2 * RV30/40 decoder common data
3 * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
24 * RV30/40 decoder common data
27 #include "libavutil/imgutils.h"
28 #include "libavutil/internal.h"
31 #include "error_resilience.h"
32 #include "mpegvideo.h"
36 #include "rectangle.h"
43 static inline void ZERO8x2(void* dst, int stride)
45 fill_rectangle(dst, 1, 2, stride, 0, 4);
46 fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
49 /** translation of RV30/40 macroblock types to lavc ones */
50 static const int rv34_mb_type_to_lavc[12] = {
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,
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
66 static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
68 static int rv34_decode_mv(RV34DecContext *r, int block_type);
71 * @name RV30/40 VLC generating functions
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
96 static VLC_TYPE table_data[117592][2];
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)
106 static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms,
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;
115 for(i = 0; i < size; i++){
117 bits2[realsize] = bits[i];
118 syms[realsize] = insyms ? insyms[i] : i;
120 maxbits = FFMAX(maxbits, bits[i]);
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]]++;
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,
136 syms, 2, 2, INIT_VLC_USE_NEW_STATIC);
140 * Initialize all tables.
142 static av_cold void rv34_init_tables(void)
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);
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);
158 rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL, 19*i + 18);
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);
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);
171 rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL, i*12 + 106);
175 /** @} */ // vlc group
178 * @name RV30/40 4x4 block decoding functions
183 * Decode coded block pattern.
185 static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
187 int pattern, code, cbp=0;
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;
194 code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
195 pattern = code & 0xF;
198 ones = rv34_count_ones[pattern];
200 for(mask = 8; mask; mask >>= 1, curshift++){
202 cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
205 for(i = 0; i < 4; i++){
206 t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
208 cbp |= cbp_masks[get_bits1(gb)] << i;
210 cbp |= cbp_masks[2] << i;
216 * Get one coefficient value from the bitstream and store it.
218 static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
222 coef = get_vlc2(gb, vlc->table, 9, 2);
225 coef = 22 + ((1 << coef) | get_bits(gb, coef));
231 *dst = (coef*q + 8) >> 4;
236 * Decode 2x2 subblock of coefficients.
238 static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
240 int flags = modulo_three_table[code];
242 decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
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);
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);
250 decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
254 * Decode a single coefficient.
256 static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
258 int coeff = modulo_three_table[code] >> 6;
259 decode_coeff(dst, coeff, 3, gb, vlc, q);
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)
265 int flags = modulo_three_table[code];
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);
274 * Decode coefficients for 4x4 block.
276 * This is done by filling 2x2 subblocks with decoded coefficients
277 * in this order (the same for subblocks and subblock coefficients):
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)
286 int code, pattern, has_ac = 1;
288 code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
290 pattern = code & 0x7;
294 if (modulo_three_table[code] & 0x3F) {
295 decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
297 decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
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);
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);
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);
315 return has_ac | pattern;
319 * @name RV30/40 bitstream parsing
324 * Decode starting slice position.
325 * @todo Maybe replace with ff_h263_decode_mba() ?
327 int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
330 for(i = 0; i < 5; i++)
331 if(rv34_mb_max_sizes[i] >= mb_size - 1)
333 return rv34_mb_bits_sizes[i];
337 * Select VLC set for decoding from current quantizer, modifier and frame type.
339 static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
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)]];
348 * Decode intra macroblock header and return CBP in case of success, -1 otherwise.
350 static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
352 MpegEncContext *s = &r->s;
353 GetBitContext *gb = &s->gb;
354 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
357 r->is16 = get_bits1(gb);
359 s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA16x16;
360 r->block_type = RV34_MB_TYPE_INTRA16x16;
362 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
367 av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
369 s->current_picture_ptr->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)
377 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
379 return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
383 * Decode inter macroblock header and return CBP in case of success, -1 otherwise.
385 static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
387 MpegEncContext *s = &r->s;
388 GetBitContext *gb = &s->gb;
389 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
392 r->block_type = r->decode_mb_info(r);
393 if(r->block_type == -1)
395 s->current_picture_ptr->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;
403 r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
404 rv34_decode_mv(r, r->block_type);
405 if(r->block_type == RV34_MB_SKIP){
406 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0]));
412 if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
415 fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
418 if(r->decode_intra_types(r, gb, intra_types) < 0)
423 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
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){
432 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
436 return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
439 /** @} */ //bitstream functions
442 * @name motion vector related code (prediction, reconstruction, motion compensation)
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 };
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 };
452 /** availability index for subblocks */
453 static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
456 * motion vector prediction
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.
