mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-11-22 03:02:35 +01:00
811 lines
32 KiB
C#
811 lines
32 KiB
C#
/*
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* Copyright 2009 Volker Oth (0xdeadbeef)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* NOTE: Converted to C# and modified by Nikse.dk@gmail.com
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*/
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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 Nikse.SubtitleEdit.Core.BluRaySup
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{
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public static class BluRaySupParser
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{
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private class SupSegment
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{
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/// <summary>
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/// Type of segment
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/// </summary>
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public int Type;
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/// <summary>
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/// segment size in bytes
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/// </summary>
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public int Size;
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/// <summary>
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/// segment PTS time stamp
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/// </summary>
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public long PtsTimestamp;
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/// <summary>
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/// segment DTS time stamp
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/// </summary>
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public long DtsTimestamp;
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}
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public class PcsObject
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{
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public int ObjectId;
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public int WindowId;
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public bool IsForced;
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public Point Origin;
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}
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public static class SupDecoder
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{
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private const int AlphaCrop = 14;
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public static BluRaySupPalette DecodePalette(IList<PaletteInfo> paletteInfos)
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{
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BluRaySupPalette palette = new BluRaySupPalette(256);
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// by definition, index 0xff is always completely transparent
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// also all entries must be fully transparent after initialization
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bool fadeOut = false;
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for (int j = 0; j < paletteInfos.Count; j++)
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{
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PaletteInfo p = paletteInfos[j];
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int index = 0;
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for (int i = 0; i < p.PaletteSize; i++)
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{
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// each palette entry consists of 5 bytes
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int palIndex = p.PaletteBuffer[index];
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int y = p.PaletteBuffer[++index];
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int cr = p.PaletteBuffer[++index];
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int cb = p.PaletteBuffer[++index];
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int alpha = p.PaletteBuffer[++index];
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int alphaOld = palette.GetAlpha(palIndex);
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// avoid fading out
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if (alpha >= alphaOld)
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{
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if (alpha < AlphaCrop)
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{// to not mess with scaling algorithms, make transparent color black
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y = 16;
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cr = 128;
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cb = 128;
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}
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palette.SetAlpha(palIndex, alpha);
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}
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else
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{
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fadeOut = true;
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}
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palette.SetYCbCr(palIndex, y, cb, cr);
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index++;
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}
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}
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if (fadeOut)
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{
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System.Diagnostics.Debug.Print("fade out detected -> patched palette\n");
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}
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return palette;
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}
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/// <summary>
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/// Decode caption from the input stream
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/// </summary>
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/// <returns>bitmap of the decoded caption</returns>
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public static Bitmap DecodeImage(PcsObject pcs, IList<OdsData> data, List<PaletteInfo> palettes)
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{
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long ticks = DateTime.Now.Ticks;
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if (pcs == null || data == null || data.Count == 0)
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return new Bitmap(1, 1);
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int w = data[0].Size.Width;
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int h = data[0].Size.Height;
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var bm = new FastBitmap(new Bitmap(w, h));
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bm.LockImage();
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BluRaySupPalette pal = DecodePalette(palettes);
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int index = 0;
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int ofs = 0;
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int xpos = 0;
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byte[] buf = data[0].Fragment.ImageBuffer;
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index = 0;
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do
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{
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int b = buf[index++] & 0xff;
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if (b == 0 && index < buf.Length)
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{
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b = buf[index++] & 0xff;
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if (b == 0)
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{
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// next line
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ofs = (ofs / w) * w;
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if (xpos < w)
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ofs += w;
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xpos = 0;
