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 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 * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
29 #define UNCHECKED_BITSTREAM_READER 1
34 #include "h264data.h" // FIXME FIXME FIXME
35 #include "h264_mvpred.h"
37 #include "mpegutils.h"
38 #include "libavutil/avassert.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(const H264Context *h, H264SliceContext *sl, int n)
289 const int index8= scan8[n];
290 const int left = sl->non_zero_count_cache[index8 - 1];
291 const int top = sl->non_zero_count_cache[index8 - 8];
294 if(i<64) i= (i+1)>>1;
296 ff_tlog(h->avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
301 static av_cold void init_cavlc_level_tab(void){
305 for(suffix_length=0; suffix_length<7; suffix_length++){
306 for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
307 int prefix= LEVEL_TAB_BITS - av_log2(2*i);
309 if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
310 int level_code = (prefix << suffix_length) +
311 (i >> (av_log2(i) - suffix_length)) - (1 << suffix_length);
312 int mask = -(level_code&1);
313 level_code = (((2 + level_code) >> 1) ^ mask) - mask;
314 cavlc_level_tab[suffix_length][i][0]= level_code;
315 cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
316 }else if(prefix + 1 <= LEVEL_TAB_BITS){
317 cavlc_level_tab[suffix_length][i][0]= prefix+100;
318 cavlc_level_tab[suffix_length][i][1]= prefix + 1;
320 cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
321 cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
327 av_cold void ff_h264_decode_init_vlc(void){
335 chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
336 chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
337 init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
338 &chroma_dc_coeff_token_len [0], 1, 1,
339 &chroma_dc_coeff_token_bits[0], 1, 1,
340 INIT_VLC_USE_NEW_STATIC);
342 chroma422_dc_coeff_token_vlc.table = chroma422_dc_coeff_token_vlc_table;
343 chroma422_dc_coeff_token_vlc.table_allocated = chroma422_dc_coeff_token_vlc_table_size;
344 init_vlc(&chroma422_dc_coeff_token_vlc, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 4*9,
345 &chroma422_dc_coeff_token_len [0], 1, 1,
346 &chroma422_dc_coeff_token_bits[0], 1, 1,
347 INIT_VLC_USE_NEW_STATIC);
351 coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
352 coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
353 init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
354 &coeff_token_len [i][0], 1, 1,
355 &coeff_token_bits[i][0], 1, 1,
356 INIT_VLC_USE_NEW_STATIC);
357 offset += coeff_token_vlc_tables_size[i];
360 * This is a one time safety check to make sure that
361 * the packed static coeff_token_vlc table sizes
362 * were initialized correctly.
364 av_assert0(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
367 chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
368 chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
369 init_vlc(&chroma_dc_total_zeros_vlc[i],
370 CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
371 &chroma_dc_total_zeros_len [i][0], 1, 1,
372 &chroma_dc_total_zeros_bits[i][0], 1, 1,
373 INIT_VLC_USE_NEW_STATIC);
377 chroma422_dc_total_zeros_vlc[i].table = chroma422_dc_total_zeros_vlc_tables[i];
378 chroma422_dc_total_zeros_vlc[i].table_allocated = chroma422_dc_total_zeros_vlc_tables_size;
379 init_vlc(&chroma422_dc_total_zeros_vlc[i],
380 CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 8,
381 &chroma422_dc_total_zeros_len [i][0], 1, 1,
382 &chroma422_dc_total_zeros_bits[i][0], 1, 1,
383 INIT_VLC_USE_NEW_STATIC);
387 total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
388 total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
389 init_vlc(&total_zeros_vlc[i],
390 TOTAL_ZEROS_VLC_BITS, 16,
391 &total_zeros_len [i][0], 1, 1,
392 &total_zeros_bits[i][0], 1, 1,
393 INIT_VLC_USE_NEW_STATIC);
397 run_vlc[i].table = run_vlc_tables[i];
398 run_vlc[i].table_allocated = run_vlc_tables_size;
399 init_vlc(&run_vlc[i],
401 &run_len [i][0], 1, 1,
402 &run_bits[i][0], 1, 1,
403 INIT_VLC_USE_NEW_STATIC);
405 run7_vlc.table = run7_vlc_table,
406 run7_vlc.table_allocated = run7_vlc_table_size;
407 init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
408 &run_len [6][0], 1, 1,
409 &run_bits[6][0], 1, 1,
410 INIT_VLC_USE_NEW_STATIC);
412 init_cavlc_level_tab();
419 static inline int get_level_prefix(GetBitContext *gb){
424 UPDATE_CACHE(re, gb);
425 buf=GET_CACHE(re, gb);
427 log= 32 - av_log2(buf);
429 print_bin(buf>>(32-log), log);
430 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__);
433 LAST_SKIP_BITS(re, gb, log);
434 CLOSE_READER(re, gb);
440 * Decode a residual block.
