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
23 * @file libavcodec/h264_cavlc.c
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_num, coeff_token, total_coeff, i, j, 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;
386 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
435 level_code += (1<<(prefix-3))-4096;
438 if(trailing_ones < 3) level_code += 2;
441 mask= -(level_code&1);
442 level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
444 level_code += ((level_code>>31)|1) & -(trailing_ones < 3);
446 suffix_length = 1 + (level_code + 3U > 6U);
447 level[trailing_ones]= level_code;
450 //remaining coefficients have suffix_length > 0
451 for(i=trailing_ones+1;i<total_coeff;i++) {
452 static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
453 int bitsi= show_bits(gb, LEVEL_TAB_BITS);
454 level_code= cavlc_level_tab[suffix_length][bitsi][0];
456 skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
457 if(level_code >= 100){
458 prefix= level_code - 100;
459 if(prefix == LEVEL_TAB_BITS){
460 prefix += get_level_prefix(gb);
463 level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
465 level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
467 level_code += (1<<(prefix-3))-4096;
469 mask= -(level_code&1);
470 level_code= (((2+level_code)>>1) ^ mask) - mask;
472 level[i]= level_code;
473 suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length];
477 if(total_coeff == max_coeff)
480 if(n == CHROMA_DC_BLOCK_INDEX)
481 zeros_left= get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[ total_coeff ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
483 zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1);
486 coeff_num = zeros_left + total_coeff - 1;
487 j = scantable[coeff_num];
490 for(i=1;i<total_coeff;i++) {
493 else if(zeros_left < 7){
494 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1);
496 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
498 zeros_left -= run_before;
499 coeff_num -= 1 + run_before;
500 j= scantable[ coeff_num ];
505 block[j] = (level[0] * qmul[j] + 32)>>6;
506 for(i=1;i<total_coeff;i++) {
509 else if(zeros_left < 7){
510 run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1);
512 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
514 zeros_left -= run_before;
515 coeff_num -= 1 + run_before;
516 j= scantable[ coeff_num ];
518 block[j]= (level[i] * qmul[j] + 32)>>6;
523 av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
530 int ff_h264_decode_mb_cavlc(H264Context *h){
531 MpegEncContext * const s = &h->s;
534 unsigned int mb_type, cbp;
535 int dct8x8_allowed= h->pps.transform_8x8_mode;
537 mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
539 tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
540 cbp = 0; /* avoid warning. FIXME: find a solution without slowing
542 if(h->slice_type_nos != FF_I_TYPE){
543 if(s->mb_skip_run==-1)
544 s->mb_skip_run= get_ue_golomb(&s->gb);
546 if (s->mb_skip_run--) {
547 if(FRAME_MBAFF && (s->mb_y&1) == 0){
548 if(s->mb_skip_run==0)
549 h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
551 predict_field_decoding_flag(h);
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_caches(h, mb_type);
629 if(IS_INTRA(mb_type)){
631 // init_top_left_availability(h);
632 if(IS_INTRA4x4(mb_type)){
635 if(dct8x8_allowed && get_bits1(&s->gb)){
636 mb_type |= MB_TYPE_8x8DCT;
640 // fill_intra4x4_pred_table(h);
641 for(i=0; i<16; i+=di){
642 int mode= pred_intra_mode(h, i);
644 if(!get_bits1(&s->gb)){
645 const int rem_mode= get_bits(&s->gb, 3);
646 mode = rem_mode + (rem_mode >= mode);
650 fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
652 h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
654 ff_h264_write_back_intra_pred_mode(h);
655 if( ff_h264_check_intra4x4_pred_mode(h) < 0)
658 h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode);
659 if(h->intra16x16_pred_mode < 0)
663 pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&s->gb));
666 h->chroma_pred_mode= pred_mode;
668 }else if(partition_count==4){
669 int i, j, sub_partition_count[4], list, ref[2][4];
671 if(h->slice_type_nos == FF_B_TYPE){
673 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
674 if(h->sub_mb_type[i] >=13){
675 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);
678 sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
679 h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
681 if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) {
682 ff_h264_pred_direct_motion(h, &mb_type);
683 h->ref_cache[0][scan8[4]] =
684 h->ref_cache[1][scan8[4]] =
685 h->ref_cache[0][scan8[12]] =
686 h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
689 assert(h->slice_type_nos == FF_P_TYPE); //FIXME SP correct ?
