📄 macroblock.c
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fw_rFrameL = mb_left.available ?
img->mb_data[mb_left.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y] < 0?
dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y] :
dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y] * 2: -1;
fw_rFrameU = mb_up.available ?
img->mb_data[mb_up.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] < 0?
dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] :
dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] * 2: -1;
fw_rFrameUL = mb_upleft.available ?
img->mb_data[mb_upleft.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y] < 0?
dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y] :
dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y] *2: -1;
fw_rFrameUR = mb_upright.available ?
img->mb_data[mb_upright.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] < 0 ?
dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] :
dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] * 2: fw_rFrameUL;
bw_rFrameL = mb_left.available ?
img->mb_data[mb_left.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] :
dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] * 2: -1;
bw_rFrameU = mb_up.available ?
img->mb_data[mb_up.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] :
dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] * 2: -1;
bw_rFrameUL = mb_upleft.available ?
img->mb_data[mb_upleft.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] :
dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] *2: -1;
bw_rFrameUR = mb_upright.available ?
img->mb_data[mb_upright.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] :
dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] * 2: bw_rFrameUL;
}
else
{
fw_rFrameL = mb_left.available ?
img->mb_data[mb_left.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y] < 0 ?
dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y] >> 1 :
dec_picture->ref_idx[LIST_0][mb_left.pos_x][mb_left.pos_y]: -1;
fw_rFrameU = mb_up.available ?
img->mb_data[mb_up.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] < 0 ?
dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] >> 1 :
dec_picture->ref_idx[LIST_0][mb_up.pos_x][mb_up.pos_y] : -1;
fw_rFrameUL = mb_upleft.available ?
img->mb_data[mb_upleft.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y] < 0 ?
dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y]>> 1 :
dec_picture->ref_idx[LIST_0][mb_upleft.pos_x][mb_upleft.pos_y] : -1;
fw_rFrameUR = mb_upright.available ?
img->mb_data[mb_upright.mb_addr].mb_field || dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] < 0 ?
dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] >> 1 :
dec_picture->ref_idx[LIST_0][mb_upright.pos_x][mb_upright.pos_y] : fw_rFrameUL;
bw_rFrameL = mb_left.available ?
img->mb_data[mb_left.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] >> 1 :
dec_picture->ref_idx[LIST_1][mb_left.pos_x][mb_left.pos_y] : -1;
bw_rFrameU = mb_up.available ?
img->mb_data[mb_up.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] >> 1 :
dec_picture->ref_idx[LIST_1][mb_up.pos_x][mb_up.pos_y] : -1;
bw_rFrameUL = mb_upleft.available ?
img->mb_data[mb_upleft.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] >> 1 :
dec_picture->ref_idx[LIST_1][mb_upleft.pos_x][mb_upleft.pos_y] : -1;
bw_rFrameUR = mb_upright.available ?
img->mb_data[mb_upright.mb_addr].mb_field || dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] < 0 ?
dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] >> 1:
dec_picture->ref_idx[LIST_1][mb_upright.pos_x][mb_upright.pos_y] : bw_rFrameUL;
}
}
fw_rFrame = (fw_rFrameL >= 0 && fw_rFrameU >= 0) ? min(fw_rFrameL,fw_rFrameU): max(fw_rFrameL,fw_rFrameU);
