static int decode_mb_cavlc(H264Context *h){ MpegEncContext * const s = &h->s; const int mb_xy= s->mb_x + s->mb_y*s->mb_stride; int partition_count; unsigned int mb_type, cbp; int dct8x8_allowed= h->pps.transform_8x8_mode; s->dsp.clear_blocks(h->mb); //FIXME avoid if already clear (move after skip handlong? tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y); cbp = 0; /* avoid warning. FIXME: find a solution without slowing down the code */ if(h->slice_type != I_TYPE && h->slice_type != SI_TYPE){ if(s->mb_skip_run==-1) s->mb_skip_run= get_ue_golomb(&s->gb); if (s->mb_skip_run--) { if(FRAME_MBAFF && (s->mb_y&1) == 0){ if(s->mb_skip_run==0) h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb); else predict_field_decoding_flag(h); } decode_mb_skip(h); return 0; } } if(FRAME_MBAFF){ if( (s->mb_y&1) == 0 ) h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb); }else h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME); h->prev_mb_skipped= 0; mb_type= get_ue_golomb(&s->gb); if(h->slice_type == B_TYPE){ if(mb_type < 23){ partition_count= b_mb_type_info[mb_type].partition_count; mb_type= b_mb_type_info[mb_type].type; }else{ mb_type -= 23; goto decode_intra_mb; } }else if(h->slice_type == P_TYPE /*|| h->slice_type == SP_TYPE */){ if(mb_type < 5){ partition_count= p_mb_type_info[mb_type].partition_count; mb_type= p_mb_type_info[mb_type].type; }else{ mb_type -= 5; goto decode_intra_mb; } }else{ assert(h->slice_type == I_TYPE); decode_intra_mb: if(mb_type > 25){ 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); return -1; } partition_count=0; cbp= i_mb_type_info[mb_type].cbp; h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode; mb_type= i_mb_type_info[mb_type].type; } if(MB_FIELD) mb_type |= MB_TYPE_INTERLACED; h->slice_table[ mb_xy ]= h->slice_num; if(IS_INTRA_PCM(mb_type)){ unsigned int x, y; // We assume these blocks are very rare so we do not optimize it. align_get_bits(&s->gb); // The pixels are stored in the same order as levels in h->mb array. for(y=0; y<16; y++){ const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3); for(x=0; x<16; x++){ tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8)); h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= get_bits(&s->gb, 8); } } for(y=0; y<8; y++){ const int index= 256 + 4*(y&3) + 32*(y>>2); for(x=0; x<8; x++){ tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8)); h->mb[index + (x&3) + 16*(x>>2)]= get_bits(&s->gb, 8); } } for(y=0; y<8; y++){ const int index= 256 + 64 + 4*(y&3) + 32*(y>>2); for(x=0; x<8; x++){ tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8)); h->mb[index + (x&3) + 16*(x>>2)]= get_bits(&s->gb, 8); } } // In deblocking, the quantizer is 0 s->current_picture.qscale_table[mb_xy]= 0; h->chroma_qp = get_chroma_qp(h->pps.chroma_qp_index_offset, 0); // All coeffs are present memset(h->non_zero_count[mb_xy], 16, 16); s->current_picture.mb_type[mb_xy]= mb_type; return 0; } if(MB_MBAFF){ h->ref_count[0] <<= 1; h->ref_count[1] <<= 1; } fill_caches(h, mb_type, 0); //mb_pred if(IS_INTRA(mb_type)){ int pred_mode; // init_top_left_availability(h); if(IS_INTRA4x4(mb_type)){ int i; int di = 1; if(dct8x8_allowed && get_bits1(&s->gb)){ mb_type |= MB_TYPE_8x8DCT; di = 4; } // fill_intra4x4_pred_table(h); for(i=0; i<16; i+=di){ int mode= pred_intra_mode(h, i); if(!get_bits1(&s->gb)){ const int rem_mode= get_bits(&s->gb, 3); mode = rem_mode + (rem_mode >= mode); } if(di==4) fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 ); else h->intra4x4_pred_mode_cache[ scan8[i] ] = mode; } write_back_intra_pred_mode(h); if( check_intra4x4_pred_mode(h) < 0) return -1; }else{ h->intra16x16_pred_mode= check_intra_pred_mode(h, h->intra16x16_pred_mode); if(h->intra16x16_pred_mode < 0) return -1; } pred_mode= check_intra_pred_mode(h, get_ue_golomb(&s->gb)); if(pred_mode < 0) return -1; h->chroma_pred_mode= pred_mode; }else if(partition_count==4){ int i, j, sub_partition_count[4], list, ref[2][4]; if(h->slice_type == B_TYPE){ for(i=0; i<4; i++){ h->sub_mb_type[i]= get_ue_golomb(&s->gb); if(h->sub_mb_type[i] >=13){ 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); return -1; } sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count; h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type; } if( IS_DIRECT(h->sub_mb_type[0]) || IS_DIRECT(h->sub_mb_type[1]) || IS_DIRECT(h->sub_mb_type[2]) || IS_DIRECT(h->sub_mb_type[3])) { pred_direct_motion(h, &mb_type); h->ref_cache[0][scan8[4]] = h->ref_cache[1][scan8[4]] = h->ref_cache[0][scan8[12]] = h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE; } }else{ assert(h->slice_type == P_TYPE || h->slice_type == SP_TYPE); //FIXME SP correct ? for(i=0; i<4; i++){ h->sub_mb_type[i]= get_ue_golomb(&s->gb); if(h->sub_mb_type[i] >=4){ 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); return -1; } sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count; h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type; } } for(list=0; list<h->list_count; list++){ int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list]; for(i=0; i<4; i++){ if(IS_DIRECT(h->sub_mb_type[i])) continue; if(IS_DIR(h->sub_mb_type[i], 0, list)){ unsigned int tmp = get_te0_golomb(&s->gb, ref_count); //FIXME init to 0 before and skip? if(tmp>=ref_count){ av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp); return -1; } ref[list][i]= tmp; }else{ //FIXME ref[list][i] = -1; } } } if(dct8x8_allowed) dct8x8_allowed = get_dct8x8_allowed(h); for(list=0; list<h->list_count; list++){ for(i=0; i<4; i++){ if(IS_DIRECT(h->sub_mb_type[i])) { h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ]; continue; } h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ]= h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i]; if(IS_DIR(h->sub_mb_type[i], 0, list)){ const int sub_mb_type= h->sub_mb_type[i]; const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1; for(j=0; j<sub_partition_count[i]; j++){ int mx, my; const int index= 4*i + block_width*j; int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ]; pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my); mx += get_se_golomb(&s->gb); my += get_se_golomb(&s->gb); tprintf(s->avctx, "final mv:%d %d\n", mx, my); if(IS_SUB_8X8(sub_mb_type)){ mv_cache[ 1 ][0]= mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx; mv_cache[ 1 ][1]= mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my; }else if(IS_SUB_8X4(sub_mb_type)){ mv_cache[ 1 ][0]= mx; mv_cache[ 1 ][1]= my; }else if(IS_SUB_4X8(sub_mb_type)){ mv_cache[ 8 ][0]= mx; mv_cache[ 8 ][1]= my; } mv_cache[ 0 ][0]= mx; mv_cache[ 0 ][1]= my; } }else{ uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0]; p[0] = p[1]= p[8] = p[9]= 0; } } } }else if(IS_DIRECT(mb_type)){ pred_direct_motion(h, &mb_type); dct8x8_allowed &= h->sps.direct_8x8_inference_flag; }else{ int list, mx, my, i; //FIXME we should set ref_idx_l? to 0 if we use that later ... if(IS_16X16(mb_type)){ for(list=0; list<h->list_count; list++){ unsigned int val; if(IS_DIR(mb_type, 0, list)){ val= get_te0_golomb(&s->gb, h->ref_count[list]); if(val >= h->ref_count[list]){ av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); return -1; } }else val= LIST_NOT_USED&0xFF; fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1); } for(list=0; list<h->list_count; list++){ unsigned int val; if(IS_DIR(mb_type, 0, list)){ pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my); mx += get_se_golomb(&s->gb); my += get_se_golomb(&s->gb); tprintf(s->avctx, "final mv:%d %d\n", mx, my); val= pack16to32(mx,my); }else val=0; fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, val, 4); } } else if(IS_16X8(mb_type)){ for(list=0; list<h->list_count; list++){ for(i=0; i<2; i++){ unsigned int val; if(IS_DIR(mb_type, i, list)){ val= get_te0_golomb(&s->gb, h->ref_count[list]); if(val >= h->ref_count[list]){ av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); return -1; } }else val= LIST_NOT_USED&0xFF; fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1); } } for(list=0; list<h->list_count; list++){ for(i=0; i<2; i++){ unsigned int val; if(IS_DIR(mb_type, i, list)){ pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my); mx += get_se_golomb(&s->gb); my += get_se_golomb(&s->gb); tprintf(s->avctx, "final mv:%d %d\n", mx, my); val= pack16to32(mx,my); }else val=0; fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4); } } }else{ assert(IS_8X16(mb_type)); for(list=0; list<h->list_count; list++){ for(i=0; i<2; i++){ unsigned int val; if(IS_DIR(mb_type, i, list)){ //FIXME optimize val= get_te0_golomb(&s->gb, h->ref_count[list]); if(val >= h->ref_count[list]){ av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val); return -1; } }else val= LIST_NOT_USED&0xFF; fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1); } } for(list=0; list<h->list_count; list++){ for(i=0; i<2; i++){ unsigned int val; if(IS_DIR(mb_type, i, list)){ pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my); mx += get_se_golomb(&s->gb); my += get_se_golomb(&s->gb); tprintf(s->avctx, "final mv:%d %d\n", mx, my); val= pack16to32(mx,my); }else val=0; fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4); } } } } if(IS_INTER(mb_type)) write_back_motion(h, mb_type); if(!IS_INTRA16x16(mb_type)){ cbp= get_ue_golomb(&s->gb); if(cbp > 47){ av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y); return -1; } if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp]; else cbp= golomb_to_inter_cbp[cbp]; } h->cbp = cbp; if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){ if(get_bits1(&s->gb)) mb_type |= MB_TYPE_8x8DCT; } s->current_picture.mb_type[mb_xy]= mb_type; if(cbp || IS_INTRA16x16(mb_type)){ int i8x8, i4x4, chroma_idx; int chroma_qp, dquant; GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr; const uint8_t *scan, *scan8x8, *dc_scan; // fill_non_zero_count_cache(h); if(IS_INTERLACED(mb_type)){ scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0; scan= s->qscale ? h->field_scan : h->field_scan_q0; dc_scan= luma_dc_field_scan; }else{ scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0; scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0; dc_scan= luma_dc_zigzag_scan; } dquant= get_se_golomb(&s->gb); if( dquant > 25 || dquant < -26 ){ av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y); return -1; } s->qscale += dquant; if(((unsigned)s->qscale) > 51){ if(s->qscale<0) s->qscale+= 52; else s->qscale-= 52; } h->chroma_qp= chroma_qp= get_chroma_qp(h->pps.chroma_qp_index_offset, s->qscale); if(IS_INTRA16x16(mb_type)){ if( decode_residual(h, h->intra_gb_ptr, h->mb, LUMA_DC_BLOCK_INDEX, dc_scan, h->dequant4_coeff[0][s->qscale], 16) < 0){ return -1; //FIXME continue if partitioned and other return -1 too } assert((cbp&15) == 0 || (cbp&15) == 15); if(cbp&15){ for(i8x8=0; i8x8<4; i8x8++){ for(i4x4=0; i4x4<4; i4x4++){ const int index= i4x4 + 4*i8x8; if( decode_residual(h, h->intra_gb_ptr, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){ return -1; } } } }else{ fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1); } }else{ for(i8x8=0; i8x8<4; i8x8++){ if(cbp & (1<<i8x8)){ if(IS_8x8DCT(mb_type)){ DCTELEM *buf = &h->mb[64*i8x8]; uint8_t *nnz; for(i4x4=0; i4x4<4; i4x4++){ if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 ) return -1; } nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ]; nnz[0] += nnz[1] + nnz[8] + nnz[9]; }else{ for(i4x4=0; i4x4<4; i4x4++){ const int index= i4x4 + 4*i8x8; if( decode_residual(h, gb, h->mb + 16*index, index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){ return -1; } } } }else{ uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ]; nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0; } } } if(cbp&0x30){ for(chroma_idx=0; chroma_idx<2; chroma_idx++) if( decode_residual(h, gb, h->mb + 256 + 16*4*chroma_idx, CHROMA_DC_BLOCK_INDEX, chroma_dc_scan, NULL, 4) < 0){ return -1; } } if(cbp&0x20){ for(chroma_idx=0; chroma_idx<2; chroma_idx++){ const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][chroma_qp]; for(i4x4=0; i4x4<4; i4x4++){ const int index= 16 + 4*chroma_idx + i4x4; if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){ return -1; } } } }else{ uint8_t * const nnz= &h->non_zero_count_cache[0]; nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] = nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0; } }else{ uint8_t * const nnz= &h->non_zero_count_cache[0]; fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1); nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] = nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0; } s->current_picture.qscale_table[mb_xy]= s->qscale; write_back_non_zero_count(h); if(MB_MBAFF){ h->ref_count[0] >>= 1; h->ref_count[1] >>= 1; } return 0; }