private byte[] MakeOpenDMLStandardIndexChunk(List <StreamChunkInfo> chunkList, int start, int length, uint streamFourCC)
{
const byte AVI_INDEX_OF_CHUNKS = 0x01;
long baseOffset = chunkList[start].Offset + 8;
AVISTDINDEX header = new AVISTDINDEX();
AVISTDINDEXENTRY entry;
byte[] buff = new byte[OpenDMLStandardIndexSize((uint)length)];
int buffPos = 0;
header.wLongsPerEntry = 2;
header.bIndexSubType = 0;
header.bIndexType = AVI_INDEX_OF_CHUNKS;
header.nEntriesInUse = (uint)length;
header.dwChunkID = streamFourCC;
header.qwBaseOffset = (ulong)baseOffset;
buffPos += StructHelper <AVISTDINDEX> .ToBytes(header, buff, buffPos, false);
for (int i = 0; i < length; i++)
{
StreamChunkInfo c = chunkList[start + i];
entry.dwOffset = (uint)((c.Offset + 8) - baseOffset);
entry.dwSize = c.Size | (c.IsKeyFrame ? 0 : 0x80000000);
BitConverterLE.WriteBytes(entry.dwOffset, buff, buffPos);
BitConverterLE.WriteBytes(entry.dwSize, buff, buffPos + 4);
buffPos += 8;
}
return(buff);
}
private void MakeOpenDMLIndexes()
{
for (int iStream = 0; iStream < _streamList.Count; iStream++)
{
const byte AVI_INDEX_OF_INDEXES = 0x00;
AVIStream stream = _streamList[iStream];
List <StreamChunkInfo> chunkList = stream.ChunkList;
AVISUPERINDEX header = new AVISUPERINDEX();
AVISUPERINDEXENTRY entry;
int entriesPerChunk, entryOffset, chunksLeft, buffPos;
uint indexChunkID = AVIHelper.StreamFourCC(AVIHelper.StreamID(stream.FourCC, false), "ix", true);
byte[] buff;
buffPos = 0;
buff = new byte[OpenDMLSuperIndexSize(MaxOpenDMLSuperIndexEntries)];
entriesPerChunk = (int)CalculateOpenDMLStandardIndexEntryCount(chunkList);
entryOffset = 0;
chunksLeft = chunkList.Count;
header.wLongsPerEntry = 4;
header.bIndexSubType = 0;
header.bIndexType = AVI_INDEX_OF_INDEXES;
header.nEntriesInUse = (uint)((chunksLeft + (entriesPerChunk - 1)) / entriesPerChunk);
header.dwChunkID = stream.FourCC;
if (header.nEntriesInUse > MaxOpenDMLSuperIndexEntries)
{
throw new Exception("Too many super-index entries.");
}
buffPos += StructHelper <AVISUPERINDEX> .ToBytes(header, buff, buffPos, false);
while (chunksLeft > 0)
{
int length = Math.Min(entriesPerChunk, chunksLeft);
byte[] tmp = MakeOpenDMLStandardIndexChunk(chunkList, entryOffset, length,
stream.FourCC);
CheckExtend((uint)tmp.Length);
entry.qwOffset = (ulong)WriteChunk(indexChunkID, tmp);
entry.dwSize = (uint)tmp.Length + 8;
entry.dwDuration = (stream.Type == AVIStreamType.Video) ? (uint)length :
CalculateDuration(chunkList, entryOffset, length);
BitConverterLE.WriteBytes(entry.qwOffset, buff, buffPos);
BitConverterLE.WriteBytes(entry.dwSize, buff, buffPos + 8);
BitConverterLE.WriteBytes(entry.dwDuration, buff, buffPos + 12);
buffPos += 16;
entryOffset += length;
chunksLeft -= length;
}
stream.OpenDMLSuperIndex = buff;
}
}
public static string FourCC(uint fourCC)
{
byte[] bytes = new byte[4];
string s;
BitConverterLE.WriteBytes(fourCC, bytes, 0);
s = Encoding.ASCII.GetString(bytes).Replace('\0', ' ');
return((s.Length == 4) ? s : new string(' ', 4));
}
private void FinalizeLists()
{
byte[] hdr = new byte[4];
foreach (ListInfo li in _closedLists)
{
Seek(li.Offset + 4);
BitConverterLE.WriteBytes(li.Size, hdr, 0);
_fs.Write(hdr, 0, 4);
}
_fileOffset += 4;
}
private long StartList(string chunkID, string listType)
{
long offset = _fileOffset;
byte[] hdr = new byte[12];
_openLists.Push(offset);
BitConverterLE.WriteBytes(AVIHelper.FourCC(chunkID), hdr, 0);
BitConverterLE.WriteBytes((uint)0, hdr, 4);
BitConverterLE.WriteBytes(AVIHelper.FourCC(listType), hdr, 8);
_fs.Write(hdr, 0, 12);
_fileOffset += 12;
return(offset);
}
private long WriteChunk(uint chunkID, byte[] data)
{
long offset = _fileOffset;
byte[] hdr = new byte[8];
uint len = (uint)data.Length;
BitConverterLE.WriteBytes(chunkID, hdr, 0);
BitConverterLE.WriteBytes(len, hdr, 4);
_fs.Write(hdr, 0, 8);
_fs.Write(data, 0, (int)len);
_fileOffset += (long)len + 8;
if ((len & 1) != 0)
{
_fs.WriteByte(0);
_fileOffset += 1;
}
return(offset);
}
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);
}
private byte[] MakeDMLHChunk(uint dwTotalFrames)
{
byte[] buff = new byte[248];
BitConverterLE.WriteBytes(dwTotalFrames, buff, 0);
return(buff);
}
