a131c105eb9ba393e8239562623523b5c8d27f54
[libav.git] / libavcodec / rv34.c
1 /*
2 * RV30/40 decoder common data
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * RV30/40 decoder common data
25 */
26
27 #include "libavutil/internal.h"
28
29 #include "avcodec.h"
30 #include "mpegvideo.h"
31 #include "golomb.h"
32 #include "internal.h"
33 #include "mathops.h"
34 #include "rectangle.h"
35 #include "thread.h"
36
37 #include "rv34vlc.h"
38 #include "rv34data.h"
39 #include "rv34.h"
40
41 //#define DEBUG
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] = {
51 MB_TYPE_INTRA,
52 MB_TYPE_INTRA16x16 | MB_TYPE_SEPARATE_DC,
53 MB_TYPE_16x16 | MB_TYPE_L0,
54 MB_TYPE_8x8 | MB_TYPE_L0,
55 MB_TYPE_16x16 | MB_TYPE_L0,
56 MB_TYPE_16x16 | MB_TYPE_L1,
57 MB_TYPE_SKIP,
58 MB_TYPE_DIRECT2 | MB_TYPE_16x16,
59 MB_TYPE_16x8 | MB_TYPE_L0,
60 MB_TYPE_8x16 | MB_TYPE_L0,
61 MB_TYPE_16x16 | MB_TYPE_L0L1,
62 MB_TYPE_16x16 | MB_TYPE_L0 | MB_TYPE_SEPARATE_DC
63 };
64
65
66 static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
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];
112 uint8_t bits2[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 bistream 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 */
327 int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
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){
359 s->current_picture_ptr->f.mb_type[mb_pos] = MB_TYPE_INTRA16x16;
360 r->block_type = RV34_MB_TYPE_INTRA16x16;
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 }
369 s->current_picture_ptr->f.mb_type[mb_pos] = MB_TYPE_INTRA;
370 r->block_type = RV34_MB_TYPE_INTRA;
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;
395 s->current_picture_ptr->f.mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type];
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->f.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->f.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->f.motion_val[0][mv_pos-1][0];
478 A[1] = s->current_picture_ptr->f.motion_val[0][mv_pos-1][1];
479 }
480 if(avail[-4]){
481 B[0] = s->current_picture_ptr->f.motion_val[0][mv_pos-s->b8_stride][0];
482 B[1] = s->current_picture_ptr->f.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->f.motion_val[0][mv_pos-s->b8_stride-1][0];
490 C[1] = s->current_picture_ptr->f.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->f.motion_val[0][mv_pos-s->b8_stride+c_off][0];
497 C[1] = s->current_picture_ptr->f.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->f.motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
506 s->current_picture_ptr->f.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->f.mb_type[mb_pos];
558
559 if((r->avail_cache[6-1] & type) & mask){
560 A[0] = cur_pic->f.motion_val[dir][mv_pos - 1][0];
561 A[1] = cur_pic->f.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->f.motion_val[dir][mv_pos - s->b8_stride][0];
566 B[1] = cur_pic->f.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->f.motion_val[dir][mv_pos - s->b8_stride + 2][0];
571 C[1] = cur_pic->f.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->f.motion_val[dir][mv_pos - s->b8_stride - 1][0];
575 C[1] = cur_pic->f.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->f.motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
587 cur_pic->f.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->f.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->f.motion_val[0][mv_pos - 1][0];
609 A[1] = s->current_picture_ptr->f.motion_val[0][mv_pos - 1][1];
610 }
611 if(avail[-4]){
612 B[0] = s->current_picture_ptr->f.motion_val[0][mv_pos - s->b8_stride][0];
613 B[1] = s->current_picture_ptr->f.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->f.motion_val[0][mv_pos - s->b8_stride - 1][0];
621 C[1] = s->current_picture_ptr->f.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->f.motion_val[0][mv_pos - s->b8_stride + 2][0];
628 C[1] = s->current_picture_ptr->f.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->f.motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
638 s->current_picture_ptr->f.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],
666 h264_chroma_mc_func (*chroma_mc))
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->f.motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
677 my = (s->current_picture_ptr->f.motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
678 lx = (s->current_picture_ptr->f.motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
