2 * H.26L/H.264/AVC/JVT/14496-10/... cavlc bitstream decoding
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
32 #include "mpegvideo.h"
34 #include "h264data.h" // FIXME FIXME FIXME
35 #include "h264_mvpred.h"
41 static const uint8_t golomb_to_inter_cbp_gray[16]={
42 0, 1, 2, 4, 8, 3, 5,10,12,15, 7,11,13,14, 6, 9,
45 static const uint8_t golomb_to_intra4x4_cbp_gray[16]={
46 15, 0, 7,11,13,14, 3, 5,10,12, 1, 2, 4, 8, 6, 9,
49 static const uint8_t chroma_dc_coeff_token_len[4*5]={
57 static const uint8_t chroma_dc_coeff_token_bits[4*5]={
65 static const uint8_t chroma422_dc_coeff_token_len[4*9]={
77 static const uint8_t chroma422_dc_coeff_token_bits[4*9]={
89 static const uint8_t coeff_token_len[4][4*17]={
92 6, 2, 0, 0, 8, 6, 3, 0, 9, 8, 7, 5, 10, 9, 8, 6,
93 11,10, 9, 7, 13,11,10, 8, 13,13,11, 9, 13,13,13,10,
94 14,14,13,11, 14,14,14,13, 15,15,14,14, 15,15,15,14,
95 16,15,15,15, 16,16,16,15, 16,16,16,16, 16,16,16,16,
99 6, 2, 0, 0, 6, 5, 3, 0, 7, 6, 6, 4, 8, 6, 6, 4,
100 8, 7, 7, 5, 9, 8, 8, 6, 11, 9, 9, 6, 11,11,11, 7,
101 12,11,11, 9, 12,12,12,11, 12,12,12,11, 13,13,13,12,
102 13,13,13,13, 13,14,13,13, 14,14,14,13, 14,14,14,14,
106 6, 4, 0, 0, 6, 5, 4, 0, 6, 5, 5, 4, 7, 5, 5, 4,
107 7, 5, 5, 4, 7, 6, 6, 4, 7, 6, 6, 4, 8, 7, 7, 5,
108 8, 8, 7, 6, 9, 8, 8, 7, 9, 9, 8, 8, 9, 9, 9, 8,
109 10, 9, 9, 9, 10,10,10,10, 10,10,10,10, 10,10,10,10,
113 6, 6, 0, 0, 6, 6, 6, 0, 6, 6, 6, 6, 6, 6, 6, 6,
114 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
115 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
116 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
120 static const uint8_t coeff_token_bits[4][4*17]={
123 5, 1, 0, 0, 7, 4, 1, 0, 7, 6, 5, 3, 7, 6, 5, 3,
124 7, 6, 5, 4, 15, 6, 5, 4, 11,14, 5, 4, 8,10,13, 4,
125 15,14, 9, 4, 11,10,13,12, 15,14, 9,12, 11,10,13, 8,
126 15, 1, 9,12, 11,14,13, 8, 7,10, 9,12, 4, 6, 5, 8,
130 11, 2, 0, 0, 7, 7, 3, 0, 7,10, 9, 5, 7, 6, 5, 4,
131 4, 6, 5, 6, 7, 6, 5, 8, 15, 6, 5, 4, 11,14,13, 4,
132 15,10, 9, 4, 11,14,13,12, 8,10, 9, 8, 15,14,13,12,
133 11,10, 9,12, 7,11, 6, 8, 9, 8,10, 1, 7, 6, 5, 4,
137 15,14, 0, 0, 11,15,13, 0, 8,12,14,12, 15,10,11,11,
138 11, 8, 9,10, 9,14,13, 9, 8,10, 9, 8, 15,14,13,13,
139 11,14,10,12, 15,10,13,12, 11,14, 9,12, 8,10,13, 8,
140 13, 7, 9,12, 9,12,11,10, 5, 8, 7, 6, 1, 4, 3, 2,
144 0, 1, 0, 0, 4, 5, 6, 0, 8, 9,10,11, 12,13,14,15,
145 16,17,18,19, 20,21,22,23, 24,25,26,27, 28,29,30,31,
146 32,33,34,35, 36,37,38,39, 40,41,42,43, 44,45,46,47,
147 48,49,50,51, 52,53,54,55, 56,57,58,59, 60,61,62,63,
151 static const uint8_t total_zeros_len[16][16]= {
152 {1,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9},
153 {3,3,3,3,3,4,4,4,4,5,5,6,6,6,6},
154 {4,3,3,3,4,4,3,3,4,5,5,6,5,6},
