Libav
rv34.c
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1 /*
2  * RV30/40 decoder common data
3  * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #include "libavutil/internal.h"
28 
29 #include "avcodec.h"
30 #include "error_resilience.h"
31 #include "mpegvideo.h"
32 #include "golomb.h"
33 #include "internal.h"
34 #include "mathops.h"
35 #include "rectangle.h"
36 #include "thread.h"
37 
38 #include "rv34vlc.h"
39 #include "rv34data.h"
40 #include "rv34.h"
41 
42 static inline void ZERO8x2(void* dst, int stride)
43 {
44  fill_rectangle(dst, 1, 2, stride, 0, 4);
45  fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
46 }
47 
49 static const int rv34_mb_type_to_lavc[12] = {
62 };
63 
64 
66 
67 static int rv34_decode_mv(RV34DecContext *r, int block_type);
68 
74 static const int table_offs[] = {
75  0, 1818, 3622, 4144, 4698, 5234, 5804, 5868, 5900, 5932,
76  5996, 6252, 6316, 6348, 6380, 7674, 8944, 10274, 11668, 12250,
77  14060, 15846, 16372, 16962, 17512, 18148, 18180, 18212, 18244, 18308,
78  18564, 18628, 18660, 18692, 20036, 21314, 22648, 23968, 24614, 26384,
79  28190, 28736, 29366, 29938, 30608, 30640, 30672, 30704, 30768, 31024,
80  31088, 31120, 31184, 32570, 33898, 35236, 36644, 37286, 39020, 40802,
81  41368, 42052, 42692, 43348, 43380, 43412, 43444, 43476, 43604, 43668,
82  43700, 43732, 45100, 46430, 47778, 49160, 49802, 51550, 53340, 53972,
83  54648, 55348, 55994, 56122, 56154, 56186, 56218, 56346, 56410, 56442,
84  56474, 57878, 59290, 60636, 62036, 62682, 64460, 64524, 64588, 64716,
85  64844, 66076, 67466, 67978, 68542, 69064, 69648, 70296, 72010, 72074,
86  72138, 72202, 72330, 73572, 74936, 75454, 76030, 76566, 77176, 77822,
87  79582, 79646, 79678, 79742, 79870, 81180, 82536, 83064, 83672, 84242,
88  84934, 85576, 87384, 87448, 87480, 87544, 87672, 88982, 90340, 90902,
89  91598, 92182, 92846, 93488, 95246, 95278, 95310, 95374, 95502, 96878,
90  98266, 98848, 99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416,
91  103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398,
92  111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592
93 };
94 
95 static VLC_TYPE table_data[117592][2];
96 
105 static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms,
106  const int num)
107 {
108  int i;
109  int counts[17] = {0}, codes[17];
110  uint16_t cw[MAX_VLC_SIZE], syms[MAX_VLC_SIZE];
112  int maxbits = 0, realsize = 0;
113 
114  for(i = 0; i < size; i++){
115  if(bits[i]){
116  bits2[realsize] = bits[i];
117  syms[realsize] = insyms ? insyms[i] : i;
118  realsize++;
119  maxbits = FFMAX(maxbits, bits[i]);
120  counts[bits[i]]++;
121  }
122  }
123 
124  codes[0] = 0;
125  for(i = 0; i < 16; i++)
126  codes[i+1] = (codes[i] + counts[i]) << 1;
127  for(i = 0; i < realsize; i++)
128  cw[i] = codes[bits2[i]]++;
129 
130  vlc->table = &table_data[table_offs[num]];
131  vlc->table_allocated = table_offs[num + 1] - table_offs[num];
132  ff_init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize,
133  bits2, 1, 1,
134  cw, 2, 2,
135  syms, 2, 2, INIT_VLC_USE_NEW_STATIC);
136 }
137 
141 static av_cold void rv34_init_tables(void)
142 {
143  int i, j, k;
144 
145  for(i = 0; i < NUM_INTRA_TABLES; i++){
146  for(j = 0; j < 2; j++){
147  rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE, &intra_vlcs[i].cbppattern[j], NULL, 19*i + 0 + j);
148  rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL, 19*i + 2 + j);
149  rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL, 19*i + 4 + j);
150  for(k = 0; k < 4; k++){
151  rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2], CBP_VLC_SIZE, &intra_vlcs[i].cbp[j][k], rv34_cbp_code, 19*i + 6 + j*4 + k);
152  }
153  }
154  for(j = 0; j < 4; j++){
155  rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL, 19*i + 14 + j);
156  }
157  rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18);
158  }
159 
160  for(i = 0; i < NUM_INTER_TABLES; i++){
161  rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL, i*12 + 95);
162  for(j = 0; j < 4; j++){
163  rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code, i*12 + 96 + j);
164  }
165  for(j = 0; j < 2; j++){
166  rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j], NULL, i*12 + 100 + j);
167  rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL, i*12 + 102 + j);
168  rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL, i*12 + 104 + j);
169  }
170  rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106);
171  }
172 }
173  // vlc group
175 
184 static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
185 {
186  int pattern, code, cbp=0;
187  int ones;
188  static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
189  static const int shifts[4] = { 0, 2, 8, 10 };
190  const int *curshift = shifts;
191  int i, t, mask;
192 
193  code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
194  pattern = code & 0xF;
195  code >>= 4;
196 
197  ones = rv34_count_ones[pattern];
198 
199  for(mask = 8; mask; mask >>= 1, curshift++){
200  if(pattern & mask)
201  cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
202  }
203 
204  for(i = 0; i < 4; i++){
205  t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
206  if(t == 1)
207  cbp |= cbp_masks[get_bits1(gb)] << i;
208  if(t == 2)
209  cbp |= cbp_masks[2] << i;
210  }
211  return cbp;
212 }
213 
217 static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
218 {
219  if(coef){
220  if(coef == esc){
221  coef = get_vlc2(gb, vlc->table, 9, 2);
222  if(coef > 23){
223  coef -= 23;
224  coef = 22 + ((1 << coef) | get_bits(gb, coef));
225  }
226  coef += esc;
227  }
228  if(get_bits1(gb))
229  coef = -coef;
230  *dst = (coef*q + 8) >> 4;
231  }
232 }
233 
237 static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
238 {
239  int flags = modulo_three_table[code];
240 
241  decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
242  if(is_block2){
243  decode_coeff(dst+1*4+0, (flags >> 4) & 3, 2, gb, vlc, q);
244  decode_coeff(dst+0*4+1, (flags >> 2) & 3, 2, gb, vlc, q);
245  }else{
246  decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q);
247  decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q);
248  }
249  decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
250 }
251 
255 static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
256 {
257  int coeff = modulo_three_table[code] >> 6;
258  decode_coeff(dst, coeff, 3, gb, vlc, q);
259 }
260 
261 static inline void decode_subblock3(int16_t *dst, int code, GetBitContext *gb, VLC *vlc,
262  int q_dc, int q_ac1, int q_ac2)
263 {
264  int flags = modulo_three_table[code];
265 