679 ly = (s->current_picture_ptr->f.motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
680 chroma_mx = s->current_picture_ptr->f.motion_val[dir][mv_pos][0] / 2;
681 chroma_my = s->current_picture_ptr->f.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->f.motion_val[dir][mv_pos][0] >> 2;
689 my = s->current_picture_ptr->f.motion_val[dir][mv_pos][1] >> 2;
690 lx = s->current_picture_ptr->f.motion_val[dir][mv_pos][0] & 3;
691 ly = s->current_picture_ptr->f.motion_val[dir][mv_pos][1] & 3;
692 cx = s->current_picture_ptr->f.motion_val[dir][mv_pos][0] / 2;
693 cy = s->current_picture_ptr->f.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 AVFrame *f = dir ? &s->next_picture_ptr->f : &s->last_picture_ptr->f;
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;
727 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, (width<<3)+6, (height<<3)+6,
728 src_x - 2, src_y - 2, s->h_edge_pos, s->v_edge_pos);
729 srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
730 s->vdsp.emulated_edge_mc(uvbuf , srcU, s->uvlinesize, (width<<2)+1, (height<<2)+1,
731 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
732 s->vdsp.emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, (width<<2)+1, (height<<2)+1,
733 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
734 srcU = uvbuf;
735 srcV = uvbuf + 16;
736 }
737 if(!weighted){
738 Y = s->dest[0] + xoff + yoff *s->linesize;
739 U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
740 V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
741 }else{
742 Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
743 U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
744 V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
745 }
746
747 if(block_type == RV34_MB_P_16x8){
748 qpel_mc[1][dxy](Y, srcY, s->linesize);
749 Y += 8;
750 srcY += 8;
751 }else if(block_type == RV34_MB_P_8x16){
752 qpel_mc[1][dxy](Y, srcY, s->linesize);
753 Y += 8 * s->linesize;
754 srcY += 8 * s->linesize;
755 }
756 is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
757 qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
758 chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
759 chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
760 }
761
762 static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
763 const int xoff, const int yoff, int mv_off,
764 const int width, const int height, int dir)
765 {
766 rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
767 r->rdsp.put_pixels_tab,
768 r->rdsp.put_chroma_pixels_tab);
769 }
770
771 static void rv4_weight(RV34DecContext *r)
772 {
773 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][0](r->s.dest[0],
774 r->tmp_b_block_y[0],
775 r->tmp_b_block_y[1],
776 r->weight1,
777 r->weight2,
778 r->s.linesize);
779 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[1],
780 r->tmp_b_block_uv[0],
781 r->tmp_b_block_uv[2],
782 r->weight1,
783 r->weight2,
784 r->s.uvlinesize);
785 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[2],
786 r->tmp_b_block_uv[1],
787 r->tmp_b_block_uv[3],
788 r->weight1,
789 r->weight2,
790 r->s.uvlinesize);
791 }
792
793 static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
794 {
795 int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
796
797 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
798 r->rdsp.put_pixels_tab,
799 r->rdsp.put_chroma_pixels_tab);
800 if(!weighted){
801 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
802 r->rdsp.avg_pixels_tab,
803 r->rdsp.avg_chroma_pixels_tab);
804 }else{
805 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
806 r->rdsp.put_pixels_tab,
807 r->rdsp.put_chroma_pixels_tab);
808 rv4_weight(r);
809 }
810 }
811
812 static void rv34_mc_2mv_skip(RV34DecContext *r)
813 {
814 int i, j;
815 int weighted = !r->rv30 && r->weight1 != 8192;
816
817 for(j = 0; j < 2; j++)
818 for(i = 0; i < 2; i++){
819 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
820 weighted,
821 r->rdsp.put_pixels_tab,
822 r->rdsp.put_chroma_pixels_tab);
823 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
824 weighted,
825 weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
826 weighted ? r->rdsp.put_chroma_pixels_tab : r->rdsp.avg_chroma_pixels_tab);
827 }
828 if(weighted)
829 rv4_weight(r);
830 }
831
832 /** number of motion vectors in each macroblock type */
833 static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
834
835 /**
836 * Decode motion vector differences
837 * and perform motion vector reconstruction and motion compensation.