155 {5,3,4,4,3,3,3,4,3,4,5,5,5},
156 {4,4,4,3,3,3,3,3,4,5,4,5},
157 {6,5,3,3,3,3,3,3,4,3,6},
158 {6,5,3,3,3,2,3,4,3,6},
169 static const uint8_t total_zeros_bits[16][16]= {
170 {1,3,2,3,2,3,2,3,2,3,2,3,2,3,2,1},
171 {7,6,5,4,3,5,4,3,2,3,2,3,2,1,0},
172 {5,7,6,5,4,3,4,3,2,3,2,1,1,0},
173 {3,7,5,4,6,5,4,3,3,2,2,1,0},
174 {5,4,3,7,6,5,4,3,2,1,1,0},
175 {1,1,7,6,5,4,3,2,1,1,0},
176 {1,1,5,4,3,3,2,1,1,0},
187 static const uint8_t chroma_dc_total_zeros_len[3][4]= {
193 static const uint8_t chroma_dc_total_zeros_bits[3][4]= {
199 static const uint8_t chroma422_dc_total_zeros_len[7][8]= {
200 { 1, 3, 3, 4, 4, 4, 5, 5 },
201 { 3, 2, 3, 3, 3, 3, 3 },
202 { 3, 3, 2, 2, 3, 3 },
209 static const uint8_t chroma422_dc_total_zeros_bits[7][8]= {
210 { 1, 2, 3, 2, 3, 1, 1, 0 },
211 { 0, 1, 1, 4, 5, 6, 7 },
212 { 0, 1, 1, 2, 6, 7 },
219 static const uint8_t run_len[7][16]={
226 {3,3,3,3,3,3,3,4,5,6,7,8,9,10,11},
229 static const uint8_t run_bits[7][16]={
236 {7,6,5,4,3,2,1,1,1,1,1,1,1,1,1},
239 static VLC coeff_token_vlc[4];
240 static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
241 static const int coeff_token_vlc_tables_size[4]={520,332,280,256};
243 static VLC chroma_dc_coeff_token_vlc;
244 static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
245 static const int chroma_dc_coeff_token_vlc_table_size = 256;
247 static VLC chroma422_dc_coeff_token_vlc;
248 static VLC_TYPE chroma422_dc_coeff_token_vlc_table[8192][2];
249 static const int chroma422_dc_coeff_token_vlc_table_size = 8192;
251 static VLC total_zeros_vlc[15];
252 static VLC_TYPE total_zeros_vlc_tables[15][512][2];
253 static const int total_zeros_vlc_tables_size = 512;
255 static VLC chroma_dc_total_zeros_vlc[3];
256 static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
257 static const int chroma_dc_total_zeros_vlc_tables_size = 8;
259 static VLC chroma422_dc_total_zeros_vlc[7];
260 static VLC_TYPE chroma422_dc_total_zeros_vlc_tables[7][32][2];
261 static const int chroma422_dc_total_zeros_vlc_tables_size = 32;
263 static VLC run_vlc[6];
264 static VLC_TYPE run_vlc_tables[6][8][2];
265 static const int run_vlc_tables_size = 8;
268 static VLC_TYPE run7_vlc_table[96][2];
269 static const int run7_vlc_table_size = 96;
271 #define LEVEL_TAB_BITS 8
272 static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];
274 #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
275 #define CHROMA422_DC_COEFF_TOKEN_VLC_BITS 13
276 #define COEFF_TOKEN_VLC_BITS 8
277 #define TOTAL_ZEROS_VLC_BITS 9
278 #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
279 #define CHROMA422_DC_TOTAL_ZEROS_VLC_BITS 5
280 #define RUN_VLC_BITS 3
281 #define RUN7_VLC_BITS 6
284 * Get the predicted number of non-zero coefficients.
