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/avassert.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/mem_internal.h"
31 #include "libavutil/thread.h"
32 #include "libavutil/video_enc_params.h"
33
34 #include "avcodec.h"
35 #include "error_resilience.h"
36 #include "mpegutils.h"
37 #include "mpegvideo.h"
38 #include "mpegvideodec.h"
39 #include "golomb.h"
40 #include "internal.h"
41 #include "mathops.h"
42 #include "mpeg_er.h"
43 #include "qpeldsp.h"
44 #include "rectangle.h"
45 #include "thread.h"
46 #include "threadframe.h"
47
48 #include "rv34vlc.h"
49 #include "rv34data.h"
50 #include "rv34.h"
51
ZERO8x2(void * dst,int stride)52 static inline void ZERO8x2(void* dst, int stride)
53 {
54 fill_rectangle(dst, 1, 2, stride, 0, 4);
55 fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
56 }
57
58 /** translation of RV30/40 macroblock types to lavc ones */
59 static const int rv34_mb_type_to_lavc[12] = {
60 MB_TYPE_INTRA,
61 MB_TYPE_INTRA16x16 | MB_TYPE_SEPARATE_DC,
62 MB_TYPE_16x16 | MB_TYPE_L0,
63 MB_TYPE_8x8 | MB_TYPE_L0,
64 MB_TYPE_16x16 | MB_TYPE_L0,
65 MB_TYPE_16x16 | MB_TYPE_L1,
66 MB_TYPE_SKIP,
67 MB_TYPE_DIRECT2 | MB_TYPE_16x16,
68 MB_TYPE_16x8 | MB_TYPE_L0,
69 MB_TYPE_8x16 | MB_TYPE_L0,
70 MB_TYPE_16x16 | MB_TYPE_L0L1,
71 MB_TYPE_16x16 | MB_TYPE_L0 | MB_TYPE_SEPARATE_DC
72 };
73
74
75 static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
76
77 static int rv34_decode_mv(RV34DecContext *r, int block_type);
78
79 /**
80 * @name RV30/40 VLC generating functions
81 * @{
82 */
83
84 static VLCElem table_data[117592];
85
86 /**
87 * Generate VLC from codeword lengths.
88 * @param bits codeword lengths (zeroes are accepted)
89 * @param size length of input data
90 * @param vlc output VLC
91 * @param insyms symbols for input codes (NULL for default ones)
92 * @param num VLC table number (for static initialization)
93 */
rv34_gen_vlc(const uint8_t * bits,int size,VLC * vlc,const uint8_t * syms,int * offset)94 static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *syms,
95 int *offset)
96 {
97 int counts[17] = {0}, codes[17];
98 uint16_t cw[MAX_VLC_SIZE];
99 int maxbits;
100
101 for (int i = 0; i < size; i++)
102 counts[bits[i]]++;
103
104 /* bits[0] is zero for some tables, i.e. syms actually starts at 1.
105 * So we reset it here. The code assigned to this element is 0x00. */
106 codes[0] = counts[0] = 0;
107 for (int i = 0; i < 16; i++) {
108 codes[i+1] = (codes[i] + counts[i]) << 1;
109 if (counts[i])
110 maxbits = i;
111 }
112 for (int i = 0; i < size; i++)
113 cw[i] = codes[bits[i]]++;
114
115 vlc->table = &table_data[*offset];
116 vlc->table_allocated = FF_ARRAY_ELEMS(table_data) - *offset;
117 ff_init_vlc_sparse(vlc, FFMIN(maxbits, 9), size,
118 bits, 1, 1,
119 cw, 2, 2,
120 syms, !!syms, !!syms, INIT_VLC_STATIC_OVERLONG);
121 *offset += vlc->table_size;
122 }
123
124 /**
125 * Initialize all tables.
126 */
rv34_init_tables(void)127 static av_cold void rv34_init_tables(void)
128 {
129 int i, j, k, offset = 0;
130
131 for(i = 0; i < NUM_INTRA_TABLES; i++){
132 for(j = 0; j < 2; j++){
133 rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE,
134 &intra_vlcs[i].cbppattern[j], NULL, &offset);
135 rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE,
136 &intra_vlcs[i].second_pattern[j], NULL, &offset);
137 rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE,
138 &intra_vlcs[i].third_pattern[j], NULL, &offset);
139 for(k = 0; k < 4; k++){
140 rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2], CBP_VLC_SIZE,
141 &intra_vlcs[i].cbp[j][k], rv34_cbp_code, &offset);
142 }
143 }
144 for(j = 0; j < 4; j++){
145 rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE,
146 &intra_vlcs[i].first_pattern[j], NULL, &offset);
147 }
148 rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE,
149 &intra_vlcs[i].coefficient, NULL, &offset);
150 }
151
152 for(i = 0; i < NUM_INTER_TABLES; i++){
153 rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE,
154 &inter_vlcs[i].cbppattern[0], NULL, &offset);
155 for(j = 0; j < 4; j++){
156 rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE,
157 &inter_vlcs[i].cbp[0][j], rv34_cbp_code, &offset);
158 }
159 for(j = 0; j < 2; j++){
160 rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE,
161 &inter_vlcs[i].first_pattern[j], NULL, &offset);
162 rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE,
163 &inter_vlcs[i].second_pattern[j], NULL, &offset);
164 rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE,
165 &inter_vlcs[i].third_pattern[j], NULL, &offset);
166 }
167 rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE,
168 &inter_vlcs[i].coefficient, NULL, &offset);
169 }
170 }
171
172 /** @} */ // vlc group
173
174 /**
175 * @name RV30/40 4x4 block decoding functions
176 * @{
177 */
178
179 /**
180 * Decode coded block pattern.
181 */
rv34_decode_cbp(GetBitContext * gb,RV34VLC * vlc,int table)182 static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
183 {
184 int pattern, code, cbp=0;
185 int ones;
186 static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
187 static const int shifts[4] = { 0, 2, 8, 10 };
188 const int *curshift = shifts;
189 int i, t, mask;
190
191 code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
192 pattern = code & 0xF;
193 code >>= 4;
194
195 ones = rv34_count_ones[pattern];
196
197 for(mask = 8; mask; mask >>= 1, curshift++){
198 if(pattern & mask)
199 cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
200 }
201
202 for(i = 0; i < 4; i++){
203 t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
204 if(t == 1)
205 cbp |= cbp_masks[get_bits1(gb)] << i;
206 if(t == 2)
207 cbp |= cbp_masks[2] << i;
208 }
209 return cbp;
210 }
211
212 /**
213 * Get one coefficient value from the bitstream and store it.
