FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/rv40.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 260 275 94.5%
Functions: 10 10 100.0%
Branches: 196 211 92.9%
Line Branch Exec Source
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 "config.h"
28
29 #include "libavutil/imgutils.h"
30 #include "libavutil/thread.h"
31
32 #include "avcodec.h"
33 #include "codec_internal.h"
34 #include "mpegutils.h"
35 #include "mpegvideo.h"
36 #include "mpegvideodec.h"
37 #include "golomb.h"
38
39 #include "rv34.h"
40 #include "rv40vlc2.h"
41 #include "rv40data.h"
42
43 static VLCElem aic_top_vlc[23590];
44 static const VLCElem *aic_mode1_vlc[AIC_MODE1_NUM], *aic_mode2_vlc[AIC_MODE2_NUM];
45 static const VLCElem *ptype_vlc[NUM_PTYPE_VLCS], *btype_vlc[NUM_BTYPE_VLCS];
46
47 190 static av_cold const VLCElem *rv40_init_table(VLCInitState *state, int nb_bits,
48 int nb_codes, const uint8_t (*tab)[2])
49 {
50 380 return ff_vlc_init_tables_from_lengths(state, nb_bits, nb_codes,
51 190 &tab[0][1], 2, &tab[0][0], 2, 1,
52 0, 0);
53 }
54
55 /**
56 * Initialize all tables.
57 */
58 2 static av_cold void rv40_init_tables(void)
59 {
60 2 VLCInitState state = VLC_INIT_STATE(aic_top_vlc);
61 int i;
62
63 2 rv40_init_table(&state, AIC_TOP_BITS, AIC_TOP_SIZE,
64 rv40_aic_top_vlc_tab);
65
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 182 for(i = 0; i < AIC_MODE1_NUM; i++){
66 // Every tenth VLC table is empty
67
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 180 if((i % 10) == 9) continue;
68 162 aic_mode1_vlc[i] =
69 162 rv40_init_table(&state, AIC_MODE1_BITS,
70 162 AIC_MODE1_SIZE, aic_mode1_vlc_tabs[i]);
71 }
72
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 42 for (unsigned i = 0; i < AIC_MODE2_NUM; i++){
73 uint16_t syms[AIC_MODE2_SIZE];
74
75
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 3280 for (int j = 0; j < AIC_MODE2_SIZE; j++) {
76 3240 int first = aic_mode2_vlc_syms[i][j] >> 4;
77 3240 int second = aic_mode2_vlc_syms[i][j] & 0xF;
78 if (HAVE_BIGENDIAN)
79 syms[j] = (first << 8) | second;
80 else
81 3240 syms[j] = first | (second << 8);
82 }
83 40 aic_mode2_vlc[i] =
84 40 ff_vlc_init_tables_from_lengths(&state, AIC_MODE2_BITS, AIC_MODE2_SIZE,
85 40 aic_mode2_vlc_bits[i], 1,
86 syms, 2, 2, 0, 0);
87 }
88
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 16 for(i = 0; i < NUM_PTYPE_VLCS; i++){
89 14 ptype_vlc[i] =
90 14 rv40_init_table(&state, PTYPE_VLC_BITS, PTYPE_VLC_SIZE,
91 14 ptype_vlc_tabs[i]);
92 }
93
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 14 for(i = 0; i < NUM_BTYPE_VLCS; i++){
94 12 btype_vlc[i] =
95 12 rv40_init_table(&state, BTYPE_VLC_BITS, BTYPE_VLC_SIZE,
96 12 btype_vlc_tabs[i]);
97 }
98 2 }
99
100 /**
101 * Get stored dimension from bitstream.
102 *
103 * If the width/height is the standard one then it's coded as a 3-bit index.
104 * Otherwise it is coded as escaped 8-bit portions.
105 */
106 112 static int get_dimension(GetBitContext *gb, const int *dim)
107 {
108 112 int t = get_bits(gb, 3);
109 112 int val = dim[t];
110
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 112 if(val < 0)
111 56 val = dim[get_bits1(gb) - val];
112
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 112 if(!val){
113 do{
114
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 112 if (get_bits_left(gb) < 8)
115 ✗ return AVERROR_INVALIDDATA;
116 112 t = get_bits(gb, 8);
117 112 val += t << 2;
118
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 112 }while(t == 0xFF);
119 }
120 112 return val;
121 }
122
123 /**
124 * Get encoded picture size - usually this is called from rv40_parse_slice_header.