285 * @param n block index
287 static inline int pred_non_zero_count(H264Context *h, int n){
288 const int index8= scan8[n];
289 const int left= h->non_zero_count_cache[index8 - 1];
290 const int top = h->non_zero_count_cache[index8 - 8];
293 if(i<64) i= (i+1)>>1;
295 tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
300 static av_cold void init_cavlc_level_tab(void){
304 for(suffix_length=0; suffix_length<7; suffix_length++){
305 for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
306 int prefix= LEVEL_TAB_BITS - av_log2(2*i);
308 if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
309 int level_code = (prefix << suffix_length) +
310 (i >> (av_log2(i) - suffix_length)) - (1 << suffix_length);
311 int mask = -(level_code&1);
312 level_code = (((2 + level_code) >> 1) ^ mask) - mask;
313 cavlc_level_tab[suffix_length][i][0]= level_code;
314 cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
315 }else if(prefix + 1 <= LEVEL_TAB_BITS){
316 cavlc_level_tab[suffix_length][i][0]= prefix+100;
317 cavlc_level_tab[suffix_length][i][1]= prefix + 1;
319 cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
320 cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
326 av_cold void ff_h264_decode_init_vlc(void){
334 chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
335 chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
336 init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
337 &chroma_dc_coeff_token_len [0], 1, 1,
338 &chroma_dc_coeff_token_bits[0], 1, 1,
339 INIT_VLC_USE_NEW_STATIC);
341 chroma422_dc_coeff_token_vlc.table = chroma422_dc_coeff_token_vlc_table;
342 chroma422_dc_coeff_token_vlc.table_allocated = chroma422_dc_coeff_token_vlc_table_size;
343 init_vlc(&chroma422_dc_coeff_token_vlc, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 4*9,
344 &chroma422_dc_coeff_token_len [0], 1, 1,
345 &chroma422_dc_coeff_token_bits[0], 1, 1,
346 INIT_VLC_USE_NEW_STATIC);
350 coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
351 coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
352 init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
353 &coeff_token_len [i][0], 1, 1,
354 &coeff_token_bits[i][0], 1, 1,
355 INIT_VLC_USE_NEW_STATIC);
356 offset += coeff_token_vlc_tables_size[i];
359 * This is a one time safety check to make sure that
360 * the packed static coeff_token_vlc table sizes
361 * were initialized correctly.
363 assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
366 chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
367 chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
368 init_vlc(&chroma_dc_total_zeros_vlc[i],
369 CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
370 &chroma_dc_total_zeros_len [i][0], 1, 1,
371 &chroma_dc_total_zeros_bits[i][0], 1, 1,
372 INIT_VLC_USE_NEW_STATIC);
376 chroma422_dc_total_zeros_vlc[i].table = chroma422_dc_total_zeros_vlc_tables[i];
377 chroma422_dc_total_zeros_vlc[i].table_allocated = chroma422_dc_total_zeros_vlc_tables_size;
378 init_vlc(&chroma422_dc_total_zeros_vlc[i],
379 CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 8,
380 &chroma422_dc_total_zeros_len [i][0], 1, 1,
381 &chroma422_dc_total_zeros_bits[i][0], 1, 1,
382 INIT_VLC_USE_NEW_STATIC);
386 total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
387 total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
388 init_vlc(&total_zeros_vlc[i],
389 TOTAL_ZEROS_VLC_BITS, 16,
390 &total_zeros_len [i][0], 1, 1,
391 &total_zeros_bits[i][0], 1, 1,
392 INIT_VLC_USE_NEW_STATIC);
396 run_vlc[i].table = run_vlc_tables[i];
397 run_vlc[i].table_allocated = run_vlc_tables_size;
398 init_vlc(&run_vlc[i],
400 &run_len [i][0], 1, 1,
401 &run_bits[i][0], 1, 1,
402 INIT_VLC_USE_NEW_STATIC);
404 run7_vlc.table = run7_vlc_table,
405 run7_vlc.table_allocated = run7_vlc_table_size;
406 init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
407 &run_len [6][0], 1, 1,
408 &run_bits[6][0], 1, 1,
409 INIT_VLC_USE_NEW_STATIC);
411 init_cavlc_level_tab();
418 static inline int get_level_prefix(GetBitContext *gb){
423 UPDATE_CACHE(re, gb);
424 buf=GET_CACHE(re, gb);
426 log= 32 - av_log2(buf);
428 print_bin(buf>>(32-log), log);
429 av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
432 LAST_SKIP_BITS(re, gb, log);
433 CLOSE_READER(re, gb);
439 * Decode a residual block.
