tab[q];
494 beta = rv40_beta_tab [q];
495 betaY = betaC = beta * 3;
496 if(s->width * s->height <= 176*144)
502 avail[3] = row < s->mb_height - 1;
503 for(i = 0; i < 4; i++){
505 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
506 mvmasks[i] = r->deblock_coefs[pos];
507 mbtype [i] = s->current_picture_ptr->mb_type[pos];
508 cbp [i] = r->cbp_luma[pos];
509 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
510 uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
513 mbtype [i] = mbtype[0];
515 uvcbp[i][0] = uvcbp[i][1] = 0;
517 mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
518 clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
520 y_to_deblock = mvmasks[POS_CUR]
521 | (mvmasks[POS_BOTTOM] << 16);
522 /* This pattern contains bits signalling that horizontal edges of
523 * the current block can be filtered.
524 * That happens when either of adjacent subblocks is coded or lies on
525 * the edge of 8x8 blocks with motion vectors differing by more than
526 * 3/4 pel in any component (any edge orientation for some reason).
528 y_h_deblock = y_to_deblock
529 | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW)
530 | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12);
531 /* This pattern contains bits signalling that vertical edges of
532 * the current block can be filtered.
533 * That happens when either of adjacent subblocks is coded or lies on
534 * the edge of 8x8 blocks with motion vectors differing by more than
535 * 3/4 pel in any component (any edge orientation for some reason).
537 y_v_deblock = y_to_deblock
538 | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL)
539 | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
541 y_v_deblock &= ~MASK_Y_LEFT_COL;
543 y_h_deblock &= ~MASK_Y_TOP_ROW;
544 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] || mb_strong[POS_BOTTOM]))
545 y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
546 /* Calculating chroma patterns is similar and easier since there is
547 * no motion vector pattern for them.
549 for(i = 0; i < 2; i++){
550 c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
551 c_v_deblock[i] = c_to_deblock[i]
552 | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL)
553 | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1);
554 c_h_deblock[i] = c_to_deblock[i]
555 | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2)
556 | (uvcbp[POS_CUR][i] << 2);
558 c_v_deblock[i] &= ~MASK_C_LEFT_COL;
560 c_h_deblock[i] &= ~MASK_C_TOP_ROW;
561 if(row == s->mb_height - 1 || mb_strong[POS_CUR] || mb_strong[POS_BOTTOM])
562 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
565 for(j = 0; j < 16; j += 4){
566 Y = s->current_picture_ptr->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
567 for(i = 0; i < 4; i++, Y += 4){
569 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
570 int dither = j ? ij : i*4;
572 // if bottom block is coded then we can filter its top edge
573 // (or bottom edge of this block, which is the same)
574 if(y_h_deblock & (MASK_BOTTOM << ij)){
575 rv40_h_loop_filter(Y+4*s->linesize, s->linesize, dither,
576 y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
578 alpha, beta, betaY, 0, 0);
580 // filter left block edge in ordinary mode (with low filtering strength)
581 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){
583 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
585 clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
586 rv40_v_loop_filter(Y, s->linesize, dither,
589 alpha, beta, betaY, 0, 0);
591 // filter top edge of the current macroblock when filtering strength is high
592 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){
593 rv40_h_loop_filter(Y, s->linesize, dither,
595 mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
596 alpha, beta, betaY, 0, 1);
598 // filter left block edge in edge mode (with high filtering strength)
599 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){
600 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
601 rv40_v_loop_filter(Y, s->linesize, dither,
604 alpha, beta, betaY, 0, 1);
608 for(k = 0; k < 2; k++){
609 for(j = 0; j < 2; j++){
610 C = s->current_picture_ptr->data[k+1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
611 for(i = 0; i < 2; i++, C += 4){
613 int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
614 if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
615 int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
616 rv40_h_loop_filter(C+4*s->uvlinesize, s->uvlinesize, i*8,
619 alpha, beta, betaC, 1, 0);
621 if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){
623 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
625 clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
626 rv40_v_loop_filter(C, s->uvlinesize, j*8,
629 alpha, beta, betaC, 1, 0);
631 if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){
632 int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
633 rv40_h_loop_filter(C, s->uvlinesize, i*8,
636 alpha, beta, betaC, 1, 1);
638 if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){
639 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
640 rv40_v_loop_filter(C, s->uvlinesize, j*8,
643 alpha, beta, betaC, 1, 1);
652 * Initialize decoder.
654 static av_cold int rv40_decode_init(AVCodecContext *avctx)
656 RV34DecContext *r = avctx->priv_data;
659 ff_rv34_decode_init(avctx);
660 if(!aic_top_vlc.bits)
662 r->parse_slice_header = rv40_parse_slice_header;
663 r->decode_intra_types = rv40_decode_intra_types;
664 r->decode_mb_info = rv40_decode_mb_info;
665 r->loop_filter = rv40_loop_filter;
666 r->luma_dc_quant_i = rv40_luma_dc_quant[0];
667 r->luma_dc_quant_p = rv40_luma_dc_quant[1];
671 AVCodec ff_rv40_decoder = {
675 sizeof(RV34DecContext),
679 ff_rv34_decode_frame,
680 CODEC_CAP_DR1 | CODEC_CAP_DELAY,
681 .flush = ff_mpeg_flush,
682 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"),
683 .pix_fmts= ff_pixfmt_list_420,