/**
This function is used to decode the sub macroblock information in a B slice.
*/
int SubMbBCabacSVC ( int *dct_allowed, int Dir8x8infFlag, CABACContext *c, unsigned char *state, SLICE *slice, DATA *macroblock,
RESIDU *CurrentResidu, short mv_cache_l0[][2], short ref_cache_l0[], short mv_cache_l1[][2], short ref_cache_l1[])
{
int mbPartIdx ;
//Recovery of the sub-macroblock type
for ( mbPartIdx = 0 ; mbPartIdx < 4 ; mbPartIdx++ ) {
CurrentResidu -> SubMbType [mbPartIdx] = decode_cabac_b_mb_sub_type( c, state);
}
#ifdef ERROR_DETECTION
//Error detection
if(ErrorsCheckSubMbType( CurrentResidu -> SubMbType, MaxBSubMbType)){
//should be set to zero because the macroblock will be decoded.
memset(ref_cache_l0, 0, 48 * sizeof(short));
memset(ref_cache_l1, 0, 48 * sizeof(short));
return 1;
}
#endif
if(GetCabacSVCBSubMotionPred(c, state, slice, macroblock -> MotionPredL0, CurrentResidu -> SubMbType,
4, CurrentResidu -> InCropWindow, 0, Pred_L1)){
return 1;
}
if(GetCabacSVCBSubMotionPred(c, state, slice, macroblock -> MotionPredL1, CurrentResidu -> SubMbType,
4, CurrentResidu -> InCropWindow, 1, Pred_L0)){
return 1;
}
//L0 and L1 reference index
if(GetCabacBSubRefList(c, state, macroblock -> RefIdxL0, ref_cache_l0, macroblock -> MotionPredL0,
CurrentResidu -> SubMbType, slice -> num_RefIdxL0_active_minus1, Pred_L1)){
return 1;
}
if(GetCabacBSubRefList(c, state, macroblock -> RefIdxL1, ref_cache_l1, macroblock -> MotionPredL1,
CurrentResidu -> SubMbType, slice -> num_RefIdxL1_active_minus1, Pred_L0)){
return 1;
}
//Recovery of the motion vector of each sub-macroblock
ReadCabac8x8MotionVector(c, state, CurrentResidu, slice, mv_cache_l0, macroblock -> MvdL0, Pred_L1);
ReadCabac8x8MotionVector(c, state, CurrentResidu, slice, mv_cache_l1, macroblock -> MvdL1, Pred_L0);
for ( mbPartIdx = 0; mbPartIdx < 4 && *dct_allowed; mbPartIdx ++){
if ( !((sub_num_b_part[ CurrentResidu -> SubMbType[mbPartIdx]] == 1) ||
(Dir8x8infFlag && sub_mb_b_name[CurrentResidu -> SubMbType[mbPartIdx]] == B_direct))){
*dct_allowed = 0;
}
}
return 0;
}
char sub_mb_pred_cabac ( int *dct_allowed, CABACContext *c, unsigned char *state, SLICE *slice, RESIDU *Current_residu,
short mv_cache_l0[][2], short mv_cache_l1[][2], short *ref_cache_l0, short *ref_cache_l1,
short mvl0_cache[][2], short mvl1_cache[][2], short *refl0_cache, short *refl1_cache,
short *mvl1_l0, short *mvl1_l1, short *refl1_l0, short *refl1_l1,
int direct_8x8_inference_flag, int long_term, int slice_type, int is_svc)
{
int mbPartIdx ;
char RefIdxL0[4] = {0, 0, 0, 0};
char RefIdxL1[4] = {0, 0, 0, 0};
//Recovery of the sub-macroblock type
for ( mbPartIdx = 0 ; mbPartIdx < 4 ; mbPartIdx++ ) {
Current_residu -> SubMbType [mbPartIdx] = decode_cabac_b_mb_sub_type( c, state);
}
#ifdef ERROR_DETECTION
//Error detection
if(ErrorsCheckSubMbType( Current_residu -> SubMbType, MaxBSubMbType)){
//should be set to zero because the macroblock will be decoded.
