//
// Reader
//
M4Err ReadOD(BitStream *bs, ObjectDescriptor *od, u32 DescSize)
{
M4Err e;
u32 reserved, urlflag;
u32 tmpSize, nbBytes = 0;
if (! od) return M4BadParam;
od->objectDescriptorID = BS_ReadInt(bs, 10);
urlflag = BS_ReadInt(bs, 1);
reserved = BS_ReadInt(bs, 5);
nbBytes += 2;
if (urlflag) {
e = OD_ReadString(bs, & od->URLString, 1);
if (e) return e;
nbBytes += strlen(od->URLString) + 1;
}
while (nbBytes < DescSize) {
Descriptor *tmp = NULL;
e = ParseDescriptor(bs, &tmp, &tmpSize);
if (e) return e;
if (!tmp) return M4ReadDescriptorFailed;
e = AddDescriptorToOD(od, tmp);
if (e) return e;
nbBytes += tmpSize + GetSizeFieldSize(tmpSize);
}
if (nbBytes != DescSize) return M4ReadDescriptorFailed;
return M4OK;
}
//This functions handles internally what desc can be added to another desc
//and adds it. NO DUPLICATION of the descriptor, so
//once a desc is added to its parent, destroying the parent WILL destroy this desc
GF_EXPORT
GF_Err gf_odf_desc_add_desc(GF_Descriptor *parentDesc, GF_Descriptor *newDesc)
{
GF_DecoderConfig *dcd;
//our ADD definition
GF_Err AddDescriptorToOD(GF_ObjectDescriptor *od, GF_Descriptor *desc);
GF_Err AddDescriptorToIOD(GF_InitialObjectDescriptor *iod, GF_Descriptor *desc);
GF_Err AddDescriptorToESD(GF_ESD *esd, GF_Descriptor *desc);
GF_Err AddDescriptorToIsomIOD(GF_IsomInitialObjectDescriptor *iod, GF_Descriptor *desc);
GF_Err AddDescriptorToIsomOD(GF_IsomObjectDescriptor *od, GF_Descriptor *desc);
if (!parentDesc || !newDesc) return GF_BAD_PARAM;
switch (parentDesc->tag) {
//these are container descriptors
case GF_ODF_OD_TAG:
return AddDescriptorToOD((GF_ObjectDescriptor *)parentDesc, newDesc);
case GF_ODF_IOD_TAG:
return AddDescriptorToIOD((GF_InitialObjectDescriptor *)parentDesc, newDesc);
case GF_ODF_ESD_TAG:
return AddDescriptorToESD((GF_ESD *)parentDesc, newDesc);
case GF_ODF_DCD_TAG:
dcd = (GF_DecoderConfig *)parentDesc;
if ((newDesc->tag == GF_ODF_DSI_TAG)
|| (newDesc->tag == GF_ODF_BIFS_CFG_TAG)
|| (newDesc->tag == GF_ODF_UI_CFG_TAG)
|| (newDesc->tag == GF_ODF_TEXT_CFG_TAG)
) {
if (dcd->decoderSpecificInfo) return GF_ODF_FORBIDDEN_DESCRIPTOR;
dcd->decoderSpecificInfo = (GF_DefaultDescriptor *)newDesc;
return GF_OK;
}
else if (newDesc->tag == GF_ODF_EXT_PL_TAG) {
return gf_list_add(dcd->profileLevelIndicationIndexDescriptor, newDesc);
}
return GF_ODF_FORBIDDEN_DESCRIPTOR;
case GF_ODF_TEXT_CFG_TAG:
if (newDesc->tag != GF_ODF_TX3G_TAG) return GF_ODF_FORBIDDEN_DESCRIPTOR;
return gf_list_add(((GF_TextConfig *)parentDesc)->sample_descriptions, newDesc);
case GF_ODF_QOS_TAG:
return GF_BAD_PARAM;
//MP4 File Format tags
case GF_ODF_ISOM_IOD_TAG:
return AddDescriptorToIsomIOD((GF_IsomInitialObjectDescriptor *)parentDesc, newDesc);
case GF_ODF_ISOM_OD_TAG:
return AddDescriptorToIsomOD((GF_IsomObjectDescriptor *)parentDesc, newDesc);
case GF_ODF_IPMP_TL_TAG:
if (newDesc->tag != GF_ODF_IPMP_TOOL_TAG) return GF_BAD_PARAM;
return gf_list_add(((GF_IPMP_ToolList *)parentDesc)->ipmp_tools, newDesc);
case GF_ODF_BIFS_CFG_TAG:
{
GF_BIFSConfig *cfg = (GF_BIFSConfig *)parentDesc;
if (newDesc->tag != GF_ODF_ELEM_MASK_TAG) return GF_BAD_PARAM;
if (!cfg->elementaryMasks) cfg->elementaryMasks = gf_list_new();
return gf_list_add(cfg->elementaryMasks, newDesc);
}
default:
return GF_ODF_FORBIDDEN_DESCRIPTOR;
}
}
