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>
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 coeff_token_len[4][4*17]={
68 6, 2, 0, 0, 8, 6, 3, 0, 9, 8, 7, 5, 10, 9, 8, 6,
69 11,10, 9, 7, 13,11,10, 8, 13,13,11, 9, 13,13,13,10,
70 14,14,13,11, 14,14,14,13, 15,15,14,14, 15,15,15,14,
71 16,15,15,15, 16,16,16,15, 16,16,16,16, 16,16,16,16,
75 6, 2, 0, 0, 6, 5, 3, 0, 7, 6, 6, 4, 8, 6, 6, 4,
76 8, 7, 7, 5, 9, 8, 8, 6, 11, 9, 9, 6, 11,11,11, 7,
77 12,11,11, 9, 12,12,12,11, 12,12,12,11, 13,13,13,12,
78 13,13,13,13, 13,14,13,13, 14,14,14,13, 14,14,14,14,
82 6, 4, 0, 0, 6, 5, 4, 0, 6, 5, 5, 4, 7, 5, 5, 4,
83 7, 5, 5, 4, 7, 6, 6, 4, 7, 6, 6, 4, 8, 7, 7, 5,
84 8, 8, 7, 6, 9, 8, 8, 7, 9, 9, 8, 8, 9, 9, 9, 8,
85 10, 9, 9, 9, 10,10,10,10, 10,10,10,10, 10,10,10,10,
89 6, 6, 0, 0, 6, 6, 6, 0, 6, 6, 6, 6, 6, 6, 6, 6,
90 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
91 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
92 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
96 static const uint8_t coeff_token_bits[4][4*17]={
99 5, 1, 0, 0, 7, 4, 1, 0, 7, 6, 5, 3, 7, 6, 5, 3,
100 7, 6, 5, 4, 15, 6, 5, 4, 11,14, 5, 4, 8,10,13, 4,
101 15,14, 9, 4, 11,10,13,12, 15,14, 9,12, 11,10,13, 8,
102 15, 1, 9,12, 11,14,13, 8, 7,10, 9,12, 4, 6, 5, 8,
106 11, 2, 0, 0, 7, 7, 3, 0, 7,10, 9, 5, 7, 6, 5, 4,
107 4, 6, 5, 6, 7, 6, 5, 8, 15, 6, 5, 4, 11,14,13, 4,
108 15,10, 9, 4, 11,14,13,12, 8,10, 9, 8, 15,14,13,12,
109 11,10, 9,12, 7,11, 6, 8, 9, 8,10, 1, 7, 6, 5, 4,
113 15,14, 0, 0, 11,15,13, 0, 8,12,14,12, 15,10,11,11,
114 11, 8, 9,10, 9,14,13, 9, 8,10, 9, 8, 15,14,13,13,
115 11,14,10,12, 15,10,13,12, 11,14, 9,12, 8,10,13, 8,
116 13, 7, 9,12, 9,12,11,10, 5, 8, 7, 6, 1, 4, 3, 2,
120 0, 1, 0, 0, 4, 5, 6, 0, 8, 9,10,11, 12,13,14,15,
121 16,17,18,19, 20,21,22,23, 24,25,26,27, 28,29,30,31,
122 32,33,34,35, 36,37,38,39, 40,41,42,43, 44,45,46,47,
123 48,49,50,51, 52,53,54,55, 56,57,58,59, 60,61,62,63,
127 static const uint8_t total_zeros_len[16][16]= {
128 {1,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9},
129 {3,3,3,3,3,4,4,4,4,5,5,6,6,6,6},
130 {4,3,3,3,4,4,3,3,4,5,5,6,5,6},
131 {5,3,4,4,3,3,3,4,3,4,5,5,5},
132 {4,4,4,3,3,3,3,3,4,5,4,5},
133 {6,5,3,3,3,3,3,3,4,3,6},
134 {6,5,3,3,3,2,3,4,3,6},
145 static const uint8_t total_zeros_bits[16][16]= {
146 {1,3,2,3,2,3,2,3,2,3,2,3,2,3,2,1},
147 {7,6,5,4,3,5,4,3,2,3,2,3,2,1,0},
148 {5,7,6,5,4,3,4,3,2,3,2,1,1,0},
149 {3,7,5,4,6,5,4,3,3,2,2,1,0},
150 {5,4,3,7,6,5,4,3,2,1,1,0},
151 {1,1,7,6,5,4,3,2,1,1,0},
152 {1,1,5,4,3,3,2,1,1,0},
163 static const uint8_t chroma_dc_total_zeros_len[3][4]= {
169 static const uint8_t chroma_dc_total_zeros_bits[3][4]= {
175 static const uint8_t run_len[7][16]={
182 {3,3,3,3,3,3,3,4,5,6,7,8,9,10,11},
185 static const uint8_t run_bits[7][16]={
192 {7,6,5,4,3,2,1,1,1,1,1,1,1,1,1},
195 static VLC coeff_token_vlc[4];
196 static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