214 */
decode_coeff(int16_t * dst,int coef,int esc,GetBitContext * gb,VLC * vlc,int q)215 static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
216 {
217 if(coef){
218 if(coef == esc){
219 coef = get_vlc2(gb, vlc->table, 9, 2);
220 if(coef > 23){
221 coef -= 23;
222 coef = 22 + ((1 << coef) | get_bits(gb, coef));
223 }
224 coef += esc;
225 }
226 if(get_bits1(gb))
227 coef = -coef;
228 *dst = (coef*q + 8) >> 4;
229 }
230 }
231
232 /**
233 * Decode 2x2 subblock of coefficients.
234 */
decode_subblock(int16_t * dst,int code,const int is_block2,GetBitContext * gb,VLC * vlc,int q)235 static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
236 {
237 int flags = modulo_three_table[code];
238
239 decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
240 if(is_block2){
241 decode_coeff(dst+1*4+0, (flags >> 4) & 3, 2, gb, vlc, q);
242 decode_coeff(dst+0*4+1, (flags >> 2) & 3, 2, gb, vlc, q);
243 }else{
244 decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q);
245 decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q);
246 }
247 decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
248 }
249
250 /**
251 * Decode a single coefficient.
252 */
decode_subblock1(int16_t * dst,int code,GetBitContext * gb,VLC * vlc,int q)253 static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
254 {
255 int coeff = modulo_three_table[code] >> 6;
256 decode_coeff(dst, coeff, 3, gb, vlc, q);
257 }
258
decode_subblock3(int16_t * dst,int code,GetBitContext * gb,VLC * vlc,int q_dc,int q_ac1,int q_ac2)259 static inline void decode_subblock3(int16_t *dst, int code, GetBitContext *gb, VLC *vlc,
260 int q_dc, int q_ac1, int q_ac2)
261 {
262 int flags = modulo_three_table[code];
263
264 decode_coeff(dst+0*4+0, (flags >> 6) , 3, gb, vlc, q_dc);
265 decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
266 decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
267 decode_coeff(dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
268 }
269
270 /**
271 * Decode coefficients for 4x4 block.
272 *
273 * This is done by filling 2x2 subblocks with decoded coefficients
274 * in this order (the same for subblocks and subblock coefficients):
275 * o--o
276 * /
277 * /
278 * o--o
279 */
280
rv34_decode_block(int16_t * dst,GetBitContext * gb,RV34VLC * rvlc,int fc,int sc,int q_dc,int q_ac1,int q_ac2)281 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)
282 {
283 int code, pattern, has_ac = 1;
284
285 code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
286
287 pattern = code & 0x7;
288
289 code >>= 3;
290
291 if (modulo_three_table[code] & 0x3F) {
292 decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
293 } else {
294 decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
295 if (!pattern)
296 return 0;
297 has_ac = 0;
298 }
299
300 if(pattern & 4){
301 code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
302 decode_subblock(dst + 4*0+2, code, 0, gb, &rvlc->coefficient, q_ac2);
303 }
304 if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
305 code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
306 decode_subblock(dst + 4*2+0, code, 1, gb, &rvlc->coefficient, q_ac2);
307 }
308 if(pattern & 1){
309 code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
310 decode_subblock(dst + 4*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
311 }
312 return has_ac | pattern;
313 }
314
315 /**
316 * @name RV30/40 bitstream parsing
317 * @{
318 */
319
320 /**
321 * Decode starting slice position.
322 * @todo Maybe replace with ff_h263_decode_mba() ?
323 */
ff_rv34_get_start_offset(GetBitContext * gb,int mb_size)324 int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
325 {
326 int i;
327 for(i = 0; i < 5; i++)
328 if(rv34_mb_max_sizes[i] >= mb_size - 1)
329 break;
330 return rv34_mb_bits_sizes[i];
331 }
332
333 /**
334 * Select VLC set for decoding from current quantizer, modifier and frame type.
335 */
choose_vlc_set(int quant,int mod,int type)336 static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
337 {
338 if(mod == 2 && quant < 19) quant += 10;
339 else if(mod && quant < 26) quant += 5;
340 av_assert2(quant >= 0 && quant < 32);
341 return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][quant]]
342 : &intra_vlcs[rv34_quant_to_vlc_set[0][quant]];
343 }
344
345 /**
346 * Decode intra macroblock header and return CBP in case of success, -1 otherwise.
347 */
rv34_decode_intra_mb_header(RV34DecContext * r,int8_t * intra_types)348 static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
349 {
350 MpegEncContext *s = &r->s;
351 GetBitContext *gb = &s->gb;
352 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
353 int t;
354
355 r->is16 = get_bits1(gb);
356 if(r->is16){
357 s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA16x16;
358 r->block_type = RV34_MB_TYPE_INTRA16x16;
359 t = get_bits(gb, 2);
360 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
361 r->luma_vlc = 2;
362 }else{
363 if(!r->rv30){
364 if(!get_bits1(gb))
365 av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
366 }
367 s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA;
368 r->block_type = RV34_MB_TYPE_INTRA;
369 if(r->decode_intra_types(r, gb, intra_types) < 0)
370 return -1;
371 r->luma_vlc = 1;
372 }
373
374 r->chroma_vlc = 0;
375 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
376
377 return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
378 }
379
380 /**
381 * Decode inter macroblock header and return CBP in case of success, -1 otherwise.
