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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / rv34.c
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2ba45a60
DM		 1/*
2 * RV30/40 decoder common data
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * RV30/40 decoder common data
25 */
26
27#include "libavutil/imgutils.h"
28#include "libavutil/internal.h"
29
30#include "avcodec.h"
31#include "error_resilience.h"
32#include "mpegutils.h"
33#include "mpegvideo.h"
34#include "golomb.h"
35#include "internal.h"
36#include "mathops.h"
37#include "mpeg_er.h"
38#include "qpeldsp.h"
39#include "rectangle.h"
40#include "thread.h"
41
42#include "rv34vlc.h"
43#include "rv34data.h"
44#include "rv34.h"
45
46static inline void ZERO8x2(void* dst, int stride)
47{
48 fill_rectangle(dst, 1, 2, stride, 0, 4);
49 fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
50}
51
52/** translation of RV30/40 macroblock types to lavc ones */
53static const int rv34_mb_type_to_lavc[12] = {
54 MB_TYPE_INTRA,
55 MB_TYPE_INTRA16x16 | MB_TYPE_SEPARATE_DC,
56 MB_TYPE_16x16 | MB_TYPE_L0,
57 MB_TYPE_8x8 | MB_TYPE_L0,
58 MB_TYPE_16x16 | MB_TYPE_L0,
59 MB_TYPE_16x16 | MB_TYPE_L1,
60 MB_TYPE_SKIP,
61 MB_TYPE_DIRECT2 | MB_TYPE_16x16,
62 MB_TYPE_16x8 | MB_TYPE_L0,
63 MB_TYPE_8x16 | MB_TYPE_L0,
64 MB_TYPE_16x16 | MB_TYPE_L0L1,
65 MB_TYPE_16x16 | MB_TYPE_L0 | MB_TYPE_SEPARATE_DC
66};
67
68
69static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
70
71static int rv34_decode_mv(RV34DecContext *r, int block_type);
72
73/**
74 * @name RV30/40 VLC generating functions
75 * @{
76 */
77
78static const int table_offs[] = {
79 0, 1818, 3622, 4144, 4698, 5234, 5804, 5868, 5900, 5932,
80 5996, 6252, 6316, 6348, 6380, 7674, 8944, 10274, 11668, 12250,
81 14060, 15846, 16372, 16962, 17512, 18148, 18180, 18212, 18244, 18308,
82 18564, 18628, 18660, 18692, 20036, 21314, 22648, 23968, 24614, 26384,
83 28190, 28736, 29366, 29938, 30608, 30640, 30672, 30704, 30768, 31024,
84 31088, 31120, 31184, 32570, 33898, 35236, 36644, 37286, 39020, 40802,
85 41368, 42052, 42692, 43348, 43380, 43412, 43444, 43476, 43604, 43668,
86 43700, 43732, 45100, 46430, 47778, 49160, 49802, 51550, 53340, 53972,
87 54648, 55348, 55994, 56122, 56154, 56186, 56218, 56346, 56410, 56442,
88 56474, 57878, 59290, 60636, 62036, 62682, 64460, 64524, 64588, 64716,
89 64844, 66076, 67466, 67978, 68542, 69064, 69648, 70296, 72010, 72074,
90 72138, 72202, 72330, 73572, 74936, 75454, 76030, 76566, 77176, 77822,
91 79582, 79646, 79678, 79742, 79870, 81180, 82536, 83064, 83672, 84242,
92 84934, 85576, 87384, 87448, 87480, 87544, 87672, 88982, 90340, 90902,
93 91598, 92182, 92846, 93488, 95246, 95278, 95310, 95374, 95502, 96878,
94 98266, 98848, 99542, 100234, 100884, 101524, 103320, 103352, 103384, 103416,
95 103480, 104874, 106222, 106910, 107584, 108258, 108902, 109544, 111366, 111398,
96 111430, 111462, 111494, 112878, 114320, 114988, 115660, 116310, 116950, 117592
97};
98
99static VLC_TYPE table_data[117592][2];
100
101/**
102 * Generate VLC from codeword lengths.
103 * @param bits codeword lengths (zeroes are accepted)
104 * @param size length of input data
105 * @param vlc output VLC
106 * @param insyms symbols for input codes (NULL for default ones)
107 * @param num VLC table number (for static initialization)
108 */
109static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms,
110 const int num)
111{
112 int i;
113 int counts[17] = {0}, codes[17];
114 uint16_t cw[MAX_VLC_SIZE], syms[MAX_VLC_SIZE];
115 uint8_t bits2[MAX_VLC_SIZE];
116 int maxbits = 0, realsize = 0;
117
118 for(i = 0; i < size; i++){
119 if(bits[i]){
120 bits2[realsize] = bits[i];
121 syms[realsize] = insyms ? insyms[i] : i;
122 realsize++;
123 maxbits = FFMAX(maxbits, bits[i]);
124 counts[bits[i]]++;
125 }
126 }
127
128 codes[0] = 0;
129 for(i = 0; i < 16; i++)
130 codes[i+1] = (codes[i] + counts[i]) << 1;
131 for(i = 0; i < realsize; i++)
132 cw[i] = codes[bits2[i]]++;
133
134 vlc->table = &table_data[table_offs[num]];
135 vlc->table_allocated = table_offs[num + 1] - table_offs[num];
136 ff_init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize,
137 bits2, 1, 1,
138 cw, 2, 2,
139 syms, 2, 2, INIT_VLC_USE_NEW_STATIC);
140}
141
142/**
143 * Initialize all tables.
144 */
145static av_cold void rv34_init_tables(void)
146{
147 int i, j, k;
148
149 for(i = 0; i < NUM_INTRA_TABLES; i++){
150 for(j = 0; j < 2; j++){
151 rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE, &intra_vlcs[i].cbppattern[j], NULL, 19*i + 0 + j);
152 rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL, 19*i + 2 + j);
153 rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL, 19*i + 4 + j);
154 for(k = 0; k < 4; k++){
155 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);
156 }
157 }
158 for(j = 0; j < 4; j++){
159 rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE, &intra_vlcs[i].first_pattern[j], NULL, 19*i + 14 + j);
160 }
161 rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18);
162 }
163
164 for(i = 0; i < NUM_INTER_TABLES; i++){
165 rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL, i*12 + 95);
166 for(j = 0; j < 4; j++){
167 rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE, &inter_vlcs[i].cbp[0][j], rv34_cbp_code, i*12 + 96 + j);
168 }
169 for(j = 0; j < 2; j++){
170 rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE, &inter_vlcs[i].first_pattern[j], NULL, i*12 + 100 + j);
171 rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL, i*12 + 102 + j);
172 rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL, i*12 + 104 + j);
173 }
174 rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106);
175 }
176}
177
178/** @} */ // vlc group
179
180/**
181 * @name RV30/40 4x4 block decoding functions
182 * @{
183 */
184
185/**
186 * Decode coded block pattern.