197 static const int coeff_token_vlc_tables_size[4]={520,332,280,256};
199 static VLC chroma_dc_coeff_token_vlc;
200 static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
201 static const int chroma_dc_coeff_token_vlc_table_size = 256;
203 static VLC total_zeros_vlc[15];
204 static VLC_TYPE total_zeros_vlc_tables[15][512][2];
205 static const int total_zeros_vlc_tables_size = 512;
207 static VLC chroma_dc_total_zeros_vlc[3];
208 static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
209 static const int chroma_dc_total_zeros_vlc_tables_size = 8;
211 static VLC run_vlc[6];
212 static VLC_TYPE run_vlc_tables[6][8][2];
213 static const int run_vlc_tables_size = 8;
216 static VLC_TYPE run7_vlc_table[96][2];
217 static const int run7_vlc_table_size = 96;
219 #define LEVEL_TAB_BITS 8
220 static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];
224 * gets the predicted number of non-zero coefficients.
225 * @param n block index
227 static inline int pred_non_zero_count(H264Context *h, int n){
228 const int index8= scan8[n];
229 const int left= h->non_zero_count_cache[index8 - 1];
230 const int top = h->non_zero_count_cache[index8 - 8];
233 if(i<64) i= (i+1)>>1;
235 tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
240 static av_cold void init_cavlc_level_tab(void){
241 int suffix_length, mask;
244 for(suffix_length=0; suffix_length<7; suffix_length++){
245 for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
246 int prefix= LEVEL_TAB_BITS - av_log2(2*i);
247 int level_code= (prefix<<suffix_length) + (i>>(LEVEL_TAB_BITS-prefix-1-suffix_length)) - (1<<suffix_length);
249 mask= -(level_code&1);
250 level_code= (((2+level_code)>>1) ^ mask) - mask;
251 if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
252 cavlc_level_tab[suffix_length][i][0]= level_code;
253 cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
254 }else if(prefix + 1 <= LEVEL_TAB_BITS){
255 cavlc_level_tab[suffix_length][i][0]= prefix+100;
256 cavlc_level_tab[suffix_length][i][1]= prefix + 1;
258 cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
259 cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
265 av_cold void ff_h264_decode_init_vlc(void){
273 chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
274 chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
275 init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
276 &chroma_dc_coeff_token_len [0], 1, 1,
277 &chroma_dc_coeff_token_bits[0], 1, 1,
278 INIT_VLC_USE_NEW_STATIC);
282 coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
283 coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
284 init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
285 &coeff_token_len [i][0], 1, 1,
286 &coeff_token_bits[i][0], 1, 1,
287 INIT_VLC_USE_NEW_STATIC);
288 offset += coeff_token_vlc_tables_size[i];
291 * This is a one time safety check to make sure that
292 * the packed static coeff_token_vlc table sizes
293 * were initialized correctly.