125 */
126 56 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h)
127 {
128 56 *w = get_dimension(gb, rv40_standard_widths);
129 56 *h = get_dimension(gb, rv40_standard_heights);
130 56 }
131
132 2076 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
133 {
134 int mb_bits;
135 2076 int w = r->s.width, h = r->s.height;
136 int mb_size;
137 int ret;
138
139 2076 memset(si, 0, sizeof(SliceInfo));
140
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 2076 if(get_bits1(gb))
141 ✗ return AVERROR_INVALIDDATA;
142 2076 si->type = get_bits(gb, 2);
143
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 2076 if(si->type == 1) si->type = 0;
144 2076 si->quant = get_bits(gb, 5);
145
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 2076 if(get_bits(gb, 2))
146 ✗ return AVERROR_INVALIDDATA;
147 2076 si->vlc_set = get_bits(gb, 2);
148 2076 skip_bits1(gb);
149 2076 si->pts = get_bits(gb, 13);
150
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 2076 if(!si->type || !get_bits1(gb))
151 56 rv40_parse_picture_size(gb, &w, &h);
152
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 2076 if ((ret = av_image_check_size(w, h, 0, r->s.avctx)) < 0)
153 ✗ return ret;
154 2076 si->width = w;
155 2076 si->height = h;
156 2076 mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
157 2076 mb_bits = ff_rv34_get_start_offset(gb, mb_size);
158 2076 si->start = get_bits(gb, mb_bits);
159
160 2076 return 0;
161 }
162
163 /**
164 * Decode 4x4 intra types array.
165 */
166 12390 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
167 {
168 12390 MpegEncContext *s = &r->s;
169 int i, j, k, v;
170 int A, B, C;
171 int pattern;
172 int8_t *ptr;
173
174
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 61950 for(i = 0; i < 4; i++, dst += r->intra_types_stride){
175
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 49560 if(!i && s->first_slice_line){
176 4859 pattern = get_vlc2(gb, aic_top_vlc, AIC_TOP_BITS, 1);
177 4859 dst[0] = (pattern >> 2) & 2;
178 4859 dst[1] = (pattern >> 1) & 2;
179 4859 dst[2] = pattern & 2;
180 4859 dst[3] = (pattern << 1) & 2;
181 4859 continue;
182 }
183 44701 ptr = dst;
184
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 190876 for(j = 0; j < 4; j++){
185 /* Coefficients are read using VLC chosen by the prediction pattern
186 * The first one (used for retrieving a pair of coefficients) is
187 * constructed from the top, top right and left coefficients
188 * The second one (used for retrieving only one coefficient) is
189 * top + 10 * left.
190 */
191 146175 A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row
192 146175 B = ptr[-r->intra_types_stride];
193 146175 C = ptr[-1];
194 146175 pattern = A + B * (1 << 4) + C * (1 << 8);
195
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 2594727 for(k = 0; k < MODE2_PATTERNS_NUM; k++)
196
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 2482111 if(pattern == rv40_aic_table_index[k])
197 33559 break;
198
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 146175 if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients
199 32629 AV_WN16(ptr, get_vlc2(gb, aic_mode2_vlc[k], AIC_MODE2_BITS, 2));
200 32629 ptr += 2;
201 32629 j++;
202 }else{
203
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 113546 if(B != -1 && C != -1)
204 111248 v = get_vlc2(gb, aic_mode1_vlc[B + C*10], AIC_MODE1_BITS, 1);
205 else{ // tricky decoding
206 2298 v = 0;
207
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 2298 switch(C){
208 2298 case -1: // code 0 -> 1, 1 -> 0
209
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 2298 if(B < 2)
210 2298 v = get_bits1(gb) ^ 1;
211 2298 break;
212 ✗ case 0:
213 case 2: // code 0 -> 2, 1 -> 0
214 ✗ v = (get_bits1(gb) ^ 1) << 1;
215 ✗ break;
216 }
217 }
218 113546 *ptr++ = v;
219 }
220 }
221 }
222 12390 return 0;
223 }
224
225 /**
226 * Decode macroblock information.