187 */
188static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
189{
190 int pattern, code, cbp=0;
191 int ones;
192 static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
193 static const int shifts[4] = { 0, 2, 8, 10 };
194 const int *curshift = shifts;
195 int i, t, mask;
196
197 code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
198 pattern = code & 0xF;
199 code >>= 4;
200
201 ones = rv34_count_ones[pattern];
202
203 for(mask = 8; mask; mask >>= 1, curshift++){
204 if(pattern & mask)
205 cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
206 }
207
208 for(i = 0; i < 4; i++){
209 t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
210 if(t == 1)
211 cbp |= cbp_masks[get_bits1(gb)] << i;
212 if(t == 2)
213 cbp |= cbp_masks[2] << i;
214 }
215 return cbp;
216}
217
218/**
219 * Get one coefficient value from the bitstream and store it.
220 */
221static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
222{
223 if(coef){
224 if(coef == esc){
225 coef = get_vlc2(gb, vlc->table, 9, 2);
226 if(coef > 23){
227 coef -= 23;
228 coef = 22 + ((1 << coef) | get_bits(gb, coef));
229 }
230 coef += esc;
231 }
232 if(get_bits1(gb))
233 coef = -coef;
234 *dst = (coef*q + 8) >> 4;
235 }
236}
237
238/**
239 * Decode 2x2 subblock of coefficients.
240 */
241static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
242{
243 int flags = modulo_three_table[code];
244
245 decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
246 if(is_block2){
247 decode_coeff(dst+1*4+0, (flags >> 4) & 3, 2, gb, vlc, q);
248 decode_coeff(dst+0*4+1, (flags >> 2) & 3, 2, gb, vlc, q);
249 }else{
250 decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q);
251 decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q);
252 }
253 decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
254}
255
256/**
257 * Decode a single coefficient.
258 */
259static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
260{
261 int coeff = modulo_three_table[code] >> 6;
262 decode_coeff(dst, coeff, 3, gb, vlc, q);
263}
264
265static inline void decode_subblock3(int16_t *dst, int code, GetBitContext *gb, VLC *vlc,
266 int q_dc, int q_ac1, int q_ac2)
267{
268 int flags = modulo_three_table[code];
269
270 decode_coeff(dst+0*4+0, (flags >> 6) , 3, gb, vlc, q_dc);
271 decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
272 decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
273 decode_coeff(dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
274}
275
276/**
277 * Decode coefficients for 4x4 block.
278 *
279 * This is done by filling 2x2 subblocks with decoded coefficients
280 * in this order (the same for subblocks and subblock coefficients):
281 * o--o
282 * /
283 * /
284 * o--o
285 */
286
287static int rv34_decode_block(int16_t *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
288{
289 int code, pattern, has_ac = 1;
290
291 code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
292
293 pattern = code & 0x7;
294
295 code >>= 3;
296
297 if (modulo_three_table[code] & 0x3F) {
298 decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
299 } else {
300 decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
301 if (!pattern)
302 return 0;
303 has_ac = 0;
304 }
305
306 if(pattern & 4){
307 code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
308 decode_subblock(dst + 4*0+2, code, 0, gb, &rvlc->coefficient, q_ac2);
309 }
310 if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
311 code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
312 decode_subblock(dst + 4*2+0, code, 1, gb, &rvlc->coefficient, q_ac2);
313 }
314 if(pattern & 1){
315 code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
316 decode_subblock(dst + 4*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
317 }
318 return has_ac | pattern;
319}
320
321/**
322 * @name RV30/40 bitstream parsing
323 * @{
324 */
325
326/**
327 * Decode starting slice position.
328 * @todo Maybe replace with ff_h263_decode_mba() ?
329 */
330int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
331{
332 int i;
333 for(i = 0; i < 5; i++)
334 if(rv34_mb_max_sizes[i] >= mb_size - 1)
335 break;
336 return rv34_mb_bits_sizes[i];
337}
338
339/**
340 * Select VLC set for decoding from current quantizer, modifier and frame type.
341 */
342static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
343{
344 if(mod == 2 && quant < 19) quant += 10;
345 else if(mod && quant < 26) quant += 5;
346 return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]]
347 : &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]];
348}
349
350/**
351 * Decode intra macroblock header and return CBP in case of success, -1 otherwise.
352 */
353static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
354{
355 MpegEncContext *s = &r->s;
356 GetBitContext *gb = &s->gb;
357 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
358 int t;
359
360 r->is16 = get_bits1(gb);
361 if(r->is16){
362 s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA16x16;
363 r->block_type = RV34_MB_TYPE_INTRA16x16;
364 t = get_bits(gb, 2);
365 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
366 r->luma_vlc = 2;
367 }else{
368 if(!r->rv30){
369 if(!get_bits1(gb))
370 av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
371 }
372 s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA;
373 r->block_type = RV34_MB_TYPE_INTRA;
374 if(r->decode_intra_types(r, gb, intra_types) < 0)
375 return -1;
376 r->luma_vlc = 1;
377 }
378
379 r->chroma_vlc = 0;
380 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
381
382 return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
383}
384
385/**
386 * Decode inter macroblock header and return CBP in case of success, -1 otherwise.
387 */
388static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
389{
390 MpegEncContext *s = &r->s;
391 GetBitContext *gb = &s->gb;
392 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
393 int i, t;
394
395 r->block_type = r->decode_mb_info(r);
396 if(r->block_type == -1)
397 return -1;
398 s->current_picture_ptr->mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type];
399 r->mb_type[mb_pos] = r->block_type;
400 if(r->block_type == RV34_MB_SKIP){
401 if(s->pict_type == AV_PICTURE_TYPE_P)
402 r->mb_type[mb_pos] = RV34_MB_P_16x16;
403 if(s->pict_type == AV_PICTURE_TYPE_B)
404 r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
405 }
406 r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
407 rv34_decode_mv(r, r->block_type);
408 if(r->block_type == RV34_MB_SKIP){
409 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0]));
410 return 0;
411 }
412 r->chroma_vlc = 1;
413 r->luma_vlc = 0;
414
415 if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
416 if(r->is16){
417 t = get_bits(gb, 2);
418 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
419 r->luma_vlc = 2;
420 }else{
421 if(r->decode_intra_types(r, gb, intra_types) < 0)
422 return -1;
423 r->luma_vlc = 1;
424 }
425 r->chroma_vlc = 0;
426 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
427 }else{
428 for(i = 0; i < 16; i++)
429 intra_types[(i & 3) + (i>>2) * r->intra_types_stride] = 0;
430 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
431 if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){
432 r->is16 = 1;
433 r->chroma_vlc = 1;
434 r->luma_vlc = 2;
435 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
436 }
437 }
438
439 return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
440}
441
442/** @} */ //bitstream functions
443
444/**
445 * @name motion vector related code (prediction, reconstruction, motion compensation)
446 * @{
447 */
448
449/** macroblock partition width in 8x8 blocks */
450static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
451
452/** macroblock partition height in 8x8 blocks */
453static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
454
455/** availability index for subblocks */
456static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
457
458/**
459 * motion vector prediction
460 *
461 * Motion prediction performed for the block by using median prediction of
462 * motion vectors from the left, top and right top blocks but in corner cases
463 * some other vectors may be used instead.