440 * @param n block index
441 * @param scantable scantable
442 * @param max_coeff number of coefficients in the block
443 * @return <0 if an error occurred
445 static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
446 MpegEncContext * const s = &h->s;
447 static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
449 int zeros_left, coeff_token, total_coeff, i, trailing_ones, run_before;
451 //FIXME put trailing_onex into the context
455 coeff_token = get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
457 coeff_token = get_vlc2(gb, chroma422_dc_coeff_token_vlc.table, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 1);
458 total_coeff= coeff_token>>2;
460 if(n >= LUMA_DC_BLOCK_INDEX){
461 total_coeff= pred_non_zero_count(h, (n - LUMA_DC_BLOCK_INDEX)*16);
462 coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
463 total_coeff= coeff_token>>2;
465 total_coeff= pred_non_zero_count(h, n);
466 coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
467 total_coeff= coeff_token>>2;
470 h->non_zero_count_cache[ scan8[n] ]= total_coeff;
472 //FIXME set last_non_zero?
476 if(total_coeff > (unsigned)max_coeff) {
477 av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
481 trailing_ones= coeff_token&3;
482 tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
483 assert(total_coeff<=16);
485 i = show_bits(gb, 3);
486 skip_bits(gb, trailing_ones);
487 level[0] = 1-((i&4)>>1);
488 level[1] = 1-((i&2) );
489 level[2] = 1-((i&1)<<1);
491 if(trailing_ones<total_coeff) {
493 int suffix_length = total_coeff > 10 & trailing_ones < 3;
494 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
495 int level_code= cavlc_level_tab[suffix_length][bitsi][0];
497 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
498 if(level_code >= 100){
499 prefix= level_code - 100;
500 if(prefix == LEVEL_TAB_BITS)
501 prefix += get_level_prefix(gb);
503 //first coefficient has suffix_length equal to 0 or 1
504 if(prefix<14){ //FIXME try to build a large unified VLC table for all this
506 level_code= (prefix<<1) + get_bits1(gb); //part
508 level_code= prefix; //part
509 }else if(prefix==14){
511 level_code= (prefix<<1) + get_bits1(gb); //part
513 level_code= prefix + get_bits(gb, 4); //part
515 level_code= 30 + get_bits(gb, prefix-3); //part
518 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid level prefix\n");
521 level_code += (1<<(prefix-3))-4096;
525 if(trailing_ones < 3) level_code += 2;
528 mask= -(level_code&1);
529 level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
531 level_code += ((level_code>>31)|1) & -(trailing_ones < 3);
533 suffix_length = 1 + (level_code + 3U > 6U);
534 level[trailing_ones]= level_code;
537 //remaining coefficients have suffix_length > 0
538 for(i=trailing_ones+1;i<total_coeff;i++) {
539 static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
540 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
541 level_code= cavlc_level_tab[suffix_length][bitsi][0];
543 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
544 if(level_code >= 100){
545 prefix= level_code - 100;
546 if(prefix == LEVEL_TAB_BITS){
547 prefix += get_level_prefix(gb);
550 level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
552 level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
554 level_code += (1<<(prefix-3))-4096;
556 mask= -(level_code&1);
557 level_code= (((2+level_code)>>1) ^ mask) - mask;
559 level[i]= level_code;
560 suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length];
564 if(total_coeff == max_coeff)
567 if (max_coeff <= 8) {
569 zeros_left = get_vlc2(gb, chroma_dc_total_zeros_vlc[total_coeff - 1].table,
570 CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