441 * @param n block index
442 * @param scantable scantable
443 * @param max_coeff number of coefficients in the block
444 * @return <0 if an error occurred
446 static int decode_residual(const H264Context *h, H264SliceContext *sl,
447 GetBitContext *gb, int16_t *block, int n,
448 const uint8_t *scantable, const uint32_t *qmul,
451 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};
453 int zeros_left, coeff_token, total_coeff, i, trailing_ones, run_before;
455 //FIXME put trailing_onex into the context
459 coeff_token = get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
461 coeff_token = get_vlc2(gb, chroma422_dc_coeff_token_vlc.table, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 1);
462 total_coeff= coeff_token>>2;
464 if(n >= LUMA_DC_BLOCK_INDEX){
465 total_coeff= pred_non_zero_count(h, sl, (n - LUMA_DC_BLOCK_INDEX)*16);
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;
469 total_coeff= pred_non_zero_count(h, sl, n);
470 coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
471 total_coeff= coeff_token>>2;
474 sl->non_zero_count_cache[scan8[n]] = total_coeff;
476 //FIXME set last_non_zero?
480 if(total_coeff > (unsigned)max_coeff) {
481 av_log(h->avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", sl->mb_x, sl->mb_y, total_coeff);
485 trailing_ones= coeff_token&3;
486 ff_tlog(h->avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
487 av_assert2(total_coeff<=16);
489 i = show_bits(gb, 3);
490 skip_bits(gb, trailing_ones);
491 level[0] = 1-((i&4)>>1);
492 level[1] = 1-((i&2) );
493 level[2] = 1-((i&1)<<1);
495 if(trailing_ones<total_coeff) {
497 int suffix_length = total_coeff > 10 & trailing_ones < 3;
498 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
499 int level_code= cavlc_level_tab[suffix_length][bitsi][0];
501 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
502 if(level_code >= 100){
503 prefix= level_code - 100;
504 if(prefix == LEVEL_TAB_BITS)
505 prefix += get_level_prefix(gb);
507 //first coefficient has suffix_length equal to 0 or 1
508 if(prefix<14){ //FIXME try to build a large unified VLC table for all this
510 level_code= (prefix<<1) + get_bits1(gb); //part
512 level_code= prefix; //part
513 }else if(prefix==14){
515 level_code= (prefix<<1) + get_bits1(gb); //part
517 level_code= prefix + get_bits(gb, 4); //part
522 av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n");
525 level_code += (1<<(prefix-3))-4096;
527 level_code += get_bits(gb, prefix-3); //part
530 if(trailing_ones < 3) level_code += 2;
533 mask= -(level_code&1);
534 level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
536 level_code += ((level_code>>31)|1) & -(trailing_ones < 3);
538 suffix_length = 1 + (level_code + 3U > 6U);
539 level[trailing_ones]= level_code;
542 //remaining coefficients have suffix_length > 0
543 for(i=trailing_ones+1;i<total_coeff;i++) {
544 static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
545 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
546 level_code= cavlc_level_tab[suffix_length][bitsi][0];
548 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