464 */
465static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
466{
467 MpegEncContext *s = &r->s;
468 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
469 int A[2] = {0}, B[2], C[2];
470 int i, j;
471 int mx, my;
472 int* avail = r->avail_cache + avail_indexes[subblock_no];
473 int c_off = part_sizes_w[block_type];
474
475 mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
476 if(subblock_no == 3)
477 c_off = -1;
478
479 if(avail[-1]){
480 A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
481 A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
482 }
483 if(avail[-4]){
484 B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
485 B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
486 }else{
487 B[0] = A[0];
488 B[1] = A[1];
489 }
490 if(!avail[c_off-4]){
491 if(avail[-4] && (avail[-1] || r->rv30)){
492 C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
493 C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
494 }else{
495 C[0] = A[0];
496 C[1] = A[1];
497 }
498 }else{
499 C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
500 C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
501 }
502 mx = mid_pred(A[0], B[0], C[0]);
503 my = mid_pred(A[1], B[1], C[1]);
504 mx += r->dmv[dmv_no][0];
505 my += r->dmv[dmv_no][1];
506 for(j = 0; j < part_sizes_h[block_type]; j++){
507 for(i = 0; i < part_sizes_w[block_type]; i++){
508 s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
509 s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
510 }
511 }
512}
513
514#define GET_PTS_DIFF(a, b) (((a) - (b) + 8192) & 0x1FFF)
515
516/**
517 * Calculate motion vector component that should be added for direct blocks.
518 */
519static int calc_add_mv(RV34DecContext *r, int dir, int val)
520{
521 int mul = dir ? -r->mv_weight2 : r->mv_weight1;
522
523 return (val * mul + 0x2000) >> 14;
524}
525
526/**
527 * Predict motion vector for B-frame macroblock.
528 */
529static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2],
530 int A_avail, int B_avail, int C_avail,
531 int *mx, int *my)
532{
533 if(A_avail + B_avail + C_avail != 3){
534 *mx = A[0] + B[0] + C[0];
535 *my = A[1] + B[1] + C[1];
536 if(A_avail + B_avail + C_avail == 2){
537 *mx /= 2;
538 *my /= 2;
539 }
540 }else{
541 *mx = mid_pred(A[0], B[0], C[0]);
542 *my = mid_pred(A[1], B[1], C[1]);
543 }
544}
545
546/**
547 * motion vector prediction for B-frames
548 */
549static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
550{
551 MpegEncContext *s = &r->s;
552 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
553 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
554 int A[2] = { 0 }, B[2] = { 0 }, C[2] = { 0 };
555 int has_A = 0, has_B = 0, has_C = 0;
556 int mx, my;
557 int i, j;
558 Picture *cur_pic = s->current_picture_ptr;
559 const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
560 int type = cur_pic->mb_type[mb_pos];
561
562 if((r->avail_cache[6-1] & type) & mask){
563 A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
564 A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
565 has_A = 1;
566 }
567 if((r->avail_cache[6-4] & type) & mask){
568 B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
569 B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
570 has_B = 1;
571 }
572 if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){
573 C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
574 C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
575 has_C = 1;
576 }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){
577 C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
578 C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
579 has_C = 1;
580 }
581
582 rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
583
584 mx += r->dmv[dir][0];
585 my += r->dmv[dir][1];
586
587 for(j = 0; j < 2; j++){
588 for(i = 0; i < 2; i++){
589 cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
590 cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
591 }
592 }
593 if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD){
594 ZERO8x2(cur_pic->motion_val[!dir][mv_pos], s->b8_stride);
595 }
596}
597
598/**
599 * motion vector prediction - RV3 version
600 */
601static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir)
602{
603 MpegEncContext *s = &r->s;
604 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
605 int A[2] = {0}, B[2], C[2];
606 int i, j, k;
607 int mx, my;
608 int* avail = r->avail_cache + avail_indexes[0];
609
610 if(avail[-1]){
611 A[0] = s->current_picture_ptr->motion_val[0][mv_pos - 1][0];
612 A[1] = s->current_picture_ptr->motion_val[0][mv_pos - 1][1];
613 }
614 if(avail[-4]){
615 B[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][0];
616 B[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][1];
617 }else{
618 B[0] = A[0];
619 B[1] = A[1];
620 }
621 if(!avail[-4 + 2]){
622 if(avail[-4] && (avail[-1])){
623 C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][0];
624 C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][1];
625 }else{
626 C[0] = A[0];
627 C[1] = A[1];
628 }
629 }else{
630 C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][0];
631 C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][1];
632 }
633 mx = mid_pred(A[0], B[0], C[0]);
634 my = mid_pred(A[1], B[1], C[1]);
635 mx += r->dmv[0][0];
636 my += r->dmv[0][1];
637 for(j = 0; j < 2; j++){
638 for(i = 0; i < 2; i++){
639 for(k = 0; k < 2; k++){
640 s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
641 s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my;
642 }
643 }
644 }
645}
646
647static const int chroma_coeffs[3] = { 0, 3, 5 };
648
649/**
650 * generic motion compensation function
651 *
652 * @param r decoder context
653 * @param block_type type of the current block
654 * @param xoff horizontal offset from the start of the current block
655 * @param yoff vertical offset from the start of the current block
656 * @param mv_off offset to the motion vector information
657 * @param width width of the current partition in 8x8 blocks
658 * @param height height of the current partition in 8x8 blocks
659 * @param dir motion compensation direction (i.e. from the last or the next reference frame)
660 * @param thirdpel motion vectors are specified in 1/3 of pixel
661 * @param qpel_mc a set of functions used to perform luma motion compensation
662 * @param chroma_mc a set of functions used to perform chroma motion compensation
663 */
664static inline void rv34_mc(RV34DecContext *r, const int block_type,
665 const int xoff, const int yoff, int mv_off,
666 const int width, const int height, int dir,
667 const int thirdpel, int weighted,
668 qpel_mc_func (*qpel_mc)[16],
669 h264_chroma_mc_func (*chroma_mc))
670{
671 MpegEncContext *s = &r->s;
672 uint8_t *Y, *U, *V, *srcY, *srcU, *srcV;
673 int dxy, mx, my, umx, umy, lx, ly, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
674 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off;
675 int is16x16 = 1;
676 int emu = 0;
677
678 if(thirdpel){
679 int chroma_mx, chroma_my;
680 mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
681 my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
682 lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
683 ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
684 chroma_mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
685 chroma_my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
686 umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
687 umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
688 uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];
689 uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3];
690 }else{
691 int cx, cy;
692 mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
693 my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
694 lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3;
695 ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3;
696 cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
697 cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
698 umx = cx >> 2;
699 umy = cy >> 2;
700 uvmx = (cx & 3) << 1;
701 uvmy = (cy & 3) << 1;