572 zeros_left = get_vlc2(gb, chroma422_dc_total_zeros_vlc[total_coeff - 1].table,
573 CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 1);
575 zeros_left= get_vlc2(gb, total_zeros_vlc[total_coeff - 1].table, TOTAL_ZEROS_VLC_BITS, 1);
579 #define STORE_BLOCK(type) \
580 scantable += zeros_left + total_coeff - 1; \
581 if(n >= LUMA_DC_BLOCK_INDEX){ \
582 ((type*)block)[*scantable] = level[0]; \
583 for(i=1;i<total_coeff && zeros_left > 0;i++) { \
585 run_before= get_vlc2(gb, run_vlc[zeros_left - 1].table, RUN_VLC_BITS, 1); \
587 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
588 zeros_left -= run_before; \
589 scantable -= 1 + run_before; \
590 ((type*)block)[*scantable]= level[i]; \
592 for(;i<total_coeff;i++) { \
594 ((type*)block)[*scantable]= level[i]; \
597 ((type*)block)[*scantable] = ((int)(level[0] * qmul[*scantable] + 32))>>6; \
598 for(i=1;i<total_coeff && zeros_left > 0;i++) { \
600 run_before= get_vlc2(gb, run_vlc[zeros_left - 1].table, RUN_VLC_BITS, 1); \
602 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
603 zeros_left -= run_before; \
604 scantable -= 1 + run_before; \
605 ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
607 for(;i<total_coeff;i++) { \
609 ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
613 if (zeros_left < 0) {
614 av_log(h->s.avctx, AV_LOG_ERROR,
615 "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
616 return AVERROR_INVALIDDATA;
619 if (h->pixel_shift) {
628 static av_always_inline int decode_luma_residual(H264Context *h, GetBitContext *gb, const uint8_t *scan, const uint8_t *scan8x8, int pixel_shift, int mb_type, int cbp, int p){
630 MpegEncContext * const s = &h->s;
631 int qscale = p == 0 ? s->qscale : h->chroma_qp[p-1];
632 if(IS_INTRA16x16(mb_type)){
633 AV_ZERO128(h->mb_luma_dc[p]+0);
634 AV_ZERO128(h->mb_luma_dc[p]+8);
635 AV_ZERO128(h->mb_luma_dc[p]+16);
636 AV_ZERO128(h->mb_luma_dc[p]+24);
637 if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc[p], LUMA_DC_BLOCK_INDEX+p, scan, NULL, 16) < 0){
638 return -1; //FIXME continue if partitioned and other return -1 too
641 assert((cbp&15) == 0 || (cbp&15) == 15);
644 for(i8x8=0; i8x8<4; i8x8++){
645 for(i4x4=0; i4x4<4; i4x4++){
646 const int index= i4x4 + 4*i8x8 + p*16;
647 if( decode_residual(h, h->intra_gb_ptr, h->mb + (16*index << pixel_shift),
648 index, scan + 1, h->dequant4_coeff[p][qscale], 15) < 0 ){
655 fill_rectangle(&h->non_zero_count_cache[scan8[p*16]], 4, 4, 8, 0, 1);
659 int cqm = (IS_INTRA( mb_type ) ? 0:3)+p;
660 /* For CAVLC 4:4:4, we need to keep track of the luma 8x8 CBP for deblocking nnz purposes. */
662 for(i8x8=0; i8x8<4; i8x8++){
664 if(IS_8x8DCT(mb_type)){
665 DCTELEM *buf = &h->mb[64*i8x8+256*p << pixel_shift];
667 for(i4x4=0; i4x4<4; i4x4++){
668 const int index= i4x4 + 4*i8x8 + p*16;
669 if( decode_residual(h, gb, buf, index, scan8x8+16*i4x4,
670 h->dequant8_coeff[cqm][qscale], 16) < 0 )
673 nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
674 nnz[0] += nnz[1] + nnz[8] + nnz[9];
675 new_cbp |= !!nnz[0] << i8x8;
677 for(i4x4=0; i4x4<4; i4x4++){
678 const int index= i4x4 + 4*i8x8 + p*16;
679 if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index,
680 scan, h->dequant4_coeff[cqm][qscale], 16) < 0 ){
683 new_cbp |= h->non_zero_count_cache[ scan8[index] ] << i8x8;
687 uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ];
688 nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
695 int ff_h264_decode_mb_cavlc(H264Context *h){
696 MpegEncContext * const s = &h->s;
699 unsigned int mb_type, cbp;
700 int dct8x8_allowed= h->pps.transform_8x8_mode;
701 int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2;
702 const int pixel_shift = h->pixel_shift;