462 static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
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];
469 int* avail = r->avail_cache + avail_indexes[subblock_no];
470 int c_off = part_sizes_w[block_type];
472 mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
477 A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
478 A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
481 B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
482 B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
488 if(avail[-4] && (avail[-1] || r->rv30)){
489 C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
490 C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
496 C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
497 C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
499 mx = mid_pred(A[0], B[0], C[0]);
500 my = mid_pred(A[1], B[1], C[1]);
501 mx += r->dmv[dmv_no][0];
502 my += r->dmv[dmv_no][1];
503 for(j = 0; j < part_sizes_h[block_type]; j++){
504 for(i = 0; i < part_sizes_w[block_type]; i++){
505 s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
506 s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
511 #define GET_PTS_DIFF(a, b) ((a - b + 8192) & 0x1FFF)
514 * Calculate motion vector component that should be added for direct blocks.
516 static int calc_add_mv(RV34DecContext *r, int dir, int val)
518 int mul = dir ? -r->mv_weight2 : r->mv_weight1;
520 return (val * mul + 0x2000) >> 14;
524 * Predict motion vector for B-frame macroblock.
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,
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){
538 *mx = mid_pred(A[0], B[0], C[0]);
539 *my = mid_pred(A[1], B[1], C[1]);
544 * motion vector prediction for B-frames
546 static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
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;
555 Picture *cur_pic = s->current_picture_ptr;
556 const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
557 int type = cur_pic->mb_type[mb_pos];
559 if((r->avail_cache[6-1] & type) & mask){
560 A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
561 A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
564 if((r->avail_cache[6-4] & type) & mask){
565 B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
566 B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
569 if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){
570 C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
571 C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
573 }else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){
574 C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
575 C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
579 rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
581 mx += r->dmv[dir][0];
582 my += r->dmv[dir][1];
584 for(j = 0; j < 2; j++){
585 for(i = 0; i < 2; i++){
586 cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
587 cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
590 if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD){
591 ZERO8x2(cur_pic->motion_val[!dir][mv_pos], s->b8_stride);
596 * motion vector prediction - RV3 version
598 static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir)
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];
605 int* avail = r->avail_cache + avail_indexes[0];
608 A[0] = s->current_picture_ptr->motion_val[0][mv_pos - 1][0];
609 A[1] = s->current_picture_ptr->motion_val[0][mv_pos - 1][1];
612 B[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][0];
613 B[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][1];
619 if(avail[-4] && (avail[-1])){
620 C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][0];
621 C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][1];
627 C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][0];
628 C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][1];
630 mx = mid_pred(A[0], B[0], C[0]);
631 my = mid_pred(A[1], B[1], C[1]);
634 for(j = 0; j < 2; j++){
635 for(i = 0; i < 2; i++){
636 for(k = 0; k < 2; k++){
637 s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
638 s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my;
644 static const int chroma_coeffs[3] = { 0, 3, 5 };
647 * generic motion compensation function
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
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))
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;
675 int chroma_mx, chroma_my;
676 mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
677 my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
678 lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
679 ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
680 chroma_mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
681 chroma_my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
682 umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
683 umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
684 uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];
685 uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3];
688 mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
689 my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
690 lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3;
691 ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3;
692 cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
693 cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
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)
703 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
704 /* wait for the referenced mb row to be finished */
705 int mb_row = s->mb_y + ((yoff + my + 5 + 8 * height) >> 4);
706 ThreadFrame *f = dir ? &s->next_picture_ptr->tf : &s->last_picture_ptr->tf;
707 ff_thread_await_progress(f, mb_row, 0);
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;
726 srcY -= 2 + 2*s->linesize;
727 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
728 s->linesize, s->linesize,
729 (width << 3) + 6, (height << 3) + 6,
730 src_x - 2, src_y - 2,
731 s->h_edge_pos, s->v_edge_pos);
732 srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