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}
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else
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{
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int size;
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if ((b & 0xC0) == 0x40)
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{
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if (index < buf.Length)
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{
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// 00 4x xx -> xxx zeroes
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size = ((b - 0x40) << 8) + (buf[index++] & 0xff);
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Color c = Color.FromArgb(pal.GetArgb(0));
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for (int i = 0; i < size; i++)
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PutPixel(bm, ofs++, c);
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xpos += size;
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}
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}
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else if ((b & 0xC0) == 0x80)
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{
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if (index < buf.Length)
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{
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// 00 8x yy -> x times value y
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size = (b - 0x80);
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b = buf[index++] & 0xff;
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Color c = Color.FromArgb(pal.GetArgb(b));
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for (int i = 0; i < size; i++)
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PutPixel(bm, ofs++, c);
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xpos += size;
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}
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}
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else if ((b & 0xC0) != 0)
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{
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if (index < buf.Length)
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{
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// 00 cx yy zz -> xyy times value z
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size = ((b - 0xC0) << 8) + (buf[index++] & 0xff);
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b = buf[index++] & 0xff;
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Color c = Color.FromArgb(pal.GetArgb(b));
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for (int i = 0; i < size; i++)
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PutPixel(bm, ofs++, c);
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xpos += size;
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}
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}
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else
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{
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// 00 xx -> xx times 0
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Color c = Color.FromArgb(pal.GetArgb(0));
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for (int i = 0; i < b; i++)
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PutPixel(bm, ofs++, c);
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xpos += b;
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}
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}
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}
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else
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{
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PutPixel(bm, ofs++, b, pal);
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xpos++;
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}
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} while (index < buf.Length);
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bm.UnlockImage();
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return bm.GetBitmap();
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}
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private static void PutPixel(FastBitmap bmp, int index, int color, BluRaySupPalette palette)
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{
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int x = index % bmp.Width;
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int y = index / bmp.Width;
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if (x < bmp.Width && y < bmp.Height)
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bmp.SetPixel(x, y, Color.FromArgb(palette.GetArgb(color)));
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}
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private static void PutPixel(FastBitmap bmp, int index, Color color)
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{
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if (color.A > 0)
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{
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int x = index % bmp.Width;
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int y = index / bmp.Width;
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if (x < bmp.Width && y < bmp.Height)
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bmp.SetPixel(x, y, color);
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}
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}
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}
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public class PcsData
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{
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public int CompNum;
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public CompositionState CompositionState;
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public bool PaletteUpdate;
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public long StartTime; // Pts
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public long EndTime; // end Pts
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public Size Size;
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public int FramesPerSecondType;
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public int PaletteId;
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public List<PcsObject> PcsObjects;
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public string Message;
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public List<List<OdsData>> BitmapObjects;
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public List<PaletteInfo> PaletteInfos;
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/// <summary>
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/// if true, contains forced entry
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/// </summary>
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public bool IsForced
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{
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get
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{
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foreach (PcsObject obj in PcsObjects)
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{
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if (obj.IsForced)
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return true;
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}
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return false;
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}
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}
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public Bitmap GetBitmap()
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{
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if (PcsObjects.Count == 1)
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return SupDecoder.DecodeImage(PcsObjects[0], BitmapObjects[0], PaletteInfos);
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var r = Rectangle.Empty;
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for (int ioIndex = 0; ioIndex < PcsObjects.Count; ioIndex++)
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{
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var ioRect = new Rectangle(PcsObjects[ioIndex].Origin, BitmapObjects[ioIndex][0].Size);
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if (r.IsEmpty)