549 if(level_code >= 100){
550 prefix= level_code - 100;
551 if(prefix == LEVEL_TAB_BITS){
552 prefix += get_level_prefix(gb);
555 level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
557 level_code = 15<<suffix_length;
560 av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n");
561 return AVERROR_INVALIDDATA;
563 level_code += (1<<(prefix-3))-4096;
565 level_code += get_bits(gb, prefix-3);
567 mask= -(level_code&1);
568 level_code= (((2+level_code)>>1) ^ mask) - mask;
570 level[i]= level_code;
571 suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length];
575 if(total_coeff == max_coeff)
578 if (max_coeff <= 8) {
580 zeros_left = get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[total_coeff].table,
581 CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
583 zeros_left = get_vlc2(gb, (chroma422_dc_total_zeros_vlc-1)[total_coeff].table,
584 CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 1);
586 zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1);
590 #define STORE_BLOCK(type) \
591 scantable += zeros_left + total_coeff - 1; \
592 if(n >= LUMA_DC_BLOCK_INDEX){ \
593 ((type*)block)[*scantable] = level[0]; \
594 for(i=1;i<total_coeff && zeros_left > 0;i++) { \
596 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \
598 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
599 zeros_left -= run_before; \
600 scantable -= 1 + run_before; \
601 ((type*)block)[*scantable]= level[i]; \
603 for(;i<total_coeff;i++) { \
605 ((type*)block)[*scantable]= level[i]; \
608 ((type*)block)[*scantable] = ((int)(level[0] * qmul[*scantable] + 32))>>6; \
609 for(i=1;i<total_coeff && zeros_left > 0;i++) { \
611 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \
613 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \
614 zeros_left -= run_before; \
615 scantable -= 1 + run_before; \
616 ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
618 for(;i<total_coeff;i++) { \
620 ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \
624 if (h->pixel_shift) {
631 av_log(h->avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", sl->mb_x, sl->mb_y);
638 static av_always_inline
639 int decode_luma_residual(const H264Context *h, H264SliceContext *sl,
640 GetBitContext *gb, const uint8_t *scan,
641 const uint8_t *scan8x8, int pixel_shift,
642 int mb_type, int cbp, int p)
645 int qscale = p == 0 ? sl->qscale : sl->chroma_qp[p - 1];
646 if(IS_INTRA16x16(mb_type)){
647 AV_ZERO128(sl->mb_luma_dc[p]+0);
648 AV_ZERO128(sl->mb_luma_dc[p]+8);
649 AV_ZERO128(sl->mb_luma_dc[p]+16);
650 AV_ZERO128(sl->mb_luma_dc[p]+24);
651 if (decode_residual(h, sl, gb, sl->mb_luma_dc[p], LUMA_DC_BLOCK_INDEX + p, scan, NULL, 16) < 0) {
652 return -1; //FIXME continue if partitioned and other return -1 too
655 av_assert2((cbp&15) == 0 || (cbp&15) == 15);
658 for(i8x8=0; i8x8<4; i8x8++){
659 for(i4x4=0; i4x4<4; i4x4++){
660 const int index= i4x4 + 4*i8x8 + p*16;
661 if( decode_residual(h, sl, gb, sl->mb + (16*index << pixel_shift),
662 index, scan + 1, h->dequant4_coeff[p][qscale], 15) < 0 ){