382 */
rv34_decode_inter_mb_header(RV34DecContext * r,int8_t * intra_types)383 static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
384 {
385 MpegEncContext *s = &r->s;
386 GetBitContext *gb = &s->gb;
387 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
388 int i, t;
389
390 r->block_type = r->decode_mb_info(r);
391 if(r->block_type == -1)
392 return -1;
393 s->current_picture_ptr->mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type];
394 r->mb_type[mb_pos] = r->block_type;
395 if(r->block_type == RV34_MB_SKIP){
396 if(s->pict_type == AV_PICTURE_TYPE_P)
397 r->mb_type[mb_pos] = RV34_MB_P_16x16;
398 if(s->pict_type == AV_PICTURE_TYPE_B)
399 r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
400 }
401 r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
402 if (rv34_decode_mv(r, r->block_type) < 0)
403 return -1;
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
438 /** @} */ //bitstream functions
439
440 /**
441 * @name motion vector related code (prediction, reconstruction, motion compensation)
442 * @{
443 */
444
445 /** macroblock partition width in 8x8 blocks */
446 static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
447
448 /** macroblock partition height in 8x8 blocks */
449 static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
450
451 /** availability index for subblocks */
452 static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
453
454 /**
455 * motion vector prediction
456 *
457 * Motion prediction performed for the block by using median prediction of
458 * motion vectors from the left, top and right top blocks but in corner cases
459 * some other vectors may be used instead.
460 */
rv34_pred_mv(RV34DecContext * r,int block_type,int subblock_no,int dmv_no)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
512 /**
513 * Calculate motion vector component that should be added for direct blocks.
514 */
calc_add_mv(RV34DecContext * r,int dir,int val)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 (int)(val * (SUINT)mul + 0x2000) >> 14;
520 }
521
522 /**
523 * Predict motion vector for B-frame macroblock.
524 */
rv34_pred_b_vector(int A[2],int B[2],int C[2],int A_avail,int B_avail,int C_avail,int * mx,int * my)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
542 /**
543 * motion vector prediction for B-frames
544 */
rv34_pred_mv_b(RV34DecContext * r,int block_type,int dir)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
594 /**
595 * motion vector prediction - RV3 version
596 */
rv34_pred_mv_rv3(RV34DecContext * r,int block_type,int dir)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
645 /**
646 * generic motion compensation function
647 *
648 * @param r decoder context
649 * @param block_type type of the current block
650 * @param xoff horizontal offset from the start of the current block
651 * @param yoff vertical offset from the start of the current block
652 * @param mv_off offset to the motion vector information
653 * @param width width of the current partition in 8x8 blocks
654 * @param height height of the current partition in 8x8 blocks
655 * @param dir motion compensation direction (i.e. from the last or the next reference frame)
656 * @param thirdpel motion vectors are specified in 1/3 of pixel
657 * @param qpel_mc a set of functions used to perform luma motion compensation
658 * @param chroma_mc a set of functions used to perform chroma motion compensation
659 */
rv34_mc(RV34DecContext * r,const int block_type,const int xoff,const int yoff,int mv_off,const int width,const int height,int dir,const int thirdpel,int weighted,qpel_mc_func (* qpel_mc)[16],h264_chroma_mc_func (* chroma_mc))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],
665 h264_chroma_mc_func (*chroma_mc))
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 int emu = 0;
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 srcY -= 2 + 2*s->linesize;
725 s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcY,
726 s->linesize, s->linesize,
727 (width << 3) + 6, (height << 3) + 6,
728 src_x - 2, src_y - 2,
729 s->h_edge_pos, s->v_edge_pos);
730 srcY = s->sc.edge_emu_buffer + 2 + 2*s->linesize;
731 emu = 1;
732 }
733 if(!weighted){
734 Y = s->dest[0] + xoff + yoff *s->linesize;
735 U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
736 V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
737 }else{
738 Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
739 U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
740 V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
741 }
742
743 if(block_type == RV34_MB_P_16x8){
744 qpel_mc[1][dxy](Y, srcY, s->linesize);
745 Y += 8;
746 srcY += 8;
747 }else if(block_type == RV34_MB_P_8x16){
748 qpel_mc[1][dxy](Y, srcY, s->linesize);
749 Y += 8 * s->linesize;
750 srcY += 8 * s->linesize;
751 }
752 is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
753 qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
754 if (emu) {
755 uint8_t *uvbuf = s->sc.edge_emu_buffer;
756
757 s->vdsp.emulated_edge_mc(uvbuf, srcU,
758 s->uvlinesize, s->uvlinesize,
759 (width << 2) + 1, (height << 2) + 1,
760 uvsrc_x, uvsrc_y,
761 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
762 srcU = uvbuf;
763 uvbuf += 9*s->uvlinesize;
764
765 s->vdsp.emulated_edge_mc(uvbuf, srcV,
766 s->uvlinesize, s->uvlinesize,
767 (width << 2) + 1, (height << 2) + 1,
768 uvsrc_x, uvsrc_y,
769 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
770 srcV = uvbuf;
771 }
772 chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
773 chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
774 }
775
rv34_mc_1mv(RV34DecContext * r,const int block_type,const int xoff,const int yoff,int mv_off,const int width,const int height,int dir)776 static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
777 const int xoff, const int yoff, int mv_off,
778 const int width, const int height, int dir)
779 {
780 rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
781 r->rdsp.put_pixels_tab,
782 r->rdsp.put_chroma_pixels_tab);
783 }
784
rv4_weight(RV34DecContext * r)785 static void rv4_weight(RV34DecContext *r)
786 {
787 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][0](r->s.dest[0],
788 r->tmp_b_block_y[0],
789 r->tmp_b_block_y[1],
790 r->weight1,
791 r->weight2,
792 r->s.linesize);
793 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[1],
794 r->tmp_b_block_uv[0],
795 r->tmp_b_block_uv[2],
796 r->weight1,
797 r->weight2,
798 r->s.uvlinesize);
799 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[2],
800 r->tmp_b_block_uv[1],
801 r->tmp_b_block_uv[3],
802 r->weight1,
803 r->weight2,
804 r->s.uvlinesize);
805 }
806
rv34_mc_2mv(RV34DecContext * r,const int block_type)807 static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
808 {
809 int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
810
811 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
812 r->rdsp.put_pixels_tab,
813 r->rdsp.put_chroma_pixels_tab);
814 if(!weighted){
815 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
816 r->rdsp.avg_pixels_tab,
817 r->rdsp.avg_chroma_pixels_tab);
818 }else{
819 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
820 r->rdsp.put_pixels_tab,
821 r->rdsp.put_chroma_pixels_tab);
822 rv4_weight(r);
823 }
824 }
825
rv34_mc_2mv_skip(RV34DecContext * r)826 static void rv34_mc_2mv_skip(RV34DecContext *r)
827 {
828 int i, j;
829 int weighted = !r->rv30 && r->weight1 != 8192;
830
831 for(j = 0; j < 2; j++)
832 for(i = 0; i < 2; i++){
833 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
834 weighted,
835 r->rdsp.put_pixels_tab,
836 r->rdsp.put_chroma_pixels_tab);
837 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
838 weighted,
839 weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
840 weighted ? r->rdsp.put_chroma_pixels_tab : r->rdsp.avg_chroma_pixels_tab);
841 }
842 if(weighted)
843 rv4_weight(r);
844 }
845
846 /** number of motion vectors in each macroblock type */
847 static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
848
849 /**
850 * Decode motion vector differences
851 * and perform motion vector reconstruction and motion compensation.