838 */
839 static int rv34_decode_mv(RV34DecContext *r, int block_type)
840 {
841 MpegEncContext *s = &r->s;
842 GetBitContext *gb = &s->gb;
843 int i, j, k, l;
844 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
845 int next_bt;
846
847 memset(r->dmv, 0, sizeof(r->dmv));
848 for(i = 0; i < num_mvs[block_type]; i++){
849 r->dmv[i][0] = svq3_get_se_golomb(gb);
850 r->dmv[i][1] = svq3_get_se_golomb(gb);
851 }
852 switch(block_type){
853 case RV34_MB_TYPE_INTRA:
854 case RV34_MB_TYPE_INTRA16x16:
855 ZERO8x2(s->current_picture_ptr->f.motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
856 return 0;
857 case RV34_MB_SKIP:
858 if(s->pict_type == AV_PICTURE_TYPE_P){
859 ZERO8x2(s->current_picture_ptr->f.motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
860 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
861 break;
862 }
863 case RV34_MB_B_DIRECT:
864 //surprisingly, it uses motion scheme from next reference frame
865 /* wait for the current mb row to be finished */
866 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
867 ff_thread_await_progress(&s->next_picture_ptr->f, FFMAX(0, s->mb_y-1), 0);
868
869 next_bt = s->next_picture_ptr->f.mb_type[s->mb_x + s->mb_y * s->mb_stride];
870 if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
871 ZERO8x2(s->current_picture_ptr->f.motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
872 ZERO8x2(s->current_picture_ptr->f.motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
873 }else
874 for(j = 0; j < 2; j++)
875 for(i = 0; i < 2; i++)
876 for(k = 0; k < 2; k++)
877 for(l = 0; l < 2; l++)
878 s->current_picture_ptr->f.motion_val[l][mv_pos + i + j*s->b8_stride][k] = calc_add_mv(r, l, s->next_picture_ptr->f.motion_val[0][mv_pos + i + j*s->b8_stride][k]);
879 if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
880 rv34_mc_2mv(r, block_type);
881 else
882 rv34_mc_2mv_skip(r);
883 ZERO8x2(s->current_picture_ptr->f.motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
884 break;
885 case RV34_MB_P_16x16:
886 case RV34_MB_P_MIX16x16:
887 rv34_pred_mv(r, block_type, 0, 0);
888 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
889 break;
890 case RV34_MB_B_FORWARD:
891 case RV34_MB_B_BACKWARD:
892 r->dmv[1][0] = r->dmv[0][0];
893 r->dmv[1][1] = r->dmv[0][1];
894 if(r->rv30)
895 rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
896 else
897 rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
898 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
899 break;
900 case RV34_MB_P_16x8:
901 case RV34_MB_P_8x16:
902 rv34_pred_mv(r, block_type, 0, 0);
903 rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
904 if(block_type == RV34_MB_P_16x8){
905 rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
906 rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
907 }
908 if(block_type == RV34_MB_P_8x16){
909 rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
910 rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
911 }
912 break;
913 case RV34_MB_B_BIDIR:
914 rv34_pred_mv_b (r, block_type, 0);
915 rv34_pred_mv_b (r, block_type, 1);
916 rv34_mc_2mv (r, block_type);
917 break;
918 case RV34_MB_P_8x8:
919 for(i=0;i< 4;i++){
920 rv34_pred_mv(r, block_type, i, i);
921 rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
922 }
923 break;
924 }
925
926 return 0;
927 }
928 /** @} */ // mv group
929
930 /**
931 * @name Macroblock reconstruction functions
932 * @{
933 */
934 /** mapping of RV30/40 intra prediction types to standard H.264 types */
935 static const int ittrans[9] = {
936 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
937 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
938 };
939
940 /** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
941 static const int ittrans16[4] = {
942 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
943 };
944
945 /**
946 * Perform 4x4 intra prediction.
947 */
948 static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
