/// <summary>
/// Reads format specific information at the start of the
/// file.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value containing the seek position
/// at which the tags end and the media data begins.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
protected override void ReadStart(long start,
ReadStyle propertiesStyle)
{
long end;
IList<Block> blocks = ReadBlocks (ref start, out end,
BlockMode.Whitelist, BlockType.StreamInfo,
BlockType.XiphComment, BlockType.Picture);
metadata = new Metadata (blocks);
TagTypesOnDisk |= metadata.TagTypes;
if (propertiesStyle != ReadStyle.None) {
// Check that the first block is a
// METADATA_BLOCK_STREAMINFO.
if (blocks.Count == 0 ||
blocks [0].Type != BlockType.StreamInfo)
throw new CorruptFileException (
"FLAC stream does not begin with StreamInfo.");
// The stream exists from the end of the last
// block to the end of the file.
stream_start = end;
header_block = blocks [0].Data;
}
}
protected override void ReadStart(long start, ReadStyle propertiesStyle)
{
long num;
BlockType[] types = new BlockType[3];
types[1] = BlockType.XiphComment;
types[2] = BlockType.Picture;
IList<Block> blocks = this.ReadBlocks(ref start, out num, BlockMode.Whitelist, types);
this.metadata = new Metadata(blocks);
base.TagTypesOnDisk |= this.metadata.TagTypes;
if (propertiesStyle != ReadStyle.None)
{
if ((blocks.Count == 0) || (blocks[0].Type != BlockType.StreamInfo))
{
throw new CorruptFileException("FLAC stream does not begin with StreamInfo.");
}
this.stream_start = num;
this.header_block = blocks[0].Data;
}
}