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r = ioRect;
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else
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r = Rectangle.Union(r, ioRect);
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}
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var mergedBmp = new Bitmap(r.Width, r.Height, PixelFormat.Format32bppArgb);
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for (var ioIndex = 0; ioIndex < PcsObjects.Count; ioIndex++)
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{
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var offset = PcsObjects[ioIndex].Origin - new Size(r.Location);
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using (var singleBmp = SupDecoder.DecodeImage(PcsObjects[ioIndex], BitmapObjects[ioIndex], PaletteInfos))
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using (var gSideBySide = Graphics.FromImage(mergedBmp))
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{
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gSideBySide.DrawImage(singleBmp, offset.X, offset.Y);
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}
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}
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return mergedBmp;
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}
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}
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public class PdsData
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{
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public string Message;
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public int PaletteId;
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public int PaletteVersion;
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public PaletteInfo PaletteInfo;
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}
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public class OdsData
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{
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public int ObjectId;
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public int ObjectVersion;
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public string Message;
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public bool IsFirst;
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public Size Size;
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public ImageObjectFragment Fragment;
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}
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/// <summary>
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/// PGS composition state
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/// </summary>
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public enum CompositionState
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{
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/// <summary>
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/// Normal: doesn't have to be complete
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/// </summary>
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Normal,
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/// <summary>
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/// Acquisition point
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/// </summary>
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AcquPoint,
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/// <summary>
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/// Epoch start - clears the screen
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/// </summary>
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EpochStart,
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/// <summary>
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/// Epoch continue
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/// </summary>
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EpochContinue,
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/// <summary>
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/// Unknown value
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/// </summary>
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Invalid,
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}
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private const int HeaderSize = 13;
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/// <summary>
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/// Parses a Blu-ray sup file
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/// </summary>
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/// <param name="fileName">BluRay sup file name</param>
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/// <param name="log">Parsing info is logged here</param>
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/// <returns>List of BluRaySupPictures</returns>
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public static List<PcsData> ParseBluRaySup(string fileName, StringBuilder log)
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{
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using (var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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return ParseBluRaySup(fs, log, false);
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}
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}
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private static SupSegment ParseSegmentHeader(byte[] buffer, StringBuilder log)
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{
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var segment = new SupSegment();
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if (buffer[0] == 0x50 && buffer[1] == 0x47) // 80 + 71 - P G
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{
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segment.PtsTimestamp = BigEndianInt32(buffer, 2); // read PTS
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segment.DtsTimestamp = BigEndianInt32(buffer, 6); // read PTS
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segment.Type = buffer[10];
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segment.Size = BigEndianInt16(buffer, 11);
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}
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else
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{
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log.AppendLine("Unable to read segment - PG missing!");
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}
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return segment;
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}
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private static SupSegment ParseSegmentHeaderFromMatroska(byte[] buffer)
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{
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var segment = new SupSegment();
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segment.Type = buffer[0];
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segment.Size = BigEndianInt16(buffer, 1);
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return segment;
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}
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/// <summary>
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/// Parse an PCS packet which contains width/height info
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/// </summary>
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/// <param name="buffer">Raw data buffer, starting right after segment</param>
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private static PcsObject ParsePcs(byte[] buffer, int offset)
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{
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var pcs = new PcsObject();
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// composition_object:
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pcs.ObjectId = BigEndianInt16(buffer, 11 + offset); // 16bit object_id_ref
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pcs.WindowId = buffer[13 + offset];
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// skipped: 8bit window_id_ref
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// object_cropped_flag: 0x80, forced_on_flag = 0x040, 6bit reserved
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int forcedCropped = buffer[14 + offset];
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pcs.IsForced = ((forcedCropped & 0x40) == 0x40);