227 */
228 217440 static int rv40_decode_mb_info(RV34DecContext *r)
229 {
230 217440 MpegEncContext *s = &r->s;
231 217440 GetBitContext *gb = &s->gb;
232 int q, i;
233 217440 int prev_type = 0;
234 217440 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
235
236
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 217440 if(!r->s.mb_skip_run) {
237 80656 r->s.mb_skip_run = get_interleaved_ue_golomb(gb) + 1;
238
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 80656 if(r->s.mb_skip_run > (unsigned)s->mb_num)
239 ✗ return -1;
240 }
241
242
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 217440 if(--r->s.mb_skip_run)
243 137293 return RV34_MB_SKIP;
244
245
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 80147 if(r->avail_cache[6-4]){
246 61051 int blocks[RV34_MB_TYPES] = {0};
247 61051 int count = 0;
248
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 61051 if(r->avail_cache[6-1])
249 59166 blocks[r->mb_type[mb_pos - 1]]++;
250 61051 blocks[r->mb_type[mb_pos - s->mb_stride]]++;
251
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 61051 if(r->avail_cache[6-2])
252 59917 blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++;
253
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 61051 if(r->avail_cache[6-5])
254 58857 blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++;
255
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 362897 for(i = 0; i < RV34_MB_TYPES; i++){
256
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 359819 if(blocks[i] > count){
257 80843 count = blocks[i];
258 80843 prev_type = i;
259
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 80843 if(count>1)
260 57973 break;
261 }
262 }
263
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 19096 } else if (r->avail_cache[6-1])
264 18159 prev_type = r->mb_type[mb_pos - 1];
265
266
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 80147 if(s->pict_type == AV_PICTURE_TYPE_P){
267 26103 prev_type = block_num_to_ptype_vlc_num[prev_type];
268 26103 q = get_vlc2(gb, ptype_vlc[prev_type], PTYPE_VLC_BITS, 1);
269
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 26103 if(q < PBTYPE_ESCAPE)
270 26103 return q;
271 ✗ q = get_vlc2(gb, ptype_vlc[prev_type], PTYPE_VLC_BITS, 1);
272 ✗ av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n");
273 }else{
274 54044 prev_type = block_num_to_btype_vlc_num[prev_type];
275 54044 q = get_vlc2(gb, btype_vlc[prev_type], BTYPE_VLC_BITS, 1);
276
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 54044 if(q < PBTYPE_ESCAPE)
277 54044 return q;
278 ✗ q = get_vlc2(gb, btype_vlc[prev_type], BTYPE_VLC_BITS, 1);
279 ✗ av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n");
280 }
281 ✗ return 0;
282 }
283
284 enum RV40BlockPos{
285 POS_CUR,
286 POS_TOP,
287 POS_LEFT,
288 POS_BOTTOM,
289 };
290
291 #define MASK_CUR 0x0001
292 #define MASK_RIGHT 0x0008
293 #define MASK_BOTTOM 0x0010
294 #define MASK_TOP 0x1000
295 #define MASK_Y_TOP_ROW 0x000F
296 #define MASK_Y_LAST_ROW 0xF000
297 #define MASK_Y_LEFT_COL 0x1111
298 #define MASK_Y_RIGHT_COL 0x8888
299 #define MASK_C_TOP_ROW 0x0003
300 #define MASK_C_LAST_ROW 0x000C
301 #define MASK_C_LEFT_COL 0x0005
302 #define MASK_C_RIGHT_COL 0x000A
303
304 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 };
305 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 };
306
307 2330845 static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp,
308 uint8_t *src, int stride, int dmode,
309 int lim_q1, int lim_p1,
310 int alpha, int beta, int beta2,
311 int chroma, int edge, int dir)
312 {
313 int filter_p1, filter_q1;
314 int strong;
315 int lims;
316
317 2330845 strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2,
318 edge, &filter_p1, &filter_q1);
319
320 2330845 lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1;
321
322
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 2330845 if (strong) {
323 329538 rdsp->rv40_strong_loop_filter[dir](src, stride, alpha,
324 lims, dmode, chroma);
325
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 2001307 } else if (filter_p1 & filter_q1) {
326 1251915 rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta,
327 lims, lim_q1, lim_p1);
328
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 749392 } else if (filter_p1 | filter_q1) {
329 241791 rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1,
330 alpha, beta, lims >> 1, lim_q1 >> 1,
331 lim_p1 >> 1);
332 }
333 2330845 }
334
335 /**
336 * RV40 loop filtering function
337 */
338 6140 static void rv40_loop_filter(RV34DecContext *r, int row)
339 {
340 6140 MpegEncContext *s = &r->s;
341 int mb_pos, mb_x;
342 int i, j, k;
343 uint8_t *Y, *C;
344 int alpha, beta, betaY, betaC;
345 int q;
346 int mbtype[4]; ///< current macroblock and its neighbours types
347 /**
348 * flags indicating that macroblock can be filtered with strong filter
349 * it is set only for intra coded MB and MB with DCs coded separately
350 */
351 int mb_strong[4];
352 int clip[4]; ///< MB filter clipping value calculated from filtering strength
353 /**
354 * coded block patterns for luma part of current macroblock and its neighbours
355 * Format:
356 * LSB corresponds to the top left block,
357 * each nibble represents one row of subblocks.
