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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 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  * RV30/40 decoder common data
25  */
26 
27 #include "libavutil/imgutils.h"
28 #include "libavutil/internal.h"
29 
30 #include "avcodec.h"
31 #include "error_resilience.h"
32 #include "mpegvideo.h"
33 #include "golomb.h"
34 #include "internal.h"
35 #include "mathops.h"
36 #include "rectangle.h"
37 #include "thread.h"
38 
39 #include "rv34vlc.h"
40 #include "rv34data.h"
41 #include "rv34.h"
42 
43 static inline void ZERO8x2(void* dst, int stride)
44 {
45  fill_rectangle(dst, 1, 2, stride, 0, 4);
46  fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
47 }
48 
49 /** translation of RV30/40 macroblock types to lavc ones */
50 static const int rv34_mb_type_to_lavc[12] = {
63 };
64 
65 
67 
68 static int rv34_decode_mv(RV34DecContext *r, int block_type);
69 
70 /**
71  * @name RV30/40 VLC generating functions
72  * @{
73  */
74 
75 static const int table_offs[] = {
76  0, 1818, 3622, 4144, 4698, 5234, 5804, 5868, 5900, 5932,
77  5996, 6252, 6316, 6348, 6380, 7674, 8944, 10274, 11668, 12250,
78  14060, 15846, 16372, 16962, 17512, 18148, 18180, 18212, 18244, 18308,
79  18564, 18628, 18660, 18692, 20036, 21314, 22648, 23968, 24614, 26384,
80  28190, 28736, 29366, 29938, 30608, 30640, 30672, 30704, 30768, 31024,
81  31088, 31120, 31184, 32570, 33898, 35236, 36644, 37286, 39020, 40802,
82  41368, 42052, 42692, 43348, 43380, 43412, 43444, 43476, 43604, 43668,
83  43700, 43732, 45100, 46430, 47778, 49160, 49802, 51550, 53340, 53972,
84  54648, 55348, 55994, 56122, 56154, 56186, 56218, 56346, 56410, 56442,
85  56474, 57878, 59290, 60636, 62036, 62682, 64460, 64524, 64588, 64716,
86  64844, 66076, 67466, 67978, 68542, 69064, 69648, 70296, 72010, 72074,
87  72138, 72202, 72330, 73572, 74936, 75454, 76030, 76566, 77176, 77822,
88  79582, 79646, 79678, 79742, 79870, 81180, 82536, 83064, 83672, 84242,
89  84934, 85576, 87384, 87448, 87480, 87544, 87672, 88982, 90340, 90902,
90  91598, 92182, 92846, 93488, 95246, 95278, 95310, 95374, 95502, 96878,
91  98266, 98848, 99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416,
92  103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398,
93  111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592
94 };
95 
96 static VLC_TYPE table_data[117592][2];
97 
98 /**
99  * Generate VLC from codeword lengths.
100  * @param bits codeword lengths (zeroes are accepted)
101  * @param size length of input data
102  * @param vlc output VLC
103  * @param insyms symbols for input codes (NULL for default ones)
104  * @param num VLC table number (for static initialization)
105  */
106 static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms,
107  const int num)
108 {
109  int i;
110  int counts[17] = {0}, codes[17];
111  uint16_t cw[MAX_VLC_SIZE], syms[MAX_VLC_SIZE];
113  int maxbits = 0, realsize = 0;
114 
115  for(i = 0; i < size; i++){
116  if(bits[i]){
117  bits2[realsize] = bits[i];
118  syms[realsize] = insyms ? insyms[i] : i;
119  realsize++;
120  maxbits = FFMAX(maxbits, bits[i]);
121  counts[bits[i]]++;
122  }
123  }
124 
125  codes[0] = 0;
126  for(i = 0; i < 16; i++)
127  codes[i+1] = (codes[i] + counts[i]) << 1;
128  for(i = 0; i < realsize; i++)
129  cw[i] = codes[bits2[i]]++;
130 
131  vlc->table = &table_data[table_offs[num]];
132  vlc->table_allocated = table_offs[num + 1] - table_offs[num];
133  ff_init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize,
134  bits2, 1, 1,
135  cw, 2, 2,
136  syms, 2, 2, INIT_VLC_USE_NEW_STATIC);
137 }
138 
139 /**
140  * Initialize all tables.
141  */
142 static av_cold void rv34_init_tables(void)
143 {
144  int i, j, k;
145 
146  for(i = 0; i < NUM_INTRA_TABLES; i++){
147  for(j = 0; j < 2; j++){
148  rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE, &intra_vlcs[i].cbppattern[j], NULL, 19*i + 0 + j);
149  rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL, 19*i + 2 + j);
150  rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL, 19*i + 4 + j);
151  for(k = 0; k < 4; k++){
152  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);
153  }
154  }
155  for(j = 0; j < 4; j++){
156  rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL, 19*i + 14 + j);
157  }
158  rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18);
159  }
160 
161  for(i = 0; i < NUM_INTER_TABLES; i++){
162  rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL, i*12 + 95);
163  for(j = 0; j < 4; j++){
164  rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code, i*12 + 96 + j);
165  }
166  for(j = 0; j < 2; j++){
167  rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j], NULL, i*12 + 100 + j);
168  rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL, i*12 + 102 + j);
169  rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL, i*12 + 104 + j);
170  }
171  rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106);
172  }
173 }
174 
175 /** @} */ // vlc group
176 
177 /**
178  * @name RV30/40 4x4 block decoding functions
179  * @{
180  */
181 
182 /**
183  * Decode coded block pattern.
184  */
185 static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
186 {
187  int pattern, code, cbp=0;
188  int ones;
189  static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
190  static const int shifts[4] = { 0, 2, 8, 10 };
191  const int *curshift = shifts;
192  int i, t, mask;
193 
194  code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
195  pattern = code & 0xF;
196  code >>= 4;
197 
198  ones = rv34_count_ones[pattern];
199 
200  for(mask = 8; mask; mask >>= 1, curshift++){
201  if(pattern & mask)
202  cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
203  }
204 
205  for(i = 0; i < 4; i++){
206  t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
207  if(t == 1)
208  cbp |= cbp_masks[get_bits1(gb)] << i;
209  if(t == 2)
210  cbp |= cbp_masks[2] << i;
211  }
212  return cbp;
213 }
214 
215 /**
216  * Get one coefficient value from the bitstream and store it.
217  */
218 static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
219 {
220  if(coef){
221  if(coef == esc){
222  coef = get_vlc2(gb, vlc->table, 9, 2);
223  if(coef > 23){
224  coef -= 23;
225  coef = 22 + ((1 << coef) | get_bits(gb, coef));
226  }
227  coef += esc;
228  }
229  if(get_bits1(gb))
230  coef = -coef;
231  *dst = (coef*q + 8) >> 4;
232  }
233 }
234 
235 /**
236  * Decode 2x2 subblock of coefficients.