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pcs.Origin = new Point(BigEndianInt16(buffer, 15 + offset), BigEndianInt16(buffer, 17 + offset));
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return pcs;
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}
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private static PcsData ParsePicture(byte[] buffer, SupSegment segment)
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{
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var sb = new StringBuilder();
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var pcs = new PcsData();
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pcs.Size = new Size(BigEndianInt16(buffer, 0), BigEndianInt16(buffer, 2));
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pcs.FramesPerSecondType = buffer[4]; // hi nibble: frame_rate, lo nibble: reserved
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pcs.CompNum = BigEndianInt16(buffer, 5);
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pcs.CompositionState = GetCompositionState(buffer[7]);
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pcs.StartTime = segment.PtsTimestamp;
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// 8bit palette_update_flag (0x80), 7bit reserved
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pcs.PaletteUpdate = (buffer[8] == 0x80);
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pcs.PaletteId = buffer[9]; // 8bit palette_id_ref
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int compositionObjectCount = buffer[10]; // 8bit number_of_composition_objects (0..2)
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sb.AppendFormat("CompNum: {0}, Pts: {1}, State: {2}, PalUpdate: {3}, PalId {4}", pcs.CompNum, ToolBox.PtsToTimeString(pcs.StartTime), pcs.CompositionState, pcs.PaletteUpdate, pcs.PaletteId);
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if (pcs.CompositionState == CompositionState.Invalid)
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{
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sb.Append("Illegal composition state Invalid");
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}
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else
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{
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int offset = 0;
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pcs.PcsObjects = new List<PcsObject>();
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for (int compObjIndex = 0; compObjIndex < compositionObjectCount; compObjIndex++)
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{
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PcsObject pcsObj = ParsePcs(buffer, offset);
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pcs.PcsObjects.Add(pcsObj);
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sb.AppendLine();
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sb.AppendFormat("ObjId: {0}, WinId: {1}, Forced: {2}, X: {3}, Y: {4}",
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pcsObj.ObjectId, pcsObj.WindowId, pcsObj.IsForced, pcsObj.Origin.X, pcsObj.Origin.Y);
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offset += 8;
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}
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}
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pcs.Message = sb.ToString();
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return pcs;
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}
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private static bool CompletePcs(PcsData pcs, Dictionary<int, List<OdsData>> bitmapObjects, Dictionary<int, List<PaletteInfo>> palettes)
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{
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if (pcs == null || pcs.PcsObjects == null || palettes == null)
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return false;
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if (pcs.PcsObjects.Count == 0)
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return true;
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if (!palettes.ContainsKey(pcs.PaletteId))
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return false;
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pcs.PaletteInfos = new List<PaletteInfo>(palettes[pcs.PaletteId]);
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pcs.BitmapObjects = new List<List<OdsData>>();
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for (int index = 0; index < pcs.PcsObjects.Count; index++)
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{
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int objId = pcs.PcsObjects[index].ObjectId;
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if (!bitmapObjects.ContainsKey(objId))
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return false;
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pcs.BitmapObjects.Add(bitmapObjects[objId]);
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}
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return true;
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}
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/// <summary>
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/// parse an PDS packet which contain palette info
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/// </summary>
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/// <param name="buffer">Buffer of raw byte data, starting right after segment</param>
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/// <param name="segment">object containing info about the current segment</param>
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/// <returns>number of valid palette entries (-1 for fault)</returns>
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private static PdsData ParsePds(byte[] buffer, SupSegment segment)
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{
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int paletteId = buffer[0]; // 8bit palette ID (0..7)
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// 8bit palette version number (incremented for each palette change)
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int paletteUpdate = buffer[1];
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var p = new PaletteInfo();
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p.PaletteSize = (segment.Size - 2) / 5;
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if (p.PaletteSize <= 0)
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return new PdsData { Message = "Empty palette" };
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p.PaletteBuffer = new byte[p.PaletteSize * 5];
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Buffer.BlockCopy(buffer, 2, p.PaletteBuffer, 0, p.PaletteSize * 5); // save palette buffer in palette object
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return new PdsData
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{
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Message = "PalId: " + paletteId + ", update: " + paletteUpdate + ", " + p.PaletteSize + " entries",
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PaletteId = paletteId,
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PaletteVersion = paletteUpdate,
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PaletteInfo = p,
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};
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}
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/// <summary>
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/// parse an ODS packet which contain the image data
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/// </summary>
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/// <param name="buffer">raw byte date, starting right after segment</param>
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/// <param name="segment">object containing info about the current segment</param>
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/// <returns>true if this is a valid new object (neither invalid nor a fragment)</returns>
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private static OdsData ParseOds(byte[] buffer, SupSegment segment, bool forceFirst)
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{
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int objId = BigEndianInt16(buffer, 0); // 16bit object_id
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int objVer = buffer[2]; // 16bit object_id nikse - index 2 or 1???