949 {
950 uint8_t *prev = dst - stride + 4;
951 uint32_t topleft;
952
953 if(!up && !left)
954 itype = DC_128_PRED;
955 else if(!up){
956 if(itype == VERT_PRED) itype = HOR_PRED;
957 if(itype == DC_PRED) itype = LEFT_DC_PRED;
958 }else if(!left){
959 if(itype == HOR_PRED) itype = VERT_PRED;
960 if(itype == DC_PRED) itype = TOP_DC_PRED;
961 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
962 }
963 if(!down){
964 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
965 if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
966 if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
967 }
968 if(!right && up){
969 topleft = dst[-stride + 3] * 0x01010101u;
970 prev = (uint8_t*)&topleft;
971 }
972 r->h.pred4x4[itype](dst, prev, stride);
973 }
974
975 static inline int adjust_pred16(int itype, int up, int left)
976 {
977 if(!up && !left)
978 itype = DC_128_PRED8x8;
979 else if(!up){
980 if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
981 if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
982 if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
983 }else if(!left){
984 if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
985 if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
986 if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
987 }
988 return itype;
989 }
990
991 static inline void rv34_process_block(RV34DecContext *r,
992 uint8_t *pdst, int stride,
993 int fc, int sc, int q_dc, int q_ac)
994 {
995 MpegEncContext *s = &r->s;
996 int16_t *ptr = s->block[0];
997 int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
998 fc, sc, q_dc, q_ac, q_ac);
999 if(has_ac){
1000 r->rdsp.rv34_idct_add(pdst, stride, ptr);
1001 }else{
1002 r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1003 ptr[0] = 0;
1004 }
1005 }
1006
1007 static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1008 {
1009 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1010 MpegEncContext *s = &r->s;
1011 GetBitContext *gb = &s->gb;
1012 int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1013 q_ac = rv34_qscale_tab[s->qscale];
1014 uint8_t *dst = s->dest[0];
1015 int16_t *ptr = s->block[0];
1016 int i, j, itype, has_ac;
1017
1018 memset(block16, 0, 16 * sizeof(*block16));
1019
1020 has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1021 if(has_ac)
1022 r->rdsp.rv34_inv_transform(block16);
1023 else
1024 r->rdsp.rv34_inv_transform_dc(block16);
1025
1026 itype = ittrans16[intra_types[0]];
1027 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1028 r->h.pred16x16[itype](dst, s->linesize);
1029
1030 for(j = 0; j < 4; j++){
1031 for(i = 0; i < 4; i++, cbp >>= 1){
1032 int dc = block16[i + j*4];
1033
1034 if(cbp & 1){
1035 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1036 }else
1037 has_ac = 0;
1038
1039 if(has_ac){
1040 ptr[0] = dc;
1041 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1042 }else
1043 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1044 }
1045
1046 dst += 4*s->linesize;
1047 }
1048
1049 itype = ittrans16[intra_types[0]];
1050 if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1051 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1052
1053 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1054 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1055
1056 for(j = 1; j < 3; j++){
1057 dst = s->dest[j];
1058 r->h.pred8x8[itype](dst, s->uvlinesize);
1059 for(i = 0; i < 4; i++, cbp >>= 1){
1060 uint8_t *pdst;
1061 if(!(cbp & 1)) continue;
1062 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1063
1064 rv34_process_block(r, pdst, s->uvlinesize,
1065 r->chroma_vlc, 1, q_dc, q_ac);
1066 }
1067 }
1068 }
1069
1070 static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1071 {
1072 MpegEncContext *s = &r->s;
1073 uint8_t *dst = s->dest[0];
1074 int avail[6*8] = {0};
1075 int i, j, k;
1076 int idx, q_ac, q_dc;
1077
1078 // Set neighbour information.
