public T GetSubChunk <T>(string id) where T : RiffSubChunk
{
RiffSubChunk chunk;
SubChunks.TryGetValue(id, out chunk);
return(chunk as T);
}
protected override uint LoadChunk(uint length, BinaryReader br)
{
var initialOffset = br.BaseStream.Position;
ushort subChunkCount = br.ReadUInt16();
Delay = br.ReadUInt16();
br.ReadUInt16();
Width = br.ReadUInt16();
Height = br.ReadUInt16();
for (int i = 0; i < subChunkCount; i++)
{
SubChunks.Add(Load(br, _videoWidth, _videoHeight));
}
ApiUtil.Assert(br.BaseStream.Position == initialOffset + length);
return(length);
}
public void ParseRiff(Stream file)
{
using (BinaryReader reader = GetBinaryReader(file, Endianness.LittleEndian))
{
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;
}
}
}
protected override uint LoadChunk(uint length, ISerializer s)
{
if (s == null)
{
throw new ArgumentNullException(nameof(s));
}
var initialOffset = s.Offset;
ushort subChunkCount = s.UInt16(null, 0);
Delay = s.UInt16(null, 0);
s.UInt16(null, 0);
Width = s.UInt16(null, 0);
Height = s.UInt16(null, 0);
for (int i = 0; i < subChunkCount; i++)
{
SubChunks.Add(Load(s, _videoWidth, _videoHeight));
}
ApiUtil.Assert(s.Offset == initialOffset + length);
return(length);
}