refl0_cache [12] = refl0_cache [14] = refl0_cache [28] = refl0_cache [30] = 0;
refl1_cache [12] = refl1_cache [14] = refl1_cache [28] = refl1_cache [30] = 0;
return 1;
}
#endif
//L0 and L1 reference index
if(GetCabacBSubRefList(c, state, RefIdxL0, ref_cache_l0, RefIdxL0, Current_residu -> SubMbType, slice -> num_RefIdxL0_active_minus1, Pred_L1)){
refl0_cache [12] = refl0_cache [14] = refl0_cache [28] = refl0_cache [30] = 0;
refl1_cache [12] = refl1_cache [14] = refl1_cache [28] = refl1_cache [30] = 0;
return 1;
}
if(GetCabacBSubRefList(c, state, RefIdxL1, ref_cache_l1, RefIdxL1, Current_residu -> SubMbType, slice -> num_RefIdxL1_active_minus1, Pred_L0)){
refl1_cache [12] = refl1_cache [14] = refl1_cache [28] = refl1_cache [30] = 0;
return 1;
}
//Recovery of the motion vector of each sub-macroblock
for ( mbPartIdx = 0 ; mbPartIdx < 4 ; mbPartIdx++ ) {
int sub_mb_type = Current_residu -> SubMbType [mbPartIdx];
if ( sub_mb_b_name[sub_mb_type] == B_direct){
int ind = SCAN8(mbPartIdx << 2);
short mv[2] = {0, 0};
refill_mv(2, 2, mv, &mv_cache_l0[ind]);
if (slice -> direct_spatial_mv_pred_flag){
spatial_direct_prediction_l0(mvl0_cache, mvl1_l0, mvl1_l1, refl0_cache, refl1_cache, refl1_l0, refl1_l1,
mbPartIdx, slice -> b_stride, slice -> b8_stride, direct_8x8_inference_flag, long_term, is_svc, slice_type);
}else{
temporal_direct_prediction_l0(mvl0_cache, mvl1_l0, refl0_cache, refl1_l0, refl1_l1, slice,
mbPartIdx, direct_8x8_inference_flag, is_svc, slice_type);
}
}else if (sub_mb_b_name[sub_mb_type] != Pred_L1 ) {
ReadAndComputeCabac8x8MotionVector( c, state, mbPartIdx, sub_mb_type, RefIdxL0, refl0_cache, mv_cache_l0, mvl0_cache, 1);
}else {
int ind = SCAN8(mbPartIdx << 2);
short mv[2] = {0, 0};
refill_mv(2, 2, mv, &mv_cache_l0[ind]);
refill_ref(2, 2, -1, &refl0_cache[ind]);
}
}
//Recovery of the motion vector of each sub-macroblock
for ( mbPartIdx = 0 ; mbPartIdx < 4 ; mbPartIdx++ ) {
int sub_mb_type = Current_residu -> SubMbType [mbPartIdx];
if ( sub_mb_b_name[ sub_mb_type] == B_direct){
int ind = SCAN8(mbPartIdx << 2);
short mv[2] = {0, 0};
refill_mv(2, 2, mv, &mv_cache_l1[ind]);
if (slice -> direct_spatial_mv_pred_flag){
spatial_direct_prediction_l1(mvl1_cache, mvl1_l0, mvl1_l1, refl0_cache, refl1_cache, refl1_l0, refl1_l1
, mbPartIdx, slice -> b_stride, slice -> b8_stride, direct_8x8_inference_flag, long_term, is_svc , slice_type);
}else{
temporal_direct_prediction_l1(mvl1_cache, mvl1_l0, refl1_cache, refl1_l0, refl1_l1,slice
, mbPartIdx, direct_8x8_inference_flag, is_svc, slice_type);
}
}else if (sub_mb_b_name[sub_mb_type] != Pred_L0 ) {
ReadAndComputeCabac8x8MotionVector( c, state, mbPartIdx, sub_mb_type, RefIdxL1, refl1_cache, mv_cache_l1, mvl1_cache, 1);
}else{
int ind = SCAN8(mbPartIdx << 2);
short mv[2] = {0, 0};
refill_mv(2, 2, mv, &mv_cache_l1[ind]);
refill_ref(2, 2, -1, &refl1_cache[ind]);
}
}
for ( mbPartIdx = 0; mbPartIdx < 4 && *dct_allowed; mbPartIdx ++){
if ( !((sub_num_b_part[Current_residu -> SubMbType[mbPartIdx]] == 1) || ( direct_8x8_inference_flag && sub_mb_b_name[Current_residu -> SubMbType[mbPartIdx]] == B_direct))){
*dct_allowed = 0;
}
}
return 0;
}