852 */
rv34_decode_mv(RV34DecContext * r,int block_type)853 static int rv34_decode_mv(RV34DecContext *r, int block_type)
854 {
855 MpegEncContext *s = &r->s;
856 GetBitContext *gb = &s->gb;
857 int i, j, k, l;
858 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
859 int next_bt;
860
861 memset(r->dmv, 0, sizeof(r->dmv));
862 for(i = 0; i < num_mvs[block_type]; i++){
863 r->dmv[i][0] = get_interleaved_se_golomb(gb);
864 r->dmv[i][1] = get_interleaved_se_golomb(gb);
865 if (r->dmv[i][0] == INVALID_VLC ||
866 r->dmv[i][1] == INVALID_VLC) {
867 r->dmv[i][0] = r->dmv[i][1] = 0;
868 return AVERROR_INVALIDDATA;
869 }
870 }
871 switch(block_type){
872 case RV34_MB_TYPE_INTRA:
873 case RV34_MB_TYPE_INTRA16x16:
874 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
875 return 0;
876 case RV34_MB_SKIP:
877 if(s->pict_type == AV_PICTURE_TYPE_P){
878 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
879 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
880 break;
881 }
882 case RV34_MB_B_DIRECT:
883 //surprisingly, it uses motion scheme from next reference frame
884 /* wait for the current mb row to be finished */
885 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
886 ff_thread_await_progress(&s->next_picture_ptr->tf, FFMAX(0, s->mb_y-1), 0);
887
888 next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
889 if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
890 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
891 ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
892 }else
893 for(j = 0; j < 2; j++)
894 for(i = 0; i < 2; i++)
895 for(k = 0; k < 2; k++)
896 for(l = 0; l < 2; l++)
897 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]);
898 if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
899 rv34_mc_2mv(r, block_type);
900 else
901 rv34_mc_2mv_skip(r);
902 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
903 break;
904 case RV34_MB_P_16x16:
905 case RV34_MB_P_MIX16x16:
906 rv34_pred_mv(r, block_type, 0, 0);
907 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
908 break;
909 case RV34_MB_B_FORWARD:
910 case RV34_MB_B_BACKWARD:
911 r->dmv[1][0] = r->dmv[0][0];
912 r->dmv[1][1] = r->dmv[0][1];
913 if(r->rv30)
914 rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
915 else
916 rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
917 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
918 break;
919 case RV34_MB_P_16x8:
920 case RV34_MB_P_8x16:
921 rv34_pred_mv(r, block_type, 0, 0);
922 rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
923 if(block_type == RV34_MB_P_16x8){
924 rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
925 rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
926 }
927 if(block_type == RV34_MB_P_8x16){
928 rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
929 rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
930 }
931 break;
932 case RV34_MB_B_BIDIR:
933 rv34_pred_mv_b (r, block_type, 0);
934 rv34_pred_mv_b (r, block_type, 1);
935 rv34_mc_2mv (r, block_type);
936 break;
937 case RV34_MB_P_8x8:
938 for(i=0;i< 4;i++){
939 rv34_pred_mv(r, block_type, i, i);
940 rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
941 }
942 break;
943 }
944
945 return 0;
946 }
947 /** @} */ // mv group
948
949 /**
950 * @name Macroblock reconstruction functions
951 * @{
952 */
953 /** mapping of RV30/40 intra prediction types to standard H.264 types */
954 static const int ittrans[9] = {
955 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
956 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
957 };
958
959 /** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
960 static const int ittrans16[4] = {
961 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
962 };
963
964 /**
965 * Perform 4x4 intra prediction.