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int objSeq = buffer[3]; // 8bit first_in_sequence (0x80),
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// last_in_sequence (0x40), 6bits reserved
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bool first = ((objSeq & 0x80) == 0x80) || forceFirst;
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bool last = (objSeq & 0x40) == 0x40;
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var info = new ImageObjectFragment();
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if (first)
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{
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int width = BigEndianInt16(buffer, 7); // object_width
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int height = BigEndianInt16(buffer, 9); // object_height
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info.ImagePacketSize = segment.Size - 11; // Image packet size (image bytes)
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info.ImageBuffer = new byte[info.ImagePacketSize];
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Buffer.BlockCopy(buffer, 11, info.ImageBuffer, 0, info.ImagePacketSize);
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return new OdsData
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{
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IsFirst = true,
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Size = new Size(width, height),
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ObjectId = objId,
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ObjectVersion = objVer,
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Fragment = info,
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Message = "ObjId: " + objId + ", ver: " + objVer + ", seq: first" + (last ? "/" : "") + (last ? "" + "last" : "") + ", width: " + width + ", height: " + height,
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};
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}
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else
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{
|
|
info.ImagePacketSize = segment.Size - 4;
|
|
info.ImageBuffer = new byte[info.ImagePacketSize];
|
|
Buffer.BlockCopy(buffer, 4, info.ImageBuffer, 0, info.ImagePacketSize);
|
|
|
|
return new OdsData
|
|
{
|
|
IsFirst = false,
|
|
ObjectId = objId,
|
|
ObjectVersion = objVer,
|
|
Fragment = info,
|
|
Message = "Continued ObjId: " + objId + ", ver: " + objVer + ", seq: " + (last ? "" + "last" : ""),
|
|
};
|
|
}
|
|
}
|
|
|
|
public static List<PcsData> ParseBluRaySup(Stream ms, StringBuilder log, bool fromMatroskaFile)
|
|
{
|
|
long position = ms.Position;
|
|
int segmentCount = 0;
|
|
var palettes = new Dictionary<int, List<PaletteInfo>>();
|
|
bool forceFirstOds = true;
|
|
var bitmapObjects = new Dictionary<int, List<OdsData>>();
|
|
PcsData latestPcs = null;
|
|
int latestCompNum = -1;
|
|
var pcsList = new List<PcsData>();
|
|
byte[] headerBuffer;
|
|
if (fromMatroskaFile)
|
|
headerBuffer = new byte[3];
|
|
else
|
|
headerBuffer = new byte[HeaderSize];
|
|
|
|
while (position < ms.Length)
|
|
{
|
|
ms.Seek(position, SeekOrigin.Begin);
|
|
|
|
// Read segment header
|
|
ms.Read(headerBuffer, 0, headerBuffer.Length);
|
|
SupSegment segment;
|
|