fw_rFrame = (fw_rFrame >= 0 && fw_rFrameUR >= 0) ? min(fw_rFrame,fw_rFrameUR): max(fw_rFrame,fw_rFrameUR);
bw_rFrame = (bw_rFrameL >= 0 && bw_rFrameU >= 0) ? min(bw_rFrameL,bw_rFrameU): max(bw_rFrameL,bw_rFrameU);
bw_rFrame = (bw_rFrame >= 0 && bw_rFrameUR >= 0) ? min(bw_rFrame,bw_rFrameUR): max(bw_rFrame,bw_rFrameUR);
if (fw_rFrame >=0)
SetMotionVectorPredictor (img, pmvfw, pmvfw+1, fw_rFrame, LIST_0, dec_picture->ref_idx, dec_picture->mv, 0, 0, 16, 16);
if (bw_rFrame >=0)
SetMotionVectorPredictor (img, pmvbw, pmvbw+1, bw_rFrame, LIST_1, dec_picture->ref_idx, dec_picture->mv, 0, 0, 16, 16);
for (i=0;i<4;i++)
{
if (currMB->b8mode[i] == 0)
for(j=2*(i/2);j<2*(i/2)+2;j++)
for(k=2*(i%2);k<2*(i%2)+2;k++)
{
int j6 = imgblock_y+j;
j4 = img->block_y+j;
i4 = img->block_x+k;
if (fw_rFrame >= 0)
{
if (!fw_rFrame && ((!moving_block[i4][j6]) && (!listX[1+list_offset][0]->is_long_term)))
{
dec_picture->mv [LIST_0][i4][j4][0] = 0;
dec_picture->mv [LIST_0][i4][j4][1] = 0;
dec_picture->ref_idx[LIST_0][i4][j4] = 0;
}
else
{
dec_picture->mv [LIST_0][i4][j4][0] = pmvfw[0];
dec_picture->mv [LIST_0][i4][j4][1] = pmvfw[1];
dec_picture->ref_idx[LIST_0][i4][j4] = fw_rFrame;
}
}
else
{
dec_picture->mv [LIST_0][i4][j4][0] = 0;
dec_picture->mv [LIST_0][i4][j4][1] = 0;
dec_picture->ref_idx[LIST_0][i4][j4] = -1;
}
if (bw_rFrame >= 0)
{
if (bw_rFrame==0 && ((!moving_block[i4][j6])&& (!listX[1+list_offset][0]->is_long_term)))
{
dec_picture->mv [LIST_1][i4][j4][0] = 0;
dec_picture->mv [LIST_1][i4][j4][1] = 0;
dec_picture->ref_idx[LIST_1][i4][j4] = 0;
}
else
{
dec_picture->mv [LIST_1][i4][j4][0] = pmvbw[0];
dec_picture->mv [LIST_1][i4][j4][1] = pmvbw[1];
dec_picture->ref_idx[LIST_1][i4][j4] = bw_rFrame;
}
}
else
{
dec_picture->mv [LIST_1][i4][j4][0] = 0;
dec_picture->mv [LIST_1][i4][j4][1] = 0;
dec_picture->ref_idx[LIST_1][i4][j4] = -1;
}
if (fw_rFrame <0 && bw_rFrame <0)
{
dec_picture->ref_idx[LIST_0][i4][j4] = 0;
dec_picture->ref_idx[LIST_1][i4][j4] = 0;
}
}
}
}
else
{
for (i=0;i<4;i++)
{
if (currMB->b8mode[i] == 0)
{
for(j=2*(i/2);j<2*(i/2)+2;j++)
{
for(k=2*(i%2);k<2*(i%2)+2;k++)
{
int list_offset = ((img->MbaffFrameFlag)&&(currMB->mb_field))? img->current_mb_nr%2 ? 4 : 2 : 0;
int imgblock_y= ((img->MbaffFrameFlag)&&(currMB->mb_field))? (img->current_mb_nr%2) ? (img->block_y-4)/2 : img->block_y/2 : img->block_y;
int refList = co_located_ref_idx[LIST_0 ][img->block_x+k][imgblock_y+j]== -1 ? LIST_1 : LIST_0;
int ref_idx = co_located_ref_idx[refList][img->block_x + k][imgblock_y + j];
int mapped_idx=-1, iref;
if (ref_idx == -1)
{
dec_picture->ref_idx [LIST_0][img->block_x + k][img->block_y + j] = 0;
dec_picture->ref_idx [LIST_1][img->block_x + k][img->block_y + j] = 0;
}
else
{
for (iref=0;iref<min(img->num_ref_idx_l0_active,listXsize[LIST_0 + list_offset]);iref++)
{
if (dec_picture->ref_pic_num[img->current_slice_nr][LIST_0 + list_offset][iref]==co_located_ref_id[refList][img->block_x + k][imgblock_y + j])
{
mapped_idx=iref;
break;
}
else //! invalid index. Default to zero even though this case should not happen
mapped_idx=INVALIDINDEX;
}
if (INVALIDINDEX == mapped_idx)
{
error("temporal direct error\ncolocated block has ref that is unavailable",-1111);
}
dec_picture->ref_idx [LIST_0][img->block_x + k][img->block_y + j] = mapped_idx;
dec_picture->ref_idx [LIST_1][img->block_x + k][img->block_y + j] = 0;
}
}
}
}
}
}
}
// If multiple ref. frames, read reference frame for the MB *********************************
if(img->num_ref_idx_l0_active>1)
{
flag_mode = ( img->num_ref_idx_l0_active == 2 ? 1 : 0);
currSE.type = SE_REFFRAME;
dP = &(currSlice->partArr[partMap[SE_REFFRAME]]);
if (active_pps->entropy_coding_mode_flag == UVLC || dP->bitstream->ei_flag) currSE.mapping = linfo_ue;