733 s->vdsp.emulated_edge_mc(uvbuf, srcU,
734 s->uvlinesize, s->uvlinesize,
735 (width << 2) + 1, (height << 2) + 1,
737 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
738 s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
739 s->uvlinesize, s->uvlinesize,
740 (width << 2) + 1, (height << 2) + 1,
742 s->h_edge_pos >> 1, s->v_edge_pos >> 1);
747 Y = s->dest[0] + xoff + yoff *s->linesize;
748 U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
749 V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
751 Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
752 U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
753 V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
756 if(block_type == RV34_MB_P_16x8){
757 qpel_mc[1][dxy](Y, srcY, s->linesize);
760 }else if(block_type == RV34_MB_P_8x16){
761 qpel_mc[1][dxy](Y, srcY, s->linesize);
762 Y += 8 * s->linesize;
763 srcY += 8 * s->linesize;
765 is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
766 qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
767 chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
768 chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
771 static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
772 const int xoff, const int yoff, int mv_off,
773 const int width, const int height, int dir)
775 rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
776 r->rdsp.put_pixels_tab,
777 r->rdsp.put_chroma_pixels_tab);
780 static void rv4_weight(RV34DecContext *r)
782 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][0](r->s.dest[0],
788 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[1],
789 r->tmp_b_block_uv[0],
790 r->tmp_b_block_uv[2],
794 r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[2],
795 r->tmp_b_block_uv[1],
796 r->tmp_b_block_uv[3],
802 static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
804 int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
806 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
807 r->rdsp.put_pixels_tab,
808 r->rdsp.put_chroma_pixels_tab);
810 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
811 r->rdsp.avg_pixels_tab,
812 r->rdsp.avg_chroma_pixels_tab);
814 rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
815 r->rdsp.put_pixels_tab,
816 r->rdsp.put_chroma_pixels_tab);
821 static void rv34_mc_2mv_skip(RV34DecContext *r)
824 int weighted = !r->rv30 && r->weight1 != 8192;
826 for(j = 0; j < 2; j++)
827 for(i = 0; i < 2; i++){
828 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
830 r->rdsp.put_pixels_tab,
831 r->rdsp.put_chroma_pixels_tab);
832 rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
834 weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
835 weighted ? r->rdsp.put_chroma_pixels_tab : r->rdsp.avg_chroma_pixels_tab);
841 /** number of motion vectors in each macroblock type */
842 static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
845 * Decode motion vector differences
846 * and perform motion vector reconstruction and motion compensation.
848 static int rv34_decode_mv(RV34DecContext *r, int block_type)
850 MpegEncContext *s = &r->s;
851 GetBitContext *gb = &s->gb;
853 int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
856 memset(r->dmv, 0, sizeof(r->dmv));
857 for(i = 0; i < num_mvs[block_type]; i++){
858 r->dmv[i][0] = svq3_get_se_golomb(gb);
859 r->dmv[i][1] = svq3_get_se_golomb(gb);
862 case RV34_MB_TYPE_INTRA:
863 case RV34_MB_TYPE_INTRA16x16:
864 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
867 if(s->pict_type == AV_PICTURE_TYPE_P){
868 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
869 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
872 case RV34_MB_B_DIRECT:
873 //surprisingly, it uses motion scheme from next reference frame
874 /* wait for the current mb row to be finished */
875 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
876 ff_thread_await_progress(&s->next_picture_ptr->tf, FFMAX(0, s->mb_y-1), 0);
878 next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
879 if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
880 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
881 ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
883 for(j = 0; j < 2; j++)
884 for(i = 0; i < 2; i++)
885 for(k = 0; k < 2; k++)
886 for(l = 0; l < 2; l++)
887 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]);
888 if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
889 rv34_mc_2mv(r, block_type);
892 ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
894 case RV34_MB_P_16x16:
895 case RV34_MB_P_MIX16x16:
896 rv34_pred_mv(r, block_type, 0, 0);
897 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
899 case RV34_MB_B_FORWARD:
900 case RV34_MB_B_BACKWARD:
901 r->dmv[1][0] = r->dmv[0][0];
902 r->dmv[1][1] = r->dmv[0][1];
904 rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
906 rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
907 rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
911 rv34_pred_mv(r, block_type, 0, 0);
912 rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
913 if(block_type == RV34_MB_P_16x8){
914 rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
915 rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
917 if(block_type == RV34_MB_P_8x16){
918 rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
919 rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
922 case RV34_MB_B_BIDIR:
923 rv34_pred_mv_b (r, block_type, 0);
924 rv34_pred_mv_b (r, block_type, 1);
925 rv34_mc_2mv (r, block_type);
929 rv34_pred_mv(r, block_type, i, i);
930 rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
937 /** @} */ // mv group
940 * @name Macroblock reconstruction functions
943 /** mapping of RV30/40 intra prediction types to standard H.264 types */
944 static const int ittrans[9] = {
945 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
946 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
949 /** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
950 static const int ittrans16[4] = {
951 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
955 * Perform 4x4 intra prediction.