966 */
rv34_pred_4x4_block(RV34DecContext * r,uint8_t * dst,int stride,int itype,int up,int left,int down,int right)967 static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
968 {
969 uint8_t *prev = dst - stride + 4;
970 uint32_t topleft;
971
972 if(!up && !left)
973 itype = DC_128_PRED;
974 else if(!up){
975 if(itype == VERT_PRED) itype = HOR_PRED;
976 if(itype == DC_PRED) itype = LEFT_DC_PRED;
977 }else if(!left){
978 if(itype == HOR_PRED) itype = VERT_PRED;
979 if(itype == DC_PRED) itype = TOP_DC_PRED;
980 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
981 }
982 if(!down){
983 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
984 if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
985 if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
986 }
987 if(!right && up){
988 topleft = dst[-stride + 3] * 0x01010101u;
989 prev = (uint8_t*)&topleft;
990 }
991 r->h.pred4x4[itype](dst, prev, stride);
992 }
993
adjust_pred16(int itype,int up,int left)994 static inline int adjust_pred16(int itype, int up, int left)
995 {
996 if(!up && !left)
997 itype = DC_128_PRED8x8;
998 else if(!up){
999 if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
1000 if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
1001 if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
1002 }else if(!left){
1003 if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
1004 if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
1005 if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
1006 }
1007 return itype;
1008 }
1009
rv34_process_block(RV34DecContext * r,uint8_t * pdst,int stride,int fc,int sc,int q_dc,int q_ac)1010 static inline void rv34_process_block(RV34DecContext *r,
1011 uint8_t *pdst, int stride,
1012 int fc, int sc, int q_dc, int q_ac)
1013 {
1014 MpegEncContext *s = &r->s;
1015 int16_t *ptr = s->block[0];
1016 int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
1017 fc, sc, q_dc, q_ac, q_ac);
1018 if(has_ac){
1019 r->rdsp.rv34_idct_add(pdst, stride, ptr);
1020 }else{
1021 r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1022 ptr[0] = 0;
1023 }
1024 }
1025
rv34_output_i16x16(RV34DecContext * r,int8_t * intra_types,int cbp)1026 static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1027 {
1028 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1029 MpegEncContext *s = &r->s;
1030 GetBitContext *gb = &s->gb;
1031 int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1032 q_ac = rv34_qscale_tab[s->qscale];
1033 uint8_t *dst = s->dest[0];
1034 int16_t *ptr = s->block[0];
1035 int i, j, itype, has_ac;
1036
1037 memset(block16, 0, 16 * sizeof(*block16));
1038
1039 has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1040 if(has_ac)
1041 r->rdsp.rv34_inv_transform(block16);
1042 else
1043 r->rdsp.rv34_inv_transform_dc(block16);
1044
1045 itype = ittrans16[intra_types[0]];
1046 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1047 r->h.pred16x16[itype](dst, s->linesize);
1048
1049 for(j = 0; j < 4; j++){
1050 for(i = 0; i < 4; i++, cbp >>= 1){
1051 int dc = block16[i + j*4];
1052
1053 if(cbp & 1){
1054 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1055 }else
1056 has_ac = 0;
1057
1058 if(has_ac){
1059 ptr[0] = dc;
1060 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1061 }else
1062 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1063 }
1064
1065 dst += 4*s->linesize;
1066 }
1067
1068 itype = ittrans16[intra_types[0]];
1069 if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1070 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1071
1072 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1073 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1074
1075 for(j = 1; j < 3; j++){
1076 dst = s->dest[j];
1077 r->h.pred8x8[itype](dst, s->uvlinesize);
1078 for(i = 0; i < 4; i++, cbp >>= 1){
1079 uint8_t *pdst;
1080 if(!(cbp & 1)) continue;
1081 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1082
1083 rv34_process_block(r, pdst, s->uvlinesize,
1084 r->chroma_vlc, 1, q_dc, q_ac);
1085 }
1086 }
1087 }
1088
rv34_output_intra(RV34DecContext * r,int8_t * intra_types,int cbp)1089 static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1090 {
1091 MpegEncContext *s = &r->s;
1092 uint8_t *dst = s->dest[0];
1093 int avail[6*8] = {0};
1094 int i, j, k;
1095 int idx, q_ac, q_dc;
1096
1097 // Set neighbour information.
1098 if(r->avail_cache[1])
1099 avail[0] = 1;
1100 if(r->avail_cache[2])
1101 avail[1] = avail[2] = 1;
1102 if(r->avail_cache[3])
1103 avail[3] = avail[4] = 1;
1104 if(r->avail_cache[4])
1105 avail[5] = 1;
1106 if(r->avail_cache[5])
1107 avail[8] = avail[16] = 1;
1108 if(r->avail_cache[9])
1109 avail[24] = avail[32] = 1;
1110
1111 q_ac = rv34_qscale_tab[s->qscale];
1112 for(j = 0; j < 4; j++){
1113 idx = 9 + j*8;
1114 for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1115 rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1116 avail[idx] = 1;
1117 if(!(cbp & 1)) continue;
1118
1119 rv34_process_block(r, dst, s->linesize,
1120 r->luma_vlc, 0, q_ac, q_ac);
1121 }
1122 dst += s->linesize * 4 - 4*4;
1123 intra_types += r->intra_types_stride;
1124 }
1125
1126 intra_types -= r->intra_types_stride * 4;
1127
1128 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1129 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1130
1131 for(k = 0; k < 2; k++){
1132 dst = s->dest[1+k];
1133 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1134
1135 for(j = 0; j < 2; j++){
1136 int* acache = r->avail_cache + 6 + j*4;
1137 for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1138 int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1139 rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1140 acache[0] = 1;
1141
1142 if(!(cbp&1)) continue;
1143
1144 rv34_process_block(r, dst + 4*i, s->uvlinesize,
1145 r->chroma_vlc, 1, q_dc, q_ac);
1146 }
1147
1148 dst += 4*s->uvlinesize;
1149 }
1150 }
1151 }
1152
is_mv_diff_gt_3(int16_t (* motion_val)[2],int step)1153 static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1154 {
1155 int d;
1156 d = motion_val[0][0] - motion_val[-step][0];
1157 if(d < -3 || d > 3)
1158 return 1;
1159 d = motion_val[0][1] - motion_val[-step][1];
1160 if(d < -3 || d > 3)
1161 return 1;
1162 return 0;
1163 }
1164
rv34_set_deblock_coef(RV34DecContext * r)1165 static int rv34_set_deblock_coef(RV34DecContext *r)
1166 {
1167 MpegEncContext *s = &r->s;
1168 int hmvmask = 0, vmvmask = 0, i, j;
1169 int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1170 int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