295 assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
298 chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
299 chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
300 init_vlc(&chroma_dc_total_zeros_vlc[i],
301 CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
302 &chroma_dc_total_zeros_len [i][0], 1, 1,
303 &chroma_dc_total_zeros_bits[i][0], 1, 1,
304 INIT_VLC_USE_NEW_STATIC);
307 total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
308 total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
309 init_vlc(&total_zeros_vlc[i],
310 TOTAL_ZEROS_VLC_BITS, 16,
311 &total_zeros_len [i][0], 1, 1,
312 &total_zeros_bits[i][0], 1, 1,
313 INIT_VLC_USE_NEW_STATIC);
317 run_vlc[i].table = run_vlc_tables[i];
318 run_vlc[i].table_allocated = run_vlc_tables_size;
319 init_vlc(&run_vlc[i],
321 &run_len [i][0], 1, 1,
322 &run_bits[i][0], 1, 1,
323 INIT_VLC_USE_NEW_STATIC);
325 run7_vlc.table = run7_vlc_table,
326 run7_vlc.table_allocated = run7_vlc_table_size;
327 init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
328 &run_len [6][0], 1, 1,
329 &run_bits[6][0], 1, 1,
330 INIT_VLC_USE_NEW_STATIC);
332 init_cavlc_level_tab();
339 static inline int get_level_prefix(GetBitContext *gb){
344 UPDATE_CACHE(re, gb);
345 buf=GET_CACHE(re, gb);
347 log= 32 - av_log2(buf);
349 print_bin(buf>>(32-log), log);
350 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__);
353 LAST_SKIP_BITS(re, gb, log);
354 CLOSE_READER(re, gb);
360 * decodes a residual block.
361 * @param n block index
362 * @param scantable scantable
363 * @param max_coeff number of coefficients in the block
364 * @return <0 if an error occurred
366 static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
367 MpegEncContext * const s = &h->s;
368 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};
370 int zeros_left, coeff_token, total_coeff, i, trailing_ones, run_before;
372 //FIXME put trailing_onex into the context
374 if(n >= CHROMA_DC_BLOCK_INDEX){
375 coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
376 total_coeff= coeff_token>>2;
378 if(n == LUMA_DC_BLOCK_INDEX){
379 total_coeff= pred_non_zero_count(h, 0);
380 coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
381 total_coeff= coeff_token>>2;
383 total_coeff= pred_non_zero_count(h, n);
384 coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
385 total_coeff= coeff_token>>2;
388 h->non_zero_count_cache[ scan8[n] ]= total_coeff;
390 //FIXME set last_non_zero?
394 if(total_coeff > (unsigned)max_coeff) {
395 av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
399 trailing_ones= coeff_token&3;
400 tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
401 assert(total_coeff<=16);
403 i = show_bits(gb, 3);
404 skip_bits(gb, trailing_ones);
405 level[0] = 1-((i&4)>>1);
406 level[1] = 1-((i&2) );
407 level[2] = 1-((i&1)<<1);
409 if(trailing_ones<total_coeff) {
411 int suffix_length = total_coeff > 10 & trailing_ones < 3;
412 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
413 int level_code= cavlc_level_tab[suffix_length][bitsi][0];
415 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
416 if(level_code >= 100){
417 prefix= level_code - 100;
418 if(prefix == LEVEL_TAB_BITS)
419 prefix += get_level_prefix(gb);
421 //first coefficient has suffix_length equal to 0 or 1
422 if(prefix<14){ //FIXME try to build a large unified VLC table for all this
424 level_code= (prefix<<1) + get_bits1(gb); //part
426 level_code= prefix; //part
427 }else if(prefix==14){
429 level_code= (prefix<<1) + get_bits1(gb); //part
431 level_code= prefix + get_bits(gb, 4); //part
433 level_code= 30 + get_bits(gb, prefix-3); //part
436 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid level prefix\n");
439 level_code += (1<<(prefix-3))-4096;
443 if(trailing_ones < 3) level_code += 2;
446 mask= -(level_code&1);
447 level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
449 level_code += ((level_code>>31)|1) & -(trailing_ones < 3);
451 suffix_length = 1 + (level_code + 3U > 6U);
452 level[trailing_ones]= level_code;
455 //remaining coefficients have suffix_length > 0
456 for(i=trailing_ones+1;i<total_coeff;i++) {
457 static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
458 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
459 level_code= cavlc_level_tab[suffix_length][bitsi][0];
461 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
462 if(level_code >= 100){
463 prefix= level_code - 100;
464 if(prefix == LEVEL_TAB_BITS){
465 prefix += get_level_prefix(gb);
468 level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
470 level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
472 level_code += (1<<(prefix-3))-4096;
474 mask= -(level_code&1);
475 level_code= (((2+level_code)>>1) ^ mask) - mask;
477 level[i]= level_code;
478 suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length];
482 if(total_coeff == max_coeff)
485 if(n >= CHROMA_DC_BLOCK_INDEX)
