GF_Err gf_bifs_dec_unquant_field(GF_BifsDecoder *codec, GF_BitStream *bs, GF_Node *node, GF_FieldInfo *field)
{
Bool HasQ;
u8 QType, AType;
u32 NbBits;
Fixed b_min, b_max;
SFVec3f BMin, BMax;
GF_Err e;
/*check QP*/
if (!codec->ActiveQP) return GF_EOS;
/*check FieldType*/
switch (field->fieldType) {
case GF_SG_VRML_SFINT32:
case GF_SG_VRML_SFFLOAT:
case GF_SG_VRML_SFROTATION:
case GF_SG_VRML_SFVEC2F:
case GF_SG_VRML_SFVEC3F:
break;
case GF_SG_VRML_SFCOLOR:
break;
default:
return GF_EOS;
}
/*check NDT*/
HasQ = gf_bifs_get_aq_info(node, field->fieldIndex, &QType, &AType, &b_min, &b_max, &NbBits);
if (!HasQ || !QType) return GF_EOS;
/*get NbBits for QP14 (QC_COORD_INDEX)*/
if (QType == QC_COORD_INDEX) {
NbBits = gf_bifs_dec_qp14_get_bits(codec);
/*QP14 is always on, not having NbBits set means the coord field is set after the index field, hence not decodable*/
if (!NbBits) return GF_NON_COMPLIANT_BITSTREAM;
}
BMin.x = BMin.y = BMin.z = b_min;
BMax.x = BMax.y = BMax.z = b_max;
/*check is the QP is on and retrieves the bounds*/
if (!Q_IsTypeOn(codec->ActiveQP, QType, &NbBits, &BMin, &BMax)) return GF_EOS;
/*ok the field is Quantized, dequantize*/
switch (QType) {
//these are all SFFloat quantized on n fields
case QC_3DPOS:
case QC_2DPOS:
case QC_ORDER:
case QC_COLOR:
case QC_TEXTURE_COORD:
case QC_ANGLE:
case QC_SCALE:
case QC_INTERPOL_KEYS:
case QC_SIZE_3D:
case QC_SIZE_2D:
e = Q_DecFloat(codec, bs, field->fieldType, BMin, BMax, NbBits, field->far_ptr);
break;
//SFInt types
case QC_LINEAR_SCALAR:
case QC_COORD_INDEX:
e = Q_DecInt(codec, bs, QType, (SFInt32) b_min, NbBits, field->far_ptr);
break;
//normalized fields (normals and vectors)
case QC_NORMALS:
//normal quant is only for SFVec3F
if (field->fieldType != GF_SG_VRML_SFVEC3F) return GF_NON_COMPLIANT_BITSTREAM;
e = Q_DecNormal(codec, bs, NbBits, field->far_ptr);
break;
case QC_ROTATION:
//normal quant is only for SFRotation
if (field->fieldType != GF_SG_VRML_SFROTATION) return GF_NON_COMPLIANT_BITSTREAM;
e = Q_DecRotation(codec, bs, NbBits, field->far_ptr);
break;
default:
return GF_BAD_PARAM;
}
if (e) return e;
return GF_OK;
}
M4Err BD_UnquantizeField(BifsDecoder *codec, BitStream *bs, SFNode *node, FieldInfo *field)
{
Bool HasQ;
u8 QType, AType;
u32 NbBits;
Float b_min, b_max;
SFVec3f BMin, BMax;
M4Err e;
/*check QP*/
if (!codec->ActiveQP) return M4FieldNotQuantized;
/*check FieldType*/
switch (field->fieldType) {
case FT_SFInt32:
case FT_SFFloat:
case FT_SFRotation:
case FT_SFVec2f:
case FT_SFVec3f:
break;
case FT_SFColor:
break;
default:
return M4FieldNotQuantized;
}
/*check NDT*/
HasQ = Node_GetAQInfo(node, field->fieldIndex, &QType, &AType, &b_min, &b_max, &NbBits);
if (!HasQ || !QType) return M4FieldNotQuantized;
/*get NbBits for QP14 (QC_COORD_INDEX)*/
if (QType == QC_COORD_INDEX) {
NbBits = BD_GetCoordBits(codec);
/*QP14 is always on, not having NbBits set means the coord field is set after the index field, hence not decodable*/
if (!NbBits) return M4NonCompliantBitStream;
}
BMin.x = BMin.y = BMin.z = b_min;
BMax.x = BMax.y = BMax.z = b_max;
/*check is the QP is on and retrieves the bounds*/
if (!Q_IsTypeOn(codec->ActiveQP, QType, &NbBits, &BMin, &BMax)) return M4FieldNotQuantized;
/*ok the field is Quantized, dequantize*/
switch (QType) {
//these are all SFFloat quantized on n fields
case QC_3DPOS:
case QC_2DPOS:
case QC_ORDER:
case QC_COLOR:
case QC_TEXTURE_COORD:
case QC_ANGLE:
case QC_SCALE:
case QC_INTERPOL_KEYS:
case QC_SIZE_3D:
case QC_SIZE_2D:
e = Q_DecFloat(codec, bs, field->fieldType, BMin, BMax, NbBits, field->far_ptr);
break;
//SFInt types
case QC_LINEAR_SCALAR:
case QC_COORD_INDEX:
e = Q_DecInt(codec, bs, QType, (SFInt32) b_min, NbBits, field->far_ptr);
break;
//normalized fields (normals and vectors)
case QC_NORMALS:
//normal quant is only for SFVec3F
if (field->fieldType != FT_SFVec3f) return M4InvalidNode;
e = Q_DecNormal(codec, bs, NbBits, field->far_ptr);
break;
case QC_ROTATION:
//normal quant is only for SFRotation
if (field->fieldType != FT_SFRotation) return M4InvalidNode;
e = Q_DecRotation(codec, bs, NbBits, field->far_ptr);
break;
default:
return M4BadParam;
}
if (e) return e;
return M4OK;
}