1171 for(j = 0; j < 16; j += 8){
1172 for(i = 0; i < 2; i++){
1173 if(is_mv_diff_gt_3(motion_val + i, 1))
1174 vmvmask |= 0x11 << (j + i*2);
1175 if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1176 hmvmask |= 0x03 << (j + i*2);
1177 }
1178 motion_val += s->b8_stride;
1179 }
1180 if(s->first_slice_line)
1181 hmvmask &= ~0x000F;
1182 if(!s->mb_x)
1183 vmvmask &= ~0x1111;
1184 if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1185 vmvmask |= (vmvmask & 0x4444) >> 1;
1186 hmvmask |= (hmvmask & 0x0F00) >> 4;
1187 if(s->mb_x)
1188 r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1189 if(!s->first_slice_line)
1190 r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1191 }
1192 return hmvmask | vmvmask;
1193 }
1194
rv34_decode_inter_macroblock(RV34DecContext * r,int8_t * intra_types)1195 static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1196 {
1197 MpegEncContext *s = &r->s;
1198 GetBitContext *gb = &s->gb;
1199 uint8_t *dst = s->dest[0];
1200 int16_t *ptr = s->block[0];
1201 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1202 int cbp, cbp2;
1203 int q_dc, q_ac, has_ac;
1204 int i, j;
1205 int dist;
1206
1207 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1208 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1209 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1210 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1211 if(s->mb_x && dist)
1212 r->avail_cache[5] =
1213 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1214 if(dist >= s->mb_width)
1215 r->avail_cache[2] =
1216 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1217 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1218 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1219 if(s->mb_x && dist > s->mb_width)
1220 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1221
1222 s->qscale = r->si.quant;
1223 cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1224 r->cbp_luma [mb_pos] = cbp;
1225 r->cbp_chroma[mb_pos] = cbp >> 16;
1226 r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1227 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1228
1229 if(cbp == -1)
1230 return -1;
1231
1232 if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
1233 if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1234 else rv34_output_intra(r, intra_types, cbp);
1235 return 0;
1236 }
1237
1238 if(r->is16){
1239 // Only for RV34_MB_P_MIX16x16
1240 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1241 memset(block16, 0, 16 * sizeof(*block16));
1242 q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1243 q_ac = rv34_qscale_tab[s->qscale];
1244 if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1245 r->rdsp.rv34_inv_transform(block16);
1246 else
1247 r->rdsp.rv34_inv_transform_dc(block16);
1248
1249 q_ac = rv34_qscale_tab[s->qscale];
1250
1251 for(j = 0; j < 4; j++){
1252 for(i = 0; i < 4; i++, cbp >>= 1){
1253 int dc = block16[i + j*4];
1254
1255 if(cbp & 1){
1256 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1257 }else
1258 has_ac = 0;
1259
1260 if(has_ac){
1261 ptr[0] = dc;
1262 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1263 }else
1264 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1265 }
1266
1267 dst += 4*s->linesize;
1268 }
1269
1270 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1271 }else{
1272 q_ac = rv34_qscale_tab[s->qscale];
1273
1274 for(j = 0; j < 4; j++){
1275 for(i = 0; i < 4; i++, cbp >>= 1){
1276 if(!(cbp & 1)) continue;
1277
1278 rv34_process_block(r, dst + 4*i, s->linesize,
1279 r->luma_vlc, 0, q_ac, q_ac);
1280 }
1281 dst += 4*s->linesize;
1282 }
1283 }
1284
1285 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1286 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1287
1288 for(j = 1; j < 3; j++){
1289 dst = s->dest[j];
1290 for(i = 0; i < 4; i++, cbp >>= 1){
1291 uint8_t *pdst;
1292 if(!(cbp & 1)) continue;
1293 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1294
1295 rv34_process_block(r, pdst, s->uvlinesize,
1296 r->chroma_vlc, 1, q_dc, q_ac);
1297 }
1298 }
1299
1300 return 0;
1301 }
1302
rv34_decode_intra_macroblock(RV34DecContext * r,int8_t * intra_types)1303 static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1304 {
1305 MpegEncContext *s = &r->s;
1306 int cbp, dist;
1307 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1308
1309 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1310 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1311 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1312 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1313 if(s->mb_x && dist)
1314 r->avail_cache[5] =
1315 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1316 if(dist >= s->mb_width)
1317 r->avail_cache[2] =
1318 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1319 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1320 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1321 if(s->mb_x && dist > s->mb_width)
1322 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1323
1324 s->qscale = r->si.quant;
1325 cbp = rv34_decode_intra_mb_header(r, intra_types);
1326 r->cbp_luma [mb_pos] = cbp;
1327 r->cbp_chroma[mb_pos] = cbp >> 16;
1328 r->deblock_coefs[mb_pos] = 0xFFFF;
1329 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1330
1331 if(cbp == -1)
1332 return -1;
1333
1334 if(r->is16){
1335 rv34_output_i16x16(r, intra_types, cbp);
1336 return 0;
1337 }
1338
1339 rv34_output_intra(r, intra_types, cbp);
1340 return 0;
1341 }
1342
check_slice_end(RV34DecContext * r,MpegEncContext * s)1343 static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
1344 {
1345 int bits;
1346 if(s->mb_y >= s->mb_height)
1347 return 1;
1348 if(!s->mb_num_left)
1349 return 1;
1350 if(r->s.mb_skip_run > 1)
1351 return 0;
1352 bits = get_bits_left(&s->gb);
1353 if(bits <= 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1354 return 1;
1355 return 0;
1356 }
1357
1358
rv34_decoder_free(RV34DecContext * r)1359 static void rv34_decoder_free(RV34DecContext *r)
1360 {
1361 av_freep(&r->intra_types_hist);
1362 r->intra_types = NULL;
1363 av_freep(&r->tmp_b_block_base);
1364 av_freep(&r->mb_type);
1365 av_freep(&r->cbp_luma);
1366 av_freep(&r->cbp_chroma);
1367 av_freep(&r->deblock_coefs);
1368 }
1369
1370
rv34_decoder_alloc(RV34DecContext * r)1371 static int rv34_decoder_alloc(RV34DecContext *r)
1372 {
1373 r->intra_types_stride = r->s.mb_width * 4 + 4;
1374
1375 r->cbp_chroma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1376 sizeof(*r->cbp_chroma));
