266 lines
10 KiB
C#
266 lines
10 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.IO;
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using System.Text;
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namespace StreamLibrary.Codecs
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{
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public class SmallStreamCodec : IVideoCodec
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{
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public override event IVideoCodec.VideoCodeProgress onVideoStreamCoding;
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public override event IVideoCodec.VideoDecodeProgress onVideoStreamDecoding;
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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 1; }
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}
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public override ulong CachedSize
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{
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get;
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internal set;
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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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public Size CheckBlock { get; set; }
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public SimpleBitmap LastFrame { get; set; }
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private object ImageProcessLock = new object();
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private Bitmap decodedBitmap;
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/// <summary>
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/// Initialize a new object of SmallStreamCodec
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/// </summary>
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/// <param name="ImageQuality">The image quality 0-100%</param>
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public SmallStreamCodec(int ImageQuality = 100)
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: base(ImageQuality)
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{
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CheckBlock = new Size(20, 1);
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}
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private void SetLastFrame(ref Bitmap bmp)
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{
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SetLastFrame(new SimpleBitmap(bmp));
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}
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private void SetLastFrame(SimpleBitmap bmp)
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{
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lock (ImageProcessLock)
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{
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if (LastFrame != null && LastFrame.Locked)
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LastFrame.Dispose(true);
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LastFrame = bmp;
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}
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}
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/// <summary>
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/// Encode the image
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/// </summary>
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/// <param name="bitmap">The image you want to encode.</param>
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/// <param name="outStream">The output stream</param>
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public override unsafe void CodeImage(Bitmap bitmap, Stream outStream)
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{
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lock (ImageProcessLock)
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{
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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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if (LastFrame == null)
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{
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byte[] temp = base.jpgCompression.Compress(bitmap);
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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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SetLastFrame(ref bitmap);
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return;
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}
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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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List<byte[]> updates = new List<byte[]>();
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SimpleBitmap sbBmp = new SimpleBitmap(bitmap);
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MemoryStream ms = new MemoryStream();
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byte[] buffer = null;
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if (!LastFrame.Locked)
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LastFrame.Lock();
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sbBmp.Lock();
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if (sbBmp.Info.PixelSize != LastFrame.Info.PixelSize)
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throw new Exception("PixelFormat is not equal to previous Bitmap");
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if (LastFrame.Info.Width != sbBmp.Info.Width || LastFrame.Info.Height != sbBmp.Info.Height)
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{
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sbBmp.Unlock();
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throw new Exception("Bitmap width/height are not equal to previous bitmap");
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}
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List<Rectangle> Blocks = new List<Rectangle>();
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int index = 0;
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int y = 0;
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int x = 0;
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Size s = new Size(bitmap.Width, CheckBlock.Height);
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Size lastSize = new Size(bitmap.Width % CheckBlock.Width, bitmap.Height % CheckBlock.Height);
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int lasty = bitmap.Height - lastSize.Height;
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int lastx = bitmap.Width - lastSize.Width;
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Rectangle cBlock = new Rectangle();
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s = new Size(bitmap.Width, s.Height);
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while (y != bitmap.Height)
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{
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if (y == lasty)
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s = new Size(bitmap.Width, lastSize.Height);
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cBlock = new Rectangle(0, y, bitmap.Width, s.Height);
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if (onCodeDebugScan != null)
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onCodeDebugScan(cBlock);
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if (!SimpleBitmap.Compare(cBlock, LastFrame.Scan0_int, sbBmp.Scan0_int, sbBmp.Info))
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//if (!SimpleBitmap.Compare(y, s.Height, LastFrame.Scan0_int, sbBmp.Scan0_int, sbBmp.Info))
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{
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index = Blocks.Count - 1;
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if (Blocks.Count != 0 && (Blocks[index].Y + Blocks[index].Height) == cBlock.Y)
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{
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cBlock = new Rectangle(Blocks[index].X, Blocks[index].Y, Blocks[index].Width, Blocks[index].Height + cBlock.Height);
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Blocks[index] = cBlock;
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}
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else
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{
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Blocks.Add(cBlock);
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}
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}
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y += s.Height;
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}
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List<Rectangle> finalUpdates = new List<Rectangle>();
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for (int i = 0; i < Blocks.Count; i++)
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{
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s = new Size(CheckBlock.Width, Blocks[i].Height);
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x = 0;
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while (x != bitmap.Width)
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{
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if (x == lastx)
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s = new Size(lastSize.Width, Blocks[i].Height);
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cBlock = new Rectangle(x, Blocks[i].Y, s.Width, Blocks[i].Height);
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if (onCodeDebugScan != null)
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onCodeDebugScan(cBlock);
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if (!SimpleBitmap.Compare(cBlock, sbBmp.Scan0_int, LastFrame.Scan0_int, sbBmp.Info))
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{
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index = finalUpdates.Count - 1;
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if (finalUpdates.Count > 0 && (finalUpdates[index].X + finalUpdates[index].Width) == cBlock.X)
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{
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Rectangle rect = finalUpdates[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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finalUpdates[index] = cBlock;
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}
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else
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{
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finalUpdates.Add(cBlock);
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}
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}
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x += s.Width;
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}
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}
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for (int i = 0; i < finalUpdates.Count; i++)
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{
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Rectangle rect = finalUpdates[i];
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sbBmp.CopyBlock(rect, ref buffer);
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fixed (byte* ptr = buffer)
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{
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using (Bitmap TmpBmp = new Bitmap(rect.Width, rect.Height, rect.Width * LastFrame.Info.PixelSize, LastFrame.bitmapData.PixelFormat, new IntPtr(ptr)))
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{
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buffer = base.jpgCompression.Compress(TmpBmp);
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}
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}
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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(BitConverter.GetBytes(buffer.Length), 0, 4);
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outStream.Write(buffer, 0, buffer.Length);
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TotalDataLength += buffer.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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Blocks.Clear();
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SetLastFrame(sbBmp);
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ms.Close();
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ms.Dispose();
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}
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}
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/// <summary>
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/// Decode the video stream
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/// </summary>
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/// <param name="inStream">The input stream</param>
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/// <returns>The image that has been decoded</returns>
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public override Bitmap DecodeData(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 -= buffer.Length + (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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}
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} |