private void WriteStreamFormat(IAviStreamInternal stream)
{
var chunk = fileWriter.OpenChunk(KnownFourCCs.Chunks.StreamFormat);
stream.WriteFormat();
fileWriter.CloseItem(chunk);
}
private void WriteStreamHeader(IAviStreamInternal stream)
{
var chunk = fileWriter.OpenChunk(KnownFourCC.Chunks.StreamHeader);
stream.WriteHeader();
fileWriter.CloseItem(chunk);
}
private void WriteStreamList(IAviStreamInternal stream)
{
var list = fileWriter.OpenList(KnownFourCCs.Lists.Stream);
WriteStreamHeader(stream);
WriteStreamFormat(stream);
WriteStreamName(stream);
WriteStreamSuperIndex(stream);
fileWriter.CloseItem(list);
}
private void FlushStreamIndex(IAviStreamInternal stream)
{
var si = streamsInfo[stream.Index];
var index = si.StandardIndex;
var entriesCount = index.Count;
if (entriesCount == 0)
{
return;
}
var baseOffset = index[0].DataOffset;
var indexSize = 24 + entriesCount * 8;
CreateNewRiffIfNeeded(indexSize);
// See AVISTDINDEX structure
var chunk = fileWriter.OpenChunk(si.StandardIndexChunkId, indexSize);
fileWriter.Write((ushort)2); // DWORDs per entry
fileWriter.Write((byte)0); // index sub-type
fileWriter.Write((byte)IndexType.Chunks); // index type
fileWriter.Write((uint)entriesCount); // entries count
fileWriter.Write((uint)stream.ChunkId); // chunk ID of the stream
fileWriter.Write((ulong)baseOffset); // base offset for entries
fileWriter.SkipBytes(sizeof(uint)); // reserved
foreach (var entry in index)
{
fileWriter.Write((uint)(entry.DataOffset - baseOffset)); // chunk data offset
fileWriter.Write(entry.DataSize); // chunk data size
}
fileWriter.CloseItem(chunk);
var superIndex = streamsInfo[stream.Index].SuperIndex;
var newEntry = new SuperIndexEntry
{
ChunkOffset = chunk.ItemStart,
ChunkSize = chunk.ItemSize,
Duration = entriesCount
};
superIndex.Add(newEntry);
index.Clear();
}