669 fill_rectangle(&sl->non_zero_count_cache[scan8[p*16]], 4, 4, 8, 0, 1);
673 int cqm = (IS_INTRA( mb_type ) ? 0:3)+p;
674 /* For CAVLC 4:4:4, we need to keep track of the luma 8x8 CBP for deblocking nnz purposes. */
676 for(i8x8=0; i8x8<4; i8x8++){
678 if(IS_8x8DCT(mb_type)){
679 int16_t *buf = &sl->mb[64*i8x8+256*p << pixel_shift];
681 for(i4x4=0; i4x4<4; i4x4++){
682 const int index= i4x4 + 4*i8x8 + p*16;
683 if( decode_residual(h, sl, gb, buf, index, scan8x8+16*i4x4,
684 h->dequant8_coeff[cqm][qscale], 16) < 0 )
687 nnz = &sl->non_zero_count_cache[scan8[4 * i8x8 + p * 16]];
688 nnz[0] += nnz[1] + nnz[8] + nnz[9];
689 new_cbp |= !!nnz[0] << i8x8;
691 for(i4x4=0; i4x4<4; i4x4++){
692 const int index= i4x4 + 4*i8x8 + p*16;
693 if( decode_residual(h, sl, gb, sl->mb + (16*index << pixel_shift), index,
694 scan, h->dequant4_coeff[cqm][qscale], 16) < 0 ){
697 new_cbp |= sl->non_zero_count_cache[scan8[index]] << i8x8;
701 uint8_t * const nnz = &sl->non_zero_count_cache[scan8[4 * i8x8 + p * 16]];
702 nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
709 int ff_h264_decode_mb_cavlc(const H264Context *h, H264SliceContext *sl)
713 unsigned int mb_type, cbp;
714 int dct8x8_allowed= h->pps.transform_8x8_mode;
715 int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2;
716 const int pixel_shift = h->pixel_shift;
718 mb_xy = sl->mb_xy = sl->mb_x + sl->mb_y*h->mb_stride;
720 ff_tlog(h->avctx, "pic:%d mb:%d/%d\n", h->frame_num, sl->mb_x, sl->mb_y);
721 cbp = 0; /* avoid warning. FIXME: find a solution without slowing
723 if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
724 if (sl->mb_skip_run == -1)
725 sl->mb_skip_run = get_ue_golomb_long(&sl->gb);
727 if (sl->mb_skip_run--) {
728 if (FRAME_MBAFF(h) && (sl->mb_y & 1) == 0) {
729 if (sl->mb_skip_run == 0)
730 sl->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
732 decode_mb_skip(h, sl);
736 if (FRAME_MBAFF(h)) {
737 if ((sl->mb_y & 1) == 0)
738 sl->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
741 sl->prev_mb_skipped = 0;
743 mb_type= get_ue_golomb(&sl->gb);
744 if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
746 partition_count= b_mb_type_info[mb_type].partition_count;
747 mb_type= b_mb_type_info[mb_type].type;
750 goto decode_intra_mb;
752 } else if (sl->slice_type_nos == AV_PICTURE_TYPE_P) {
754 partition_count= p_mb_type_info[mb_type].partition_count;
755 mb_type= p_mb_type_info[mb_type].type;
758 goto decode_intra_mb;
761 av_assert2(sl->slice_type_nos == AV_PICTURE_TYPE_I);
762 if (sl->slice_type == AV_PICTURE_TYPE_SI && mb_type)
766 av_log(h->avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_picture_type_char(sl->slice_type), sl->mb_x, sl->mb_y);
770 cbp= i_mb_type_info[mb_type].cbp;
771 sl->intra16x16_pred_mode = i_mb_type_info[mb_type].pred_mode;
772 mb_type= i_mb_type_info[mb_type].type;
776 mb_type |= MB_TYPE_INTERLACED;
778 h->slice_table[mb_xy] = sl->slice_num;
780 if(IS_INTRA_PCM(mb_type)){
781 const int mb_size = ff_h264_mb_sizes[h->sps.chroma_format_idc] *
782 h->sps.bit_depth_luma;
784 // We assume these blocks are very rare so we do not optimize it.