702 //due to some flaw RV40 uses the same MC compensation routine for H2V2 and H3V3
703 if(uvmx == 6 && uvmy == 6)
704 uvmx = uvmy = 4;
705 }
706
707 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
708 /* wait for the referenced mb row to be finished */
709 int mb_row = s->mb_y + ((yoff + my + 5 + 8 * height) >> 4);
710 ThreadFrame *f = dir ? &s->next_picture_ptr->tf : &s->last_picture_ptr->tf;
711 ff_thread_await_progress(f, mb_row, 0);
712 }
713
714 dxy = ly*4 + lx;
715 srcY = dir ? s->next_picture_ptr->f->data[0] : s->last_picture_ptr->f->data[0];
716 srcU = dir ? s->next_picture_ptr->f->data[1] : s->last_picture_ptr->f->data[1];
717 srcV = dir ? s->next_picture_ptr->f->data[2] : s->last_picture_ptr->f->data[2];
718 src_x = s->mb_x * 16 + xoff + mx;
719 src_y = s->mb_y * 16 + yoff + my;
720 uvsrc_x = s->mb_x * 8 + (xoff >> 1) + umx;
721 uvsrc_y = s->mb_y * 8 + (yoff >> 1) + umy;
722 srcY += src_y * s->linesize + src_x;
723 srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
724 srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
725 if(s->h_edge_pos - (width << 3) < 6 || s->v_edge_pos - (height << 3) < 6 ||
726 (unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 4 ||
727 (unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 4) {
728 srcY -= 2 + 2*s->linesize;
729 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
730 s->linesize, s->linesize,
731 (width << 3) + 6, (height << 3) + 6,
732 src_x - 2, src_y - 2,
733 s->h_edge_pos, s->v_edge_pos);
734 srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
735 emu = 1;
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 if (emu) {
759 uint8_t *uvbuf = s->edge_emu_buffer;
760
761 s->vdsp.emulated_edge_mc(uvbuf, srcU,
762 s->uvlinesize, s->uvlinesize,
763 (width << 2) + 1, (height << 2) + 1,
764 uvsrc_x, uvsrc_y,
765 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
766 srcU = uvbuf;
767 uvbuf += 9*s->uvlinesize;
768
769 s->vdsp.emulated_edge_mc(uvbuf, srcV,
770 s->uvlinesize, s->uvlinesize,
771 (width << 2) + 1, (height << 2) + 1,
772 uvsrc_x, uvsrc_y,
773 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
774 srcV = uvbuf;
775 }
776 chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
777 chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
778}
779
780static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
781 const int xoff, const int yoff, int mv_off,
782 const int width, const int height, int dir)
783{
784 rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
785 r->rdsp.put_pixels_tab,
786 r->rdsp.put_chroma_pixels_tab);
787}
788
789static void rv4_weight(RV34DecContext *r)
790{
791 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][0](r->s.dest[0],
792 r->tmp_b_block_y[0],
793 r->tmp_b_block_y[1],
794 r->weight1,
795 r->weight2,
796 r->s.linesize);
797 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[1],
798 r->tmp_b_block_uv[0],
799 r->tmp_b_block_uv[2],
800 r->weight1,
801 r->weight2,
802 r->s.uvlinesize);
803 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[2],
804 r->tmp_b_block_uv[1],
805 r->tmp_b_block_uv[3],
806 r->weight1,
807 r->weight2,
808 r->s.uvlinesize);
809}
810
811static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
812{
813 int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
814
815 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
816 r->rdsp.put_pixels_tab,
817 r->rdsp.put_chroma_pixels_tab);
818 if(!weighted){
819 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
820 r->rdsp.avg_pixels_tab,
821 r->rdsp.avg_chroma_pixels_tab);
822 }else{
823 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
824 r->rdsp.put_pixels_tab,
825 r->rdsp.put_chroma_pixels_tab);
826 rv4_weight(r);
827 }
828}
829
830static void rv34_mc_2mv_skip(RV34DecContext *r)
831{
832 int i, j;
833 int weighted = !r->rv30 && r->weight1 != 8192;
834
835 for(j = 0; j < 2; j++)
836 for(i = 0; i < 2; i++){
837 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
838 weighted,
839 r->rdsp.put_pixels_tab,
840 r->rdsp.put_chroma_pixels_tab);
841 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
842 weighted,
843 weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
844 weighted ? r->rdsp.put_chroma_pixels_tab : r->rdsp.avg_chroma_pixels_tab);
845 }
846 if(weighted)
847 rv4_weight(r);
848}
849
850/** number of motion vectors in each macroblock type */
851static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
852
853/**
854 * Decode motion vector differences
855 * and perform motion vector reconstruction and motion compensation.
856 */
857static int rv34_decode_mv(RV34DecContext *r, int block_type)
858{
859 MpegEncContext *s = &r->s;
860 GetBitContext *gb = &s->gb;
861 int i, j, k, l;
862 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
863 int next_bt;
864
865 memset(r->dmv, 0, sizeof(r->dmv));
866 for(i = 0; i < num_mvs[block_type]; i++){
867 r->dmv[i][0] = svq3_get_se_golomb(gb);
868 r->dmv[i][1] = svq3_get_se_golomb(gb);
869 }
870 switch(block_type){
871 case RV34_MB_TYPE_INTRA:
872 case RV34_MB_TYPE_INTRA16x16:
873 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
874 return 0;
875 case RV34_MB_SKIP:
876 if(s->pict_type == AV_PICTURE_TYPE_P){
877 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
878 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
879 break;
880 }
881 case RV34_MB_B_DIRECT:
882 //surprisingly, it uses motion scheme from next reference frame
883 /* wait for the current mb row to be finished */
884 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
885 ff_thread_await_progress(&s->next_picture_ptr->tf, FFMAX(0, s->mb_y-1), 0);
886
887 next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
888 if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
889 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
890 ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
891 }else
892 for(j = 0; j < 2; j++)
893 for(i = 0; i < 2; i++)
894 for(k = 0; k < 2; k++)
895 for(l = 0; l < 2; l++)
896 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]);
897 if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
898 rv34_mc_2mv(r, block_type);
899 else
900 rv34_mc_2mv_skip(r);
901 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
902 break;
903 case RV34_MB_P_16x16:
904 case RV34_MB_P_MIX16x16:
905 rv34_pred_mv(r, block_type, 0, 0);
906 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
907 break;
908 case RV34_MB_B_FORWARD:
909 case RV34_MB_B_BACKWARD:
910 r->dmv[1][0] = r->dmv[0][0];
911 r->dmv[1][1] = r->dmv[0][1];
912 if(r->rv30)
913 rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
914 else
915 rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
916 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
917 break;
918 case RV34_MB_P_16x8:
919 case RV34_MB_P_8x16:
920 rv34_pred_mv(r, block_type, 0, 0);
921 rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
922 if(block_type == RV34_MB_P_16x8){
923 rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
924 rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
925 }
926 if(block_type == RV34_MB_P_8x16){
927 rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
928 rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
929 }
930 break;
931 case RV34_MB_B_BIDIR:
932 rv34_pred_mv_b (r, block_type, 0);
933 rv34_pred_mv_b (r, block_type, 1);
934 rv34_mc_2mv (r, block_type);
935 break;
936 case RV34_MB_P_8x8:
937 for(i=0;i< 4;i++){
938 rv34_pred_mv(r, block_type, i, i);
939 rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
940 }
941 break;
942 }
943
944 return 0;
945}
946/** @} */ // mv group
947
948/**
949 * @name Macroblock reconstruction functions
950 * @{
951 */
952/** mapping of RV30/40 intra prediction types to standard H.264 types */
953static const int ittrans[9] = {
954 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
955 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
956};
957
958/** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
959static const int ittrans16[4] = {
960 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
961};
962
963/**
964 * Perform 4x4 intra prediction.
