/// <summary>
/// Initializes a new instance of the <see cref="AvifReader"/> class.
/// </summary>
/// <param name="parser">The parser.</param>
/// <exception cref="ArgumentNullException"><paramref name="input"/> is null.</exception>
public AvifReader(Stream input, bool leaveOpen, IByteArrayPool arrayPool)
{
if (input is null)
{
ExceptionUtil.ThrowArgumentNullException(nameof(input));
}
// The parser is initialized first because it will throw an exception
// if the AVIF file is invalid or not supported.
this.parser = new AvifParser(input, leaveOpen, arrayPool);
this.primaryItemId = this.parser.GetPrimaryItemId();
this.alphaItemId = this.parser.GetAlphaItemId(this.primaryItemId);
this.colorInfoBox = this.parser.TryGetColorInfoBox(this.primaryItemId);
this.parser.GetTransformationProperties(this.primaryItemId,
out this.cleanApertureBox,
out this.imageRotateBox,
out this.imageMirrorBox);
this.colorGridInfo = this.parser.TryGetImageGridInfo(this.primaryItemId);
if (this.alphaItemId != 0)
{
this.alphaGridInfo = this.parser.TryGetImageGridInfo(this.alphaItemId);
}
else
{
this.alphaGridInfo = null;
}
}
public AvifWriter(IReadOnlyList <CompressedAV1Image> colorImages,
IReadOnlyList <CompressedAV1Image> alphaImages,
AvifMetadata metadata,
ImageGridMetadata imageGridMetadata,
YUVChromaSubsampling chromaSubsampling,
ColorInformationBox colorInformationBox,
ProgressEventHandler progressEventHandler,
uint progressDone,
uint progressTotal,
IByteArrayPool arrayPool)
{
this.state = new AvifWriterState(colorImages, alphaImages, imageGridMetadata, metadata, arrayPool);
this.arrayPool = arrayPool;
this.colorImageIsGrayscale = chromaSubsampling == YUVChromaSubsampling.Subsampling400;
this.colorInformationBox = colorInformationBox;
this.progressCallback = progressEventHandler;
this.progressDone = progressDone;
this.progressTotal = progressTotal;
this.fileTypeBox = new FileTypeBox(chromaSubsampling);
this.metaBox = new MetaBox(this.state.PrimaryItemId,
this.state.Items.Count,
this.state.MediaDataBoxContentSize > uint.MaxValue,
this.state.ItemDataBox);
PopulateMetaBox();
}
