public static RiffChunk Parse(BinaryReader reader)
{
var chunk = new RiffChunk
{
ChunkId = Utils.ReadUTF8String(reader, 4),
Size = reader.ReadInt32(),
Type = Utils.ReadUTF8String(reader, 4)
};
if (chunk.ChunkId != "RIFF")
{
throw new InvalidDataException("Not a valid RIFF file");
}
return(chunk);
}
public void ParseRiff(Stream file)
{
using (BinaryReader reader = new BinaryReader(file))
{
RiffChunk = RiffChunk.Parse(reader);
SubChunks.Clear();
// Size is counted from after the ChunkSize field, not the RiffType field
long startOffset = reader.BaseStream.Position - 4;
long endOffset = startOffset + RiffChunk.Size;
// Make sure 8 bytes are available for the subchunk header
while (reader.BaseStream.Position + 8 < endOffset)
{
RiffSubChunk subChunk = ParseSubChunk(reader);
SubChunks[subChunk.SubChunkId] = subChunk;
}
}
}