private void WriteStreamFrame(AviStreamBase stream, bool isKeyFrame, byte[] frameData, int startIndex, int count)
{
lock (syncWrite)
{
CheckNotClosed();
if (!startedWriting)
{
PrepareForWriting();
}
var si = streamsInfo[stream.Index];
if (si.SuperIndex.Count == MAX_SUPER_INDEX_ENTRIES)
{
throw new InvalidOperationException("Cannot write more frames to this stream.");
}
if (ShouldFlushStreamIndex(si.StandardIndex))
{
FlushStreamIndex(stream);
}
var shouldCreateIndex1Entry = emitIndex1 && isFirstRiff;
CreateNewRiffIfNeeded(count + (shouldCreateIndex1Entry ? INDEX1_ENTRY_SIZE : 0));
var chunk = fileWriter.OpenChunk(stream.ChunkId, count);
fileWriter.Write(frameData, startIndex, count);
fileWriter.CloseItem(chunk);
si.OnFrameWritten(chunk.DataSize);
var dataSize = (uint)chunk.DataSize;
// Set highest bit for non-key frames according to the OpenDML spec
if (!isKeyFrame)
{
dataSize |= 0x80000000U;
}
var newEntry = new StandardIndexEntry
{
DataOffset = chunk.DataStart,
DataSize = dataSize
};
si.StandardIndex.Add(newEntry);
if (shouldCreateIndex1Entry)
{
var index1Entry = new Index1Entry
{
IsKeyFrame = isKeyFrame,
DataOffset = (uint)(chunk.ItemStart - currentMovie.DataStart),
DataSize = dataSize
};
si.Index1.Add(index1Entry);
index1Count++;
}
}
}
private void WriteStreamFrame(AviStreamBase stream, bool isKeyFrame, ReadOnlySpan <byte> frameData)