if (fromMatroskaFile)
|
|
segment = ParseSegmentHeaderFromMatroska(headerBuffer);
|
|
else
|
|
segment = ParseSegmentHeader(headerBuffer, log);
|
|
position += headerBuffer.Length;
|
|
|
|
// Read segment data
|
|
var buffer = new byte[segment.Size];
|
|
ms.Read(buffer, 0, buffer.Length);
|
|
log.Append(segmentCount + ": ");
|
|
|
|
switch (segment.Type)
|
|
{
|
|
case 0x14: // Palette
|
|
if (latestPcs != null)
|
|
{
|
|
log.AppendLine(string.Format("0x14 - Palette - PDS offset={0} size={1}", position, segment.Size));
|
|
PdsData pds = ParsePds(buffer, segment);
|
|
log.AppendLine(pds.Message);
|
|
if (pds.PaletteInfo != null)
|
|
{
|
|
if (!palettes.ContainsKey(pds.PaletteId))
|
|
{
|
|
palettes[pds.PaletteId] = new List<PaletteInfo>();
|
|
}
|
|
else
|
|
{
|
|
if (latestPcs.PaletteUpdate)
|
|
{
|
|
palettes[pds.PaletteId].RemoveAt(palettes[pds.PaletteId].Count - 1);
|
|
}
|
|
else
|
|
{
|
|
log.AppendLine("Extra Palette");
|
|
}
|
|
}
|
|
palettes[pds.PaletteId].Add(pds.PaletteInfo);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x15: // Image bitmap data
|
|
if (latestPcs != null)
|
|
{
|
|
log.AppendLine(string.Format("0x15 - Bitmap data - ODS offset={0} size={1}", position, segment.Size));
|
|
OdsData ods = ParseOds(buffer, segment, forceFirstOds);
|
|
log.AppendLine(ods.Message);
|
|
if (!latestPcs.PaletteUpdate)
|
|
{
|
|
List<OdsData> odsList;
|
|
if (ods.IsFirst)
|
|
{
|
|
odsList = new List<OdsData>();
|
|
odsList.Add(ods);
|
|
bitmapObjects[ods.ObjectId] = odsList;
|
|
}
|
|
else
|
|
{
|
|
if (bitmapObjects.TryGetValue(ods.ObjectId, out odsList))
|
|
{
|
|
odsList.Add(ods);
|
|
}
|
|
else
|
|
{
|
|
log.AppendLine(string.Format("INVALID ObjectId {0} in ODS, offset={1}", ods.ObjectId, position));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
log.AppendLine(string.Format("Bitmap Data Ignore due to PaletteUpdate offset={0}", position));
|
|
}
|
|
forceFirstOds = false;
|
|
}
|
|
break;
|
|
|
|
case 0x16: // Picture time codes
|
|
if (latestPcs != null)
|
|
{
|
|
if (CompletePcs(latestPcs, bitmapObjects, palettes))
|
|
{
|
|
pcsList.Add(latestPcs);
|
|
}
|
|
latestPcs = null;
|
|
}
|
|
|
|
log.AppendLine(string.Format("0x16 - Picture codes, offset={0} size={1}", position, segment.Size));
|
|
forceFirstOds = true;
|
|
PcsData nextPcs = ParsePicture(buffer, segment);
|
|
log.AppendLine(nextPcs.Message);
|
|
latestPcs = nextPcs;
|
|
latestCompNum = nextPcs.CompNum;
|
|
if (latestPcs.CompositionState == CompositionState.EpochStart)
|
|
{
|
|
bitmapObjects.Clear();
|
|
palettes.Clear();
|
|
}
|
|
break;
|
|
|
|
case 0x17: // Window display
|
|
if (latestPcs != null)
|
|
{
|
|
log.AppendLine(string.Format("0x17 - Window display offset={0} size={1}", position, segment.Size));
|
|
int windowCount = buffer[0];
|
|
int offset = 0;
|
|
for (int nextWindow = 0; nextWindow < windowCount; nextWindow++)
|
|
{
|
|
int windowId = buffer[1 + offset];
|
|
int x = BigEndianInt16(buffer, 2 + offset);
|
|
int y = BigEndianInt16(buffer, 4 + offset);
|
|
int width = BigEndianInt16(buffer, 6 + offset);
|
|
int height = BigEndianInt16(buffer, 8 + offset);
|
|
log.AppendLine(string.Format("WinId: {4}, X: {0}, Y: {1}, Width: {2}, Height: {3}",
|
|
x, y, width, height, windowId));
|
|
offset += 9;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x80:
|
|
forceFirstOds = true;