785 sl->intra_pcm_ptr = align_get_bits(&sl->gb);
786 if (get_bits_left(&sl->gb) < mb_size) {
787 av_log(h->avctx, AV_LOG_ERROR, "Not enough data for an intra PCM block.\n");
788 return AVERROR_INVALIDDATA;
790 skip_bits_long(&sl->gb, mb_size);
792 // In deblocking, the quantizer is 0
793 h->cur_pic.qscale_table[mb_xy] = 0;
794 // All coeffs are present
795 memset(h->non_zero_count[mb_xy], 16, 48);
797 h->cur_pic.mb_type[mb_xy] = mb_type;
801 fill_decode_neighbors(h, sl, mb_type);
802 fill_decode_caches(h, sl, mb_type);
805 if(IS_INTRA(mb_type)){
807 // init_top_left_availability(h);
808 if(IS_INTRA4x4(mb_type)){
811 if(dct8x8_allowed && get_bits1(&sl->gb)){
812 mb_type |= MB_TYPE_8x8DCT;
816 // fill_intra4x4_pred_table(h);
817 for(i=0; i<16; i+=di){
818 int mode = pred_intra_mode(h, sl, i);
820 if(!get_bits1(&sl->gb)){
821 const int rem_mode= get_bits(&sl->gb, 3);
822 mode = rem_mode + (rem_mode >= mode);
826 fill_rectangle(&sl->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1);
828 sl->intra4x4_pred_mode_cache[scan8[i]] = mode;
830 write_back_intra_pred_mode(h, sl);
831 if (ff_h264_check_intra4x4_pred_mode(h, sl) < 0)
834 sl->intra16x16_pred_mode = ff_h264_check_intra_pred_mode(h, sl, sl->intra16x16_pred_mode, 0);
835 if (sl->intra16x16_pred_mode < 0)
839 pred_mode= ff_h264_check_intra_pred_mode(h, sl, get_ue_golomb_31(&sl->gb), 1);
842 sl->chroma_pred_mode = pred_mode;
844 sl->chroma_pred_mode = DC_128_PRED8x8;
846 }else if(partition_count==4){
847 int i, j, sub_partition_count[4], list, ref[2][4];
849 if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
851 sl->sub_mb_type[i]= get_ue_golomb_31(&sl->gb);
852 if(sl->sub_mb_type[i] >=13){
853 av_log(h->avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", sl->sub_mb_type[i], sl->mb_x, sl->mb_y);
856 sub_partition_count[i]= b_sub_mb_type_info[ sl->sub_mb_type[i] ].partition_count;
857 sl->sub_mb_type[i]= b_sub_mb_type_info[ sl->sub_mb_type[i] ].type;
859 if( IS_DIRECT(sl->sub_mb_type[0]|sl->sub_mb_type[1]|sl->sub_mb_type[2]|sl->sub_mb_type[3])) {
860 ff_h264_pred_direct_motion(h, sl, &mb_type);
861 sl->ref_cache[0][scan8[4]] =
862 sl->ref_cache[1][scan8[4]] =
863 sl->ref_cache[0][scan8[12]] =
864 sl->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
867 av_assert2(sl->slice_type_nos == AV_PICTURE_TYPE_P); //FIXME SP correct ?
869 sl->sub_mb_type[i]= get_ue_golomb_31(&sl->gb);
870 if(sl->sub_mb_type[i] >=4){
871 av_log(h->avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", sl->sub_mb_type[i], sl->mb_x, sl->mb_y);
874 sub_partition_count[i]= p_sub_mb_type_info[ sl->sub_mb_type[i] ].partition_count;
875 sl->sub_mb_type[i]= p_sub_mb_type_info[ sl->sub_mb_type[i] ].type;
879 for (list = 0; list < sl->list_count; list++) {
880 int ref_count = IS_REF0(mb_type) ? 1 : sl->ref_count[list] << MB_MBAFF(sl);
882 if(IS_DIRECT(sl->sub_mb_type[i])) continue;
883 if(IS_DIR(sl->sub_mb_type[i], 0, list)){
887 }else if(ref_count == 2){
888 tmp= get_bits1(&sl->gb)^1;
890 tmp= get_ue_golomb_31(&sl->gb);
892 av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
905 dct8x8_allowed = get_dct8x8_allowed(h, sl);
907 for (list = 0; list < sl->list_count; list++) {
909 if(IS_DIRECT(sl->sub_mb_type[i])) {
910 sl->ref_cache[list][ scan8[4*i] ] = sl->ref_cache[list][ scan8[4*i]+1 ];
913 sl->ref_cache[list][ scan8[4*i] ]=sl->ref_cache[list][ scan8[4*i]+1 ]=
914 sl->ref_cache[list][ scan8[4*i]+8 ]=sl->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
916 if(IS_DIR(sl->sub_mb_type[i], 0, list)){
