286 lines
11 KiB
C#
286 lines
11 KiB
C#
using StreamLibrary.src;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Text;
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namespace StreamLibrary.UnsafeCodecs
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{
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public class UnsafeQuickStream : IUnsafeCodec
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{
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public override ulong CachedSize { get; internal set; }
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public override event IVideoCodec.VideoDebugScanningDelegate onCodeDebugScan;
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public override event IVideoCodec.VideoDebugScanningDelegate onDecodeDebugScan;
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public override int BufferCount
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{
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get { return 0; }
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}
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public override CodecOption CodecOptions
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{
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get { return CodecOption.AutoDispose | CodecOption.RequireSameSize; }
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}
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private PixelFormat EncodedFormat;
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private int EncodedWidth;
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private int EncodedHeight;
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private ulong[] EncodeBuffer;
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private int BlockWidth = 0;
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private int BlockHeight = 0;
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private Bitmap decodedBitmap;
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public List<Rectangle> VerifyPoints = null;
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public Size CheckBlock { get; private set; }
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public UnsafeQuickStream(int ImageQuality = 100)
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: base(ImageQuality)
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{
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this.CheckBlock = new Size(50, 50);//width must be bigger then 3
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}
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public override unsafe void CodeImage(IntPtr Scan0, Rectangle OutputRect, Size InputSize, PixelFormat Format, Stream outStream)
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{
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byte* pScan0 = (byte*)Scan0.ToInt32();
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if (!outStream.CanWrite)
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throw new Exception("Must have access to Write in the Stream");
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int Stride = 0;
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int RawLength = 0;
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int PixelSize = 0;
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switch (Format)
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{
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case PixelFormat.Format24bppRgb:
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PixelSize = 3;
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break;
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case PixelFormat.Format32bppArgb:
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case PixelFormat.Format32bppPArgb:
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PixelSize = 4;
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break;
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default:
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throw new NotSupportedException(Format.ToString());
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}
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Stride = InputSize.Width * PixelSize;
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RawLength = Stride * InputSize.Height;
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if (EncodedWidth == 0 && EncodedHeight == 0)
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{
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this.EncodedFormat = Format;
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this.EncodedWidth = OutputRect.Width;
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this.EncodedHeight = OutputRect.Height;
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byte[] temp = null;
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using (Bitmap TmpBmp = new Bitmap(OutputRect.Width, OutputRect.Height, Stride, Format, Scan0))
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{
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temp = base.jpgCompression.Compress(TmpBmp);
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}
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outStream.Write(BitConverter.GetBytes(temp.Length), 0, 4);
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outStream.Write(temp, 0, temp.Length);
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return;
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}
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List<Rectangle> Points = ProcessChanges(Scan0, OutputRect, Format, InputSize.Width);
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VerifyPoints = Points;
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long oldPos = outStream.Position;
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outStream.Write(new byte[4], 0, 4);
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int TotalDataLength = 0;
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for (int i = 0; i < Points.Count; i++)
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{
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Rectangle rect = Points[i];
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int blockStride = PixelSize * rect.Width;
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Bitmap TmpBmp = new Bitmap(rect.Width, rect.Height, Format);
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BitmapData TmpData = TmpBmp.LockBits(new Rectangle(0, 0, TmpBmp.Width, TmpBmp.Height), ImageLockMode.ReadWrite, TmpBmp.PixelFormat);
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for (int j = 0, offset = 0; j < rect.Height; j++)
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{
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int blockOffset = (Stride * (rect.Y + j)) + (PixelSize * rect.X);
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NativeMethods.memcpy((byte*)TmpData.Scan0.ToPointer() + offset, pScan0 + blockOffset, (uint)blockStride); //copy-changes
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offset += blockStride;
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}
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TmpBmp.UnlockBits(TmpData);
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outStream.Write(BitConverter.GetBytes(rect.X), 0, 4);
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outStream.Write(BitConverter.GetBytes(rect.Y), 0, 4);
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outStream.Write(BitConverter.GetBytes(rect.Width), 0, 4);
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outStream.Write(BitConverter.GetBytes(rect.Height), 0, 4);
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outStream.Write(new byte[4], 0, 4);
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long length = outStream.Position;
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long OldPos = outStream.Position;
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base.jpgCompression.Compress(TmpBmp, ref outStream);
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length = outStream.Position - length;
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outStream.Position = OldPos - 4;
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outStream.Write(BitConverter.GetBytes((int)length), 0, 4);
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outStream.Position += length;
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TmpBmp.Dispose();
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TotalDataLength += (int)length + (4 * 5);
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}
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outStream.Position = oldPos;
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outStream.Write(BitConverter.GetBytes(TotalDataLength), 0, 4);
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}
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private unsafe List<Rectangle> ProcessChanges(IntPtr Scan0, Rectangle OutputRect, PixelFormat Format, int ImageWidth)
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{
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if (EncodeBuffer == null)
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{
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this.BlockWidth = (int)Math.Floor((float)(OutputRect.Width / CheckBlock.Width));
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this.BlockHeight = (int)Math.Floor((double)(OutputRect.Height / CheckBlock.Height));
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int TotalBlocks = (int)Math.Floor((float)(BlockHeight * BlockWidth));
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this.EncodeBuffer = new ulong[TotalBlocks];
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}
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List<Rectangle> points = new List<Rectangle>();
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int StartScan = Scan0.ToInt32();
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for (int y = OutputRect.Y; y < OutputRect.Height + OutputRect.Y; y += CheckBlock.Height)