|
|
log.AppendLine(string.Format("0x80 - END offset={0} size={1}", position, segment.Size));
|
|
if (latestPcs != null)
|
|
{
|
|
if (CompletePcs(latestPcs, bitmapObjects, palettes))
|
|
{
|
|
pcsList.Add(latestPcs);
|
|
}
|
|
latestPcs = null;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
log.AppendLine(string.Format("0x?? - END offset={0} UNKOWN SEGMENT TYPE={1}", position, segment.Type));
|
|
break;
|
|
}
|
|
position += segment.Size;
|
|
segmentCount++;
|
|
}
|
|
|
|
if (latestPcs != null)
|
|
{
|
|
if (CompletePcs(latestPcs, bitmapObjects, palettes))
|
|
pcsList.Add(latestPcs);
|
|
latestPcs = null;
|
|
}
|
|
|
|
for (int pcsIndex = 1; pcsIndex < pcsList.Count; pcsIndex++)
|
|
pcsList[pcsIndex - 1].EndTime = pcsList[pcsIndex].StartTime;
|
|
pcsList.RemoveAll(pcs => pcs.PcsObjects.Count == 0);
|
|
|
|
foreach (PcsData pcs in pcsList)
|
|
{
|
|
foreach (List<OdsData> odsList in pcs.BitmapObjects)
|
|
{
|
|
if (odsList.Count > 1)
|
|
{
|
|
int bufSize = 0;
|
|
foreach (OdsData ods in odsList)
|
|
bufSize += ods.Fragment.ImagePacketSize;
|
|
byte[] buf = new byte[bufSize];
|
|
int offset = 0;
|
|
foreach (OdsData ods in odsList)
|
|
{
|
|
Buffer.BlockCopy(ods.Fragment.ImageBuffer, 0, buf, offset, ods.Fragment.ImagePacketSize);
|
|
offset += ods.Fragment.ImagePacketSize;
|
|
}
|
|
odsList[0].Fragment.ImageBuffer = buf;
|
|
odsList[0].Fragment.ImagePacketSize = bufSize;
|
|
while (odsList.Count > 1)
|
|
odsList.RemoveAt(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int pcsIndex = pcsList.Count - 1; pcsIndex > 0; pcsIndex--)
|
|
{
|
|
var cur = pcsList[pcsIndex];
|
|
var prev = pcsList[pcsIndex - 1];
|
|
if (Math.Abs(prev.EndTime - cur.StartTime) < 10 && prev.Size.Width == cur.Size.Width && prev.Size.Height == cur.Size.Height)
|
|
{
|
|
if (cur.BitmapObjects.Count > 0 && cur.BitmapObjects[0].Count > 0 &&
|
|
prev.BitmapObjects.Count > 0 && prev.BitmapObjects[0].Count > 0 &&
|
|
ByteArraysEqual(cur.BitmapObjects[0][0].Fragment.ImageBuffer, prev.BitmapObjects[0][0].Fragment.ImageBuffer))
|
|
{
|
|
prev.EndTime = cur.EndTime;
|
|
pcsList.RemoveAt(pcsIndex);
|
|
}
|
|
}
|
|
}
|
|
|
|
return pcsList;
|
|
}
|
|
|
|
private static bool ByteArraysEqual(byte[] b1, byte[] b2)
|
|
{
|
|
if (b1 == b2)
|
|
return true;
|
|
if (b1 == null || b2 == null)
|
|
return false;
|
|
if (b1.Length != b2.Length)
|
|
return false;
|
|
|
|
for (int i = 0; i < b1.Length; i++)
|
|
{
|
|
if (b1[i] != b2[i])
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private static CompositionState GetCompositionState(byte type)
|
|
{
|
|
switch (type)
|
|
{
|
|
case 0x00:
|
|
return CompositionState.Normal;
|
|
case 0x40:
|
|
return CompositionState.AcquPoint;
|
|
case 0x80:
|
|
return CompositionState.EpochStart;
|
|
case 0xC0:
|
|
return CompositionState.EpochContinue;
|
|
default:
|
|
return CompositionState.Invalid;
|
|
}
|
|
}
|
|
|
|
public static int BigEndianInt16(byte[] buffer, int index)
|
|
{
|
|
if (buffer.Length < 2)
|
|
return 0;
|
|
return buffer[index + 1] | (buffer[index] << 8);
|
|
}
|
|
|
|
private static uint BigEndianInt32(byte[] buffer, int index)
|
|
{
|
|
if (buffer.Length < 4)
|
|
return 0;
|
|
return (uint)((buffer[index + 3]) + (buffer[index + 2] << 8) + (buffer[index + 1] << 0x10) + (buffer[index + 0] << 0x18));
|
|
}
|
|
|
|
}
|
|
}
|