266  decode_coeff(dst+0*4+0, (flags >> 6) , 3, gb, vlc, q_dc);
267  decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
268  decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
269  decode_coeff(dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
270 }
271 
283 static int rv34_decode_block(int16_t *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
284 {
285  int code, pattern, has_ac = 1;
286 
287  code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
288 
289  pattern = code & 0x7;
290 
291  code >>= 3;
292 
293  if (modulo_three_table[code] & 0x3F) {
294  decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
295  } else {
296  decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
297  if (!pattern)
298  return 0;
299  has_ac = 0;
300  }
301 
302  if(pattern & 4){
303  code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
304  decode_subblock(dst + 4*0+2, code, 0, gb, &rvlc->coefficient, q_ac2);
305  }
306  if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
307  code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
308  decode_subblock(dst + 4*2+0, code, 1, gb, &rvlc->coefficient, q_ac2);
309  }
310  if(pattern & 1){
311  code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
312  decode_subblock(dst + 4*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
313  }
314  return has_ac | pattern;
315 }
316 
327 {
328  int i;
329  for(i = 0; i < 5; i++)
330  if(rv34_mb_max_sizes[i] >= mb_size - 1)
331  break;
332  return rv34_mb_bits_sizes[i];
333 }
334 
338 static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
339 {
340  if(mod == 2 && quant < 19) quant += 10;
341  else if(mod && quant < 26) quant += 5;
342  return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]]
343  : &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]];
344 }
345 
349 static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
350 {
351  MpegEncContext *s = &r->s;
352  GetBitContext *gb = &s->gb;
353  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
354  int t;
355 
356  r->is16 = get_bits1(gb);
357  if(r->is16){
360  t = get_bits(gb, 2);
361  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
362  r->luma_vlc = 2;
363  }else{
364  if(!r->rv30){
365  if(!get_bits1(gb))
366  av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
367  }
370  if(r->decode_intra_types(r, gb, intra_types) < 0)
371  return -1;
372  r->luma_vlc = 1;
373  }
374 
375  r->chroma_vlc = 0;
376  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
377 
378  return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
379 }
380 
384 static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
385 {
386  MpegEncContext *s = &r->s;
387  GetBitContext *gb = &s->gb;
388  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
389  int i, t;
390 
391  r->block_type = r->decode_mb_info(r);
392  if(r->block_type == -1)
393  return -1;
395  r->mb_type[mb_pos] = r->block_type;
396  if(r->block_type == RV34_MB_SKIP){
397  if(s->pict_type == AV_PICTURE_TYPE_P)
398  r->mb_type[mb_pos] = RV34_MB_P_16x16;
399  if(s->pict_type == AV_PICTURE_TYPE_B)
400  r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
401  }
402  r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
403  rv34_decode_mv(r, r->block_type);
404  if(r->block_type == RV34_MB_SKIP){
405  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0]));
406  return 0;
407  }
408  r->chroma_vlc = 1;
409  r->luma_vlc = 0;
410 
411  if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
412  if(r->is16){
413  t = get_bits(gb, 2);
414  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
415  r->luma_vlc = 2;
416  }else{
417  if(r->decode_intra_types(r, gb, intra_types) < 0)
418  return -1;
419  r->luma_vlc = 1;
420  }
421  r->chroma_vlc = 0;
422  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
423  }else{
424  for(i = 0; i < 16; i++)
425  intra_types[(i & 3) + (i>>2) * r->intra_types_stride] = 0;
426  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
427  if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){
428  r->is16 = 1;
429  r->chroma_vlc = 1;
430  r->luma_vlc = 2;
431  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
432  }
433  }
434 
435  return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
436 }
437  //bitstream functions
439 
446 static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
447 
449 static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
450 
452 static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
453 
461 static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
462 {
463  MpegEncContext *s = &r->s;
464  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
465  int A[2] = {0}, B[2], C[2];
466  int i, j;
467  int mx, my;
468  int* avail = r->avail_cache + avail_indexes[subblock_no];
469  int c_off = part_sizes_w[block_type];
470 
471  mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
472  if(subblock_no == 3)
473  c_off = -1;
474 
475  if(avail[-1]){
476  A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
477  A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
478  }
479  if(avail[-4]){
480  B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
481  B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
482  }else{
483  B[0] = A[0];
484  B[1] = A[1];
485  }
486  if(!avail[c_off-4]){
487  if(avail[-4] && (avail[-1] || r->rv30)){
488  C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
489  C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
490  }else{
491  C[0] = A[0];
492  C[1] = A[1];
493  }
494  }else{
495  C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
496  C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
497  }
498  mx = mid_pred(A[0], B[0], C[0]);
499  my = mid_pred(A[1], B[1], C[1]);
500  mx += r->dmv[dmv_no][0];
501  my += r->dmv[dmv_no][1];
502  for(j = 0; j < part_sizes_h[block_type]; j++){
503  for(i = 0; i < part_sizes_w[block_type]; i++){
504  s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
505  s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
506  }
507  }
508 }
509 
510 #define GET_PTS_DIFF(a, b) ((a - b + 8192) & 0x1FFF)
511 
515 static int calc_add_mv(RV34DecContext *r, int dir, int val)
516 {
517  int mul = dir ? -r->mv_weight2 : r->mv_weight1;
518 
519  return (val * mul + 0x2000) >> 14;
520 }
521 
525 static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2],
526  int A_avail, int B_avail, int C_avail,
527  int *mx, int *my)
528 {
529  if(A_avail + B_avail + C_avail != 3){
530  *mx = A[0] + B[0] + C[0];
531  *my = A[1] + B[1] + C[1];
532  if(A_avail + B_avail + C_avail == 2){
533  *mx /= 2;
534  *my /= 2;
535  }
536  }else{