237  */
238 static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
239 {
240  int flags = modulo_three_table[code];
241 
242  decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
243  if(is_block2){
244  decode_coeff(dst+1*4+0, (flags >> 4) & 3, 2, gb, vlc, q);
245  decode_coeff(dst+0*4+1, (flags >> 2) & 3, 2, gb, vlc, q);
246  }else{
247  decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q);
248  decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q);
249  }
250  decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
251 }
252 
253 /**
254  * Decode a single coefficient.
255  */
256 static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
257 {
258  int coeff = modulo_three_table[code] >> 6;
259  decode_coeff(dst, coeff, 3, gb, vlc, q);
260 }
261 
262 static inline void decode_subblock3(int16_t *dst, int code, GetBitContext *gb, VLC *vlc,
263  int q_dc, int q_ac1, int q_ac2)
264 {
265  int flags = modulo_three_table[code];
266 
267  decode_coeff(dst+0*4+0, (flags >> 6) , 3, gb, vlc, q_dc);
268  decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
269  decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
270  decode_coeff(dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
271 }
272 
273 /**
274  * Decode coefficients for 4x4 block.
275  *
276  * This is done by filling 2x2 subblocks with decoded coefficients
277  * in this order (the same for subblocks and subblock coefficients):
278  * o--o
279  * /
280  * /
281  * o--o
282  */
283 
284 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)
285 {
286  int code, pattern, has_ac = 1;
287 
288  code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
289 
290  pattern = code & 0x7;
291 
292  code >>= 3;
293 
294  if (modulo_three_table[code] & 0x3F) {
295  decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
296  } else {
297  decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
298  if (!pattern)
299  return 0;
300  has_ac = 0;
301  }
302 
303  if(pattern & 4){
304  code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
305  decode_subblock(dst + 4*0+2, code, 0, gb, &rvlc->coefficient, q_ac2);
306  }
307  if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
308  code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
309  decode_subblock(dst + 4*2+0, code, 1, gb, &rvlc->coefficient, q_ac2);
310  }
311  if(pattern & 1){
312  code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
313  decode_subblock(dst + 4*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
314  }
315  return has_ac | pattern;
316 }
317 
318 /**
319  * @name RV30/40 bitstream parsing
320  * @{
321  */
322 
323 /**
324  * Decode starting slice position.
325  * @todo Maybe replace with ff_h263_decode_mba() ?
326  */
328 {
329  int i;
330  for(i = 0; i < 5; i++)
331  if(rv34_mb_max_sizes[i] >= mb_size - 1)
332  break;
333  return rv34_mb_bits_sizes[i];
334 }
335 
336 /**
337  * Select VLC set for decoding from current quantizer, modifier and frame type.
338  */
339 static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
340 {
341  if(mod == 2 && quant < 19) quant += 10;
342  else if(mod && quant < 26) quant += 5;
343  return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]]
344  : &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]];
345 }
346 
347 /**
348  * Decode intra macroblock header and return CBP in case of success, -1 otherwise.
349  */
350 static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
351 {
352  MpegEncContext *s = &r->s;
353  GetBitContext *gb = &s->gb;
354  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
355  int t;
356 
357  r->is16 = get_bits1(gb);
358  if(r->is16){
361  t = get_bits(gb, 2);
362  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
363  r->luma_vlc = 2;
364  }else{
365  if(!r->rv30){
366  if(!get_bits1(gb))
367  av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
368  }
371  if(r->decode_intra_types(r, gb, intra_types) < 0)
372  return -1;
373  r->luma_vlc = 1;
374  }
375 
376  r->chroma_vlc = 0;
377  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
378 
379  return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
380 }
381 
382 /**
383  * Decode inter macroblock header and return CBP in case of success, -1 otherwise.
384  */
385 static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
386 {
387  MpegEncContext *s = &r->s;
388  GetBitContext *gb = &s->gb;
389  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
390  int i, t;
391 
392  r->block_type = r->decode_mb_info(r);
393  if(r->block_type == -1)
394  return -1;
396  r->mb_type[mb_pos] = r->block_type;
397  if(r->block_type == RV34_MB_SKIP){
398  if(s->pict_type == AV_PICTURE_TYPE_P)
399  r->mb_type[mb_pos] = RV34_MB_P_16x16;
400  if(s->pict_type == AV_PICTURE_TYPE_B)
401  r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
402  }
403  r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
404  rv34_decode_mv(r, r->block_type);
405  if(r->block_type == RV34_MB_SKIP){
406  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0]));
407  return 0;
408  }
409  r->chroma_vlc = 1;
410  r->luma_vlc = 0;
411 
412  if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
413  if(r->is16){
414  t = get_bits(gb, 2);
415  fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
416  r->luma_vlc = 2;
417  }else{
418  if(r->decode_intra_types(r, gb, intra_types) < 0)
419  return -1;
420  r->luma_vlc = 1;
421  }
422  r->chroma_vlc = 0;
423  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
424  }else{
425  for(i = 0; i < 16; i++)
426  intra_types[(i & 3) + (i>>2) * r->intra_types_stride] = 0;
427  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
428  if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){
429  r->is16 = 1;
430  r->chroma_vlc = 1;
431  r->luma_vlc = 2;
432  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
433  }
434  }
435 
436  return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
437 }
438 
439 /** @} */ //bitstream functions
440 
441 /**
442  * @name motion vector related code (prediction, reconstruction, motion compensation)
443  * @{
444  */
445 
446 /** macroblock partition width in 8x8 blocks */
447 static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
448 
449 /** macroblock partition height in 8x8 blocks */
450 static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
451 
452 /** availability index for subblocks */
453 static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
454 
455 /**
456  * motion vector prediction
457  *
458  * Motion prediction performed for the block by using median prediction of
459  * motion vectors from the left, top and right top blocks but in corner cases
460  * some other vectors may be used instead.
