/**
This function is used to decode the macroblock information in a B slice.
*/
int MbPredBCabacSvc ( CABACContext *c, unsigned char *state, SLICE *Slice, RESIDU *CurrResidu, DATA *macroblock,
short mv_cache_l0[][2], short ref_cache_l0[] , short mv_cache_l1[][2], short ref_cache_l1[])
{
int index = 14 * CurrResidu -> Mode;
//Get MotionPred flag
if(GetCabacSVCPMotionPred(c, state, Slice, macroblock, macroblock -> MotionPredL0, CurrResidu -> InCropWindow, Pred_L1, 0)){
//Error detected
return 1;
}
//Get MotionPred flag
if(GetCabacSVCPMotionPred(c, state, Slice, macroblock, macroblock -> MotionPredL1, CurrResidu -> InCropWindow, Pred_L0, 1)){
//Error detected
return 1;
}
if(GetCabacBRefList(c, state, macroblock -> RefIdxL0, ref_cache_l0, macroblock -> MotionPredL0, CurrResidu -> Mode,
Slice -> num_RefIdxL0_active_minus1, macroblock -> MbPartPredMode, Pred_L1, index)){
return 1;
}
if(GetCabacBRefList(c, state, macroblock -> RefIdxL1, ref_cache_l1, macroblock -> MotionPredL1, CurrResidu -> Mode,
Slice -> num_RefIdxL1_active_minus1, macroblock -> MbPartPredMode, Pred_L0, index)){
return 1;
}
if (CurrResidu -> Mode == 3){
// Pred_L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadCabacMotionVector(c, state, mv_cache_l0, ¯oblock -> MvdL0[0][0], 3, 12);
}
// Pred_L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadCabacMotionVector(c, state, mv_cache_l1, ¯oblock -> MvdL1[0][0], 3, 12);
}
}else if (CurrResidu -> Mode == 1){
//Recovery of of the motion vector for the frame P
// mode == 1: 8x16
//L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadCabacMotionVector(c, state, mv_cache_l0, ¯oblock -> MvdL0[0][0], 1, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L1 ) {
ReadCabacMotionVector(c, state, mv_cache_l0, ¯oblock -> MvdL0[4][0], 1, 14);
}
//L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadCabacMotionVector(c, state, mv_cache_l1, ¯oblock -> MvdL1[0][0], 1, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L0 ) {
ReadCabacMotionVector(c, state, mv_cache_l1, ¯oblock -> MvdL1[4][0], 1, 14);
}
}else{
//L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadCabacMotionVector(c, state, mv_cache_l0, ¯oblock -> MvdL0[0][0], 2, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L1 ) {
ReadCabacMotionVector(c, state, mv_cache_l0, ¯oblock -> MvdL0[4][0], 2, 28);
}
//L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadCabacMotionVector(c, state, mv_cache_l1, ¯oblock -> MvdL1[0][0], 2, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L0 ) {
ReadCabacMotionVector(c, state, mv_cache_l1, ¯oblock -> MvdL1[4][0], 2, 28);
}
}
return 0;
}
/**
Motion vector and reference list decoding process when cabac entropy for a B16x16 macroblock
*/
char mb_pred_cabac ( CABACContext *c, unsigned char *state, SLICE *slice, RESIDU *CurrResidu, DATA *macroblock,
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)
{
int index = 14 * CurrResidu -> Mode;
char RefIdxL0[2] = {0, 0};
char RefIdxL1[2] = {0, 0};
//Reference index for L0
if(GetCabacBRefList(c, state, RefIdxL0, ref_cache_l0, RefIdxL0, CurrResidu -> Mode, slice -> num_RefIdxL0_active_minus1,
macroblock -> MbPartPredMode, Pred_L1, index)){
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;
}
//Reference index for L0
if(GetCabacBRefList(c, state, RefIdxL1, ref_cache_l1, RefIdxL1, CurrResidu -> Mode, slice -> num_RefIdxL1_active_minus1,
macroblock -> MbPartPredMode, Pred_L0, index)){
refl1_cache [12] = refl1_cache [14] = refl1_cache [28] = refl1_cache [30] = 0;
return 1;
}
if (CurrResidu -> Mode == 3){
// Pred_L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadAndComputeCabac16x16MotionVector(c, state, RefIdxL0, refl0_cache, mv_cache_l0, mvl0_cache);
}else {
refl0_cache[14] = refl0_cache[30] = -1;
}
// Pred_L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadAndComputeCabac16x16MotionVector(c, state, RefIdxL1, refl1_cache, mv_cache_l1, mvl1_cache);
}else {
refl1_cache[14] = refl1_cache[30] = -1;
}
}else if (CurrResidu -> Mode == 1){
//Recovery of of the motion vector for the frame P
// mode == 1: 8x16
//L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadAndComputeCabac8x16MotionVector(c, state, RefIdxL0, refl0_cache, mv_cache_l0, mvl0_cache, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L1 ) {
ReadAndComputeCabac8x16MotionVector(c, state, &RefIdxL0[1], refl0_cache, mv_cache_l0, mvl0_cache, 14);
}else{
refl0_cache[14] = refl0_cache[30] = -1;
}
//L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadAndComputeCabac8x16MotionVector(c, state, RefIdxL1, refl1_cache, mv_cache_l1, mvl1_cache, 12);
}
if ( macroblock -> MbPartPredMode [1] != Pred_L0 ) {
ReadAndComputeCabac8x16MotionVector(c, state, &RefIdxL1[1], refl1_cache, mv_cache_l1, mvl1_cache, 14);
}else{
refl1_cache[14] = refl1_cache[30] = -1;
}
}else{
//L0 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L1 ) {
ReadAndComputeCabac16x8MotionVector(c, state, RefIdxL0, refl0_cache, mv_cache_l0, mvl0_cache, 12);
}else{
refl0_cache[14] = -1;
}
if ( macroblock -> MbPartPredMode [1] != Pred_L1 ) {
ReadAndComputeCabac16x8MotionVector(c, state, &RefIdxL0[1], refl0_cache, mv_cache_l0, mvl0_cache, 28);
}else{
refl0_cache[30] = -1;
}
//L1 prediction
if ( macroblock -> MbPartPredMode [0] != Pred_L0 ) {
ReadAndComputeCabac16x8MotionVector(c, state, RefIdxL1, refl1_cache, mv_cache_l1, mvl1_cache, 12);
}else{
refl1_cache[14] = -1;
}
if ( macroblock -> MbPartPredMode [1] != Pred_L0 ) {
ReadAndComputeCabac16x8MotionVector(c, state, &RefIdxL1[1], refl1_cache, mv_cache_l1, mvl1_cache, 28);
}else{
refl1_cache[30] = -1;
}
}
return 0;
}