1079 if(r->avail_cache[1])
1080 avail[0] = 1;
1081 if(r->avail_cache[2])
1082 avail[1] = avail[2] = 1;
1083 if(r->avail_cache[3])
1084 avail[3] = avail[4] = 1;
1085 if(r->avail_cache[4])
1086 avail[5] = 1;
1087 if(r->avail_cache[5])
1088 avail[8] = avail[16] = 1;
1089 if(r->avail_cache[9])
1090 avail[24] = avail[32] = 1;
1091
1092 q_ac = rv34_qscale_tab[s->qscale];
1093 for(j = 0; j < 4; j++){
1094 idx = 9 + j*8;
1095 for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1096 rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1097 avail[idx] = 1;
1098 if(!(cbp & 1)) continue;
1099
1100 rv34_process_block(r, dst, s->linesize,
1101 r->luma_vlc, 0, q_ac, q_ac);
1102 }
1103 dst += s->linesize * 4 - 4*4;
1104 intra_types += r->intra_types_stride;
1105 }
1106
1107 intra_types -= r->intra_types_stride * 4;
1108
1109 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1110 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1111
1112 for(k = 0; k < 2; k++){
1113 dst = s->dest[1+k];
1114 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1115
1116 for(j = 0; j < 2; j++){
1117 int* acache = r->avail_cache + 6 + j*4;
1118 for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1119 int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1120 rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1121 acache[0] = 1;
1122
1123 if(!(cbp&1)) continue;
1124
1125 rv34_process_block(r, dst + 4*i, s->uvlinesize,
1126 r->chroma_vlc, 1, q_dc, q_ac);
1127 }
1128
1129 dst += 4*s->uvlinesize;
1130 }
1131 }
1132 }
1133
1134 static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1135 {
1136 int d;
1137 d = motion_val[0][0] - motion_val[-step][0];
1138 if(d < -3 || d > 3)
1139 return 1;
1140 d = motion_val[0][1] - motion_val[-step][1];
1141 if(d < -3 || d > 3)
1142 return 1;
1143 return 0;
1144 }
1145
1146 static int rv34_set_deblock_coef(RV34DecContext *r)
1147 {
1148 MpegEncContext *s = &r->s;
1149 int hmvmask = 0, vmvmask = 0, i, j;
1150 int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1151 int16_t (*motion_val)[2] = &s->current_picture_ptr->f.motion_val[0][midx];
1152 for(j = 0; j < 16; j += 8){
1153 for(i = 0; i < 2; i++){
1154 if(is_mv_diff_gt_3(motion_val + i, 1))
1155 vmvmask |= 0x11 << (j + i*2);
1156 if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1157 hmvmask |= 0x03 << (j + i*2);
1158 }
1159 motion_val += s->b8_stride;
1160 }
1161 if(s->first_slice_line)
1162 hmvmask &= ~0x000F;
1163 if(!s->mb_x)
1164 vmvmask &= ~0x1111;
1165 if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1166 vmvmask |= (vmvmask & 0x4444) >> 1;
1167 hmvmask |= (hmvmask & 0x0F00) >> 4;
1168 if(s->mb_x)
1169 r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1170 if(!s->first_slice_line)
1171 r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1172 }
1173 return hmvmask | vmvmask;
1174 }
1175
1176 static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1177 {
1178 MpegEncContext *s = &r->s;
1179 GetBitContext *gb = &s->gb;
1180 uint8_t *dst = s->dest[0];
1181 int16_t *ptr = s->block[0];
1182 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1183 int cbp, cbp2;
1184 int q_dc, q_ac, has_ac;
1185 int i, j;
1186 int dist;
1187
1188 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1189 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1190 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1191 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1192 if(s->mb_x && dist)
1193 r->avail_cache[5] =
1194 r->avail_cache[9] = s->current_picture_ptr->f.mb_type[mb_pos - 1];
1195 if(dist >= s->mb_width)
1196 r->avail_cache[2] =
1197 r->avail_cache[3] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride];
1198 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1199 r->avail_cache[4] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride + 1];
1200 if(s->mb_x && dist > s->mb_width)
1201 r->avail_cache[1] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride - 1];
1202
1203 s->qscale = r->si.quant;
1204 cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1205 r->cbp_luma [mb_pos] = cbp;
1206 r->cbp_chroma[mb_pos] = cbp >> 16;
1207 r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1208 s->current_picture_ptr->f.qscale_table[mb_pos] = s->qscale;
1209
1210 if(cbp == -1)
1211 return -1;
1212
1213 if (IS_INTRA(s->current_picture_ptr->f.mb_type[mb_pos])){
1214 if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1215 else rv34_output_intra(r, intra_types, cbp);
1216 return 0;
1217 }
1218
1219 if(r->is16){
1220 // Only for RV34_MB_P_MIX16x16
1221 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1222 memset(block16, 0, 16 * sizeof(*block16));
1223 q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1224 q_ac = rv34_qscale_tab[s->qscale];
1225 if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1226 r->rdsp.rv34_inv_transform(block16);
1227 else
1228 r->rdsp.rv34_inv_transform_dc(block16);
1229
1230 q_ac = rv34_qscale_tab[s->qscale];
1231
1232 for(j = 0; j < 4; j++){
1233 for(i = 0; i < 4; i++, cbp >>= 1){
1234 int dc = block16[i + j*4];
1235
1236 if(cbp & 1){
1237 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1238 }else
1239 has_ac = 0;
1240
1241 if(has_ac){
1242 ptr[0] = dc;
1243 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1244 }else
1245 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1246 }
1247
1248 dst += 4*s->linesize;
1249 }
1250
1251 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1252 }else{
1253 q_ac = rv34_qscale_tab[s->qscale];
1254
1255 for(j = 0; j < 4; j++){
1256 for(i = 0; i < 4; i++, cbp >>= 1){
1257 if(!(cbp & 1)) continue;
1258
1259 rv34_process_block(r, dst + 4*i, s->linesize,
1260 r->luma_vlc, 0, q_ac, q_ac);
1261 }
1262 dst += 4*s->linesize;
1263 }
1264 }
1265