461  */
462 static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
463 {
464  MpegEncContext *s = &r->s;
465  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
466  int A[2] = {0}, B[2], C[2];
467  int i, j;
468  int mx, my;
469  int* avail = r->avail_cache + avail_indexes[subblock_no];
470  int c_off = part_sizes_w[block_type];
471 
472  mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
473  if(subblock_no == 3)
474  c_off = -1;
475 
476  if(avail[-1]){
477  A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
478  A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
479  }
480  if(avail[-4]){
481  B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
482  B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
483  }else{
484  B[0] = A[0];
485  B[1] = A[1];
486  }
487  if(!avail[c_off-4]){
488  if(avail[-4] && (avail[-1] || r->rv30)){
489  C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
490  C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
491  }else{
492  C[0] = A[0];
493  C[1] = A[1];
494  }
495  }else{
496  C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
497  C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
498  }
499  mx = mid_pred(A[0], B[0], C[0]);
500  my = mid_pred(A[1], B[1], C[1]);
501  mx += r->dmv[dmv_no][0];
502  my += r->dmv[dmv_no][1];
503  for(j = 0; j < part_sizes_h[block_type]; j++){
504  for(i = 0; i < part_sizes_w[block_type]; i++){
505  s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
506  s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
507  }
508  }
509 }
510 
511 #define GET_PTS_DIFF(a, b) ((a - b + 8192) & 0x1FFF)
512 
513 /**
514  * Calculate motion vector component that should be added for direct blocks.
515  */
516 static int calc_add_mv(RV34DecContext *r, int dir, int val)
517 {
518  int mul = dir ? -r->mv_weight2 : r->mv_weight1;
519 
520  return (val * mul + 0x2000) >> 14;
521 }
522 
523 /**
524  * Predict motion vector for B-frame macroblock.
525  */
526 static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2],
527  int A_avail, int B_avail, int C_avail,
528  int *mx, int *my)
529 {
530  if(A_avail + B_avail + C_avail != 3){
531  *mx = A[0] + B[0] + C[0];
532  *my = A[1] + B[1] + C[1];
533  if(A_avail + B_avail + C_avail == 2){
534  *mx /= 2;
535  *my /= 2;
536  }
537  }else{
538  *mx = mid_pred(A[0], B[0], C[0]);
539  *my = mid_pred(A[1], B[1], C[1]);
540  }
541 }
542 
543 /**
544  * motion vector prediction for B-frames
545  */
546 static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
547 {
548  MpegEncContext *s = &r->s;
549  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
550  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
551  int A[2] = { 0 }, B[2] = { 0 }, C[2] = { 0 };
552  int has_A = 0, has_B = 0, has_C = 0;
553  int mx, my;
554  int i, j;
555  Picture *cur_pic = s->current_picture_ptr;
556  const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
557  int type = cur_pic->mb_type[mb_pos];
558 
559  if((r->avail_cache[6-1] & type) & mask){
560  A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
561  A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
562  has_A = 1;
563  }
564  if((r->avail_cache[6-4] & type) & mask){
565  B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
566  B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
567  has_B = 1;
568  }
569  if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){
570  C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
571  C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
572  has_C = 1;
573  }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){
574  C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
575  C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
576  has_C = 1;
577  }
578 
579  rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
580 
581  mx += r->dmv[dir][0];
582  my += r->dmv[dir][1];
583 
584  for(j = 0; j < 2; j++){
585  for(i = 0; i < 2; i++){
586  cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
587  cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
588  }
589  }
590  if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD){
591  ZERO8x2(cur_pic->motion_val[!dir][mv_pos], s->b8_stride);
592  }
593 }
594 
595 /**
596  * motion vector prediction - RV3 version
597  */
598 static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir)
599 {
600  MpegEncContext *s = &r->s;
601  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
602  int A[2] = {0}, B[2], C[2];
603  int i, j, k;
604  int mx, my;
605  int* avail = r->avail_cache + avail_indexes[0];
606 
607  if(avail[-1]){
608  A[0] = s->current_picture_ptr->motion_val[0][mv_pos - 1][0];
609  A[1] = s->current_picture_ptr->motion_val[0][mv_pos - 1][1];
610  }
611  if(avail[-4]){
612  B[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][0];
613  B[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][1];
614  }else{
615  B[0] = A[0];
616  B[1] = A[1];
617  }
618  if(!avail[-4 + 2]){
619  if(avail[-4] && (avail[-1])){
620  C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][0];
621  C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][1];
622  }else{
623  C[0] = A[0];
624  C[1] = A[1];
625  }
626  }else{
627  C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][0];
628  C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][1];
629  }
630  mx = mid_pred(A[0], B[0], C[0]);
631  my = mid_pred(A[1], B[1], C[1]);
632  mx += r->dmv[0][0];
633  my += r->dmv[0][1];
634  for(j = 0; j < 2; j++){
635  for(i = 0; i < 2; i++){
636  for(k = 0; k < 2; k++){
637  s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
638  s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my;
639  }
640  }
641  }
642 }
643 
644 static const int chroma_coeffs[3] = { 0, 3, 5 };
645 
646 /**
647  * generic motion compensation function
648  *
649  * @param r decoder context
650  * @param block_type type of the current block
651  * @param xoff horizontal offset from the start of the current block
652  * @param yoff vertical offset from the start of the current block
653  * @param mv_off offset to the motion vector information
654  * @param width width of the current partition in 8x8 blocks
655  * @param height height of the current partition in 8x8 blocks
656  * @param dir motion compensation direction (i.e. from the last or the next reference frame)
657  * @param thirdpel motion vectors are specified in 1/3 of pixel
658  * @param qpel_mc a set of functions used to perform luma motion compensation
659  * @param chroma_mc a set of functions used to perform chroma motion compensation
660  */
661 static inline void rv34_mc(RV34DecContext *r, const int block_type,
662  const int xoff, const int yoff, int mv_off,
663  const int width, const int height, int dir,
664  const int thirdpel, int weighted,
665  qpel_mc_func (*qpel_mc)[16],
667 {
668  MpegEncContext *s = &r->s;
669  uint8_t *Y, *U, *V, *srcY, *srcU, *srcV;
670  int dxy, mx, my, umx, umy, lx, ly, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
671  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off;
672  int is16x16 = 1;
673 
674  if(thirdpel){
675  int chroma_mx, chroma_my;
676  mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
677  my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
678  lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
679  ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
680  chroma_mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
681  chroma_my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
682  umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
683  umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
684  uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];
685  uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3];
686  }else{
687  int cx, cy;
688  mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
689  my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
690  lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3;
691  ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3;
692  cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