965 */
966static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
967{
968 uint8_t *prev = dst - stride + 4;
969 uint32_t topleft;
970
971 if(!up && !left)
972 itype = DC_128_PRED;
973 else if(!up){
974 if(itype == VERT_PRED) itype = HOR_PRED;
975 if(itype == DC_PRED) itype = LEFT_DC_PRED;
976 }else if(!left){
977 if(itype == HOR_PRED) itype = VERT_PRED;
978 if(itype == DC_PRED) itype = TOP_DC_PRED;
979 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
980 }
981 if(!down){
982 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
983 if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
984 if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
985 }
986 if(!right && up){
987 topleft = dst[-stride + 3] * 0x01010101u;
988 prev = (uint8_t*)&topleft;
989 }
990 r->h.pred4x4[itype](dst, prev, stride);
991}
992
993static inline int adjust_pred16(int itype, int up, int left)
994{
995 if(!up && !left)
996 itype = DC_128_PRED8x8;
997 else if(!up){
998 if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
999 if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
1000 if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
1001 }else if(!left){
1002 if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
1003 if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
1004 if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
1005 }
1006 return itype;
1007}
1008
1009static inline void rv34_process_block(RV34DecContext *r,
1010 uint8_t *pdst, int stride,
1011 int fc, int sc, int q_dc, int q_ac)
1012{
1013 MpegEncContext *s = &r->s;
1014 int16_t *ptr = s->block[0];
1015 int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
1016 fc, sc, q_dc, q_ac, q_ac);
1017 if(has_ac){
1018 r->rdsp.rv34_idct_add(pdst, stride, ptr);
1019 }else{
1020 r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1021 ptr[0] = 0;
1022 }
1023}
1024
1025static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1026{
1027 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1028 MpegEncContext *s = &r->s;
1029 GetBitContext *gb = &s->gb;
1030 int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1031 q_ac = rv34_qscale_tab[s->qscale];
1032 uint8_t *dst = s->dest[0];
1033 int16_t *ptr = s->block[0];
1034 int i, j, itype, has_ac;
1035
1036 memset(block16, 0, 16 * sizeof(*block16));
1037
1038 has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1039 if(has_ac)
1040 r->rdsp.rv34_inv_transform(block16);
1041 else
1042 r->rdsp.rv34_inv_transform_dc(block16);
1043
1044 itype = ittrans16[intra_types[0]];
1045 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1046 r->h.pred16x16[itype](dst, s->linesize);
1047
1048 for(j = 0; j < 4; j++){
1049 for(i = 0; i < 4; i++, cbp >>= 1){
1050 int dc = block16[i + j*4];
1051
1052 if(cbp & 1){
1053 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1054 }else
1055 has_ac = 0;
1056
1057 if(has_ac){
1058 ptr[0] = dc;
1059 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1060 }else
1061 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1062 }
1063
1064 dst += 4*s->linesize;
1065 }
1066
1067 itype = ittrans16[intra_types[0]];
1068 if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1069 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1070
1071 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1072 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1073
1074 for(j = 1; j < 3; j++){
1075 dst = s->dest[j];
1076 r->h.pred8x8[itype](dst, s->uvlinesize);
1077 for(i = 0; i < 4; i++, cbp >>= 1){
1078 uint8_t *pdst;
1079 if(!(cbp & 1)) continue;
1080 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1081
1082 rv34_process_block(r, pdst, s->uvlinesize,
1083 r->chroma_vlc, 1, q_dc, q_ac);
1084 }
1085 }
1086}
1087
1088static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1089{
1090 MpegEncContext *s = &r->s;
1091 uint8_t *dst = s->dest[0];
1092 int avail[6*8] = {0};
1093 int i, j, k;
1094 int idx, q_ac, q_dc;
1095
1096 // Set neighbour information.