537  *mx = mid_pred(A[0], B[0], C[0]);
538  *my = mid_pred(A[1], B[1], C[1]);
539  }
540 }
541 
545 static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
546 {
547  MpegEncContext *s = &r->s;
548  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
549  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
550  int A[2] = { 0 }, B[2] = { 0 }, C[2] = { 0 };
551  int has_A = 0, has_B = 0, has_C = 0;
552  int mx, my;
553  int i, j;
554  Picture *cur_pic = s->current_picture_ptr;
555  const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
556  int type = cur_pic->mb_type[mb_pos];
557 
558  if((r->avail_cache[6-1] & type) & mask){
559  A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
560  A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
561  has_A = 1;
562  }
563  if((r->avail_cache[6-4] & type) & mask){
564  B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
565  B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
566  has_B = 1;
567  }
568  if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){
569  C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
570  C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
571  has_C = 1;
572  }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){
573  C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
574  C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
575  has_C = 1;
576  }
577 
578  rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
579 
580  mx += r->dmv[dir][0];
581  my += r->dmv[dir][1];
582 
583  for(j = 0; j < 2; j++){
584  for(i = 0; i < 2; i++){
585  cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
586  cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
587  }
588  }
589  if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD){
590  ZERO8x2(cur_pic->motion_val[!dir][mv_pos], s->b8_stride);
591  }
592 }
593 
597 static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir)
598 {
599  MpegEncContext *s = &r->s;
600  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
601  int A[2] = {0}, B[2], C[2];
602  int i, j, k;
603  int mx, my;
604  int* avail = r->avail_cache + avail_indexes[0];
605 
606  if(avail[-1]){
607  A[0] = s->current_picture_ptr->motion_val[0][mv_pos - 1][0];
608  A[1] = s->current_picture_ptr->motion_val[0][mv_pos - 1][1];
609  }
610  if(avail[-4]){
611  B[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][0];
612  B[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][1];
613  }else{
614  B[0] = A[0];
615  B[1] = A[1];
616  }
617  if(!avail[-4 + 2]){
618  if(avail[-4] && (avail[-1])){
619  C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][0];
620  C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][1];
621  }else{
622  C[0] = A[0];
623  C[1] = A[1];
624  }
625  }else{
626  C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][0];
627  C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][1];
628  }
629  mx = mid_pred(A[0], B[0], C[0]);
630  my = mid_pred(A[1], B[1], C[1]);
631  mx += r->dmv[0][0];
632  my += r->dmv[0][1];
633  for(j = 0; j < 2; j++){
634  for(i = 0; i < 2; i++){
635  for(k = 0; k < 2; k++){
636  s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
637  s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my;
638  }
639  }
640  }
641 }
642 
643 static const int chroma_coeffs[3] = { 0, 3, 5 };
644 
660 static inline void rv34_mc(RV34DecContext *r, const int block_type,
661  const int xoff, const int yoff, int mv_off,
662  const int width, const int height, int dir,
663  const int thirdpel, int weighted,
664  qpel_mc_func (*qpel_mc)[16],
666 {
667  MpegEncContext *s = &r->s;
668  uint8_t *Y, *U, *V, *srcY, *srcU, *srcV;
669  int dxy, mx, my, umx, umy, lx, ly, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
670  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off;
671  int is16x16 = 1;
672 
673  if(thirdpel){
674  int chroma_mx, chroma_my;
675  mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
676  my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
677  lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
678  ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
679  chroma_mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
680  chroma_my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
681  umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
682  umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
683  uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];
684  uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3];
685  }else{
686  int cx, cy;
687  mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
688  my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
689  lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3;
690  ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3;
691  cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
692  cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
693  umx = cx >> 2;
694  umy = cy >> 2;
695  uvmx = (cx & 3) << 1;
696  uvmy = (cy & 3) << 1;
697  //due to some flaw RV40 uses the same MC compensation routine for H2V2 and H3V3
698  if(uvmx == 6 && uvmy == 6)
699  uvmx = uvmy = 4;
700  }
701 
703  /* wait for the referenced mb row to be finished */
704  int mb_row = s->mb_y + ((yoff + my + 5 + 8 * height) >> 4);
705  ThreadFrame *f = dir ? &s->next_picture_ptr->tf : &s->last_picture_ptr->tf;
706  ff_thread_await_progress(f, mb_row, 0);
707  }
708 
709  dxy = ly*4 + lx;
710  srcY = dir ? s->next_picture_ptr->f.data[0] : s->last_picture_ptr->f.data[0];
711  srcU = dir ? s->next_picture_ptr->f.data[1] : s->last_picture_ptr->f.data[1];
712  srcV = dir ? s->next_picture_ptr->f.data[2] : s->last_picture_ptr->f.data[2];
713  src_x = s->mb_x * 16 + xoff + mx;
714  src_y = s->mb_y * 16 + yoff + my;
715  uvsrc_x = s->mb_x * 8 + (xoff >> 1) + umx;
716  uvsrc_y = s->mb_y * 8 + (yoff >> 1) + umy;
717  srcY += src_y * s->linesize + src_x;
718  srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
719  srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
720  if(s->h_edge_pos - (width << 3) < 6 || s->v_edge_pos - (height << 3) < 6 ||
721  (unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 4 ||
722  (unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 4) {
723  uint8_t *uvbuf = s->edge_emu_buffer + 22 * s->linesize;
724 
725  srcY -= 2 + 2*s->linesize;
727  s->linesize, s->linesize,
728  (width << 3) + 6, (height << 3) + 6,
729  src_x - 2, src_y - 2, s->h_edge_pos, s->v_edge_pos);
730  srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
731  s->vdsp.emulated_edge_mc(uvbuf, srcU,
732  s->uvlinesize,s->uvlinesize,