917 const int sub_mb_type= sl->sub_mb_type[i];
918 const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
919 for(j=0; j<sub_partition_count[i]; j++){
921 const int index= 4*i + block_width*j;
922 int16_t (* mv_cache)[2]= &sl->mv_cache[list][ scan8[index] ];
923 pred_motion(h, sl, index, block_width, list, sl->ref_cache[list][ scan8[index] ], &mx, &my);
924 mx += get_se_golomb(&sl->gb);
925 my += get_se_golomb(&sl->gb);
926 ff_tlog(h->avctx, "final mv:%d %d\n", mx, my);
928 if(IS_SUB_8X8(sub_mb_type)){
930 mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
932 mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
933 }else if(IS_SUB_8X4(sub_mb_type)){
934 mv_cache[ 1 ][0]= mx;
935 mv_cache[ 1 ][1]= my;
936 }else if(IS_SUB_4X8(sub_mb_type)){
937 mv_cache[ 8 ][0]= mx;
938 mv_cache[ 8 ][1]= my;
940 mv_cache[ 0 ][0]= mx;
941 mv_cache[ 0 ][1]= my;
944 uint32_t *p= (uint32_t *)&sl->mv_cache[list][ scan8[4*i] ][0];
950 }else if(IS_DIRECT(mb_type)){
951 ff_h264_pred_direct_motion(h, sl, &mb_type);
952 dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
955 //FIXME we should set ref_idx_l? to 0 if we use that later ...
956 if(IS_16X16(mb_type)){
957 for (list = 0; list < sl->list_count; list++) {
959 if(IS_DIR(mb_type, 0, list)){
960 unsigned rc = sl->ref_count[list] << MB_MBAFF(sl);
963 } else if (rc == 2) {
964 val= get_bits1(&sl->gb)^1;
966 val= get_ue_golomb_31(&sl->gb);
968 av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
972 fill_rectangle(&sl->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
975 for (list = 0; list < sl->list_count; list++) {
976 if(IS_DIR(mb_type, 0, list)){
977 pred_motion(h, sl, 0, 4, list, sl->ref_cache[list][ scan8[0] ], &mx, &my);
978 mx += get_se_golomb(&sl->gb);
979 my += get_se_golomb(&sl->gb);
980 ff_tlog(h->avctx, "final mv:%d %d\n", mx, my);
982 fill_rectangle(sl->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
986 else if(IS_16X8(mb_type)){
987 for (list = 0; list < sl->list_count; list++) {
990 if(IS_DIR(mb_type, i, list)){
991 unsigned rc = sl->ref_count[list] << MB_MBAFF(sl);
994 } else if (rc == 2) {
995 val= get_bits1(&sl->gb)^1;
997 val= get_ue_golomb_31(&sl->gb);
999 av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
1004 val= LIST_NOT_USED&0xFF;
1005 fill_rectangle(&sl->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
1008 for (list = 0; list < sl->list_count; list++) {
1011 if(IS_DIR(mb_type, i, list)){
1012 pred_16x8_motion(h, sl, 8*i, list, sl->ref_cache[list][scan8[0] + 16*i], &mx, &my);
1013 mx += get_se_golomb(&sl->gb);
1014 my += get_se_golomb(&sl->gb);
1015 ff_tlog(h->avctx, "final mv:%d %d\n", mx, my);
1017 val= pack16to32(mx,my);
1020 fill_rectangle(sl->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
1024 av_assert2(IS_8X16(mb_type));
1025 for (list = 0; list < sl->list_count; list++) {
1028 if(IS_DIR(mb_type, i, list)){ //FIXME optimize
1029 unsigned rc = sl->ref_count[list] << MB_MBAFF(sl);
1032 } else if (rc == 2) {
1033 val= get_bits1(&sl->gb)^1;
1035 val= get_ue_golomb_31(&sl->gb);
1037 av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
1042 val= LIST_NOT_USED&0xFF;
1043 fill_rectangle(&sl->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
1046 for (list = 0; list < sl->list_count; list++) {
1049 if(IS_DIR(mb_type, i, list)){
1050 pred_8x16_motion(h, sl, i*4, list, sl->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
1051 mx += get_se_golomb(&sl->gb);
1052 my += get_se_golomb(&sl->gb);
1053 ff_tlog(h->avctx, "final mv:%d %d\n", mx, my);