957 static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
959 uint8_t *prev = dst - stride + 4;
965 if(itype == VERT_PRED) itype = HOR_PRED;
966 if(itype == DC_PRED) itype = LEFT_DC_PRED;
968 if(itype == HOR_PRED) itype = VERT_PRED;
969 if(itype == DC_PRED) itype = TOP_DC_PRED;
970 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
973 if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
974 if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
975 if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
978 topleft = dst[-stride + 3] * 0x01010101u;
979 prev = (uint8_t*)&topleft;
981 r->h.pred4x4[itype](dst, prev, stride);
984 static inline int adjust_pred16(int itype, int up, int left)
987 itype = DC_128_PRED8x8;
989 if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
990 if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
991 if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
993 if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
994 if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
995 if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
1000 static inline void rv34_process_block(RV34DecContext *r,
1001 uint8_t *pdst, int stride,
1002 int fc, int sc, int q_dc, int q_ac)
1004 MpegEncContext *s = &r->s;
1005 int16_t *ptr = s->block[0];
1006 int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
1007 fc, sc, q_dc, q_ac, q_ac);
1009 r->rdsp.rv34_idct_add(pdst, stride, ptr);
1011 r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
1016 static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
1018 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1019 MpegEncContext *s = &r->s;
1020 GetBitContext *gb = &s->gb;
1021 int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
1022 q_ac = rv34_qscale_tab[s->qscale];
1023 uint8_t *dst = s->dest[0];
1024 int16_t *ptr = s->block[0];
1025 int i, j, itype, has_ac;
1027 memset(block16, 0, 16 * sizeof(*block16));
1029 has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
1031 r->rdsp.rv34_inv_transform(block16);
1033 r->rdsp.rv34_inv_transform_dc(block16);
1035 itype = ittrans16[intra_types[0]];
1036 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1037 r->h.pred16x16[itype](dst, s->linesize);
1039 for(j = 0; j < 4; j++){
1040 for(i = 0; i < 4; i++, cbp >>= 1){
1041 int dc = block16[i + j*4];
1044 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1050 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1052 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1055 dst += 4*s->linesize;
1058 itype = ittrans16[intra_types[0]];
1059 if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
1060 itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
1062 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1063 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1065 for(j = 1; j < 3; j++){
1067 r->h.pred8x8[itype](dst, s->uvlinesize);
1068 for(i = 0; i < 4; i++, cbp >>= 1){
1070 if(!(cbp & 1)) continue;
1071 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1073 rv34_process_block(r, pdst, s->uvlinesize,
1074 r->chroma_vlc, 1, q_dc, q_ac);
1079 static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
1081 MpegEncContext *s = &r->s;
1082 uint8_t *dst = s->dest[0];
1083 int avail[6*8] = {0};
1085 int idx, q_ac, q_dc;
1087 // Set neighbour information.