691 h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
692 if(h->sub_mb_type[i] >=4){
693 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);
696 sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
697 h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
701 for(list=0; list<h->list_count; list++){
702 int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list];
704 if(IS_DIRECT(h->sub_mb_type[i])) continue;
705 if(IS_DIR(h->sub_mb_type[i], 0, list)){
709 }else if(ref_count == 2){
710 tmp= get_bits1(&s->gb)^1;
712 tmp= get_ue_golomb_31(&s->gb);
714 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
727 dct8x8_allowed = get_dct8x8_allowed(h);
729 for(list=0; list<h->list_count; list++){
731 if(IS_DIRECT(h->sub_mb_type[i])) {
732 h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
735 h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ]=
736 h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
738 if(IS_DIR(h->sub_mb_type[i], 0, list)){
739 const int sub_mb_type= h->sub_mb_type[i];
740 const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
741 for(j=0; j<sub_partition_count[i]; j++){
743 const int index= 4*i + block_width*j;
744 int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
745 pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
746 mx += get_se_golomb(&s->gb);
747 my += get_se_golomb(&s->gb);
748 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
750 if(IS_SUB_8X8(sub_mb_type)){
752 mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
754 mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
755 }else if(IS_SUB_8X4(sub_mb_type)){
756 mv_cache[ 1 ][0]= mx;
757 mv_cache[ 1 ][1]= my;
758 }else if(IS_SUB_4X8(sub_mb_type)){
759 mv_cache[ 8 ][0]= mx;
760 mv_cache[ 8 ][1]= my;
762 mv_cache[ 0 ][0]= mx;
763 mv_cache[ 0 ][1]= my;
766 uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
772 }else if(IS_DIRECT(mb_type)){
773 ff_h264_pred_direct_motion(h, &mb_type);
774 dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
777 //FIXME we should set ref_idx_l? to 0 if we use that later ...
778 if(IS_16X16(mb_type)){
779 for(list=0; list<h->list_count; list++){
781 if(IS_DIR(mb_type, 0, list)){
782 if(h->ref_count[list]==1){
784 }else if(h->ref_count[list]==2){
785 val= get_bits1(&s->gb)^1;
787 val= get_ue_golomb_31(&s->gb);
788 if(val >= h->ref_count[list]){
789 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
794 val= LIST_NOT_USED&0xFF;
795 fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
797 for(list=0; list<h->list_count; list++){
799 if(IS_DIR(mb_type, 0, list)){
800 pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
801 mx += get_se_golomb(&s->gb);
802 my += get_se_golomb(&s->gb);
803 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
805 val= pack16to32(mx,my);
808 fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, val, 4);
811 else if(IS_16X8(mb_type)){
812 for(list=0; list<h->list_count; list++){
815 if(IS_DIR(mb_type, i, list)){
816 if(h->ref_count[list] == 1){
818 }else if(h->ref_count[list] == 2){
819 val= get_bits1(&s->gb)^1;
821 val= get_ue_golomb_31(&s->gb);
822 if(val >= h->ref_count[list]){
823 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
828 val= LIST_NOT_USED&0xFF;
829 fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
832 for(list=0; list<h->list_count; list++){
835 if(IS_DIR(mb_type, i, list)){
836 pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
837 mx += get_se_golomb(&s->gb);
838 my += get_se_golomb(&s->gb);
839 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
841 val= pack16to32(mx,my);
844 fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
848 assert(IS_8X16(mb_type));
849 for(list=0; list<h->list_count; list++){
852 if(IS_DIR(mb_type, i, list)){ //FIXME optimize
853 if(h->ref_count[list]==1){
855 }else if(h->ref_count[list]==2){
856 val= get_bits1(&s->gb)^1;
858 val= get_ue_golomb_31(&s->gb);
859 if(val >= h->ref_count[list]){
860 av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
865 val= LIST_NOT_USED&0xFF;