693  cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
694  umx = cx >> 2;
695  umy = cy >> 2;
696  uvmx = (cx & 3) << 1;
697  uvmy = (cy & 3) << 1;
698  //due to some flaw RV40 uses the same MC compensation routine for H2V2 and H3V3
699  if(uvmx == 6 && uvmy == 6)
700  uvmx = uvmy = 4;
701  }
702 
703  if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
704  /* wait for the referenced mb row to be finished */
705  int mb_row = s->mb_y + ((yoff + my + 5 + 8 * height) >> 4);
706  ThreadFrame *f = dir ? &s->next_picture_ptr->tf : &s->last_picture_ptr->tf;
707  ff_thread_await_progress(f, mb_row, 0);
708  }
709 
710  dxy = ly*4 + lx;
711  srcY = dir ? s->next_picture_ptr->f.data[0] : s->last_picture_ptr->f.data[0];
712  srcU = dir ? s->next_picture_ptr->f.data[1] : s->last_picture_ptr->f.data[1];
713  srcV = dir ? s->next_picture_ptr->f.data[2] : s->last_picture_ptr->f.data[2];
714  src_x = s->mb_x * 16 + xoff + mx;
715  src_y = s->mb_y * 16 + yoff + my;
716  uvsrc_x = s->mb_x * 8 + (xoff >> 1) + umx;
717  uvsrc_y = s->mb_y * 8 + (yoff >> 1) + umy;
718  srcY += src_y * s->linesize + src_x;
719  srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
720  srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
721  if(s->h_edge_pos - (width << 3) < 6 || s->v_edge_pos - (height << 3) < 6 ||
722  (unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 4 ||
723  (unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 4) {
724  uint8_t *uvbuf = s->edge_emu_buffer + 22 * s->linesize;
725 
726  srcY -= 2 + 2*s->linesize;
728  (width<<3)+6, (height<<3)+6, src_x - 2, src_y - 2,
729  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, s->uvlinesize, srcU, s->uvlinesize,
732  (width<<2)+1, (height<<2)+1, uvsrc_x, uvsrc_y,
733  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
734  s->vdsp.emulated_edge_mc(uvbuf + 16, s->uvlinesize, srcV, s->uvlinesize,
735  (width<<2)+1, (height<<2)+1, uvsrc_x, uvsrc_y,
736  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
737  srcU = uvbuf;
738  srcV = uvbuf + 16;
739  }
740  if(!weighted){
741  Y = s->dest[0] + xoff + yoff *s->linesize;
742  U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
743  V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
744  }else{
745  Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
746  U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
747  V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
748  }
749 
750  if(block_type == RV34_MB_P_16x8){
751  qpel_mc[1][dxy](Y, srcY, s->linesize);
752  Y += 8;
753  srcY += 8;
754  }else if(block_type == RV34_MB_P_8x16){
755  qpel_mc[1][dxy](Y, srcY, s->linesize);
756  Y += 8 * s->linesize;
757  srcY += 8 * s->linesize;
758  }
759  is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
760  qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
761  chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
762  chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
763 }
764 
765 static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
766  const int xoff, const int yoff, int mv_off,
767  const int width, const int height, int dir)
768 {
769  rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
770  r->rdsp.put_pixels_tab,
772 }
773 
774 static void rv4_weight(RV34DecContext *r)
775 {
777  r->tmp_b_block_y[0],
778  r->tmp_b_block_y[1],
779  r->weight1,
780  r->weight2,
781  r->s.linesize);
783  r->tmp_b_block_uv[0],
784  r->tmp_b_block_uv[2],
785  r->weight1,
786  r->weight2,
787  r->s.uvlinesize);
789  r->tmp_b_block_uv[1],
790  r->tmp_b_block_uv[3],
791  r->weight1,
792  r->weight2,
793  r->s.uvlinesize);
794 }
795 
796 static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
797 {
798  int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
799 
800  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
801  r->rdsp.put_pixels_tab,
803  if(!weighted){
804  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
805  r->rdsp.avg_pixels_tab,
807  }else{
808  rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
809  r->rdsp.put_pixels_tab,
811  rv4_weight(r);
812  }
813 }
814 
816 {
817  int i, j;
818  int weighted = !r->rv30 && r->weight1 != 8192;
819 
820  for(j = 0; j < 2; j++)
821  for(i = 0; i < 2; i++){
822  rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
823  weighted,
824  r->rdsp.put_pixels_tab,
826  rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
827  weighted,
828  weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
830  }
831  if(weighted)
832  rv4_weight(r);
833 }
834 
835 /** number of motion vectors in each macroblock type */
836 static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
837 
838 /**
839  * Decode motion vector differences
840  * and perform motion vector reconstruction and motion compensation.
841  */
842 static int rv34_decode_mv(RV34DecContext *r, int block_type)
843 {
844  MpegEncContext *s = &r->s;
845  GetBitContext *gb = &s->gb;
846  int i, j, k, l;
847  int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
848  int next_bt;
849 
850  memset(r->dmv, 0, sizeof(r->dmv));
851  for(i = 0; i < num_mvs[block_type]; i++){
852  r->dmv[i][0] = svq3_get_se_golomb(gb);
853  r->dmv[i][1] = svq3_get_se_golomb(gb);
854  }
855  switch(block_type){
856  case RV34_MB_TYPE_INTRA:
858  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
859  return 0;
860  case RV34_MB_SKIP:
861  if(s->pict_type == AV_PICTURE_TYPE_P){
862  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
863  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
864  break;
865  }
866  case RV34_MB_B_DIRECT:
867  //surprisingly, it uses motion scheme from next reference frame
868  /* wait for the current mb row to be finished */
869  if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
871 
872  next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
873  if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
874  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
875  ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
876  }else
877  for(j = 0; j < 2; j++)
878  for(i = 0; i < 2; i++)
879  for(k = 0; k < 2; k++)
880  for(l = 0; l < 2; l++)
881  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]);
882  if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
883  rv34_mc_2mv(r, block_type);
884  else
885  rv34_mc_2mv_skip(r);
886  ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
887  break;
888  case RV34_MB_P_16x16:
889  case RV34_MB_P_MIX16x16:
890  rv34_pred_mv(r, block_type, 0, 0);
891  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
892  break;
893  case RV34_MB_B_FORWARD:
894  case RV34_MB_B_BACKWARD:
895  r->dmv[1][0] = r->dmv[0][0];
896  r->dmv[1][1] = r->dmv[0][1];
897  if(r->rv30)
898  rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
899  else
900  rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
901  rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
902  break;
903  case RV34_MB_P_16x8:
904  case RV34_MB_P_8x16:
905  rv34_pred_mv(r, block_type, 0, 0);
906  rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
907  if(block_type == RV34_MB_P_16x8){
908  rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
909  rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
910  }
911  if(block_type == RV34_MB_P_8x16){
912  rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
913  rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
914  }
915  break;
916  case RV34_MB_B_BIDIR:
917  rv34_pred_mv_b (r, block_type, 0);
918  rv34_pred_mv_b (r, block_type, 1);
919  rv34_mc_2mv (r, block_type);
920  break;
921  case RV34_MB_P_8x8:
922  for(i=0;i< 4;i++){
923  rv34_pred_mv(r, block_type, i, i);
924  rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
925  }
926  break;
927  }
928 
929  return 0;
930 }
931 /** @} */ // mv group
932 
933 /**
934  * @name Macroblock reconstruction functions
935  * @{
936  */
937 /** mapping of RV30/40 intra prediction types to standard H.264 types */
938 static const int ittrans[9] = {
941 };
942 
943 /** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
944 static const int ittrans16[4] = {
946 };
947 
948 /**
949  * Perform 4x4 intra prediction.