1266 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1267 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1268
1269 for(j = 1; j < 3; j++){
1270 dst = s->dest[j];
1271 for(i = 0; i < 4; i++, cbp >>= 1){
1272 uint8_t *pdst;
1273 if(!(cbp & 1)) continue;
1274 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1275
1276 rv34_process_block(r, pdst, s->uvlinesize,
1277 r->chroma_vlc, 1, q_dc, q_ac);
1278 }
1279 }
1280
1281 return 0;
1282 }
1283
1284 static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1285 {
1286 MpegEncContext *s = &r->s;
1287 int cbp, dist;
1288 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1289
1290 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1291 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1292 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1293 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1294 if(s->mb_x && dist)
1295 r->avail_cache[5] =
1296 r->avail_cache[9] = s->current_picture_ptr->f.mb_type[mb_pos - 1];
1297 if(dist >= s->mb_width)
1298 r->avail_cache[2] =
1299 r->avail_cache[3] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride];
1300 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1301 r->avail_cache[4] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride + 1];
1302 if(s->mb_x && dist > s->mb_width)
1303 r->avail_cache[1] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride - 1];
1304
1305 s->qscale = r->si.quant;
1306 cbp = rv34_decode_intra_mb_header(r, intra_types);
1307 r->cbp_luma [mb_pos] = cbp;
1308 r->cbp_chroma[mb_pos] = cbp >> 16;
1309 r->deblock_coefs[mb_pos] = 0xFFFF;
1310 s->current_picture_ptr->f.qscale_table[mb_pos] = s->qscale;
1311
1312 if(cbp == -1)
1313 return -1;
1314
1315 if(r->is16){
1316 rv34_output_i16x16(r, intra_types, cbp);
1317 return 0;
1318 }
1319
1320 rv34_output_intra(r, intra_types, cbp);
1321 return 0;
1322 }
1323
1324 static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
1325 {
1326 int bits;
1327 if(s->mb_y >= s->mb_height)
1328 return 1;
1329 if(!s->mb_num_left)
1330 return 1;
1331 if(r->s.mb_skip_run > 1)
1332 return 0;
1333 bits = get_bits_left(&s->gb);
1334 if(bits < 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1335 return 1;
1336 return 0;
1337 }
1338
1339
1340 static void rv34_decoder_free(RV34DecContext *r)
1341 {
1342 av_freep(&r->intra_types_hist);
1343 r->intra_types = NULL;
1344 av_freep(&r->tmp_b_block_base);
1345 av_freep(&r->mb_type);
1346 av_freep(&r->cbp_luma);
1347 av_freep(&r->cbp_chroma);
1348 av_freep(&r->deblock_coefs);
1349 }
1350
1351
1352 static int rv34_decoder_alloc(RV34DecContext *r)
1353 {
1354 r->intra_types_stride = r->s.mb_width * 4 + 4;
1355
1356 r->cbp_chroma = av_malloc(r->s.mb_stride * r->s.mb_height *
1357 sizeof(*r->cbp_chroma));
1358 r->cbp_luma = av_malloc(r->s.mb_stride * r->s.mb_height *
1359 sizeof(*r->cbp_luma));
1360 r->deblock_coefs = av_malloc(r->s.mb_stride * r->s.mb_height *
1361 sizeof(*r->deblock_coefs));
1362 r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 *
1363 sizeof(*r->intra_types_hist));
1364 r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1365 sizeof(*r->mb_type));
1366
1367 if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1368 r->intra_types_hist && r->mb_type)) {
1369 rv34_decoder_free(r);
1370 return AVERROR(ENOMEM);
1371 }
1372
1373 r->intra_types = r->intra_types_hist + r->intra_types_stride * 4;
1374
1375 return 0;
1376 }
1377
1378
1379 static int rv34_decoder_realloc(RV34DecContext *r)
1380 {
1381 rv34_decoder_free(r);
1382 return rv34_decoder_alloc(r);
1383 }
1384
1385
1386 static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1387 {
1388 MpegEncContext *s = &r->s;
1389 GetBitContext *gb = &s->gb;
1390 int mb_pos, slice_type;
1391 int res;
1392
1393 init_get_bits(&r->s.gb, buf, buf_size*8);
1394 res = r->parse_slice_header(r, gb, &r->si);
1395 if(res < 0){
1396 av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1397 return -1;
1398 }
1399
1400 slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1401 if (slice_type != s->pict_type) {
1402 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1403 return AVERROR_INVALIDDATA;
1404 }
1405
1406 r->si.end = end;
1407 s->qscale = r->si.quant;
1408 s->mb_num_left = r->si.end - r->si.start;
1409 r->s.mb_skip_run = 0;
1410
1411 mb_pos = s->mb_x + s->mb_y * s->mb_width;
1412 if(r->si.start != mb_pos){
1413 av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1414 s->mb_x = r->si.start % s->mb_width;
1415 s->mb_y = r->si.start / s->mb_width;
1416 }
1417 memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1418 s->first_slice_line = 1;
1419 s->resync_mb_x = s->mb_x;
1420 s->resync_mb_y = s->mb_y;
1421
1422 ff_init_block_index(s);
1423 while(!check_slice_end(r, s)) {
1424 ff_update_block_index(s);
1425
1426 if(r->si.type)
1427 res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1428 else
1429 res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1430 if(res < 0){
1431 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1432 return -1;
1433 }
1434 if (++s->mb_x == s->mb_width) {
1435 s->mb_x = 0;
1436 s->mb_y++;
1437 ff_init_block_index(s);
1438
1439 memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1440 memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1441
1442 if(r->loop_filter && s->mb_y >= 2)
1443 r->loop_filter(r, s->mb_y - 2);
1444
1445 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1446 ff_thread_report_progress(&s->current_picture_ptr->f,
1447 s->mb_y - 2, 0);
1448
1449 }
1450 if(s->mb_x == s->resync_mb_x)
1451 s->first_slice_line=0;
1452 s->mb_num_left--;
1453 }
1454 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1455
1456 return s->mb_y == s->mb_height;
1457 }
1458
1459 /** @} */ // recons group end
1460
1461 /**
1462 * Initialize decoder.
