C++ AP4_AtomParent::AddChild方法代码示例

/*----------------------------------------------------------------------
|   AP4_AtomFactory::CreateAtomsFromStream
+---------------------------------------------------------------------*/
AP4_Result
AP4_AtomFactory::CreateAtomsFromStream(AP4_ByteStream& stream, 
                                       AP4_LargeSize   bytes_available,
                                       AP4_AtomParent& atoms)
{
    AP4_Result result;
    do {
        AP4_Atom* atom = NULL;
        result = CreateAtomFromStream(stream, bytes_available, atom);
        if (AP4_SUCCEEDED(result) && atom != NULL) {
            atoms.AddChild(atom);
        }
    } while (AP4_SUCCEEDED(result));
    
    return AP4_SUCCESS;
}

/*----------------------------------------------------------------------
|   AP4_OmaDcfEncryptingProcessor::Initialize
+---------------------------------------------------------------------*/
AP4_Result
AP4_OmaDcfEncryptingProcessor::Initialize(AP4_AtomParent&                  top_level,
        AP4_ByteStream&                  /*stream*/,
        AP4_Processor::ProgressListener* /*listener*/)
{
    AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
    if (ftyp) {
        // remove the atom, it will be replaced with a new one
        top_level.RemoveChild(ftyp);

        // keep the existing brand and compatible brands
        AP4_Array<AP4_UI32> compatible_brands;
        compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
        for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
            compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
        }

        // add the OMA compatible brand if it is not already there
        if (!ftyp->HasCompatibleBrand(AP4_OMA_DCF_BRAND_OPF2)) {
            compatible_brands.Append(AP4_OMA_DCF_BRAND_OPF2);
        }

        // create a replacement
        AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(ftyp->GetMajorBrand(),
                ftyp->GetMinorVersion(),
                &compatible_brands[0],
                compatible_brands.ItemCount());
        delete ftyp;
        ftyp = new_ftyp;
    } else {
        AP4_UI32 opf2 = AP4_OMA_DCF_BRAND_OPF2;
        ftyp = new AP4_FtypAtom(AP4_FTYP_BRAND_ISOM, 0, &opf2, 1);
    }

    // insert the ftyp atom as the first child
    return top_level.AddChild(ftyp, 0);
}

/*----------------------------------------------------------------------
|   AP4_MarlinIpmpEncryptingProcessor::Initialize
+---------------------------------------------------------------------*/
AP4_Result 
AP4_MarlinIpmpEncryptingProcessor::Initialize(
    AP4_AtomParent&                  top_level,
    AP4_ByteStream&                  /*stream*/,
    AP4_Processor::ProgressListener* /*listener = NULL*/)
{
    // get the moov atom
    AP4_MoovAtom* moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, top_level.GetChild(AP4_ATOM_TYPE_MOOV));
    if (moov == NULL) return AP4_ERROR_INVALID_FORMAT;
    
    // deal with the file type
    AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
    if (ftyp) {
        // remove the atom, it will be replaced with a new one
        top_level.RemoveChild(ftyp);
        
        // keep the existing brand and compatible brands
        AP4_Array<AP4_UI32> compatible_brands;
        compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
        for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
            compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
        }
        
        // add the MGSV compatible brand if it is not already there
        if (!ftyp->HasCompatibleBrand(AP4_MARLIN_BRAND_MGSV)) {
            compatible_brands.Append(AP4_MARLIN_BRAND_MGSV);
        }

        // create a replacement for the major brand
        AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV,
                                                  0x13c078c, //AP4_MARLIN_BRAND_MGSV_MAJOR_VERSION,
                                                  &compatible_brands[0],
                                                  compatible_brands.ItemCount());
        delete ftyp;
        ftyp = new_ftyp;
    } else {
        AP4_UI32 isom = AP4_FTYP_BRAND_ISOM;
        ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV, 0, &isom, 1);
    }
    
    // insert the ftyp atom as the first child
    top_level.AddChild(ftyp, 0);

    // create and 'mpod' track reference atom
    AP4_TrefTypeAtom* mpod = new AP4_TrefTypeAtom(AP4_ATOM_TYPE_MPOD);
    
    // look for an available track ID, starting at 1
    unsigned int od_track_id       = 0;
    unsigned int od_track_position = 0;
    AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
    while (trak_item) {
        AP4_TrakAtom* trak = trak_item->GetData();
        if (trak) {
            od_track_position++;
            if (trak->GetId() >= od_track_id) {
                od_track_id = trak->GetId()+1;
            }
            
            // if the track is encrypted, reference it in the mpod
            if (m_KeyMap.GetKey(trak->GetId())) {
                mpod->AddTrackId(trak->GetId());
            }
            
            //m_SinfEntries.Add(new SinfEntry(trak->GetId(), NULL));
        }
        trak_item = trak_item->GetNext();
    }
    
    // check that there was at least one track in the file
    if (od_track_id == 0) return AP4_ERROR_INVALID_FORMAT;
    
    // create an initial object descriptor
    AP4_InitialObjectDescriptor* iod = 
        // FIXME: get real values from the property map
        new AP4_InitialObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_IOD,
                                        1022, // object descriptor id
                                        false, 
                                        0xFE,    // OD profile level (0xFE = No OD profile specified)
                                        0xFF,    // scene profile level
                                        0xFE,    // audio profile level
                                        0xFE,    // visual profile level
                                        0xFF);   // graphics profile

    // create an ES_ID_Inc subdescriptor and add it to the initial object descriptor
    AP4_EsIdIncDescriptor* es_id_inc = new AP4_EsIdIncDescriptor(od_track_id);
    iod->AddSubDescriptor(es_id_inc);
    
    // create an iods atom to hold the initial object descriptor
    AP4_IodsAtom* iods = new AP4_IodsAtom(iod);
    
    // add the iods atom to the moov atom (try to put it just after mvhd)
    int iods_position = 0;
    int item_position = 0;
    for (AP4_List<AP4_Atom>::Item* item = moov->GetChildren().FirstItem();
         item;
         ++item) {
         ++item_position;
//.........这里部分代码省略.........