950  */
951 static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
952 {
953  uint8_t *prev = dst - stride + 4;
954  uint32_t topleft;
955 
956  if(!up && !left)
957  itype = DC_128_PRED;
958  else if(!up){
959  if(itype == VERT_PRED) itype = HOR_PRED;
960  if(itype == DC_PRED) itype = LEFT_DC_PRED;
961  }else if(!left){
962  if(itype == HOR_PRED) itype = VERT_PRED;
963  if(itype == DC_PRED) itype = TOP_DC_PRED;
965  }
966  if(!down){
968  if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
969  if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
970  }
971  if(!right && up){
972  topleft = dst[-stride + 3] * 0x01010101u;
973  prev = (uint8_t*)&topleft;
974  }
975  r->h.pred4x4[itype](dst, prev, stride);
976 }
977 
978 static inline int adjust_pred16(int itype, int up, int left)
979 {
980  if(!up && !left)
981  itype = DC_128_PRED8x8;
982  else if(!up){
983  if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
984  if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
985  if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
986  }else if(!left){
987  if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
988  if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
989  if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
990  }
991  return itype;
992 }
993 
994 static inline void rv34_process_block(RV34DecContext *r,
995  uint8_t *pdst, int stride,
996  int fc, int sc, int q_dc, int q_ac)
997 {
998  MpegEncContext *s = &r->s;
999  int16_t *ptr = s->block[0];
1000  int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
1001  fc, sc, q_dc, q_ac, q_ac);
1002  if(has_ac){
1003  r->rdsp.rv34_idct_add(pdst, stride, ptr);
1004  }else{
1005  r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1006  ptr[0] = 0;
1007  }
1008 }
1009 
1010 static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1011 {
1012  LOCAL_ALIGNED_16(int16_t, block16, [16]);
1013  MpegEncContext *s = &r->s;
1014  GetBitContext *gb = &s->gb;
1015  int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1016  q_ac = rv34_qscale_tab[s->qscale];
1017  uint8_t *dst = s->dest[0];
1018  int16_t *ptr = s->block[0];
1019  int i, j, itype, has_ac;
1020 
1021  memset(block16, 0, 16 * sizeof(*block16));
1022 
1023  has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1024  if(has_ac)
1025  r->rdsp.rv34_inv_transform(block16);
1026  else
1027  r->rdsp.rv34_inv_transform_dc(block16);
1028 
1029  itype = ittrans16[intra_types[0]];
1030  itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1031  r->h.pred16x16[itype](dst, s->linesize);
1032 
1033  for(j = 0; j < 4; j++){
1034  for(i = 0; i < 4; i++, cbp >>= 1){
1035  int dc = block16[i + j*4];
1036 
1037  if(cbp & 1){
1038  has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1039  }else
1040  has_ac = 0;
1041 
1042  if(has_ac){
1043  ptr[0] = dc;
1044  r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1045  }else
1046  r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1047  }
1048 
1049  dst += 4*s->linesize;
1050  }
1051 
1052  itype = ittrans16[intra_types[0]];
1053  if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1054  itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1055 
1056  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1057  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1058 
1059  for(j = 1; j < 3; j++){
1060  dst = s->dest[j];
1061  r->h.pred8x8[itype](dst, s->uvlinesize);
1062  for(i = 0; i < 4; i++, cbp >>= 1){
1063  uint8_t *pdst;
1064  if(!(cbp & 1)) continue;
1065  pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1066 
1067  rv34_process_block(r, pdst, s->uvlinesize,
1068  r->chroma_vlc, 1, q_dc, q_ac);
1069  }
1070  }
1071 }
1072 
1073 static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1074 {
1075  MpegEncContext *s = &r->s;
1076  uint8_t *dst = s->dest[0];
1077  int avail[6*8] = {0};
1078  int i, j, k;
1079  int idx, q_ac, q_dc;
1080 
1081  // Set neighbour information.
1082  if(r->avail_cache[1])
1083  avail[0] = 1;
1084  if(r->avail_cache[2])
1085  avail[1] = avail[2] = 1;
1086  if(r->avail_cache[3])
1087  avail[3] = avail[4] = 1;
1088  if(r->avail_cache[4])
1089  avail[5] = 1;
1090  if(r->avail_cache[5])
1091  avail[8] = avail[16] = 1;
1092  if(r->avail_cache[9])
1093  avail[24] = avail[32] = 1;
1094 
1095  q_ac = rv34_qscale_tab[s->qscale];
1096  for(j = 0; j < 4; j++){
1097  idx = 9 + j*8;
1098  for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1099  rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1100  avail[idx] = 1;
1101  if(!(cbp & 1)) continue;
1102 
1103  rv34_process_block(r, dst, s->linesize,
1104  r->luma_vlc, 0, q_ac, q_ac);
1105  }
1106  dst += s->linesize * 4 - 4*4;
1107  intra_types += r->intra_types_stride;
1108  }
1109 
1110  intra_types -= r->intra_types_stride * 4;
1111 
1112  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1113  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1114 
1115  for(k = 0; k < 2; k++){
1116  dst = s->dest[1+k];
1117  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1118 
1119  for(j = 0; j < 2; j++){
1120  int* acache = r->avail_cache + 6 + j*4;
1121  for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1122  int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1123  rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1124  acache[0] = 1;
1125 
1126  if(!(cbp&1)) continue;
1127 
1128  rv34_process_block(r, dst + 4*i, s->uvlinesize,
1129  r->chroma_vlc, 1, q_dc, q_ac);
1130  }
1131 
1132  dst += 4*s->uvlinesize;
1133  }
1134  }
1135 }
1136 
1137 static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1138 {
1139  int d;
1140  d = motion_val[0][0] - motion_val[-step][0];
1141  if(d < -3 || d > 3)
1142  return 1;
1143  d = motion_val[0][1] - motion_val[-step][1];
1144  if(d < -3 || d > 3)
1145  return 1;
1146  return 0;
1147 }
1148 
1150 {
1151  MpegEncContext *s = &r->s;
1152  int hmvmask = 0, vmvmask = 0, i, j;
1153  int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1154  int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
1155  for(j = 0; j < 16; j += 8){
1156  for(i = 0; i < 2; i++){
1157  if(is_mv_diff_gt_3(motion_val + i, 1))
1158  vmvmask |= 0x11 << (j + i*2);
1159  if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1160  hmvmask |= 0x03 << (j + i*2);
1161  }
1162  motion_val += s->b8_stride;
1163  }
1164  if(s->first_slice_line)
1165  hmvmask &= ~0x000F;
1166  if(!s->mb_x)
1167  vmvmask &= ~0x1111;
1168  if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1169  vmvmask |= (vmvmask & 0x4444) >> 1;
1170  hmvmask |= (hmvmask & 0x0F00) >> 4;
1171  if(s->mb_x)
1172  r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1173  if(!s->first_slice_line)
1174  r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1175  }
1176  return hmvmask | vmvmask;
1177 }
1178 
1179 static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1180 {
1181  MpegEncContext *s = &r->s;
1182  GetBitContext *gb = &s->gb;
1183  uint8_t *dst = s->dest[0];
1184  int16_t *ptr = s->block[0];
1185  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1186  int cbp, cbp2;
1187  int q_dc, q_ac, has_ac;
1188  int i, j;
1189  int dist;
1190 
1191  // Calculate which neighbours are available. Maybe it's worth optimizing too.