704 mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
706 tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
707 cbp = 0; /* avoid warning. FIXME: find a solution without slowing
709 if(h->slice_type_nos != AV_PICTURE_TYPE_I){
710 if(s->mb_skip_run==-1)
711 s->mb_skip_run= get_ue_golomb(&s->gb);
713 if (s->mb_skip_run--) {
714 if(FRAME_MBAFF && (s->mb_y&1) == 0){
715 if(s->mb_skip_run==0)
716 h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
723 if( (s->mb_y&1) == 0 )
724 h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
727 h->prev_mb_skipped= 0;
729 mb_type= get_ue_golomb(&s->gb);
730 if(h->slice_type_nos == AV_PICTURE_TYPE_B){
732 partition_count= b_mb_type_info[mb_type].partition_count;
733 mb_type= b_mb_type_info[mb_type].type;
736 goto decode_intra_mb;
738 }else if(h->slice_type_nos == AV_PICTURE_TYPE_P){
740 partition_count= p_mb_type_info[mb_type].partition_count;
741 mb_type= p_mb_type_info[mb_type].type;
744 goto decode_intra_mb;
747 assert(h->slice_type_nos == AV_PICTURE_TYPE_I);
748 if(h->slice_type == AV_PICTURE_TYPE_SI && mb_type)
752 av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_picture_type_char(h->slice_type), s->mb_x, s->mb_y);
756 cbp= i_mb_type_info[mb_type].cbp;
757 h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
758 mb_type= i_mb_type_info[mb_type].type;
762 mb_type |= MB_TYPE_INTERLACED;
764 h->slice_table[ mb_xy ]= h->slice_num;
766 if(IS_INTRA_PCM(mb_type)){
768 const int mb_size = ff_h264_mb_sizes[h->sps.chroma_format_idc] *
769 h->sps.bit_depth_luma >> 3;
771 // We assume these blocks are very rare so we do not optimize it.
772 align_get_bits(&s->gb);
774 // The pixels are stored in the same order as levels in h->mb array.
775 for(x=0; x < mb_size; x++){
776 ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
779 // In deblocking, the quantizer is 0
780 s->current_picture.f.qscale_table[mb_xy] = 0;
781 // All coeffs are present
782 memset(h->non_zero_count[mb_xy], 16, 48);
784 s->current_picture.f.mb_type[mb_xy] = mb_type;
788 fill_decode_neighbors(h, mb_type);
789 fill_decode_caches(h, mb_type);
792 if(IS_INTRA(mb_type)){
794 // init_top_left_availability(h);
795 if(IS_INTRA4x4(mb_type)){
798 if(dct8x8_allowed && get_bits1(&s->gb)){
799 mb_type |= MB_TYPE_8x8DCT;
803 // fill_intra4x4_pred_table(h);
804 for(i=0; i<16; i+=di){
805 int mode= pred_intra_mode(h, i);
807 if(!get_bits1(&s->gb)){
808 const int rem_mode= get_bits(&s->gb, 3);
809 mode = rem_mode + (rem_mode >= mode);
813 fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
815 h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
817 write_back_intra_pred_mode(h);
818 if( ff_h264_check_intra4x4_pred_mode(h) < 0)
821 h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode, 0);
822 if(h->intra16x16_pred_mode < 0)
826 pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&s->gb), 1);
829 h->chroma_pred_mode= pred_mode;
831 h->chroma_pred_mode = DC_128_PRED8x8;
833 }else if(partition_count==4){
834 int i, j, sub_partition_count[4], list, ref[2][4];
836 if(h->slice_type_nos == AV_PICTURE_TYPE_B){
838 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
839 if(h->sub_mb_type[i] >=13){
840 av_log(h->s.avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
843 sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
844 h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
846 if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) {
847 ff_h264_pred_direct_motion(h, &mb_type);
848 h->ref_cache[0][scan8[4]] =
849 h->ref_cache[1][scan8[4]] =
850 h->ref_cache[0][scan8[12]] =
851 h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
854 assert(h->slice_type_nos == AV_PICTURE_TYPE_P); //FIXME SP correct ?