else currSE.reading = readRefFrame_CABAC;
for (j0=0; j0<4; j0+=step_v0)
{
for (i0=0; i0<4; i0+=step_h0)
{
k=2*(j0/2)+(i0/2);
if ((currMB->b8pdir[k]==0 || currMB->b8pdir[k]==2) && currMB->b8mode[k]!=0)
{
TRACE_STRING("ref_idx_l0");
img->subblock_x = i0;
img->subblock_y = j0;
if (!IS_P8x8 (currMB) || bframe || (!bframe && !img->allrefzero))
{
currSE.context = BType2CtxRef (currMB->b8mode[k]);
if( (active_pps->entropy_coding_mode_flag == UVLC || dP->bitstream->ei_flag) && flag_mode )
{
currSE.len = 1;
readSyntaxElement_FLC(&currSE, dP->bitstream);
currSE.value1 = 1 - currSE.value1;
}
else
{
currSE.value2 = LIST_0;
dP->readSyntaxElement (&currSE,img,inp,dP);
}
refframe = currSE.value1;
}
else
{
refframe = 0;
}
/*
if (bframe && refframe>img->buf_cycle) // img->buf_cycle should be correct for field MBs now
{
set_ec_flag(SE_REFFRAME);
refframe = 1;
}
*/
for (j=j0; j<j0+step_v0;j++)
for (i=i0; i<i0+step_h0;i++)
{
dec_picture->ref_idx[LIST_0][img->block_x + i][img->block_y + j] = refframe;
}
}
}
}
}
else
{
for (j0=0; j0<4; j0+=step_v0)
{
for (i0=0; i0<4; i0+=step_h0)
{
k=2*(j0/2)+(i0/2);
if ((currMB->b8pdir[k]==0 || currMB->b8pdir[k]==2) && currMB->b8mode[k]!=0)
{
for (j=j0; j<j0+step_v0;j++)
for (i=i0; i<i0+step_h0;i++)
{
dec_picture->ref_idx[LIST_0][img->block_x + i][img->block_y + j] = 0;
}
}
}
}
}
// If backward multiple ref. frames, read backward reference frame for the MB *********************************
if(img->num_ref_idx_l1_active>1)
{
flag_mode = ( img->num_ref_idx_l1_active == 2 ? 1 : 0);
currSE.type = SE_REFFRAME;
dP = &(currSlice->partArr[partMap[SE_REFFRAME]]);
if (active_pps->entropy_coding_mode_flag == UVLC || dP->bitstream->ei_flag) currSE.mapping = linfo_ue;
else currSE.reading = readRefFrame_CABAC;
for (j0=0; j0<4; j0+=step_v0)
{
for (i0=0; i0<4; i0+=step_h0)
{
k=2*(j0/2)+(i0/2);
if ((currMB->b8pdir[k]==1 || currMB->b8pdir[k]==2) && currMB->b8mode[k]!=0)
{
TRACE_STRING("ref_idx_l1");
img->subblock_x = i0;
img->subblock_y = j0;
currSE.context = BType2CtxRef (currMB->b8mode[k]);
if( (active_pps->entropy_coding_mode_flag == UVLC || dP->bitstream->ei_flag) && flag_mode )
{
currSE.len = 1;
readSyntaxElement_FLC(&currSE, dP->bitstream);
currSE.value1 = 1-currSE.value1;
}
else
{
currSE.value2 = LIST_1;
dP->readSyntaxElement (&currSE,img,inp,dP);
}
refframe = currSE.value1;
for (j=j0; j<j0+step_v0;j++)
{
for (i=i0; i<i0+step_h0;i++)
{
dec_picture->ref_idx[LIST_1][img->block_x + i][img->block_y + j] = refframe;
}
}
}
}
}
}
else
{
for (j0=0; j0<4; j0+=step_v0)
{
for (i0=0; i0<4; i0+=step_h0)
{
k=2*(j0/2)+(i0/2);
if ((currMB->b8pdir[k]==1 || currMB->b8pdir[k]==2) && currMB->b8mode[k]!=0)
{
for (j=j0; j<j0+step_v0;j++)
for (i=i0; i<i0+step_h0;i++)
{
dec_picture->ref_idx[LIST_1][img->block_x + i][img->block_y + j] = 0;
}
}
}
}
}
//===== READ FORWARD MOTION VECTORS =====
currSE.type = SE_MVD;
dP = &(currSlice->partArr[partMap[SE_MVD]]);
if (active_pps->entropy_coding_mode_flag == UVLC || dP->bitstream->ei_flag) currSE.mapping = linfo_se;
else currSE.reading = readMVD_CABAC;
for (j0=0; j0<4; j0+=step_v0)
for (i0=0; i0<4; i0+=step_h0)
{
k=2*(j0/2)+(i0/2);
if ((currMB->b8pdir[k]==0 || currMB->b8pdir[k]==2) && (currMB->b8mode[k] !=0))//has forward vector
{
mv_mode = currMB->b8mode[k];
step_h = BLOCK_STEP [mv_mode][0];
step_v = BLOCK_STEP [mv_mode][1];
refframe = dec_picture->ref_idx[LIST_0][img->block_x+i0][img->block_y+j0];
for (j=j0; j<j0+step_v0; j+=step_v)
{
for (i=i0; i<i0+step_h0; i+=step_h)
{
j4 = img->block_y+j;
i4 = img->block_x+i;
// first make mv-prediction
SetMotionVectorPredictor (img, pmv, pmv+1, refframe, LIST_0, dec_picture->ref_idx, dec_pictu⌨️ 快捷键说明
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