1192  memset(r->avail_cache, 0, sizeof(r->avail_cache));
1193  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1194  dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1195  if(s->mb_x && dist)
1196  r->avail_cache[5] =
1197  r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1198  if(dist >= s->mb_width)
1199  r->avail_cache[2] =
1200  r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1201  if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1202  r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1203  if(s->mb_x && dist > s->mb_width)
1204  r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1205 
1206  s->qscale = r->si.quant;
1207  cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1208  r->cbp_luma [mb_pos] = cbp;
1209  r->cbp_chroma[mb_pos] = cbp >> 16;
1210  r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1211  s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1212 
1213  if(cbp == -1)
1214  return -1;
1215 
1216  if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
1217  if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1218  else rv34_output_intra(r, intra_types, cbp);
1219  return 0;
1220  }
1221 
1222  if(r->is16){
1223  // Only for RV34_MB_P_MIX16x16
1224  LOCAL_ALIGNED_16(int16_t, block16, [16]);
1225  memset(block16, 0, 16 * sizeof(*block16));
1226  q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1227  q_ac = rv34_qscale_tab[s->qscale];
1228  if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1229  r->rdsp.rv34_inv_transform(block16);
1230  else
1231  r->rdsp.rv34_inv_transform_dc(block16);
1232 
1233  q_ac = rv34_qscale_tab[s->qscale];
1234 
1235  for(j = 0; j < 4; j++){
1236  for(i = 0; i < 4; i++, cbp >>= 1){
1237  int dc = block16[i + j*4];
1238 
1239  if(cbp & 1){
1240  has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1241  }else
1242  has_ac = 0;
1243 
1244  if(has_ac){
1245  ptr[0] = dc;
1246  r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1247  }else
1248  r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1249  }
1250 
1251  dst += 4*s->linesize;
1252  }
1253 
1254  r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1255  }else{
1256  q_ac = rv34_qscale_tab[s->qscale];
1257 
1258  for(j = 0; j < 4; j++){
1259  for(i = 0; i < 4; i++, cbp >>= 1){
1260  if(!(cbp & 1)) continue;
1261 
1262  rv34_process_block(r, dst + 4*i, s->linesize,
1263  r->luma_vlc, 0, q_ac, q_ac);
1264  }
1265  dst += 4*s->linesize;
1266  }
1267  }
1268 
1269  q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1270  q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1271 
1272  for(j = 1; j < 3; j++){
1273  dst = s->dest[j];
1274  for(i = 0; i < 4; i++, cbp >>= 1){
1275  uint8_t *pdst;
1276  if(!(cbp & 1)) continue;
1277  pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1278 
1279  rv34_process_block(r, pdst, s->uvlinesize,
1280  r->chroma_vlc, 1, q_dc, q_ac);
1281  }
1282  }
1283 
1284  return 0;
1285 }
1286 
1287 static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1288 {
1289  MpegEncContext *s = &r->s;
1290  int cbp, dist;
1291  int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1292 
1293  // Calculate which neighbours are available. Maybe it's worth optimizing too.
1294  memset(r->avail_cache, 0, sizeof(r->avail_cache));
1295  fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1296  dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1297  if(s->mb_x && dist)
1298  r->avail_cache[5] =
1299  r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1300  if(dist >= s->mb_width)
1301  r->avail_cache[2] =
1302  r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1303  if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1304  r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1305  if(s->mb_x && dist > s->mb_width)
1306  r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1307 
1308  s->qscale = r->si.quant;
1309  cbp = rv34_decode_intra_mb_header(r, intra_types);
1310  r->cbp_luma [mb_pos] = cbp;
1311  r->cbp_chroma[mb_pos] = cbp >> 16;
1312  r->deblock_coefs[mb_pos] = 0xFFFF;
1313  s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1314 
1315  if(cbp == -1)
1316  return -1;
1317 
1318  if(r->is16){
1319  rv34_output_i16x16(r, intra_types, cbp);
1320  return 0;
1321  }
1322 
1323  rv34_output_intra(r, intra_types, cbp);
1324  return 0;
1325 }
1326 
1328 {
1329  int bits;
1330  if(s->mb_y >= s->mb_height)
1331  return 1;
1332  if(!s->mb_num_left)
1333  return 1;
1334  if(r->s.mb_skip_run > 1)
1335  return 0;
1336  bits = get_bits_left(&s->gb);
1337  if(bits <= 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1338  return 1;
1339  return 0;
1340 }
1341 
1342 
1344 {
1346  r->intra_types = NULL;
1348  av_freep(&r->mb_type);
1349  av_freep(&r->cbp_luma);
1350  av_freep(&r->cbp_chroma);
1351  av_freep(&r->deblock_coefs);
1352 }
1353 
1354 
1356 {
1357  r->intra_types_stride = r->s.mb_width * 4 + 4;
1358 
1359  r->cbp_chroma = av_malloc(r->s.mb_stride * r->s.mb_height *
1360  sizeof(*r->cbp_chroma));
1361  r->cbp_luma = av_malloc(r->s.mb_stride * r->s.mb_height *
1362  sizeof(*r->cbp_luma));
1363  r->deblock_coefs = av_malloc(r->s.mb_stride * r->s.mb_height *
1364  sizeof(*r->deblock_coefs));
1366  sizeof(*r->intra_types_hist));
1367  r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1368  sizeof(*r->mb_type));
1369 
1370  if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1371  r->intra_types_hist && r->mb_type)) {
1372  rv34_decoder_free(r);
1373  return AVERROR(ENOMEM);
1374  }
1375 
1377 
1378  return 0;
1379 }
1380 
1381 
1383 {
1384  rv34_decoder_free(r);
1385  return rv34_decoder_alloc(r);
1386 }
1387 
1388 
1389 static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1390 {
1391  MpegEncContext *s = &r->s;
1392  GetBitContext *gb = &s->gb;
1393  int mb_pos, slice_type;
1394  int res;
1395 
1396  init_get_bits(&r->s.gb, buf, buf_size*8);
1397  res = r->parse_slice_header(r, gb, &r->si);
1398  if(res < 0){