856 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
857 if(h->sub_mb_type[i] >=4){
858 av_log(h->s.avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
861 sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
862 h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
866 for(list=0; list<h->list_count; list++){
867 int ref_count = IS_REF0(mb_type) ? 1 : h->ref_count[list] << MB_MBAFF;
869 if(IS_DIRECT(h->sub_mb_type[i])) continue;
870 if(IS_DIR(h->sub_mb_type[i], 0, list)){
874 }else if(ref_count == 2){
875 tmp= get_bits1(&s->gb)^1;
877 tmp= get_ue_golomb_31(&s->gb);
879 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
892 dct8x8_allowed = get_dct8x8_allowed(h);
894 for(list=0; list<h->list_count; list++){
896 if(IS_DIRECT(h->sub_mb_type[i])) {
897 h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
900 h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ]=
901 h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
903 if(IS_DIR(h->sub_mb_type[i], 0, list)){
904 const int sub_mb_type= h->sub_mb_type[i];
905 const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
906 for(j=0; j<sub_partition_count[i]; j++){
908 const int index= 4*i + block_width*j;
909 int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
910 pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
911 mx += get_se_golomb(&s->gb);
912 my += get_se_golomb(&s->gb);
913 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
915 if(IS_SUB_8X8(sub_mb_type)){
917 mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
919 mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
920 }else if(IS_SUB_8X4(sub_mb_type)){
921 mv_cache[ 1 ][0]= mx;
922 mv_cache[ 1 ][1]= my;
923 }else if(IS_SUB_4X8(sub_mb_type)){
924 mv_cache[ 8 ][0]= mx;
925 mv_cache[ 8 ][1]= my;
927 mv_cache[ 0 ][0]= mx;
928 mv_cache[ 0 ][1]= my;
931 uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
937 }else if(IS_DIRECT(mb_type)){
938 ff_h264_pred_direct_motion(h, &mb_type);
939 dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
942 //FIXME we should set ref_idx_l? to 0 if we use that later ...
943 if(IS_16X16(mb_type)){
944 for(list=0; list<h->list_count; list++){
946 if(IS_DIR(mb_type, 0, list)){
947 int rc = h->ref_count[list] << MB_MBAFF;
950 } else if (rc == 2) {
951 val= get_bits1(&s->gb)^1;
953 val= get_ue_golomb_31(&s->gb);
955 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
959 fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
962 for(list=0; list<h->list_count; list++){
963 if(IS_DIR(mb_type, 0, list)){
964 pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
965 mx += get_se_golomb(&s->gb);
966 my += get_se_golomb(&s->gb);
967 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
969 fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
973 else if(IS_16X8(mb_type)){
974 for(list=0; list<h->list_count; list++){
977 if(IS_DIR(mb_type, i, list)){
978 int rc = h->ref_count[list] << MB_MBAFF;
981 } else if (rc == 2) {
982 val= get_bits1(&s->gb)^1;
984 val= get_ue_golomb_31(&s->gb);
986 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
991 val= LIST_NOT_USED&0xFF;
992 fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
995 for(list=0; list<h->list_count; list++){
998 if(IS_DIR(mb_type, i, list)){
999 pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
1000 mx += get_se_golomb(&s->gb);
1001 my += get_se_golomb(&s->gb);
1002 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1004 val= pack16to32(mx,my);
1007 fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
1011 assert(IS_8X16(mb_type));
1012 for(list=0; list<h->list_count; list++){
1015 if(IS_DIR(mb_type, i, list)){ //FIXME optimize
1016 int rc = h->ref_count[list] << MB_MBAFF;
1019 } else if (rc == 2) {
1020 val= get_bits1(&s->gb)^1;
1022 val= get_ue_golomb_31(&s->gb);
1024 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
1029 val= LIST_NOT_USED&0xFF;