1088 if(r->avail_cache[1])
1090 if(r->avail_cache[2])
1091 avail[1] = avail[2] = 1;
1092 if(r->avail_cache[3])
1093 avail[3] = avail[4] = 1;
1094 if(r->avail_cache[4])
1096 if(r->avail_cache[5])
1097 avail[8] = avail[16] = 1;
1098 if(r->avail_cache[9])
1099 avail[24] = avail[32] = 1;
1101 q_ac = rv34_qscale_tab[s->qscale];
1102 for(j = 0; j < 4; j++){
1104 for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
1105 rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
1107 if(!(cbp & 1)) continue;
1109 rv34_process_block(r, dst, s->linesize,
1110 r->luma_vlc, 0, q_ac, q_ac);
1112 dst += s->linesize * 4 - 4*4;
1113 intra_types += r->intra_types_stride;
1116 intra_types -= r->intra_types_stride * 4;
1118 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1119 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1121 for(k = 0; k < 2; k++){
1123 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
1125 for(j = 0; j < 2; j++){
1126 int* acache = r->avail_cache + 6 + j*4;
1127 for(i = 0; i < 2; i++, cbp >>= 1, acache++){
1128 int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
1129 rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
1132 if(!(cbp&1)) continue;
1134 rv34_process_block(r, dst + 4*i, s->uvlinesize,
1135 r->chroma_vlc, 1, q_dc, q_ac);
1138 dst += 4*s->uvlinesize;
1143 static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
1146 d = motion_val[0][0] - motion_val[-step][0];
1149 d = motion_val[0][1] - motion_val[-step][1];
1155 static int rv34_set_deblock_coef(RV34DecContext *r)
1157 MpegEncContext *s = &r->s;
1158 int hmvmask = 0, vmvmask = 0, i, j;
1159 int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
1160 int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
1161 for(j = 0; j < 16; j += 8){
1162 for(i = 0; i < 2; i++){
1163 if(is_mv_diff_gt_3(motion_val + i, 1))
1164 vmvmask |= 0x11 << (j + i*2);
1165 if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
1166 hmvmask |= 0x03 << (j + i*2);
1168 motion_val += s->b8_stride;
1170 if(s->first_slice_line)
1174 if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
1175 vmvmask |= (vmvmask & 0x4444) >> 1;
1176 hmvmask |= (hmvmask & 0x0F00) >> 4;
1178 r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
1179 if(!s->first_slice_line)
1180 r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
1182 return hmvmask | vmvmask;
1185 static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
1187 MpegEncContext *s = &r->s;
1188 GetBitContext *gb = &s->gb;
1189 uint8_t *dst = s->dest[0];
1190 int16_t *ptr = s->block[0];
1191 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1193 int q_dc, q_ac, has_ac;
1197 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1198 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1199 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1200 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1203 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1204 if(dist >= s->mb_width)
1206 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1207 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1208 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1209 if(s->mb_x && dist > s->mb_width)
1210 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1212 s->qscale = r->si.quant;
1213 cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
1214 r->cbp_luma [mb_pos] = cbp;
1215 r->cbp_chroma[mb_pos] = cbp >> 16;
1216 r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
1217 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1222 if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
1223 if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
1224 else rv34_output_intra(r, intra_types, cbp);
1229 // Only for RV34_MB_P_MIX16x16
1230 LOCAL_ALIGNED_16(int16_t, block16, [16]);
1231 memset(block16, 0, 16 * sizeof(*block16));
1232 q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
1233 q_ac = rv34_qscale_tab[s->qscale];
1234 if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
1235 r->rdsp.rv34_inv_transform(block16);
1237 r->rdsp.rv34_inv_transform_dc(block16);
1239 q_ac = rv34_qscale_tab[s->qscale];
1241 for(j = 0; j < 4; j++){
1242 for(i = 0; i < 4; i++, cbp >>= 1){
1243 int dc = block16[i + j*4];
1246 has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
1252 r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
1254 r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
1257 dst += 4*s->linesize;
1260 r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
1262 q_ac = rv34_qscale_tab[s->qscale];
1264 for(j = 0; j < 4; j++){
1265 for(i = 0; i < 4; i++, cbp >>= 1){
1266 if(!(cbp & 1)) continue;
1268 rv34_process_block(r, dst + 4*i, s->linesize,
1269 r->luma_vlc, 0, q_ac, q_ac);
1271 dst += 4*s->linesize;
1275 q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
1276 q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
1278 for(j = 1; j < 3; j++){
1280 for(i = 0; i < 4; i++, cbp >>= 1){
1282 if(!(cbp & 1)) continue;
1283 pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
1285 rv34_process_block(r, pdst, s->uvlinesize,
1286 r->chroma_vlc, 1, q_dc, q_ac);
1293 static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
1295 MpegEncContext *s = &r->s;
1297 int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
1299 // Calculate which neighbours are available. Maybe it's worth optimizing too.