1097 if(r->avail_cache[1])
1098 avail[0] = 1;
1099 if(r->avail_cache[2])
1100 avail[1] = avail[2] = 1;
1101 if(r->avail_cache[3])
1102 avail[3] = avail[4] = 1;
1103 if(r->avail_cache[4])
1104 avail[5] = 1;
1105 if(r->avail_cache[5])
1106 avail[8] = avail[16] = 1;
1107 if(r->avail_cache[9])
1108 avail[24] = avail[32] = 1;
1109
1110 q_ac = rv34_qscale_tab[s->qscale];
1111 for(j = 0; j < 4; j++){
1112 idx = 9 + j*8;
1113 for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1114 rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1115 avail[idx] = 1;
1116 if(!(cbp & 1)) continue;
1117
1118 rv34_process_block(r, dst, s->linesize,
1119 r->luma_vlc, 0, q_ac, q_ac);
1120 }
1121 dst += s->linesize * 4 - 4*4;
1122 intra_types += r->intra_types_stride;
1123 }
1124
1125 intra_types -= r->intra_types_stride * 4;
1126
1127 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1128 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1129
1130 for(k = 0; k < 2; k++){
1131 dst = s->dest[1+k];
1132 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1133
1134 for(j = 0; j < 2; j++){
1135 int* acache = r->avail_cache + 6 + j*4;
1136 for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1137 int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1138 rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1139 acache[0] = 1;
1140
1141 if(!(cbp&1)) continue;
1142
1143 rv34_process_block(r, dst + 4*i, s->uvlinesize,
1144 r->chroma_vlc, 1, q_dc, q_ac);
1145 }
1146
1147 dst += 4*s->uvlinesize;
1148 }
1149 }
1150}
1151
1152static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1153{
1154 int d;
1155 d = motion_val[0][0] - motion_val[-step][0];
1156 if(d < -3 || d > 3)
1157 return 1;
1158 d = motion_val[0][1] - motion_val[-step][1];
1159 if(d < -3 || d > 3)
1160 return 1;
1161 return 0;
1162}
1163
1164static int rv34_set_deblock_coef(RV34DecContext *r)
1165{
1166 MpegEncContext *s = &r->s;
1167 int hmvmask = 0, vmvmask = 0, i, j;
1168 int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1169 int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
1170 for(j = 0; j < 16; j += 8){
1171 for(i = 0; i < 2; i++){
1172 if(is_mv_diff_gt_3(motion_val + i, 1))
1173 vmvmask |= 0x11 << (j + i*2);
1174 if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1175 hmvmask |= 0x03 << (j + i*2);
1176 }
1177 motion_val += s->b8_stride;
1178 }
1179 if(s->first_slice_line)
1180 hmvmask &= ~0x000F;
1181 if(!s->mb_x)
1182 vmvmask &= ~0x1111;
1183 if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1184 vmvmask |= (vmvmask & 0x4444) >> 1;
1185 hmvmask |= (hmvmask & 0x0F00) >> 4;
1186 if(s->mb_x)
1187 r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1188 if(!s->first_slice_line)
1189 r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1190 }
1191 return hmvmask | vmvmask;
1192}
1193
1194static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1195{
1196 MpegEncContext *s = &r->s;
1197 GetBitContext *gb = &s->gb;
1198 uint8_t *dst = s->dest[0];
1199 int16_t *ptr = s->block[0];
1200 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1201 int cbp, cbp2;
1202 int q_dc, q_ac, has_ac;
1203 int i, j;
1204 int dist;
1205
1206 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1207 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1208 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1209 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1210 if(s->mb_x && dist)
1211 r->avail_cache[5] =
1212 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1213 if(dist >= s->mb_width)
1214 r->avail_cache[2] =
1215 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1216 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1217 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1218 if(s->mb_x && dist > s->mb_width)
1219 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1220
1221 s->qscale = r->si.quant;
1222 cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1223 r->cbp_luma [mb_pos] = cbp;
1224 r->cbp_chroma[mb_pos] = cbp >> 16;
1225 r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1226 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1227
1228 if(cbp == -1)
1229 return -1;
1230
1231 if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
1232 if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1233 else rv34_output_intra(r, intra_types, cbp);
1234 return 0;
1235 }
1236
1237 if(r->is16){
1238 // Only for RV34_MB_P_MIX16x16
1239 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1240 memset(block16, 0, 16 * sizeof(*block16));
1241 q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1242 q_ac = rv34_qscale_tab[s->qscale];
1243 if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1244 r->rdsp.rv34_inv_transform(block16);
1245 else
1246 r->rdsp.rv34_inv_transform_dc(block16);
1247
1248 q_ac = rv34_qscale_tab[s->qscale];
1249
1250 for(j = 0; j < 4; j++){
1251 for(i = 0; i < 4; i++, cbp >>= 1){
1252 int dc = block16[i + j*4];
1253
1254 if(cbp & 1){
1255 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1256 }else
1257 has_ac = 0;
1258
1259 if(has_ac){
1260 ptr[0] = dc;
1261 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1262 }else
1263 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1264 }
1265
1266 dst += 4*s->linesize;
1267 }
1268
1269 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1270 }else{
1271 q_ac = rv34_qscale_tab[s->qscale];
1272
1273 for(j = 0; j < 4; j++){
1274 for(i = 0; i < 4; i++, cbp >>= 1){
1275 if(!(cbp & 1)) continue;
1276
1277 rv34_process_block(r, dst + 4*i, s->linesize,
1278 r->luma_vlc, 0, q_ac, q_ac);
1279 }
1280 dst += 4*s->linesize;
1281 }
1282 }
1283
1284 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1285 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1286
1287 for(j = 1; j < 3; j++){
1288 dst = s->dest[j];
1289 for(i = 0; i < 4; i++, cbp >>= 1){
1290 uint8_t *pdst;
1291 if(!(cbp & 1)) continue;
1292 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1293
1294 rv34_process_block(r, pdst, s->uvlinesize,
1295 r->chroma_vlc, 1, q_dc, q_ac);
1296 }
1297 }
1298
1299 return 0;
1300}
1301
1302static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1303{
1304 MpegEncContext *s = &r->s;
1305 int cbp, dist;
1306 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1307
1308 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1309 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1310 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1311 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1312 if(s->mb_x && dist)
1313 r->avail_cache[5] =
1314 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1315 if(dist >= s->mb_width)
1316 r->avail_cache[2] =
1317 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1318 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1319 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1320 if(s->mb_x && dist > s->mb_width)