1377 r->cbp_luma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1378 sizeof(*r->cbp_luma));
1379 r->deblock_coefs = av_mallocz(r->s.mb_stride * r->s.mb_height *
1380 sizeof(*r->deblock_coefs));
1381 r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 *
1382 sizeof(*r->intra_types_hist));
1383 r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1384 sizeof(*r->mb_type));
1385
1386 if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1387 r->intra_types_hist && r->mb_type)) {
1388 r->s.context_reinit = 1;
1389 rv34_decoder_free(r);
1390 return AVERROR(ENOMEM);
1391 }
1392
1393 r->intra_types = r->intra_types_hist + r->intra_types_stride * 4;
1394
1395 return 0;
1396 }
1397
1398
rv34_decoder_realloc(RV34DecContext * r)1399 static int rv34_decoder_realloc(RV34DecContext *r)
1400 {
1401 rv34_decoder_free(r);
1402 return rv34_decoder_alloc(r);
1403 }
1404
1405
rv34_decode_slice(RV34DecContext * r,int end,const uint8_t * buf,int buf_size)1406 static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1407 {
1408 MpegEncContext *s = &r->s;
1409 GetBitContext *gb = &s->gb;
1410 int mb_pos, slice_type;
1411 int res;
1412
1413 init_get_bits(&r->s.gb, buf, buf_size*8);
1414 res = r->parse_slice_header(r, gb, &r->si);
1415 if(res < 0){
1416 av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1417 return -1;
1418 }
1419
1420 slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1421 if (slice_type != s->pict_type) {
1422 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1423 return AVERROR_INVALIDDATA;
1424 }
1425 if (s->width != r->si.width || s->height != r->si.height) {
1426 av_log(s->avctx, AV_LOG_ERROR, "Size mismatch\n");
1427 return AVERROR_INVALIDDATA;
1428 }
1429
1430 r->si.end = end;
1431 s->qscale = r->si.quant;
1432 s->mb_num_left = r->si.end - r->si.start;
1433 r->s.mb_skip_run = 0;
1434
1435 mb_pos = s->mb_x + s->mb_y * s->mb_width;
1436 if(r->si.start != mb_pos){
1437 av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1438 s->mb_x = r->si.start % s->mb_width;
1439 s->mb_y = r->si.start / s->mb_width;
1440 }
1441 memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1442 s->first_slice_line = 1;
1443 s->resync_mb_x = s->mb_x;
1444 s->resync_mb_y = s->mb_y;
1445
1446 ff_init_block_index(s);
1447 while(!check_slice_end(r, s)) {
1448 ff_update_block_index(s);
1449
1450 if(r->si.type)
1451 res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1452 else
1453 res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1454 if(res < 0){
1455 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1456 return -1;
1457 }
1458 if (++s->mb_x == s->mb_width) {
1459 s->mb_x = 0;
1460 s->mb_y++;
1461 ff_init_block_index(s);
1462
1463 memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1464 memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1465
1466 if(r->loop_filter && s->mb_y >= 2)
1467 r->loop_filter(r, s->mb_y - 2);
1468
1469 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1470 ff_thread_report_progress(&s->current_picture_ptr->tf,
1471 s->mb_y - 2, 0);
1472
1473 }
1474 if(s->mb_x == s->resync_mb_x)
1475 s->first_slice_line=0;
1476 s->mb_num_left--;
1477 }
1478 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1479
1480 return s->mb_y == s->mb_height;
1481 }
1482
1483 /** @} */ // reconstruction group end
1484
1485 /**
1486 * Initialize decoder.
1487 */
ff_rv34_decode_init(AVCodecContext * avctx)1488 av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
1489 {
1490 static AVOnce init_static_once = AV_ONCE_INIT;
1491 RV34DecContext *r = avctx->priv_data;
1492 MpegEncContext *s = &r->s;
1493 int ret;
1494
1495 ff_mpv_decode_init(s, avctx);
1496 s->out_format = FMT_H263;
1497
1498 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1499 avctx->has_b_frames = 1;
1500 s->low_delay = 0;
1501
1502 ff_mpv_idct_init(s);
1503 if ((ret = ff_mpv_common_init(s)) < 0)
1504 return ret;
1505
1506 ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1507
1508 if ((ret = rv34_decoder_alloc(r)) < 0) {
1509 ff_mpv_common_end(&r->s);
1510 return ret;
1511 }
1512
1513 ff_thread_once(&init_static_once, rv34_init_tables);
1514
1515 return 0;
1516 }
1517
ff_rv34_decode_update_thread_context(AVCodecContext * dst,const AVCodecContext * src)1518 int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1519 {
1520 RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1521 MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1522 int err;
1523
1524 if (dst == src || !s1->context_initialized)
1525 return 0;
1526
1527 if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
1528 s->height = s1->height;
1529 s->width = s1->width;
1530 if ((err = ff_mpv_common_frame_size_change(s)) < 0)
1531 return err;
1532 if ((err = rv34_decoder_realloc(r)) < 0)
1533 return err;
1534 }
1535
1536 r->cur_pts = r1->cur_pts;
1537 r->last_pts = r1->last_pts;
1538 r->next_pts = r1->next_pts;
1539
1540 memset(&r->si, 0, sizeof(r->si));
1541
1542 // Do no call ff_mpeg_update_thread_context on a partially initialized
1543 // decoder context.
1544 if (!s1->context_initialized)
1545 return 0;
1546
1547 return ff_mpeg_update_thread_context(dst, src);
1548 }
1549
get_slice_offset(AVCodecContext * avctx,const uint8_t * buf,int n,int slice_count,int buf_size)1550 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n, int slice_count, int buf_size)
1551 {
1552 if (n < slice_count) {
1553 if(avctx->slice_count) return avctx->slice_offset[n];
1554 else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1555 } else
1556 return buf_size;
1557 }
1558
finish_frame(AVCodecContext * avctx,AVFrame * pict)1559 static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1560 {
1561 RV34DecContext *r = avctx->priv_data;
1562 MpegEncContext *s = &r->s;
1563 int got_picture = 0, ret;
1564
1565 ff_er_frame_end(&s->er);
1566 ff_mpv_frame_end(s);
1567 s->mb_num_left = 0;
1568
1569 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1570 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1571
1572 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1573 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1574 return ret;
1575 ff_print_debug_info(s, s->current_picture_ptr, pict);
1576 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
1577 got_picture = 1;
1578 } else if (s->last_picture_ptr) {
1579 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1580 return ret;
1581 ff_print_debug_info(s, s->last_picture_ptr, pict);