1030 fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
1033 for(list=0; list<h->list_count; list++){
1036 if(IS_DIR(mb_type, i, list)){
1037 pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
1038 mx += get_se_golomb(&s->gb);
1039 my += get_se_golomb(&s->gb);
1040 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
1042 val= pack16to32(mx,my);
1045 fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
1051 if(IS_INTER(mb_type))
1052 write_back_motion(h, mb_type);
1054 if(!IS_INTRA16x16(mb_type)){
1055 cbp= get_ue_golomb(&s->gb);
1059 av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
1062 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
1063 else cbp= golomb_to_inter_cbp [cbp];
1066 av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
1069 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
1070 else cbp= golomb_to_inter_cbp_gray[cbp];
1074 if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
1075 mb_type |= MB_TYPE_8x8DCT*get_bits1(&s->gb);
1078 h->cbp_table[mb_xy]= cbp;
1079 s->current_picture.f.mb_type[mb_xy] = mb_type;
1081 if(cbp || IS_INTRA16x16(mb_type)){
1082 int i4x4, i8x8, chroma_idx;
1085 GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
1086 const uint8_t *scan, *scan8x8;
1087 const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
1089 if(IS_INTERLACED(mb_type)){
1090 scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
1091 scan= s->qscale ? h->field_scan : h->field_scan_q0;
1093 scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
1094 scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
1097 dquant= get_se_golomb(&s->gb);
1099 s->qscale += dquant;
1101 if(((unsigned)s->qscale) > max_qp){
1102 if(s->qscale<0) s->qscale+= max_qp+1;
1103 else s->qscale-= max_qp+1;
1104 if(((unsigned)s->qscale) > max_qp){
1105 av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y);
1110 h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale);
1111 h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale);
1113 if( (ret = decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 0)) < 0 ){
1116 h->cbp_table[mb_xy] |= ret << 12;
1118 if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 1) < 0 ){
1121 if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ){
1124 } else if (CHROMA422) {
1126 for(chroma_idx=0; chroma_idx<2; chroma_idx++)
1127 if (decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift),
1128 CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma422_dc_scan,
1135 for(chroma_idx=0; chroma_idx<2; chroma_idx++){
1136 const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
1137 DCTELEM *mb = h->mb + (16*(16 + 16*chroma_idx) << pixel_shift);
1138 for (i8x8 = 0; i8x8 < 2; i8x8++) {
1139 for (i4x4 = 0; i4x4 < 4; i4x4++) {
1140 const int index = 16 + 16*chroma_idx + 8*i8x8 + i4x4;
1141 if (decode_residual(h, gb, mb, index, scan + 1, qmul, 15) < 0)
1143 mb += 16 << pixel_shift;
1148 fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
1149 fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
1151 } else /* yuv420 */ {
1153 for(chroma_idx=0; chroma_idx<2; chroma_idx++)
1154 if( decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){
1160 for(chroma_idx=0; chroma_idx<2; chroma_idx++){
1161 const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
1162 for(i4x4=0; i4x4<4; i4x4++){
1163 const int index= 16 + 16*chroma_idx + i4x4;
1164 if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan + 1, qmul, 15) < 0){
1170 fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
1171 fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
1175 fill_rectangle(&h->non_zero_count_cache[scan8[ 0]], 4, 4, 8, 0, 1);
1176 fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
1177 fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
1179 s->current_picture.f.qscale_table[mb_xy] = s->qscale;
1180 write_back_non_zero_count(h);