486 zeros_left= get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[ total_coeff ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
488 zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1);
491 scantable += zeros_left + total_coeff - 1;
492 if(n >= LUMA_DC_BLOCK_INDEX){
493 block[*scantable] = level[0];
494 for(i=1;i<total_coeff && zeros_left > 0;i++) {
496 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1);
498 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
499 zeros_left -= run_before;
500 scantable -= 1 + run_before;
501 block[*scantable]= level[i];
503 for(;i<total_coeff;i++) {
505 block[*scantable]= level[i];
508 block[*scantable] = (level[0] * qmul[*scantable] + 32)>>6;
509 for(i=1;i<total_coeff && zeros_left > 0;i++) {
511 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1);
513 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
514 zeros_left -= run_before;
515 scantable -= 1 + run_before;
516 block[*scantable]= (level[i] * qmul[*scantable] + 32)>>6;
518 for(;i<total_coeff;i++) {
520 block[*scantable]= (level[i] * qmul[*scantable] + 32)>>6;
525 av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
532 int ff_h264_decode_mb_cavlc(H264Context *h){
533 MpegEncContext * const s = &h->s;
536 unsigned int mb_type, cbp;
537 int dct8x8_allowed= h->pps.transform_8x8_mode;
539 mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
541 tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
542 cbp = 0; /* avoid warning. FIXME: find a solution without slowing
544 if(h->slice_type_nos != FF_I_TYPE){
545 if(s->mb_skip_run==-1)
546 s->mb_skip_run= get_ue_golomb(&s->gb);
548 if (s->mb_skip_run--) {
549 if(FRAME_MBAFF && (s->mb_y&1) == 0){
550 if(s->mb_skip_run==0)
551 h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
558 if( (s->mb_y&1) == 0 )
559 h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
562 h->prev_mb_skipped= 0;
564 mb_type= get_ue_golomb(&s->gb);
565 if(h->slice_type_nos == FF_B_TYPE){
567 partition_count= b_mb_type_info[mb_type].partition_count;
568 mb_type= b_mb_type_info[mb_type].type;
571 goto decode_intra_mb;
573 }else if(h->slice_type_nos == FF_P_TYPE){
575 partition_count= p_mb_type_info[mb_type].partition_count;
576 mb_type= p_mb_type_info[mb_type].type;
579 goto decode_intra_mb;
582 assert(h->slice_type_nos == FF_I_TYPE);
583 if(h->slice_type == FF_SI_TYPE && mb_type)
587 av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_pict_type_char(h->slice_type), s->mb_x, s->mb_y);
591 cbp= i_mb_type_info[mb_type].cbp;
592 h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
593 mb_type= i_mb_type_info[mb_type].type;
597 mb_type |= MB_TYPE_INTERLACED;
599 h->slice_table[ mb_xy ]= h->slice_num;
601 if(IS_INTRA_PCM(mb_type)){
604 // We assume these blocks are very rare so we do not optimize it.
605 align_get_bits(&s->gb);
607 // The pixels are stored in the same order as levels in h->mb array.
608 for(x=0; x < (CHROMA ? 384 : 256); x++){
609 ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
612 // In deblocking, the quantizer is 0
613 s->current_picture.qscale_table[mb_xy]= 0;
614 // All coeffs are present
615 memset(h->non_zero_count[mb_xy], 16, 32);
617 s->current_picture.mb_type[mb_xy]= mb_type;
622 h->ref_count[0] <<= 1;
623 h->ref_count[1] <<= 1;
626 fill_decode_neighbors(h, mb_type);
627 fill_decode_caches(h, mb_type);
630 if(IS_INTRA(mb_type)){
632 // init_top_left_availability(h);
633 if(IS_INTRA4x4(mb_type)){
636 if(dct8x8_allowed && get_bits1(&s->gb)){
637 mb_type |= MB_TYPE_8x8DCT;
641 // fill_intra4x4_pred_table(h);
642 for(i=0; i<16; i+=di){
643 int mode= pred_intra_mode(h, i);
645 if(!get_bits1(&s->gb)){
646 const int rem_mode= get_bits(&s->gb, 3);
647 mode = rem_mode + (rem_mode >= mode);
651 fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
653 h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
655 ff_h264_write_back_intra_pred_mode(h);
656 if( ff_h264_check_intra4x4_pred_mode(h) < 0)
659 h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode);
660 if(h->intra16x16_pred_mode < 0)
664 pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&s->gb));
667 h->chroma_pred_mode= pred_mode;
669 h->chroma_pred_mode = DC_128_PRED8x8;
671 }else if(partition_count==4){
672 int i, j, sub_partition_count[4], list, ref[2][4];
674 if(h->slice_type_nos == FF_B_TYPE){
676 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
677 if(h->sub_mb_type[i] >=13){
678 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);
681 sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
682 h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
684 if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) {
685 ff_h264_pred_direct_motion(h, &mb_type);
686 h->ref_cache[0][scan8[4]] =
687 h->ref_cache[1][scan8[4]] =
688 h->ref_cache[0][scan8[12]] =
689 h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
692 assert(h->slice_type_nos == FF_P_TYPE); //FIXME SP correct ?