358 */
359 int cbp[4];
360 /**
361 * coded block patterns for chroma part of current macroblock and its neighbours
362 * Format is the same as for luma with two subblocks in a row.
363 */
364 int uvcbp[4][2];
365 /**
366 * This mask represents the pattern of luma subblocks that should be filtered
367 * in addition to the coded ones because they lie at the edge of
368 * 8x8 block with different enough motion vectors
369 */
370 unsigned mvmasks[4];
371
372 6140 mb_pos = row * s->mb_stride;
373
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 227180 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
374 221040 int mbtype = s->cur_pic.mb_type[mb_pos];
375
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 221040 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
376 23450 r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF;
377
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 221040 if(IS_INTRA(mbtype))
378 22901 r->cbp_chroma[mb_pos] = 0xFF;
379 }
380 6140 mb_pos = row * s->mb_stride;
381
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 227180 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
382 int y_h_deblock, y_v_deblock;
383 int c_v_deblock[2], c_h_deblock[2];
384 int clip_left;
385 int avail[4];
386 unsigned y_to_deblock;
387 int c_to_deblock[2];
388
389 221040 q = s->cur_pic.qscale_table[mb_pos];
390 221040 alpha = rv40_alpha_tab[q];
391 221040 beta = rv40_beta_tab [q];
392 221040 betaY = betaC = beta * 3;
393
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 221040 if(s->width * s->height <= 176*144)
394 ✗ betaY += beta;
395
396 221040 avail[0] = 1;
397 221040 avail[1] = row;
398 221040 avail[2] = mb_x;
399 221040 avail[3] = row < s->mb_height - 1;
400
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 1105200 for(i = 0; i < 4; i++){
401
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 884160 if(avail[i]){
402 855916 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride;
403 855916 mvmasks[i] = r->deblock_coefs[pos];
404 855916 mbtype [i] = s->cur_pic.mb_type[pos];
405 855916 cbp [i] = r->cbp_luma[pos];
406 855916 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF;
407 855916 uvcbp[i][1] = r->cbp_chroma[pos] >> 4;
408 }else{
409 28244 mvmasks[i] = 0;
410 28244 mbtype [i] = mbtype[0];
411 28244 cbp [i] = 0;
412 28244 uvcbp[i][0] = uvcbp[i][1] = 0;
413 }
414
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 884160 mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]);
415 884160 clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q];
416 }
417 221040 y_to_deblock = mvmasks[POS_CUR]
418 221040 | (mvmasks[POS_BOTTOM] << 16);
419 /* This pattern contains bits signalling that horizontal edges of
420 * the current block can be filtered.
421 * That happens when either of adjacent subblocks is coded or lies on
422 * the edge of 8x8 blocks with motion vectors differing by more than
423 * 3/4 pel in any component (any edge orientation for some reason).
424 */
425 221040 y_h_deblock = y_to_deblock
426 221040 | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW)
427 221040 | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12);
428 /* This pattern contains bits signalling that vertical edges of
429 * the current block can be filtered.
430 * That happens when either of adjacent subblocks is coded or lies on
431 * the edge of 8x8 blocks with motion vectors differing by more than
432 * 3/4 pel in any component (any edge orientation for some reason).
433 */
434 221040 y_v_deblock = y_to_deblock
435 221040 | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL)
436 221040 | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3);
437
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 221040 if(!mb_x)
438 6140 y_v_deblock &= ~MASK_Y_LEFT_COL;
439
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 221040 if(!row)
440 11052 y_h_deblock &= ~MASK_Y_TOP_ROW;
441
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 221040 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
442 44284 y_h_deblock &= ~(MASK_Y_TOP_ROW << 16);
443 /* Calculating chroma patterns is similar and easier since there is
444 * no motion vector pattern for them.
