internal long AssignOffset(JP2TilePart tp)
{
bool rc = _nextUnboundTilepartIdx < _tileparts.Count;
rc = rc && tp == _tileparts[_nextUnboundTilepartIdx];
if (!rc)
{
throw new InvalidOperationException(String.Concat(
"Must add the tile-part to the codestream before assigning",
" offsets. Call FlushHeaders in the same order that the ",
" tile-parts were inserted into the codestream"));
}
long tpOffset = FirstChildOffset;
if (_nextUnboundTilepartIdx > 0)
{
int prevIdx = _nextUnboundTilepartIdx - 1;
var prev = _tileparts[prevIdx];
tpOffset = prev.Position - Position;
tpOffset += prev.Length;
if (prev.Length <= 0)
{
throw new InvalidOperationException(string.Format(
"tilepart at position {0}, was not sealed", prevIdx));
}
}
_nextUnboundTilepartIdx++;
return(tpOffset);
}
/// <summary>
/// Creates a new tile-part instance and adds it to
/// an ordered list of tile-parts that compose this codestream.
/// </summary>
/// <param name="tileIdx">
/// The tile index that the tile-part belongs to
/// </param>
/// <param name="isLastInTile">
/// True if this should be the last tile-part
/// for this tile. Needed for the TNsot field in the
/// SOT marker.
/// </param>
/// <returns>
/// A tile-part instance which is added to this codestream.
/// </returns>
public JP2TilePart CreateTilePart(ushort tileIdx, bool isLastInTile)
{
if (IsFlushed)
{
throw new InvalidOperationException(String.Concat(
"Cannot add tile-parts to a codestream that ",
"has already been flushed to the underlying IO ",
"stream. You should call Flush only after you have ",
"added all tile-parts and all packets"));
}
if (!IsOpened)
{
throw new InvalidOperationException(String.Concat(
"Cannot add tile-parts to a codestream that has ",
"been closed. You can add tile-parts only to a ",
"codestream which has been newly created"));
}
byte tpIdx = Tiles[tileIdx].TilePartCount;
JP2TilePart tp = new JP2TilePart(this, tileIdx, tpIdx, true);
Tiles[tileIdx].Add(tp, isLastInTile);
_tileparts.Add(tp);
AddToTlm(tp);
return(tp);
}
private long AddTilePart(long offset, ushort tileIdx, long tpLength)
{
var tp = new JP2TilePart(this, offset, tpLength);
Tiles[tileIdx].Add(tp, false);
_tileparts.Add(tp);
offset += tpLength;
return(offset);
}
/// <summary>
/// Bulk transfer of source tile-part content to destination tile-part.
/// </summary>
/// <param name="dst">Destination tile-part</param>
/// <param name="dstOffset">
/// Offset in the destination tile-part in bytes from the start of the FirstChildOffset
/// </param>
/// <param name="src">Source tile-part</param>
/// <param name="startPacket">inclusive index</param>
/// <param name="endPacket">exclusive index</param>
/// <param name="buffer">optional buffer</param>
/// <returns>The number of bytes transferred</returns>
public static uint BulkTransferData(
JP2TilePart dst,
uint dstOffset,
JP2TilePart src,
int startPacket,
int packetCount,
byte[] buffer = null)
{
if (!dst.IsFlushed)
{
throw new InvalidOperationException(String.Concat(
"trying to transfer data between IO streams ",
"without sealing the destination tile-part to ",
"further addition of packets. ",
"Must call to JP2TilePart.Flush()"));
}
if (!dst.IsOpened || !src.IsOpened)
{
throw new InvalidOperationException(String.Concat(
"Trying to transfer data between unopened ",
"tile-parts. Call OpenTilePart on the source ",
"or destination codestreams"));
}
if (buffer == null)
{
buffer = new byte[1 << 16];
}
int endPacket = startPacket + packetCount;
uint srcOffset = src._packetOffsets[startPacket];
uint endOffset = src._packetOffsets[endPacket];
uint dataCount = endOffset - srcOffset;
// make it signed integer for bounds checking
long left = dataCount;
long srcPos = src.Position + src.FirstChildOffset + srcOffset;
long dstPos = dst.Position + dst.FirstChildOffset + dstOffset;
src.UnderlyingIO.Seek(srcPos, SeekOrigin.Begin);
dst.UnderlyingIO.Seek(dstPos, SeekOrigin.Begin);
while (left > 0)
{
// a tile-part can theoretically have 2^32 bytes but a byte
// buffer is limited to Int32.MaxValue which is only 2^31 - 1.
long countL = Math.Min(buffer.Length, left);
int count = (int)countL;
src.UnderlyingIO.Read(buffer, 0, count);
dst.UnderlyingIO.Write(buffer, 0, count);
left -= count;
}
return(dataCount);
}
private void AddToTlm(JP2TilePart tp)
{
TlmMarker tlm = _tlmMarkers.Last();
if (tlm.IsFull)
{
if (_tlmMarkers.Count >= TlmMarker.MaxMarkers)
{
throw new InvalidOperationException(String.Concat(
"Cannot add more tile-parts, Exceeded the ",
"limit of TLM markers in codestream"));
}
_tlmMarkers.Add(new TlmMarker((byte)_tlmMarkers.Count));
tlm = _tlmMarkers.Last();
}
tlm.Add(tp);
}
internal void Add(JP2TilePart tilePart, bool isLast)
{
if (_isSealed)
{
throw new InvalidOperationException(
"this tile has been sealed, tileIdx: " + TileIndex);
}
if (_tileParts.Count() > MAX_TILEPARTS)
{
throw new InvalidOperationException(
"Tile-parts limit per tile has been reached");
}
if (isLast)
{
tilePart.TilePartCount = (byte)(_tileParts.Count + 1);
}
_tileParts.Add(tilePart);
_packetCounts.Add(PACKET_COUNT_NOT_SET);
}
internal JP2Packet(JP2TilePart parent, long offset, long length)
: base(parent, offset, length)
{
}