694 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
695 if(h->sub_mb_type[i] >=4){
696 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);
699 sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
700 h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
704 for(list=0; list<h->list_count; list++){
705 int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list];
707 if(IS_DIRECT(h->sub_mb_type[i])) continue;
708 if(IS_DIR(h->sub_mb_type[i], 0, list)){
712 }else if(ref_count == 2){
713 tmp= get_bits1(&s->gb)^1;
715 tmp= get_ue_golomb_31(&s->gb);
717 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
730 dct8x8_allowed = get_dct8x8_allowed(h);
732 for(list=0; list<h->list_count; list++){
734 if(IS_DIRECT(h->sub_mb_type[i])) {
735 h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
738 h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ]=
739 h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
741 if(IS_DIR(h->sub_mb_type[i], 0, list)){
742 const int sub_mb_type= h->sub_mb_type[i];
743 const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
744 for(j=0; j<sub_partition_count[i]; j++){
746 const int index= 4*i + block_width*j;
747 int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
748 pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
749 mx += get_se_golomb(&s->gb);
750 my += get_se_golomb(&s->gb);
751 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
753 if(IS_SUB_8X8(sub_mb_type)){
755 mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
757 mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
758 }else if(IS_SUB_8X4(sub_mb_type)){
759 mv_cache[ 1 ][0]= mx;
760 mv_cache[ 1 ][1]= my;
761 }else if(IS_SUB_4X8(sub_mb_type)){
762 mv_cache[ 8 ][0]= mx;
763 mv_cache[ 8 ][1]= my;
765 mv_cache[ 0 ][0]= mx;
766 mv_cache[ 0 ][1]= my;
769 uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
775 }else if(IS_DIRECT(mb_type)){
776 ff_h264_pred_direct_motion(h, &mb_type);
777 dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
780 //FIXME we should set ref_idx_l? to 0 if we use that later ...
781 if(IS_16X16(mb_type)){
782 for(list=0; list<h->list_count; list++){
784 if(IS_DIR(mb_type, 0, list)){
785 if(h->ref_count[list]==1){
787 }else if(h->ref_count[list]==2){
788 val= get_bits1(&s->gb)^1;
790 val= get_ue_golomb_31(&s->gb);
791 if(val >= h->ref_count[list]){
792 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
796 fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
799 for(list=0; list<h->list_count; list++){
800 if(IS_DIR(mb_type, 0, list)){
801 pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
802 mx += get_se_golomb(&s->gb);
803 my += get_se_golomb(&s->gb);
804 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
806 fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
810 else if(IS_16X8(mb_type)){
811 for(list=0; list<h->list_count; list++){
814 if(IS_DIR(mb_type, i, list)){
815 if(h->ref_count[list] == 1){
817 }else if(h->ref_count[list] == 2){
818 val= get_bits1(&s->gb)^1;
820 val= get_ue_golomb_31(&s->gb);
821 if(val >= h->ref_count[list]){
822 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
827 val= LIST_NOT_USED&0xFF;
828 fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
831 for(list=0; list<h->list_count; list++){
834 if(IS_DIR(mb_type, i, list)){
835 pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
836 mx += get_se_golomb(&s->gb);
837 my += get_se_golomb(&s->gb);
838 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
840 val= pack16to32(mx,my);
843 fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
847 assert(IS_8X16(mb_type));
848 for(list=0; list<h->list_count; list++){
851 if(IS_DIR(mb_type, i, list)){ //FIXME optimize
852 if(h->ref_count[list]==1){
854 }else if(h->ref_count[list]==2){
855 val= get_bits1(&s->gb)^1;
857 val= get_ue_golomb_31(&s->gb);
858 if(val >= h->ref_count[list]){
859 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
864 val= LIST_NOT_USED&0xFF;