733  (width << 2) + 1, (height << 2) + 1,
734  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
735  s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
736  s->uvlinesize, s->uvlinesize,
737  (width << 2) + 1, (height << 2) + 1,
738  uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
739  srcU = uvbuf;
740  srcV = uvbuf + 16;
741  }
742  if(!weighted){
743  Y = s->dest[0] + xoff + yoff *s->linesize;
744  U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
745  V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
746  }else{
747  Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
748  U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
749  V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
750  }
751 
752  if(block_type == RV34_MB_P_16x8){
753  qpel_mc[1][dxy](Y, srcY, s->linesize);
754  Y += 8;
755  srcY += 8;
756  }else if(block_type == RV34_MB_P_8x16){
757  qpel_mc[1][dxy](Y, srcY, s->linesize);
758  Y += 8 * s->linesize;
759  srcY += 8 * s->linesize;
760  }
761  is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
762  qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
763  chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
764  chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
765 }
766 
767 static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
768  const int xoff, const int yoff, int mv_off,
769  const int width, const int height, int dir)
770 {
771  rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
772  r->rdsp.put_pixels_tab,
774 }
775 
776 static void rv4_weight(RV34DecContext *r)
777 {
779  r->tmp_b_block_y[0],
780  r->tmp_b_block_y[1],
781  r->weight1,
782  r->weight2,
783  r->s.linesize);
785  r->tmp_b_block_uv[0],
786  r->tmp_b_block_uv[2],
787  r->weight1,
788  r->weight2,
789  r->s.uvlinesize);
791  r->tmp_b_block_uv[1],
792  r->tmp_b_block_uv[3],
793  r->weight1,
794  r->weight2,
795  r->s.uvlinesize);
796 }
797 
798 static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
799 {
800  int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
801 
802  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
803  r->rdsp.put_pixels_tab,
805  if(!weighted){
806  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
807  r->rdsp.avg_pixels_tab,
809  }else{
810  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
811  r->rdsp.put_pixels_tab,
813  rv4_weight(r);
814  }
815 }
816 
818 {
819  int i, j;
820  int weighted = !r->rv30 && r->weight1 != 8192;
821 
822  for(j = 0; j < 2; j++)
823  for(i = 0; i < 2; i++){
824  rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
825  weighted,
826  r->rdsp.put_pixels_tab,
828  rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
829  weighted,
830  weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
832  }
833  if(weighted)
834  rv4_weight(r);
835 }
836 
838 static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
839 
844 static int rv34_decode_mv(RV34DecContext *r, int block_type)
845 {
846  MpegEncContext *s = &r->s;
847  GetBitContext *gb = &s->gb;
848  int i, j, k, l;
849  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
850  int next_bt;
851 
852  memset(r->dmv, 0, sizeof(r->dmv));
853  for(i = 0; i < num_mvs[block_type]; i++){
854  r->dmv[i][0] = svq3_get_se_golomb(gb);
855  r->dmv[i][1] = svq3_get_se_golomb(gb);
856  }
857  switch(block_type){
858  case RV34_MB_TYPE_INTRA:
860  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
861  return 0;
862  case RV34_MB_SKIP:
863  if(s->pict_type == AV_PICTURE_TYPE_P){
864  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
865  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
866  break;
867  }
868  case RV34_MB_B_DIRECT:
869  //surprisingly, it uses motion scheme from next reference frame
870  /* wait for the current mb row to be finished */
873 
874  next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
875  if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
876  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
877  ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
878  }else
879  for(j = 0; j < 2; j++)
880  for(i = 0; i < 2; i++)
881  for(k = 0; k < 2; k++)
882  for(l = 0; l < 2; l++)
883  s->current_picture_ptr->motion_val[l][mv_pos + i + j*s->b8_stride][k] = calc_add_mv(r, l, s->next_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][k]);
884  if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
885  rv34_mc_2mv(r, block_type);
886  else
887  rv34_mc_2mv_skip(r);
888  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
889  break;
890  case RV34_MB_P_16x16:
891  case RV34_MB_P_MIX16x16:
892  rv34_pred_mv(r, block_type, 0, 0);
893  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
894  break;
895  case RV34_MB_B_FORWARD:
896  case RV34_MB_B_BACKWARD:
897  r->dmv[1][0] = r->dmv[0][0];
898  r->dmv[1][1] = r->dmv[0][1];
899  if(r->rv30)
900  rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
901  else
902  rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
903  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
904  break;
905  case RV34_MB_P_16x8:
906  case RV34_MB_P_8x16:
907  rv34_pred_mv(r, block_type, 0, 0);
908  rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
909  if(block_type == RV34_MB_P_16x8){
910  rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
911  rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
912  }
913  if(block_type == RV34_MB_P_8x16){
914  rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
915  rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
916  }
917  break;
918  case RV34_MB_B_BIDIR:
919  rv34_pred_mv_b (r, block_type, 0);
920  rv34_pred_mv_b (r, block_type, 1);
921  rv34_mc_2mv (r, block_type);
922  break;
923  case RV34_MB_P_8x8:
924  for(i=0;i< 4;i++){
925  rv34_pred_mv(r, block_type, i, i);
926  rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
927  }
928  break;
929  }
930 
931  return 0;
932 } // mv group
934 
940 static const int ittrans[9] = {
943 };
944 
946 static const int ittrans16[4] = {
948 };
949 
953 static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
954 {
955  uint8_t *prev = dst - stride + 4;
956  uint32_t topleft;
957 
958  if(!up && !left)
959  itype = DC_128_PRED;
960  else if(!up){
961  if(itype == VERT_PRED) itype = HOR_PRED;
962  if(itype == DC_PRED) itype = LEFT_DC_PRED;
963  }else if(!left){
964  if(itype == HOR_PRED) itype = VERT_PRED;
965  if(itype == DC_PRED) itype = TOP_DC_PRED;
967  }
968  if(!down){
970  if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
971  if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
972  }
973  if(!right && up){
974  topleft = dst[-stride + 3] * 0x01010101u;
