private void WriteStreamName(IAviStream stream)
{
if (!string.IsNullOrEmpty(stream.Name))
{
var bytes = Encoding.ASCII.GetBytes(stream.Name);
var chunk = fileWriter.OpenChunk(KnownFourCCs.Chunks.StreamName);
fileWriter.Write(bytes);
fileWriter.Write((byte)0);
fileWriter.CloseItem(chunk);
}
}
private void WriteStreamSuperIndex(IAviStream stream)
{
var superIndex = streamsInfo[stream.Index].SuperIndex;
// See AVISUPERINDEX structure
var chunk = fileWriter.OpenChunk(KnownFourCCs.Chunks.StreamIndex);
fileWriter.Write((ushort)4); // DWORDs per entry
fileWriter.Write((byte)0); // index sub-type
fileWriter.Write((byte)IndexType.Indexes); // index type
fileWriter.Write((uint)superIndex.Count); // entries count
fileWriter.Write((uint)((IAviStreamInternal)stream).ChunkId); // chunk ID of the stream
fileWriter.SkipBytes(3 * sizeof(uint)); // reserved
// entries
foreach (var entry in superIndex)
{
fileWriter.Write((ulong)entry.ChunkOffset); // offset of sub-index chunk
fileWriter.Write((uint)entry.ChunkSize); // size of sub-index chunk
fileWriter.Write((uint)entry.Duration); // duration of sub-index data (number of frames it refers to)
}
fileWriter.CloseItem(chunk);
}