1300 memset(r->avail_cache, 0, sizeof(r->avail_cache));
1301 fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
1302 dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
1305 r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
1306 if(dist >= s->mb_width)
1308 r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
1309 if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
1310 r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
1311 if(s->mb_x && dist > s->mb_width)
1312 r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
1314 s->qscale = r->si.quant;
1315 cbp = rv34_decode_intra_mb_header(r, intra_types);
1316 r->cbp_luma [mb_pos] = cbp;
1317 r->cbp_chroma[mb_pos] = cbp >> 16;
1318 r->deblock_coefs[mb_pos] = 0xFFFF;
1319 s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
1325 rv34_output_i16x16(r, intra_types, cbp);
1329 rv34_output_intra(r, intra_types, cbp);
1333 static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
1336 if(s->mb_y >= s->mb_height)
1340 if(r->s.mb_skip_run > 1)
1342 bits = get_bits_left(&s->gb);
1343 if(bits <= 0 || (bits < 8 && !show_bits(&s->gb, bits)))
1349 static void rv34_decoder_free(RV34DecContext *r)
1351 av_freep(&r->intra_types_hist);
1352 r->intra_types = NULL;
1353 av_freep(&r->tmp_b_block_base);
1354 av_freep(&r->mb_type);
1355 av_freep(&r->cbp_luma);
1356 av_freep(&r->cbp_chroma);
1357 av_freep(&r->deblock_coefs);
1361 static int rv34_decoder_alloc(RV34DecContext *r)
1363 r->intra_types_stride = r->s.mb_width * 4 + 4;
1365 r->cbp_chroma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1366 sizeof(*r->cbp_chroma));
1367 r->cbp_luma = av_mallocz(r->s.mb_stride * r->s.mb_height *
1368 sizeof(*r->cbp_luma));
1369 r->deblock_coefs = av_mallocz(r->s.mb_stride * r->s.mb_height *
1370 sizeof(*r->deblock_coefs));
1371 r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 *
1372 sizeof(*r->intra_types_hist));
1373 r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
1374 sizeof(*r->mb_type));
1376 if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
1377 r->intra_types_hist && r->mb_type)) {
1378 rv34_decoder_free(r);
1379 return AVERROR(ENOMEM);
1382 r->intra_types = r->intra_types_hist + r->intra_types_stride * 4;
1388 static int rv34_decoder_realloc(RV34DecContext *r)
1390 rv34_decoder_free(r);
1391 return rv34_decoder_alloc(r);
1395 static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
1397 MpegEncContext *s = &r->s;
1398 GetBitContext *gb = &s->gb;
1399 int mb_pos, slice_type;
1402 init_get_bits(&r->s.gb, buf, buf_size*8);
1403 res = r->parse_slice_header(r, gb, &r->si);
1405 av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
1409 slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
1410 if (slice_type != s->pict_type) {
1411 av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
1412 return AVERROR_INVALIDDATA;
1414 if (s->width != r->si.width || s->height != r->si.height) {
1415 av_log(s->avctx, AV_LOG_ERROR, "Size mismatch\n");
1416 return AVERROR_INVALIDDATA;
1420 s->qscale = r->si.quant;
1421 s->mb_num_left = r->si.end - r->si.start;
1422 r->s.mb_skip_run = 0;
1424 mb_pos = s->mb_x + s->mb_y * s->mb_width;
1425 if(r->si.start != mb_pos){
1426 av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
1427 s->mb_x = r->si.start % s->mb_width;
1428 s->mb_y = r->si.start / s->mb_width;
1430 memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
1431 s->first_slice_line = 1;
1432 s->resync_mb_x = s->mb_x;
1433 s->resync_mb_y = s->mb_y;
1435 ff_init_block_index(s);
1436 while(!check_slice_end(r, s)) {
1437 ff_update_block_index(s);
1440 res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1442 res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
1444 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
1447 if (++s->mb_x == s->mb_width) {
1450 ff_init_block_index(s);
1452 memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1453 memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
1455 if(r->loop_filter && s->mb_y >= 2)
1456 r->loop_filter(r, s->mb_y - 2);
1458 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1459 ff_thread_report_progress(&s->current_picture_ptr->tf,
1463 if(s->mb_x == s->resync_mb_x)
1464 s->first_slice_line=0;
1467 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
1469 return s->mb_y == s->mb_height;
1472 /** @} */ // recons group end
1475 * Initialize decoder.