1399  av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1400  return -1;
1401  }
1402 
1403  slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1404  if (slice_type != s->pict_type) {
1405  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1406  return AVERROR_INVALIDDATA;
1407  }
1408  if (s->width != r->si.width || s->height != r->si.height) {
1409  av_log(s->avctx, AV_LOG_ERROR, "Size mismatch\n");
1410  return AVERROR_INVALIDDATA;
1411  }
1412 
1413  r->si.end = end;
1414  s->qscale = r->si.quant;
1415  s->mb_num_left = r->si.end - r->si.start;
1416  r->s.mb_skip_run = 0;
1417 
1418  mb_pos = s->mb_x + s->mb_y * s->mb_width;
1419  if(r->si.start != mb_pos){
1420  av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1421  s->mb_x = r->si.start % s->mb_width;
1422  s->mb_y = r->si.start / s->mb_width;
1423  }
1424  memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1425  s->first_slice_line = 1;
1426  s->resync_mb_x = s->mb_x;
1427  s->resync_mb_y = s->mb_y;
1428 
1430  while(!check_slice_end(r, s)) {
1432 
1433  if(r->si.type)
1434  res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1435  else
1436  res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1437  if(res < 0){
1438  ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1439  return -1;
1440  }
1441  if (++s->mb_x == s->mb_width) {
1442  s->mb_x = 0;
1443  s->mb_y++;
1445 
1446  memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1447  memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1448 
1449  if(r->loop_filter && s->mb_y >= 2)
1450  r->loop_filter(r, s->mb_y - 2);
1451 
1452  if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1454  s->mb_y - 2, 0);
1455 
1456  }
1457  if(s->mb_x == s->resync_mb_x)
1458  s->first_slice_line=0;
1459  s->mb_num_left--;
1460  }
1461  ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1462 
1463  return s->mb_y == s->mb_height;
1464 }
1465 
1466 /** @} */ // recons group end
1467 
1468 /**
1469  * Initialize decoder.
1470  */
1472 {
1473  RV34DecContext *r = avctx->priv_data;
1474  MpegEncContext *s = &r->s;
1475  int ret;
1476 
1478  s->avctx = avctx;
1479  s->out_format = FMT_H263;
1480  s->codec_id = avctx->codec_id;
1481 
1482  s->width = avctx->width;
1483  s->height = avctx->height;
1484 
1485  r->s.avctx = avctx;
1486  avctx->flags |= CODEC_FLAG_EMU_EDGE;
1487  r->s.flags |= CODEC_FLAG_EMU_EDGE;
1488  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1489  avctx->has_b_frames = 1;
1490  s->low_delay = 0;
1491 
1492  if ((ret = ff_MPV_common_init(s)) < 0)
1493  return ret;
1494 
1495  ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1496 
1497 #if CONFIG_RV30_DECODER
1498  if (avctx->codec_id == AV_CODEC_ID_RV30)
1499  ff_rv30dsp_init(&r->rdsp);
1500 #endif
1501 #if CONFIG_RV40_DECODER
1502  if (avctx->codec_id == AV_CODEC_ID_RV40)
1503  ff_rv40dsp_init(&r->rdsp);
1504 #endif
1505 
1506  if ((ret = rv34_decoder_alloc(r)) < 0) {
1507  ff_MPV_common_end(&r->s);
1508  return ret;
1509  }
1510 
1511  if(!intra_vlcs[0].cbppattern[0].bits)
1512  rv34_init_tables();
1513 
1514  avctx->internal->allocate_progress = 1;
1515 
1516  return 0;
1517 }
1518 
1520 {
1521  int err;
1522  RV34DecContext *r = avctx->priv_data;
1523 
1524  r->s.avctx = avctx;
1525 
1526  if (avctx->internal->is_copy) {
1527  r->tmp_b_block_base = NULL;
1528  if ((err = ff_MPV_common_init(&r->s)) < 0)
1529  return err;
1530  if ((err = rv34_decoder_alloc(r)) < 0) {
1531  ff_MPV_common_end(&r->s);
1532  return err;
1533  }
1534  }
1535 
1536  return 0;
1537 }
1538 
1540 {
1541  RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1542  MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1543  int err;
1544 
1545  if (dst == src || !s1->context_initialized)
1546  return 0;
1547 
1548  if (s->height != s1->height || s->width != s1->width) {
1549  s->height = s1->height;
1550  s->width = s1->width;
1551  if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1552  return err;
1553  if ((err = rv34_decoder_realloc(r)) < 0)
1554  return err;
1555  }
1556 
1557  if ((err = ff_mpeg_update_thread_context(dst, src)))
1558  return err;
1559 
1560  r->cur_pts = r1->cur_pts;
1561  r->last_pts = r1->last_pts;
1562  r->next_pts = r1->next_pts;
1563 
1564  memset(&r->si, 0, sizeof(r->si));
1565 
1566  return 0;
1567 }
1568 
1569 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
1570 {
1571  if(avctx->slice_count) return avctx->slice_offset[n];
1572  else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1573 }
1574 
1575 static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1576 {
1577  RV34DecContext *r = avctx->priv_data;
1578  MpegEncContext *s = &r->s;
1579  int got_picture = 0, ret;
1580 
1581  ff_er_frame_end(&s->er);
1582  ff_MPV_frame_end(s);
1583  s->mb_num_left = 0;
1584 
1585  if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1587 
1588  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1589  if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
1590  return ret;
1593  got_picture = 1;
1594  } else if (s->last_picture_ptr != NULL) {
1595  if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
1596  return ret;
1599  got_picture = 1;
1600  }
1601 
1602  return got_picture;
1603 }
1604 
1605 static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, int new_h)
1606 {
1607  // attempt to keep aspect during typical resolution switches
1608  if (!sar.num)
1609  sar = (AVRational){1, 1};
1610 
1611  sar = av_mul_q(sar, (AVRational){new_h * old_w, new_w * old_h});
1612  return sar;
1613 }
1614 
1616  void *data, int *got_picture_ptr,
1617  AVPacket *avpkt)
1618 {
1619  const uint8_t *buf = avpkt->data;
1620  int buf_size = avpkt->size;
1621  RV34DecContext *r = avctx->priv_data;
1622  MpegEncContext *s = &r->s;
1623  AVFrame *pict = data;
1624  SliceInfo si;
1625  int i, ret;
1626  int slice_count;
1627  const uint8_t *slices_hdr = NULL;
1628  int last = 0;
1629 
1630  /* no supplementary picture */
1631  if (buf_size == 0) {