1321 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1322
1323 s->qscale = r->si.quant;
1324 cbp = rv34_decode_intra_mb_header(r, intra_types);
1325 r->cbp_luma [mb_pos] = cbp;
1326 r->cbp_chroma[mb_pos] = cbp >> 16;
1327 r->deblock_coefs[mb_pos] = 0xFFFF;
1328 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1329
1330 if(cbp == -1)
1331 return -1;
1332
1333 if(r->is16){
1334 rv34_output_i16x16(r, intra_types, cbp);
1335 return 0;
1336 }
1337
1338 rv34_output_intra(r, intra_types, cbp);
1339 return 0;
1340}
1341
1342static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
1343{
1344 int bits;
1345 if(s->mb_y >= s->mb_height)
1346 return 1;
1347 if(!s->mb_num_left)
1348 return 1;
1349 if(r->s.mb_skip_run > 1)
1350 return 0;
1351 bits = get_bits_left(&s->gb);
1352 if(bits <= 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1353 return 1;
1354 return 0;
1355}
1356
1357
1358static void rv34_decoder_free(RV34DecContext *r)
1359{
1360 av_freep(&r->intra_types_hist);
1361 r->intra_types = NULL;
1362 av_freep(&r->tmp_b_block_base);
1363 av_freep(&r->mb_type);
1364 av_freep(&r->cbp_luma);
1365 av_freep(&r->cbp_chroma);
1366 av_freep(&r->deblock_coefs);
1367}
1368
1369
1370static int rv34_decoder_alloc(RV34DecContext *r)
1371{
1372 r->intra_types_stride = r->s.mb_width * 4 + 4;
1373
1374 r->cbp_chroma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1375 sizeof(*r->cbp_chroma));
1376 r->cbp_luma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1377 sizeof(*r->cbp_luma));
1378 r->deblock_coefs = av_mallocz(r->s.mb_stride * r->s.mb_height *
1379 sizeof(*r->deblock_coefs));
1380 r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 *
1381 sizeof(*r->intra_types_hist));
1382 r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1383 sizeof(*r->mb_type));
1384
1385 if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1386 r->intra_types_hist && r->mb_type)) {
1387 rv34_decoder_free(r);
1388 return AVERROR(ENOMEM);
1389 }
1390
1391 r->intra_types = r->intra_types_hist + r->intra_types_stride * 4;
1392
1393 return 0;
1394}
1395
1396
1397static int rv34_decoder_realloc(RV34DecContext *r)
1398{
1399 rv34_decoder_free(r);
1400 return rv34_decoder_alloc(r);
1401}
1402
1403
1404static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1405{
1406 MpegEncContext *s = &r->s;
1407 GetBitContext *gb = &s->gb;
1408 int mb_pos, slice_type;
1409 int res;
1410
1411 init_get_bits(&r->s.gb, buf, buf_size*8);
1412 res = r->parse_slice_header(r, gb, &r->si);
1413 if(res < 0){
1414 av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1415 return -1;
1416 }
1417
1418 slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1419 if (slice_type != s->pict_type) {
1420 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1421 return AVERROR_INVALIDDATA;
1422 }
1423 if (s->width != r->si.width || s->height != r->si.height) {
1424 av_log(s->avctx, AV_LOG_ERROR, "Size mismatch\n");
1425 return AVERROR_INVALIDDATA;
1426 }
1427
1428 r->si.end = end;
1429 s->qscale = r->si.quant;
1430 s->mb_num_left = r->si.end - r->si.start;
1431 r->s.mb_skip_run = 0;
1432
1433 mb_pos = s->mb_x + s->mb_y * s->mb_width;
1434 if(r->si.start != mb_pos){
1435 av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1436 s->mb_x = r->si.start % s->mb_width;
1437 s->mb_y = r->si.start / s->mb_width;
1438 }
1439 memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1440 s->first_slice_line = 1;
1441 s->resync_mb_x = s->mb_x;
1442 s->resync_mb_y = s->mb_y;
1443
1444 ff_init_block_index(s);
1445 while(!check_slice_end(r, s)) {
1446 ff_update_block_index(s);
1447
1448 if(r->si.type)
1449 res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1450 else
1451 res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1452 if(res < 0){
1453 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1454 return -1;
1455 }
1456 if (++s->mb_x == s->mb_width) {
1457 s->mb_x = 0;
1458 s->mb_y++;
1459 ff_init_block_index(s);
1460
1461 memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1462 memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1463
1464 if(r->loop_filter && s->mb_y >= 2)
1465 r->loop_filter(r, s->mb_y - 2);
1466
1467 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1468 ff_thread_report_progress(&s->current_picture_ptr->tf,
1469 s->mb_y - 2, 0);
1470
1471 }
1472 if(s->mb_x == s->resync_mb_x)
1473 s->first_slice_line=0;
1474 s->mb_num_left--;
1475 }
1476 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1477
1478 return s->mb_y == s->mb_height;
1479}
1480
1481/** @} */ // recons group end
1482
1483/**
1484 * Initialize decoder.
1485 */
1486av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
1487{
1488 RV34DecContext *r = avctx->priv_data;
1489 MpegEncContext *s = &r->s;
1490 int ret;
1491
1492 ff_mpv_decode_defaults(s);
1493 ff_mpv_decode_init(s, avctx);
1494 s->out_format = FMT_H263;
1495
1496 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1497 avctx->has_b_frames = 1;
1498 s->low_delay = 0;
1499
1500 ff_mpv_idct_init(s);
1501 if ((ret = ff_mpv_common_init(s)) < 0)
1502 return ret;
1503
1504 ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1505
1506#if CONFIG_RV30_DECODER
1507 if (avctx->codec_id == AV_CODEC_ID_RV30)
1508 ff_rv30dsp_init(&r->rdsp);
1509#endif
1510#if CONFIG_RV40_DECODER
1511 if (avctx->codec_id == AV_CODEC_ID_RV40)
1512 ff_rv40dsp_init(&r->rdsp);
1513#endif
1514
1515 if ((ret = rv34_decoder_alloc(r)) < 0) {
1516 ff_mpv_common_end(&r->s);
1517 return ret;
1518 }
1519
1520 if(!intra_vlcs[0].cbppattern[0].bits)
1521 rv34_init_tables();
1522
1523 avctx->internal->allocate_progress = 1;
1524
1525 return 0;
1526}
1527
1528int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
1529{
1530 int err;
1531 RV34DecContext *r = avctx->priv_data;
1532
1533 r->s.avctx = avctx;
1534
1535 if (avctx->internal->is_copy) {
1536 r->tmp_b_block_base = NULL;
1537 ff_mpv_idct_init(&r->s);
1538 if ((err = ff_mpv_common_init(&r->s)) < 0)
1539 return err;
1540 if ((err = rv34_decoder_alloc(r)) < 0) {
1541 ff_mpv_common_end(&r->s);
1542 return err;
1543 }
1544 }
1545
1546 return 0;
1547}
1548
1549int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1550{
1551 RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1552 MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1553 int err;
1554
1555 if (dst == src || !s1->context_initialized)
1556 return 0;
1557
1558 if (s->height != s1->height || s->width != s1->width) {
1559 s->height = s1->height;
1560 s->width = s1->width;
1561 if ((err = ff_mpv_common_frame_size_change(s)) < 0)
1562 return err;
1563 if ((err = rv34_decoder_realloc(r)) < 0)
1564 return err;
1565 }
1566
1567 r->cur_pts = r1->cur_pts;
1568 r->last_pts = r1->last_pts;
1569 r->next_pts = r1->next_pts;
1570
1571 memset(&r->si, 0, sizeof(r->si));
1572
1573 // Do no call ff_mpeg_update_thread_context on a partially initialized
1574 // decoder context.
