private byte[] MakeOldIndexChunk()
{
const uint AVIIF_KEYFRAME = 0x10;
List <List <StreamChunkInfo> > cilList = new List <List <StreamChunkInfo> >();
List <int> cilIndex = new List <int>();
List <int> cilLength = new List <int>();
List <uint> cilFourCC = new List <uint>();
AVIOLDINDEXENTRY entry;
byte[] buff;
int i, entryCount, buffPos, u;
entryCount = 0;
for (i = 0; i < _streamList.Count; i++)
{
AVIStream s = _streamList[i];
if (s.ChunkList.Count > 0)
{
cilList.Add(s.ChunkList);
cilIndex.Add(0);
cilLength.Add(s.ChunksInFirstMOVI);
cilFourCC.Add(s.FourCC);
entryCount += s.ChunksInFirstMOVI;
}
}
buffPos = 0;
buff = new byte[entryCount * 16];
while (entryCount > 0)
{
// Find the chunk with the lowest offset
u = 0;
for (i = 1; i < cilList.Count; i++)
{
if (cilList[i][cilIndex[i]].Offset < cilList[u][cilIndex[u]].Offset)
{
u = i;
}
}
entry.dwChunkID = cilFourCC[u];
entry.dwFlags = cilList[u][cilIndex[u]].IsKeyFrame ? AVIIF_KEYFRAME : 0;
entry.dwOffset = (uint)(cilList[u][cilIndex[u]].Offset - (_moviOffset + 8));
entry.dwSize = cilList[u][cilIndex[u]].Size;
BitConverterLE.WriteBytes(entry.dwChunkID, buff, buffPos);
BitConverterLE.WriteBytes(entry.dwFlags, buff, buffPos + 4);
BitConverterLE.WriteBytes(entry.dwOffset, buff, buffPos + 8);
BitConverterLE.WriteBytes(entry.dwSize, buff, buffPos + 12);
buffPos += 16;
// If all the chunks from this stream have been written in the index,
// stop checking this stream
cilIndex[u]++;
if (cilIndex[u] >= cilLength[u])
{
cilList.RemoveAt(u);
cilIndex.RemoveAt(u);
cilLength.RemoveAt(u);
cilFourCC.RemoveAt(u);
}
entryCount--;
}
return(buff);
}
public static uint FourCC(string fourCC)
{
byte[] bytes = Encoding.ASCII.GetBytes(fourCC);
return((bytes.Length == 4) ? BitConverterLE.ToUInt32(bytes, 0) : 0x20202020);
}
private byte[] MakeDMLHChunk(uint dwTotalFrames)
{
byte[] buff = new byte[248];
BitConverterLE.WriteBytes(dwTotalFrames, buff, 0);
return(buff);
}