1582 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
1583 got_picture = 1;
1584 }
1585
1586 return got_picture;
1587 }
1588
update_sar(int old_w,int old_h,AVRational sar,int new_w,int new_h)1589 static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, int new_h)
1590 {
1591 // attempt to keep aspect during typical resolution switches
1592 if (!sar.num)
1593 sar = (AVRational){1, 1};
1594
1595 sar = av_mul_q(sar, av_mul_q((AVRational){new_h, new_w}, (AVRational){old_w, old_h}));
1596 return sar;
1597 }
1598
ff_rv34_decode_frame(AVCodecContext * avctx,AVFrame * pict,int * got_picture_ptr,AVPacket * avpkt)1599 int ff_rv34_decode_frame(AVCodecContext *avctx, AVFrame *pict,
1600 int *got_picture_ptr, AVPacket *avpkt)
1601 {
1602 const uint8_t *buf = avpkt->data;
1603 int buf_size = avpkt->size;
1604 RV34DecContext *r = avctx->priv_data;
1605 MpegEncContext *s = &r->s;
1606 SliceInfo si;
1607 int i, ret;
1608 int slice_count;
1609 const uint8_t *slices_hdr = NULL;
1610 int last = 0;
1611 int faulty_b = 0;
1612 int offset;
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 offset = get_slice_offset(avctx, slices_hdr, 0, slice_count, buf_size);
1636 //parse first slice header to check whether this frame can be decoded
1637 if(offset < 0 || offset > 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+offset, (buf_size-offset)*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 faulty_b = 1;
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 && s->current_picture_ptr) {
1660 av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
1661 s->mb_num_left);
1662 if (!s->context_reinit)
1663 ff_er_frame_end(&s->er);
1664 ff_mpv_frame_end(s);
1665 }
1666
1667 if (s->width != si.width || s->height != si.height || s->context_reinit) {
1668 int err;
1669
1670 av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1671 si.width, si.height);
1672
1673 if (av_image_check_size(si.width, si.height, 0, s->avctx))
1674 return AVERROR_INVALIDDATA;
1675
1676 s->avctx->sample_aspect_ratio = update_sar(
1677 s->width, s->height, s->avctx->sample_aspect_ratio,
1678 si.width, si.height);
1679 s->width = si.width;
1680 s->height = si.height;
1681
1682 err = ff_set_dimensions(s->avctx, s->width, s->height);
1683 if (err < 0)
1684 return err;
1685 if ((err = ff_mpv_common_frame_size_change(s)) < 0)
1686 return err;
1687 if ((err = rv34_decoder_realloc(r)) < 0)
1688 return err;
1689 }
1690 if (faulty_b)
1691 return AVERROR_INVALIDDATA;
1692 s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1693 if (ff_mpv_frame_start(s, s->avctx) < 0)
1694 return -1;
1695 ff_mpeg_er_frame_start(s);
1696 if (!r->tmp_b_block_base) {
1697 int i;
1698
1699 r->tmp_b_block_base = av_malloc(s->linesize * 48);
1700 for (i = 0; i < 2; i++)
1701 r->tmp_b_block_y[i] = r->tmp_b_block_base
1702 + i * 16 * s->linesize;
1703 for (i = 0; i < 4; i++)
1704 r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1705 + (i >> 1) * 8 * s->uvlinesize
1706 + (i & 1) * 16;
1707 }
1708 r->cur_pts = si.pts;
1709 if (s->pict_type != AV_PICTURE_TYPE_B) {
1710 r->last_pts = r->next_pts;
1711 r->next_pts = r->cur_pts;
1712 } else {
1713 int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1714 int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1715 int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1716
1717 if(!refdist){
1718 r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1719 r->scaled_weight = 0;
1720 }else{
1721 if (FFMAX(dist0, dist1) > refdist)
1722 av_log(avctx, AV_LOG_TRACE, "distance overflow\n");
1723
1724 r->mv_weight1 = (dist0 << 14) / refdist;
1725 r->mv_weight2 = (dist1 << 14) / refdist;
1726 if((r->mv_weight1|r->mv_weight2) & 511){
1727 r->weight1 = r->mv_weight1;
1728 r->weight2 = r->mv_weight2;
1729 r->scaled_weight = 0;
1730 }else{
1731 r->weight1 = r->mv_weight1 >> 9;
1732 r->weight2 = r->mv_weight2 >> 9;
1733 r->scaled_weight = 1;
1734 }
1735 }
1736 }
1737 s->mb_x = s->mb_y = 0;
1738 ff_thread_finish_setup(s->avctx);
1739 } else if (s->context_reinit) {
1740 av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames to "
1741 "reinitialize (start MB is %d).\n", si.start);
1742 return AVERROR_INVALIDDATA;
1743 } else if (HAVE_THREADS &&
1744 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1745 av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1746 "multithreading mode (start MB is %d).\n", si.start);
1747 return AVERROR_INVALIDDATA;
1748 }
1749
1750 for(i = 0; i < slice_count; i++){
1751 int offset = get_slice_offset(avctx, slices_hdr, i , slice_count, buf_size);
1752 int offset1 = get_slice_offset(avctx, slices_hdr, i+1, slice_count, buf_size);
1753 int size;
1754
1755 if(offset < 0 || offset > offset1 || offset1 > buf_size){
1756 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1757 break;
1758 }
1759 size = offset1 - offset;
1760
1761 r->si.end = s->mb_width * s->mb_height;
1762 s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1763
1764 if(i+1 < slice_count){
1765 int offset2 = get_slice_offset(avctx, slices_hdr, i+2, slice_count, buf_size);
1766 if (offset2 < offset1 || offset2 > buf_size) {
1767 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1768 break;
1769 }
1770 init_get_bits(&s->gb, buf+offset1, (buf_size-offset1)*8);
1771 if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1772 size = offset2 - offset;
1773 }else
1774 r->si.end = si.start;
1775 }
1776 av_assert0 (size >= 0 && size <= buf_size - offset);
1777 last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1778 if(last)
1779 break;
1780 }
1781
1782 if (s->current_picture_ptr) {
1783 if (last) {
1784 if(r->loop_filter)
1785 r->loop_filter(r, s->mb_height - 1);
1786
1787 ret = finish_frame(avctx, pict);
1788 if (ret < 0)
1789 return ret;
1790 *got_picture_ptr = ret;
1791 } else if (HAVE_THREADS &&
1792 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1793 av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1794 /* always mark the current frame as finished, frame-mt supports
1795 * only complete frames */
1796 ff_er_frame_end(&s->er);
1797 ff_mpv_frame_end(s);
1798 s->mb_num_left = 0;
1799 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1800 return AVERROR_INVALIDDATA;
1801 }
1802 }
1803
1804 return avpkt->size;
1805 }
1806
ff_rv34_decode_end(AVCodecContext * avctx)1807 av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
1808 {
1809 RV34DecContext *r = avctx->priv_data;
1810
1811 ff_mpv_common_end(&r->s);
1812 rv34_decoder_free(r);
1813
1814 return 0;
1815 }
1816