1632  /* special case for last picture */
1633  if (s->low_delay==0 && s->next_picture_ptr) {
1634  if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)
1635  return ret;
1636  s->next_picture_ptr = NULL;
1637 
1638  *got_picture_ptr = 1;
1639  }
1640  return 0;
1641  }
1642 
1643  if(!avctx->slice_count){
1644  slice_count = (*buf++) + 1;
1645  slices_hdr = buf + 4;
1646  buf += 8 * slice_count;
1647  buf_size -= 1 + 8 * slice_count;
1648  }else
1649  slice_count = avctx->slice_count;
1650 
1651  //parse first slice header to check whether this frame can be decoded
1652  if(get_slice_offset(avctx, slices_hdr, 0) < 0 ||
1653  get_slice_offset(avctx, slices_hdr, 0) > buf_size){
1654  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1655  return AVERROR_INVALIDDATA;
1656  }
1657  init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), (buf_size-get_slice_offset(avctx, slices_hdr, 0))*8);
1658  if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
1659  av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
1660  return AVERROR_INVALIDDATA;
1661  }
1662  if ((!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) &&
1663  si.type == AV_PICTURE_TYPE_B) {
1664  av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
1665  "reference data.\n");
1666  return AVERROR_INVALIDDATA;
1667  }
1668  if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
1669  || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
1670  || avctx->skip_frame >= AVDISCARD_ALL)
1671  return avpkt->size;
1672 
1673  /* first slice */
1674  if (si.start == 0) {
1675  if (s->mb_num_left > 0) {
1676  av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
1677  s->mb_num_left);
1678  ff_er_frame_end(&s->er);
1679  ff_MPV_frame_end(s);
1680  }
1681 
1682  if (s->width != si.width || s->height != si.height) {
1683  int err;
1684 
1685  av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1686  si.width, si.height);
1687 
1688  if (av_image_check_size(si.width, si.height, 0, s->avctx))
1689  return AVERROR_INVALIDDATA;
1690 
1692  s->width, s->height, s->avctx->sample_aspect_ratio,
1693  si.width, si.height);
1694  s->width = si.width;
1695  s->height = si.height;
1697  if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1698  return err;
1699  if ((err = rv34_decoder_realloc(r)) < 0)
1700  return err;
1701  }
1702  s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1703  if (ff_MPV_frame_start(s, s->avctx) < 0)
1704  return -1;
1706  if (!r->tmp_b_block_base) {
1707  int i;
1708 
1709  r->tmp_b_block_base = av_malloc(s->linesize * 48);
1710  for (i = 0; i < 2; i++)
1711  r->tmp_b_block_y[i] = r->tmp_b_block_base
1712  + i * 16 * s->linesize;
1713  for (i = 0; i < 4; i++)
1714  r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1715  + (i >> 1) * 8 * s->uvlinesize
1716  + (i & 1) * 16;
1717  }
1718  r->cur_pts = si.pts;
1719  if (s->pict_type != AV_PICTURE_TYPE_B) {
1720  r->last_pts = r->next_pts;
1721  r->next_pts = r->cur_pts;
1722  } else {
1723  int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1724  int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1725  int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1726 
1727  if(!refdist){
1728  r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1729  r->scaled_weight = 0;
1730  }else{
1731  r->mv_weight1 = (dist0 << 14) / refdist;
1732  r->mv_weight2 = (dist1 << 14) / refdist;
1733  if((r->mv_weight1|r->mv_weight2) & 511){
1734  r->weight1 = r->mv_weight1;
1735  r->weight2 = r->mv_weight2;
1736  r->scaled_weight = 0;
1737  }else{
1738  r->weight1 = r->mv_weight1 >> 9;
1739  r->weight2 = r->mv_weight2 >> 9;
1740  r->scaled_weight = 1;
1741  }
1742  }
1743  }
1744  s->mb_x = s->mb_y = 0;
1746  } else if (HAVE_THREADS &&
1748  av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1749  "multithreading mode (start MB is %d).\n", si.start);
1750  return AVERROR_INVALIDDATA;
1751  }
1752 
1753  for(i = 0; i < slice_count; i++){
1754  int offset = get_slice_offset(avctx, slices_hdr, i);
1755  int size;
1756  if(i+1 == slice_count)
1757  size = buf_size - offset;
1758  else
1759  size = get_slice_offset(avctx, slices_hdr, i+1) - offset;
1760 
1761  if(offset < 0 || offset > buf_size){
1762  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1763  break;
1764  }
1765 
1766  r->si.end = s->mb_width * s->mb_height;
1767  s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1768 
1769  if(i+1 < slice_count){
1770  if (get_slice_offset(avctx, slices_hdr, i+1) < 0 ||
1771  get_slice_offset(avctx, slices_hdr, i+1) > buf_size) {
1772  av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1773  break;
1774  }
1775  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);
1776  if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1777  if(i+2 < slice_count)
1778  size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1779  else
1780  size = buf_size - offset;
1781  }else
1782  r->si.end = si.start;
1783  }
1784  if (size < 0 || size > buf_size - offset) {
1785  av_log(avctx, AV_LOG_ERROR, "Slice size is invalid\n");
1786  break;
1787  }
1788  last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1789  if(last)
1790  break;
1791  }
1792 
1793  if (s->current_picture_ptr) {
1794  if (last) {
1795  if(r->loop_filter)
1796  r->loop_filter(r, s->mb_height - 1);
1797 
1798  ret = finish_frame(avctx, pict);
1799  if (ret < 0)
1800  return ret;
1801  *got_picture_ptr = ret;
1802  } else if (HAVE_THREADS &&
1804  av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1805  /* always mark the current frame as finished, frame-mt supports
1806  * only complete frames */
1807  ff_er_frame_end(&s->er);
1808  ff_MPV_frame_end(s);
1809  s->mb_num_left = 0;
1811  return AVERROR_INVALIDDATA;
1812  }
1813  }
1814 
1815  return avpkt->size;
1816 }
1817 
1819 {
1820  RV34DecContext *r = avctx->priv_data;
1821 
1822  ff_MPV_common_end(&r->s);
1823  rv34_decoder_free(r);
1824 
1825  return 0;
1826 }