975  prev = (uint8_t*)&topleft;
976  }
977  r->h.pred4x4[itype](dst, prev, stride);
978 }
979 
980 static inline int adjust_pred16(int itype, int up, int left)
981 {
982  if(!up && !left)
983  itype = DC_128_PRED8x8;
984  else if(!up){
985  if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
986  if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
987  if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
988  }else if(!left){
989  if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
990  if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
991  if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
992  }
993  return itype;
994 }
995 
996 static inline void rv34_process_block(RV34DecContext *r,
997  uint8_t *pdst, int stride,
998  int fc, int sc, int q_dc, int q_ac)
999 {
1000  MpegEncContext *s = &r->s;
1001  int16_t *ptr = s->block[0];
1002  int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
1003  fc, sc, q_dc, q_ac, q_ac);
1004  if(has_ac){
1005  r->rdsp.rv34_idct_add(pdst, stride, ptr);
1006  }else{
1007  r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1008  ptr[0] = 0;
1009  }
1010 }
1011 
1012 static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1013 {
1014  LOCAL_ALIGNED_16(int16_t, block16, [16]);
1015  MpegEncContext *s = &r->s;
1016  GetBitContext *gb = &s->gb;
1017  int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1018  q_ac = rv34_qscale_tab[s->qscale];
1019  uint8_t *dst = s->dest[0];
1020  int16_t *ptr = s->block[0];
1021  int i, j, itype, has_ac;
1022 
1023  memset(block16, 0, 16 * sizeof(*block16));
1024 
1025  has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1026  if(has_ac)
1027  r->rdsp.rv34_inv_transform(block16);
1028  else
1029  r->rdsp.rv34_inv_transform_dc(block16);
1030 
1031  itype = ittrans16[intra_types[0]];
1032  itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1033  r->h.pred16x16[itype](dst, s->linesize);
1034 
1035  for(j = 0; j < 4; j++){
1036  for(i = 0; i < 4; i++, cbp >>= 1){
1037  int dc = block16[i + j*4];
1038 
1039  if(cbp & 1){
1040  has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1041  }else
1042  has_ac = 0;
1043 
1044  if(has_ac){
1045  ptr[0] = dc;
1046  r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1047  }else
1048  r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1049  }
1050 
1051  dst += 4*s->linesize;
1052  }
1053 
1054  itype = ittrans16[intra_types[0]];
1055  if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1056  itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1057 
1058  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1059  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1060 
1061  for(j = 1; j < 3; j++){
1062  dst = s->dest[j];
1063  r->h.pred8x8[itype](dst, s->uvlinesize);
1064  for(i = 0; i < 4; i++, cbp >>= 1){
1065  uint8_t *pdst;
1066  if(!(cbp & 1)) continue;
1067  pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1068 
1069  rv34_process_block(r, pdst, s->uvlinesize,
1070  r->chroma_vlc, 1, q_dc, q_ac);
1071  }
1072  }
1073 }
1074 
1075 static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1076 {
1077  MpegEncContext *s = &r->s;
1078  uint8_t *dst = s->dest[0];
1079  int avail[6*8] = {0};
1080  int i, j, k;
1081  int idx, q_ac, q_dc;
1082 
1083  // Set neighbour information.
1084  if(r->avail_cache[1])
1085  avail[0] = 1;
1086  if(r->avail_cache[2])
1087  avail[1] = avail[2] = 1;
1088  if(r->avail_cache[3])
1089  avail[3] = avail[4] = 1;
1090  if(r->avail_cache[4])
1091  avail[5] = 1;
1092  if(r->avail_cache[5])
1093  avail[8] = avail[16] = 1;
1094  if(r->avail_cache[9])
1095  avail[24] = avail[32] = 1;
1096 
1097  q_ac = rv34_qscale_tab[s->qscale];
1098  for(j = 0; j < 4; j++){
1099  idx = 9 + j*8;
1100  for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1101  rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1102  avail[idx] = 1;
1103  if(!(cbp & 1)) continue;
1104 
1105  rv34_process_block(r, dst, s->linesize,
1106  r->luma_vlc, 0, q_ac, q_ac);
1107  }
1108  dst += s->linesize * 4 - 4*4;
1109  intra_types += r->intra_types_stride;
1110  }
1111 
1112  intra_types -= r->intra_types_stride * 4;
1113 
1114  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1115  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1116 
1117  for(k = 0; k < 2; k++){
1118  dst = s->dest[1+k];
1119  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1120 
1121  for(j = 0; j < 2; j++){
1122  int* acache = r->avail_cache + 6 + j*4;
1123  for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1124  int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1125  rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1126  acache[0] = 1;
1127 
1128  if(!(cbp&1)) continue;
1129 
1130  rv34_process_block(r, dst + 4*i, s->uvlinesize,
1131  r->chroma_vlc, 1, q_dc, q_ac);
1132  }
1133 
1134  dst += 4*s->uvlinesize;
1135  }
1136  }
1137 }
1138 
1139 static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1140 {
1141  int d;
1142  d = motion_val[0][0] - motion_val[-step][0];
1143  if(d < -3 || d > 3)
1144  return 1;
1145  d = motion_val[0][1] - motion_val[-step][1];
1146  if(d < -3 || d > 3)
1147  return 1;
1148  return 0;
1149 }
1150 
1152 {
1153  MpegEncContext *s = &r->s;
1154  int hmvmask = 0, vmvmask = 0, i, j;
1155  int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1156  int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
1157  for(j = 0; j < 16; j += 8){
1158  for(i = 0; i < 2; i++){
1159  if(is_mv_diff_gt_3(motion_val + i, 1))
1160  vmvmask |= 0x11 << (j + i*2);
1161  if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1162  hmvmask |= 0x03 << (j + i*2);
1163  }
1164  motion_val += s->b8_stride;
1165  }
1166  if(s->first_slice_line)
1167  hmvmask &= ~0x000F;
1168  if(!s->mb_x)
1169  vmvmask &= ~0x1111;
1170  if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1171  vmvmask |= (vmvmask & 0x4444) >> 1;
1172  hmvmask |= (hmvmask & 0x0F00) >> 4;
1173  if(s->mb_x)
1174  r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1175  if(!s->first_slice_line)
1176  r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1177  }
1178  return hmvmask | vmvmask;
1179 }
1180 
1181 static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1182 {
1183  MpegEncContext *s = &r->s;
1184  GetBitContext *gb = &s->gb;
1185  uint8_t *dst = s->dest[0];
1186  int16_t *ptr = s->block[0];
1187  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1188  int cbp, cbp2;
1189  int q_dc, q_ac, has_ac;
1190  int i, j;
1191  int dist;
1192 
1193  // Calculate which neighbours are available. Maybe it's worth optimizing too.
