void choose_layer (ConfigSVC *Config)
{
if (GetLastDqId() == -1){
int DecMaxLayer = GetMaxDecLayer();
int WantedDqId = Config -> SetLayer;
if ( WantedDqId >= 15 && WantedDqId <= (DecMaxLayer << 4) || WantedDqId < 16 && WantedDqId <= DecMaxLayer ){
SetLastDqId(WantedDqId);
}else {
WantedDqId = 0;
SetLastDqId (0);
}
}
}
void switch_layer(int *NumOfLayers, NAL *Nal,decoder_context* pdecoder_context)
{
int LayerChanged = GetLayerChanged();
int TemporalId = *NumOfLayers >> 16;
int WantedDqId = *NumOfLayers & 0xff;
if(LayerChanged ){
//IDR frame and a valid command to change of layer
int i ;
int test = 0;
int SaveDqId = GetSaveDqId();
for ( i = 0; i < 8; i++){
if (SaveDqId == Nal -> layer_id_table[i]){
//we find it
break;
} else if(i < 7 && SaveDqId > Nal -> layer_id_table[i] && Nal -> layer_id_table[i + 1] == -1){
//we did not find it, but we should wait
test = 1;
break;
}else if (i < 7 && SaveDqId > Nal -> layer_id_table[i] && SaveDqId < Nal -> layer_id_table[i + 1]){
//we did not find it, but the value must be wrong, so we choose another one
test = 2;
break;
}
}
if ( test != 1){
if (test == 2){
//The DQId has not been found.
//we know that the DQId wanted, is between the layer_id_table [i] and layer_id_table [i + 1]
WantedDqId = Nal -> layer_id_table [i + 1];
SetSaveDqId(SaveDqId);
}
else {
int WantedLayer = GetLayerNumber(Nal, SaveDqId);
//we have to update the WantedDqId parameter to decode correctly the base layer if it's the one wanted
if (WantedLayer < pdecoder_context -> MaxNumLayer){
WantedDqId = Nal -> layer_id_table[WantedLayer];
}else {
WantedDqId = Nal -> layer_id_table[pdecoder_context -> MaxNumLayer - 1];
}
}
SaveDqId = Nal -> DqIdToDisplay = Nal -> DqIdWanted = WantedDqId;
SetArgLayer(SaveDqId);
SetLastDqId(SaveDqId);
ResetLayerChanged();
}else {
Nal -> DqIdToDisplay = WantedDqId = SaveDqId;
}
}
*NumOfLayers = (TemporalId << 16) + WantedDqId;
}