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{
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if (y + CheckBlock.Height > OutputRect.Height)
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break;
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for (int x = OutputRect.X; x < OutputRect.Width + OutputRect.X; x += CheckBlock.Width)
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{
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if (x + CheckBlock.Width > OutputRect.Width)
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break;
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int EncodeOffset = GetOffset(x, y);
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long offset = FastBitmap.CalcImageOffset(x, y, Format, ImageWidth);
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ulong* ScanPtr = (ulong*)(StartScan + offset);
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if (EncodeBuffer[EncodeOffset] != *ScanPtr)
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{
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EncodeBuffer[EncodeOffset] = *ScanPtr;
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Rectangle cBlock = new Rectangle(x, y, CheckBlock.Width, CheckBlock.Height);
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int index = points.Count - 1;
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if (points.Count > 0 && (points[index].X + points[index].Width) == cBlock.X)
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{
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Rectangle rect = points[index];
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int newWidth = cBlock.Width + rect.Width;
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cBlock = new Rectangle(rect.X, rect.Y, newWidth, rect.Height);
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points[index] = cBlock;
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}
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else
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{
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points.Add(cBlock);
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}
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}
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}
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}
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return points;
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}
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private Point GetOffsetPoint(int x, int y)
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{
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return new Point((int)Math.Floor((float)(y / CheckBlock.Height)) * BlockWidth,
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(int)Math.Floor((double)(x / CheckBlock.Width)));
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}
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private int GetOffset(int x, int y)
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{
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return (int)Math.Floor((float)(y / CheckBlock.Height)) * BlockWidth +
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(int)Math.Floor((double)(x / CheckBlock.Width));
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}
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public override unsafe System.Drawing.Bitmap DecodeData(System.IO.Stream inStream)
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{
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byte[] temp = new byte[4];
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inStream.Read(temp, 0, 4);
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int DataSize = BitConverter.ToInt32(temp, 0);
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if (decodedBitmap == null)
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{
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temp = new byte[DataSize];
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inStream.Read(temp, 0, temp.Length);
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this.decodedBitmap = (Bitmap)Bitmap.FromStream(new MemoryStream(temp));
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return decodedBitmap;
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}
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List<Rectangle> updates = new List<Rectangle>();
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Rectangle rect;
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Graphics g = Graphics.FromImage(decodedBitmap);
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Bitmap tmp;
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byte[] buffer = null;
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MemoryStream m;
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while (DataSize > 0)
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{
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byte[] tempData = new byte[4 * 5];
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inStream.Read(tempData, 0, tempData.Length);
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rect = new Rectangle(BitConverter.ToInt32(tempData, 0), BitConverter.ToInt32(tempData, 4),
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BitConverter.ToInt32(tempData, 8), BitConverter.ToInt32(tempData, 12));
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int UpdateLen = BitConverter.ToInt32(tempData, 16);
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buffer = new byte[UpdateLen];
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inStream.Read(buffer, 0, buffer.Length);
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if (onDecodeDebugScan != null)
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onDecodeDebugScan(rect);
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m = new MemoryStream(buffer);
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tmp = (Bitmap)Image.FromStream(m);
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g.DrawImage(tmp, rect.Location);
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tmp.Dispose();
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m.Close();
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m.Dispose();
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DataSize -= UpdateLen + (4 * 5);
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}
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g.Dispose();
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return decodedBitmap;
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}
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public override unsafe System.Drawing.Bitmap DecodeData(IntPtr CodecBuffer, uint Length)
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{
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if (Length < 4)
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return decodedBitmap;
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int DataSize = *(int*)(CodecBuffer);
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if (decodedBitmap == null)
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{
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byte[] temp = new byte[DataSize];
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fixed (byte* tempPtr = temp)
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{
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NativeMethods.memcpy(new IntPtr(tempPtr), new IntPtr(CodecBuffer.ToInt32() + 4), (uint)DataSize);
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}
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this.decodedBitmap = (Bitmap)Bitmap.FromStream(new MemoryStream(temp));
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return decodedBitmap;
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}
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byte* bufferPtr = (byte*)CodecBuffer.ToInt32();
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if (DataSize > 0)
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{
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Graphics g = Graphics.FromImage(decodedBitmap);
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for (int i = 4; DataSize > 0; )
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{
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Rectangle rect = new Rectangle(*(int*)(bufferPtr + i), *(int*)(bufferPtr + i + 4),
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*(int*)(bufferPtr + i + 8), *(int*)(bufferPtr + i + 12));
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int UpdateLen = *(int*)(bufferPtr + i + 16);
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byte[] temp = new byte[UpdateLen];
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fixed (byte* tempPtr = temp)
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{
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NativeMethods.memcpy(new IntPtr(tempPtr), new IntPtr(CodecBuffer.ToInt32() + i + 20), (uint)UpdateLen);
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using (Bitmap TmpBmp = new Bitmap(rect.Width, rect.Height, rect.Width * 3, decodedBitmap.PixelFormat, new IntPtr(tempPtr)))
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{
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g.DrawImage(TmpBmp, new Point(rect.X, rect.Y));
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}
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}
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DataSize -= UpdateLen + (4 * 5);
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i += UpdateLen + (4 * 5);
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}
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g.Dispose();
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}
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return decodedBitmap;
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}
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}
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}
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