1477 av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
1479 RV34DecContext *r = avctx->priv_data;
1480 MpegEncContext *s = &r->s;
1483 ff_MPV_decode_defaults(s);
1485 s->out_format = FMT_H263;
1486 s->codec_id = avctx->codec_id;
1488 s->width = avctx->width;
1489 s->height = avctx->height;
1492 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
1493 avctx->has_b_frames = 1;
1496 if ((ret = ff_MPV_common_init(s)) < 0)
1499 ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
1501 #if CONFIG_RV30_DECODER
1502 if (avctx->codec_id == AV_CODEC_ID_RV30)
1503 ff_rv30dsp_init(&r->rdsp);
1505 #if CONFIG_RV40_DECODER
1506 if (avctx->codec_id == AV_CODEC_ID_RV40)
1507 ff_rv40dsp_init(&r->rdsp);
1510 if ((ret = rv34_decoder_alloc(r)) < 0) {
1511 ff_MPV_common_end(&r->s);
1515 if(!intra_vlcs[0].cbppattern[0].bits)
1518 avctx->internal->allocate_progress = 1;
1523 int ff_rv34_decode_init_thread_copy(AVCodecContext *avctx)
1526 RV34DecContext *r = avctx->priv_data;
1530 if (avctx->internal->is_copy) {
1531 r->tmp_b_block_base = NULL;
1532 if ((err = ff_MPV_common_init(&r->s)) < 0)
1534 if ((err = rv34_decoder_alloc(r)) < 0) {
1535 ff_MPV_common_end(&r->s);
1543 int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
1545 RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
1546 MpegEncContext * const s = &r->s, * const s1 = &r1->s;
1549 if (dst == src || !s1->context_initialized)
1552 if (s->height != s1->height || s->width != s1->width) {
1553 s->height = s1->height;
1554 s->width = s1->width;
1555 if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1557 if ((err = rv34_decoder_realloc(r)) < 0)
1561 if ((err = ff_mpeg_update_thread_context(dst, src)))
1564 r->cur_pts = r1->cur_pts;
1565 r->last_pts = r1->last_pts;
1566 r->next_pts = r1->next_pts;
1568 memset(&r->si, 0, sizeof(r->si));
1573 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
1575 if(avctx->slice_count) return avctx->slice_offset[n];
1576 else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
1579 static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
1581 RV34DecContext *r = avctx->priv_data;
1582 MpegEncContext *s = &r->s;
1583 int got_picture = 0, ret;
1585 ff_er_frame_end(&s->er);
1586 ff_MPV_frame_end(s);
1589 if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
1590 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1592 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1593 if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
1595 ff_print_debug_info(s, s->current_picture_ptr, pict);
1596 ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
1598 } else if (s->last_picture_ptr != NULL) {
1599 if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
1601 ff_print_debug_info(s, s->last_picture_ptr, pict);
1602 ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
1609 static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, int new_h)
1611 // attempt to keep aspect during typical resolution switches
1613 sar = (AVRational){1, 1};
1615 sar = av_mul_q(sar, (AVRational){new_h * old_w, new_w * old_h});
1619 int ff_rv34_decode_frame(AVCodecContext *avctx,
1620 void *data, int *got_picture_ptr,
1623 const uint8_t *buf = avpkt->data;
1624 int buf_size = avpkt->size;
1625 RV34DecContext *r = avctx->priv_data;
1626 MpegEncContext *s = &r->s;
1627 AVFrame *pict = data;
1631 const uint8_t *slices_hdr = NULL;
1634 /* no supplementary picture */
1635 if (buf_size == 0) {
1636 /* special case for last picture */
1637 if (s->low_delay==0 && s->next_picture_ptr) {
1638 if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)
1640 s->next_picture_ptr = NULL;
1642 *got_picture_ptr = 1;
1647 if(!avctx->slice_count){
1648 slice_count = (*buf++) + 1;
1649 slices_hdr = buf + 4;
1650 buf += 8 * slice_count;
1651 buf_size -= 1 + 8 * slice_count;
1653 slice_count = avctx->slice_count;
1655 //parse first slice header to check whether this frame can be decoded
1656 if(get_slice_offset(avctx, slices_hdr, 0) < 0 ||
1657 get_slice_offset(avctx, slices_hdr, 0) > buf_size){
1658 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1659 return AVERROR_INVALIDDATA;
1661 init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, 0), (buf_size-get_slice_offset(avctx, slices_hdr, 0))*8);
1662 if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
1663 av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
1664 return AVERROR_INVALIDDATA;
1666 if ((!s->last_picture_ptr || !s->last_picture_ptr->f.data[0]) &&
