132 lines
4.7 KiB
C#
132 lines
4.7 KiB
C#
//============================================================================
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// BDInfo - Blu-ray Video and Audio Analysis Tool
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// Copyright © 2010 Cinema Squid
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//=============================================================================
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namespace BDInfo
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{
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public abstract class TSCodecVC1
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{
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public static void Scan(
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TSVideoStream stream,
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TSStreamBuffer buffer,
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ref string tag)
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{
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int parse = 0;
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byte frameHeaderParse = 0;
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byte sequenceHeaderParse = 0;
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bool isInterlaced = false;
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for (int i = 0; i < buffer.Length; i++)
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{
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parse = (parse << 8) + buffer.ReadByte();
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if (parse == 0x0000010D)
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{
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frameHeaderParse = 4;
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}
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else if (frameHeaderParse > 0)
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{
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--frameHeaderParse;
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if (frameHeaderParse == 0)
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{
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uint pictureType = 0;
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if (isInterlaced)
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{
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if ((parse & 0x80000000) == 0)
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{
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pictureType =
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(uint)((parse & 0x78000000) >> 13);
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}
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else
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{
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pictureType =
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(uint)((parse & 0x3c000000) >> 12);
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}
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}
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else
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{
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pictureType =
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(uint)((parse & 0xf0000000) >> 14);
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}
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if ((pictureType & 0x20000) == 0)
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{
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tag = "P";
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}
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else if ((pictureType & 0x10000) == 0)
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{
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tag = "B";
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}
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else if ((pictureType & 0x8000) == 0)
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{
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tag = "I";
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}
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else if ((pictureType & 0x4000) == 0)
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{
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tag = "BI";
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}
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else
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{
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tag = null;
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}
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if (stream.IsInitialized) return;
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}
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}
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else if (parse == 0x0000010F)
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{
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sequenceHeaderParse = 6;
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}
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else if (sequenceHeaderParse > 0)
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{
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--sequenceHeaderParse;
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switch (sequenceHeaderParse)
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{
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case 5:
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int profileLevel = ((parse & 0x38) >> 3);
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if (((parse & 0xC0) >> 6) == 3)
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{
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stream.EncodingProfile = string.Format(
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"Advanced Profile {0}", profileLevel);
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}
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else
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{
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stream.EncodingProfile = string.Format(
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"Main Profile {0}", profileLevel);
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}
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break;
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case 0:
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if (((parse & 0x40) >> 6) > 0)
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{
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isInterlaced = true;
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}
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else
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{
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isInterlaced = false;
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}
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break;
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}
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stream.IsVBR = true;
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stream.IsInitialized = true;
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}
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}
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}
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}
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}
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