1463 */
1464 av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
1465 {
1466 RV34DecContext *r = avctx->priv_data;
1467 MpegEncContext *s = &r->s;
1468 int ret;
1469
1470 ff_MPV_decode_defaults(s);
1471 s->avctx = avctx;
1472 s->out_format = FMT_H263;
1473 s->codec_id = avctx->codec_id;
1474
1475 s->width = avctx->width;
1476 s->height = avctx->height;
1477
1478 r->s.avctx = avctx;
1479 avctx->flags |= CODEC_FLAG_EMU_EDGE;
1480 r->s.flags |= CODEC_FLAG_EMU_EDGE;
1481 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1482 avctx->has_b_frames = 1;
1483 s->low_delay = 0;
1484
1485 if ((ret = ff_MPV_common_init(s)) < 0)
1486 return ret;
1487
1488 ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1489
1490 #if CONFIG_RV30_DECODER
1491 if (avctx->codec_id == AV_CODEC_ID_RV30)
1492 ff_rv30dsp_init(&r->rdsp);
1493 #endif
1494 #if CONFIG_RV40_DECODER
1495 if (avctx->codec_id == AV_CODEC_ID_RV40)
1496 ff_rv40dsp_init(&r->rdsp);
1497 #endif
1498
1499 if ((ret = rv34_decoder_alloc(r)) < 0)
1500 return ret;
1501
1502 if(!intra_vlcs[0].cbppattern[0].bits)
1503 rv34_init_tables();
1504
1505 return 0;
1506 }
1507
1508 int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
1509 {
1510 int err;
1511 RV34DecContext *r = avctx->priv_data;
1512
1513 r->s.avctx = avctx;
1514
1515 if (avctx->internal->is_copy) {
1516 r->tmp_b_block_base = NULL;
1517 if ((err = ff_MPV_common_init(&r->s)) < 0)
1518 return err;
1519 if ((err = rv34_decoder_alloc(r)) < 0)
1520 return err;
1521 }
1522 return 0;
1523 }
1524
1525 int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1526 {
1527 RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1528 MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1529 int err;
1530
1531 if (dst == src || !s1->context_initialized)
1532 return 0;
1533
1534 if (s->height != s1->height || s->width != s1->width) {
1535 s->height = s1->height;
1536 s->width = s1->width;
1537 if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1538 return err;
1539 if ((err = rv34_decoder_realloc(r)) < 0)
1540 return err;
1541 }
1542
1543 if ((err = ff_mpeg_update_thread_context(dst, src)))
1544 return err;
1545
1546 r->cur_pts = r1->cur_pts;
1547 r->last_pts = r1->last_pts;
1548 r->next_pts = r1->next_pts;
1549
1550 memset(&r->si, 0, sizeof(r->si));
1551
1552 return 0;
1553 }
1554
1555 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
1556 {
1557 if(avctx->slice_count) return avctx->slice_offset[n];
1558 else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1559 }
1560
1561 static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1562 {
1563 RV34DecContext *r = avctx->priv_data;
1564 MpegEncContext *s = &r->s;
1565 int got_picture = 0;
1566
1567 ff_er_frame_end(s);
1568 ff_MPV_frame_end(s);
1569 s->mb_num_left = 0;
1570
1571 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1572 ff_thread_report_progress(&s->current_picture_ptr->f, INT_MAX, 0);
1573
1574 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1575 *pict = s->current_picture_ptr->f;
1576 got_picture = 1;
1577 } else if (s->last_picture_ptr != NULL) {
1578 *pict = s->last_picture_ptr->f;
1579 got_picture = 1;
1580 }
1581 if (got_picture)
1582 ff_print_debug_info(s, pict);
1583
1584 return got_picture;
1585 }
1586
1587 int ff_rv34_decode_frame(AVCodecContext *avctx,
1588 void *data, int *got_picture_ptr,
1589 AVPacket *avpkt)
1590 {
1591 const uint8_t *buf = avpkt->data;
1592 int buf_size = avpkt->size;
1593 RV34DecContext *r = avctx->priv_data;
1594 MpegEncContext *s = &r->s;
1595 AVFrame *pict = data;
1596 SliceInfo si;
1597 int i;
1598 int slice_count;
1599 const uint8_t *slices_hdr = NULL;
1600 int last = 0;
1601
1602 /* no supplementary picture */
1603 if (buf_size == 0) {
1604 /* special case for last picture */
1605 if (s->low_delay==0 && s->next_picture_ptr) {
1606 *pict = s->next_picture_ptr->f;
1607 s->next_picture_ptr = NULL;
1608
1609 *got_picture_ptr = 1;
1610 }
1611 return 0;
1612 }
1613
1614 if(!avctx->slice_count){
1615 slice_count = (*buf++) + 1;
1616 slices_hdr = buf + 4;
1617 buf += 8 * slice_count;
1618 buf_size -= 1 + 8 * slice_count;
1619 }else
1620 slice_count = avctx->slice_count;
1621
1622 //parse first slice header to check whether this frame can be decoded
1623 if(get_slice_offset(avctx, slices_hdr, 0) < 0 ||
1624 get_slice_offset(avctx, slices_hdr, 0) > buf_size){
1625 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1626 return AVERROR_INVALIDDATA;
1627 }
1628 init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), (buf_size-get_slice_offset(avctx, slices_hdr, 0))*8);
1629 if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
1630 av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
1631 return AVERROR_INVALIDDATA;
1632 }
1633 if ((!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) &&