1194  memset(r->avail_cache, 0, sizeof(r->avail_cache));
1195  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1196  dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1197  if(s->mb_x && dist)
1198  r->avail_cache[5] =
1199  r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1200  if(dist >= s->mb_width)
1201  r->avail_cache[2] =
1202  r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1203  if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1204  r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1205  if(s->mb_x && dist > s->mb_width)
1206  r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1207 
1208  s->qscale = r->si.quant;
1209  cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1210  r->cbp_luma [mb_pos] = cbp;
1211  r->cbp_chroma[mb_pos] = cbp >> 16;
1212  r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1213  s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1214 
1215  if(cbp == -1)
1216  return -1;
1217 
1218  if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
1219  if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1220  else rv34_output_intra(r, intra_types, cbp);
1221  return 0;
1222  }
1223 
1224  if(r->is16){
1225  // Only for RV34_MB_P_MIX16x16
1226  LOCAL_ALIGNED_16(int16_t, block16, [16]);
1227  memset(block16, 0, 16 * sizeof(*block16));
1228  q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1229  q_ac = rv34_qscale_tab[s->qscale];
1230  if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1231  r->rdsp.rv34_inv_transform(block16);
1232  else
1233  r->rdsp.rv34_inv_transform_dc(block16);
1234 
1235  q_ac = rv34_qscale_tab[s->qscale];
1236 
1237  for(j = 0; j < 4; j++){
1238  for(i = 0; i < 4; i++, cbp >>= 1){
1239  int dc = block16[i + j*4];
1240 
1241  if(cbp & 1){
1242  has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1243  }else
1244  has_ac = 0;
1245 
1246  if(has_ac){
1247  ptr[0] = dc;
1248  r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1249  }else
1250  r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1251  }
1252 
1253  dst += 4*s->linesize;
1254  }
1255 
1256  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1257  }else{
1258  q_ac = rv34_qscale_tab[s->qscale];
1259 
1260  for(j = 0; j < 4; j++){
1261  for(i = 0; i < 4; i++, cbp >>= 1){
1262  if(!(cbp & 1)) continue;
1263 
1264  rv34_process_block(r, dst + 4*i, s->linesize,
1265  r->luma_vlc, 0, q_ac, q_ac);
1266  }
1267  dst += 4*s->linesize;
1268  }
1269  }
1270 
1271  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1272  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1273 
1274  for(j = 1; j < 3; j++){
1275  dst = s->dest[j];
1276  for(i = 0; i < 4; i++, cbp >>= 1){
1277  uint8_t *pdst;
1278  if(!(cbp & 1)) continue;
1279  pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1280 
1281  rv34_process_block(r, pdst, s->uvlinesize,
1282  r->chroma_vlc, 1, q_dc, q_ac);
1283  }
1284  }
1285 
1286  return 0;
1287 }
1288 
1289 static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1290 {
1291  MpegEncContext *s = &r->s;
1292  int cbp, dist;
1293  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1294 
1295  // Calculate which neighbours are available. Maybe it's worth optimizing too.
1296  memset(r->avail_cache, 0, sizeof(r->avail_cache));
1297  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1298  dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1299  if(s->mb_x && dist)
1300  r->avail_cache[5] =
1301  r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1302  if(dist >= s->mb_width)
1303  r->avail_cache[2] =
1304  r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1305  if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1306  r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1307  if(s->mb_x && dist > s->mb_width)
1308  r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1309 
1310  s->qscale = r->si.quant;
1311  cbp = rv34_decode_intra_mb_header(r, intra_types);
1312  r->cbp_luma [mb_pos] = cbp;
1313  r->cbp_chroma[mb_pos] = cbp >> 16;
1314  r->deblock_coefs[mb_pos] = 0xFFFF;
1315  s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1316 
1317  if(cbp == -1)
1318  return -1;
1319 
1320  if(r->is16){
1321  rv34_output_i16x16(r, intra_types, cbp);
1322  return 0;
1323  }
1324 
1325  rv34_output_intra(r, intra_types, cbp);
1326  return 0;
1327 }
1328 
1330 {
1331  int bits;
1332  if(s->mb_y >= s->mb_height)
1333  return 1;
1334  if(!s->mb_num_left)
1335  return 1;
1336  if(r->s.mb_skip_run > 1)
1337  return 0;
1338  bits = get_bits_left(&s->gb);
1339  if(bits < 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1340  return 1;
1341  return 0;
1342 }
1343 
1344 
1346 {
1348  r->intra_types = NULL;
1350  av_freep(&r->mb_type);
1351  av_freep(&r->cbp_luma);
1352  av_freep(&r->cbp_chroma);
1353  av_freep(&r->deblock_coefs);
1354 }
1355 
1356 
1358 {
1359  r->intra_types_stride = r->s.mb_width * 4 + 4;
1360 
1361  r->cbp_chroma = av_malloc(r->s.mb_stride * r->s.mb_height *
1362  sizeof(*r->cbp_chroma));
1363  r->cbp_luma = av_malloc(r->s.mb_stride * r->s.mb_height *
1364  sizeof(*r->cbp_luma));
1365  r->deblock_coefs = av_malloc(r->s.mb_stride * r->s.mb_height *
1366  sizeof(*r->deblock_coefs));
1368  sizeof(*r->intra_types_hist));
1369  r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1370  sizeof(*r->mb_type));
1371 
1372  if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1373  r->intra_types_hist && r->mb_type)) {
1374  rv34_decoder_free(r);
1375  return AVERROR(ENOMEM);
1376  }
1377 
1379 
1380  return 0;
1381 }
1382 
1383 
1385 {
1386  rv34_decoder_free(r);
1387  return rv34_decoder_alloc(r);
1388 }
1389 
1390 
1391 static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1392 {