865 fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
868 for(list=0; list<h->list_count; list++){
871 if(IS_DIR(mb_type, i, list)){
872 pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
873 mx += get_se_golomb(&s->gb);
874 my += get_se_golomb(&s->gb);
875 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
877 val= pack16to32(mx,my);
880 fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
886 if(IS_INTER(mb_type))
887 write_back_motion(h, mb_type);
889 if(!IS_INTRA16x16(mb_type)){
890 cbp= get_ue_golomb(&s->gb);
892 av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
897 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
898 else cbp= golomb_to_inter_cbp [cbp];
900 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
901 else cbp= golomb_to_inter_cbp_gray[cbp];
905 if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
906 mb_type |= MB_TYPE_8x8DCT*get_bits1(&s->gb);
909 h->cbp_table[mb_xy]= cbp;
910 s->current_picture.mb_type[mb_xy]= mb_type;
912 if(cbp || IS_INTRA16x16(mb_type)){
913 int i8x8, i4x4, chroma_idx;
915 GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
916 const uint8_t *scan, *scan8x8;
918 if(IS_INTERLACED(mb_type)){
919 scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
920 scan= s->qscale ? h->field_scan : h->field_scan_q0;
922 scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
923 scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
926 dquant= get_se_golomb(&s->gb);
930 if(((unsigned)s->qscale) > 51){
931 if(s->qscale<0) s->qscale+= 52;
933 if(((unsigned)s->qscale) > 51){
934 av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y);
939 h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale);
940 h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale);
941 if(IS_INTRA16x16(mb_type)){
942 AV_ZERO128(h->mb_luma_dc+0);
943 AV_ZERO128(h->mb_luma_dc+8);
944 if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc, LUMA_DC_BLOCK_INDEX, scan, h->dequant4_coeff[0][s->qscale], 16) < 0){
945 return -1; //FIXME continue if partitioned and other return -1 too
948 assert((cbp&15) == 0 || (cbp&15) == 15);
951 for(i8x8=0; i8x8<4; i8x8++){
952 for(i4x4=0; i4x4<4; i4x4++){
953 const int index= i4x4 + 4*i8x8;
954 if( decode_residual(h, h->intra_gb_ptr, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){
960 fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
963 for(i8x8=0; i8x8<4; i8x8++){
965 if(IS_8x8DCT(mb_type)){
966 DCTELEM *buf = &h->mb[64*i8x8];
968 for(i4x4=0; i4x4<4; i4x4++){
969 if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4,
970 h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 )
973 nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
974 nnz[0] += nnz[1] + nnz[8] + nnz[9];
976 for(i4x4=0; i4x4<4; i4x4++){
977 const int index= i4x4 + 4*i8x8;
979 if( decode_residual(h, gb, h->mb + 16*index, index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){
985 uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
986 nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
992 for(chroma_idx=0; chroma_idx<2; chroma_idx++)
993 if( decode_residual(h, gb, h->mb + 256 + 16*4*chroma_idx, CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){
999 for(chroma_idx=0; chroma_idx<2; chroma_idx++){
1000 const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
1001 for(i4x4=0; i4x4<4; i4x4++){
1002 const int index= 16 + 4*chroma_idx + i4x4;
1003 if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){
1009 uint8_t * const nnz= &h->non_zero_count_cache[0];
1010 nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1011 nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1014 uint8_t * const nnz= &h->non_zero_count_cache[0];
1015 fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
1016 nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1017 nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1019 s->current_picture.qscale_table[mb_xy]= s->qscale;
1020 write_back_non_zero_count(h);
1023 h->ref_count[0] >>= 1;
1024 h->ref_count[1] >>= 1;