/*----------------------------------------------------------------------
|   AP4_MarlinIpmpEncryptingProcessor::Initialize
+---------------------------------------------------------------------*/
AP4_Result 
AP4_MarlinIpmpEncryptingProcessor::Initialize(
    AP4_AtomParent&                  top_level,
    AP4_ByteStream&                  /*stream*/,
    AP4_Processor::ProgressListener* /*listener = NULL*/)
{
    // get the moov atom
    AP4_MoovAtom* moov = AP4_DYNAMIC_CAST(AP4_MoovAtom, top_level.GetChild(AP4_ATOM_TYPE_MOOV));
    if (moov == NULL) return AP4_ERROR_INVALID_FORMAT;
    
    // deal with the file type
    AP4_FtypAtom* ftyp = AP4_DYNAMIC_CAST(AP4_FtypAtom, top_level.GetChild(AP4_ATOM_TYPE_FTYP));
    if (ftyp) {
        // remove the atom, it will be replaced with a new one
        top_level.RemoveChild(ftyp);
        
        // keep the existing brand and compatible brands
        AP4_Array<AP4_UI32> compatible_brands;
        compatible_brands.EnsureCapacity(ftyp->GetCompatibleBrands().ItemCount()+1);
        for (unsigned int i=0; i<ftyp->GetCompatibleBrands().ItemCount(); i++) {
            compatible_brands.Append(ftyp->GetCompatibleBrands()[i]);
        }
        
        // add the MGSV compatible brand if it is not already there
        if (!ftyp->HasCompatibleBrand(AP4_MARLIN_BRAND_MGSV)) {
            compatible_brands.Append(AP4_MARLIN_BRAND_MGSV);
        }

        // create a replacement for the major brand
        AP4_FtypAtom* new_ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV,
                                                  0x13c078c, //AP4_MARLIN_BRAND_MGSV_MAJOR_VERSION,
                                                  &compatible_brands[0],
                                                  compatible_brands.ItemCount());
        delete ftyp;
        ftyp = new_ftyp;
    } else {
        AP4_UI32 isom = AP4_FTYP_BRAND_ISOM;
        ftyp = new AP4_FtypAtom(AP4_MARLIN_BRAND_MGSV, 0, &isom, 1);
    }
    
    // insert the ftyp atom as the first child
    top_level.AddChild(ftyp, 0);

    // create and 'mpod' track reference atom
    AP4_TrefTypeAtom* mpod = new AP4_TrefTypeAtom(AP4_ATOM_TYPE_MPOD);
    
    // look for an available track ID, starting at 1
    unsigned int od_track_id       = 0;
    unsigned int od_track_position = 0;
    for (AP4_List<AP4_TrakAtom>::Item* trak_item = moov->GetTrakAtoms().FirstItem();
                                       trak_item;
                                       trak_item = trak_item->GetNext()) {
        AP4_TrakAtom* trak = trak_item->GetData();
        if (trak) {
            od_track_position++;
            if (trak->GetId() >= od_track_id) {
                od_track_id = trak->GetId()+1;
            }
            
            // if the track is encrypted, reference it in the mpod
            if (m_KeyMap.GetKey(trak->GetId())) {
                mpod->AddTrackId(trak->GetId());
            }
            
            //m_SinfEntries.Add(new SinfEntry(trak->GetId(), NULL));
        }   
    }
    
    // check that there was at least one track in the file
    if (od_track_id == 0) return AP4_ERROR_INVALID_FORMAT;
    
    // create an initial object descriptor
    AP4_InitialObjectDescriptor* iod = 
        // FIXME: get real values from the property map
        new AP4_InitialObjectDescriptor(AP4_DESCRIPTOR_TAG_MP4_IOD,
                                        1022, // object descriptor id
                                        false, 
                                        0xFE,    // OD profile level (0xFE = No OD profile specified)
                                        0xFF,    // scene profile level
                                        0xFE,    // audio profile level
                                        0xFE,    // visual profile level
                                        0xFF);   // graphics profile

    // create an ES_ID_Inc subdescriptor and add it to the initial object descriptor
    AP4_EsIdIncDescriptor* es_id_inc = new AP4_EsIdIncDescriptor(od_track_id);
    iod->AddSubDescriptor(es_id_inc);
    
    // create an iods atom to hold the initial object descriptor
    AP4_IodsAtom* iods = new AP4_IodsAtom(iod);
    
    // add the iods atom to the moov atom (try to put it just after mvhd)
    int iods_position = 0;
    int item_position = 0;
    for (AP4_List<AP4_Atom>::Item* moov_item = moov->GetChildren().FirstItem();
                                   moov_item;
                                   moov_item = moov_item->GetNext()) {
         ++item_position;
//.........这里部分代码省略.........