1575 if (!s1->linesize)
1576 return 0;
1577
1578 return ff_mpeg_update_thread_context(dst, src);
1579}
1580
1581static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
1582{
1583 if(avctx->slice_count) return avctx->slice_offset[n];
1584 else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1585}
1586
1587static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1588{
1589 RV34DecContext *r = avctx->priv_data;
1590 MpegEncContext *s = &r->s;
1591 int got_picture = 0, ret;
1592
1593 ff_er_frame_end(&s->er);
1594 ff_mpv_frame_end(s);
1595 s->mb_num_left = 0;
1596
1597 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1598 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1599
1600 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1601 if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1602 return ret;
1603 ff_print_debug_info(s, s->current_picture_ptr, pict);
1604 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
1605 got_picture = 1;
1606 } else if (s->last_picture_ptr) {
1607 if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1608 return ret;
1609 ff_print_debug_info(s, s->last_picture_ptr, pict);
1610 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
1611 got_picture = 1;
1612 }
1613
1614 return got_picture;
1615}
1616
1617static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, int new_h)
1618{
1619 // attempt to keep aspect during typical resolution switches
1620 if (!sar.num)
1621 sar = (AVRational){1, 1};
1622
1623 sar = av_mul_q(sar, (AVRational){new_h * old_w, new_w * old_h});
1624 return sar;
1625}
1626
1627int ff_rv34_decode_frame(AVCodecContext *avctx,
1628 void *data, int *got_picture_ptr,
1629 AVPacket *avpkt)
1630{
1631 const uint8_t *buf = avpkt->data;
1632 int buf_size = avpkt->size;
1633 RV34DecContext *r = avctx->priv_data;
1634 MpegEncContext *s = &r->s;
1635 AVFrame *pict = data;
1636 SliceInfo si;
1637 int i, ret;
1638 int slice_count;
1639 const uint8_t *slices_hdr = NULL;
1640 int last = 0;
1641
1642 /* no supplementary picture */
1643 if (buf_size == 0) {
1644 /* special case for last picture */
1645 if (s->low_delay==0 && s->next_picture_ptr) {
1646 if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
1647 return ret;
1648 s->next_picture_ptr = NULL;
1649
1650 *got_picture_ptr = 1;
1651 }
1652 return 0;
1653 }
1654
1655 if(!avctx->slice_count){
1656 slice_count = (*buf++) + 1;
1657 slices_hdr = buf + 4;
1658 buf += 8 * slice_count;
1659 buf_size -= 1 + 8 * slice_count;
1660 }else
1661 slice_count = avctx->slice_count;
1662
1663 //parse first slice header to check whether this frame can be decoded
1664 if(get_slice_offset(avctx, slices_hdr, 0) < 0 ||
1665 get_slice_offset(avctx, slices_hdr, 0) > buf_size){
1666 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1667 return AVERROR_INVALIDDATA;
1668 }
1669 init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), (buf_size-get_slice_offset(avctx, slices_hdr, 0))*8);
1670 if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
1671 av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
1672 return AVERROR_INVALIDDATA;
1673 }
1674 if ((!s->last_picture_ptr || !s->last_picture_ptr->f->data[0]) &&
1675 si.type == AV_PICTURE_TYPE_B) {
1676 av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
1677 "reference data.\n");
1678 return AVERROR_INVALIDDATA;
1679 }
1680 if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
1681 || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
1682 || avctx->skip_frame >= AVDISCARD_ALL)
1683 return avpkt->size;
1684
1685 /* first slice */
1686 if (si.start == 0) {
1687 if (s->mb_num_left > 0 && s->current_picture_ptr) {
1688 av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
1689 s->mb_num_left);
1690 ff_er_frame_end(&s->er);
1691 ff_mpv_frame_end(s);
1692 }
1693
1694 if (s->width != si.width || s->height != si.height) {
1695 int err;
1696
1697 av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1698 si.width, si.height);
1699
1700 if (av_image_check_size(si.width, si.height, 0, s->avctx))
1701 return AVERROR_INVALIDDATA;
1702
1703 s->avctx->sample_aspect_ratio = update_sar(
1704 s->width, s->height, s->avctx->sample_aspect_ratio,
1705 si.width, si.height);
1706 s->width = si.width;
1707 s->height = si.height;
1708
1709 err = ff_set_dimensions(s->avctx, s->width, s->height);
1710 if (err < 0)
1711 return err;
1712
1713 if ((err = ff_mpv_common_frame_size_change(s)) < 0)
1714 return err;
1715 if ((err = rv34_decoder_realloc(r)) < 0)
1716 return err;
1717 }
1718 s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1719 if (ff_mpv_frame_start(s, s->avctx) < 0)
1720 return -1;
1721 ff_mpeg_er_frame_start(s);
1722 if (!r->tmp_b_block_base) {
1723 int i;
1724
1725 r->tmp_b_block_base = av_malloc(s->linesize * 48);
1726 for (i = 0; i < 2; i++)
1727 r->tmp_b_block_y[i] = r->tmp_b_block_base
1728 + i * 16 * s->linesize;
1729 for (i = 0; i < 4; i++)
1730 r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1731 + (i >> 1) * 8 * s->uvlinesize
1732 + (i & 1) * 16;
1733 }
1734 r->cur_pts = si.pts;
1735 if (s->pict_type != AV_PICTURE_TYPE_B) {
1736 r->last_pts = r->next_pts;
1737 r->next_pts = r->cur_pts;
1738 } else {
1739 int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1740 int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1741 int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1742
1743 if(!refdist){
1744 r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1745 r->scaled_weight = 0;
1746 }else{
1747 r->mv_weight1 = (dist0 << 14) / refdist;
1748 r->mv_weight2 = (dist1 << 14) / refdist;
1749 if((r->mv_weight1|r->mv_weight2) & 511){
1750 r->weight1 = r->mv_weight1;
1751 r->weight2 = r->mv_weight2;
1752 r->scaled_weight = 0;
1753 }else{
1754 r->weight1 = r->mv_weight1 >> 9;
1755 r->weight2 = r->mv_weight2 >> 9;
1756 r->scaled_weight = 1;
1757 }
1758 }
1759 }
1760 s->mb_x = s->mb_y = 0;
1761 ff_thread_finish_setup(s->avctx);
1762 } else if (HAVE_THREADS &&
1763 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1764 av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1765 "multithreading mode (start MB is %d).\n", si.start);
1766 return AVERROR_INVALIDDATA;
1767 }
1768
1769 for(i = 0; i < slice_count; i++){
1770 int offset = get_slice_offset(avctx, slices_hdr, i);
1771 int size;
1772 if(i+1 == slice_count)
1773 size = buf_size - offset;
1774 else
1775 size = get_slice_offset(avctx, slices_hdr, i+1) - offset;
1776
1777 if(offset < 0 || offset > buf_size){
1778 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1779 break;
1780 }
1781
1782 r->si.end = s->mb_width * s->mb_height;
1783 s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1784
1785 if(i+1 < slice_count){
1786 if (get_slice_offset(avctx, slices_hdr, i+1) < 0 ||
1787 get_slice_offset(avctx, slices_hdr, i+1) > buf_size) {
1788 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1789 break;
1790 }
1791 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);
1792 if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1793 if(i+2 < slice_count)
1794 size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1795 else
1796 size = buf_size - offset;
1797 }else
1798 r->si.end = si.start;
1799 }
1800 if (size < 0 || size > buf_size - offset) {
1801 av_log(avctx, AV_LOG_ERROR, "Slice size is invalid\n");
1802 break;
1803 }
1804 last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1805 if(last)
1806 break;
1807 }
1808
1809 if (s->current_picture_ptr) {
1810 if (last) {
1811 if(r->loop_filter)
1812 r->loop_filter(r, s->mb_height - 1);
1813
1814 ret = finish_frame(avctx, pict);
1815 if (ret < 0)
1816 return ret;
1817 *got_picture_ptr = ret;
1818 } else if (HAVE_THREADS &&
1819 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1820 av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1821 /* always mark the current frame as finished, frame-mt supports
1822 * only complete frames */
1823 ff_er_frame_end(&s->er);
1824 ff_mpv_frame_end(s);
1825 s->mb_num_left = 0;
1826 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1827 return AVERROR_INVALIDDATA;
1828 }
1829 }
1830
1831 return avpkt->size;
1832}
1833
1834av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
1835{
1836 RV34DecContext *r = avctx->priv_data;
1837
1838 ff_mpv_common_end(&r->s);
1839 rv34_decoder_free(r);
1840
1841 return 0;
1842}
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