1055 val= pack16to32(mx,my);
1058 fill_rectangle(sl->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
1064 if(IS_INTER(mb_type))
1065 write_back_motion(h, sl, mb_type);
1067 if(!IS_INTRA16x16(mb_type)){
1068 cbp= get_ue_golomb(&sl->gb);
1072 av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, sl->mb_x, sl->mb_y);
1075 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
1076 else cbp= golomb_to_inter_cbp [cbp];
1079 av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, sl->mb_x, sl->mb_y);
1082 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
1083 else cbp= golomb_to_inter_cbp_gray[cbp];
1086 if (!decode_chroma && cbp>15) {
1087 av_log(h->avctx, AV_LOG_ERROR, "gray chroma\n");
1088 return AVERROR_INVALIDDATA;
1092 if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
1093 mb_type |= MB_TYPE_8x8DCT*get_bits1(&sl->gb);
1096 h->cbp_table[mb_xy]= cbp;
1097 h->cur_pic.mb_type[mb_xy] = mb_type;
1099 if(cbp || IS_INTRA16x16(mb_type)){
1100 int i4x4, i8x8, chroma_idx;
1103 GetBitContext *gb = &sl->gb;
1104 const uint8_t *scan, *scan8x8;
1105 const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8);
1107 if(IS_INTERLACED(mb_type)){
1108 scan8x8 = sl->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
1109 scan = sl->qscale ? h->field_scan : h->field_scan_q0;
1111 scan8x8 = sl->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
1112 scan = sl->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
1115 dquant= get_se_golomb(&sl->gb);
1117 sl->qscale += dquant;
1119 if (((unsigned)sl->qscale) > max_qp){
1120 if (sl->qscale < 0) sl->qscale += max_qp + 1;
1121 else sl->qscale -= max_qp+1;
1122 if (((unsigned)sl->qscale) > max_qp){
1123 av_log(h->avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, sl->mb_x, sl->mb_y);
1128 sl->chroma_qp[0] = get_chroma_qp(h, 0, sl->qscale);
1129 sl->chroma_qp[1] = get_chroma_qp(h, 1, sl->qscale);
1131 if ((ret = decode_luma_residual(h, sl, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 0)) < 0 ) {
1134 h->cbp_table[mb_xy] |= ret << 12;
1136 if (decode_luma_residual(h, sl, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 1) < 0 ) {
1139 if (decode_luma_residual(h, sl, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ) {
1143 const int num_c8x8 = h->sps.chroma_format_idc;
1146 for(chroma_idx=0; chroma_idx<2; chroma_idx++)
1147 if (decode_residual(h, sl, gb, sl->mb + ((256 + 16*16*chroma_idx) << pixel_shift),
1148 CHROMA_DC_BLOCK_INDEX+chroma_idx,
1149 CHROMA422(h) ? chroma422_dc_scan : chroma_dc_scan,
1150 NULL, 4*num_c8x8) < 0) {
1156 for(chroma_idx=0; chroma_idx<2; chroma_idx++){
1157 const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][sl->chroma_qp[chroma_idx]];
1158 int16_t *mb = sl->mb + (16*(16 + 16*chroma_idx) << pixel_shift);
1159 for (i8x8 = 0; i8x8<num_c8x8; i8x8++) {
1160 for (i4x4 = 0; i4x4 < 4; i4x4++) {
1161 const int index = 16 + 16*chroma_idx + 8*i8x8 + i4x4;
1162 if (decode_residual(h, sl, gb, mb, index, scan + 1, qmul, 15) < 0)
1164 mb += 16 << pixel_shift;
1169 fill_rectangle(&sl->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
1170 fill_rectangle(&sl->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
1174 fill_rectangle(&sl->non_zero_count_cache[scan8[ 0]], 4, 4, 8, 0, 1);
1175 fill_rectangle(&sl->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1);
1176 fill_rectangle(&sl->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1);
1178 h->cur_pic.qscale_table[mb_xy] = sl->qscale;
1179 write_back_non_zero_count(h, sl);