866 fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
869 for(list=0; list<h->list_count; list++){
872 if(IS_DIR(mb_type, i, list)){
873 pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
874 mx += get_se_golomb(&s->gb);
875 my += get_se_golomb(&s->gb);
876 tprintf(s->avctx, "final mv:%d %d\n", mx, my);
878 val= pack16to32(mx,my);
881 fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
887 if(IS_INTER(mb_type))
888 write_back_motion(h, mb_type);
890 if(!IS_INTRA16x16(mb_type)){
891 cbp= get_ue_golomb(&s->gb);
893 av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
898 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
899 else cbp= golomb_to_inter_cbp [cbp];
901 if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
902 else cbp= golomb_to_inter_cbp_gray[cbp];
906 if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
907 mb_type |= MB_TYPE_8x8DCT*get_bits1(&s->gb);
910 h->cbp_table[mb_xy]= cbp;
911 s->current_picture.mb_type[mb_xy]= mb_type;
913 if(cbp || IS_INTRA16x16(mb_type)){
914 int i8x8, i4x4, chroma_idx;
916 GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
917 const uint8_t *scan, *scan8x8, *dc_scan;
919 if(IS_INTERLACED(mb_type)){
920 scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
921 scan= s->qscale ? h->field_scan : h->field_scan_q0;
922 dc_scan= luma_dc_field_scan;
924 scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
925 scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
926 dc_scan= luma_dc_zigzag_scan;
929 dquant= get_se_golomb(&s->gb);
933 if(((unsigned)s->qscale) > 51){
934 if(s->qscale<0) s->qscale+= 52;
936 if(((unsigned)s->qscale) > 51){
937 av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y);
942 h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale);
943 h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale);
944 if(IS_INTRA16x16(mb_type)){
945 if( decode_residual(h, h->intra_gb_ptr, h->mb, LUMA_DC_BLOCK_INDEX, dc_scan, h->dequant4_coeff[0][s->qscale], 16) < 0){
946 return -1; //FIXME continue if partitioned and other return -1 too
949 assert((cbp&15) == 0 || (cbp&15) == 15);
952 for(i8x8=0; i8x8<4; i8x8++){
953 for(i4x4=0; i4x4<4; i4x4++){
954 const int index= i4x4 + 4*i8x8;
955 if( decode_residual(h, h->intra_gb_ptr, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){
961 fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
964 for(i8x8=0; i8x8<4; i8x8++){
966 if(IS_8x8DCT(mb_type)){
967 DCTELEM *buf = &h->mb[64*i8x8];
969 for(i4x4=0; i4x4<4; i4x4++){
970 if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4,
971 h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 )
974 nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
975 nnz[0] += nnz[1] + nnz[8] + nnz[9];
977 for(i4x4=0; i4x4<4; i4x4++){
978 const int index= i4x4 + 4*i8x8;
980 if( decode_residual(h, gb, h->mb + 16*index, index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){
986 uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
987 nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
993 for(chroma_idx=0; chroma_idx<2; chroma_idx++)
994 if( decode_residual(h, gb, h->mb + 256 + 16*4*chroma_idx, CHROMA_DC_BLOCK_INDEX, chroma_dc_scan, NULL, 4) < 0){
1000 for(chroma_idx=0; chroma_idx<2; chroma_idx++){
1001 const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
1002 for(i4x4=0; i4x4<4; i4x4++){
1003 const int index= 16 + 4*chroma_idx + i4x4;
1004 if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){
1010 uint8_t * const nnz= &h->non_zero_count_cache[0];
1011 nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1012 nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1015 uint8_t * const nnz= &h->non_zero_count_cache[0];
1016 fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
1017 nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
1018 nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
1020 s->current_picture.qscale_table[mb_xy]= s->qscale;
1021 write_back_non_zero_count(h);
1024 h->ref_count[0] >>= 1;
1025 h->ref_count[1] >>= 1;