private static int GetItemCount(IReadOnlyList <CompressedAV1Image> colorImages, IReadOnlyList <CompressedAV1Image> alphaImages, AvifMetadata metadata)
{
int count;
if (colorImages.Count == 1)
{
count = 1;
}
else
{
// Add one item for the grid image.
count = 1 + colorImages.Count;
}
if (alphaImages != null)
{
// The color and alpha lists will always have the same number of images.
count *= 2;
}
byte[] exif = metadata.GetExifBytesReadOnly();
if (exif != null && exif.Length > 0)
{
count++;
}
byte[] xmp = metadata.GetXmpBytesReadOnly();
if (xmp != null && xmp.Length > 0)
{
count++;
}
return(count);
}
private void Initialize(IReadOnlyList <CompressedAV1Image> colorImages,
IReadOnlyList <CompressedAV1Image> alphaImages,
ImageGridMetadata imageGridMetadata,
AvifMetadata metadata,
IByteArrayPool arrayPool)
{
ImageStateInfo result;
if (imageGridMetadata != null)
{
result = InitializeFromImageGrid(colorImages, alphaImages, imageGridMetadata);
this.ItemDataBox = CreateItemDataBox(imageGridMetadata, arrayPool);
}
else
{
result = InitializeFromSingleImage(colorImages[0], alphaImages?[0]);
this.ItemDataBox = null;
}
uint itemId = result.NextId;
ulong mediaDataBoxContentSize = result.MediaDataBoxContentSize;
byte[] exif = metadata.GetExifBytesReadOnly();
if (exif != null && exif.Length > 0)
{
AvifWriterItem exifItem = AvifWriterItem.CreateFromExif(itemId, exif);
itemId++;
exifItem.ItemReferences.Add(new ItemReferenceEntryBox(exifItem.Id, ReferenceTypes.ContentDescription, this.PrimaryItemId));
this.items.Add(exifItem);
mediaDataBoxContentSize += (ulong)exifItem.ContentBytes.Length;
}
byte[] xmp = metadata.GetXmpBytesReadOnly();
if (xmp != null && xmp.Length > 0)
{
AvifWriterItem xmpItem = AvifWriterItem.CreateFromXmp(itemId, xmp);
xmpItem.ItemReferences.Add(new ItemReferenceEntryBox(xmpItem.Id, ReferenceTypes.ContentDescription, this.PrimaryItemId));
this.items.Add(xmpItem);
mediaDataBoxContentSize += (ulong)xmpItem.ContentBytes.Length;
}
this.MediaDataBoxContentSize = mediaDataBoxContentSize;
}