1393  MpegEncContext *s = &r->s;
1394  GetBitContext *gb = &s->gb;
1395  int mb_pos, slice_type;
1396  int res;
1397 
1398  init_get_bits(&r->s.gb, buf, buf_size*8);
1399  res = r->parse_slice_header(r, gb, &r->si);
1400  if(res < 0){
1401  av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1402  return -1;
1403  }
1404 
1405  slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1406  if (slice_type != s->pict_type) {
1407  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1408  return AVERROR_INVALIDDATA;
1409  }
1410 
1411  r->si.end = end;
1412  s->qscale = r->si.quant;
1413  s->mb_num_left = r->si.end - r->si.start;
1414  r->s.mb_skip_run = 0;
1415 
1416  mb_pos = s->mb_x + s->mb_y * s->mb_width;
1417  if(r->si.start != mb_pos){
1418  av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1419  s->mb_x = r->si.start % s->mb_width;
1420  s->mb_y = r->si.start / s->mb_width;
1421  }
1422  memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1423  s->first_slice_line = 1;
1424  s->resync_mb_x = s->mb_x;
1425  s->resync_mb_y = s->mb_y;
1426 
1428  while(!check_slice_end(r, s)) {
1430 
1431  if(r->si.type)
1432  res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1433  else
1434  res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1435  if(res < 0){
1436  ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1437  return -1;
1438  }
1439  if (++s->mb_x == s->mb_width) {
1440  s->mb_x = 0;
1441  s->mb_y++;
1443 
1444  memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1445  memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1446 
1447  if(r->loop_filter && s->mb_y >= 2)
1448  r->loop_filter(r, s->mb_y - 2);
1449 
1452  s->mb_y - 2, 0);
1453 
1454  }
1455  if(s->mb_x == s->resync_mb_x)
1456  s->first_slice_line=0;
1457  s->mb_num_left--;
1458  }
1459  ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1460 
1461  return s->mb_y == s->mb_height;
1462 }
1463  // recons group end
1465 
1470 {
1471  RV34DecContext *r = avctx->priv_data;
1472  MpegEncContext *s = &r->s;
1473  int ret;
1474 
1476  s->avctx = avctx;
1477  s->out_format = FMT_H263;
1478  s->codec_id = avctx->codec_id;
1479 
1480  s->width = avctx->width;
1481  s->height = avctx->height;
1482 
1483  r->s.avctx = avctx;
1484  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1485  avctx->has_b_frames = 1;
1486  s->low_delay = 0;
1487 
1488  if ((ret = ff_MPV_common_init(s)) < 0)
1489  return ret;
1490 
1491  ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1492 
1493 #if CONFIG_RV30_DECODER
1494  if (avctx->codec_id == AV_CODEC_ID_RV30)
1495  ff_rv30dsp_init(&r->rdsp);
1496 #endif
1497 #if CONFIG_RV40_DECODER
1498  if (avctx->codec_id == AV_CODEC_ID_RV40)
1499  ff_rv40dsp_init(&r->rdsp);
1500 #endif
1501 
1502  if ((ret = rv34_decoder_alloc(r)) < 0) {
1503  ff_MPV_common_end(&r->s);
1504  return ret;
1505  }
1506 
1507  if(!intra_vlcs[0].cbppattern[0].bits)
1508  rv34_init_tables();
1509 
1510  avctx->internal->allocate_progress = 1;
1511 
1512  return 0;
1513 }
1514 
1516 {
1517  int err;
1518  RV34DecContext *r = avctx->priv_data;
1519 
1520  r->s.avctx = avctx;
1521 
1522  if (avctx->internal->is_copy) {
1523  r->tmp_b_block_base = NULL;
1524  if ((err = ff_MPV_common_init(&r->s)) < 0)
1525  return err;
1526  if ((err = rv34_decoder_alloc(r)) < 0) {
1527  ff_MPV_common_end(&r->s);
1528  return err;
1529  }
1530  }
1531 
1532  return 0;
1533 }
1534 
1536 {
1537  RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1538  MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1539  int err;
1540 
1541  if (dst == src || !s1->context_initialized)
1542  return 0;
1543 
1544  if (s->height != s1->height || s->width != s1->width) {
1545  s->height = s1->height;
1546  s->width = s1->width;
1547  if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1548  return err;
1549  if ((err = rv34_decoder_realloc(r)) < 0)
1550  return err;
1551  }
1552 
1553  if ((err = ff_mpeg_update_thread_context(dst, src)))
1554  return err;
1555 
1556  r->cur_pts = r1->cur_pts;
1557  r->last_pts = r1->last_pts;
1558  r->next_pts = r1->next_pts;
1559 
1560  memset(&r->si, 0, sizeof(r->si));
1561 
1562  return 0;
1563 }
1564 
1565 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
1566 {
1567  if(avctx->slice_count) return avctx->slice_offset[n];
1568  else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1569 }
1570 
1571 static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1572 {
1573  RV34DecContext *r = avctx->priv_data;
1574  MpegEncContext *s = &r->s;
1575  int got_picture = 0, ret;
1576 
1577  ff_er_frame_end(&s->er);
1578  ff_MPV_frame_end(s);
1579  s->mb_num_left = 0;
1580 
1583 
1584  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1585  if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
1586  return ret;
1588  got_picture = 1;
1589  } else if (s->last_picture_ptr != NULL) {
1590  if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
1591  return ret;
1593  got_picture = 1;
1594  }
1595 
1596  return got_picture;
1597 }
1598 
1600  void *data, int *got_picture_ptr,
1601  AVPacket *avpkt)
1602 {
1603  const uint8_t *buf = avpkt->data;
1604  int buf_size = avpkt->size;
1605  RV34DecContext *r = avctx->priv_data;
1606  MpegEncContext *s = &r->s;
1607  AVFrame *pict = data;
1608  SliceInfo si;
1609  int i, ret;
1610  int slice_count;
1611  const uint8_t *slices_hdr = NULL;
1612  int last = 0;
1613 
1614  /* no supplementary picture */
1615  if (buf_size == 0) {
1616  /* special case for last picture */
1617  if (s->low_delay==0 && s->next_picture_ptr) {
1618  if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)
1619  return ret;
1620  s->next_picture_ptr = NULL;
1621 
1622  *got_picture_ptr = 1;