1634 si.type == AV_PICTURE_TYPE_B) {
1635 av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
1636 "reference data.\n");
1637 return AVERROR_INVALIDDATA;
1638 }
1639 if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
1640 || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
1641 || avctx->skip_frame >= AVDISCARD_ALL)
1642 return avpkt->size;
1643
1644 /* first slice */
1645 if (si.start == 0) {
1646 if (s->mb_num_left > 0) {
1647 av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.",
1648 s->mb_num_left);
1649 ff_er_frame_end(s);
1650 ff_MPV_frame_end(s);
1651 }
1652
1653 if (s->width != si.width || s->height != si.height) {
1654 int err;
1655
1656 av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1657 si.width, si.height);
1658
1659 s->width = si.width;
1660 s->height = si.height;
1661 avcodec_set_dimensions(s->avctx, s->width, s->height);
1662 if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1663 return err;
1664 if ((err = rv34_decoder_realloc(r)) < 0)
1665 return err;
1666 }
1667 s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1668 if (ff_MPV_frame_start(s, s->avctx) < 0)
1669 return -1;
1670 ff_er_frame_start(s);
1671 if (!r->tmp_b_block_base) {
1672 int i;
1673
1674 r->tmp_b_block_base = av_malloc(s->linesize * 48);
1675 for (i = 0; i < 2; i++)
1676 r->tmp_b_block_y[i] = r->tmp_b_block_base
1677 + i * 16 * s->linesize;
1678 for (i = 0; i < 4; i++)
1679 r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1680 + (i >> 1) * 8 * s->uvlinesize
1681 + (i & 1) * 16;
1682 }
1683 r->cur_pts = si.pts;
1684 if (s->pict_type != AV_PICTURE_TYPE_B) {
1685 r->last_pts = r->next_pts;
1686 r->next_pts = r->cur_pts;
1687 } else {
1688 int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1689 int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1690 int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1691
1692 if(!refdist){
1693 r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1694 r->scaled_weight = 0;
1695 }else{
1696 r->mv_weight1 = (dist0 << 14) / refdist;
1697 r->mv_weight2 = (dist1 << 14) / refdist;
1698 if((r->mv_weight1|r->mv_weight2) & 511){
1699 r->weight1 = r->mv_weight1;
1700 r->weight2 = r->mv_weight2;
1701 r->scaled_weight = 0;
1702 }else{
1703 r->weight1 = r->mv_weight1 >> 9;
1704 r->weight2 = r->mv_weight2 >> 9;
1705 r->scaled_weight = 1;
1706 }
1707 }
1708 }
1709 s->mb_x = s->mb_y = 0;
1710 ff_thread_finish_setup(s->avctx);
1711 } else if (HAVE_THREADS &&
1712 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1713 av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1714 "multithreading mode (start MB is %d).\n", si.start);
1715 return AVERROR_INVALIDDATA;
1716 }
1717
1718 for(i = 0; i < slice_count; i++){
1719 int offset = get_slice_offset(avctx, slices_hdr, i);
1720 int size;
1721 if(i+1 == slice_count)
1722 size = buf_size - offset;
1723 else
1724 size = get_slice_offset(avctx, slices_hdr, i+1) - offset;
1725
1726 if(offset < 0 || offset > buf_size){
1727 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1728 break;
1729 }
1730
1731 r->si.end = s->mb_width * s->mb_height;
1732 s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1733
1734 if(i+1 < slice_count){
1735 if (get_slice_offset(avctx, slices_hdr, i+1) < 0 ||
1736 get_slice_offset(avctx, slices_hdr, i+1) > buf_size) {
1737 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1738 break;
1739 }
1740 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);
1741 if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1742 if(i+2 < slice_count)
1743 size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1744 else
1745 size = buf_size - offset;
1746 }else
1747 r->si.end = si.start;
1748 }
1749 if (size < 0 || size > buf_size - offset) {
1750 av_log(avctx, AV_LOG_ERROR, "Slice size is invalid\n");
1751 break;
1752 }
1753 last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1754 if(last)
1755 break;
1756 }
1757
1758 if (s->current_picture_ptr) {
1759 if (last) {
1760 if(r->loop_filter)
1761 r->loop_filter(r, s->mb_height - 1);
1762
1763 *got_picture_ptr = finish_frame(avctx, pict);
1764 } else if (HAVE_THREADS &&
1765 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1766 av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1767 /* always mark the current frame as finished, frame-mt supports
1768 * only complete frames */
1769 ff_er_frame_end(s);
1770 ff_MPV_frame_end(s);
1771 s->mb_num_left = 0;
1772 ff_thread_report_progress(&s->current_picture_ptr->f, INT_MAX, 0);
1773 return AVERROR_INVALIDDATA;
1774 }
1775 }
1776
1777 return avpkt->size;
1778 }
1779
1780 av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
1781 {
1782 RV34DecContext *r = avctx->priv_data;
1783
1784 ff_MPV_common_end(&r->s);
1785 rv34_decoder_free(r);
1786
1787 return 0;
1788 }