445 */
446
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 663120 for(i = 0; i < 2; i++){
447 442080 c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i];
448 442080 c_v_deblock[i] = c_to_deblock[i]
449 442080 | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL)
450 442080 | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1);
451 442080 c_h_deblock[i] = c_to_deblock[i]
452 442080 | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2)
453 442080 | (uvcbp[POS_CUR][i] << 2);
454
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 442080 if(!mb_x)
455 12280 c_v_deblock[i] &= ~MASK_C_LEFT_COL;
456
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 442080 if(!row)
457 22104 c_h_deblock[i] &= ~MASK_C_TOP_ROW;
458
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 442080 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM]))
459 88568 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4);
460 }
461
462
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 1105200 for(j = 0; j < 16; j += 4){
463 884160 Y = s->cur_pic.data[0] + mb_x*16 + (row*16 + j) * s->linesize;
464
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 4420800 for(i = 0; i < 4; i++, Y += 4){
465 3536640 int ij = i + j;
466
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 3536640 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
467
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 3536640 int dither = j ? ij : i*4;
468
469 // if bottom block is coded then we can filter its top edge
470 // (or bottom edge of this block, which is the same)
471
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 3536640 if(y_h_deblock & (MASK_BOTTOM << ij)){
472 711124 rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize,
473 711124 s->linesize, dither,
474
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 711124 y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0,
475 clip_cur, alpha, beta, betaY,
476 0, 0, 0);
477 }
478 // filter left block edge in ordinary mode (with low filtering strength)
479
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 3536640 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
480
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 708746 if(!i)
481
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 141800 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
482 else
483
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 566946 clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
484 708746 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
485 clip_cur,
486 clip_left,
487 alpha, beta, betaY, 0, 0, 1);
488 }
489 // filter top edge of the current macroblock when filtering strength is high
490
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 3536640 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
491 132928 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
492 clip_cur,
493
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 132928 mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0,
494 alpha, beta, betaY, 0, 1, 0);
495 }
496 // filter left block edge in edge mode (with high filtering strength)
497
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 3536640 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
498
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 121952 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0;
499 121952 rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither,
500 clip_cur,
501 clip_left,
502 alpha, beta, betaY, 0, 1, 1);
503 }
504 }
505 }
506
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 663120 for(k = 0; k < 2; k++){
507
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 1326240 for(j = 0; j < 2; j++){
508 884160 C = s->cur_pic.data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize;
509
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 2652480 for(i = 0; i < 2; i++, C += 4){
510 1768320 int ij = i + j*2;
511
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 1768320 int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0;
512
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 1768320 if(c_h_deblock[k] & (MASK_CUR << (ij+2))){
513
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 203686 int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0;
514 203686 rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8,
515 clip_bot,
516 clip_cur,
517 alpha, beta, betaC, 1, 0, 0);
518 }
519
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 1768320 if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){
520
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 201563 if(!i)
521
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 48990 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
522 else
523
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 152573 clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0;
524 201563 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
525 clip_cur,
526 clip_left,
527 alpha, beta, betaC, 1, 0, 1);
528 }
529
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 1768320 if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){
530
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 130789 int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0;
531 130789 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8,
532 clip_cur,
533 clip_top,
534 alpha, beta, betaC, 1, 1, 0);
535 }
536
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 1768320 if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){
537
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 120057 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0;
538 120057 rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8,
539 clip_cur,
540 clip_left,
541 alpha, beta, betaC, 1, 1, 1);
542 }
543 }
544 }
545 }
546 }
547 6140 }
548
549 /**
550 * Initialize decoder.
551 */
552 4 static av_cold int rv40_decode_init(AVCodecContext *avctx)
553 {
554 static AVOnce init_static_once = AV_ONCE_INIT;
555 4 RV34DecContext *r = avctx->priv_data;
556 int ret;
557
558 4 r->rv30 = 0;
559
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 4 if ((ret = ff_rv34_decode_init(avctx)) < 0)
560 ✗ return ret;
561 4 r->parse_slice_header = rv40_parse_slice_header;
562 4 r->decode_intra_types = rv40_decode_intra_types;
563 4 r->decode_mb_info = rv40_decode_mb_info;
564 4 r->loop_filter = rv40_loop_filter;
565 4 r->luma_dc_quant_i = rv40_luma_dc_quant[0];
566 4 r->luma_dc_quant_p = rv40_luma_dc_quant[1];
567 4 ff_rv40dsp_init(&r->rdsp);
568 4 ff_thread_once(&init_static_once, rv40_init_tables);
569 4 return 0;
570 }
571
572 const FFCodec ff_rv40_decoder = {
573 .p.name = "rv40",
574 CODEC_LONG_NAME("RealVideo 4.0"),
575 .p.type = AVMEDIA_TYPE_VIDEO,
576 .p.id = AV_CODEC_ID_RV40,
577 .priv_data_size = sizeof(RV34DecContext),
578 .init = rv40_decode_init,
579 .close = ff_rv34_decode_end,
580 FF_CODEC_DECODE_CB(ff_rv34_decode_frame),
581 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
582 AV_CODEC_CAP_FRAME_THREADS,
583 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
584 .flush = ff_mpeg_flush,
585 UPDATE_THREAD_CONTEXT(ff_rv34_decode_update_thread_context),
586 };
587