1623  }
1624  return 0;
1625  }
1626 
1627  if(!avctx->slice_count){
1628  slice_count = (*buf++) + 1;
1629  slices_hdr = buf + 4;
1630  buf += 8 * slice_count;
1631  buf_size -= 1 + 8 * slice_count;
1632  }else
1633  slice_count = avctx->slice_count;
1634 
1635  //parse first slice header to check whether this frame can be decoded
1636  if(get_slice_offset(avctx, slices_hdr, 0) < 0 ||
1637  get_slice_offset(avctx, slices_hdr, 0) > buf_size){
1638  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1639  return AVERROR_INVALIDDATA;
1640  }
1641  init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), (buf_size-get_slice_offset(avctx, slices_hdr, 0))*8);
1642  if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
1643  av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
1644  return AVERROR_INVALIDDATA;
1645  }
1646  if ((!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) &&
1647  si.type == AV_PICTURE_TYPE_B) {
1648  av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
1649  "reference data.\n");
1650  return AVERROR_INVALIDDATA;
1651  }
1652  if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
1653  || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
1654  || avctx->skip_frame >= AVDISCARD_ALL)
1655  return avpkt->size;
1656 
1657  /* first slice */
1658  if (si.start == 0) {
1659  if (s->mb_num_left > 0) {
1660  av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.",
1661  s->mb_num_left);
1662  ff_er_frame_end(&s->er);
1663  ff_MPV_frame_end(s);
1664  }
1665 
1666  if (s->width != si.width || s->height != si.height) {
1667  int err;
1668 
1669  av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1670  si.width, si.height);
1671 
1672  s->width = si.width;
1673  s->height = si.height;
1674 
1675  err = ff_set_dimensions(s->avctx, s->width, s->height);
1676  if (err < 0)
1677  return err;
1678 
1679  if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1680  return err;
1681  if ((err = rv34_decoder_realloc(r)) < 0)
1682  return err;
1683  }
1684  s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1685  if (ff_MPV_frame_start(s, s->avctx) < 0)
1686  return -1;
1688  if (!r->tmp_b_block_base) {
1689  int i;
1690 
1691  r->tmp_b_block_base = av_malloc(s->linesize * 48);
1692  for (i = 0; i < 2; i++)
1693  r->tmp_b_block_y[i] = r->tmp_b_block_base
1694  + i * 16 * s->linesize;
1695  for (i = 0; i < 4; i++)
1696  r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1697  + (i >> 1) * 8 * s->uvlinesize
1698  + (i & 1) * 16;
1699  }
1700  r->cur_pts = si.pts;
1701  if (s->pict_type != AV_PICTURE_TYPE_B) {
1702  r->last_pts = r->next_pts;
1703  r->next_pts = r->cur_pts;
1704  } else {
1705  int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1706  int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1707  int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1708 
1709  if(!refdist){
1710  r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1711  r->scaled_weight = 0;
1712  }else{
1713  r->mv_weight1 = (dist0 << 14) / refdist;
1714  r->mv_weight2 = (dist1 << 14) / refdist;
1715  if((r->mv_weight1|r->mv_weight2) & 511){
1716  r->weight1 = r->mv_weight1;
1717  r->weight2 = r->mv_weight2;
1718  r->scaled_weight = 0;
1719  }else{
1720  r->weight1 = r->mv_weight1 >> 9;
1721  r->weight2 = r->mv_weight2 >> 9;
1722  r->scaled_weight = 1;
1723  }
1724  }
1725  }
1726  s->mb_x = s->mb_y = 0;
1728  } else if (HAVE_THREADS &&
1730  av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1731  "multithreading mode (start MB is %d).\n", si.start);
1732  return AVERROR_INVALIDDATA;
1733  }
1734 
1735  for(i = 0; i < slice_count; i++){
1736  int offset = get_slice_offset(avctx, slices_hdr, i);
1737  int size;
1738  if(i+1 == slice_count)
1739  size = buf_size - offset;
1740  else
1741  size = get_slice_offset(avctx, slices_hdr, i+1) - offset;
1742 
1743  if(offset < 0 || offset > buf_size){
1744  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1745  break;
1746  }
1747 
1748  r->si.end = s->mb_width * s->mb_height;
1749  s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1750 
1751  if(i+1 < slice_count){
1752  if (get_slice_offset(avctx, slices_hdr, i+1) < 0 ||
1753  get_slice_offset(avctx, slices_hdr, i+1) > buf_size) {
1754  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1755  break;
1756  }
1757  init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, i+1), (buf_size-get_slice_offset(avctx, slices_hdr, i+1))*8);
1758  if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1759  if(i+2 < slice_count)
1760  size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1761  else
1762  size = buf_size - offset;
1763  }else
1764  r->si.end = si.start;
1765  }
1766  if (size < 0 || size > buf_size - offset) {
1767  av_log(avctx, AV_LOG_ERROR, "Slice size is invalid\n");
1768  break;
1769  }
1770  last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1771  if(last)
1772  break;
1773  }
1774 
1775  if (s->current_picture_ptr) {
1776  if (last) {
1777  if(r->loop_filter)
1778  r->loop_filter(r, s->mb_height - 1);
1779 
1780  ret = finish_frame(avctx, pict);
1781  if (ret < 0)
1782  return ret;
1783  *got_picture_ptr = ret;
1784  } else if (HAVE_THREADS &&
1786  av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1787  /* always mark the current frame as finished, frame-mt supports
1788  * only complete frames */
1789  ff_er_frame_end(&s->er);
1790  ff_MPV_frame_end(s);
1791  s->mb_num_left = 0;
1793  return AVERROR_INVALIDDATA;
1794  }
1795  }
1796 
1797  return avpkt->size;
1798 }
1799 
1801 {
1802  RV34DecContext *r = avctx->priv_data;
1803 
1804  ff_MPV_common_end(&r->s);
1805  rv34_decoder_free(r);
1806 
1807  return 0;
1808 }