1667 si.type == AV_PICTURE_TYPE_B) {
1668 av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
1669 "reference data.\n");
1670 return AVERROR_INVALIDDATA;
1672 if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
1673 || (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
1674 || avctx->skip_frame >= AVDISCARD_ALL)
1678 if (si.start == 0) {
1679 if (s->mb_num_left > 0) {
1680 av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
1682 ff_er_frame_end(&s->er);
1683 ff_MPV_frame_end(s);
1686 if (s->width != si.width || s->height != si.height) {
1689 av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
1690 si.width, si.height);
1692 if (av_image_check_size(si.width, si.height, 0, s->avctx))
1693 return AVERROR_INVALIDDATA;
1695 s->avctx->sample_aspect_ratio = update_sar(
1696 s->width, s->height, s->avctx->sample_aspect_ratio,
1697 si.width, si.height);
1698 s->width = si.width;
1699 s->height = si.height;
1701 err = ff_set_dimensions(s->avctx, s->width, s->height);
1705 if ((err = ff_MPV_common_frame_size_change(s)) < 0)
1707 if ((err = rv34_decoder_realloc(r)) < 0)
1710 s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
1711 if (ff_MPV_frame_start(s, s->avctx) < 0)
1713 ff_mpeg_er_frame_start(s);
1714 if (!r->tmp_b_block_base) {
1717 r->tmp_b_block_base = av_malloc(s->linesize * 48);
1718 for (i = 0; i < 2; i++)
1719 r->tmp_b_block_y[i] = r->tmp_b_block_base
1720 + i * 16 * s->linesize;
1721 for (i = 0; i < 4; i++)
1722 r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
1723 + (i >> 1) * 8 * s->uvlinesize
1726 r->cur_pts = si.pts;
1727 if (s->pict_type != AV_PICTURE_TYPE_B) {
1728 r->last_pts = r->next_pts;
1729 r->next_pts = r->cur_pts;
1731 int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
1732 int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
1733 int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
1736 r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
1737 r->scaled_weight = 0;
1739 r->mv_weight1 = (dist0 << 14) / refdist;
1740 r->mv_weight2 = (dist1 << 14) / refdist;
1741 if((r->mv_weight1|r->mv_weight2) & 511){
1742 r->weight1 = r->mv_weight1;
1743 r->weight2 = r->mv_weight2;
1744 r->scaled_weight = 0;
1746 r->weight1 = r->mv_weight1 >> 9;
1747 r->weight2 = r->mv_weight2 >> 9;
1748 r->scaled_weight = 1;
1752 s->mb_x = s->mb_y = 0;
1753 ff_thread_finish_setup(s->avctx);
1754 } else if (HAVE_THREADS &&
1755 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1756 av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
1757 "multithreading mode (start MB is %d).\n", si.start);
1758 return AVERROR_INVALIDDATA;
1761 for(i = 0; i < slice_count; i++){
1762 int offset = get_slice_offset(avctx, slices_hdr, i);
1764 if(i+1 == slice_count)
1765 size = buf_size - offset;
1767 size = get_slice_offset(avctx, slices_hdr, i+1) - offset;
1769 if(offset < 0 || offset > buf_size){
1770 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1774 r->si.end = s->mb_width * s->mb_height;
1775 s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
1777 if(i+1 < slice_count){
1778 if (get_slice_offset(avctx, slices_hdr, i+1) < 0 ||
1779 get_slice_offset(avctx, slices_hdr, i+1) > buf_size) {
1780 av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
1783 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);
1784 if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
1785 if(i+2 < slice_count)
1786 size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
1788 size = buf_size - offset;
1790 r->si.end = si.start;
1792 if (size < 0 || size > buf_size - offset) {
1793 av_log(avctx, AV_LOG_ERROR, "Slice size is invalid\n");
1796 last = rv34_decode_slice(r, r->si.end, buf + offset, size);
1801 if (s->current_picture_ptr) {
1804 r->loop_filter(r, s->mb_height - 1);
1806 ret = finish_frame(avctx, pict);
1809 *got_picture_ptr = ret;
1810 } else if (HAVE_THREADS &&
1811 (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
1812 av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
1813 /* always mark the current frame as finished, frame-mt supports
1814 * only complete frames */
1815 ff_er_frame_end(&s->er);
1816 ff_MPV_frame_end(s);
1818 ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
1819 return AVERROR_INVALIDDATA;
1826 av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
1828 RV34DecContext *r = avctx->priv_data;
1830 ff_MPV_common_end(&r->s);
1831 rv34_decoder_free(r);