C++ (Cpp) mxf_get_min_llenの例

コード例 #1

ファイル: mxf_partition.c プロジェクト: Limecraft/ebu-libmxf

int mxf_fill_to_position(MXFFile *mxfFile, uint64_t position)
{
    int64_t filePos;
    uint64_t fillSize;
    uint8_t llen;

    CHK_ORET((filePos = mxf_file_tell(mxfFile)) >= 0);

    if ((uint64_t)filePos == position)
    {
        return 1;
    }

    CHK_ORET(((uint64_t)filePos <= position - mxf_get_min_llen(mxfFile) + mxfKey_extlen));

    CHK_ORET(mxf_write_k(mxfFile, &g_KLVFill_key));

    fillSize = position - filePos - mxfKey_extlen;
    llen = mxf_get_llen(mxfFile, fillSize);
    assert(fillSize >= llen);
    fillSize -= llen;

    CHK_ORET(mxf_write_l(mxfFile, fillSize));
    CHK_ORET(mxf_write_zeros(mxfFile, fillSize));

    return 1;
}

コード例 #2

ファイル: mxf_header_metadata.c プロジェクト: UIKit0/bbc-ingex

/* note: keep in sync with mxf_get_set_len */
int mxf_write_set(MXFFile* mxfFile, MXFMetadataSet* set)
{
    MXFListIterator iter;
    uint64_t setLen = 0;
    uint64_t setSize = 0;
    
    mxf_initialise_list_iter(&iter, &set->items);
    while (mxf_next_list_iter_element(&iter))
    {
        setLen += ((MXFMetadataItem*)mxf_get_iter_element(&iter))->length + 4;
    }
 
    if (mxf_get_llen(mxfFile, setLen) <= 4)
    {
        /* spec says preferred 4-byte BER encoded len for sets */ 
        CHK_ORET(mxf_write_fixed_kl(mxfFile, &set->key, 4, setLen));
        setSize = mxfKey_extlen + 4 + setLen;
    }
    else
    {
        CHK_ORET(mxf_write_kl(mxfFile, &set->key, setLen));
        setSize = mxfKey_extlen + mxf_get_llen(mxfFile, setLen) + setLen;
    }
    
    mxf_initialise_list_iter(&iter, &set->items);
    while (mxf_next_list_iter_element(&iter))
    {
        CHK_ORET(mxf_write_item(mxfFile, (MXFMetadataItem*)mxf_get_iter_element(&iter)));
    }
    
    if (set->fixedSpaceAllocation > 0)
    {
        /* check that we can achieve the fixed size, possibly using a filler */
        CHK_ORET(setSize == set->fixedSpaceAllocation || 
            (setSize < set->fixedSpaceAllocation && 
                setSize + mxf_get_min_llen(mxfFile) + mxfKey_extlen <= set->fixedSpaceAllocation));
            
        if (setSize < set->fixedSpaceAllocation)
        {
            /* add filler */
            CHK_ORET(mxf_write_fill(mxfFile, (uint32_t)(set->fixedSpaceAllocation - setSize)));
        }
    }
    
    return 1;
}

コード例 #3

ファイル: mxf_partition.c プロジェクト: Limecraft/ebu-libmxf

int mxf_allocate_space(MXFFile *mxfFile, uint32_t size)
{
    uint64_t fillSize;
    uint8_t llen;

    CHK_ORET(size >= (uint32_t)(mxf_get_min_llen(mxfFile) + mxfKey_extlen));

    CHK_ORET(mxf_write_k(mxfFile, &g_KLVFill_key));

    fillSize = size - mxfKey_extlen;
    llen = mxf_get_llen(mxfFile, fillSize);
    assert(fillSize >= llen);
    fillSize -= llen;

    CHK_ORET(mxf_write_l(mxfFile, fillSize));
    CHK_ORET(mxf_write_zeros(mxfFile, fillSize));

    return 1;
}